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428
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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793
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4 Copyright (C) 2000, 2001, 2002 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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24
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853
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25 /* Authorship:
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26
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27 Based on code from pre-release FSF 19, c. 1991.
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28 Some work by Richard Mlynarik long ago (c. 1993?) --
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29 added call-with-condition-handler; synch. up to released FSF 19.7
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30 for lemacs 19.8. some signal changes.
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31 Various work by Ben Wing, 1995-1996:
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32 added all stuff dealing with trapping errors, suspended-errors, etc.
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33 added most Fsignal front ends.
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34 added warning code.
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35 reworked the Fsignal code and synched the rest up to FSF 19.30.
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36 Some changes by Martin Buchholz c. 1999?
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37 e.g. PRIMITIVE_FUNCALL macros.
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38 New call_trapping_problems code and large comments below
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39 by Ben Wing, Mar-Apr 2000.
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40 */
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41
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42 /* This file has been Mule-ized. */
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43
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44 /* What is in this file?
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45
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46 This file contains the engine for the ELisp interpreter in XEmacs.
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47 The engine does the actual work of implementing function calls,
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48 form evaluation, non-local exits (catch, throw, signal,
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49 condition-case, call-with-condition-handler), unwind-protects,
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50 dynamic bindings, let constructs, backtraces, etc. You might say
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51 that this module is the very heart of XEmacs, and everything else
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52 in XEmacs is merely an auxiliary module implementing some specific
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53 functionality that may be called from the heart at an appropriate
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54 time.
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55
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56 The only exception is the alloc.c module, which implements the
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57 framework upon which this module (eval.c) works. alloc.c works
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58 with creating the actual Lisp objects themselves and garbage
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59 collecting them as necessary, preseting a nice, high-level
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60 interface for object creation, deletion, access, and modification.
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61
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62 The only other exception that could be cited is the event-handling
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63 module in event-stream.c. From its perspective, it is also the
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64 heart of XEmacs, and controls exactly what gets done at what time.
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65 From its perspective, eval.c is merely one of the auxiliary modules
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66 out there that can be invoked by event-stream.c.
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67
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68 Although the event-stream-centric view is a convenient fiction that
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69 makes sense particularly from the user's perspective and from the
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70 perspective of time, the engine-centric view is actually closest to
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71 the truth, because anywhere within the event-stream module, you are
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72 still somewhere in a Lisp backtrace, and event-loops are begun by
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73 functions such as `command-loop-1', a Lisp function.
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74
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75 As the Lisp engine is doing its thing, it maintains the state of
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76 the engine primarily in five list-like items, with are:
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77
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78 -- the backtrace list
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79 -- the catchtag list
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80 -- the condition-handler list
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81 -- the specbind list
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82 -- the GCPRO list.
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83
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84 These are described in detail in the next comment.
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85
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86 --ben
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87 */
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88
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89 /* Note that there are five separate lists used to maintain state in
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90 the evaluator. All of them conceptually are stacks (last-in,
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91 first-out). All non-local exits happen ultimately through the
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92 catch/throw mechanism, which uses one of the five lists (the
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93 catchtag list) and records the current state of the others in each
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94 frame of the list (some other information is recorded and restored
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95 as well, such as the current eval depth), so that all the state of
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96 the evaluator is restored properly when a non-local exit occurs.
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97 (Note that the current state of the condition-handler list is not
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98 recorded in the catchtag list. Instead, when a condition-case or
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99 call-with-condition-handler is set up, it installs an
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100 unwind-protect on the specbind list to restore the appropriate
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101 setting for the condition-handler list. During the course of
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102 handling the non-local exit, all entries on the specbind list that
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103 are past the location stored in the catch frame are "unwound"
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104 (i.e. variable bindings are restored and unwind-protects are
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105 executed), so the condition-handler list gets reset properly.
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106
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107 The five lists are
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108
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109 1. The backtrace list, which is chained through `struct backtrace's
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110 declared in the stack frames of various primitives, and keeps
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111 track of all Lisp function call entries and exits.
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112 2. The catchtag list, which is chained through `struct catchtag's
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113 declared in the stack frames of internal_catch and condition_case_1,
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114 and keeps track of information needed to reset the internal state
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115 of the evaluator to the state that was current when the catch or
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116 condition-case were established, in the event of a non-local exit.
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117 3. The condition-handler list, which is a simple Lisp list with new
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118 entries consed onto the front of the list. It records condition-cases
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119 and call-with-condition-handlers established either from C or from
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120 Lisp. Unlike with the other lists (but similar to everything else
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121 of a similar nature in the rest of the C and Lisp code), it takes care
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122 of restoring itself appropriately in the event of a non-local exit
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123 through the use of the unwind-protect mechanism.
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124 4. The specbind list, which is a contiguous array of `struct specbinding's,
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125 expanded as necessary using realloc(). It holds dynamic variable
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126 bindings (the only kind we currently have in ELisp) and unwind-protects.
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127 5. The GCPRO list, which is chained through `struct gcpro's declared in
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128 the stack frames of any functions that need to GC-protect Lisp_Objects
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129 declared on the stack. This is one of the most fragile areas of the
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130 entire scheme -- you must not forget to UNGCPRO at the end of your
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131 function, you must make sure you GCPRO in many circumstances you don't
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132 think you have to, etc. See the internals manual for more information
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133 about this.
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134
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135 --ben
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136 */
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137
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428
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138 #include <config.h>
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139 #include "lisp.h"
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140
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141 #include "commands.h"
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142 #include "backtrace.h"
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143 #include "bytecode.h"
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144 #include "buffer.h"
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872
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145 #include "console-impl.h"
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853
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146 #include "device.h"
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147 #include "frame.h"
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148 #include "lstream.h"
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428
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149 #include "opaque.h"
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853
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150 #include "window.h"
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428
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151
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152 struct backtrace *backtrace_list;
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153
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154 /* Note: you must always fill in all of the fields in a backtrace structure
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155 before pushing them on the backtrace_list. The profiling code depends
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156 on this. */
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157
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158 #define PUSH_BACKTRACE(bt) do { \
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159 (bt).next = backtrace_list; \
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160 backtrace_list = &(bt); \
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161 } while (0)
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162
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163 #define POP_BACKTRACE(bt) do { \
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164 backtrace_list = (bt).next; \
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165 } while (0)
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166
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167 /* Macros for calling subrs with an argument list whose length is only
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168 known at runtime. See EXFUN and DEFUN for similar hackery. */
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169
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170 #define AV_0(av)
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171 #define AV_1(av) av[0]
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172 #define AV_2(av) AV_1(av), av[1]
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173 #define AV_3(av) AV_2(av), av[2]
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174 #define AV_4(av) AV_3(av), av[3]
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175 #define AV_5(av) AV_4(av), av[4]
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176 #define AV_6(av) AV_5(av), av[5]
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177 #define AV_7(av) AV_6(av), av[6]
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178 #define AV_8(av) AV_7(av), av[7]
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179
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180 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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444
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181 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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428
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182
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183 /* If subrs take more than 8 arguments, more cases need to be added
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184 to this switch. (But wait - don't do it - if you really need
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185 a SUBR with more than 8 arguments, use max_args == MANY.
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853
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186 Or better, considering using a property list as one of your args.
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428
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187 See the DEFUN macro in lisp.h) */
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188 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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189 void (*PF_fn)(void) = (void (*)(void)) fn; \
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190 Lisp_Object *PF_av = (av); \
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191 switch (ac) \
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192 { \
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436
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193 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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428
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194 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
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195 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
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196 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
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197 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
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198 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
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199 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
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200 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
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201 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
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202 } \
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203 } while (0)
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204
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205 #define FUNCALL_SUBR(rv, subr, av, ac) \
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206 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
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207
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208
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209 /* This is the list of current catches (and also condition-cases).
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853
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210 This is a stack: the most recent catch is at the head of the list.
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211 The list is threaded through the stack frames of the C functions
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212 that set up the catches; this is similar to the way the GCPRO list
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213 is handled, but different from the condition-handler list (which is
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214 a simple Lisp list) and the specbind stack, which is a contiguous
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215 array of `struct specbinding's, grown (using realloc()) as
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216 necessary. (Note that all four of these lists behave as a stacks.)
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217
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218 Catches are created by declaring a 'struct catchtag' locally,
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219 filling the .TAG field in with the tag, and doing a setjmp() on
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220 .JMP. Fthrow() will store the value passed to it in .VAL and
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221 longjmp() back to .JMP, back to the function that established the
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222 catch. This will always be either internal_catch() (catches
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223 established internally or through `catch') or condition_case_1
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224 (condition-cases established internally or through
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225 `condition-case').
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428
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226
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227 The catchtag also records the current position in the
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228 call stack (stored in BACKTRACE_LIST), the current position
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229 in the specpdl stack (used for variable bindings and
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230 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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231 current position in the GCPRO stack. All of these are
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232 restored by Fthrow().
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853
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233 */
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428
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234
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235 struct catchtag *catchlist;
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236
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853
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237 /* A special tag that can be used internally from C code to catch
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238 every attempt to throw past this level. */
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239 Lisp_Object Vcatch_everything_tag;
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240
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428
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241 Lisp_Object Qautoload, Qmacro, Qexit;
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242 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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243 Lisp_Object Vquit_flag, Vinhibit_quit;
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244 Lisp_Object Qand_rest, Qand_optional;
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245 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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246 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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247 Lisp_Object Qdebugger;
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248 Lisp_Object Qinhibit_quit;
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887
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249 Lisp_Object Qfinalize_list;
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428
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250 Lisp_Object Qrun_hooks;
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251 Lisp_Object Qsetq;
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252 Lisp_Object Qdisplay_warning;
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253 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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254 Lisp_Object Qif;
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255
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853
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256 /* Flags specifying which operations are currently inhibited. */
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257 int inhibit_flags;
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258
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259 /* Buffers, frames, windows, devices, and consoles created since most
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260 recent active
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261 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION).
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262 */
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263 Lisp_Object Vdeletable_permanent_display_objects;
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264
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265 /* Buffers created since most recent active
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266 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */
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267 Lisp_Object Vmodifiable_buffers;
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793
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268
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269 /* Minimum level at which warnings are logged. Below this, they're ignored
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270 entirely -- not even generated. */
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271 Lisp_Object Vlog_warning_minimum_level;
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272
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428
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273 /* Non-nil means record all fset's and provide's, to be undone
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274 if the file being autoloaded is not fully loaded.
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275 They are recorded by being consed onto the front of Vautoload_queue:
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276 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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277 Lisp_Object Vautoload_queue;
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278
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279 /* Current number of specbindings allocated in specpdl. */
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280 int specpdl_size;
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281
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282 /* Pointer to beginning of specpdl. */
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283 struct specbinding *specpdl;
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284
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285 /* Pointer to first unused element in specpdl. */
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286 struct specbinding *specpdl_ptr;
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287
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288 /* specpdl_ptr - specpdl */
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289 int specpdl_depth_counter;
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290
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291 /* Maximum size allowed for specpdl allocation */
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458
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292 Fixnum max_specpdl_size;
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428
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293
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294 /* Depth in Lisp evaluations and function calls. */
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295 static int lisp_eval_depth;
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296
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297 /* Maximum allowed depth in Lisp evaluations and function calls. */
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458
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298 Fixnum max_lisp_eval_depth;
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428
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299
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300 /* Nonzero means enter debugger before next function call */
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301 static int debug_on_next_call;
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302
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303 /* List of conditions (non-nil atom means all) which cause a backtrace
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304 if an error is handled by the command loop's error handler. */
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305 Lisp_Object Vstack_trace_on_error;
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306
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307 /* List of conditions (non-nil atom means all) which enter the debugger
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308 if an error is handled by the command loop's error handler. */
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309 Lisp_Object Vdebug_on_error;
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310
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311 /* List of conditions and regexps specifying error messages which
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312 do not enter the debugger even if Vdebug_on_error says they should. */
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313 Lisp_Object Vdebug_ignored_errors;
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314
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315 /* List of conditions (non-nil atom means all) which cause a backtrace
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316 if any error is signalled. */
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317 Lisp_Object Vstack_trace_on_signal;
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318
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319 /* List of conditions (non-nil atom means all) which enter the debugger
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320 if any error is signalled. */
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321 Lisp_Object Vdebug_on_signal;
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322
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323 /* Nonzero means enter debugger if a quit signal
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324 is handled by the command loop's error handler.
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325
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326 From lisp, this is a boolean variable and may have the values 0 and 1.
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327 But, eval.c temporarily uses the second bit of this variable to indicate
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328 that a critical_quit is in progress. The second bit is reset immediately
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329 after it is processed in signal_call_debugger(). */
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330 int debug_on_quit;
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331
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332 #if 0 /* FSFmacs */
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333 /* entering_debugger is basically equivalent */
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334 /* The value of num_nonmacro_input_chars as of the last time we
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335 started to enter the debugger. If we decide to enter the debugger
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336 again when this is still equal to num_nonmacro_input_chars, then we
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337 know that the debugger itself has an error, and we should just
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338 signal the error instead of entering an infinite loop of debugger
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339 invocations. */
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340 int when_entered_debugger;
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341 #endif
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342
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343 /* Nonzero means we are trying to enter the debugger.
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344 This is to prevent recursive attempts.
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345 Cleared by the debugger calling Fbacktrace */
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346 static int entering_debugger;
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347
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348 /* Function to call to invoke the debugger */
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349 Lisp_Object Vdebugger;
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350
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853
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351 /* List of condition handlers currently in effect.
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352 The elements of this lists were at one point in the past
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353 threaded through the stack frames of Fcondition_case and
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354 related functions, but now are stored separately in a normal
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355 stack. When an error is signaled (by calling Fsignal, below),
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356 this list is searched for an element that applies.
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428
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357
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358 Each element of this list is one of the following:
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359
|
|
853
|
360 -- A list of a handler function and possibly args to pass to the
|
|
|
361 function. This is a handler established with the Lisp primitive
|
|
|
362 `call-with-condition-handler' or related C function
|
|
|
363 call_with_condition_handler():
|
|
|
364
|
|
|
365 If the handler function is an opaque ptr object, it is a handler
|
|
|
366 that was established in C using call_with_condition_handler(),
|
|
|
367 and the contents of the object are a function pointer which takes
|
|
|
368 three arguments, the signal name and signal data (same arguments
|
|
|
369 passed to `signal') and a third Lisp_Object argument, specified
|
|
|
370 in the call to call_with_condition_handler() and stored as the
|
|
|
371 second element of the list containing the handler functionl.
|
|
|
372
|
|
|
373 If the handler function is a regular Lisp_Object, it is a handler
|
|
|
374 that was established using `call-with-condition-handler'.
|
|
|
375 Currently there are no more arguments in the list containing the
|
|
|
376 handler function, and only one argument is passed to the handler
|
|
|
377 function: a cons of the signal name and signal data arguments
|
|
|
378 passed to `signal'.
|
|
|
379
|
|
|
380 -- A list whose car is Qunbound and whose cdr is Qt. This is a
|
|
|
381 special condition-case handler established by C code with
|
|
|
382 condition_case_1(). All errors are trapped; the debugger is not
|
|
|
383 invoked even if `debug-on-error' was set.
|
|
|
384
|
|
|
385 -- A list whose car is Qunbound and whose cdr is Qerror. This is a
|
|
|
386 special condition-case handler established by C code with
|
|
|
387 condition_case_1(). It is like Qt except that the debugger is
|
|
|
388 invoked normally if it is called for.
|
|
|
389
|
|
|
390 -- A list whose car is Qunbound and whose cdr is a list of lists
|
|
|
391 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is
|
|
|
392 a normal `condition-case' handler.
|
|
|
393
|
|
|
394 Note that in all cases *except* the first, there is a corresponding
|
|
|
395 catch, whose TAG is the value of Vcondition_handlers just after the
|
|
|
396 handler data just described is pushed onto it. The reason is that
|
|
|
397 `condition-case' handlers need to throw back to the place where the
|
|
|
398 handler was installed before invoking it, while
|
|
|
399 `call-with-condition-handler' handlers are invoked in the
|
|
|
400 environment that `signal' was invoked in. */
|
|
|
401
|
|
|
402
|
|
428
|
403 static Lisp_Object Vcondition_handlers;
|
|
|
404
|
|
853
|
405 /* I think we should keep this enabled all the time, not just when
|
|
|
406 error checking is enabled, because if one of these puppies pops up,
|
|
|
407 it will trash the stack if not caught, making it that much harder to
|
|
|
408 debug. It doesn't cause speed loss. */
|
|
442
|
409 #define DEFEND_AGAINST_THROW_RECURSION
|
|
|
410
|
|
|
411 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
412 /* Used for error catching purposes by throw_or_bomb_out */
|
|
|
413 static int throw_level;
|
|
442
|
414 #endif
|
|
|
415
|
|
428
|
416
|
|
|
417 /************************************************************************/
|
|
|
418 /* The subr object type */
|
|
|
419 /************************************************************************/
|
|
|
420
|
|
|
421 static void
|
|
|
422 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
423 {
|
|
|
424 Lisp_Subr *subr = XSUBR (obj);
|
|
867
|
425 const CIbyte *header =
|
|
428
|
426 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
|
|
867
|
427 const CIbyte *name = subr_name (subr);
|
|
|
428 const CIbyte *trailer = subr->prompt ? " (interactive)>" : ">";
|
|
428
|
429
|
|
|
430 if (print_readably)
|
|
563
|
431 printing_unreadable_object ("%s%s%s", header, name, trailer);
|
|
428
|
432
|
|
826
|
433 write_c_string (printcharfun, header);
|
|
|
434 write_c_string (printcharfun, name);
|
|
|
435 write_c_string (printcharfun, trailer);
|
|
428
|
436 }
|
|
|
437
|
|
|
438 static const struct lrecord_description subr_description[] = {
|
|
440
|
439 { XD_DOC_STRING, offsetof (Lisp_Subr, doc) },
|
|
428
|
440 { XD_END }
|
|
|
441 };
|
|
|
442
|
|
938
|
443 #ifdef USE_KKCC
|
|
|
444 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
|
|
|
445 1, /*dumpable-flag*/
|
|
|
446 0, print_subr, 0, 0, 0,
|
|
|
447 subr_description,
|
|
|
448 Lisp_Subr);
|
|
|
449 #else /* not USE_KKCC */
|
|
428
|
450 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
|
|
442
|
451 0, print_subr, 0, 0, 0,
|
|
428
|
452 subr_description,
|
|
|
453 Lisp_Subr);
|
|
938
|
454 #endif /* not USE_KKCC */
|
|
428
|
455
|
|
|
456 /************************************************************************/
|
|
|
457 /* Entering the debugger */
|
|
|
458 /************************************************************************/
|
|
|
459
|
|
853
|
460 static Lisp_Object
|
|
|
461 current_warning_level (void)
|
|
|
462 {
|
|
|
463 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL)
|
|
|
464 return Qdebug;
|
|
|
465 else
|
|
|
466 return Qwarning;
|
|
|
467 }
|
|
|
468
|
|
428
|
469 /* Actually call the debugger. ARG is a list of args that will be
|
|
|
470 passed to the debugger function, as follows;
|
|
|
471
|
|
|
472 If due to frame exit, args are `exit' and the value being returned;
|
|
|
473 this function's value will be returned instead of that.
|
|
|
474 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
475 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
476 If due to `eval' entry, one arg, t.
|
|
|
477
|
|
|
478 */
|
|
|
479
|
|
|
480 static Lisp_Object
|
|
|
481 call_debugger_259 (Lisp_Object arg)
|
|
|
482 {
|
|
|
483 return apply1 (Vdebugger, arg);
|
|
|
484 }
|
|
|
485
|
|
|
486 /* Call the debugger, doing some encapsulation. We make sure we have
|
|
|
487 some room on the eval and specpdl stacks, and bind entering_debugger
|
|
|
488 to 1 during this call. This is used to trap errors that may occur
|
|
|
489 when entering the debugger (e.g. the value of `debugger' is invalid),
|
|
|
490 so that the debugger will not be recursively entered if debug-on-error
|
|
|
491 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
|
|
|
492 enter the debugger.) entering_debugger gets reset to 0 as soon
|
|
|
493 as a backtrace is displayed, so that further errors can indeed be
|
|
|
494 handled normally.
|
|
|
495
|
|
|
496 We also establish a catch for 'debugger. If the debugger function
|
|
|
497 throws to this instead of returning a value, it means that the user
|
|
|
498 pressed 'c' (pretend like the debugger was never entered). The
|
|
|
499 function then returns Qunbound. (If the user pressed 'r', for
|
|
|
500 return a value, then the debugger function returns normally with
|
|
|
501 this value.)
|
|
|
502
|
|
|
503 The difference between 'c' and 'r' is as follows:
|
|
|
504
|
|
|
505 debug-on-call:
|
|
|
506 No difference. The call proceeds as normal.
|
|
|
507 debug-on-exit:
|
|
|
508 With 'r', the specified value is returned as the function's
|
|
|
509 return value. With 'c', the value that would normally be
|
|
|
510 returned is returned.
|
|
|
511 signal:
|
|
|
512 With 'r', the specified value is returned as the return
|
|
|
513 value of `signal'. (This is the only time that `signal'
|
|
|
514 can return, instead of making a non-local exit.) With `c',
|
|
|
515 `signal' will continue looking for handlers as if the
|
|
|
516 debugger was never entered, and will probably end up
|
|
|
517 throwing to a handler or to top-level.
|
|
|
518 */
|
|
|
519
|
|
|
520 static Lisp_Object
|
|
|
521 call_debugger (Lisp_Object arg)
|
|
|
522 {
|
|
|
523 int threw;
|
|
|
524 Lisp_Object val;
|
|
|
525 int speccount;
|
|
|
526
|
|
853
|
527 debug_on_next_call = 0;
|
|
|
528
|
|
|
529 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER)
|
|
|
530 {
|
|
|
531 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE))
|
|
|
532 warn_when_safe
|
|
|
533 (Qdebugger, current_warning_level (),
|
|
|
534 "Unable to enter debugger within critical section");
|
|
|
535 return Qunbound;
|
|
|
536 }
|
|
|
537
|
|
428
|
538 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
539 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
540 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
541 max_specpdl_size = specpdl_size + 40;
|
|
853
|
542
|
|
|
543 speccount = internal_bind_int (&entering_debugger, 1);
|
|
|
544 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0);
|
|
428
|
545
|
|
771
|
546 return unbind_to_1 (speccount, ((threw)
|
|
428
|
547 ? Qunbound /* Not returning a value */
|
|
|
548 : val));
|
|
|
549 }
|
|
|
550
|
|
|
551 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
552 with the appropriate args for this. VAL is the exit value that is
|
|
|
553 about to be returned. */
|
|
|
554
|
|
|
555 static Lisp_Object
|
|
|
556 do_debug_on_exit (Lisp_Object val)
|
|
|
557 {
|
|
|
558 /* This is falsified by call_debugger */
|
|
|
559 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
|
560
|
|
|
561 return !UNBOUNDP (v) ? v : val;
|
|
|
562 }
|
|
|
563
|
|
|
564 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
565 with the appropriate args for this. VAL is either t for a call
|
|
|
566 through `eval' or 'lambda for a call through `funcall'.
|
|
|
567
|
|
|
568 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
569 FUNCALL can be defined as
|
|
|
570
|
|
|
571 (defmacro func (fun &rest args)
|
|
|
572 (cons (eval fun) args))
|
|
|
573
|
|
|
574 and should be treated as such.
|
|
|
575 */
|
|
|
576
|
|
|
577 static void
|
|
|
578 do_debug_on_call (Lisp_Object code)
|
|
|
579 {
|
|
|
580 debug_on_next_call = 0;
|
|
|
581 backtrace_list->debug_on_exit = 1;
|
|
|
582 call_debugger (list1 (code));
|
|
|
583 }
|
|
|
584
|
|
|
585 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
586 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
587 and CONDITIONS is the list of error conditions associated with
|
|
|
588 the error being signalled. This returns non-nil if LIST
|
|
|
589 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
590 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
591 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
592 same as one of the symbols in CONDITIONS.) */
|
|
|
593
|
|
|
594 static int
|
|
|
595 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
596 {
|
|
|
597 if (NILP (list))
|
|
|
598 return 0;
|
|
|
599 if (! CONSP (list))
|
|
|
600 return 1;
|
|
|
601
|
|
|
602 while (CONSP (conditions))
|
|
|
603 {
|
|
|
604 Lisp_Object this, tail;
|
|
|
605 this = XCAR (conditions);
|
|
|
606 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
607 if (EQ (XCAR (tail), this))
|
|
|
608 return 1;
|
|
|
609 conditions = XCDR (conditions);
|
|
|
610 }
|
|
|
611 return 0;
|
|
|
612 }
|
|
|
613
|
|
|
614
|
|
|
615 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
616 and described by SIGNAL-DATA, should skip the debugger
|
|
|
617 according to debugger-ignore-errors. */
|
|
|
618
|
|
|
619 static int
|
|
|
620 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
621 {
|
|
|
622 /* This function can GC */
|
|
|
623 Lisp_Object tail;
|
|
|
624 int first_string = 1;
|
|
|
625 Lisp_Object error_message = Qnil;
|
|
|
626
|
|
|
627 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
628 {
|
|
|
629 if (STRINGP (XCAR (tail)))
|
|
|
630 {
|
|
|
631 if (first_string)
|
|
|
632 {
|
|
|
633 error_message = Ferror_message_string (data);
|
|
|
634 first_string = 0;
|
|
|
635 }
|
|
|
636 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
637 return 1;
|
|
|
638 }
|
|
|
639 else
|
|
|
640 {
|
|
|
641 Lisp_Object contail;
|
|
|
642
|
|
|
643 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
644 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
645 return 1;
|
|
|
646 }
|
|
|
647 }
|
|
|
648
|
|
|
649 return 0;
|
|
|
650 }
|
|
|
651
|
|
|
652 /* Actually generate a backtrace on STREAM. */
|
|
|
653
|
|
|
654 static Lisp_Object
|
|
|
655 backtrace_259 (Lisp_Object stream)
|
|
|
656 {
|
|
|
657 return Fbacktrace (stream, Qt);
|
|
|
658 }
|
|
|
659
|
|
|
660 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
|
661 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
662 associated with the error being signalled. SIG is the actual error
|
|
|
663 being signalled, and DATA is the associated data (these are exactly
|
|
|
664 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
665 list of error handlers that are to be put in place while the debugger
|
|
|
666 is called. This is generally the remaining handlers that are
|
|
|
667 outside of the innermost handler trapping this error. This way,
|
|
|
668 if the same error occurs inside of the debugger, you usually don't get
|
|
|
669 the debugger entered recursively.
|
|
|
670
|
|
|
671 This function returns Qunbound if it didn't call the debugger or if
|
|
|
672 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
673 debugger was never entered. Otherwise, it returns the value
|
|
|
674 that the user specified with `r'. (Note that much of the time,
|
|
|
675 the user will abort with C-], and we will never have a chance to
|
|
|
676 return anything at all.)
|
|
|
677
|
|
|
678 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
679 and stack-trace-on-signal to control whether we do anything.
|
|
|
680 This is so that debug-on-error doesn't make handled errors
|
|
|
681 cause the debugger to get invoked.
|
|
|
682
|
|
|
683 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
684 those functions aren't done more than once in a single `signal'
|
|
|
685 session. */
|
|
|
686
|
|
|
687 static Lisp_Object
|
|
|
688 signal_call_debugger (Lisp_Object conditions,
|
|
|
689 Lisp_Object sig, Lisp_Object data,
|
|
|
690 Lisp_Object active_handlers,
|
|
|
691 int signal_vars_only,
|
|
|
692 int *stack_trace_displayed,
|
|
|
693 int *debugger_entered)
|
|
|
694 {
|
|
853
|
695 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
696 /* This function can GC */
|
|
853
|
697 #else /* reality check */
|
|
|
698 /* This function cannot GC because it inhibits GC during its operation */
|
|
|
699 #endif
|
|
|
700
|
|
428
|
701 Lisp_Object val = Qunbound;
|
|
|
702 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
703 Lisp_Object temp_data = Qnil;
|
|
853
|
704 int outer_speccount = specpdl_depth();
|
|
|
705 int speccount;
|
|
|
706
|
|
|
707 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
708 struct gcpro gcpro1, gcpro2;
|
|
|
709 GCPRO2 (all_handlers, temp_data);
|
|
853
|
710 #else
|
|
|
711 begin_gc_forbidden ();
|
|
|
712 #endif
|
|
|
713
|
|
|
714 speccount = specpdl_depth();
|
|
428
|
715
|
|
|
716 Vcondition_handlers = active_handlers;
|
|
|
717
|
|
|
718 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
|
719
|
|
|
720 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
721 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
722 && !skip_debugger (conditions, temp_data))
|
|
|
723 {
|
|
|
724 specbind (Qdebug_on_error, Qnil);
|
|
|
725 specbind (Qstack_trace_on_error, Qnil);
|
|
|
726 specbind (Qdebug_on_signal, Qnil);
|
|
|
727 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
728
|
|
442
|
729 if (!noninteractive)
|
|
|
730 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
731 backtrace_259,
|
|
|
732 Qnil,
|
|
|
733 Qnil);
|
|
|
734 else /* in batch mode, we want this going to stderr. */
|
|
|
735 backtrace_259 (Qnil);
|
|
771
|
736 unbind_to (speccount);
|
|
428
|
737 *stack_trace_displayed = 1;
|
|
|
738 }
|
|
|
739
|
|
|
740 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
741 && (EQ (sig, Qquit)
|
|
|
742 ? debug_on_quit
|
|
|
743 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
744 && !skip_debugger (conditions, temp_data))
|
|
|
745 {
|
|
|
746 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
747 specbind (Qdebug_on_error, Qnil);
|
|
|
748 specbind (Qstack_trace_on_error, Qnil);
|
|
|
749 specbind (Qdebug_on_signal, Qnil);
|
|
|
750 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
751
|
|
|
752 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
853
|
753 unbind_to (speccount);
|
|
428
|
754 *debugger_entered = 1;
|
|
|
755 }
|
|
|
756
|
|
|
757 if (!entering_debugger && !*stack_trace_displayed
|
|
|
758 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
759 {
|
|
|
760 specbind (Qdebug_on_error, Qnil);
|
|
|
761 specbind (Qstack_trace_on_error, Qnil);
|
|
|
762 specbind (Qdebug_on_signal, Qnil);
|
|
|
763 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
764
|
|
442
|
765 if (!noninteractive)
|
|
|
766 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
767 backtrace_259,
|
|
|
768 Qnil,
|
|
|
769 Qnil);
|
|
|
770 else /* in batch mode, we want this going to stderr. */
|
|
|
771 backtrace_259 (Qnil);
|
|
771
|
772 unbind_to (speccount);
|
|
428
|
773 *stack_trace_displayed = 1;
|
|
|
774 }
|
|
|
775
|
|
|
776 if (!entering_debugger && !*debugger_entered
|
|
|
777 && (EQ (sig, Qquit)
|
|
|
778 ? debug_on_quit
|
|
|
779 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
780 {
|
|
|
781 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
782 specbind (Qdebug_on_error, Qnil);
|
|
|
783 specbind (Qstack_trace_on_error, Qnil);
|
|
|
784 specbind (Qdebug_on_signal, Qnil);
|
|
|
785 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
786
|
|
|
787 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
788 *debugger_entered = 1;
|
|
|
789 }
|
|
|
790
|
|
853
|
791 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE
|
|
428
|
792 UNGCPRO;
|
|
853
|
793 #endif
|
|
428
|
794 Vcondition_handlers = all_handlers;
|
|
853
|
795 return unbind_to_1 (outer_speccount, val);
|
|
428
|
796 }
|
|
|
797
|
|
|
798
|
|
|
799 /************************************************************************/
|
|
|
800 /* The basic special forms */
|
|
|
801 /************************************************************************/
|
|
|
802
|
|
|
803 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
804 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
|
805
|
|
|
806 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
|
807 Eval args until one of them yields non-nil, then return that value.
|
|
|
808 The remaining args are not evalled at all.
|
|
|
809 If all args return nil, return nil.
|
|
|
810 */
|
|
|
811 (args))
|
|
|
812 {
|
|
|
813 /* This function can GC */
|
|
442
|
814 REGISTER Lisp_Object val;
|
|
428
|
815
|
|
|
816 LIST_LOOP_2 (arg, args)
|
|
|
817 {
|
|
|
818 if (!NILP (val = Feval (arg)))
|
|
|
819 return val;
|
|
|
820 }
|
|
|
821
|
|
|
822 return Qnil;
|
|
|
823 }
|
|
|
824
|
|
|
825 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
|
826 Eval args until one of them yields nil, then return nil.
|
|
|
827 The remaining args are not evalled at all.
|
|
|
828 If no arg yields nil, return the last arg's value.
|
|
|
829 */
|
|
|
830 (args))
|
|
|
831 {
|
|
|
832 /* This function can GC */
|
|
442
|
833 REGISTER Lisp_Object val = Qt;
|
|
428
|
834
|
|
|
835 LIST_LOOP_2 (arg, args)
|
|
|
836 {
|
|
|
837 if (NILP (val = Feval (arg)))
|
|
|
838 return val;
|
|
|
839 }
|
|
|
840
|
|
|
841 return val;
|
|
|
842 }
|
|
|
843
|
|
|
844 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
|
845 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
846 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
847 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
848 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
|
849 */
|
|
|
850 (args))
|
|
|
851 {
|
|
|
852 /* This function can GC */
|
|
|
853 Lisp_Object condition = XCAR (args);
|
|
|
854 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
855 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
856
|
|
|
857 if (!NILP (Feval (condition)))
|
|
|
858 return Feval (then_form);
|
|
|
859 else
|
|
|
860 return Fprogn (else_forms);
|
|
|
861 }
|
|
|
862
|
|
|
863 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
864 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
865
|
|
|
866 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
867 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
868 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
869 */
|
|
|
870 (int nargs, Lisp_Object *args))
|
|
|
871 {
|
|
|
872 Lisp_Object cond = args[0];
|
|
|
873 Lisp_Object body;
|
|
853
|
874
|
|
428
|
875 switch (nargs)
|
|
|
876 {
|
|
|
877 case 1: body = Qnil; break;
|
|
|
878 case 2: body = args[1]; break;
|
|
|
879 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
880 }
|
|
|
881
|
|
|
882 return list3 (Qif, cond, body);
|
|
|
883 }
|
|
|
884
|
|
|
885 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
886 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
887 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
888 */
|
|
|
889 (int nargs, Lisp_Object *args))
|
|
|
890 {
|
|
|
891 Lisp_Object cond = args[0];
|
|
|
892 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
893 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
|
894 }
|
|
|
895
|
|
|
896 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
444
|
897 \(cond CLAUSES...): try each clause until one succeeds.
