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428
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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442
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4 Copyright (C) 2000 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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24
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25 #include <config.h>
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26 #include "lisp.h"
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27
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28 #include "commands.h"
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29 #include "backtrace.h"
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30 #include "bytecode.h"
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31 #include "buffer.h"
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32 #include "console.h"
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33 #include "opaque.h"
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34
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35 #ifdef ERROR_CHECK_GC
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36 int always_gc; /* Debugging hack */
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37 #else
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38 #define always_gc 0
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39 #endif
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40
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41 struct backtrace *backtrace_list;
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42
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43 /* Note: you must always fill in all of the fields in a backtrace structure
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44 before pushing them on the backtrace_list. The profiling code depends
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45 on this. */
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46
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47 #define PUSH_BACKTRACE(bt) do { \
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48 (bt).next = backtrace_list; \
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49 backtrace_list = &(bt); \
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50 } while (0)
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51
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52 #define POP_BACKTRACE(bt) do { \
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53 backtrace_list = (bt).next; \
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54 } while (0)
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55
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56 /* Macros for calling subrs with an argument list whose length is only
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57 known at runtime. See EXFUN and DEFUN for similar hackery. */
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58
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59 #define AV_0(av)
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60 #define AV_1(av) av[0]
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61 #define AV_2(av) AV_1(av), av[1]
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62 #define AV_3(av) AV_2(av), av[2]
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63 #define AV_4(av) AV_3(av), av[3]
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64 #define AV_5(av) AV_4(av), av[4]
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65 #define AV_6(av) AV_5(av), av[5]
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66 #define AV_7(av) AV_6(av), av[6]
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67 #define AV_8(av) AV_7(av), av[7]
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68
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69 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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70 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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71
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72 /* If subrs take more than 8 arguments, more cases need to be added
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73 to this switch. (But wait - don't do it - if you really need
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74 a SUBR with more than 8 arguments, use max_args == MANY.
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75 See the DEFUN macro in lisp.h) */
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76 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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77 void (*PF_fn)(void) = (void (*)(void)) fn; \
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78 Lisp_Object *PF_av = (av); \
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79 switch (ac) \
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80 { \
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436
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81 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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428
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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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96
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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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115
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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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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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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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130 Lisp_Object Qif;
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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 record all fset's and provide's, to be undone
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148 if the file being autoloaded is not fully loaded.
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149 They are recorded by being consed onto the front of Vautoload_queue:
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150 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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151 Lisp_Object Vautoload_queue;
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152
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153 /* Current number of specbindings allocated in specpdl. */
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154 int specpdl_size;
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155
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156 /* Pointer to beginning of specpdl. */
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157 struct specbinding *specpdl;
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158
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159 /* Pointer to first unused element in specpdl. */
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160 struct specbinding *specpdl_ptr;
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161
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162 /* specpdl_ptr - specpdl */
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163 int specpdl_depth_counter;
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164
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165 /* Maximum size allowed for specpdl allocation */
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166 int max_specpdl_size;
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167
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168 /* Depth in Lisp evaluations and function calls. */
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169 static int lisp_eval_depth;
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170
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171 /* Maximum allowed depth in Lisp evaluations and function calls. */
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172 int max_lisp_eval_depth;
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173
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174 /* Nonzero means enter debugger before next function call */
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175 static int debug_on_next_call;
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176
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177 /* List of conditions (non-nil atom means all) which cause a backtrace
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178 if an error is handled by the command loop's error handler. */
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179 Lisp_Object Vstack_trace_on_error;
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180
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181 /* List of conditions (non-nil atom means all) which enter the debugger
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182 if an error is handled by the command loop's error handler. */
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183 Lisp_Object Vdebug_on_error;
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184
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185 /* List of conditions and regexps specifying error messages which
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186 do not enter the debugger even if Vdebug_on_error says they should. */
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187 Lisp_Object Vdebug_ignored_errors;
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188
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189 /* List of conditions (non-nil atom means all) which cause a backtrace
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190 if any error is signalled. */
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191 Lisp_Object Vstack_trace_on_signal;
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192
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193 /* List of conditions (non-nil atom means all) which enter the debugger
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194 if any error is signalled. */
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195 Lisp_Object Vdebug_on_signal;
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196
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197 /* Nonzero means enter debugger if a quit signal
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198 is handled by the command loop's error handler.
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199
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200 From lisp, this is a boolean variable and may have the values 0 and 1.
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201 But, eval.c temporarily uses the second bit of this variable to indicate
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202 that a critical_quit is in progress. The second bit is reset immediately
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203 after it is processed in signal_call_debugger(). */
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204 int debug_on_quit;
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205
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206 #if 0 /* FSFmacs */
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207 /* entering_debugger is basically equivalent */
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208 /* The value of num_nonmacro_input_chars as of the last time we
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209 started to enter the debugger. If we decide to enter the debugger
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210 again when this is still equal to num_nonmacro_input_chars, then we
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211 know that the debugger itself has an error, and we should just
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212 signal the error instead of entering an infinite loop of debugger
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213 invocations. */
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214 int when_entered_debugger;
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215 #endif
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216
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217 /* Nonzero means we are trying to enter the debugger.
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218 This is to prevent recursive attempts.
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219 Cleared by the debugger calling Fbacktrace */
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220 static int entering_debugger;
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221
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222 /* Function to call to invoke the debugger */
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223 Lisp_Object Vdebugger;
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224
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225 /* Chain of condition handlers currently in effect.
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226 The elements of this chain are contained in the stack frames
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227 of Fcondition_case and internal_condition_case.
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228 When an error is signaled (by calling Fsignal, below),
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229 this chain is searched for an element that applies.
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230
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231 Each element of this list is one of the following:
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232
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233 A list of a handler function and possibly args to pass to
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234 the function. This is a handler established with
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235 `call-with-condition-handler' (q.v.).
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236
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237 A list whose car is Qunbound and whose cdr is Qt.
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238 This is a special condition-case handler established
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239 by C code with condition_case_1(). All errors are
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240 trapped; the debugger is not invoked even if
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241 `debug-on-error' was set.
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242
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243 A list whose car is Qunbound and whose cdr is Qerror.
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244 This is a special condition-case handler established
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245 by C code with condition_case_1(). It is like Qt
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246 except that the debugger is invoked normally if it is
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247 called for.
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248
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249 A list whose car is Qunbound and whose cdr is a list
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250 of lists (CONDITION-NAME BODY ...) exactly as in
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251 `condition-case'. This is a normal `condition-case'
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252 handler.
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253
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254 Note that in all cases *except* the first, there is a
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255 corresponding catch, whose TAG is the value of
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256 Vcondition_handlers just after the handler data just
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257 described is pushed onto it. The reason is that
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258 `condition-case' handlers need to throw back to the
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259 place where the handler was installed before invoking
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260 it, while `call-with-condition-handler' handlers are
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261 invoked in the environment that `signal' was invoked
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262 in.
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263 */
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264 static Lisp_Object Vcondition_handlers;
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265
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266
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442
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267 #define DEFEND_AGAINST_THROW_RECURSION
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268
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269 #ifdef DEFEND_AGAINST_THROW_RECURSION
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428
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270 /* Used for error catching purposes by throw_or_bomb_out */
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271 static int throw_level;
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442
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272 #endif
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273
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274 #ifdef ERROR_CHECK_TYPECHECK
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275 void check_error_state_sanity (void);
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276 #endif
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428
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277
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278
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279 /************************************************************************/
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280 /* The subr object type */
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281 /************************************************************************/
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282
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283 static void
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284 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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285 {
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286 Lisp_Subr *subr = XSUBR (obj);
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442
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287 const char *header =
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428
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288 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
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442
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289 const char *name = subr_name (subr);
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290 const char *trailer = subr->prompt ? " (interactive)>" : ">";
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428
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291
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292 if (print_readably)
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293 error ("printing unreadable object %s%s%s", header, name, trailer);
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294
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295 write_c_string (header, printcharfun);
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296 write_c_string (name, printcharfun);
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297 write_c_string (trailer, printcharfun);
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298 }
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299
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300 static const struct lrecord_description subr_description[] = {
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440
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301 { XD_DOC_STRING, offsetof (Lisp_Subr, doc) },
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428
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302 { XD_END }
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303 };
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304
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305 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
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442
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306 0, print_subr, 0, 0, 0,
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428
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307 subr_description,
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308 Lisp_Subr);
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309
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310 /************************************************************************/
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311 /* Entering the debugger */
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312 /************************************************************************/
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313
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314 /* unwind-protect used by call_debugger() to restore the value of
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315 entering_debugger. (We cannot use specbind() because the
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316 variable is not Lisp-accessible.) */
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317
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318 static Lisp_Object
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319 restore_entering_debugger (Lisp_Object arg)
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320 {
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321 entering_debugger = ! NILP (arg);
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322 return arg;
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323 }
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324
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325 /* Actually call the debugger. ARG is a list of args that will be
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326 passed to the debugger function, as follows;
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327
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328 If due to frame exit, args are `exit' and the value being returned;
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329 this function's value will be returned instead of that.
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330 If due to error, args are `error' and a list of the args to `signal'.
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331 If due to `apply' or `funcall' entry, one arg, `lambda'.
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332 If due to `eval' entry, one arg, t.
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333
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334 */
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335
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336 static Lisp_Object
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337 call_debugger_259 (Lisp_Object arg)
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338 {
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339 return apply1 (Vdebugger, arg);
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340 }
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341
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342 /* Call the debugger, doing some encapsulation. We make sure we have
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343 some room on the eval and specpdl stacks, and bind entering_debugger
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344 to 1 during this call. This is used to trap errors that may occur
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345 when entering the debugger (e.g. the value of `debugger' is invalid),
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346 so that the debugger will not be recursively entered if debug-on-error
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347 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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348 enter the debugger.) entering_debugger gets reset to 0 as soon
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349 as a backtrace is displayed, so that further errors can indeed be
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350 handled normally.
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351
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352 We also establish a catch for 'debugger. If the debugger function
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353 throws to this instead of returning a value, it means that the user
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354 pressed 'c' (pretend like the debugger was never entered). The
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355 function then returns Qunbound. (If the user pressed 'r', for
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356 return a value, then the debugger function returns normally with
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357 this value.)
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358
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359 The difference between 'c' and 'r' is as follows:
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360
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361 debug-on-call:
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362 No difference. The call proceeds as normal.
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363 debug-on-exit:
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364 With 'r', the specified value is returned as the function's
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365 return value. With 'c', the value that would normally be
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366 returned is returned.
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367 signal:
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368 With 'r', the specified value is returned as the return
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369 value of `signal'. (This is the only time that `signal'
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370 can return, instead of making a non-local exit.) With `c',
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371 `signal' will continue looking for handlers as if the
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372 debugger was never entered, and will probably end up
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373 throwing to a handler or to top-level.
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374 */
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375
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376 static Lisp_Object
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377 call_debugger (Lisp_Object arg)
|
|
|
378 {
|
|
|
379 int threw;
|
|
|
380 Lisp_Object val;
|
|
|
381 int speccount;
|
|
|
382
|
|
|
383 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
384 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
385 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
386 max_specpdl_size = specpdl_size + 40;
|
|
|
387 debug_on_next_call = 0;
|
|
|
388
|
|
|
389 speccount = specpdl_depth();
|
|
|
390 record_unwind_protect (restore_entering_debugger,
|
|
|
391 (entering_debugger ? Qt : Qnil));
|
|
|
392 entering_debugger = 1;
|
|
|
393 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
394
|
|
|
395 return unbind_to (speccount, ((threw)
|
|
|
396 ? Qunbound /* Not returning a value */
|
|
|
397 : val));
|
|
|
398 }
|
|
|
399
|
|
|
400 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
401 with the appropriate args for this. VAL is the exit value that is
|
|
|
402 about to be returned. */
|
|
|
403
|
|
|
404 static Lisp_Object
|
|
|
405 do_debug_on_exit (Lisp_Object val)
|
|
|
406 {
|
|
|
407 /* This is falsified by call_debugger */
|
|
|
408 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
|
409
|
|
|
410 return !UNBOUNDP (v) ? v : val;
|
|
|
411 }
|
|
|
412
|
|
|
413 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
414 with the appropriate args for this. VAL is either t for a call
|
|
|
415 through `eval' or 'lambda for a call through `funcall'.
|
|
|
416
|
|
|
417 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
418 FUNCALL can be defined as
|
|
|
419
|
|
|
420 (defmacro func (fun &rest args)
|
|
|
421 (cons (eval fun) args))
|
|
|
422
|
|
|
423 and should be treated as such.
|
|
|
424 */
|
|
|
425
|
|
|
426 static void
|
|
|
427 do_debug_on_call (Lisp_Object code)
|
|
|
428 {
|
|
|
429 debug_on_next_call = 0;
|
|
|
430 backtrace_list->debug_on_exit = 1;
|
|
|
431 call_debugger (list1 (code));
|
|
|
432 }
|
|
|
433
|
|
|
434 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
435 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
436 and CONDITIONS is the list of error conditions associated with
|
|
|
437 the error being signalled. This returns non-nil if LIST
|
|
|
438 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
439 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
440 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
441 same as one of the symbols in CONDITIONS.) */
|
|
|
442
|
|
|
443 static int
|
|
|
444 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
445 {
|
|
|
446 if (NILP (list))
|
|
|
447 return 0;
|
|
|
448 if (! CONSP (list))
|
|
|
449 return 1;
|
|
|
450
|
|
|
451 while (CONSP (conditions))
|
|
|
452 {
|
|
|
453 Lisp_Object this, tail;
|
|
|
454 this = XCAR (conditions);
|
|
|
455 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
456 if (EQ (XCAR (tail), this))
|
|
|
457 return 1;
|
|
|
458 conditions = XCDR (conditions);
|
|
|
459 }
|
|
|
460 return 0;
|
|
|
461 }
|
|
|
462
|
|
|
463
|
|
|
464 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
465 and described by SIGNAL-DATA, should skip the debugger
|
|
|
466 according to debugger-ignore-errors. */
|
|
|
467
|
|
|
468 static int
|
|
|
469 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
470 {
|
|
|
471 /* This function can GC */
|
|
|
472 Lisp_Object tail;
|
|
|
473 int first_string = 1;
|
|
|
474 Lisp_Object error_message = Qnil;
|
|
|
475
|
|
|
476 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
477 {
|
|
|
478 if (STRINGP (XCAR (tail)))
|
|
|
479 {
|
|
|
480 if (first_string)
|
|
|
481 {
|
|
|
482 error_message = Ferror_message_string (data);
|
|
|
483 first_string = 0;
|
|
|
484 }
|
|
|
485 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
486 return 1;
|
|
|
487 }
|
|
|
488 else
|
|
|
489 {
|
|
|
490 Lisp_Object contail;
|
|
|
491
|
|
|
492 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
493 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
494 return 1;
|
|
|
495 }
|
|
|
496 }
|
|
|
497
|
|
|
498 return 0;
|
|
|
499 }
|
|
|
500
|
|
|
501 /* Actually generate a backtrace on STREAM. */
|
|
|
502
|
|
|
503 static Lisp_Object
|
|
|
504 backtrace_259 (Lisp_Object stream)
|
|
|
505 {
|
|
|
506 return Fbacktrace (stream, Qt);
|
|
|
507 }
|
|
|
508
|
|
|
509 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
|
510 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
511 associated with the error being signalled. SIG is the actual error
|
|
|
512 being signalled, and DATA is the associated data (these are exactly
|
|
|
513 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
514 list of error handlers that are to be put in place while the debugger
|
|
|
515 is called. This is generally the remaining handlers that are
|
|
|
516 outside of the innermost handler trapping this error. This way,
|
|
|
517 if the same error occurs inside of the debugger, you usually don't get
|
|
|
518 the debugger entered recursively.
|
|
|
519
|
|
|
520 This function returns Qunbound if it didn't call the debugger or if
|
|
|
521 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
522 debugger was never entered. Otherwise, it returns the value
|
|
|
523 that the user specified with `r'. (Note that much of the time,
|
|
|
524 the user will abort with C-], and we will never have a chance to
|
|
|
525 return anything at all.)
|
|
|
526
|
|
|
527 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
528 and stack-trace-on-signal to control whether we do anything.
|
|
|
529 This is so that debug-on-error doesn't make handled errors
|
|
|
530 cause the debugger to get invoked.
|
|
|
531
|
|
|
532 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
533 those functions aren't done more than once in a single `signal'
|
|
|
534 session. */
|
|
|
535
|
|
|
536 static Lisp_Object
|
|
|
537 signal_call_debugger (Lisp_Object conditions,
|
|
|
538 Lisp_Object sig, Lisp_Object data,
|
|
|
539 Lisp_Object active_handlers,
|
|
|
540 int signal_vars_only,
|
|
|
541 int *stack_trace_displayed,
|
|
|
542 int *debugger_entered)
|
|
|
543 {
|
|
|
544 /* This function can GC */
|
|
|
545 Lisp_Object val = Qunbound;
|
|
|
546 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
547 Lisp_Object temp_data = Qnil;
|
|
|
548 int speccount = specpdl_depth();
|
|
|
549 struct gcpro gcpro1, gcpro2;
|
|
|
550 GCPRO2 (all_handlers, temp_data);
|
|
|
551
|
|
|
552 Vcondition_handlers = active_handlers;
|
|
|
553
|
|
|
554 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
|
555
|
|
|
556 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
557 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
558 && !skip_debugger (conditions, temp_data))
|
|
|
559 {
|
|
|
560 specbind (Qdebug_on_error, Qnil);
|
|
|
561 specbind (Qstack_trace_on_error, Qnil);
|
|
|
562 specbind (Qdebug_on_signal, Qnil);
|
|
|
563 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
564
|
|
442
|
565 if (!noninteractive)
|
|
|
566 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
567 backtrace_259,
|
|
|
568 Qnil,
|
|
|
569 Qnil);
|
|
|
570 else /* in batch mode, we want this going to stderr. */
|
|
|
571 backtrace_259 (Qnil);
|
|
428
|
572 unbind_to (speccount, Qnil);
|
|
|
573 *stack_trace_displayed = 1;
|
|
|
574 }
|
|
|
575
|
|
|
576 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
577 && (EQ (sig, Qquit)
|
|
|
578 ? debug_on_quit
|
|
|
579 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
580 && !skip_debugger (conditions, temp_data))
|
|
|
581 {
|
|
|
582 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
583 specbind (Qdebug_on_error, Qnil);
|
|
|
584 specbind (Qstack_trace_on_error, Qnil);
|
|
|
585 specbind (Qdebug_on_signal, Qnil);
|
|
|
586 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
587
|
|
|
588 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
589 *debugger_entered = 1;
|
|
|
590 }
|
|
|
591
|
|
|
592 if (!entering_debugger && !*stack_trace_displayed
|
|
|
593 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
594 {
|
|
|
595 specbind (Qdebug_on_error, Qnil);
|
|
|
596 specbind (Qstack_trace_on_error, Qnil);
|
|
|
597 specbind (Qdebug_on_signal, Qnil);
|
|
|
598 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
599
|
|
442
|
600 if (!noninteractive)
|
|
|
601 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
602 backtrace_259,
|
|
|
603 Qnil,
|
|
|
604 Qnil);
|
|
|
605 else /* in batch mode, we want this going to stderr. */
|
|
|
606 backtrace_259 (Qnil);
|
|
428
|
607 unbind_to (speccount, Qnil);
|
|
|
608 *stack_trace_displayed = 1;
|
|
|
609 }
|
|
|
610
|
|
|
611 if (!entering_debugger && !*debugger_entered
|
|
|
612 && (EQ (sig, Qquit)
|
|
|
613 ? debug_on_quit
|
|
|
614 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
615 {
|
|
|
616 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
617 specbind (Qdebug_on_error, Qnil);
|
|
|
618 specbind (Qstack_trace_on_error, Qnil);
|
|
|
619 specbind (Qdebug_on_signal, Qnil);
|
|
|
620 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
621
|
|
|
622 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
623 *debugger_entered = 1;
|
|
|
624 }
|
|
|
625
|
|
|
626 UNGCPRO;
|
|
|
627 Vcondition_handlers = all_handlers;
|
|
|
628 return unbind_to (speccount, val);
|
|
|
629 }
|
|
|
630
|
|
|
631
|
|
|
632 /************************************************************************/
|
|
|
633 /* The basic special forms */
|
|
|
634 /************************************************************************/
|
|
|
635
|
|
|
636 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
637 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
|
638
|
|
|
639 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
|
640 Eval args until one of them yields non-nil, then return that value.
|
|
|
641 The remaining args are not evalled at all.
|
|
|
642 If all args return nil, return nil.
|
|
|
643 */
|
|
|
644 (args))
|
|
|
645 {
|
|
|
646 /* This function can GC */
|
|
442
|
647 REGISTER Lisp_Object val;
|
|
428
|
648
|
|
|
649 LIST_LOOP_2 (arg, args)
|
|
|
650 {
|
|
|
651 if (!NILP (val = Feval (arg)))
|
|
|
652 return val;
|
|
|
653 }
|
|
|
654
|
|
|
655 return Qnil;
|
|
|
656 }
|
|
|
657
|
|
|
658 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
|
659 Eval args until one of them yields nil, then return nil.
|
|
|
660 The remaining args are not evalled at all.
|
|
|
661 If no arg yields nil, return the last arg's value.
|
|
|
662 */
|
|
|
663 (args))
|
|
|
664 {
|
|
|
665 /* This function can GC */
|
|
442
|
666 REGISTER Lisp_Object val = Qt;
|
|
428
|
667
|
|
|
668 LIST_LOOP_2 (arg, args)
|
|
|
669 {
|
|
|
670 if (NILP (val = Feval (arg)))
|
|
|
671 return val;
|
|
|
672 }
|
|
|
673
|
|
|
674 return val;
|
|
|
675 }
|
|
|
676
|
|
|
677 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
|
678 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
679 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
680 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
681 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
|
682 */
|
|
|
683 (args))
|
|
|
684 {
|
|
|
685 /* This function can GC */
|
|
|
686 Lisp_Object condition = XCAR (args);
|
|
|
687 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
688 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
689
|
|
|
690 if (!NILP (Feval (condition)))
|
|
|
691 return Feval (then_form);
|
|
|
692 else
|
|
|
693 return Fprogn (else_forms);
|
|
|
694 }
|
|
|
695
|
|
|
696 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
697 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
698
|
|
|
699 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
700 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
701 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
702 */
|
|
|
703 (int nargs, Lisp_Object *args))
|
|
|
704 {
|
|
|
705 Lisp_Object cond = args[0];
|
|
|
706 Lisp_Object body;
|
|
|
707
|
|
|
708 switch (nargs)
|
|
|
709 {
|
|
|
710 case 1: body = Qnil; break;
|
|
|
711 case 2: body = args[1]; break;
|
|
|
712 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
713 }
|
|
|
714
|
|
|
715 return list3 (Qif, cond, body);
|
|
|
716 }
|
|
|
717
|
|
|
718 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
719 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
720 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
721 */
|
|
|
722 (int nargs, Lisp_Object *args))
|
|
|
723 {
|
|
|
724 Lisp_Object cond = args[0];
|
|
|
725 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
726 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
|
727 }
|
|
|
728
|
|
|
729 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
|
730 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
731 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
732 and, if the value is non-nil, this clause succeeds:
|
|
|
733 then the expressions in BODY are evaluated and the last one's
|
|
|
734 value is the value of the cond-form.
|
|
|
735 If no clause succeeds, cond returns nil.
|
|
|
736 If a clause has one element, as in (CONDITION),
|
|
|
737 CONDITION's value if non-nil is returned from the cond-form.
|
|
|
738 */
|
|
|
739 (args))
|
|
|
740 {
|
|
|
741 /* This function can GC */
|
|
442
|
742 REGISTER Lisp_Object val;
|
|
428
|
743
|
|
|
744 LIST_LOOP_2 (clause, args)
|
|
|
745 {
|
|
|
746 CHECK_CONS (clause);
|
|
|
747 if (!NILP (val = Feval (XCAR (clause))))
|
|
|
748 {
|
|
|
749 if (!NILP (clause = XCDR (clause)))
|
|
|
750 {
|
|
|
751 CHECK_TRUE_LIST (clause);
|
|
|
752 val = Fprogn (clause);
|
|
|
753 }
|
|
|
754 return val;
|
|
|
755 }
|
|
|
756 }
|
|
|
757
|
|
|
758 return Qnil;
|
|
|
759 }
|
|
|
760
|
|
|
761 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
|
762 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
|
763 */
|
|
|
764 (args))
|
|
|
765 {
|
|
|
766 /* This function can GC */
|
|
|
767 /* Caller must provide a true list in ARGS */
|
|
442
|
768 REGISTER Lisp_Object val = Qnil;
|
|
428
|
769 struct gcpro gcpro1;
|
|
|
770
|
|
|
771 GCPRO1 (args);
|
|
|
772
|
|
|
773 {
|
|
|
774 LIST_LOOP_2 (form, args)
|
|
|
775 val = Feval (form);
|
|
|
776 }
|
|
|
777
|
|
|
778 UNGCPRO;
|
|
|
779 return val;
|
|
|
780 }
|
|
|
781
|
|
|
782 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
783 Lisp_Object across calls to Feval(). */
|
|
|
784
|
|
|
785 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
|
786 Similar to `progn', but the value of the first form is returned.
|
|
|
787 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
788 The value of FIRST is saved during evaluation of the remaining args,
|
|
|
789 whose values are discarded.
|
|
|
790 */
|
|
|
791 (args))
|
|
|
792 {
|
|
|
793 /* This function can GC */
|
|
442
|
794 REGISTER Lisp_Object val;
|
|
428
|
795 struct gcpro gcpro1;
|
|
|
796
|
|
|
797 val = Feval (XCAR (args));
|
|
|
798
|
|
|
799 GCPRO1 (val);
|
|
|
800
|
|
|
801 {
|
|
|
802 LIST_LOOP_2 (form, XCDR (args))
|
|
|
803 Feval (form);
|
|
|
804 }
|
|
|
805
|
|
|
806 UNGCPRO;
|
|
|
807 return val;
|
|
|
808 }
|
|
|
809
|
|
|
810 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
|
811 Similar to `progn', but the value of the second form is returned.
|
|
|
812 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
813 The value of SECOND is saved during evaluation of the remaining args,
|
|
|
814 whose values are discarded.
