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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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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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23
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24 #include <config.h>
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25 #include "lisp.h"
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26
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27 #include "commands.h"
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28 #include "backtrace.h"
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29 #include "bytecode.h"
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30 #include "buffer.h"
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31 #include "console.h"
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32 #include "opaque.h"
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33
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34 #ifdef ERROR_CHECK_GC
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35 int always_gc; /* Debugging hack */
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36 #else
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37 #define always_gc 0
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38 #endif
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39
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40 struct backtrace *backtrace_list;
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41
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42 /* Note: you must always fill in all of the fields in a backtrace structure
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43 before pushing them on the backtrace_list. The profiling code depends
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44 on this. */
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45
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46 #define PUSH_BACKTRACE(bt) do { \
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47 (bt).next = backtrace_list; \
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48 backtrace_list = &(bt); \
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49 } while (0)
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50
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51 #define POP_BACKTRACE(bt) do { \
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52 backtrace_list = (bt).next; \
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53 } while (0)
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54
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55 /* Macros for calling subrs with an argument list whose length is only
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56 known at runtime. See EXFUN and DEFUN for similar hackery. */
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57
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58 #define AV_0(av)
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59 #define AV_1(av) av[0]
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60 #define AV_2(av) AV_1(av), av[1]
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61 #define AV_3(av) AV_2(av), av[2]
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62 #define AV_4(av) AV_3(av), av[3]
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63 #define AV_5(av) AV_4(av), av[4]
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64 #define AV_6(av) AV_5(av), av[5]
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65 #define AV_7(av) AV_6(av), av[6]
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66 #define AV_8(av) AV_7(av), av[7]
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67
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68 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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69 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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70
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71 /* If subrs take more than 8 arguments, more cases need to be added
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72 to this switch. (But wait - don't do it - if you really need
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73 a SUBR with more than 8 arguments, use max_args == MANY.
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74 See the DEFUN macro in lisp.h) */
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75 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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76 void (*PF_fn)(void) = (void (*)(void)) fn; \
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77 Lisp_Object *PF_av = (av); \
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78 switch (ac) \
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79 { \
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436
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80 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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428
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81 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
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82 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
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83 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
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84 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
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85 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
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86 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
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87 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
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88 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
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89 } \
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90 } while (0)
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91
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92 #define FUNCALL_SUBR(rv, subr, av, ac) \
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93 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
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94
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95
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96 /* This is the list of current catches (and also condition-cases).
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97 This is a stack: the most recent catch is at the head of the
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98 list. Catches are created by declaring a 'struct catchtag'
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99 locally, filling the .TAG field in with the tag, and doing
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100 a setjmp() on .JMP. Fthrow() will store the value passed
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101 to it in .VAL and longjmp() back to .JMP, back to the function
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102 that established the catch. This will always be either
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103 internal_catch() (catches established internally or through
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104 `catch') or condition_case_1 (condition-cases established
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105 internally or through `condition-case').
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106
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107 The catchtag also records the current position in the
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108 call stack (stored in BACKTRACE_LIST), the current position
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109 in the specpdl stack (used for variable bindings and
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110 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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111 current position in the GCPRO stack. All of these are
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112 restored by Fthrow().
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113 */
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114
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115 struct catchtag *catchlist;
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116
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117 Lisp_Object Qautoload, Qmacro, Qexit;
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118 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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119 Lisp_Object Vquit_flag, Vinhibit_quit;
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120 Lisp_Object Qand_rest, Qand_optional;
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121 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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122 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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123 Lisp_Object Qdebugger;
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124 Lisp_Object Qinhibit_quit;
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125 Lisp_Object Qrun_hooks;
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126 Lisp_Object Qsetq;
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127 Lisp_Object Qdisplay_warning;
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128 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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129 Lisp_Object Qif;
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130
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131 /* Records whether we want errors to occur. This will be a boolean,
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132 nil (errors OK) or t (no errors). If t, an error will cause a
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133 throw to Qunbound_suspended_errors_tag.
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134
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135 See call_with_suspended_errors(). */
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136 Lisp_Object Vcurrent_error_state;
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137
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138 /* Current warning class when warnings occur, or nil for no warnings.
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139 Only meaningful when Vcurrent_error_state is non-nil.
