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0
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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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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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23
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24 #include <config.h>
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25 #include "lisp.h"
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26
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27 #include "commands.h"
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28 #include "backtrace.h"
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29 #include "bytecode.h"
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30 #include "buffer.h"
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31 #include "console.h"
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32 #include "opaque.h"
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33
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380
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34 #ifdef ERROR_CHECK_GC
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35 int always_gc; /* Debugging hack */
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36 #else
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37 #define always_gc 0
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38 #endif
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39
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0
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40 struct backtrace *backtrace_list;
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41
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380
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42 /* Note: you must always fill in all of the fields in a backtrace structure
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116
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43 before pushing them on the backtrace_list. The profiling code depends
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44 on this. */
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45
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380
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46 #define PUSH_BACKTRACE(bt) do { \
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47 (bt).next = backtrace_list; \
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48 backtrace_list = &(bt); \
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49 } while (0)
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50
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51 #define POP_BACKTRACE(bt) do { \
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52 backtrace_list = (bt).next; \
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53 } while (0)
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54
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55 /* Macros for calling subrs with an argument list whose length is only
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56 known at runtime. See EXFUN and DEFUN for similar hackery. */
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57
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58 #define AV_0(av)
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59 #define AV_1(av) av[0]
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60 #define AV_2(av) AV_1(av), av[1]
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61 #define AV_3(av) AV_2(av), av[2]
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62 #define AV_4(av) AV_3(av), av[3]
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63 #define AV_5(av) AV_4(av), av[4]
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64 #define AV_6(av) AV_5(av), av[5]
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65 #define AV_7(av) AV_6(av), av[6]
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66 #define AV_8(av) AV_7(av), av[7]
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67
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68 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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69 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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70
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71 /* If subrs take more than 8 arguments, more cases need to be added
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72 to this switch. (But wait - don't do it - if you really need
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73 a SUBR with more than 8 arguments, use max_args == MANY.
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74 See the DEFUN macro in lisp.h) */
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75 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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76 void (*PF_fn)() = (void (*)()) (fn); \
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77 Lisp_Object *PF_av = (av); \
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78 switch (ac) \
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79 { \
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80 default: abort(); \
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81 case 0: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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82 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
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83 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
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84 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
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85 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
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86 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
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87 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
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88 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
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89 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
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90 } \
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91 } while (0)
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92
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93 #define FUNCALL_SUBR(rv, subr, av, ac) \
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94 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
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95
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116
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96
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0
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97 /* This is the list of current catches (and also condition-cases).
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98 This is a stack: the most recent catch is at the head of the
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99 list. Catches are created by declaring a 'struct catchtag'
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100 locally, filling the .TAG field in with the tag, and doing
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101 a setjmp() on .JMP. Fthrow() will store the value passed
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102 to it in .VAL and longjmp() back to .JMP, back to the function
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103 that established the catch. This will always be either
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104 internal_catch() (catches established internally or through
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105 `catch') or condition_case_1 (condition-cases established
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106 internally or through `condition-case').
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107
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108 The catchtag also records the current position in the
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109 call stack (stored in BACKTRACE_LIST), the current position
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110 in the specpdl stack (used for variable bindings and
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111 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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112 current position in the GCPRO stack. All of these are
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113 restored by Fthrow().
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114 */
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185
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115
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0
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116 struct catchtag *catchlist;
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117
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118 Lisp_Object Qautoload, Qmacro, Qexit;
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119 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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120 Lisp_Object Vquit_flag, Vinhibit_quit;
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121 Lisp_Object Qand_rest, Qand_optional;
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272
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122 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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123 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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0
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124 Lisp_Object Qdebugger;
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125 Lisp_Object Qinhibit_quit;
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126 Lisp_Object Qrun_hooks;
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127 Lisp_Object Qsetq;
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128 Lisp_Object Qdisplay_warning;
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129 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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380
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130 Lisp_Object Qif;
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0
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131
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132 /* Records whether we want errors to occur. This will be a boolean,
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133 nil (errors OK) or t (no errors). If t, an error will cause a
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134 throw to Qunbound_suspended_errors_tag.
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135
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136 See call_with_suspended_errors(). */
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137 Lisp_Object Vcurrent_error_state;
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138
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139 /* Current warning class when warnings occur, or nil for no warnings.
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140 Only meaningful when Vcurrent_error_state is non-nil.
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141 See call_with_suspended_errors(). */
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142 Lisp_Object Vcurrent_warning_class;
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143
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144 /* Special catch tag used in call_with_suspended_errors(). */
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145 Lisp_Object Qunbound_suspended_errors_tag;
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146
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147 /* Non-nil means we're going down, so we better not run any hooks
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148 or do other non-essential stuff. */
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149 int preparing_for_armageddon;
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150
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151 /* Non-nil means record all fset's and provide's, to be undone
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152 if the file being autoloaded is not fully loaded.
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153 They are recorded by being consed onto the front of Vautoload_queue:
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154 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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155 Lisp_Object Vautoload_queue;
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156
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157 /* Current number of specbindings allocated in specpdl. */
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380
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158 int specpdl_size;
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0
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159
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160 /* Pointer to beginning of specpdl. */
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161 struct specbinding *specpdl;
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162
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163 /* Pointer to first unused element in specpdl. */
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164 struct specbinding *specpdl_ptr;
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165
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380
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166 /* specpdl_ptr - specpdl */
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167 int specpdl_depth_counter;
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0
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168
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169 /* Maximum size allowed for specpdl allocation */
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170 int max_specpdl_size;
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171
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172 /* Depth in Lisp evaluations and function calls. */
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173 int lisp_eval_depth;
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174
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175 /* Maximum allowed depth in Lisp evaluations and function calls. */
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176 int max_lisp_eval_depth;
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177
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178 /* Nonzero means enter debugger before next function call */
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179 static int debug_on_next_call;
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180
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181 /* List of conditions (non-nil atom means all) which cause a backtrace
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182 if an error is handled by the command loop's error handler. */
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183 Lisp_Object Vstack_trace_on_error;
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184
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185 /* List of conditions (non-nil atom means all) which enter the debugger
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186 if an error is handled by the command loop's error handler. */
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187 Lisp_Object Vdebug_on_error;
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188
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163
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189 /* List of conditions and regexps specifying error messages which
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190 do not enter the debugger even if Vdebug_on_error says they should. */
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191 Lisp_Object Vdebug_ignored_errors;
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192
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0
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193 /* List of conditions (non-nil atom means all) which cause a backtrace
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194 if any error is signalled. */
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195 Lisp_Object Vstack_trace_on_signal;
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196
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197 /* List of conditions (non-nil atom means all) which enter the debugger
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198 if any error is signalled. */
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199 Lisp_Object Vdebug_on_signal;
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200
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201 /* Nonzero means enter debugger if a quit signal
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202 is handled by the command loop's error handler.
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203
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204 From lisp, this is a boolean variable and may have the values 0 and 1.
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205 But, eval.c temporarily uses the second bit of this variable to indicate
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206 that a critical_quit is in progress. The second bit is reset immediately
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207 after it is processed in signal_call_debugger(). */
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208 int debug_on_quit;
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209
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210 #if 0 /* FSFmacs */
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211 /* entering_debugger is basically equivalent */
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212 /* The value of num_nonmacro_input_chars as of the last time we
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213 started to enter the debugger. If we decide to enter the debugger
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214 again when this is still equal to num_nonmacro_input_chars, then we
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215 know that the debugger itself has an error, and we should just
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216 signal the error instead of entering an infinite loop of debugger
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217 invocations. */
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218 int when_entered_debugger;
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219 #endif
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220
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221 /* Nonzero means we are trying to enter the debugger.
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185
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222 This is to prevent recursive attempts.
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0
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223 Cleared by the debugger calling Fbacktrace */
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224 static int entering_debugger;
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225
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226 /* Function to call to invoke the debugger */
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227 Lisp_Object Vdebugger;
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228
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229 /* Chain of condition handlers currently in effect.
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230 The elements of this chain are contained in the stack frames
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231 of Fcondition_case and internal_condition_case.
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232 When an error is signaled (by calling Fsignal, below),
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233 this chain is searched for an element that applies.
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234
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235 Each element of this list is one of the following:
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236
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237 A list of a handler function and possibly args to pass to
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238 the function. This is a handler established with
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239 `call-with-condition-handler' (q.v.).
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240
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241 A list whose car is Qunbound and whose cdr is Qt.
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242 This is a special condition-case handler established
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243 by C code with condition_case_1(). All errors are
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244 trapped; the debugger is not invoked even if
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245 `debug-on-error' was set.
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246
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247 A list whose car is Qunbound and whose cdr is Qerror.
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248 This is a special condition-case handler established
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249 by C code with condition_case_1(). It is like Qt
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250 except that the debugger is invoked normally if it is
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251 called for.
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252
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253 A list whose car is Qunbound and whose cdr is a list
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254 of lists (CONDITION-NAME BODY ...) exactly as in
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255 `condition-case'. This is a normal `condition-case'
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256 handler.
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257
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258 Note that in all cases *except* the first, there is a
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259 corresponding catch, whose TAG is the value of
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260 Vcondition_handlers just after the handler data just
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261 described is pushed onto it. The reason is that
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262 `condition-case' handlers need to throw back to the
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263 place where the handler was installed before invoking
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264 it, while `call-with-condition-handler' handlers are
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265 invoked in the environment that `signal' was invoked
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266 in.
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267 */
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268 static Lisp_Object Vcondition_handlers;
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269
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380
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270
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271 #if 0 /* no longer used */
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0
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272 /* Used for error catching purposes by throw_or_bomb_out */
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273 static int throw_level;
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380
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274 #endif /* unused */
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0
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275
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276
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380
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277 /************************************************************************/
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278 /* The subr object type */
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279 /************************************************************************/
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0
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280
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281 static void
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282 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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283 {
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380
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284 Lisp_Subr *subr = XSUBR (obj);
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285 CONST char *header =
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286 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
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287 CONST char *name = subr_name (subr);
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288 CONST char *trailer = subr->prompt ? " (interactive)>" : ">";
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0
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289
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290 if (print_readably)
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380
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291 error ("printing unreadable object %s%s%s", header, name, trailer);
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292
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293 write_c_string (header, printcharfun);
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294 write_c_string (name, printcharfun);
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295 write_c_string (trailer, printcharfun);
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0
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296 }
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297
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272
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298 DEFINE_LRECORD_IMPLEMENTATION ("subr", subr,
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299 this_one_is_unmarkable, print_subr, 0, 0, 0,
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380
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300 Lisp_Subr);
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0
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301
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380
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302 /************************************************************************/
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303 /* Entering the debugger */
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304 /************************************************************************/
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0
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305
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306 /* unwind-protect used by call_debugger() to restore the value of
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380
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307 entering_debugger. (We cannot use specbind() because the
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0
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308 variable is not Lisp-accessible.) */
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309
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310 static Lisp_Object
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311 restore_entering_debugger (Lisp_Object arg)
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312 {
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179
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313 entering_debugger = ! NILP (arg);
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0
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314 return arg;
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315 }
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316
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317 /* Actually call the debugger. ARG is a list of args that will be
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318 passed to the debugger function, as follows;
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319
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320 If due to frame exit, args are `exit' and the value being returned;
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321 this function's value will be returned instead of that.
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322 If due to error, args are `error' and a list of the args to `signal'.
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323 If due to `apply' or `funcall' entry, one arg, `lambda'.
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324 If due to `eval' entry, one arg, t.
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325
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326 */
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327
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328 static Lisp_Object
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329 call_debugger_259 (Lisp_Object arg)
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330 {
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331 return apply1 (Vdebugger, arg);
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332 }
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333
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334 /* Call the debugger, doing some encapsulation. We make sure we have
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380
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335 some room on the eval and specpdl stacks, and bind entering_debugger
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0
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336 to 1 during this call. This is used to trap errors that may occur
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380
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337 when entering the debugger (e.g. the value of `debugger' is invalid),
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0
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338 so that the debugger will not be recursively entered if debug-on-error
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339 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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380
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340 enter the debugger.) entering_debugger gets reset to 0 as soon
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0
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341 as a backtrace is displayed, so that further errors can indeed be
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342 handled normally.
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343
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344 We also establish a catch for 'debugger. If the debugger function
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345 throws to this instead of returning a value, it means that the user
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346 pressed 'c' (pretend like the debugger was never entered). The
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347 function then returns Qunbound. (If the user pressed 'r', for
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348 return a value, then the debugger function returns normally with
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349 this value.)
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350
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351 The difference between 'c' and 'r' is as follows:
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352
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353 debug-on-call:
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354 No difference. The call proceeds as normal.
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355 debug-on-exit:
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356 With 'r', the specified value is returned as the function's
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357 return value. With 'c', the value that would normally be
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358 returned is returned.
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359 signal:
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360 With 'r', the specified value is returned as the return
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361 value of `signal'. (This is the only time that `signal'
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362 can return, instead of making a non-local exit.) With `c',
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363 `signal' will continue looking for handlers as if the
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364 debugger was never entered, and will probably end up
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365 throwing to a handler or to top-level.
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366 */
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367
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368 static Lisp_Object
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369 call_debugger (Lisp_Object arg)
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370 {
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371 int threw;
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372 Lisp_Object val;
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|
|
373 int speccount;
|
|
|
374
|
|
|
375 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
376 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
377 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
378 max_specpdl_size = specpdl_size + 40;
|
|
|
379 debug_on_next_call = 0;
|
|
|
380
|
|
380
|
381 speccount = specpdl_depth();
|
|
185
|
382 record_unwind_protect (restore_entering_debugger,
|
|
0
|
383 (entering_debugger ? Qt : Qnil));
|
|
|
384 entering_debugger = 1;
|
|
|
385 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
386
|
|
185
|
387 return unbind_to (speccount, ((threw)
|
|
179
|
388 ? Qunbound /* Not returning a value */
|
|
|
389 : val));
|
|
0
|
390 }
|
|
|
391
|
|
|
392 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
393 with the appropriate args for this. VAL is the exit value that is
|
|
|
394 about to be returned. */
|
|
|
395
|
|
|
396 static Lisp_Object
|
|
|
397 do_debug_on_exit (Lisp_Object val)
|
|
|
398 {
|
|
|
399 /* This is falsified by call_debugger */
|
|
|
400 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
94
|
401
|
|
173
|
402 return !UNBOUNDP (v) ? v : val;
|
|
0
|
403 }
|
|
|
404
|
|
|
405 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
406 with the appropriate args for this. VAL is either t for a call
|
|
|
407 through `eval' or 'lambda for a call through `funcall'.
|
|
|
408
|
|
|
409 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
410 FUNCALL can be defined as
|
|
|
411
|
|
|
412 (defmacro func (fun &rest args)
|
|
|
413 (cons (eval fun) args))
|
|
|
414
|
|
|
415 and should be treated as such.
|
|
|
416 */
|
|
|
417
|
|
|
418 static void
|
|
|
419 do_debug_on_call (Lisp_Object code)
|
|
|
420 {
|
|
|
421 debug_on_next_call = 0;
|
|
|
422 backtrace_list->debug_on_exit = 1;
|
|
|
423 call_debugger (list1 (code));
|
|
|
424 }
|
|
|
425
|
|
|
426 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
427 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
428 and CONDITIONS is the list of error conditions associated with
|
|
|
429 the error being signalled. This returns non-nil if LIST
|
|
|
430 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
431 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
432 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
433 same as one of the symbols in CONDITIONS.) */
|
|
|
434
|
|
|
435 static int
|
|
|
436 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
437 {
|
|
|
438 if (NILP (list))
|
|
|
439 return 0;
|
|
|
440 if (! CONSP (list))
|
|
|
441 return 1;
|
|
|
442
|
|
|
443 while (CONSP (conditions))
|
|
|
444 {
|
|
|
445 Lisp_Object this, tail;
|
|
|
446 this = XCAR (conditions);
|
|
|
447 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
448 if (EQ (XCAR (tail), this))
|
|
|
449 return 1;
|
|
|
450 conditions = XCDR (conditions);
|
|
|
451 }
|
|
|
452 return 0;
|
|
|
453 }
|
|
|
454
|
|
163
|
455
|
|
|
456 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
457 and described by SIGNAL-DATA, should skip the debugger
|
|
|
458 according to debugger-ignore-errors. */
|
|
|
459
|
|
|
460 static int
|
|
|
461 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
462 {
|
|
167
|
463 /* This function can GC */
|
|
163
|
464 Lisp_Object tail;
|
|
|
465 int first_string = 1;
|
|
173
|
466 Lisp_Object error_message = Qnil;
|
|
163
|
467
|
|
|
468 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
469 {
|
|
|
470 if (STRINGP (XCAR (tail)))
|
|
|
471 {
|
|
|
472 if (first_string)
|
|
|
473 {
|
|
165
|
474 error_message = Ferror_message_string (data);
|
|
163
|
475 first_string = 0;
|
|
|
476 }
|
|
167
|
477 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
163
|
478 return 1;
|
|
|
479 }
|
|
|
480 else
|
|
|
481 {
|
|
|
482 Lisp_Object contail;
|
|
|
483
|
|
|
484 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
167
|
485 if (EQ (XCAR (tail), XCAR (contail)))
|
|
163
|
486 return 1;
|
|
|
487 }
|
|
|
488 }
|
|
|
489
|
|
|
490 return 0;
|
|
|
491 }
|
|
|
492
|
|
0
|
493 /* Actually generate a backtrace on STREAM. */
|
|
|
494
|
|
|
495 static Lisp_Object
|
|
|
496 backtrace_259 (Lisp_Object stream)
|
|
|
497 {
|
|
173
|
498 return Fbacktrace (stream, Qt);
|
|
0
|
499 }
|
|
|
500
|
|
272
|
501 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
0
|
502 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
503 associated with the error being signalled. SIG is the actual error
|
|
|
504 being signalled, and DATA is the associated data (these are exactly
|
|
|
505 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
506 list of error handlers that are to be put in place while the debugger
|
|
|
507 is called. This is generally the remaining handlers that are
|
|
|
508 outside of the innermost handler trapping this error. This way,
|
|
|
509 if the same error occurs inside of the debugger, you usually don't get
|
|
|
510 the debugger entered recursively.
|
|
|
511
|
|
|
512 This function returns Qunbound if it didn't call the debugger or if
|
|
|
513 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
514 debugger was never entered. Otherwise, it returns the value
|
|
|
515 that the user specified with `r'. (Note that much of the time,
|
|
|
516 the user will abort with C-], and we will never have a chance to
|
|
|
517 return anything at all.)
|
|
|
518
|
|
|
519 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
520 and stack-trace-on-signal to control whether we do anything.
|
|
|
521 This is so that debug-on-error doesn't make handled errors
|
|
|
522 cause the debugger to get invoked.
|
|
|
523
|
|
|
524 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
525 those functions aren't done more than once in a single `signal'
|
|
|
526 session. */
|
|
|
527
|
|
|
528 static Lisp_Object
|
|
|
529 signal_call_debugger (Lisp_Object conditions,
|
|
|
530 Lisp_Object sig, Lisp_Object data,
|
|
|
531 Lisp_Object active_handlers,
|
|
|
532 int signal_vars_only,
|
|
|
533 int *stack_trace_displayed,
|
|
|
534 int *debugger_entered)
|
|
|
535 {
|
|
|
536 /* This function can GC */
|
|
|
537 Lisp_Object val = Qunbound;
|
|
|
538 Lisp_Object all_handlers = Vcondition_handlers;
|
|
167
|
539 Lisp_Object temp_data = Qnil;
|
|
380
|
540 int speccount = specpdl_depth();
|
|
167
|
541 struct gcpro gcpro1, gcpro2;
|
|
|
542 GCPRO2 (all_handlers, temp_data);
|
|
0
|
543
|
|
|
544 Vcondition_handlers = active_handlers;
|
|
|
545
|
|
167
|
546 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
163
|
547
|
|
|
548 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
167
|
549 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
550 && !skip_debugger (conditions, temp_data))
|
|
0
|
551 {
|
|
380
|
552 specbind (Qdebug_on_error, Qnil);
|
|
|
553 specbind (Qstack_trace_on_error, Qnil);
|
|
|
554 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
555 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
556
|
|
380
|
557 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
558 backtrace_259,
|
|
|
559 Qnil,
|
|
|
560 Qnil);
|
|
|
561 unbind_to (speccount, Qnil);
|
|
|
562 *stack_trace_displayed = 1;
|
|
|
563 }
|
|
185
|
564
|
|
0
|
565 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
566 && (EQ (sig, Qquit)
|
|
|
567 ? debug_on_quit
|
|
167
|
568 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
569 && !skip_debugger (conditions, temp_data))
|
|
0
|
570 {
|
|
|
571 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
572 specbind (Qdebug_on_error, Qnil);
|
|
|
573 specbind (Qstack_trace_on_error, Qnil);
|
|
|
574 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
575 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
576
|
|
0
|
577 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
578 *debugger_entered = 1;
|
|
|
579 }
|
|
|
580
|
|
|
581 if (!entering_debugger && !*stack_trace_displayed
|
|
|
582 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
583 {
|
|
380
|
584 specbind (Qdebug_on_error, Qnil);
|
|
|
585 specbind (Qstack_trace_on_error, Qnil);
|
|
|
586 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
587 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
588
|
|
380
|
589 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
590 backtrace_259,
|
|
|
591 Qnil,
|
|
|
592 Qnil);
|
|
|
593 unbind_to (speccount, Qnil);
|
|
|
594 *stack_trace_displayed = 1;
|
|
|
595 }
|
|
|
596
|
|
|
597 if (!entering_debugger && !*debugger_entered
|
|
|
598 && (EQ (sig, Qquit)
|
|
|
599 ? debug_on_quit
|
|
|
600 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
601 {
|
|
|
602 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
603 specbind (Qdebug_on_error, Qnil);
|
|
|
604 specbind (Qstack_trace_on_error, Qnil);
|
|
|
605 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
606 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
607
|
|
0
|
608 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
609 *debugger_entered = 1;
|
|
|
610 }
|
|
|
611
|
|
|
612 UNGCPRO;
|
|
|
613 Vcondition_handlers = all_handlers;
|
|
173
|
614 return unbind_to (speccount, val);
|
|
0
|
615 }
|
|
|
616
|
|
|
617
|
|
380
|
618 /************************************************************************/
|
|
|
619 /* The basic special forms */
|
|
|
620 /************************************************************************/
|
|
|
621
|
|
|
622 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
623 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
0
|
624
|
|
20
|
625 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
626 Eval args until one of them yields non-nil, then return that value.
|
|
|
627 The remaining args are not evalled at all.
|
|
|
628 If all args return nil, return nil.
|
|
20
|
629 */
|
|
|
630 (args))
|
|
0
|
631 {
|
|
|
632 /* This function can GC */
|
|
380
|
633 REGISTER Lisp_Object arg, val;
|
|
|
634
|
|
|
635 LIST_LOOP_2 (arg, args)
|
|
0
|
636 {
|
|
380
|
637 if (!NILP (val = Feval (arg)))
|
|
|
638 return val;
|
|
0
|
639 }
|
|
|
640
|
|
272
|
641 return Qnil;
|
|
0
|
642 }
|
|
|
643
|
|
20
|
644 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
645 Eval args until one of them yields nil, then return nil.
|
|
|
646 The remaining args are not evalled at all.
|
|
|
647 If no arg yields nil, return the last arg's value.
|
|
20
|
648 */
|
|
|
649 (args))
|
|
0
|
650 {
|
|
|
651 /* This function can GC */
|
|
380
|
652 REGISTER Lisp_Object arg, val = Qt;
|
|
|
653
|
|
|
654 LIST_LOOP_2 (arg, args)
|
|
0
|
655 {
|
|
380
|
656 if (NILP (val = Feval (arg)))
|
|
|
657 return val;
|
|
0
|
658 }
|
|
|
659
|
|
|
660 return val;
|
|
|
661 }
|
|
|
662
|
|
20
|
663 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
272
|
664 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
0
|
665 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
666 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
667 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
668 */
|
|
272
|
669 (args))
|
|
0
|
670 {
|
|
|
671 /* This function can GC */
|
|
380
|
672 Lisp_Object condition = XCAR (args);
|
|
|
673 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
674 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
675
|
|
|
676 if (!NILP (Feval (condition)))
|
|
|
677 return Feval (then_form);
|
|
272
|
678 else
|
|
380
|
679 return Fprogn (else_forms);
|
|
|
680 }
|
|
|
681
|
|
|
682 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
683 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
684
|
|
|
685 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
686 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
687 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
688 */
|
|
|
689 (int nargs, Lisp_Object *args))
|
|
|
690 {
|
|
|
691 Lisp_Object cond = args[0];
|
|
|
692 Lisp_Object body;
|
|
|
693
|
|
|
694 switch (nargs)
|
|
|
695 {
|
|
|
696 case 1: body = Qnil; break;
|
|
|
697 case 2: body = args[1]; break;
|
|
|
698 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
699 }
|
|
|
700
|
|
|
701 return list3 (Qif, cond, body);
|
|
|
702 }
|
|
|
703
|
|
|
704 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
705 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
706 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
707 */
|
|
|
708 (int nargs, Lisp_Object *args))
|
|
|
709 {
|
|
|
710 Lisp_Object cond = args[0];
|
|
|
711 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
712 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
0
|
713 }
|
|
|
714
|
|
20
|
715 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
716 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
717 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
718 and, if the value is non-nil, this clause succeeds:
|
|
|
719 then the expressions in BODY are evaluated and the last one's
|
|
|
720 value is the value of the cond-form.
