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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. */
|
|
|
1406 do_autoload (def, sym);
|
|
|
1407 continue;
|
|
|
1408 }
|
|
|
1409 else
|
|
|
1410 break;
|
|
|
1411 }
|
|
|
1412 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1413 break;
|
|
|
1414 else expander = XCDR (def);
|
|
|
1415 }
|
|
|
1416 else
|
|
|
1417 {
|
|
|
1418 expander = XCDR (tem);
|
|
|
1419 if (NILP (expander))
|
|
|
1420 break;
|
|
|
1421 }
|
|
|
1422 form = apply1 (expander, XCDR (form));
|
|
|
1423 }
|
|
|
1424 return form;
|
|
|
1425 }
|
|
|
1426
|
|
|
1427
|
|
|
1428 /************************************************************************/
|
|
|
1429 /* Non-local exits */
|
|
|
1430 /************************************************************************/
|
|
|
1431
|
|
|
1432 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1433 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1434 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1435 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1436 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1437 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1438 */
|
|
|
1439 (args))
|
|
|
1440 {
|
|
|
1441 /* This function can GC */
|
|
|
1442 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1443 Lisp_Object body = XCDR (args);
|
|
853
|
1444 return internal_catch (tag, Fprogn, body, 0, 0);
|
|
428
|
1445 }
|
|
|
1446
|
|
|
1447 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1448 FUNC should return a Lisp_Object.
|
|
|
1449 This is how catches are done from within C code. */
|
|
|
1450
|
|
|
1451 Lisp_Object
|
|
|
1452 internal_catch (Lisp_Object tag,
|
|
|
1453 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1454 Lisp_Object arg,
|
|
853
|
1455 int * volatile threw,
|
|
|
1456 Lisp_Object * volatile thrown_tag)
|
|
428
|
1457 {
|
|
|
1458 /* This structure is made part of the chain `catchlist'. */
|
|
|
1459 struct catchtag c;
|
|
|
1460
|
|
|
1461 /* Fill in the components of c, and put it on the list. */
|
|
|
1462 c.next = catchlist;
|
|
|
1463 c.tag = tag;
|
|
853
|
1464 c.actual_tag = Qnil;
|
|
428
|
1465 c.val = Qnil;
|
|
|
1466 c.backlist = backtrace_list;
|
|
|
1467 #if 0 /* FSFmacs */
|
|
|
1468 /* #### */
|
|
|
1469 c.handlerlist = handlerlist;
|
|
|
1470 #endif
|
|
|
1471 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1472 c.pdlcount = specpdl_depth();
|
|
|
1473 #if 0 /* FSFmacs */
|
|
|
1474 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1475 #endif
|
|
|
1476 c.gcpro = gcprolist;
|
|
|
1477 catchlist = &c;
|
|
|
1478
|
|
|
1479 /* Call FUNC. */
|
|
|
1480 if (SETJMP (c.jmp))
|
|
|
1481 {
|
|
|
1482 /* Throw works by a longjmp that comes right here. */
|
|
|
1483 if (threw) *threw = 1;
|
|
853
|
1484 if (thrown_tag) *thrown_tag = c.actual_tag;
|
|
428
|
1485 return c.val;
|
|
|
1486 }
|
|
|
1487 c.val = (*func) (arg);
|
|
|
1488 if (threw) *threw = 0;
|
|
853
|
1489 if (thrown_tag) *thrown_tag = Qnil;
|
|
428
|
1490 catchlist = c.next;
|
|
853
|
1491 check_catchlist_sanity ();
|
|
428
|
1492 return c.val;
|
|
|
1493 }
|
|
|
1494
|
|
|
1495
|
|
|
1496 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1497 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1498
|
|
|
1499 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1500 they choose the catch tag to throw to. A catch tag for a
|
|
|
1501 condition-case form has a TAG of Qnil.
|
|
|
1502
|
|
|
1503 Before each catch is discarded, unbind all special bindings and
|
|
|
1504 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1505 the handler stack as we go, so that the proper handlers are in
|
|
|
1506 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1507 some static info saved in CATCH, and longjmp to the location
|
|
|
1508 specified in the
|
|
|
1509
|
|
|
1510 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1511
|
|
|
1512 static void
|
|
853
|
1513 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag)
|
|
428
|
1514 {
|
|
|
1515 REGISTER int last_time;
|
|
|
1516
|
|
|
1517 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1518 Before each catch is discarded, unbind all special bindings
|
|
|
1519 and execute all unwind-protect clauses made above that catch.
|
|
|
1520 At the end, restore some static info saved in CATCH,
|
|
|
1521 and longjmp to the location specified.
|
|
|
1522 */
|
|
|
1523
|
|
|
1524 /* Save the value somewhere it will be GC'ed.
|
|
|
1525 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1526 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1527 c->val = val;
|
|
853
|
1528 c->actual_tag = tag;
|
|
428
|
1529
|
|
|
1530 #if 0 /* FSFmacs */
|
|
|
1531 /* Restore the polling-suppression count. */
|
|
|
1532 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1533 #endif
|
|
|
1534
|
|
617
|
1535 #if 1
|
|
428
|
1536 do
|
|
|
1537 {
|
|
|
1538 last_time = catchlist == c;
|
|
|
1539
|
|
|
1540 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1541 handlers. */
|
|
771
|
1542 unbind_to (catchlist->pdlcount);
|
|
428
|
1543 catchlist = catchlist->next;
|
|
853
|
1544 check_catchlist_sanity ();
|
|
428
|
1545 }
|
|
|
1546 while (! last_time);
|
|
617
|
1547 #else
|
|
|
1548 /* Former XEmacs code. This is definitely not as correct because
|
|
|
1549 there may be a number of catches we're unwinding, and a number
|
|
|
1550 of unwind-protects in the process. By not undoing the catches till
|
|
|
1551 the end, there may be invalid catches still current. (This would
|
|
|
1552 be a particular problem with code like this:
|
|
|
1553
|
|
|
1554 (catch 'foo
|
|
|
1555 (call-some-code-which-does...
|
|
|
1556 (catch 'bar
|
|
|
1557 (unwind-protect
|
|
|
1558 (call-some-code-which-does...
|
|
|
1559 (catch 'bar
|
|
|
1560 (call-some-code-which-does...
|
|
|
1561 (throw 'foo nil))))
|
|
|
1562 (throw 'bar nil)))))
|
|
|
1563
|
|
|
1564 This would try to throw to the inner (catch 'bar)!
|
|
|
1565
|
|
|
1566 --ben
|
|
|
1567 */
|
|
428
|
1568 /* Unwind the specpdl stack */
|
|
771
|
1569 unbind_to (c->pdlcount);
|
|
428
|
1570 catchlist = c->next;
|
|
853
|
1571 check_catchlist_sanity ();
|
|
617
|
1572 #endif /* Former code */
|
|
428
|
1573
|
|
|
1574 gcprolist = c->gcpro;
|
|
|
1575 backtrace_list = c->backlist;
|
|
|
1576 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1577
|
|
442
|
1578 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1579 throw_level = 0;
|
|
|
1580 #endif
|
|
|
1581 LONGJMP (c->jmp, 1);
|
|
|
1582 }
|
|
|
1583
|
|
|
1584 static DOESNT_RETURN
|
|
|
1585 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1586 Lisp_Object sig, Lisp_Object data)
|
|
|
1587 {
|
|
442
|
1588 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1589 /* die if we recurse more than is reasonable */
|
|
|
1590 if (++throw_level > 20)
|
|
793
|
1591 abort ();
|
|
428
|
1592 #endif
|
|
|
1593
|
|
|
1594 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1595 "last resort" when there is no handler for this error and
|
|
|
1596 the debugger couldn't be invoked, so we are throwing to
|
|
|
1597 'top-level. If this tag doesn't exist (happens during the
|
|
|
1598 initialization stages) we would get in an infinite recursive
|
|
|
1599 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1600 really-early-error-handler.
|
|
|
1601
|
|
|
1602 Note that in fact the only time that the "last resort"
|
|
|
1603 occurs is when there's no catch for 'top-level -- the
|
|
|
1604 'top-level catch and the catch-all error handler are
|
|
|
1605 established at the same time, in initial_command_loop/
|
|
|
1606 top_level_1.
|
|
|
1607
|
|
853
|
1608 [[#### Fix this horrifitude!]]
|
|
|
1609
|
|
|
1610 I don't think this is horrifitude, just defensive programming. --ben
|
|
428
|
1611 */
|
|
|
1612
|
|
|
1613 while (1)
|
|
|
1614 {
|
|
|
1615 REGISTER struct catchtag *c;
|
|
|
1616
|
|
|
1617 #if 0 /* FSFmacs */
|
|
|
1618 if (!NILP (tag)) /* #### */
|
|
|
1619 #endif
|
|
|
1620 for (c = catchlist; c; c = c->next)
|
|
|
1621 {
|
|
853
|
1622 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag))
|
|
|
1623 unwind_to_catch (c, val, tag);
|
|
428
|
1624 }
|
|
|
1625 if (!bomb_out_p)
|
|
|
1626 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1627 else
|
|
|
1628 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1629 }
|
|
|
1630
|
|
|
1631 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1632 /* throw_level--; */
|
|
|
1633 /* getting tired of compilation warnings */
|
|
|
1634 /* return Qnil; */
|
|
|
1635 }
|
|
|
1636
|
|
|
1637 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1638 Fthrow() works.
|
|
|
1639
|
|
|
1640 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1641 back to the appropriate condition-case handler after (maybe)
|
|
|
1642 the debugger is entered. In that case, TAG is the value
|
|
|
1643 of Vcondition_handlers that was in place just after the
|
|
|
1644 condition-case handler was set up. The car of this will be
|
|
|
1645 some data referring to the handler: Its car will be Qunbound
|
|
|
1646 (thus, this tag can never be generated by Lisp code), and
|
|
|
1647 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1648 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1649 This works fine because Fthrow() does not care what TAG was
|
|
|
1650 passed to it: it just looks up the catch list for something
|
|
|
1651 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1652 back to the place that established the catch (in this case,
|
|
|
1653 condition_case_1). See below for more info.
|
|
|
1654 */
|
|
|
1655
|
|
|
1656 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
444
|
1657 Throw to the catch for TAG and return VALUE from it.
|
|
428
|
1658 Both TAG and VALUE are evalled.
|
|
|
1659 */
|
|
444
|
1660 (tag, value))
|
|
|
1661 {
|
|
|
1662 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */
|
|
428
|
1663 return Qnil;
|
|
|
1664 }
|
|
|
1665
|
|
|
1666 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1667 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1668 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1669 If BODYFORM completes normally, its value is returned
|
|
|
1670 after executing the UNWINDFORMS.
|
|
|
1671 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1672 */
|
|
|
1673 (args))
|
|
|
1674 {
|
|
|
1675 /* This function can GC */
|
|
|
1676 int speccount = specpdl_depth();
|
|
|
1677
|
|
|
1678 record_unwind_protect (Fprogn, XCDR (args));
|
|
771
|
1679 return unbind_to_1 (speccount, Feval (XCAR (args)));
|
|
428
|
1680 }
|
|
|
1681
|
|
|
1682
|
|
|
1683 /************************************************************************/
|
|
|
1684 /* Signalling and trapping errors */
|
|
|
1685 /************************************************************************/
|
|
|
1686
|
|
|
1687 static Lisp_Object
|
|
|
1688 condition_bind_unwind (Lisp_Object loser)
|
|
|
1689 {
|
|
617
|
1690 /* There is no problem freeing stuff here like there is in
|
|
|
1691 condition_case_unwind(), because there are no outside pointers
|
|
|
1692 (like the tag below in the catchlist) pointing to the objects. */
|
|
853
|
1693
|
|
428
|
1694 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1695 Lisp_Object tem = XCAR (loser);
|
|
853
|
1696 int first = 1;
|
|
428
|
1697
|
|
|
1698 while (CONSP (tem))
|
|
|
1699 {
|
|
853
|
1700 Lisp_Object victim = tem;
|
|
|
1701 if (first && OPAQUE_PTRP (XCAR (victim)))
|
|
|
1702 free_opaque_ptr (XCAR (victim));
|
|
|
1703 first = 0;
|
|
|
1704 tem = XCDR (victim);
|
|
428
|
1705 free_cons (victim);
|
|
|
1706 }
|
|
|
1707
|
|
|
1708 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
853
|
1709 Vcondition_handlers = XCDR (loser);
|
|
|
1710
|
|
|
1711 free_cons (loser);
|
|
428
|
1712 return Qnil;
|
|
|
1713 }
|
|
|
1714
|
|
|
1715 static Lisp_Object
|
|
|
1716 condition_case_unwind (Lisp_Object loser)
|
|
|
1717 {
|
|
|
1718 /* ((<unbound> . clauses) ... other handlers */
|
|
617
|
1719 /* NO! Doing this now leaves the tag deleted in a still-active
|
|
|
1720 catch. With the recent changes to unwind_to_catch(), the
|
|
|
1721 evil situation might not happen any more; it certainly could
|
|
|
1722 happen before because it did. But it's very precarious to rely
|
|
|
1723 on something like this. #### Instead we should rewrite, adopting
|
|
|
1724 the FSF's mechanism with a struct handler instead of
|
|
|
1725 Vcondition_handlers; then we have NO Lisp-object structures used
|
|
|
1726 to hold all of the values, and there's no possibility either of
|
|
|
1727 crashes from freeing objects too quickly, or objects not getting
|
|
|
1728 freed and hanging around till the next GC.
|
|
|
1729
|
|
|
1730 In practice, the extra consing here should not matter because
|
|
|
1731 it only happens when we throw past the condition-case, which almost
|
|
|
1732 always is the result of an error. Most of the time, there will be
|
|
|
1733 no error, and we will free the objects below in the main function.
|
|
|
1734
|
|
|
1735 --ben
|
|
|
1736
|
|
|
1737 DO NOT DO: free_cons (XCAR (loser));
|
|
|
1738 */
|
|
|
1739
|
|
428
|
1740 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
617
|
1741 Vcondition_handlers = XCDR (loser);
|
|
|
1742
|
|
|
1743 /* DO NOT DO: free_cons (loser); */
|
|
428
|
1744 return Qnil;
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1748 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1749
|
|
|
1750 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1751 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1752 HANDLERS as something to be caught, the return value of this
|
|
|
1753 function is the return value from BFUN. If such an error does
|
|
|
1754 occur, HFUN is called, and its return value becomes the
|
|
|
1755 return value of condition_case_1(). The second argument passed
|
|
|
1756 to HFUN will always be HARG. The first argument depends on
|
|
|
1757 HANDLERS:
|
|
|
1758
|
|
|
1759 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1760 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1761 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1762 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1763 `debug-on-error' was set.
|
|
|
1764
|
|
|
1765 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1766 debugger is invoked if `debug-on-error' was set.
|
|
|
1767
|
|
|
1768 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1769 exactly as in `condition-case', and errors will be trapped
|
|
|
1770 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1771 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1772 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1773
|
|
|
1774 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1775 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1776 for why), establishes a catch whose tag is this new value of
|
|
|
1777 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1778 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1779 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1780 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1781 jump point we just established, and we in turn just call the
|
|
|
1782 HFUN and return its value.
|
|
|
1783
|
|
|
1784 For a real condition-case, HFUN will always be
|
|
|
1785 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1786 to condition-case. That function just binds VAR to the cons
|
|
|
1787 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1788 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1789 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1790 it had *before* condition_case_1() was called. This maintains
|
|
|
1791 consistency (so that the state of things at exit of
|
|
|
1792 condition_case_1() is the same as at entry), and implies
|
|
|
1793 that the handler can signal the same error again (possibly
|
|
|
1794 after processing of its own), without getting in an infinite
|
|
|
1795 loop. */
|
|
|
1796
|
|
|
1797 Lisp_Object
|
|
|
1798 condition_case_1 (Lisp_Object handlers,
|
|
|
1799 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1800 Lisp_Object barg,
|
|
|
1801 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1802 Lisp_Object harg)
|
|
|
1803 {
|
|
|
1804 int speccount = specpdl_depth();
|
|
|
1805 struct catchtag c;
|
|
617
|
1806 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
428
|
1807
|
|
|
1808 #if 0 /* FSFmacs */
|
|
|
1809 c.tag = Qnil;
|
|
|
1810 #else
|
|
|
1811 /* Do consing now so out-of-memory error happens up front */
|
|
|
1812 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1813 which is known specially by Fsignal.
|
|
617
|
1814 [[ This is an abomination, but to fix it would require either
|
|
428
|
1815 making condition_case cons (a union of the conditions of the clauses)
|
|
617
|
1816 or changing the byte-compiler output (no thanks).]]
|
|
|
1817
|
|
|
1818 The above comment is clearly wrong. FSF does not do it this way
|
|
|
1819 and did not change the byte-compiler output. Instead they use a
|
|
|
1820 `struct handler' to hold the various values (in place of our
|
|
|
1821 Vcondition_handlers) and chain them together, with pointers from
|
|
|
1822 the `struct catchtag' to the `struct handler'. We should perhaps
|
|
|
1823 consider moving to something similar, but not before I merge my
|
|
|
1824 stderr-proc workspace, which contains changes to these
|
|
|
1825 functions. --ben */
|
|
428
|
1826 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1827 Vcondition_handlers);
|
|
|
1828 #endif
|
|
|
1829 c.val = Qnil;
|
|
853
|
1830 c.actual_tag = Qnil;
|
|
428
|
1831 c.backlist = backtrace_list;
|
|
|
1832 #if 0 /* FSFmacs */
|
|
|
1833 /* #### */
|
|
|
1834 c.handlerlist = handlerlist;
|
|
|
1835 #endif
|
|
|
1836 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1837 c.pdlcount = specpdl_depth();
|
|
|
1838 #if 0 /* FSFmacs */
|
|
|
1839 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1840 #endif
|
|
|
1841 c.gcpro = gcprolist;
|
|
|
1842 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1843 c.next = catchlist;
|
|
|
1844
|
|
|
1845 if (SETJMP (c.jmp))
|
|
|
1846 {
|
|
|
1847 /* throw does ungcpro, etc */
|
|
|
1848 return (*hfun) (c.val, harg);
|
|
|
1849 }
|
|
|
1850
|
|
|
1851 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1852
|
|
|
1853 catchlist = &c;
|
|
|
1854 #if 0 /* FSFmacs */
|
|
|
1855 h.handler = handlers;
|
|
|
1856 h.var = Qnil;
|
|
|
1857 h.next = handlerlist;
|
|
|
1858 h.tag = &c;
|
|
|
1859 handlerlist = &h;
|
|
|
1860 #else
|
|
|
1861 Vcondition_handlers = c.tag;
|
|
|
1862 #endif
|
|
|
1863 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1864 c.val = ((*bfun) (barg));
|
|
|
1865 UNGCPRO;
|
|
617
|
1866
|
|
|
1867 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */
|
|
|
1868 GCPRO3 (harg, c.val, c.tag);
|
|
|
1869
|
|
428
|
1870 catchlist = c.next;
|
|
853
|
1871 check_catchlist_sanity ();
|
|
617
|
1872 /* Note: The unbind also resets Vcondition_handlers. Maybe we should
|
|
|
1873 delete this here. */
|
|
428
|
1874 Vcondition_handlers = XCDR (c.tag);
|
|
771
|
1875 unbind_to (speccount);
|
|
617
|
1876
|
|
|
1877 UNGCPRO;
|
|
|
1878 /* free the conses *after* the unbind, because the unbind will run
|
|
|
1879 condition_case_unwind above. */
|
|
853
|
1880 free_cons (XCAR (c.tag));
|
|
|
1881 free_cons (c.tag);
|
|
617
|
1882 return c.val;
|
|
428
|
1883 }
|
|
|
1884
|
|
|
1885 static Lisp_Object
|
|
|
1886 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1887 {
|
|
|
1888 /* This function can GC */
|
|
|
1889 #if 0 /* FSFmacs */
|
|
|
1890 if (!NILP (h.var))
|
|
|
1891 specbind (h.var, c.val);
|
|
|
1892 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1893
|
|
|
1894 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1895 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1896 throwing. */
|
|
771
|
1897 unbind_to (c.pdlcount);
|
|
428
|
1898 return val;
|
|
|
1899 #else
|
|
|
1900 int speccount;
|
|
|
1901
|
|
|
1902 CHECK_TRUE_LIST (val);
|
|
|
1903 if (NILP (var))
|
|
|
1904 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1905
|
|
|
1906 speccount = specpdl_depth();
|
|
|
1907 specbind (var, Fcar (val));
|
|
|
1908 val = Fprogn (Fcdr (val));
|
|
771
|
1909 return unbind_to_1 (speccount, val);
|
|
428
|
1910 #endif
|
|
|
1911 }
|
|
|
1912
|
|
|
1913 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1914 condition-case except that it takes three arguments rather
|
|
|
1915 than a single list of arguments. */
|
|
|
1916 Lisp_Object
|
|
|
1917 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1918 {
|
|
|
1919 /* This function can GC */
|
|
|
1920 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1921 {
|
|
|
1922 if (NILP (handler))
|
|
|
1923 ;
|
|
|
1924 else if (CONSP (handler))
|
|
|
1925 {
|
|
|
1926 Lisp_Object conditions = XCAR (handler);
|
|
|
1927 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1928 if (SYMBOLP (conditions))
|
|
|
1929 ;
|
|
|
1930 else
|
|
|
1931 {
|
|
|
1932 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1933 if (!SYMBOLP (condition))
|
|
|
1934 goto invalid_condition_handler;
|
|
|
1935 }
|
|
|
1936 }
|
|
|
1937 else
|
|
|
1938 {
|
|
|
1939 invalid_condition_handler:
|
|
563
|
1940 sferror ("Invalid condition handler", handler);
|
|
428
|
1941 }
|
|
|
1942 }
|
|
|
1943
|
|
|
1944 CHECK_SYMBOL (var);
|
|
|
1945
|
|
|
1946 return condition_case_1 (handlers,
|
|
|
1947 Feval, bodyform,
|
|
|
1948 run_condition_case_handlers,
|
|
|
1949 var);
|
|
|
1950 }
|
|
|
1951
|
|
|
1952 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
1953 Regain control when an error is signalled.
|
|
|
1954 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1955 Executes BODYFORM and returns its value if no error happens.
|
|
|
1956 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1957 where the BODY is made of Lisp expressions.
|
|
|
1958
|
|
771
|
1959 A typical usage of `condition-case' looks like this:
|
|
|
1960
|
|
|
1961 (condition-case nil
|
|
|
1962 ;; you need a progn here if you want more than one statement ...
|
|
|
1963 (progn
|
|
|
1964 (do-something)
|
|
|
1965 (do-something-else))
|
|
|
1966 (error
|
|
|
1967 (issue-warning-or)
|
|
|
1968 ;; but strangely, you don't need one here.
|
|
|
1969 (return-a-value-etc)
|
|
|
1970 ))
|
|
|
1971
|
|
428
|
1972 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1973 error's condition names. If an error happens, the first applicable
|
|
|
1974 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1975 all errors, even those without the `error' condition name on them
|
|
|
1976 \(e.g. `quit').
|
|
|
1977
|
|
|
1978 The car of a handler may be a list of condition names
|
|
|
1979 instead of a single condition name.
|
|
|
1980
|
|
|
1981 When a handler handles an error,
|
|
|
1982 control returns to the condition-case and the handler BODY... is executed
|
|
|
1983 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1984 VAR may be nil; then you do not get access to the signal information.
|
|
|
1985
|
|
|
1986 The value of the last BODY form is returned from the condition-case.
|
|
|
1987 See also the function `signal' for more info.
|
|
|
1988
|
|
|
1989 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1990 and the current catches, condition-cases, and bindings have all been
|
|
|
1991 popped back to the state they were in just before the call to
|
|
|
1992 `condition-case'. This means that resignalling the error from
|
|
|
1993 within the handler will not result in an infinite loop.
|
|
|
1994
|
|
|
1995 If you want to establish an error handler that is called with the
|
|
|
1996 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1997 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
1998 */
|
|
|
1999 (args))
|
|
|
2000 {
|
|
|
2001 /* This function can GC */
|
|
|
2002 Lisp_Object var = XCAR (args);
|
|
|
2003 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
2004 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
2005 return condition_case_3 (bodyform, var, handlers);
|
|
|
2006 }
|
|
|
2007
|
|
|
2008 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
2009 Regain control when an error is signalled, without popping the stack.
|
|
|
2010 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
2011 This function is similar to `condition-case', but the handler is invoked
|
|
|
2012 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
2013 that was current when `signal' was called, rather than when the handler
|
|
|
2014 was established.
|
|
|
2015
|
|
|
2016 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
2017 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
2018 `signal' is called (this differs from `condition-case', which allows
|
|
|
2019 you to specify which errors are trapped). If the handler function
|
|
|
2020 returns, `signal' continues as if the handler were never invoked.
|
|
|
2021 \(It continues to look for handlers established earlier than this one,
|
|
|
2022 and invokes the standard error-handler if none is found.)
|
|
|
2023 */
|
|
|
2024 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
2025 {
|
|
|
2026 /* This function can GC */
|
|
|
2027 int speccount = specpdl_depth();
|
|
|
2028 Lisp_Object tem;
|
|
|
2029
|
|
853
|
2030 tem = Ffunction_max_args (args[0]);
|
|
|
2031 if (! (XINT (Ffunction_min_args (args[0])) <= 1
|
|
|
2032 && (NILP (tem) || 1 <= XINT (tem))))
|
|
|
2033 invalid_argument ("Must be function of one argument", args[0]);
|
|
|
2034
|
|
|
2035 /* (handler-fun . handler-args) but currently there are no handler-args */
|
|
428
|
2036 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
2037 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2038 Vcondition_handlers = tem;
|
|
|
2039
|
|
|
2040 /* Caller should have GC-protected args */
|
|
771
|
2041 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1));
|
|
428
|
2042 }
|
|
|
2043
|
|
853
|
2044 /* This is the C version of the above function. It calls FUN, passing it
|
|
|
2045 ARG, first setting up HANDLER to catch signals in the environment in
|
|
|
2046 which they were signalled. (HANDLER is only invoked if there was no
|
|
|
2047 handler (either from condition-case or call-with-condition-handler) set
|
|
|
2048 later on that handled the signal; therefore, this is a real error.
|
|
|
2049
|
|
|
2050 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as
|
|
|
2051 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and
|
|
|
2052 ARG be void * to facilitate passing structures, but I changed to
|
|
|
2053 Lisp_Objects because all the other C interfaces to catch/condition-case/etc.
|
|
|
2054 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al.