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140 See call_with_suspended_errors(). */
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141 Lisp_Object Vcurrent_warning_class;
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142
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143 /* Special catch tag used in call_with_suspended_errors(). */
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144 Lisp_Object Qunbound_suspended_errors_tag;
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145
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146 /* Non-nil means we're going down, so we better not run any hooks
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147 or do other non-essential stuff. */
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148 int preparing_for_armageddon;
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149
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150 /* Non-nil means record all fset's and provide's, to be undone
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151 if the file being autoloaded is not fully loaded.
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152 They are recorded by being consed onto the front of Vautoload_queue:
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153 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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154 Lisp_Object Vautoload_queue;
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155
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156 /* Current number of specbindings allocated in specpdl. */
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157 int specpdl_size;
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158
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159 /* Pointer to beginning of specpdl. */
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160 struct specbinding *specpdl;
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161
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162 /* Pointer to first unused element in specpdl. */
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163 struct specbinding *specpdl_ptr;
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164
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165 /* specpdl_ptr - specpdl */
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166 int specpdl_depth_counter;
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167
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168 /* Maximum size allowed for specpdl allocation */
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169 int max_specpdl_size;
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170
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171 /* Depth in Lisp evaluations and function calls. */
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172 static int lisp_eval_depth;
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173
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174 /* Maximum allowed depth in Lisp evaluations and function calls. */
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175 int max_lisp_eval_depth;
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176
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177 /* Nonzero means enter debugger before next function call */
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178 static int debug_on_next_call;
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179
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180 /* List of conditions (non-nil atom means all) which cause a backtrace
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181 if an error is handled by the command loop's error handler. */
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182 Lisp_Object Vstack_trace_on_error;
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183
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184 /* List of conditions (non-nil atom means all) which enter the debugger
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185 if an error is handled by the command loop's error handler. */
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186 Lisp_Object Vdebug_on_error;
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187
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188 /* List of conditions and regexps specifying error messages which
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189 do not enter the debugger even if Vdebug_on_error says they should. */
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190 Lisp_Object Vdebug_ignored_errors;
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191
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192 /* List of conditions (non-nil atom means all) which cause a backtrace
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193 if any error is signalled. */
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194 Lisp_Object Vstack_trace_on_signal;
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195
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196 /* List of conditions (non-nil atom means all) which enter the debugger
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197 if any error is signalled. */
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198 Lisp_Object Vdebug_on_signal;
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199
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200 /* Nonzero means enter debugger if a quit signal
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201 is handled by the command loop's error handler.
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202
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203 From lisp, this is a boolean variable and may have the values 0 and 1.
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204 But, eval.c temporarily uses the second bit of this variable to indicate
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205 that a critical_quit is in progress. The second bit is reset immediately
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206 after it is processed in signal_call_debugger(). */
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207 int debug_on_quit;
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208
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209 #if 0 /* FSFmacs */
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210 /* entering_debugger is basically equivalent */
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211 /* The value of num_nonmacro_input_chars as of the last time we
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212 started to enter the debugger. If we decide to enter the debugger
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213 again when this is still equal to num_nonmacro_input_chars, then we
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214 know that the debugger itself has an error, and we should just
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215 signal the error instead of entering an infinite loop of debugger
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216 invocations. */
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217 int when_entered_debugger;
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218 #endif
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219
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220 /* Nonzero means we are trying to enter the debugger.
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221 This is to prevent recursive attempts.
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222 Cleared by the debugger calling Fbacktrace */
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223 static int entering_debugger;
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224
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225 /* Function to call to invoke the debugger */
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226 Lisp_Object Vdebugger;
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227
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228 /* Chain of condition handlers currently in effect.
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229 The elements of this chain are contained in the stack frames
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230 of Fcondition_case and internal_condition_case.
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231 When an error is signaled (by calling Fsignal, below),
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232 this chain is searched for an element that applies.
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233
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234 Each element of this list is one of the following:
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235
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236 A list of a handler function and possibly args to pass to
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237 the function. This is a handler established with
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238 `call-with-condition-handler' (q.v.).
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239
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240 A list whose car is Qunbound and whose cdr is Qt.
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241 This is a special condition-case handler established
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242 by C code with condition_case_1(). All errors are
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243 trapped; the debugger is not invoked even if
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244 `debug-on-error' was set.
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245
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246 A list whose car is Qunbound and whose cdr is Qerror.
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247 This is a special condition-case handler established
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248 by C code with condition_case_1(). It is like Qt
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249 except that the debugger is invoked normally if it is
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250 called for.