|
|
|
815 */
|
|
|
816 (args))
|
|
|
817 {
|
|
|
818 /* This function can GC */
|
|
442
|
819 REGISTER Lisp_Object val;
|
|
428
|
820 struct gcpro gcpro1;
|
|
|
821
|
|
|
822 Feval (XCAR (args));
|
|
|
823 args = XCDR (args);
|
|
|
824 val = Feval (XCAR (args));
|
|
|
825 args = XCDR (args);
|
|
|
826
|
|
|
827 GCPRO1 (val);
|
|
|
828
|
|
442
|
829 {
|
|
|
830 LIST_LOOP_2 (form, args)
|
|
|
831 Feval (form);
|
|
|
832 }
|
|
428
|
833
|
|
|
834 UNGCPRO;
|
|
|
835 return val;
|
|
|
836 }
|
|
|
837
|
|
|
838 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
|
839 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
840 The value of the last form in BODY is returned.
|
|
|
841 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
842 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
843 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
|
844 */
|
|
|
845 (args))
|
|
|
846 {
|
|
|
847 /* This function can GC */
|
|
|
848 Lisp_Object varlist = XCAR (args);
|
|
|
849 Lisp_Object body = XCDR (args);
|
|
|
850 int speccount = specpdl_depth();
|
|
|
851
|
|
|
852 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
|
853 {
|
|
|
854 Lisp_Object symbol, value, tem;
|
|
|
855 if (SYMBOLP (var))
|
|
|
856 symbol = var, value = Qnil;
|
|
|
857 else
|
|
|
858 {
|
|
|
859 CHECK_CONS (var);
|
|
|
860 symbol = XCAR (var);
|
|
|
861 tem = XCDR (var);
|
|
|
862 if (NILP (tem))
|
|
|
863 value = Qnil;
|
|
|
864 else
|
|
|
865 {
|
|
|
866 CHECK_CONS (tem);
|
|
|
867 value = Feval (XCAR (tem));
|
|
|
868 if (!NILP (XCDR (tem)))
|
|
|
869 signal_simple_error
|
|
|
870 ("`let' bindings can have only one value-form", var);
|
|
|
871 }
|
|
|
872 }
|
|
|
873 specbind (symbol, value);
|
|
|
874 }
|
|
|
875 return unbind_to (speccount, Fprogn (body));
|
|
|
876 }
|
|
|
877
|
|
|
878 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
|
879 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
880 The value of the last form in BODY is returned.
|
|
|
881 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
882 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
883 All the VALUEFORMs are evalled before any symbols are bound.
|
|
|
884 */
|
|
|
885 (args))
|
|
|
886 {
|
|
|
887 /* This function can GC */
|
|
|
888 Lisp_Object varlist = XCAR (args);
|
|
|
889 Lisp_Object body = XCDR (args);
|
|
|
890 int speccount = specpdl_depth();
|
|
|
891 Lisp_Object *temps;
|
|
|
892 int idx;
|
|
|
893 struct gcpro gcpro1;
|
|
|
894
|
|
|
895 /* Make space to hold the values to give the bound variables. */
|
|
|
896 {
|
|
|
897 int varcount;
|
|
|
898 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
|
899 temps = alloca_array (Lisp_Object, varcount);
|
|
|
900 }
|
|
|
901
|
|
|
902 /* Compute the values and store them in `temps' */
|
|
|
903 GCPRO1 (*temps);
|
|
|
904 gcpro1.nvars = 0;
|
|
|
905
|
|
|
906 idx = 0;
|
|
442
|
907 {
|
|
|
908 LIST_LOOP_2 (var, varlist)
|
|
|
909 {
|
|
|
910 Lisp_Object *value = &temps[idx++];
|
|
|
911 if (SYMBOLP (var))
|
|
|
912 *value = Qnil;
|
|
|
913 else
|
|
|
914 {
|
|
|
915 Lisp_Object tem;
|
|
|
916 CHECK_CONS (var);
|
|
|
917 tem = XCDR (var);
|
|
|
918 if (NILP (tem))
|
|
|
919 *value = Qnil;
|
|
|
920 else
|
|
|
921 {
|
|
|
922 CHECK_CONS (tem);
|
|
|
923 *value = Feval (XCAR (tem));
|
|
|
924 gcpro1.nvars = idx;
|
|
|
925
|
|
|
926 if (!NILP (XCDR (tem)))
|
|
|
927 signal_simple_error
|
|
|
928 ("`let' bindings can have only one value-form", var);
|
|
|
929 }
|
|
|
930 }
|
|
|
931 }
|
|
|
932 }
|
|
428
|
933
|
|
|
934 idx = 0;
|
|
442
|
935 {
|
|
|
936 LIST_LOOP_2 (var, varlist)
|
|
|
937 {
|
|
|
938 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
|
939 }
|
|
|
940 }
|
|
428
|
941
|
|
|
942 UNGCPRO;
|
|
|
943
|
|
|
944 return unbind_to (speccount, Fprogn (body));
|
|
|
945 }
|
|
|
946
|
|
|
947 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
|
948 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
949 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
950 until TEST returns nil.
|
|
|
951 */
|
|
|
952 (args))
|
|
|
953 {
|
|
|
954 /* This function can GC */
|
|
|
955 Lisp_Object test = XCAR (args);
|
|
|
956 Lisp_Object body = XCDR (args);
|
|
|
957
|
|
|
958 while (!NILP (Feval (test)))
|
|
|
959 {
|
|
|
960 QUIT;
|
|
|
961 Fprogn (body);
|
|
|
962 }
|
|
|
963
|
|
|
964 return Qnil;
|
|
|
965 }
|
|
|
966
|
|
|
967 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
|
968 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
969 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
970 The values VAL are expressions; they are evaluated.
|
|
|
971 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
972 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
973 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
974 The return value of the `setq' form is the value of the last VAL.
|
|
|
975 */
|
|
|
976 (args))
|
|
|
977 {
|
|
|
978 /* This function can GC */
|
|
|
979 Lisp_Object symbol, tail, val = Qnil;
|
|
|
980 int nargs;
|
|
|
981 struct gcpro gcpro1;
|
|
|
982
|
|
|
983 GET_LIST_LENGTH (args, nargs);
|
|
|
984
|
|
|
985 if (nargs & 1) /* Odd number of arguments? */
|
|
|
986 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
987
|
|
|
988 GCPRO1 (val);
|
|
|
989
|
|
|
990 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
|
991 {
|
|
|
992 val = Feval (val);
|
|
|
993 Fset (symbol, val);
|
|
|
994 }
|
|
|
995
|
|
|
996 UNGCPRO;
|
|
|
997 return val;
|
|
|
998 }
|
|
|
999
|
|
|
1000 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
|
1001 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
|
1002 */
|
|
|
1003 (args))
|
|
|
1004 {
|
|
|
1005 return XCAR (args);
|
|
|
1006 }
|
|
|
1007
|
|
|
1008 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
|
1009 Like `quote', but preferred for objects which are functions.
|
|
|
1010 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1011 `quote' cannot do that.
|
|
|
1012 */
|
|
|
1013 (args))
|
|
|
1014 {
|
|
|
1015 return XCAR (args);
|
|
|
1016 }
|
|
|
1017
|
|
|
1018
|
|
|
1019 /************************************************************************/
|
|
|
1020 /* Defining functions/variables */
|
|
|
1021 /************************************************************************/
|
|
|
1022 static Lisp_Object
|
|
|
1023 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1024 {
|
|
|
1025 Ffset (name, defn);
|
|
|
1026 LOADHIST_ATTACH (name);
|
|
|
1027 return name;
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
|
1031 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1032 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1033 See also the function `interactive'.
|
|
|
1034 */
|
|
|
1035 (args))
|
|
|
1036 {
|
|
|
1037 /* This function can GC */
|
|
|
1038 return define_function (XCAR (args),
|
|
|
1039 Fcons (Qlambda, XCDR (args)));
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
|
1043 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1044 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1045 When the macro is called, as in (NAME ARGS...),
|
|
|
1046 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1047 the list ARGS... as it appears in the expression,
|
|
|
1048 and the result should be a form to be evaluated instead of the original.
|
|
|
1049 */
|
|
|
1050 (args))
|
|
|
1051 {
|
|
|
1052 /* This function can GC */
|
|
|
1053 return define_function (XCAR (args),
|
|
|
1054 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
|
1055 }
|
|
|
1056
|
|
|
1057 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
|
1058 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1059 You are not required to define a variable in order to use it,
|
|
|
1060 but the definition can supply documentation and an initial value
|
|
|
1061 in a way that tags can recognize.
|
|
|
1062
|
|
|
1063 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1064 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1065 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1066 void.)
|
|
|
1067 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1068 buffer-local values are not affected.
|
|
|
1069 INITVALUE and DOCSTRING are optional.
|
|
|
1070 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1071 This means that M-x set-variable recognizes it.
|
|
428
|
1072 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1073
|
|
|
1074 In lisp-interaction-mode defvar is treated as defconst.
|
|
|
1075 */
|
|
|
1076 (args))
|
|
|
1077 {
|
|
|
1078 /* This function can GC */
|
|
|
1079 Lisp_Object sym = XCAR (args);
|
|
|
1080
|
|
|
1081 if (!NILP (args = XCDR (args)))
|
|
|
1082 {
|
|
|
1083 Lisp_Object val = XCAR (args);
|
|
|
1084
|
|
|
1085 if (NILP (Fdefault_boundp (sym)))
|
|
|
1086 {
|
|
|
1087 struct gcpro gcpro1;
|
|
|
1088 GCPRO1 (val);
|
|
|
1089 val = Feval (val);
|
|
|
1090 Fset_default (sym, val);
|
|
|
1091 UNGCPRO;
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 if (!NILP (args = XCDR (args)))
|
|
|
1095 {
|
|
|
1096 Lisp_Object doc = XCAR (args);
|
|
|
1097 Fput (sym, Qvariable_documentation, doc);
|
|
|
1098 if (!NILP (args = XCDR (args)))
|
|
|
1099 error ("too many arguments");
|
|
|
1100 }
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 #ifdef I18N3
|
|
|
1104 if (!NILP (Vfile_domain))
|
|
|
1105 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1106 #endif
|
|
|
1107
|
|
|
1108 LOADHIST_ATTACH (sym);
|
|
|
1109 return sym;
|
|
|
1110 }
|
|
|
1111
|
|
|
1112 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
|
1113 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1114 variable.
|
|
|
1115 The intent is that programs do not change this value, but users may.
|
|
|
1116 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1117 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1118 buffer-local values are not affected.
|
|
|
1119 DOCSTRING is optional.
|
|
|
1120 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1121 This means that M-x set-variable recognizes it.
|
|
428
|
1122
|
|
|
1123 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1124 normally loaded, since it is useful for users to be able to specify
|
|
|
1125 their own values for such variables before loading the library.
|
|
|
1126 Since `defconst' unconditionally assigns the variable,
|
|
|
1127 it would override the user's choice.
|
|
|
1128 */
|
|
|
1129 (args))
|
|
|
1130 {
|
|
|
1131 /* This function can GC */
|
|
|
1132 Lisp_Object sym = XCAR (args);
|
|
|
1133 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1134 struct gcpro gcpro1;
|
|
|
1135
|
|
|
1136 GCPRO1 (val);
|
|
|
1137
|
|
|
1138 Fset_default (sym, val);
|
|
|
1139
|
|
|
1140 UNGCPRO;
|
|
|
1141
|
|
|
1142 if (!NILP (args = XCDR (args)))
|
|
|
1143 {
|
|
|
1144 Lisp_Object doc = XCAR (args);
|
|
|
1145 Fput (sym, Qvariable_documentation, doc);
|
|
|
1146 if (!NILP (args = XCDR (args)))
|
|
|
1147 error ("too many arguments");
|
|
|
1148 }
|
|
|
1149
|
|
|
1150 #ifdef I18N3
|
|
|
1151 if (!NILP (Vfile_domain))
|
|
|
1152 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1153 #endif
|
|
|
1154
|
|
|
1155 LOADHIST_ATTACH (sym);
|
|
|
1156 return sym;
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
|
1160 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1161 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1162 Determined by whether the first character of the documentation
|
|
|
1163 for the variable is `*'.
|
|
|
1164 */
|
|
|
1165 (variable))
|
|
|
1166 {
|
|
|
1167 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1168
|
|
|
1169 return
|
|
|
1170 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1171
|
|
|
1172 (STRINGP (documentation) &&
|
|
|
1173 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1174
|
|
|
1175 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1176 (CONSP (documentation)
|
|
|
1177 && STRINGP (XCAR (documentation))
|
|
|
1178 && INTP (XCDR (documentation))
|
|
|
1179 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1180 Qt : Qnil;
|
|
|
1181 }
|
|
|
1182
|
|
|
1183 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
|
1184 Return result of expanding macros at top level of FORM.
|
|
|
1185 If FORM is not a macro call, it is returned unchanged.
|
|
|
1186 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1187 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1188
|
|
442
|
1189 The second optional arg ENVIRONMENT specifies an environment of macro
|
|
428
|
1190 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
|
1191 */
|
|
442
|
1192 (form, environment))
|
|
428
|
1193 {
|
|
|
1194 /* This function can GC */
|
|
|
1195 /* With cleanups from Hallvard Furuseth. */
|
|
|
1196 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1197
|
|
|
1198 while (1)
|
|
|
1199 {
|
|
|
1200 /* Come back here each time we expand a macro call,
|
|
|
1201 in case it expands into another macro call. */
|
|
|
1202 if (!CONSP (form))
|
|
|
1203 break;
|
|
|
1204 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1205 def = sym = XCAR (form);
|
|
|
1206 tem = Qnil;
|
|
|
1207 /* Trace symbols aliases to other symbols
|
|
|
1208 until we get a symbol that is not an alias. */
|
|
|
1209 while (SYMBOLP (def))
|
|
|
1210 {
|
|
|
1211 QUIT;
|
|
|
1212 sym = def;
|
|
442
|
1213 tem = Fassq (sym, environment);
|
|
428
|
1214 if (NILP (tem))
|
|
|
1215 {
|
|
|
1216 def = XSYMBOL (sym)->function;
|
|
|
1217 if (!UNBOUNDP (def))
|
|
|
1218 continue;
|
|
|
1219 }
|
|
|
1220 break;
|
|
|
1221 }
|
|
442
|
1222 /* Right now TEM is the result from SYM in ENVIRONMENT,
|
|
428
|
1223 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1224 if (NILP (tem))
|
|
|
1225 {
|
|
442
|
1226 /* SYM is not mentioned in ENVIRONMENT.
|
|
428
|
1227 Look at its function definition. */
|
|
|
1228 if (UNBOUNDP (def)
|
|
|
1229 || !CONSP (def))
|
|
|
1230 /* Not defined or definition not suitable */
|
|
|
1231 break;
|
|
|
1232 if (EQ (XCAR (def), Qautoload))
|
|
|
1233 {
|
|
|
1234 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1235 tem = Felt (def, make_int (4));
|
|
|
1236 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1237 {
|
|
|
1238 /* Yes, load it and try again. */
|
|
|
1239 do_autoload (def, sym);
|
|
|
1240 continue;
|
|
|
1241 }
|
|
|
1242 else
|
|
|
1243 break;
|
|
|
1244 }
|
|
|
1245 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1246 break;
|
|
|
1247 else expander = XCDR (def);
|
|
|
1248 }
|
|
|
1249 else
|
|
|
1250 {
|
|
|
1251 expander = XCDR (tem);
|
|
|
1252 if (NILP (expander))
|
|
|
1253 break;
|
|
|
1254 }
|
|
|
1255 form = apply1 (expander, XCDR (form));
|
|
|
1256 }
|
|
|
1257 return form;
|
|
|
1258 }
|
|
|
1259
|
|
|
1260
|
|
|
1261 /************************************************************************/
|
|
|
1262 /* Non-local exits */
|
|
|
1263 /************************************************************************/
|
|
|
1264
|
|
|
1265 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1266 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1267 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1268 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1269 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1270 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1271 */
|
|
|
1272 (args))
|
|
|
1273 {
|
|
|
1274 /* This function can GC */
|
|
|
1275 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1276 Lisp_Object body = XCDR (args);
|
|
|
1277 return internal_catch (tag, Fprogn, body, 0);
|
|
|
1278 }
|
|
|
1279
|
|
|
1280 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1281 FUNC should return a Lisp_Object.
|
|
|
1282 This is how catches are done from within C code. */
|
|
|
1283
|
|
|
1284 Lisp_Object
|
|
|
1285 internal_catch (Lisp_Object tag,
|
|
|
1286 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1287 Lisp_Object arg,
|
|
|
1288 int * volatile threw)
|
|
|
1289 {
|
|
|
1290 /* This structure is made part of the chain `catchlist'. */
|
|
|
1291 struct catchtag c;
|
|
|
1292
|
|
|
1293 /* Fill in the components of c, and put it on the list. */
|
|
|
1294 c.next = catchlist;
|
|
|
1295 c.tag = tag;
|
|
|
1296 c.val = Qnil;
|
|
|
1297 c.backlist = backtrace_list;
|
|
|
1298 #if 0 /* FSFmacs */
|
|
|
1299 /* #### */
|
|
|
1300 c.handlerlist = handlerlist;
|
|
|
1301 #endif
|
|
|
1302 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1303 c.pdlcount = specpdl_depth();
|
|
|
1304 #if 0 /* FSFmacs */
|
|
|
1305 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1306 #endif
|
|
|
1307 c.gcpro = gcprolist;
|
|
|
1308 catchlist = &c;
|
|
|
1309
|
|
|
1310 /* Call FUNC. */
|
|
|
1311 if (SETJMP (c.jmp))
|
|
|
1312 {
|
|
|
1313 /* Throw works by a longjmp that comes right here. */
|
|
|
1314 if (threw) *threw = 1;
|
|
|
1315 return c.val;
|
|
|
1316 }
|
|
|
1317 c.val = (*func) (arg);
|
|
|
1318 if (threw) *threw = 0;
|
|
|
1319 catchlist = c.next;
|
|
442
|
1320 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1321 check_error_state_sanity ();
|
|
|
1322 #endif
|
|
428
|
1323 return c.val;
|
|
|
1324 }
|
|
|
1325
|
|
|
1326
|
|
|
1327 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1328 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1329
|
|
|
1330 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1331 they choose the catch tag to throw to. A catch tag for a
|
|
|
1332 condition-case form has a TAG of Qnil.
|
|
|
1333
|
|
|
1334 Before each catch is discarded, unbind all special bindings and
|
|
|
1335 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1336 the handler stack as we go, so that the proper handlers are in
|
|
|
1337 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1338 some static info saved in CATCH, and longjmp to the location
|
|
|
1339 specified in the
|
|
|
1340
|
|
|
1341 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1342
|
|
|
1343 static void
|
|
|
1344 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1345 {
|
|
|
1346 #if 0 /* FSFmacs */
|
|
|
1347 /* #### */
|
|
|
1348 REGISTER int last_time;
|
|
|
1349 #endif
|
|
|
1350
|
|
|
1351 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1352 Before each catch is discarded, unbind all special bindings
|
|
|
1353 and execute all unwind-protect clauses made above that catch.
|
|
|
1354 At the end, restore some static info saved in CATCH,
|
|
|
1355 and longjmp to the location specified.
|
|
|
1356 */
|
|
|
1357
|
|
|
1358 /* Save the value somewhere it will be GC'ed.
|
|
|
1359 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1360 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1361 c->val = val;
|
|
|
1362
|
|
|
1363 #if 0 /* FSFmacs */
|
|
|
1364 /* Restore the polling-suppression count. */
|
|
|
1365 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1366 #endif
|
|
|
1367
|
|
|
1368 #if 0 /* FSFmacs */
|
|
|
1369 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1370 do
|
|
|
1371 {
|
|
|
1372 last_time = catchlist == c;
|
|
|
1373
|
|
|
1374 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1375 handlers. */
|
|
|
1376 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1377 handlerlist = catchlist->handlerlist;
|
|
|
1378 catchlist = catchlist->next;
|
|
442
|
1379 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1380 check_error_state_sanity ();
|
|
|
1381 #endif
|
|
428
|
1382 }
|
|
|
1383 while (! last_time);
|
|
|
1384 #else /* Actual XEmacs code */
|
|
|
1385 /* Unwind the specpdl stack */
|
|
|
1386 unbind_to (c->pdlcount, Qnil);
|
|
|
1387 catchlist = c->next;
|
|
442
|
1388 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1389 check_error_state_sanity ();
|
|
|
1390 #endif
|
|
428
|
1391 #endif
|
|
|
1392
|
|
|
1393 gcprolist = c->gcpro;
|
|
|
1394 backtrace_list = c->backlist;
|
|
|
1395 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1396
|
|
442
|
1397 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1398 throw_level = 0;
|
|
|
1399 #endif
|
|
|
1400 LONGJMP (c->jmp, 1);
|
|
|
1401 }
|
|
|
1402
|
|
|
1403 static DOESNT_RETURN
|
|
|
1404 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1405 Lisp_Object sig, Lisp_Object data)
|
|
|
1406 {
|
|
442
|
1407 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1408 /* die if we recurse more than is reasonable */
|
|
|
1409 if (++throw_level > 20)
|
|
|
1410 abort();
|
|
|
1411 #endif
|
|
|
1412
|
|
|
1413 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1414 "last resort" when there is no handler for this error and
|
|
|
1415 the debugger couldn't be invoked, so we are throwing to
|
|
|
1416 'top-level. If this tag doesn't exist (happens during the
|
|
|
1417 initialization stages) we would get in an infinite recursive
|
|
|
1418 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1419 really-early-error-handler.
|
|
|
1420
|
|
|
1421 Note that in fact the only time that the "last resort"
|
|
|
1422 occurs is when there's no catch for 'top-level -- the
|
|
|
1423 'top-level catch and the catch-all error handler are
|
|
|
1424 established at the same time, in initial_command_loop/
|
|
|
1425 top_level_1.
|
|
|
1426
|
|
|
1427 #### Fix this horrifitude!
|
|
|
1428 */
|
|
|
1429
|
|
|
1430 while (1)
|
|
|
1431 {
|
|
|
1432 REGISTER struct catchtag *c;
|
|
|
1433
|
|
|
1434 #if 0 /* FSFmacs */
|
|
|
1435 if (!NILP (tag)) /* #### */
|
|
|
1436 #endif
|
|
|
1437 for (c = catchlist; c; c = c->next)
|
|
|
1438 {
|
|
|
1439 if (EQ (c->tag, tag))
|
|
|
1440 unwind_to_catch (c, val);
|
|
|
1441 }
|
|
|
1442 if (!bomb_out_p)
|
|
|
1443 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1444 else
|
|
|
1445 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1446 }
|
|
|
1447
|
|
|
1448 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1449 /* throw_level--; */
|
|
|
1450 /* getting tired of compilation warnings */
|
|
|
1451 /* return Qnil; */
|
|
|
1452 }
|
|
|
1453
|
|
|
1454 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1455 Fthrow() works.
|
|
|
1456
|
|
|
1457 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1458 back to the appropriate condition-case handler after (maybe)
|
|
|
1459 the debugger is entered. In that case, TAG is the value
|
|
|
1460 of Vcondition_handlers that was in place just after the
|
|
|
1461 condition-case handler was set up. The car of this will be
|
|
|
1462 some data referring to the handler: Its car will be Qunbound
|
|
|
1463 (thus, this tag can never be generated by Lisp code), and
|
|
|
1464 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1465 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1466 This works fine because Fthrow() does not care what TAG was
|
|
|
1467 passed to it: it just looks up the catch list for something
|
|
|
1468 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1469 back to the place that established the catch (in this case,
|
|
|
1470 condition_case_1). See below for more info.
|
|
|
1471 */
|
|
|
1472
|
|
|
1473 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
|
1474 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
|
1475 Both TAG and VALUE are evalled.
|
|
|
1476 */
|
|
|
1477 (tag, val))
|
|
|
1478 {
|
|
|
1479 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1480 return Qnil;
|
|
|
1481 }
|
|
|
1482
|
|
|
1483 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1484 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1485 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1486 If BODYFORM completes normally, its value is returned
|
|
|
1487 after executing the UNWINDFORMS.
|
|
|
1488 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1489 */
|
|
|
1490 (args))
|
|
|
1491 {
|
|
|
1492 /* This function can GC */
|
|
|
1493 int speccount = specpdl_depth();
|
|
|
1494
|
|
|
1495 record_unwind_protect (Fprogn, XCDR (args));
|
|
|
1496 return unbind_to (speccount, Feval (XCAR (args)));
|
|
|
1497 }
|
|
|
1498
|
|
|
1499
|
|
|
1500 /************************************************************************/
|
|
|
1501 /* Signalling and trapping errors */
|
|
|
1502 /************************************************************************/
|
|
|
1503
|
|
|
1504 static Lisp_Object
|
|
|
1505 condition_bind_unwind (Lisp_Object loser)
|
|
|
1506 {
|
|
440
|
1507 Lisp_Cons *victim;
|
|
428
|
1508 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1509 Lisp_Object tem = XCAR (loser);
|
|
|
1510
|
|
|
1511 while (CONSP (tem))
|
|
|
1512 {
|
|
|
1513 victim = XCONS (tem);
|
|
|
1514 tem = victim->cdr;
|
|
|
1515 free_cons (victim);
|
|
|
1516 }
|
|
|
1517 victim = XCONS (loser);
|
|
|
1518
|
|
|
1519 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1520 Vcondition_handlers = victim->cdr;
|
|
|
1521
|
|
|
1522 free_cons (victim);
|
|
|
1523 return Qnil;
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 static Lisp_Object
|
|
|
1527 condition_case_unwind (Lisp_Object loser)
|
|
|
1528 {
|
|
440
|
1529 Lisp_Cons *victim;
|
|
428
|
1530
|
|
|
1531 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1532 victim = XCONS (XCAR (loser));
|
|
|
1533 free_cons (victim);
|
|
|
1534
|
|
|
1535 victim = XCONS (loser);
|
|
|
1536 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1537 Vcondition_handlers = victim->cdr;
|
|
|
1538
|
|
|
1539 free_cons (victim);
|
|
|
1540 return Qnil;
|
|
|
1541 }
|
|
|
1542
|
|
|
1543 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1544 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1545
|
|
|
1546 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1547 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1548 HANDLERS as something to be caught, the return value of this
|
|
|
1549 function is the return value from BFUN. If such an error does
|
|
|
1550 occur, HFUN is called, and its return value becomes the
|
|
|
1551 return value of condition_case_1(). The second argument passed
|
|
|
1552 to HFUN will always be HARG. The first argument depends on
|
|
|
1553 HANDLERS:
|
|
|
1554
|
|
|
1555 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1556 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1557 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1558 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1559 `debug-on-error' was set.