|
|
428
|
898 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
899 and, if the value is non-nil, this clause succeeds:
|
|
|
900 then the expressions in BODY are evaluated and the last one's
|
|
|
901 value is the value of the cond-form.
|
|
|
902 If no clause succeeds, cond returns nil.
|
|
|
903 If a clause has one element, as in (CONDITION),
|
|
|
904 CONDITION's value if non-nil is returned from the cond-form.
|
|
|
905 */
|
|
|
906 (args))
|
|
|
907 {
|
|
|
908 /* This function can GC */
|
|
442
|
909 REGISTER Lisp_Object val;
|
|
428
|
910
|
|
|
911 LIST_LOOP_2 (clause, args)
|
|
|
912 {
|
|
|
913 CHECK_CONS (clause);
|
|
|
914 if (!NILP (val = Feval (XCAR (clause))))
|
|
|
915 {
|
|
|
916 if (!NILP (clause = XCDR (clause)))
|
|
|
917 {
|
|
|
918 CHECK_TRUE_LIST (clause);
|
|
|
919 val = Fprogn (clause);
|
|
|
920 }
|
|
|
921 return val;
|
|
|
922 }
|
|
|
923 }
|
|
|
924
|
|
|
925 return Qnil;
|
|
|
926 }
|
|
|
927
|
|
|
928 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
|
929 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
|
930 */
|
|
|
931 (args))
|
|
|
932 {
|
|
|
933 /* This function can GC */
|
|
|
934 /* Caller must provide a true list in ARGS */
|
|
442
|
935 REGISTER Lisp_Object val = Qnil;
|
|
428
|
936 struct gcpro gcpro1;
|
|
|
937
|
|
|
938 GCPRO1 (args);
|
|
|
939
|
|
|
940 {
|
|
|
941 LIST_LOOP_2 (form, args)
|
|
|
942 val = Feval (form);
|
|
|
943 }
|
|
|
944
|
|
|
945 UNGCPRO;
|
|
|
946 return val;
|
|
|
947 }
|
|
|
948
|
|
|
949 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
950 Lisp_Object across calls to Feval(). */
|
|
|
951
|
|
|
952 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
|
953 Similar to `progn', but the value of the first form is returned.
|
|
|
954 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
955 The value of FIRST is saved during evaluation of the remaining args,
|
|
|
956 whose values are discarded.
|
|
|
957 */
|
|
|
958 (args))
|
|
|
959 {
|
|
|
960 /* This function can GC */
|
|
442
|
961 REGISTER Lisp_Object val;
|
|
428
|
962 struct gcpro gcpro1;
|
|
|
963
|
|
|
964 val = Feval (XCAR (args));
|
|
|
965
|
|
|
966 GCPRO1 (val);
|
|
|
967
|
|
|
968 {
|
|
|
969 LIST_LOOP_2 (form, XCDR (args))
|
|
|
970 Feval (form);
|
|
|
971 }
|
|
|
972
|
|
|
973 UNGCPRO;
|
|
|
974 return val;
|
|
|
975 }
|
|
|
976
|
|
|
977 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
|
978 Similar to `progn', but the value of the second form is returned.
|
|
|
979 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
980 The value of SECOND is saved during evaluation of the remaining args,
|
|
|
981 whose values are discarded.
|
|
|
982 */
|
|
|
983 (args))
|
|
|
984 {
|
|
|
985 /* This function can GC */
|
|
442
|
986 REGISTER Lisp_Object val;
|
|
428
|
987 struct gcpro gcpro1;
|
|
|
988
|
|
|
989 Feval (XCAR (args));
|
|
|
990 args = XCDR (args);
|
|
|
991 val = Feval (XCAR (args));
|
|
|
992 args = XCDR (args);
|
|
|
993
|
|
|
994 GCPRO1 (val);
|
|
|
995
|
|
442
|
996 {
|
|
|
997 LIST_LOOP_2 (form, args)
|
|
|
998 Feval (form);
|
|
|
999 }
|
|
428
|
1000
|
|
|
1001 UNGCPRO;
|
|
|
1002 return val;
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
|
1006 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
1007 The value of the last form in BODY is returned.
|
|
|
1008 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
1009 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
1010 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
|
1011 */
|
|
|
1012 (args))
|
|
|
1013 {
|
|
|
1014 /* This function can GC */
|
|
|
1015 Lisp_Object varlist = XCAR (args);
|
|
|
1016 Lisp_Object body = XCDR (args);
|
|
|
1017 int speccount = specpdl_depth();
|
|
|
1018
|
|
|
1019 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
|
1020 {
|
|
|
1021 Lisp_Object symbol, value, tem;
|
|
|
1022 if (SYMBOLP (var))
|
|
|
1023 symbol = var, value = Qnil;
|
|
|
1024 else
|
|
|
1025 {
|
|
|
1026 CHECK_CONS (var);
|
|
|
1027 symbol = XCAR (var);
|
|
|
1028 tem = XCDR (var);
|
|
|
1029 if (NILP (tem))
|
|
|
1030 value = Qnil;
|
|
|
1031 else
|
|
|
1032 {
|
|
|
1033 CHECK_CONS (tem);
|
|
|
1034 value = Feval (XCAR (tem));
|
|
|
1035 if (!NILP (XCDR (tem)))
|
|
563
|
1036 sferror
|
|
428
|
1037 ("`let' bindings can have only one value-form", var);
|
|
|
1038 }
|
|
|
1039 }
|
|
|
1040 specbind (symbol, value);
|
|
|
1041 }
|
|
771
|
1042 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
1043 }
|
|
|
1044
|
|
|
1045 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
|
1046 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
1047 The value of the last form in BODY is returned.
|
|
|
1048 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
1049 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
1050 All the VALUEFORMs are evalled before any symbols are bound.
|
|
|
1051 */
|
|
|
1052 (args))
|
|
|
1053 {
|
|
|
1054 /* This function can GC */
|
|
|
1055 Lisp_Object varlist = XCAR (args);
|
|
|
1056 Lisp_Object body = XCDR (args);
|
|
|
1057 int speccount = specpdl_depth();
|
|
|
1058 Lisp_Object *temps;
|
|
|
1059 int idx;
|
|
|
1060 struct gcpro gcpro1;
|
|
|
1061
|
|
|
1062 /* Make space to hold the values to give the bound variables. */
|
|
|
1063 {
|
|
|
1064 int varcount;
|
|
|
1065 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
|
1066 temps = alloca_array (Lisp_Object, varcount);
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 /* Compute the values and store them in `temps' */
|
|
|
1070 GCPRO1 (*temps);
|
|
|
1071 gcpro1.nvars = 0;
|
|
|
1072
|
|
|
1073 idx = 0;
|
|
442
|
1074 {
|
|
|
1075 LIST_LOOP_2 (var, varlist)
|
|
|
1076 {
|
|
|
1077 Lisp_Object *value = &temps[idx++];
|
|
|
1078 if (SYMBOLP (var))
|
|
|
1079 *value = Qnil;
|
|
|
1080 else
|
|
|
1081 {
|
|
|
1082 Lisp_Object tem;
|
|
|
1083 CHECK_CONS (var);
|
|
|
1084 tem = XCDR (var);
|
|
|
1085 if (NILP (tem))
|
|
|
1086 *value = Qnil;
|
|
|
1087 else
|
|
|
1088 {
|
|
|
1089 CHECK_CONS (tem);
|
|
|
1090 *value = Feval (XCAR (tem));
|
|
|
1091 gcpro1.nvars = idx;
|
|
|
1092
|
|
|
1093 if (!NILP (XCDR (tem)))
|
|
563
|
1094 sferror
|
|
442
|
1095 ("`let' bindings can have only one value-form", var);
|
|
|
1096 }
|
|
|
1097 }
|
|
|
1098 }
|
|
|
1099 }
|
|
428
|
1100
|
|
|
1101 idx = 0;
|
|
442
|
1102 {
|
|
|
1103 LIST_LOOP_2 (var, varlist)
|
|
|
1104 {
|
|
|
1105 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
|
1106 }
|
|
|
1107 }
|
|
428
|
1108
|
|
|
1109 UNGCPRO;
|
|
|
1110
|
|
771
|
1111 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
1112 }
|
|
|
1113
|
|
|
1114 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
|
1115 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
1116 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
1117 until TEST returns nil.
|
|
|
1118 */
|
|
|
1119 (args))
|
|
|
1120 {
|
|
|
1121 /* This function can GC */
|
|
|
1122 Lisp_Object test = XCAR (args);
|
|
|
1123 Lisp_Object body = XCDR (args);
|
|
|
1124
|
|
|
1125 while (!NILP (Feval (test)))
|
|
|
1126 {
|
|
|
1127 QUIT;
|
|
|
1128 Fprogn (body);
|
|
|
1129 }
|
|
|
1130
|
|
|
1131 return Qnil;
|
|
|
1132 }
|
|
|
1133
|
|
|
1134 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
|
1135 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
1136 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
1137 The values VAL are expressions; they are evaluated.
|
|
|
1138 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
1139 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
1140 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
1141 The return value of the `setq' form is the value of the last VAL.
|
|
|
1142 */
|
|
|
1143 (args))
|
|
|
1144 {
|
|
|
1145 /* This function can GC */
|
|
|
1146 Lisp_Object symbol, tail, val = Qnil;
|
|
|
1147 int nargs;
|
|
|
1148 struct gcpro gcpro1;
|
|
|
1149
|
|
|
1150 GET_LIST_LENGTH (args, nargs);
|
|
|
1151
|
|
|
1152 if (nargs & 1) /* Odd number of arguments? */
|
|
|
1153 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
1154
|
|
|
1155 GCPRO1 (val);
|
|
|
1156
|
|
|
1157 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
|
1158 {
|
|
|
1159 val = Feval (val);
|
|
|
1160 Fset (symbol, val);
|
|
|
1161 }
|
|
|
1162
|
|
|
1163 UNGCPRO;
|
|
|
1164 return val;
|
|
|
1165 }
|
|
|
1166
|
|
|
1167 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
|
1168 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
|
1169 */
|
|
|
1170 (args))
|
|
|
1171 {
|
|
|
1172 return XCAR (args);
|
|
|
1173 }
|
|
|
1174
|
|
|
1175 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
|
1176 Like `quote', but preferred for objects which are functions.
|
|
|
1177 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1178 `quote' cannot do that.
|
|
|
1179 */
|
|
|
1180 (args))
|
|
|
1181 {
|
|
|
1182 return XCAR (args);
|
|
|
1183 }
|
|
|
1184
|
|
|
1185
|
|
|
1186 /************************************************************************/
|
|
|
1187 /* Defining functions/variables */
|
|
|
1188 /************************************************************************/
|
|
|
1189 static Lisp_Object
|
|
|
1190 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1191 {
|
|
|
1192 Ffset (name, defn);
|
|
|
1193 LOADHIST_ATTACH (name);
|
|
|
1194 return name;
|
|
|
1195 }
|
|
|
1196
|
|
|
1197 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
|
1198 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1199 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1200 See also the function `interactive'.
|
|
|
1201 */
|
|
|
1202 (args))
|
|
|
1203 {
|
|
|
1204 /* This function can GC */
|
|
|
1205 return define_function (XCAR (args),
|
|
|
1206 Fcons (Qlambda, XCDR (args)));
|
|
|
1207 }
|
|
|
1208
|
|
|
1209 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
|
1210 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1211 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1212 When the macro is called, as in (NAME ARGS...),
|
|
|
1213 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1214 the list ARGS... as it appears in the expression,
|
|
|
1215 and the result should be a form to be evaluated instead of the original.
|
|
|
1216 */
|
|
|
1217 (args))
|
|
|
1218 {
|
|
|
1219 /* This function can GC */
|
|
|
1220 return define_function (XCAR (args),
|
|
|
1221 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
|
1222 }
|
|
|
1223
|
|
|
1224 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
|
1225 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1226 You are not required to define a variable in order to use it,
|
|
|
1227 but the definition can supply documentation and an initial value
|
|
|
1228 in a way that tags can recognize.
|
|
|
1229
|
|
|
1230 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1231 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1232 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1233 void.)
|
|
|
1234 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1235 buffer-local values are not affected.
|
|
|
1236 INITVALUE and DOCSTRING are optional.
|
|
|
1237 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1238 This means that M-x set-variable recognizes it.
|
|
428
|
1239 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1240
|
|
|
1241 In lisp-interaction-mode defvar is treated as defconst.
|
|
|
1242 */
|
|
|
1243 (args))
|
|
|
1244 {
|
|
|
1245 /* This function can GC */
|
|
|
1246 Lisp_Object sym = XCAR (args);
|
|
|
1247
|
|
|
1248 if (!NILP (args = XCDR (args)))
|
|
|
1249 {
|
|
|
1250 Lisp_Object val = XCAR (args);
|
|
|
1251
|
|
|
1252 if (NILP (Fdefault_boundp (sym)))
|
|
|
1253 {
|
|
|
1254 struct gcpro gcpro1;
|
|
|
1255 GCPRO1 (val);
|
|
|
1256 val = Feval (val);
|
|
|
1257 Fset_default (sym, val);
|
|
|
1258 UNGCPRO;
|
|
|
1259 }
|
|
|
1260
|
|
|
1261 if (!NILP (args = XCDR (args)))
|
|
|
1262 {
|
|
|
1263 Lisp_Object doc = XCAR (args);
|
|
|
1264 Fput (sym, Qvariable_documentation, doc);
|
|
|
1265 if (!NILP (args = XCDR (args)))
|
|
563
|
1266 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1267 }
|
|
|
1268 }
|
|
|
1269
|
|
|
1270 #ifdef I18N3
|
|
|
1271 if (!NILP (Vfile_domain))
|
|
|
1272 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1273 #endif
|
|
|
1274
|
|
|
1275 LOADHIST_ATTACH (sym);
|
|
|
1276 return sym;
|
|
|
1277 }
|
|
|
1278
|
|
|
1279 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
|
1280 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1281 variable.
|
|
|
1282 The intent is that programs do not change this value, but users may.
|
|
|
1283 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1284 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1285 buffer-local values are not affected.
|
|
|
1286 DOCSTRING is optional.
|
|
|
1287 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1288 This means that M-x set-variable recognizes it.
|
|
428
|
1289
|
|
|
1290 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1291 normally loaded, since it is useful for users to be able to specify
|
|
|
1292 their own values for such variables before loading the library.
|
|
|
1293 Since `defconst' unconditionally assigns the variable,
|
|
|
1294 it would override the user's choice.
|
|
|
1295 */
|
|
|
1296 (args))
|
|
|
1297 {
|
|
|
1298 /* This function can GC */
|
|
|
1299 Lisp_Object sym = XCAR (args);
|
|
|
1300 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1301 struct gcpro gcpro1;
|
|
|
1302
|
|
|
1303 GCPRO1 (val);
|
|
|
1304
|
|
|
1305 Fset_default (sym, val);
|
|
|
1306
|
|
|
1307 UNGCPRO;
|
|
|
1308
|
|
|
1309 if (!NILP (args = XCDR (args)))
|
|
|
1310 {
|
|
|
1311 Lisp_Object doc = XCAR (args);
|
|
|
1312 Fput (sym, Qvariable_documentation, doc);
|
|
|
1313 if (!NILP (args = XCDR (args)))
|
|
563
|
1314 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1315 }
|
|
|
1316
|
|
|
1317 #ifdef I18N3
|
|
|
1318 if (!NILP (Vfile_domain))
|
|
|
1319 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1320 #endif
|
|
|
1321
|
|
|
1322 LOADHIST_ATTACH (sym);
|
|
|
1323 return sym;
|
|
|
1324 }
|
|
|
1325
|
|
|
1326 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
|
1327 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1328 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1329 Determined by whether the first character of the documentation
|
|
|
1330 for the variable is `*'.
|
|
|
1331 */
|
|
|
1332 (variable))
|
|
|
1333 {
|
|
|
1334 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1335
|
|
|
1336 return
|
|
|
1337 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1338
|
|
|
1339 (STRINGP (documentation) &&
|
|
826
|
1340 (string_byte (documentation, 0) == '*')) ||
|
|
428
|
1341
|
|
|
1342 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1343 (CONSP (documentation)
|
|
|
1344 && STRINGP (XCAR (documentation))
|
|
|
1345 && INTP (XCDR (documentation))
|
|
|
1346 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1347 Qt : Qnil;
|
|
|
1348 }
|
|
|
1349
|
|
|
1350 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
|
1351 Return result of expanding macros at top level of FORM.
|
|
|
1352 If FORM is not a macro call, it is returned unchanged.
|
|
|
1353 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1354 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1355
|
|
442
|
1356 The second optional arg ENVIRONMENT specifies an environment of macro
|
|
428
|
1357 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
|
1358 */
|
|
442
|
1359 (form, environment))
|
|
428
|
1360 {
|
|
|
1361 /* This function can GC */
|
|
|
1362 /* With cleanups from Hallvard Furuseth. */
|
|
|
1363 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1364
|
|
|
1365 while (1)
|
|
|
1366 {
|
|
|
1367 /* Come back here each time we expand a macro call,
|
|
|
1368 in case it expands into another macro call. */
|
|
|
1369 if (!CONSP (form))
|
|
|
1370 break;
|
|
|
1371 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1372 def = sym = XCAR (form);
|
|
|
1373 tem = Qnil;
|
|
|
1374 /* Trace symbols aliases to other symbols
|
|
|
1375 until we get a symbol that is not an alias. */
|
|
|
1376 while (SYMBOLP (def))
|
|
|
1377 {
|
|
|
1378 QUIT;
|
|
|
1379 sym = def;
|
|
442
|
1380 tem = Fassq (sym, environment);
|
|
428
|
1381 if (NILP (tem))
|
|
|
1382 {
|
|
|
1383 def = XSYMBOL (sym)->function;
|
|
|
1384 if (!UNBOUNDP (def))
|
|
|
1385 continue;
|
|
|
1386 }
|
|
|
1387 break;
|
|
|
1388 }
|
|
442
|
1389 /* Right now TEM is the result from SYM in ENVIRONMENT,
|
|
428
|
1390 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1391 if (NILP (tem))
|
|
|
1392 {
|
|
442
|
1393 /* SYM is not mentioned in ENVIRONMENT.
|
|
428
|
1394 Look at its function definition. */
|
|
|
1395 if (UNBOUNDP (def)
|
|
|
1396 || !CONSP (def))
|
|
|
1397 /* Not defined or definition not suitable */
|
|
|
1398 break;
|
|
|
1399 if (EQ (XCAR (def), Qautoload))
|
|
|
1400 {
|
|
|
1401 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1402 tem = Felt (def, make_int (4));
|
|
|
1403 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1404 {
|
|
|
1405 /* Yes, load it and try again. */
|
|
970
|
1406 /* do_autoload GCPROs both arguments */
|
|
428
|
1407 do_autoload (def, sym);
|
|
|
1408 continue;
|
|
|
1409 }
|
|
|
1410 else
|
|
|
1411 break;
|
|
|
1412 }
|
|
|
1413 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1414 break;
|
|
|
1415 else expander = XCDR (def);
|
|
|
1416 }
|
|
|
1417 else
|
|
|
1418 {
|
|
|
1419 expander = XCDR (tem);
|
|
|
1420 if (NILP (expander))
|
|
|
1421 break;
|
|
|
1422 }
|
|
|
1423 form = apply1 (expander, XCDR (form));
|
|
|
1424 }
|
|
|
1425 return form;
|
|
|
1426 }
|
|
|
1427
|
|
|
1428
|
|
|
1429 /************************************************************************/
|
|
|
1430 /* Non-local exits */
|
|
|
1431 /************************************************************************/
|
|
|
1432
|
|
|
1433 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1434 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1435 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1436 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1437 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1438 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1439 */
|
|
|
1440 (args))
|
|
|
1441 {
|
|
|
1442 /* This function can GC */
|
|
|
1443 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1444 Lisp_Object body = XCDR (args);
|
|
853
|
1445 return internal_catch (tag, Fprogn, body, 0, 0);
|
|
428
|
1446 }
|
|
|
1447
|
|
|
1448 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1449 FUNC should return a Lisp_Object.
|
|
|
1450 This is how catches are done from within C code. */
|
|
|
1451
|
|
|
1452 Lisp_Object
|
|
|
1453 internal_catch (Lisp_Object tag,
|
|
|
1454 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1455 Lisp_Object arg,
|
|
853
|
1456 int * volatile threw,
|
|
|
1457 Lisp_Object * volatile thrown_tag)
|
|
428
|
1458 {
|
|
|
1459 /* This structure is made part of the chain `catchlist'. */
|
|
|
1460 struct catchtag c;
|
|
|
1461
|
|
|
1462 /* Fill in the components of c, and put it on the list. */
|
|
|
1463 c.next = catchlist;
|
|
|
1464 c.tag = tag;
|
|
853
|
1465 c.actual_tag = Qnil;
|
|
428
|
1466 c.val = Qnil;
|
|
|
1467 c.backlist = backtrace_list;
|
|
|
1468 #if 0 /* FSFmacs */
|
|
|
1469 /* #### */
|
|
|
1470 c.handlerlist = handlerlist;
|
|
|
1471 #endif
|
|
|
1472 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1473 c.pdlcount = specpdl_depth();
|
|
|
1474 #if 0 /* FSFmacs */
|
|
|
1475 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1476 #endif
|
|
|
1477 c.gcpro = gcprolist;
|
|
|
1478 catchlist = &c;
|
|
|
1479
|
|
|
1480 /* Call FUNC. */
|
|
|
1481 if (SETJMP (c.jmp))
|
|
|
1482 {
|
|
|
1483 /* Throw works by a longjmp that comes right here. */
|
|
|
1484 if (threw) *threw = 1;
|
|
853
|
1485 if (thrown_tag) *thrown_tag = c.actual_tag;
|
|
428
|
1486 return c.val;
|
|
|
1487 }
|
|
|
1488 c.val = (*func) (arg);
|
|
|
1489 if (threw) *threw = 0;
|
|
853
|
1490 if (thrown_tag) *thrown_tag = Qnil;
|
|
428
|
1491 catchlist = c.next;
|
|
853
|
1492 check_catchlist_sanity ();
|
|
428
|
1493 return c.val;
|
|
|
1494 }
|
|
|
1495
|
|
|
1496
|
|
|
1497 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1498 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1499
|
|
|
1500 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1501 they choose the catch tag to throw to. A catch tag for a
|
|
|
1502 condition-case form has a TAG of Qnil.
|
|
|
1503
|
|
|
1504 Before each catch is discarded, unbind all special bindings and
|
|
|
1505 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1506 the handler stack as we go, so that the proper handlers are in
|
|
|
1507 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1508 some static info saved in CATCH, and longjmp to the location
|
|
|
1509 specified in the
|
|
|
1510
|
|
|
1511 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1512
|
|
|
1513 static void
|
|
853
|
1514 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag)
|
|
428
|
1515 {
|
|
|
1516 REGISTER int last_time;
|
|
|
1517
|
|
|
1518 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1519 Before each catch is discarded, unbind all special bindings
|
|
|
1520 and execute all unwind-protect clauses made above that catch.
|
|
|
1521 At the end, restore some static info saved in CATCH,
|
|
|
1522 and longjmp to the location specified.
|
|
|
1523 */
|
|
|
1524
|
|
|
1525 /* Save the value somewhere it will be GC'ed.
|
|
|
1526 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1527 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1528 c->val = val;
|
|
853
|
1529 c->actual_tag = tag;
|
|
428
|
1530
|
|
|
1531 #if 0 /* FSFmacs */
|
|
|
1532 /* Restore the polling-suppression count. */
|
|
|
1533 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1534 #endif
|
|
|
1535
|
|
617
|
1536 #if 1
|
|
428
|
1537 do
|
|
|
1538 {
|
|
|
1539 last_time = catchlist == c;
|
|
|
1540
|
|
|
1541 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1542 handlers. */
|
|
771
|
1543 unbind_to (catchlist->pdlcount);
|
|
428
|
1544 catchlist = catchlist->next;
|
|
853
|
1545 check_catchlist_sanity ();
|
|
428
|
1546 }
|
|
|
1547 while (! last_time);
|
|
617
|
1548 #else
|
|
|
1549 /* Former XEmacs code. This is definitely not as correct because
|
|
|
1550 there may be a number of catches we're unwinding, and a number
|
|
|
1551 of unwind-protects in the process. By not undoing the catches till
|
|
|
1552 the end, there may be invalid catches still current. (This would
|
|
|
1553 be a particular problem with code like this:
|
|
|
1554
|
|
|
1555 (catch 'foo
|
|
|
1556 (call-some-code-which-does...
|
|
|
1557 (catch 'bar
|
|
|
1558 (unwind-protect
|
|
|
1559 (call-some-code-which-does...
|
|
|
1560 (catch 'bar
|
|
|
1561 (call-some-code-which-does...
|
|
|
1562 (throw 'foo nil))))
|
|
|
1563 (throw 'bar nil)))))
|
|
|
1564
|
|
|
1565 This would try to throw to the inner (catch 'bar)!
|
|
|
1566
|
|
|
1567 --ben
|
|
|
1568 */
|
|
428
|
1569 /* Unwind the specpdl stack */
|
|
771
|
1570 unbind_to (c->pdlcount);
|
|
428
|
1571 catchlist = c->next;
|
|
853
|
1572 check_catchlist_sanity ();
|
|
617
|
1573 #endif /* Former code */
|
|
428
|
1574
|
|
|
1575 gcprolist = c->gcpro;
|
|
|
1576 backtrace_list = c->backlist;
|
|
|
1577 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1578
|
|
442
|
1579 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1580 throw_level = 0;
|
|
|
1581 #endif
|
|
|
1582 LONGJMP (c->jmp, 1);
|
|
|
1583 }
|
|
|
1584
|
|
|
1585 static DOESNT_RETURN
|
|
|
1586 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1587 Lisp_Object sig, Lisp_Object data)
|
|
|
1588 {
|
|
442
|
1589 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1590 /* die if we recurse more than is reasonable */
|
|
|
1591 if (++throw_level > 20)
|
|
793
|
1592 abort ();
|
|
428
|
1593 #endif
|
|
|
1594
|
|
|
1595 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1596 "last resort" when there is no handler for this error and
|
|
|
1597 the debugger couldn't be invoked, so we are throwing to
|
|
|
1598 'top-level. If this tag doesn't exist (happens during the
|
|
|
1599 initialization stages) we would get in an infinite recursive
|
|
|
1600 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1601 really-early-error-handler.
|
|
|
1602
|
|
|
1603 Note that in fact the only time that the "last resort"
|
|
|
1604 occurs is when there's no catch for 'top-level -- the
|
|
|
1605 'top-level catch and the catch-all error handler are
|
|
|
1606 established at the same time, in initial_command_loop/
|
|
|
1607 top_level_1.
|
|
|
1608
|
|
853
|
1609 [[#### Fix this horrifitude!]]
|
|
|
1610
|
|
|
1611 I don't think this is horrifitude, just defensive programming. --ben
|
|
428
|
1612 */
|
|
|
1613
|
|
|
1614 while (1)
|
|
|
1615 {
|
|
|
1616 REGISTER struct catchtag *c;
|
|
|
1617
|
|
|
1618 #if 0 /* FSFmacs */
|
|
|
1619 if (!NILP (tag)) /* #### */
|
|
|
1620 #endif
|
|
|
1621 for (c = catchlist; c; c = c->next)
|
|
|
1622 {
|
|
853
|
1623 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag))
|
|
|
1624 unwind_to_catch (c, val, tag);
|
|
428
|
1625 }
|
|
|
1626 if (!bomb_out_p)
|
|
|
1627 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1628 else
|
|
|
1629 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1630 }
|
|
|
1631
|
|
|
1632 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1633 /* throw_level--; */
|
|
|
1634 /* getting tired of compilation warnings */
|
|
|
1635 /* return Qnil; */
|
|
|
1636 }
|
|
|
1637
|
|
|
1638 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1639 Fthrow() works.
|
|
|
1640
|
|
|
1641 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1642 back to the appropriate condition-case handler after (maybe)
|
|
|
1643 the debugger is entered. In that case, TAG is the value
|
|
|
1644 of Vcondition_handlers that was in place just after the
|
|
|
1645 condition-case handler was set up. The car of this will be
|
|
|
1646 some data referring to the handler: Its car will be Qunbound
|
|
|
1647 (thus, this tag can never be generated by Lisp code), and
|
|
|
1648 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1649 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1650 This works fine because Fthrow() does not care what TAG was
|
|
|
1651 passed to it: it just looks up the catch list for something
|
|
|
1652 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1653 back to the place that established the catch (in this case,
|
|
|
1654 condition_case_1). See below for more info.
|
|
|
1655 */
|
|
|
1656
|
|
|
1657 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
444
|
1658 Throw to the catch for TAG and return VALUE from it.
|
|
428
|
1659 Both TAG and VALUE are evalled.
|
|
|
1660 */
|
|
444
|
1661 (tag, value))
|
|
|
1662 {
|
|
|
1663 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */
|
|
428
|
1664 return Qnil;
|
|
|
1665 }
|
|
|
1666
|
|
|
1667 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1668 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1669 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1670 If BODYFORM completes normally, its value is returned
|
|
|
1671 after executing the UNWINDFORMS.
|
|
|
1672 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1673 */
|
|
|
1674 (args))
|
|
|
1675 {
|
|
|
1676 /* This function can GC */
|
|
|
1677 int speccount = specpdl_depth();
|
|
|
1678
|
|
|
1679 record_unwind_protect (Fprogn, XCDR (args));
|
|
771
|
1680 return unbind_to_1 (speccount, Feval (XCAR (args)));
|
|
428
|
1681 }
|
|
|
1682
|
|
|
1683
|
|
|
1684 /************************************************************************/
|
|
|
1685 /* Signalling and trapping errors */
|
|
|
1686 /************************************************************************/
|
|
|
1687
|
|
|
1688 static Lisp_Object
|
|
|
1689 condition_bind_unwind (Lisp_Object loser)
|
|
|
1690 {
|
|
617
|
1691 /* There is no problem freeing stuff here like there is in
|
|
|
1692 condition_case_unwind(), because there are no outside pointers
|
|
|
1693 (like the tag below in the catchlist) pointing to the objects. */
|
|
853
|
1694
|
|
428
|
1695 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1696 Lisp_Object tem = XCAR (loser);
|
|
853
|
1697 int first = 1;
|
|
428
|
1698
|
|
|
1699 while (CONSP (tem))
|
|
|
1700 {
|
|
853
|
1701 Lisp_Object victim = tem;
|
|
|
1702 if (first && OPAQUE_PTRP (XCAR (victim)))
|
|
|
1703 free_opaque_ptr (XCAR (victim));
|
|
|
1704 first = 0;
|
|
|
1705 tem = XCDR (victim);
|
|
428
|
1706 free_cons (victim);
|
|
|
1707 }
|
|
|
1708
|
|
|
1709 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
853
|
1710 Vcondition_handlers = XCDR (loser);
|
|
|
1711
|
|
|
1712 free_cons (loser);
|
|
428
|
1713 return Qnil;
|
|
|
1714 }
|
|
|
1715
|
|
|
1716 static Lisp_Object
|
|
|
1717 condition_case_unwind (Lisp_Object loser)
|
|
|
1718 {
|
|
|
1719 /* ((<unbound> . clauses) ... other handlers */
|
|
617
|
1720 /* NO! Doing this now leaves the tag deleted in a still-active
|
|
|
1721 catch. With the recent changes to unwind_to_catch(), the
|
|
|
1722 evil situation might not happen any more; it certainly could
|
|
|
1723 happen before because it did. But it's very precarious to rely
|
|
|
1724 on something like this. #### Instead we should rewrite, adopting
|
|
|
1725 the FSF's mechanism with a struct handler instead of
|
|
|
1726 Vcondition_handlers; then we have NO Lisp-object structures used
|
|
|
1727 to hold all of the values, and there's no possibility either of
|
|
|
1728 crashes from freeing objects too quickly, or objects not getting
|
|
|
1729 freed and hanging around till the next GC.