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251
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252 A list whose car is Qunbound and whose cdr is a list
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253 of lists (CONDITION-NAME BODY ...) exactly as in
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254 `condition-case'. This is a normal `condition-case'
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255 handler.
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256
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257 Note that in all cases *except* the first, there is a
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258 corresponding catch, whose TAG is the value of
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259 Vcondition_handlers just after the handler data just
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260 described is pushed onto it. The reason is that
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261 `condition-case' handlers need to throw back to the
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262 place where the handler was installed before invoking
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263 it, while `call-with-condition-handler' handlers are
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264 invoked in the environment that `signal' was invoked
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265 in.
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266 */
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267 static Lisp_Object Vcondition_handlers;
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268
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269
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270 #if 0 /* no longer used */
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271 /* Used for error catching purposes by throw_or_bomb_out */
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272 static int throw_level;
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273 #endif /* unused */
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274
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275
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276 /************************************************************************/
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277 /* The subr object type */
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278 /************************************************************************/
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279
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280 static void
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281 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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282 {
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283 Lisp_Subr *subr = XSUBR (obj);
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284 CONST char *header =
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285 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
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286 CONST char *name = subr_name (subr);
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287 CONST char *trailer = subr->prompt ? " (interactive)>" : ">";
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288
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289 if (print_readably)
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290 error ("printing unreadable object %s%s%s", header, name, trailer);
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291
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292 write_c_string (header, printcharfun);
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293 write_c_string (name, printcharfun);
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294 write_c_string (trailer, printcharfun);
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295 }
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296
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297 static const struct lrecord_description subr_description[] = {
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298 { XD_DOC_STRING, offsetof(Lisp_Subr, doc) },
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299 { XD_END }
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300 };
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301
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302 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
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303 this_one_is_unmarkable, print_subr, 0, 0, 0,
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304 subr_description,
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305 Lisp_Subr);
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306
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307 /************************************************************************/
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308 /* Entering the debugger */
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309 /************************************************************************/
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310
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311 /* unwind-protect used by call_debugger() to restore the value of
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312 entering_debugger. (We cannot use specbind() because the
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313 variable is not Lisp-accessible.) */
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314
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315 static Lisp_Object
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316 restore_entering_debugger (Lisp_Object arg)
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317 {
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318 entering_debugger = ! NILP (arg);
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319 return arg;
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320 }
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321
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322 /* Actually call the debugger. ARG is a list of args that will be
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323 passed to the debugger function, as follows;
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324
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325 If due to frame exit, args are `exit' and the value being returned;
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326 this function's value will be returned instead of that.
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327 If due to error, args are `error' and a list of the args to `signal'.
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328 If due to `apply' or `funcall' entry, one arg, `lambda'.
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329 If due to `eval' entry, one arg, t.
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330
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331 */
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332
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333 static Lisp_Object
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334 call_debugger_259 (Lisp_Object arg)
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335 {
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336 return apply1 (Vdebugger, arg);
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337 }
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338
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339 /* Call the debugger, doing some encapsulation. We make sure we have
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340 some room on the eval and specpdl stacks, and bind entering_debugger
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341 to 1 during this call. This is used to trap errors that may occur
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342 when entering the debugger (e.g. the value of `debugger' is invalid),
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343 so that the debugger will not be recursively entered if debug-on-error
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344 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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345 enter the debugger.) entering_debugger gets reset to 0 as soon
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346 as a backtrace is displayed, so that further errors can indeed be
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347 handled normally.
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348
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349 We also establish a catch for 'debugger. If the debugger function
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350 throws to this instead of returning a value, it means that the user
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351 pressed 'c' (pretend like the debugger was never entered). The
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352 function then returns Qunbound. (If the user pressed 'r', for
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353 return a value, then the debugger function returns normally with
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354 this value.)
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355
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356 The difference between 'c' and 'r' is as follows:
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357
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358 debug-on-call:
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359 No difference. The call proceeds as normal.
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360 debug-on-exit:
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361 With 'r', the specified value is returned as the function's
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362 return value. With 'c', the value that would normally be
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363 returned is returned.
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364 signal:
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365 With 'r', the specified value is returned as the return
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366 value of `signal'. (This is the only time that `signal'
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367 can return, instead of making a non-local exit.) With `c',
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368 `signal' will continue looking for handlers as if the
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369 debugger was never entered, and will probably end up
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370 throwing to a handler or to top-level.