|
|
|
1560
|
|
|
1561 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1562 debugger is invoked if `debug-on-error' was set.
|
|
|
1563
|
|
|
1564 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1565 exactly as in `condition-case', and errors will be trapped
|
|
|
1566 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1567 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1568 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1569
|
|
|
1570 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1571 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1572 for why), establishes a catch whose tag is this new value of
|
|
|
1573 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1574 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1575 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1576 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1577 jump point we just established, and we in turn just call the
|
|
|
1578 HFUN and return its value.
|
|
|
1579
|
|
|
1580 For a real condition-case, HFUN will always be
|
|
|
1581 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1582 to condition-case. That function just binds VAR to the cons
|
|
|
1583 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1584 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1585 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1586 it had *before* condition_case_1() was called. This maintains
|
|
|
1587 consistency (so that the state of things at exit of
|
|
|
1588 condition_case_1() is the same as at entry), and implies
|
|
|
1589 that the handler can signal the same error again (possibly
|
|
|
1590 after processing of its own), without getting in an infinite
|
|
|
1591 loop. */
|
|
|
1592
|
|
|
1593 Lisp_Object
|
|
|
1594 condition_case_1 (Lisp_Object handlers,
|
|
|
1595 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1596 Lisp_Object barg,
|
|
|
1597 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1598 Lisp_Object harg)
|
|
|
1599 {
|
|
|
1600 int speccount = specpdl_depth();
|
|
|
1601 struct catchtag c;
|
|
|
1602 struct gcpro gcpro1;
|
|
|
1603
|
|
|
1604 #if 0 /* FSFmacs */
|
|
|
1605 c.tag = Qnil;
|
|
|
1606 #else
|
|
|
1607 /* Do consing now so out-of-memory error happens up front */
|
|
|
1608 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1609 which is known specially by Fsignal.
|
|
|
1610 This is an abomination, but to fix it would require either
|
|
|
1611 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1612 or changing the byte-compiler output (no thanks). */
|
|
|
1613 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1614 Vcondition_handlers);
|
|
|
1615 #endif
|
|
|
1616 c.val = Qnil;
|
|
|
1617 c.backlist = backtrace_list;
|
|
|
1618 #if 0 /* FSFmacs */
|
|
|
1619 /* #### */
|
|
|
1620 c.handlerlist = handlerlist;
|
|
|
1621 #endif
|
|
|
1622 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1623 c.pdlcount = specpdl_depth();
|
|
|
1624 #if 0 /* FSFmacs */
|
|
|
1625 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1626 #endif
|
|
|
1627 c.gcpro = gcprolist;
|
|
|
1628 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1629 c.next = catchlist;
|
|
|
1630
|
|
|
1631 if (SETJMP (c.jmp))
|
|
|
1632 {
|
|
|
1633 /* throw does ungcpro, etc */
|
|
|
1634 return (*hfun) (c.val, harg);
|
|
|
1635 }
|
|
|
1636
|
|
|
1637 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1638
|
|
|
1639 catchlist = &c;
|
|
|
1640 #if 0 /* FSFmacs */
|
|
|
1641 h.handler = handlers;
|
|
|
1642 h.var = Qnil;
|
|
|
1643 h.next = handlerlist;
|
|
|
1644 h.tag = &c;
|
|
|
1645 handlerlist = &h;
|
|
|
1646 #else
|
|
|
1647 Vcondition_handlers = c.tag;
|
|
|
1648 #endif
|
|
|
1649 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1650
|
|
|
1651 c.val = ((*bfun) (barg));
|
|
|
1652
|
|
|
1653 /* The following is *not* true: (ben)
|
|
|
1654
|
|
|
1655 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1656 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1657 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1658 UNGCPRO;
|
|
|
1659 catchlist = c.next;
|
|
442
|
1660 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1661 check_error_state_sanity ();
|
|
|
1662 #endif
|
|
428
|
1663 Vcondition_handlers = XCDR (c.tag);
|
|
|
1664
|
|
|
1665 return unbind_to (speccount, c.val);
|
|
|
1666 }
|
|
|
1667
|
|
|
1668 static Lisp_Object
|
|
|
1669 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1670 {
|
|
|
1671 /* This function can GC */
|
|
|
1672 #if 0 /* FSFmacs */
|
|
|
1673 if (!NILP (h.var))
|
|
|
1674 specbind (h.var, c.val);
|
|
|
1675 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1676
|
|
|
1677 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1678 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1679 throwing. */
|
|
|
1680 unbind_to (c.pdlcount, Qnil);
|
|
|
1681 return val;
|
|
|
1682 #else
|
|
|
1683 int speccount;
|
|
|
1684
|
|
|
1685 CHECK_TRUE_LIST (val);
|
|
|
1686 if (NILP (var))
|
|
|
1687 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1688
|
|
|
1689 speccount = specpdl_depth();
|
|
|
1690 specbind (var, Fcar (val));
|
|
|
1691 val = Fprogn (Fcdr (val));
|
|
|
1692 return unbind_to (speccount, val);
|
|
|
1693 #endif
|
|
|
1694 }
|
|
|
1695
|
|
|
1696 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1697 condition-case except that it takes three arguments rather
|
|
|
1698 than a single list of arguments. */
|
|
|
1699 Lisp_Object
|
|
|
1700 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1701 {
|
|
|
1702 /* This function can GC */
|
|
|
1703 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1704 {
|
|
|
1705 if (NILP (handler))
|
|
|
1706 ;
|
|
|
1707 else if (CONSP (handler))
|
|
|
1708 {
|
|
|
1709 Lisp_Object conditions = XCAR (handler);
|
|
|
1710 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1711 if (SYMBOLP (conditions))
|
|
|
1712 ;
|
|
|
1713 else
|
|
|
1714 {
|
|
|
1715 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1716 if (!SYMBOLP (condition))
|
|
|
1717 goto invalid_condition_handler;
|
|
|
1718 }
|
|
|
1719 }
|
|
|
1720 else
|
|
|
1721 {
|
|
|
1722 invalid_condition_handler:
|
|
|
1723 signal_simple_error ("Invalid condition handler", handler);
|
|
|
1724 }
|
|
|
1725 }
|
|
|
1726
|
|
|
1727 CHECK_SYMBOL (var);
|
|
|
1728
|
|
|
1729 return condition_case_1 (handlers,
|
|
|
1730 Feval, bodyform,
|
|
|
1731 run_condition_case_handlers,
|
|
|
1732 var);
|
|
|
1733 }
|
|
|
1734
|
|
|
1735 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
1736 Regain control when an error is signalled.
|
|
|
1737 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1738 Executes BODYFORM and returns its value if no error happens.
|
|
|
1739 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1740 where the BODY is made of Lisp expressions.
|
|
|
1741
|
|
|
1742 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1743 error's condition names. If an error happens, the first applicable
|
|
|
1744 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1745 all errors, even those without the `error' condition name on them
|
|
|
1746 \(e.g. `quit').
|
|
|
1747
|
|
|
1748 The car of a handler may be a list of condition names
|
|
|
1749 instead of a single condition name.
|
|
|
1750
|
|
|
1751 When a handler handles an error,
|
|
|
1752 control returns to the condition-case and the handler BODY... is executed
|
|
|
1753 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1754 VAR may be nil; then you do not get access to the signal information.
|
|
|
1755
|
|
|
1756 The value of the last BODY form is returned from the condition-case.
|
|
|
1757 See also the function `signal' for more info.
|
|
|
1758
|
|
|
1759 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1760 and the current catches, condition-cases, and bindings have all been
|
|
|
1761 popped back to the state they were in just before the call to
|
|
|
1762 `condition-case'. This means that resignalling the error from
|
|
|
1763 within the handler will not result in an infinite loop.
|
|
|
1764
|
|
|
1765 If you want to establish an error handler that is called with the
|
|
|
1766 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1767 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
1768 */
|
|
|
1769 (args))
|
|
|
1770 {
|
|
|
1771 /* This function can GC */
|
|
|
1772 Lisp_Object var = XCAR (args);
|
|
|
1773 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1774 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1775 return condition_case_3 (bodyform, var, handlers);
|
|
|
1776 }
|
|
|
1777
|
|
|
1778 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
1779 Regain control when an error is signalled, without popping the stack.
|
|
|
1780 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1781 This function is similar to `condition-case', but the handler is invoked
|
|
|
1782 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1783 that was current when `signal' was called, rather than when the handler
|
|
|
1784 was established.
|
|
|
1785
|
|
|
1786 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
1787 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
1788 `signal' is called (this differs from `condition-case', which allows
|
|
|
1789 you to specify which errors are trapped). If the handler function
|
|
|
1790 returns, `signal' continues as if the handler were never invoked.
|
|
|
1791 \(It continues to look for handlers established earlier than this one,
|
|
|
1792 and invokes the standard error-handler if none is found.)
|
|
|
1793 */
|
|
|
1794 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
1795 {
|
|
|
1796 /* This function can GC */
|
|
|
1797 int speccount = specpdl_depth();
|
|
|
1798 Lisp_Object tem;
|
|
|
1799
|
|
|
1800 /* #### If there were a way to check that args[0] were a function
|
|
|
1801 which accepted one arg, that should be done here ... */
|
|
|
1802
|
|
|
1803 /* (handler-fun . handler-args) */
|
|
|
1804 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1805 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1806 Vcondition_handlers = tem;
|
|
|
1807
|
|
|
1808 /* Caller should have GC-protected args */
|
|
|
1809 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
|
1810 }
|
|
|
1811
|
|
|
1812 static int
|
|
|
1813 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1814 {
|
|
|
1815 if (EQ (type, Qt))
|
|
|
1816 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1817 * Use with caution! */
|
|
|
1818 return 1;
|
|
|
1819
|
|
|
1820 if (SYMBOLP (type))
|
|
|
1821 return !NILP (Fmemq (type, conditions));
|
|
|
1822
|
|
|
1823 for (; CONSP (type); type = XCDR (type))
|
|
|
1824 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1825 return 1;
|
|
|
1826
|
|
|
1827 return 0;
|
|
|
1828 }
|
|
|
1829
|
|
|
1830 static Lisp_Object
|
|
|
1831 return_from_signal (Lisp_Object value)
|
|
|
1832 {
|
|
|
1833 #if 1
|
|
|
1834 /* Most callers are not prepared to handle gc if this
|
|
|
1835 returns. So, since this feature is not very useful,
|
|
|
1836 take it out. */
|
|
|
1837 /* Have called debugger; return value to signaller */
|
|
|
1838 return value;
|
|
|
1839 #else /* But the reality is that that stinks, because: */
|
|
|
1840 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1841 to be continuable!! */
|
|
|
1842 error ("Returning a value from an error is no longer supported");
|
|
|
1843 #endif
|
|
|
1844 }
|
|
|
1845
|
|
|
1846 extern int in_display;
|
|
|
1847
|
|
|
1848
|
|
|
1849 /************************************************************************/
|
|
|
1850 /* the workhorse error-signaling function */
|
|
|
1851 /************************************************************************/
|
|
|
1852
|
|
|
1853 /* #### This function has not been synched with FSF. It diverges
|
|
|
1854 significantly. */
|
|
|
1855
|
|
|
1856 static Lisp_Object
|
|
|
1857 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1858 {
|
|
|
1859 /* This function can GC */
|
|
|
1860 struct gcpro gcpro1, gcpro2;
|
|
|
1861 Lisp_Object conditions;
|
|
|
1862 Lisp_Object handlers;
|
|
|
1863 /* signal_call_debugger() could get called more than once
|
|
|
1864 (once when a call-with-condition-handler is about to
|
|
|
1865 be dealt with, and another when a condition-case handler
|
|
|
1866 is about to be invoked). So make sure the debugger and/or
|
|
|
1867 stack trace aren't done more than once. */
|
|
|
1868 int stack_trace_displayed = 0;
|
|
|
1869 int debugger_entered = 0;
|
|
|
1870 GCPRO2 (conditions, handlers);
|
|
|
1871
|
|
|
1872 if (!initialized)
|
|
|
1873 {
|
|
|
1874 /* who knows how much has been initialized? Safest bet is
|
|
|
1875 just to bomb out immediately. */
|
|
442
|
1876 /* let's not use stderr_out() here, because that does a bunch of
|
|
|
1877 things that might not be safe yet. */
|
|
428
|
1878 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1879 abort ();
|
|
|
1880 }
|
|
|
1881
|
|
|
1882 if (gc_in_progress || in_display)
|
|
|
1883 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1884 There is no sensible way to handle errors there. */
|
|
|
1885 abort ();
|
|
|
1886
|
|
|
1887 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1888
|
|
|
1889 for (handlers = Vcondition_handlers;
|
|
|
1890 CONSP (handlers);
|
|
|
1891 handlers = XCDR (handlers))
|
|
|
1892 {
|
|
|
1893 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1894 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1895 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1896
|
|
|
1897 if (!UNBOUNDP (handler_fun))
|
|
|
1898 {
|
|
|
1899 /* call-with-condition-handler */
|
|
|
1900 Lisp_Object tem;
|
|
|
1901 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1902 struct gcpro ngcpro1;
|
|
|
1903 NGCPRO1 (all_handlers);
|
|
|
1904 Vcondition_handlers = outer_handlers;
|
|
|
1905
|
|
|
1906 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1907 outer_handlers, 1,
|
|
|
1908 &stack_trace_displayed,
|
|
|
1909 &debugger_entered);
|
|
|
1910 if (!UNBOUNDP (tem))
|
|
|
1911 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1912
|
|
|
1913 tem = Fcons (sig, data);
|
|
|
1914 if (NILP (handler_data))
|
|
|
1915 tem = call1 (handler_fun, tem);
|
|
|
1916 else
|
|
|
1917 {
|
|
|
1918 /* (This code won't be used (for now?).) */
|
|
|
1919 struct gcpro nngcpro1;
|
|
|
1920 Lisp_Object args[3];
|
|
|
1921 NNGCPRO1 (args[0]);
|
|
|
1922 nngcpro1.nvars = 3;
|
|
|
1923 args[0] = handler_fun;
|
|
|
1924 args[1] = tem;
|
|
|
1925 args[2] = handler_data;
|
|
|
1926 nngcpro1.var = args;
|
|
|
1927 tem = Fapply (3, args);
|
|
|
1928 NNUNGCPRO;
|
|
|
1929 }
|
|
|
1930 NUNGCPRO;
|
|
|
1931 #if 0
|
|
|
1932 if (!EQ (tem, Qsignal))
|
|
|
1933 return return_from_signal (tem);
|
|
|
1934 #endif
|
|
|
1935 /* If handler didn't throw, try another handler */
|
|
|
1936 Vcondition_handlers = all_handlers;
|
|
|
1937 }
|
|
|
1938
|
|
|
1939 /* It's a condition-case handler */
|
|
|
1940
|
|
|
1941 /* t is used by handlers for all conditions, set up by C code.
|
|
|
1942 * debugger is not called even if debug_on_error */
|
|
|
1943 else if (EQ (handler_data, Qt))
|
|
|
1944 {
|
|
|
1945 UNGCPRO;
|
|
|
1946 return Fthrow (handlers, Fcons (sig, data));
|
|
|
1947 }
|
|
|
1948 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1949 addition it invokes the debugger if debug_on_error.
|
|
|
1950 This is normally used for the outer command-loop error
|
|
|
1951 handler. */
|
|
|
1952 else if (EQ (handler_data, Qerror))
|
|
|
1953 {
|
|
|
1954 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1955 outer_handlers, 0,
|
|
|
1956 &stack_trace_displayed,
|
|
|
1957 &debugger_entered);
|
|
|
1958
|
|
|
1959 UNGCPRO;
|
|
|
1960 if (!UNBOUNDP (tem))
|
|
|
1961 return return_from_signal (tem);
|
|
|
1962
|
|
|
1963 tem = Fcons (sig, data);
|
|
|
1964 return Fthrow (handlers, tem);
|
|
|
1965 }
|
|
|
1966 else
|
|
|
1967 {
|
|
|
1968 /* handler established by real (Lisp) condition-case */
|
|
|
1969 Lisp_Object h;
|
|
|
1970
|
|
|
1971 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1972 {
|
|
|
1973 Lisp_Object clause = Fcar (h);
|
|
|
1974 Lisp_Object tem = Fcar (clause);
|
|
|
1975
|
|
|
1976 if (condition_type_p (tem, conditions))
|
|
|
1977 {
|
|
|
1978 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1979 outer_handlers, 1,
|
|
|
1980 &stack_trace_displayed,
|
|
|
1981 &debugger_entered);
|
|
|
1982 UNGCPRO;
|
|
|
1983 if (!UNBOUNDP (tem))
|
|
|
1984 return return_from_signal (tem);
|
|
|
1985
|
|
|
1986 /* Doesn't return */
|
|
|
1987 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
|
1988 return Fthrow (handlers, tem);
|
|
|
1989 }
|
|
|
1990 }
|
|
|
1991 }
|
|
|
1992 }
|
|
|
1993
|
|
|
1994 /* If no handler is present now, try to run the debugger,
|
|
|
1995 and if that fails, throw to top level.
|
|
|
1996
|
|
|
1997 #### The only time that no handler is present is during
|
|
|
1998 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1999 there is no 'top-level catch. (That's why the
|
|
|
2000 "bomb-out" hack was added.)
|
|
|
2001
|
|
|
2002 #### Fix this horrifitude!
|
|
|
2003 */
|
|
|
2004 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
2005 &stack_trace_displayed,
|
|
|
2006 &debugger_entered);
|
|
|
2007 UNGCPRO;
|
|
|
2008 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2009 return Qnil;
|
|
|
2010 }
|
|
|
2011
|
|
|
2012
|
|
|
2013 /****************** Error functions class 1 ******************/
|
|
|
2014
|
|
|
2015 /* Class 1: General functions that signal an error.
|
|
|
2016 These functions take an error type and a list of associated error
|
|
|
2017 data. */
|
|
|
2018
|
|
|
2019 /* The simplest external error function: it would be called
|
|
|
2020 signal_continuable_error() in the terminology below, but it's
|
|
|
2021 Lisp-callable. */
|
|
|
2022
|
|
|
2023 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2024 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2025 An error symbol is a symbol defined using `define-error'.
|
|
|
2026 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2027 If the signal is handled, DATA is made available to the handler.
|
|
|
2028 See also the function `signal-error', and the functions to handle errors:
|
|
|
2029 `condition-case' and `call-with-condition-handler'.
|
|
|
2030
|
|
|
2031 Note that this function can return, if the debugger is invoked and the
|
|
|
2032 user invokes the "return from signal" option.
|
|
|
2033 */
|
|
|
2034 (error_symbol, data))
|
|
|
2035 {
|
|
|
2036 /* Fsignal() is one of these functions that's called all the time
|
|
|
2037 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2038 protect the objects because all sorts of weird stuff could
|
|
|
2039 happen. */
|
|
|
2040
|
|
|
2041 struct gcpro gcpro1;
|
|
|
2042
|
|
|
2043 GCPRO1 (data);
|
|
|
2044 if (!NILP (Vcurrent_error_state))
|
|
|
2045 {
|
|
|
2046 if (!NILP (Vcurrent_warning_class))
|
|
|
2047 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2048 Fcons (error_symbol, data));
|
|
|
2049 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2050 abort (); /* Better not get here! */
|
|
|
2051 }
|
|
|
2052 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2053 }
|
|
|
2054
|
|
|
2055 /* Signal a non-continuable error. */
|
|
|
2056
|
|
|
2057 DOESNT_RETURN
|
|
|
2058 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2059 {
|
|
|
2060 for (;;)
|
|
|
2061 Fsignal (sig, data);
|
|
|
2062 }
|
|
442
|
2063 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
2064 void
|
|
|
2065 check_error_state_sanity (void)
|
|
|
2066 {
|
|
|
2067 struct catchtag *c;
|
|
|
2068 int found_error_tag = 0;
|
|
|
2069
|
|
|
2070 for (c = catchlist; c; c = c->next)
|
|
|
2071 {
|
|
|
2072 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2073 {
|
|
|
2074 found_error_tag = 1;
|
|
|
2075 break;
|
|
|
2076 }
|
|
|
2077 }
|
|
|
2078
|
|
|
2079 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
|
2080 }
|
|
|
2081 #endif
|
|
428
|
2082
|
|
|
2083 static Lisp_Object
|
|
|
2084 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2085 {
|
|
|
2086 Vcurrent_warning_class = warning_class;
|
|
|
2087 return Qnil;
|
|
|
2088 }
|
|
|
2089
|
|
|
2090 static Lisp_Object
|
|
|
2091 restore_current_error_state (Lisp_Object error_state)
|
|
|
2092 {
|
|
|
2093 Vcurrent_error_state = error_state;
|
|
|
2094 return Qnil;
|
|
|
2095 }
|
|
|
2096
|
|
442
|
2097 static Lisp_Object
|
|
|
2098 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2099 {
|
|
|
2100 Lisp_Object val;
|
|
|
2101 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
|
2102 Lisp_Object no_error = kludgy_args[2];
|
|
|
2103 int speccount = specpdl_depth ();
|
|
|
2104
|
|
|
2105 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2106 {
|
|
|
2107 record_unwind_protect (restore_current_error_state,
|
|
|
2108 Vcurrent_error_state);
|
|
|
2109 Vcurrent_error_state = no_error;
|
|
|
2110 }
|
|
|
2111 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2112 kludgy_args + 3, XINT (kludgy_args[1]));
|
|
|
2113 return unbind_to (speccount, val);
|
|
|
2114 }
|
|
|
2115
|
|
428
|
2116 /* Many functions would like to do one of three things if an error
|
|
|
2117 occurs:
|
|
|
2118
|
|
|
2119 (1) signal the error, as usual.
|
|
|
2120 (2) silently fail and return some error value.
|
|
|
2121 (3) do as (2) but issue a warning in the process.
|
|
|
2122
|
|
|
2123 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2124 value and calls maybe_signal_error() and other such functions.
|
|
|
2125 This approach is inherently error-prone and broken. A much
|
|
|
2126 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2127 Wrap this around any function in which you might want errors
|
|
|
2128 to not be errors.
|
|
|
2129 */
|
|
|
2130
|
|
|
2131 Lisp_Object
|
|
|
2132 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
|
2133 Lisp_Object class, Error_behavior errb,
|
|
|
2134 int nargs, ...)
|
|
|
2135 {
|
|
|
2136 va_list vargs;
|
|
|
2137 int speccount;
|
|
442
|
2138 Lisp_Object kludgy_args[23];
|
|
|
2139 Lisp_Object *args = kludgy_args + 3;
|
|
428
|
2140 int i;
|
|
|
2141 Lisp_Object no_error;
|
|
|
2142
|
|
|
2143 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2144 assert (!NILP (class));
|
|
|
2145 assert (nargs >= 0 && nargs < 20);
|
|
|
2146
|
|
|
2147 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2148 already trapped, we leave them trapped.)
|
|
|
2149
|
|
|
2150 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2151
|
|
|
2152 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2153 were previously enabled. However, we never change the
|
|
|
2154 warning class from one to another. */
|
|
|
2155 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2156 {
|
|
|
2157 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2158 class = Qnil;
|
|
|
2159 errb = ERROR_ME_NOT;
|
|
|
2160 no_error = Qt;
|
|
|
2161 }
|
|
|
2162 else
|
|
|
2163 no_error = Qnil;
|
|
|
2164
|
|
|
2165 va_start (vargs, nargs);
|
|
|
2166 for (i = 0; i < nargs; i++)
|
|
|
2167 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2168 va_end (vargs);
|
|
|
2169
|
|
|
2170 /* If error-checking is not disabled, just call the function.
|
|
|
2171 It's important not to override disabled error-checking with
|
|
|
2172 enabled error-checking. */
|
|
|
2173
|
|
|
2174 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
2175 {
|
|
|
2176 Lisp_Object val;
|
|
|
2177 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2178 return val;
|
|
|
2179 }
|
|
|
2180
|
|
442
|
2181 speccount = specpdl_depth ();
|
|
428
|
2182 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2183 {
|
|
|
2184 /* If we're currently calling for no warnings, then make it so.