|
|
|
1730
|
|
|
1731 In practice, the extra consing here should not matter because
|
|
|
1732 it only happens when we throw past the condition-case, which almost
|
|
|
1733 always is the result of an error. Most of the time, there will be
|
|
|
1734 no error, and we will free the objects below in the main function.
|
|
|
1735
|
|
|
1736 --ben
|
|
|
1737
|
|
|
1738 DO NOT DO: free_cons (XCAR (loser));
|
|
|
1739 */
|
|
|
1740
|
|
428
|
1741 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
617
|
1742 Vcondition_handlers = XCDR (loser);
|
|
|
1743
|
|
|
1744 /* DO NOT DO: free_cons (loser); */
|
|
428
|
1745 return Qnil;
|
|
|
1746 }
|
|
|
1747
|
|
|
1748 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1749 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1750
|
|
|
1751 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1752 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1753 HANDLERS as something to be caught, the return value of this
|
|
|
1754 function is the return value from BFUN. If such an error does
|
|
|
1755 occur, HFUN is called, and its return value becomes the
|
|
|
1756 return value of condition_case_1(). The second argument passed
|
|
|
1757 to HFUN will always be HARG. The first argument depends on
|
|
|
1758 HANDLERS:
|
|
|
1759
|
|
|
1760 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1761 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1762 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1763 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1764 `debug-on-error' was set.
|
|
|
1765
|
|
|
1766 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1767 debugger is invoked if `debug-on-error' was set.
|
|
|
1768
|
|
|
1769 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1770 exactly as in `condition-case', and errors will be trapped
|
|
|
1771 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1772 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1773 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1774
|
|
|
1775 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1776 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1777 for why), establishes a catch whose tag is this new value of
|
|
|
1778 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1779 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1780 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1781 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1782 jump point we just established, and we in turn just call the
|
|
|
1783 HFUN and return its value.
|
|
|
1784
|
|
|
1785 For a real condition-case, HFUN will always be
|
|
|
1786 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1787 to condition-case. That function just binds VAR to the cons
|
|
|
1788 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1789 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1790 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1791 it had *before* condition_case_1() was called. This maintains
|
|
|
1792 consistency (so that the state of things at exit of
|
|
|
1793 condition_case_1() is the same as at entry), and implies
|
|
|
1794 that the handler can signal the same error again (possibly
|
|
|
1795 after processing of its own), without getting in an infinite
|
|
|
1796 loop. */
|
|
|
1797
|
|
|
1798 Lisp_Object
|
|
|
1799 condition_case_1 (Lisp_Object handlers,
|
|
|
1800 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1801 Lisp_Object barg,
|
|
|
1802 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1803 Lisp_Object harg)
|
|
|
1804 {
|
|
|
1805 int speccount = specpdl_depth();
|
|
|
1806 struct catchtag c;
|
|
617
|
1807 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
428
|
1808
|
|
|
1809 #if 0 /* FSFmacs */
|
|
|
1810 c.tag = Qnil;
|
|
|
1811 #else
|
|
|
1812 /* Do consing now so out-of-memory error happens up front */
|
|
|
1813 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1814 which is known specially by Fsignal.
|
|
617
|
1815 [[ This is an abomination, but to fix it would require either
|
|
428
|
1816 making condition_case cons (a union of the conditions of the clauses)
|
|
617
|
1817 or changing the byte-compiler output (no thanks).]]
|
|
|
1818
|
|
|
1819 The above comment is clearly wrong. FSF does not do it this way
|
|
|
1820 and did not change the byte-compiler output. Instead they use a
|
|
|
1821 `struct handler' to hold the various values (in place of our
|
|
|
1822 Vcondition_handlers) and chain them together, with pointers from
|
|
|
1823 the `struct catchtag' to the `struct handler'. We should perhaps
|
|
|
1824 consider moving to something similar, but not before I merge my
|
|
|
1825 stderr-proc workspace, which contains changes to these
|
|
|
1826 functions. --ben */
|
|
428
|
1827 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1828 Vcondition_handlers);
|
|
|
1829 #endif
|
|
|
1830 c.val = Qnil;
|
|
853
|
1831 c.actual_tag = Qnil;
|
|
428
|
1832 c.backlist = backtrace_list;
|
|
|
1833 #if 0 /* FSFmacs */
|
|
|
1834 /* #### */
|
|
|
1835 c.handlerlist = handlerlist;
|
|
|
1836 #endif
|
|
|
1837 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1838 c.pdlcount = specpdl_depth();
|
|
|
1839 #if 0 /* FSFmacs */
|
|
|
1840 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1841 #endif
|
|
|
1842 c.gcpro = gcprolist;
|
|
|
1843 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1844 c.next = catchlist;
|
|
|
1845
|
|
|
1846 if (SETJMP (c.jmp))
|
|
|
1847 {
|
|
|
1848 /* throw does ungcpro, etc */
|
|
|
1849 return (*hfun) (c.val, harg);
|
|
|
1850 }
|
|
|
1851
|
|
|
1852 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1853
|
|
|
1854 catchlist = &c;
|
|
|
1855 #if 0 /* FSFmacs */
|
|
|
1856 h.handler = handlers;
|
|
|
1857 h.var = Qnil;
|
|
|
1858 h.next = handlerlist;
|
|
|
1859 h.tag = &c;
|
|
|
1860 handlerlist = &h;
|
|
|
1861 #else
|
|
|
1862 Vcondition_handlers = c.tag;
|
|
|
1863 #endif
|
|
|
1864 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1865 c.val = ((*bfun) (barg));
|
|
|
1866 UNGCPRO;
|
|
617
|
1867
|
|
|
1868 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */
|
|
|
1869 GCPRO3 (harg, c.val, c.tag);
|
|
|
1870
|
|
428
|
1871 catchlist = c.next;
|
|
853
|
1872 check_catchlist_sanity ();
|
|
617
|
1873 /* Note: The unbind also resets Vcondition_handlers. Maybe we should
|
|
|
1874 delete this here. */
|
|
428
|
1875 Vcondition_handlers = XCDR (c.tag);
|
|
771
|
1876 unbind_to (speccount);
|
|
617
|
1877
|
|
|
1878 UNGCPRO;
|
|
|
1879 /* free the conses *after* the unbind, because the unbind will run
|
|
|
1880 condition_case_unwind above. */
|
|
853
|
1881 free_cons (XCAR (c.tag));
|
|
|
1882 free_cons (c.tag);
|
|
617
|
1883 return c.val;
|
|
428
|
1884 }
|
|
|
1885
|
|
|
1886 static Lisp_Object
|
|
|
1887 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1888 {
|
|
|
1889 /* This function can GC */
|
|
|
1890 #if 0 /* FSFmacs */
|
|
|
1891 if (!NILP (h.var))
|
|
|
1892 specbind (h.var, c.val);
|
|
|
1893 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1894
|
|
|
1895 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1896 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1897 throwing. */
|
|
771
|
1898 unbind_to (c.pdlcount);
|
|
428
|
1899 return val;
|
|
|
1900 #else
|
|
|
1901 int speccount;
|
|
|
1902
|
|
|
1903 CHECK_TRUE_LIST (val);
|
|
|
1904 if (NILP (var))
|
|
|
1905 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1906
|
|
|
1907 speccount = specpdl_depth();
|
|
|
1908 specbind (var, Fcar (val));
|
|
|
1909 val = Fprogn (Fcdr (val));
|
|
771
|
1910 return unbind_to_1 (speccount, val);
|
|
428
|
1911 #endif
|
|
|
1912 }
|
|
|
1913
|
|
|
1914 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1915 condition-case except that it takes three arguments rather
|
|
|
1916 than a single list of arguments. */
|
|
|
1917 Lisp_Object
|
|
|
1918 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1919 {
|
|
|
1920 /* This function can GC */
|
|
|
1921 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1922 {
|
|
|
1923 if (NILP (handler))
|
|
|
1924 ;
|
|
|
1925 else if (CONSP (handler))
|
|
|
1926 {
|
|
|
1927 Lisp_Object conditions = XCAR (handler);
|
|
|
1928 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1929 if (SYMBOLP (conditions))
|
|
|
1930 ;
|
|
|
1931 else
|
|
|
1932 {
|
|
|
1933 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1934 if (!SYMBOLP (condition))
|
|
|
1935 goto invalid_condition_handler;
|
|
|
1936 }
|
|
|
1937 }
|
|
|
1938 else
|
|
|
1939 {
|
|
|
1940 invalid_condition_handler:
|
|
563
|
1941 sferror ("Invalid condition handler", handler);
|
|
428
|
1942 }
|
|
|
1943 }
|
|
|
1944
|
|
|
1945 CHECK_SYMBOL (var);
|
|
|
1946
|
|
|
1947 return condition_case_1 (handlers,
|
|
|
1948 Feval, bodyform,
|
|
|
1949 run_condition_case_handlers,
|
|
|
1950 var);
|
|
|
1951 }
|
|
|
1952
|
|
|
1953 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
1954 Regain control when an error is signalled.
|
|
|
1955 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1956 Executes BODYFORM and returns its value if no error happens.
|
|
|
1957 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1958 where the BODY is made of Lisp expressions.
|
|
|
1959
|
|
771
|
1960 A typical usage of `condition-case' looks like this:
|
|
|
1961
|
|
|
1962 (condition-case nil
|
|
|
1963 ;; you need a progn here if you want more than one statement ...
|
|
|
1964 (progn
|
|
|
1965 (do-something)
|
|
|
1966 (do-something-else))
|
|
|
1967 (error
|
|
|
1968 (issue-warning-or)
|
|
|
1969 ;; but strangely, you don't need one here.
|
|
|
1970 (return-a-value-etc)
|
|
|
1971 ))
|
|
|
1972
|
|
428
|
1973 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1974 error's condition names. If an error happens, the first applicable
|
|
|
1975 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1976 all errors, even those without the `error' condition name on them
|
|
|
1977 \(e.g. `quit').
|
|
|
1978
|
|
|
1979 The car of a handler may be a list of condition names
|
|
|
1980 instead of a single condition name.
|
|
|
1981
|
|
|
1982 When a handler handles an error,
|
|
|
1983 control returns to the condition-case and the handler BODY... is executed
|
|
|
1984 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1985 VAR may be nil; then you do not get access to the signal information.
|
|
|
1986
|
|
|
1987 The value of the last BODY form is returned from the condition-case.
|
|
|
1988 See also the function `signal' for more info.
|
|
|
1989
|
|
|
1990 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1991 and the current catches, condition-cases, and bindings have all been
|
|
|
1992 popped back to the state they were in just before the call to
|
|
|
1993 `condition-case'. This means that resignalling the error from
|
|
|
1994 within the handler will not result in an infinite loop.
|
|
|
1995
|
|
|
1996 If you want to establish an error handler that is called with the
|
|
|
1997 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1998 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
1999 */
|
|
|
2000 (args))
|
|
|
2001 {
|
|
|
2002 /* This function can GC */
|
|
|
2003 Lisp_Object var = XCAR (args);
|
|
|
2004 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
2005 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
2006 return condition_case_3 (bodyform, var, handlers);
|
|
|
2007 }
|
|
|
2008
|
|
|
2009 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
2010 Regain control when an error is signalled, without popping the stack.
|
|
|
2011 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
2012 This function is similar to `condition-case', but the handler is invoked
|
|
|
2013 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
2014 that was current when `signal' was called, rather than when the handler
|
|
|
2015 was established.
|
|
|
2016
|
|
|
2017 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
2018 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
2019 `signal' is called (this differs from `condition-case', which allows
|
|
|
2020 you to specify which errors are trapped). If the handler function
|
|
|
2021 returns, `signal' continues as if the handler were never invoked.
|
|
|
2022 \(It continues to look for handlers established earlier than this one,
|
|
|
2023 and invokes the standard error-handler if none is found.)
|
|
|
2024 */
|
|
|
2025 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
2026 {
|
|
|
2027 /* This function can GC */
|
|
|
2028 int speccount = specpdl_depth();
|
|
|
2029 Lisp_Object tem;
|
|
|
2030
|
|
853
|
2031 tem = Ffunction_max_args (args[0]);
|
|
|
2032 if (! (XINT (Ffunction_min_args (args[0])) <= 1
|
|
|
2033 && (NILP (tem) || 1 <= XINT (tem))))
|
|
|
2034 invalid_argument ("Must be function of one argument", args[0]);
|
|
|
2035
|
|
|
2036 /* (handler-fun . handler-args) but currently there are no handler-args */
|
|
428
|
2037 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
2038 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2039 Vcondition_handlers = tem;
|
|
|
2040
|
|
|
2041 /* Caller should have GC-protected args */
|
|
771
|
2042 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1));
|
|
428
|
2043 }
|
|
|
2044
|
|
853
|
2045 /* This is the C version of the above function. It calls FUN, passing it
|
|
|
2046 ARG, first setting up HANDLER to catch signals in the environment in
|
|
|
2047 which they were signalled. (HANDLER is only invoked if there was no
|
|
|
2048 handler (either from condition-case or call-with-condition-handler) set
|
|
|
2049 later on that handled the signal; therefore, this is a real error.
|
|
|
2050
|
|
|
2051 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as
|
|
|
2052 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and
|
|
|
2053 ARG be void * to facilitate passing structures, but I changed to
|
|
|
2054 Lisp_Objects because all the other C interfaces to catch/condition-case/etc.
|
|
|
2055 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al.
|
|
|
2056 to convert between Lisp_Objects and structure pointers. */
|
|
|
2057
|
|
|
2058 Lisp_Object
|
|
|
2059 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object,
|
|
|
2060 Lisp_Object),
|
|
|
2061 Lisp_Object handler_arg,
|
|
|
2062 Lisp_Object (*fun) (Lisp_Object),
|
|
|
2063 Lisp_Object arg)
|
|
|
2064 {
|
|
|
2065 /* This function can GC */
|
|
1111
|
2066 int speccount = specpdl_depth ();
|
|
853
|
2067 Lisp_Object tem;
|
|
|
2068
|
|
|
2069 /* ((handler-fun . (handler-arg . nil)) ... ) */
|
|
1111
|
2070 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler),
|
|
853
|
2071 noseeum_cons (handler_arg, Qnil)),
|
|
|
2072 Vcondition_handlers);
|
|
|
2073 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2074 Vcondition_handlers = tem;
|
|
|
2075
|
|
|
2076 return unbind_to_1 (speccount, (*fun) (arg));
|
|
|
2077 }
|
|
|
2078
|
|
428
|
2079 static int
|
|
|
2080 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
2081 {
|
|
|
2082 if (EQ (type, Qt))
|
|
|
2083 /* (condition-case c # (t c)) catches -all- signals
|
|
|
2084 * Use with caution! */
|
|
|
2085 return 1;
|
|
|
2086
|
|
|
2087 if (SYMBOLP (type))
|
|
|
2088 return !NILP (Fmemq (type, conditions));
|
|
|
2089
|
|
|
2090 for (; CONSP (type); type = XCDR (type))
|
|
|
2091 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
2092 return 1;
|
|
|
2093
|
|
|
2094 return 0;
|
|
|
2095 }
|
|
|
2096
|
|
|
2097 static Lisp_Object
|
|
|
2098 return_from_signal (Lisp_Object value)
|
|
|
2099 {
|
|
|
2100 #if 1
|
|
|
2101 /* Most callers are not prepared to handle gc if this
|
|
|
2102 returns. So, since this feature is not very useful,
|
|
|
2103 take it out. */
|
|
|
2104 /* Have called debugger; return value to signaller */
|
|
|
2105 return value;
|
|
|
2106 #else /* But the reality is that that stinks, because: */
|
|
|
2107 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
2108 to be continuable!! */
|
|
563
|
2109 signal_error (Qunimplemented,
|
|
|
2110 "Returning a value from an error is no longer supported",
|
|
|
2111 Qunbound);
|
|
428
|
2112 #endif
|
|
|
2113 }
|
|
|
2114
|
|
|
2115 extern int in_display;
|
|
|
2116
|
|
|
2117
|
|
|
2118 /************************************************************************/
|
|
|
2119 /* the workhorse error-signaling function */
|
|
|
2120 /************************************************************************/
|
|
|
2121
|
|
853
|
2122 /* This exists only for debugging purposes, as a place to put a breakpoint
|
|
|
2123 that won't get signalled for errors occurring when
|
|
|
2124 call_with_suspended_errors() was invoked. */
|
|
|
2125
|
|
872
|
2126 /* Don't make static or it might be compiled away */
|
|
|
2127 void signal_1 (void);
|
|
|
2128
|
|
|
2129 void
|
|
853
|
2130 signal_1 (void)
|
|
|
2131 {
|
|
|
2132 }
|
|
|
2133
|
|
428
|
2134 /* #### This function has not been synched with FSF. It diverges
|
|
|
2135 significantly. */
|
|
|
2136
|
|
853
|
2137 /* The simplest external error function: it would be called
|
|
|
2138 signal_continuable_error() in the terminology below, but it's
|
|
|
2139 Lisp-callable. */
|
|
|
2140
|
|
|
2141 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2142 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2143 An error symbol is a symbol defined using `define-error'.
|
|
|
2144 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2145 If the signal is handled, DATA is made available to the handler.
|
|
|
2146 See also the function `signal-error', and the functions to handle errors:
|
|
|
2147 `condition-case' and `call-with-condition-handler'.
|
|
|
2148
|
|
|
2149 Note that this function can return, if the debugger is invoked and the
|
|
|
2150 user invokes the "return from signal" option.
|
|
|
2151 */
|
|
|
2152 (error_symbol, data))
|
|
428
|
2153 {
|
|
|
2154 /* This function can GC */
|
|
853
|
2155 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2156 Lisp_Object conditions = Qnil;
|
|
|
2157 Lisp_Object handlers = Qnil;
|
|
428
|
2158 /* signal_call_debugger() could get called more than once
|
|
|
2159 (once when a call-with-condition-handler is about to
|
|
|
2160 be dealt with, and another when a condition-case handler
|
|
|
2161 is about to be invoked). So make sure the debugger and/or
|
|
|
2162 stack trace aren't done more than once. */
|
|
|
2163 int stack_trace_displayed = 0;
|
|
|
2164 int debugger_entered = 0;
|
|
853
|
2165
|
|
|
2166 /* Fsignal() is one of these functions that's called all the time
|
|
|
2167 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2168 protect the objects because all sorts of weird stuff could
|
|
|
2169 happen. */
|
|
|
2170
|
|
|
2171 GCPRO4 (conditions, handlers, error_symbol, data);
|
|
|
2172
|
|
|
2173 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS))
|
|
|
2174 signal_1 ();
|
|
428
|
2175
|
|
|
2176 if (!initialized)
|
|
|
2177 {
|
|
|
2178 /* who knows how much has been initialized? Safest bet is
|
|
|
2179 just to bomb out immediately. */
|
|
771
|
2180 stderr_out ("Error before initialization is complete!\n");
|
|
428
|
2181 abort ();
|
|
|
2182 }
|
|
|
2183
|
|
853
|
2184 if (gc_in_progress)
|
|
|
2185 /* We used to abort if in_display:
|
|
|
2186
|
|
|
2187 [[This is one of many reasons why you can't run lisp code from
|
|
|
2188 redisplay. There is no sensible way to handle errors there.]]
|
|
|
2189
|
|
|
2190 The above comment is not correct.
|
|
|
2191
|
|
|
2192 Inhibit GC until the redisplay code is careful enough to properly
|
|
|
2193 GCPRO their structures;
|
|
|
2194
|
|
|
2195 Surround all calls to Lisp code with error-trapping wrappers that
|
|
|
2196 catch all errors. --ben */
|
|
428
|
2197 abort ();
|
|
|
2198
|
|
853
|
2199 conditions = Fget (error_symbol, Qerror_conditions, Qnil);
|
|
428
|
2200
|
|
|
2201 for (handlers = Vcondition_handlers;
|
|
|
2202 CONSP (handlers);
|
|
|
2203 handlers = XCDR (handlers))
|
|
|
2204 {
|
|
|
2205 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
2206 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
2207 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
2208
|
|
|
2209 if (!UNBOUNDP (handler_fun))
|
|
|
2210 {
|
|
|
2211 /* call-with-condition-handler */
|
|
|
2212 Lisp_Object tem;
|
|
|
2213 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
2214 struct gcpro ngcpro1;
|
|
|
2215 NGCPRO1 (all_handlers);
|
|
|
2216 Vcondition_handlers = outer_handlers;
|
|
|
2217
|
|
853
|
2218 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2219 outer_handlers, 1,
|
|
|
2220 &stack_trace_displayed,
|
|
|
2221 &debugger_entered);
|
|
|
2222 if (!UNBOUNDP (tem))
|
|
|
2223 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
2224
|
|
853
|
2225 if (OPAQUE_PTRP (handler_fun))
|
|
|
2226 {
|
|
|
2227 if (NILP (handler_data))
|
|
|
2228 {
|
|
|
2229 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) =
|
|
|
2230 (Lisp_Object (*) (Lisp_Object, Lisp_Object))
|
|
|
2231 (get_opaque_ptr (handler_fun));
|
|
|
2232
|
|
|
2233 tem = (*hfun) (error_symbol, data);
|
|
|
2234 }
|
|
|
2235 else
|
|
|
2236 {
|
|
|
2237 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) =
|
|
|
2238 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object))
|
|
|
2239 (get_opaque_ptr (handler_fun));
|
|
|
2240
|
|
|
2241 assert (NILP (XCDR (handler_data)));
|
|
|
2242 tem = (*hfun) (error_symbol, data, XCAR (handler_data));
|
|
|
2243 }
|
|
|
2244 }
|
|
|
2245 else
|
|
|
2246 {
|
|
|
2247 tem = Fcons (error_symbol, data);
|
|
|
2248 if (NILP (handler_data))
|
|
|
2249 tem = call1 (handler_fun, tem);
|
|
|
2250 else
|
|
|
2251 {
|
|
|
2252 /* (This code won't be used (for now?).) */
|
|
|
2253 struct gcpro nngcpro1;
|
|
|
2254 Lisp_Object args[3];
|
|
|
2255 NNGCPRO1 (args[0]);
|
|
|
2256 nngcpro1.nvars = 3;
|
|
|
2257 args[0] = handler_fun;
|
|
|
2258 args[1] = tem;
|
|
|
2259 args[2] = handler_data;
|
|
|
2260 nngcpro1.var = args;
|
|
|
2261 tem = Fapply (3, args);
|
|
|
2262 NNUNGCPRO;
|
|
|
2263 }
|
|
|
2264 }
|
|
428
|
2265 NUNGCPRO;
|
|
|
2266 #if 0
|
|
|
2267 if (!EQ (tem, Qsignal))
|
|
|
2268 return return_from_signal (tem);
|
|
|
2269 #endif
|
|
|
2270 /* If handler didn't throw, try another handler */
|
|
|
2271 Vcondition_handlers = all_handlers;
|
|
|
2272 }
|
|
|
2273
|
|
|
2274 /* It's a condition-case handler */
|
|
|
2275
|
|
|
2276 /* t is used by handlers for all conditions, set up by C code.
|
|
|
2277 * debugger is not called even if debug_on_error */
|
|
|
2278 else if (EQ (handler_data, Qt))
|
|
|
2279 {
|
|
|
2280 UNGCPRO;
|
|
853
|
2281 return Fthrow (handlers, Fcons (error_symbol, data));
|
|
428
|
2282 }
|
|
|
2283 /* `error' is used similarly to the way `t' is used, but in
|
|
|
2284 addition it invokes the debugger if debug_on_error.
|
|
|
2285 This is normally used for the outer command-loop error
|
|
|
2286 handler. */
|
|
|
2287 else if (EQ (handler_data, Qerror))
|
|
|
2288 {
|
|
853
|
2289 Lisp_Object tem = signal_call_debugger (conditions, error_symbol,
|
|
|
2290 data,
|
|
428
|
2291 outer_handlers, 0,
|
|
|
2292 &stack_trace_displayed,
|
|
|
2293 &debugger_entered);
|
|
|
2294
|
|
|
2295 UNGCPRO;
|
|
|
2296 if (!UNBOUNDP (tem))
|
|
|
2297 return return_from_signal (tem);
|
|
|
2298
|
|
853
|
2299 tem = Fcons (error_symbol, data);
|
|
428
|
2300 return Fthrow (handlers, tem);
|
|
|
2301 }
|
|
|
2302 else
|
|
|
2303 {
|
|
|
2304 /* handler established by real (Lisp) condition-case */
|
|
|
2305 Lisp_Object h;
|
|
|
2306
|
|
|
2307 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
2308 {
|
|
|
2309 Lisp_Object clause = Fcar (h);
|
|
|
2310 Lisp_Object tem = Fcar (clause);
|
|
|
2311
|
|
|
2312 if (condition_type_p (tem, conditions))
|
|
|
2313 {
|
|
853
|
2314 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2315 outer_handlers, 1,
|
|
|
2316 &stack_trace_displayed,
|
|
|
2317 &debugger_entered);
|
|
|
2318 UNGCPRO;
|
|
|
2319 if (!UNBOUNDP (tem))
|
|
|
2320 return return_from_signal (tem);
|
|
|
2321
|
|
|
2322 /* Doesn't return */
|
|
853
|
2323 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause));
|
|
428
|
2324 return Fthrow (handlers, tem);
|
|
|
2325 }
|
|
|
2326 }
|
|
|
2327 }
|
|
|
2328 }
|
|
|
2329
|
|
|
2330 /* If no handler is present now, try to run the debugger,
|
|
|
2331 and if that fails, throw to top level.
|
|
|
2332
|
|
|
2333 #### The only time that no handler is present is during
|
|
|
2334 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
2335 there is no 'top-level catch. (That's why the
|
|
|
2336 "bomb-out" hack was added.)
|
|
|
2337
|
|
853
|
2338 [[#### Fix this horrifitude!]]
|
|
|
2339
|
|
|
2340 I don't think this is horrifitude, but just defensive coding. --ben */
|
|
|
2341
|
|
|
2342 signal_call_debugger (conditions, error_symbol, data, Qnil, 0,
|
|
428
|
2343 &stack_trace_displayed,
|
|
|
2344 &debugger_entered);
|
|
|
2345 UNGCPRO;
|
|
853
|
2346 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol,
|
|
|
2347 data); /* Doesn't return */
|
|
428
|
2348 return Qnil;
|
|
|
2349 }
|
|
|
2350
|
|
|
2351 /****************** Error functions class 1 ******************/
|
|
|
2352
|
|
|
2353 /* Class 1: General functions that signal an error.
|
|
|
2354 These functions take an error type and a list of associated error
|
|
|
2355 data. */
|
|
|
2356
|
|
853
|
2357 /* No signal_continuable_error_1(); it's called Fsignal(). */
|
|
428
|
2358
|
|
|
2359 /* Signal a non-continuable error. */
|
|
|
2360
|
|
|
2361 DOESNT_RETURN
|
|
563
|
2362 signal_error_1 (Lisp_Object sig, Lisp_Object data)
|
|
428
|
2363 {
|
|
|
2364 for (;;)
|
|
|
2365 Fsignal (sig, data);
|
|
|
2366 }
|
|
853
|
2367
|
|
|
2368 #ifdef ERROR_CHECK_CATCH
|
|
|
2369
|
|
|
2370 void
|
|
|
2371 check_catchlist_sanity (void)
|
|
|
2372 {
|
|
|
2373 #if 0
|
|
|
2374 /* vou me tomar no cu! i just masked andy's missing-unbind
|
|
|
2375 bug! */
|
|
442
|
2376 struct catchtag *c;
|
|
|
2377 int found_error_tag = 0;
|
|
|
2378
|
|
|
2379 for (c = catchlist; c; c = c->next)
|
|
|
2380 {
|
|
|
2381 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2382 {
|
|
|
2383 found_error_tag = 1;
|
|
|
2384 break;
|
|
|
2385 }
|
|
|
2386 }
|
|
|
2387
|
|
|
2388 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
853
|
2389 #endif /* vou me tomar no cul */
|
|
|
2390 }
|
|
|
2391
|
|
|
2392 void
|
|
|
2393 check_specbind_stack_sanity (void)
|
|
|
2394 {
|
|
|
2395 }
|
|
|
2396
|
|
|
2397 #endif /* ERROR_CHECK_CATCH */
|
|
428
|
2398
|
|
|
2399 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2400 according to ERRB. CLASS is the class of warning and should
|
|
|
2401 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2402 Qresource, etc.). */
|
|
|
2403
|
|
|
2404 void
|
|
563
|
2405 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
578
|
2406 Error_Behavior errb)
|
|
428
|
2407 {
|
|
|
2408 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2409 return;
|
|
793
|
2410 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
2411 warn_when_safe_lispobj (class, Qdebug, Fcons (sig, data));
|
|
428
|
2412 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2413 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2414 else
|
|
|
2415 for (;;)
|
|
|
2416 Fsignal (sig, data);
|
|
|
2417 }
|
|
|
2418
|
|
|
2419 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2420 according to ERRB. */
|
|
|
2421
|
|
|
2422 Lisp_Object
|
|
563
|
2423 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data,
|
|
578
|
2424 Lisp_Object class, Error_Behavior errb)
|
|
428
|
2425 {
|
|
|
2426 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2427 return Qnil;
|
|
793
|
2428 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
2429 {
|
|
|
2430 warn_when_safe_lispobj (class, Qdebug, Fcons (sig, data));
|
|
|
2431 return Qnil;
|
|
|
2432 }
|
|
428
|
2433 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2434 {
|
|
|
2435 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2436 return Qnil;
|
|
|
2437 }
|
|
|
2438 else
|
|
|
2439 return Fsignal (sig, data);
|
|
|
2440 }
|
|
|
2441
|
|
|
2442
|
|
|
2443 /****************** Error functions class 2 ******************/
|
|
|
2444
|
|
563
|
2445 /* Class 2: Signal an error with a string and an associated object.
|
|
|
2446 Normally these functions are used to attach one associated object,
|
|
|
2447 but to attach no objects, specify Qunbound for FROB, and for more
|
|
|
2448 than one object, make a list of the objects with Qunbound as the
|
|
|
2449 first element. (If you have specifically two objects to attach,
|
|
|
2450 consider using the function in class 3 below.) These functions
|
|
|
2451 signal an error of a specified type, whose data is one or more
|
|
|
2452 objects (usually two), a string the related Lisp object(s)
|
|
|
2453 specified as FROB. */
|
|
|
2454
|
|
|
2455 /* Out of REASON and FROB, return a list of elements suitable for passing
|
|
|
2456 to signal_error_1(). */
|
|
|
2457
|
|
|
2458 Lisp_Object
|
|
867
|
2459 build_error_data (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2460 {
|
|
|
2461 if (EQ (frob, Qunbound))
|
|
|
2462 frob = Qnil;
|
|
|
2463 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound))
|
|
|
2464 frob = XCDR (frob);
|
|
|
2465 else
|
|
|
2466 frob = list1 (frob);
|
|
|
2467 if (!reason)
|
|
|
2468 return frob;
|
|
|
2469 else
|
|
771
|
2470 return Fcons (build_msg_string (reason), frob);
|
|
563
|
2471 }
|
|
|
2472
|
|
|
2473 DOESNT_RETURN
|
|
867
|
2474 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2475 {
|
|
|
2476 signal_error_1 (type, build_error_data (reason, frob));
|
|
|
2477 }
|
|
|
2478
|
|
|
2479 void
|
|
867
|
2480 maybe_signal_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2481 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2482 Error_Behavior errb)
|
|
563
|
2483 {
|
|
|
2484 /* Optimization: */
|
|
|
2485 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2486 return;
|
|
|
2487 maybe_signal_error_1 (type, build_error_data (reason, frob), class, errb);
|
|
|
2488 }
|
|
|
2489
|
|
|
2490 Lisp_Object
|
|
867
|
2491 signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2492 Lisp_Object frob)
|
|
|
2493 {
|
|
|
2494 return Fsignal (type, build_error_data (reason, frob));
|
|
|
2495 }
|
|
|
2496
|
|
|
2497 Lisp_Object
|
|
867
|
2498 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2499 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2500 Error_Behavior errb)
|
|
563
|
2501 {
|
|
|
2502 /* Optimization: */
|
|
|
2503 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2504 return Qnil;
|
|
|
2505 return maybe_signal_continuable_error_1 (type,
|
|
|
2506 build_error_data (reason, frob),
|
|
|
2507 class, errb);
|
|
|
2508 }
|
|
|
2509
|
|
|
2510
|
|
|
2511 /****************** Error functions class 3 ******************/
|
|
|
2512
|
|
|
2513 /* Class 3: Signal an error with a string and two associated objects.