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371 */
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372
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373 static Lisp_Object
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374 call_debugger (Lisp_Object arg)
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375 {
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376 int threw;
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377 Lisp_Object val;
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378 int speccount;
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379
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|
|
380 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
381 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
382 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
383 max_specpdl_size = specpdl_size + 40;
|
|
|
384 debug_on_next_call = 0;
|
|
|
385
|
|
|
386 speccount = specpdl_depth();
|
|
|
387 record_unwind_protect (restore_entering_debugger,
|
|
|
388 (entering_debugger ? Qt : Qnil));
|
|
|
389 entering_debugger = 1;
|
|
|
390 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
391
|
|
|
392 return unbind_to (speccount, ((threw)
|
|
|
393 ? Qunbound /* Not returning a value */
|
|
|
394 : val));
|
|
|
395 }
|
|
|
396
|
|
|
397 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
398 with the appropriate args for this. VAL is the exit value that is
|
|
|
399 about to be returned. */
|
|
|
400
|
|
|
401 static Lisp_Object
|
|
|
402 do_debug_on_exit (Lisp_Object val)
|
|
|
403 {
|
|
|
404 /* This is falsified by call_debugger */
|
|
|
405 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
|
406
|
|
|
407 return !UNBOUNDP (v) ? v : val;
|
|
|
408 }
|
|
|
409
|
|
|
410 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
411 with the appropriate args for this. VAL is either t for a call
|
|
|
412 through `eval' or 'lambda for a call through `funcall'.
|
|
|
413
|
|
|
414 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
415 FUNCALL can be defined as
|
|
|
416
|
|
|
417 (defmacro func (fun &rest args)
|
|
|
418 (cons (eval fun) args))
|
|
|
419
|
|
|
420 and should be treated as such.
|
|
|
421 */
|
|
|
422
|
|
|
423 static void
|
|
|
424 do_debug_on_call (Lisp_Object code)
|
|
|
425 {
|
|
|
426 debug_on_next_call = 0;
|
|
|
427 backtrace_list->debug_on_exit = 1;
|
|
|
428 call_debugger (list1 (code));
|
|
|
429 }
|
|
|
430
|
|
|
431 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
432 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
433 and CONDITIONS is the list of error conditions associated with
|
|
|
434 the error being signalled. This returns non-nil if LIST
|
|
|
435 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
436 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
437 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
438 same as one of the symbols in CONDITIONS.) */
|
|
|
439
|
|
|
440 static int
|
|
|
441 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
442 {
|
|
|
443 if (NILP (list))
|
|
|
444 return 0;
|
|
|
445 if (! CONSP (list))
|
|
|
446 return 1;
|
|
|
447
|
|
|
448 while (CONSP (conditions))
|
|
|
449 {
|
|
|
450 Lisp_Object this, tail;
|
|
|
451 this = XCAR (conditions);
|
|
|
452 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
453 if (EQ (XCAR (tail), this))
|
|
|
454 return 1;
|
|
|
455 conditions = XCDR (conditions);
|
|
|
456 }
|
|
|
457 return 0;
|
|
|
458 }
|
|
|
459
|
|
|
460
|
|
|
461 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
462 and described by SIGNAL-DATA, should skip the debugger
|
|
|
463 according to debugger-ignore-errors. */
|
|
|
464
|
|
|
465 static int
|
|
|
466 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
467 {
|
|
|
468 /* This function can GC */
|
|
|
469 Lisp_Object tail;
|
|
|
470 int first_string = 1;
|
|
|
471 Lisp_Object error_message = Qnil;
|
|
|
472
|
|
|
473 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
474 {
|
|
|
475 if (STRINGP (XCAR (tail)))
|
|
|
476 {
|
|
|
477 if (first_string)
|
|
|
478 {
|
|
|
479 error_message = Ferror_message_string (data);
|
|
|
480 first_string = 0;
|
|
|
481 }
|
|
|
482 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
483 return 1;
|
|
|
484 }
|
|
|
485 else
|
|
|
486 {
|
|
|
487 Lisp_Object contail;
|
|
|
488
|
|
|
489 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
490 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
491 return 1;
|
|
|
492 }
|
|
|
493 }
|
|
|
494
|
|
|
495 return 0;
|
|
|
496 }
|
|
|
497
|
|
|
498 /* Actually generate a backtrace on STREAM. */
|
|
|
499
|
|
|
500 static Lisp_Object
|
|
|
501 backtrace_259 (Lisp_Object stream)
|
|
|
502 {
|
|
|
503 return Fbacktrace (stream, Qt);
|
|
|
504 }
|
|
|
505
|
|
|
506 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
|
507 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
508 associated with the error being signalled. SIG is the actual error
|
|
|
509 being signalled, and DATA is the associated data (these are exactly
|
|
|
510 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
511 list of error handlers that are to be put in place while the debugger
|
|
|
512 is called. This is generally the remaining handlers that are
|
|
|
513 outside of the innermost handler trapping this error. This way,
|
|
|
514 if the same error occurs inside of the debugger, you usually don't get
|
|
|
515 the debugger entered recursively.