|
|
|
2185 If we're currently calling for warnings and we weren't
|
|
|
2186 previously, then set our warning class; otherwise, leave
|
|
|
2187 the existing one alone. */
|
|
|
2188 record_unwind_protect (restore_current_warning_class,
|
|
|
2189 Vcurrent_warning_class);
|
|
|
2190 Vcurrent_warning_class = class;
|
|
|
2191 }
|
|
|
2192
|
|
|
2193 {
|
|
|
2194 int threw;
|
|
|
2195 Lisp_Object the_retval;
|
|
|
2196 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2197 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2198 struct gcpro gcpro1, gcpro2;
|
|
|
2199
|
|
|
2200 GCPRO2 (opaque1, opaque2);
|
|
|
2201 kludgy_args[0] = opaque2;
|
|
|
2202 kludgy_args[1] = make_int (nargs);
|
|
442
|
2203 kludgy_args[2] = no_error;
|
|
428
|
2204 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2205 call_with_suspended_errors_1,
|
|
|
2206 opaque1, &threw);
|
|
|
2207 free_opaque_ptr (opaque1);
|
|
|
2208 free_opaque_ptr (opaque2);
|
|
|
2209 UNGCPRO;
|
|
|
2210 /* Use the returned value except in non-local exit, when
|
|
|
2211 RETVAL applies. */
|
|
|
2212 /* Some perverse compilers require the perverse cast below. */
|
|
|
2213 return unbind_to (speccount,
|
|
|
2214 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
|
2215 }
|
|
|
2216 }
|
|
|
2217
|
|
|
2218 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2219 according to ERRB. CLASS is the class of warning and should
|
|
|
2220 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2221 Qresource, etc.). */
|
|
|
2222
|
|
|
2223 void
|
|
|
2224 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2225 Error_behavior errb)
|
|
|
2226 {
|
|
|
2227 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2228 return;
|
|
|
2229 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2230 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2231 else
|
|
|
2232 for (;;)
|
|
|
2233 Fsignal (sig, data);
|
|
|
2234 }
|
|
|
2235
|
|
|
2236 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2237 according to ERRB. */
|
|
|
2238
|
|
|
2239 Lisp_Object
|
|
|
2240 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2241 Lisp_Object class, Error_behavior errb)
|
|
|
2242 {
|
|
|
2243 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2244 return Qnil;
|
|
|
2245 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2246 {
|
|
|
2247 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2248 return Qnil;
|
|
|
2249 }
|
|
|
2250 else
|
|
|
2251 return Fsignal (sig, data);
|
|
|
2252 }
|
|
|
2253
|
|
|
2254
|
|
|
2255 /****************** Error functions class 2 ******************/
|
|
|
2256
|
|
|
2257 /* Class 2: Printf-like functions that signal an error.
|
|
442
|
2258 These functions signal an error of a specified type, whose data
|
|
428
|
2259 is a single string, created using the arguments. */
|
|
|
2260
|
|
|
2261 /* dump an error message; called like printf */
|
|
|
2262
|
|
|
2263 DOESNT_RETURN
|
|
442
|
2264 type_error (Lisp_Object type, const char *fmt, ...)
|
|
|
2265 {
|
|
|
2266 Lisp_Object obj;
|
|
|
2267 va_list args;
|
|
|
2268
|
|
|
2269 va_start (args, fmt);
|
|
|
2270 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2271 args);
|
|
|
2272 va_end (args);
|
|
|
2273
|
|
|
2274 /* Fsignal GC-protects its args */
|
|
|
2275 signal_error (type, list1 (obj));
|
|
|
2276 }
|
|
|
2277
|
|
|
2278 void
|
|
|
2279 maybe_type_error (Lisp_Object type, Lisp_Object class, Error_behavior errb,
|
|
|
2280 const char *fmt, ...)
|
|
|
2281 {
|
|
|
2282 Lisp_Object obj;
|
|
|
2283 va_list args;
|
|
|
2284
|
|
|
2285 /* Optimization: */
|
|
|
2286 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2287 return;
|
|
|
2288
|
|
|
2289 va_start (args, fmt);
|
|
|
2290 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2291 args);
|
|
|
2292 va_end (args);
|
|
|
2293
|
|
|
2294 /* Fsignal GC-protects its args */
|
|
|
2295 maybe_signal_error (type, list1 (obj), class, errb);
|
|
|
2296 }
|
|
|
2297
|
|
|
2298 Lisp_Object
|
|
|
2299 continuable_type_error (Lisp_Object type, const char *fmt, ...)
|
|
428
|
2300 {
|
|
|
2301 Lisp_Object obj;
|
|
|
2302 va_list args;
|
|
|
2303
|
|
|
2304 va_start (args, fmt);
|
|
442
|
2305 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2306 args);
|
|
|
2307 va_end (args);
|
|
|
2308
|
|
|
2309 /* Fsignal GC-protects its args */
|
|
|
2310 return Fsignal (type, list1 (obj));
|
|
|
2311 }
|
|
|
2312
|
|
|
2313 Lisp_Object
|
|
|
2314 maybe_continuable_type_error (Lisp_Object type, Lisp_Object class,
|
|
|
2315 Error_behavior errb, const char *fmt, ...)
|
|
|
2316 {
|
|
|
2317 Lisp_Object obj;
|
|
|
2318 va_list args;
|
|
|
2319
|
|
|
2320 /* Optimization: */
|
|
|
2321 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2322 return Qnil;
|
|
|
2323
|
|
|
2324 va_start (args, fmt);
|
|
|
2325 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2326 args);
|
|
|
2327 va_end (args);
|
|
|
2328
|
|
|
2329 /* Fsignal GC-protects its args */
|
|
442
|
2330 return maybe_signal_continuable_error (type, list1 (obj), class, errb);
|
|
|
2331 }
|
|
|
2332
|
|
|
2333
|
|
|
2334 /****************** Error functions class 3 ******************/
|
|
|
2335
|
|
|
2336 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2337 These functions signal an error of a specified type, whose data
|
|
|
2338 is two objects, a string and a related Lisp object (usually the object
|
|
|
2339 where the error is occurring). */
|
|
|
2340
|
|
|
2341 DOESNT_RETURN
|
|
|
2342 signal_type_error (Lisp_Object type, const char *reason, Lisp_Object frob)
|
|
|
2343 {
|
|
|
2344 if (UNBOUNDP (frob))
|
|
|
2345 signal_error (type, list1 (build_translated_string (reason)));
|
|
|
2346 else
|
|
|
2347 signal_error (type, list2 (build_translated_string (reason), frob));
|
|
428
|
2348 }
|
|
|
2349
|
|
|
2350 void
|
|
442
|
2351 maybe_signal_type_error (Lisp_Object type, const char *reason,
|
|
|
2352 Lisp_Object frob, Lisp_Object class,
|
|
|
2353 Error_behavior errb)
|
|
|
2354 {
|
|
|
2355 /* Optimization: */
|
|
|
2356 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2357 return;
|
|
|
2358 maybe_signal_error (type, list2 (build_translated_string (reason), frob),
|
|
|
2359 class, errb);
|
|
|
2360 }
|
|
|
2361
|
|
|
2362 Lisp_Object
|
|
|
2363 signal_type_continuable_error (Lisp_Object type, const char *reason,
|
|
|
2364 Lisp_Object frob)
|
|
|
2365 {
|
|
|
2366 return Fsignal (type, list2 (build_translated_string (reason), frob));
|
|
|
2367 }
|
|
|
2368
|
|
|
2369 Lisp_Object
|
|
|
2370 maybe_signal_type_continuable_error (Lisp_Object type, const char *reason,
|
|
|
2371 Lisp_Object frob, Lisp_Object class,
|
|
|
2372 Error_behavior errb)
|
|
|
2373 {
|
|
|
2374 /* Optimization: */
|
|
|
2375 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2376 return Qnil;
|
|
|
2377 return maybe_signal_continuable_error
|
|
|
2378 (type, list2 (build_translated_string (reason),
|
|
|
2379 frob), class, errb);
|
|
|
2380 }
|
|
|
2381
|
|
|
2382
|
|
|
2383 /****************** Error functions class 4 ******************/
|
|
|
2384
|
|
|
2385 /* Class 4: Printf-like functions that signal an error.
|
|
|
2386 These functions signal an error of a specified type, whose data
|
|
|
2387 is a two objects, a string (created using the arguments) and a
|
|
|
2388 Lisp object.
|
|
|
2389 */
|
|
|
2390
|
|
|
2391 DOESNT_RETURN
|
|
|
2392 type_error_with_frob (Lisp_Object type, Lisp_Object frob, const char *fmt, ...)
|
|
|
2393 {
|
|
|
2394 Lisp_Object obj;
|
|
|
2395 va_list args;
|
|
|
2396
|
|
|
2397 va_start (args, fmt);
|
|
|
2398 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2399 args);
|
|
|
2400 va_end (args);
|
|
|
2401
|
|
|
2402 /* Fsignal GC-protects its args */
|
|
|
2403 signal_error (type, list2 (obj, frob));
|
|
|
2404 }
|
|
|
2405
|
|
|
2406 void
|
|
|
2407 maybe_type_error_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2408 Lisp_Object class, Error_behavior errb,
|
|
|
2409 const char *fmt, ...)
|
|
428
|
2410 {
|
|
|
2411 Lisp_Object obj;
|
|
|
2412 va_list args;
|
|
|
2413
|
|
|
2414 /* Optimization: */
|
|
|
2415 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2416 return;
|
|
|
2417
|
|
|
2418 va_start (args, fmt);
|
|
442
|
2419 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2420 args);
|
|
|
2421 va_end (args);
|
|
|
2422
|
|
|
2423 /* Fsignal GC-protects its args */
|
|
|
2424 maybe_signal_error (type, list2 (obj, frob), class, errb);
|
|
|
2425 }
|
|
|
2426
|
|
|
2427 Lisp_Object
|
|
|
2428 continuable_type_error_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2429 const char *fmt, ...)
|
|
|
2430 {
|
|
|
2431 Lisp_Object obj;
|
|
|
2432 va_list args;
|
|
|
2433
|
|
|
2434 va_start (args, fmt);
|
|
|
2435 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2436 args);
|
|
|
2437 va_end (args);
|
|
|
2438
|
|
|
2439 /* Fsignal GC-protects its args */
|
|
|
2440 return Fsignal (type, list2 (obj, frob));
|
|
|
2441 }
|
|
|
2442
|
|
|
2443 Lisp_Object
|
|
|
2444 maybe_continuable_type_error_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2445 Lisp_Object class, Error_behavior errb,
|
|
|
2446 const char *fmt, ...)
|
|
|
2447 {
|
|
|
2448 Lisp_Object obj;
|
|
|
2449 va_list args;
|
|
|
2450
|
|
|
2451 /* Optimization: */
|
|
|
2452 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2453 return Qnil;
|
|
|
2454
|
|
|
2455 va_start (args, fmt);
|
|
|
2456 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2457 args);
|
|
|
2458 va_end (args);
|
|
|
2459
|
|
|
2460 /* Fsignal GC-protects its args */
|
|
|
2461 return maybe_signal_continuable_error (type, list2 (obj, frob),
|
|
|
2462 class, errb);
|
|
|
2463 }
|
|
|
2464
|
|
|
2465
|
|
|
2466 /****************** Error functions class 5 ******************/
|
|
|
2467
|
|
|
2468 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2469 These functions signal an error of a specified type, whose data
|
|
|
2470 is three objects, a string and two related Lisp objects. */
|
|
|
2471
|
|
|
2472 DOESNT_RETURN
|
|
|
2473 signal_type_error_2 (Lisp_Object type, const char *reason,
|
|
|
2474 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2475 {
|
|
|
2476 signal_error (type, list3 (build_translated_string (reason), frob0,
|
|
|
2477 frob1));
|
|
|
2478 }
|
|
|
2479
|
|
|
2480 void
|
|
|
2481 maybe_signal_type_error_2 (Lisp_Object type, const char *reason,
|
|
|
2482 Lisp_Object frob0, Lisp_Object frob1,
|
|
|
2483 Lisp_Object class, Error_behavior errb)
|
|
|
2484 {
|
|
|
2485 /* Optimization: */
|
|
|
2486 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2487 return;
|
|
|
2488 maybe_signal_error (type, list3 (build_translated_string (reason), frob0,
|
|
|
2489 frob1), class, errb);
|
|
|
2490 }
|
|
|
2491
|
|
|
2492
|
|
|
2493 Lisp_Object
|
|
|
2494 signal_type_continuable_error_2 (Lisp_Object type, const char *reason,
|
|
|
2495 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2496 {
|
|
|
2497 return Fsignal (type, list3 (build_translated_string (reason), frob0,
|
|
|
2498 frob1));
|
|
|
2499 }
|
|
|
2500
|
|
|
2501 Lisp_Object
|
|
|
2502 maybe_signal_type_continuable_error_2 (Lisp_Object type, const char *reason,
|
|
|
2503 Lisp_Object frob0, Lisp_Object frob1,
|
|
|
2504 Lisp_Object class, Error_behavior errb)
|
|
|
2505 {
|
|
|
2506 /* Optimization: */
|
|
|
2507 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2508 return Qnil;
|
|
|
2509 return maybe_signal_continuable_error
|
|
|
2510 (type, list3 (build_translated_string (reason), frob0,
|
|
|
2511 frob1),
|
|
|
2512 class, errb);
|
|
|
2513 }
|
|
|
2514
|
|
|
2515
|
|
|
2516 /****************** Simple error functions class 2 ******************/
|
|
|
2517
|
|
|
2518 /* Simple class 2: Printf-like functions that signal an error.
|
|
|
2519 These functions signal an error of type Qerror, whose data
|
|
|
2520 is a single string, created using the arguments. */
|
|
|
2521
|
|
|
2522 /* dump an error message; called like printf */
|
|
|
2523
|
|
|
2524 DOESNT_RETURN
|
|
|
2525 error (const char *fmt, ...)
|
|
|
2526 {
|
|
|
2527 Lisp_Object obj;
|
|
|
2528 va_list args;
|
|
|
2529
|
|
|
2530 va_start (args, fmt);
|
|
|
2531 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2532 args);
|
|
|
2533 va_end (args);
|
|
|
2534
|
|
|
2535 /* Fsignal GC-protects its args */
|
|
|
2536 signal_error (Qerror, list1 (obj));
|
|
|
2537 }
|
|
|
2538
|
|
|
2539 void
|
|
|
2540 maybe_error (Lisp_Object class, Error_behavior errb, const char *fmt, ...)
|
|
|
2541 {
|
|
|
2542 Lisp_Object obj;
|
|
|
2543 va_list args;
|
|
|
2544
|
|
|
2545 /* Optimization: */
|
|
|
2546 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2547 return;
|
|
|
2548
|
|
|
2549 va_start (args, fmt);
|
|
|
2550 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2551 args);
|
|
|
2552 va_end (args);
|
|
|
2553
|
|
|
2554 /* Fsignal GC-protects its args */
|
|
|
2555 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 Lisp_Object
|
|
442
|
2559 continuable_error (const char *fmt, ...)
|
|
428
|
2560 {
|
|
|
2561 Lisp_Object obj;
|
|
|
2562 va_list args;
|
|
|
2563
|
|
|
2564 va_start (args, fmt);
|
|
442
|
2565 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2566 args);
|
|
|
2567 va_end (args);
|
|
|
2568
|
|
|
2569 /* Fsignal GC-protects its args */
|
|
|
2570 return Fsignal (Qerror, list1 (obj));
|
|
|
2571 }
|
|
|
2572
|
|
|
2573 Lisp_Object
|
|
|
2574 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
442
|
2575 const char *fmt, ...)
|
|
428
|
2576 {
|
|
|
2577 Lisp_Object obj;
|
|
|
2578 va_list args;
|
|
|
2579
|
|
|
2580 /* Optimization: */
|
|
|
2581 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2582 return Qnil;
|
|
|
2583
|
|
|
2584 va_start (args, fmt);
|
|
442
|
2585 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2586 args);
|
|
|
2587 va_end (args);
|
|
|
2588
|
|
|
2589 /* Fsignal GC-protects its args */
|
|
|
2590 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2591 }
|
|
|
2592
|
|
|
2593
|
|
442
|
2594 /****************** Simple error functions class 3 ******************/
|
|
|
2595
|
|
|
2596 /* Simple class 3: Signal an error with a string and an associated object.
|
|
428
|
2597 These functions signal an error of type Qerror, whose data
|
|
|
2598 is two objects, a string and a related Lisp object (usually the object
|
|
|
2599 where the error is occurring). */
|
|
|
2600
|
|
|
2601 DOESNT_RETURN
|
|
442
|
2602 signal_simple_error (const char *reason, Lisp_Object frob)
|
|
428
|
2603 {
|
|
|
2604 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2605 }
|
|
|
2606
|
|
|
2607 void
|
|
442
|
2608 maybe_signal_simple_error (const char *reason, Lisp_Object frob,
|
|
428
|
2609 Lisp_Object class, Error_behavior errb)
|
|
|
2610 {
|
|
|
2611 /* Optimization: */
|
|
|
2612 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2613 return;
|
|
|
2614 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2615 class, errb);
|
|
|
2616 }
|
|
|
2617
|
|
|
2618 Lisp_Object
|
|
442
|
2619 signal_simple_continuable_error (const char *reason, Lisp_Object frob)
|
|
428
|
2620 {
|
|
|
2621 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2622 }
|
|
|
2623
|
|
|
2624 Lisp_Object
|
|
442
|
2625 maybe_signal_simple_continuable_error (const char *reason, Lisp_Object frob,
|
|
428
|
2626 Lisp_Object class, Error_behavior errb)
|
|
|
2627 {
|
|
|
2628 /* Optimization: */
|
|
|
2629 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2630 return Qnil;
|
|
|
2631 return maybe_signal_continuable_error
|
|
|
2632 (Qerror, list2 (build_translated_string (reason),
|
|
|
2633 frob), class, errb);
|
|
|
2634 }
|
|
|
2635
|
|
|
2636
|
|
442
|
2637 /****************** Simple error functions class 4 ******************/
|
|
|
2638
|
|
|
2639 /* Simple class 4: Printf-like functions that signal an error.
|
|
428
|
2640 These functions signal an error of type Qerror, whose data
|
|
|
2641 is a two objects, a string (created using the arguments) and a
|
|
|
2642 Lisp object.
|
|
|
2643 */
|
|
|
2644
|
|
|
2645 DOESNT_RETURN
|
|
442
|
2646 error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
428
|
2647 {
|
|
|
2648 Lisp_Object obj;
|
|
|
2649 va_list args;
|
|
|
2650
|
|
|
2651 va_start (args, fmt);
|
|
442
|
2652 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2653 args);
|
|
|
2654 va_end (args);
|
|
|
2655
|
|
|
2656 /* Fsignal GC-protects its args */
|
|
|
2657 signal_error (Qerror, list2 (obj, frob));
|
|
|
2658 }
|
|
|
2659
|
|
|
2660 void
|
|
|
2661 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
442
|
2662 Error_behavior errb, const char *fmt, ...)
|
|
428
|
2663 {
|
|
|
2664 Lisp_Object obj;
|
|
|
2665 va_list args;
|
|
|
2666
|
|
|
2667 /* Optimization: */
|
|
|
2668 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2669 return;
|
|
|
2670
|
|
|
2671 va_start (args, fmt);
|
|
442
|
2672 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2673 args);
|
|
|
2674 va_end (args);
|
|
|
2675
|
|
|
2676 /* Fsignal GC-protects its args */
|
|
|
2677 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2678 }
|
|
|
2679
|
|
|
2680 Lisp_Object
|
|
442
|
2681 continuable_error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
428
|
2682 {
|
|
|
2683 Lisp_Object obj;
|
|
|
2684 va_list args;
|
|
|
2685
|
|
|
2686 va_start (args, fmt);
|
|
442
|
2687 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2688 args);
|
|
|
2689 va_end (args);
|
|
|
2690
|
|
|
2691 /* Fsignal GC-protects its args */
|
|
|
2692 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2693 }
|
|
|
2694
|
|
|
2695 Lisp_Object
|
|
|
2696 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
442
|
2697 Error_behavior errb, const char *fmt, ...)
|
|
428
|
2698 {
|
|
|
2699 Lisp_Object obj;
|
|
|
2700 va_list args;
|
|
|
2701
|
|
|
2702 /* Optimization: */
|
|
|
2703 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2704 return Qnil;
|
|
|
2705
|
|
|
2706 va_start (args, fmt);
|
|
442
|
2707 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2708 args);
|
|
|
2709 va_end (args);
|
|
|
2710
|
|
|
2711 /* Fsignal GC-protects its args */
|
|
|
2712 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2713 class, errb);
|
|
|
2714 }
|
|
|
2715
|
|
|
2716
|
|
442
|
2717 /****************** Simple error functions class 5 ******************/
|
|
|
2718
|
|
|
2719 /* Simple class 5: Signal an error with a string and two associated objects.
|
|
428
|
2720 These functions signal an error of type Qerror, whose data
|
|
|
2721 is three objects, a string and two related Lisp objects. */
|
|
|
2722
|
|
|
2723 DOESNT_RETURN
|
|
442
|
2724 signal_simple_error_2 (const char *reason,
|
|
428
|
2725 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2726 {
|
|
|
2727 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2728 frob1));
|
|
|
2729 }
|
|
|
2730
|
|
|
2731 void
|
|
442
|
2732 maybe_signal_simple_error_2 (const char *reason, Lisp_Object frob0,
|
|
428
|
2733 Lisp_Object frob1, Lisp_Object class,
|
|
|
2734 Error_behavior errb)
|
|
|
2735 {
|
|
|
2736 /* Optimization: */
|
|
|
2737 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2738 return;
|
|
|
2739 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2740 frob1), class, errb);
|
|
|
2741 }
|
|
|
2742
|
|
|
2743
|
|
|
2744 Lisp_Object
|
|
442
|
2745 signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
428
|
2746 Lisp_Object frob1)
|
|
|
2747 {
|
|
|
2748 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2749 frob1));
|
|
|
2750 }
|
|
|
2751
|
|
|
2752 Lisp_Object
|
|
442
|
2753 maybe_signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
428
|
2754 Lisp_Object frob1, Lisp_Object class,
|
|
|
2755 Error_behavior errb)
|
|
|
2756 {
|
|
|
2757 /* Optimization: */
|
|
|
2758 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2759 return Qnil;
|
|
|
2760 return maybe_signal_continuable_error
|
|
|
2761 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2762 frob1),
|
|
|
2763 class, errb);
|
|
|
2764 }
|
|
|
2765
|
|
|
2766
|
|
|
2767 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2768 void
|
|
|
2769 signal_quit (void)
|
|
|
2770 {
|
|
|
2771 /* This function can GC */
|
|
|
2772 if (EQ (Vquit_flag, Qcritical))
|
|
|
2773 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2774 Vquit_flag = Qnil;
|
|
|
2775 /* note that this is continuable. */
|
|
|
2776 Fsignal (Qquit, Qnil);
|
|
|
2777 }
|
|
|
2778
|
|
|
2779
|
|
|
2780 /* Used in core lisp functions for efficiency */
|
|
436
|
2781 Lisp_Object
|
|
428
|
2782 signal_void_function_error (Lisp_Object function)
|
|
|
2783 {
|
|
436
|
2784 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2785 }
|
|
|
2786
|
|
436
|
2787 Lisp_Object
|
|
428
|
2788 signal_invalid_function_error (Lisp_Object function)
|
|
|
2789 {
|
|
436
|
2790 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2791 }
|
|
|
2792
|
|
436
|
2793 Lisp_Object
|
|
428
|
2794 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2795 {
|
|
436
|
2796 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2797 list2 (function, make_int (nargs)));
|
|
428
|
2798 }
|
|
|
2799
|
|
|
2800 /* Used in list traversal macros for efficiency. */
|
|
436
|
2801 DOESNT_RETURN
|
|
428
|
2802 signal_malformed_list_error (Lisp_Object list)
|
|
|
2803 {
|
|
436
|
2804 signal_error (Qmalformed_list, list1 (list));
|
|
428
|
2805 }
|
|
|
2806
|
|
436
|
2807 DOESNT_RETURN
|
|
428
|
2808 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2809 {
|
|
436
|
2810 signal_error (Qmalformed_property_list, list1 (list));
|
|
428
|
2811 }
|
|
|
2812
|
|
436
|
2813 DOESNT_RETURN
|
|
428
|
2814 signal_circular_list_error (Lisp_Object list)
|
|
|
2815 {
|
|
436
|
2816 signal_error (Qcircular_list, list1 (list));
|
|
428
|
2817 }
|
|
|
2818
|
|
436
|
2819 DOESNT_RETURN
|
|
428
|
2820 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2821 {
|
|
436
|
2822 signal_error (Qcircular_property_list, list1 (list));
|
|
428
|
2823 }
|
|
442
|
2824
|
|
|
2825 DOESNT_RETURN
|
|
|
2826 syntax_error (const char *reason, Lisp_Object frob)
|
|
|
2827 {
|
|
|
2828 signal_type_error (Qsyntax_error, reason, frob);
|
|
|
2829 }
|
|
|
2830
|
|
|
2831 DOESNT_RETURN
|
|
|
2832 syntax_error_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2833 {
|
|
|
2834 signal_type_error_2 (Qsyntax_error, reason, frob1, frob2);
|
|
|
2835 }
|
|
|
2836
|
|
|
2837 DOESNT_RETURN
|
|
|
2838 invalid_argument (const char *reason, Lisp_Object frob)
|
|
|
2839 {
|
|
|
2840 signal_type_error (Qinvalid_argument, reason, frob);
|
|
|
2841 }
|
|
|
2842
|
|
|
2843 DOESNT_RETURN
|
|
|
2844 invalid_argument_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2845 {
|
|
|
2846 signal_type_error_2 (Qinvalid_argument, reason, frob1, frob2);
|
|
|
2847 }
|
|
|
2848
|
|
|
2849 DOESNT_RETURN
|
|
|
2850 invalid_operation (const char *reason, Lisp_Object frob)
|
|
|
2851 {
|
|
|
2852 signal_type_error (Qinvalid_operation, reason, frob);
|
|
|
2853 }
|
|
|
2854
|
|
|
2855 DOESNT_RETURN
|
|
|
2856 invalid_operation_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2857 {
|
|
|
2858 signal_type_error_2 (Qinvalid_operation, reason, frob1, frob2);
|
|
|
2859 }
|
|
|
2860
|
|
|
2861 DOESNT_RETURN
|
|
|
2862 invalid_change (const char *reason, Lisp_Object frob)
|
|
|
2863 {
|
|
|
2864 signal_type_error (Qinvalid_change, reason, frob);
|
|
|
2865 }
|
|
|
2866
|
|
|
2867 DOESNT_RETURN
|
|
|
2868 invalid_change_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2869 {
|
|
|
2870 signal_type_error_2 (Qinvalid_change, reason, frob1, frob2);
|
|
|
2871 }
|
|
|
2872
|
|
428
|
2873
|
|
|
2874 /************************************************************************/
|
|
|
2875 /* User commands */
|
|
|
2876 /************************************************************************/
|
|
|
2877
|
|
|
2878 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
2879 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
2880 This means it contains a description for how to read arguments to give it.
|
|
|
2881 The value is nil for an invalid function or a symbol with no function
|
|
|
2882 definition.