|
|
|
2514 These functions signal an error of a specified type, whose data
|
|
|
2515 is three objects, a string and two related Lisp objects.
|
|
|
2516 (The equivalent could be accomplished using the class 2 functions,
|
|
|
2517 but these are more convenient in this particular case.) */
|
|
|
2518
|
|
|
2519 DOESNT_RETURN
|
|
867
|
2520 signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2521 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2522 {
|
|
771
|
2523 signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2524 frob1));
|
|
|
2525 }
|
|
|
2526
|
|
|
2527 void
|
|
867
|
2528 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2529 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2530 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2531 {
|
|
|
2532 /* Optimization: */
|
|
|
2533 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2534 return;
|
|
771
|
2535 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2536 frob1), class, errb);
|
|
|
2537 }
|
|
|
2538
|
|
|
2539 Lisp_Object
|
|
867
|
2540 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2541 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2542 {
|
|
771
|
2543 return Fsignal (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2544 frob1));
|
|
|
2545 }
|
|
|
2546
|
|
|
2547 Lisp_Object
|
|
867
|
2548 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2549 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2550 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2551 {
|
|
|
2552 /* Optimization: */
|
|
|
2553 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2554 return Qnil;
|
|
|
2555 return maybe_signal_continuable_error_1
|
|
771
|
2556 (type, list3 (build_msg_string (reason), frob0, frob1),
|
|
563
|
2557 class, errb);
|
|
|
2558 }
|
|
|
2559
|
|
|
2560
|
|
|
2561 /****************** Error functions class 4 ******************/
|
|
|
2562
|
|
|
2563 /* Class 4: Printf-like functions that signal an error.
|
|
442
|
2564 These functions signal an error of a specified type, whose data
|
|
428
|
2565 is a single string, created using the arguments. */
|
|
|
2566
|
|
|
2567 DOESNT_RETURN
|
|
867
|
2568 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
442
|
2569 {
|
|
|
2570 Lisp_Object obj;
|
|
|
2571 va_list args;
|
|
|
2572
|
|
|
2573 va_start (args, fmt);
|
|
771
|
2574 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2575 va_end (args);
|
|
|
2576
|
|
|
2577 /* Fsignal GC-protects its args */
|
|
563
|
2578 signal_error (type, 0, obj);
|
|
442
|
2579 }
|
|
|
2580
|
|
|
2581 void
|
|
578
|
2582 maybe_signal_ferror (Lisp_Object type, Lisp_Object class, Error_Behavior errb,
|
|
867
|
2583 const CIbyte *fmt, ...)
|
|
442
|
2584 {
|
|
|
2585 Lisp_Object obj;
|
|
|
2586 va_list args;
|
|
|
2587
|
|
|
2588 /* Optimization: */
|
|
|
2589 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2590 return;
|
|
|
2591
|
|
|
2592 va_start (args, fmt);
|
|
771
|
2593 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2594 va_end (args);
|
|
|
2595
|
|
|
2596 /* Fsignal GC-protects its args */
|
|
563
|
2597 maybe_signal_error (type, 0, obj, class, errb);
|
|
442
|
2598 }
|
|
|
2599
|
|
|
2600 Lisp_Object
|
|
867
|
2601 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
428
|
2602 {
|
|
|
2603 Lisp_Object obj;
|
|
|
2604 va_list args;
|
|
|
2605
|
|
|
2606 va_start (args, fmt);
|
|
771
|
2607 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2608 va_end (args);
|
|
|
2609
|
|
|
2610 /* Fsignal GC-protects its args */
|
|
|
2611 return Fsignal (type, list1 (obj));
|
|
|
2612 }
|
|
|
2613
|
|
|
2614 Lisp_Object
|
|
563
|
2615 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class,
|
|
867
|
2616 Error_Behavior errb, const CIbyte *fmt, ...)
|
|
442
|
2617 {
|
|
|
2618 Lisp_Object obj;
|
|
|
2619 va_list args;
|
|
|
2620
|
|
|
2621 /* Optimization: */
|
|
|
2622 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2623 return Qnil;
|
|
|
2624
|
|
|
2625 va_start (args, fmt);
|
|
771
|
2626 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2627 va_end (args);
|
|
|
2628
|
|
|
2629 /* Fsignal GC-protects its args */
|
|
563
|
2630 return maybe_signal_continuable_error (type, 0, obj, class, errb);
|
|
442
|
2631 }
|
|
|
2632
|
|
|
2633
|
|
|
2634 /****************** Error functions class 5 ******************/
|
|
|
2635
|
|
563
|
2636 /* Class 5: Printf-like functions that signal an error.
|
|
442
|
2637 These functions signal an error of a specified type, whose data
|
|
563
|
2638 is a one or more objects, a string (created using the arguments)
|
|
|
2639 and additional Lisp objects specified in FROB. (The syntax of FROB
|
|
|
2640 is the same as for class 2.)
|
|
|
2641
|
|
|
2642 There is no need for a class 6 because you can always attach 2
|
|
|
2643 objects using class 5 (for FROB, specify a list with three
|
|
|
2644 elements, the first of which is Qunbound), and these functions are
|
|
|
2645 not commonly used.
|
|
|
2646 */
|
|
442
|
2647
|
|
|
2648 DOESNT_RETURN
|
|
867
|
2649 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt,
|
|
563
|
2650 ...)
|
|
442
|
2651 {
|
|
|
2652 Lisp_Object obj;
|
|
|
2653 va_list args;
|
|
|
2654
|
|
|
2655 va_start (args, fmt);
|
|
771
|
2656 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2657 va_end (args);
|
|
|
2658
|
|
|
2659 /* Fsignal GC-protects its args */
|
|
563
|
2660 signal_error_1 (type, Fcons (obj, build_error_data (0, frob)));
|
|
442
|
2661 }
|
|
|
2662
|
|
|
2663 void
|
|
563
|
2664 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
578
|
2665 Lisp_Object class, Error_Behavior errb,
|
|
867
|
2666 const CIbyte *fmt, ...)
|
|
442
|
2667 {
|
|
|
2668 Lisp_Object obj;
|
|
|
2669 va_list args;
|
|
|
2670
|
|
|
2671 /* Optimization: */
|
|
|
2672 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2673 return;
|
|
|
2674
|
|
|
2675 va_start (args, fmt);
|
|
771
|
2676 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2677 va_end (args);
|
|
|
2678
|
|
|
2679 /* Fsignal GC-protects its args */
|
|
563
|
2680 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class,
|
|
|
2681 errb);
|
|
428
|
2682 }
|
|
|
2683
|
|
|
2684 Lisp_Object
|
|
563
|
2685 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
867
|
2686 const CIbyte *fmt, ...)
|
|
428
|
2687 {
|
|
|
2688 Lisp_Object obj;
|
|
|
2689 va_list args;
|
|
|
2690
|
|
|
2691 va_start (args, fmt);
|
|
771
|
2692 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2693 va_end (args);
|
|
|
2694
|
|
|
2695 /* Fsignal GC-protects its args */
|
|
563
|
2696 return Fsignal (type, Fcons (obj, build_error_data (0, frob)));
|
|
428
|
2697 }
|
|
|
2698
|
|
|
2699 Lisp_Object
|
|
563
|
2700 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2701 Lisp_Object class,
|
|
578
|
2702 Error_Behavior errb,
|
|
867
|
2703 const CIbyte *fmt, ...)
|
|
428
|
2704 {
|
|
|
2705 Lisp_Object obj;
|
|
|
2706 va_list args;
|
|
|
2707
|
|
|
2708 /* Optimization: */
|
|
|
2709 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2710 return Qnil;
|
|
|
2711
|
|
|
2712 va_start (args, fmt);
|
|
771
|
2713 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2714 va_end (args);
|
|
|
2715
|
|
|
2716 /* Fsignal GC-protects its args */
|
|
563
|
2717 return maybe_signal_continuable_error_1 (type,
|
|
|
2718 Fcons (obj,
|
|
|
2719 build_error_data (0, frob)),
|
|
|
2720 class, errb);
|
|
428
|
2721 }
|
|
|
2722
|
|
|
2723
|
|
|
2724 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2725 void
|
|
|
2726 signal_quit (void)
|
|
|
2727 {
|
|
853
|
2728 /* This function cannot GC. GC is prohibited because most callers do
|
|
|
2729 not expect GC occurring in QUIT. Remove this if/when that gets fixed.
|
|
|
2730 --ben */
|
|
|
2731
|
|
|
2732 int count;
|
|
|
2733
|
|
428
|
2734 if (EQ (Vquit_flag, Qcritical))
|
|
|
2735 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2736 Vquit_flag = Qnil;
|
|
853
|
2737 count = begin_gc_forbidden ();
|
|
428
|
2738 /* note that this is continuable. */
|
|
|
2739 Fsignal (Qquit, Qnil);
|
|
853
|
2740 unbind_to (count);
|
|
428
|
2741 }
|
|
|
2742
|
|
|
2743
|
|
563
|
2744 /************************ convenience error functions ***********************/
|
|
|
2745
|
|
436
|
2746 Lisp_Object
|
|
428
|
2747 signal_void_function_error (Lisp_Object function)
|
|
|
2748 {
|
|
436
|
2749 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2750 }
|
|
|
2751
|
|
436
|
2752 Lisp_Object
|
|
428
|
2753 signal_invalid_function_error (Lisp_Object function)
|
|
|
2754 {
|
|
436
|
2755 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2756 }
|
|
|
2757
|
|
436
|
2758 Lisp_Object
|
|
428
|
2759 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2760 {
|
|
436
|
2761 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2762 list2 (function, make_int (nargs)));
|
|
428
|
2763 }
|
|
|
2764
|
|
|
2765 /* Used in list traversal macros for efficiency. */
|
|
436
|
2766 DOESNT_RETURN
|
|
428
|
2767 signal_malformed_list_error (Lisp_Object list)
|
|
|
2768 {
|
|
563
|
2769 signal_error (Qmalformed_list, 0, list);
|
|
428
|
2770 }
|
|
|
2771
|
|
436
|
2772 DOESNT_RETURN
|
|
428
|
2773 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2774 {
|
|
563
|
2775 signal_error (Qmalformed_property_list, 0, list);
|
|
428
|
2776 }
|
|
|
2777
|
|
436
|
2778 DOESNT_RETURN
|
|
428
|
2779 signal_circular_list_error (Lisp_Object list)
|
|
|
2780 {
|
|
563
|
2781 signal_error (Qcircular_list, 0, list);
|
|
428
|
2782 }
|
|
|
2783
|
|
436
|
2784 DOESNT_RETURN
|
|
428
|
2785 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2786 {
|
|
563
|
2787 signal_error (Qcircular_property_list, 0, list);
|
|
428
|
2788 }
|
|
442
|
2789
|
|
|
2790 DOESNT_RETURN
|
|
867
|
2791 syntax_error (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2792 {
|
|
563
|
2793 signal_error (Qsyntax_error, reason, frob);
|
|
442
|
2794 }
|
|
|
2795
|
|
|
2796 DOESNT_RETURN
|
|
867
|
2797 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2798 {
|
|
563
|
2799 signal_error_2 (Qsyntax_error, reason, frob1, frob2);
|
|
|
2800 }
|
|
|
2801
|
|
|
2802 void
|
|
867
|
2803 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2804 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2805 {
|
|
|
2806 maybe_signal_error (Qsyntax_error, reason, frob, class, errb);
|
|
|
2807 }
|
|
|
2808
|
|
|
2809 DOESNT_RETURN
|
|
867
|
2810 sferror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2811 {
|
|
|
2812 signal_error (Qstructure_formation_error, reason, frob);
|
|
|
2813 }
|
|
|
2814
|
|
|
2815 DOESNT_RETURN
|
|
867
|
2816 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2817 {
|
|
|
2818 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2);
|
|
|
2819 }
|
|
|
2820
|
|
|
2821 void
|
|
867
|
2822 maybe_sferror (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2823 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2824 {
|
|
|
2825 maybe_signal_error (Qstructure_formation_error, reason, frob, class, errb);
|
|
442
|
2826 }
|
|
|
2827
|
|
|
2828 DOESNT_RETURN
|
|
867
|
2829 invalid_argument (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2830 {
|
|
563
|
2831 signal_error (Qinvalid_argument, reason, frob);
|
|
442
|
2832 }
|
|
|
2833
|
|
|
2834 DOESNT_RETURN
|
|
867
|
2835 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2836 Lisp_Object frob2)
|
|
442
|
2837 {
|
|
563
|
2838 signal_error_2 (Qinvalid_argument, reason, frob1, frob2);
|
|
|
2839 }
|
|
|
2840
|
|
|
2841 void
|
|
867
|
2842 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2843 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2844 {
|
|
|
2845 maybe_signal_error (Qinvalid_argument, reason, frob, class, errb);
|
|
|
2846 }
|
|
|
2847
|
|
|
2848 DOESNT_RETURN
|
|
867
|
2849 invalid_constant (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2850 {
|
|
|
2851 signal_error (Qinvalid_constant, reason, frob);
|
|
|
2852 }
|
|
|
2853
|
|
|
2854 DOESNT_RETURN
|
|
867
|
2855 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2856 Lisp_Object frob2)
|
|
563
|
2857 {
|
|
|
2858 signal_error_2 (Qinvalid_constant, reason, frob1, frob2);
|
|
|
2859 }
|
|
|
2860
|
|
|
2861 void
|
|
867
|
2862 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2863 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2864 {
|
|
|
2865 maybe_signal_error (Qinvalid_constant, reason, frob, class, errb);
|
|
442
|
2866 }
|
|
|
2867
|
|
|
2868 DOESNT_RETURN
|
|
867
|
2869 invalid_operation (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2870 {
|
|
563
|
2871 signal_error (Qinvalid_operation, reason, frob);
|
|
442
|
2872 }
|
|
|
2873
|
|
|
2874 DOESNT_RETURN
|
|
867
|
2875 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2876 Lisp_Object frob2)
|
|
442
|
2877 {
|
|
563
|
2878 signal_error_2 (Qinvalid_operation, reason, frob1, frob2);
|
|
|
2879 }
|
|
|
2880
|
|
|
2881 void
|
|
867
|
2882 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2883 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2884 {
|
|
|
2885 maybe_signal_error (Qinvalid_operation, reason, frob, class, errb);
|
|
442
|
2886 }
|
|
|
2887
|
|
|
2888 DOESNT_RETURN
|
|
867
|
2889 invalid_change (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2890 {
|
|
563
|
2891 signal_error (Qinvalid_change, reason, frob);
|
|
442
|
2892 }
|
|
|
2893
|
|
|
2894 DOESNT_RETURN
|
|
867
|
2895 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2896 {
|
|
563
|
2897 signal_error_2 (Qinvalid_change, reason, frob1, frob2);
|
|
|
2898 }
|
|
|
2899
|
|
|
2900 void
|
|
867
|
2901 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2902 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2903 {
|
|
|
2904 maybe_signal_error (Qinvalid_change, reason, frob, class, errb);
|
|
|
2905 }
|
|
|
2906
|
|
|
2907 DOESNT_RETURN
|
|
867
|
2908 invalid_state (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2909 {
|
|
|
2910 signal_error (Qinvalid_state, reason, frob);
|
|
|
2911 }
|
|
|
2912
|
|
|
2913 DOESNT_RETURN
|
|
867
|
2914 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2915 {
|
|
|
2916 signal_error_2 (Qinvalid_state, reason, frob1, frob2);
|
|
|
2917 }
|
|
|
2918
|
|
|
2919 void
|
|
867
|
2920 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2921 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2922 {
|
|
|
2923 maybe_signal_error (Qinvalid_state, reason, frob, class, errb);
|
|
|
2924 }
|
|
|
2925
|
|
|
2926 DOESNT_RETURN
|
|
867
|
2927 wtaerror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2928 {
|
|
|
2929 signal_error (Qwrong_type_argument, reason, frob);
|
|
|
2930 }
|
|
|
2931
|
|
|
2932 DOESNT_RETURN
|
|
867
|
2933 stack_overflow (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2934 {
|
|
|
2935 signal_error (Qstack_overflow, reason, frob);
|
|
|
2936 }
|
|
|
2937
|
|
|
2938 DOESNT_RETURN
|
|
867
|
2939 out_of_memory (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2940 {
|
|
|
2941 signal_error (Qout_of_memory, reason, frob);
|
|
|
2942 }
|
|
|
2943
|
|
|
2944 DOESNT_RETURN
|
|
867
|
2945 printing_unreadable_object (const CIbyte *fmt, ...)
|
|
563
|
2946 {
|
|
|
2947 Lisp_Object obj;
|
|
|
2948 va_list args;
|
|
|
2949
|
|
|
2950 va_start (args, fmt);
|
|
771
|
2951 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
563
|
2952 va_end (args);
|
|
|
2953
|
|
|
2954 /* Fsignal GC-protects its args */
|
|
|
2955 signal_error (Qprinting_unreadable_object, 0, obj);
|
|
442
|
2956 }
|
|
|
2957
|
|
428
|
2958
|
|
|
2959 /************************************************************************/
|
|
|
2960 /* User commands */
|
|
|
2961 /************************************************************************/
|
|
|
2962
|
|
|
2963 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
2964 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
2965 This means it contains a description for how to read arguments to give it.
|
|
|
2966 The value is nil for an invalid function or a symbol with no function
|
|
|
2967 definition.
|
|
|
2968
|
|
|
2969 Interactively callable functions include
|
|
|
2970
|
|
|
2971 -- strings and vectors (treated as keyboard macros)
|
|
|
2972 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2973 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2974 (i.e. the interactive flag)
|
|
|
2975 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2976 value
|
|
|
2977 -- subrs (built-in functions) that are interactively callable
|
|
|
2978
|
|
|
2979 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
2980 */
|
|
|
2981 (function))
|
|
|
2982 {
|
|
|
2983 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2984
|
|
|
2985 if (COMPILED_FUNCTIONP (fun))
|
|
|
2986 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2987
|
|
|
2988 /* Lists may represent commands. */
|
|
|
2989 if (CONSP (fun))
|
|
|
2990 {
|
|
|
2991 Lisp_Object funcar = XCAR (fun);
|
|
|
2992 if (EQ (funcar, Qlambda))
|
|
|
2993 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2994 if (EQ (funcar, Qautoload))
|
|
|
2995 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2996 else
|
|
|
2997 return Qnil;
|
|
|
2998 }
|
|
|
2999
|
|
|
3000 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
3001 interactive spec. */
|
|
|
3002 if (SUBRP (fun))
|
|
|
3003 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
3004
|
|
|
3005 /* Strings and vectors are keyboard macros. */
|
|
|
3006 if (VECTORP (fun) || STRINGP (fun))
|
|
|
3007 return Qt;
|
|
|
3008
|
|
|
3009 /* Everything else (including Qunbound) is not a command. */
|
|
|
3010 return Qnil;
|
|
|
3011 }
|
|
|
3012
|
|
|
3013 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
3014 Execute CMD as an editor command.
|
|
|
3015 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
3016 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
3017 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
3018 when reading the arguments.
|
|
|
3019 */
|
|
444
|
3020 (cmd, record_flag, keys))
|
|
428
|
3021 {
|
|
|
3022 /* This function can GC */
|
|
|
3023 Lisp_Object prefixarg;
|
|
|
3024 Lisp_Object final = cmd;
|
|
|
3025 struct backtrace backtrace;
|
|
|
3026 struct console *con = XCONSOLE (Vselected_console);
|
|
|
3027
|
|
|
3028 prefixarg = con->prefix_arg;
|
|
|
3029 con->prefix_arg = Qnil;
|
|
|
3030 Vcurrent_prefix_arg = prefixarg;
|
|
|
3031 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
3032
|
|
|
3033 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
733
|
3034 return run_hook (Qdisabled_command_hook);
|
|
428
|
3035
|
|
|
3036 for (;;)
|
|
|
3037 {
|
|
|
3038 final = indirect_function (cmd, 1);
|
|
|
3039 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
970
|
3040 {
|
|
|
3041 /* do_autoload GCPROs both arguments */
|
|
|
3042 do_autoload (final, cmd);
|
|
|
3043 }
|
|
428
|
3044 else
|
|
|
3045 break;
|
|
|
3046 }
|
|
|
3047
|
|
|
3048 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
3049 {
|
|
|
3050 backtrace.function = &Qcall_interactively;
|
|
|
3051 backtrace.args = &cmd;
|
|
|
3052 backtrace.nargs = 1;
|
|
|
3053 backtrace.evalargs = 0;
|
|
|
3054 backtrace.pdlcount = specpdl_depth();
|
|
|
3055 backtrace.debug_on_exit = 0;
|
|
|
3056 PUSH_BACKTRACE (backtrace);
|
|
|
3057
|
|
444
|
3058 final = Fcall_interactively (cmd, record_flag, keys);
|
|
428
|
3059
|
|
|
3060 POP_BACKTRACE (backtrace);
|
|
|
3061 return final;
|
|
|
3062 }
|
|
|
3063 else if (STRINGP (final) || VECTORP (final))
|
|
|
3064 {
|
|
|
3065 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
3066 }
|
|
|
3067 else
|
|
|
3068 {
|
|
|
3069 Fsignal (Qwrong_type_argument,
|
|
|
3070 Fcons (Qcommandp,
|
|
|
3071 (EQ (cmd, final)
|
|
|
3072 ? list1 (cmd)
|
|
|
3073 : list2 (cmd, final))));
|
|
|
3074 return Qnil;
|
|
|
3075 }
|
|
|
3076 }
|
|
|
3077
|
|
|
3078 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
3079 Return t if function in which this appears was called interactively.
|
|
|
3080 This means that the function was called with call-interactively (which
|
|
|
3081 includes being called as the binding of a key)
|
|
|
3082 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
3083 */
|
|
|
3084 ())
|
|
|
3085 {
|
|
|
3086 REGISTER struct backtrace *btp;
|
|
|
3087 REGISTER Lisp_Object fun;
|
|
|
3088
|
|
|
3089 if (!INTERACTIVE)
|
|
|
3090 return Qnil;
|
|
|
3091
|
|
|
3092 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
3093 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
3094 function). Note that *btp->function may be a symbol pointing at a
|
|
|
3095 compiled function. */
|
|
|
3096 btp = backtrace_list;
|
|
|
3097
|
|
|
3098 #if 0 /* FSFmacs */
|
|
|
3099
|
|
|
3100 /* #### FSFmacs does the following instead. I can't figure
|
|
|
3101 out which one is more correct. */
|
|
|
3102 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
3103 the top for Finteractive_p itself. If so, skip it. */
|
|
|
3104 fun = Findirect_function (*btp->function);
|
|
|
3105 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
3106 btp = btp->next;
|
|
|
3107
|
|
|
3108 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
3109 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
3110 definition, this function isn't really being called
|
|
|
3111 interactively, but because that's the way Emacs 18 always builds
|
|
|
3112 byte-compiled functions, we'll accept it for now. */
|
|
|
3113 if (EQ (*btp->function, Qbyte_code))
|
|
|
3114 btp = btp->next;
|
|
|
3115
|
|
|
3116 /* If this isn't a byte-compiled function, then we may now be
|
|
|
3117 looking at several frames for special forms. Skip past them. */
|
|
|
3118 while (btp &&
|
|
|
3119 btp->nargs == UNEVALLED)
|
|
|
3120 btp = btp->next;
|
|
|
3121
|
|
|
3122 #else
|
|
|
3123
|
|
|
3124 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
3125 btp = btp->next;
|
|
|
3126 for (;
|
|
|
3127 btp && (btp->nargs == UNEVALLED
|
|
|
3128 || EQ (*btp->function, Qbyte_code));
|
|
|
3129 btp = btp->next)
|
|
|
3130 {}
|
|
|
3131 /* btp now points at the frame of the innermost function
|
|
|
3132 that DOES eval its args.
|
|
|
3133 If it is a built-in function (such as load or eval-region)
|
|
|
3134 return nil. */
|
|
|
3135 /* Beats me why this is necessary, but it is */
|
|
|
3136 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
3137 return Qt;
|
|
|
3138
|
|
|
3139 #endif
|
|
|
3140
|
|
|
3141 fun = Findirect_function (*btp->function);
|
|
|
3142 if (SUBRP (fun))
|
|
|
3143 return Qnil;
|
|
|
3144 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
3145 Return t if that function was called interactively. */
|
|
|
3146 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
3147 return Qt;
|
|
|
3148 return Qnil;
|
|
|
3149 }
|
|
|
3150
|
|
|
3151
|
|
|
3152 /************************************************************************/
|
|
|
3153 /* Autoloading */
|
|
|
3154 /************************************************************************/
|
|
|
3155
|
|
|
3156 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
444
|
3157 Define FUNCTION to autoload from FILENAME.
|
|
|
3158 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'.
|
|
|
3159 The remaining optional arguments provide additional info about the
|
|
|
3160 real definition.
|
|
|
3161 DOCSTRING is documentation for FUNCTION.
|
|
|
3162 INTERACTIVE, if non-nil, says FUNCTION can be called interactively.
|
|
|
3163 TYPE indicates the type of the object:
|
|
428
|
3164 nil or omitted says FUNCTION is a function,
|
|
|
3165 `keymap' says FUNCTION is really a keymap, and
|
|
|
3166 `macro' or t says FUNCTION is really a macro.
|
|
444
|
3167 If FUNCTION already has a non-void function definition that is not an
|
|
|
3168 autoload object, this function does nothing and returns nil.
|
|
428
|
3169 */
|
|
444
|
3170 (function, filename, docstring, interactive, type))
|
|
428
|
3171 {
|
|
|
3172 /* This function can GC */
|
|
|
3173 CHECK_SYMBOL (function);
|
|
444
|
3174 CHECK_STRING (filename);
|
|
428
|
3175
|
|
|
3176 /* If function is defined and not as an autoload, don't override */
|
|
|
3177 {
|
|
|
3178 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
3179 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
3180 return Qnil;
|
|
|
3181 }
|
|
|
3182
|
|
|
3183 if (purify_flag)
|
|
|
3184 {
|
|
|
3185 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
444
|
3186 filename = Fsymbol_name (Fintern (filename, Qnil));
|
|
428
|
3187 }
|
|
440
|
3188
|
|
444
|
3189 return Ffset (function, Fcons (Qautoload, list4 (filename,
|
|
428
|
3190 docstring,
|
|
|
3191 interactive,
|
|
|
3192 type)));
|
|
|
3193 }
|
|
|
3194
|
|
|
3195 Lisp_Object
|
|
|
3196 un_autoload (Lisp_Object oldqueue)
|
|
|
3197 {
|
|
|
3198 /* This function can GC */
|
|
|
3199 REGISTER Lisp_Object queue, first, second;
|
|
|
3200
|
|
|
3201 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
3202 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
3203 queue = Vautoload_queue;
|
|
|
3204 Vautoload_queue = oldqueue;
|
|
|
3205 while (CONSP (queue))
|
|
|
3206 {
|
|
|
3207 first = XCAR (queue);
|
|
|
3208 second = Fcdr (first);
|
|
|
3209 first = Fcar (first);
|
|
|
3210 if (NILP (second))
|
|
|
3211 Vfeatures = first;
|
|
|
3212 else
|
|
|
3213 Ffset (first, second);
|
|
|
3214 queue = Fcdr (queue);
|
|
|
3215 }
|
|
|
3216 return Qnil;
|
|
|
3217 }
|
|
|
3218
|
|
970
|
3219 /* do_autoload GCPROs both arguments */
|
|
428
|
3220 void
|
|
|
3221 do_autoload (Lisp_Object fundef,
|
|
|
3222 Lisp_Object funname)
|
|
|
3223 {
|
|
|
3224 /* This function can GC */
|
|
|
3225 int speccount = specpdl_depth();
|
|
|
3226 Lisp_Object fun = funname;
|
|
970
|
3227 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
428
|
3228
|
|
|
3229 CHECK_SYMBOL (funname);
|
|
970
|
3230 GCPRO3 (fundef, funname, fun);
|
|
428
|
3231
|
|
|
3232 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
3233 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
3234 Vautoload_queue = Qt;
|
|
|
3235 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
3236
|
|
|
3237 {
|
|
|
3238 Lisp_Object queue;
|
|
|
3239
|
|
|
3240 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
3241 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
3242 {
|
|
|
3243 Lisp_Object first = XCAR (queue);
|
|
|
3244 Lisp_Object second = Fcdr (first);
|
|
|
3245
|
|
|
3246 first = Fcar (first);
|
|
|
3247
|
|
|
3248 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
3249 may be an atom if the autoload entry was generated by a defalias
|
|
|
3250 or fset. */
|
|
|
3251 if (CONSP (second))
|
|
|
3252 Fput (first, Qautoload, (XCDR (second)));
|
|
|
3253 }
|
|
|
3254 }
|
|
|
3255
|
|
|
3256 /* Once loading finishes, don't undo it. */
|
|
|
3257 Vautoload_queue = Qt;
|
|
771
|
3258 unbind_to (speccount);
|
|
428
|
3259
|
|
|
3260 fun = indirect_function (fun, 0);
|
|
|
3261
|
|
|
3262 #if 0 /* FSFmacs */
|
|
|
3263 if (!NILP (Fequal (fun, fundef)))
|
|
|
3264 #else
|
|
|
3265 if (UNBOUNDP (fun)
|
|
|
3266 || (CONSP (fun)
|
|
|
3267 && EQ (XCAR (fun), Qautoload)))
|
|
|
3268 #endif
|
|
563
|
3269 invalid_state ("Autoloading failed to define function", funname);
|
|
428
|
3270 UNGCPRO;
|
|
|
3271 }
|
|
|
3272
|
|
|
3273
|
|
|
3274 /************************************************************************/
|
|
|
3275 /* eval, funcall, apply */
|
|
|
3276 /************************************************************************/
|
|
|
3277
|
|
814
|
3278 /* NOTE: If you are hearing the endless complaint that function calls in
|
|
|
3279 elisp are extremely slow, it just isn't true any more! The stuff below
|
|
|
3280 -- in particular, the calling of subrs and compiled functions, the most
|
|
|
3281 common cases -- has been highly optimized. There isn't a whole lot left
|
|
|
3282 to do to squeeze more speed out except by switching to lexical
|
|
|
3283 variables, which would eliminate the specbind loop. (But the real gain
|
|
|
3284 from lexical variables would come from better optimization -- with
|
|
|
3285 dynamic binding, you have the constant problem that any function call
|
|
|
3286 that you haven't explicitly proven to be side-effect-free might
|
|
|
3287 potentially side effect your local variables, which makes optimization
|
|
|
3288 extremely difficult when there are function calls anywhere in a chunk of
|
|
|
3289 code to be optimized. Even worse, you don't know that *your* local
|
|
|
3290 variables aren't side-effecting an outer function's local variables, so
|
|
|
3291 it's impossible to optimize away almost *any* variable assignment.) */
|
|
|
3292
|
|
428
|
3293 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
442
|
3294 int nargs, Lisp_Object args[]);
|
|
428
|
3295 static int in_warnings;
|
|
|
3296
|
|
|
3297
|
|
814
|
3298 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f,
|
|
|
3299 int nargs,
|
|
|
3300 Lisp_Object args[]);
|
|
|
3301
|
|
|
3302 /* The theory behind making this a separate function is to shrink
|
|
|
3303 funcall_compiled_function() so as to increase the likelihood of a cache
|
|
|
3304 hit in the L1 cache -- &rest processing is not going to be fast anyway.
|
|
|
3305 The idea is the same as with execute_rare_opcode() in bytecode.c. We
|
|
|
3306 make this non-static to ensure the compiler doesn't inline it. */
|
|
|
3307
|
|
|
3308 void
|
|
|
3309 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs,
|
|
|
3310 Lisp_Object args[])
|
|
|
3311 {
|
|
|
3312 REGISTER int i = 0;
|
|
|
3313 int max_non_rest_args = f->args_in_array - 1;
|
|
|
3314 int bindargs = min (nargs, max_non_rest_args);
|
|
|
3315
|
|
|
3316 for (i = 0; i < bindargs; i++)
|
|
|
3317 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3318 for (i = bindargs; i < max_non_rest_args; i++)
|
|
|
3319 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
|
3320 SPECBIND_FAST_UNSAFE
|
|
|
3321 (f->args[max_non_rest_args],
|
|
|
3322 nargs > max_non_rest_args ?