|
|
|
516
|
|
|
517 This function returns Qunbound if it didn't call the debugger or if
|
|
|
518 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
519 debugger was never entered. Otherwise, it returns the value
|
|
|
520 that the user specified with `r'. (Note that much of the time,
|
|
|
521 the user will abort with C-], and we will never have a chance to
|
|
|
522 return anything at all.)
|
|
|
523
|
|
|
524 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
525 and stack-trace-on-signal to control whether we do anything.
|
|
|
526 This is so that debug-on-error doesn't make handled errors
|
|
|
527 cause the debugger to get invoked.
|
|
|
528
|
|
|
529 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
530 those functions aren't done more than once in a single `signal'
|
|
|
531 session. */
|
|
|
532
|
|
|
533 static Lisp_Object
|
|
|
534 signal_call_debugger (Lisp_Object conditions,
|
|
|
535 Lisp_Object sig, Lisp_Object data,
|
|
|
536 Lisp_Object active_handlers,
|
|
|
537 int signal_vars_only,
|
|
|
538 int *stack_trace_displayed,
|
|
|
539 int *debugger_entered)
|
|
|
540 {
|
|
|
541 /* This function can GC */
|
|
|
542 Lisp_Object val = Qunbound;
|
|
|
543 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
544 Lisp_Object temp_data = Qnil;
|
|
|
545 int speccount = specpdl_depth();
|
|
|
546 struct gcpro gcpro1, gcpro2;
|
|
|
547 GCPRO2 (all_handlers, temp_data);
|
|
|
548
|
|
|
549 Vcondition_handlers = active_handlers;
|
|
|
550
|
|
|
551 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
|
552
|
|
|
553 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
554 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
555 && !skip_debugger (conditions, temp_data))
|
|
|
556 {
|
|
|
557 specbind (Qdebug_on_error, Qnil);
|
|
|
558 specbind (Qstack_trace_on_error, Qnil);
|
|
|
559 specbind (Qdebug_on_signal, Qnil);
|
|
|
560 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
561
|
|
|
562 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
563 backtrace_259,
|
|
|
564 Qnil,
|
|
|
565 Qnil);
|
|
|
566 unbind_to (speccount, Qnil);
|
|
|
567 *stack_trace_displayed = 1;
|
|
|
568 }
|
|
|
569
|
|
|
570 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
571 && (EQ (sig, Qquit)
|
|
|
572 ? debug_on_quit
|
|
|
573 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
574 && !skip_debugger (conditions, temp_data))
|
|
|
575 {
|
|
|
576 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
577 specbind (Qdebug_on_error, Qnil);
|
|
|
578 specbind (Qstack_trace_on_error, Qnil);
|
|
|
579 specbind (Qdebug_on_signal, Qnil);
|
|
|
580 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
581
|
|
|
582 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
583 *debugger_entered = 1;
|
|
|
584 }
|
|
|
585
|
|
|
586 if (!entering_debugger && !*stack_trace_displayed
|
|
|
587 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
588 {
|
|
|
589 specbind (Qdebug_on_error, Qnil);
|
|
|
590 specbind (Qstack_trace_on_error, Qnil);
|
|
|
591 specbind (Qdebug_on_signal, Qnil);
|
|
|
592 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
593
|
|
|
594 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
595 backtrace_259,
|
|
|
596 Qnil,
|
|
|
597 Qnil);
|
|
|
598 unbind_to (speccount, Qnil);
|
|
|
599 *stack_trace_displayed = 1;
|
|
|
600 }
|
|
|
601
|
|
|
602 if (!entering_debugger && !*debugger_entered
|
|
|
603 && (EQ (sig, Qquit)
|
|
|
604 ? debug_on_quit
|
|
|
605 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
606 {
|
|
|
607 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
608 specbind (Qdebug_on_error, Qnil);
|
|
|
609 specbind (Qstack_trace_on_error, Qnil);
|
|
|
610 specbind (Qdebug_on_signal, Qnil);
|
|
|
611 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
612
|
|
|
613 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
614 *debugger_entered = 1;
|
|
|
615 }
|
|
|
616
|
|
|
617 UNGCPRO;
|
|
|
618 Vcondition_handlers = all_handlers;
|
|
|
619 return unbind_to (speccount, val);