|
|
|
2055 to convert between Lisp_Objects and structure pointers. */
|
|
|
2056
|
|
|
2057 Lisp_Object
|
|
|
2058 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object,
|
|
|
2059 Lisp_Object),
|
|
|
2060 Lisp_Object handler_arg,
|
|
|
2061 Lisp_Object (*fun) (Lisp_Object),
|
|
|
2062 Lisp_Object arg)
|
|
|
2063 {
|
|
|
2064 /* This function can GC */
|
|
|
2065 int speccount = specpdl_depth();
|
|
|
2066 Lisp_Object tem;
|
|
|
2067
|
|
|
2068 /* ((handler-fun . (handler-arg . nil)) ... ) */
|
|
|
2069 tem = noseeum_cons (noseeum_cons (make_opaque_ptr (handler),
|
|
|
2070 noseeum_cons (handler_arg, Qnil)),
|
|
|
2071 Vcondition_handlers);
|
|
|
2072 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
2073 Vcondition_handlers = tem;
|
|
|
2074
|
|
|
2075 return unbind_to_1 (speccount, (*fun) (arg));
|
|
|
2076 }
|
|
|
2077
|
|
428
|
2078 static int
|
|
|
2079 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
2080 {
|
|
|
2081 if (EQ (type, Qt))
|
|
|
2082 /* (condition-case c # (t c)) catches -all- signals
|
|
|
2083 * Use with caution! */
|
|
|
2084 return 1;
|
|
|
2085
|
|
|
2086 if (SYMBOLP (type))
|
|
|
2087 return !NILP (Fmemq (type, conditions));
|
|
|
2088
|
|
|
2089 for (; CONSP (type); type = XCDR (type))
|
|
|
2090 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
2091 return 1;
|
|
|
2092
|
|
|
2093 return 0;
|
|
|
2094 }
|
|
|
2095
|
|
|
2096 static Lisp_Object
|
|
|
2097 return_from_signal (Lisp_Object value)
|
|
|
2098 {
|
|
|
2099 #if 1
|
|
|
2100 /* Most callers are not prepared to handle gc if this
|
|
|
2101 returns. So, since this feature is not very useful,
|
|
|
2102 take it out. */
|
|
|
2103 /* Have called debugger; return value to signaller */
|
|
|
2104 return value;
|
|
|
2105 #else /* But the reality is that that stinks, because: */
|
|
|
2106 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
2107 to be continuable!! */
|
|
563
|
2108 signal_error (Qunimplemented,
|
|
|
2109 "Returning a value from an error is no longer supported",
|
|
|
2110 Qunbound);
|
|
428
|
2111 #endif
|
|
|
2112 }
|
|
|
2113
|
|
|
2114 extern int in_display;
|
|
|
2115
|
|
|
2116
|
|
|
2117 /************************************************************************/
|
|
|
2118 /* the workhorse error-signaling function */
|
|
|
2119 /************************************************************************/
|
|
|
2120
|
|
853
|
2121 /* This exists only for debugging purposes, as a place to put a breakpoint
|
|
|
2122 that won't get signalled for errors occurring when
|
|
|
2123 call_with_suspended_errors() was invoked. */
|
|
|
2124
|
|
872
|
2125 /* Don't make static or it might be compiled away */
|
|
|
2126 void signal_1 (void);
|
|
|
2127
|
|
|
2128 void
|
|
853
|
2129 signal_1 (void)
|
|
|
2130 {
|
|
|
2131 }
|
|
|
2132
|
|
428
|
2133 /* #### This function has not been synched with FSF. It diverges
|
|
|
2134 significantly. */
|
|
|
2135
|
|
853
|
2136 /* The simplest external error function: it would be called
|
|
|
2137 signal_continuable_error() in the terminology below, but it's
|
|
|
2138 Lisp-callable. */
|
|
|
2139
|
|
|
2140 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2141 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2142 An error symbol is a symbol defined using `define-error'.
|
|
|
2143 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2144 If the signal is handled, DATA is made available to the handler.
|
|
|
2145 See also the function `signal-error', and the functions to handle errors:
|
|
|
2146 `condition-case' and `call-with-condition-handler'.
|
|
|
2147
|
|
|
2148 Note that this function can return, if the debugger is invoked and the
|
|
|
2149 user invokes the "return from signal" option.
|
|
|
2150 */
|
|
|
2151 (error_symbol, data))
|
|
428
|
2152 {
|
|
|
2153 /* This function can GC */
|
|
853
|
2154 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2155 Lisp_Object conditions = Qnil;
|
|
|
2156 Lisp_Object handlers = Qnil;
|
|
428
|
2157 /* signal_call_debugger() could get called more than once
|
|
|
2158 (once when a call-with-condition-handler is about to
|
|
|
2159 be dealt with, and another when a condition-case handler
|
|
|
2160 is about to be invoked). So make sure the debugger and/or
|
|
|
2161 stack trace aren't done more than once. */
|
|
|
2162 int stack_trace_displayed = 0;
|
|
|
2163 int debugger_entered = 0;
|
|
853
|
2164
|
|
|
2165 /* Fsignal() is one of these functions that's called all the time
|
|
|
2166 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2167 protect the objects because all sorts of weird stuff could
|
|
|
2168 happen. */
|
|
|
2169
|
|
|
2170 GCPRO4 (conditions, handlers, error_symbol, data);
|
|
|
2171
|
|
|
2172 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS))
|
|
|
2173 signal_1 ();
|
|
428
|
2174
|
|
|
2175 if (!initialized)
|
|
|
2176 {
|
|
|
2177 /* who knows how much has been initialized? Safest bet is
|
|
|
2178 just to bomb out immediately. */
|
|
771
|
2179 stderr_out ("Error before initialization is complete!\n");
|
|
428
|
2180 abort ();
|
|
|
2181 }
|
|
|
2182
|
|
853
|
2183 if (gc_in_progress)
|
|
|
2184 /* We used to abort if in_display:
|
|
|
2185
|
|
|
2186 [[This is one of many reasons why you can't run lisp code from
|
|
|
2187 redisplay. There is no sensible way to handle errors there.]]
|
|
|
2188
|
|
|
2189 The above comment is not correct.
|
|
|
2190
|
|
|
2191 Inhibit GC until the redisplay code is careful enough to properly
|
|
|
2192 GCPRO their structures;
|
|
|
2193
|
|
|
2194 Surround all calls to Lisp code with error-trapping wrappers that
|
|
|
2195 catch all errors. --ben */
|
|
428
|
2196 abort ();
|
|
|
2197
|
|
853
|
2198 conditions = Fget (error_symbol, Qerror_conditions, Qnil);
|
|
428
|
2199
|
|
|
2200 for (handlers = Vcondition_handlers;
|
|
|
2201 CONSP (handlers);
|
|
|
2202 handlers = XCDR (handlers))
|
|
|
2203 {
|
|
|
2204 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
2205 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
2206 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
2207
|
|
|
2208 if (!UNBOUNDP (handler_fun))
|
|
|
2209 {
|
|
|
2210 /* call-with-condition-handler */
|
|
|
2211 Lisp_Object tem;
|
|
|
2212 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
2213 struct gcpro ngcpro1;
|
|
|
2214 NGCPRO1 (all_handlers);
|
|
|
2215 Vcondition_handlers = outer_handlers;
|
|
|
2216
|
|
853
|
2217 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2218 outer_handlers, 1,
|
|
|
2219 &stack_trace_displayed,
|
|
|
2220 &debugger_entered);
|
|
|
2221 if (!UNBOUNDP (tem))
|
|
|
2222 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
2223
|
|
853
|
2224 if (OPAQUE_PTRP (handler_fun))
|
|
|
2225 {
|
|
|
2226 if (NILP (handler_data))
|
|
|
2227 {
|
|
|
2228 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) =
|
|
|
2229 (Lisp_Object (*) (Lisp_Object, Lisp_Object))
|
|
|
2230 (get_opaque_ptr (handler_fun));
|
|
|
2231
|
|
|
2232 tem = (*hfun) (error_symbol, data);
|
|
|
2233 }
|
|
|
2234 else
|
|
|
2235 {
|
|
|
2236 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) =
|
|
|
2237 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object))
|
|
|
2238 (get_opaque_ptr (handler_fun));
|
|
|
2239
|
|
|
2240 assert (NILP (XCDR (handler_data)));
|
|
|
2241 tem = (*hfun) (error_symbol, data, XCAR (handler_data));
|
|
|
2242 }
|
|
|
2243 }
|
|
|
2244 else
|
|
|
2245 {
|
|
|
2246 tem = Fcons (error_symbol, data);
|
|
|
2247 if (NILP (handler_data))
|
|
|
2248 tem = call1 (handler_fun, tem);
|
|
|
2249 else
|
|
|
2250 {
|
|
|
2251 /* (This code won't be used (for now?).) */
|
|
|
2252 struct gcpro nngcpro1;
|
|
|
2253 Lisp_Object args[3];
|
|
|
2254 NNGCPRO1 (args[0]);
|
|
|
2255 nngcpro1.nvars = 3;
|
|
|
2256 args[0] = handler_fun;
|
|
|
2257 args[1] = tem;
|
|
|
2258 args[2] = handler_data;
|
|
|
2259 nngcpro1.var = args;
|
|
|
2260 tem = Fapply (3, args);
|
|
|
2261 NNUNGCPRO;
|
|
|
2262 }
|
|
|
2263 }
|
|
428
|
2264 NUNGCPRO;
|
|
|
2265 #if 0
|
|
|
2266 if (!EQ (tem, Qsignal))
|
|
|
2267 return return_from_signal (tem);
|
|
|
2268 #endif
|
|
|
2269 /* If handler didn't throw, try another handler */
|
|
|
2270 Vcondition_handlers = all_handlers;
|
|
|
2271 }
|
|
|
2272
|
|
|
2273 /* It's a condition-case handler */
|
|
|
2274
|
|
|
2275 /* t is used by handlers for all conditions, set up by C code.
|
|
|
2276 * debugger is not called even if debug_on_error */
|
|
|
2277 else if (EQ (handler_data, Qt))
|
|
|
2278 {
|
|
|
2279 UNGCPRO;
|
|
853
|
2280 return Fthrow (handlers, Fcons (error_symbol, data));
|
|
428
|
2281 }
|
|
|
2282 /* `error' is used similarly to the way `t' is used, but in
|
|
|
2283 addition it invokes the debugger if debug_on_error.
|
|
|
2284 This is normally used for the outer command-loop error
|
|
|
2285 handler. */
|
|
|
2286 else if (EQ (handler_data, Qerror))
|
|
|
2287 {
|
|
853
|
2288 Lisp_Object tem = signal_call_debugger (conditions, error_symbol,
|
|
|
2289 data,
|
|
428
|
2290 outer_handlers, 0,
|
|
|
2291 &stack_trace_displayed,
|
|
|
2292 &debugger_entered);
|
|
|
2293
|
|
|
2294 UNGCPRO;
|
|
|
2295 if (!UNBOUNDP (tem))
|
|
|
2296 return return_from_signal (tem);
|
|
|
2297
|
|
853
|
2298 tem = Fcons (error_symbol, data);
|
|
428
|
2299 return Fthrow (handlers, tem);
|
|
|
2300 }
|
|
|
2301 else
|
|
|
2302 {
|
|
|
2303 /* handler established by real (Lisp) condition-case */
|
|
|
2304 Lisp_Object h;
|
|
|
2305
|
|
|
2306 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
2307 {
|
|
|
2308 Lisp_Object clause = Fcar (h);
|
|
|
2309 Lisp_Object tem = Fcar (clause);
|
|
|
2310
|
|
|
2311 if (condition_type_p (tem, conditions))
|
|
|
2312 {
|
|
853
|
2313 tem = signal_call_debugger (conditions, error_symbol, data,
|
|
428
|
2314 outer_handlers, 1,
|
|
|
2315 &stack_trace_displayed,
|
|
|
2316 &debugger_entered);
|
|
|
2317 UNGCPRO;
|
|
|
2318 if (!UNBOUNDP (tem))
|
|
|
2319 return return_from_signal (tem);
|
|
|
2320
|
|
|
2321 /* Doesn't return */
|
|
853
|
2322 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause));
|
|
428
|
2323 return Fthrow (handlers, tem);
|
|
|
2324 }
|
|
|
2325 }
|
|
|
2326 }
|
|
|
2327 }
|
|
|
2328
|
|
|
2329 /* If no handler is present now, try to run the debugger,
|
|
|
2330 and if that fails, throw to top level.
|
|
|
2331
|
|
|
2332 #### The only time that no handler is present is during
|
|
|
2333 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
2334 there is no 'top-level catch. (That's why the
|
|
|
2335 "bomb-out" hack was added.)
|
|
|
2336
|
|
853
|
2337 [[#### Fix this horrifitude!]]
|
|
|
2338
|
|
|
2339 I don't think this is horrifitude, but just defensive coding. --ben */
|
|
|
2340
|
|
|
2341 signal_call_debugger (conditions, error_symbol, data, Qnil, 0,
|
|
428
|
2342 &stack_trace_displayed,
|
|
|
2343 &debugger_entered);
|
|
|
2344 UNGCPRO;
|
|
853
|
2345 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol,
|
|
|
2346 data); /* Doesn't return */
|
|
428
|
2347 return Qnil;
|
|
|
2348 }
|
|
|
2349
|
|
|
2350 /****************** Error functions class 1 ******************/
|
|
|
2351
|
|
|
2352 /* Class 1: General functions that signal an error.
|
|
|
2353 These functions take an error type and a list of associated error
|
|
|
2354 data. */
|
|
|
2355
|
|
853
|
2356 /* No signal_continuable_error_1(); it's called Fsignal(). */
|
|
428
|
2357
|
|
|
2358 /* Signal a non-continuable error. */
|
|
|
2359
|
|
|
2360 DOESNT_RETURN
|
|
563
|
2361 signal_error_1 (Lisp_Object sig, Lisp_Object data)
|
|
428
|
2362 {
|
|
|
2363 for (;;)
|
|
|
2364 Fsignal (sig, data);
|
|
|
2365 }
|
|
853
|
2366
|
|
|
2367 #ifdef ERROR_CHECK_CATCH
|
|
|
2368
|
|
|
2369 void
|
|
|
2370 check_catchlist_sanity (void)
|
|
|
2371 {
|
|
|
2372 #if 0
|
|
|
2373 /* vou me tomar no cu! i just masked andy's missing-unbind
|
|
|
2374 bug! */
|
|
442
|
2375 struct catchtag *c;
|
|
|
2376 int found_error_tag = 0;
|
|
|
2377
|
|
|
2378 for (c = catchlist; c; c = c->next)
|
|
|
2379 {
|
|
|
2380 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2381 {
|
|
|
2382 found_error_tag = 1;
|
|
|
2383 break;
|
|
|
2384 }
|
|
|
2385 }
|
|
|
2386
|
|
|
2387 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
853
|
2388 #endif /* vou me tomar no cul */
|
|
|
2389 }
|
|
|
2390
|
|
|
2391 void
|
|
|
2392 check_specbind_stack_sanity (void)
|
|
|
2393 {
|
|
|
2394 }
|
|
|
2395
|
|
|
2396 #endif /* ERROR_CHECK_CATCH */
|
|
428
|
2397
|
|
|
2398 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2399 according to ERRB. CLASS is the class of warning and should
|
|
|
2400 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2401 Qresource, etc.). */
|
|
|
2402
|
|
|
2403 void
|
|
563
|
2404 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
578
|
2405 Error_Behavior errb)
|
|
428
|
2406 {
|
|
|
2407 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2408 return;
|
|
793
|
2409 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
2410 warn_when_safe_lispobj (class, Qdebug, Fcons (sig, data));
|
|
428
|
2411 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2412 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2413 else
|
|
|
2414 for (;;)
|
|
|
2415 Fsignal (sig, data);
|
|
|
2416 }
|
|
|
2417
|
|
|
2418 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2419 according to ERRB. */
|
|
|
2420
|
|
|
2421 Lisp_Object
|
|
563
|
2422 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data,
|
|
578
|
2423 Lisp_Object class, Error_Behavior errb)
|
|
428
|
2424 {
|
|
|
2425 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2426 return Qnil;
|
|
793
|
2427 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
2428 {
|
|
|
2429 warn_when_safe_lispobj (class, Qdebug, Fcons (sig, data));
|
|
|
2430 return Qnil;
|
|
|
2431 }
|
|
428
|
2432 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2433 {
|
|
|
2434 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2435 return Qnil;
|
|
|
2436 }
|
|
|
2437 else
|
|
|
2438 return Fsignal (sig, data);
|
|
|
2439 }
|
|
|
2440
|
|
|
2441
|
|
|
2442 /****************** Error functions class 2 ******************/
|
|
|
2443
|
|
563
|
2444 /* Class 2: Signal an error with a string and an associated object.
|
|
|
2445 Normally these functions are used to attach one associated object,
|
|
|
2446 but to attach no objects, specify Qunbound for FROB, and for more
|
|
|
2447 than one object, make a list of the objects with Qunbound as the
|
|
|
2448 first element. (If you have specifically two objects to attach,
|
|
|
2449 consider using the function in class 3 below.) These functions
|
|
|
2450 signal an error of a specified type, whose data is one or more
|
|
|
2451 objects (usually two), a string the related Lisp object(s)
|
|
|
2452 specified as FROB. */
|
|
|
2453
|
|
|
2454 /* Out of REASON and FROB, return a list of elements suitable for passing
|
|
|
2455 to signal_error_1(). */
|
|
|
2456
|
|
|
2457 Lisp_Object
|
|
867
|
2458 build_error_data (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2459 {
|
|
|
2460 if (EQ (frob, Qunbound))
|
|
|
2461 frob = Qnil;
|
|
|
2462 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound))
|
|
|
2463 frob = XCDR (frob);
|
|
|
2464 else
|
|
|
2465 frob = list1 (frob);
|
|
|
2466 if (!reason)
|
|
|
2467 return frob;
|
|
|
2468 else
|
|
771
|
2469 return Fcons (build_msg_string (reason), frob);
|
|
563
|
2470 }
|
|
|
2471
|
|
|
2472 DOESNT_RETURN
|
|
867
|
2473 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2474 {
|
|
|
2475 signal_error_1 (type, build_error_data (reason, frob));
|
|
|
2476 }
|
|
|
2477
|
|
|
2478 void
|
|
867
|
2479 maybe_signal_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2480 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2481 Error_Behavior errb)
|
|
563
|
2482 {
|
|
|
2483 /* Optimization: */
|
|
|
2484 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2485 return;
|
|
|
2486 maybe_signal_error_1 (type, build_error_data (reason, frob), class, errb);
|
|
|
2487 }
|
|
|
2488
|
|
|
2489 Lisp_Object
|
|
867
|
2490 signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2491 Lisp_Object frob)
|
|
|
2492 {
|
|
|
2493 return Fsignal (type, build_error_data (reason, frob));
|
|
|
2494 }
|
|
|
2495
|
|
|
2496 Lisp_Object
|
|
867
|
2497 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2498 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2499 Error_Behavior errb)
|
|
563
|
2500 {
|
|
|
2501 /* Optimization: */
|
|
|
2502 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2503 return Qnil;
|
|
|
2504 return maybe_signal_continuable_error_1 (type,
|
|
|
2505 build_error_data (reason, frob),
|
|
|
2506 class, errb);
|
|
|
2507 }
|
|
|
2508
|
|
|
2509
|
|
|
2510 /****************** Error functions class 3 ******************/
|
|
|
2511
|
|
|
2512 /* Class 3: Signal an error with a string and two associated objects.
|
|
|
2513 These functions signal an error of a specified type, whose data
|
|
|
2514 is three objects, a string and two related Lisp objects.
|
|
|
2515 (The equivalent could be accomplished using the class 2 functions,
|
|
|
2516 but these are more convenient in this particular case.) */
|
|
|
2517
|
|
|
2518 DOESNT_RETURN
|
|
867
|
2519 signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2520 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2521 {
|
|
771
|
2522 signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2523 frob1));
|
|
|
2524 }
|
|
|
2525
|
|
|
2526 void
|
|
867
|
2527 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2528 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2529 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2530 {
|
|
|
2531 /* Optimization: */
|
|
|
2532 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2533 return;
|
|
771
|
2534 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2535 frob1), class, errb);
|
|
|
2536 }
|
|
|
2537
|
|
|
2538 Lisp_Object
|
|
867
|
2539 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2540 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2541 {
|
|
771
|
2542 return Fsignal (type, list3 (build_msg_string (reason), frob0,
|
|
563
|
2543 frob1));
|
|
|
2544 }
|
|
|
2545
|
|
|
2546 Lisp_Object
|
|
867
|
2547 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason,
|
|
563
|
2548 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2549 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2550 {
|
|
|
2551 /* Optimization: */
|
|
|
2552 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2553 return Qnil;
|
|
|
2554 return maybe_signal_continuable_error_1
|
|
771
|
2555 (type, list3 (build_msg_string (reason), frob0, frob1),
|
|
563
|
2556 class, errb);
|
|
|
2557 }
|
|
|
2558
|
|
|
2559
|
|
|
2560 /****************** Error functions class 4 ******************/
|
|
|
2561
|
|
|
2562 /* Class 4: Printf-like functions that signal an error.
|
|
442
|
2563 These functions signal an error of a specified type, whose data
|
|
428
|
2564 is a single string, created using the arguments. */
|
|
|
2565
|
|
|
2566 DOESNT_RETURN
|
|
867
|
2567 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
442
|
2568 {
|
|
|
2569 Lisp_Object obj;
|
|
|
2570 va_list args;
|
|
|
2571
|
|
|
2572 va_start (args, fmt);
|
|
771
|
2573 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2574 va_end (args);
|
|
|
2575
|
|
|
2576 /* Fsignal GC-protects its args */
|
|
563
|
2577 signal_error (type, 0, obj);
|
|
442
|
2578 }
|
|
|
2579
|
|
|
2580 void
|
|
578
|
2581 maybe_signal_ferror (Lisp_Object type, Lisp_Object class, Error_Behavior errb,
|
|
867
|
2582 const CIbyte *fmt, ...)
|
|
442
|
2583 {
|
|
|
2584 Lisp_Object obj;
|
|
|
2585 va_list args;
|
|
|
2586
|
|
|
2587 /* Optimization: */
|
|
|
2588 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2589 return;
|
|
|
2590
|
|
|
2591 va_start (args, fmt);
|
|
771
|
2592 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2593 va_end (args);
|
|
|
2594
|
|
|
2595 /* Fsignal GC-protects its args */
|
|
563
|
2596 maybe_signal_error (type, 0, obj, class, errb);
|
|
442
|
2597 }
|
|
|
2598
|
|
|
2599 Lisp_Object
|
|
867
|
2600 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...)
|
|
428
|
2601 {
|
|
|
2602 Lisp_Object obj;
|
|
|
2603 va_list args;
|
|
|
2604
|
|
|
2605 va_start (args, fmt);
|
|
771
|
2606 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2607 va_end (args);
|
|
|
2608
|
|
|
2609 /* Fsignal GC-protects its args */
|
|
|
2610 return Fsignal (type, list1 (obj));
|
|
|
2611 }
|
|
|
2612
|
|
|
2613 Lisp_Object
|
|
563
|
2614 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class,
|
|
867
|
2615 Error_Behavior errb, const CIbyte *fmt, ...)
|
|
442
|
2616 {
|
|
|
2617 Lisp_Object obj;
|
|
|
2618 va_list args;
|
|
|
2619
|
|
|
2620 /* Optimization: */
|
|
|
2621 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2622 return Qnil;
|
|
|
2623
|
|
|
2624 va_start (args, fmt);
|
|
771
|
2625 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2626 va_end (args);
|
|
|
2627
|
|
|
2628 /* Fsignal GC-protects its args */
|
|
563
|
2629 return maybe_signal_continuable_error (type, 0, obj, class, errb);
|
|
442
|
2630 }
|
|
|
2631
|
|
|
2632
|
|
|
2633 /****************** Error functions class 5 ******************/
|
|
|
2634
|
|
563
|
2635 /* Class 5: Printf-like functions that signal an error.
|
|
442
|
2636 These functions signal an error of a specified type, whose data
|
|
563
|
2637 is a one or more objects, a string (created using the arguments)
|
|
|
2638 and additional Lisp objects specified in FROB. (The syntax of FROB
|
|
|
2639 is the same as for class 2.)
|
|
|
2640
|
|
|
2641 There is no need for a class 6 because you can always attach 2
|
|
|
2642 objects using class 5 (for FROB, specify a list with three
|
|
|
2643 elements, the first of which is Qunbound), and these functions are
|
|
|
2644 not commonly used.
|
|
|
2645 */
|
|
442
|
2646
|
|
|
2647 DOESNT_RETURN
|
|
867
|
2648 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt,
|
|
563
|
2649 ...)
|
|
442
|
2650 {
|
|
|
2651 Lisp_Object obj;
|
|
|
2652 va_list args;
|
|
|
2653
|
|
|
2654 va_start (args, fmt);
|
|
771
|
2655 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
442
|
2656 va_end (args);
|
|
|
2657
|
|
|
2658 /* Fsignal GC-protects its args */
|
|
563
|
2659 signal_error_1 (type, Fcons (obj, build_error_data (0, frob)));
|
|
442
|
2660 }
|
|
|
2661
|
|
|
2662 void
|
|
563
|
2663 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
578
|
2664 Lisp_Object class, Error_Behavior errb,
|
|
867
|
2665 const CIbyte *fmt, ...)
|
|
442
|
2666 {
|
|
|
2667 Lisp_Object obj;
|
|
|
2668 va_list args;
|
|
|
2669
|
|
|
2670 /* Optimization: */
|
|
|
2671 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2672 return;
|
|
|
2673
|
|
|
2674 va_start (args, fmt);
|
|
771
|
2675 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2676 va_end (args);
|
|
|
2677
|
|
|
2678 /* Fsignal GC-protects its args */
|
|
563
|
2679 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class,
|
|
|
2680 errb);
|
|
428
|
2681 }
|
|
|
2682
|
|
|
2683 Lisp_Object
|
|
563
|
2684 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
867
|
2685 const CIbyte *fmt, ...)