|
|
|
3323 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) :
|
|
|
3324 Qnil);
|
|
|
3325 }
|
|
|
3326
|
|
|
3327 /* Apply compiled-function object FUN to the NARGS evaluated arguments
|
|
|
3328 in ARGS, and return the result of evaluation. */
|
|
|
3329 inline static Lisp_Object
|
|
|
3330 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3331 {
|
|
|
3332 /* This function can GC */
|
|
|
3333 int speccount = specpdl_depth();
|
|
|
3334 REGISTER int i = 0;
|
|
|
3335 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun);
|
|
|
3336
|
|
|
3337 if (!OPAQUEP (f->instructions))
|
|
|
3338 /* Lazily munge the instructions into a more efficient form */
|
|
|
3339 optimize_compiled_function (fun);
|
|
|
3340
|
|
|
3341 /* optimize_compiled_function() guaranteed that f->specpdl_depth is
|
|
|
3342 the required space on the specbinding stack for binding the args
|
|
|
3343 and local variables of fun. So just reserve it once. */
|
|
|
3344 SPECPDL_RESERVE (f->specpdl_depth);
|
|
|
3345
|
|
|
3346 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified
|
|
|
3347 optional arguments. */
|
|
|
3348 {
|
|
|
3349 #if 1
|
|
|
3350 for (i = 0; i < nargs; i++)
|
|
|
3351 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3352 #else
|
|
|
3353 /* Here's an alternate way to write the loop that tries to further
|
|
|
3354 optimize funcalls for functions with few arguments by partially
|
|
|
3355 unrolling the loop. It's not clear whether this is a win since it
|
|
|
3356 increases the size of the function and the possibility of L1 cache
|
|
|
3357 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes
|
|
|
3358 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte
|
|
|
3359 compiler repeatedly and looking at the total time, show very
|
|
|
3360 little difference between the simple loop above, the unrolled code
|
|
|
3361 below, and a "partly unrolled" solution with only cases 0-2 below
|
|
|
3362 instead of 0-4. Therefore, I'm keeping it at the simple loop
|
|
|
3363 because it's smaller. */
|
|
|
3364 switch (nargs)
|
|
|
3365 {
|
|
|
3366 default:
|
|
|
3367 for (i = nargs - 1; i >= 4; i--)
|
|
|
3368 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3369 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]);
|
|
|
3370 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]);
|
|
|
3371 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]);
|
|
|
3372 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]);
|
|
|
3373 case 0: break;
|
|
|
3374 }
|
|
|
3375 #endif
|
|
|
3376 }
|
|
|
3377 else if (nargs < f->min_args)
|
|
|
3378 goto wrong_number_of_arguments;
|
|
|
3379 else if (nargs < f->max_args)
|
|
|
3380 {
|
|
|
3381 for (i = 0; i < nargs; i++)
|
|
|
3382 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3383 for (i = nargs; i < f->max_args; i++)
|
|
|
3384 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
|
3385 }
|
|
|
3386 else if (f->max_args == MANY)
|
|
|
3387 handle_compiled_function_with_and_rest (f, nargs, args);
|
|
|
3388 else
|
|
|
3389 {
|
|
|
3390 wrong_number_of_arguments:
|
|
|
3391 /* The actual printed compiled_function object is incomprehensible.
|
|
|
3392 Check the backtrace to see if we can get a more meaningful symbol. */
|
|
|
3393 if (EQ (fun, indirect_function (*backtrace_list->function, 0)))
|
|
|
3394 fun = *backtrace_list->function;
|
|
|
3395 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3396 list2 (fun, make_int (nargs)));
|
|
|
3397 }
|
|
|
3398
|
|
|
3399 {
|
|
|
3400 Lisp_Object value =
|
|
|
3401 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions),
|
|
|
3402 f->stack_depth,
|
|
|
3403 XVECTOR_DATA (f->constants));
|
|
|
3404
|
|
|
3405 /* The attempt to optimize this by only unbinding variables failed
|
|
|
3406 because using buffer-local variables as function parameters
|
|
|
3407 leads to specpdl_ptr->func != 0 */
|
|
|
3408 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */
|
|
|
3409 UNBIND_TO_GCPRO (speccount, value);
|
|
|
3410 return value;
|
|
|
3411 }
|
|
|
3412 }
|
|
|
3413
|
|
428
|
3414 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
3415 Evaluate FORM and return its value.
|
|
|
3416 */
|
|
|
3417 (form))
|
|
|
3418 {
|
|
|
3419 /* This function can GC */
|
|
|
3420 Lisp_Object fun, val, original_fun, original_args;
|
|
|
3421 int nargs;
|
|
|
3422 struct backtrace backtrace;
|
|
|
3423
|
|
|
3424 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
853
|
3425 while (!in_warnings && !NILP (Vpending_warnings)
|
|
|
3426 /* well, perhaps not so safe after all! */
|
|
|
3427 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY))
|
|
428
|
3428 {
|
|
|
3429 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
3430 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
853
|
3431 int speccount = internal_bind_int (&in_warnings, 1);
|
|
|
3432
|
|
428
|
3433 this_warning_cons = Vpending_warnings;
|
|
|
3434 this_warning = XCAR (this_warning_cons);
|
|
|
3435 /* in case an error occurs in the warn function, at least
|
|
|
3436 it won't happen infinitely */
|
|
|
3437 Vpending_warnings = XCDR (Vpending_warnings);
|
|
853
|
3438 free_cons (this_warning_cons);
|
|
428
|
3439 class = XCAR (this_warning);
|
|
|
3440 level = XCAR (XCDR (this_warning));
|
|
|
3441 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
3442 free_list (this_warning);
|
|
|
3443
|
|
|
3444 if (NILP (Vpending_warnings))
|
|
|
3445 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
3446 but safer */
|
|
|
3447
|
|
|
3448 GCPRO4 (form, class, level, messij);
|
|
|
3449 if (!STRINGP (messij))
|
|
|
3450 messij = Fprin1_to_string (messij, Qnil);
|
|
|
3451 call3 (Qdisplay_warning, class, messij, level);
|
|
|
3452 UNGCPRO;
|
|
771
|
3453 unbind_to (speccount);
|
|
428
|
3454 }
|
|
|
3455
|
|
|
3456 if (!CONSP (form))
|
|
|
3457 {
|
|
|
3458 if (SYMBOLP (form))
|
|
|
3459 return Fsymbol_value (form);
|
|
|
3460 else
|
|
|
3461 return form;
|
|
|
3462 }
|
|
|
3463
|
|
|
3464 QUIT;
|
|
814
|
3465 if (need_to_garbage_collect)
|
|
428
|
3466 {
|
|
|
3467 struct gcpro gcpro1;
|
|
|
3468 GCPRO1 (form);
|
|
|
3469 garbage_collect_1 ();
|
|
|
3470 UNGCPRO;
|
|
|
3471 }
|
|
|
3472
|
|
|
3473 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3474 {
|
|
|
3475 if (max_lisp_eval_depth < 100)
|
|
|
3476 max_lisp_eval_depth = 100;
|
|
|
3477 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3478 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3479 Qunbound);
|
|
428
|
3480 }
|
|
|
3481
|
|
|
3482 /* We guaranteed CONSP (form) above */
|
|
|
3483 original_fun = XCAR (form);
|
|
|
3484 original_args = XCDR (form);
|
|
|
3485
|
|
|
3486 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
3487
|
|
|
3488 backtrace.pdlcount = specpdl_depth();
|
|
|
3489 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3490 backtrace.args = &original_args;
|
|
|
3491 backtrace.nargs = UNEVALLED;
|
|
|
3492 backtrace.evalargs = 1;
|
|
|
3493 backtrace.debug_on_exit = 0;
|
|
|
3494 PUSH_BACKTRACE (backtrace);
|
|
|
3495
|
|
|
3496 if (debug_on_next_call)
|
|
|
3497 do_debug_on_call (Qt);
|
|
|
3498
|
|
|
3499 if (profiling_active)
|
|
|
3500 profile_increase_call_count (original_fun);
|
|
|
3501
|
|
|
3502 /* At this point, only original_fun and original_args
|
|
|
3503 have values that will be used below. */
|
|
|
3504 retry:
|
|
|
3505 fun = indirect_function (original_fun, 1);
|
|
|
3506
|
|
|
3507 if (SUBRP (fun))
|
|
|
3508 {
|
|
|
3509 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3510 int max_args = subr->max_args;
|
|
|
3511
|
|
|
3512 if (nargs < subr->min_args)
|
|
|
3513 goto wrong_number_of_arguments;
|
|
|
3514
|
|
|
3515 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
3516 {
|
|
|
3517 backtrace.evalargs = 0;
|
|
|
3518 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
3519 (original_args));
|
|
|
3520 }
|
|
|
3521 else if (nargs <= max_args)
|
|
|
3522 {
|
|
|
3523 struct gcpro gcpro1;
|
|
|
3524 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
3525 REGISTER Lisp_Object *p = args;
|
|
|
3526
|
|
|
3527 GCPRO1 (args[0]);
|
|
|
3528 gcpro1.nvars = 0;
|
|
|
3529
|
|
|
3530 {
|
|
|
3531 LIST_LOOP_2 (arg, original_args)
|
|
|
3532 {
|
|
|
3533 *p++ = Feval (arg);
|
|
|
3534 gcpro1.nvars++;
|
|
|
3535 }
|
|
|
3536 }
|
|
|
3537
|
|
|
3538 /* &optional args default to nil. */
|
|
|
3539 while (p - args < max_args)
|
|
|
3540 *p++ = Qnil;
|
|
|
3541
|
|
|
3542 backtrace.args = args;
|
|
|
3543 backtrace.nargs = nargs;
|
|
|
3544
|
|
|
3545 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3546
|
|
|
3547 UNGCPRO;
|
|
|
3548 }
|
|
|
3549 else if (max_args == MANY)
|
|
|
3550 {
|
|
|
3551 /* Pass a vector of evaluated arguments */
|
|
|
3552 struct gcpro gcpro1;
|
|
|
3553 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3554 REGISTER Lisp_Object *p = args;
|
|
|
3555
|
|
|
3556 GCPRO1 (args[0]);
|
|
|
3557 gcpro1.nvars = 0;
|
|
|
3558
|
|
|
3559 {
|
|
|
3560 LIST_LOOP_2 (arg, original_args)
|
|
|
3561 {
|
|
|
3562 *p++ = Feval (arg);
|
|
|
3563 gcpro1.nvars++;
|
|
|
3564 }
|
|
|
3565 }
|
|
|
3566
|
|
|
3567 backtrace.args = args;
|
|
|
3568 backtrace.nargs = nargs;
|
|
|
3569
|
|
|
3570 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3571 (nargs, args));
|
|
|
3572
|
|
|
3573 UNGCPRO;
|
|
|
3574 }
|
|
|
3575 else
|
|
|
3576 {
|
|
|
3577 wrong_number_of_arguments:
|
|
440
|
3578 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
428
|
3579 }
|
|
|
3580 }
|
|
|
3581 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3582 {
|
|
|
3583 struct gcpro gcpro1;
|
|
|
3584 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3585 REGISTER Lisp_Object *p = args;
|
|
|
3586
|
|
|
3587 GCPRO1 (args[0]);
|
|
|
3588 gcpro1.nvars = 0;
|
|
|
3589
|
|
|
3590 {
|
|
|
3591 LIST_LOOP_2 (arg, original_args)
|
|
|
3592 {
|
|
|
3593 *p++ = Feval (arg);
|
|
|
3594 gcpro1.nvars++;
|
|
|
3595 }
|
|
|
3596 }
|
|
|
3597
|
|
|
3598 backtrace.args = args;
|
|
|
3599 backtrace.nargs = nargs;
|
|
|
3600 backtrace.evalargs = 0;
|
|
|
3601
|
|
|
3602 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3603
|
|
|
3604 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3605 if (backtrace.debug_on_exit)
|
|
|
3606 val = do_debug_on_exit (val);
|
|
|
3607 /* Don't do it again when we return to eval. */
|
|
|
3608 backtrace.debug_on_exit = 0;
|
|
|
3609
|
|
|
3610 UNGCPRO;
|
|
|
3611 }
|
|
|
3612 else if (CONSP (fun))
|
|
|
3613 {
|
|
|
3614 Lisp_Object funcar = XCAR (fun);
|
|
|
3615
|
|
|
3616 if (EQ (funcar, Qautoload))
|
|
|
3617 {
|
|
970
|
3618 /* do_autoload GCPROs both arguments */
|
|
428
|
3619 do_autoload (fun, original_fun);
|
|
|
3620 goto retry;
|
|
|
3621 }
|
|
|
3622 else if (EQ (funcar, Qmacro))
|
|
|
3623 {
|
|
|
3624 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3625 }
|
|
|
3626 else if (EQ (funcar, Qlambda))
|
|
|
3627 {
|
|
|
3628 struct gcpro gcpro1;
|
|
|
3629 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3630 REGISTER Lisp_Object *p = args;
|
|
|
3631
|
|
|
3632 GCPRO1 (args[0]);
|
|
|
3633 gcpro1.nvars = 0;
|
|
|
3634
|
|
|
3635 {
|
|
|
3636 LIST_LOOP_2 (arg, original_args)
|
|
|
3637 {
|
|
|
3638 *p++ = Feval (arg);
|
|
|
3639 gcpro1.nvars++;
|
|
|
3640 }
|
|
|
3641 }
|
|
|
3642
|
|
|
3643 UNGCPRO;
|
|
|
3644
|
|
|
3645 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3646 backtrace.nargs = nargs;
|
|
|
3647 backtrace.evalargs = 0;
|
|
|
3648
|
|
|
3649 val = funcall_lambda (fun, nargs, args);
|
|
|
3650
|
|
|
3651 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3652 if (backtrace.debug_on_exit)
|
|
|
3653 val = do_debug_on_exit (val);
|
|
|
3654 /* Don't do it again when we return to eval. */
|
|
|
3655 backtrace.debug_on_exit = 0;
|
|
|
3656 }
|
|
|
3657 else
|
|
|
3658 {
|
|
|
3659 goto invalid_function;
|
|
|
3660 }
|
|
|
3661 }
|
|
|
3662 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3663 {
|
|
|
3664 invalid_function:
|
|
436
|
3665 val = signal_invalid_function_error (fun);
|
|
428
|
3666 }
|
|
|
3667
|
|
|
3668 lisp_eval_depth--;
|
|
|
3669 if (backtrace.debug_on_exit)
|
|
|
3670 val = do_debug_on_exit (val);
|
|
|
3671 POP_BACKTRACE (backtrace);
|
|
|
3672 return val;
|
|
|
3673 }
|
|
|
3674
|
|
|
3675
|
|
1111
|
3676
|
|
|
3677 static void
|
|
|
3678 run_post_gc_hook (void)
|
|
|
3679 {
|
|
|
3680 Lisp_Object args[2];
|
|
|
3681
|
|
|
3682 args[0] = Qpost_gc_hook;
|
|
|
3683 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil);
|
|
|
3684
|
|
|
3685 run_hook_with_args_trapping_problems
|
|
|
3686 ("Error in post-gc-hook",
|
|
|
3687 2, args,
|
|
|
3688 RUN_HOOKS_TO_COMPLETION,
|
|
|
3689 INHIBIT_QUIT | NO_INHIBIT_ERRORS);
|
|
|
3690 }
|
|
|
3691
|
|
428
|
3692 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3693 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3694 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3695 */
|
|
|
3696 (int nargs, Lisp_Object *args))
|
|
|
3697 {
|
|
|
3698 /* This function can GC */
|
|
|
3699 Lisp_Object fun;
|
|
|
3700 Lisp_Object val;
|
|
|
3701 struct backtrace backtrace;
|
|
|
3702 int fun_nargs = nargs - 1;
|
|
|
3703 Lisp_Object *fun_args = args + 1;
|
|
|
3704
|
|
|
3705 QUIT;
|
|
851
|
3706
|
|
|
3707 if (funcall_allocation_flag)
|
|
|
3708 {
|
|
|
3709 if (need_to_garbage_collect)
|
|
|
3710 /* Callers should gcpro lexpr args */
|
|
|
3711 garbage_collect_1 ();
|
|
|
3712 if (need_to_check_c_alloca)
|
|
|
3713 {
|
|
|
3714 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP)
|
|
|
3715 {
|
|
|
3716 xemacs_c_alloca (0);
|
|
|
3717 funcall_alloca_count = 0;
|
|
|
3718 }
|
|
|
3719 }
|
|
887
|
3720 if (need_to_signal_post_gc)
|
|
|
3721 {
|
|
|
3722 need_to_signal_post_gc = 0;
|
|
1111
|
3723 recompute_funcall_allocation_flag ();
|
|
|
3724 run_post_gc_hook ();
|
|
887
|
3725 }
|
|
851
|
3726 }
|
|
428
|
3727
|
|
|
3728 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3729 {
|
|
|
3730 if (max_lisp_eval_depth < 100)
|
|
|
3731 max_lisp_eval_depth = 100;
|
|
|
3732 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3733 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3734 Qunbound);
|
|
428
|
3735 }
|
|
|
3736
|
|
|
3737 backtrace.pdlcount = specpdl_depth();
|
|
|
3738 backtrace.function = &args[0];
|
|
|
3739 backtrace.args = fun_args;
|
|
|
3740 backtrace.nargs = fun_nargs;
|
|
|
3741 backtrace.evalargs = 0;
|
|
|
3742 backtrace.debug_on_exit = 0;
|
|
|
3743 PUSH_BACKTRACE (backtrace);
|
|
|
3744
|
|
|
3745 if (debug_on_next_call)
|
|
|
3746 do_debug_on_call (Qlambda);
|
|
|
3747
|
|
|
3748 retry:
|
|
|
3749
|
|
|
3750 fun = args[0];
|
|
|
3751
|
|
|
3752 /* It might be useful to place this *after* all the checks. */
|
|
|
3753 if (profiling_active)
|
|
|
3754 profile_increase_call_count (fun);
|
|
|
3755
|
|
|
3756 /* We could call indirect_function directly, but profiling shows
|
|
|
3757 this is worth optimizing by partially unrolling the loop. */
|
|
|
3758 if (SYMBOLP (fun))
|
|
|
3759 {
|
|
|
3760 fun = XSYMBOL (fun)->function;
|
|
|
3761 if (SYMBOLP (fun))
|
|
|
3762 {
|
|
|
3763 fun = XSYMBOL (fun)->function;
|
|
|
3764 if (SYMBOLP (fun))
|
|
|
3765 fun = indirect_function (fun, 1);
|
|
|
3766 }
|
|
|
3767 }
|
|
|
3768
|
|
|
3769 if (SUBRP (fun))
|
|
|
3770 {
|
|
|
3771 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3772 int max_args = subr->max_args;
|
|
|
3773 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3774
|
|
|
3775 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3776 {
|
|
|
3777 funcall_subr:
|
|
|
3778 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
|
3779 }
|
|
436
|
3780 else if (fun_nargs < subr->min_args)
|
|
|
3781 {
|
|
|
3782 goto wrong_number_of_arguments;
|
|
|
3783 }
|
|
428
|
3784 else if (fun_nargs < max_args)
|
|
|
3785 {
|
|
|
3786 Lisp_Object *p = spacious_args;
|
|
|
3787
|
|
|
3788 /* Default optionals to nil */
|
|
|
3789 while (fun_nargs--)
|
|
|
3790 *p++ = *fun_args++;
|
|
|
3791 while (p - spacious_args < max_args)
|
|
|
3792 *p++ = Qnil;
|
|
|
3793
|
|
|
3794 fun_args = spacious_args;
|
|
|
3795 goto funcall_subr;
|
|
|
3796 }
|
|
|
3797 else if (max_args == MANY)
|
|
|
3798 {
|
|
436
|
3799 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
428
|
3800 }
|
|
|
3801 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3802 {
|
|
|
3803 goto invalid_function;
|
|
|
3804 }
|
|
|
3805 else
|
|
|
3806 {
|
|
|
3807 wrong_number_of_arguments:
|
|
436
|
3808 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3809 }
|
|
|
3810 }
|
|
|
3811 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3812 {
|
|
|
3813 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
|
3814 }
|
|
|
3815 else if (CONSP (fun))
|
|
|
3816 {
|
|
|
3817 Lisp_Object funcar = XCAR (fun);
|
|
|
3818
|
|
|
3819 if (EQ (funcar, Qlambda))
|
|
|
3820 {
|
|
|
3821 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3822 }
|
|
|
3823 else if (EQ (funcar, Qautoload))
|
|
|
3824 {
|
|
970
|
3825 /* do_autoload GCPROs both arguments */
|
|
428
|
3826 do_autoload (fun, args[0]);
|
|
|
3827 goto retry;
|
|
|
3828 }
|
|
|
3829 else /* Can't funcall a macro */
|
|
|
3830 {
|
|
|
3831 goto invalid_function;
|
|
|
3832 }
|
|
|
3833 }
|
|
|
3834 else if (UNBOUNDP (fun))
|
|
|
3835 {
|
|
436
|
3836 val = signal_void_function_error (args[0]);
|
|
428
|
3837 }
|
|
|
3838 else
|
|
|
3839 {
|
|
|
3840 invalid_function:
|
|
436
|
3841 val = signal_invalid_function_error (fun);
|
|
428
|
3842 }
|
|
|
3843
|
|
|
3844 lisp_eval_depth--;
|
|
|
3845 if (backtrace.debug_on_exit)
|
|
|
3846 val = do_debug_on_exit (val);
|
|
|
3847 POP_BACKTRACE (backtrace);
|
|
|
3848 return val;
|
|
|
3849 }
|
|
|
3850
|
|
|
3851 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3852 Return t if OBJECT can be called as a function, else nil.
|
|
|
3853 A function is an object that can be applied to arguments,
|
|
|
3854 using for example `funcall' or `apply'.
|
|
|
3855 */
|
|
|
3856 (object))
|
|
|
3857 {
|
|
|
3858 if (SYMBOLP (object))
|
|
|
3859 object = indirect_function (object, 0);
|
|
|
3860
|
|
919
|
3861 if (COMPILED_FUNCTIONP (object) || SUBRP (object))
|
|
|
3862 return Qt;
|
|
|
3863 if (CONSP (object))
|
|
|
3864 {
|
|
|
3865 Lisp_Object car = XCAR (object);
|
|
|
3866 if (EQ (car, Qlambda))
|
|
|
3867 return Qt;
|
|
|
3868 if (EQ (car, Qautoload)
|
|
|
3869 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object)))))))
|
|
|
3870 return Qt;
|
|
|
3871 }
|
|
|
3872 return Qnil;
|
|
428
|
3873 }
|
|
|
3874
|
|
|
3875 static Lisp_Object
|
|
|
3876 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
3877 {
|
|
|
3878 Lisp_Object orig_function = function;
|
|
|
3879 Lisp_Object arglist;
|
|
|
3880
|
|
|
3881 retry:
|
|
|
3882
|
|
|
3883 if (SYMBOLP (function))
|
|
|
3884 function = indirect_function (function, 1);
|
|
|
3885
|
|
|
3886 if (SUBRP (function))
|
|
|
3887 {
|
|
442
|
3888 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
3889 if (function_min_args_p)
|
|
|
3890 return Fsubr_min_args (function);
|
|
|
3891 else
|
|
|
3892 return Fsubr_max_args (function);
|
|
428
|
3893 }
|
|
|
3894 else if (COMPILED_FUNCTIONP (function))
|
|
|
3895 {
|
|
814
|
3896 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function);
|
|
|
3897
|
|
|
3898 if (function_min_args_p)
|
|
|
3899 return make_int (f->min_args);
|
|
|
3900 else if (f->max_args == MANY)
|
|
|
3901 return Qnil;
|
|
|
3902 else
|
|
|
3903 return make_int (f->max_args);
|
|
428
|
3904 }
|
|
|
3905 else if (CONSP (function))
|
|
|
3906 {
|
|
|
3907 Lisp_Object funcar = XCAR (function);
|
|
|
3908
|
|
|
3909 if (EQ (funcar, Qmacro))
|
|
|
3910 {
|
|
|
3911 function = XCDR (function);
|
|
|
3912 goto retry;
|
|
|
3913 }
|
|
|
3914 else if (EQ (funcar, Qautoload))
|
|
|
3915 {
|
|
970
|
3916 /* do_autoload GCPROs both arguments */
|
|
428
|
3917 do_autoload (function, orig_function);
|
|
442
|
3918 function = orig_function;
|
|
428
|
3919 goto retry;
|
|
|
3920 }
|
|
|
3921 else if (EQ (funcar, Qlambda))
|
|
|
3922 {
|
|
|
3923 arglist = Fcar (XCDR (function));
|
|
|
3924 }
|
|
|
3925 else
|
|
|
3926 {
|
|
|
3927 goto invalid_function;
|
|
|
3928 }
|
|
|
3929 }
|
|
|
3930 else
|
|
|
3931 {
|
|
|
3932 invalid_function:
|
|
442
|
3933 return signal_invalid_function_error (orig_function);
|
|
428
|
3934 }
|
|
|
3935
|
|
|
3936 {
|
|
|
3937 int argcount = 0;
|
|
|
3938
|
|
|
3939 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3940 {
|
|
|
3941 if (EQ (arg, Qand_optional))
|
|
|
3942 {
|
|
|
3943 if (function_min_args_p)
|
|
|
3944 break;
|
|
|
3945 }
|
|
|
3946 else if (EQ (arg, Qand_rest))
|
|
|
3947 {
|
|
|
3948 if (function_min_args_p)
|
|
|
3949 break;
|
|
|
3950 else
|
|
|
3951 return Qnil;
|
|
|
3952 }
|
|
|
3953 else
|
|
|
3954 {
|
|
|
3955 argcount++;
|
|
|
3956 }
|
|
|
3957 }
|
|
|
3958
|
|
|
3959 return make_int (argcount);
|
|
|
3960 }
|
|
|
3961 }
|
|
|
3962
|
|
|
3963 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
617
|
3964 Return the minimum number of arguments a function may be called with.
|
|
428
|
3965 The function may be any form that can be passed to `funcall',
|
|
|
3966 any special form, or any macro.
|
|
853
|
3967
|
|
|
3968 To check if a function can be called with a specified number of
|
|
|
3969 arguments, use `function-allows-args'.
|
|
428
|
3970 */
|
|
|
3971 (function))
|
|
|
3972 {
|
|
|
3973 return function_argcount (function, 1);
|
|
|
3974 }
|
|
|
3975
|
|
|
3976 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
617
|
3977 Return the maximum number of arguments a function may be called with.
|
|
428
|
3978 The function may be any form that can be passed to `funcall',
|
|
|
3979 any special form, or any macro.
|
|
|
3980 If the function takes an arbitrary number of arguments or is
|
|
|
3981 a built-in special form, nil is returned.
|
|
853
|
3982
|
|
|
3983 To check if a function can be called with a specified number of
|
|
|
3984 arguments, use `function-allows-args'.
|
|
428
|
3985 */
|
|
|
3986 (function))
|
|
|
3987 {
|
|
|
3988 return function_argcount (function, 0);
|
|
|
3989 }
|
|
|
3990
|
|
|
3991
|
|
|
3992 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
3993 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
3994 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
3995 */
|
|
|
3996 (int nargs, Lisp_Object *args))
|
|
|
3997 {
|
|
|
3998 /* This function can GC */
|
|
|
3999 Lisp_Object fun = args[0];
|
|
|
4000 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
4001 int numargs;
|
|
|
4002 int funcall_nargs;
|
|
|
4003
|
|
|
4004 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
4005
|
|
|
4006 if (numargs == 0)
|
|
|
4007 /* (apply foo 0 1 '()) */
|
|
|
4008 return Ffuncall (nargs - 1, args);
|
|
|
4009 else if (numargs == 1)
|
|
|
4010 {
|
|
|
4011 /* (apply foo 0 1 '(2)) */
|
|
|
4012 args [nargs - 1] = XCAR (spread_arg);
|
|
|
4013 return Ffuncall (nargs, args);
|
|
|
4014 }
|
|
|
4015
|
|
|
4016 /* -1 for function, -1 for spread arg */
|
|
|
4017 numargs = nargs - 2 + numargs;
|
|
|
4018 /* +1 for function */
|
|
|
4019 funcall_nargs = 1 + numargs;
|
|
|
4020
|
|
|
4021 if (SYMBOLP (fun))
|
|
|
4022 fun = indirect_function (fun, 0);
|
|
|
4023
|
|
|
4024 if (SUBRP (fun))
|
|
|
4025 {
|
|
|
4026 Lisp_Subr *subr = XSUBR (fun);
|
|
|
4027 int max_args = subr->max_args;
|
|
|
4028
|
|
|
4029 if (numargs < subr->min_args
|
|
|
4030 || (max_args >= 0 && max_args < numargs))
|
|
|
4031 {
|
|
|
4032 /* Let funcall get the error */
|
|
|
4033 }
|
|
|
4034 else if (max_args > numargs)
|
|
|
4035 {
|
|
|
4036 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
4037 by explicitly supplying nil's for optional values */
|
|
|
4038 funcall_nargs += (max_args - numargs);
|
|
|
4039 }
|
|
|
4040 }
|
|
|
4041 else if (UNBOUNDP (fun))
|
|
|
4042 {
|
|
|
4043 /* Let funcall get the error */
|
|
|
4044 fun = args[0];
|
|
|
4045 }
|
|
|
4046
|
|
|
4047 {
|
|
|
4048 REGISTER int i;
|
|
|
4049 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
4050 struct gcpro gcpro1;
|
|
|
4051
|
|
|
4052 GCPRO1 (*funcall_args);
|
|
|
4053 gcpro1.nvars = funcall_nargs;
|
|
|
4054
|
|
|
4055 /* Copy in the unspread args */
|
|
|
4056 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
4057 /* Spread the last arg we got. Its first element goes in
|
|
|
4058 the slot that it used to occupy, hence this value of I. */
|
|
|
4059 for (i = nargs - 1;
|
|
|
4060 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
4061 i++, spread_arg = XCDR (spread_arg))
|
|
|
4062 {
|
|
|
4063 funcall_args [i] = XCAR (spread_arg);
|
|
|
4064 }
|
|
|
4065 /* Supply nil for optional args (to subrs) */
|
|
|
4066 for (; i < funcall_nargs; i++)
|
|
|
4067 funcall_args[i] = Qnil;
|
|
|
4068
|
|
|
4069
|
|
|
4070 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
4071 }
|
|
|
4072 }
|
|
|
4073
|
|
|
4074
|
|
|
4075 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
4076 return the result of evaluation. */
|
|
|
4077
|
|
|
4078 static Lisp_Object
|
|
|
4079 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
4080 {
|
|
|
4081 /* This function can GC */
|
|
442
|
4082 Lisp_Object arglist, body, tail;
|
|
428
|
4083 int speccount = specpdl_depth();
|
|
|
4084 REGISTER int i = 0;
|
|
|
4085
|
|
|
4086 tail = XCDR (fun);
|
|
|
4087
|
|
|
4088 if (!CONSP (tail))
|
|
|
4089 goto invalid_function;
|
|
|
4090
|
|
|
4091 arglist = XCAR (tail);
|
|
|
4092 body = XCDR (tail);
|
|
|
4093
|
|
|
4094 {
|
|
|
4095 int optional = 0, rest = 0;
|
|
|
4096
|
|
442
|
4097 EXTERNAL_LIST_LOOP_2 (symbol, arglist)
|
|
428
|
4098 {
|
|
|
4099 if (!SYMBOLP (symbol))
|
|
|
4100 goto invalid_function;
|
|
|
4101 if (EQ (symbol, Qand_rest))
|
|
|
4102 rest = 1;
|
|
|
4103 else if (EQ (symbol, Qand_optional))
|
|
|
4104 optional = 1;
|
|
|
4105 else if (rest)
|
|
|
4106 {
|
|
|
4107 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
4108 i = nargs;
|
|
|
4109 }
|
|
|
4110 else if (i < nargs)
|
|
|
4111 specbind (symbol, args[i++]);
|
|
|
4112 else if (!optional)
|
|
|
4113 goto wrong_number_of_arguments;
|
|
|
4114 else
|
|
|
4115 specbind (symbol, Qnil);
|
|
|
4116 }
|
|
|
4117 }
|
|
|
4118
|
|
|
4119 if (i < nargs)
|
|
|
4120 goto wrong_number_of_arguments;
|
|
|
4121
|
|
771
|
4122 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
4123
|
|
|
4124 wrong_number_of_arguments:
|
|
436
|
4125 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
4126
|
|
|
4127 invalid_function:
|
|
436
|
4128 return signal_invalid_function_error (fun);
|
|
428
|
4129 }
|
|
|
4130
|
|
|
4131
|
|
|
4132 /************************************************************************/
|
|
|
4133 /* Run hook variables in various ways. */
|
|
|
4134 /************************************************************************/
|
|
|
4135
|
|
|
4136 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
4137 Run each hook in HOOKS. Major mode functions use this.
|
|
|
4138 Each argument should be a symbol, a hook variable.
|
|
|
4139 These symbols are processed in the order specified.
|
|
|
4140 If a hook symbol has a non-nil value, that value may be a function
|
|
|
4141 or a list of functions to be called to run the hook.