|
|
|
620 }
|
|
|
621
|
|
|
622
|
|
|
623 /************************************************************************/
|
|
|
624 /* The basic special forms */
|
|
|
625 /************************************************************************/
|
|
|
626
|
|
|
627 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
628 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
|
629
|
|
|
630 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
|
631 Eval args until one of them yields non-nil, then return that value.
|
|
|
632 The remaining args are not evalled at all.
|
|
|
633 If all args return nil, return nil.
|
|
|
634 */
|
|
|
635 (args))
|
|
|
636 {
|
|
|
637 /* This function can GC */
|
|
|
638 REGISTER Lisp_Object arg, val;
|
|
|
639
|
|
|
640 LIST_LOOP_2 (arg, args)
|
|
|
641 {
|
|
|
642 if (!NILP (val = Feval (arg)))
|
|
|
643 return val;
|
|
|
644 }
|
|
|
645
|
|
|
646 return Qnil;
|
|
|
647 }
|
|
|
648
|
|
|
649 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
|
650 Eval args until one of them yields nil, then return nil.
|
|
|
651 The remaining args are not evalled at all.
|
|
|
652 If no arg yields nil, return the last arg's value.
|
|
|
653 */
|
|
|
654 (args))
|
|
|
655 {
|
|
|
656 /* This function can GC */
|
|
|
657 REGISTER Lisp_Object arg, val = Qt;
|
|
|
658
|
|
|
659 LIST_LOOP_2 (arg, args)
|
|
|
660 {
|
|
|
661 if (NILP (val = Feval (arg)))
|
|
|
662 return val;
|
|
|
663 }
|
|
|
664
|
|
|
665 return val;
|
|
|
666 }
|
|
|
667
|
|
|
668 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
|
669 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
670 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
671 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
672 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
|
673 */
|
|
|
674 (args))
|
|
|
675 {
|
|
|
676 /* This function can GC */
|
|
|
677 Lisp_Object condition = XCAR (args);
|
|
|
678 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
679 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
680
|
|
|
681 if (!NILP (Feval (condition)))
|
|
|
682 return Feval (then_form);
|
|
|
683 else
|
|
|
684 return Fprogn (else_forms);
|
|
|
685 }
|
|
|
686
|
|
|
687 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
688 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
689
|
|
|
690 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
691 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
692 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
693 */
|
|
|
694 (int nargs, Lisp_Object *args))
|
|
|
695 {
|
|
|
696 Lisp_Object cond = args[0];
|
|
|
697 Lisp_Object body;
|
|
|
698
|
|
|
699 switch (nargs)
|
|
|
700 {
|
|
|
701 case 1: body = Qnil; break;
|
|
|
702 case 2: body = args[1]; break;
|
|
|
703 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
704 }
|
|
|
705
|
|
|
706 return list3 (Qif, cond, body);
|
|
|
707 }
|
|
|
708
|
|
|
709 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
710 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
711 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
712 */
|
|
|
713 (int nargs, Lisp_Object *args))
|
|
|
714 {
|
|
|
715 Lisp_Object cond = args[0];
|
|
|
716 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
717 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
|
718 }
|
|
|
719
|
|
|
720 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
|
721 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
722 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
723 and, if the value is non-nil, this clause succeeds:
|
|
|
724 then the expressions in BODY are evaluated and the last one's
|
|
|
725 value is the value of the cond-form.