|
|
428
|
2686 {
|
|
|
2687 Lisp_Object obj;
|
|
|
2688 va_list args;
|
|
|
2689
|
|
|
2690 va_start (args, fmt);
|
|
771
|
2691 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2692 va_end (args);
|
|
|
2693
|
|
|
2694 /* Fsignal GC-protects its args */
|
|
563
|
2695 return Fsignal (type, Fcons (obj, build_error_data (0, frob)));
|
|
428
|
2696 }
|
|
|
2697
|
|
|
2698 Lisp_Object
|
|
563
|
2699 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2700 Lisp_Object class,
|
|
578
|
2701 Error_Behavior errb,
|
|
867
|
2702 const CIbyte *fmt, ...)
|
|
428
|
2703 {
|
|
|
2704 Lisp_Object obj;
|
|
|
2705 va_list args;
|
|
|
2706
|
|
|
2707 /* Optimization: */
|
|
|
2708 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2709 return Qnil;
|
|
|
2710
|
|
|
2711 va_start (args, fmt);
|
|
771
|
2712 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
2713 va_end (args);
|
|
|
2714
|
|
|
2715 /* Fsignal GC-protects its args */
|
|
563
|
2716 return maybe_signal_continuable_error_1 (type,
|
|
|
2717 Fcons (obj,
|
|
|
2718 build_error_data (0, frob)),
|
|
|
2719 class, errb);
|
|
428
|
2720 }
|
|
|
2721
|
|
|
2722
|
|
|
2723 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2724 void
|
|
|
2725 signal_quit (void)
|
|
|
2726 {
|
|
853
|
2727 /* This function cannot GC. GC is prohibited because most callers do
|
|
|
2728 not expect GC occurring in QUIT. Remove this if/when that gets fixed.
|
|
|
2729 --ben */
|
|
|
2730
|
|
|
2731 int count;
|
|
|
2732
|
|
428
|
2733 if (EQ (Vquit_flag, Qcritical))
|
|
|
2734 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2735 Vquit_flag = Qnil;
|
|
853
|
2736 count = begin_gc_forbidden ();
|
|
428
|
2737 /* note that this is continuable. */
|
|
|
2738 Fsignal (Qquit, Qnil);
|
|
853
|
2739 unbind_to (count);
|
|
428
|
2740 }
|
|
|
2741
|
|
|
2742
|
|
563
|
2743 /************************ convenience error functions ***********************/
|
|
|
2744
|
|
436
|
2745 Lisp_Object
|
|
428
|
2746 signal_void_function_error (Lisp_Object function)
|
|
|
2747 {
|
|
436
|
2748 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2749 }
|
|
|
2750
|
|
436
|
2751 Lisp_Object
|
|
428
|
2752 signal_invalid_function_error (Lisp_Object function)
|
|
|
2753 {
|
|
436
|
2754 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2755 }
|
|
|
2756
|
|
436
|
2757 Lisp_Object
|
|
428
|
2758 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2759 {
|
|
436
|
2760 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2761 list2 (function, make_int (nargs)));
|
|
428
|
2762 }
|
|
|
2763
|
|
|
2764 /* Used in list traversal macros for efficiency. */
|
|
436
|
2765 DOESNT_RETURN
|
|
428
|
2766 signal_malformed_list_error (Lisp_Object list)
|
|
|
2767 {
|
|
563
|
2768 signal_error (Qmalformed_list, 0, list);
|
|
428
|
2769 }
|
|
|
2770
|
|
436
|
2771 DOESNT_RETURN
|
|
428
|
2772 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2773 {
|
|
563
|
2774 signal_error (Qmalformed_property_list, 0, list);
|
|
428
|
2775 }
|
|
|
2776
|
|
436
|
2777 DOESNT_RETURN
|
|
428
|
2778 signal_circular_list_error (Lisp_Object list)
|
|
|
2779 {
|
|
563
|
2780 signal_error (Qcircular_list, 0, list);
|
|
428
|
2781 }
|
|
|
2782
|
|
436
|
2783 DOESNT_RETURN
|
|
428
|
2784 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2785 {
|
|
563
|
2786 signal_error (Qcircular_property_list, 0, list);
|
|
428
|
2787 }
|
|
442
|
2788
|
|
|
2789 DOESNT_RETURN
|
|
867
|
2790 syntax_error (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2791 {
|
|
563
|
2792 signal_error (Qsyntax_error, reason, frob);
|
|
442
|
2793 }
|
|
|
2794
|
|
|
2795 DOESNT_RETURN
|
|
867
|
2796 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2797 {
|
|
563
|
2798 signal_error_2 (Qsyntax_error, reason, frob1, frob2);
|
|
|
2799 }
|
|
|
2800
|
|
|
2801 void
|
|
867
|
2802 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2803 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2804 {
|
|
|
2805 maybe_signal_error (Qsyntax_error, reason, frob, class, errb);
|
|
|
2806 }
|
|
|
2807
|
|
|
2808 DOESNT_RETURN
|
|
867
|
2809 sferror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2810 {
|
|
|
2811 signal_error (Qstructure_formation_error, reason, frob);
|
|
|
2812 }
|
|
|
2813
|
|
|
2814 DOESNT_RETURN
|
|
867
|
2815 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2816 {
|
|
|
2817 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2);
|
|
|
2818 }
|
|
|
2819
|
|
|
2820 void
|
|
867
|
2821 maybe_sferror (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2822 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2823 {
|
|
|
2824 maybe_signal_error (Qstructure_formation_error, reason, frob, class, errb);
|
|
442
|
2825 }
|
|
|
2826
|
|
|
2827 DOESNT_RETURN
|
|
867
|
2828 invalid_argument (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2829 {
|
|
563
|
2830 signal_error (Qinvalid_argument, reason, frob);
|
|
442
|
2831 }
|
|
|
2832
|
|
|
2833 DOESNT_RETURN
|
|
867
|
2834 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2835 Lisp_Object frob2)
|
|
442
|
2836 {
|
|
563
|
2837 signal_error_2 (Qinvalid_argument, reason, frob1, frob2);
|
|
|
2838 }
|
|
|
2839
|
|
|
2840 void
|
|
867
|
2841 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2842 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2843 {
|
|
|
2844 maybe_signal_error (Qinvalid_argument, reason, frob, class, errb);
|
|
|
2845 }
|
|
|
2846
|
|
|
2847 DOESNT_RETURN
|
|
867
|
2848 invalid_constant (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2849 {
|
|
|
2850 signal_error (Qinvalid_constant, reason, frob);
|
|
|
2851 }
|
|
|
2852
|
|
|
2853 DOESNT_RETURN
|
|
867
|
2854 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2855 Lisp_Object frob2)
|
|
563
|
2856 {
|
|
|
2857 signal_error_2 (Qinvalid_constant, reason, frob1, frob2);
|
|
|
2858 }
|
|
|
2859
|
|
|
2860 void
|
|
867
|
2861 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2862 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2863 {
|
|
|
2864 maybe_signal_error (Qinvalid_constant, reason, frob, class, errb);
|
|
442
|
2865 }
|
|
|
2866
|
|
|
2867 DOESNT_RETURN
|
|
867
|
2868 invalid_operation (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2869 {
|
|
563
|
2870 signal_error (Qinvalid_operation, reason, frob);
|
|
442
|
2871 }
|
|
|
2872
|
|
|
2873 DOESNT_RETURN
|
|
867
|
2874 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1,
|
|
609
|
2875 Lisp_Object frob2)
|
|
442
|
2876 {
|
|
563
|
2877 signal_error_2 (Qinvalid_operation, reason, frob1, frob2);
|
|
|
2878 }
|
|
|
2879
|
|
|
2880 void
|
|
867
|
2881 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2882 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2883 {
|
|
|
2884 maybe_signal_error (Qinvalid_operation, reason, frob, class, errb);
|
|
442
|
2885 }
|
|
|
2886
|
|
|
2887 DOESNT_RETURN
|
|
867
|
2888 invalid_change (const CIbyte *reason, Lisp_Object frob)
|
|
442
|
2889 {
|
|
563
|
2890 signal_error (Qinvalid_change, reason, frob);
|
|
442
|
2891 }
|
|
|
2892
|
|
|
2893 DOESNT_RETURN
|
|
867
|
2894 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
442
|
2895 {
|
|
563
|
2896 signal_error_2 (Qinvalid_change, reason, frob1, frob2);
|
|
|
2897 }
|
|
|
2898
|
|
|
2899 void
|
|
867
|
2900 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2901 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2902 {
|
|
|
2903 maybe_signal_error (Qinvalid_change, reason, frob, class, errb);
|
|
|
2904 }
|
|
|
2905
|
|
|
2906 DOESNT_RETURN
|
|
867
|
2907 invalid_state (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2908 {
|
|
|
2909 signal_error (Qinvalid_state, reason, frob);
|
|
|
2910 }
|
|
|
2911
|
|
|
2912 DOESNT_RETURN
|
|
867
|
2913 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
563
|
2914 {
|
|
|
2915 signal_error_2 (Qinvalid_state, reason, frob1, frob2);
|
|
|
2916 }
|
|
|
2917
|
|
|
2918 void
|
|
867
|
2919 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob,
|
|
578
|
2920 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2921 {
|
|
|
2922 maybe_signal_error (Qinvalid_state, reason, frob, class, errb);
|
|
|
2923 }
|
|
|
2924
|
|
|
2925 DOESNT_RETURN
|
|
867
|
2926 wtaerror (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2927 {
|
|
|
2928 signal_error (Qwrong_type_argument, reason, frob);
|
|
|
2929 }
|
|
|
2930
|
|
|
2931 DOESNT_RETURN
|
|
867
|
2932 stack_overflow (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2933 {
|
|
|
2934 signal_error (Qstack_overflow, reason, frob);
|
|
|
2935 }
|
|
|
2936
|
|
|
2937 DOESNT_RETURN
|
|
867
|
2938 out_of_memory (const CIbyte *reason, Lisp_Object frob)
|
|
563
|
2939 {
|
|
|
2940 signal_error (Qout_of_memory, reason, frob);
|
|
|
2941 }
|
|
|
2942
|
|
|
2943 DOESNT_RETURN
|
|
867
|
2944 printing_unreadable_object (const CIbyte *fmt, ...)
|
|
563
|
2945 {
|
|
|
2946 Lisp_Object obj;
|
|
|
2947 va_list args;
|
|
|
2948
|
|
|
2949 va_start (args, fmt);
|
|
771
|
2950 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
563
|
2951 va_end (args);
|
|
|
2952
|
|
|
2953 /* Fsignal GC-protects its args */
|
|
|
2954 signal_error (Qprinting_unreadable_object, 0, obj);
|
|
442
|
2955 }
|
|
|
2956
|
|
428
|
2957
|
|
|
2958 /************************************************************************/
|
|
|
2959 /* User commands */
|
|
|
2960 /************************************************************************/
|
|
|
2961
|
|
|
2962 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
2963 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
2964 This means it contains a description for how to read arguments to give it.
|
|
|
2965 The value is nil for an invalid function or a symbol with no function
|
|
|
2966 definition.
|
|
|
2967
|
|
|
2968 Interactively callable functions include
|
|
|
2969
|
|
|
2970 -- strings and vectors (treated as keyboard macros)
|
|
|
2971 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2972 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2973 (i.e. the interactive flag)
|
|
|
2974 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2975 value
|
|
|
2976 -- subrs (built-in functions) that are interactively callable
|
|
|
2977
|
|
|
2978 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
2979 */
|
|
|
2980 (function))
|
|
|
2981 {
|
|
|
2982 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2983
|
|
|
2984 if (COMPILED_FUNCTIONP (fun))
|
|
|
2985 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2986
|
|
|
2987 /* Lists may represent commands. */
|
|
|
2988 if (CONSP (fun))
|
|
|
2989 {
|
|
|
2990 Lisp_Object funcar = XCAR (fun);
|
|
|
2991 if (EQ (funcar, Qlambda))
|
|
|
2992 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2993 if (EQ (funcar, Qautoload))
|
|
|
2994 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2995 else
|
|
|
2996 return Qnil;
|
|
|
2997 }
|
|
|
2998
|
|
|
2999 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
3000 interactive spec. */
|
|
|
3001 if (SUBRP (fun))
|
|
|
3002 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
3003
|
|
|
3004 /* Strings and vectors are keyboard macros. */
|
|
|
3005 if (VECTORP (fun) || STRINGP (fun))
|
|
|
3006 return Qt;
|
|
|
3007
|
|
|
3008 /* Everything else (including Qunbound) is not a command. */
|
|
|
3009 return Qnil;
|
|
|
3010 }
|
|
|
3011
|
|
|
3012 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
3013 Execute CMD as an editor command.
|
|
|
3014 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
3015 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
3016 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
3017 when reading the arguments.
|
|
|
3018 */
|
|
444
|
3019 (cmd, record_flag, keys))
|
|
428
|
3020 {
|
|
|
3021 /* This function can GC */
|
|
|
3022 Lisp_Object prefixarg;
|
|
|
3023 Lisp_Object final = cmd;
|
|
|
3024 struct backtrace backtrace;
|
|
|
3025 struct console *con = XCONSOLE (Vselected_console);
|
|
|
3026
|
|
|
3027 prefixarg = con->prefix_arg;
|
|
|
3028 con->prefix_arg = Qnil;
|
|
|
3029 Vcurrent_prefix_arg = prefixarg;
|
|
|
3030 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
3031
|
|
|
3032 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
733
|
3033 return run_hook (Qdisabled_command_hook);
|
|
428
|
3034
|
|
|
3035 for (;;)
|
|
|
3036 {
|
|
|
3037 final = indirect_function (cmd, 1);
|
|
|
3038 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
3039 do_autoload (final, cmd);
|
|
|
3040 else
|
|
|
3041 break;
|
|
|
3042 }
|
|
|
3043
|
|
|
3044 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
3045 {
|
|
|
3046 backtrace.function = &Qcall_interactively;
|
|
|
3047 backtrace.args = &cmd;
|
|
|
3048 backtrace.nargs = 1;
|
|
|
3049 backtrace.evalargs = 0;
|
|
|
3050 backtrace.pdlcount = specpdl_depth();
|
|
|
3051 backtrace.debug_on_exit = 0;
|
|
|
3052 PUSH_BACKTRACE (backtrace);
|
|
|
3053
|
|
444
|
3054 final = Fcall_interactively (cmd, record_flag, keys);
|
|
428
|
3055
|
|
|
3056 POP_BACKTRACE (backtrace);
|
|
|
3057 return final;
|
|
|
3058 }
|
|
|
3059 else if (STRINGP (final) || VECTORP (final))
|
|
|
3060 {
|
|
|
3061 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
3062 }
|
|
|
3063 else
|
|
|
3064 {
|
|
|
3065 Fsignal (Qwrong_type_argument,
|
|
|
3066 Fcons (Qcommandp,
|
|
|
3067 (EQ (cmd, final)
|
|
|
3068 ? list1 (cmd)
|
|
|
3069 : list2 (cmd, final))));
|
|
|
3070 return Qnil;
|
|
|
3071 }
|
|
|
3072 }
|
|
|
3073
|
|
|
3074 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
3075 Return t if function in which this appears was called interactively.
|
|
|
3076 This means that the function was called with call-interactively (which
|
|
|
3077 includes being called as the binding of a key)
|
|
|
3078 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
3079 */
|
|
|
3080 ())
|
|
|
3081 {
|
|
|
3082 REGISTER struct backtrace *btp;
|
|
|
3083 REGISTER Lisp_Object fun;
|
|
|
3084
|
|
|
3085 if (!INTERACTIVE)
|
|
|
3086 return Qnil;
|
|
|
3087
|
|
|
3088 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
3089 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
3090 function). Note that *btp->function may be a symbol pointing at a
|
|
|
3091 compiled function. */
|
|
|
3092 btp = backtrace_list;
|
|
|
3093
|
|
|
3094 #if 0 /* FSFmacs */
|
|
|
3095
|
|
|
3096 /* #### FSFmacs does the following instead. I can't figure
|
|
|
3097 out which one is more correct. */
|
|
|
3098 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
3099 the top for Finteractive_p itself. If so, skip it. */
|
|
|
3100 fun = Findirect_function (*btp->function);
|
|
|
3101 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
3102 btp = btp->next;
|
|
|
3103
|
|
|
3104 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
3105 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
3106 definition, this function isn't really being called
|
|
|
3107 interactively, but because that's the way Emacs 18 always builds
|
|
|
3108 byte-compiled functions, we'll accept it for now. */
|
|
|
3109 if (EQ (*btp->function, Qbyte_code))
|
|
|
3110 btp = btp->next;
|
|
|
3111
|
|
|
3112 /* If this isn't a byte-compiled function, then we may now be
|
|
|
3113 looking at several frames for special forms. Skip past them. */
|
|
|
3114 while (btp &&
|
|
|
3115 btp->nargs == UNEVALLED)
|
|
|
3116 btp = btp->next;
|
|
|
3117
|
|
|
3118 #else
|
|
|
3119
|
|
|
3120 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
3121 btp = btp->next;
|
|
|
3122 for (;
|
|
|
3123 btp && (btp->nargs == UNEVALLED
|
|
|
3124 || EQ (*btp->function, Qbyte_code));
|
|
|
3125 btp = btp->next)
|
|
|
3126 {}
|
|
|
3127 /* btp now points at the frame of the innermost function
|
|
|
3128 that DOES eval its args.
|
|
|
3129 If it is a built-in function (such as load or eval-region)
|
|
|
3130 return nil. */
|
|
|
3131 /* Beats me why this is necessary, but it is */
|
|
|
3132 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
3133 return Qt;
|
|
|
3134
|
|
|
3135 #endif
|
|
|
3136
|
|
|
3137 fun = Findirect_function (*btp->function);
|
|
|
3138 if (SUBRP (fun))
|
|
|
3139 return Qnil;
|
|
|
3140 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
3141 Return t if that function was called interactively. */
|
|
|
3142 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
3143 return Qt;
|
|
|
3144 return Qnil;
|
|
|
3145 }
|
|
|
3146
|
|
|
3147
|
|
|
3148 /************************************************************************/
|
|
|
3149 /* Autoloading */
|
|
|
3150 /************************************************************************/
|
|
|
3151
|
|
|
3152 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
444
|
3153 Define FUNCTION to autoload from FILENAME.
|
|
|
3154 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'.
|
|
|
3155 The remaining optional arguments provide additional info about the
|
|
|
3156 real definition.
|
|
|
3157 DOCSTRING is documentation for FUNCTION.
|
|
|
3158 INTERACTIVE, if non-nil, says FUNCTION can be called interactively.
|
|
|
3159 TYPE indicates the type of the object:
|
|
428
|
3160 nil or omitted says FUNCTION is a function,
|
|
|
3161 `keymap' says FUNCTION is really a keymap, and
|
|
|
3162 `macro' or t says FUNCTION is really a macro.
|
|
444
|
3163 If FUNCTION already has a non-void function definition that is not an
|
|
|
3164 autoload object, this function does nothing and returns nil.
|
|
428
|
3165 */
|
|
444
|
3166 (function, filename, docstring, interactive, type))
|
|
428
|
3167 {
|
|
|
3168 /* This function can GC */
|
|
|
3169 CHECK_SYMBOL (function);
|
|
444
|
3170 CHECK_STRING (filename);
|
|
428
|
3171
|
|
|
3172 /* If function is defined and not as an autoload, don't override */
|
|
|
3173 {
|
|
|
3174 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
3175 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
3176 return Qnil;
|
|
|
3177 }
|
|
|
3178
|
|
|
3179 if (purify_flag)
|
|
|
3180 {
|
|
|
3181 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
444
|
3182 filename = Fsymbol_name (Fintern (filename, Qnil));
|
|
428
|
3183 }
|
|
440
|
3184
|
|
444
|
3185 return Ffset (function, Fcons (Qautoload, list4 (filename,
|
|
428
|
3186 docstring,
|
|
|
3187 interactive,
|
|
|
3188 type)));
|
|
|
3189 }
|
|
|
3190
|
|
|
3191 Lisp_Object
|
|
|
3192 un_autoload (Lisp_Object oldqueue)
|
|
|
3193 {
|
|
|
3194 /* This function can GC */
|
|
|
3195 REGISTER Lisp_Object queue, first, second;
|
|
|
3196
|
|
|
3197 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
3198 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
3199 queue = Vautoload_queue;
|
|
|
3200 Vautoload_queue = oldqueue;
|
|
|
3201 while (CONSP (queue))
|
|
|
3202 {
|
|
|
3203 first = XCAR (queue);
|
|
|
3204 second = Fcdr (first);
|
|
|
3205 first = Fcar (first);
|
|
|
3206 if (NILP (second))
|
|
|
3207 Vfeatures = first;
|
|
|
3208 else
|
|
|
3209 Ffset (first, second);
|
|
|
3210 queue = Fcdr (queue);
|
|
|
3211 }
|
|
|
3212 return Qnil;
|
|
|
3213 }
|
|
|
3214
|
|
|
3215 void
|
|
|
3216 do_autoload (Lisp_Object fundef,
|
|
|
3217 Lisp_Object funname)
|
|
|
3218 {
|
|
|
3219 /* This function can GC */
|
|
|
3220 int speccount = specpdl_depth();
|
|
|
3221 Lisp_Object fun = funname;
|
|
|
3222 struct gcpro gcpro1, gcpro2;
|
|
|
3223
|
|
|
3224 CHECK_SYMBOL (funname);
|
|
|
3225 GCPRO2 (fun, funname);
|
|
|
3226
|
|
|
3227 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
3228 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
3229 Vautoload_queue = Qt;
|
|
|
3230 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
3231
|
|
|
3232 {
|
|
|
3233 Lisp_Object queue;
|
|
|
3234
|
|
|
3235 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
3236 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
3237 {
|
|
|
3238 Lisp_Object first = XCAR (queue);
|
|
|
3239 Lisp_Object second = Fcdr (first);
|
|
|
3240
|
|
|
3241 first = Fcar (first);
|
|
|
3242
|
|
|
3243 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
3244 may be an atom if the autoload entry was generated by a defalias
|
|
|
3245 or fset. */
|
|
|
3246 if (CONSP (second))
|
|
|
3247 Fput (first, Qautoload, (XCDR (second)));
|
|
|
3248 }
|
|
|
3249 }
|
|
|
3250
|
|
|
3251 /* Once loading finishes, don't undo it. */
|
|
|
3252 Vautoload_queue = Qt;
|
|
771
|
3253 unbind_to (speccount);
|
|
428
|
3254
|
|
|
3255 fun = indirect_function (fun, 0);
|
|
|
3256
|
|
|
3257 #if 0 /* FSFmacs */
|
|
|
3258 if (!NILP (Fequal (fun, fundef)))
|
|
|
3259 #else
|
|
|
3260 if (UNBOUNDP (fun)
|
|
|
3261 || (CONSP (fun)
|
|
|
3262 && EQ (XCAR (fun), Qautoload)))
|
|
|
3263 #endif
|
|
563
|
3264 invalid_state ("Autoloading failed to define function", funname);
|
|
428
|
3265 UNGCPRO;
|
|
|
3266 }
|
|
|
3267
|
|
|
3268
|
|
|
3269 /************************************************************************/
|
|
|
3270 /* eval, funcall, apply */
|
|
|
3271 /************************************************************************/
|
|
|
3272
|
|
814
|
3273 /* NOTE: If you are hearing the endless complaint that function calls in
|
|
|
3274 elisp are extremely slow, it just isn't true any more! The stuff below
|
|
|
3275 -- in particular, the calling of subrs and compiled functions, the most
|
|
|
3276 common cases -- has been highly optimized. There isn't a whole lot left
|
|
|
3277 to do to squeeze more speed out except by switching to lexical
|
|
|
3278 variables, which would eliminate the specbind loop. (But the real gain
|
|
|
3279 from lexical variables would come from better optimization -- with
|
|
|
3280 dynamic binding, you have the constant problem that any function call
|
|
|
3281 that you haven't explicitly proven to be side-effect-free might
|
|
|
3282 potentially side effect your local variables, which makes optimization
|
|
|
3283 extremely difficult when there are function calls anywhere in a chunk of
|
|
|
3284 code to be optimized. Even worse, you don't know that *your* local
|
|
|
3285 variables aren't side-effecting an outer function's local variables, so
|
|
|
3286 it's impossible to optimize away almost *any* variable assignment.) */
|
|
|
3287
|
|
428
|
3288 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
442
|
3289 int nargs, Lisp_Object args[]);
|
|
428
|
3290 static int in_warnings;
|
|
|
3291
|
|
|
3292
|
|
814
|
3293 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f,
|
|
|
3294 int nargs,
|
|
|
3295 Lisp_Object args[]);
|
|
|
3296
|
|
|
3297 /* The theory behind making this a separate function is to shrink
|
|
|
3298 funcall_compiled_function() so as to increase the likelihood of a cache
|
|
|
3299 hit in the L1 cache -- &rest processing is not going to be fast anyway.
|
|
|
3300 The idea is the same as with execute_rare_opcode() in bytecode.c. We
|
|
|
3301 make this non-static to ensure the compiler doesn't inline it. */
|
|
|
3302
|
|
|
3303 void
|
|
|
3304 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs,
|
|
|
3305 Lisp_Object args[])
|
|
|
3306 {
|
|
|
3307 REGISTER int i = 0;
|
|
|
3308 int max_non_rest_args = f->args_in_array - 1;
|
|
|
3309 int bindargs = min (nargs, max_non_rest_args);
|
|
|
3310
|
|
|
3311 for (i = 0; i < bindargs; i++)
|
|
|
3312 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3313 for (i = bindargs; i < max_non_rest_args; i++)
|
|
|
3314 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
|
3315 SPECBIND_FAST_UNSAFE
|
|
|
3316 (f->args[max_non_rest_args],
|
|
|
3317 nargs > max_non_rest_args ?