|
|
|
4142 If the value is a function, it is called with no arguments.
|
|
|
4143 If it is a list, the elements are called, in order, with no arguments.
|
|
|
4144
|
|
|
4145 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4146 not `make-local-variable'.
|
|
|
4147 */
|
|
|
4148 (int nargs, Lisp_Object *args))
|
|
|
4149 {
|
|
|
4150 REGISTER int i;
|
|
|
4151
|
|
|
4152 for (i = 0; i < nargs; i++)
|
|
|
4153 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
4154
|
|
|
4155 return Qnil;
|
|
|
4156 }
|
|
|
4157
|
|
|
4158 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
4159 Run HOOK with the specified arguments ARGS.
|
|
|
4160 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
4161 value, that value may be a function or a list of functions to be
|
|
|
4162 called to run the hook. If the value is a function, it is called with
|
|
|
4163 the given arguments and its return value is returned. If it is a list
|
|
|
4164 of functions, those functions are called, in order,
|
|
|
4165 with the given arguments ARGS.
|
|
444
|
4166 It is best not to depend on the value returned by `run-hook-with-args',
|
|
428
|
4167 as that may change.
|
|
|
4168
|
|
|
4169 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4170 not `make-local-variable'.
|
|
|
4171 */
|
|
|
4172 (int nargs, Lisp_Object *args))
|
|
|
4173 {
|
|
|
4174 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4175 }
|
|
|
4176
|
|
|
4177 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
4178 Run HOOK with the specified arguments ARGS.
|
|
|
4179 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4180 be a list of functions. We call those functions, one by one,
|
|
|
4181 passing arguments ARGS to each of them, until one of them
|
|
|
4182 returns a non-nil value. Then we return that value.
|
|
|
4183 If all the functions return nil, we return nil.
|
|
|
4184
|
|
|
4185 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4186 not `make-local-variable'.
|
|
|
4187 */
|
|
|
4188 (int nargs, Lisp_Object *args))
|
|
|
4189 {
|
|
|
4190 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
4191 }
|
|
|
4192
|
|
|
4193 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
4194 Run HOOK with the specified arguments ARGS.
|
|
|
4195 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4196 be a list of functions. We call those functions, one by one,
|
|
|
4197 passing arguments ARGS to each of them, until one of them
|
|
|
4198 returns nil. Then we return nil.
|
|
|
4199 If all the functions return non-nil, we return non-nil.
|
|
|
4200
|
|
|
4201 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4202 not `make-local-variable'.
|
|
|
4203 */
|
|
|
4204 (int nargs, Lisp_Object *args))
|
|
|
4205 {
|
|
|
4206 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
4207 }
|
|
|
4208
|
|
|
4209 /* ARGS[0] should be a hook symbol.
|
|
|
4210 Call each of the functions in the hook value, passing each of them
|
|
|
4211 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
4212 COND specifies a condition to test after each call
|
|
|
4213 to decide whether to stop.
|
|
|
4214 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4215 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4216
|
|
|
4217 Lisp_Object
|
|
|
4218 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
4219 enum run_hooks_condition cond)
|
|
|
4220 {
|
|
|
4221 Lisp_Object sym, val, ret;
|
|
|
4222
|
|
|
4223 if (!initialized || preparing_for_armageddon)
|
|
|
4224 /* We need to bail out of here pronto. */
|
|
|
4225 return Qnil;
|
|
|
4226
|
|
|
4227 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
4228 will also be true unless something is really hosed. */
|
|
|
4229 assert (!gc_in_progress);
|
|
|
4230
|
|
|
4231 sym = args[0];
|
|
771
|
4232 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
428
|
4233 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
4234
|
|
|
4235 if (UNBOUNDP (val) || NILP (val))
|
|
|
4236 return ret;
|
|
|
4237 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
4238 {
|
|
|
4239 args[0] = val;
|
|
|
4240 return Ffuncall (nargs, args);
|
|
|
4241 }
|
|
|
4242 else
|
|
|
4243 {
|
|
|
4244 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4245 Lisp_Object globals = Qnil;
|
|
|
4246 GCPRO3 (sym, val, globals);
|
|
|
4247
|
|
|
4248 for (;
|
|
|
4249 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4250 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
4251 : !NILP (ret)));
|
|
|
4252 val = XCDR (val))
|
|
|
4253 {
|
|
|
4254 if (EQ (XCAR (val), Qt))
|
|
|
4255 {
|
|
|
4256 /* t indicates this hook has a local binding;
|
|
|
4257 it means to run the global binding too. */
|
|
|
4258 globals = Fdefault_value (sym);
|
|
|
4259
|
|
|
4260 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
4261 ! NILP (globals))
|
|
|
4262 {
|
|
|
4263 args[0] = globals;
|
|
|
4264 ret = Ffuncall (nargs, args);
|
|
|
4265 }
|
|
|
4266 else
|
|
|
4267 {
|
|
|
4268 for (;
|
|
|
4269 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4270 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
4271 ? NILP (ret)
|
|
|
4272 : !NILP (ret)));
|
|
|
4273 globals = XCDR (globals))
|
|
|
4274 {
|
|
|
4275 args[0] = XCAR (globals);
|
|
|
4276 /* In a global value, t should not occur. If it does, we
|
|
|
4277 must ignore it to avoid an endless loop. */
|
|
|
4278 if (!EQ (args[0], Qt))
|
|
|
4279 ret = Ffuncall (nargs, args);
|
|
|
4280 }
|
|
|
4281 }
|
|
|
4282 }
|
|
|
4283 else
|
|
|
4284 {
|
|
|
4285 args[0] = XCAR (val);
|
|
|
4286 ret = Ffuncall (nargs, args);
|
|
|
4287 }
|
|
|
4288 }
|
|
|
4289
|
|
|
4290 UNGCPRO;
|
|
|
4291 return ret;
|
|
|
4292 }
|
|
|
4293 }
|
|
|
4294
|
|
|
4295 Lisp_Object
|
|
|
4296 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
4297 enum run_hooks_condition cond)
|
|
|
4298 {
|
|
|
4299 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
4300 }
|
|
|
4301
|
|
|
4302 #if 0
|
|
|
4303
|
|
853
|
4304 /* From FSF 19.30, not currently used; seems like a big kludge. */
|
|
428
|
4305
|
|
|
4306 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
4307 present value of that symbol.
|
|
|
4308 Call each element of FUNLIST,
|
|
|
4309 passing each of them the rest of ARGS.
|
|
|
4310 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4311 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4312
|
|
|
4313 Lisp_Object
|
|
|
4314 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
4315 {
|
|
853
|
4316 omitted;
|
|
428
|
4317 }
|
|
|
4318
|
|
|
4319 #endif /* 0 */
|
|
|
4320
|
|
|
4321 void
|
|
|
4322 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
4323 {
|
|
|
4324 /* This function can GC */
|
|
|
4325 struct gcpro gcpro1;
|
|
|
4326 int i;
|
|
|
4327 va_list vargs;
|
|
|
4328 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4329
|
|
|
4330 va_start (vargs, nargs);
|
|
|
4331 funcall_args[0] = hook_var;
|
|
|
4332 for (i = 0; i < nargs; i++)
|
|
|
4333 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4334 va_end (vargs);
|
|
|
4335
|
|
|
4336 GCPRO1 (*funcall_args);
|
|
|
4337 gcpro1.nvars = nargs + 1;
|
|
|
4338 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4339 UNGCPRO;
|
|
|
4340 }
|
|
|
4341
|
|
|
4342 void
|
|
|
4343 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
4344 int nargs, ...)
|
|
|
4345 {
|
|
|
4346 /* This function can GC */
|
|
|
4347 struct gcpro gcpro1;
|
|
|
4348 int i;
|
|
|
4349 va_list vargs;
|
|
|
4350 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4351
|
|
|
4352 va_start (vargs, nargs);
|
|
|
4353 funcall_args[0] = hook_var;
|
|
|
4354 for (i = 0; i < nargs; i++)
|
|
|
4355 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4356 va_end (vargs);
|
|
|
4357
|
|
|
4358 GCPRO1 (*funcall_args);
|
|
|
4359 gcpro1.nvars = nargs + 1;
|
|
|
4360 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
4361 RUN_HOOKS_TO_COMPLETION);
|
|
|
4362 UNGCPRO;
|
|
|
4363 }
|
|
|
4364
|
|
|
4365 Lisp_Object
|
|
|
4366 run_hook (Lisp_Object hook)
|
|
|
4367 {
|
|
853
|
4368 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION);
|
|
428
|
4369 }
|
|
|
4370
|
|
|
4371
|
|
|
4372 /************************************************************************/
|
|
|
4373 /* Front-ends to eval, funcall, apply */
|
|
|
4374 /************************************************************************/
|
|
|
4375
|
|
|
4376 /* Apply fn to arg */
|
|
|
4377 Lisp_Object
|
|
|
4378 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
4379 {
|
|
|
4380 /* This function can GC */
|
|
|
4381 struct gcpro gcpro1;
|
|
|
4382 Lisp_Object args[2];
|
|
|
4383
|
|
|
4384 if (NILP (arg))
|
|
|
4385 return Ffuncall (1, &fn);
|
|
|
4386 GCPRO1 (args[0]);
|
|
|
4387 gcpro1.nvars = 2;
|
|
|
4388 args[0] = fn;
|
|
|
4389 args[1] = arg;
|
|
|
4390 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
4391 }
|
|
|
4392
|
|
|
4393 /* Call function fn on no arguments */
|
|
|
4394 Lisp_Object
|
|
|
4395 call0 (Lisp_Object fn)
|
|
|
4396 {
|
|
|
4397 /* This function can GC */
|
|
|
4398 struct gcpro gcpro1;
|
|
|
4399
|
|
|
4400 GCPRO1 (fn);
|
|
|
4401 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
4402 }
|
|
|
4403
|
|
|
4404 /* Call function fn with argument arg0 */
|
|
|
4405 Lisp_Object
|
|
|
4406 call1 (Lisp_Object fn,
|
|
|
4407 Lisp_Object arg0)
|
|
|
4408 {
|
|
|
4409 /* This function can GC */
|
|
|
4410 struct gcpro gcpro1;
|
|
|
4411 Lisp_Object args[2];
|
|
|
4412 args[0] = fn;
|
|
|
4413 args[1] = arg0;
|
|
|
4414 GCPRO1 (args[0]);
|
|
|
4415 gcpro1.nvars = 2;
|
|
|
4416 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
4417 }
|
|
|
4418
|
|
|
4419 /* Call function fn with arguments arg0, arg1 */
|
|
|
4420 Lisp_Object
|
|
|
4421 call2 (Lisp_Object fn,
|
|
|
4422 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4423 {
|
|
|
4424 /* This function can GC */
|
|
|
4425 struct gcpro gcpro1;
|
|
|
4426 Lisp_Object args[3];
|
|
|
4427 args[0] = fn;
|
|
|
4428 args[1] = arg0;
|
|
|
4429 args[2] = arg1;
|
|
|
4430 GCPRO1 (args[0]);
|
|
|
4431 gcpro1.nvars = 3;
|
|
|
4432 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4433 }
|
|
|
4434
|
|
|
4435 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4436 Lisp_Object
|
|
|
4437 call3 (Lisp_Object fn,
|
|
|
4438 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4439 {
|
|
|
4440 /* This function can GC */
|
|
|
4441 struct gcpro gcpro1;
|
|
|
4442 Lisp_Object args[4];
|
|
|
4443 args[0] = fn;
|
|
|
4444 args[1] = arg0;
|
|
|
4445 args[2] = arg1;
|
|
|
4446 args[3] = arg2;
|
|
|
4447 GCPRO1 (args[0]);
|
|
|
4448 gcpro1.nvars = 4;
|
|
|
4449 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4450 }
|
|
|
4451
|
|
|
4452 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4453 Lisp_Object
|
|
|
4454 call4 (Lisp_Object fn,
|
|
|
4455 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4456 Lisp_Object arg3)
|
|
|
4457 {
|
|
|
4458 /* This function can GC */
|
|
|
4459 struct gcpro gcpro1;
|
|
|
4460 Lisp_Object args[5];
|
|
|
4461 args[0] = fn;
|
|
|
4462 args[1] = arg0;
|
|
|
4463 args[2] = arg1;
|
|
|
4464 args[3] = arg2;
|
|
|
4465 args[4] = arg3;
|
|
|
4466 GCPRO1 (args[0]);
|
|
|
4467 gcpro1.nvars = 5;
|
|
|
4468 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4469 }
|
|
|
4470
|
|
|
4471 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4472 Lisp_Object
|
|
|
4473 call5 (Lisp_Object fn,
|
|
|
4474 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4475 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4476 {
|
|
|
4477 /* This function can GC */
|
|
|
4478 struct gcpro gcpro1;
|
|
|
4479 Lisp_Object args[6];
|
|
|
4480 args[0] = fn;
|
|
|
4481 args[1] = arg0;
|
|
|
4482 args[2] = arg1;
|
|
|
4483 args[3] = arg2;
|
|
|
4484 args[4] = arg3;
|
|
|
4485 args[5] = arg4;
|
|
|
4486 GCPRO1 (args[0]);
|
|
|
4487 gcpro1.nvars = 6;
|
|
|
4488 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4489 }
|
|
|
4490
|
|
|
4491 Lisp_Object
|
|
|
4492 call6 (Lisp_Object fn,
|
|
|
4493 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4494 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4495 {
|
|
|
4496 /* This function can GC */
|
|
|
4497 struct gcpro gcpro1;
|
|
|
4498 Lisp_Object args[7];
|
|
|
4499 args[0] = fn;
|
|
|
4500 args[1] = arg0;
|
|
|
4501 args[2] = arg1;
|
|
|
4502 args[3] = arg2;
|
|
|
4503 args[4] = arg3;
|
|
|
4504 args[5] = arg4;
|
|
|
4505 args[6] = arg5;
|
|
|
4506 GCPRO1 (args[0]);
|
|
|
4507 gcpro1.nvars = 7;
|
|
|
4508 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4509 }
|
|
|
4510
|
|
|
4511 Lisp_Object
|
|
|
4512 call7 (Lisp_Object fn,
|
|
|
4513 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4514 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4515 Lisp_Object arg6)
|
|
|
4516 {
|
|
|
4517 /* This function can GC */
|
|
|
4518 struct gcpro gcpro1;
|
|
|
4519 Lisp_Object args[8];
|
|
|
4520 args[0] = fn;
|
|
|
4521 args[1] = arg0;
|
|
|
4522 args[2] = arg1;
|
|
|
4523 args[3] = arg2;
|
|
|
4524 args[4] = arg3;
|
|
|
4525 args[5] = arg4;
|
|
|
4526 args[6] = arg5;
|
|
|
4527 args[7] = arg6;
|
|
|
4528 GCPRO1 (args[0]);
|
|
|
4529 gcpro1.nvars = 8;
|
|
|
4530 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4531 }
|
|
|
4532
|
|
|
4533 Lisp_Object
|
|
|
4534 call8 (Lisp_Object fn,
|
|
|
4535 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4536 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4537 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4538 {
|
|
|
4539 /* This function can GC */
|
|
|
4540 struct gcpro gcpro1;
|
|
|
4541 Lisp_Object args[9];
|
|
|
4542 args[0] = fn;
|
|
|
4543 args[1] = arg0;
|
|
|
4544 args[2] = arg1;
|
|
|
4545 args[3] = arg2;
|
|
|
4546 args[4] = arg3;
|
|
|
4547 args[5] = arg4;
|
|
|
4548 args[6] = arg5;
|
|
|
4549 args[7] = arg6;
|
|
|
4550 args[8] = arg7;
|
|
|
4551 GCPRO1 (args[0]);
|
|
|
4552 gcpro1.nvars = 9;
|
|
|
4553 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4554 }
|
|
|
4555
|
|
|
4556 Lisp_Object
|
|
|
4557 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4558 {
|
|
|
4559 if (current_buffer == buf)
|
|
|
4560 return call0 (fn);
|
|
|
4561 else
|
|
|
4562 {
|
|
|
4563 Lisp_Object val;
|
|
|
4564 int speccount = specpdl_depth();
|
|
|
4565 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4566 set_buffer_internal (buf);
|
|
|
4567 val = call0 (fn);
|
|
771
|
4568 unbind_to (speccount);
|
|
428
|
4569 return val;
|
|
|
4570 }
|
|
|
4571 }
|
|
|
4572
|
|
|
4573 Lisp_Object
|
|
|
4574 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4575 Lisp_Object arg0)
|
|
|
4576 {
|
|
|
4577 if (current_buffer == buf)
|
|
|
4578 return call1 (fn, arg0);
|
|
|
4579 else
|
|
|
4580 {
|
|
|
4581 Lisp_Object val;
|
|
|
4582 int speccount = specpdl_depth();
|
|
|
4583 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4584 set_buffer_internal (buf);
|
|
|
4585 val = call1 (fn, arg0);
|
|
771
|
4586 unbind_to (speccount);
|
|
428
|
4587 return val;
|
|
|
4588 }
|
|
|
4589 }
|
|
|
4590
|
|
|
4591 Lisp_Object
|
|
|
4592 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4593 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4594 {
|
|
|
4595 if (current_buffer == buf)
|
|
|
4596 return call2 (fn, arg0, arg1);
|
|
|
4597 else
|
|
|
4598 {
|
|
|
4599 Lisp_Object val;
|
|
|
4600 int speccount = specpdl_depth();
|
|
|
4601 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4602 set_buffer_internal (buf);
|
|
|
4603 val = call2 (fn, arg0, arg1);
|
|
771
|
4604 unbind_to (speccount);
|
|
428
|
4605 return val;
|
|
|
4606 }
|
|
|
4607 }
|
|
|
4608
|
|
|
4609 Lisp_Object
|
|
|
4610 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4611 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4612 {
|
|
|
4613 if (current_buffer == buf)
|
|
|
4614 return call3 (fn, arg0, arg1, arg2);
|
|
|
4615 else
|
|
|
4616 {
|
|
|
4617 Lisp_Object val;
|
|
|
4618 int speccount = specpdl_depth();
|
|
|
4619 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4620 set_buffer_internal (buf);
|
|
|
4621 val = call3 (fn, arg0, arg1, arg2);
|
|
771
|
4622 unbind_to (speccount);
|
|
428
|
4623 return val;
|
|
|
4624 }
|
|
|
4625 }
|
|
|
4626
|
|
|
4627 Lisp_Object
|
|
|
4628 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4629 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4630 Lisp_Object arg3)
|
|
|
4631 {
|
|
|
4632 if (current_buffer == buf)
|
|
|
4633 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4634 else
|
|
|
4635 {
|
|
|
4636 Lisp_Object val;
|
|
|
4637 int speccount = specpdl_depth();
|
|
|
4638 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4639 set_buffer_internal (buf);
|
|
|
4640 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
771
|
4641 unbind_to (speccount);
|
|
428
|
4642 return val;
|
|
|
4643 }
|
|
|
4644 }
|
|
|
4645
|
|
|
4646 Lisp_Object
|
|
|
4647 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4648 {
|
|
|
4649 if (current_buffer == buf)
|
|
|
4650 return Feval (form);
|
|
|
4651 else
|
|
|
4652 {
|
|
|
4653 Lisp_Object val;
|
|
|
4654 int speccount = specpdl_depth();
|
|
|
4655 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4656 set_buffer_internal (buf);
|
|
|
4657 val = Feval (form);
|
|
771
|
4658 unbind_to (speccount);
|
|
428
|
4659 return val;
|
|
|
4660 }
|
|
|
4661 }
|
|
|
4662
|
|
|
4663
|
|
|
4664 /************************************************************************/
|
|
|
4665 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4666 /************************************************************************/
|
|
|
4667
|
|
853
|
4668 int
|
|
|
4669 get_inhibit_flags (void)
|
|
|
4670 {
|
|
|
4671 return inhibit_flags;
|
|
|
4672 }
|
|
|
4673
|
|
|
4674 void
|
|
|
4675 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object prop)
|
|
|
4676 {
|
|
|
4677 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4678 {
|
|
|
4679 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj)
|
|
|
4680 && NILP (memq_no_quit (obj, Vmodifiable_buffers)))
|
|
|
4681 invalid_change
|
|
|
4682 ("Modification of this buffer not currently permitted", obj);
|
|
|
4683 }
|
|
|
4684 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4685 {
|
|
|
4686 if (what == OPERATION_DELETE_OBJECT
|
|
|
4687 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4688 || CONSOLEP (obj))
|
|
|
4689 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects)))
|
|
|
4690 invalid_change
|
|
|
4691 ("Deletion of this object not currently permitted", obj);
|
|
|
4692 }
|
|
|
4693 }
|
|
|
4694
|
|
|
4695 void
|
|
|
4696 note_object_created (Lisp_Object obj)
|
|
|
4697 {
|
|
|
4698 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4699 {
|
|
|
4700 if (BUFFERP (obj))
|
|
|
4701 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers);
|
|
|
4702 }
|
|
|
4703 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4704 {
|
|
|
4705 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4706 || CONSOLEP (obj))
|
|
|
4707 Vdeletable_permanent_display_objects =
|
|
|
4708 Fcons (obj, Vdeletable_permanent_display_objects);
|
|
|
4709 }
|
|
|
4710 }
|
|
|
4711
|
|
|
4712 void
|
|
|
4713 note_object_deleted (Lisp_Object obj)
|
|
|
4714 {
|
|
|
4715 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4716 {
|
|
|
4717 if (BUFFERP (obj))
|
|
|
4718 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers);
|
|
|
4719 }
|
|
|
4720 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4721 {
|
|
|
4722 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4723 || CONSOLEP (obj))
|
|
|
4724 Vdeletable_permanent_display_objects =
|
|
|
4725 delq_no_quit (obj, Vdeletable_permanent_display_objects);
|
|
|
4726 }
|
|
|
4727 }
|
|
|
4728
|
|
|
4729 struct call_trapping_problems
|
|
|
4730 {
|
|
|
4731 Lisp_Object catchtag;
|
|
|
4732 Lisp_Object error_conditions;
|
|
|
4733 Lisp_Object data;
|
|
|
4734 Lisp_Object backtrace;
|
|
|
4735 Lisp_Object warning_class;
|
|
|
4736
|
|
867
|
4737 const CIbyte *warning_string;
|
|
853
|
4738 Lisp_Object (*fun) (void *);
|
|
|
4739 void *arg;
|
|
|
4740 };
|
|
428
|
4741
|
|
|
4742 static Lisp_Object
|
|
853
|
4743 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data,
|
|
|
4744 Lisp_Object opaque)
|
|
|
4745 {
|
|
|
4746 struct call_trapping_problems *p =
|
|
|
4747 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4748 struct gcpro gcpro1;
|
|
|
4749 Lisp_Object lstream = Qnil;
|
|
|
4750 Lisp_Object errstr;
|
|
|
4751 int speccount = specpdl_depth ();
|
|
|
4752
|
|
|
4753 if (! (inhibit_flags & INHIBIT_WARNING_ISSUE))
|
|
428
|
4754 {
|
|
853
|
4755 /* We're no longer protected against errors or quit here, so at
|
|
|
4756 least let's temporarily inhibit quit. We definitely do not
|
|
|
4757 want to inhibit quit during the calling of the function
|
|
|
4758 itself!!!!!!!!!!! */
|
|
|
4759
|
|
|
4760 specbind (Qinhibit_quit, Qt);
|
|
|
4761
|
|
|
4762 GCPRO1 (lstream);
|
|
|
4763 lstream = make_resizing_buffer_output_stream ();
|
|
|
4764 Fbacktrace (lstream, Qt);
|
|
|
4765 Lstream_flush (XLSTREAM (lstream));
|
|
|
4766 p->backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream));
|
|
|
4767 Lstream_delete (XLSTREAM (lstream));
|
|
|
4768 UNGCPRO;
|
|
|
4769
|
|
428
|
4770 /* #### This should call
|
|
853
|
4771 (with-output-to-string (display-error (cons error_conditions data))
|
|
428
|
4772 but that stuff is all in Lisp currently. */
|
|
853
|
4773 errstr =
|
|
|
4774 emacs_sprintf_string_lisp
|
|
|
4775 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s",
|
|
|
4776 Qnil, 4,
|
|
|
4777 build_msg_string (p->warning_string ? p->warning_string : "error"),
|
|
|
4778 error_conditions, data, p->backtrace);
|
|
|
4779
|
|
|
4780 warn_when_safe_lispobj (p->warning_class, current_warning_level (),
|
|
|
4781 errstr);
|
|
|
4782
|
|
|
4783 unbind_to (speccount);
|
|
|
4784
|
|
428
|
4785 }
|
|
853
|
4786 else
|
|
|
4787 p->backtrace = Qnil;
|
|
|
4788
|
|
|
4789 p->error_conditions = error_conditions;
|
|
|
4790 p->data = data;
|
|
|
4791
|
|
|
4792 Fthrow (p->catchtag, Qnil);
|
|
|
4793 return Qnil; /* not reached */
|
|
|
4794 }
|
|
|
4795
|
|
|
4796 static Lisp_Object
|
|
|
4797 call_trapping_problems_2 (Lisp_Object opaque)
|
|
|
4798 {
|
|
|
4799 struct call_trapping_problems *p =
|
|
|
4800 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4801
|
|
|
4802 return (p->fun) (p->arg);
|
|
428
|
4803 }
|
|
|
4804
|
|
|
4805 static Lisp_Object
|
|
853
|
4806 call_trapping_problems_1 (Lisp_Object opaque)
|
|
|
4807 {
|
|
|
4808 return call_with_condition_handler (flagged_a_squirmer, opaque,
|
|
|
4809 call_trapping_problems_2, opaque);
|
|
|
4810 }
|
|
|
4811
|
|
|
4812 /* This is equivalent to (*fun) (arg), except that various conditions
|
|
|
4813 can be trapped or inhibited, according to FLAGS.
|
|
|
4814
|
|
|
4815 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs,
|
|
|
4816 the error is caught and a warning is issued, specifying the
|
|
|
4817 specific error that occurred and a backtrace. In that case,
|
|
|
4818 WARNING_STRING should be given, and will be printed at the
|
|
|
4819 beginning of the error to indicate where the error occurred.
|
|
|
4820
|
|
|
4821 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to
|
|
|
4822 `throw' out of the function being called are trapped, and a warning
|
|
|
4823 issued. (Again, WARNING_STRING should be given.)
|
|
|
4824
|
|
|
4825 (If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued;
|
|
|
4826 this applies to recursive invocations of call_trapping_problems, too.
|
|
|
4827
|
|
|
4828 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be
|
|
|
4829 issued, but at level `debug', which normally is below the minimum
|
|
|
4830 specified by `log-warning-minimum-level', meaning such warnings will
|
|
|
4831 be ignored entirely. The user can change this variable, however,
|
|
|
4832 to see the warnings.)
|
|
|
4833
|
|
|
4834 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is
|
|
|
4835 given, you are *guaranteed* that there will be no non-local exits
|
|
|
4836 out of this function.
|
|
|
4837
|
|
|
4838 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This
|
|
|
4839 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is
|
|
|
4840 automatically caught as well, and treated as an error; you can
|
|
|
4841 check for this using EQ (problems->error_conditions, Qquit).
|
|
|
4842
|
|
|
4843 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly
|
|
|
4844 turned on. (It will abort the code being called, but will still be
|
|
|
4845 trapped and reported as an error, unless NO_INHIBIT_ERRORS is
|
|
|
4846 given.) This is useful when QUIT checking has been turned off by a
|
|
|
4847 higher-level caller.
|
|
|
4848
|
|
|
4849 If FLAGS contains INHIBIT_GC, garbage collection is inhibited.
|
|
|
4850 This is useful for Lisp called within redisplay or inside of the
|
|
|
4851 QUIT macro (where GC is generally not expected), for example.
|
|
|
4852
|
|
|
4853 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION,
|
|
|
4854 Lisp code is not allowed to delete any window, buffers, frames, devices,
|
|
|
4855 or consoles that were already in existence at the time this function
|
|
|
4856 was called. (However, it's perfectly legal for code to create a new
|
|
|
4857 buffer and then delete it.)
|
|
|
4858
|
|
|
4859 #### It might be useful to have a flag that inhibits deletion of a
|
|
|
4860 specific permanent display object and everything it's attached to
|
|
|
4861 (e.g. a window, and the buffer, frame, device, and console it's
|
|
|
4862 attached to.
|
|
|
4863
|
|
|
4864 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp
|
|
|
4865 code is not allowed to modify the text of any buffers that were
|
|
|
4866 already in existence at the time this function was called.
|
|
|
4867 (However, it's perfectly legal for code to create a new buffer and
|
|
|
4868 then modify its text.)
|
|
|
4869
|
|
|
4870 [These last two flags are implemented using global variables
|
|
|
4871 Vdeletable_permanent_display_objects and Vmodifiable_buffers,
|
|
|
4872 which keep track of a list of all buffers or permanent display
|
|
|
4873 objects created since the last time one of these flags was set.
|
|
|
4874 The code that deletes buffers, etc. and modifies buffers checks
|
|
|
4875
|
|
|
4876 (1) if the corresponding flag is set (through the global variable
|
|
|
4877 inhibit_flags or its accessor function get_inhibit_flags()), and
|
|
|
4878
|
|
|
4879 (2) if the object to be modified or deleted is not in the
|
|
|
4880 appropriate list.
|
|
|
4881
|
|
|
4882 If so, it signals an error.
|
|
|
4883
|
|
|
4884 Recursive calls to call_trapping_problems() are allowed. In
|
|
|
4885 the case of the two flags mentioned above, the current values
|
|
|
4886 of the global variables are stored in an unwind-protect, and
|
|
|
4887 they're reset to nil.]
|
|
|
4888
|
|
|
4889 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not
|
|
|
4890 be entered if an error occurs inside the Lisp code being called,
|
|
|
4891 even when the user has requested an error. In such case, a warning
|
|
|
4892 is issued stating that access to the debugger is denied, unless
|
|
|
4893 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when
|
|
|
4894 calling Lisp code inside redisplay, in menu callbacks, etc. because
|
|
|
4895 in such cases either the display is in an inconsistent state or
|
|
|
4896 doing window operations is explicitly forbidden by the OS, and the
|
|
|
4897 debugger would causes visual changes on the screen and might create
|
|
|
4898 another frame.
|
|
|
4899
|
|
|
4900 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no
|
|
|
4901 changes of any sort to extents, faces, glyphs, buffer text,
|
|
|
4902 specifiers relating to display, other variables relating to
|
|
|
4903 display, splitting, deleting, or resizing windows or frames,
|
|
|
4904 deleting buffers, windows, frames, devices, or consoles, etc. is
|
|
|
4905 allowed. This is for things called absolutely in the middle of
|
|
|
4906 redisplay, which expects things to be *exactly* the same after the
|
|
|
4907 call as before. This isn't completely implemented and needs to be
|
|
|
4908 thought out some more to determine exactly what its semantics are.
|
|
|
4909 For the moment, turning on this flag also turns on
|
|
|
4910
|
|
|
4911 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
4912 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
4913 INHIBIT_ENTERING_DEBUGGER
|
|
|
4914 INHIBIT_WARNING_ISSUE
|
|
|
4915 INHIBIT_GC
|
|
|
4916
|
|
|
4917 #### The following five flags are defined, but unimplemented:
|
|
|
4918
|
|
|
4919 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6)
|
|
|
4920 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7)
|
|
|
4921 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8)
|
|
|
4922 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9)
|
|
|
4923 #define INHIBIT_CHARSET_CREATION (1<<10)
|
|
|
4924
|
|
|
4925 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that
|
|
|
4926 call_with_suspended_errors() was invoked. This exists only for
|
|
|
4927 debugging purposes -- often we want to break when a signal happens,
|
|
|
4928 but ignore signals from call_with_suspended_errors(), because they
|
|
|
4929 occur often and for legitimate reasons.
|
|
|
4930
|
|
|
4931 If PROBLEM is non-zero, it should be a pointer to a structure into
|
|
|
4932 which exact information about any occurring problems (either an
|
|
|
4933 error or an attempted throw past this boundary).