|
|
|
2883
|
|
|
2884 Interactively callable functions include
|
|
|
2885
|
|
|
2886 -- strings and vectors (treated as keyboard macros)
|
|
|
2887 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2888 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2889 (i.e. the interactive flag)
|
|
|
2890 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2891 value
|
|
|
2892 -- subrs (built-in functions) that are interactively callable
|
|
|
2893
|
|
|
2894 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
2895 */
|
|
|
2896 (function))
|
|
|
2897 {
|
|
|
2898 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2899
|
|
|
2900 if (COMPILED_FUNCTIONP (fun))
|
|
|
2901 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2902
|
|
|
2903 /* Lists may represent commands. */
|
|
|
2904 if (CONSP (fun))
|
|
|
2905 {
|
|
|
2906 Lisp_Object funcar = XCAR (fun);
|
|
|
2907 if (EQ (funcar, Qlambda))
|
|
|
2908 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2909 if (EQ (funcar, Qautoload))
|
|
|
2910 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2911 else
|
|
|
2912 return Qnil;
|
|
|
2913 }
|
|
|
2914
|
|
|
2915 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2916 interactive spec. */
|
|
|
2917 if (SUBRP (fun))
|
|
|
2918 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2919
|
|
|
2920 /* Strings and vectors are keyboard macros. */
|
|
|
2921 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2922 return Qt;
|
|
|
2923
|
|
|
2924 /* Everything else (including Qunbound) is not a command. */
|
|
|
2925 return Qnil;
|
|
|
2926 }
|
|
|
2927
|
|
|
2928 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
2929 Execute CMD as an editor command.
|
|
|
2930 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2931 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2932 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2933 when reading the arguments.
|
|
|
2934 */
|
|
|
2935 (cmd, record, keys))
|
|
|
2936 {
|
|
|
2937 /* This function can GC */
|
|
|
2938 Lisp_Object prefixarg;
|
|
|
2939 Lisp_Object final = cmd;
|
|
|
2940 struct backtrace backtrace;
|
|
|
2941 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2942
|
|
|
2943 prefixarg = con->prefix_arg;
|
|
|
2944 con->prefix_arg = Qnil;
|
|
|
2945 Vcurrent_prefix_arg = prefixarg;
|
|
|
2946 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2947
|
|
|
2948 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2949 return run_hook (Vdisabled_command_hook);
|
|
|
2950
|
|
|
2951 for (;;)
|
|
|
2952 {
|
|
|
2953 final = indirect_function (cmd, 1);
|
|
|
2954 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2955 do_autoload (final, cmd);
|
|
|
2956 else
|
|
|
2957 break;
|
|
|
2958 }
|
|
|
2959
|
|
|
2960 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2961 {
|
|
|
2962 backtrace.function = &Qcall_interactively;
|
|
|
2963 backtrace.args = &cmd;
|
|
|
2964 backtrace.nargs = 1;
|
|
|
2965 backtrace.evalargs = 0;
|
|
|
2966 backtrace.pdlcount = specpdl_depth();
|
|
|
2967 backtrace.debug_on_exit = 0;
|
|
|
2968 PUSH_BACKTRACE (backtrace);
|
|
|
2969
|
|
|
2970 final = Fcall_interactively (cmd, record, keys);
|
|
|
2971
|
|
|
2972 POP_BACKTRACE (backtrace);
|
|
|
2973 return final;
|
|
|
2974 }
|
|
|
2975 else if (STRINGP (final) || VECTORP (final))
|
|
|
2976 {
|
|
|
2977 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2978 }
|
|
|
2979 else
|
|
|
2980 {
|
|
|
2981 Fsignal (Qwrong_type_argument,
|
|
|
2982 Fcons (Qcommandp,
|
|
|
2983 (EQ (cmd, final)
|
|
|
2984 ? list1 (cmd)
|
|
|
2985 : list2 (cmd, final))));
|
|
|
2986 return Qnil;
|
|
|
2987 }
|
|
|
2988 }
|
|
|
2989
|
|
|
2990 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
2991 Return t if function in which this appears was called interactively.
|
|
|
2992 This means that the function was called with call-interactively (which
|
|
|
2993 includes being called as the binding of a key)
|
|
|
2994 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
2995 */
|
|
|
2996 ())
|
|
|
2997 {
|
|
|
2998 REGISTER struct backtrace *btp;
|
|
|
2999 REGISTER Lisp_Object fun;
|
|
|
3000
|
|
|
3001 if (!INTERACTIVE)
|
|
|
3002 return Qnil;
|
|
|
3003
|
|
|
3004 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
3005 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
3006 function). Note that *btp->function may be a symbol pointing at a
|
|
|
3007 compiled function. */
|
|
|
3008 btp = backtrace_list;
|
|
|
3009
|
|
|
3010 #if 0 /* FSFmacs */
|
|
|
3011
|
|
|
3012 /* #### FSFmacs does the following instead. I can't figure
|
|
|
3013 out which one is more correct. */
|
|
|
3014 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
3015 the top for Finteractive_p itself. If so, skip it. */
|
|
|
3016 fun = Findirect_function (*btp->function);
|
|
|
3017 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
3018 btp = btp->next;
|
|
|
3019
|
|
|
3020 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
3021 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
3022 definition, this function isn't really being called
|
|
|
3023 interactively, but because that's the way Emacs 18 always builds
|
|
|
3024 byte-compiled functions, we'll accept it for now. */
|
|
|
3025 if (EQ (*btp->function, Qbyte_code))
|
|
|
3026 btp = btp->next;
|
|
|
3027
|
|
|
3028 /* If this isn't a byte-compiled function, then we may now be
|
|
|
3029 looking at several frames for special forms. Skip past them. */
|
|
|
3030 while (btp &&
|
|
|
3031 btp->nargs == UNEVALLED)
|
|
|
3032 btp = btp->next;
|
|
|
3033
|
|
|
3034 #else
|
|
|
3035
|
|
|
3036 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
3037 btp = btp->next;
|
|
|
3038 for (;
|
|
|
3039 btp && (btp->nargs == UNEVALLED
|
|
|
3040 || EQ (*btp->function, Qbyte_code));
|
|
|
3041 btp = btp->next)
|
|
|
3042 {}
|
|
|
3043 /* btp now points at the frame of the innermost function
|
|
|
3044 that DOES eval its args.
|
|
|
3045 If it is a built-in function (such as load or eval-region)
|
|
|
3046 return nil. */
|
|
|
3047 /* Beats me why this is necessary, but it is */
|
|
|
3048 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
3049 return Qt;
|
|
|
3050
|
|
|
3051 #endif
|
|
|
3052
|
|
|
3053 fun = Findirect_function (*btp->function);
|
|
|
3054 if (SUBRP (fun))
|
|
|
3055 return Qnil;
|
|
|
3056 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
3057 Return t if that function was called interactively. */
|
|
|
3058 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
3059 return Qt;
|
|
|
3060 return Qnil;
|
|
|
3061 }
|
|
|
3062
|
|
|
3063
|
|
|
3064 /************************************************************************/
|
|
|
3065 /* Autoloading */
|
|
|
3066 /************************************************************************/
|
|
|
3067
|
|
|
3068 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
|
3069 Define FUNCTION to autoload from FILE.
|
|
|
3070 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
3071 Third arg DOCSTRING is documentation for the function.
|
|
|
3072 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
3073 Fifth arg TYPE indicates the type of the object:
|
|
|
3074 nil or omitted says FUNCTION is a function,
|
|
|
3075 `keymap' says FUNCTION is really a keymap, and
|
|
|
3076 `macro' or t says FUNCTION is really a macro.
|
|
|
3077 Third through fifth args give info about the real definition.
|
|
|
3078 They default to nil.
|
|
|
3079 If FUNCTION is already defined other than as an autoload,
|
|
|
3080 this does nothing and returns nil.
|
|
|
3081 */
|
|
|
3082 (function, file, docstring, interactive, type))
|
|
|
3083 {
|
|
|
3084 /* This function can GC */
|
|
|
3085 CHECK_SYMBOL (function);
|
|
|
3086 CHECK_STRING (file);
|
|
|
3087
|
|
|
3088 /* If function is defined and not as an autoload, don't override */
|
|
|
3089 {
|
|
|
3090 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
3091 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
3092 return Qnil;
|
|
|
3093 }
|
|
|
3094
|
|
|
3095 if (purify_flag)
|
|
|
3096 {
|
|
|
3097 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
3098 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
3099 }
|
|
440
|
3100
|
|
428
|
3101 return Ffset (function, Fcons (Qautoload, list4 (file,
|
|
|
3102 docstring,
|
|
|
3103 interactive,
|
|
|
3104 type)));
|
|
|
3105 }
|
|
|
3106
|
|
|
3107 Lisp_Object
|
|
|
3108 un_autoload (Lisp_Object oldqueue)
|
|
|
3109 {
|
|
|
3110 /* This function can GC */
|
|
|
3111 REGISTER Lisp_Object queue, first, second;
|
|
|
3112
|
|
|
3113 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
3114 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
3115 queue = Vautoload_queue;
|
|
|
3116 Vautoload_queue = oldqueue;
|
|
|
3117 while (CONSP (queue))
|
|
|
3118 {
|
|
|
3119 first = XCAR (queue);
|
|
|
3120 second = Fcdr (first);
|
|
|
3121 first = Fcar (first);
|
|
|
3122 if (NILP (second))
|
|
|
3123 Vfeatures = first;
|
|
|
3124 else
|
|
|
3125 Ffset (first, second);
|
|
|
3126 queue = Fcdr (queue);
|
|
|
3127 }
|
|
|
3128 return Qnil;
|
|
|
3129 }
|
|
|
3130
|
|
|
3131 void
|
|
|
3132 do_autoload (Lisp_Object fundef,
|
|
|
3133 Lisp_Object funname)
|
|
|
3134 {
|
|
|
3135 /* This function can GC */
|
|
|
3136 int speccount = specpdl_depth();
|
|
|
3137 Lisp_Object fun = funname;
|
|
|
3138 struct gcpro gcpro1, gcpro2;
|
|
|
3139
|
|
|
3140 CHECK_SYMBOL (funname);
|
|
|
3141 GCPRO2 (fun, funname);
|
|
|
3142
|
|
|
3143 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
3144 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
3145 Vautoload_queue = Qt;
|
|
|
3146 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
3147
|
|
|
3148 {
|
|
|
3149 Lisp_Object queue;
|
|
|
3150
|
|
|
3151 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
3152 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
3153 {
|
|
|
3154 Lisp_Object first = XCAR (queue);
|
|
|
3155 Lisp_Object second = Fcdr (first);
|
|
|
3156
|
|
|
3157 first = Fcar (first);
|
|
|
3158
|
|
|
3159 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
3160 may be an atom if the autoload entry was generated by a defalias
|
|
|
3161 or fset. */
|
|
|
3162 if (CONSP (second))
|
|
|
3163 Fput (first, Qautoload, (XCDR (second)));
|
|
|
3164 }
|
|
|
3165 }
|
|
|
3166
|
|
|
3167 /* Once loading finishes, don't undo it. */
|
|
|
3168 Vautoload_queue = Qt;
|
|
|
3169 unbind_to (speccount, Qnil);
|
|
|
3170
|
|
|
3171 fun = indirect_function (fun, 0);
|
|
|
3172
|
|
|
3173 #if 0 /* FSFmacs */
|
|
|
3174 if (!NILP (Fequal (fun, fundef)))
|
|
|
3175 #else
|
|
|
3176 if (UNBOUNDP (fun)
|
|
|
3177 || (CONSP (fun)
|
|
|
3178 && EQ (XCAR (fun), Qautoload)))
|
|
|
3179 #endif
|
|
|
3180 error ("Autoloading failed to define function %s",
|
|
|
3181 string_data (XSYMBOL (funname)->name));
|
|
|
3182 UNGCPRO;
|
|
|
3183 }
|
|
|
3184
|
|
|
3185
|
|
|
3186 /************************************************************************/
|
|
|
3187 /* eval, funcall, apply */
|
|
|
3188 /************************************************************************/
|
|
|
3189
|
|
|
3190 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
442
|
3191 int nargs, Lisp_Object args[]);
|
|
428
|
3192 static int in_warnings;
|
|
|
3193
|
|
|
3194 static Lisp_Object
|
|
|
3195 in_warnings_restore (Lisp_Object minimus)
|
|
|
3196 {
|
|
|
3197 in_warnings = 0;
|
|
|
3198 return Qnil;
|
|
|
3199 }
|
|
|
3200
|
|
|
3201 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
3202 Evaluate FORM and return its value.
|
|
|
3203 */
|
|
|
3204 (form))
|
|
|
3205 {
|
|
|
3206 /* This function can GC */
|
|
|
3207 Lisp_Object fun, val, original_fun, original_args;
|
|
|
3208 int nargs;
|
|
|
3209 struct backtrace backtrace;
|
|
|
3210
|
|
|
3211 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
3212 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
3213 {
|
|
|
3214 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
3215 int speccount = specpdl_depth();
|
|
|
3216 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
3217
|
|
|
3218 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
3219 in_warnings = 1;
|
|
|
3220 this_warning_cons = Vpending_warnings;
|
|
|
3221 this_warning = XCAR (this_warning_cons);
|
|
|
3222 /* in case an error occurs in the warn function, at least
|
|
|
3223 it won't happen infinitely */
|
|
|
3224 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
3225 free_cons (XCONS (this_warning_cons));
|
|
|
3226 class = XCAR (this_warning);
|
|
|
3227 level = XCAR (XCDR (this_warning));
|
|
|
3228 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
3229 free_list (this_warning);
|
|
|
3230
|
|
|
3231 if (NILP (Vpending_warnings))
|
|
|
3232 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
3233 but safer */
|
|
|
3234
|
|
|
3235 GCPRO4 (form, class, level, messij);
|
|
|
3236 if (!STRINGP (messij))
|
|
|
3237 messij = Fprin1_to_string (messij, Qnil);
|
|
|
3238 call3 (Qdisplay_warning, class, messij, level);
|
|
|
3239 UNGCPRO;
|
|
|
3240 unbind_to (speccount, Qnil);
|
|
|
3241 }
|
|
|
3242
|
|
|
3243 if (!CONSP (form))
|
|
|
3244 {
|
|
|
3245 if (SYMBOLP (form))
|
|
|
3246 return Fsymbol_value (form);
|
|
|
3247 else
|
|
|
3248 return form;
|
|
|
3249 }
|
|
|
3250
|
|
|
3251 QUIT;
|
|
|
3252 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3253 {
|
|
|
3254 struct gcpro gcpro1;
|
|
|
3255 GCPRO1 (form);
|
|
|
3256 garbage_collect_1 ();
|
|
|
3257 UNGCPRO;
|
|
|
3258 }
|
|
|
3259
|
|
|
3260 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3261 {
|
|
|
3262 if (max_lisp_eval_depth < 100)
|
|
|
3263 max_lisp_eval_depth = 100;
|
|
|
3264 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3265 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3266 }
|
|
|
3267
|
|
|
3268 /* We guaranteed CONSP (form) above */
|
|
|
3269 original_fun = XCAR (form);
|
|
|
3270 original_args = XCDR (form);
|
|
|
3271
|
|
|
3272 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
3273
|
|
|
3274 backtrace.pdlcount = specpdl_depth();
|
|
|
3275 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3276 backtrace.args = &original_args;
|
|
|
3277 backtrace.nargs = UNEVALLED;
|
|
|
3278 backtrace.evalargs = 1;
|
|
|
3279 backtrace.debug_on_exit = 0;
|
|
|
3280 PUSH_BACKTRACE (backtrace);
|
|
|
3281
|
|
|
3282 if (debug_on_next_call)
|
|
|
3283 do_debug_on_call (Qt);
|
|
|
3284
|
|
|
3285 if (profiling_active)
|
|
|
3286 profile_increase_call_count (original_fun);
|
|
|
3287
|
|
|
3288 /* At this point, only original_fun and original_args
|
|
|
3289 have values that will be used below. */
|
|
|
3290 retry:
|
|
|
3291 fun = indirect_function (original_fun, 1);
|
|
|
3292
|
|
|
3293 if (SUBRP (fun))
|
|
|
3294 {
|
|
|
3295 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3296 int max_args = subr->max_args;
|
|
|
3297
|
|
|
3298 if (nargs < subr->min_args)
|
|
|
3299 goto wrong_number_of_arguments;
|
|
|
3300
|
|
|
3301 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
3302 {
|
|
|
3303 backtrace.evalargs = 0;
|
|
|
3304 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
3305 (original_args));
|
|
|
3306 }
|
|
|
3307 else if (nargs <= max_args)
|
|
|
3308 {
|
|
|
3309 struct gcpro gcpro1;
|
|
|
3310 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
3311 REGISTER Lisp_Object *p = args;
|
|
|
3312
|
|
|
3313 GCPRO1 (args[0]);
|
|
|
3314 gcpro1.nvars = 0;
|
|
|
3315
|
|
|
3316 {
|
|
|
3317 LIST_LOOP_2 (arg, original_args)
|
|
|
3318 {
|
|
|
3319 *p++ = Feval (arg);
|
|
|
3320 gcpro1.nvars++;
|
|
|
3321 }
|
|
|
3322 }
|
|
|
3323
|
|
|
3324 /* &optional args default to nil. */
|
|
|
3325 while (p - args < max_args)
|
|
|
3326 *p++ = Qnil;
|
|
|
3327
|
|
|
3328 backtrace.args = args;
|
|
|
3329 backtrace.nargs = nargs;
|
|
|
3330
|
|
|
3331 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3332
|
|
|
3333 UNGCPRO;
|
|
|
3334 }
|
|
|
3335 else if (max_args == MANY)
|
|
|
3336 {
|
|
|
3337 /* Pass a vector of evaluated arguments */
|
|
|
3338 struct gcpro gcpro1;
|
|
|
3339 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3340 REGISTER Lisp_Object *p = args;
|
|
|
3341
|
|
|
3342 GCPRO1 (args[0]);
|
|
|
3343 gcpro1.nvars = 0;
|
|
|
3344
|
|
|
3345 {
|
|
|
3346 LIST_LOOP_2 (arg, original_args)
|
|
|
3347 {
|
|
|
3348 *p++ = Feval (arg);
|
|
|
3349 gcpro1.nvars++;
|
|
|
3350 }
|
|
|
3351 }
|
|
|
3352
|
|
|
3353 backtrace.args = args;
|
|
|
3354 backtrace.nargs = nargs;
|
|
|
3355
|
|
|
3356 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3357 (nargs, args));
|
|
|
3358
|
|
|
3359 UNGCPRO;
|
|
|
3360 }
|
|
|
3361 else
|
|
|
3362 {
|
|
|
3363 wrong_number_of_arguments:
|
|
440
|
3364 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
428
|
3365 }
|
|
|
3366 }
|
|
|
3367 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3368 {
|
|
|
3369 struct gcpro gcpro1;
|
|
|
3370 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3371 REGISTER Lisp_Object *p = args;
|
|
|
3372
|
|
|
3373 GCPRO1 (args[0]);
|
|
|
3374 gcpro1.nvars = 0;
|
|
|
3375
|
|
|
3376 {
|
|
|
3377 LIST_LOOP_2 (arg, original_args)
|
|
|
3378 {
|
|
|
3379 *p++ = Feval (arg);
|
|
|
3380 gcpro1.nvars++;
|
|
|
3381 }
|
|
|
3382 }
|
|
|
3383
|
|
|
3384 backtrace.args = args;
|
|
|
3385 backtrace.nargs = nargs;
|
|
|
3386 backtrace.evalargs = 0;
|
|
|
3387
|
|
|
3388 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3389
|
|
|
3390 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3391 if (backtrace.debug_on_exit)
|
|
|
3392 val = do_debug_on_exit (val);
|
|
|
3393 /* Don't do it again when we return to eval. */
|
|
|
3394 backtrace.debug_on_exit = 0;
|
|
|
3395
|
|
|
3396 UNGCPRO;
|
|
|
3397 }
|
|
|
3398 else if (CONSP (fun))
|
|
|
3399 {
|
|
|
3400 Lisp_Object funcar = XCAR (fun);
|
|
|
3401
|
|
|
3402 if (EQ (funcar, Qautoload))
|
|
|
3403 {
|
|
|
3404 do_autoload (fun, original_fun);
|
|
|
3405 goto retry;
|
|
|
3406 }
|
|
|
3407 else if (EQ (funcar, Qmacro))
|
|
|
3408 {
|
|
|
3409 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3410 }
|
|
|
3411 else if (EQ (funcar, Qlambda))
|
|
|
3412 {
|
|
|
3413 struct gcpro gcpro1;
|
|
|
3414 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3415 REGISTER Lisp_Object *p = args;
|
|
|
3416
|
|
|
3417 GCPRO1 (args[0]);
|
|
|
3418 gcpro1.nvars = 0;
|
|
|
3419
|
|
|
3420 {
|
|
|
3421 LIST_LOOP_2 (arg, original_args)
|
|
|
3422 {
|
|
|
3423 *p++ = Feval (arg);
|
|
|
3424 gcpro1.nvars++;
|
|
|
3425 }
|
|
|
3426 }
|
|
|
3427
|
|
|
3428 UNGCPRO;
|
|
|
3429
|
|
|
3430 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3431 backtrace.nargs = nargs;
|
|
|
3432 backtrace.evalargs = 0;
|
|
|
3433
|
|
|
3434 val = funcall_lambda (fun, nargs, args);
|
|
|
3435
|
|
|
3436 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3437 if (backtrace.debug_on_exit)
|
|
|
3438 val = do_debug_on_exit (val);
|
|
|
3439 /* Don't do it again when we return to eval. */
|
|
|
3440 backtrace.debug_on_exit = 0;
|
|
|
3441 }
|
|
|
3442 else
|
|
|
3443 {
|
|
|
3444 goto invalid_function;
|
|
|
3445 }
|
|
|
3446 }
|
|
|
3447 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3448 {
|
|
|
3449 invalid_function:
|
|
436
|
3450 val = signal_invalid_function_error (fun);
|
|
428
|
3451 }
|
|
|
3452
|
|
|
3453 lisp_eval_depth--;
|
|
|
3454 if (backtrace.debug_on_exit)
|
|
|
3455 val = do_debug_on_exit (val);
|
|
|
3456 POP_BACKTRACE (backtrace);
|
|
|
3457 return val;
|
|
|
3458 }
|
|
|
3459
|
|
|
3460
|
|
|
3461 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3462 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3463 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3464 */
|
|
|
3465 (int nargs, Lisp_Object *args))
|
|
|
3466 {
|
|
|
3467 /* This function can GC */
|
|
|
3468 Lisp_Object fun;
|
|
|
3469 Lisp_Object val;
|
|
|
3470 struct backtrace backtrace;
|
|
|
3471 int fun_nargs = nargs - 1;
|
|
|
3472 Lisp_Object *fun_args = args + 1;
|
|
|
3473
|
|
|
3474 QUIT;
|
|
|
3475 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3476 /* Callers should gcpro lexpr args */
|
|
|
3477 garbage_collect_1 ();
|
|
|
3478
|
|
|
3479 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3480 {
|
|
|
3481 if (max_lisp_eval_depth < 100)
|
|
|
3482 max_lisp_eval_depth = 100;
|
|
|
3483 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3484 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3485 }
|
|
|
3486
|
|
|
3487 backtrace.pdlcount = specpdl_depth();
|
|
|
3488 backtrace.function = &args[0];
|
|
|
3489 backtrace.args = fun_args;
|
|
|
3490 backtrace.nargs = fun_nargs;
|
|
|
3491 backtrace.evalargs = 0;
|
|
|
3492 backtrace.debug_on_exit = 0;
|
|
|
3493 PUSH_BACKTRACE (backtrace);
|
|
|
3494
|
|
|
3495 if (debug_on_next_call)
|
|
|
3496 do_debug_on_call (Qlambda);
|
|
|
3497
|
|
|
3498 retry:
|
|
|
3499
|
|
|
3500 fun = args[0];
|
|
|
3501
|
|
|
3502 /* It might be useful to place this *after* all the checks. */
|
|
|
3503 if (profiling_active)
|
|
|
3504 profile_increase_call_count (fun);
|
|
|
3505
|
|
|
3506 /* We could call indirect_function directly, but profiling shows
|
|
|
3507 this is worth optimizing by partially unrolling the loop. */
|
|
|
3508 if (SYMBOLP (fun))
|
|
|
3509 {
|
|
|
3510 fun = XSYMBOL (fun)->function;
|
|
|
3511 if (SYMBOLP (fun))
|
|
|
3512 {
|
|
|
3513 fun = XSYMBOL (fun)->function;
|
|
|
3514 if (SYMBOLP (fun))
|
|
|
3515 fun = indirect_function (fun, 1);
|
|
|
3516 }
|
|
|
3517 }
|
|
|
3518
|
|
|
3519 if (SUBRP (fun))
|
|
|
3520 {
|
|
|
3521 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3522 int max_args = subr->max_args;
|
|
|
3523 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3524
|
|
|
3525 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3526 {
|
|
|
3527 funcall_subr:
|
|
|
3528 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
|
3529 }
|
|
436
|
3530 else if (fun_nargs < subr->min_args)
|
|
|
3531 {
|
|
|
3532 goto wrong_number_of_arguments;
|
|
|
3533 }
|
|
428
|
3534 else if (fun_nargs < max_args)
|
|
|
3535 {
|
|
|
3536 Lisp_Object *p = spacious_args;
|
|
|
3537
|
|
|
3538 /* Default optionals to nil */
|
|
|
3539 while (fun_nargs--)
|
|
|
3540 *p++ = *fun_args++;
|
|
|
3541 while (p - spacious_args < max_args)
|
|
|
3542 *p++ = Qnil;
|
|
|
3543
|
|
|
3544 fun_args = spacious_args;
|
|
|
3545 goto funcall_subr;
|
|
|
3546 }
|
|
|
3547 else if (max_args == MANY)
|
|
|
3548 {
|
|
436
|
3549 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
428
|
3550 }
|
|
|
3551 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3552 {
|
|
|
3553 goto invalid_function;
|
|
|
3554 }
|
|
|
3555 else
|
|
|
3556 {
|
|
|
3557 wrong_number_of_arguments:
|
|
436
|
3558 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3559 }
|
|
|
3560 }
|
|
|
3561 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3562 {
|
|
|
3563 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
|
3564 }
|
|
|
3565 else if (CONSP (fun))
|
|
|
3566 {
|
|
|
3567 Lisp_Object funcar = XCAR (fun);
|
|
|
3568
|
|
|
3569 if (EQ (funcar, Qlambda))
|
|
|
3570 {
|
|
|
3571 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3572 }
|
|
|
3573 else if (EQ (funcar, Qautoload))
|
|
|
3574 {
|
|
|
3575 do_autoload (fun, args[0]);
|
|
|
3576 goto retry;
|
|
|
3577 }
|
|
|
3578 else /* Can't funcall a macro */
|
|
|
3579 {
|
|
|
3580 goto invalid_function;
|
|
|
3581 }
|
|
|
3582 }
|
|
|
3583 else if (UNBOUNDP (fun))
|
|
|
3584 {
|
|
436
|
3585 val = signal_void_function_error (args[0]);
|
|
428
|
3586 }
|
|
|
3587 else
|
|
|
3588 {
|
|
|
3589 invalid_function:
|
|
436
|
3590 val = signal_invalid_function_error (fun);
|
|
428
|
3591 }
|
|
|
3592
|
|
|
3593 lisp_eval_depth--;
|
|
|
3594 if (backtrace.debug_on_exit)
|
|
|
3595 val = do_debug_on_exit (val);
|
|
|
3596 POP_BACKTRACE (backtrace);
|
|
|
3597 return val;
|
|
|
3598 }
|
|
|
3599
|
|
|
3600 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3601 Return t if OBJECT can be called as a function, else nil.