|
|
|
3318 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) :
|
|
|
3319 Qnil);
|
|
|
3320 }
|
|
|
3321
|
|
|
3322 /* Apply compiled-function object FUN to the NARGS evaluated arguments
|
|
|
3323 in ARGS, and return the result of evaluation. */
|
|
|
3324 inline static Lisp_Object
|
|
|
3325 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3326 {
|
|
|
3327 /* This function can GC */
|
|
|
3328 int speccount = specpdl_depth();
|
|
|
3329 REGISTER int i = 0;
|
|
|
3330 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun);
|
|
|
3331
|
|
|
3332 if (!OPAQUEP (f->instructions))
|
|
|
3333 /* Lazily munge the instructions into a more efficient form */
|
|
|
3334 optimize_compiled_function (fun);
|
|
|
3335
|
|
|
3336 /* optimize_compiled_function() guaranteed that f->specpdl_depth is
|
|
|
3337 the required space on the specbinding stack for binding the args
|
|
|
3338 and local variables of fun. So just reserve it once. */
|
|
|
3339 SPECPDL_RESERVE (f->specpdl_depth);
|
|
|
3340
|
|
|
3341 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified
|
|
|
3342 optional arguments. */
|
|
|
3343 {
|
|
|
3344 #if 1
|
|
|
3345 for (i = 0; i < nargs; i++)
|
|
|
3346 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3347 #else
|
|
|
3348 /* Here's an alternate way to write the loop that tries to further
|
|
|
3349 optimize funcalls for functions with few arguments by partially
|
|
|
3350 unrolling the loop. It's not clear whether this is a win since it
|
|
|
3351 increases the size of the function and the possibility of L1 cache
|
|
|
3352 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes
|
|
|
3353 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte
|
|
|
3354 compiler repeatedly and looking at the total time, show very
|
|
|
3355 little difference between the simple loop above, the unrolled code
|
|
|
3356 below, and a "partly unrolled" solution with only cases 0-2 below
|
|
|
3357 instead of 0-4. Therefore, I'm keeping it at the simple loop
|
|
|
3358 because it's smaller. */
|
|
|
3359 switch (nargs)
|
|
|
3360 {
|
|
|
3361 default:
|
|
|
3362 for (i = nargs - 1; i >= 4; i--)
|
|
|
3363 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3364 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]);
|
|
|
3365 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]);
|
|
|
3366 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]);
|
|
|
3367 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]);
|
|
|
3368 case 0: break;
|
|
|
3369 }
|
|
|
3370 #endif
|
|
|
3371 }
|
|
|
3372 else if (nargs < f->min_args)
|
|
|
3373 goto wrong_number_of_arguments;
|
|
|
3374 else if (nargs < f->max_args)
|
|
|
3375 {
|
|
|
3376 for (i = 0; i < nargs; i++)
|
|
|
3377 SPECBIND_FAST_UNSAFE (f->args[i], args[i]);
|
|
|
3378 for (i = nargs; i < f->max_args; i++)
|
|
|
3379 SPECBIND_FAST_UNSAFE (f->args[i], Qnil);
|
|
|
3380 }
|
|
|
3381 else if (f->max_args == MANY)
|
|
|
3382 handle_compiled_function_with_and_rest (f, nargs, args);
|
|
|
3383 else
|
|
|
3384 {
|
|
|
3385 wrong_number_of_arguments:
|
|
|
3386 /* The actual printed compiled_function object is incomprehensible.
|
|
|
3387 Check the backtrace to see if we can get a more meaningful symbol. */
|
|
|
3388 if (EQ (fun, indirect_function (*backtrace_list->function, 0)))
|
|
|
3389 fun = *backtrace_list->function;
|
|
|
3390 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3391 list2 (fun, make_int (nargs)));
|
|
|
3392 }
|
|
|
3393
|
|
|
3394 {
|
|
|
3395 Lisp_Object value =
|
|
|
3396 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions),
|
|
|
3397 f->stack_depth,
|
|
|
3398 XVECTOR_DATA (f->constants));
|
|
|
3399
|
|
|
3400 /* The attempt to optimize this by only unbinding variables failed
|
|
|
3401 because using buffer-local variables as function parameters
|
|
|
3402 leads to specpdl_ptr->func != 0 */
|
|
|
3403 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */
|
|
|
3404 UNBIND_TO_GCPRO (speccount, value);
|
|
|
3405 return value;
|
|
|
3406 }
|
|
|
3407 }
|
|
|
3408
|
|
428
|
3409 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
3410 Evaluate FORM and return its value.
|
|
|
3411 */
|
|
|
3412 (form))
|
|
|
3413 {
|
|
|
3414 /* This function can GC */
|
|
|
3415 Lisp_Object fun, val, original_fun, original_args;
|
|
|
3416 int nargs;
|
|
|
3417 struct backtrace backtrace;
|
|
|
3418
|
|
|
3419 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
853
|
3420 while (!in_warnings && !NILP (Vpending_warnings)
|
|
|
3421 /* well, perhaps not so safe after all! */
|
|
|
3422 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY))
|
|
428
|
3423 {
|
|
|
3424 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
3425 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
853
|
3426 int speccount = internal_bind_int (&in_warnings, 1);
|
|
|
3427
|
|
428
|
3428 this_warning_cons = Vpending_warnings;
|
|
|
3429 this_warning = XCAR (this_warning_cons);
|
|
|
3430 /* in case an error occurs in the warn function, at least
|
|
|
3431 it won't happen infinitely */
|
|
|
3432 Vpending_warnings = XCDR (Vpending_warnings);
|
|
853
|
3433 free_cons (this_warning_cons);
|
|
428
|
3434 class = XCAR (this_warning);
|
|
|
3435 level = XCAR (XCDR (this_warning));
|
|
|
3436 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
3437 free_list (this_warning);
|
|
|
3438
|
|
|
3439 if (NILP (Vpending_warnings))
|
|
|
3440 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
3441 but safer */
|
|
|
3442
|
|
|
3443 GCPRO4 (form, class, level, messij);
|
|
|
3444 if (!STRINGP (messij))
|
|
|
3445 messij = Fprin1_to_string (messij, Qnil);
|
|
|
3446 call3 (Qdisplay_warning, class, messij, level);
|
|
|
3447 UNGCPRO;
|
|
771
|
3448 unbind_to (speccount);
|
|
428
|
3449 }
|
|
|
3450
|
|
|
3451 if (!CONSP (form))
|
|
|
3452 {
|
|
|
3453 if (SYMBOLP (form))
|
|
|
3454 return Fsymbol_value (form);
|
|
|
3455 else
|
|
|
3456 return form;
|
|
|
3457 }
|
|
|
3458
|
|
|
3459 QUIT;
|
|
814
|
3460 if (need_to_garbage_collect)
|
|
428
|
3461 {
|
|
|
3462 struct gcpro gcpro1;
|
|
|
3463 GCPRO1 (form);
|
|
|
3464 garbage_collect_1 ();
|
|
|
3465 UNGCPRO;
|
|
|
3466 }
|
|
|
3467
|
|
|
3468 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3469 {
|
|
|
3470 if (max_lisp_eval_depth < 100)
|
|
|
3471 max_lisp_eval_depth = 100;
|
|
|
3472 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3473 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3474 Qunbound);
|
|
428
|
3475 }
|
|
|
3476
|
|
|
3477 /* We guaranteed CONSP (form) above */
|
|
|
3478 original_fun = XCAR (form);
|
|
|
3479 original_args = XCDR (form);
|
|
|
3480
|
|
|
3481 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
3482
|
|
|
3483 backtrace.pdlcount = specpdl_depth();
|
|
|
3484 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3485 backtrace.args = &original_args;
|
|
|
3486 backtrace.nargs = UNEVALLED;
|
|
|
3487 backtrace.evalargs = 1;
|
|
|
3488 backtrace.debug_on_exit = 0;
|
|
|
3489 PUSH_BACKTRACE (backtrace);
|
|
|
3490
|
|
|
3491 if (debug_on_next_call)
|
|
|
3492 do_debug_on_call (Qt);
|
|
|
3493
|
|
|
3494 if (profiling_active)
|
|
|
3495 profile_increase_call_count (original_fun);
|
|
|
3496
|
|
|
3497 /* At this point, only original_fun and original_args
|
|
|
3498 have values that will be used below. */
|
|
|
3499 retry:
|
|
|
3500 fun = indirect_function (original_fun, 1);
|
|
|
3501
|
|
|
3502 if (SUBRP (fun))
|
|
|
3503 {
|
|
|
3504 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3505 int max_args = subr->max_args;
|
|
|
3506
|
|
|
3507 if (nargs < subr->min_args)
|
|
|
3508 goto wrong_number_of_arguments;
|
|
|
3509
|
|
|
3510 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
3511 {
|
|
|
3512 backtrace.evalargs = 0;
|
|
|
3513 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
3514 (original_args));
|
|
|
3515 }
|
|
|
3516 else if (nargs <= max_args)
|
|
|
3517 {
|
|
|
3518 struct gcpro gcpro1;
|
|
|
3519 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
3520 REGISTER Lisp_Object *p = args;
|
|
|
3521
|
|
|
3522 GCPRO1 (args[0]);
|
|
|
3523 gcpro1.nvars = 0;
|
|
|
3524
|
|
|
3525 {
|
|
|
3526 LIST_LOOP_2 (arg, original_args)
|
|
|
3527 {
|
|
|
3528 *p++ = Feval (arg);
|
|
|
3529 gcpro1.nvars++;
|
|
|
3530 }
|
|
|
3531 }
|
|
|
3532
|
|
|
3533 /* &optional args default to nil. */
|
|
|
3534 while (p - args < max_args)
|
|
|
3535 *p++ = Qnil;
|
|
|
3536
|
|
|
3537 backtrace.args = args;
|
|
|
3538 backtrace.nargs = nargs;
|
|
|
3539
|
|
|
3540 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3541
|
|
|
3542 UNGCPRO;
|
|
|
3543 }
|
|
|
3544 else if (max_args == MANY)
|
|
|
3545 {
|
|
|
3546 /* Pass a vector of evaluated arguments */
|
|
|
3547 struct gcpro gcpro1;
|
|
|
3548 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3549 REGISTER Lisp_Object *p = args;
|
|
|
3550
|
|
|
3551 GCPRO1 (args[0]);
|
|
|
3552 gcpro1.nvars = 0;
|
|
|
3553
|
|
|
3554 {
|
|
|
3555 LIST_LOOP_2 (arg, original_args)
|
|
|
3556 {
|
|
|
3557 *p++ = Feval (arg);
|
|
|
3558 gcpro1.nvars++;
|
|
|
3559 }
|
|
|
3560 }
|
|
|
3561
|
|
|
3562 backtrace.args = args;
|
|
|
3563 backtrace.nargs = nargs;
|
|
|
3564
|
|
|
3565 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3566 (nargs, args));
|
|
|
3567
|
|
|
3568 UNGCPRO;
|
|
|
3569 }
|
|
|
3570 else
|
|
|
3571 {
|
|
|
3572 wrong_number_of_arguments:
|
|
440
|
3573 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
428
|
3574 }
|
|
|
3575 }
|
|
|
3576 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3577 {
|
|
|
3578 struct gcpro gcpro1;
|
|
|
3579 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3580 REGISTER Lisp_Object *p = args;
|
|
|
3581
|
|
|
3582 GCPRO1 (args[0]);
|
|
|
3583 gcpro1.nvars = 0;
|
|
|
3584
|
|
|
3585 {
|
|
|
3586 LIST_LOOP_2 (arg, original_args)
|
|
|
3587 {
|
|
|
3588 *p++ = Feval (arg);
|
|
|
3589 gcpro1.nvars++;
|
|
|
3590 }
|
|
|
3591 }
|
|
|
3592
|
|
|
3593 backtrace.args = args;
|
|
|
3594 backtrace.nargs = nargs;
|
|
|
3595 backtrace.evalargs = 0;
|
|
|
3596
|
|
|
3597 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3598
|
|
|
3599 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3600 if (backtrace.debug_on_exit)
|
|
|
3601 val = do_debug_on_exit (val);
|
|
|
3602 /* Don't do it again when we return to eval. */
|
|
|
3603 backtrace.debug_on_exit = 0;
|
|
|
3604
|
|
|
3605 UNGCPRO;
|
|
|
3606 }
|
|
|
3607 else if (CONSP (fun))
|
|
|
3608 {
|
|
|
3609 Lisp_Object funcar = XCAR (fun);
|
|
|
3610
|
|
|
3611 if (EQ (funcar, Qautoload))
|
|
|
3612 {
|
|
|
3613 do_autoload (fun, original_fun);
|
|
|
3614 goto retry;
|
|
|
3615 }
|
|
|
3616 else if (EQ (funcar, Qmacro))
|
|
|
3617 {
|
|
|
3618 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3619 }
|
|
|
3620 else if (EQ (funcar, Qlambda))
|
|
|
3621 {
|
|
|
3622 struct gcpro gcpro1;
|
|
|
3623 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3624 REGISTER Lisp_Object *p = args;
|
|
|
3625
|
|
|
3626 GCPRO1 (args[0]);
|
|
|
3627 gcpro1.nvars = 0;
|
|
|
3628
|
|
|
3629 {
|
|
|
3630 LIST_LOOP_2 (arg, original_args)
|
|
|
3631 {
|
|
|
3632 *p++ = Feval (arg);
|
|
|
3633 gcpro1.nvars++;
|
|
|
3634 }
|
|
|
3635 }
|
|
|
3636
|
|
|
3637 UNGCPRO;
|
|
|
3638
|
|
|
3639 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3640 backtrace.nargs = nargs;
|
|
|
3641 backtrace.evalargs = 0;
|
|
|
3642
|
|
|
3643 val = funcall_lambda (fun, nargs, args);
|
|
|
3644
|
|
|
3645 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3646 if (backtrace.debug_on_exit)
|
|
|
3647 val = do_debug_on_exit (val);
|
|
|
3648 /* Don't do it again when we return to eval. */
|
|
|
3649 backtrace.debug_on_exit = 0;
|
|
|
3650 }
|
|
|
3651 else
|
|
|
3652 {
|
|
|
3653 goto invalid_function;
|
|
|
3654 }
|
|
|
3655 }
|
|
|
3656 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3657 {
|
|
|
3658 invalid_function:
|
|
436
|
3659 val = signal_invalid_function_error (fun);
|
|
428
|
3660 }
|
|
|
3661
|
|
|
3662 lisp_eval_depth--;
|
|
|
3663 if (backtrace.debug_on_exit)
|
|
|
3664 val = do_debug_on_exit (val);
|
|
|
3665 POP_BACKTRACE (backtrace);
|
|
|
3666 return val;
|
|
|
3667 }
|
|
|
3668
|
|
|
3669
|
|
|
3670 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3671 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3672 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3673 */
|
|
|
3674 (int nargs, Lisp_Object *args))
|
|
|
3675 {
|
|
|
3676 /* This function can GC */
|
|
|
3677 Lisp_Object fun;
|
|
|
3678 Lisp_Object val;
|
|
|
3679 struct backtrace backtrace;
|
|
|
3680 int fun_nargs = nargs - 1;
|
|
|
3681 Lisp_Object *fun_args = args + 1;
|
|
|
3682
|
|
|
3683 QUIT;
|
|
851
|
3684
|
|
|
3685 if (funcall_allocation_flag)
|
|
|
3686 {
|
|
|
3687 if (need_to_garbage_collect)
|
|
|
3688 /* Callers should gcpro lexpr args */
|
|
|
3689 garbage_collect_1 ();
|
|
|
3690 if (need_to_check_c_alloca)
|
|
|
3691 {
|
|
|
3692 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP)
|
|
|
3693 {
|
|
|
3694 xemacs_c_alloca (0);
|
|
|
3695 funcall_alloca_count = 0;
|
|
|
3696 }
|
|
|
3697 }
|
|
887
|
3698 if (need_to_signal_post_gc)
|
|
|
3699 {
|
|
|
3700 static void run_post_gc_hook(void); /* forward */
|
|
|
3701
|
|
|
3702 need_to_signal_post_gc = 0;
|
|
|
3703 recompute_funcall_allocation_flag();
|
|
|
3704 run_post_gc_hook();
|
|
|
3705 }
|
|
851
|
3706 }
|
|
428
|
3707
|
|
|
3708 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3709 {
|
|
|
3710 if (max_lisp_eval_depth < 100)
|
|
|
3711 max_lisp_eval_depth = 100;
|
|
|
3712 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3713 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3714 Qunbound);
|
|
428
|
3715 }
|
|
|
3716
|
|
|
3717 backtrace.pdlcount = specpdl_depth();
|
|
|
3718 backtrace.function = &args[0];
|
|
|
3719 backtrace.args = fun_args;
|
|
|
3720 backtrace.nargs = fun_nargs;
|
|
|
3721 backtrace.evalargs = 0;
|
|
|
3722 backtrace.debug_on_exit = 0;
|
|
|
3723 PUSH_BACKTRACE (backtrace);
|
|
|
3724
|
|
|
3725 if (debug_on_next_call)
|
|
|
3726 do_debug_on_call (Qlambda);
|
|
|
3727
|
|
|
3728 retry:
|
|
|
3729
|
|
|
3730 fun = args[0];
|
|
|
3731
|
|
|
3732 /* It might be useful to place this *after* all the checks. */
|
|
|
3733 if (profiling_active)
|
|
|
3734 profile_increase_call_count (fun);
|
|
|
3735
|
|
|
3736 /* We could call indirect_function directly, but profiling shows
|
|
|
3737 this is worth optimizing by partially unrolling the loop. */
|
|
|
3738 if (SYMBOLP (fun))
|
|
|
3739 {
|
|
|
3740 fun = XSYMBOL (fun)->function;
|
|
|
3741 if (SYMBOLP (fun))
|
|
|
3742 {
|
|
|
3743 fun = XSYMBOL (fun)->function;
|
|
|
3744 if (SYMBOLP (fun))
|
|
|
3745 fun = indirect_function (fun, 1);
|
|
|
3746 }
|
|
|
3747 }
|
|
|
3748
|
|
|
3749 if (SUBRP (fun))
|
|
|
3750 {
|
|
|
3751 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3752 int max_args = subr->max_args;
|
|
|
3753 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3754
|
|
|
3755 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3756 {
|
|
|
3757 funcall_subr:
|
|
|
3758 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
|
3759 }
|
|
436
|
3760 else if (fun_nargs < subr->min_args)
|
|
|
3761 {
|
|
|
3762 goto wrong_number_of_arguments;
|
|
|
3763 }
|
|
428
|
3764 else if (fun_nargs < max_args)
|
|
|
3765 {
|
|
|
3766 Lisp_Object *p = spacious_args;
|
|
|
3767
|
|
|
3768 /* Default optionals to nil */
|
|
|
3769 while (fun_nargs--)
|
|
|
3770 *p++ = *fun_args++;
|
|
|
3771 while (p - spacious_args < max_args)
|
|
|
3772 *p++ = Qnil;
|
|
|
3773
|
|
|
3774 fun_args = spacious_args;
|
|
|
3775 goto funcall_subr;
|
|
|
3776 }
|
|
|
3777 else if (max_args == MANY)
|
|
|
3778 {
|
|
436
|
3779 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
428
|
3780 }
|
|
|
3781 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3782 {
|
|
|
3783 goto invalid_function;
|
|
|
3784 }
|
|
|
3785 else
|
|
|
3786 {
|
|
|
3787 wrong_number_of_arguments:
|
|
436
|
3788 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3789 }
|
|
|
3790 }
|
|
|
3791 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3792 {
|
|
|
3793 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
|
3794 }
|
|
|
3795 else if (CONSP (fun))
|
|
|
3796 {
|
|
|
3797 Lisp_Object funcar = XCAR (fun);
|
|
|
3798
|
|
|
3799 if (EQ (funcar, Qlambda))
|
|
|
3800 {
|
|
|
3801 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3802 }
|
|
|
3803 else if (EQ (funcar, Qautoload))
|
|
|
3804 {
|
|
|
3805 do_autoload (fun, args[0]);
|
|
|
3806 goto retry;
|
|
|
3807 }
|
|
|
3808 else /* Can't funcall a macro */
|
|
|
3809 {
|
|
|
3810 goto invalid_function;
|
|
|
3811 }
|
|
|
3812 }
|
|
|
3813 else if (UNBOUNDP (fun))
|
|
|
3814 {
|
|
436
|
3815 val = signal_void_function_error (args[0]);
|
|
428
|
3816 }
|
|
|
3817 else
|
|
|
3818 {
|
|
|
3819 invalid_function:
|
|
436
|
3820 val = signal_invalid_function_error (fun);
|
|
428
|
3821 }
|
|
|
3822
|
|
|
3823 lisp_eval_depth--;
|
|
|
3824 if (backtrace.debug_on_exit)
|
|
|
3825 val = do_debug_on_exit (val);
|
|
|
3826 POP_BACKTRACE (backtrace);
|
|
|
3827 return val;
|
|
|
3828 }
|
|
|
3829
|
|
|
3830 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3831 Return t if OBJECT can be called as a function, else nil.
|
|
|
3832 A function is an object that can be applied to arguments,
|
|
|
3833 using for example `funcall' or `apply'.
|
|
|
3834 */
|
|
|
3835 (object))
|
|
|
3836 {
|
|
|
3837 if (SYMBOLP (object))
|
|
|
3838 object = indirect_function (object, 0);
|
|
|
3839
|
|
919
|
3840 if (COMPILED_FUNCTIONP (object) || SUBRP (object))
|
|
|
3841 return Qt;
|
|
|
3842 if (CONSP (object))
|
|
|
3843 {
|
|
|
3844 Lisp_Object car = XCAR (object);
|
|
|
3845 if (EQ (car, Qlambda))
|
|
|
3846 return Qt;
|
|
|
3847 if (EQ (car, Qautoload)
|
|
|
3848 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object)))))))
|
|
|
3849 return Qt;
|
|
|
3850 }
|
|
|
3851 return Qnil;
|
|
428
|
3852 }
|
|
|
3853
|
|
|
3854 static Lisp_Object
|
|
|
3855 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
3856 {
|
|
|
3857 Lisp_Object orig_function = function;
|
|
|
3858 Lisp_Object arglist;
|
|
|
3859
|
|
|
3860 retry:
|
|
|
3861
|
|
|
3862 if (SYMBOLP (function))
|
|
|
3863 function = indirect_function (function, 1);
|
|
|
3864
|
|
|
3865 if (SUBRP (function))
|
|
|
3866 {
|
|
442
|
3867 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
3868 if (function_min_args_p)
|
|
|
3869 return Fsubr_min_args (function);
|
|
|
3870 else
|
|
|
3871 return Fsubr_max_args (function);
|
|
428
|
3872 }
|
|
|
3873 else if (COMPILED_FUNCTIONP (function))
|
|
|
3874 {
|
|
814
|
3875 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function);
|
|
|
3876
|
|
|
3877 if (function_min_args_p)
|
|
|
3878 return make_int (f->min_args);
|
|
|
3879 else if (f->max_args == MANY)
|
|
|
3880 return Qnil;
|
|
|
3881 else
|
|
|
3882 return make_int (f->max_args);
|
|
428
|
3883 }
|
|
|
3884 else if (CONSP (function))
|
|
|
3885 {
|
|
|
3886 Lisp_Object funcar = XCAR (function);
|
|
|
3887
|
|
|
3888 if (EQ (funcar, Qmacro))
|
|
|
3889 {
|
|
|
3890 function = XCDR (function);
|
|
|
3891 goto retry;
|
|
|
3892 }
|
|
|
3893 else if (EQ (funcar, Qautoload))
|
|
|
3894 {
|
|
442
|
3895 struct gcpro gcpro1;
|
|
|
3896
|
|
|
3897 GCPRO1 (function);
|
|
428
|
3898 do_autoload (function, orig_function);
|
|
442
|
3899 UNGCPRO;
|
|
|
3900 function = orig_function;
|
|
428
|
3901 goto retry;
|
|
|
3902 }
|
|
|
3903 else if (EQ (funcar, Qlambda))
|
|
|
3904 {
|
|
|
3905 arglist = Fcar (XCDR (function));
|
|
|
3906 }
|
|
|
3907 else
|
|
|
3908 {
|
|
|
3909 goto invalid_function;
|
|
|
3910 }
|
|
|
3911 }
|
|
|
3912 else
|
|
|
3913 {
|
|
|
3914 invalid_function:
|
|
442
|
3915 return signal_invalid_function_error (orig_function);
|
|
428
|
3916 }
|
|
|
3917
|
|
|
3918 {
|
|
|
3919 int argcount = 0;
|
|
|
3920
|
|
|
3921 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3922 {
|
|
|
3923 if (EQ (arg, Qand_optional))
|
|
|
3924 {
|
|
|
3925 if (function_min_args_p)
|
|
|
3926 break;
|
|
|
3927 }
|
|
|
3928 else if (EQ (arg, Qand_rest))
|
|
|
3929 {
|
|
|
3930 if (function_min_args_p)
|
|
|
3931 break;
|
|
|
3932 else
|
|
|
3933 return Qnil;
|
|
|
3934 }
|
|
|
3935 else
|
|
|
3936 {
|
|
|
3937 argcount++;
|
|
|
3938 }
|
|
|
3939 }
|
|
|
3940
|
|
|
3941 return make_int (argcount);
|
|
|
3942 }
|
|
|
3943 }
|
|
|
3944
|
|
|
3945 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
617
|
3946 Return the minimum number of arguments a function may be called with.
|
|
428
|
3947 The function may be any form that can be passed to `funcall',
|
|
|
3948 any special form, or any macro.
|
|
853
|
3949
|
|
|
3950 To check if a function can be called with a specified number of
|
|
|
3951 arguments, use `function-allows-args'.
|
|
428
|
3952 */
|
|
|
3953 (function))
|
|
|
3954 {
|
|
|
3955 return function_argcount (function, 1);
|
|
|
3956 }
|
|
|
3957
|
|
|
3958 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
617
|
3959 Return the maximum number of arguments a function may be called with.
|
|
428
|
3960 The function may be any form that can be passed to `funcall',
|
|
|
3961 any special form, or any macro.
|
|
|
3962 If the function takes an arbitrary number of arguments or is
|
|
|
3963 a built-in special form, nil is returned.
|
|
853
|
3964
|
|
|
3965 To check if a function can be called with a specified number of
|
|
|
3966 arguments, use `function-allows-args'.