|
|
|
726 If no clause succeeds, cond returns nil.
|
|
|
727 If a clause has one element, as in (CONDITION),
|
|
|
728 CONDITION's value if non-nil is returned from the cond-form.
|
|
|
729 */
|
|
|
730 (args))
|
|
|
731 {
|
|
|
732 /* This function can GC */
|
|
|
733 REGISTER Lisp_Object val, clause;
|
|
|
734
|
|
|
735 LIST_LOOP_2 (clause, args)
|
|
|
736 {
|
|
|
737 CHECK_CONS (clause);
|
|
|
738 if (!NILP (val = Feval (XCAR (clause))))
|
|
|
739 {
|
|
|
740 if (!NILP (clause = XCDR (clause)))
|
|
|
741 {
|
|
|
742 CHECK_TRUE_LIST (clause);
|
|
|
743 val = Fprogn (clause);
|
|
|
744 }
|
|
|
745 return val;
|
|
|
746 }
|
|
|
747 }
|
|
|
748
|
|
|
749 return Qnil;
|
|
|
750 }
|
|
|
751
|
|
|
752 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
|
753 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
|
754 */
|
|
|
755 (args))
|
|
|
756 {
|
|
|
757 /* This function can GC */
|
|
|
758 /* Caller must provide a true list in ARGS */
|
|
|
759 REGISTER Lisp_Object form, val = Qnil;
|
|
|
760 struct gcpro gcpro1;
|
|
|
761
|
|
|
762 GCPRO1 (args);
|
|
|
763
|
|
|
764 {
|
|
|
765 LIST_LOOP_2 (form, args)
|
|
|
766 val = Feval (form);
|
|
|
767 }
|
|
|
768
|
|
|
769 UNGCPRO;
|
|
|
770 return val;
|
|
|
771 }
|
|
|
772
|
|
|
773 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
774 Lisp_Object across calls to Feval(). */
|
|
|
775
|
|
|
776 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
|
777 Similar to `progn', but the value of the first form is returned.
|
|
|
778 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
779 The value of FIRST is saved during evaluation of the remaining args,
|
|
|
780 whose values are discarded.
|
|
|
781 */
|
|
|
782 (args))
|
|
|
783 {
|
|
|
784 /* This function can GC */
|
|
|
785 REGISTER Lisp_Object val, form;
|
|
|
786 struct gcpro gcpro1;
|
|
|
787
|
|
|
788 val = Feval (XCAR (args));
|
|
|
789
|
|
|
790 GCPRO1 (val);
|
|
|
791
|
|
|
792 {
|
|
|
793 LIST_LOOP_2 (form, XCDR (args))
|
|
|
794 Feval (form);
|
|
|
795 }
|
|
|
796
|
|
|
797 UNGCPRO;
|
|
|
798 return val;
|
|
|
799 }
|
|
|
800
|
|
|
801 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
|
802 Similar to `progn', but the value of the second form is returned.
|
|
|
803 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
804 The value of SECOND is saved during evaluation of the remaining args,
|
|
|
805 whose values are discarded.
|
|
|
806 */
|
|
|
807 (args))
|
|
|
808 {
|
|
|
809 /* This function can GC */
|
|
|
810 REGISTER Lisp_Object val, form, tail;
|
|
|
811 struct gcpro gcpro1;
|
|
|
812
|
|
|
813 Feval (XCAR (args));
|
|
|
814 args = XCDR (args);
|
|
|
815 val = Feval (XCAR (args));
|
|
|
816 args = XCDR (args);
|
|
|
817
|
|
|
818 GCPRO1 (val);
|
|
|
819
|
|
|
820 LIST_LOOP_3 (form, args, tail)
|
|
|
821 Feval (form);
|
|
|
822
|
|
|
823 UNGCPRO;
|
|
|
824 return val;
|
|
|
825 }
|
|
|
826
|
|
|
827 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
|
828 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
829 The value of the last form in BODY is returned.
|
|
|
830 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
831 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
832 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
|
833 */
|
|
|
834 (args))
|
|
|
835 {
|
|
|
836 /* This function can GC */
|
|
|
837 Lisp_Object var, tail;
|
|
|
838 Lisp_Object varlist = XCAR (args);
|
|
|
839 Lisp_Object body = XCDR (args);
|
|
|
840 int speccount = specpdl_depth();
|
|
|
841
|
|
|
842 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
|
843 {
|
|
|
844 Lisp_Object symbol, value, tem;
|
|
|
845 if (SYMBOLP (var))
|
|
|
846 symbol = var, value = Qnil;
|
|
|
847 else
|
|
|
848 {
|
|
|
849 CHECK_CONS (var);
|
|
|
850 symbol = XCAR (var);
|
|
|
851 tem = XCDR (var);
|
|
|
852 if (NILP (tem))
|
|
|
853 value = Qnil;
|
|
|
854 else
|
|
|
855 {
|
|
|
856 CHECK_CONS (tem);
|
|
|
857 value = Feval (XCAR (tem));
|
|
|
858 if (!NILP (XCDR (tem)))
|
|
|
859 signal_simple_error
|
|
|
860 ("`let' bindings can have only one value-form", var);
|
|
|
861 }
|
|
|
862 }
|
|
|
863 specbind (symbol, value);
|
|
|
864 }
|
|
|
865 return unbind_to (speccount, Fprogn (body));