|
|
|
3602 A function is an object that can be applied to arguments,
|
|
|
3603 using for example `funcall' or `apply'.
|
|
|
3604 */
|
|
|
3605 (object))
|
|
|
3606 {
|
|
|
3607 if (SYMBOLP (object))
|
|
|
3608 object = indirect_function (object, 0);
|
|
|
3609
|
|
|
3610 return
|
|
|
3611 (SUBRP (object) ||
|
|
|
3612 COMPILED_FUNCTIONP (object) ||
|
|
|
3613 (CONSP (object) &&
|
|
|
3614 (EQ (XCAR (object), Qlambda) ||
|
|
|
3615 EQ (XCAR (object), Qautoload))))
|
|
|
3616 ? Qt : Qnil;
|
|
|
3617 }
|
|
|
3618
|
|
|
3619 static Lisp_Object
|
|
|
3620 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
3621 {
|
|
|
3622 Lisp_Object orig_function = function;
|
|
|
3623 Lisp_Object arglist;
|
|
|
3624
|
|
|
3625 retry:
|
|
|
3626
|
|
|
3627 if (SYMBOLP (function))
|
|
|
3628 function = indirect_function (function, 1);
|
|
|
3629
|
|
|
3630 if (SUBRP (function))
|
|
|
3631 {
|
|
442
|
3632 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
3633 if (function_min_args_p)
|
|
|
3634 return Fsubr_min_args (function);
|
|
|
3635 else
|
|
|
3636 return Fsubr_max_args (function);
|
|
428
|
3637 }
|
|
|
3638 else if (COMPILED_FUNCTIONP (function))
|
|
|
3639 {
|
|
|
3640 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
|
3641 }
|
|
|
3642 else if (CONSP (function))
|
|
|
3643 {
|
|
|
3644 Lisp_Object funcar = XCAR (function);
|
|
|
3645
|
|
|
3646 if (EQ (funcar, Qmacro))
|
|
|
3647 {
|
|
|
3648 function = XCDR (function);
|
|
|
3649 goto retry;
|
|
|
3650 }
|
|
|
3651 else if (EQ (funcar, Qautoload))
|
|
|
3652 {
|
|
442
|
3653 struct gcpro gcpro1;
|
|
|
3654
|
|
|
3655 GCPRO1 (function);
|
|
428
|
3656 do_autoload (function, orig_function);
|
|
442
|
3657 UNGCPRO;
|
|
|
3658 function = orig_function;
|
|
428
|
3659 goto retry;
|
|
|
3660 }
|
|
|
3661 else if (EQ (funcar, Qlambda))
|
|
|
3662 {
|
|
|
3663 arglist = Fcar (XCDR (function));
|
|
|
3664 }
|
|
|
3665 else
|
|
|
3666 {
|
|
|
3667 goto invalid_function;
|
|
|
3668 }
|
|
|
3669 }
|
|
|
3670 else
|
|
|
3671 {
|
|
|
3672 invalid_function:
|
|
442
|
3673 return signal_invalid_function_error (orig_function);
|
|
428
|
3674 }
|
|
|
3675
|
|
|
3676 {
|
|
|
3677 int argcount = 0;
|
|
|
3678
|
|
|
3679 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3680 {
|
|
|
3681 if (EQ (arg, Qand_optional))
|
|
|
3682 {
|
|
|
3683 if (function_min_args_p)
|
|
|
3684 break;
|
|
|
3685 }
|
|
|
3686 else if (EQ (arg, Qand_rest))
|
|
|
3687 {
|
|
|
3688 if (function_min_args_p)
|
|
|
3689 break;
|
|
|
3690 else
|
|
|
3691 return Qnil;
|
|
|
3692 }
|
|
|
3693 else
|
|
|
3694 {
|
|
|
3695 argcount++;
|
|
|
3696 }
|
|
|
3697 }
|
|
|
3698
|
|
|
3699 return make_int (argcount);
|
|
|
3700 }
|
|
|
3701 }
|
|
|
3702
|
|
|
3703 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3704 Return the number of arguments a function may be called with.
|
|
|
3705 The function may be any form that can be passed to `funcall',
|
|
|
3706 any special form, or any macro.
|
|
|
3707 */
|
|
|
3708 (function))
|
|
|
3709 {
|
|
|
3710 return function_argcount (function, 1);
|
|
|
3711 }
|
|
|
3712
|
|
|
3713 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3714 Return the number of arguments a function may be called with.
|
|
|
3715 The function may be any form that can be passed to `funcall',
|
|
|
3716 any special form, or any macro.
|
|
|
3717 If the function takes an arbitrary number of arguments or is
|
|
|
3718 a built-in special form, nil is returned.
|
|
|
3719 */
|
|
|
3720 (function))
|
|
|
3721 {
|
|
|
3722 return function_argcount (function, 0);
|
|
|
3723 }
|
|
|
3724
|
|
|
3725
|
|
|
3726 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
3727 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
3728 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
3729 */
|
|
|
3730 (int nargs, Lisp_Object *args))
|
|
|
3731 {
|
|
|
3732 /* This function can GC */
|
|
|
3733 Lisp_Object fun = args[0];
|
|
|
3734 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3735 int numargs;
|
|
|
3736 int funcall_nargs;
|
|
|
3737
|
|
|
3738 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
3739
|
|
|
3740 if (numargs == 0)
|
|
|
3741 /* (apply foo 0 1 '()) */
|
|
|
3742 return Ffuncall (nargs - 1, args);
|
|
|
3743 else if (numargs == 1)
|
|
|
3744 {
|
|
|
3745 /* (apply foo 0 1 '(2)) */
|
|
|
3746 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3747 return Ffuncall (nargs, args);
|
|
|
3748 }
|
|
|
3749
|
|
|
3750 /* -1 for function, -1 for spread arg */
|
|
|
3751 numargs = nargs - 2 + numargs;
|
|
|
3752 /* +1 for function */
|
|
|
3753 funcall_nargs = 1 + numargs;
|
|
|
3754
|
|
|
3755 if (SYMBOLP (fun))
|
|
|
3756 fun = indirect_function (fun, 0);
|
|
|
3757
|
|
|
3758 if (SUBRP (fun))
|
|
|
3759 {
|
|
|
3760 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3761 int max_args = subr->max_args;
|
|
|
3762
|
|
|
3763 if (numargs < subr->min_args
|
|
|
3764 || (max_args >= 0 && max_args < numargs))
|
|
|
3765 {
|
|
|
3766 /* Let funcall get the error */
|
|
|
3767 }
|
|
|
3768 else if (max_args > numargs)
|
|
|
3769 {
|
|
|
3770 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3771 by explicitly supplying nil's for optional values */
|
|
|
3772 funcall_nargs += (max_args - numargs);
|
|
|
3773 }
|
|
|
3774 }
|
|
|
3775 else if (UNBOUNDP (fun))
|
|
|
3776 {
|
|
|
3777 /* Let funcall get the error */
|
|
|
3778 fun = args[0];
|
|
|
3779 }
|
|
|
3780
|
|
|
3781 {
|
|
|
3782 REGISTER int i;
|
|
|
3783 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
3784 struct gcpro gcpro1;
|
|
|
3785
|
|
|
3786 GCPRO1 (*funcall_args);
|
|
|
3787 gcpro1.nvars = funcall_nargs;
|
|
|
3788
|
|
|
3789 /* Copy in the unspread args */
|
|
|
3790 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3791 /* Spread the last arg we got. Its first element goes in
|
|
|
3792 the slot that it used to occupy, hence this value of I. */
|
|
|
3793 for (i = nargs - 1;
|
|
|
3794 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3795 i++, spread_arg = XCDR (spread_arg))
|
|
|
3796 {
|
|
|
3797 funcall_args [i] = XCAR (spread_arg);
|
|
|
3798 }
|
|
|
3799 /* Supply nil for optional args (to subrs) */
|
|
|
3800 for (; i < funcall_nargs; i++)
|
|
|
3801 funcall_args[i] = Qnil;
|
|
|
3802
|
|
|
3803
|
|
|
3804 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3805 }
|
|
|
3806 }
|
|
|
3807
|
|
|
3808
|
|
|
3809 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3810 return the result of evaluation. */
|
|
|
3811
|
|
|
3812 static Lisp_Object
|
|
|
3813 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3814 {
|
|
|
3815 /* This function can GC */
|
|
442
|
3816 Lisp_Object arglist, body, tail;
|
|
428
|
3817 int speccount = specpdl_depth();
|
|
|
3818 REGISTER int i = 0;
|
|
|
3819
|
|
|
3820 tail = XCDR (fun);
|
|
|
3821
|
|
|
3822 if (!CONSP (tail))
|
|
|
3823 goto invalid_function;
|
|
|
3824
|
|
|
3825 arglist = XCAR (tail);
|
|
|
3826 body = XCDR (tail);
|
|
|
3827
|
|
|
3828 {
|
|
|
3829 int optional = 0, rest = 0;
|
|
|
3830
|
|
442
|
3831 EXTERNAL_LIST_LOOP_2 (symbol, arglist)
|
|
428
|
3832 {
|
|
|
3833 if (!SYMBOLP (symbol))
|
|
|
3834 goto invalid_function;
|
|
|
3835 if (EQ (symbol, Qand_rest))
|
|
|
3836 rest = 1;
|
|
|
3837 else if (EQ (symbol, Qand_optional))
|
|
|
3838 optional = 1;
|
|
|
3839 else if (rest)
|
|
|
3840 {
|
|
|
3841 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3842 i = nargs;
|
|
|
3843 }
|
|
|
3844 else if (i < nargs)
|
|
|
3845 specbind (symbol, args[i++]);
|
|
|
3846 else if (!optional)
|
|
|
3847 goto wrong_number_of_arguments;
|
|
|
3848 else
|
|
|
3849 specbind (symbol, Qnil);
|
|
|
3850 }
|
|
|
3851 }
|
|
|
3852
|
|
|
3853 if (i < nargs)
|
|
|
3854 goto wrong_number_of_arguments;
|
|
|
3855
|
|
|
3856 return unbind_to (speccount, Fprogn (body));
|
|
|
3857
|
|
|
3858 wrong_number_of_arguments:
|
|
436
|
3859 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
3860
|
|
|
3861 invalid_function:
|
|
436
|
3862 return signal_invalid_function_error (fun);
|
|
428
|
3863 }
|
|
|
3864
|
|
|
3865
|
|
|
3866 /************************************************************************/
|
|
|
3867 /* Run hook variables in various ways. */
|
|
|
3868 /************************************************************************/
|
|
|
3869
|
|
|
3870 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
3871 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3872 Each argument should be a symbol, a hook variable.
|
|
|
3873 These symbols are processed in the order specified.
|
|
|
3874 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3875 or a list of functions to be called to run the hook.
|
|
|
3876 If the value is a function, it is called with no arguments.
|
|
|
3877 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3878
|
|
|
3879 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3880 not `make-local-variable'.
|
|
|
3881 */
|
|
|
3882 (int nargs, Lisp_Object *args))
|
|
|
3883 {
|
|
|
3884 REGISTER int i;
|
|
|
3885
|
|
|
3886 for (i = 0; i < nargs; i++)
|
|
|
3887 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
3888
|
|
|
3889 return Qnil;
|
|
|
3890 }
|
|
|
3891
|
|
|
3892 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
3893 Run HOOK with the specified arguments ARGS.
|
|
|
3894 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3895 value, that value may be a function or a list of functions to be
|
|
|
3896 called to run the hook. If the value is a function, it is called with
|
|
|
3897 the given arguments and its return value is returned. If it is a list
|
|
|
3898 of functions, those functions are called, in order,
|
|
|
3899 with the given arguments ARGS.
|
|
|
3900 It is best not to depend on the value return by `run-hook-with-args',
|
|
|
3901 as that may change.
|
|
|
3902
|
|
|
3903 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3904 not `make-local-variable'.
|
|
|
3905 */
|
|
|
3906 (int nargs, Lisp_Object *args))
|
|
|
3907 {
|
|
|
3908 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3909 }
|
|
|
3910
|
|
|
3911 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
3912 Run HOOK with the specified arguments ARGS.
|
|
|
3913 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3914 be a list of functions. We call those functions, one by one,
|
|
|
3915 passing arguments ARGS to each of them, until one of them
|
|
|
3916 returns a non-nil value. Then we return that value.
|
|
|
3917 If all the functions return nil, we return nil.
|
|
|
3918
|
|
|
3919 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3920 not `make-local-variable'.
|
|
|
3921 */
|
|
|
3922 (int nargs, Lisp_Object *args))
|
|
|
3923 {
|
|
|
3924 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3925 }
|
|
|
3926
|
|
|
3927 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
3928 Run HOOK with the specified arguments ARGS.
|
|
|
3929 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3930 be a list of functions. We call those functions, one by one,
|
|
|
3931 passing arguments ARGS to each of them, until one of them
|
|
|
3932 returns nil. Then we return nil.
|
|
|
3933 If all the functions return non-nil, we return non-nil.
|
|
|
3934
|
|
|
3935 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3936 not `make-local-variable'.
|
|
|
3937 */
|
|
|
3938 (int nargs, Lisp_Object *args))
|
|
|
3939 {
|
|
|
3940 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3941 }
|
|
|
3942
|
|
|
3943 /* ARGS[0] should be a hook symbol.
|
|
|
3944 Call each of the functions in the hook value, passing each of them
|
|
|
3945 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3946 COND specifies a condition to test after each call
|
|
|
3947 to decide whether to stop.
|
|
|
3948 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3949 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3950
|
|
|
3951 Lisp_Object
|
|
|
3952 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3953 enum run_hooks_condition cond)
|
|
|
3954 {
|
|
|
3955 Lisp_Object sym, val, ret;
|
|
|
3956
|
|
|
3957 if (!initialized || preparing_for_armageddon)
|
|
|
3958 /* We need to bail out of here pronto. */
|
|
|
3959 return Qnil;
|
|
|
3960
|
|
|
3961 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3962 will also be true unless something is really hosed. */
|
|
|
3963 assert (!gc_in_progress);
|
|
|
3964
|
|
|
3965 sym = args[0];
|
|
|
3966 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3967 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3968
|
|
|
3969 if (UNBOUNDP (val) || NILP (val))
|
|
|
3970 return ret;
|
|
|
3971 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3972 {
|
|
|
3973 args[0] = val;
|
|
|
3974 return Ffuncall (nargs, args);
|
|
|
3975 }
|
|
|
3976 else
|
|
|
3977 {
|
|
|
3978 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3979 Lisp_Object globals = Qnil;
|
|
|
3980 GCPRO3 (sym, val, globals);
|
|
|
3981
|
|
|
3982 for (;
|
|
|
3983 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3984 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3985 : !NILP (ret)));
|
|
|
3986 val = XCDR (val))
|
|
|
3987 {
|
|
|
3988 if (EQ (XCAR (val), Qt))
|
|
|
3989 {
|
|
|
3990 /* t indicates this hook has a local binding;
|
|
|
3991 it means to run the global binding too. */
|
|
|
3992 globals = Fdefault_value (sym);
|
|
|
3993
|
|
|
3994 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3995 ! NILP (globals))
|
|
|
3996 {
|
|
|
3997 args[0] = globals;
|
|
|
3998 ret = Ffuncall (nargs, args);
|
|
|
3999 }
|
|
|
4000 else
|
|
|
4001 {
|
|
|
4002 for (;
|
|
|
4003 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
4004 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
4005 ? NILP (ret)
|
|
|
4006 : !NILP (ret)));
|
|
|
4007 globals = XCDR (globals))
|
|
|
4008 {
|
|
|
4009 args[0] = XCAR (globals);
|
|
|
4010 /* In a global value, t should not occur. If it does, we
|
|
|
4011 must ignore it to avoid an endless loop. */
|
|
|
4012 if (!EQ (args[0], Qt))
|
|
|
4013 ret = Ffuncall (nargs, args);
|
|
|
4014 }
|
|
|
4015 }
|
|
|
4016 }
|
|
|
4017 else
|
|
|
4018 {
|
|
|
4019 args[0] = XCAR (val);
|
|
|
4020 ret = Ffuncall (nargs, args);
|
|
|
4021 }
|
|
|
4022 }
|
|
|
4023
|
|
|
4024 UNGCPRO;
|
|
|
4025 return ret;
|
|
|
4026 }
|
|
|
4027 }
|
|
|
4028
|
|
|
4029 Lisp_Object
|
|
|
4030 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
4031 enum run_hooks_condition cond)
|
|
|
4032 {
|
|
|
4033 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
4034 }
|
|
|
4035
|
|
|
4036 #if 0
|
|
|
4037
|
|
|
4038 /* From FSF 19.30, not currently used */
|
|
|
4039
|
|
|
4040 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
4041 present value of that symbol.
|
|
|
4042 Call each element of FUNLIST,
|
|
|
4043 passing each of them the rest of ARGS.
|
|
|
4044 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
4045 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
4046
|
|
|
4047 Lisp_Object
|
|
|
4048 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
4049 {
|
|
|
4050 Lisp_Object sym = args[0];
|
|
|
4051 Lisp_Object val;
|
|
|
4052 struct gcpro gcpro1, gcpro2;
|
|
|
4053
|
|
|
4054 GCPRO2 (sym, val);
|
|
|
4055
|
|
|
4056 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
4057 {
|
|
|
4058 if (EQ (XCAR (val), Qt))
|
|
|
4059 {
|
|
|
4060 /* t indicates this hook has a local binding;
|
|
|
4061 it means to run the global binding too. */
|
|
|
4062 Lisp_Object globals;
|
|
|
4063
|
|
|
4064 for (globals = Fdefault_value (sym);
|
|
|
4065 CONSP (globals);
|
|
|
4066 globals = XCDR (globals))
|
|
|
4067 {
|
|
|
4068 args[0] = XCAR (globals);
|
|
|
4069 /* In a global value, t should not occur. If it does, we
|
|
|
4070 must ignore it to avoid an endless loop. */
|
|
|
4071 if (!EQ (args[0], Qt))
|
|
|
4072 Ffuncall (nargs, args);
|
|
|
4073 }
|
|
|
4074 }
|
|
|
4075 else
|
|
|
4076 {
|
|
|
4077 args[0] = XCAR (val);
|
|
|
4078 Ffuncall (nargs, args);
|
|
|
4079 }
|
|
|
4080 }
|
|
|
4081 UNGCPRO;
|
|
|
4082 return Qnil;
|
|
|
4083 }
|
|
|
4084
|
|
|
4085 #endif /* 0 */
|
|
|
4086
|
|
|
4087 void
|
|
|
4088 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
4089 {
|
|
|
4090 /* This function can GC */
|
|
|
4091 struct gcpro gcpro1;
|
|
|
4092 int i;
|
|
|
4093 va_list vargs;
|
|
|
4094 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4095
|
|
|
4096 va_start (vargs, nargs);
|
|
|
4097 funcall_args[0] = hook_var;
|
|
|
4098 for (i = 0; i < nargs; i++)
|
|
|
4099 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4100 va_end (vargs);
|
|
|
4101
|
|
|
4102 GCPRO1 (*funcall_args);
|
|
|
4103 gcpro1.nvars = nargs + 1;
|
|
|
4104 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4105 UNGCPRO;
|
|
|
4106 }
|
|
|
4107
|
|
|
4108 void
|
|
|
4109 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
4110 int nargs, ...)