|
|
428
|
3967 */
|
|
|
3968 (function))
|
|
|
3969 {
|
|
|
3970 return function_argcount (function, 0);
|
|
|
3971 }
|
|
|
3972
|
|
|
3973
|
|
|
3974 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
3975 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
3976 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
3977 */
|
|
|
3978 (int nargs, Lisp_Object *args))
|
|
|
3979 {
|
|
|
3980 /* This function can GC */
|
|
|
3981 Lisp_Object fun = args[0];
|
|
|
3982 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3983 int numargs;
|
|
|
3984 int funcall_nargs;
|
|
|
3985
|
|
|
3986 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
3987
|
|
|
3988 if (numargs == 0)
|
|
|
3989 /* (apply foo 0 1 '()) */
|
|
|
3990 return Ffuncall (nargs - 1, args);
|
|
|
3991 else if (numargs == 1)
|
|
|
3992 {
|
|
|
3993 /* (apply foo 0 1 '(2)) */
|
|
|
3994 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3995 return Ffuncall (nargs, args);
|
|
|
3996 }
|
|
|
3997
|
|
|
3998 /* -1 for function, -1 for spread arg */
|
|
|
3999 numargs = nargs - 2 + numargs;
|
|
|
4000 /* +1 for function */
|
|
|
4001 funcall_nargs = 1 + numargs;
|
|
|
4002
|
|
|
4003 if (SYMBOLP (fun))
|
|
|
4004 fun = indirect_function (fun, 0);
|
|
|
4005
|
|
|
4006 if (SUBRP (fun))
|
|
|
4007 {
|
|
|
4008 Lisp_Subr *subr = XSUBR (fun);
|
|
|
4009 int max_args = subr->max_args;
|
|
|
4010
|
|
|
4011 if (numargs < subr->min_args
|
|
|
4012 || (max_args >= 0 && max_args < numargs))
|
|
|
4013 {
|
|
|
4014 /* Let funcall get the error */
|
|
|
4015 }
|
|
|
4016 else if (max_args > numargs)
|
|
|
4017 {
|
|
|
4018 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
4019 by explicitly supplying nil's for optional values */
|
|
|
4020 funcall_nargs += (max_args - numargs);
|
|
|
4021 }
|
|
|
4022 }
|
|
|
4023 else if (UNBOUNDP (fun))
|
|
|
4024 {
|
|
|
4025 /* Let funcall get the error */
|
|
|
4026 fun = args[0];
|
|
|
4027 }
|
|
|
4028
|
|
|
4029 {
|
|
|
4030 REGISTER int i;
|
|
|
4031 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
4032 struct gcpro gcpro1;
|
|
|
4033
|
|
|
4034 GCPRO1 (*funcall_args);
|
|
|
4035 gcpro1.nvars = funcall_nargs;
|
|
|
4036
|
|
|
4037 /* Copy in the unspread args */
|
|
|
4038 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
4039 /* Spread the last arg we got. Its first element goes in
|
|
|
4040 the slot that it used to occupy, hence this value of I. */
|
|
|
4041 for (i = nargs - 1;
|
|
|
4042 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
4043 i++, spread_arg = XCDR (spread_arg))
|
|
|
4044 {
|
|
|
4045 funcall_args [i] = XCAR (spread_arg);
|
|
|
4046 }
|
|
|
4047 /* Supply nil for optional args (to subrs) */
|
|
|
4048 for (; i < funcall_nargs; i++)
|
|
|
4049 funcall_args[i] = Qnil;
|
|
|
4050
|
|
|
4051
|
|
|
4052 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
4053 }
|
|
|
4054 }
|
|
|
4055
|
|
|
4056
|
|
|
4057 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
4058 return the result of evaluation. */
|
|
|
4059
|
|
|
4060 static Lisp_Object
|
|
|
4061 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
4062 {
|
|
|
4063 /* This function can GC */
|
|
442
|
4064 Lisp_Object arglist, body, tail;
|
|
428
|
4065 int speccount = specpdl_depth();
|
|
|
4066 REGISTER int i = 0;
|
|
|
4067
|
|
|
4068 tail = XCDR (fun);
|
|
|
4069
|
|
|
4070 if (!CONSP (tail))
|
|
|
4071 goto invalid_function;
|
|
|
4072
|
|
|
4073 arglist = XCAR (tail);
|
|
|
4074 body = XCDR (tail);
|
|
|
4075
|
|
|
4076 {
|
|
|
4077 int optional = 0, rest = 0;
|
|
|
4078
|
|
442
|
4079 EXTERNAL_LIST_LOOP_2 (symbol, arglist)
|
|
428
|
4080 {
|
|
|
4081 if (!SYMBOLP (symbol))
|
|
|
4082 goto invalid_function;
|
|
|
4083 if (EQ (symbol, Qand_rest))
|
|
|
4084 rest = 1;
|
|
|
4085 else if (EQ (symbol, Qand_optional))
|
|
|
4086 optional = 1;
|
|
|
4087 else if (rest)
|
|
|
4088 {
|
|
|
4089 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
4090 i = nargs;
|
|
|
4091 }
|
|
|
4092 else if (i < nargs)
|
|
|
4093 specbind (symbol, args[i++]);
|
|
|
4094 else if (!optional)
|
|
|
4095 goto wrong_number_of_arguments;
|
|
|
4096 else
|
|
|
4097 specbind (symbol, Qnil);
|
|
|
4098 }
|
|
|
4099 }
|
|
|
4100
|
|
|
4101 if (i < nargs)
|
|
|
4102 goto wrong_number_of_arguments;
|
|
|
4103
|
|
771
|
4104 return unbind_to_1 (speccount, Fprogn (body));
|
|
428
|
4105
|
|
|
4106 wrong_number_of_arguments:
|
|
436
|
4107 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
4108
|
|
|
4109 invalid_function:
|
|
436
|
4110 return signal_invalid_function_error (fun);
|
|
428
|
4111 }
|
|
|
4112
|
|
|
4113
|
|
|
4114 /************************************************************************/
|
|
|
4115 /* Run hook variables in various ways. */
|
|
|
4116 /************************************************************************/
|
|
|
4117
|
|
|
4118 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
4119 Run each hook in HOOKS. Major mode functions use this.
|
|
|
4120 Each argument should be a symbol, a hook variable.
|
|
|
4121 These symbols are processed in the order specified.
|
|
|
4122 If a hook symbol has a non-nil value, that value may be a function
|
|
|
4123 or a list of functions to be called to run the hook.
|
|
|
4124 If the value is a function, it is called with no arguments.
|
|
|
4125 If it is a list, the elements are called, in order, with no arguments.
|
|
|
4126
|
|
|
4127 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4128 not `make-local-variable'.
|
|
|
4129 */
|
|
|
4130 (int nargs, Lisp_Object *args))
|
|
|
4131 {
|
|
|
4132 REGISTER int i;
|
|
|
4133
|
|
|
4134 for (i = 0; i < nargs; i++)
|
|
|
4135 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
4136
|
|
|
4137 return Qnil;
|
|
|
4138 }
|
|
|
4139
|
|
|
4140 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
4141 Run HOOK with the specified arguments ARGS.
|
|
|
4142 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
4143 value, that value may be a function or a list of functions to be
|
|
|
4144 called to run the hook. If the value is a function, it is called with
|
|
|
4145 the given arguments and its return value is returned. If it is a list
|
|
|
4146 of functions, those functions are called, in order,
|
|
|
4147 with the given arguments ARGS.
|
|
444
|
4148 It is best not to depend on the value returned by `run-hook-with-args',
|
|
428
|
4149 as that may change.
|
|
|
4150
|
|
|
4151 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4152 not `make-local-variable'.
|
|
|
4153 */
|
|
|
4154 (int nargs, Lisp_Object *args))
|
|
|
4155 {
|
|
|
4156 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4157 }
|
|
|
4158
|
|
|
4159 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
4160 Run HOOK with the specified arguments ARGS.
|
|
|
4161 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4162 be a list of functions. We call those functions, one by one,
|
|
|
4163 passing arguments ARGS to each of them, until one of them
|
|
|
4164 returns a non-nil value. Then we return that value.
|
|
|
4165 If all the functions return nil, we return nil.
|
|
|
4166
|
|
|
4167 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4168 not `make-local-variable'.
|
|
|
4169 */
|
|
|
4170 (int nargs, Lisp_Object *args))
|
|
|
4171 {
|
|
|
4172 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
4173 }
|
|
|
4174
|
|
|
4175 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
4176 Run HOOK with the specified arguments ARGS.
|
|
|
4177 HOOK should be a symbol, a hook variable. Its value should
|
|
|
4178 be a list of functions. We call those functions, one by one,
|
|
|
4179 passing arguments ARGS to each of them, until one of them
|
|
|
4180 returns nil. Then we return nil.
|
|
|
4181 If all the functions return non-nil, we return non-nil.
|
|
|
4182
|
|
|
4183 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
4184 not `make-local-variable'.
|
|
|
4185 */
|
|
|
4186 (int nargs, Lisp_Object *args))
|
|
|
4187 {
|
|
|
4188 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
4189 }
|
|
|
4190
|
|
|
4191 /* ARGS[0] should be a hook symbol.
|
|
|
4192 Call each of the functions in the hook value, passing each of them
|
|
|
4193 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
4194 COND specifies a condition to test after each call
|
|
|
4195 to decide whether to stop.
|
|
|
4196 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4197 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4198
|
|
|
4199 Lisp_Object
|
|
|
4200 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
4201 enum run_hooks_condition cond)
|
|
|
4202 {
|
|
|
4203 Lisp_Object sym, val, ret;
|
|
|
4204
|
|
|
4205 if (!initialized || preparing_for_armageddon)
|
|
|
4206 /* We need to bail out of here pronto. */
|
|
|
4207 return Qnil;
|
|
|
4208
|
|
|
4209 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
4210 will also be true unless something is really hosed. */
|
|
|
4211 assert (!gc_in_progress);
|
|
|
4212
|
|
|
4213 sym = args[0];
|
|
771
|
4214 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
428
|
4215 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
4216
|
|
|
4217 if (UNBOUNDP (val) || NILP (val))
|
|
|
4218 return ret;
|
|
|
4219 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
4220 {
|
|
|
4221 args[0] = val;
|
|
|
4222 return Ffuncall (nargs, args);
|
|
|
4223 }
|
|
|
4224 else
|
|
|
4225 {
|
|
|
4226 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4227 Lisp_Object globals = Qnil;
|
|
|
4228 GCPRO3 (sym, val, globals);
|
|
|
4229
|
|
|
4230 for (;
|
|
|
4231 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4232 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
4233 : !NILP (ret)));
|
|
|
4234 val = XCDR (val))
|
|
|
4235 {
|
|
|
4236 if (EQ (XCAR (val), Qt))
|
|
|
4237 {
|
|
|
4238 /* t indicates this hook has a local binding;
|
|
|
4239 it means to run the global binding too. */
|
|
|
4240 globals = Fdefault_value (sym);
|
|
|
4241
|
|
|
4242 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
4243 ! NILP (globals))
|
|
|
4244 {
|
|
|
4245 args[0] = globals;
|
|
|
4246 ret = Ffuncall (nargs, args);
|
|
|
4247 }
|
|
|
4248 else
|
|
|
4249 {
|
|
|
4250 for (;
|
|
|
4251 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4252 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
4253 ? NILP (ret)
|
|
|
4254 : !NILP (ret)));
|
|
|
4255 globals = XCDR (globals))
|
|
|
4256 {
|
|
|
4257 args[0] = XCAR (globals);
|
|
|
4258 /* In a global value, t should not occur. If it does, we
|
|
|
4259 must ignore it to avoid an endless loop. */
|
|
|
4260 if (!EQ (args[0], Qt))
|
|
|
4261 ret = Ffuncall (nargs, args);
|
|
|
4262 }
|
|
|
4263 }
|
|
|
4264 }
|
|
|
4265 else
|
|
|
4266 {
|
|
|
4267 args[0] = XCAR (val);
|
|
|
4268 ret = Ffuncall (nargs, args);
|
|
|
4269 }
|
|
|
4270 }
|
|
|
4271
|
|
|
4272 UNGCPRO;
|
|
|
4273 return ret;
|
|
|
4274 }
|
|
|
4275 }
|
|
|
4276
|
|
|
4277 Lisp_Object
|
|
|
4278 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
4279 enum run_hooks_condition cond)
|
|
|
4280 {
|
|
|
4281 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
4282 }
|
|
|
4283
|
|
|
4284 #if 0
|
|
|
4285
|
|
853
|
4286 /* From FSF 19.30, not currently used; seems like a big kludge. */
|
|
428
|
4287
|
|
|
4288 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
4289 present value of that symbol.
|
|
|
4290 Call each element of FUNLIST,
|
|
|
4291 passing each of them the rest of ARGS.
|
|
|
4292 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4293 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4294
|
|
|
4295 Lisp_Object
|
|
|
4296 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
4297 {
|
|
853
|
4298 omitted;
|
|
428
|
4299 }
|
|
|
4300
|
|
|
4301 #endif /* 0 */
|
|
|
4302
|
|
|
4303 void
|
|
|
4304 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
4305 {
|
|
|
4306 /* This function can GC */
|
|
|
4307 struct gcpro gcpro1;
|
|
|
4308 int i;
|
|
|
4309 va_list vargs;
|
|
|
4310 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4311
|
|
|
4312 va_start (vargs, nargs);
|
|
|
4313 funcall_args[0] = hook_var;
|
|
|
4314 for (i = 0; i < nargs; i++)
|
|
|
4315 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4316 va_end (vargs);
|
|
|
4317
|
|
|
4318 GCPRO1 (*funcall_args);
|
|
|
4319 gcpro1.nvars = nargs + 1;
|
|
|
4320 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4321 UNGCPRO;
|
|
|
4322 }
|
|
|
4323
|
|
|
4324 void
|
|
|
4325 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
4326 int nargs, ...)
|
|
|
4327 {
|
|
|
4328 /* This function can GC */
|
|
|
4329 struct gcpro gcpro1;
|
|
|
4330 int i;
|
|
|
4331 va_list vargs;
|
|
|
4332 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4333
|
|
|
4334 va_start (vargs, nargs);
|
|
|
4335 funcall_args[0] = hook_var;
|
|
|
4336 for (i = 0; i < nargs; i++)
|
|
|
4337 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4338 va_end (vargs);
|
|
|
4339
|
|
|
4340 GCPRO1 (*funcall_args);
|
|
|
4341 gcpro1.nvars = nargs + 1;
|
|
|
4342 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
4343 RUN_HOOKS_TO_COMPLETION);
|
|
|
4344 UNGCPRO;
|
|
|
4345 }
|
|
|
4346
|
|
|
4347 Lisp_Object
|
|
|
4348 run_hook (Lisp_Object hook)
|
|
|
4349 {
|
|
853
|
4350 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION);
|
|
428
|
4351 }
|
|
|
4352
|
|
|
4353
|
|
|
4354 /************************************************************************/
|
|
|
4355 /* Front-ends to eval, funcall, apply */
|
|
|
4356 /************************************************************************/
|
|
|
4357
|
|
|
4358 /* Apply fn to arg */
|
|
|
4359 Lisp_Object
|
|
|
4360 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
4361 {
|
|
|
4362 /* This function can GC */
|
|
|
4363 struct gcpro gcpro1;
|
|
|
4364 Lisp_Object args[2];
|
|
|
4365
|
|
|
4366 if (NILP (arg))
|
|
|
4367 return Ffuncall (1, &fn);
|
|
|
4368 GCPRO1 (args[0]);
|
|
|
4369 gcpro1.nvars = 2;
|
|
|
4370 args[0] = fn;
|
|
|
4371 args[1] = arg;
|
|
|
4372 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
4373 }
|
|
|
4374
|
|
|
4375 /* Call function fn on no arguments */
|
|
|
4376 Lisp_Object
|
|
|
4377 call0 (Lisp_Object fn)
|
|
|
4378 {
|
|
|
4379 /* This function can GC */
|
|
|
4380 struct gcpro gcpro1;
|
|
|
4381
|
|
|
4382 GCPRO1 (fn);
|
|
|
4383 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
4384 }
|
|
|
4385
|
|
|
4386 /* Call function fn with argument arg0 */
|
|
|
4387 Lisp_Object
|
|
|
4388 call1 (Lisp_Object fn,
|
|
|
4389 Lisp_Object arg0)
|
|
|
4390 {
|
|
|
4391 /* This function can GC */
|
|
|
4392 struct gcpro gcpro1;
|
|
|
4393 Lisp_Object args[2];
|
|
|
4394 args[0] = fn;
|
|
|
4395 args[1] = arg0;
|
|
|
4396 GCPRO1 (args[0]);
|
|
|
4397 gcpro1.nvars = 2;
|
|
|
4398 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
4399 }
|
|
|
4400
|
|
|
4401 /* Call function fn with arguments arg0, arg1 */
|
|
|
4402 Lisp_Object
|
|
|
4403 call2 (Lisp_Object fn,
|
|
|
4404 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4405 {
|
|
|
4406 /* This function can GC */
|
|
|
4407 struct gcpro gcpro1;
|
|
|
4408 Lisp_Object args[3];
|
|
|
4409 args[0] = fn;
|
|
|
4410 args[1] = arg0;
|
|
|
4411 args[2] = arg1;
|
|
|
4412 GCPRO1 (args[0]);
|
|
|
4413 gcpro1.nvars = 3;
|
|
|
4414 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4415 }
|
|
|
4416
|
|
|
4417 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4418 Lisp_Object
|
|
|
4419 call3 (Lisp_Object fn,
|
|
|
4420 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4421 {
|
|
|
4422 /* This function can GC */
|
|
|
4423 struct gcpro gcpro1;
|
|
|
4424 Lisp_Object args[4];
|
|
|
4425 args[0] = fn;
|
|
|
4426 args[1] = arg0;
|
|
|
4427 args[2] = arg1;
|
|
|
4428 args[3] = arg2;
|
|
|
4429 GCPRO1 (args[0]);
|
|
|
4430 gcpro1.nvars = 4;
|
|
|
4431 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4432 }
|
|
|
4433
|
|
|
4434 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4435 Lisp_Object
|
|
|
4436 call4 (Lisp_Object fn,
|
|
|
4437 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4438 Lisp_Object arg3)
|
|
|
4439 {
|
|
|
4440 /* This function can GC */
|
|
|
4441 struct gcpro gcpro1;
|
|
|
4442 Lisp_Object args[5];
|
|
|
4443 args[0] = fn;
|
|
|
4444 args[1] = arg0;
|
|
|
4445 args[2] = arg1;
|
|
|
4446 args[3] = arg2;
|
|
|
4447 args[4] = arg3;
|
|
|
4448 GCPRO1 (args[0]);
|
|
|
4449 gcpro1.nvars = 5;
|
|
|
4450 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4451 }
|
|
|
4452
|
|
|
4453 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4454 Lisp_Object
|
|
|
4455 call5 (Lisp_Object fn,
|
|
|
4456 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4457 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4458 {
|
|
|
4459 /* This function can GC */
|
|
|
4460 struct gcpro gcpro1;
|
|
|
4461 Lisp_Object args[6];
|
|
|
4462 args[0] = fn;
|
|
|
4463 args[1] = arg0;
|
|
|
4464 args[2] = arg1;
|
|
|
4465 args[3] = arg2;
|
|
|
4466 args[4] = arg3;
|
|
|
4467 args[5] = arg4;
|
|
|
4468 GCPRO1 (args[0]);
|
|
|
4469 gcpro1.nvars = 6;
|
|
|
4470 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4471 }
|
|
|
4472
|
|
|
4473 Lisp_Object
|
|
|
4474 call6 (Lisp_Object fn,
|
|
|
4475 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4476 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4477 {
|
|
|
4478 /* This function can GC */
|
|
|
4479 struct gcpro gcpro1;
|
|
|
4480 Lisp_Object args[7];
|
|
|
4481 args[0] = fn;
|
|
|
4482 args[1] = arg0;
|
|
|
4483 args[2] = arg1;
|
|
|
4484 args[3] = arg2;
|
|
|
4485 args[4] = arg3;
|
|
|
4486 args[5] = arg4;
|
|
|
4487 args[6] = arg5;
|
|
|
4488 GCPRO1 (args[0]);
|
|
|
4489 gcpro1.nvars = 7;
|
|
|
4490 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4491 }
|
|
|
4492
|
|
|
4493 Lisp_Object
|
|
|
4494 call7 (Lisp_Object fn,
|
|
|
4495 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4496 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4497 Lisp_Object arg6)
|
|
|
4498 {
|
|
|
4499 /* This function can GC */
|
|
|
4500 struct gcpro gcpro1;
|
|
|
4501 Lisp_Object args[8];
|
|
|
4502 args[0] = fn;
|
|
|
4503 args[1] = arg0;
|
|
|
4504 args[2] = arg1;
|
|
|
4505 args[3] = arg2;
|
|
|
4506 args[4] = arg3;
|
|
|
4507 args[5] = arg4;
|
|
|
4508 args[6] = arg5;
|
|
|
4509 args[7] = arg6;
|
|
|
4510 GCPRO1 (args[0]);
|
|
|
4511 gcpro1.nvars = 8;
|
|
|
4512 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4513 }
|
|
|
4514
|
|
|
4515 Lisp_Object
|
|
|
4516 call8 (Lisp_Object fn,
|
|
|
4517 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4518 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4519 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4520 {
|
|
|
4521 /* This function can GC */
|
|
|
4522 struct gcpro gcpro1;
|
|
|
4523 Lisp_Object args[9];
|
|
|
4524 args[0] = fn;
|
|
|
4525 args[1] = arg0;
|
|
|
4526 args[2] = arg1;
|
|
|
4527 args[3] = arg2;
|
|
|
4528 args[4] = arg3;
|
|
|
4529 args[5] = arg4;
|
|
|
4530 args[6] = arg5;
|
|
|
4531 args[7] = arg6;
|
|
|
4532 args[8] = arg7;
|
|
|
4533 GCPRO1 (args[0]);
|
|
|
4534 gcpro1.nvars = 9;
|
|
|
4535 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4536 }
|
|
|
4537
|
|
|
4538 Lisp_Object
|
|
|
4539 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4540 {
|
|
|
4541 if (current_buffer == buf)
|
|
|
4542 return call0 (fn);
|
|
|
4543 else
|
|
|
4544 {
|
|
|
4545 Lisp_Object val;
|
|
|
4546 int speccount = specpdl_depth();
|
|
|
4547 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4548 set_buffer_internal (buf);
|
|
|
4549 val = call0 (fn);
|
|
771
|
4550 unbind_to (speccount);
|
|
428
|
4551 return val;
|
|
|
4552 }
|
|
|
4553 }
|
|
|
4554
|
|
|
4555 Lisp_Object
|
|
|
4556 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4557 Lisp_Object arg0)
|
|
|
4558 {
|
|
|
4559 if (current_buffer == buf)
|
|
|
4560 return call1 (fn, arg0);
|
|
|
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 = call1 (fn, arg0);
|
|
771
|
4568 unbind_to (speccount);
|
|
428
|
4569 return val;
|
|
|
4570 }
|
|
|
4571 }
|
|
|
4572
|
|
|
4573 Lisp_Object
|
|
|
4574 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4575 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4576 {
|
|
|
4577 if (current_buffer == buf)
|
|
|
4578 return call2 (fn, arg0, arg1);
|
|
|
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 = call2 (fn, arg0, arg1);
|
|
771
|
4586 unbind_to (speccount);
|
|
428
|
4587 return val;
|
|
|
4588 }
|
|
|
4589 }
|
|
|
4590
|
|
|
4591 Lisp_Object
|
|
|
4592 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4593 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4594 {
|
|
|
4595 if (current_buffer == buf)
|
|
|
4596 return call3 (fn, arg0, arg1, arg2);
|
|
|
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 = call3 (fn, arg0, arg1, arg2);
|
|
771
|
4604 unbind_to (speccount);
|
|
428
|
4605 return val;
|
|
|
4606 }
|
|
|
4607 }
|
|
|
4608
|
|
|
4609 Lisp_Object
|
|
|
4610 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4611 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4612 Lisp_Object arg3)
|
|
|
4613 {
|
|
|
4614 if (current_buffer == buf)
|
|
|
4615 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4616 else
|
|
|
4617 {
|
|
|
4618 Lisp_Object val;
|
|
|
4619 int speccount = specpdl_depth();
|
|
|
4620 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4621 set_buffer_internal (buf);
|
|
|
4622 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
771
|
4623 unbind_to (speccount);
|
|
428
|
4624 return val;
|
|
|
4625 }
|
|
|
4626 }
|
|
|
4627
|
|
|
4628 Lisp_Object
|
|
|
4629 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4630 {
|
|
|
4631 if (current_buffer == buf)
|
|
|
4632 return Feval (form);
|
|
|
4633 else
|
|
|
4634 {
|
|
|
4635 Lisp_Object val;
|
|
|
4636 int speccount = specpdl_depth();
|
|
|
4637 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4638 set_buffer_internal (buf);
|
|
|
4639 val = Feval (form);
|
|
771
|
4640 unbind_to (speccount);
|
|
428
|
4641 return val;
|
|
|
4642 }
|
|
|
4643 }
|
|
|
4644
|
|
|
4645
|
|
|
4646 /************************************************************************/
|
|
|
4647 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4648 /************************************************************************/
|
|
|
4649
|
|
853
|
4650 int
|
|
|
4651 get_inhibit_flags (void)
|
|
|
4652 {
|
|
|
4653 return inhibit_flags;
|
|
|
4654 }
|
|
|
4655
|
|
|
4656 void
|
|
|
4657 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object prop)
|
|
|
4658 {
|
|
|
4659 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4660 {
|
|
|
4661 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj)
|
|
|
4662 && NILP (memq_no_quit (obj, Vmodifiable_buffers)))
|
|
|
4663 invalid_change
|
|
|
4664 ("Modification of this buffer not currently permitted", obj);
|
|
|
4665 }
|
|
|
4666 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4667 {
|
|
|
4668 if (what == OPERATION_DELETE_OBJECT
|
|
|
4669 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4670 || CONSOLEP (obj))
|
|
|
4671 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects)))
|
|
|
4672 invalid_change
|
|
|
4673 ("Deletion of this object not currently permitted", obj);
|
|
|
4674 }
|
|
|
4675 }
|
|
|
4676
|
|
|
4677 void
|
|
|
4678 note_object_created (Lisp_Object obj)
|
|
|
4679 {
|
|
|
4680 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4681 {
|
|
|
4682 if (BUFFERP (obj))
|
|
|
4683 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers);
|
|
|
4684 }
|
|
|
4685 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4686 {
|
|
|
4687 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4688 || CONSOLEP (obj))
|
|
|
4689 Vdeletable_permanent_display_objects =
|
|
|
4690 Fcons (obj, Vdeletable_permanent_display_objects);
|
|
|
4691 }
|
|
|
4692 }
|
|
|
4693
|
|
|
4694 void
|
|
|
4695 note_object_deleted (Lisp_Object obj)
|
|
|
4696 {
|
|
|
4697 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4698 {
|
|
|
4699 if (BUFFERP (obj))
|
|
|
4700 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers);
|
|
|
4701 }
|
|
|
4702 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4703 {
|
|
|
4704 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj)
|
|
|
4705 || CONSOLEP (obj))
|
|
|
4706 Vdeletable_permanent_display_objects =
|
|
|
4707 delq_no_quit (obj, Vdeletable_permanent_display_objects);
|
|
|
4708 }
|
|
|
4709 }
|
|
|
4710
|
|
|
4711 struct call_trapping_problems
|
|
|
4712 {
|
|
|
4713 Lisp_Object catchtag;
|
|
|
4714 Lisp_Object error_conditions;
|
|
|
4715 Lisp_Object data;
|
|
|
4716 Lisp_Object backtrace;
|
|
|
4717 Lisp_Object warning_class;
|
|
|
4718
|
|
867
|
4719 const CIbyte *warning_string;
|
|
853
|
4720 Lisp_Object (*fun) (void *);
|
|
|
4721 void *arg;
|
|
|
4722 };
|
|
428
|
4723
|
|
|
4724 static Lisp_Object
|
|
853
|
4725 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data,
|
|
|
4726 Lisp_Object opaque)
|
|
|
4727 {
|
|
|
4728 struct call_trapping_problems *p =
|
|
|
4729 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4730 struct gcpro gcpro1;
|
|
|
4731 Lisp_Object lstream = Qnil;
|
|
|
4732 Lisp_Object errstr;
|
|
|
4733 int speccount = specpdl_depth ();
|
|
|
4734
|
|
|
4735 if (! (inhibit_flags & INHIBIT_WARNING_ISSUE))
|
|
428
|
4736 {
|
|
853
|
4737 /* We're no longer protected against errors or quit here, so at
|
|
|
4738 least let's temporarily inhibit quit. We definitely do not
|
|
|
4739 want to inhibit quit during the calling of the function
|
|
|
4740 itself!!!!!!!!!!! */
|
|
|
4741
|
|
|
4742 specbind (Qinhibit_quit, Qt);
|
|
|
4743
|
|
|
4744 GCPRO1 (lstream);
|
|
|
4745 lstream = make_resizing_buffer_output_stream ();
|
|
|
4746 Fbacktrace (lstream, Qt);
|
|
|
4747 Lstream_flush (XLSTREAM (lstream));
|
|
|
4748 p->backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream));
|
|
|
4749 Lstream_delete (XLSTREAM (lstream));
|
|
|
4750 UNGCPRO;
|
|
|
4751
|
|
428
|
4752 /* #### This should call
|
|
853
|
4753 (with-output-to-string (display-error (cons error_conditions data))
|
|
428
|
4754 but that stuff is all in Lisp currently. */
|
|
853
|
4755 errstr =
|
|
|
4756 emacs_sprintf_string_lisp
|
|
|
4757 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s",
|
|
|
4758 Qnil, 4,
|
|
|
4759 build_msg_string (p->warning_string ? p->warning_string : "error"),
|
|
|
4760 error_conditions, data, p->backtrace);
|
|
|
4761
|
|
|
4762 warn_when_safe_lispobj (p->warning_class, current_warning_level (),
|
|
|
4763 errstr);
|
|
|
4764
|
|
|
4765 unbind_to (speccount);
|
|
|
4766
|
|
428
|
4767 }
|
|
853
|
4768 else
|
|
|
4769 p->backtrace = Qnil;
|
|
|
4770
|
|
|
4771 p->error_conditions = error_conditions;
|
|
|
4772 p->data = data;
|
|
|
4773
|
|
|
4774 Fthrow (p->catchtag, Qnil);
|
|
|
4775 return Qnil; /* not reached */
|
|
|
4776 }
|
|
|
4777
|
|
|
4778 static Lisp_Object
|
|
|
4779 call_trapping_problems_2 (Lisp_Object opaque)
|
|
|
4780 {
|
|
|
4781 struct call_trapping_problems *p =
|
|
|
4782 (struct call_trapping_problems *) get_opaque_ptr (opaque);
|
|
|
4783
|
|
|
4784 return (p->fun) (p->arg);
|
|
428
|
4785 }
|
|
|
4786
|
|
|
4787 static Lisp_Object
|
|
853
|
4788 call_trapping_problems_1 (Lisp_Object opaque)
|
|
|
4789 {
|
|
|
4790 return call_with_condition_handler (flagged_a_squirmer, opaque,
|
|
|
4791 call_trapping_problems_2, opaque);
|
|
|
4792 }
|
|
|
4793
|
|
|
4794 /* This is equivalent to (*fun) (arg), except that various conditions
|
|
|
4795 can be trapped or inhibited, according to FLAGS.