|
|
|
4934
|
|
|
4935 If a problem occurred and aborted operation (error, quit, or
|
|
|
4936 invalid throw), Qunbound is returned. Otherwise the return value
|
|
|
4937 from the call to (*fun) (arg) is returned. */
|
|
|
4938
|
|
|
4939 Lisp_Object
|
|
|
4940 call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
4941 const CIbyte *warning_string,
|
|
853
|
4942 int flags,
|
|
|
4943 struct call_trapping_problems_result *problem,
|
|
|
4944 Lisp_Object (*fun) (void *),
|
|
|
4945 void *arg)
|
|
|
4946 {
|
|
|
4947 int speccount = specpdl_depth();
|
|
|
4948 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4949 struct call_trapping_problems package;
|
|
|
4950 Lisp_Object opaque, thrown_tag, tem;
|
|
|
4951 int thrown = 0;
|
|
|
4952
|
|
|
4953 assert (SYMBOLP (warning_class)); /* sanity-check */
|
|
|
4954 assert (!NILP (warning_class));
|
|
|
4955
|
|
|
4956 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS;
|
|
|
4957
|
|
|
4958 package.warning_class = warning_class;
|
|
|
4959 package.warning_string = warning_string;
|
|
|
4960 package.fun = fun;
|
|
|
4961 package.arg = arg;
|
|
|
4962 package.catchtag =
|
|
|
4963 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag :
|
|
|
4964 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) :
|
|
|
4965 Qnil;
|
|
|
4966 package.error_conditions = Qnil;
|
|
|
4967 package.data = Qnil;
|
|
|
4968 package.backtrace = Qnil;
|
|
|
4969
|
|
|
4970 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)
|
|
|
4971 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
4972 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
4973 | INHIBIT_ENTERING_DEBUGGER
|
|
|
4974 | INHIBIT_WARNING_ISSUE
|
|
|
4975 | INHIBIT_GC;
|
|
|
4976
|
|
|
4977 {
|
|
|
4978 int new_inhibit_flags = inhibit_flags | flags;
|
|
|
4979 if (new_inhibit_flags != inhibit_flags)
|
|
|
4980 internal_bind_int (&inhibit_flags, new_inhibit_flags);
|
|
|
4981 }
|
|
|
4982
|
|
|
4983 if (flags & INHIBIT_QUIT)
|
|
|
4984 specbind (Qinhibit_quit, Qt);
|
|
|
4985
|
|
|
4986 if (flags & UNINHIBIT_QUIT)
|
|
|
4987 begin_do_check_for_quit ();
|
|
|
4988
|
|
|
4989 if (flags & INHIBIT_GC)
|
|
|
4990 begin_gc_forbidden ();
|
|
|
4991
|
|
|
4992 /* #### If we have nested calls to call_trapping_problems(), and the
|
|
|
4993 inner one creates some buffers/etc., should the outer one be able
|
|
|
4994 to delete them? I think so, but it means we need to combine rather
|
|
|
4995 than just reset the value. */
|
|
|
4996 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4997 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil);
|
|
|
4998
|
|
|
4999 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
5000 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil);
|
|
|
5001
|
|
|
5002 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS))
|
|
|
5003 opaque = make_opaque_ptr (&package);
|
|
|
5004 else
|
|
|
5005 opaque = Qnil;
|
|
|
5006
|
|
|
5007 GCPRO5 (package.catchtag, package.error_conditions, package.data,
|
|
|
5008 package.backtrace, opaque);
|
|
|
5009
|
|
|
5010 if (flags & INTERNAL_INHIBIT_ERRORS)
|
|
|
5011 /* We need a catch so that our condition-handler can throw back here
|
|
|
5012 after printing the warning. (We print the warning in the stack
|
|
|
5013 context of the error, so we can get a backtrace.) */
|
|
|
5014 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque,
|
|
|
5015 &thrown, &thrown_tag);
|
|
|
5016 else if (flags & INTERNAL_INHIBIT_THROWS)
|
|
|
5017 /* We skip over the first wrapper, which traps errors. */
|
|
|
5018 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque,
|
|
|
5019 &thrown, &thrown_tag);
|
|
|
5020 else
|
|
|
5021 /* Nothing special. */
|
|
|
5022 tem = (fun) (arg);
|
|
|
5023
|
|
|
5024 if (thrown && !EQ (thrown_tag, package.catchtag)
|
|
|
5025 && (!flags & INHIBIT_WARNING_ISSUE))
|
|
|
5026 {
|
|
|
5027 Lisp_Object errstr;
|
|
|
5028
|
|
|
5029 if (!(flags & INHIBIT_QUIT))
|
|
|
5030 /* We're no longer protected against errors or quit here, so at
|
|
|
5031 least let's temporarily inhibit quit. */
|
|
|
5032 specbind (Qinhibit_quit, Qt);
|
|
|
5033 errstr =
|
|
|
5034 emacs_sprintf_string_lisp
|
|
|
5035 ("%s: Attempt to throw outside of function "
|
|
|
5036 "to catch `%s' with value `%s'",
|
|
|
5037 Qnil, 3, build_msg_string (warning_string ? warning_string : "error"),
|
|
|
5038 thrown_tag, tem);
|
|
|
5039
|
|
|
5040 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr);
|
|
|
5041 }
|
|
|
5042
|
|
|
5043 if (problem)
|
|
|
5044 {
|
|
|
5045 if (!thrown)
|
|
|
5046 {
|
|
|
5047 problem->caught_error = 0;
|
|
|
5048 problem->caught_throw = 0;
|
|
|
5049 problem->error_conditions = Qnil;
|
|
|
5050 problem->data = Qnil;
|
|
|
5051 problem->backtrace = Qnil;
|
|
|
5052 problem->thrown_tag = Qnil;
|
|
|
5053 problem->thrown_value = Qnil;
|
|
|
5054 }
|
|
|
5055 else if (EQ (thrown_tag, package.catchtag))
|
|
|
5056 {
|
|
|
5057 problem->caught_error = 1;
|
|
|
5058 problem->caught_throw = 0;
|
|
|
5059 problem->error_conditions = package.error_conditions;
|
|
|
5060 problem->data = package.data;
|
|
|
5061 problem->backtrace = package.backtrace;
|
|
|
5062 problem->thrown_tag = Qnil;
|
|
|
5063 problem->thrown_value = Qnil;
|
|
|
5064 }
|
|
|
5065 else
|
|
|
5066 {
|
|
|
5067 problem->caught_error = 0;
|
|
|
5068 problem->caught_throw = 1;
|
|
|
5069 problem->error_conditions = Qnil;
|
|
|
5070 problem->data = Qnil;
|
|
|
5071 problem->backtrace = Qnil;
|
|
|
5072 problem->thrown_tag = thrown_tag;
|
|
|
5073 problem->thrown_value = tem;
|
|
|
5074 }
|
|
|
5075 }
|
|
|
5076
|
|
|
5077 if (!NILP (package.catchtag) &&
|
|
|
5078 !EQ (package.catchtag, Vcatch_everything_tag))
|
|
|
5079 free_opaque_ptr (package.catchtag);
|
|
|
5080
|
|
|
5081 if (!NILP (opaque))
|
|
|
5082 free_opaque_ptr (opaque);
|
|
|
5083
|
|
|
5084 unbind_to (speccount);
|
|
|
5085 RETURN_UNGCPRO (thrown ? Qunbound : tem);
|
|
|
5086 }
|
|
|
5087
|
|
|
5088 struct va_call_trapping_problems
|
|
|
5089 {
|
|
|
5090 lisp_fn_t fun;
|
|
|
5091 int nargs;
|
|
|
5092 Lisp_Object *args;
|
|
|
5093 };
|
|
|
5094
|
|
|
5095 static Lisp_Object
|
|
|
5096 va_call_trapping_problems_1 (void *ai_mi_madre)
|
|
|
5097 {
|
|
|
5098 struct va_call_trapping_problems *ai_no_corrida =
|
|
|
5099 (struct va_call_trapping_problems *) ai_mi_madre;
|
|
|
5100 Lisp_Object pegar_no_bumbum;
|
|
|
5101
|
|
|
5102 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun,
|
|
|
5103 ai_no_corrida->args, ai_no_corrida->nargs);
|
|
|
5104 return pegar_no_bumbum;
|
|
|
5105 }
|
|
|
5106
|
|
|
5107 /* #### document me. */
|
|
|
5108
|
|
|
5109 Lisp_Object
|
|
|
5110 va_call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5111 const CIbyte *warning_string,
|
|
853
|
5112 int flags,
|
|
|
5113 struct call_trapping_problems_result *problem,
|
|
|
5114 lisp_fn_t fun, int nargs, ...)
|
|
|
5115 {
|
|
|
5116 va_list vargs;
|
|
|
5117 Lisp_Object args[20];
|
|
|
5118 int i;
|
|
|
5119 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5120 struct gcpro gcpro1;
|
|
|
5121
|
|
|
5122 assert (nargs >= 0 && nargs < 20);
|
|
|
5123
|
|
|
5124 va_start (vargs, nargs);
|
|
|
5125 for (i = 0; i < nargs; i++)
|
|
|
5126 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5127 va_end (vargs);
|
|
|
5128
|
|
|
5129 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5130 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5131 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5132
|
|
|
5133 GCPRO1_ARRAY (args, nargs);
|
|
|
5134 RETURN_UNGCPRO
|
|
|
5135 (call_trapping_problems
|
|
|
5136 (warning_class, warning_string, flags, problem,
|
|
|
5137 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas));
|
|
|
5138 }
|
|
|
5139
|
|
|
5140 /* this is an older interface, barely different from
|
|
|
5141 va_call_trapping_problems.
|
|
|
5142
|
|
|
5143 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into
|
|
|
5144 va_call_trapping_problems(). */
|
|
|
5145
|
|
|
5146 Lisp_Object
|
|
|
5147 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval,
|
|
|
5148 Lisp_Object class, Error_Behavior errb,
|
|
|
5149 int nargs, ...)
|
|
|
5150 {
|
|
|
5151 va_list vargs;
|
|
|
5152 Lisp_Object args[20];
|
|
|
5153 int i;
|
|
|
5154 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5155 int flags;
|
|
|
5156 struct gcpro gcpro1;
|
|
|
5157
|
|
|
5158 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
5159 assert (!NILP (class));
|
|
|
5160 assert (nargs >= 0 && nargs < 20);
|
|
|
5161
|
|
|
5162 va_start (vargs, nargs);
|
|
|
5163 for (i = 0; i < nargs; i++)
|
|
|
5164 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5165 va_end (vargs);
|
|
|
5166
|
|
|
5167 /* If error-checking is not disabled, just call the function. */
|
|
|
5168
|
|
|
5169 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
5170 {
|
|
|
5171 Lisp_Object val;
|
|
|
5172 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
5173 return val;
|
|
|
5174 }
|
|
|
5175
|
|
|
5176 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
5177 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5178 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
5179 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5180 else
|
|
|
5181 {
|
|
|
5182 assert (ERRB_EQ (errb, ERROR_ME_WARN));
|
|
|
5183 flags = INHIBIT_ENTERING_DEBUGGER;
|
|
|
5184 }
|
|
|
5185
|
|
|
5186 flags |= CALL_WITH_SUSPENDED_ERRORS;
|
|
|
5187
|
|
|
5188 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5189 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5190 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5191
|
|
|
5192 GCPRO1_ARRAY (args, nargs);
|
|
|
5193 {
|
|
|
5194 Lisp_Object its_way_too_goddamn_late =
|
|
|
5195 call_trapping_problems
|
|
|
5196 (class, 0, flags, 0, va_call_trapping_problems_1,
|
|
|
5197 &fazer_invocacao_atrapalhando_problemas);
|
|
|
5198 UNGCPRO;
|
|
|
5199 if (UNBOUNDP (its_way_too_goddamn_late))
|
|
|
5200 return retval;
|
|
|
5201 else
|
|
|
5202 return its_way_too_goddamn_late;
|
|
|
5203 }
|
|
|
5204 }
|
|
|
5205
|
|
|
5206 struct calln_trapping_problems
|
|
|
5207 {
|
|
|
5208 int nargs;
|
|
|
5209 Lisp_Object *args;
|
|
|
5210 };
|
|
|
5211
|
|
|
5212 static Lisp_Object
|
|
|
5213 calln_trapping_problems_1 (void *puta)
|
|
|
5214 {
|
|
|
5215 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta;
|
|
|
5216
|
|
|
5217 return Ffuncall (p->nargs, p->args);
|
|
428
|
5218 }
|
|
|
5219
|
|
|
5220 static Lisp_Object
|
|
853
|
5221 calln_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5222 const CIbyte *warning_string, int flags,
|
|
853
|
5223 struct call_trapping_problems_result *problem,
|
|
|
5224 int nargs, Lisp_Object *args)
|
|
|
5225 {
|
|
|
5226 struct calln_trapping_problems foo;
|
|
|
5227 struct gcpro gcpro1;
|
|
|
5228
|
|
|
5229 if (SYMBOLP (args[0]))
|
|
|
5230 {
|
|
|
5231 Lisp_Object tem = XSYMBOL (args[0])->function;
|
|
|
5232 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5233 {
|
|
|
5234 if (problem)
|
|
|
5235 {
|
|
|
5236 problem->caught_error = 0;
|
|
|
5237 problem->caught_throw = 0;
|
|
|
5238 problem->error_conditions = Qnil;
|
|
|
5239 problem->data = Qnil;
|
|
|
5240 problem->backtrace = Qnil;
|
|
|
5241 problem->thrown_tag = Qnil;
|
|
|
5242 problem->thrown_value = Qnil;
|
|
|
5243 }
|
|
|
5244 return Qnil;
|
|
|
5245 }
|
|
|
5246 }
|
|
|
5247
|
|
|
5248 foo.nargs = nargs;
|
|
|
5249 foo.args = args;
|
|
|
5250
|
|
|
5251 GCPRO1_ARRAY (args, nargs);
|
|
|
5252 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string,
|
|
|
5253 flags, problem,
|
|
|
5254 calln_trapping_problems_1,
|
|
|
5255 &foo));
|
|
|
5256 }
|
|
|
5257
|
|
|
5258 /* #### fix these functions to follow the calling convention of
|
|
|
5259 call_trapping_problems! */
|
|
|
5260
|
|
|
5261 Lisp_Object
|
|
867
|
5262 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5263 int flags)
|
|
|
5264 {
|
|
|
5265 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1,
|
|
|
5266 &function);
|
|
428
|
5267 }
|
|
|
5268
|
|
|
5269 Lisp_Object
|
|
867
|
5270 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5271 Lisp_Object object, int flags)
|
|
|
5272 {
|
|
|
5273 Lisp_Object args[2];
|
|
|
5274
|
|
|
5275 args[0] = function;
|
|
|
5276 args[1] = object;
|
|
|
5277
|
|
|
5278 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2,
|
|
|
5279 args);
|
|
|
5280 }
|
|
|
5281
|
|
|
5282 Lisp_Object
|
|
867
|
5283 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5284 Lisp_Object object1, Lisp_Object object2,
|
|
|
5285 int flags)
|
|
|
5286 {
|
|
|
5287 Lisp_Object args[3];
|
|
|
5288
|
|
|
5289 args[0] = function;
|
|
|
5290 args[1] = object1;
|
|
|
5291 args[2] = object2;
|
|
|
5292
|
|
|
5293 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3,
|
|
|
5294 args);
|
|
|
5295 }
|
|
|
5296
|
|
|
5297 Lisp_Object
|
|
867
|
5298 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5299 Lisp_Object object1, Lisp_Object object2,
|
|
|
5300 Lisp_Object object3, int flags)
|
|
|
5301 {
|
|
|
5302 Lisp_Object args[4];
|
|
|
5303
|
|
|
5304 args[0] = function;
|
|
|
5305 args[1] = object1;
|
|
|
5306 args[2] = object2;
|
|
|
5307 args[3] = object3;
|
|
|
5308
|
|
|
5309 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4,
|
|
|
5310 args);
|
|
|
5311 }
|
|
|
5312
|
|
|
5313 Lisp_Object
|
|
867
|
5314 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5315 Lisp_Object object1, Lisp_Object object2,
|
|
|
5316 Lisp_Object object3, Lisp_Object object4,
|
|
|
5317 int flags)
|
|
|
5318 {
|
|
|
5319 Lisp_Object args[5];
|
|
|
5320
|
|
|
5321 args[0] = function;
|
|
|
5322 args[1] = object1;
|
|
|
5323 args[2] = object2;
|
|
|
5324 args[3] = object3;
|
|
|
5325 args[4] = object4;
|
|
|
5326
|
|
|
5327 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5,
|
|
|
5328 args);
|
|
|
5329 }
|
|
|
5330
|
|
|
5331 Lisp_Object
|
|
867
|
5332 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5333 Lisp_Object object1, Lisp_Object object2,
|
|
|
5334 Lisp_Object object3, Lisp_Object object4,
|
|
|
5335 Lisp_Object object5, int flags)
|
|
|
5336 {
|
|
|
5337 Lisp_Object args[6];
|
|
|
5338
|
|
|
5339 args[0] = function;
|
|
|
5340 args[1] = object1;
|
|
|
5341 args[2] = object2;
|
|
|
5342 args[3] = object3;
|
|
|
5343 args[4] = object4;
|
|
|
5344 args[5] = object5;
|
|
|
5345
|
|
|
5346 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6,
|
|
|
5347 args);
|
|
|
5348 }
|
|
|
5349
|
|
|
5350 struct eval_in_buffer_trapping_problems
|
|
|
5351 {
|
|
|
5352 struct buffer *buf;
|
|
|
5353 Lisp_Object form;
|
|
|
5354 };
|
|
|
5355
|
|
|
5356 static Lisp_Object
|
|
|
5357 eval_in_buffer_trapping_problems_1 (void *arg)
|
|
|
5358 {
|
|
|
5359 struct eval_in_buffer_trapping_problems *p =
|
|
|
5360 (struct eval_in_buffer_trapping_problems *) arg;
|
|
|
5361
|
|
|
5362 return eval_in_buffer (p->buf, p->form);
|
|
|
5363 }
|
|
|
5364
|
|
|
5365 /* #### fix these functions to follow the calling convention of
|
|
|
5366 call_trapping_problems! */
|
|
|
5367
|
|
|
5368 Lisp_Object
|
|
867
|
5369 eval_in_buffer_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5370 struct buffer *buf, Lisp_Object form,
|
|
|
5371 int flags)
|
|
|
5372 {
|
|
|
5373 struct eval_in_buffer_trapping_problems p;
|
|
|
5374 Lisp_Object buffer = wrap_buffer (buf);
|
|
428
|
5375 struct gcpro gcpro1, gcpro2;
|
|
|
5376
|
|
853
|
5377 GCPRO2 (buffer, form);
|
|
|
5378 p.buf = buf;
|
|
|
5379 p.form = form;
|
|
|
5380 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0,
|
|
|
5381 eval_in_buffer_trapping_problems_1,
|
|
|
5382 &p));
|
|
|
5383 }
|
|
|
5384
|
|
|
5385 Lisp_Object
|
|
867
|
5386 run_hook_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5387 Lisp_Object hook_symbol,
|
|
|
5388 int flags)
|
|
|
5389 {
|
|
|
5390 return run_hook_with_args_trapping_problems (warning_string, 1, &hook_symbol,
|
|
|
5391 RUN_HOOKS_TO_COMPLETION,
|
|
|
5392 flags);
|
|
428
|
5393 }
|
|
|
5394
|
|
|
5395 static Lisp_Object
|
|
853
|
5396 safe_run_hook_trapping_problems_1 (void *puta)
|
|
|
5397 {
|
|
|
5398 Lisp_Object hook = VOID_TO_LISP (puta);
|
|
|
5399
|
|
|
5400 run_hook (hook);
|
|
428
|
5401 return Qnil;
|
|
|
5402 }
|
|
|
5403
|
|
853
|
5404 /* Same as run_hook_trapping_problems() but also set the hook to nil
|
|
|
5405 if an error occurs (but not a quit). */
|
|
|
5406
|
|
428
|
5407 Lisp_Object
|
|
867
|
5408 safe_run_hook_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5409 Lisp_Object hook_symbol,
|
|
|
5410 int flags)
|
|
|
5411 {
|
|
428
|
5412 Lisp_Object tem;
|
|
853
|
5413 struct gcpro gcpro1, gcpro2;
|
|
|
5414 struct call_trapping_problems_result prob;
|
|
428
|
5415
|
|
|
5416 if (!initialized || preparing_for_armageddon)
|
|
|
5417 return Qnil;
|
|
|
5418 tem = find_symbol_value (hook_symbol);
|
|
|
5419 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5420 return Qnil;
|
|
|
5421
|
|
853
|
5422 GCPRO2 (hook_symbol, tem);
|
|
|
5423 tem = call_trapping_problems (Qerror, warning_string, flags,
|
|
|
5424 &prob,
|
|
|
5425 safe_run_hook_trapping_problems_1,
|
|
|
5426 LISP_TO_VOID (hook_symbol));
|
|
|
5427 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions,
|
|
|
5428 Qquit)))
|
|
|
5429 Fset (hook_symbol, Qnil);
|
|
|
5430 RETURN_UNGCPRO (tem);
|
|
|
5431 }
|
|
|
5432
|
|
|
5433 struct run_hook_with_args_in_buffer_trapping_problems
|
|
|
5434 {
|
|
|
5435 struct buffer *buf;
|
|
|
5436 int nargs;
|
|
|
5437 Lisp_Object *args;
|
|
|
5438 enum run_hooks_condition cond;
|
|
|
5439 };
|
|
|
5440
|
|
|
5441 static Lisp_Object
|
|
|
5442 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta)
|
|
|
5443 {
|
|
|
5444 struct run_hook_with_args_in_buffer_trapping_problems *porra =
|
|
|
5445 (struct run_hook_with_args_in_buffer_trapping_problems *) puta;
|
|
|
5446
|
|
|
5447 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args,
|
|
|
5448 porra->cond);
|
|
|
5449 }
|
|
|
5450
|
|
|
5451 /* #### fix these functions to follow the calling convention of
|
|
|
5452 call_trapping_problems! */
|
|
428
|
5453
|
|
|
5454 Lisp_Object
|
|
867
|
5455 run_hook_with_args_in_buffer_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5456 struct buffer *buf, int nargs,
|
|
|
5457 Lisp_Object *args,
|
|
|
5458 enum run_hooks_condition cond,
|
|
|
5459 int flags)
|
|
|
5460 {
|
|
|
5461 Lisp_Object sym, val, ret;
|
|
|
5462 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust;
|
|
428
|
5463 struct gcpro gcpro1;
|
|
|
5464
|
|
|
5465 if (!initialized || preparing_for_armageddon)
|
|
853
|
5466 /* We need to bail out of here pronto. */
|
|
428
|
5467 return Qnil;
|
|
|
5468
|
|
853
|
5469 GCPRO1_ARRAY (args, nargs);
|
|
|
5470
|
|
|
5471 sym = args[0];
|
|
|
5472 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
|
5473 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
5474
|
|
|
5475 if (UNBOUNDP (val) || NILP (val))
|
|
|
5476 RETURN_UNGCPRO (ret);
|
|
|
5477
|
|
|
5478 diversity_and_distrust.buf = buf;
|
|
|
5479 diversity_and_distrust.nargs = nargs;
|
|
|
5480 diversity_and_distrust.args = args;
|
|
|
5481 diversity_and_distrust.cond = cond;
|
|
|
5482
|
|
|
5483 RETURN_UNGCPRO
|
|
|
5484 (call_trapping_problems
|
|
|
5485 (Qerror, warning_string,
|
|
|
5486 flags, 0,
|
|
|
5487 run_hook_with_args_in_buffer_trapping_problems_1,
|
|
|
5488 &diversity_and_distrust));
|
|
428
|
5489 }
|
|
|
5490
|
|
|
5491 Lisp_Object
|
|
867
|
5492 run_hook_with_args_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5493 int nargs,
|
|
|
5494 Lisp_Object *args,
|
|
|
5495 enum run_hooks_condition cond,
|
|
|
5496 int flags)
|
|
|
5497 {
|
|
|
5498 return run_hook_with_args_in_buffer_trapping_problems
|
|
|
5499 (warning_string, current_buffer, nargs, args, cond, flags);
|
|
428
|
5500 }
|
|
|
5501
|
|
|
5502 Lisp_Object
|
|
867
|
5503 va_run_hook_with_args_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5504 Lisp_Object hook_var,
|
|
|
5505 int nargs, ...)
|
|
|
5506 {
|
|
|
5507 /* This function can GC */
|
|
|
5508 struct gcpro gcpro1;
|
|
|
5509 int i;
|
|
|
5510 va_list vargs;
|
|
|
5511 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5512 int flags;
|
|
|
5513
|
|
|
5514 va_start (vargs, nargs);
|
|
|
5515 funcall_args[0] = hook_var;
|
|
|
5516 for (i = 0; i < nargs; i++)
|
|
|
5517 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5518 flags = va_arg (vargs, int);
|
|
|
5519 va_end (vargs);
|
|
|
5520
|
|
|
5521 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5522 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
|
5523 (warning_string, current_buffer, nargs + 1, funcall_args,
|
|
|
5524 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5525 }
|
|
|
5526
|
|
|
5527 Lisp_Object
|
|
867
|
5528 va_run_hook_with_args_in_buffer_trapping_problems (const CIbyte *
|
|
853
|
5529 warning_string,
|
|
|
5530 struct buffer *buf,
|
|
|
5531 Lisp_Object hook_var,
|
|
|
5532 int nargs, ...)
|
|
|
5533 {
|
|
|
5534 /* This function can GC */
|
|
|
5535 struct gcpro gcpro1;
|
|
|
5536 int i;
|
|
|
5537 va_list vargs;
|
|
|
5538 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5539 int flags;
|
|
|
5540
|
|
|
5541 va_start (vargs, nargs);
|
|
|
5542 funcall_args[0] = hook_var;
|
|
|
5543 for (i = 0; i < nargs; i++)
|
|
|
5544 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5545 flags = va_arg (vargs, int);
|
|
|
5546 va_end (vargs);
|
|
|
5547
|
|
|
5548 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5549 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
|
5550 (warning_string, buf, nargs + 1, funcall_args,
|
|
|
5551 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5552 }
|
|
|
5553
|
|
|
5554
|
|
|
5555 /************************************************************************/
|
|
|
5556 /* The special binding stack */
|
|
771
|
5557 /* Most C code should simply use specbind() and unbind_to_1(). */
|
|
428
|
5558 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
5559 /************************************************************************/
|
|
|
5560
|
|
|
5561 #define min_max_specpdl_size 400
|
|
|
5562
|
|
|
5563 void
|
|
647
|
5564 grow_specpdl (EMACS_INT reserved)
|
|
|
5565 {
|
|
|
5566 EMACS_INT size_needed = specpdl_depth() + reserved;
|
|
428
|
5567 if (size_needed >= max_specpdl_size)
|
|
|
5568 {
|
|
|
5569 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
5570 max_specpdl_size = min_max_specpdl_size;
|
|
|
5571 if (size_needed >= max_specpdl_size)
|
|
|
5572 {
|
|
|
5573 if (!NILP (Vdebug_on_error) ||
|
|
|
5574 !NILP (Vdebug_on_signal))
|
|
|
5575 /* Leave room for some specpdl in the debugger. */
|
|
|
5576 max_specpdl_size = size_needed + 100;
|
|
563
|
5577 signal_continuable_error
|
|
|
5578 (Qstack_overflow,
|
|
|
5579 "Variable binding depth exceeds max-specpdl-size", Qunbound);
|
|
428
|
5580 }
|
|
|
5581 }
|
|
|
5582 while (specpdl_size < size_needed)
|
|
|
5583 {
|
|
|
5584 specpdl_size *= 2;
|
|
|
5585 if (specpdl_size > max_specpdl_size)
|
|
|
5586 specpdl_size = max_specpdl_size;
|
|
|
5587 }
|
|
|
5588 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
5589 specpdl_ptr = specpdl + specpdl_depth();
|
|
853
|
5590 check_specbind_stack_sanity ();
|
|
428
|
5591 }
|
|
|
5592
|
|
|
5593
|
|
|
5594 /* Handle unbinding buffer-local variables */
|
|
|
5595 static Lisp_Object
|
|
|
5596 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
5597 {
|
|
|
5598 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5599 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
853
|
5600 Lisp_Object victim = ovalue;
|
|
|
5601 Lisp_Object buf = get_buffer (XCAR (victim), 0);
|
|
|
5602 ovalue = XCDR (victim);
|
|
428
|
5603
|
|
|
5604 free_cons (victim);
|
|
|
5605
|
|
|
5606 if (NILP (buf))
|
|
|
5607 {
|
|
|
5608 /* Deleted buffer -- do nothing */
|
|
|
5609 }
|
|
|
5610 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
5611 {
|
|
|
5612 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5613 * (kill-local-variable can do this.)
|
|
|
5614 * Do nothing in this case.
|
|
|
5615 */
|
|
|
5616 }
|
|
|
5617 else if (EQ (buf, current))
|
|
|
5618 Fset (symbol, ovalue);
|
|
|
5619 else
|
|
|
5620 {
|
|
|
5621 /* Urk! Somebody switched buffers */
|
|
|
5622 struct gcpro gcpro1;
|
|
|
5623 GCPRO1 (current);
|
|
|
5624 Fset_buffer (buf);
|
|
|
5625 Fset (symbol, ovalue);
|
|
|
5626 Fset_buffer (current);
|
|
|
5627 UNGCPRO;
|
|
|
5628 }
|
|
|
5629 return symbol;
|
|
|
5630 }
|
|
|
5631
|
|
|
5632 static Lisp_Object
|
|
|
5633 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
5634 {
|
|
|
5635 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5636 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
5637
|
|
|
5638 buffer = get_buffer (buffer, 0);
|
|
|
5639 if (NILP (buffer))
|
|
|
5640 {
|
|
|
5641 /* Deleted buffer -- do nothing */
|
|
|
5642 }
|
|
|
5643 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
5644 {
|
|
|
5645 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5646 * (kill-local-variable can do this.)
|
|
|
5647 * Do nothing in this case.
|
|
|
5648 */
|
|
|
5649 }
|
|
|
5650 else if (EQ (buffer, current))
|
|
|
5651 Fkill_local_variable (symbol);
|
|
|
5652 else
|
|
|
5653 {
|
|
|
5654 /* Urk! Somebody switched buffers */
|
|
|
5655 struct gcpro gcpro1;
|
|
|
5656 GCPRO1 (current);
|
|
|
5657 Fset_buffer (buffer);
|
|
|
5658 Fkill_local_variable (symbol);
|
|
|
5659 Fset_buffer (current);
|
|
|
5660 UNGCPRO;
|
|
|
5661 }
|
|
|
5662 return symbol;
|
|
|
5663 }
|
|
|
5664
|
|
|
5665
|
|
|
5666 void
|
|
|
5667 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
5668 {
|
|
|
5669 SPECBIND (symbol, value);
|
|
853
|
5670
|
|
|
5671 check_specbind_stack_sanity ();
|
|
428
|
5672 }
|
|
|
5673
|
|
|
5674 void
|
|
|
5675 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
5676 {
|
|
|
5677 int buffer_local =
|
|
|
5678 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
5679
|
|
|
5680 if (buffer_local == 0)
|
|
|
5681 {
|
|
|
5682 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
771
|
5683 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */
|
|
428
|
5684 }
|
|
|
5685 else if (buffer_local > 0)
|
|
|
5686 {
|
|
|
5687 /* Already buffer-local */
|
|
|
5688 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
5689 find_symbol_value (symbol));
|
|
|
5690 specpdl_ptr->func = specbind_unwind_local;
|
|
|
5691 }
|
|
|
5692 else
|
|
|
5693 {
|
|
|
5694 /* About to become buffer-local */
|
|
|
5695 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
5696 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
5697 }
|
|
|
5698
|
|
|
5699 specpdl_ptr->symbol = symbol;
|
|
|
5700 specpdl_ptr++;
|
|
|
5701 specpdl_depth_counter++;
|
|
|
5702
|
|
|
5703 Fset (symbol, value);
|
|
853
|
5704
|
|
|
5705 check_specbind_stack_sanity ();
|
|
428
|
5706 }
|
|
|
5707
|
|
771
|
5708 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter
|
|
|
5709 whether a normal or non-local exit occurs. (You need to call unbind_to_1()
|
|
|
5710 before your function returns normally, passing in the integer returned
|
|
|
5711 by this function.) Note: As long as the unwind-protect exists, ARG is
|
|
|
5712 automatically GCPRO'd. The return value from FUNCTION is completely
|
|
|
5713 ignored. #### We should eliminate it entirely. */
|
|
|
5714
|
|
|
5715 int
|
|
428
|
5716 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
5717 Lisp_Object arg)
|
|
|
5718 {
|
|
|
5719 SPECPDL_RESERVE (1);
|
|
|
5720 specpdl_ptr->func = function;
|
|
|
5721 specpdl_ptr->symbol = Qnil;
|
|
|
5722 specpdl_ptr->old_value = arg;
|
|
|
5723 specpdl_ptr++;
|
|
|
5724 specpdl_depth_counter++;
|
|
853
|
5725 check_specbind_stack_sanity ();
|
|
771
|
5726 return specpdl_depth_counter - 1;
|
|
|
5727 }
|
|
|
5728
|
|
|
5729 static Lisp_Object
|
|
802
|
5730 restore_lisp_object (Lisp_Object cons)
|
|
|
5731 {
|
|
|
5732 Lisp_Object opaque = XCAR (cons);
|
|
|
5733 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque);
|
|
|
5734 *addr = XCDR (cons);
|
|
|
5735 free_opaque_ptr (opaque);
|
|
853
|
5736 free_cons (cons);
|
|
802
|
5737 return Qnil;
|
|
|
5738 }
|
|
|
5739
|
|
|
5740 /* Establish an unwind-protect which will restore the Lisp_Object pointed to
|
|
|
5741 by ADDR with the value VAL. */
|
|
814
|
5742 static int
|
|
802
|
5743 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr,
|
|
|
5744 Lisp_Object val)
|
|
|
5745 {
|
|
|
5746 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
5747 return record_unwind_protect (restore_lisp_object,
|
|
|
5748 noseeum_cons (opaque, val));
|
|
|
5749 }
|
|
|
5750
|
|
|
5751 /* Similar to specbind() but for any C variable whose value is a
|
|
|
5752 Lisp_Object. Sets up an unwind-protect to restore the variable
|
|
|
5753 pointed to by ADDR to its existing value, and then changes its
|
|
|
5754 value to NEWVAL. Returns the previous value of specpdl_depth();
|
|
|
5755 pass this to unbind_to() after you are done. */
|
|
|
5756 int
|
|
|
5757 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval)
|
|
|
5758 {
|
|
|
5759 int count = specpdl_depth ();
|
|
|
5760 record_unwind_protect_restoring_lisp_object (addr, *addr);
|
|
|
5761 *addr = newval;
|
|
|
5762 return count;
|
|
|
5763 }
|
|
|
5764
|
|
|
5765 static Lisp_Object
|
|
|
5766 restore_int (Lisp_Object cons)
|
|
|
5767 {
|
|
|
5768 Lisp_Object opaque = XCAR (cons);
|
|
|
5769 Lisp_Object lval = XCDR (cons);
|
|
|
5770 int *addr = (int *) get_opaque_ptr (opaque);
|
|
|
5771 int val;
|
|
|
5772
|
|
|
5773 if (INTP (lval))
|
|
|
5774 val = XINT (lval);
|
|
|
5775 else
|
|
|
5776 {
|
|
|
5777 val = (int) get_opaque_ptr (lval);
|
|
|
5778 free_opaque_ptr (lval);
|
|
|
5779 }
|
|
|
5780
|
|
|
5781 *addr = val;
|
|
|
5782 free_opaque_ptr (opaque);
|
|
853
|
5783 free_cons (cons);
|
|
802
|
5784 return Qnil;
|
|
|
5785 }
|
|
|
5786
|
|
|
5787 /* Establish an unwind-protect which will restore the int pointed to
|
|
|
5788 by ADDR with the value VAL. This function works correctly with
|
|
|
5789 all ints, even those that don't fit into a Lisp integer. */
|
|
814
|
5790 static int
|
|
802
|
5791 record_unwind_protect_restoring_int (int *addr, int val)
|
|
|
5792 {
|
|
|
5793 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
5794 Lisp_Object lval;
|
|
|
5795
|
|
|
5796 if (NUMBER_FITS_IN_AN_EMACS_INT (val))
|
|
|
5797 lval = make_int (val);
|
|
|
5798 else
|
|
|
5799 lval = make_opaque_ptr ((void *) val);
|
|
|
5800 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval));
|
|
|
5801 }
|
|
|
5802
|
|
|
5803 /* Similar to specbind() but for any C variable whose value is an int.