|
|
|
4111 {
|
|
|
4112 /* This function can GC */
|
|
|
4113 struct gcpro gcpro1;
|
|
|
4114 int i;
|
|
|
4115 va_list vargs;
|
|
|
4116 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4117
|
|
|
4118 va_start (vargs, nargs);
|
|
|
4119 funcall_args[0] = hook_var;
|
|
|
4120 for (i = 0; i < nargs; i++)
|
|
|
4121 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4122 va_end (vargs);
|
|
|
4123
|
|
|
4124 GCPRO1 (*funcall_args);
|
|
|
4125 gcpro1.nvars = nargs + 1;
|
|
|
4126 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
4127 RUN_HOOKS_TO_COMPLETION);
|
|
|
4128 UNGCPRO;
|
|
|
4129 }
|
|
|
4130
|
|
|
4131 Lisp_Object
|
|
|
4132 run_hook (Lisp_Object hook)
|
|
|
4133 {
|
|
|
4134 Frun_hooks (1, &hook);
|
|
|
4135 return Qnil;
|
|
|
4136 }
|
|
|
4137
|
|
|
4138
|
|
|
4139 /************************************************************************/
|
|
|
4140 /* Front-ends to eval, funcall, apply */
|
|
|
4141 /************************************************************************/
|
|
|
4142
|
|
|
4143 /* Apply fn to arg */
|
|
|
4144 Lisp_Object
|
|
|
4145 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
4146 {
|
|
|
4147 /* This function can GC */
|
|
|
4148 struct gcpro gcpro1;
|
|
|
4149 Lisp_Object args[2];
|
|
|
4150
|
|
|
4151 if (NILP (arg))
|
|
|
4152 return Ffuncall (1, &fn);
|
|
|
4153 GCPRO1 (args[0]);
|
|
|
4154 gcpro1.nvars = 2;
|
|
|
4155 args[0] = fn;
|
|
|
4156 args[1] = arg;
|
|
|
4157 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
4158 }
|
|
|
4159
|
|
|
4160 /* Call function fn on no arguments */
|
|
|
4161 Lisp_Object
|
|
|
4162 call0 (Lisp_Object fn)
|
|
|
4163 {
|
|
|
4164 /* This function can GC */
|
|
|
4165 struct gcpro gcpro1;
|
|
|
4166
|
|
|
4167 GCPRO1 (fn);
|
|
|
4168 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
4169 }
|
|
|
4170
|
|
|
4171 /* Call function fn with argument arg0 */
|
|
|
4172 Lisp_Object
|
|
|
4173 call1 (Lisp_Object fn,
|
|
|
4174 Lisp_Object arg0)
|
|
|
4175 {
|
|
|
4176 /* This function can GC */
|
|
|
4177 struct gcpro gcpro1;
|
|
|
4178 Lisp_Object args[2];
|
|
|
4179 args[0] = fn;
|
|
|
4180 args[1] = arg0;
|
|
|
4181 GCPRO1 (args[0]);
|
|
|
4182 gcpro1.nvars = 2;
|
|
|
4183 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
4184 }
|
|
|
4185
|
|
|
4186 /* Call function fn with arguments arg0, arg1 */
|
|
|
4187 Lisp_Object
|
|
|
4188 call2 (Lisp_Object fn,
|
|
|
4189 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4190 {
|
|
|
4191 /* This function can GC */
|
|
|
4192 struct gcpro gcpro1;
|
|
|
4193 Lisp_Object args[3];
|
|
|
4194 args[0] = fn;
|
|
|
4195 args[1] = arg0;
|
|
|
4196 args[2] = arg1;
|
|
|
4197 GCPRO1 (args[0]);
|
|
|
4198 gcpro1.nvars = 3;
|
|
|
4199 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4200 }
|
|
|
4201
|
|
|
4202 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4203 Lisp_Object
|
|
|
4204 call3 (Lisp_Object fn,
|
|
|
4205 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4206 {
|
|
|
4207 /* This function can GC */
|
|
|
4208 struct gcpro gcpro1;
|
|
|
4209 Lisp_Object args[4];
|
|
|
4210 args[0] = fn;
|
|
|
4211 args[1] = arg0;
|
|
|
4212 args[2] = arg1;
|
|
|
4213 args[3] = arg2;
|
|
|
4214 GCPRO1 (args[0]);
|
|
|
4215 gcpro1.nvars = 4;
|
|
|
4216 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4217 }
|
|
|
4218
|
|
|
4219 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4220 Lisp_Object
|
|
|
4221 call4 (Lisp_Object fn,
|
|
|
4222 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4223 Lisp_Object arg3)
|
|
|
4224 {
|
|
|
4225 /* This function can GC */
|
|
|
4226 struct gcpro gcpro1;
|
|
|
4227 Lisp_Object args[5];
|
|
|
4228 args[0] = fn;
|
|
|
4229 args[1] = arg0;
|
|
|
4230 args[2] = arg1;
|
|
|
4231 args[3] = arg2;
|
|
|
4232 args[4] = arg3;
|
|
|
4233 GCPRO1 (args[0]);
|
|
|
4234 gcpro1.nvars = 5;
|
|
|
4235 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4236 }
|
|
|
4237
|
|
|
4238 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4239 Lisp_Object
|
|
|
4240 call5 (Lisp_Object fn,
|
|
|
4241 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4242 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4243 {
|
|
|
4244 /* This function can GC */
|
|
|
4245 struct gcpro gcpro1;
|
|
|
4246 Lisp_Object args[6];
|
|
|
4247 args[0] = fn;
|
|
|
4248 args[1] = arg0;
|
|
|
4249 args[2] = arg1;
|
|
|
4250 args[3] = arg2;
|
|
|
4251 args[4] = arg3;
|
|
|
4252 args[5] = arg4;
|
|
|
4253 GCPRO1 (args[0]);
|
|
|
4254 gcpro1.nvars = 6;
|
|
|
4255 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4256 }
|
|
|
4257
|
|
|
4258 Lisp_Object
|
|
|
4259 call6 (Lisp_Object fn,
|
|
|
4260 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4261 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4262 {
|
|
|
4263 /* This function can GC */
|
|
|
4264 struct gcpro gcpro1;
|
|
|
4265 Lisp_Object args[7];
|
|
|
4266 args[0] = fn;
|
|
|
4267 args[1] = arg0;
|
|
|
4268 args[2] = arg1;
|
|
|
4269 args[3] = arg2;
|
|
|
4270 args[4] = arg3;
|
|
|
4271 args[5] = arg4;
|
|
|
4272 args[6] = arg5;
|
|
|
4273 GCPRO1 (args[0]);
|
|
|
4274 gcpro1.nvars = 7;
|
|
|
4275 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4276 }
|
|
|
4277
|
|
|
4278 Lisp_Object
|
|
|
4279 call7 (Lisp_Object fn,
|
|
|
4280 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4281 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4282 Lisp_Object arg6)
|
|
|
4283 {
|
|
|
4284 /* This function can GC */
|
|
|
4285 struct gcpro gcpro1;
|
|
|
4286 Lisp_Object args[8];
|
|
|
4287 args[0] = fn;
|
|
|
4288 args[1] = arg0;
|
|
|
4289 args[2] = arg1;
|
|
|
4290 args[3] = arg2;
|
|
|
4291 args[4] = arg3;
|
|
|
4292 args[5] = arg4;
|
|
|
4293 args[6] = arg5;
|
|
|
4294 args[7] = arg6;
|
|
|
4295 GCPRO1 (args[0]);
|
|
|
4296 gcpro1.nvars = 8;
|
|
|
4297 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4298 }
|
|
|
4299
|
|
|
4300 Lisp_Object
|
|
|
4301 call8 (Lisp_Object fn,
|
|
|
4302 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4303 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4304 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4305 {
|
|
|
4306 /* This function can GC */
|
|
|
4307 struct gcpro gcpro1;
|
|
|
4308 Lisp_Object args[9];
|
|
|
4309 args[0] = fn;
|
|
|
4310 args[1] = arg0;
|
|
|
4311 args[2] = arg1;
|
|
|
4312 args[3] = arg2;
|
|
|
4313 args[4] = arg3;
|
|
|
4314 args[5] = arg4;
|
|
|
4315 args[6] = arg5;
|
|
|
4316 args[7] = arg6;
|
|
|
4317 args[8] = arg7;
|
|
|
4318 GCPRO1 (args[0]);
|
|
|
4319 gcpro1.nvars = 9;
|
|
|
4320 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4321 }
|
|
|
4322
|
|
|
4323 Lisp_Object
|
|
|
4324 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4325 {
|
|
|
4326 if (current_buffer == buf)
|
|
|
4327 return call0 (fn);
|
|
|
4328 else
|
|
|
4329 {
|
|
|
4330 Lisp_Object val;
|
|
|
4331 int speccount = specpdl_depth();
|
|
|
4332 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4333 set_buffer_internal (buf);
|
|
|
4334 val = call0 (fn);
|
|
|
4335 unbind_to (speccount, Qnil);
|
|
|
4336 return val;
|
|
|
4337 }
|
|
|
4338 }
|
|
|
4339
|
|
|
4340 Lisp_Object
|
|
|
4341 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4342 Lisp_Object arg0)
|
|
|
4343 {
|
|
|
4344 if (current_buffer == buf)
|
|
|
4345 return call1 (fn, arg0);
|
|
|
4346 else
|
|
|
4347 {
|
|
|
4348 Lisp_Object val;
|
|
|
4349 int speccount = specpdl_depth();
|
|
|
4350 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4351 set_buffer_internal (buf);
|
|
|
4352 val = call1 (fn, arg0);
|
|
|
4353 unbind_to (speccount, Qnil);
|
|
|
4354 return val;
|
|
|
4355 }
|
|
|
4356 }
|
|
|
4357
|
|
|
4358 Lisp_Object
|
|
|
4359 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4360 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4361 {
|
|
|
4362 if (current_buffer == buf)
|
|
|
4363 return call2 (fn, arg0, arg1);
|
|
|
4364 else
|
|
|
4365 {
|
|
|
4366 Lisp_Object val;
|
|
|
4367 int speccount = specpdl_depth();
|
|
|
4368 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4369 set_buffer_internal (buf);
|
|
|
4370 val = call2 (fn, arg0, arg1);
|
|
|
4371 unbind_to (speccount, Qnil);
|
|
|
4372 return val;
|
|
|
4373 }
|
|
|
4374 }
|
|
|
4375
|
|
|
4376 Lisp_Object
|
|
|
4377 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4378 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4379 {
|
|
|
4380 if (current_buffer == buf)
|
|
|
4381 return call3 (fn, arg0, arg1, arg2);
|
|
|
4382 else
|
|
|
4383 {
|
|
|
4384 Lisp_Object val;
|
|
|
4385 int speccount = specpdl_depth();
|
|
|
4386 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4387 set_buffer_internal (buf);
|
|
|
4388 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4389 unbind_to (speccount, Qnil);
|
|
|
4390 return val;
|
|
|
4391 }
|
|
|
4392 }
|
|
|
4393
|
|
|
4394 Lisp_Object
|
|
|
4395 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4396 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4397 Lisp_Object arg3)
|
|
|
4398 {
|
|
|
4399 if (current_buffer == buf)
|
|
|
4400 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4401 else
|
|
|
4402 {
|
|
|
4403 Lisp_Object val;
|
|
|
4404 int speccount = specpdl_depth();
|
|
|
4405 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4406 set_buffer_internal (buf);
|
|
|
4407 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4408 unbind_to (speccount, Qnil);
|
|
|
4409 return val;
|
|
|
4410 }
|
|
|
4411 }
|
|
|
4412
|
|
|
4413 Lisp_Object
|
|
|
4414 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4415 {
|
|
|
4416 if (current_buffer == buf)
|
|
|
4417 return Feval (form);
|
|
|
4418 else
|
|
|
4419 {
|
|
|
4420 Lisp_Object val;
|
|
|
4421 int speccount = specpdl_depth();
|
|
|
4422 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4423 set_buffer_internal (buf);
|
|
|
4424 val = Feval (form);
|
|
|
4425 unbind_to (speccount, Qnil);
|
|
|
4426 return val;
|
|
|
4427 }
|
|
|
4428 }
|
|
|
4429
|
|
|
4430
|
|
|
4431 /************************************************************************/
|
|
|
4432 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4433 /************************************************************************/
|
|
|
4434
|
|
|
4435 /* Call function fn on no arguments, with condition handler */
|
|
|
4436 Lisp_Object
|
|
|
4437 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4438 {
|
|
|
4439 /* This function can GC */
|
|
|
4440 struct gcpro gcpro1;
|
|
|
4441 Lisp_Object args[2];
|
|
|
4442 args[0] = handler;
|
|
|
4443 args[1] = fn;
|
|
|
4444 GCPRO1 (args[0]);
|
|
|
4445 gcpro1.nvars = 2;
|
|
|
4446 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4447 }
|
|
|
4448
|
|
|
4449 /* Call function fn with argument arg0, with condition handler */
|
|
|
4450 Lisp_Object
|
|
|
4451 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4452 Lisp_Object arg0)
|
|
|
4453 {
|
|
|
4454 /* This function can GC */
|
|
|
4455 struct gcpro gcpro1;
|
|
|
4456 Lisp_Object args[3];
|
|
|
4457 args[0] = handler;
|
|
|
4458 args[1] = fn;
|
|
|
4459 args[2] = arg0;
|
|
|
4460 GCPRO1 (args[0]);
|
|
|
4461 gcpro1.nvars = 3;
|
|
|
4462 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4463 }
|
|
|
4464
|
|
|
4465
|
|
|
4466 /* The following functions provide you with error-trapping versions
|
|
|
4467 of the various front-ends above. They take an additional
|
|
|
4468 "warning_string" argument; if non-zero, a warning with this
|
|
|
4469 string and the actual error that occurred will be displayed
|
|
|
4470 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4471 QUIT is inhibited while these functions are running, and if
|
|
|
4472 an error occurs, Qunbound is returned instead of the normal
|
|
|
4473 return value.
|
|
|
4474 */
|
|
|
4475
|
|
|
4476 /* #### This stuff needs to catch throws as well. We need to
|
|
|
4477 improve internal_catch() so it can take a "catch anything"
|
|
|
4478 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4479
|
|
|
4480 static Lisp_Object
|
|
|
4481 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4482 {
|
|
|
4483 if (!NILP (errordata))
|
|
|
4484 {
|
|
|
4485 Lisp_Object args[2];
|
|
|
4486
|
|
|
4487 if (!NILP (arg))
|
|
|
4488 {
|
|
|
4489 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4490 args[0] = build_string (str);
|
|
|
4491 }
|
|
|
4492 else
|
|
|
4493 args[0] = build_string ("error");
|
|
|
4494 /* #### This should call
|
|
|
4495 (with-output-to-string (display-error errordata))
|
|
|
4496 but that stuff is all in Lisp currently. */
|
|
|
4497 args[1] = errordata;
|
|
|
4498 warn_when_safe_lispobj
|
|
|
4499 (Qerror, Qwarning,
|
|
442
|
4500 emacs_doprnt_string_lisp ((const Bufbyte *) "%s: %s",
|
|
428
|
4501 Qnil, -1, 2, args));
|
|
|
4502 }
|
|
|
4503 return Qunbound;
|
|
|
4504 }
|
|
|
4505
|
|
|
4506 static Lisp_Object
|
|
|
4507 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4508 {
|
|
|
4509 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4510 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4511 return caught_a_squirmer (errordata, arg);
|
|
|
4512 }
|
|
|
4513
|
|
|
4514 static Lisp_Object
|
|
|
4515 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4516 {
|
|
|
4517 Lisp_Object hook = Fcar (arg);
|
|
|
4518 arg = Fcdr (arg);
|
|
|
4519 /* Clear out the hook. */
|
|
|
4520 Fset (hook, Qnil);
|
|
|
4521 return caught_a_squirmer (errordata, arg);
|
|
|
4522 }
|
|
|
4523
|
|
|
4524 static Lisp_Object
|
|
|
4525 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4526 Lisp_Object arg)
|
|
|
4527 {
|
|
|
4528 Lisp_Object hook = Fcar (arg);
|
|
|
4529 arg = Fcdr (arg);
|
|
|
4530 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4531 /* Clear out the hook. */
|
|
|
4532 Fset (hook, Qnil);
|
|
|
4533 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4534 }
|
|
|
4535
|
|
|
4536 static Lisp_Object
|
|
|
4537 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4538 {
|
|
|
4539 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4540 }
|
|
|
4541
|
|
|
4542 Lisp_Object
|
|
442
|
4543 eval_in_buffer_trapping_errors (const char *warning_string,
|
|
428
|
4544 struct buffer *buf, Lisp_Object form)
|
|
|
4545 {
|
|
|
4546 int speccount = specpdl_depth();
|
|
|
4547 Lisp_Object tem;
|
|
|
4548 Lisp_Object buffer;
|
|
|
4549 Lisp_Object cons;
|
|
|
4550 Lisp_Object opaque;
|
|
|
4551 struct gcpro gcpro1, gcpro2;
|
|
|
4552
|
|
|
4553 XSETBUFFER (buffer, buf);
|
|
|
4554
|
|
|
4555 specbind (Qinhibit_quit, Qt);
|
|
|
4556 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4557
|
|
|
4558 cons = noseeum_cons (buffer, form);
|
|
|
4559 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4560 GCPRO2 (cons, opaque);
|
|
|
4561 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4562 tem = condition_case_1 (Qerror,
|
|
|
4563 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4564 caught_a_squirmer, opaque);
|
|
|
4565 free_cons (XCONS (cons));
|
|
|
4566 if (OPAQUE_PTRP (opaque))
|
|
|
4567 free_opaque_ptr (opaque);
|
|
|
4568 UNGCPRO;
|
|
|
4569
|
|
|
4570 /* gc_currently_forbidden = 0; */
|
|
|
4571 return unbind_to (speccount, tem);
|
|
|
4572 }
|
|
|
4573
|
|
|
4574 static Lisp_Object
|
|
|
4575 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4576 {
|
|
|
4577 /* This function can GC */
|
|
|
4578 run_hook (hook_symbol);
|
|
|
4579 return Qnil;
|
|
|
4580 }
|
|
|
4581
|
|
|
4582 Lisp_Object
|
|
442
|
4583 run_hook_trapping_errors (const char *warning_string, Lisp_Object hook_symbol)
|
|
428
|
4584 {
|
|
|
4585 int speccount;
|
|
|
4586 Lisp_Object tem;
|
|
|
4587 Lisp_Object opaque;
|
|
|
4588 struct gcpro gcpro1;
|
|
|
4589
|
|
|
4590 if (!initialized || preparing_for_armageddon)
|
|
|
4591 return Qnil;
|
|
|
4592 tem = find_symbol_value (hook_symbol);
|
|
|
4593 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4594 return Qnil;
|
|
|
4595
|
|
|
4596 speccount = specpdl_depth();
|
|
|
4597 specbind (Qinhibit_quit, Qt);
|
|
|
4598
|
|
|
4599 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4600 GCPRO1 (opaque);
|
|
|
4601 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4602 tem = condition_case_1 (Qerror,
|
|
|
4603 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4604 caught_a_squirmer, opaque);
|
|
|
4605 if (OPAQUE_PTRP (opaque))
|
|
|
4606 free_opaque_ptr (opaque);
|
|
|
4607 UNGCPRO;
|
|
|
4608
|
|
|
4609 return unbind_to (speccount, tem);
|
|
|
4610 }
|
|
|
4611
|
|
|
4612 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4613 if an error occurs. */
|
|
|
4614
|
|
|
4615 Lisp_Object
|
|
442
|
4616 safe_run_hook_trapping_errors (const char *warning_string,
|
|
428
|
4617 Lisp_Object hook_symbol,
|
|
|
4618 int allow_quit)
|
|
|
4619 {
|
|
|
4620 int speccount = specpdl_depth();
|
|
|
4621 Lisp_Object tem;
|
|
|
4622 Lisp_Object cons = Qnil;
|
|
|
4623 struct gcpro gcpro1;
|
|
|
4624
|
|
|
4625 if (!initialized || preparing_for_armageddon)
|
|
|
4626 return Qnil;
|
|
|
4627 tem = find_symbol_value (hook_symbol);
|
|
|
4628 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4629 return Qnil;
|
|
|
4630
|
|
|
4631 if (!allow_quit)
|
|
|
4632 specbind (Qinhibit_quit, Qt);
|
|
|
4633
|
|
|
4634 cons = noseeum_cons (hook_symbol,
|
|
|
4635 warning_string ? make_opaque_ptr ((void *)warning_string)
|
|
|
4636 : Qnil);
|
|
|
4637 GCPRO1 (cons);
|
|
|
4638 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4639 tem = condition_case_1 (Qerror,
|
|
|
4640 catch_them_squirmers_run_hook,
|
|
|
4641 hook_symbol,
|
|
|
4642 allow_quit ?
|
|
|
4643 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4644 safe_run_hook_caught_a_squirmer,
|
|
|
4645 cons);
|
|
|
4646 if (OPAQUE_PTRP (XCDR (cons)))
|
|
|
4647 free_opaque_ptr (XCDR (cons));
|
|
|
4648 free_cons (XCONS (cons));
|
|
|
4649 UNGCPRO;
|
|
|
4650
|
|
|
4651 return unbind_to (speccount, tem);
|
|
|
4652 }
|
|
|
4653
|
|
|
4654 static Lisp_Object
|
|
|
4655 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4656 {
|
|
|
4657 /* This function can GC */
|
|
|
4658 return call0 (function);
|
|
|
4659 }
|
|
|
4660
|
|
|
4661 Lisp_Object
|
|
442
|
4662 call0_trapping_errors (const char *warning_string, Lisp_Object function)
|
|
428
|
4663 {
|
|
|
4664 int speccount;
|
|
|
4665 Lisp_Object tem;
|
|
|
4666 Lisp_Object opaque = Qnil;
|
|
|
4667 struct gcpro gcpro1, gcpro2;
|
|
|
4668
|
|
|
4669 if (SYMBOLP (function))
|
|
|
4670 {
|
|
|
4671 tem = XSYMBOL (function)->function;
|
|
|
4672 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4673 return Qnil;
|
|
|
4674 }
|
|
|
4675
|
|
|
4676 GCPRO2 (opaque, function);
|
|
|
4677 speccount = specpdl_depth();
|
|
|
4678 specbind (Qinhibit_quit, Qt);
|
|
|
4679 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4680
|
|
|
4681 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4682 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4683 tem = condition_case_1 (Qerror,
|
|
|
4684 catch_them_squirmers_call0, function,
|
|
|
4685 caught_a_squirmer, opaque);
|
|
|
4686 if (OPAQUE_PTRP (opaque))
|
|
|
4687 free_opaque_ptr (opaque);
|
|
|
4688 UNGCPRO;
|
|
|
4689
|
|
|
4690 /* gc_currently_forbidden = 0; */
|
|
|
4691 return unbind_to (speccount, tem);
|
|
|
4692 }
|
|
|
4693
|
|
|
4694 static Lisp_Object
|
|
|
4695 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4696 {
|
|
|
4697 /* This function can GC */
|
|
|
4698 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4699 }
|
|
|
4700
|
|
|
4701 static Lisp_Object
|
|
|
4702 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4703 {
|
|
|
4704 /* This function can GC */
|
|
|
4705 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4706 }
|
|
|
4707
|
|
|
4708 Lisp_Object
|
|
442
|
4709 call1_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
428
|
4710 Lisp_Object object)
|
|
|
4711 {
|
|
|
4712 int speccount = specpdl_depth();
|
|
|
4713 Lisp_Object tem;
|
|
|
4714 Lisp_Object cons = Qnil;
|
|
|
4715 Lisp_Object opaque = Qnil;
|
|
|
4716 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4717
|
|
|
4718 if (SYMBOLP (function))
|
|
|
4719 {
|
|
|
4720 tem = XSYMBOL (function)->function;
|
|
|
4721 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4722 return Qnil;
|
|
|
4723 }
|
|
|
4724
|
|
|
4725 GCPRO4 (cons, opaque, function, object);
|
|
|
4726
|
|
|
4727 specbind (Qinhibit_quit, Qt);
|
|
|
4728 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4729
|
|
|
4730 cons = noseeum_cons (function, object);
|
|
|
4731 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4732 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4733 tem = condition_case_1 (Qerror,
|
|
|
4734 catch_them_squirmers_call1, cons,
|
|
|
4735 caught_a_squirmer, opaque);
|
|
|
4736 if (OPAQUE_PTRP (opaque))
|
|
|
4737 free_opaque_ptr (opaque);
|
|
|
4738 free_cons (XCONS (cons));
|
|
|
4739 UNGCPRO;
|
|
|
4740
|
|
|
4741 /* gc_currently_forbidden = 0; */
|
|
|
4742 return unbind_to (speccount, tem);
|
|
|
4743 }
|
|
|
4744
|
|
|
4745 Lisp_Object
|
|
442
|
4746 call2_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
428
|
4747 Lisp_Object object1, Lisp_Object object2)
|
|
|
4748 {
|
|
|
4749 int speccount = specpdl_depth();
|
|
|
4750 Lisp_Object tem;
|
|
|
4751 Lisp_Object cons = Qnil;
|
|
|
4752 Lisp_Object opaque = Qnil;
|
|
|
4753 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4754
|
|
|
4755 if (SYMBOLP (function))
|
|
|
4756 {
|
|
|
4757 tem = XSYMBOL (function)->function;
|
|
|
4758 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4759 return Qnil;
|
|
|
4760 }
|
|
|
4761
|
|
|
4762 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4763 specbind (Qinhibit_quit, Qt);
|
|
|
4764 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4765
|
|
|
4766 cons = list3 (function, object1, object2);
|
|
|
4767 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4768 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4769 tem = condition_case_1 (Qerror,
|
|
|
4770 catch_them_squirmers_call2, cons,
|
|
|
4771 caught_a_squirmer, opaque);
|
|
|
4772 if (OPAQUE_PTRP (opaque))
|
|
|
4773 free_opaque_ptr (opaque);
|
|
|
4774 free_list (cons);
|
|
|
4775 UNGCPRO;
|
|
|
4776
|
|
|
4777 /* gc_currently_forbidden = 0; */
|
|
|
4778 return unbind_to (speccount, tem);
|
|
|
4779 }
|
|
|
4780
|
|
|
4781
|
|
|
4782 /************************************************************************/
|
|
|
4783 /* The special binding stack */
|
|
|
4784 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4785 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4786 /************************************************************************/
|
|
|
4787
|
|
|
4788 #define min_max_specpdl_size 400
|
|
|
4789
|
|
|
4790 void
|
|
|
4791 grow_specpdl (size_t reserved)
|
|
|
4792 {
|
|
|
4793 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4794 if (size_needed >= max_specpdl_size)
|
|
|
4795 {
|
|
|
4796 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4797 max_specpdl_size = min_max_specpdl_size;
|
|
|
4798 if (size_needed >= max_specpdl_size)
|
|
|
4799 {
|
|
|
4800 if (!NILP (Vdebug_on_error) ||
|
|
|
4801 !NILP (Vdebug_on_signal))
|
|
|
4802 /* Leave room for some specpdl in the debugger. */
|
|
|
4803 max_specpdl_size = size_needed + 100;
|
|
|
4804 continuable_error
|
|
|
4805 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4806 }
|
|
|
4807 }
|
|
|
4808 while (specpdl_size < size_needed)
|
|
|
4809 {
|
|
|
4810 specpdl_size *= 2;
|
|
|
4811 if (specpdl_size > max_specpdl_size)
|
|
|
4812 specpdl_size = max_specpdl_size;
|
|
|
4813 }
|
|
|
4814 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
4815 specpdl_ptr = specpdl + specpdl_depth();
|
|
|
4816 }
|
|
|
4817
|
|
|
4818
|
|
|
4819 /* Handle unbinding buffer-local variables */
|
|
|
4820 static Lisp_Object
|
|
|
4821 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4822 {
|
|
|
4823 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4824 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
440
|
4825 Lisp_Cons *victim = XCONS (ovalue);
|
|
428
|
4826 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4827 ovalue = victim->cdr;
|
|
|
4828
|
|
|
4829 free_cons (victim);
|
|
|
4830
|
|
|
4831 if (NILP (buf))
|
|
|
4832 {
|
|
|
4833 /* Deleted buffer -- do nothing */
|
|
|
4834 }
|
|
|
4835 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4836 {
|
|
|
4837 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4838 * (kill-local-variable can do this.)
|
|
|
4839 * Do nothing in this case.
|
|
|
4840 */
|
|
|
4841 }
|
|
|
4842 else if (EQ (buf, current))
|
|
|
4843 Fset (symbol, ovalue);
|
|
|
4844 else
|
|
|
4845 {
|
|
|
4846 /* Urk! Somebody switched buffers */
|
|
|
4847 struct gcpro gcpro1;
|
|
|
4848 GCPRO1 (current);
|
|
|
4849 Fset_buffer (buf);
|
|
|
4850 Fset (symbol, ovalue);
|
|
|
4851 Fset_buffer (current);
|
|
|
4852 UNGCPRO;
|
|
|
4853 }
|
|
|
4854 return symbol;
|
|
|
4855 }
|
|
|
4856
|
|
|
4857 static Lisp_Object
|
|
|
4858 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4859 {
|
|
|
4860 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4861 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4862
|
|
|
4863 buffer = get_buffer (buffer, 0);
|
|
|
4864 if (NILP (buffer))
|
|
|
4865 {
|
|
|
4866 /* Deleted buffer -- do nothing */
|
|
|
4867 }
|
|
|
4868 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4869 {
|
|
|
4870 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4871 * (kill-local-variable can do this.)
|
|
|
4872 * Do nothing in this case.