|
|
|
4796
|
|
|
4797 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs,
|
|
|
4798 the error is caught and a warning is issued, specifying the
|
|
|
4799 specific error that occurred and a backtrace. In that case,
|
|
|
4800 WARNING_STRING should be given, and will be printed at the
|
|
|
4801 beginning of the error to indicate where the error occurred.
|
|
|
4802
|
|
|
4803 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to
|
|
|
4804 `throw' out of the function being called are trapped, and a warning
|
|
|
4805 issued. (Again, WARNING_STRING should be given.)
|
|
|
4806
|
|
|
4807 (If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued;
|
|
|
4808 this applies to recursive invocations of call_trapping_problems, too.
|
|
|
4809
|
|
|
4810 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be
|
|
|
4811 issued, but at level `debug', which normally is below the minimum
|
|
|
4812 specified by `log-warning-minimum-level', meaning such warnings will
|
|
|
4813 be ignored entirely. The user can change this variable, however,
|
|
|
4814 to see the warnings.)
|
|
|
4815
|
|
|
4816 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is
|
|
|
4817 given, you are *guaranteed* that there will be no non-local exits
|
|
|
4818 out of this function.
|
|
|
4819
|
|
|
4820 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This
|
|
|
4821 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is
|
|
|
4822 automatically caught as well, and treated as an error; you can
|
|
|
4823 check for this using EQ (problems->error_conditions, Qquit).
|
|
|
4824
|
|
|
4825 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly
|
|
|
4826 turned on. (It will abort the code being called, but will still be
|
|
|
4827 trapped and reported as an error, unless NO_INHIBIT_ERRORS is
|
|
|
4828 given.) This is useful when QUIT checking has been turned off by a
|
|
|
4829 higher-level caller.
|
|
|
4830
|
|
|
4831 If FLAGS contains INHIBIT_GC, garbage collection is inhibited.
|
|
|
4832 This is useful for Lisp called within redisplay or inside of the
|
|
|
4833 QUIT macro (where GC is generally not expected), for example.
|
|
|
4834
|
|
|
4835 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION,
|
|
|
4836 Lisp code is not allowed to delete any window, buffers, frames, devices,
|
|
|
4837 or consoles that were already in existence at the time this function
|
|
|
4838 was called. (However, it's perfectly legal for code to create a new
|
|
|
4839 buffer and then delete it.)
|
|
|
4840
|
|
|
4841 #### It might be useful to have a flag that inhibits deletion of a
|
|
|
4842 specific permanent display object and everything it's attached to
|
|
|
4843 (e.g. a window, and the buffer, frame, device, and console it's
|
|
|
4844 attached to.
|
|
|
4845
|
|
|
4846 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp
|
|
|
4847 code is not allowed to modify the text of any buffers that were
|
|
|
4848 already in existence at the time this function was called.
|
|
|
4849 (However, it's perfectly legal for code to create a new buffer and
|
|
|
4850 then modify its text.)
|
|
|
4851
|
|
|
4852 [These last two flags are implemented using global variables
|
|
|
4853 Vdeletable_permanent_display_objects and Vmodifiable_buffers,
|
|
|
4854 which keep track of a list of all buffers or permanent display
|
|
|
4855 objects created since the last time one of these flags was set.
|
|
|
4856 The code that deletes buffers, etc. and modifies buffers checks
|
|
|
4857
|
|
|
4858 (1) if the corresponding flag is set (through the global variable
|
|
|
4859 inhibit_flags or its accessor function get_inhibit_flags()), and
|
|
|
4860
|
|
|
4861 (2) if the object to be modified or deleted is not in the
|
|
|
4862 appropriate list.
|
|
|
4863
|
|
|
4864 If so, it signals an error.
|
|
|
4865
|
|
|
4866 Recursive calls to call_trapping_problems() are allowed. In
|
|
|
4867 the case of the two flags mentioned above, the current values
|
|
|
4868 of the global variables are stored in an unwind-protect, and
|
|
|
4869 they're reset to nil.]
|
|
|
4870
|
|
|
4871 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not
|
|
|
4872 be entered if an error occurs inside the Lisp code being called,
|
|
|
4873 even when the user has requested an error. In such case, a warning
|
|
|
4874 is issued stating that access to the debugger is denied, unless
|
|
|
4875 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when
|
|
|
4876 calling Lisp code inside redisplay, in menu callbacks, etc. because
|
|
|
4877 in such cases either the display is in an inconsistent state or
|
|
|
4878 doing window operations is explicitly forbidden by the OS, and the
|
|
|
4879 debugger would causes visual changes on the screen and might create
|
|
|
4880 another frame.
|
|
|
4881
|
|
|
4882 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no
|
|
|
4883 changes of any sort to extents, faces, glyphs, buffer text,
|
|
|
4884 specifiers relating to display, other variables relating to
|
|
|
4885 display, splitting, deleting, or resizing windows or frames,
|
|
|
4886 deleting buffers, windows, frames, devices, or consoles, etc. is
|
|
|
4887 allowed. This is for things called absolutely in the middle of
|
|
|
4888 redisplay, which expects things to be *exactly* the same after the
|
|
|
4889 call as before. This isn't completely implemented and needs to be
|
|
|
4890 thought out some more to determine exactly what its semantics are.
|
|
|
4891 For the moment, turning on this flag also turns on
|
|
|
4892
|
|
|
4893 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
4894 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
4895 INHIBIT_ENTERING_DEBUGGER
|
|
|
4896 INHIBIT_WARNING_ISSUE
|
|
|
4897 INHIBIT_GC
|
|
|
4898
|
|
|
4899 #### The following five flags are defined, but unimplemented:
|
|
|
4900
|
|
|
4901 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6)
|
|
|
4902 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7)
|
|
|
4903 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8)
|
|
|
4904 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9)
|
|
|
4905 #define INHIBIT_CHARSET_CREATION (1<<10)
|
|
|
4906
|
|
|
4907 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that
|
|
|
4908 call_with_suspended_errors() was invoked. This exists only for
|
|
|
4909 debugging purposes -- often we want to break when a signal happens,
|
|
|
4910 but ignore signals from call_with_suspended_errors(), because they
|
|
|
4911 occur often and for legitimate reasons.
|
|
|
4912
|
|
|
4913 If PROBLEM is non-zero, it should be a pointer to a structure into
|
|
|
4914 which exact information about any occurring problems (either an
|
|
|
4915 error or an attempted throw past this boundary).
|
|
|
4916
|
|
|
4917 If a problem occurred and aborted operation (error, quit, or
|
|
|
4918 invalid throw), Qunbound is returned. Otherwise the return value
|
|
|
4919 from the call to (*fun) (arg) is returned. */
|
|
|
4920
|
|
|
4921 Lisp_Object
|
|
|
4922 call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
4923 const CIbyte *warning_string,
|
|
853
|
4924 int flags,
|
|
|
4925 struct call_trapping_problems_result *problem,
|
|
|
4926 Lisp_Object (*fun) (void *),
|
|
|
4927 void *arg)
|
|
|
4928 {
|
|
|
4929 int speccount = specpdl_depth();
|
|
|
4930 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4931 struct call_trapping_problems package;
|
|
|
4932 Lisp_Object opaque, thrown_tag, tem;
|
|
|
4933 int thrown = 0;
|
|
|
4934
|
|
|
4935 assert (SYMBOLP (warning_class)); /* sanity-check */
|
|
|
4936 assert (!NILP (warning_class));
|
|
|
4937
|
|
|
4938 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS;
|
|
|
4939
|
|
|
4940 package.warning_class = warning_class;
|
|
|
4941 package.warning_string = warning_string;
|
|
|
4942 package.fun = fun;
|
|
|
4943 package.arg = arg;
|
|
|
4944 package.catchtag =
|
|
|
4945 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag :
|
|
|
4946 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) :
|
|
|
4947 Qnil;
|
|
|
4948 package.error_conditions = Qnil;
|
|
|
4949 package.data = Qnil;
|
|
|
4950 package.backtrace = Qnil;
|
|
|
4951
|
|
|
4952 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)
|
|
|
4953 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION
|
|
|
4954 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION
|
|
|
4955 | INHIBIT_ENTERING_DEBUGGER
|
|
|
4956 | INHIBIT_WARNING_ISSUE
|
|
|
4957 | INHIBIT_GC;
|
|
|
4958
|
|
|
4959 {
|
|
|
4960 int new_inhibit_flags = inhibit_flags | flags;
|
|
|
4961 if (new_inhibit_flags != inhibit_flags)
|
|
|
4962 internal_bind_int (&inhibit_flags, new_inhibit_flags);
|
|
|
4963 }
|
|
|
4964
|
|
|
4965 if (flags & INHIBIT_QUIT)
|
|
|
4966 specbind (Qinhibit_quit, Qt);
|
|
|
4967
|
|
|
4968 if (flags & UNINHIBIT_QUIT)
|
|
|
4969 begin_do_check_for_quit ();
|
|
|
4970
|
|
|
4971 if (flags & INHIBIT_GC)
|
|
|
4972 begin_gc_forbidden ();
|
|
|
4973
|
|
|
4974 /* #### If we have nested calls to call_trapping_problems(), and the
|
|
|
4975 inner one creates some buffers/etc., should the outer one be able
|
|
|
4976 to delete them? I think so, but it means we need to combine rather
|
|
|
4977 than just reset the value. */
|
|
|
4978 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION)
|
|
|
4979 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil);
|
|
|
4980
|
|
|
4981 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION)
|
|
|
4982 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil);
|
|
|
4983
|
|
|
4984 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS))
|
|
|
4985 opaque = make_opaque_ptr (&package);
|
|
|
4986 else
|
|
|
4987 opaque = Qnil;
|
|
|
4988
|
|
|
4989 GCPRO5 (package.catchtag, package.error_conditions, package.data,
|
|
|
4990 package.backtrace, opaque);
|
|
|
4991
|
|
|
4992 if (flags & INTERNAL_INHIBIT_ERRORS)
|
|
|
4993 /* We need a catch so that our condition-handler can throw back here
|
|
|
4994 after printing the warning. (We print the warning in the stack
|
|
|
4995 context of the error, so we can get a backtrace.) */
|
|
|
4996 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque,
|
|
|
4997 &thrown, &thrown_tag);
|
|
|
4998 else if (flags & INTERNAL_INHIBIT_THROWS)
|
|
|
4999 /* We skip over the first wrapper, which traps errors. */
|
|
|
5000 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque,
|
|
|
5001 &thrown, &thrown_tag);
|
|
|
5002 else
|
|
|
5003 /* Nothing special. */
|
|
|
5004 tem = (fun) (arg);
|
|
|
5005
|
|
|
5006 if (thrown && !EQ (thrown_tag, package.catchtag)
|
|
|
5007 && (!flags & INHIBIT_WARNING_ISSUE))
|
|
|
5008 {
|
|
|
5009 Lisp_Object errstr;
|
|
|
5010
|
|
|
5011 if (!(flags & INHIBIT_QUIT))
|
|
|
5012 /* We're no longer protected against errors or quit here, so at
|
|
|
5013 least let's temporarily inhibit quit. */
|
|
|
5014 specbind (Qinhibit_quit, Qt);
|
|
|
5015 errstr =
|
|
|
5016 emacs_sprintf_string_lisp
|
|
|
5017 ("%s: Attempt to throw outside of function "
|
|
|
5018 "to catch `%s' with value `%s'",
|
|
|
5019 Qnil, 3, build_msg_string (warning_string ? warning_string : "error"),
|
|
|
5020 thrown_tag, tem);
|
|
|
5021
|
|
|
5022 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr);
|
|
|
5023 }
|
|
|
5024
|
|
|
5025 if (problem)
|
|
|
5026 {
|
|
|
5027 if (!thrown)
|
|
|
5028 {
|
|
|
5029 problem->caught_error = 0;
|
|
|
5030 problem->caught_throw = 0;
|
|
|
5031 problem->error_conditions = Qnil;
|
|
|
5032 problem->data = Qnil;
|
|
|
5033 problem->backtrace = Qnil;
|
|
|
5034 problem->thrown_tag = Qnil;
|
|
|
5035 problem->thrown_value = Qnil;
|
|
|
5036 }
|
|
|
5037 else if (EQ (thrown_tag, package.catchtag))
|
|
|
5038 {
|
|
|
5039 problem->caught_error = 1;
|
|
|
5040 problem->caught_throw = 0;
|
|
|
5041 problem->error_conditions = package.error_conditions;
|
|
|
5042 problem->data = package.data;
|
|
|
5043 problem->backtrace = package.backtrace;
|
|
|
5044 problem->thrown_tag = Qnil;
|
|
|
5045 problem->thrown_value = Qnil;
|
|
|
5046 }
|
|
|
5047 else
|
|
|
5048 {
|
|
|
5049 problem->caught_error = 0;
|
|
|
5050 problem->caught_throw = 1;
|
|
|
5051 problem->error_conditions = Qnil;
|
|
|
5052 problem->data = Qnil;
|
|
|
5053 problem->backtrace = Qnil;
|
|
|
5054 problem->thrown_tag = thrown_tag;
|
|
|
5055 problem->thrown_value = tem;
|
|
|
5056 }
|
|
|
5057 }
|
|
|
5058
|
|
|
5059 if (!NILP (package.catchtag) &&
|
|
|
5060 !EQ (package.catchtag, Vcatch_everything_tag))
|
|
|
5061 free_opaque_ptr (package.catchtag);
|
|
|
5062
|
|
|
5063 if (!NILP (opaque))
|
|
|
5064 free_opaque_ptr (opaque);
|
|
|
5065
|
|
|
5066 unbind_to (speccount);
|
|
|
5067 RETURN_UNGCPRO (thrown ? Qunbound : tem);
|
|
|
5068 }
|
|
|
5069
|
|
|
5070 struct va_call_trapping_problems
|
|
|
5071 {
|
|
|
5072 lisp_fn_t fun;
|
|
|
5073 int nargs;
|
|
|
5074 Lisp_Object *args;
|
|
|
5075 };
|
|
|
5076
|
|
|
5077 static Lisp_Object
|
|
|
5078 va_call_trapping_problems_1 (void *ai_mi_madre)
|
|
|
5079 {
|
|
|
5080 struct va_call_trapping_problems *ai_no_corrida =
|
|
|
5081 (struct va_call_trapping_problems *) ai_mi_madre;
|
|
|
5082 Lisp_Object pegar_no_bumbum;
|
|
|
5083
|
|
|
5084 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun,
|
|
|
5085 ai_no_corrida->args, ai_no_corrida->nargs);
|
|
|
5086 return pegar_no_bumbum;
|
|
|
5087 }
|
|
|
5088
|
|
|
5089 /* #### document me. */
|
|
|
5090
|
|
|
5091 Lisp_Object
|
|
|
5092 va_call_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5093 const CIbyte *warning_string,
|
|
853
|
5094 int flags,
|
|
|
5095 struct call_trapping_problems_result *problem,
|
|
|
5096 lisp_fn_t fun, int nargs, ...)
|
|
|
5097 {
|
|
|
5098 va_list vargs;
|
|
|
5099 Lisp_Object args[20];
|
|
|
5100 int i;
|
|
|
5101 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5102 struct gcpro gcpro1;
|
|
|
5103
|
|
|
5104 assert (nargs >= 0 && nargs < 20);
|
|
|
5105
|
|
|
5106 va_start (vargs, nargs);
|
|
|
5107 for (i = 0; i < nargs; i++)
|
|
|
5108 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5109 va_end (vargs);
|
|
|
5110
|
|
|
5111 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5112 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5113 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5114
|
|
|
5115 GCPRO1_ARRAY (args, nargs);
|
|
|
5116 RETURN_UNGCPRO
|
|
|
5117 (call_trapping_problems
|
|
|
5118 (warning_class, warning_string, flags, problem,
|
|
|
5119 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas));
|
|
|
5120 }
|
|
|
5121
|
|
|
5122 /* this is an older interface, barely different from
|
|
|
5123 va_call_trapping_problems.
|
|
|
5124
|
|
|
5125 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into
|
|
|
5126 va_call_trapping_problems(). */
|
|
|
5127
|
|
|
5128 Lisp_Object
|
|
|
5129 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval,
|
|
|
5130 Lisp_Object class, Error_Behavior errb,
|
|
|
5131 int nargs, ...)