|
|
|
5804 Sets up an unwind-protect to restore the variable pointed to by
|
|
|
5805 ADDR to its existing value, and then changes its value to NEWVAL.
|
|
|
5806 Returns the previous value of specpdl_depth(); pass this to
|
|
|
5807 unbind_to() after you are done. This function works correctly with
|
|
|
5808 all ints, even those that don't fit into a Lisp integer. */
|
|
|
5809 int
|
|
|
5810 internal_bind_int (int *addr, int newval)
|
|
|
5811 {
|
|
|
5812 int count = specpdl_depth ();
|
|
|
5813 record_unwind_protect_restoring_int (addr, *addr);
|
|
|
5814 *addr = newval;
|
|
|
5815 return count;
|
|
|
5816 }
|
|
|
5817
|
|
|
5818 static Lisp_Object
|
|
771
|
5819 free_pointer (Lisp_Object opaque)
|
|
|
5820 {
|
|
|
5821 xfree (get_opaque_ptr (opaque));
|
|
|
5822 free_opaque_ptr (opaque);
|
|
|
5823 return Qnil;
|
|
|
5824 }
|
|
|
5825
|
|
|
5826 /* Establish an unwind-protect which will free the specified block.
|
|
|
5827 */
|
|
|
5828 int
|
|
|
5829 record_unwind_protect_freeing (void *ptr)
|
|
|
5830 {
|
|
|
5831 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
5832 return record_unwind_protect (free_pointer, opaque);
|
|
|
5833 }
|
|
|
5834
|
|
|
5835 static Lisp_Object
|
|
|
5836 free_dynarr (Lisp_Object opaque)
|
|
|
5837 {
|
|
|
5838 Dynarr_free (get_opaque_ptr (opaque));
|
|
|
5839 free_opaque_ptr (opaque);
|
|
|
5840 return Qnil;
|
|
|
5841 }
|
|
|
5842
|
|
|
5843 int
|
|
|
5844 record_unwind_protect_freeing_dynarr (void *ptr)
|
|
|
5845 {
|
|
|
5846 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
5847 return record_unwind_protect (free_dynarr, opaque);
|
|
|
5848 }
|
|
428
|
5849
|
|
|
5850 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
5851 VALUE is not used, except that, purely as a convenience to the
|
|
771
|
5852 caller, it is protected from garbage-protection and returned. */
|
|
428
|
5853 Lisp_Object
|
|
771
|
5854 unbind_to_1 (int count, Lisp_Object value)
|
|
428
|
5855 {
|
|
|
5856 UNBIND_TO_GCPRO (count, value);
|
|
853
|
5857 check_specbind_stack_sanity ();
|
|
428
|
5858 return value;
|
|
|
5859 }
|
|
|
5860
|
|
|
5861 /* Don't call this directly.
|
|
|
5862 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
5863 void
|
|
|
5864 unbind_to_hairy (int count)
|
|
|
5865 {
|
|
771
|
5866 Lisp_Object oquit;
|
|
428
|
5867
|
|
442
|
5868 ++specpdl_ptr;
|
|
|
5869 ++specpdl_depth_counter;
|
|
|
5870
|
|
771
|
5871 /* Allow QUIT within unwind-protect routines, but defer any existing QUIT
|
|
|
5872 until afterwards. */
|
|
428
|
5873 check_quit (); /* make Vquit_flag accurate */
|
|
771
|
5874 oquit = Vquit_flag;
|
|
428
|
5875 Vquit_flag = Qnil;
|
|
|
5876
|
|
|
5877 while (specpdl_depth_counter != count)
|
|
|
5878 {
|
|
|
5879 --specpdl_ptr;
|
|
|
5880 --specpdl_depth_counter;
|
|
|
5881
|
|
|
5882 if (specpdl_ptr->func != 0)
|
|
|
5883 /* An unwind-protect */
|
|
|
5884 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
5885 else
|
|
|
5886 {
|
|
|
5887 /* We checked symbol for validity when we specbound it,
|
|
|
5888 so only need to call Fset if symbol has magic value. */
|
|
440
|
5889 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
428
|
5890 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
5891 sym->value = specpdl_ptr->old_value;
|
|
|
5892 else
|
|
|
5893 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
5894 }
|
|
|
5895
|
|
|
5896 #if 0 /* martin */
|
|
|
5897 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
5898 /* There should never be anything here for us to remove.
|
|
|
5899 If so, it indicates a logic error in Emacs. Catches
|
|
|
5900 should get removed when a throw or signal occurs, or
|
|
|
5901 when a catch or condition-case exits normally. But
|
|
|
5902 it's too dangerous to just remove this code. --ben */
|
|
|
5903
|
|
|
5904 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
5905 Braino on mly's part? */
|
|
|
5906 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
5907 that catch can't possibly still be valid. */
|
|
|
5908 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
5909 {
|
|
|
5910 catchlist = catchlist->next;
|
|
|
5911 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
5912 }
|
|
|
5913 #endif
|
|
|
5914 #endif
|
|
|
5915 }
|
|
771
|
5916 Vquit_flag = oquit;
|
|
853
|
5917 check_specbind_stack_sanity ();
|
|
428
|
5918 }
|
|
|
5919
|
|
|
5920
|
|
|
5921
|
|
|
5922 /* Get the value of symbol's global binding, even if that binding is
|
|
|
5923 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
5924
|
|
|
5925 Lisp_Object
|
|
|
5926 top_level_value (Lisp_Object symbol)
|
|
|
5927 {
|
|
|
5928 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5929
|
|
|
5930 CHECK_SYMBOL (symbol);
|
|
|
5931 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5932 {
|
|
|
5933 if (EQ (ptr->symbol, symbol))
|
|
|
5934 return ptr->old_value;
|
|
|
5935 }
|
|
|
5936 return XSYMBOL (symbol)->value;
|
|
|
5937 }
|
|
|
5938
|
|
|
5939 #if 0
|
|
|
5940
|
|
|
5941 Lisp_Object
|
|
|
5942 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
5943 {
|
|
|
5944 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5945
|
|
|
5946 CHECK_SYMBOL (symbol);
|
|
|
5947 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5948 {
|
|
|
5949 if (EQ (ptr->symbol, symbol))
|
|
|
5950 {
|
|
|
5951 ptr->old_value = newval;
|
|
|
5952 return newval;
|
|
|
5953 }
|
|
|
5954 }
|
|
|
5955 return Fset (symbol, newval);
|
|
|
5956 }
|
|
|
5957
|
|
|
5958 #endif /* 0 */
|
|
|
5959
|
|
|
5960
|
|
|
5961 /************************************************************************/
|
|
|
5962 /* Backtraces */
|
|
|
5963 /************************************************************************/
|
|
|
5964
|
|
|
5965 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
5966 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
5967 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
5968 */
|
|
|
5969 (level, flag))
|
|
|
5970 {
|
|
|
5971 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5972 REGISTER int i;
|
|
|
5973
|
|
|
5974 CHECK_INT (level);
|
|
|
5975
|
|
|
5976 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
5977 {
|
|
|
5978 backlist = backlist->next;
|
|
|
5979 }
|
|
|
5980
|
|
|
5981 if (backlist)
|
|
|
5982 backlist->debug_on_exit = !NILP (flag);
|
|
|
5983
|
|
|
5984 return flag;
|
|
|
5985 }
|
|
|
5986
|
|
|
5987 static void
|
|
|
5988 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
5989 {
|
|
|
5990 int printing_bindings = 0;
|
|
|
5991
|
|
|
5992 for (; speccount > speclimit; speccount--)
|
|
|
5993 {
|
|
|
5994 if (specpdl[speccount - 1].func == 0
|
|
|
5995 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
5996 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
5997 {
|
|
826
|
5998 write_c_string (stream, !printing_bindings ? " # bind (" : " ");
|
|
428
|
5999 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
6000 printing_bindings = 1;
|
|
|
6001 }
|
|
|
6002 else
|
|
|
6003 {
|
|
826
|
6004 if (printing_bindings) write_c_string (stream, ")\n");
|
|
|
6005 write_c_string (stream, " # (unwind-protect ...)\n");
|
|
428
|
6006 printing_bindings = 0;
|
|
|
6007 }
|
|
|
6008 }
|
|
826
|
6009 if (printing_bindings) write_c_string (stream, ")\n");
|
|
428
|
6010 }
|
|
|
6011
|
|
|
6012 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
6013 Print a trace of Lisp function calls currently active.
|
|
438
|
6014 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
444
|
6015 and defaults to the value of `standard-output'.
|
|
|
6016 Optional second arg DETAILED non-nil means show places where currently
|
|
|
6017 active variable bindings, catches, condition-cases, and
|
|
|
6018 unwind-protects, as well as function calls, were made.
|
|
428
|
6019 */
|
|
|
6020 (stream, detailed))
|
|
|
6021 {
|
|
|
6022 /* This function can GC */
|
|
|
6023 struct backtrace *backlist = backtrace_list;
|
|
|
6024 struct catchtag *catches = catchlist;
|
|
|
6025 int speccount = specpdl_depth();
|
|
|
6026
|
|
|
6027 int old_nl = print_escape_newlines;
|
|
|
6028 int old_pr = print_readably;
|
|
|
6029 Lisp_Object old_level = Vprint_level;
|
|
|
6030 Lisp_Object oiq = Vinhibit_quit;
|
|
|
6031 struct gcpro gcpro1, gcpro2;
|
|
|
6032
|
|
|
6033 /* We can't allow quits in here because that could cause the values
|
|
|
6034 of print_readably and print_escape_newlines to get screwed up.
|
|
|
6035 Normally we would use a record_unwind_protect but that would
|
|
|
6036 screw up the functioning of this function. */
|
|
|
6037 Vinhibit_quit = Qt;
|
|
|
6038
|
|
|
6039 entering_debugger = 0;
|
|
|
6040
|
|
872
|
6041 if (!NILP (detailed))
|
|
|
6042 Vprint_level = make_int (50);
|
|
|
6043 else
|
|
|
6044 Vprint_level = make_int (3);
|
|
428
|
6045 print_readably = 0;
|
|
|
6046 print_escape_newlines = 1;
|
|
|
6047
|
|
|
6048 GCPRO2 (stream, old_level);
|
|
|
6049
|
|
|
6050 if (NILP (stream))
|
|
|
6051 stream = Vstandard_output;
|
|
|
6052 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
6053 stream = Fselected_frame (Qnil);
|
|
|
6054
|
|
|
6055 for (;;)
|
|
|
6056 {
|
|
|
6057 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
6058 {
|
|
|
6059 int catchpdl = catches->pdlcount;
|
|
438
|
6060 if (speccount > catchpdl
|
|
|
6061 && specpdl[catchpdl].func == condition_case_unwind)
|
|
428
|
6062 /* This is a condition-case catchpoint */
|
|
|
6063 catchpdl = catchpdl + 1;
|
|
|
6064
|
|
|
6065 backtrace_specials (speccount, catchpdl, stream);
|
|
|
6066
|
|
|
6067 speccount = catches->pdlcount;
|
|
|
6068 if (catchpdl == speccount)
|
|
|
6069 {
|
|
826
|
6070 write_c_string (stream, " # (catch ");
|
|
428
|
6071 Fprin1 (catches->tag, stream);
|
|
826
|
6072 write_c_string (stream, " ...)\n");
|
|
428
|
6073 }
|
|
|
6074 else
|
|
|
6075 {
|
|
826
|
6076 write_c_string (stream, " # (condition-case ... . ");
|
|
428
|
6077 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
826
|
6078 write_c_string (stream, ")\n");
|
|
428
|
6079 }
|
|
|
6080 catches = catches->next;
|
|
|
6081 }
|
|
|
6082 else if (!backlist)
|
|
|
6083 break;
|
|
|
6084 else
|
|
|
6085 {
|
|
|
6086 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
6087 {
|
|
|
6088 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
6089 speccount = backlist->pdlcount;
|
|
|
6090 }
|
|
826
|
6091 write_c_string (stream, backlist->debug_on_exit ? "* " : " ");
|
|
428
|
6092 if (backlist->nargs == UNEVALLED)
|
|
|
6093 {
|
|
|
6094 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
826
|
6095 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */
|
|
428
|
6096 }
|
|
|
6097 else
|
|
|
6098 {
|
|
|
6099 Lisp_Object tem = *backlist->function;
|
|
|
6100 Fprin1 (tem, stream); /* This can QUIT */
|
|
826
|
6101 write_c_string (stream, "(");
|
|
428
|
6102 if (backlist->nargs == MANY)
|
|
|
6103 {
|
|
|
6104 int i;
|
|
|
6105 Lisp_Object tail = Qnil;
|
|
|
6106 struct gcpro ngcpro1;
|
|
|
6107
|
|
|
6108 NGCPRO1 (tail);
|
|
|
6109 for (tail = *backlist->args, i = 0;
|
|
|
6110 !NILP (tail);
|
|
|
6111 tail = Fcdr (tail), i++)
|
|
|
6112 {
|
|
826
|
6113 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6114 Fprin1 (Fcar (tail), stream);
|
|
|
6115 }
|
|
|
6116 NUNGCPRO;
|
|
|
6117 }
|
|
|
6118 else
|
|
|
6119 {
|
|
|
6120 int i;
|
|
|
6121 for (i = 0; i < backlist->nargs; i++)
|
|
|
6122 {
|
|
826
|
6123 if (!i && EQ (tem, Qbyte_code))
|
|
|
6124 {
|
|
|
6125 write_c_string (stream, "\"...\"");
|
|
|
6126 continue;
|
|
|
6127 }
|
|
|
6128 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6129 Fprin1 (backlist->args[i], stream);
|
|
|
6130 }
|
|
|
6131 }
|
|
826
|
6132 write_c_string (stream, ")\n");
|
|
428
|
6133 }
|
|
|
6134 backlist = backlist->next;
|
|
|
6135 }
|
|
|
6136 }
|
|
|
6137 Vprint_level = old_level;
|
|
|
6138 print_readably = old_pr;
|
|
|
6139 print_escape_newlines = old_nl;
|
|
|
6140 UNGCPRO;
|
|
|
6141 Vinhibit_quit = oiq;
|
|
|
6142 return Qnil;
|
|
|
6143 }
|
|
|
6144
|
|
|
6145
|
|
444
|
6146 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /*
|
|
|
6147 Return the function and arguments NFRAMES up from current execution point.
|
|
428
|
6148 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
6149 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
6150 If that frame has evaluated its arguments and called its function already,
|
|
|
6151 the value is (t FUNCTION ARG-VALUES...).
|
|
|
6152 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
6153 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
6154 or a lambda expression for macro calls.
|
|
444
|
6155 If NFRAMES is more than the number of frames, the value is nil.
|
|
428
|
6156 */
|
|
|
6157 (nframes))
|
|
|
6158 {
|
|
|
6159 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
6160 REGISTER int i;
|
|
|
6161 Lisp_Object tem;
|
|
|
6162
|
|
|
6163 CHECK_NATNUM (nframes);
|
|
|
6164
|
|
|
6165 /* Find the frame requested. */
|
|
|
6166 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
6167 backlist = backlist->next;
|
|
|
6168
|
|
|
6169 if (!backlist)
|
|
|
6170 return Qnil;
|
|
|
6171 if (backlist->nargs == UNEVALLED)
|
|
|
6172 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
6173 else
|
|
|
6174 {
|
|
|
6175 if (backlist->nargs == MANY)
|
|
|
6176 tem = *backlist->args;
|
|
|
6177 else
|
|
|
6178 tem = Flist (backlist->nargs, backlist->args);
|
|
|
6179
|
|
|
6180 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
6181 }
|
|
|
6182 }
|
|
|
6183
|
|
|
6184
|
|
|
6185 /************************************************************************/
|
|
|
6186 /* Warnings */
|
|
|
6187 /************************************************************************/
|
|
|
6188
|
|
|
6189 void
|
|
|
6190 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
6191 Lisp_Object obj)
|
|
|
6192 {
|
|
793
|
6193 /* Don't even generate debug warnings if they're going to be discarded,
|
|
|
6194 to avoid excessive consing. */
|
|
|
6195 if (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) &&
|
|
|
6196 !EQ (Vlog_warning_minimum_level, Qdebug))
|
|
|
6197 return;
|
|
|
6198
|
|
428
|
6199 obj = list1 (list3 (class, level, obj));
|
|
|
6200 if (NILP (Vpending_warnings))
|
|
|
6201 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
6202 else
|
|
|
6203 {
|
|
|
6204 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
6205 Vpending_warnings_tail = obj;
|
|
|
6206 }
|
|
|
6207 }
|
|
|
6208
|
|
|
6209 /* #### This should probably accept Lisp objects; but then we have
|
|
|
6210 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
6211
|
|
|
6212 An alternative approach is to just pass some non-string type of
|
|
|
6213 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
6214 automatically be called when it is safe to do so. */
|
|
|
6215
|
|
|
6216 void
|
|
867
|
6217 warn_when_safe (Lisp_Object class, Lisp_Object level, const CIbyte *fmt, ...)
|
|
428
|
6218 {
|
|
|
6219 Lisp_Object obj;
|
|
|
6220 va_list args;
|
|
|
6221
|
|
793
|
6222 /* Don't even generate debug warnings if they're going to be discarded,
|
|
|
6223 to avoid excessive consing. */
|
|
|
6224 if (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) &&
|
|
|
6225 !EQ (Vlog_warning_minimum_level, Qdebug))
|
|
|
6226 return;
|
|
|
6227
|
|
428
|
6228 va_start (args, fmt);
|
|
771
|
6229 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
6230 va_end (args);
|
|
|
6231
|
|
|
6232 warn_when_safe_lispobj (class, level, obj);
|
|
|
6233 }
|
|
|
6234
|
|
|
6235
|
|
|
6236
|
|
|
6237
|
|
|
6238 /************************************************************************/
|
|
|
6239 /* Initialization */
|
|
|
6240 /************************************************************************/
|
|
|
6241
|
|
|
6242 void
|
|
|
6243 syms_of_eval (void)
|
|
|
6244 {
|
|
442
|
6245 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
6246
|
|
563
|
6247 DEFSYMBOL (Qinhibit_quit);
|
|
|
6248 DEFSYMBOL (Qautoload);
|
|
|
6249 DEFSYMBOL (Qdebug_on_error);
|
|
|
6250 DEFSYMBOL (Qstack_trace_on_error);
|
|
|
6251 DEFSYMBOL (Qdebug_on_signal);
|
|
|
6252 DEFSYMBOL (Qstack_trace_on_signal);
|
|
|
6253 DEFSYMBOL (Qdebugger);
|
|
|
6254 DEFSYMBOL (Qmacro);
|
|
428
|
6255 defsymbol (&Qand_rest, "&rest");
|
|
|
6256 defsymbol (&Qand_optional, "&optional");
|
|
|
6257 /* Note that the process code also uses Qexit */
|
|
563
|
6258 DEFSYMBOL (Qexit);
|
|
|
6259 DEFSYMBOL (Qsetq);
|
|
|
6260 DEFSYMBOL (Qinteractive);
|
|
|
6261 DEFSYMBOL (Qcommandp);
|
|
|
6262 DEFSYMBOL (Qdefun);
|
|
|
6263 DEFSYMBOL (Qprogn);
|
|
|
6264 DEFSYMBOL (Qvalues);
|
|
|
6265 DEFSYMBOL (Qdisplay_warning);
|
|
|
6266 DEFSYMBOL (Qrun_hooks);
|
|
887
|
6267 DEFSYMBOL (Qfinalize_list);
|
|
563
|
6268 DEFSYMBOL (Qif);
|
|
428
|
6269
|
|
|
6270 DEFSUBR (For);
|
|
|
6271 DEFSUBR (Fand);
|
|
|
6272 DEFSUBR (Fif);
|
|
|
6273 DEFSUBR_MACRO (Fwhen);
|
|
|
6274 DEFSUBR_MACRO (Funless);
|
|
|
6275 DEFSUBR (Fcond);
|
|
|
6276 DEFSUBR (Fprogn);
|
|
|
6277 DEFSUBR (Fprog1);
|
|
|
6278 DEFSUBR (Fprog2);
|
|
|
6279 DEFSUBR (Fsetq);
|
|
|
6280 DEFSUBR (Fquote);
|
|
|
6281 DEFSUBR (Ffunction);
|
|
|
6282 DEFSUBR (Fdefun);
|
|
|
6283 DEFSUBR (Fdefmacro);
|
|
|
6284 DEFSUBR (Fdefvar);
|
|
|
6285 DEFSUBR (Fdefconst);
|
|
|
6286 DEFSUBR (Fuser_variable_p);
|
|
|
6287 DEFSUBR (Flet);
|
|
|
6288 DEFSUBR (FletX);
|
|
|
6289 DEFSUBR (Fwhile);
|
|
|
6290 DEFSUBR (Fmacroexpand_internal);
|
|
|
6291 DEFSUBR (Fcatch);
|
|
|
6292 DEFSUBR (Fthrow);
|
|
|
6293 DEFSUBR (Funwind_protect);
|
|
|
6294 DEFSUBR (Fcondition_case);
|
|
|
6295 DEFSUBR (Fcall_with_condition_handler);
|
|
|
6296 DEFSUBR (Fsignal);
|
|
|
6297 DEFSUBR (Finteractive_p);
|
|
|
6298 DEFSUBR (Fcommandp);
|
|
|
6299 DEFSUBR (Fcommand_execute);
|
|
|
6300 DEFSUBR (Fautoload);
|
|
|
6301 DEFSUBR (Feval);
|
|
|
6302 DEFSUBR (Fapply);
|
|
|
6303 DEFSUBR (Ffuncall);
|
|
|
6304 DEFSUBR (Ffunctionp);
|
|
|
6305 DEFSUBR (Ffunction_min_args);
|
|
|
6306 DEFSUBR (Ffunction_max_args);
|
|
|
6307 DEFSUBR (Frun_hooks);
|
|
|
6308 DEFSUBR (Frun_hook_with_args);
|
|
|
6309 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
6310 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
6311 DEFSUBR (Fbacktrace_debug);
|
|
|
6312 DEFSUBR (Fbacktrace);
|
|
|
6313 DEFSUBR (Fbacktrace_frame);
|
|
|
6314 }
|
|
|
6315
|
|
|
6316 void
|
|
814
|
6317 init_eval_semi_early (void)
|
|
428
|
6318 {
|
|
|
6319 specpdl_ptr = specpdl;
|
|
|
6320 specpdl_depth_counter = 0;
|
|
|
6321 catchlist = 0;
|
|
|
6322 Vcondition_handlers = Qnil;
|
|
|
6323 backtrace_list = 0;
|
|
|
6324 Vquit_flag = Qnil;
|
|
|
6325 debug_on_next_call = 0;
|
|
|
6326 lisp_eval_depth = 0;
|
|
|
6327 entering_debugger = 0;
|
|
|
6328 }
|
|
|
6329
|
|
|
6330 void
|
|
|
6331 reinit_vars_of_eval (void)
|
|
|
6332 {
|
|
|
6333 preparing_for_armageddon = 0;
|
|
|
6334 in_warnings = 0;
|
|
|
6335 specpdl_size = 50;
|
|
|
6336 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
6337 /* XEmacs change: increase these values. */
|
|
|
6338 max_specpdl_size = 3000;
|
|
442
|
6339 max_lisp_eval_depth = 1000;
|
|
|
6340 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
6341 throw_level = 0;
|
|
|
6342 #endif
|
|
|
6343 }
|
|
|
6344
|
|
|
6345 void
|
|
|
6346 vars_of_eval (void)
|
|
|
6347 {
|
|
|
6348 reinit_vars_of_eval ();
|
|
|
6349
|
|
|
6350 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
6351 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
6352 */ );
|
|
|
6353
|
|
|
6354 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
6355 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
6356 This limit is to catch infinite recursions for you before they cause
|
|
|
6357 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
6358 You can safely make it considerably larger than its default value,
|
|
|
6359 if that proves inconveniently small.
|
|
|
6360 */ );
|
|
|
6361
|
|
|
6362 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
853
|
6363 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil.
|
|
|
6364 `critical' causes running Lisp code to abort regardless of `inhibit-quit'.
|
|
|
6365 Normally, you do not need to set this value yourself. It is set to
|
|
|
6366 t each time a Control-G is detected, and to `critical' each time a
|
|
|
6367 Shift-Control-G is detected. The XEmacs core C code is littered with
|
|
|
6368 calls to the QUIT; macro, which check the values of `quit-flag' and
|
|
|
6369 `inhibit-quit' and abort (or more accurately, call (signal 'quit)) if
|
|
|
6370 it's correct to do so.
|
|
428
|
6371 */ );
|
|
|
6372 Vquit_flag = Qnil;
|
|
|
6373
|
|
|
6374 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
6375 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
6376 Note that `quit-flag' will still be set by typing C-g,
|
|
|
6377 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
6378 To prevent this happening, set `quit-flag' to nil
|
|
853
|
6379 before making `inhibit-quit' nil.
|
|
|
6380
|
|
|
6381 The value of `inhibit-quit' is ignored if a critical quit is
|
|
|
6382 requested by typing control-shift-G in a window-system frame;
|
|
|
6383 this is explained in more detail in `quit-flag'.
|
|
428
|
6384 */ );
|
|
|
6385 Vinhibit_quit = Qnil;
|
|
|
6386
|
|
|
6387 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
6388 *Non-nil means automatically display a backtrace buffer
|
|
|
6389 after any error that is not handled by a `condition-case'.
|
|
|
6390 If the value is a list, an error only means to display a backtrace
|
|
|
6391 if one of its condition symbols appears in the list.
|
|
|
6392 See also variable `stack-trace-on-signal'.
|
|
|
6393 */ );
|
|
|
6394 Vstack_trace_on_error = Qnil;
|
|
|
6395
|
|
|
6396 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
6397 *Non-nil means automatically display a backtrace buffer
|
|
|
6398 after any error that is signalled, whether or not it is handled by
|
|
|
6399 a `condition-case'.
|
|
|
6400 If the value is a list, an error only means to display a backtrace
|
|
|
6401 if one of its condition symbols appears in the list.
|
|
|
6402 See also variable `stack-trace-on-error'.
|
|
|
6403 */ );
|
|
|
6404 Vstack_trace_on_signal = Qnil;
|
|
|
6405
|
|
|
6406 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
6407 *List of errors for which the debugger should not be called.
|
|
|
6408 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
6409 If any element applies to a given error, that error skips the debugger
|
|
|
6410 and just returns to top level.
|
|
|
6411 This overrides the variable `debug-on-error'.
|
|
|
6412 It does not apply to errors handled by `condition-case'.
|
|
|
6413 */ );
|
|
|
6414 Vdebug_ignored_errors = Qnil;
|
|
|
6415
|
|
|
6416 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
6417 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
6418 The debugger will not be entered if the error is handled by
|
|
|
6419 a `condition-case'.
|
|
|
6420 If the value is a list, an error only means to enter the debugger
|
|
|
6421 if one of its condition symbols appears in the list.
|
|
|
6422 This variable is overridden by `debug-ignored-errors'.
|
|
|
6423 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
771
|
6424 If this variable is set while XEmacs is running noninteractively,
|
|
|
6425 an unhandled error will cause a backtrace to be output and the C
|
|
|
6426 debugger entered using `force-debugging-signal'. This can be very
|
|
|
6427 useful when debugging noninteractive errors in tricky situations,
|
|
|
6428 e.g. makefiles, since you can set this variable using an environment
|
|
|
6429 variable, like this:
|
|
|
6430
|
|
|
6431 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)'
|
|
|
6432 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)'
|
|
428
|
6433 */ );
|
|
|
6434 Vdebug_on_error = Qnil;
|
|
|
6435
|
|
|
6436 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
6437 *Non-nil means enter debugger if an error is signalled.
|
|
|
6438 The debugger will be entered whether or not the error is handled by
|
|
|
6439 a `condition-case'.
|
|
|
6440 If the value is a list, an error only means to enter the debugger
|
|
|
6441 if one of its condition symbols appears in the list.
|
|
|
6442 See also variable `debug-on-quit'.
|
|
|
6443 */ );
|
|
|
6444 Vdebug_on_signal = Qnil;
|
|
|
6445
|
|
|
6446 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
6447 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
6448 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
6449 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
6450 control-shift-G to signal a critical quit.
|
|
|
6451 */ );
|
|
|
6452 debug_on_quit = 0;
|
|
|
6453
|
|
|
6454 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
6455 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
6456 */ );
|
|
|
6457
|
|
|
6458 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
6459 Function to call to invoke debugger.
|
|
|
6460 If due to frame exit, args are `exit' and the value being returned;
|
|
|
6461 this function's value will be returned instead of that.
|
|
|
6462 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
6463 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
6464 If due to `eval' entry, one arg, t.
|
|
|
6465 */ );
|
|
|
6466 Vdebugger = Qnil;
|
|
|
6467
|
|
853
|
6468 staticpro (&Vcatch_everything_tag);
|
|
|
6469 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0);
|
|
|
6470
|
|
428
|
6471 staticpro (&Vpending_warnings);
|
|
|
6472 Vpending_warnings = Qnil;
|
|
452
|
6473 dump_add_root_object (&Vpending_warnings_tail);
|
|
428
|
6474 Vpending_warnings_tail = Qnil;
|
|
|
6475
|
|
793
|
6476 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level);
|
|
|
6477 Vlog_warning_minimum_level = Qinfo;
|
|
|
6478
|
|
428
|
6479 staticpro (&Vautoload_queue);
|
|
|
6480 Vautoload_queue = Qnil;
|
|
|
6481
|
|
|
6482 staticpro (&Vcondition_handlers);
|
|
|
6483
|
|
853
|
6484 staticpro (&Vdeletable_permanent_display_objects);
|
|
|
6485 Vdeletable_permanent_display_objects = Qnil;
|
|
|
6486
|
|
|
6487 staticpro (&Vmodifiable_buffers);
|
|
|
6488 Vmodifiable_buffers = Qnil;
|
|
|
6489
|
|
|
6490 inhibit_flags = 0;
|
|
|
6491 }
|