|
|
|
721 If no clause succeeds, cond returns nil.
|
|
|
722 If a clause has one element, as in (CONDITION),
|
|
|
723 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
724 */
|
|
|
725 (args))
|
|
0
|
726 {
|
|
|
727 /* This function can GC */
|
|
380
|
728 REGISTER Lisp_Object val, clause;
|
|
|
729
|
|
|
730 LIST_LOOP_2 (clause, args)
|
|
0
|
731 {
|
|
272
|
732 CHECK_CONS (clause);
|
|
380
|
733 if (!NILP (val = Feval (XCAR (clause))))
|
|
0
|
734 {
|
|
380
|
735 if (!NILP (clause = XCDR (clause)))
|
|
272
|
736 {
|
|
380
|
737 CHECK_TRUE_LIST (clause);
|
|
|
738 val = Fprogn (clause);
|
|
272
|
739 }
|
|
|
740 return val;
|
|
0
|
741 }
|
|
|
742 }
|
|
|
743
|
|
272
|
744 return Qnil;
|
|
0
|
745 }
|
|
|
746
|
|
20
|
747 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
272
|
748 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
749 */
|
|
|
750 (args))
|
|
0
|
751 {
|
|
|
752 /* This function can GC */
|
|
380
|
753 /* Caller must provide a true list in ARGS */
|
|
|
754 REGISTER Lisp_Object form, val = Qnil;
|
|
0
|
755 struct gcpro gcpro1;
|
|
|
756
|
|
243
|
757 GCPRO1 (args);
|
|
|
758
|
|
380
|
759 {
|
|
|
760 LIST_LOOP_2 (form, args)
|
|
|
761 val = Feval (form);
|
|
|
762 }
|
|
0
|
763
|
|
|
764 UNGCPRO;
|
|
|
765 return val;
|
|
|
766 }
|
|
|
767
|
|
380
|
768 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
769 Lisp_Object across calls to Feval(). */
|
|
|
770
|
|
20
|
771 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
380
|
772 Similar to `progn', but the value of the first form is returned.
|
|
|
773 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
774 The value of FIRST is saved during evaluation of the remaining args,
|
|
0
|
775 whose values are discarded.
|
|
20
|
776 */
|
|
|
777 (args))
|
|
0
|
778 {
|
|
|
779 /* This function can GC */
|
|
380
|
780 REGISTER Lisp_Object val, form;
|
|
|
781 struct gcpro gcpro1;
|
|
|
782
|
|
|
783 val = Feval (XCAR (args));
|
|
|
784
|
|
|
785 GCPRO1 (val);
|
|
|
786
|
|
|
787 {
|
|
|
788 LIST_LOOP_2 (form, XCDR (args))
|
|
|
789 Feval (form);
|
|
|
790 }
|
|
0
|
791
|
|
|
792 UNGCPRO;
|
|
|
793 return val;
|
|
|
794 }
|
|
|
795
|
|
20
|
796 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
380
|
797 Similar to `progn', but the value of the second form is returned.
|
|
|
798 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
799 The value of SECOND is saved during evaluation of the remaining args,
|
|
0
|
800 whose values are discarded.
|
|
20
|
801 */
|
|
|
802 (args))
|
|
0
|
803 {
|
|
|
804 /* This function can GC */
|
|
380
|
805 REGISTER Lisp_Object val, form, tail;
|
|
|
806 struct gcpro gcpro1;
|
|
|
807
|
|
|
808 Feval (XCAR (args));
|
|
|
809 args = XCDR (args);
|
|
|
810 val = Feval (XCAR (args));
|
|
|
811 args = XCDR (args);
|
|
|
812
|
|
|
813 GCPRO1 (val);
|
|
|
814
|
|
|
815 LIST_LOOP_3 (form, args, tail)
|
|
|
816 Feval (form);
|
|
0
|
817
|
|
|
818 UNGCPRO;
|
|
|
819 return val;
|
|
|
820 }
|
|
|
821
|
|
20
|
822 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
272
|
823 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
824 The value of the last form in BODY is returned.
|
|
|
825 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
826 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
827 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
828 */
|
|
|
829 (args))
|
|
0
|
830 {
|
|
|
831 /* This function can GC */
|
|
380
|
832 Lisp_Object var, tail;
|
|
272
|
833 Lisp_Object varlist = XCAR (args);
|
|
380
|
834 Lisp_Object body = XCDR (args);
|
|
|
835 int speccount = specpdl_depth();
|
|
|
836
|
|
|
837 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
838 {
|
|
380
|
839 Lisp_Object symbol, value, tem;
|
|
|
840 if (SYMBOLP (var))
|
|
|
841 symbol = var, value = Qnil;
|
|
0
|
842 else
|
|
|
843 {
|
|
380
|
844 CHECK_CONS (var);
|
|
|
845 symbol = XCAR (var);
|
|
|
846 tem = XCDR (var);
|
|
|
847 if (NILP (tem))
|
|
|
848 value = Qnil;
|
|
272
|
849 else
|
|
|
850 {
|
|
380
|
851 CHECK_CONS (tem);
|
|
|
852 value = Feval (XCAR (tem));
|
|
|
853 if (!NILP (XCDR (tem)))
|
|
272
|
854 signal_simple_error
|
|
380
|
855 ("`let' bindings can have only one value-form", var);
|
|
272
|
856 }
|
|
0
|
857 }
|
|
380
|
858 specbind (symbol, value);
|
|
0
|
859 }
|
|
380
|
860 return unbind_to (speccount, Fprogn (body));
|
|
0
|
861 }
|
|
|
862
|
|
20
|
863 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
272
|
864 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
865 The value of the last form in BODY is returned.
|
|
|
866 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
867 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
868 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
869 */
|
|
|
870 (args))
|
|
0
|
871 {
|
|
|
872 /* This function can GC */
|
|
380
|
873 Lisp_Object var, tail;
|
|
272
|
874 Lisp_Object varlist = XCAR (args);
|
|
380
|
875 Lisp_Object body = XCDR (args);
|
|
|
876 int speccount = specpdl_depth();
|
|
272
|
877 Lisp_Object *temps;
|
|
380
|
878 int idx;
|
|
|
879 struct gcpro gcpro1;
|
|
0
|
880
|
|
272
|
881 /* Make space to hold the values to give the bound variables. */
|
|
|
882 {
|
|
380
|
883 int varcount;
|
|
|
884 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
272
|
885 temps = alloca_array (Lisp_Object, varcount);
|
|
|
886 }
|
|
0
|
887
|
|
|
888 /* Compute the values and store them in `temps' */
|
|
380
|
889 GCPRO1 (*temps);
|
|
|
890 gcpro1.nvars = 0;
|
|
|
891
|
|
|
892 idx = 0;
|
|
|
893 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
894 {
|
|
380
|
895 Lisp_Object *value = &temps[idx++];
|
|
|
896 if (SYMBOLP (var))
|
|
|
897 *value = Qnil;
|
|
0
|
898 else
|
|
272
|
899 {
|
|
380
|
900 Lisp_Object tem;
|
|
|
901 CHECK_CONS (var);
|
|
|
902 tem = XCDR (var);
|
|
|
903 if (NILP (tem))
|
|
|
904 *value = Qnil;
|
|
272
|
905 else
|
|
|
906 {
|
|
380
|
907 CHECK_CONS (tem);
|
|
|
908 *value = Feval (XCAR (tem));
|
|
|
909 gcpro1.nvars = idx;
|
|
|
910
|
|
|
911 if (!NILP (XCDR (tem)))
|
|
272
|
912 signal_simple_error
|
|
380
|
913 ("`let' bindings can have only one value-form", var);
|
|
272
|
914 }
|
|
|
915 }
|
|
0
|
916 }
|
|
380
|
917
|
|
|
918 idx = 0;
|
|
|
919 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
920 {
|
|
380
|
921 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
0
|
922 }
|
|
|
923
|
|
380
|
924 UNGCPRO;
|
|
|
925
|
|
|
926 return unbind_to (speccount, Fprogn (body));
|
|
0
|
927 }
|
|
|
928
|
|
20
|
929 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
272
|
930 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
0
|
931 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
932 until TEST returns nil.
|
|
20
|
933 */
|
|
243
|
934 (args))
|
|
0
|
935 {
|
|
|
936 /* This function can GC */
|
|
272
|
937 Lisp_Object test = XCAR (args);
|
|
|
938 Lisp_Object body = XCDR (args);
|
|
380
|
939
|
|
|
940 while (!NILP (Feval (test)))
|
|
0
|
941 {
|
|
|
942 QUIT;
|
|
|
943 Fprogn (body);
|
|
|
944 }
|
|
|
945
|
|
|
946 return Qnil;
|
|
|
947 }
|
|
|
948
|
|
20
|
949 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
272
|
950 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
0
|
951 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
952 The values VAL are expressions; they are evaluated.
|
|
|
953 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
954 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
955 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
956 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
957 */
|
|
|
958 (args))
|
|
0
|
959 {
|
|
|
960 /* This function can GC */
|
|
380
|
961 Lisp_Object symbol, tail, val = Qnil;
|
|
|
962 int nargs;
|
|
0
|
963 struct gcpro gcpro1;
|
|
380
|
964
|
|
|
965 GET_LIST_LENGTH (args, nargs);
|
|
|
966
|
|
|
967 if (nargs & 1) /* Odd number of arguments? */
|
|
|
968 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
969
|
|
|
970 GCPRO1 (val);
|
|
|
971
|
|
|
972 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
0
|
973 {
|
|
380
|
974 val = Feval (val);
|
|
|
975 Fset (symbol, val);
|
|
0
|
976 }
|
|
|
977
|
|
|
978 UNGCPRO;
|
|
|
979 return val;
|
|
|
980 }
|
|
185
|
981
|
|
20
|
982 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
983 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
984 */
|
|
|
985 (args))
|
|
0
|
986 {
|
|
272
|
987 return XCAR (args);
|
|
0
|
988 }
|
|
185
|
989
|
|
20
|
990 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
991 Like `quote', but preferred for objects which are functions.
|
|
|
992 In byte compilation, `function' causes its argument to be compiled.
|
|
|
993 `quote' cannot do that.
|
|
20
|
994 */
|
|
|
995 (args))
|
|
0
|
996 {
|
|
272
|
997 return XCAR (args);
|
|
0
|
998 }
|
|
|
999
|
|
|
1000
|
|
380
|
1001 /************************************************************************/
|
|
|
1002 /* Defining functions/variables */
|
|
|
1003 /************************************************************************/
|
|
|
1004 static Lisp_Object
|
|
|
1005 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1006 {
|
|
|
1007 if (purify_flag)
|
|
|
1008 defn = Fpurecopy (defn);
|
|
|
1009 Ffset (name, defn);
|
|
|
1010 LOADHIST_ATTACH (name);
|
|
|
1011 return name;
|
|
|
1012 }
|
|
0
|
1013
|
|
20
|
1014 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
272
|
1015 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
0
|
1016 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1017 See also the function `interactive'.
|
|
20
|
1018 */
|
|
|
1019 (args))
|
|
0
|
1020 {
|
|
|
1021 /* This function can GC */
|
|
380
|
1022 return define_function (XCAR (args),
|
|
|
1023 Fcons (Qlambda, XCDR (args)));
|
|
0
|
1024 }
|
|
|
1025
|
|
20
|
1026 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
272
|
1027 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
0
|
1028 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1029 When the macro is called, as in (NAME ARGS...),
|
|
|
1030 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1031 the list ARGS... as it appears in the expression,
|
|
|
1032 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1033 */
|
|
|
1034 (args))
|
|
0
|
1035 {
|
|
|
1036 /* This function can GC */
|
|
380
|
1037 return define_function (XCAR (args),
|
|
|
1038 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
0
|
1039 }
|
|
|
1040
|
|
20
|
1041 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
272
|
1042 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
0
|
1043 You are not required to define a variable in order to use it,
|
|
|
1044 but the definition can supply documentation and an initial value
|
|
|
1045 in a way that tags can recognize.
|
|
|
1046
|
|
|
1047 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1048 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1049 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1050 void.)
|
|
|
1051 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1052 buffer-local values are not affected.
|
|
|
1053 INITVALUE and DOCSTRING are optional.
|
|
|
1054 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
371
|
1055 This means that M-x set-variable and M-x edit-options recognize it.
|
|
0
|
1056 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1057
|
|
|
1058 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1059 */
|
|
|
1060 (args))
|
|
0
|
1061 {
|
|
|
1062 /* This function can GC */
|
|
272
|
1063 Lisp_Object sym = XCAR (args);
|
|
|
1064
|
|
|
1065 if (!NILP (args = XCDR (args)))
|
|
0
|
1066 {
|
|
272
|
1067 Lisp_Object val = XCAR (args);
|
|
|
1068
|
|
|
1069 if (NILP (Fdefault_boundp (sym)))
|
|
380
|
1070 {
|
|
|
1071 struct gcpro gcpro1;
|
|
|
1072 GCPRO1 (val);
|
|
|
1073 val = Feval (val);
|
|
|
1074 Fset_default (sym, val);
|
|
|
1075 UNGCPRO;
|
|
|
1076 }
|
|
272
|
1077
|
|
|
1078 if (!NILP (args = XCDR (args)))
|
|
|
1079 {
|
|
|
1080 Lisp_Object doc = XCAR (args);
|
|
|
1081 #if 0 /* FSFmacs */
|
|
|
1082 /* #### We should probably do this but it might be dangerous */
|
|
|
1083 if (purify_flag)
|
|
|
1084 doc = Fpurecopy (doc);
|
|
|
1085 Fput (sym, Qvariable_documentation, doc);
|
|
|
1086 #else
|
|
|
1087 pure_put (sym, Qvariable_documentation, doc);
|
|
|
1088 #endif
|
|
|
1089 if (!NILP (args = XCDR (args)))
|
|
|
1090 error ("too many arguments");
|
|
|
1091 }
|
|
0
|
1092 }
|
|
|
1093
|
|
|
1094 #ifdef I18N3
|
|
|
1095 if (!NILP (Vfile_domain))
|
|
|
1096 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1097 #endif
|
|
|
1098
|
|
|
1099 LOADHIST_ATTACH (sym);
|
|
|
1100 return sym;
|
|
|
1101 }
|
|
|
1102
|
|
20
|
1103 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
272
|
1104 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
0
|
1105 variable.
|
|
|
1106 The intent is that programs do not change this value, but users may.
|
|
|
1107 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1108 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1109 buffer-local values are not affected.
|
|
|
1110 DOCSTRING is optional.
|
|
|
1111 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
371
|
1112 This means that M-x set-variable and M-x edit-options recognize it.
|
|
0
|
1113
|
|
|
1114 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1115 normally loaded, since it is useful for users to be able to specify
|
|
|
1116 their own values for such variables before loading the library.
|
|
|
1117 Since `defconst' unconditionally assigns the variable,
|
|
|
1118 it would override the user's choice.
|
|
20
|
1119 */
|
|
|
1120 (args))
|
|
0
|
1121 {
|
|
|
1122 /* This function can GC */
|
|
272
|
1123 Lisp_Object sym = XCAR (args);
|
|
380
|
1124 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1125 struct gcpro gcpro1;
|
|
|
1126
|
|
|
1127 GCPRO1 (val);
|
|
|
1128
|
|
|
1129 Fset_default (sym, val);
|
|
|
1130
|
|
|
1131 UNGCPRO;
|
|
272
|
1132
|
|
|
1133 if (!NILP (args = XCDR (args)))
|
|
|
1134 {
|
|
|
1135 Lisp_Object doc = XCAR (args);
|
|
|
1136 #if 0 /* FSFmacs */
|
|
|
1137 /* #### We should probably do this but it might be dangerous */
|
|
|
1138 if (purify_flag)
|
|
|
1139 doc = Fpurecopy (doc);
|
|
|
1140 Fput (sym, Qvariable_documentation, doc);
|
|
|
1141 #else
|
|
|
1142 pure_put (sym, Qvariable_documentation, doc);
|
|
|
1143 #endif
|
|
|
1144 if (!NILP (args = XCDR (args)))
|
|
|
1145 error ("too many arguments");
|
|
|
1146 }
|
|
0
|
1147
|
|
|
1148 #ifdef I18N3
|
|
|
1149 if (!NILP (Vfile_domain))
|
|
|
1150 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1151 #endif
|
|
|
1152
|
|
|
1153 LOADHIST_ATTACH (sym);
|
|
|
1154 return sym;
|
|
|
1155 }
|
|
|
1156
|
|
20
|
1157 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1158 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1159 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1160 Determined by whether the first character of the documentation
|
|
|
1161 for the variable is `*'.
|
|
20
|
1162 */
|
|
|
1163 (variable))
|
|
0
|
1164 {
|
|
380
|
1165 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1166
|
|
|
1167 return
|
|
|
1168 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1169
|
|
|
1170 ((STRINGP (documentation)) &&
|
|
|
1171 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1172
|
|
|
1173 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1174 (CONSP (documentation)
|
|
0
|
1175 && STRINGP (XCAR (documentation))
|
|
|
1176 && INTP (XCDR (documentation))
|
|
380
|
1177 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1178 Qt : Qnil;
|
|
185
|
1179 }
|
|
0
|
1180
|
|
20
|
1181 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1182 Return result of expanding macros at top level of FORM.
|
|
|
1183 If FORM is not a macro call, it is returned unchanged.
|
|
|
1184 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1185 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1186
|
|
371
|
1187 The second optional arg ENVIRONMENT species an environment of macro
|
|
0
|
1188 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1189 */
|
|
371
|
1190 (form, env))
|
|
0
|
1191 {
|
|
|
1192 /* This function can GC */
|
|
|
1193 /* With cleanups from Hallvard Furuseth. */
|
|
|
1194 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1195
|
|
|
1196 while (1)
|
|
|
1197 {
|
|
|
1198 /* Come back here each time we expand a macro call,
|
|
|
1199 in case it expands into another macro call. */
|
|
|
1200 if (!CONSP (form))
|
|
|
1201 break;
|
|
|
1202 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1203 def = sym = XCAR (form);
|
|
|
1204 tem = Qnil;
|
|
|
1205 /* Trace symbols aliases to other symbols
|
|
|
1206 until we get a symbol that is not an alias. */
|
|
|
1207 while (SYMBOLP (def))
|
|
|
1208 {
|
|
|
1209 QUIT;
|
|
|
1210 sym = def;
|
|
371
|
1211 tem = Fassq (sym, env);
|
|
0
|
1212 if (NILP (tem))
|
|
|
1213 {
|
|
|
1214 def = XSYMBOL (sym)->function;
|
|
|
1215 if (!UNBOUNDP (def))
|
|
|
1216 continue;
|
|
|
1217 }
|
|
|
1218 break;
|
|
|
1219 }
|
|
371
|
1220 /* Right now TEM is the result from SYM in ENV,
|
|
0
|
1221 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1222 if (NILP (tem))
|
|
|
1223 {
|
|
371
|
1224 /* SYM is not mentioned in ENV.
|
|
0
|
1225 Look at its function definition. */
|
|
|
1226 if (UNBOUNDP (def)
|
|
|
1227 || !CONSP (def))
|
|
|
1228 /* Not defined or definition not suitable */
|
|
|
1229 break;
|
|
|
1230 if (EQ (XCAR (def), Qautoload))
|
|
|
1231 {
|
|
|
1232 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1233 tem = Felt (def, make_int (4));
|
|
|
1234 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1235 {
|
|
|
1236 /* Yes, load it and try again. */
|
|
|
1237 do_autoload (def, sym);
|
|
|
1238 continue;
|
|
|
1239 }
|
|
|
1240 else
|
|
|
1241 break;
|
|
|
1242 }
|
|
|
1243 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1244 break;
|
|
|
1245 else expander = XCDR (def);
|
|
|
1246 }
|
|
|
1247 else
|
|
|
1248 {
|
|
|
1249 expander = XCDR (tem);
|
|
|
1250 if (NILP (expander))
|
|
|
1251 break;
|
|
|
1252 }
|
|
|
1253 form = apply1 (expander, XCDR (form));
|
|
|
1254 }
|
|
|
1255 return form;
|
|
|
1256 }
|
|
|
1257
|
|
|
1258
|
|
380
|
1259 /************************************************************************/
|
|
|
1260 /* Non-local exits */
|
|
|
1261 /************************************************************************/
|
|
0
|
1262
|
|
20
|
1263 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
272
|
1264 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
0
|
1265 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1266 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1267 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1268 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1269 */
|
|
|
1270 (args))
|
|
0
|
1271 {
|
|
|
1272 /* This function can GC */
|
|
380
|
1273 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1274 Lisp_Object body = XCDR (args);
|
|
|
1275 return internal_catch (tag, Fprogn, body, 0);
|
|
0
|
1276 }
|
|
|
1277
|
|
|
1278 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1279 FUNC should return a Lisp_Object.
|
|
|
1280 This is how catches are done from within C code. */
|
|
|
1281
|
|
|
1282 Lisp_Object
|
|
185
|
1283 internal_catch (Lisp_Object tag,
|
|
0
|
1284 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1285 Lisp_Object arg,
|
|
272
|
1286 int * volatile threw)
|
|
0
|
1287 {
|
|
|
1288 /* This structure is made part of the chain `catchlist'. */
|
|
|
1289 struct catchtag c;
|
|
|
1290
|
|
|
1291 /* Fill in the components of c, and put it on the list. */
|
|
|
1292 c.next = catchlist;
|
|
|
1293 c.tag = tag;
|
|
|
1294 c.val = Qnil;
|
|
|
1295 c.backlist = backtrace_list;
|
|
|
1296 #if 0 /* FSFmacs */
|
|
|
1297 /* #### */
|
|
|
1298 c.handlerlist = handlerlist;
|
|
|
1299 #endif
|
|
|
1300 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1301 c.pdlcount = specpdl_depth();
|
|
0
|
1302 #if 0 /* FSFmacs */
|
|
|
1303 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1304 #endif
|
|
|
1305 c.gcpro = gcprolist;
|
|
|
1306 catchlist = &c;
|
|
|
1307
|
|
|
1308 /* Call FUNC. */
|
|
|
1309 if (SETJMP (c.jmp))
|
|
|
1310 {
|
|
|
1311 /* Throw works by a longjmp that comes right here. */
|
|
|
1312 if (threw) *threw = 1;
|
|
173
|
1313 return c.val;
|
|
0
|
1314 }
|
|
|
1315 c.val = (*func) (arg);
|
|
|
1316 if (threw) *threw = 0;
|
|
|
1317 catchlist = c.next;
|
|
173
|
1318 return c.val;
|
|
0
|
1319 }
|
|
|
1320
|
|
|
1321
|
|
|
1322 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1323 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1324
|
|
|
1325 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1326 they choose the catch tag to throw to. A catch tag for a
|
|
|
1327 condition-case form has a TAG of Qnil.
|
|
|
1328
|
|
|
1329 Before each catch is discarded, unbind all special bindings and
|
|
|
1330 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1331 the handler stack as we go, so that the proper handlers are in
|
|
|
1332 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1333 some static info saved in CATCH, and longjmp to the location
|
|
|
1334 specified in the
|
|
|
1335
|
|
|
1336 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1337
|
|
|
1338 static void
|
|
|
1339 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1340 {
|
|
|
1341 #if 0 /* FSFmacs */
|
|
|
1342 /* #### */
|
|
203
|
1343 REGISTER int last_time;
|
|
0
|
1344 #endif
|
|
|
1345
|
|
|
1346 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1347 Before each catch is discarded, unbind all special bindings
|
|
|
1348 and execute all unwind-protect clauses made above that catch.
|
|
|
1349 At the end, restore some static info saved in CATCH,
|
|
|
1350 and longjmp to the location specified.
|
|
|
1351 */
|
|
|
1352
|
|
|
1353 /* Save the value somewhere it will be GC'ed.