|
|
|
4873 */
|
|
|
4874 }
|
|
|
4875 else if (EQ (buffer, current))
|
|
|
4876 Fkill_local_variable (symbol);
|
|
|
4877 else
|
|
|
4878 {
|
|
|
4879 /* Urk! Somebody switched buffers */
|
|
|
4880 struct gcpro gcpro1;
|
|
|
4881 GCPRO1 (current);
|
|
|
4882 Fset_buffer (buffer);
|
|
|
4883 Fkill_local_variable (symbol);
|
|
|
4884 Fset_buffer (current);
|
|
|
4885 UNGCPRO;
|
|
|
4886 }
|
|
|
4887 return symbol;
|
|
|
4888 }
|
|
|
4889
|
|
|
4890
|
|
|
4891 void
|
|
|
4892 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4893 {
|
|
|
4894 SPECBIND (symbol, value);
|
|
|
4895 }
|
|
|
4896
|
|
|
4897 void
|
|
|
4898 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4899 {
|
|
|
4900 int buffer_local =
|
|
|
4901 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4902
|
|
|
4903 if (buffer_local == 0)
|
|
|
4904 {
|
|
|
4905 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4906 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4907 }
|
|
|
4908 else if (buffer_local > 0)
|
|
|
4909 {
|
|
|
4910 /* Already buffer-local */
|
|
|
4911 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4912 find_symbol_value (symbol));
|
|
|
4913 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4914 }
|
|
|
4915 else
|
|
|
4916 {
|
|
|
4917 /* About to become buffer-local */
|
|
|
4918 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4919 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4920 }
|
|
|
4921
|
|
|
4922 specpdl_ptr->symbol = symbol;
|
|
|
4923 specpdl_ptr++;
|
|
|
4924 specpdl_depth_counter++;
|
|
|
4925
|
|
|
4926 Fset (symbol, value);
|
|
|
4927 }
|
|
|
4928
|
|
|
4929 void
|
|
|
4930 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4931 Lisp_Object arg)
|
|
|
4932 {
|
|
|
4933 SPECPDL_RESERVE (1);
|
|
|
4934 specpdl_ptr->func = function;
|
|
|
4935 specpdl_ptr->symbol = Qnil;
|
|
|
4936 specpdl_ptr->old_value = arg;
|
|
|
4937 specpdl_ptr++;
|
|
|
4938 specpdl_depth_counter++;
|
|
|
4939 }
|
|
|
4940
|
|
|
4941 extern int check_sigio (void);
|
|
|
4942
|
|
|
4943 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4944 VALUE is not used, except that, purely as a convenience to the
|
|
|
4945 caller, it is protected from garbage-protection. */
|
|
|
4946 Lisp_Object
|
|
|
4947 unbind_to (int count, Lisp_Object value)
|
|
|
4948 {
|
|
|
4949 UNBIND_TO_GCPRO (count, value);
|
|
|
4950 return value;
|
|
|
4951 }
|
|
|
4952
|
|
|
4953 /* Don't call this directly.
|
|
|
4954 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4955 void
|
|
|
4956 unbind_to_hairy (int count)
|
|
|
4957 {
|
|
|
4958 int quitf;
|
|
|
4959
|
|
442
|
4960 ++specpdl_ptr;
|
|
|
4961 ++specpdl_depth_counter;
|
|
|
4962
|
|
428
|
4963 check_quit (); /* make Vquit_flag accurate */
|
|
|
4964 quitf = !NILP (Vquit_flag);
|
|
|
4965 Vquit_flag = Qnil;
|
|
|
4966
|
|
|
4967 while (specpdl_depth_counter != count)
|
|
|
4968 {
|
|
|
4969 --specpdl_ptr;
|
|
|
4970 --specpdl_depth_counter;
|
|
|
4971
|
|
|
4972 if (specpdl_ptr->func != 0)
|
|
|
4973 /* An unwind-protect */
|
|
|
4974 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
4975 else
|
|
|
4976 {
|
|
|
4977 /* We checked symbol for validity when we specbound it,
|
|
|
4978 so only need to call Fset if symbol has magic value. */
|
|
440
|
4979 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
428
|
4980 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4981 sym->value = specpdl_ptr->old_value;
|
|
|
4982 else
|
|
|
4983 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4984 }
|
|
|
4985
|
|
|
4986 #if 0 /* martin */
|
|
|
4987 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4988 /* There should never be anything here for us to remove.
|
|
|
4989 If so, it indicates a logic error in Emacs. Catches
|
|
|
4990 should get removed when a throw or signal occurs, or
|
|
|
4991 when a catch or condition-case exits normally. But
|
|
|
4992 it's too dangerous to just remove this code. --ben */
|
|
|
4993
|
|
|
4994 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4995 Braino on mly's part? */
|
|
|
4996 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4997 that catch can't possibly still be valid. */
|
|
|
4998 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4999 {
|
|
|
5000 catchlist = catchlist->next;
|
|
|
5001 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
5002 }
|
|
|
5003 #endif
|
|
|
5004 #endif
|
|
|
5005 }
|
|
|
5006 if (quitf)
|
|
|
5007 Vquit_flag = Qt;
|
|
|
5008 }
|
|
|
5009
|
|
|
5010
|
|
|
5011
|
|
|
5012 /* Get the value of symbol's global binding, even if that binding is
|
|
|
5013 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
5014
|
|
|
5015 Lisp_Object
|
|
|
5016 top_level_value (Lisp_Object symbol)
|
|
|
5017 {
|
|
|
5018 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5019
|
|
|
5020 CHECK_SYMBOL (symbol);
|
|
|
5021 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5022 {
|
|
|
5023 if (EQ (ptr->symbol, symbol))
|
|
|
5024 return ptr->old_value;
|
|
|
5025 }
|
|
|
5026 return XSYMBOL (symbol)->value;
|
|
|
5027 }
|
|
|
5028
|
|
|
5029 #if 0
|
|
|
5030
|
|
|
5031 Lisp_Object
|
|
|
5032 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
5033 {
|
|
|
5034 REGISTER struct specbinding *ptr = specpdl;
|
|
|
5035
|
|
|
5036 CHECK_SYMBOL (symbol);
|
|
|
5037 for (; ptr != specpdl_ptr; ptr++)
|
|
|
5038 {
|
|
|
5039 if (EQ (ptr->symbol, symbol))
|
|
|
5040 {
|
|
|
5041 ptr->old_value = newval;
|
|
|
5042 return newval;
|
|
|
5043 }
|
|
|
5044 }
|
|
|
5045 return Fset (symbol, newval);
|
|
|
5046 }
|
|
|
5047
|
|
|
5048 #endif /* 0 */
|
|
|
5049
|
|
|
5050
|
|
|
5051 /************************************************************************/
|
|
|
5052 /* Backtraces */
|
|
|
5053 /************************************************************************/
|
|
|
5054
|
|
|
5055 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
5056 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
5057 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
5058 */
|
|
|
5059 (level, flag))
|
|
|
5060 {
|
|
|
5061 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5062 REGISTER int i;
|
|
|
5063
|
|
|
5064 CHECK_INT (level);
|
|
|
5065
|
|
|
5066 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
5067 {
|
|
|
5068 backlist = backlist->next;
|
|
|
5069 }
|
|
|
5070
|
|
|
5071 if (backlist)
|
|
|
5072 backlist->debug_on_exit = !NILP (flag);
|
|
|
5073
|
|
|
5074 return flag;
|
|
|
5075 }
|
|
|
5076
|
|
|
5077 static void
|
|
|
5078 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
5079 {
|
|
|
5080 int printing_bindings = 0;
|
|
|
5081
|
|
|
5082 for (; speccount > speclimit; speccount--)
|
|
|
5083 {
|
|
|
5084 if (specpdl[speccount - 1].func == 0
|
|
|
5085 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
5086 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
5087 {
|
|
|
5088 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
5089 stream);
|
|
|
5090 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
5091 printing_bindings = 1;
|
|
|
5092 }
|
|
|
5093 else
|
|
|
5094 {
|
|
|
5095 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
5096 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
5097 printing_bindings = 0;
|
|
|
5098 }
|
|
|
5099 }
|
|
|
5100 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
5101 }
|
|
|
5102
|
|
|
5103 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
5104 Print a trace of Lisp function calls currently active.
|
|
438
|
5105 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
428
|
5106 and defaults to the value of `standard-output'. Optional second arg
|
|
|
5107 DETAILED means show places where currently active variable bindings,
|
|
|
5108 catches, condition-cases, and unwind-protects were made as well as
|
|
|
5109 function calls.
|
|
|
5110 */
|
|
|
5111 (stream, detailed))
|
|
|
5112 {
|
|
|
5113 /* This function can GC */
|
|
|
5114 struct backtrace *backlist = backtrace_list;
|
|
|
5115 struct catchtag *catches = catchlist;
|
|
|
5116 int speccount = specpdl_depth();
|
|
|
5117
|
|
|
5118 int old_nl = print_escape_newlines;
|
|
|
5119 int old_pr = print_readably;
|
|
|
5120 Lisp_Object old_level = Vprint_level;
|
|
|
5121 Lisp_Object oiq = Vinhibit_quit;
|
|
|
5122 struct gcpro gcpro1, gcpro2;
|
|
|
5123
|
|
|
5124 /* We can't allow quits in here because that could cause the values
|
|
|
5125 of print_readably and print_escape_newlines to get screwed up.
|
|
|
5126 Normally we would use a record_unwind_protect but that would
|
|
|
5127 screw up the functioning of this function. */
|
|
|
5128 Vinhibit_quit = Qt;
|
|
|
5129
|
|
|
5130 entering_debugger = 0;
|
|
|
5131
|
|
|
5132 Vprint_level = make_int (3);
|
|
|
5133 print_readably = 0;
|
|
|
5134 print_escape_newlines = 1;
|
|
|
5135
|
|
|
5136 GCPRO2 (stream, old_level);
|
|
|
5137
|
|
|
5138 if (NILP (stream))
|
|
|
5139 stream = Vstandard_output;
|
|
|
5140 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
5141 stream = Fselected_frame (Qnil);
|
|
|
5142
|
|
|
5143 for (;;)
|
|
|
5144 {
|
|
|
5145 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
5146 {
|
|
|
5147 int catchpdl = catches->pdlcount;
|
|
438
|
5148 if (speccount > catchpdl
|
|
|
5149 && specpdl[catchpdl].func == condition_case_unwind)
|
|
428
|
5150 /* This is a condition-case catchpoint */
|
|
|
5151 catchpdl = catchpdl + 1;
|
|
|
5152
|
|
|
5153 backtrace_specials (speccount, catchpdl, stream);
|
|
|
5154
|
|
|
5155 speccount = catches->pdlcount;
|
|
|
5156 if (catchpdl == speccount)
|
|
|
5157 {
|
|
|
5158 write_c_string (" # (catch ", stream);
|
|
|
5159 Fprin1 (catches->tag, stream);
|
|
|
5160 write_c_string (" ...)\n", stream);
|
|
|
5161 }
|
|
|
5162 else
|
|
|
5163 {
|
|
|
5164 write_c_string (" # (condition-case ... . ", stream);
|
|
|
5165 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
5166 write_c_string (")\n", stream);
|
|
|
5167 }
|
|
|
5168 catches = catches->next;
|
|
|
5169 }
|
|
|
5170 else if (!backlist)
|
|
|
5171 break;
|
|
|
5172 else
|
|
|
5173 {
|
|
|
5174 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
5175 {
|
|
|
5176 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
5177 speccount = backlist->pdlcount;
|
|
|
5178 }
|
|
|
5179 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
5180 stream);
|
|
|
5181 if (backlist->nargs == UNEVALLED)
|
|
|
5182 {
|
|
|
5183 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
5184 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
5185 }
|
|
|
5186 else
|
|
|
5187 {
|
|
|
5188 Lisp_Object tem = *backlist->function;
|
|
|
5189 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
5190 write_c_string ("(", stream);
|
|
|
5191 if (backlist->nargs == MANY)
|
|
|
5192 {
|
|
|
5193 int i;
|
|
|
5194 Lisp_Object tail = Qnil;
|
|
|
5195 struct gcpro ngcpro1;
|
|
|
5196
|
|
|
5197 NGCPRO1 (tail);
|
|
|
5198 for (tail = *backlist->args, i = 0;
|
|
|
5199 !NILP (tail);
|
|
|
5200 tail = Fcdr (tail), i++)
|
|
|
5201 {
|
|
|
5202 if (i != 0) write_c_string (" ", stream);
|
|
|
5203 Fprin1 (Fcar (tail), stream);
|
|
|
5204 }
|
|
|
5205 NUNGCPRO;
|
|
|
5206 }
|
|
|
5207 else
|
|
|
5208 {
|
|
|
5209 int i;
|
|
|
5210 for (i = 0; i < backlist->nargs; i++)
|
|
|
5211 {
|
|
|
5212 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
5213 write_c_string("\"...\"", stream);
|
|
|
5214 continue;
|
|
|
5215 }
|
|
|
5216 if (i != 0) write_c_string (" ", stream);
|
|
|
5217 Fprin1 (backlist->args[i], stream);
|
|
|
5218 }
|
|
|
5219 }
|
|
442
|
5220 write_c_string (")\n", stream);
|
|
428
|
5221 }
|
|
|
5222 backlist = backlist->next;
|
|
|
5223 }
|
|
|
5224 }
|
|
|
5225 Vprint_level = old_level;
|
|
|
5226 print_readably = old_pr;
|
|
|
5227 print_escape_newlines = old_nl;
|
|
|
5228 UNGCPRO;
|
|
|
5229 Vinhibit_quit = oiq;
|
|
|
5230 return Qnil;
|
|
|
5231 }
|
|
|
5232
|
|
|
5233
|
|
|
5234 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
|
5235 Return the function and arguments N frames up from current execution point.
|
|
|
5236 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
5237 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
5238 If that frame has evaluated its arguments and called its function already,
|
|
|
5239 the value is (t FUNCTION ARG-VALUES...).
|
|
|
5240 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
5241 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
5242 or a lambda expression for macro calls.
|
|
|
5243 If N is more than the number of frames, the value is nil.
|
|
|
5244 */
|
|
|
5245 (nframes))
|
|
|
5246 {
|
|
|
5247 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5248 REGISTER int i;
|
|
|
5249 Lisp_Object tem;
|
|
|
5250
|
|
|
5251 CHECK_NATNUM (nframes);
|
|
|
5252
|
|
|
5253 /* Find the frame requested. */
|
|
|
5254 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
5255 backlist = backlist->next;
|
|
|
5256
|
|
|
5257 if (!backlist)
|
|
|
5258 return Qnil;
|
|
|
5259 if (backlist->nargs == UNEVALLED)
|
|
|
5260 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
5261 else
|
|
|
5262 {
|
|
|
5263 if (backlist->nargs == MANY)
|
|
|
5264 tem = *backlist->args;
|
|
|
5265 else
|
|
|
5266 tem = Flist (backlist->nargs, backlist->args);
|
|
|
5267
|
|
|
5268 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
5269 }
|
|
|
5270 }
|
|
|
5271
|
|
|
5272
|
|
|
5273 /************************************************************************/
|
|
|
5274 /* Warnings */
|
|
|
5275 /************************************************************************/
|
|
|
5276
|
|
|
5277 void
|
|
|
5278 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
5279 Lisp_Object obj)
|
|
|
5280 {
|
|
|
5281 obj = list1 (list3 (class, level, obj));
|
|
|
5282 if (NILP (Vpending_warnings))
|
|
|
5283 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
5284 else
|
|
|
5285 {
|
|
|
5286 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
5287 Vpending_warnings_tail = obj;
|
|
|
5288 }
|
|
|
5289 }
|
|
|
5290
|
|
|
5291 /* #### This should probably accept Lisp objects; but then we have
|
|
|
5292 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
5293
|
|
|
5294 An alternative approach is to just pass some non-string type of
|
|
|
5295 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
5296 automatically be called when it is safe to do so. */
|
|
|
5297
|
|
|
5298 void
|
|
442
|
5299 warn_when_safe (Lisp_Object class, Lisp_Object level, const char *fmt, ...)
|
|
428
|
5300 {
|
|
|
5301 Lisp_Object obj;
|
|
|
5302 va_list args;
|
|
|
5303
|
|
|
5304 va_start (args, fmt);
|
|
442
|
5305 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt),
|
|
428
|
5306 Qnil, -1, args);
|
|
|
5307 va_end (args);
|
|
|
5308
|
|
|
5309 warn_when_safe_lispobj (class, level, obj);
|
|
|
5310 }
|
|
|
5311
|
|
|
5312
|
|
|
5313
|
|
|
5314
|
|
|
5315 /************************************************************************/
|
|
|
5316 /* Initialization */
|
|
|
5317 /************************************************************************/
|
|
|
5318
|
|
|
5319 void
|
|
|
5320 syms_of_eval (void)
|
|
|
5321 {
|
|
442
|
5322 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
5323
|
|
428
|
5324 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5325 defsymbol (&Qautoload, "autoload");
|
|
|
5326 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5327 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5328 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5329 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5330 defsymbol (&Qdebugger, "debugger");
|
|
|
5331 defsymbol (&Qmacro, "macro");
|
|
|
5332 defsymbol (&Qand_rest, "&rest");
|
|
|
5333 defsymbol (&Qand_optional, "&optional");
|
|
|
5334 /* Note that the process code also uses Qexit */
|
|
|
5335 defsymbol (&Qexit, "exit");
|
|
|
5336 defsymbol (&Qsetq, "setq");
|
|
|
5337 defsymbol (&Qinteractive, "interactive");
|
|
|
5338 defsymbol (&Qcommandp, "commandp");
|
|
|
5339 defsymbol (&Qdefun, "defun");
|
|
|
5340 defsymbol (&Qprogn, "progn");
|
|
|
5341 defsymbol (&Qvalues, "values");
|
|
|
5342 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5343 defsymbol (&Qrun_hooks, "run-hooks");
|
|
|
5344 defsymbol (&Qif, "if");
|
|
|
5345
|
|
|
5346 DEFSUBR (For);
|
|
|
5347 DEFSUBR (Fand);
|
|
|
5348 DEFSUBR (Fif);
|
|
|
5349 DEFSUBR_MACRO (Fwhen);
|
|
|
5350 DEFSUBR_MACRO (Funless);
|
|
|
5351 DEFSUBR (Fcond);
|
|
|
5352 DEFSUBR (Fprogn);
|
|
|
5353 DEFSUBR (Fprog1);
|
|
|
5354 DEFSUBR (Fprog2);
|
|
|
5355 DEFSUBR (Fsetq);
|
|
|
5356 DEFSUBR (Fquote);
|
|
|
5357 DEFSUBR (Ffunction);
|
|
|
5358 DEFSUBR (Fdefun);
|
|
|
5359 DEFSUBR (Fdefmacro);
|
|
|
5360 DEFSUBR (Fdefvar);
|
|
|
5361 DEFSUBR (Fdefconst);
|
|
|
5362 DEFSUBR (Fuser_variable_p);
|
|
|
5363 DEFSUBR (Flet);
|
|
|
5364 DEFSUBR (FletX);
|
|
|
5365 DEFSUBR (Fwhile);
|
|
|
5366 DEFSUBR (Fmacroexpand_internal);
|
|
|
5367 DEFSUBR (Fcatch);
|
|
|
5368 DEFSUBR (Fthrow);
|
|
|
5369 DEFSUBR (Funwind_protect);
|
|
|
5370 DEFSUBR (Fcondition_case);
|
|
|
5371 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5372 DEFSUBR (Fsignal);
|
|
|
5373 DEFSUBR (Finteractive_p);
|
|
|
5374 DEFSUBR (Fcommandp);
|
|
|
5375 DEFSUBR (Fcommand_execute);
|
|
|
5376 DEFSUBR (Fautoload);
|
|
|
5377 DEFSUBR (Feval);
|
|
|
5378 DEFSUBR (Fapply);
|
|
|
5379 DEFSUBR (Ffuncall);
|
|
|
5380 DEFSUBR (Ffunctionp);
|
|
|
5381 DEFSUBR (Ffunction_min_args);
|
|
|
5382 DEFSUBR (Ffunction_max_args);
|
|
|
5383 DEFSUBR (Frun_hooks);
|
|
|
5384 DEFSUBR (Frun_hook_with_args);
|
|
|
5385 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5386 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5387 DEFSUBR (Fbacktrace_debug);
|
|
|
5388 DEFSUBR (Fbacktrace);
|
|
|
5389 DEFSUBR (Fbacktrace_frame);
|
|
|
5390 }
|
|
|
5391
|
|
|
5392 void
|
|
|
5393 reinit_eval (void)
|
|
|
5394 {
|
|
|
5395 specpdl_ptr = specpdl;
|
|
|
5396 specpdl_depth_counter = 0;
|
|
|
5397 catchlist = 0;
|
|
|
5398 Vcondition_handlers = Qnil;
|
|
|
5399 backtrace_list = 0;
|
|
|
5400 Vquit_flag = Qnil;
|
|
|
5401 debug_on_next_call = 0;
|
|
|
5402 lisp_eval_depth = 0;
|
|
|
5403 entering_debugger = 0;
|
|
|
5404 }
|
|
|
5405
|
|
|
5406 void
|
|
|
5407 reinit_vars_of_eval (void)
|
|
|
5408 {
|
|
|
5409 preparing_for_armageddon = 0;
|
|
|
5410 in_warnings = 0;
|
|
|
5411 Qunbound_suspended_errors_tag = make_opaque_ptr (&Qunbound_suspended_errors_tag);
|
|
|
5412 staticpro_nodump (&Qunbound_suspended_errors_tag);
|
|
|
5413
|
|
|
5414 specpdl_size = 50;
|
|
|
5415 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
5416 /* XEmacs change: increase these values. */
|
|
|
5417 max_specpdl_size = 3000;
|
|
442
|
5418 max_lisp_eval_depth = 1000;
|
|
|
5419 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
5420 throw_level = 0;
|
|
|
5421 #endif
|
|
|
5422 }
|
|
|
5423
|
|
|
5424 void
|
|
|
5425 vars_of_eval (void)
|
|
|
5426 {
|
|
|
5427 reinit_vars_of_eval ();
|
|
|
5428
|
|
|
5429 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5430 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5431 */ );
|
|
|
5432
|
|
|
5433 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5434 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5435 This limit is to catch infinite recursions for you before they cause
|
|
|
5436 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5437 You can safely make it considerably larger than its default value,
|
|
|
5438 if that proves inconveniently small.
|
|
|
5439 */ );
|
|
|
5440
|
|
|
5441 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5442 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5443 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5444 */ );
|
|
|
5445 Vquit_flag = Qnil;
|
|
|
5446
|
|
|
5447 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5448 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5449 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5450 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5451 To prevent this happening, set `quit-flag' to nil
|
|
|
5452 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5453 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5454 an X frame.
|
|
|
5455 */ );
|
|
|
5456 Vinhibit_quit = Qnil;
|
|
|
5457
|
|
|
5458 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5459 *Non-nil means automatically display a backtrace buffer
|
|
|
5460 after any error that is not handled by a `condition-case'.
|
|
|
5461 If the value is a list, an error only means to display a backtrace
|
|
|
5462 if one of its condition symbols appears in the list.
|
|
|
5463 See also variable `stack-trace-on-signal'.
|
|
|
5464 */ );
|
|
|
5465 Vstack_trace_on_error = Qnil;
|
|
|
5466
|
|
|
5467 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5468 *Non-nil means automatically display a backtrace buffer
|
|
|
5469 after any error that is signalled, whether or not it is handled by
|
|
|
5470 a `condition-case'.
|
|
|
5471 If the value is a list, an error only means to display a backtrace
|
|
|
5472 if one of its condition symbols appears in the list.
|
|
|
5473 See also variable `stack-trace-on-error'.
|
|
|
5474 */ );
|
|
|
5475 Vstack_trace_on_signal = Qnil;
|
|
|
5476
|
|
|
5477 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5478 *List of errors for which the debugger should not be called.
|
|
|
5479 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5480 If any element applies to a given error, that error skips the debugger
|
|
|
5481 and just returns to top level.
|
|
|
5482 This overrides the variable `debug-on-error'.
|
|
|
5483 It does not apply to errors handled by `condition-case'.
|
|
|
5484 */ );
|
|
|
5485 Vdebug_ignored_errors = Qnil;
|
|
|
5486
|
|
|
5487 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5488 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5489 The debugger will not be entered if the error is handled by
|
|
|
5490 a `condition-case'.
|
|
|
5491 If the value is a list, an error only means to enter the debugger
|
|
|
5492 if one of its condition symbols appears in the list.
|
|
|
5493 This variable is overridden by `debug-ignored-errors'.
|
|
|
5494 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5495 */ );
|
|
|
5496 Vdebug_on_error = Qnil;
|
|
|
5497
|
|
|
5498 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5499 *Non-nil means enter debugger if an error is signalled.
|
|
|
5500 The debugger will be entered whether or not the error is handled by
|
|
|
5501 a `condition-case'.
|
|
|
5502 If the value is a list, an error only means to enter the debugger
|
|
|
5503 if one of its condition symbols appears in the list.
|
|
|
5504 See also variable `debug-on-quit'.
|
|
|
5505 */ );
|
|
|
5506 Vdebug_on_signal = Qnil;
|
|
|
5507
|
|
|
5508 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5509 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5510 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5511 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5512 control-shift-G to signal a critical quit.
|
|
|
5513 */ );
|
|
|
5514 debug_on_quit = 0;
|
|
|
5515
|
|
|
5516 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5517 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5518 */ );
|
|
|
5519
|
|
|
5520 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5521 Function to call to invoke debugger.
|
|
|
5522 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5523 this function's value will be returned instead of that.
|
|
|
5524 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5525 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5526 If due to `eval' entry, one arg, t.
|
|
|
5527 */ );
|
|
|
5528 Vdebugger = Qnil;
|
|
|
5529
|
|
|
5530 staticpro (&Vpending_warnings);
|
|
|
5531 Vpending_warnings = Qnil;
|
|
|
5532 pdump_wire (&Vpending_warnings_tail);
|
|
|
5533 Vpending_warnings_tail = Qnil;
|
|
|
5534
|
|
|
5535 staticpro (&Vautoload_queue);
|
|
|
5536 Vautoload_queue = Qnil;
|
|
|
5537
|
|
|
5538 staticpro (&Vcondition_handlers);
|
|
|
5539
|
|
|
5540 staticpro (&Vcurrent_warning_class);
|
|
|
5541 Vcurrent_warning_class = Qnil;
|
|
|
5542
|
|
|
5543 staticpro (&Vcurrent_error_state);
|
|
|
5544 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5545
|
|
|
5546 reinit_eval ();
|
|
|
5547 }
|