|
|
|
5132 {
|
|
|
5133 va_list vargs;
|
|
|
5134 Lisp_Object args[20];
|
|
|
5135 int i;
|
|
|
5136 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas;
|
|
|
5137 int flags;
|
|
|
5138 struct gcpro gcpro1;
|
|
|
5139
|
|
|
5140 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
5141 assert (!NILP (class));
|
|
|
5142 assert (nargs >= 0 && nargs < 20);
|
|
|
5143
|
|
|
5144 va_start (vargs, nargs);
|
|
|
5145 for (i = 0; i < nargs; i++)
|
|
|
5146 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
5147 va_end (vargs);
|
|
|
5148
|
|
|
5149 /* If error-checking is not disabled, just call the function. */
|
|
|
5150
|
|
|
5151 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
5152 {
|
|
|
5153 Lisp_Object val;
|
|
|
5154 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
5155 return val;
|
|
|
5156 }
|
|
|
5157
|
|
|
5158 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
5159 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5160 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN))
|
|
|
5161 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER;
|
|
|
5162 else
|
|
|
5163 {
|
|
|
5164 assert (ERRB_EQ (errb, ERROR_ME_WARN));
|
|
|
5165 flags = INHIBIT_ENTERING_DEBUGGER;
|
|
|
5166 }
|
|
|
5167
|
|
|
5168 flags |= CALL_WITH_SUSPENDED_ERRORS;
|
|
|
5169
|
|
|
5170 fazer_invocacao_atrapalhando_problemas.fun = fun;
|
|
|
5171 fazer_invocacao_atrapalhando_problemas.nargs = nargs;
|
|
|
5172 fazer_invocacao_atrapalhando_problemas.args = args;
|
|
|
5173
|
|
|
5174 GCPRO1_ARRAY (args, nargs);
|
|
|
5175 {
|
|
|
5176 Lisp_Object its_way_too_goddamn_late =
|
|
|
5177 call_trapping_problems
|
|
|
5178 (class, 0, flags, 0, va_call_trapping_problems_1,
|
|
|
5179 &fazer_invocacao_atrapalhando_problemas);
|
|
|
5180 UNGCPRO;
|
|
|
5181 if (UNBOUNDP (its_way_too_goddamn_late))
|
|
|
5182 return retval;
|
|
|
5183 else
|
|
|
5184 return its_way_too_goddamn_late;
|
|
|
5185 }
|
|
|
5186 }
|
|
|
5187
|
|
|
5188 struct calln_trapping_problems
|
|
|
5189 {
|
|
|
5190 int nargs;
|
|
|
5191 Lisp_Object *args;
|
|
|
5192 };
|
|
|
5193
|
|
|
5194 static Lisp_Object
|
|
|
5195 calln_trapping_problems_1 (void *puta)
|
|
|
5196 {
|
|
|
5197 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta;
|
|
|
5198
|
|
|
5199 return Ffuncall (p->nargs, p->args);
|
|
428
|
5200 }
|
|
|
5201
|
|
|
5202 static Lisp_Object
|
|
853
|
5203 calln_trapping_problems (Lisp_Object warning_class,
|
|
867
|
5204 const CIbyte *warning_string, int flags,
|
|
853
|
5205 struct call_trapping_problems_result *problem,
|
|
|
5206 int nargs, Lisp_Object *args)
|
|
|
5207 {
|
|
|
5208 struct calln_trapping_problems foo;
|
|
|
5209 struct gcpro gcpro1;
|
|
|
5210
|
|
|
5211 if (SYMBOLP (args[0]))
|
|
|
5212 {
|
|
|
5213 Lisp_Object tem = XSYMBOL (args[0])->function;
|
|
|
5214 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5215 {
|
|
|
5216 if (problem)
|
|
|
5217 {
|
|
|
5218 problem->caught_error = 0;
|
|
|
5219 problem->caught_throw = 0;
|
|
|
5220 problem->error_conditions = Qnil;
|
|
|
5221 problem->data = Qnil;
|
|
|
5222 problem->backtrace = Qnil;
|
|
|
5223 problem->thrown_tag = Qnil;
|
|
|
5224 problem->thrown_value = Qnil;
|
|
|
5225 }
|
|
|
5226 return Qnil;
|
|
|
5227 }
|
|
|
5228 }
|
|
|
5229
|
|
|
5230 foo.nargs = nargs;
|
|
|
5231 foo.args = args;
|
|
|
5232
|
|
|
5233 GCPRO1_ARRAY (args, nargs);
|
|
|
5234 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string,
|
|
|
5235 flags, problem,
|
|
|
5236 calln_trapping_problems_1,
|
|
|
5237 &foo));
|
|
|
5238 }
|
|
|
5239
|
|
|
5240 /* #### fix these functions to follow the calling convention of
|
|
|
5241 call_trapping_problems! */
|
|
|
5242
|
|
|
5243 Lisp_Object
|
|
867
|
5244 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5245 int flags)
|
|
|
5246 {
|
|
|
5247 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1,
|
|
|
5248 &function);
|
|
428
|
5249 }
|
|
|
5250
|
|
|
5251 Lisp_Object
|
|
867
|
5252 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5253 Lisp_Object object, int flags)
|
|
|
5254 {
|
|
|
5255 Lisp_Object args[2];
|
|
|
5256
|
|
|
5257 args[0] = function;
|
|
|
5258 args[1] = object;
|
|
|
5259
|
|
|
5260 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2,
|
|
|
5261 args);
|
|
|
5262 }
|
|
|
5263
|
|
|
5264 Lisp_Object
|
|
867
|
5265 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5266 Lisp_Object object1, Lisp_Object object2,
|
|
|
5267 int flags)
|
|
|
5268 {
|
|
|
5269 Lisp_Object args[3];
|
|
|
5270
|
|
|
5271 args[0] = function;
|
|
|
5272 args[1] = object1;
|
|
|
5273 args[2] = object2;
|
|
|
5274
|
|
|
5275 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3,
|
|
|
5276 args);
|
|
|
5277 }
|
|
|
5278
|
|
|
5279 Lisp_Object
|
|
867
|
5280 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5281 Lisp_Object object1, Lisp_Object object2,
|
|
|
5282 Lisp_Object object3, int flags)
|
|
|
5283 {
|
|
|
5284 Lisp_Object args[4];
|
|
|
5285
|
|
|
5286 args[0] = function;
|
|
|
5287 args[1] = object1;
|
|
|
5288 args[2] = object2;
|
|
|
5289 args[3] = object3;
|
|
|
5290
|
|
|
5291 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4,
|
|
|
5292 args);
|
|
|
5293 }
|
|
|
5294
|
|
|
5295 Lisp_Object
|
|
867
|
5296 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function,
|
|
853
|
5297 Lisp_Object object1, Lisp_Object object2,
|
|
|
5298 Lisp_Object object3, Lisp_Object object4,
|
|
|
5299 int flags)
|
|
|
5300 {
|
|
|
5301 Lisp_Object args[5];
|
|
|
5302
|
|
|
5303 args[0] = function;
|
|
|
5304 args[1] = object1;
|
|
|
5305 args[2] = object2;
|
|
|
5306 args[3] = object3;
|
|
|
5307 args[4] = object4;
|
|
|
5308
|
|
|
5309 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5,
|
|
|
5310 args);
|
|
|
5311 }
|
|
|
5312
|
|
|
5313 Lisp_Object
|
|
867
|
5314 call5_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 Lisp_Object object5, int flags)
|
|
|
5318 {
|
|
|
5319 Lisp_Object args[6];
|
|
|
5320
|
|
|
5321 args[0] = function;
|
|
|
5322 args[1] = object1;
|
|
|
5323 args[2] = object2;
|
|
|
5324 args[3] = object3;
|
|
|
5325 args[4] = object4;
|
|
|
5326 args[5] = object5;
|
|
|
5327
|
|
|
5328 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6,
|
|
|
5329 args);
|
|
|
5330 }
|
|
|
5331
|
|
|
5332 struct eval_in_buffer_trapping_problems
|
|
|
5333 {
|
|
|
5334 struct buffer *buf;
|
|
|
5335 Lisp_Object form;
|
|
|
5336 };
|
|
|
5337
|
|
|
5338 static Lisp_Object
|
|
|
5339 eval_in_buffer_trapping_problems_1 (void *arg)
|
|
|
5340 {
|
|
|
5341 struct eval_in_buffer_trapping_problems *p =
|
|
|
5342 (struct eval_in_buffer_trapping_problems *) arg;
|
|
|
5343
|
|
|
5344 return eval_in_buffer (p->buf, p->form);
|
|
|
5345 }
|
|
|
5346
|
|
|
5347 /* #### fix these functions to follow the calling convention of
|
|
|
5348 call_trapping_problems! */
|
|
|
5349
|
|
|
5350 Lisp_Object
|
|
867
|
5351 eval_in_buffer_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5352 struct buffer *buf, Lisp_Object form,
|
|
|
5353 int flags)
|
|
|
5354 {
|
|
|
5355 struct eval_in_buffer_trapping_problems p;
|
|
|
5356 Lisp_Object buffer = wrap_buffer (buf);
|
|
428
|
5357 struct gcpro gcpro1, gcpro2;
|
|
|
5358
|
|
853
|
5359 GCPRO2 (buffer, form);
|
|
|
5360 p.buf = buf;
|
|
|
5361 p.form = form;
|
|
|
5362 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0,
|
|
|
5363 eval_in_buffer_trapping_problems_1,
|
|
|
5364 &p));
|
|
|
5365 }
|
|
|
5366
|
|
|
5367 Lisp_Object
|
|
867
|
5368 run_hook_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5369 Lisp_Object hook_symbol,
|
|
|
5370 int flags)
|
|
|
5371 {
|
|
|
5372 return run_hook_with_args_trapping_problems (warning_string, 1, &hook_symbol,
|
|
|
5373 RUN_HOOKS_TO_COMPLETION,
|
|
|
5374 flags);
|
|
428
|
5375 }
|
|
|
5376
|
|
|
5377 static Lisp_Object
|
|
853
|
5378 safe_run_hook_trapping_problems_1 (void *puta)
|
|
|
5379 {
|
|
|
5380 Lisp_Object hook = VOID_TO_LISP (puta);
|
|
|
5381
|
|
|
5382 run_hook (hook);
|
|
428
|
5383 return Qnil;
|
|
|
5384 }
|
|
|
5385
|
|
853
|
5386 /* Same as run_hook_trapping_problems() but also set the hook to nil
|
|
|
5387 if an error occurs (but not a quit). */
|
|
|
5388
|
|
428
|
5389 Lisp_Object
|
|
867
|
5390 safe_run_hook_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5391 Lisp_Object hook_symbol,
|
|
|
5392 int flags)
|
|
|
5393 {
|
|
428
|
5394 Lisp_Object tem;
|
|
853
|
5395 struct gcpro gcpro1, gcpro2;
|
|
|
5396 struct call_trapping_problems_result prob;
|
|
428
|
5397
|
|
|
5398 if (!initialized || preparing_for_armageddon)
|
|
|
5399 return Qnil;
|
|
|
5400 tem = find_symbol_value (hook_symbol);
|
|
|
5401 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
5402 return Qnil;
|
|
|
5403
|
|
853
|
5404 GCPRO2 (hook_symbol, tem);
|
|
|
5405 tem = call_trapping_problems (Qerror, warning_string, flags,
|
|
|
5406 &prob,
|
|
|
5407 safe_run_hook_trapping_problems_1,
|
|
|
5408 LISP_TO_VOID (hook_symbol));
|
|
|
5409 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions,
|
|
|
5410 Qquit)))
|
|
|
5411 Fset (hook_symbol, Qnil);
|
|
|
5412 RETURN_UNGCPRO (tem);
|
|
|
5413 }
|
|
|
5414
|
|
|
5415 struct run_hook_with_args_in_buffer_trapping_problems
|
|
|
5416 {
|
|
|
5417 struct buffer *buf;
|
|
|
5418 int nargs;
|
|
|
5419 Lisp_Object *args;
|
|
|
5420 enum run_hooks_condition cond;
|
|
|
5421 };
|
|
|
5422
|
|
|
5423 static Lisp_Object
|
|
|
5424 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta)
|
|
|
5425 {
|
|
|
5426 struct run_hook_with_args_in_buffer_trapping_problems *porra =
|
|
|
5427 (struct run_hook_with_args_in_buffer_trapping_problems *) puta;
|
|
|
5428
|
|
|
5429 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args,
|
|
|
5430 porra->cond);
|
|
|
5431 }
|
|
|
5432
|
|
|
5433 /* #### fix these functions to follow the calling convention of
|
|
|
5434 call_trapping_problems! */
|
|
428
|
5435
|
|
|
5436 Lisp_Object
|
|
867
|
5437 run_hook_with_args_in_buffer_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5438 struct buffer *buf, int nargs,
|
|
|
5439 Lisp_Object *args,
|
|
|
5440 enum run_hooks_condition cond,
|
|
|
5441 int flags)
|
|
|
5442 {
|
|
|
5443 Lisp_Object sym, val, ret;
|
|
|
5444 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust;
|
|
428
|
5445 struct gcpro gcpro1;
|
|
|
5446
|
|
|
5447 if (!initialized || preparing_for_armageddon)
|
|
853
|
5448 /* We need to bail out of here pronto. */
|
|
428
|
5449 return Qnil;
|
|
|
5450
|
|
853
|
5451 GCPRO1_ARRAY (args, nargs);
|
|
|
5452
|
|
|
5453 sym = args[0];
|
|
|
5454 val = symbol_value_in_buffer (sym, wrap_buffer (buf));
|
|
|
5455 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
5456
|
|
|
5457 if (UNBOUNDP (val) || NILP (val))
|
|
|
5458 RETURN_UNGCPRO (ret);
|
|
|
5459
|
|
|
5460 diversity_and_distrust.buf = buf;
|
|
|
5461 diversity_and_distrust.nargs = nargs;
|
|
|
5462 diversity_and_distrust.args = args;
|
|
|
5463 diversity_and_distrust.cond = cond;
|
|
|
5464
|
|
|
5465 RETURN_UNGCPRO
|
|
|
5466 (call_trapping_problems
|
|
|
5467 (Qerror, warning_string,
|
|
|
5468 flags, 0,
|
|
|
5469 run_hook_with_args_in_buffer_trapping_problems_1,
|
|
|
5470 &diversity_and_distrust));
|
|
428
|
5471 }
|
|
|
5472
|
|
|
5473 Lisp_Object
|
|
867
|
5474 run_hook_with_args_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5475 int nargs,
|
|
|
5476 Lisp_Object *args,
|
|
|
5477 enum run_hooks_condition cond,
|
|
|
5478 int flags)
|
|
|
5479 {
|
|
|
5480 return run_hook_with_args_in_buffer_trapping_problems
|
|
|
5481 (warning_string, current_buffer, nargs, args, cond, flags);
|
|
428
|
5482 }
|
|
|
5483
|
|
|
5484 Lisp_Object
|
|
867
|
5485 va_run_hook_with_args_trapping_problems (const CIbyte *warning_string,
|
|
853
|
5486 Lisp_Object hook_var,
|
|
|
5487 int nargs, ...)
|
|
|
5488 {
|
|
|
5489 /* This function can GC */
|
|
|
5490 struct gcpro gcpro1;
|
|
|
5491 int i;
|
|
|
5492 va_list vargs;
|
|
|
5493 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5494 int flags;
|
|
|
5495
|
|
|
5496 va_start (vargs, nargs);
|
|
|
5497 funcall_args[0] = hook_var;
|
|
|
5498 for (i = 0; i < nargs; i++)
|
|
|
5499 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5500 flags = va_arg (vargs, int);
|
|
|
5501 va_end (vargs);
|
|
|
5502
|
|
|
5503 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5504 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
|
5505 (warning_string, current_buffer, nargs + 1, funcall_args,
|
|
|
5506 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5507 }
|
|
|
5508
|
|
|
5509 Lisp_Object
|
|
867
|
5510 va_run_hook_with_args_in_buffer_trapping_problems (const CIbyte *
|
|
853
|
5511 warning_string,
|
|
|
5512 struct buffer *buf,
|
|
|
5513 Lisp_Object hook_var,
|
|
|
5514 int nargs, ...)
|
|
|
5515 {
|
|
|
5516 /* This function can GC */
|
|
|
5517 struct gcpro gcpro1;
|
|
|
5518 int i;
|
|
|
5519 va_list vargs;
|
|
|
5520 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
5521 int flags;
|
|
|
5522
|
|
|
5523 va_start (vargs, nargs);
|
|
|
5524 funcall_args[0] = hook_var;
|
|
|
5525 for (i = 0; i < nargs; i++)
|
|
|
5526 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
5527 flags = va_arg (vargs, int);
|
|
|
5528 va_end (vargs);
|
|
|
5529
|
|
|
5530 GCPRO1_ARRAY (funcall_args, nargs + 1);
|
|
|
5531 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems
|
|
|
5532 (warning_string, buf, nargs + 1, funcall_args,
|
|
|
5533 RUN_HOOKS_TO_COMPLETION, flags));
|
|
428
|
5534 }
|
|
|
5535
|
|
887
|
5536 static void
|
|
|
5537 run_post_gc_hook()
|
|
|
5538 {
|
|
|
5539 Lisp_Object args[2];
|
|
|
5540
|
|
|
5541 args[0] = Qpost_gc_hook;
|
|
|
5542 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list()), Qnil);
|
|
|
5543
|
|
|
5544 run_hook_with_args_trapping_problems
|
|
|
5545 ("Error in post-gc-hook",
|
|
|
5546 2, args,
|
|
|
5547 RUN_HOOKS_TO_COMPLETION,
|
|
930
|
5548 INHIBIT_QUIT | NO_INHIBIT_ERRORS);
|
|
887
|
5549 }
|
|
428
|
5550
|
|
|
5551 /************************************************************************/
|
|
|
5552 /* The special binding stack */
|
|
771
|
5553 /* Most C code should simply use specbind() and unbind_to_1(). */
|
|
428
|
5554 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
5555 /************************************************************************/
|
|
|
5556
|
|
|
5557 #define min_max_specpdl_size 400
|
|
|
5558
|
|
|
5559 void
|
|
647
|
5560 grow_specpdl (EMACS_INT reserved)
|
|
|
5561 {
|
|
|
5562 EMACS_INT size_needed = specpdl_depth() + reserved;
|
|
428
|
5563 if (size_needed >= max_specpdl_size)
|
|
|
5564 {
|
|
|
5565 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
5566 max_specpdl_size = min_max_specpdl_size;
|
|
|
5567 if (size_needed >= max_specpdl_size)
|
|
|
5568 {
|
|
|
5569 if (!NILP (Vdebug_on_error) ||
|
|
|
5570 !NILP (Vdebug_on_signal))
|
|
|
5571 /* Leave room for some specpdl in the debugger. */
|
|
|
5572 max_specpdl_size = size_needed + 100;
|
|
563
|
5573 signal_continuable_error
|
|
|
5574 (Qstack_overflow,
|
|
|
5575 "Variable binding depth exceeds max-specpdl-size", Qunbound);
|
|
428
|
5576 }
|
|
|
5577 }
|
|
|
5578 while (specpdl_size < size_needed)
|
|
|
5579 {
|
|
|
5580 specpdl_size *= 2;
|
|
|
5581 if (specpdl_size > max_specpdl_size)
|
|
|
5582 specpdl_size = max_specpdl_size;
|
|
|
5583 }
|
|
|
5584 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
5585 specpdl_ptr = specpdl + specpdl_depth();
|
|
853
|
5586 check_specbind_stack_sanity ();
|
|
428
|
5587 }
|
|
|
5588
|
|
|
5589
|
|
|
5590 /* Handle unbinding buffer-local variables */
|
|
|
5591 static Lisp_Object
|
|
|
5592 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
5593 {
|
|
|
5594 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5595 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
853
|
5596 Lisp_Object victim = ovalue;
|
|
|
5597 Lisp_Object buf = get_buffer (XCAR (victim), 0);
|
|
|
5598 ovalue = XCDR (victim);
|
|
428
|
5599
|
|
|
5600 free_cons (victim);
|
|
|
5601
|
|
|
5602 if (NILP (buf))
|
|
|
5603 {
|
|
|
5604 /* Deleted buffer -- do nothing */
|
|
|
5605 }
|
|
|
5606 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
5607 {
|
|
|
5608 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5609 * (kill-local-variable can do this.)
|
|
|
5610 * Do nothing in this case.
|
|
|
5611 */
|
|
|
5612 }
|
|
|
5613 else if (EQ (buf, current))
|
|
|
5614 Fset (symbol, ovalue);
|
|
|
5615 else
|
|
|
5616 {
|
|
|
5617 /* Urk! Somebody switched buffers */
|
|
|
5618 struct gcpro gcpro1;
|
|
|
5619 GCPRO1 (current);
|
|
|
5620 Fset_buffer (buf);
|
|
|
5621 Fset (symbol, ovalue);
|
|
|
5622 Fset_buffer (current);
|
|
|
5623 UNGCPRO;
|
|
|
5624 }
|
|
|
5625 return symbol;
|
|
|
5626 }
|
|
|
5627
|
|
|
5628 static Lisp_Object
|
|
|
5629 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
5630 {
|
|
|
5631 Lisp_Object current = Fcurrent_buffer ();
|
|
|
5632 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
5633
|
|
|
5634 buffer = get_buffer (buffer, 0);
|
|
|
5635 if (NILP (buffer))
|
|
|
5636 {
|
|
|
5637 /* Deleted buffer -- do nothing */
|
|
|
5638 }
|
|
|
5639 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
5640 {
|
|
|
5641 /* Was buffer-local when binding was made, now no longer is.
|
|
|
5642 * (kill-local-variable can do this.)
|
|
|
5643 * Do nothing in this case.
|
|
|
5644 */
|
|
|
5645 }
|
|
|
5646 else if (EQ (buffer, current))
|
|
|
5647 Fkill_local_variable (symbol);
|
|
|
5648 else
|
|
|
5649 {
|
|
|
5650 /* Urk! Somebody switched buffers */
|
|
|
5651 struct gcpro gcpro1;
|
|
|
5652 GCPRO1 (current);
|
|
|
5653 Fset_buffer (buffer);
|
|
|
5654 Fkill_local_variable (symbol);
|
|
|
5655 Fset_buffer (current);
|
|
|
5656 UNGCPRO;
|
|
|
5657 }
|
|
|
5658 return symbol;
|
|
|
5659 }
|
|
|
5660
|
|
|
5661
|
|
|
5662 void
|
|
|
5663 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
5664 {
|
|
|
5665 SPECBIND (symbol, value);
|
|
853
|
5666
|
|
|
5667 check_specbind_stack_sanity ();
|
|
428
|
5668 }
|
|
|
5669
|
|
|
5670 void
|
|
|
5671 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
5672 {
|
|
|
5673 int buffer_local =
|
|
|
5674 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
5675
|
|
|
5676 if (buffer_local == 0)
|
|
|
5677 {
|
|
|
5678 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
771
|
5679 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */
|
|
428
|
5680 }
|
|
|
5681 else if (buffer_local > 0)
|
|
|
5682 {
|
|
|
5683 /* Already buffer-local */
|
|
|
5684 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
5685 find_symbol_value (symbol));
|
|
|
5686 specpdl_ptr->func = specbind_unwind_local;
|
|
|
5687 }
|
|
|
5688 else
|
|
|
5689 {
|
|
|
5690 /* About to become buffer-local */
|
|
|
5691 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
5692 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
5693 }
|
|
|
5694
|
|
|
5695 specpdl_ptr->symbol = symbol;
|
|
|
5696 specpdl_ptr++;
|
|
|
5697 specpdl_depth_counter++;
|
|
|
5698
|
|
|
5699 Fset (symbol, value);
|
|
853
|
5700
|
|
|
5701 check_specbind_stack_sanity ();
|
|
428
|
5702 }
|
|
|
5703
|
|
771
|
5704 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter
|
|
|
5705 whether a normal or non-local exit occurs. (You need to call unbind_to_1()
|
|
|
5706 before your function returns normally, passing in the integer returned
|
|
|
5707 by this function.) Note: As long as the unwind-protect exists, ARG is
|
|
|
5708 automatically GCPRO'd. The return value from FUNCTION is completely
|
|
|
5709 ignored. #### We should eliminate it entirely. */
|
|
|
5710
|
|
|
5711 int
|
|
428
|
5712 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
5713 Lisp_Object arg)
|
|
|
5714 {
|
|
|
5715 SPECPDL_RESERVE (1);
|
|
|
5716 specpdl_ptr->func = function;
|
|
|
5717 specpdl_ptr->symbol = Qnil;
|
|
|
5718 specpdl_ptr->old_value = arg;
|
|
|
5719 specpdl_ptr++;
|
|
|
5720 specpdl_depth_counter++;
|
|
853
|
5721 check_specbind_stack_sanity ();
|
|
771
|
5722 return specpdl_depth_counter - 1;
|
|
|
5723 }
|
|
|
5724
|
|
|
5725 static Lisp_Object
|
|
802
|
5726 restore_lisp_object (Lisp_Object cons)
|
|
|
5727 {
|
|
|
5728 Lisp_Object opaque = XCAR (cons);
|
|
|
5729 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque);
|
|
|
5730 *addr = XCDR (cons);
|
|
|
5731 free_opaque_ptr (opaque);
|
|
853
|
5732 free_cons (cons);
|
|
802
|
5733 return Qnil;
|
|
|
5734 }
|
|
|
5735
|
|
|
5736 /* Establish an unwind-protect which will restore the Lisp_Object pointed to
|
|
|
5737 by ADDR with the value VAL. */
|
|
814
|
5738 static int
|
|
802
|
5739 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr,
|
|
|
5740 Lisp_Object val)
|
|
|
5741 {
|
|
|
5742 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
5743 return record_unwind_protect (restore_lisp_object,
|
|
|
5744 noseeum_cons (opaque, val));
|
|
|
5745 }
|
|
|
5746
|
|
|
5747 /* Similar to specbind() but for any C variable whose value is a
|
|
|
5748 Lisp_Object. Sets up an unwind-protect to restore the variable
|
|
|
5749 pointed to by ADDR to its existing value, and then changes its
|
|
|
5750 value to NEWVAL. Returns the previous value of specpdl_depth();
|
|
|
5751 pass this to unbind_to() after you are done. */
|
|
|
5752 int
|
|
|
5753 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval)
|
|
|
5754 {
|
|
|
5755 int count = specpdl_depth ();
|
|
|
5756 record_unwind_protect_restoring_lisp_object (addr, *addr);
|
|
|
5757 *addr = newval;
|
|
|
5758 return count;
|
|
|
5759 }
|
|
|
5760
|
|
|
5761 static Lisp_Object
|
|
|
5762 restore_int (Lisp_Object cons)
|
|
|
5763 {
|
|
|
5764 Lisp_Object opaque = XCAR (cons);
|
|
|
5765 Lisp_Object lval = XCDR (cons);
|
|
|
5766 int *addr = (int *) get_opaque_ptr (opaque);
|
|
|
5767 int val;
|
|
|
5768
|
|
|
5769 if (INTP (lval))
|
|
|
5770 val = XINT (lval);
|
|
|
5771 else
|
|
|
5772 {
|
|
|
5773 val = (int) get_opaque_ptr (lval);
|
|
|
5774 free_opaque_ptr (lval);
|
|
|
5775 }
|
|
|
5776
|
|
|
5777 *addr = val;
|
|
|
5778 free_opaque_ptr (opaque);
|
|
853
|
5779 free_cons (cons);
|
|
802
|
5780 return Qnil;
|
|
|
5781 }
|
|
|
5782
|
|
|
5783 /* Establish an unwind-protect which will restore the int pointed to
|
|
|
5784 by ADDR with the value VAL. This function works correctly with
|
|
|
5785 all ints, even those that don't fit into a Lisp integer. */
|
|
814
|
5786 static int
|
|
802
|
5787 record_unwind_protect_restoring_int (int *addr, int val)
|
|
|
5788 {
|
|
|
5789 Lisp_Object opaque = make_opaque_ptr (addr);
|
|
|
5790 Lisp_Object lval;
|
|
|
5791
|
|
|
5792 if (NUMBER_FITS_IN_AN_EMACS_INT (val))
|
|
|
5793 lval = make_int (val);
|
|
|
5794 else
|
|
|
5795 lval = make_opaque_ptr ((void *) val);
|
|
|
5796 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval));
|
|
|
5797 }
|
|
|
5798
|
|
|
5799 /* Similar to specbind() but for any C variable whose value is an int.
|
|
|
5800 Sets up an unwind-protect to restore the variable pointed to by
|
|
|
5801 ADDR to its existing value, and then changes its value to NEWVAL.
|
|
|
5802 Returns the previous value of specpdl_depth(); pass this to
|
|
|
5803 unbind_to() after you are done. This function works correctly with
|
|
|
5804 all ints, even those that don't fit into a Lisp integer. */
|
|
|
5805 int
|
|
|
5806 internal_bind_int (int *addr, int newval)
|
|
|
5807 {
|
|
|
5808 int count = specpdl_depth ();
|
|
|
5809 record_unwind_protect_restoring_int (addr, *addr);
|
|
|
5810 *addr = newval;
|
|
|
5811 return count;
|
|
|
5812 }
|
|
|
5813
|
|
|
5814 static Lisp_Object
|
|
771
|
5815 free_pointer (Lisp_Object opaque)
|
|
|
5816 {
|
|
|
5817 xfree (get_opaque_ptr (opaque));
|
|
|
5818 free_opaque_ptr (opaque);
|
|
|
5819 return Qnil;
|
|
|
5820 }
|
|
|
5821
|
|
|
5822 /* Establish an unwind-protect which will free the specified block.
|
|
|
5823 */
|
|
|
5824 int
|
|
|
5825 record_unwind_protect_freeing (void *ptr)
|
|
|
5826 {
|
|
|
5827 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
5828 return record_unwind_protect (free_pointer, opaque);
|
|
|
5829 }
|
|
|
5830
|
|
|
5831 static Lisp_Object
|
|
|
5832 free_dynarr (Lisp_Object opaque)
|
|
|
5833 {
|
|
|
5834 Dynarr_free (get_opaque_ptr (opaque));
|
|
|
5835 free_opaque_ptr (opaque);
|
|
|
5836 return Qnil;
|
|
|
5837 }
|
|
|
5838
|
|
|
5839 int
|
|
|
5840 record_unwind_protect_freeing_dynarr (void *ptr)
|
|
|
5841 {
|
|
|
5842 Lisp_Object opaque = make_opaque_ptr (ptr);
|
|
|
5843 return record_unwind_protect (free_dynarr, opaque);
|
|
|
5844 }
|
|
428
|
5845
|
|
|
5846 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
5847 VALUE is not used, except that, purely as a convenience to the
|
|
771
|
5848 caller, it is protected from garbage-protection and returned. */
|
|
428
|
5849 Lisp_Object
|
|
771
|
5850 unbind_to_1 (int count, Lisp_Object value)
|
|
428
|
5851 {
|
|
|
5852 UNBIND_TO_GCPRO (count, value);
|
|
853
|
5853 check_specbind_stack_sanity ();
|
|
428
|
5854 return value;
|
|
|
5855 }
|
|
|
5856
|
|
|
5857 /* Don't call this directly.
|
|
|
5858 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
5859 void
|
|
|
5860 unbind_to_hairy (int count)
|
|
|
5861 {
|
|
771
|
5862 Lisp_Object oquit;
|
|
428
|
5863
|
|
442
|
5864 ++specpdl_ptr;
|
|
|
5865 ++specpdl_depth_counter;
|
|
|
5866
|
|
771
|
5867 /* Allow QUIT within unwind-protect routines, but defer any existing QUIT
|
|
|
5868 until afterwards. */
|
|
428
|
5869 check_quit (); /* make Vquit_flag accurate */
|
|
771
|
5870 oquit = Vquit_flag;
|
|
428
|
5871 Vquit_flag = Qnil;
|
|
|
5872
|
|
|
5873 while (specpdl_depth_counter != count)
|
|
|
5874 {
|
|
|
5875 --specpdl_ptr;
|
|
|
5876 --specpdl_depth_counter;
|
|
|
5877
|
|
|
5878 if (specpdl_ptr->func != 0)
|
|
|
5879 /* An unwind-protect */
|
|
|
5880 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
5881 else
|
|
|
5882 {
|
|
|
5883 /* We checked symbol for validity when we specbound it,
|
|
|
5884 so only need to call Fset if symbol has magic value. */
|
|
440
|
5885 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
428
|
5886 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
5887 sym->value = specpdl_ptr->old_value;
|
|
|
5888 else
|
|
|
5889 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
5890 }
|
|
|
5891
|
|
|
5892 #if 0 /* martin */
|
|
|
5893 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
5894 /* There should never be anything here for us to remove.