|
|
185
|
1354 (Can't overwrite tag slot because an unwind-protect may
|
|
0
|
1355 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1356 c->val = val;
|
|
|
1357
|
|
|
1358 #if 0 /* FSFmacs */
|
|
|
1359 /* Restore the polling-suppression count. */
|
|
|
1360 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1361 #endif
|
|
|
1362
|
|
|
1363 #if 0 /* FSFmacs */
|
|
|
1364 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1365 do
|
|
|
1366 {
|
|
|
1367 last_time = catchlist == c;
|
|
|
1368
|
|
|
1369 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1370 handlers. */
|
|
|
1371 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1372 handlerlist = catchlist->handlerlist;
|
|
|
1373 catchlist = catchlist->next;
|
|
|
1374 }
|
|
|
1375 while (! last_time);
|
|
|
1376 #else /* Actual XEmacs code */
|
|
|
1377 /* Unwind the specpdl stack */
|
|
|
1378 unbind_to (c->pdlcount, Qnil);
|
|
|
1379 catchlist = c->next;
|
|
|
1380 #endif
|
|
|
1381
|
|
|
1382 gcprolist = c->gcpro;
|
|
|
1383 backtrace_list = c->backlist;
|
|
|
1384 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1385
|
|
380
|
1386 #if 0 /* no longer used */
|
|
0
|
1387 throw_level = 0;
|
|
380
|
1388 #endif
|
|
0
|
1389 LONGJMP (c->jmp, 1);
|
|
185
|
1390 }
|
|
0
|
1391
|
|
|
1392 static DOESNT_RETURN
|
|
|
1393 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1394 Lisp_Object sig, Lisp_Object data)
|
|
|
1395 {
|
|
211
|
1396 #if 0
|
|
0
|
1397 /* die if we recurse more than is reasonable */
|
|
|
1398 if (++throw_level > 20)
|
|
|
1399 abort();
|
|
211
|
1400 #endif
|
|
0
|
1401
|
|
|
1402 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1403 "last resort" when there is no handler for this error and
|
|
|
1404 the debugger couldn't be invoked, so we are throwing to
|
|
|
1405 'top-level. If this tag doesn't exist (happens during the
|
|
|
1406 initialization stages) we would get in an infinite recursive
|
|
|
1407 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1408 really-early-error-handler.
|
|
|
1409
|
|
|
1410 Note that in fact the only time that the "last resort"
|
|
|
1411 occurs is when there's no catch for 'top-level -- the
|
|
|
1412 'top-level catch and the catch-all error handler are
|
|
|
1413 established at the same time, in initial_command_loop/
|
|
|
1414 top_level_1.
|
|
|
1415
|
|
185
|
1416 #### Fix this horrifitude!
|
|
0
|
1417 */
|
|
185
|
1418
|
|
0
|
1419 while (1)
|
|
|
1420 {
|
|
|
1421 REGISTER struct catchtag *c;
|
|
|
1422
|
|
|
1423 #if 0 /* FSFmacs */
|
|
|
1424 if (!NILP (tag)) /* #### */
|
|
|
1425 #endif
|
|
|
1426 for (c = catchlist; c; c = c->next)
|
|
|
1427 {
|
|
|
1428 if (EQ (c->tag, tag))
|
|
|
1429 unwind_to_catch (c, val);
|
|
|
1430 }
|
|
|
1431 if (!bomb_out_p)
|
|
|
1432 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1433 else
|
|
|
1434 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1435 }
|
|
|
1436
|
|
|
1437 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1438 /* throw_level--; */
|
|
|
1439 /* getting tired of compilation warnings */
|
|
|
1440 /* return Qnil; */
|
|
|
1441 }
|
|
|
1442
|
|
|
1443 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1444 Fthrow() works.
|
|
|
1445
|
|
|
1446 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1447 back to the appropriate condition-case handler after (maybe)
|
|
|
1448 the debugger is entered. In that case, TAG is the value
|
|
|
1449 of Vcondition_handlers that was in place just after the
|
|
|
1450 condition-case handler was set up. The car of this will be
|
|
|
1451 some data referring to the handler: Its car will be Qunbound
|
|
|
1452 (thus, this tag can never be generated by Lisp code), and
|
|
|
1453 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1454 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1455 This works fine because Fthrow() does not care what TAG was
|
|
|
1456 passed to it: it just looks up the catch list for something
|
|
|
1457 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1458 back to the place that established the catch (in this case,
|
|
|
1459 condition_case_1). See below for more info.
|
|
|
1460 */
|
|
|
1461
|
|
20
|
1462 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
272
|
1463 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
0
|
1464 Both TAG and VALUE are evalled.
|
|
20
|
1465 */
|
|
|
1466 (tag, val))
|
|
0
|
1467 {
|
|
|
1468 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1469 return Qnil;
|
|
|
1470 }
|
|
|
1471
|
|
20
|
1472 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1473 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1474 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1475 If BODYFORM completes normally, its value is returned
|
|
|
1476 after executing the UNWINDFORMS.
|
|
|
1477 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1478 */
|
|
|
1479 (args))
|
|
0
|
1480 {
|
|
|
1481 /* This function can GC */
|
|
380
|
1482 int speccount = specpdl_depth();
|
|
0
|
1483
|
|
272
|
1484 record_unwind_protect (Fprogn, XCDR (args));
|
|
380
|
1485 return unbind_to (speccount, Feval (XCAR (args)));
|
|
0
|
1486 }
|
|
|
1487
|
|
|
1488
|
|
380
|
1489 /************************************************************************/
|
|
|
1490 /* Signalling and trapping errors */
|
|
|
1491 /************************************************************************/
|
|
0
|
1492
|
|
|
1493 static Lisp_Object
|
|
|
1494 condition_bind_unwind (Lisp_Object loser)
|
|
|
1495 {
|
|
|
1496 struct Lisp_Cons *victim;
|
|
|
1497 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1498 Lisp_Object tem = XCAR (loser);
|
|
|
1499
|
|
|
1500 while (CONSP (tem))
|
|
|
1501 {
|
|
|
1502 victim = XCONS (tem);
|
|
|
1503 tem = victim->cdr;
|
|
|
1504 free_cons (victim);
|
|
|
1505 }
|
|
|
1506 victim = XCONS (loser);
|
|
|
1507
|
|
|
1508 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1509 Vcondition_handlers = victim->cdr;
|
|
|
1510
|
|
|
1511 free_cons (victim);
|
|
173
|
1512 return Qnil;
|
|
0
|
1513 }
|
|
|
1514
|
|
|
1515 static Lisp_Object
|
|
|
1516 condition_case_unwind (Lisp_Object loser)
|
|
|
1517 {
|
|
|
1518 struct Lisp_Cons *victim;
|
|
|
1519
|
|
|
1520 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1521 victim = XCONS (XCAR (loser));
|
|
|
1522 free_cons (victim);
|
|
|
1523
|
|
|
1524 victim = XCONS (loser);
|
|
|
1525 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1526 Vcondition_handlers = victim->cdr;
|
|
|
1527
|
|
|
1528 free_cons (victim);
|
|
173
|
1529 return Qnil;
|
|
0
|
1530 }
|
|
|
1531
|
|
|
1532 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1533 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1534
|
|
|
1535 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1536 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1537 HANDLERS as something to be caught, the return value of this
|
|
|
1538 function is the return value from BFUN. If such an error does
|
|
|
1539 occur, HFUN is called, and its return value becomes the
|
|
|
1540 return value of condition_case_1(). The second argument passed
|
|
|
1541 to HFUN will always be HARG. The first argument depends on
|
|
|
1542 HANDLERS:
|
|
|
1543
|
|
|
1544 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1545 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1546 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1547 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1548 `debug-on-error' was set.
|
|
|
1549
|
|
|
1550 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1551 debugger is invoked if `debug-on-error' was set.
|
|
|
1552
|
|
|
1553 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1554 exactly as in `condition-case', and errors will be trapped
|
|
|
1555 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1556 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1557 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1558
|
|
|
1559 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1560 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1561 for why), establishes a catch whose tag is this new value of
|
|
|
1562 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1563 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1564 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1565 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1566 jump point we just established, and we in turn just call the
|
|
|
1567 HFUN and return its value.
|
|
|
1568
|
|
|
1569 For a real condition-case, HFUN will always be
|
|
|
1570 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1571 to condition-case. That function just binds VAR to the cons
|
|
|
1572 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1573 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1574 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1575 it had *before* condition_case_1() was called. This maintains
|
|
|
1576 consistency (so that the state of things at exit of
|
|
|
1577 condition_case_1() is the same as at entry), and implies
|
|
|
1578 that the handler can signal the same error again (possibly
|
|
|
1579 after processing of its own), without getting in an infinite
|
|
|
1580 loop. */
|
|
|
1581
|
|
|
1582 Lisp_Object
|
|
|
1583 condition_case_1 (Lisp_Object handlers,
|
|
|
1584 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1585 Lisp_Object barg,
|
|
|
1586 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1587 Lisp_Object harg)
|
|
|
1588 {
|
|
380
|
1589 int speccount = specpdl_depth();
|
|
0
|
1590 struct catchtag c;
|
|
|
1591 struct gcpro gcpro1;
|
|
|
1592
|
|
|
1593 #if 0 /* FSFmacs */
|
|
|
1594 c.tag = Qnil;
|
|
|
1595 #else
|
|
|
1596 /* Do consing now so out-of-memory error happens up front */
|
|
|
1597 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1598 which is known specially by Fsignal.
|
|
|
1599 This is an abomination, but to fix it would require either
|
|
|
1600 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1601 or changing the byte-compiler output (no thanks). */
|
|
|
1602 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1603 Vcondition_handlers);
|
|
|
1604 #endif
|
|
|
1605 c.val = Qnil;
|
|
|
1606 c.backlist = backtrace_list;
|
|
|
1607 #if 0 /* FSFmacs */
|
|
|
1608 /* #### */
|
|
|
1609 c.handlerlist = handlerlist;
|
|
|
1610 #endif
|
|
|
1611 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1612 c.pdlcount = specpdl_depth();
|
|
0
|
1613 #if 0 /* FSFmacs */
|
|
|
1614 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1615 #endif
|
|
|
1616 c.gcpro = gcprolist;
|
|
|
1617 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1618 c.next = catchlist;
|
|
|
1619
|
|
|
1620 if (SETJMP (c.jmp))
|
|
|
1621 {
|
|
|
1622 /* throw does ungcpro, etc */
|
|
173
|
1623 return (*hfun) (c.val, harg);
|
|
0
|
1624 }
|
|
|
1625
|
|
|
1626 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1627
|
|
|
1628 catchlist = &c;
|
|
|
1629 #if 0 /* FSFmacs */
|
|
|
1630 h.handler = handlers;
|
|
|
1631 h.var = Qnil;
|
|
|
1632 h.next = handlerlist;
|
|
|
1633 h.tag = &c;
|
|
|
1634 handlerlist = &h;
|
|
|
1635 #else
|
|
|
1636 Vcondition_handlers = c.tag;
|
|
|
1637 #endif
|
|
|
1638 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1639
|
|
|
1640 c.val = ((*bfun) (barg));
|
|
|
1641
|
|
|
1642 /* The following is *not* true: (ben)
|
|
|
1643
|
|
|
1644 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1645 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1646 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1647 UNGCPRO;
|
|
|
1648 catchlist = c.next;
|
|
|
1649 Vcondition_handlers = XCDR (c.tag);
|
|
|
1650
|
|
173
|
1651 return unbind_to (speccount, c.val);
|
|
0
|
1652 }
|
|
|
1653
|
|
|
1654 static Lisp_Object
|
|
|
1655 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1656 {
|
|
|
1657 /* This function can GC */
|
|
|
1658 #if 0 /* FSFmacs */
|
|
|
1659 if (!NILP (h.var))
|
|
|
1660 specbind (h.var, c.val);
|
|
|
1661 val = Fprogn (Fcdr (h.chosen_clause));
|
|
185
|
1662
|
|
0
|
1663 /* Note that this just undoes the binding of h.var; whoever
|
|
380
|
1664 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
0
|
1665 throwing. */
|
|
|
1666 unbind_to (c.pdlcount, Qnil);
|
|
|
1667 return val;
|
|
|
1668 #else
|
|
|
1669 int speccount;
|
|
|
1670
|
|
380
|
1671 CHECK_TRUE_LIST (val);
|
|
0
|
1672 if (NILP (var))
|
|
380
|
1673 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1674
|
|
|
1675 speccount = specpdl_depth();
|
|
0
|
1676 specbind (var, Fcar (val));
|
|
|
1677 val = Fprogn (Fcdr (val));
|
|
|
1678 return unbind_to (speccount, val);
|
|
|
1679 #endif
|
|
|
1680 }
|
|
|
1681
|
|
|
1682 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1683 condition-case except that it takes three arguments rather
|
|
|
1684 than a single list of arguments. */
|
|
|
1685 Lisp_Object
|
|
272
|
1686 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
0
|
1687 {
|
|
|
1688 /* This function can GC */
|
|
380
|
1689 Lisp_Object handler;
|
|
|
1690
|
|
|
1691 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1692 {
|
|
|
1693 if (NILP (handler))
|
|
|
1694 ;
|
|
|
1695 else if (CONSP (handler))
|
|
|
1696 {
|
|
|
1697 Lisp_Object conditions = XCAR (handler);
|
|
|
1698 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1699 if (SYMBOLP (conditions))
|
|
|
1700 ;
|
|
|
1701 else
|
|
|
1702 {
|
|
|
1703 Lisp_Object condition;
|
|
|
1704 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1705 if (!SYMBOLP (condition))
|
|
|
1706 goto invalid_condition_handler;
|
|
|
1707 }
|
|
|
1708 }
|
|
|
1709 else
|
|
|
1710 {
|
|
|
1711 invalid_condition_handler:
|
|
|
1712 signal_simple_error ("Invalid condition handler", handler);
|
|
|
1713 }
|
|
|
1714 }
|
|
0
|
1715
|
|
|
1716 CHECK_SYMBOL (var);
|
|
|
1717
|
|
185
|
1718 return condition_case_1 (handlers,
|
|
380
|
1719 Feval, bodyform,
|
|
|
1720 run_condition_case_handlers,
|
|
|
1721 var);
|
|
0
|
1722 }
|
|
|
1723
|
|
20
|
1724 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1725 Regain control when an error is signalled.
|
|
|
1726 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
380
|
1727 Executes BODYFORM and returns its value if no error happens.
|
|
0
|
1728 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1729 where the BODY is made of Lisp expressions.
|
|
|
1730
|
|
|
1731 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1732 error's condition names. If an error happens, the first applicable
|
|
|
1733 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1734 all errors, even those without the `error' condition name on them
|
|
272
|
1735 \(e.g. `quit').
|
|
0
|
1736
|
|
|
1737 The car of a handler may be a list of condition names
|
|
|
1738 instead of a single condition name.
|
|
|
1739
|
|
|
1740 When a handler handles an error,
|
|
|
1741 control returns to the condition-case and the handler BODY... is executed
|
|
|
1742 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1743 VAR may be nil; then you do not get access to the signal information.
|
|
|
1744
|
|
|
1745 The value of the last BODY form is returned from the condition-case.
|
|
|
1746 See also the function `signal' for more info.
|
|
|
1747
|
|
|
1748 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1749 and the current catches, condition-cases, and bindings have all been
|
|
|
1750 popped back to the state they were in just before the call to
|
|
|
1751 `condition-case'. This means that resignalling the error from
|
|
|
1752 within the handler will not result in an infinite loop.
|
|
|
1753
|
|
|
1754 If you want to establish an error handler that is called with the
|
|
|
1755 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1756 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1757 */
|
|
70
|
1758 (args))
|
|
0
|
1759 {
|
|
|
1760 /* This function can GC */
|
|
380
|
1761 Lisp_Object var = XCAR (args);
|
|
|
1762 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1763 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1764 return condition_case_3 (bodyform, var, handlers);
|
|
185
|
1765 }
|
|
0
|
1766
|
|
20
|
1767 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1768 Regain control when an error is signalled, without popping the stack.
|
|
|
1769 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1770 This function is similar to `condition-case', but the handler is invoked
|
|
|
1771 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1772 that was current when `signal' was called, rather than when the handler
|
|
|
1773 was established.
|
|
|
1774
|
|
|
1775 HANDLER should be a function of one argument, which is a cons of the args
|
|
272
|
1776 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
0
|
1777 `signal' is called (this differs from `condition-case', which allows
|
|
|
1778 you to specify which errors are trapped). If the handler function
|
|
|
1779 returns, `signal' continues as if the handler were never invoked.
|
|
272
|
1780 \(It continues to look for handlers established earlier than this one,
|
|
0
|
1781 and invokes the standard error-handler if none is found.)
|
|
20
|
1782 */
|
|
272
|
1783 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1784 {
|
|
|
1785 /* This function can GC */
|
|
380
|
1786 int speccount = specpdl_depth();
|
|
0
|
1787 Lisp_Object tem;
|
|
|
1788
|
|
|
1789 /* #### If there were a way to check that args[0] were a function
|
|
|
1790 which accepted one arg, that should be done here ... */
|
|
|
1791
|
|
|
1792 /* (handler-fun . handler-args) */
|
|
380
|
1793 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
0
|
1794 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1795 Vcondition_handlers = tem;
|
|
|
1796
|
|
|
1797 /* Caller should have GC-protected args */
|
|
380
|
1798 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
0
|
1799 }
|
|
|
1800
|
|
|
1801 static int
|
|
|
1802 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1803 {
|
|
|
1804 if (EQ (type, Qt))
|
|
|
1805 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1806 * Use with caution! */
|
|
173
|
1807 return 1;
|
|
380
|
1808
|
|
|
1809 if (SYMBOLP (type))
|
|
|
1810 return !NILP (Fmemq (type, conditions));
|
|
|
1811
|
|
|
1812 for (; CONSP (type); type = XCDR (type))
|
|
|
1813 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1814 return 1;
|
|
|
1815
|
|
|
1816 return 0;
|
|
0
|
1817 }
|
|
|
1818
|
|
|
1819 static Lisp_Object
|
|
|
1820 return_from_signal (Lisp_Object value)
|
|
|
1821 {
|
|
251
|
1822 #if 1
|
|
0
|
1823 /* Most callers are not prepared to handle gc if this
|
|
|
1824 returns. So, since this feature is not very useful,
|
|
|
1825 take it out. */
|
|
|
1826 /* Have called debugger; return value to signaller */
|
|
173
|
1827 return value;
|
|
0
|
1828 #else /* But the reality is that that stinks, because: */
|
|
|
1829 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1830 to be continuable!! */
|
|
|
1831 error ("Returning a value from an error is no longer supported");
|
|
|
1832 #endif
|
|
|
1833 }
|
|
|
1834
|
|
|
1835 extern int in_display;
|
|
|
1836
|
|
|
1837
|
|
380
|
1838 /************************************************************************/
|
|
|
1839 /* the workhorse error-signaling function */
|
|
|
1840 /************************************************************************/
|
|
0
|
1841
|
|
|
1842 /* #### This function has not been synched with FSF. It diverges
|
|
|
1843 significantly. */
|
|
|
1844
|
|
|
1845 static Lisp_Object
|
|
|
1846 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1847 {
|
|
|
1848 /* This function can GC */
|
|
|
1849 struct gcpro gcpro1, gcpro2;
|
|
|
1850 Lisp_Object conditions;
|
|
|
1851 Lisp_Object handlers;
|
|
|
1852 /* signal_call_debugger() could get called more than once
|
|
|
1853 (once when a call-with-condition-handler is about to
|
|
|
1854 be dealt with, and another when a condition-case handler
|
|
|
1855 is about to be invoked). So make sure the debugger and/or
|
|
|
1856 stack trace aren't done more than once. */
|
|
|
1857 int stack_trace_displayed = 0;
|
|
|
1858 int debugger_entered = 0;
|
|
|
1859 GCPRO2 (conditions, handlers);
|
|
|
1860
|
|
|
1861 if (!initialized)
|
|
|
1862 {
|
|
|
1863 /* who knows how much has been initialized? Safest bet is
|
|
|
1864 just to bomb out immediately. */
|
|
|
1865 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1866 abort ();
|
|
|
1867 }
|
|
|
1868
|
|
|
1869 if (gc_in_progress || in_display)
|
|
|
1870 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1871 There is no sensible way to handle errors there. */
|
|
|
1872 abort ();
|
|
|
1873
|
|
|
1874 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1875
|
|
|
1876 for (handlers = Vcondition_handlers;
|
|
|
1877 CONSP (handlers);
|
|
|
1878 handlers = XCDR (handlers))
|
|
|
1879 {
|
|
|
1880 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1881 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1882 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1883
|
|
|
1884 if (!UNBOUNDP (handler_fun))
|
|
|
1885 {
|
|
|
1886 /* call-with-condition-handler */
|
|
|
1887 Lisp_Object tem;
|
|
|
1888 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1889 struct gcpro ngcpro1;
|
|
|
1890 NGCPRO1 (all_handlers);
|
|
|
1891 Vcondition_handlers = outer_handlers;
|
|
|
1892
|
|
|
1893 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1894 outer_handlers, 1,
|
|
|
1895 &stack_trace_displayed,
|
|
|
1896 &debugger_entered);
|
|
|
1897 if (!UNBOUNDP (tem))
|
|
|
1898 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1899
|
|
|
1900 tem = Fcons (sig, data);
|
|
|
1901 if (NILP (handler_data))
|
|
|
1902 tem = call1 (handler_fun, tem);
|
|
|
1903 else
|
|
|
1904 {
|
|
|
1905 /* (This code won't be used (for now?).) */
|
|
|
1906 struct gcpro nngcpro1;
|
|
|
1907 Lisp_Object args[3];
|
|
|
1908 NNGCPRO1 (args[0]);
|
|
|
1909 nngcpro1.nvars = 3;
|
|
|
1910 args[0] = handler_fun;
|
|
|
1911 args[1] = tem;
|
|
|
1912 args[2] = handler_data;
|
|
|
1913 nngcpro1.var = args;
|
|
|
1914 tem = Fapply (3, args);
|
|
|
1915 NNUNGCPRO;
|
|
|
1916 }
|
|
|
1917 NUNGCPRO;
|
|
|
1918 #if 0
|
|
|
1919 if (!EQ (tem, Qsignal))
|
|
173
|
1920 return return_from_signal (tem);
|
|
0
|
1921 #endif
|
|
|
1922 /* If handler didn't throw, try another handler */
|
|
|
1923 Vcondition_handlers = all_handlers;
|
|
|
1924 }
|
|
|
1925
|
|
|
1926 /* It's a condition-case handler */
|
|
|
1927
|
|
185
|
1928 /* t is used by handlers for all conditions, set up by C code.
|
|
0
|
1929 * debugger is not called even if debug_on_error */
|
|
|
1930 else if (EQ (handler_data, Qt))
|
|
|
1931 {
|
|
|
1932 UNGCPRO;
|
|
173
|
1933 return Fthrow (handlers, Fcons (sig, data));
|
|
0
|
1934 }
|
|
|
1935 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1936 addition it invokes the debugger if debug_on_error.
|
|
|
1937 This is normally used for the outer command-loop error
|
|
|
1938 handler. */
|
|
|
1939 else if (EQ (handler_data, Qerror))
|
|
|
1940 {
|
|
|
1941 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1942 outer_handlers, 0,
|
|
|
1943 &stack_trace_displayed,
|
|
|
1944 &debugger_entered);
|
|
|
1945
|
|
|
1946 UNGCPRO;
|
|
|
1947 if (!UNBOUNDP (tem))
|
|
173
|
1948 return return_from_signal (tem);
|
|
0
|
1949
|
|
|
1950 tem = Fcons (sig, data);
|
|
173
|
1951 return Fthrow (handlers, tem);
|
|
0
|
1952 }
|
|
|
1953 else
|
|
|
1954 {
|
|
|
1955 /* handler established by real (Lisp) condition-case */
|
|
|
1956 Lisp_Object h;
|
|
|
1957
|
|
|
1958 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1959 {
|
|
|
1960 Lisp_Object clause = Fcar (h);
|
|
|
1961 Lisp_Object tem = Fcar (clause);
|
|
|
1962
|
|
|
1963 if (condition_type_p (tem, conditions))
|
|
|
1964 {
|
|
|
1965 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1966 outer_handlers, 1,
|
|
|
1967 &stack_trace_displayed,
|
|
|
1968 &debugger_entered);
|
|
|
1969 UNGCPRO;
|
|
|
1970 if (!UNBOUNDP (tem))
|
|
173
|
1971 return return_from_signal (tem);
|
|
0
|
1972
|
|
|
1973 /* Doesn't return */
|
|
|
1974 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
173
|
1975 return Fthrow (handlers, tem);
|
|
0
|
1976 }
|
|
|
1977 }
|
|
|
1978 }
|
|
|
1979 }
|
|
|
1980
|
|
|
1981 /* If no handler is present now, try to run the debugger,
|
|
|
1982 and if that fails, throw to top level.
|
|
|
1983
|
|
|
1984 #### The only time that no handler is present is during
|
|
|
1985 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1986 there is no 'top-level catch. (That's why the
|
|
|
1987 "bomb-out" hack was added.)
|
|
|
1988
|
|
185
|
1989 #### Fix this horrifitude!
|
|
0
|
1990 */
|
|
|
1991 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
1992 &stack_trace_displayed,
|
|
|
1993 &debugger_entered);
|
|
|
1994 UNGCPRO;
|
|
|
1995 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
1996 return Qnil;
|
|
|
1997 }
|
|
|
1998
|
|
|
1999
|
|
|
2000 /****************** Error functions class 1 ******************/
|
|
|
2001
|
|
|
2002 /* Class 1: General functions that signal an error.
|
|
|
2003 These functions take an error type and a list of associated error
|
|
|
2004 data. */
|
|
|
2005
|
|
|
2006 /* The simplest external error function: it would be called
|
|
|
2007 signal_continuable_error() in the terminology below, but it's
|
|
|
2008 Lisp-callable. */
|
|
|
2009
|
|
20
|
2010 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2011 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2012 An error symbol is a symbol defined using `define-error'.
|
|
|
2013 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2014 If the signal is handled, DATA is made available to the handler.
|
|
|
2015 See also the function `signal-error', and the functions to handle errors:
|
|
|
2016 `condition-case' and `call-with-condition-handler'.
|
|
|
2017
|
|
|
2018 Note that this function can return, if the debugger is invoked and the
|
|
|
2019 user invokes the "return from signal" option.
|
|
20
|
2020 */
|
|
|
2021 (error_symbol, data))
|
|
0
|
2022 {
|
|
|
2023 /* Fsignal() is one of these functions that's called all the time
|
|
|
2024 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2025 protect the objects because all sorts of weird stuff could
|
|
|
2026 happen. */
|
|
|
2027
|
|
|
2028 struct gcpro gcpro1;
|
|
|
2029
|
|
|
2030 GCPRO1 (data);
|
|
|
2031 if (!NILP (Vcurrent_error_state))
|
|
|
2032 {
|
|
|
2033 if (!NILP (Vcurrent_warning_class))
|
|
|
2034 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2035 Fcons (error_symbol, data));
|
|
|
2036 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2037 abort (); /* Better not get here! */
|
|
|
2038 }
|
|
|
2039 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2040 }
|
|
|
2041
|
|
|
2042 /* Signal a non-continuable error. */
|
|
|
2043
|
|
|
2044 DOESNT_RETURN
|
|
|
2045 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2046 {
|
|
|
2047 for (;;)
|
|
|
2048 Fsignal (sig, data);
|
|
|
2049 }
|
|
|
2050
|
|
|
2051 static Lisp_Object
|
|
|
2052 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2053 {
|
|
380
|
2054 Lisp_Object val;
|
|
0
|
2055 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
380
|
2056 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2057 kludgy_args + 2, XINT (kludgy_args[1]));
|
|
|
2058 return val;
|
|
0
|
2059 }
|
|
|
2060
|
|
|
2061 static Lisp_Object
|
|
|
2062 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2063 {
|
|
|
2064 Vcurrent_warning_class = warning_class;
|
|
|
2065 return Qnil;
|
|
|
2066 }
|
|
|
2067
|
|
|
2068 static Lisp_Object
|
|
|
2069 restore_current_error_state (Lisp_Object error_state)
|
|
|
2070 {
|
|
|
2071 Vcurrent_error_state = error_state;
|
|
|
2072 return Qnil;
|
|
|
2073 }
|
|
|
2074
|
|
|
2075 /* Many functions would like to do one of three things if an error
|
|
|
2076 occurs:
|
|
|
2077
|
|
|
2078 (1) signal the error, as usual.
|
|
|
2079 (2) silently fail and return some error value.
|
|
|
2080 (3) do as (2) but issue a warning in the process.
|
|
|
2081
|
|
|
2082 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2083 value and calls maybe_signal_error() and other such functions.
|
|
|
2084 This approach is inherently error-prone and broken. A much
|
|
|
2085 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2086 Wrap this around any function in which you might want errors
|
|
|
2087 to not be errors.
|
|
|
2088 */
|
|
|
2089
|
|
|
2090 Lisp_Object
|
|
179
|
2091 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
0
|
2092 Lisp_Object class, Error_behavior errb,
|
|
|
2093 int nargs, ...)
|
|
|
2094 {
|
|
|
2095 va_list vargs;
|
|
|
2096 int speccount;
|
|
|
2097 Lisp_Object kludgy_args[22];
|
|
|
2098 Lisp_Object *args = kludgy_args + 2;
|
|
|
2099 int i;
|
|
|
2100 Lisp_Object no_error;
|
|
|
2101
|
|
|
2102 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2103 assert (!NILP (class));
|
|
|
2104 assert (nargs >= 0 && nargs < 20);
|
|
|
2105
|
|
|
2106 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2107 already trapped, we leave them trapped.)
|
|
|
2108
|
|
|
2109 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2110
|
|
|
2111 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2112 were previously enabled. However, we never change the
|
|
|
2113 warning class from one to another. */
|
|
|
2114 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2115 {
|
|
|
2116 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2117 class = Qnil;
|
|
|
2118 errb = ERROR_ME_NOT;
|
|
|
2119 no_error = Qt;
|
|
|
2120 }
|
|
|
2121 else
|
|
|
2122 no_error = Qnil;
|
|
185
|
2123
|
|
0
|
2124 va_start (vargs, nargs);
|
|
|
2125 for (i = 0; i < nargs; i++)
|
|
|
2126 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2127 va_end (vargs);
|
|
|
2128
|
|
|
2129 /* If error-checking is not disabled, just call the function.
|
|
|
2130 It's important not to override disabled error-checking with
|
|
|
2131 enabled error-checking. */
|
|
185
|
2132
|
|
0
|
2133 if (ERRB_EQ (errb, ERROR_ME))
|
|
380
|
2134 {
|
|
|
2135 Lisp_Object val;
|
|
|
2136 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2137 return val;
|
|
|
2138 }
|
|
|
2139
|
|
|
2140 speccount = specpdl_depth();
|
|
0
|
2141 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2142 {
|
|
|
2143 /* If we're currently calling for no warnings, then make it so.
|
|
|
2144 If we're currently calling for warnings and we weren't
|
|
|
2145 previously, then set our warning class; otherwise, leave
|
|
|
2146 the existing one alone. */
|
|
|
2147 record_unwind_protect (restore_current_warning_class,
|
|
|
2148 Vcurrent_warning_class);
|
|
|
2149 Vcurrent_warning_class = class;
|
|
|
2150 }
|
|
|
2151 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2152 {
|
|
|
2153 record_unwind_protect (restore_current_error_state,
|
|
|
2154 Vcurrent_error_state);
|
|
|
2155 Vcurrent_error_state = no_error;
|
|
|
2156 }
|
|
|
2157
|
|
|
2158 {
|
|
|
2159 int threw;
|
|
|
2160 Lisp_Object the_retval;
|
|
|
2161 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2162 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2163 struct gcpro gcpro1, gcpro2;
|
|
|
2164
|
|
|
2165 GCPRO2 (opaque1, opaque2);
|
|
|
2166 kludgy_args[0] = opaque2;
|
|
|
2167 kludgy_args[1] = make_int (nargs);
|
|
|
2168 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2169 call_with_suspended_errors_1,
|
|
|
2170 opaque1, &threw);
|
|
|
2171 free_opaque_ptr (opaque1);
|
|
|
2172 free_opaque_ptr (opaque2);
|
|
|
2173 UNGCPRO;
|
|
|
2174 /* Use the returned value except in non-local exit, when
|
|
|
2175 RETVAL applies. */
|
|
272
|
2176 /* Some perverse compilers require the perverse cast below. */
|
|
|
2177 return unbind_to (speccount,
|
|
|
2178 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
0
|
2179 }
|
|
|
2180 }
|
|
|
2181
|
|
|
2182 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2183 according to ERRB. CLASS is the class of warning and should
|
|
|
2184 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2185 Qresource, etc.). */
|
|
|
2186
|
|
|
2187 void
|
|
|
2188 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2189 Error_behavior errb)
|
|
|
2190 {
|
|
|
2191 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2192 return;
|
|
|
2193 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2194 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2195 else
|
|
|
2196 for (;;)
|
|
|
2197 Fsignal (sig, data);
|
|
|
2198 }
|
|
|
2199
|
|
|
2200 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2201 according to ERRB. */
|
|
|
2202
|
|
|
2203 Lisp_Object
|
|
|
2204 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2205 Lisp_Object class, Error_behavior errb)
|
|
|
2206 {
|
|
|
2207 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2208 return Qnil;
|
|
|
2209 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2210 {
|
|
|
2211 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2212 return Qnil;
|
|
|
2213 }
|
|
|
2214 else
|
|
|
2215 return Fsignal (sig, data);
|
|
|
2216 }
|
|
|
2217
|
|
|
2218
|
|
|
2219 /****************** Error functions class 2 ******************/
|
|
|
2220
|
|
|
2221 /* Class 2: Printf-like functions that signal an error.
|
|
|
2222 These functions signal an error of type Qerror, whose data
|
|
|
2223 is a single string, created using the arguments. */
|
|
|
2224
|
|
|
2225 /* dump an error message; called like printf */
|
|
|
2226
|
|
|
2227 DOESNT_RETURN
|
|
|
2228 error (CONST char *fmt, ...)
|
|
|
2229 {
|
|
|
2230 Lisp_Object obj;
|
|
|
2231 va_list args;
|
|
|
2232
|
|
|
2233 va_start (args, fmt);
|
|
|
2234 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2235 args);
|
|
|
2236 va_end (args);
|
|
|
2237
|
|
|
2238 /* Fsignal GC-protects its args */
|
|
|
2239 signal_error (Qerror, list1 (obj));
|
|
|
2240 }
|
|
|
2241
|
|
|
2242 void
|
|
|
2243 maybe_error (Lisp_Object class, Error_behavior errb, CONST char *fmt, ...)
|
|
|
2244 {
|
|
|
2245 Lisp_Object obj;
|
|
|
2246 va_list args;
|
|
|
2247
|
|
|
2248 /* Optimization: */
|
|
|
2249 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2250 return;
|
|
|
2251
|
|
|
2252 va_start (args, fmt);
|
|
|
2253 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2254 args);
|
|
|
2255 va_end (args);
|
|
|
2256
|
|
|
2257 /* Fsignal GC-protects its args */
|
|
|
2258 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2259 }
|
|
|
2260
|
|
|
2261 Lisp_Object
|
|
|
2262 continuable_error (CONST char *fmt, ...)
|
|
|
2263 {
|
|
|
2264 Lisp_Object obj;
|
|
|
2265 va_list args;
|
|
|
2266
|
|
|
2267 va_start (args, fmt);
|
|
|
2268 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2269 args);
|
|
|
2270 va_end (args);
|
|
|
2271
|
|
|
2272 /* Fsignal GC-protects its args */
|
|
|
2273 return Fsignal (Qerror, list1 (obj));
|
|
|
2274 }
|
|
|
2275
|
|
|
2276 Lisp_Object
|
|
|
2277 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
|
2278 CONST char *fmt, ...)
|
|
|
2279 {
|
|
|
2280 Lisp_Object obj;
|
|
|
2281 va_list args;
|
|
|
2282
|
|
|
2283 /* Optimization: */
|
|
|
2284 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2285 return Qnil;
|
|
|
2286
|
|
|
2287 va_start (args, fmt);
|
|
|
2288 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2289 args);
|
|
|
2290 va_end (args);
|
|
|
2291
|
|
|
2292 /* Fsignal GC-protects its args */
|
|
|
2293 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2294 }
|
|
|
2295
|
|
|
2296
|
|
|
2297 /****************** Error functions class 3 ******************/
|
|
|
2298
|
|
|
2299 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2300 These functions signal an error of type Qerror, whose data
|
|
|
2301 is two objects, a string and a related Lisp object (usually the object
|
|
|
2302 where the error is occurring). */
|
|
|
2303
|
|
|
2304 DOESNT_RETURN
|
|
|
2305 signal_simple_error (CONST char *reason, Lisp_Object frob)
|
|
|
2306 {
|
|
|
2307 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2308 }
|
|
|
2309
|
|
|
2310 void
|
|
|
2311 maybe_signal_simple_error (CONST char *reason, Lisp_Object frob,
|
|
|
2312 Lisp_Object class, Error_behavior errb)
|
|
|
2313 {
|
|
|
2314 /* Optimization: */
|
|
|
2315 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2316 return;
|
|
|
2317 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2318 class, errb);
|
|
|
2319 }
|
|
|
2320
|
|
|
2321 Lisp_Object
|
|
|
2322 signal_simple_continuable_error (CONST char *reason, Lisp_Object frob)
|
|
|
2323 {
|
|
|
2324 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2325 }
|
|
|
2326
|
|
|
2327 Lisp_Object
|
|
|
2328 maybe_signal_simple_continuable_error (CONST char *reason, Lisp_Object frob,
|
|
|
2329 Lisp_Object class, Error_behavior errb)
|
|
|
2330 {
|
|
|
2331 /* Optimization: */
|
|
|
2332 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2333 return Qnil;
|
|
|
2334 return maybe_signal_continuable_error
|
|
|
2335 (Qerror, list2 (build_translated_string (reason),
|
|
|
2336 frob), class, errb);
|
|
185
|
2337 }
|
|
0
|
2338
|
|
|
2339
|
|
|
2340 /****************** Error functions class 4 ******************/
|
|
|
2341
|
|
|
2342 /* Class 4: Printf-like functions that signal an error.
|
|
|
2343 These functions signal an error of type Qerror, whose data
|
|
|
2344 is a two objects, a string (created using the arguments) and a
|
|
|
2345 Lisp object.
|
|
|
2346 */
|
|
|
2347
|
|
|
2348 DOESNT_RETURN
|
|
|
2349 error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2350 {
|
|
|
2351 Lisp_Object obj;
|
|
|
2352 va_list args;
|
|
|
2353
|
|
|
2354 va_start (args, fmt);
|
|
|
2355 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2356 args);
|
|
|
2357 va_end (args);
|
|
|
2358
|
|
|
2359 /* Fsignal GC-protects its args */
|
|
|
2360 signal_error (Qerror, list2 (obj, frob));
|
|
|
2361 }
|
|
|
2362
|
|
|
2363 void
|
|
|
2364 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2365 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2366 {
|
|
|
2367 Lisp_Object obj;
|
|
|
2368 va_list args;
|
|
|
2369
|
|
|
2370 /* Optimization: */
|
|
|
2371 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2372 return;
|
|
|
2373
|
|
|
2374 va_start (args, fmt);
|
|
|
2375 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2376 args);
|
|
|
2377 va_end (args);
|
|
|
2378
|
|
|
2379 /* Fsignal GC-protects its args */
|
|
|
2380 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2381 }
|
|
|
2382
|
|
|
2383 Lisp_Object
|
|
|
2384 continuable_error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2385 {
|
|
|
2386 Lisp_Object obj;
|
|
|
2387 va_list args;
|
|
|
2388
|
|
|
2389 va_start (args, fmt);
|
|
|
2390 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2391 args);
|
|
|
2392 va_end (args);
|
|
|
2393
|
|
|
2394 /* Fsignal GC-protects its args */
|
|
|
2395 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2396 }
|
|
|
2397
|
|
|
2398 Lisp_Object
|
|
|
2399 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2400 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2401 {
|
|
|
2402 Lisp_Object obj;
|
|
|
2403 va_list args;
|
|
|
2404
|
|
|
2405 /* Optimization: */
|
|
|
2406 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2407 return Qnil;
|
|
|
2408
|
|
|
2409 va_start (args, fmt);
|
|
|
2410 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2411 args);
|
|
|
2412 va_end (args);
|
|
|
2413
|
|
|
2414 /* Fsignal GC-protects its args */
|
|
|
2415 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2416 class, errb);
|
|
|
2417 }
|
|
|
2418
|
|
|
2419
|
|
|
2420 /****************** Error functions class 5 ******************/
|
|
|
2421
|
|
|
2422 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2423 These functions signal an error of type Qerror, whose data
|
|
|
2424 is three objects, a string and two related Lisp objects. */
|
|
|
2425
|
|
|
2426 DOESNT_RETURN
|
|
|
2427 signal_simple_error_2 (CONST char *reason,
|
|
|
2428 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2429 {
|
|
|
2430 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2431 frob1));
|
|
|
2432 }
|
|
|
2433
|
|
|
2434 void
|
|
|
2435 maybe_signal_simple_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2436 Lisp_Object frob1, Lisp_Object class,
|
|
|
2437 Error_behavior errb)
|
|
|
2438 {
|
|
|
2439 /* Optimization: */
|
|
|
2440 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2441 return;
|
|
|
2442 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2443 frob1), class, errb);
|
|
|
2444 }
|
|
|
2445
|
|
|
2446
|
|
|
2447 Lisp_Object
|
|
|
2448 signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2449 Lisp_Object frob1)
|
|
|
2450 {
|
|
|
2451 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2452 frob1));
|
|
|
2453 }
|
|
|
2454
|
|
|
2455 Lisp_Object
|
|
|
2456 maybe_signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2457 Lisp_Object frob1, Lisp_Object class,
|
|
|
2458 Error_behavior errb)
|
|
|
2459 {
|
|
|
2460 /* Optimization: */
|
|
|
2461 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2462 return Qnil;
|
|
|
2463 return maybe_signal_continuable_error
|
|
|
2464 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2465 frob1),
|
|
|
2466 class, errb);
|
|
|
2467 }
|
|
|
2468
|
|
|
2469
|
|
|
2470 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2471 void
|
|
|
2472 signal_quit (void)
|
|
|
2473 {
|
|
|
2474 /* This function can GC */
|
|
|
2475 if (EQ (Vquit_flag, Qcritical))
|
|
|
2476 debug_on_quit |= 2; /* set critical bit. */
|
|
185
|
2477 Vquit_flag = Qnil;
|
|
0
|
2478 /* note that this is continuable. */
|
|
|
2479 Fsignal (Qquit, Qnil);
|
|
|
2480 }
|
|
|
2481
|
|
|
2482
|
|
380
|
2483 /* Used in core lisp functions for efficiency */
|
|
|
2484 void
|
|
|
2485 signal_void_function_error (Lisp_Object function)
|
|
|
2486 {
|
|
|
2487 Fsignal (Qvoid_function, list1 (function));
|
|
|
2488 }
|
|
|
2489
|
|
|
2490 static void
|
|
|
2491 signal_invalid_function_error (Lisp_Object function)
|
|
|
2492 {
|
|
|
2493 Fsignal (Qinvalid_function, list1 (function));
|
|
|
2494 }
|
|
|
2495
|
|
|
2496 static void
|
|
|
2497 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2498 {
|
|
|
2499 Fsignal (Qwrong_number_of_arguments, list2 (function, make_int (nargs)));
|
|
|
2500 }
|
|
|
2501
|
|
|
2502 /* Used in list traversal macros for efficiency. */
|
|
|
2503 void
|
|
|
2504 signal_malformed_list_error (Lisp_Object list)
|
|
|
2505 {
|
|
|
2506 Fsignal (Qmalformed_list, list1 (list));
|
|
|
2507 }
|
|
|
2508
|
|
|
2509 void
|
|
|
2510 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2511 {
|
|
|
2512 Fsignal (Qmalformed_property_list, list1 (list));
|
|
|
2513 }
|
|
|
2514
|
|
|
2515 void
|
|
|
2516 signal_circular_list_error (Lisp_Object list)
|
|
|
2517 {
|
|
|
2518 Fsignal (Qcircular_list, list1 (list));
|
|
|
2519 }
|
|
|
2520
|
|
|
2521 void
|
|
|
2522 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2523 {
|
|
|
2524 Fsignal (Qcircular_property_list, list1 (list));
|
|
|
2525 }
|
|
|
2526
|
|
|
2527 /************************************************************************/
|
|
|
2528 /* User commands */
|
|
|
2529 /************************************************************************/
|
|
0
|
2530
|
|
20
|
2531 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
272
|
2532 Return t if FUNCTION makes provisions for interactive calling.
|
|
0
|
2533 This means it contains a description for how to read arguments to give it.
|
|
|
2534 The value is nil for an invalid function or a symbol with no function
|
|
|
2535 definition.
|
|
|
2536
|
|
|
2537 Interactively callable functions include
|
|
|
2538
|
|
|
2539 -- strings and vectors (treated as keyboard macros)
|
|
|
2540 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2541 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2542 (i.e. the interactive flag)
|
|
|
2543 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2544 value
|
|
|
2545 -- subrs (built-in functions) that are interactively callable
|
|
|
2546
|
|
|
2547 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2548 */
|
|
|
2549 (function))
|
|
0
|
2550 {
|
|
272
|
2551 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2552
|
|
380
|
2553 if (COMPILED_FUNCTIONP (fun))
|
|
|
2554 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2555
|
|
|
2556 /* Lists may represent commands. */
|
|
|
2557 if (CONSP (fun))
|
|
|
2558 {
|
|
|
2559 Lisp_Object funcar = XCAR (fun);
|
|
|
2560 if (EQ (funcar, Qlambda))
|
|
|
2561 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2562 if (EQ (funcar, Qautoload))
|
|
|
2563 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2564 else
|
|
|
2565 return Qnil;
|
|
|
2566 }
|
|
0
|
2567
|
|
|
2568 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2569 interactive spec. */
|
|
|
2570 if (SUBRP (fun))
|
|
149
|
2571 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2572
|
|
0
|
2573 /* Strings and vectors are keyboard macros. */
|
|
|
2574 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2575 return Qt;
|
|
|
2576
|
|
380
|
2577 /* Everything else (including Qunbound) is not a command. */
|
|
|
2578 return Qnil;
|
|
0
|
2579 }
|
|
|
2580
|
|
20
|
2581 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2582 Execute CMD as an editor command.
|
|
|
2583 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2584 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2585 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2586 when reading the arguments.
|
|
20
|
2587 */
|
|
|
2588 (cmd, record, keys))
|
|
0
|
2589 {
|
|
|
2590 /* This function can GC */
|
|
|
2591 Lisp_Object prefixarg;
|
|
|
2592 Lisp_Object final = cmd;
|
|
|
2593 struct backtrace backtrace;
|
|
|
2594 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2595
|
|
|
2596 prefixarg = con->prefix_arg;
|
|
|
2597 con->prefix_arg = Qnil;
|
|
|
2598 Vcurrent_prefix_arg = prefixarg;
|
|
|
2599 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2600
|
|
|
2601 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
310
|
2602 return run_hook (Vdisabled_command_hook);
|
|
0
|
2603
|
|
|
2604 for (;;)
|
|
|
2605 {
|
|
|
2606 final = indirect_function (cmd, 1);
|
|
|
2607 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2608 do_autoload (final, cmd);
|
|
|
2609 else
|
|
|
2610 break;
|
|
|
2611 }
|
|
|
2612
|
|
|
2613 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2614 {
|
|
|
2615 backtrace.function = &Qcall_interactively;
|
|
|
2616 backtrace.args = &cmd;
|
|
|
2617 backtrace.nargs = 1;
|
|
|
2618 backtrace.evalargs = 0;
|
|
380
|
2619 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2620 backtrace.debug_on_exit = 0;
|
|
116
|
2621 PUSH_BACKTRACE (backtrace);
|
|
0
|
2622
|
|
|
2623 final = Fcall_interactively (cmd, record, keys);
|
|
|
2624
|
|
116
|
2625 POP_BACKTRACE (backtrace);
|
|
173
|
2626 return final;
|
|
0
|
2627 }
|
|
|
2628 else if (STRINGP (final) || VECTORP (final))
|
|
|
2629 {
|
|
|
2630 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2631 }
|
|
|
2632 else
|
|
|
2633 {
|
|
|
2634 Fsignal (Qwrong_type_argument,
|
|
|
2635 Fcons (Qcommandp,
|
|
|
2636 ((EQ (cmd, final))
|
|
|
2637 ? list1 (cmd)
|
|
|
2638 : list2 (cmd, final))));
|
|
|
2639 return Qnil;
|
|
|
2640 }
|
|
|
2641 }
|
|
|
2642
|
|
20
|
2643 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2644 Return t if function in which this appears was called interactively.