|
|
|
5895 If so, it indicates a logic error in Emacs. Catches
|
|
|
5896 should get removed when a throw or signal occurs, or
|
|
|
5897 when a catch or condition-case exits normally. But
|
|
|
5898 it's too dangerous to just remove this code. --ben */
|
|
|
5899
|
|
|
5900 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
5901 Braino on mly's part? */
|
|
|
5902 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
5903 that catch can't possibly still be valid. */
|
|
|
5904 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
5905 {
|
|
|
5906 catchlist = catchlist->next;
|
|
|
5907 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
5908 }
|
|
|
5909 #endif
|
|
|
5910 #endif
|
|
|
5911 }
|
|
771
|
5912 Vquit_flag = oquit;
|
|
853
|
5913 check_specbind_stack_sanity ();
|
|
428
|
5914 }
|
|
|
5915
|
|
|
5916
|
|
|
5917
|
|
|
5918 /* Get the value of symbol's global binding, even if that binding is
|
|
|
5919 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
5920
|
|
|
5921 Lisp_Object
|
|
|
5922 top_level_value (Lisp_Object symbol)
|
|
|
5923 {
|
|
|
5924 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5925
|
|
|
5926 CHECK_SYMBOL (symbol);
|
|
|
5927 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5928 {
|
|
|
5929 if (EQ (ptr->symbol, symbol))
|
|
|
5930 return ptr->old_value;
|
|
|
5931 }
|
|
|
5932 return XSYMBOL (symbol)->value;
|
|
|
5933 }
|
|
|
5934
|
|
|
5935 #if 0
|
|
|
5936
|
|
|
5937 Lisp_Object
|
|
|
5938 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
5939 {
|
|
|
5940 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5941
|
|
|
5942 CHECK_SYMBOL (symbol);
|
|
|
5943 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5944 {
|
|
|
5945 if (EQ (ptr->symbol, symbol))
|
|
|
5946 {
|
|
|
5947 ptr->old_value = newval;
|
|
|
5948 return newval;
|
|
|
5949 }
|
|
|
5950 }
|
|
|
5951 return Fset (symbol, newval);
|
|
|
5952 }
|
|
|
5953
|
|
|
5954 #endif /* 0 */
|
|
|
5955
|
|
|
5956
|
|
|
5957 /************************************************************************/
|
|
|
5958 /* Backtraces */
|
|
|
5959 /************************************************************************/
|
|
|
5960
|
|
|
5961 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
5962 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
5963 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
5964 */
|
|
|
5965 (level, flag))
|
|
|
5966 {
|
|
|
5967 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5968 REGISTER int i;
|
|
|
5969
|
|
|
5970 CHECK_INT (level);
|
|
|
5971
|
|
|
5972 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
5973 {
|
|
|
5974 backlist = backlist->next;
|
|
|
5975 }
|
|
|
5976
|
|
|
5977 if (backlist)
|
|
|
5978 backlist->debug_on_exit = !NILP (flag);
|
|
|
5979
|
|
|
5980 return flag;
|
|
|
5981 }
|
|
|
5982
|
|
|
5983 static void
|
|
|
5984 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
5985 {
|
|
|
5986 int printing_bindings = 0;
|
|
|
5987
|
|
|
5988 for (; speccount > speclimit; speccount--)
|
|
|
5989 {
|
|
|
5990 if (specpdl[speccount - 1].func == 0
|
|
|
5991 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
5992 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
5993 {
|
|
826
|
5994 write_c_string (stream, !printing_bindings ? " # bind (" : " ");
|
|
428
|
5995 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
5996 printing_bindings = 1;
|
|
|
5997 }
|
|
|
5998 else
|
|
|
5999 {
|
|
826
|
6000 if (printing_bindings) write_c_string (stream, ")\n");
|
|
|
6001 write_c_string (stream, " # (unwind-protect ...)\n");
|
|
428
|
6002 printing_bindings = 0;
|
|
|
6003 }
|
|
|
6004 }
|
|
826
|
6005 if (printing_bindings) write_c_string (stream, ")\n");
|
|
428
|
6006 }
|
|
|
6007
|
|
|
6008 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
6009 Print a trace of Lisp function calls currently active.
|
|
438
|
6010 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
444
|
6011 and defaults to the value of `standard-output'.
|
|
|
6012 Optional second arg DETAILED non-nil means show places where currently
|
|
|
6013 active variable bindings, catches, condition-cases, and
|
|
|
6014 unwind-protects, as well as function calls, were made.
|
|
428
|
6015 */
|
|
|
6016 (stream, detailed))
|
|
|
6017 {
|
|
|
6018 /* This function can GC */
|
|
|
6019 struct backtrace *backlist = backtrace_list;
|
|
|
6020 struct catchtag *catches = catchlist;
|
|
|
6021 int speccount = specpdl_depth();
|
|
|
6022
|
|
|
6023 int old_nl = print_escape_newlines;
|
|
|
6024 int old_pr = print_readably;
|
|
|
6025 Lisp_Object old_level = Vprint_level;
|
|
|
6026 Lisp_Object oiq = Vinhibit_quit;
|
|
|
6027 struct gcpro gcpro1, gcpro2;
|
|
|
6028
|
|
|
6029 /* We can't allow quits in here because that could cause the values
|
|
|
6030 of print_readably and print_escape_newlines to get screwed up.
|
|
|
6031 Normally we would use a record_unwind_protect but that would
|
|
|
6032 screw up the functioning of this function. */
|
|
|
6033 Vinhibit_quit = Qt;
|
|
|
6034
|
|
|
6035 entering_debugger = 0;
|
|
|
6036
|
|
872
|
6037 if (!NILP (detailed))
|
|
|
6038 Vprint_level = make_int (50);
|
|
|
6039 else
|
|
|
6040 Vprint_level = make_int (3);
|
|
428
|
6041 print_readably = 0;
|
|
|
6042 print_escape_newlines = 1;
|
|
|
6043
|
|
|
6044 GCPRO2 (stream, old_level);
|
|
|
6045
|
|
|
6046 if (NILP (stream))
|
|
|
6047 stream = Vstandard_output;
|
|
|
6048 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
6049 stream = Fselected_frame (Qnil);
|
|
|
6050
|
|
|
6051 for (;;)
|
|
|
6052 {
|
|
|
6053 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
6054 {
|
|
|
6055 int catchpdl = catches->pdlcount;
|
|
438
|
6056 if (speccount > catchpdl
|
|
|
6057 && specpdl[catchpdl].func == condition_case_unwind)
|
|
428
|
6058 /* This is a condition-case catchpoint */
|
|
|
6059 catchpdl = catchpdl + 1;
|
|
|
6060
|
|
|
6061 backtrace_specials (speccount, catchpdl, stream);
|
|
|
6062
|
|
|
6063 speccount = catches->pdlcount;
|
|
|
6064 if (catchpdl == speccount)
|
|
|
6065 {
|
|
826
|
6066 write_c_string (stream, " # (catch ");
|
|
428
|
6067 Fprin1 (catches->tag, stream);
|
|
826
|
6068 write_c_string (stream, " ...)\n");
|
|
428
|
6069 }
|
|
|
6070 else
|
|
|
6071 {
|
|
826
|
6072 write_c_string (stream, " # (condition-case ... . ");
|
|
428
|
6073 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
826
|
6074 write_c_string (stream, ")\n");
|
|
428
|
6075 }
|
|
|
6076 catches = catches->next;
|
|
|
6077 }
|
|
|
6078 else if (!backlist)
|
|
|
6079 break;
|
|
|
6080 else
|
|
|
6081 {
|
|
|
6082 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
6083 {
|
|
|
6084 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
6085 speccount = backlist->pdlcount;
|
|
|
6086 }
|
|
826
|
6087 write_c_string (stream, backlist->debug_on_exit ? "* " : " ");
|
|
428
|
6088 if (backlist->nargs == UNEVALLED)
|
|
|
6089 {
|
|
|
6090 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
826
|
6091 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */
|
|
428
|
6092 }
|
|
|
6093 else
|
|
|
6094 {
|
|
|
6095 Lisp_Object tem = *backlist->function;
|
|
|
6096 Fprin1 (tem, stream); /* This can QUIT */
|
|
826
|
6097 write_c_string (stream, "(");
|
|
428
|
6098 if (backlist->nargs == MANY)
|
|
|
6099 {
|
|
|
6100 int i;
|
|
|
6101 Lisp_Object tail = Qnil;
|
|
|
6102 struct gcpro ngcpro1;
|
|
|
6103
|
|
|
6104 NGCPRO1 (tail);
|
|
|
6105 for (tail = *backlist->args, i = 0;
|
|
|
6106 !NILP (tail);
|
|
|
6107 tail = Fcdr (tail), i++)
|
|
|
6108 {
|
|
826
|
6109 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6110 Fprin1 (Fcar (tail), stream);
|
|
|
6111 }
|
|
|
6112 NUNGCPRO;
|
|
|
6113 }
|
|
|
6114 else
|
|
|
6115 {
|
|
|
6116 int i;
|
|
|
6117 for (i = 0; i < backlist->nargs; i++)
|
|
|
6118 {
|
|
826
|
6119 if (!i && EQ (tem, Qbyte_code))
|
|
|
6120 {
|
|
|
6121 write_c_string (stream, "\"...\"");
|
|
|
6122 continue;
|
|
|
6123 }
|
|
|
6124 if (i != 0) write_c_string (stream, " ");
|
|
428
|
6125 Fprin1 (backlist->args[i], stream);
|
|
|
6126 }
|
|
|
6127 }
|
|
826
|
6128 write_c_string (stream, ")\n");
|
|
428
|
6129 }
|
|
|
6130 backlist = backlist->next;
|
|
|
6131 }
|
|
|
6132 }
|
|
|
6133 Vprint_level = old_level;
|
|
|
6134 print_readably = old_pr;
|
|
|
6135 print_escape_newlines = old_nl;
|
|
|
6136 UNGCPRO;
|
|
|
6137 Vinhibit_quit = oiq;
|
|
|
6138 return Qnil;
|
|
|
6139 }
|
|
|
6140
|
|
|
6141
|
|
444
|
6142 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /*
|
|
|
6143 Return the function and arguments NFRAMES up from current execution point.
|
|
428
|
6144 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
6145 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
6146 If that frame has evaluated its arguments and called its function already,
|
|
|
6147 the value is (t FUNCTION ARG-VALUES...).
|
|
|
6148 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
6149 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
6150 or a lambda expression for macro calls.
|
|
444
|
6151 If NFRAMES is more than the number of frames, the value is nil.
|
|
428
|
6152 */
|
|
|
6153 (nframes))
|
|
|
6154 {
|
|
|
6155 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
6156 REGISTER int i;
|
|
|
6157 Lisp_Object tem;
|
|
|
6158
|
|
|
6159 CHECK_NATNUM (nframes);
|
|
|
6160
|
|
|
6161 /* Find the frame requested. */
|
|
|
6162 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
6163 backlist = backlist->next;
|
|
|
6164
|
|
|
6165 if (!backlist)
|
|
|
6166 return Qnil;
|
|
|
6167 if (backlist->nargs == UNEVALLED)
|
|
|
6168 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
6169 else
|
|
|
6170 {
|
|
|
6171 if (backlist->nargs == MANY)
|
|
|
6172 tem = *backlist->args;
|
|
|
6173 else
|
|
|
6174 tem = Flist (backlist->nargs, backlist->args);
|
|
|
6175
|
|
|
6176 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
6177 }
|
|
|
6178 }
|
|
|
6179
|
|
|
6180
|
|
|
6181 /************************************************************************/
|
|
|
6182 /* Warnings */
|
|
|
6183 /************************************************************************/
|
|
|
6184
|
|
|
6185 void
|
|
|
6186 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
6187 Lisp_Object obj)
|
|
|
6188 {
|
|
793
|
6189 /* Don't even generate debug warnings if they're going to be discarded,
|
|
|
6190 to avoid excessive consing. */
|
|
|
6191 if (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) &&
|
|
|
6192 !EQ (Vlog_warning_minimum_level, Qdebug))
|
|
|
6193 return;
|
|
|
6194
|
|
428
|
6195 obj = list1 (list3 (class, level, obj));
|
|
|
6196 if (NILP (Vpending_warnings))
|
|
|
6197 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
6198 else
|
|
|
6199 {
|
|
|
6200 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
6201 Vpending_warnings_tail = obj;
|
|
|
6202 }
|
|
|
6203 }
|
|
|
6204
|
|
|
6205 /* #### This should probably accept Lisp objects; but then we have
|
|
|
6206 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
6207
|
|
|
6208 An alternative approach is to just pass some non-string type of
|
|
|
6209 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
6210 automatically be called when it is safe to do so. */
|
|
|
6211
|
|
|
6212 void
|
|
867
|
6213 warn_when_safe (Lisp_Object class, Lisp_Object level, const CIbyte *fmt, ...)
|
|
428
|
6214 {
|
|
|
6215 Lisp_Object obj;
|
|
|
6216 va_list args;
|
|
|
6217
|
|
793
|
6218 /* Don't even generate debug warnings if they're going to be discarded,
|
|
|
6219 to avoid excessive consing. */
|
|
|
6220 if (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) &&
|
|
|
6221 !EQ (Vlog_warning_minimum_level, Qdebug))
|
|
|
6222 return;
|
|
|
6223
|
|
428
|
6224 va_start (args, fmt);
|
|
771
|
6225 obj = emacs_vsprintf_string (CGETTEXT (fmt), args);
|
|
428
|
6226 va_end (args);
|
|
|
6227
|
|
|
6228 warn_when_safe_lispobj (class, level, obj);
|
|
|
6229 }
|
|
|
6230
|
|
|
6231
|
|
|
6232
|
|
|
6233
|
|
|
6234 /************************************************************************/
|
|
|
6235 /* Initialization */
|
|
|
6236 /************************************************************************/
|
|
|
6237
|
|
|
6238 void
|
|
|
6239 syms_of_eval (void)
|
|
|
6240 {
|
|
442
|
6241 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
6242
|
|
563
|
6243 DEFSYMBOL (Qinhibit_quit);
|
|
|
6244 DEFSYMBOL (Qautoload);
|
|
|
6245 DEFSYMBOL (Qdebug_on_error);
|
|
|
6246 DEFSYMBOL (Qstack_trace_on_error);
|
|
|
6247 DEFSYMBOL (Qdebug_on_signal);
|
|
|
6248 DEFSYMBOL (Qstack_trace_on_signal);
|
|
|
6249 DEFSYMBOL (Qdebugger);
|
|
|
6250 DEFSYMBOL (Qmacro);
|
|
428
|
6251 defsymbol (&Qand_rest, "&rest");
|
|
|
6252 defsymbol (&Qand_optional, "&optional");
|
|
|
6253 /* Note that the process code also uses Qexit */
|
|
563
|
6254 DEFSYMBOL (Qexit);
|
|
|
6255 DEFSYMBOL (Qsetq);
|
|
|
6256 DEFSYMBOL (Qinteractive);
|
|
|
6257 DEFSYMBOL (Qcommandp);
|
|
|
6258 DEFSYMBOL (Qdefun);
|
|
|
6259 DEFSYMBOL (Qprogn);
|
|
|
6260 DEFSYMBOL (Qvalues);
|
|
|
6261 DEFSYMBOL (Qdisplay_warning);
|
|
|
6262 DEFSYMBOL (Qrun_hooks);
|
|
887
|
6263 DEFSYMBOL (Qfinalize_list);
|
|
563
|
6264 DEFSYMBOL (Qif);
|
|
428
|
6265
|
|
|
6266 DEFSUBR (For);
|
|
|
6267 DEFSUBR (Fand);
|
|
|
6268 DEFSUBR (Fif);
|
|
|
6269 DEFSUBR_MACRO (Fwhen);
|
|
|
6270 DEFSUBR_MACRO (Funless);
|
|
|
6271 DEFSUBR (Fcond);
|
|
|
6272 DEFSUBR (Fprogn);
|
|
|
6273 DEFSUBR (Fprog1);
|
|
|
6274 DEFSUBR (Fprog2);
|
|
|
6275 DEFSUBR (Fsetq);
|
|
|
6276 DEFSUBR (Fquote);
|
|
|
6277 DEFSUBR (Ffunction);
|
|
|
6278 DEFSUBR (Fdefun);
|
|
|
6279 DEFSUBR (Fdefmacro);
|
|
|
6280 DEFSUBR (Fdefvar);
|
|
|
6281 DEFSUBR (Fdefconst);
|
|
|
6282 DEFSUBR (Fuser_variable_p);
|
|
|
6283 DEFSUBR (Flet);
|
|
|
6284 DEFSUBR (FletX);
|
|
|
6285 DEFSUBR (Fwhile);
|
|
|
6286 DEFSUBR (Fmacroexpand_internal);
|
|
|
6287 DEFSUBR (Fcatch);
|
|
|
6288 DEFSUBR (Fthrow);
|
|
|
6289 DEFSUBR (Funwind_protect);
|
|
|
6290 DEFSUBR (Fcondition_case);
|
|
|
6291 DEFSUBR (Fcall_with_condition_handler);
|
|
|
6292 DEFSUBR (Fsignal);
|
|
|
6293 DEFSUBR (Finteractive_p);
|
|
|
6294 DEFSUBR (Fcommandp);
|
|
|
6295 DEFSUBR (Fcommand_execute);
|
|
|
6296 DEFSUBR (Fautoload);
|
|
|
6297 DEFSUBR (Feval);
|
|
|
6298 DEFSUBR (Fapply);
|
|
|
6299 DEFSUBR (Ffuncall);
|
|
|
6300 DEFSUBR (Ffunctionp);
|
|
|
6301 DEFSUBR (Ffunction_min_args);
|
|
|
6302 DEFSUBR (Ffunction_max_args);
|
|
|
6303 DEFSUBR (Frun_hooks);
|
|
|
6304 DEFSUBR (Frun_hook_with_args);
|
|
|
6305 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
6306 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
6307 DEFSUBR (Fbacktrace_debug);
|
|
|
6308 DEFSUBR (Fbacktrace);
|
|
|
6309 DEFSUBR (Fbacktrace_frame);
|
|
|
6310 }
|
|
|
6311
|
|
|
6312 void
|
|
814
|
6313 init_eval_semi_early (void)
|
|
428
|
6314 {
|
|
|
6315 specpdl_ptr = specpdl;
|
|
|
6316 specpdl_depth_counter = 0;
|
|
|
6317 catchlist = 0;
|
|
|
6318 Vcondition_handlers = Qnil;
|
|
|
6319 backtrace_list = 0;
|
|
|
6320 Vquit_flag = Qnil;
|
|
|
6321 debug_on_next_call = 0;
|
|
|
6322 lisp_eval_depth = 0;
|
|
|
6323 entering_debugger = 0;
|
|
|
6324 }
|
|
|
6325
|
|
|
6326 void
|
|
|
6327 reinit_vars_of_eval (void)
|
|
|
6328 {
|
|
|
6329 preparing_for_armageddon = 0;
|
|
|
6330 in_warnings = 0;
|
|
|
6331 specpdl_size = 50;
|
|
|
6332 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
6333 /* XEmacs change: increase these values. */
|
|
|
6334 max_specpdl_size = 3000;
|
|
442
|
6335 max_lisp_eval_depth = 1000;
|
|
|
6336 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
6337 throw_level = 0;
|
|
|
6338 #endif
|
|
|
6339 }
|
|
|
6340
|
|
|
6341 void
|
|
|
6342 vars_of_eval (void)
|
|
|
6343 {
|
|
|
6344 reinit_vars_of_eval ();
|
|
|
6345
|
|
|
6346 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
6347 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
6348 */ );
|
|
|
6349
|
|
|
6350 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
6351 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
6352 This limit is to catch infinite recursions for you before they cause
|
|
|
6353 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
6354 You can safely make it considerably larger than its default value,
|
|
|
6355 if that proves inconveniently small.
|
|
|
6356 */ );
|
|
|
6357
|
|
|
6358 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
853
|
6359 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil.
|
|
|
6360 `critical' causes running Lisp code to abort regardless of `inhibit-quit'.
|
|
|
6361 Normally, you do not need to set this value yourself. It is set to
|
|
|
6362 t each time a Control-G is detected, and to `critical' each time a
|
|
|
6363 Shift-Control-G is detected. The XEmacs core C code is littered with
|
|
|
6364 calls to the QUIT; macro, which check the values of `quit-flag' and
|
|
|
6365 `inhibit-quit' and abort (or more accurately, call (signal 'quit)) if
|
|
|
6366 it's correct to do so.
|
|
428
|
6367 */ );
|
|
|
6368 Vquit_flag = Qnil;
|
|
|
6369
|
|
|
6370 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
6371 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
6372 Note that `quit-flag' will still be set by typing C-g,
|
|
|
6373 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
6374 To prevent this happening, set `quit-flag' to nil
|
|
853
|
6375 before making `inhibit-quit' nil.
|
|
|
6376
|
|
|
6377 The value of `inhibit-quit' is ignored if a critical quit is
|
|
|
6378 requested by typing control-shift-G in a window-system frame;
|
|
|
6379 this is explained in more detail in `quit-flag'.
|
|
428
|
6380 */ );
|
|
|
6381 Vinhibit_quit = Qnil;
|
|
|
6382
|
|
|
6383 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
6384 *Non-nil means automatically display a backtrace buffer
|
|
|
6385 after any error that is not handled by a `condition-case'.
|
|
|
6386 If the value is a list, an error only means to display a backtrace
|
|
|
6387 if one of its condition symbols appears in the list.
|
|
|
6388 See also variable `stack-trace-on-signal'.
|
|
|
6389 */ );
|
|
|
6390 Vstack_trace_on_error = Qnil;
|
|
|
6391
|
|
|
6392 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
6393 *Non-nil means automatically display a backtrace buffer
|
|
|
6394 after any error that is signalled, whether or not it is handled by
|
|
|
6395 a `condition-case'.
|
|
|
6396 If the value is a list, an error only means to display a backtrace
|
|
|
6397 if one of its condition symbols appears in the list.
|
|
|
6398 See also variable `stack-trace-on-error'.
|
|
|
6399 */ );
|
|
|
6400 Vstack_trace_on_signal = Qnil;
|
|
|
6401
|
|
|
6402 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
6403 *List of errors for which the debugger should not be called.
|
|
|
6404 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
6405 If any element applies to a given error, that error skips the debugger
|
|
|
6406 and just returns to top level.
|
|
|
6407 This overrides the variable `debug-on-error'.
|
|
|
6408 It does not apply to errors handled by `condition-case'.
|
|
|
6409 */ );
|
|
|
6410 Vdebug_ignored_errors = Qnil;
|
|
|
6411
|
|
|
6412 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
6413 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
6414 The debugger will not be entered if the error is handled by
|
|
|
6415 a `condition-case'.
|
|
|
6416 If the value is a list, an error only means to enter the debugger
|
|
|
6417 if one of its condition symbols appears in the list.
|
|
|
6418 This variable is overridden by `debug-ignored-errors'.
|
|
|
6419 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
771
|
6420 If this variable is set while XEmacs is running noninteractively,
|
|
|
6421 an unhandled error will cause a backtrace to be output and the C
|
|
|
6422 debugger entered using `force-debugging-signal'. This can be very
|
|
|
6423 useful when debugging noninteractive errors in tricky situations,
|
|
|
6424 e.g. makefiles, since you can set this variable using an environment
|
|
|
6425 variable, like this:
|
|
|
6426
|
|
|
6427 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)'
|
|
|
6428 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)'
|
|
428
|
6429 */ );
|
|
|
6430 Vdebug_on_error = Qnil;
|
|
|
6431
|
|
|
6432 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
6433 *Non-nil means enter debugger if an error is signalled.
|
|
|
6434 The debugger will be entered whether or not the error is handled by
|
|
|
6435 a `condition-case'.
|
|
|
6436 If the value is a list, an error only means to enter the debugger
|
|
|
6437 if one of its condition symbols appears in the list.
|
|
|
6438 See also variable `debug-on-quit'.
|
|
|
6439 */ );
|
|
|
6440 Vdebug_on_signal = Qnil;
|
|
|
6441
|
|
|
6442 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
6443 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
6444 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
6445 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
6446 control-shift-G to signal a critical quit.
|
|
|
6447 */ );
|
|
|
6448 debug_on_quit = 0;
|
|
|
6449
|
|
|
6450 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
6451 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
6452 */ );
|
|
|
6453
|
|
|
6454 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
6455 Function to call to invoke debugger.
|
|
|
6456 If due to frame exit, args are `exit' and the value being returned;
|
|
|
6457 this function's value will be returned instead of that.
|
|
|
6458 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
6459 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
6460 If due to `eval' entry, one arg, t.
|
|
|
6461 */ );
|
|
|
6462 Vdebugger = Qnil;
|
|
|
6463
|
|
853
|
6464 staticpro (&Vcatch_everything_tag);
|
|
|
6465 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0);
|
|
|
6466
|
|
428
|
6467 staticpro (&Vpending_warnings);
|
|
|
6468 Vpending_warnings = Qnil;
|
|
452
|
6469 dump_add_root_object (&Vpending_warnings_tail);
|
|
428
|
6470 Vpending_warnings_tail = Qnil;
|
|
|
6471
|
|
793
|
6472 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level);
|
|
|
6473 Vlog_warning_minimum_level = Qinfo;
|
|
|
6474
|
|
428
|
6475 staticpro (&Vautoload_queue);
|
|
|
6476 Vautoload_queue = Qnil;
|
|
|
6477
|
|
|
6478 staticpro (&Vcondition_handlers);
|
|
|
6479
|
|
853
|
6480 staticpro (&Vdeletable_permanent_display_objects);
|
|
|
6481 Vdeletable_permanent_display_objects = Qnil;
|
|
|
6482
|
|
|
6483 staticpro (&Vmodifiable_buffers);
|
|
|
6484 Vmodifiable_buffers = Qnil;
|
|
|
6485
|
|
|
6486 inhibit_flags = 0;
|
|
|
6487 }
|