|
|
|
2645 This means that the function was called with call-interactively (which
|
|
|
2646 includes being called as the binding of a key)
|
|
|
2647 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2648 */
|
|
|
2649 ())
|
|
0
|
2650 {
|
|
|
2651 REGISTER struct backtrace *btp;
|
|
|
2652 REGISTER Lisp_Object fun;
|
|
|
2653
|
|
|
2654 if (!INTERACTIVE)
|
|
|
2655 return Qnil;
|
|
|
2656
|
|
|
2657 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2658 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2659 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2660 compiled function. */
|
|
|
2661 btp = backtrace_list;
|
|
|
2662
|
|
|
2663 #if 0 /* FSFmacs */
|
|
|
2664
|
|
|
2665 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2666 out which one is more correct. */
|
|
|
2667 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2668 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2669 fun = Findirect_function (*btp->function);
|
|
|
2670 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2671 btp = btp->next;
|
|
|
2672
|
|
|
2673 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2674 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2675 definition, this function isn't really being called
|
|
|
2676 interactively, but because that's the way Emacs 18 always builds
|
|
|
2677 byte-compiled functions, we'll accept it for now. */
|
|
|
2678 if (EQ (*btp->function, Qbyte_code))
|
|
|
2679 btp = btp->next;
|
|
|
2680
|
|
|
2681 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2682 looking at several frames for special forms. Skip past them. */
|
|
185
|
2683 while (btp &&
|
|
0
|
2684 btp->nargs == UNEVALLED)
|
|
|
2685 btp = btp->next;
|
|
|
2686
|
|
|
2687 #else
|
|
|
2688
|
|
|
2689 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2690 btp = btp->next;
|
|
|
2691 for (;
|
|
|
2692 btp && (btp->nargs == UNEVALLED
|
|
|
2693 || EQ (*btp->function, Qbyte_code));
|
|
|
2694 btp = btp->next)
|
|
|
2695 {}
|
|
|
2696 /* btp now points at the frame of the innermost function
|
|
|
2697 that DOES eval its args.
|
|
|
2698 If it is a built-in function (such as load or eval-region)
|
|
|
2699 return nil. */
|
|
|
2700 /* Beats me why this is necessary, but it is */
|
|
|
2701 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2702 return Qt;
|
|
|
2703
|
|
|
2704 #endif
|
|
|
2705
|
|
|
2706 fun = Findirect_function (*btp->function);
|
|
|
2707 if (SUBRP (fun))
|
|
|
2708 return Qnil;
|
|
|
2709 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2710 Return t if that function was called interactively. */
|
|
|
2711 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2712 return Qt;
|
|
|
2713 return Qnil;
|
|
|
2714 }
|
|
|
2715
|
|
|
2716
|
|
380
|
2717 /************************************************************************/
|
|
|
2718 /* Autoloading */
|
|
|
2719 /************************************************************************/
|
|
0
|
2720
|
|
20
|
2721 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2722 Define FUNCTION to autoload from FILE.
|
|
|
2723 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2724 Third arg DOCSTRING is documentation for the function.
|
|
|
2725 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2726 Fifth arg TYPE indicates the type of the object:
|
|
|
2727 nil or omitted says FUNCTION is a function,
|
|
|
2728 `keymap' says FUNCTION is really a keymap, and
|
|
|
2729 `macro' or t says FUNCTION is really a macro.
|
|
|
2730 Third through fifth args give info about the real definition.
|
|
|
2731 They default to nil.
|
|
|
2732 If FUNCTION is already defined other than as an autoload,
|
|
|
2733 this does nothing and returns nil.
|
|
20
|
2734 */
|
|
|
2735 (function, file, docstring, interactive, type))
|
|
0
|
2736 {
|
|
|
2737 /* This function can GC */
|
|
|
2738 CHECK_SYMBOL (function);
|
|
|
2739 CHECK_STRING (file);
|
|
|
2740
|
|
|
2741 /* If function is defined and not as an autoload, don't override */
|
|
380
|
2742 {
|
|
|
2743 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
2744 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
2745 return Qnil;
|
|
|
2746 }
|
|
0
|
2747
|
|
|
2748 if (purify_flag)
|
|
|
2749 {
|
|
|
2750 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2751 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2752 }
|
|
|
2753
|
|
185
|
2754 return Ffset (function,
|
|
0
|
2755 Fpurecopy (Fcons (Qautoload, list4 (file,
|
|
|
2756 docstring,
|
|
|
2757 interactive,
|
|
|
2758 type))));
|
|
|
2759 }
|
|
|
2760
|
|
|
2761 Lisp_Object
|
|
|
2762 un_autoload (Lisp_Object oldqueue)
|
|
|
2763 {
|
|
|
2764 /* This function can GC */
|
|
|
2765 REGISTER Lisp_Object queue, first, second;
|
|
|
2766
|
|
|
2767 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2768 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2769 queue = Vautoload_queue;
|
|
|
2770 Vautoload_queue = oldqueue;
|
|
|
2771 while (CONSP (queue))
|
|
|
2772 {
|
|
380
|
2773 first = XCAR (queue);
|
|
0
|
2774 second = Fcdr (first);
|
|
|
2775 first = Fcar (first);
|
|
|
2776 if (NILP (second))
|
|
|
2777 Vfeatures = first;
|
|
|
2778 else
|
|
|
2779 Ffset (first, second);
|
|
|
2780 queue = Fcdr (queue);
|
|
|
2781 }
|
|
|
2782 return Qnil;
|
|
|
2783 }
|
|
|
2784
|
|
|
2785 void
|
|
185
|
2786 do_autoload (Lisp_Object fundef,
|
|
0
|
2787 Lisp_Object funname)
|
|
|
2788 {
|
|
|
2789 /* This function can GC */
|
|
380
|
2790 int speccount = specpdl_depth();
|
|
0
|
2791 Lisp_Object fun = funname;
|
|
|
2792 struct gcpro gcpro1, gcpro2;
|
|
|
2793
|
|
|
2794 CHECK_SYMBOL (funname);
|
|
|
2795 GCPRO2 (fun, funname);
|
|
|
2796
|
|
|
2797 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2798 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2799 Vautoload_queue = Qt;
|
|
380
|
2800 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
0
|
2801
|
|
|
2802 {
|
|
380
|
2803 Lisp_Object queue;
|
|
0
|
2804
|
|
|
2805 /* Save the old autoloads, in case we ever do an unload. */
|
|
380
|
2806 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
2807 {
|
|
|
2808 Lisp_Object first = XCAR (queue);
|
|
|
2809 Lisp_Object second = Fcdr (first);
|
|
|
2810
|
|
|
2811 first = Fcar (first);
|
|
|
2812
|
|
|
2813 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2814 may be an atom if the autoload entry was generated by a defalias
|
|
|
2815 or fset. */
|
|
|
2816 if (CONSP (second))
|
|
|
2817 Fput (first, Qautoload, (XCDR (second)));
|
|
|
2818 }
|
|
0
|
2819 }
|
|
|
2820
|
|
|
2821 /* Once loading finishes, don't undo it. */
|
|
|
2822 Vautoload_queue = Qt;
|
|
|
2823 unbind_to (speccount, Qnil);
|
|
|
2824
|
|
|
2825 fun = indirect_function (fun, 0);
|
|
|
2826
|
|
|
2827 #if 0 /* FSFmacs */
|
|
|
2828 if (!NILP (Fequal (fun, fundef)))
|
|
|
2829 #else
|
|
|
2830 if (UNBOUNDP (fun)
|
|
|
2831 || (CONSP (fun)
|
|
|
2832 && EQ (XCAR (fun), Qautoload)))
|
|
|
2833 #endif
|
|
|
2834 error ("Autoloading failed to define function %s",
|
|
|
2835 string_data (XSYMBOL (funname)->name));
|
|
|
2836 UNGCPRO;
|
|
|
2837 }
|
|
|
2838
|
|
|
2839
|
|
380
|
2840 /************************************************************************/
|
|
|
2841 /* eval, funcall, apply */
|
|
|
2842 /************************************************************************/
|
|
0
|
2843
|
|
185
|
2844 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
0
|
2845 int nargs, Lisp_Object args[]);
|
|
|
2846 static int in_warnings;
|
|
|
2847
|
|
|
2848 static Lisp_Object
|
|
|
2849 in_warnings_restore (Lisp_Object minimus)
|
|
|
2850 {
|
|
|
2851 in_warnings = 0;
|
|
|
2852 return Qnil;
|
|
|
2853 }
|
|
|
2854
|
|
20
|
2855 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2856 Evaluate FORM and return its value.
|
|
20
|
2857 */
|
|
|
2858 (form))
|
|
0
|
2859 {
|
|
|
2860 /* This function can GC */
|
|
|
2861 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2862 int nargs;
|
|
|
2863 struct backtrace backtrace;
|
|
|
2864
|
|
|
2865 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2866 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2867 {
|
|
|
2868 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
380
|
2869 int speccount = specpdl_depth();
|
|
0
|
2870 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2871
|
|
|
2872 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2873 in_warnings = 1;
|
|
|
2874 this_warning_cons = Vpending_warnings;
|
|
|
2875 this_warning = XCAR (this_warning_cons);
|
|
|
2876 /* in case an error occurs in the warn function, at least
|
|
|
2877 it won't happen infinitely */
|
|
|
2878 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2879 free_cons (XCONS (this_warning_cons));
|
|
|
2880 class = XCAR (this_warning);
|
|
|
2881 level = XCAR (XCDR (this_warning));
|
|
|
2882 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2883 free_list (this_warning);
|
|
185
|
2884
|
|
0
|
2885 if (NILP (Vpending_warnings))
|
|
|
2886 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2887 but safer */
|
|
|
2888
|
|
|
2889 GCPRO4 (form, class, level, messij);
|
|
|
2890 if (!STRINGP (messij))
|
|
|
2891 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2892 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2893 UNGCPRO;
|
|
|
2894 unbind_to (speccount, Qnil);
|
|
|
2895 }
|
|
|
2896
|
|
|
2897 if (!CONSP (form))
|
|
380
|
2898 {
|
|
|
2899 if (SYMBOLP (form))
|
|
|
2900 return Fsymbol_value (form);
|
|
|
2901 else
|
|
|
2902 return form;
|
|
|
2903 }
|
|
0
|
2904
|
|
|
2905 QUIT;
|
|
|
2906 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2907 {
|
|
|
2908 struct gcpro gcpro1;
|
|
|
2909 GCPRO1 (form);
|
|
|
2910 garbage_collect_1 ();
|
|
|
2911 UNGCPRO;
|
|
|
2912 }
|
|
|
2913
|
|
|
2914 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2915 {
|
|
|
2916 if (max_lisp_eval_depth < 100)
|
|
|
2917 max_lisp_eval_depth = 100;
|
|
|
2918 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2919 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2920 }
|
|
|
2921
|
|
380
|
2922 /* We guaranteed CONSP (form) above */
|
|
|
2923 original_fun = XCAR (form);
|
|
195
|
2924 original_args = XCDR (form);
|
|
|
2925
|
|
380
|
2926 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
2927
|
|
|
2928 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2929 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2930 backtrace.args = &original_args;
|
|
|
2931 backtrace.nargs = UNEVALLED;
|
|
|
2932 backtrace.evalargs = 1;
|
|
|
2933 backtrace.debug_on_exit = 0;
|
|
116
|
2934 PUSH_BACKTRACE (backtrace);
|
|
0
|
2935
|
|
|
2936 if (debug_on_next_call)
|
|
|
2937 do_debug_on_call (Qt);
|
|
|
2938
|
|
245
|
2939 if (profiling_active)
|
|
|
2940 profile_increase_call_count (original_fun);
|
|
|
2941
|
|
0
|
2942 /* At this point, only original_fun and original_args
|
|
380
|
2943 have values that will be used below. */
|
|
0
|
2944 retry:
|
|
|
2945 fun = indirect_function (original_fun, 1);
|
|
|
2946
|
|
|
2947 if (SUBRP (fun))
|
|
|
2948 {
|
|
380
|
2949 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
2950 int max_args = subr->max_args;
|
|
380
|
2951
|
|
|
2952 if (nargs < subr->min_args)
|
|
|
2953 goto wrong_number_of_arguments;
|
|
|
2954
|
|
|
2955 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
0
|
2956 {
|
|
|
2957 backtrace.evalargs = 0;
|
|
380
|
2958 val = (((Lisp_Object (*) (Lisp_Object)) (subr_function (subr)))
|
|
|
2959 (original_args));
|
|
0
|
2960 }
|
|
380
|
2961 else if (nargs <= max_args)
|
|
|
2962 {
|
|
|
2963 struct gcpro gcpro1;
|
|
|
2964 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
2965 REGISTER Lisp_Object *p = args;
|
|
|
2966
|
|
|
2967 GCPRO1 (args[0]);
|
|
|
2968 gcpro1.nvars = 0;
|
|
|
2969
|
|
|
2970 {
|
|
|
2971 REGISTER Lisp_Object arg;
|
|
|
2972 LIST_LOOP_2 (arg, original_args)
|
|
|
2973 {
|
|
|
2974 *p++ = Feval (arg);
|
|
|
2975 gcpro1.nvars++;
|
|
|
2976 }
|
|
|
2977 }
|
|
|
2978
|
|
|
2979 /* &optional args default to nil. */
|
|
|
2980 while (p - args < max_args)
|
|
|
2981 *p++ = Qnil;
|
|
|
2982
|
|
|
2983 backtrace.args = args;
|
|
|
2984 backtrace.nargs = nargs;
|
|
|
2985
|
|
|
2986 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
2987
|
|
|
2988 UNGCPRO;
|
|
|
2989 }
|
|
0
|
2990 else if (max_args == MANY)
|
|
|
2991 {
|
|
|
2992 /* Pass a vector of evaluated arguments */
|
|
380
|
2993 struct gcpro gcpro1;
|
|
|
2994 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
2995 REGISTER Lisp_Object *p = args;
|
|
|
2996
|
|
|
2997 GCPRO1 (args[0]);
|
|
|
2998 gcpro1.nvars = 0;
|
|
|
2999
|
|
|
3000 {
|
|
|
3001 REGISTER Lisp_Object arg;
|
|
|
3002 LIST_LOOP_2 (arg, original_args)
|
|
|
3003 {
|
|
|
3004 *p++ = Feval (arg);
|
|
|
3005 gcpro1.nvars++;
|
|
|
3006 }
|
|
|
3007 }
|
|
|
3008
|
|
|
3009 backtrace.args = args;
|
|
0
|
3010 backtrace.nargs = nargs;
|
|
|
3011
|
|
380
|
3012 val = (((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3013 (nargs, args));
|
|
185
|
3014
|
|
0
|
3015 UNGCPRO;
|
|
380
|
3016 }
|
|
|
3017 else
|
|
|
3018 {
|
|
|
3019 wrong_number_of_arguments:
|
|
|
3020 signal_wrong_number_of_arguments_error (fun, nargs);
|
|
|
3021 }
|
|
0
|
3022 }
|
|
|
3023 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3024 {
|
|
380
|
3025 struct gcpro gcpro1;
|
|
|
3026 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3027 REGISTER Lisp_Object *p = args;
|
|
|
3028
|
|
|
3029 GCPRO1 (args[0]);
|
|
|
3030 gcpro1.nvars = 0;
|
|
|
3031
|
|
|
3032 {
|
|
|
3033 REGISTER Lisp_Object arg;
|
|
|
3034 LIST_LOOP_2 (arg, original_args)
|
|
|
3035 {
|
|
|
3036 *p++ = Feval (arg);
|
|
|
3037 gcpro1.nvars++;
|
|
|
3038 }
|
|
|
3039 }
|
|
|
3040
|
|
|
3041 backtrace.args = args;
|
|
|
3042 backtrace.nargs = nargs;
|
|
|
3043 backtrace.evalargs = 0;
|
|
|
3044
|
|
|
3045 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3046
|
|
|
3047 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3048 if (backtrace.debug_on_exit)
|
|
|
3049 val = do_debug_on_exit (val);
|
|
|
3050 /* Don't do it again when we return to eval. */
|
|
|
3051 backtrace.debug_on_exit = 0;
|
|
|
3052
|
|
|
3053 UNGCPRO;
|
|
|
3054 }
|
|
|
3055 else if (CONSP (fun))
|
|
|
3056 {
|
|
|
3057 Lisp_Object funcar = XCAR (fun);
|
|
|
3058
|
|
0
|
3059 if (EQ (funcar, Qautoload))
|
|
|
3060 {
|
|
|
3061 do_autoload (fun, original_fun);
|
|
|
3062 goto retry;
|
|
|
3063 }
|
|
380
|
3064 else if (EQ (funcar, Qmacro))
|
|
|
3065 {
|
|
|
3066 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3067 }
|
|
0
|
3068 else if (EQ (funcar, Qlambda))
|
|
380
|
3069 {
|
|
|
3070 struct gcpro gcpro1;
|
|
|
3071 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3072 REGISTER Lisp_Object *p = args;
|
|
|
3073
|
|
|
3074 GCPRO1 (args[0]);
|
|
|
3075 gcpro1.nvars = 0;
|
|
|
3076
|
|
|
3077 {
|
|
|
3078 REGISTER Lisp_Object arg;
|
|
|
3079 LIST_LOOP_2 (arg, original_args)
|
|
|
3080 {
|
|
|
3081 *p++ = Feval (arg);
|
|
|
3082 gcpro1.nvars++;
|
|
|
3083 }
|
|
|
3084 }
|
|
|
3085
|
|
|
3086 UNGCPRO;
|
|
|
3087
|
|
|
3088 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3089 backtrace.nargs = nargs;
|
|
|
3090 backtrace.evalargs = 0;
|
|
|
3091
|
|
|
3092 val = funcall_lambda (fun, nargs, args);
|
|
|
3093
|
|
|
3094 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3095 if (backtrace.debug_on_exit)
|
|
|
3096 val = do_debug_on_exit (val);
|
|
|
3097 /* Don't do it again when we return to eval. */
|
|
|
3098 backtrace.debug_on_exit = 0;
|
|
|
3099 }
|
|
0
|
3100 else
|
|
|
3101 {
|
|
380
|
3102 goto invalid_function;
|
|
0
|
3103 }
|
|
|
3104 }
|
|
380
|
3105 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3106 {
|
|
|
3107 invalid_function:
|
|
|
3108 signal_invalid_function_error (fun);
|
|
|
3109 }
|
|
0
|
3110
|
|
|
3111 lisp_eval_depth--;
|
|
|
3112 if (backtrace.debug_on_exit)
|
|
|
3113 val = do_debug_on_exit (val);
|
|
116
|
3114 POP_BACKTRACE (backtrace);
|
|
173
|
3115 return val;
|
|
0
|
3116 }
|
|
|
3117
|
|
|
3118
|
|
380
|
3119 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3120 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3121 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3122 */
|
|
|
3123 (int nargs, Lisp_Object *args))
|
|
0
|
3124 {
|
|
|
3125 /* This function can GC */
|
|
|
3126 Lisp_Object fun;
|
|
|
3127 Lisp_Object val;
|
|
|
3128 struct backtrace backtrace;
|
|
380
|
3129 int fun_nargs = nargs - 1;
|
|
|
3130 Lisp_Object *fun_args = args + 1;
|
|
0
|
3131
|
|
|
3132 QUIT;
|
|
|
3133 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3134 /* Callers should gcpro lexpr args */
|
|
|
3135 garbage_collect_1 ();
|
|
|
3136
|
|
|
3137 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3138 {
|
|
|
3139 if (max_lisp_eval_depth < 100)
|
|
|
3140 max_lisp_eval_depth = 100;
|
|
|
3141 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3142 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3143 }
|
|
|
3144
|
|
380
|
3145 backtrace.pdlcount = specpdl_depth();
|
|
0
|
3146 backtrace.function = &args[0];
|
|
380
|
3147 backtrace.args = fun_args;
|
|
|
3148 backtrace.nargs = fun_nargs;
|
|
0
|
3149 backtrace.evalargs = 0;
|
|
|
3150 backtrace.debug_on_exit = 0;
|
|
116
|
3151 PUSH_BACKTRACE (backtrace);
|
|
0
|
3152
|
|
|
3153 if (debug_on_next_call)
|
|
|
3154 do_debug_on_call (Qlambda);
|
|
|
3155
|
|
|
3156 retry:
|
|
|
3157
|
|
|
3158 fun = args[0];
|
|
|
3159
|
|
241
|
3160 /* It might be useful to place this *after* all the checks. */
|
|
|
3161 if (profiling_active)
|
|
|
3162 profile_increase_call_count (fun);
|
|
|
3163
|
|
380
|
3164 /* We could call indirect_function directly, but profiling shows
|
|
|
3165 this is worth optimizing by partially unrolling the loop. */
|
|
0
|
3166 if (SYMBOLP (fun))
|
|
380
|
3167 {
|
|
|
3168 fun = XSYMBOL (fun)->function;
|
|
|
3169 if (SYMBOLP (fun))
|
|
|
3170 {
|
|
|
3171 fun = XSYMBOL (fun)->function;
|
|
|
3172 if (SYMBOLP (fun))
|
|
|
3173 fun = indirect_function (fun, 1);
|
|
|
3174 }
|
|
|
3175 }
|
|
0
|
3176
|
|
|
3177 if (SUBRP (fun))
|
|
|
3178 {
|
|
380
|
3179 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3180 int max_args = subr->max_args;
|
|
380
|
3181 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3182
|
|
|
3183 if (fun_nargs < subr->min_args)
|
|
|
3184 goto wrong_number_of_arguments;
|
|
|
3185
|
|
|
3186 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
0
|
3187 {
|
|
380
|
3188 funcall_subr:
|
|
|
3189 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
0
|
3190 }
|
|
380
|
3191 else if (fun_nargs < max_args)
|
|
0
|
3192 {
|
|
380
|
3193 Lisp_Object *p = spacious_args;
|
|
0
|
3194
|
|
|
3195 /* Default optionals to nil */
|
|
380
|
3196 while (fun_nargs--)
|
|
|
3197 *p++ = *fun_args++;
|
|
|
3198 while (p - spacious_args < max_args)
|
|
|
3199 *p++ = Qnil;
|
|
|
3200
|
|
|
3201 fun_args = spacious_args;
|
|
|
3202 goto funcall_subr;
|
|
|
3203 }
|
|
|
3204 else if (max_args == MANY)
|
|
|
3205 {
|
|
|
3206 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3207 (fun_nargs, fun_args);
|
|
|
3208 }
|
|
|
3209 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3210 {
|
|
|
3211 goto invalid_function;
|
|
0
|
3212 }
|
|
|
3213 else
|
|
380
|
3214 {
|
|
|
3215 wrong_number_of_arguments:
|
|
|
3216 signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
|
3217 }
|
|
0
|
3218 }
|
|
|
3219 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3220 {
|
|
380
|
3221 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
0
|
3222 }
|
|
380
|
3223 else if (CONSP (fun))
|
|
0
|
3224 {
|
|
195
|
3225 Lisp_Object funcar = XCAR (fun);
|
|
0
|
3226
|
|
|
3227 if (EQ (funcar, Qlambda))
|
|
380
|
3228 {
|
|
|
3229 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3230 }
|
|
0
|
3231 else if (EQ (funcar, Qautoload))
|
|
|
3232 {
|
|
|
3233 do_autoload (fun, args[0]);
|
|
|
3234 goto retry;
|
|
|
3235 }
|
|
380
|
3236 else /* Can't funcall a macro */
|
|
0
|
3237 {
|
|
380
|
3238 goto invalid_function;
|
|
0
|
3239 }
|
|
|
3240 }
|
|
380
|
3241 else if (UNBOUNDP (fun))
|
|
|
3242 {
|
|
|
3243 signal_void_function_error (args[0]);
|
|
|
3244 }
|
|
|
3245 else
|
|
|
3246 {
|
|
|
3247 invalid_function:
|
|
|
3248 signal_invalid_function_error (fun);
|
|
|
3249 }
|
|
|
3250
|
|
0
|
3251 lisp_eval_depth--;
|
|
|
3252 if (backtrace.debug_on_exit)
|
|
|
3253 val = do_debug_on_exit (val);
|
|
116
|
3254 POP_BACKTRACE (backtrace);
|
|
0
|
3255 return val;
|
|
|
3256 }
|
|
|
3257
|
|
380
|
3258 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3259 Return t if OBJECT can be called as a function, else nil.
|
|
|
3260 A function is an object that can be applied to arguments,
|
|
|
3261 using for example `funcall' or `apply'.
|
|
20
|
3262 */
|
|
380
|
3263 (object))
|
|
0
|
3264 {
|
|
380
|
3265 if (SYMBOLP (object))
|
|
|
3266 object = indirect_function (object, 0);
|
|
|
3267
|
|
|
3268 return
|
|
|
3269 (SUBRP (object) ||
|
|
|
3270 COMPILED_FUNCTIONP (object) ||
|
|
|
3271 (CONSP (object) &&
|
|
|
3272 (EQ (XCAR (object), Qlambda) ||
|
|
|
3273 EQ (XCAR (object), Qautoload))))
|
|
|
3274 ? Qt : Qnil;
|
|
0
|
3275 }
|
|
|
3276
|
|
380
|
3277 static Lisp_Object
|
|
|
3278 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
0
|
3279 {
|
|
|
3280 Lisp_Object orig_function = function;
|
|
|
3281 Lisp_Object arglist;
|
|
|
3282
|
|
|
3283 retry:
|
|
|
3284
|
|
|
3285 if (SYMBOLP (function))
|
|
|
3286 function = indirect_function (function, 1);
|
|
|
3287
|
|
|
3288 if (SUBRP (function))
|
|
|
3289 {
|
|
380
|
3290 return function_min_args_p ?
|
|
|
3291 Fsubr_min_args (function):
|
|
|
3292 Fsubr_max_args (function);
|
|
|
3293 }
|
|
|
3294 else if (COMPILED_FUNCTIONP (function))
|
|
|
3295 {
|
|
|
3296 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
0
|
3297 }
|
|
380
|
3298 else if (CONSP (function))
|
|
0
|
3299 {
|
|
272
|
3300 Lisp_Object funcar = XCAR (function);
|
|
0
|
3301
|
|
|
3302 if (EQ (funcar, Qmacro))
|
|
|
3303 {
|
|
272
|
3304 function = XCDR (function);
|
|
0
|
3305 goto retry;
|
|
|
3306 }
|
|
380
|
3307 else if (EQ (funcar, Qautoload))
|
|
0
|
3308 {
|
|
|
3309 do_autoload (function, orig_function);
|
|
|
3310 goto retry;
|
|
|
3311 }
|
|
380
|
3312 else if (EQ (funcar, Qlambda))
|
|
|
3313 {
|
|
|
3314 arglist = Fcar (XCDR (function));
|
|
|
3315 }
|
|
0
|
3316 else
|
|
380
|
3317 {
|
|
|
3318 goto invalid_function;
|
|
|
3319 }
|
|
0
|
3320 }
|
|
|
3321 else
|
|
|
3322 {
|
|
|
3323 invalid_function:
|
|
|
3324 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3325 }
|
|
|
3326
|
|
380
|
3327 {
|
|
|
3328 int argcount = 0;
|
|
|
3329 Lisp_Object arg;
|
|
|
3330
|
|
|
3331 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3332 {
|
|
|
3333 if (EQ (arg, Qand_optional))
|
|
|
3334 {
|
|
|
3335 if (function_min_args_p)
|
|
|
3336 break;
|
|
|
3337 }
|
|
|
3338 else if (EQ (arg, Qand_rest))
|
|
|
3339 {
|
|
|
3340 if (function_min_args_p)
|
|
|
3341 break;
|
|
|
3342 else
|
|
|
3343 return Qnil;
|
|
|
3344 }
|
|
|
3345 else
|
|
|
3346 {
|
|
|
3347 argcount++;
|
|
|
3348 }
|
|
|
3349 }
|
|
|
3350
|
|
|
3351 return make_int (argcount);
|
|
|
3352 }
|
|
|
3353 }
|
|
|
3354
|
|
|
3355 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3356 Return the number of arguments a function may be called with.
|
|
|
3357 The function may be any form that can be passed to `funcall',
|
|
|
3358 any special form, or any macro.
|
|
|
3359 */
|
|
|
3360 (function))
|
|
|
3361 {
|
|
|
3362 return function_argcount (function, 1);
|
|
|
3363 }
|
|
|
3364
|
|
|
3365 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3366 Return the number of arguments a function may be called with.
|
|
|
3367 The function may be any form that can be passed to `funcall',
|
|
|
3368 any special form, or any macro.
|
|
|
3369 If the function takes an arbitrary number of arguments or is
|
|
|
3370 a built-in special form, nil is returned.
|
|
|
3371 */
|
|
|
3372 (function))
|
|
|
3373 {
|
|
|
3374 return function_argcount (function, 0);
|
|
0
|
3375 }
|
|
|
3376
|
|
|
3377
|
|
20
|
3378 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
380
|
3379 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
0
|
3380 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3381 */
|
|
|
3382 (int nargs, Lisp_Object *args))
|
|
0
|
3383 {
|
|
|
3384 /* This function can GC */
|
|
|
3385 Lisp_Object fun = args[0];
|
|
380
|
3386 Lisp_Object spread_arg = args [nargs - 1];
|
|
0
|
3387 int numargs;
|
|
|
3388 int funcall_nargs;
|
|
|
3389
|
|
380
|
3390 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
0
|
3391
|
|
|
3392 if (numargs == 0)
|
|
|
3393 /* (apply foo 0 1 '()) */
|
|
|
3394 return Ffuncall (nargs - 1, args);
|
|
|
3395 else if (numargs == 1)
|
|
|
3396 {
|
|
|
3397 /* (apply foo 0 1 '(2)) */
|
|
|
3398 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3399 return Ffuncall (nargs, args);
|
|
|
3400 }
|
|
|
3401
|
|
|
3402 /* -1 for function, -1 for spread arg */
|
|
|
3403 numargs = nargs - 2 + numargs;
|
|
|
3404 /* +1 for function */
|
|
|
3405 funcall_nargs = 1 + numargs;
|
|
|
3406
|
|
|
3407 if (SYMBOLP (fun))
|
|
|
3408 fun = indirect_function (fun, 0);
|
|
380
|
3409
|
|
|
3410 if (SUBRP (fun))
|
|
0
|
3411 {
|
|
380
|
3412 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3413 int max_args = subr->max_args;
|
|
|
3414
|
|
|
3415 if (numargs < subr->min_args
|
|
|
3416 || (max_args >= 0 && max_args < numargs))
|
|
|
3417 {
|
|
|
3418 /* Let funcall get the error */
|
|
|
3419 }
|
|
|
3420 else if (max_args > numargs)
|
|
|
3421 {
|
|
|
3422 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3423 by explicitly supplying nil's for optional values */
|
|
|
3424 funcall_nargs += (max_args - numargs);
|
|
|
3425 }
|
|
|
3426 }
|
|
380
|
3427 else if (UNBOUNDP (fun))
|
|
|
3428 {
|
|
|
3429 /* Let funcall get the error */
|
|
|
3430 fun = args[0];
|
|
|
3431 }
|
|
|
3432
|
|
0
|
3433 {
|
|
|
3434 REGISTER int i;
|
|
185
|
3435 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
0
|
3436 struct gcpro gcpro1;
|
|
|
3437
|
|
|
3438 GCPRO1 (*funcall_args);
|
|
|
3439 gcpro1.nvars = funcall_nargs;
|
|
|
3440
|
|
|
3441 /* Copy in the unspread args */
|
|
|
3442 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3443 /* Spread the last arg we got. Its first element goes in
|
|
|
3444 the slot that it used to occupy, hence this value of I. */
|
|
185
|
3445 for (i = nargs - 1;
|
|
0
|
3446 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3447 i++, spread_arg = XCDR (spread_arg))
|
|
|
3448 {
|
|
|
3449 funcall_args [i] = XCAR (spread_arg);
|
|
|
3450 }
|
|
|
3451 /* Supply nil for optional args (to subrs) */
|
|
|
3452 for (; i < funcall_nargs; i++)
|
|
|
3453 funcall_args[i] = Qnil;
|
|
|
3454
|
|
|
3455
|
|
|
3456 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3457 }
|
|
|
3458 }
|
|
|
3459
|
|
|
3460
|
|
380
|
3461 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3462 return the result of evaluation. */
|
|
0
|
3463
|
|
|
3464 static Lisp_Object
|
|
380
|
3465 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
0
|
3466 {
|
|
|
3467 /* This function can GC */
|
|
380
|
3468 Lisp_Object symbol, arglist, body, tail;
|
|
|
3469 int speccount = specpdl_depth();
|
|
|
3470 REGISTER int i = 0;
|
|
|
3471
|
|
|
3472 tail = XCDR (fun);
|
|
|
3473
|
|
|
3474 if (!CONSP (tail))
|
|
|
3475 goto invalid_function;
|
|
|
3476
|
|
|
3477 arglist = XCAR (tail);
|
|
|
3478 body = XCDR (tail);
|
|
|
3479
|
|
|
3480 {
|
|
|
3481 int optional = 0, rest = 0;
|
|
|
3482
|
|
|
3483 EXTERNAL_LIST_LOOP_3 (symbol, arglist, tail)
|
|
|
3484 {
|
|
|
3485 if (!SYMBOLP (symbol))
|
|
|
3486 goto invalid_function;
|
|
|
3487 if (EQ (symbol, Qand_rest))
|
|
|
3488 rest = 1;
|
|
|
3489 else if (EQ (symbol, Qand_optional))
|
|
|
3490 optional = 1;
|
|
|
3491 else if (rest)
|
|
|
3492 {
|
|
|
3493 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3494 i = nargs;
|
|
|
3495 }
|
|
|
3496 else if (i < nargs)
|
|
|
3497 specbind (symbol, args[i++]);
|
|
|
3498 else if (!optional)
|
|
|
3499 goto wrong_number_of_arguments;
|
|
|
3500 else
|
|
|
3501 specbind (symbol, Qnil);
|
|
|
3502 }
|
|
|
3503 }
|
|
0
|
3504
|
|
|
3505 if (i < nargs)
|
|
380
|
3506 goto wrong_number_of_arguments;
|
|
|
3507
|
|
|
3508 return unbind_to (speccount, Fprogn (body));
|
|
|
3509
|
|
|
3510 wrong_number_of_arguments:
|
|
|
3511 return Fsignal (Qwrong_number_of_arguments, list2 (fun, make_int (nargs)));
|
|
|
3512
|
|
|
3513 invalid_function:
|
|
|
3514 return Fsignal (Qinvalid_function, list1 (fun));
|
|
0
|
3515 }
|
|
380
|
3516
|
|
0
|
3517
|
|
380
|
3518 /************************************************************************/
|
|
|
3519 /* Run hook variables in various ways. */
|
|
|
3520 /************************************************************************/
|
|
0
|
3521
|
|
20
|
3522 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3523 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3524 Each argument should be a symbol, a hook variable.
|
|
|
3525 These symbols are processed in the order specified.
|
|
|
3526 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3527 or a list of functions to be called to run the hook.
|
|
|
3528 If the value is a function, it is called with no arguments.
|
|
|
3529 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3530
|
|
|
3531 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3532 not `make-local-variable'.
|
|
20
|
3533 */
|
|
|
3534 (int nargs, Lisp_Object *args))
|
|
0
|
3535 {
|
|
|
3536 REGISTER int i;
|
|
|
3537
|
|
|
3538 for (i = 0; i < nargs; i++)
|
|
187
|
3539 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
0
|
3540
|
|
|
3541 return Qnil;
|
|
|
3542 }
|
|
185
|
3543
|
|
20
|
3544 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3545 Run HOOK with the specified arguments ARGS.
|
|
|
3546 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3547 value, that value may be a function or a list of functions to be
|
|
|
3548 called to run the hook. If the value is a function, it is called with
|
|
|
3549 the given arguments and its return value is returned. If it is a list
|
|
|
3550 of functions, those functions are called, in order,
|
|
|
3551 with the given arguments ARGS.
|
|
371
|
3552 It is best not to depend on the value return by `run-hook-with-args',
|
|
0
|
3553 as that may change.
|
|
|
3554
|
|
|
3555 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3556 not `make-local-variable'.
|
|
20
|
3557 */
|
|
|
3558 (int nargs, Lisp_Object *args))
|
|
0
|
3559 {
|
|
|
3560 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3561 }
|
|
|
3562
|
|
20
|
3563 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3564 Run HOOK with the specified arguments ARGS.
|
|
|
3565 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3566 be a list of functions. We call those functions, one by one,
|
|
|
3567 passing arguments ARGS to each of them, until one of them
|
|
|
3568 returns a non-nil value. Then we return that value.
|
|
|
3569 If all the functions return nil, we return nil.
|
|
|
3570
|
|
|
3571 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3572 not `make-local-variable'.
|
|
20
|
3573 */
|
|
|
3574 (int nargs, Lisp_Object *args))
|
|
0
|
3575 {
|
|
|
3576 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3577 }
|
|
|
3578
|
|
20
|
3579 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3580 Run HOOK with the specified arguments ARGS.
|
|
|
3581 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3582 be a list of functions. We call those functions, one by one,
|
|
|
3583 passing arguments ARGS to each of them, until one of them
|
|
|
3584 returns nil. Then we return nil.
|
|
|
3585 If all the functions return non-nil, we return non-nil.
|
|
|
3586
|
|
|
3587 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3588 not `make-local-variable'.
|
|
20
|
3589 */
|
|
|
3590 (int nargs, Lisp_Object *args))
|
|
0
|
3591 {
|
|
|
3592 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3593 }
|
|
|
3594
|
|
|
3595 /* ARGS[0] should be a hook symbol.
|
|
|
3596 Call each of the functions in the hook value, passing each of them
|
|
|
3597 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3598 COND specifies a condition to test after each call
|
|
|
3599 to decide whether to stop.
|
|
|
3600 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3601 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3602
|
|
|
3603 Lisp_Object
|
|
|
3604 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3605 enum run_hooks_condition cond)
|
|
|
3606 {
|
|
|
3607 Lisp_Object sym, val, ret;
|
|
|
3608
|
|
|
3609 if (!initialized || preparing_for_armageddon)
|
|
|
3610 /* We need to bail out of here pronto. */
|
|
|
3611 return Qnil;
|
|
|
3612
|
|
|
3613 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3614 will also be true unless something is really hosed. */
|
|
|
3615 assert (!gc_in_progress);
|
|
|
3616
|
|
|
3617 sym = args[0];
|
|
|
3618 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3619 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3620
|
|
|
3621 if (UNBOUNDP (val) || NILP (val))
|
|
|
3622 return ret;
|
|
|
3623 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3624 {
|
|
|
3625 args[0] = val;
|
|
|
3626 return Ffuncall (nargs, args);
|
|
|
3627 }
|
|
|
3628 else
|
|
|
3629 {
|
|
380
|
3630 struct gcpro gcpro1, gcpro2;
|
|
371
|
3631 GCPRO2 (sym, val);
|
|
0
|
3632
|
|
|
3633 for (;
|
|
|
3634 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3635 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3636 : !NILP (ret)));
|
|
|
3637 val = XCDR (val))
|
|
|
3638 {
|
|
|
3639 if (EQ (XCAR (val), Qt))
|
|
|
3640 {
|
|
|
3641 /* t indicates this hook has a local binding;
|
|
|
3642 it means to run the global binding too. */
|
|
371
|
3643 Lisp_Object globals = Fdefault_value (sym);
|
|
298
|
3644
|
|
|
3645 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3646 ! NILP (globals))
|
|
|
3647 {
|
|
|
3648 args[0] = globals;
|
|
|
3649 ret = Ffuncall (nargs, args);
|
|
|
3650 }
|
|
|
3651 else
|
|
0
|
3652 {
|
|
298
|
3653 for (;
|
|
|
3654 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3655 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3656 ? NILP (ret)
|
|
|
3657 : !NILP (ret)));
|
|
|
3658 globals = XCDR (globals))
|
|
|
3659 {
|
|
|
3660 args[0] = XCAR (globals);
|
|
|
3661 /* In a global value, t should not occur. If it does, we
|
|
|
3662 must ignore it to avoid an endless loop. */
|
|
|
3663 if (!EQ (args[0], Qt))
|
|
|
3664 ret = Ffuncall (nargs, args);
|
|
|
3665 }
|
|
0
|
3666 }
|
|
|
3667 }
|
|
|
3668 else
|
|
|
3669 {
|
|
|
3670 args[0] = XCAR (val);
|
|
|
3671 ret = Ffuncall (nargs, args);
|
|
|
3672 }
|
|
|
3673 }
|
|
|
3674
|
|
|
3675 UNGCPRO;
|
|
|
3676 return ret;
|
|
|
3677 }
|
|
|
3678 }
|
|
|
3679
|
|
|
3680 Lisp_Object
|
|
|
3681 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3682 enum run_hooks_condition cond)
|
|
|
3683 {
|
|
|
3684 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3685 }
|
|
|
3686
|
|
|
3687 #if 0
|
|
|
3688
|
|
|
3689 /* From FSF 19.30, not currently used */
|
|
|
3690
|
|
|
3691 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3692 present value of that symbol.
|
|
|
3693 Call each element of FUNLIST,
|
|
|
3694 passing each of them the rest of ARGS.
|
|
|
3695 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3696 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3697
|
|
|
3698 Lisp_Object
|
|
|
3699 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3700 {
|
|
380
|
3701 Lisp_Object sym = args[0];
|
|
0
|
3702 Lisp_Object val;
|
|
|
3703 struct gcpro gcpro1, gcpro2;
|
|
|
3704
|
|
|
3705 GCPRO2 (sym, val);
|
|
|
3706
|
|
|
3707 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3708 {
|
|
|
3709 if (EQ (XCAR (val), Qt))
|
|
|
3710 {
|
|
|
3711 /* t indicates this hook has a local binding;
|
|
|
3712 it means to run the global binding too. */
|
|
|
3713 Lisp_Object globals;
|
|
|
3714
|
|
|
3715 for (globals = Fdefault_value (sym);
|
|
|
3716 CONSP (globals);
|
|
|
3717 globals = XCDR (globals))
|
|
|
3718 {
|
|
|
3719 args[0] = XCAR (globals);
|
|
|
3720 /* In a global value, t should not occur. If it does, we
|
|
|
3721 must ignore it to avoid an endless loop. */
|
|
|
3722 if (!EQ (args[0], Qt))
|
|
|
3723 Ffuncall (nargs, args);
|
|
|
3724 }
|
|
|
3725 }
|
|
|
3726 else
|
|
|
3727 {
|
|
|
3728 args[0] = XCAR (val);
|
|
|
3729 Ffuncall (nargs, args);
|
|
|
3730 }
|
|
|
3731 }
|
|
|
3732 UNGCPRO;
|
|
|
3733 return Qnil;
|
|
|
3734 }
|
|
|
3735
|
|
|
3736 #endif /* 0 */
|
|
|
3737
|
|
|
3738 void
|
|
|
3739 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3740 {
|
|
|
3741 /* This function can GC */
|
|
|
3742 struct gcpro gcpro1;
|
|
|
3743 int i;
|
|
|
3744 va_list vargs;
|
|
185
|
3745 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3746
|
|
|
3747 va_start (vargs, nargs);
|
|
|
3748 funcall_args[0] = hook_var;
|
|
|
3749 for (i = 0; i < nargs; i++)
|
|
|
3750 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3751 va_end (vargs);
|
|
|
3752
|
|
|
3753 GCPRO1 (*funcall_args);
|
|
|
3754 gcpro1.nvars = nargs + 1;
|
|
|
3755 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3756 UNGCPRO;
|
|
|
3757 }
|
|
|
3758
|
|
|
3759 void
|
|
|
3760 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3761 int nargs, ...)
|
|
|
3762 {
|
|
|
3763 /* This function can GC */
|
|
|
3764 struct gcpro gcpro1;
|
|
|
3765 int i;
|
|
|
3766 va_list vargs;
|
|
185
|
3767 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3768
|
|
|
3769 va_start (vargs, nargs);
|
|
|
3770 funcall_args[0] = hook_var;
|
|
|
3771 for (i = 0; i < nargs; i++)
|
|
|
3772 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3773 va_end (vargs);
|
|
|
3774
|
|
|
3775 GCPRO1 (*funcall_args);
|
|
|
3776 gcpro1.nvars = nargs + 1;
|
|
|
3777 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3778 RUN_HOOKS_TO_COMPLETION);
|
|
|
3779 UNGCPRO;
|
|
|
3780 }
|
|
|
3781
|
|
|
3782 Lisp_Object
|
|
|
3783 run_hook (Lisp_Object hook)
|
|
|
3784 {
|
|
|
3785 Frun_hooks (1, &hook);
|
|
|
3786 return Qnil;
|
|
|
3787 }
|
|
|
3788
|
|
|
3789
|
|
380
|
3790 /************************************************************************/
|
|
|
3791 /* Front-ends to eval, funcall, apply */
|
|
|
3792 /************************************************************************/
|
|
0
|
3793
|
|
|
3794 /* Apply fn to arg */
|
|
|
3795 Lisp_Object
|
|
|
3796 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3797 {
|
|
|
3798 /* This function can GC */
|
|
|
3799 struct gcpro gcpro1;
|
|
|
3800 Lisp_Object args[2];
|
|
|
3801
|
|
|
3802 if (NILP (arg))
|
|
173
|
3803 return Ffuncall (1, &fn);
|
|
0
|
3804 GCPRO1 (args[0]);
|
|
|
3805 gcpro1.nvars = 2;
|
|
|
3806 args[0] = fn;
|
|
|
3807 args[1] = arg;
|
|
|
3808 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3809 }
|
|
|
3810
|
|
|
3811 /* Call function fn on no arguments */
|
|
|
3812 Lisp_Object
|
|
|
3813 call0 (Lisp_Object fn)
|
|
|
3814 {
|
|
|
3815 /* This function can GC */
|
|
|
3816 struct gcpro gcpro1;
|
|
|
3817
|
|
|
3818 GCPRO1 (fn);
|
|
|
3819 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3820 }
|
|
|
3821
|
|
|
3822 /* Call function fn with argument arg0 */
|
|
|
3823 Lisp_Object
|
|
|
3824 call1 (Lisp_Object fn,
|
|
|
3825 Lisp_Object arg0)
|
|
|
3826 {
|
|
|
3827 /* This function can GC */
|
|
|
3828 struct gcpro gcpro1;
|
|
185
|
3829 Lisp_Object args[2];
|
|
0
|
3830 args[0] = fn;
|
|
|
3831 args[1] = arg0;
|
|
|
3832 GCPRO1 (args[0]);
|
|
|
3833 gcpro1.nvars = 2;
|
|
|
3834 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3835 }
|
|
|
3836
|
|
|
3837 /* Call function fn with arguments arg0, arg1 */
|
|
|
3838 Lisp_Object
|
|
|
3839 call2 (Lisp_Object fn,
|
|
|
3840 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3841 {
|
|
|
3842 /* This function can GC */
|
|
|
3843 struct gcpro gcpro1;
|
|
|
3844 Lisp_Object args[3];
|
|
|
3845 args[0] = fn;
|
|
|
3846 args[1] = arg0;
|
|
|
3847 args[2] = arg1;
|
|
|
3848 GCPRO1 (args[0]);
|
|
|
3849 gcpro1.nvars = 3;
|
|
|
3850 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3851 }
|
|
|
3852
|
|
|
3853 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3854 Lisp_Object
|
|
|
3855 call3 (Lisp_Object fn,
|
|
|
3856 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3857 {
|
|
|
3858 /* This function can GC */
|
|
|
3859 struct gcpro gcpro1;
|
|
|
3860 Lisp_Object args[4];
|
|
|
3861 args[0] = fn;
|
|
|
3862 args[1] = arg0;
|
|
|
3863 args[2] = arg1;
|
|
|
3864 args[3] = arg2;
|
|
|
3865 GCPRO1 (args[0]);
|
|
|
3866 gcpro1.nvars = 4;
|
|
|
3867 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3868 }
|
|
|
3869
|
|
|
3870 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3871 Lisp_Object
|
|
|
3872 call4 (Lisp_Object fn,
|
|
|
3873 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3874 Lisp_Object arg3)
|
|
|
3875 {
|
|
|
3876 /* This function can GC */
|
|
|
3877 struct gcpro gcpro1;
|
|
|
3878 Lisp_Object args[5];
|
|
|
3879 args[0] = fn;
|
|
|
3880 args[1] = arg0;
|
|
|
3881 args[2] = arg1;
|
|
|
3882 args[3] = arg2;
|
|
|
3883 args[4] = arg3;
|
|
|
3884 GCPRO1 (args[0]);
|
|
|
3885 gcpro1.nvars = 5;
|
|
|
3886 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3887 }
|
|
|
3888
|
|
|
3889 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3890 Lisp_Object
|
|
|
3891 call5 (Lisp_Object fn,
|
|
185
|
3892 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3893 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3894 {
|
|
|
3895 /* This function can GC */
|
|
|
3896 struct gcpro gcpro1;
|
|
|
3897 Lisp_Object args[6];
|
|
|
3898 args[0] = fn;
|
|
|
3899 args[1] = arg0;
|
|
|
3900 args[2] = arg1;
|
|
|
3901 args[3] = arg2;
|
|
|
3902 args[4] = arg3;
|
|
|
3903 args[5] = arg4;
|
|
|
3904 GCPRO1 (args[0]);
|
|
|
3905 gcpro1.nvars = 6;
|
|
|
3906 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
3907 }
|
|
|
3908
|
|
|
3909 Lisp_Object
|
|
|
3910 call6 (Lisp_Object fn,
|
|
185
|
3911 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3912 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
3913 {
|
|
|
3914 /* This function can GC */
|
|
|
3915 struct gcpro gcpro1;
|
|
|
3916 Lisp_Object args[7];
|
|
|
3917 args[0] = fn;
|
|
|
3918 args[1] = arg0;
|
|
|
3919 args[2] = arg1;
|
|
|
3920 args[3] = arg2;
|
|
|
3921 args[4] = arg3;
|
|
|
3922 args[5] = arg4;
|
|
|
3923 args[6] = arg5;
|
|
|
3924 GCPRO1 (args[0]);
|
|
|
3925 gcpro1.nvars = 7;
|
|
|
3926 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
3927 }
|
|
|
3928
|
|
|
3929 Lisp_Object
|
|
|
3930 call7 (Lisp_Object fn,
|
|
185
|
3931 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3932 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3933 Lisp_Object arg6)
|
|
|
3934 {
|
|
|
3935 /* This function can GC */
|
|
|
3936 struct gcpro gcpro1;
|
|
|
3937 Lisp_Object args[8];
|
|
|
3938 args[0] = fn;
|
|
|
3939 args[1] = arg0;
|
|
|
3940 args[2] = arg1;
|
|
|
3941 args[3] = arg2;
|
|
|
3942 args[4] = arg3;
|
|
|
3943 args[5] = arg4;
|
|
|
3944 args[6] = arg5;
|
|
|
3945 args[7] = arg6;
|
|
|
3946 GCPRO1 (args[0]);
|
|
|
3947 gcpro1.nvars = 8;
|
|
|
3948 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
3949 }
|
|
|
3950
|
|
|
3951 Lisp_Object
|
|
|
3952 call8 (Lisp_Object fn,
|
|
185
|
3953 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3954 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3955 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
3956 {
|
|
|
3957 /* This function can GC */
|
|
|
3958 struct gcpro gcpro1;
|
|
|
3959 Lisp_Object args[9];
|
|
|
3960 args[0] = fn;
|
|
|
3961 args[1] = arg0;
|
|
|
3962 args[2] = arg1;
|
|
|
3963 args[3] = arg2;
|
|
|
3964 args[4] = arg3;
|
|
|
3965 args[5] = arg4;
|
|
|
3966 args[6] = arg5;
|
|
|
3967 args[7] = arg6;
|
|
|
3968 args[8] = arg7;
|
|
|
3969 GCPRO1 (args[0]);
|
|
|
3970 gcpro1.nvars = 9;
|
|
|
3971 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
3972 }
|
|
|
3973
|
|
|
3974 Lisp_Object
|
|
|
3975 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
3976 {
|
|
272
|
3977 if (current_buffer == buf)
|
|
|
3978 return call0 (fn);
|
|
|
3979 else
|
|
0
|
3980 {
|
|
272
|
3981 Lisp_Object val;
|
|
380
|
3982 int speccount = specpdl_depth();
|
|
0
|
3983 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
3984 set_buffer_internal (buf);
|
|
272
|
3985 val = call0 (fn);
|
|
|
3986 unbind_to (speccount, Qnil);
|
|
|
3987 return val;
|
|
0
|
3988 }
|
|
|
3989 }
|
|
|
3990
|
|
|
3991 Lisp_Object
|
|
|
3992 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
3993 Lisp_Object arg0)
|
|
|
3994 {
|
|
272
|
3995 if (current_buffer == buf)
|
|
|
3996 return call1 (fn, arg0);
|
|
|
3997 else
|
|
0
|
3998 {
|
|
272
|
3999 Lisp_Object val;
|
|
380
|
4000 int speccount = specpdl_depth();
|
|
0
|
4001 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4002 set_buffer_internal (buf);
|
|
272
|
4003 val = call1 (fn, arg0);
|
|
|
4004 unbind_to (speccount, Qnil);
|
|
|
4005 return val;
|
|
0
|
4006 }
|
|
|
4007 }
|
|
|
4008
|
|
|
4009 Lisp_Object
|
|
|
4010 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4011 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4012 {
|
|
272
|
4013 if (current_buffer == buf)
|
|
|
4014 return call2 (fn, arg0, arg1);
|
|
|
4015 else
|
|
0
|
4016 {
|
|
272
|
4017 Lisp_Object val;
|
|
380
|
4018 int speccount = specpdl_depth();
|
|
0
|
4019 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4020 set_buffer_internal (buf);
|
|
272
|
4021 val = call2 (fn, arg0, arg1);
|
|
|
4022 unbind_to (speccount, Qnil);
|
|
|
4023 return val;
|
|
0
|
4024 }
|
|
|
4025 }
|
|
|
4026
|
|
|
4027 Lisp_Object
|
|
|
4028 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4029 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4030 {
|
|
272
|
4031 if (current_buffer == buf)
|
|
|
4032 return call3 (fn, arg0, arg1, arg2);
|
|
|
4033 else
|
|
0
|
4034 {
|
|
272
|
4035 Lisp_Object val;
|
|
380
|
4036 int speccount = specpdl_depth();
|
|
0
|
4037 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4038 set_buffer_internal (buf);
|
|
272
|
4039 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4040 unbind_to (speccount, Qnil);
|
|
|
4041 return val;
|
|
0
|
4042 }
|
|
|
4043 }
|
|
|
4044
|
|
|
4045 Lisp_Object
|
|
|
4046 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4047 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4048 Lisp_Object arg3)
|
|
|
4049 {
|
|
272
|
4050 if (current_buffer == buf)
|
|
|
4051 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4052 else
|
|
0
|
4053 {
|
|
272
|
4054 Lisp_Object val;
|
|
380
|
4055 int speccount = specpdl_depth();
|
|
0
|
4056 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4057 set_buffer_internal (buf);
|
|
272
|
4058 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4059 unbind_to (speccount, Qnil);
|
|
|
4060 return val;
|
|
0
|
4061 }
|
|
|
4062 }
|
|
|
4063
|
|
|
4064 Lisp_Object
|
|
|
4065 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4066 {
|
|
272
|
4067 if (current_buffer == buf)
|
|
|
4068 return Feval (form);
|
|
|
4069 else
|
|
0
|
4070 {
|
|
272
|
4071 Lisp_Object val;
|
|
380
|
4072 int speccount = specpdl_depth();
|
|
0
|
4073 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4074 set_buffer_internal (buf);
|
|
272
|
4075 val = Feval (form);
|
|
|
4076 unbind_to (speccount, Qnil);
|
|
|
4077 return val;
|
|
0
|
4078 }
|
|
|
4079 }
|
|
|
4080
|
|
|
4081
|
|
380
|
4082 /************************************************************************/
|
|
|
4083 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4084 /************************************************************************/
|
|
0
|
4085
|
|
|
4086 /* Call function fn on no arguments, with condition handler */
|
|
|
4087 Lisp_Object
|
|
|
4088 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4089 {
|
|
|
4090 /* This function can GC */
|
|
|
4091 struct gcpro gcpro1;
|
|
|
4092 Lisp_Object args[2];
|
|
|
4093 args[0] = handler;
|
|
|
4094 args[1] = fn;
|
|
|
4095 GCPRO1 (args[0]);
|
|
|
4096 gcpro1.nvars = 2;
|
|
|
4097 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4098 }
|
|
|
4099
|
|
|
4100 /* Call function fn with argument arg0, with condition handler */
|
|
|
4101 Lisp_Object
|
|
|
4102 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4103 Lisp_Object arg0)
|
|
|
4104 {
|
|
|
4105 /* This function can GC */
|
|
|
4106 struct gcpro gcpro1;
|
|
|
4107 Lisp_Object args[3];
|
|
|
4108 args[0] = handler;
|
|
|
4109 args[1] = fn;
|
|
|
4110 args[2] = arg0;
|
|
|
4111 GCPRO1 (args[0]);
|
|
|
4112 gcpro1.nvars = 3;
|
|
|
4113 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4114 }
|
|
|
4115
|
|
|
4116
|
|
|
4117 /* The following functions provide you with error-trapping versions
|
|
|
4118 of the various front-ends above. They take an additional
|
|
|
4119 "warning_string" argument; if non-zero, a warning with this
|
|
|
4120 string and the actual error that occurred will be displayed
|
|
|
4121 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4122 QUIT is inhibited while these functions are running, and if
|
|
|
4123 an error occurs, Qunbound is returned instead of the normal
|
|
|
4124 return value.
|
|
|
4125 */
|
|
|
4126
|
|
185
|
4127 /* #### This stuff needs to catch throws as well. We need to
|
|
0
|
4128 improve internal_catch() so it can take a "catch anything"
|
|
|
4129 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4130
|
|
|
4131 static Lisp_Object
|
|
|
4132 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4133 {
|
|
|
4134 if (!NILP (errordata))
|
|
|
4135 {
|
|
|
4136 Lisp_Object args[2];
|
|
185
|
4137
|
|
0
|
4138 if (!NILP (arg))
|
|
|
4139 {
|
|
|
4140 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4141 args[0] = build_string (str);
|
|
|
4142 }
|
|
|
4143 else
|
|
|
4144 args[0] = build_string ("error");
|
|
|
4145 /* #### This should call
|
|
|
4146 (with-output-to-string (display-error errordata))
|
|
|
4147 but that stuff is all in Lisp currently. */
|
|
|
4148 args[1] = errordata;
|
|
|
4149 warn_when_safe_lispobj
|
|
|
4150 (Qerror, Qwarning,
|
|
|
4151 emacs_doprnt_string_lisp ((CONST Bufbyte *) "%s: %s",
|
|
|
4152 Qnil, -1, 2, args));
|
|
|
4153 }
|
|
|
4154 return Qunbound;
|
|
|
4155 }
|
|
|
4156
|
|
|
4157 static Lisp_Object
|
|
|
4158 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4159 {
|
|
|
4160 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4161 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4162 return caught_a_squirmer (errordata, arg);
|
|
|
4163 }
|
|
|
4164
|
|
|
4165 static Lisp_Object
|
|
|
4166 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4167 {
|
|
|
4168 Lisp_Object hook = Fcar (arg);
|
|
|
4169 arg = Fcdr (arg);
|
|
|
4170 /* Clear out the hook. */
|
|
|
4171 Fset (hook, Qnil);
|
|
|
4172 return caught_a_squirmer (errordata, arg);
|
|
|
4173 }
|
|
|
4174
|
|
|
4175 static Lisp_Object
|
|
|
4176 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4177 Lisp_Object arg)
|
|
|
4178 {
|
|
|
4179 Lisp_Object hook = Fcar (arg);
|
|
|
4180 arg = Fcdr (arg);
|
|
|
4181 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4182 /* Clear out the hook. */
|
|
|
4183 Fset (hook, Qnil);
|
|
|
4184 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4185 }
|
|
|
4186
|
|
|
4187 static Lisp_Object
|
|
|
4188 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4189 {
|
|
|
4190 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4191 }
|
|
|
4192
|
|
|
4193 Lisp_Object
|
|
|
4194 eval_in_buffer_trapping_errors (CONST char *warning_string,
|
|
|
4195 struct buffer *buf, Lisp_Object form)
|
|
|
4196 {
|
|
380
|
4197 int speccount = specpdl_depth();
|
|
0
|
4198 Lisp_Object tem;
|
|
272
|
4199 Lisp_Object buffer;
|
|
0
|
4200 Lisp_Object cons;
|
|
|
4201 Lisp_Object opaque;
|
|
|
4202 struct gcpro gcpro1, gcpro2;
|
|
|
4203
|
|
|
4204 XSETBUFFER (buffer, buf);
|
|
|
4205
|
|
|
4206 specbind (Qinhibit_quit, Qt);
|
|
|
4207 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4208
|
|
|
4209 cons = noseeum_cons (buffer, form);
|
|
|
4210 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4211 GCPRO2 (cons, opaque);
|
|
|
4212 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4213 tem = condition_case_1 (Qerror,
|
|
|
4214 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4215 caught_a_squirmer, opaque);
|
|
|
4216 free_cons (XCONS (cons));
|
|
|
4217 if (OPAQUEP (opaque))
|
|
|
4218 free_opaque_ptr (opaque);
|
|
|
4219 UNGCPRO;
|
|
185
|
4220
|
|
0
|
4221 /* gc_currently_forbidden = 0; */
|
|
|
4222 return unbind_to (speccount, tem);
|
|
|
4223 }
|
|
|
4224
|
|
|
4225 static Lisp_Object
|
|
|
4226 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4227 {
|
|
|
4228 /* This function can GC */
|
|
|
4229 run_hook (hook_symbol);
|
|
|
4230 return Qnil;
|
|
|
4231 }
|
|
|
4232
|
|
|
4233 Lisp_Object
|
|
|
4234 run_hook_trapping_errors (CONST char *warning_string, Lisp_Object hook_symbol)
|
|
|
4235 {
|
|
272
|
4236 int speccount;
|
|
0
|
4237 Lisp_Object tem;
|
|
|
4238 Lisp_Object opaque;
|
|
|
4239 struct gcpro gcpro1;
|
|
|
4240
|
|
|
4241 if (!initialized || preparing_for_armageddon)
|
|
|
4242 return Qnil;
|
|
|
4243 tem = find_symbol_value (hook_symbol);
|
|
|
4244 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4245 return Qnil;
|
|
|
4246
|
|
380
|
4247 speccount = specpdl_depth();
|
|
0
|
4248 specbind (Qinhibit_quit, Qt);
|
|
|
4249
|
|
|
4250 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4251 GCPRO1 (opaque);
|
|
|
4252 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4253 tem = condition_case_1 (Qerror,
|
|
|
4254 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4255 caught_a_squirmer, opaque);
|
|
|
4256 if (OPAQUEP (opaque))
|
|
|
4257 free_opaque_ptr (opaque);
|
|
|
4258 UNGCPRO;
|
|
|
4259
|
|
|
4260 return unbind_to (speccount, tem);
|
|
|
4261 }
|
|
|
4262
|
|
|
4263 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4264 if an error occurs. */
|
|
|
4265
|
|
|
4266 Lisp_Object
|
|
|
4267 safe_run_hook_trapping_errors (CONST char *warning_string,
|
|
|
4268 Lisp_Object hook_symbol,
|
|
|
4269 int allow_quit)
|
|
|
4270 {
|
|
380
|
4271 int speccount = specpdl_depth();
|
|
0
|
4272 Lisp_Object tem;
|
|
|
4273 Lisp_Object cons = Qnil;
|
|
|
4274 struct gcpro gcpro1;
|
|
|
4275
|
|
|
4276 if (!initialized || preparing_for_armageddon)
|
|
|
4277 return Qnil;
|
|
|
4278 tem = find_symbol_value (hook_symbol);
|
|
|
4279 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4280 return Qnil;
|
|
|
4281
|
|
|
4282 if (!allow_quit)
|
|
|
4283 specbind (Qinhibit_quit, Qt);
|
|
|
4284
|
|
185
|
4285 cons = noseeum_cons (hook_symbol,
|
|
0
|
4286 warning_string ? make_opaque_ptr (warning_string)
|
|
|
4287 : Qnil);
|
|
|
4288 GCPRO1 (cons);
|
|
|
4289 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4290 tem = condition_case_1 (Qerror,
|
|
|
4291 catch_them_squirmers_run_hook,
|
|
|
4292 hook_symbol,
|
|
|
4293 allow_quit ?
|
|
|
4294 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4295 safe_run_hook_caught_a_squirmer,
|
|
|
4296 cons);
|
|
|
4297 if (OPAQUEP (XCDR (cons)))
|
|
|
4298 free_opaque_ptr (XCDR (cons));
|
|
|
4299 free_cons (XCONS (cons));
|
|
|
4300 UNGCPRO;
|
|
|
4301
|
|
|
4302 return unbind_to (speccount, tem);
|
|
|
4303 }
|
|
|
4304
|
|
|
4305 static Lisp_Object
|
|
|
4306 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4307 {
|
|
|
4308 /* This function can GC */
|
|
|
4309 return call0 (function);
|
|
|
4310 }
|
|
|
4311
|
|
|
4312 Lisp_Object
|
|
|
4313 call0_trapping_errors (CONST char *warning_string, Lisp_Object function)
|
|
|
4314 {
|
|
272
|
4315 int speccount;
|
|
0
|
4316 Lisp_Object tem;
|
|
|
4317 Lisp_Object opaque = Qnil;
|
|
|
4318 struct gcpro gcpro1, gcpro2;
|
|
|
4319
|
|
|
4320 if (SYMBOLP (function))
|
|
|
4321 {
|
|
|
4322 tem = XSYMBOL (function)->function;
|
|
|
4323 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4324 return Qnil;
|
|
0
|
4325 }
|
|
|
4326
|
|
|
4327 GCPRO2 (opaque, function);
|
|
380
|
4328 speccount = specpdl_depth();
|
|
0
|
4329 specbind (Qinhibit_quit, Qt);
|
|
|
4330 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4331
|
|
|
4332 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4333 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4334 tem = condition_case_1 (Qerror,
|
|
|
4335 catch_them_squirmers_call0, function,
|
|
|
4336 caught_a_squirmer, opaque);
|
|
|
4337 if (OPAQUEP (opaque))
|
|
|
4338 free_opaque_ptr (opaque);
|
|
|
4339 UNGCPRO;
|
|
|
4340
|
|
|
4341 /* gc_currently_forbidden = 0; */
|
|
|
4342 return unbind_to (speccount, tem);
|
|
|
4343 }
|
|
|
4344
|
|
|
4345 static Lisp_Object
|
|
|
4346 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4347 {
|
|
|
4348 /* This function can GC */
|
|
|
4349 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4350 }
|
|
|
4351
|
|
|
4352 static Lisp_Object
|
|
|
4353 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4354 {
|
|
|
4355 /* This function can GC */
|
|
|
4356 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4357 }
|
|
|
4358
|
|
|
4359 Lisp_Object
|
|
|
4360 call1_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4361 Lisp_Object object)
|
|
|
4362 {
|
|
380
|
4363 int speccount = specpdl_depth();
|
|
0
|
4364 Lisp_Object tem;
|
|
|
4365 Lisp_Object cons = Qnil;
|
|
|
4366 Lisp_Object opaque = Qnil;
|
|
|
4367 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4368
|
|
|
4369 if (SYMBOLP (function))
|
|
|
4370 {
|
|
|
4371 tem = XSYMBOL (function)->function;
|
|
|
4372 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4373 return Qnil;
|
|
0
|
4374 }
|
|
|
4375
|
|
|
4376 GCPRO4 (cons, opaque, function, object);
|
|
|
4377
|
|
|
4378 specbind (Qinhibit_quit, Qt);
|
|
|
4379 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4380
|
|
|
4381 cons = noseeum_cons (function, object);
|
|
|
4382 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4383 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4384 tem = condition_case_1 (Qerror,
|
|
|
4385 catch_them_squirmers_call1, cons,
|
|
|
4386 caught_a_squirmer, opaque);
|
|
|
4387 if (OPAQUEP (opaque))
|
|
|
4388 free_opaque_ptr (opaque);
|
|
|
4389 free_cons (XCONS (cons));
|
|
|
4390 UNGCPRO;
|
|
185
|
4391
|
|
0
|
4392 /* gc_currently_forbidden = 0; */
|
|
|
4393 return unbind_to (speccount, tem);
|
|
|
4394 }
|
|
|
4395
|
|
|
4396 Lisp_Object
|
|
|
4397 call2_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4398 Lisp_Object object1, Lisp_Object object2)
|
|
|
4399 {
|
|
380
|
4400 int speccount = specpdl_depth();
|
|
0
|
4401 Lisp_Object tem;
|
|
|
4402 Lisp_Object cons = Qnil;
|
|
|
4403 Lisp_Object opaque = Qnil;
|
|
|
4404 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4405
|
|
|
4406 if (SYMBOLP (function))
|
|
|
4407 {
|
|
|
4408 tem = XSYMBOL (function)->function;
|
|
|
4409 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4410 return Qnil;
|
|
0
|
4411 }
|
|
|
4412
|
|
|
4413 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4414 specbind (Qinhibit_quit, Qt);
|
|
|
4415 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4416
|
|
|
4417 cons = list3 (function, object1, object2);
|
|
|
4418 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4419 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4420 tem = condition_case_1 (Qerror,
|
|
|
4421 catch_them_squirmers_call2, cons,
|
|
|
4422 caught_a_squirmer, opaque);
|
|
|
4423 if (OPAQUEP (opaque))
|
|
|
4424 free_opaque_ptr (opaque);
|
|
|
4425 free_list (cons);
|
|
|
4426 UNGCPRO;
|
|
|
4427
|
|
|
4428 /* gc_currently_forbidden = 0; */
|
|
|
4429 return unbind_to (speccount, tem);
|
|
|
4430 }
|
|
|
4431
|
|
|
4432
|
|
380
|
4433 /************************************************************************/
|
|
|
4434 /* The special binding stack */
|
|
|
4435 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4436 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4437 /************************************************************************/
|
|
0
|
4438
|
|
2
|
4439 #define min_max_specpdl_size 400
|
|
|
4440
|
|
380
|
4441 void
|
|
|
4442 grow_specpdl (size_t reserved)
|
|
0
|
4443 {
|
|
380
|
4444 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4445 if (size_needed >= max_specpdl_size)
|
|
0
|
4446 {
|
|
2
|
4447 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4448 max_specpdl_size = min_max_specpdl_size;
|
|
380
|
4449 if (size_needed >= max_specpdl_size)
|
|
0
|
4450 {
|
|
380
|
4451 if (!NILP (Vdebug_on_error) ||
|
|
|
4452 !NILP (Vdebug_on_signal))
|
|
0
|
4453 /* Leave room for some specpdl in the debugger. */
|
|
380
|
4454 max_specpdl_size = size_needed + 100;
|
|
0
|
4455 continuable_error
|
|
|
4456 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4457 }
|
|
|
4458 }
|
|
380
|
4459 while (specpdl_size < size_needed)
|
|
|
4460 {
|
|
|
4461 specpdl_size *= 2;
|
|
|
4462 if (specpdl_size > max_specpdl_size)
|
|
|
4463 specpdl_size = max_specpdl_size;
|
|
|
4464 }
|
|
185
|
4465 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
380
|
4466 specpdl_ptr = specpdl + specpdl_depth();
|
|
0
|
4467 }
|
|
|
4468
|
|
|
4469
|
|
|
4470 /* Handle unbinding buffer-local variables */
|
|
|
4471 static Lisp_Object
|
|
|
4472 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4473 {
|
|
|
4474 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4475 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4476 struct Lisp_Cons *victim = XCONS (ovalue);
|
|
|
4477 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4478 ovalue = victim->cdr;
|
|
|
4479
|
|
|
4480 free_cons (victim);
|
|
|
4481
|
|
|
4482 if (NILP (buf))
|
|
|
4483 {
|
|
|
4484 /* Deleted buffer -- do nothing */
|
|
|
4485 }
|
|
|
4486 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4487 {
|
|
|
4488 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4489 * (kill-local-variable can do this.)
|
|
|
4490 * Do nothing in this case.
|
|
|
4491 */
|
|
|
4492 }
|
|
|
4493 else if (EQ (buf, current))
|
|
|
4494 Fset (symbol, ovalue);
|
|
|
4495 else
|
|
|
4496 {
|
|
|
4497 /* Urk! Somebody switched buffers */
|
|
|
4498 struct gcpro gcpro1;
|
|
|
4499 GCPRO1 (current);
|
|
|
4500 Fset_buffer (buf);
|
|
|
4501 Fset (symbol, ovalue);
|
|
|
4502 Fset_buffer (current);
|
|
|
4503 UNGCPRO;
|
|
|
4504 }
|
|
173
|
4505 return symbol;
|
|
0
|
4506 }
|
|
|
4507
|
|
|
4508 static Lisp_Object
|
|
|
4509 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4510 {
|
|
|
4511 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4512 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4513
|
|
|
4514 buffer = get_buffer (buffer, 0);
|
|
|
4515 if (NILP (buffer))
|
|
|
4516 {
|
|
|
4517 /* Deleted buffer -- do nothing */
|
|
|
4518 }
|
|
|
4519 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4520 {
|
|
|
4521 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4522 * (kill-local-variable can do this.)
|
|
|
4523 * Do nothing in this case.
|
|
|
4524 */
|
|
|
4525 }
|
|
|
4526 else if (EQ (buffer, current))
|
|
|
4527 Fkill_local_variable (symbol);
|
|
|
4528 else
|
|
|
4529 {
|
|
|
4530 /* Urk! Somebody switched buffers */
|
|
|
4531 struct gcpro gcpro1;
|
|
|
4532 GCPRO1 (current);
|
|
|
4533 Fset_buffer (buffer);
|
|
|
4534 Fkill_local_variable (symbol);
|
|
|
4535 Fset_buffer (current);
|
|
|
4536 UNGCPRO;
|
|
|
4537 }
|
|
173
|
4538 return symbol;
|
|
0
|
4539 }
|
|
|
4540
|
|
|
4541
|
|
|
4542 void
|
|
|
4543 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4544 {
|
|
380
|
4545 SPECBIND (symbol, value);
|
|
|
4546 }
|
|
|
4547
|
|
|
4548 void
|
|
|
4549 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4550 {
|
|
|
4551 int buffer_local =
|
|
|
4552 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4553
|
|
0
|
4554 if (buffer_local == 0)
|
|
|
4555 {
|
|
|
4556 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4557 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4558 }
|
|
|
4559 else if (buffer_local > 0)
|
|
|
4560 {
|
|
|
4561 /* Already buffer-local */
|
|
|
4562 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4563 find_symbol_value (symbol));
|
|
|
4564 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4565 }
|
|
|
4566 else
|
|
|
4567 {
|
|
|
4568 /* About to become buffer-local */
|
|
|
4569 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4570 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4571 }
|
|
185
|
4572
|
|
0
|
4573 specpdl_ptr->symbol = symbol;
|
|
|
4574 specpdl_ptr++;
|
|
|
4575 specpdl_depth_counter++;
|
|
|
4576
|
|
|
4577 Fset (symbol, value);
|
|
|
4578 }
|
|
|
4579
|
|
|
4580 void
|
|
|
4581 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4582 Lisp_Object arg)
|
|
|
4583 {
|
|
380
|
4584 SPECPDL_RESERVE (1);
|
|
0
|
4585 specpdl_ptr->func = function;
|
|
|
4586 specpdl_ptr->symbol = Qnil;
|
|
|
4587 specpdl_ptr->old_value = arg;
|
|
|
4588 specpdl_ptr++;
|
|
|
4589 specpdl_depth_counter++;
|
|
|
4590 }
|
|
|
4591
|
|
|
4592 extern int check_sigio (void);
|
|
|
4593
|
|
380
|
4594 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4595 VALUE is not used, except that, purely as a convenience to the
|
|
|
4596 caller, it is protected from garbage-protection. */
|
|
0
|
4597 Lisp_Object
|
|
|
4598 unbind_to (int count, Lisp_Object value)
|
|
|
4599 {
|
|
380
|
4600 UNBIND_TO_GCPRO (count, value);
|
|
|
4601 return value;
|
|
|
4602 }
|
|
|
4603
|
|
|
4604 /* Don't call this directly.
|
|
|
4605 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4606 void
|
|
|
4607 unbind_to_hairy (int count)
|
|
|
4608 {
|
|
0
|
4609 int quitf;
|
|
|
4610
|
|
|
4611 check_quit (); /* make Vquit_flag accurate */
|
|
|
4612 quitf = !NILP (Vquit_flag);
|
|
|
4613 Vquit_flag = Qnil;
|
|
|
4614
|
|
380
|
4615 ++specpdl_ptr;
|
|
|
4616 ++specpdl_depth_counter;
|
|
|
4617
|
|
0
|
4618 while (specpdl_depth_counter != count)
|
|
|
4619 {
|
|
|
4620 --specpdl_ptr;
|
|
|
4621 --specpdl_depth_counter;
|
|
|
4622
|
|
|
4623 if (specpdl_ptr->func != 0)
|
|
|
4624 /* An unwind-protect */
|
|
380
|
4625 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
0
|
4626 else
|
|
380
|
4627 {
|
|
|
4628 /* We checked symbol for validity when we specbound it,
|
|
|
4629 so only need to call Fset if symbol has magic value. */
|
|
|
4630 struct Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
|
4631 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4632 sym->value = specpdl_ptr->old_value;
|
|
|
4633 else
|
|
|
4634 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4635 }
|
|
|
4636
|
|
|
4637 #if 0 /* martin */
|
|
0
|
4638 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4639 /* There should never be anything here for us to remove.
|
|
|
4640 If so, it indicates a logic error in Emacs. Catches
|
|
|
4641 should get removed when a throw or signal occurs, or
|
|
|
4642 when a catch or condition-case exits normally. But
|
|
|
4643 it's too dangerous to just remove this code. --ben */
|
|
|
4644
|
|
|
4645 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4646 Braino on mly's part? */
|
|
|
4647 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4648 that catch can't possibly still be valid. */
|
|
|
4649 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4650 {
|
|
|
4651 catchlist = catchlist->next;
|
|
|
4652 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4653 }
|
|
|
4654 #endif
|
|
380
|
4655 #endif
|
|
0
|
4656 }
|
|
|
4657 if (quitf)
|
|
|
4658 Vquit_flag = Qt;
|
|
|
4659 }
|
|
|
4660
|
|
|
4661
|
|
|
4662
|
|
|
4663 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4664 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4665
|
|
|
4666 Lisp_Object
|
|
|
4667 top_level_value (Lisp_Object symbol)
|
|
|
4668 {
|
|
|
4669 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4670
|
|
|
4671 CHECK_SYMBOL (symbol);
|
|
|
4672 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4673 {
|
|
|
4674 if (EQ (ptr->symbol, symbol))
|
|
|
4675 return ptr->old_value;
|
|
|
4676 }
|
|
|
4677 return XSYMBOL (symbol)->value;
|
|
|
4678 }
|
|
|
4679
|
|
|
4680 #if 0
|
|
|
4681
|
|
|
4682 Lisp_Object
|
|
|
4683 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4684 {
|
|
|
4685 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4686
|
|
|
4687 CHECK_SYMBOL (symbol);
|
|
|
4688 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4689 {
|
|
|
4690 if (EQ (ptr->symbol, symbol))
|
|
|
4691 {
|
|
|
4692 ptr->old_value = newval;
|
|
|
4693 return newval;
|
|
|
4694 }
|
|
|
4695 }
|
|
|
4696 return Fset (symbol, newval);
|
|
185
|
4697 }
|
|
0
|
4698
|
|
|
4699 #endif /* 0 */
|
|
|
4700
|
|
|
4701
|
|
380
|
4702 /************************************************************************/
|
|
|
4703 /* Backtraces */
|
|
|
4704 /************************************************************************/
|
|
0
|
4705
|
|
20
|
4706 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4707 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4708 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4709 */
|
|
|
4710 (level, flag))
|
|
0
|
4711 {
|
|
|
4712 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4713 REGISTER int i;
|
|
|
4714
|
|
|
4715 CHECK_INT (level);
|
|
|
4716
|
|
|
4717 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4718 {
|
|
|
4719 backlist = backlist->next;
|
|
|
4720 }
|
|
|
4721
|
|
|
4722 if (backlist)
|
|
|
4723 backlist->debug_on_exit = !NILP (flag);
|
|
|
4724
|
|
|
4725 return flag;
|
|
|
4726 }
|
|
|
4727
|
|
|
4728 static void
|
|
|
4729 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4730 {
|
|
|
4731 int printing_bindings = 0;
|
|
|
4732
|
|
|
4733 for (; speccount > speclimit; speccount--)
|
|
|
4734 {
|
|
|
4735 if (specpdl[speccount - 1].func == 0
|
|
|
4736 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4737 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4738 {
|
|
|
4739 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4740 stream);
|
|
|
4741 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4742 printing_bindings = 1;
|
|
|
4743 }
|
|
|
4744 else
|
|
|
4745 {
|
|
|
4746 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4747 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4748 printing_bindings = 0;
|
|
|
4749 }
|
|
|
4750 }
|
|
|
4751 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4752 }
|
|
|
4753
|
|
20
|
4754 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4755 Print a trace of Lisp function calls currently active.
|
|
371
|
4756 Option arg STREAM specifies the output stream to send the backtrace to,
|
|
0
|
4757 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4758 DETAILED means show places where currently active variable bindings,
|
|
|
4759 catches, condition-cases, and unwind-protects were made as well as
|
|
185
|
4760 function calls.
|
|
20
|
4761 */
|
|
|
4762 (stream, detailed))
|
|
0
|
4763 {
|
|
249
|
4764 /* This function can GC */
|
|
0
|
4765 struct backtrace *backlist = backtrace_list;
|
|
|
4766 struct catchtag *catches = catchlist;
|
|
380
|
4767 int speccount = specpdl_depth();
|
|
0
|
4768
|
|
|
4769 int old_nl = print_escape_newlines;
|
|
|
4770 int old_pr = print_readably;
|
|
|
4771 Lisp_Object old_level = Vprint_level;
|
|
|
4772 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4773 struct gcpro gcpro1, gcpro2;
|
|
|
4774
|
|
|
4775 /* We can't allow quits in here because that could cause the values
|
|
|
4776 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4777 Normally we would use a record_unwind_protect but that would
|
|
|
4778 screw up the functioning of this function. */
|
|
|
4779 Vinhibit_quit = Qt;
|
|
|
4780
|
|
|
4781 entering_debugger = 0;
|
|
|
4782
|
|
|
4783 Vprint_level = make_int (3);
|
|
|
4784 print_readably = 0;
|
|
|
4785 print_escape_newlines = 1;
|
|
|
4786
|
|
|
4787 GCPRO2 (stream, old_level);
|
|
|
4788
|
|
|
4789 if (NILP (stream))
|
|
|
4790 stream = Vstandard_output;
|
|
|
4791 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4792 stream = Fselected_frame (Qnil);
|
|
|
4793
|
|
|
4794 for (;;)
|
|
|
4795 {
|
|
|
4796 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4797 {
|
|
|
4798 int catchpdl = catches->pdlcount;
|
|
371
|
4799 if (specpdl[catchpdl].func == condition_case_unwind
|
|
|
4800 && speccount > catchpdl)
|
|
0
|
4801 /* This is a condition-case catchpoint */
|
|
|
4802 catchpdl = catchpdl + 1;
|
|
185
|
4803
|
|
0
|
4804 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4805
|
|
|
4806 speccount = catches->pdlcount;
|
|
|
4807 if (catchpdl == speccount)
|
|
|
4808 {
|
|
|
4809 write_c_string (" # (catch ", stream);
|
|
|
4810 Fprin1 (catches->tag, stream);
|
|
|
4811 write_c_string (" ...)\n", stream);
|
|
|
4812 }
|
|
|
4813 else
|
|
|
4814 {
|
|
|
4815 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4816 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4817 write_c_string (")\n", stream);
|
|
|
4818 }
|
|
|
4819 catches = catches->next;
|
|
|
4820 }
|
|
|
4821 else if (!backlist)
|
|
|
4822 break;
|
|
|
4823 else
|
|
|
4824 {
|
|
|
4825 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4826 {
|
|
|
4827 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4828 speccount = backlist->pdlcount;
|
|
|
4829 }
|
|
|
4830 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4831 stream);
|
|
|
4832 if (backlist->nargs == UNEVALLED)
|
|
|
4833 {
|
|
|
4834 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4835 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4836 }
|
|
|
4837 else
|
|
|
4838 {
|
|
|
4839 Lisp_Object tem = *backlist->function;
|
|
|
4840 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4841 write_c_string ("(", stream);
|
|
|
4842 if (backlist->nargs == MANY)
|
|
|
4843 {
|
|
|
4844 int i;
|
|
|
4845 Lisp_Object tail = Qnil;
|
|
|
4846 struct gcpro ngcpro1;
|
|
|
4847
|
|
|
4848 NGCPRO1 (tail);
|
|
|
4849 for (tail = *backlist->args, i = 0;
|
|
|
4850 !NILP (tail);
|
|
|
4851 tail = Fcdr (tail), i++)
|
|
|
4852 {
|
|
|
4853 if (i != 0) write_c_string (" ", stream);
|
|
|
4854 Fprin1 (Fcar (tail), stream);
|
|
|
4855 }
|
|
|
4856 NUNGCPRO;
|
|
|
4857 }
|
|
|
4858 else
|
|
|
4859 {
|
|
|
4860 int i;
|
|
|
4861 for (i = 0; i < backlist->nargs; i++)
|
|
|
4862 {
|
|
241
|
4863 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
4864 write_c_string("\"...\"", stream);
|
|
|
4865 continue;
|
|
|
4866 }
|
|
0
|
4867 if (i != 0) write_c_string (" ", stream);
|
|
|
4868 Fprin1 (backlist->args[i], stream);
|
|
|
4869 }
|
|
|
4870 }
|
|
|
4871 }
|
|
|
4872 write_c_string (")\n", stream);
|
|
|
4873 backlist = backlist->next;
|
|
|
4874 }
|
|
|
4875 }
|
|
|
4876 Vprint_level = old_level;
|
|
|
4877 print_readably = old_pr;
|
|
|
4878 print_escape_newlines = old_nl;
|
|
|
4879 UNGCPRO;
|
|
|
4880 Vinhibit_quit = oiq;
|
|
|
4881 return Qnil;
|
|
|
4882 }
|
|
|
4883
|
|
|
4884
|
|
20
|
4885 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
4886 Return the function and arguments N frames up from current execution point.
|
|
|
4887 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
4888 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
4889 If that frame has evaluated its arguments and called its function already,
|
|
|
4890 the value is (t FUNCTION ARG-VALUES...).
|
|
|
4891 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
4892 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
4893 or a lambda expression for macro calls.
|
|
|
4894 If N is more than the number of frames, the value is nil.
|
|
20
|
4895 */
|
|
|
4896 (nframes))
|
|
0
|
4897 {
|
|
|
4898 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4899 REGISTER int i;
|
|
|
4900 Lisp_Object tem;
|
|
|
4901
|
|
|
4902 CHECK_NATNUM (nframes);
|
|
|
4903
|
|
|
4904 /* Find the frame requested. */
|
|
|
4905 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
4906 backlist = backlist->next;
|
|
|
4907
|
|
|
4908 if (!backlist)
|
|
|
4909 return Qnil;
|
|
|
4910 if (backlist->nargs == UNEVALLED)
|
|
|
4911 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
4912 else
|
|
|
4913 {
|
|
|
4914 if (backlist->nargs == MANY)
|
|
|
4915 tem = *backlist->args;
|
|
|
4916 else
|
|
|
4917 tem = Flist (backlist->nargs, backlist->args);
|
|
|
4918
|
|
|
4919 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
4920 }
|
|
|
4921 }
|
|
|
4922
|
|
|
4923
|
|
380
|
4924 /************************************************************************/
|
|
|
4925 /* Warnings */
|
|
|
4926 /************************************************************************/
|
|
0
|
4927
|
|
|
4928 void
|
|
|
4929 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
4930 Lisp_Object obj)
|
|
|
4931 {
|
|
|
4932 obj = list1 (list3 (class, level, obj));
|
|
|
4933 if (NILP (Vpending_warnings))
|
|
|
4934 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
4935 else
|
|
|
4936 {
|
|
|
4937 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
4938 Vpending_warnings_tail = obj;
|
|
|
4939 }
|
|
|
4940 }
|
|
|
4941
|
|
|
4942 /* #### This should probably accept Lisp objects; but then we have
|
|
|
4943 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
4944
|
|
|
4945 An alternative approach is to just pass some non-string type of
|
|
380
|
4946 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
0
|
4947 automatically be called when it is safe to do so. */
|
|
|
4948
|
|
|
4949 void
|
|
|
4950 warn_when_safe (Lisp_Object class, Lisp_Object level, CONST char *fmt, ...)
|
|
|
4951 {
|
|
|
4952 Lisp_Object obj;
|
|
|
4953 va_list args;
|
|
|
4954
|
|
|
4955 va_start (args, fmt);
|
|
|
4956 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt),
|
|
|
4957 Qnil, -1, args);
|
|
|
4958 va_end (args);
|
|
|
4959
|
|
|
4960 warn_when_safe_lispobj (class, level, obj);
|
|
|
4961 }
|
|
|
4962
|
|
|
4963
|
|
|
4964
|
|
|
4965
|
|
380
|
4966 /************************************************************************/
|
|
|
4967 /* Initialization */
|
|
|
4968 /************************************************************************/
|
|
0
|
4969
|
|
|
4970 void
|
|
|
4971 syms_of_eval (void)
|
|
|
4972 {
|
|
|
4973 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
4974 defsymbol (&Qautoload, "autoload");
|
|
|
4975 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
4976 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
4977 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
4978 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
4979 defsymbol (&Qdebugger, "debugger");
|
|
|
4980 defsymbol (&Qmacro, "macro");
|
|
|
4981 defsymbol (&Qand_rest, "&rest");
|
|
|
4982 defsymbol (&Qand_optional, "&optional");
|
|
|
4983 /* Note that the process code also uses Qexit */
|
|
|
4984 defsymbol (&Qexit, "exit");
|
|
|
4985 defsymbol (&Qsetq, "setq");
|
|
|
4986 defsymbol (&Qinteractive, "interactive");
|
|
|
4987 defsymbol (&Qcommandp, "commandp");
|
|
|
4988 defsymbol (&Qdefun, "defun");
|
|
|
4989 defsymbol (&Qprogn, "progn");
|
|
|
4990 defsymbol (&Qvalues, "values");
|
|
|
4991 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
4992 defsymbol (&Qrun_hooks, "run-hooks");
|
|
380
|
4993 defsymbol (&Qif, "if");
|
|
0
|
4994
|
|
20
|
4995 DEFSUBR (For);
|
|
|
4996 DEFSUBR (Fand);
|
|
|
4997 DEFSUBR (Fif);
|
|
380
|
4998 DEFSUBR_MACRO (Fwhen);
|
|
|
4999 DEFSUBR_MACRO (Funless);
|
|
20
|
5000 DEFSUBR (Fcond);
|
|
|
5001 DEFSUBR (Fprogn);
|
|
|
5002 DEFSUBR (Fprog1);
|
|
|
5003 DEFSUBR (Fprog2);
|
|
|
5004 DEFSUBR (Fsetq);
|
|
|
5005 DEFSUBR (Fquote);
|
|
|
5006 DEFSUBR (Ffunction);
|
|
|
5007 DEFSUBR (Fdefun);
|
|
|
5008 DEFSUBR (Fdefmacro);
|
|
|
5009 DEFSUBR (Fdefvar);
|
|
|
5010 DEFSUBR (Fdefconst);
|
|
|
5011 DEFSUBR (Fuser_variable_p);
|
|
|
5012 DEFSUBR (Flet);
|
|
|
5013 DEFSUBR (FletX);
|
|
|
5014 DEFSUBR (Fwhile);
|
|
|
5015 DEFSUBR (Fmacroexpand_internal);
|
|
|
5016 DEFSUBR (Fcatch);
|
|
|
5017 DEFSUBR (Fthrow);
|
|
|
5018 DEFSUBR (Funwind_protect);
|
|
|
5019 DEFSUBR (Fcondition_case);
|
|
|
5020 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5021 DEFSUBR (Fsignal);
|
|
|
5022 DEFSUBR (Finteractive_p);
|
|
|
5023 DEFSUBR (Fcommandp);
|
|
|
5024 DEFSUBR (Fcommand_execute);
|
|
|
5025 DEFSUBR (Fautoload);
|
|
|
5026 DEFSUBR (Feval);
|
|
|
5027 DEFSUBR (Fapply);
|
|
|
5028 DEFSUBR (Ffuncall);
|
|
380
|
5029 DEFSUBR (Ffunctionp);
|
|
20
|
5030 DEFSUBR (Ffunction_min_args);
|
|
|
5031 DEFSUBR (Ffunction_max_args);
|
|
|
5032 DEFSUBR (Frun_hooks);
|
|
|
5033 DEFSUBR (Frun_hook_with_args);
|
|
|
5034 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5035 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5036 DEFSUBR (Fbacktrace_debug);
|
|
|
5037 DEFSUBR (Fbacktrace);
|
|
|
5038 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5039 }
|
|
|
5040
|
|
|
5041 void
|
|
|
5042 reinit_eval (void)
|
|
|
5043 {
|
|
|
5044 specpdl_ptr = specpdl;
|
|
|
5045 specpdl_depth_counter = 0;
|
|
|
5046 catchlist = 0;
|
|
|
5047 Vcondition_handlers = Qnil;
|
|
|
5048 backtrace_list = 0;
|
|
|
5049 Vquit_flag = Qnil;
|
|
|
5050 debug_on_next_call = 0;
|
|
|
5051 lisp_eval_depth = 0;
|
|
|
5052 entering_debugger = 0;
|
|
|
5053 }
|
|
|
5054
|
|
|
5055 void
|
|
|
5056 vars_of_eval (void)
|
|
|
5057 {
|
|
|
5058 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5059 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5060 */ );
|
|
|
5061
|
|
|
5062 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5063 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5064 This limit is to catch infinite recursions for you before they cause
|
|
|
5065 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5066 You can safely make it considerably larger than its default value,
|
|
|
5067 if that proves inconveniently small.
|
|
|
5068 */ );
|
|
|
5069
|
|
|
5070 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5071 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5072 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5073 */ );
|
|
|
5074 Vquit_flag = Qnil;
|
|
|
5075
|
|
|
5076 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5077 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5078 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5079 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5080 To prevent this happening, set `quit-flag' to nil
|
|
|
5081 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5082 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5083 an X frame.
|
|
|
5084 */ );
|
|
|
5085 Vinhibit_quit = Qnil;
|
|
|
5086
|
|
|
5087 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5088 *Non-nil means automatically display a backtrace buffer
|
|
|
5089 after any error that is not handled by a `condition-case'.
|
|
|
5090 If the value is a list, an error only means to display a backtrace
|
|
|
5091 if one of its condition symbols appears in the list.
|
|
|
5092 See also variable `stack-trace-on-signal'.
|
|
|
5093 */ );
|
|
|
5094 Vstack_trace_on_error = Qnil;
|
|
|
5095
|
|
|
5096 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5097 *Non-nil means automatically display a backtrace buffer
|
|
|
5098 after any error that is signalled, whether or not it is handled by
|
|
|
5099 a `condition-case'.
|
|
|
5100 If the value is a list, an error only means to display a backtrace
|
|
|
5101 if one of its condition symbols appears in the list.
|
|
|
5102 See also variable `stack-trace-on-error'.
|
|
|
5103 */ );
|
|
|
5104 Vstack_trace_on_signal = Qnil;
|
|
|
5105
|
|
163
|
5106 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5107 *List of errors for which the debugger should not be called.
|
|
|
5108 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5109 If any element applies to a given error, that error skips the debugger
|
|
|
5110 and just returns to top level.
|
|
|
5111 This overrides the variable `debug-on-error'.
|
|
|
5112 It does not apply to errors handled by `condition-case'.
|
|
|
5113 */ );
|
|
|
5114 Vdebug_ignored_errors = Qnil;
|
|
|
5115
|
|
0
|
5116 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5117 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5118 The debugger will not be entered if the error is handled by
|
|
|
5119 a `condition-case'.
|
|
|
5120 If the value is a list, an error only means to enter the debugger
|
|
|
5121 if one of its condition symbols appears in the list.
|
|
181
|
5122 This variable is overridden by `debug-ignored-errors'.
|
|
0
|
5123 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5124 */ );
|
|
|
5125 Vdebug_on_error = Qnil;
|
|
|
5126
|
|
|
5127 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5128 *Non-nil means enter debugger if an error is signalled.
|
|
|
5129 The debugger will be entered whether or not the error is handled by
|
|
|
5130 a `condition-case'.
|
|
|
5131 If the value is a list, an error only means to enter the debugger
|
|
|
5132 if one of its condition symbols appears in the list.
|
|
|
5133 See also variable `debug-on-quit'.
|
|
|
5134 */ );
|
|
|
5135 Vdebug_on_signal = Qnil;
|
|
|
5136
|
|
|
5137 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5138 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5139 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5140 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5141 control-shift-G to signal a critical quit.
|
|
|
5142 */ );
|
|
|
5143 debug_on_quit = 0;
|
|
|
5144
|
|
|
5145 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5146 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5147 */ );
|
|
|
5148
|
|
|
5149 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5150 Function to call to invoke debugger.
|
|
|
5151 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5152 this function's value will be returned instead of that.
|
|
|
5153 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5154 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5155 If due to `eval' entry, one arg, t.
|
|
|
5156 */ );
|
|
|
5157 Vdebugger = Qnil;
|
|
|
5158
|
|
|
5159 preparing_for_armageddon = 0;
|
|
|
5160
|
|
|
5161 staticpro (&Vpending_warnings);
|
|
|
5162 Vpending_warnings = Qnil;
|
|
|
5163 Vpending_warnings_tail = Qnil; /* no need to protect this */
|
|
|
5164
|
|
|
5165 in_warnings = 0;
|
|
|
5166
|
|
|
5167 staticpro (&Vautoload_queue);
|
|
|
5168 Vautoload_queue = Qnil;
|
|
|
5169
|
|
|
5170 staticpro (&Vcondition_handlers);
|
|
|
5171
|
|
|
5172 staticpro (&Vcurrent_warning_class);
|
|
|
5173 Vcurrent_warning_class = Qnil;
|
|
|
5174
|
|
|
5175 staticpro (&Vcurrent_error_state);
|
|
|
5176 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5177
|
|
|
5178 Qunbound_suspended_errors_tag = make_opaque_long (0);
|
|
|
5179 staticpro (&Qunbound_suspended_errors_tag);
|
|
|
5180
|
|
|
5181 specpdl_size = 50;
|
|
|
5182 specpdl_depth_counter = 0;
|
|
185
|
5183 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
0
|
5184 /* XEmacs change: increase these values. */
|
|
|
5185 max_specpdl_size = 3000;
|
|
371
|
5186 max_lisp_eval_depth = 500;
|
|
380
|
5187 #if 0 /* no longer used */
|
|
0
|
5188 throw_level = 0;
|
|
380
|
5189 #endif
|
|
0
|
5190
|
|
|
5191 reinit_eval ();
|
|
|
5192 }
|