|
|
|
866 }
|
|
|
867
|
|
|
868 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
|
869 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
870 The value of the last form in BODY is returned.
|
|
|
871 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
872 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
873 All the VALUEFORMs are evalled before any symbols are bound.
|
|
|
874 */
|
|
|
875 (args))
|
|
|
876 {
|
|
|
877 /* This function can GC */
|
|
|
878 Lisp_Object var, tail;
|
|
|
879 Lisp_Object varlist = XCAR (args);
|
|
|
880 Lisp_Object body = XCDR (args);
|
|
|
881 int speccount = specpdl_depth();
|
|
|
882 Lisp_Object *temps;
|
|
|
883 int idx;
|
|
|
884 struct gcpro gcpro1;
|
|
|
885
|
|
|
886 /* Make space to hold the values to give the bound variables. */
|
|
|
887 {
|
|
|
888 int varcount;
|
|
|
889 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
|
890 temps = alloca_array (Lisp_Object, varcount);
|
|
|
891 }
|
|
|
892
|
|
|
893 /* Compute the values and store them in `temps' */
|
|
|
894 GCPRO1 (*temps);
|
|
|
895 gcpro1.nvars = 0;
|
|
|
896
|
|
|
897 idx = 0;
|
|
|
898 LIST_LOOP_3 (var, varlist, tail)
|
|
|
899 {
|
|
|
900 Lisp_Object *value = &temps[idx++];
|
|
|
901 if (SYMBOLP (var))
|
|
|
902 *value = Qnil;
|
|
|
903 else
|
|
|
904 {
|
|
|
905 Lisp_Object tem;
|
|
|
906 CHECK_CONS (var);
|
|
|
907 tem = XCDR (var);
|
|
|
908 if (NILP (tem))
|
|
|
909 *value = Qnil;
|
|
|
910 else
|
|
|
911 {
|
|
|
912 CHECK_CONS (tem);
|
|
|
913 *value = Feval (XCAR (tem));
|
|
|
914 gcpro1.nvars = idx;
|
|
|
915
|
|
|
916 if (!NILP (XCDR (tem)))
|
|
|
917 signal_simple_error
|
|
|
918 ("`let' bindings can have only one value-form", var);
|
|
|
919 }
|
|
|
920 }
|
|
|
921 }
|
|
|
922
|
|
|
923 idx = 0;
|
|
|
924 LIST_LOOP_3 (var, varlist, tail)
|
|
|
925 {
|
|
|
926 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
|
927 }
|
|
|
928
|
|
|
929 UNGCPRO;
|
|
|
930
|
|
|
931 return unbind_to (speccount, Fprogn (body));
|
|
|
932 }
|
|
|
933
|
|
|
934 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
|
935 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
936 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
937 until TEST returns nil.
|
|
|
938 */
|
|
|
939 (args))
|
|
|
940 {
|
|
|
941 /* This function can GC */
|
|
|
942 Lisp_Object test = XCAR (args);
|
|
|
943 Lisp_Object body = XCDR (args);
|
|
|
944
|
|
|
945 while (!NILP (Feval (test)))
|
|
|
946 {
|
|
|
947 QUIT;
|
|
|
948 Fprogn (body);
|
|
|
949 }
|
|
|
950
|
|
|
951 return Qnil;
|
|
|
952 }
|
|
|
953
|
|
|
954 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
|
955 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
956 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
957 The values VAL are expressions; they are evaluated.
|
|
|
958 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
959 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
960 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
961 The return value of the `setq' form is the value of the last VAL.
|
|
|
962 */
|
|
|
963 (args))
|
|
|
964 {
|
|
|
965 /* This function can GC */
|
|
|
966 Lisp_Object symbol, tail, val = Qnil;
|
|
|
967 int nargs;
|
|
|
968 struct gcpro gcpro1;
|
|
|
969
|
|
|
970 GET_LIST_LENGTH (args, nargs);
|
|
|
971
|
|
|
972 if (nargs & 1) /* Odd number of arguments? */
|
|
|
973 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
974
|
|
|
975 GCPRO1 (val);
|
|
|
976
|
|
|
977 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
|
978 {
|
|
|
979 val = Feval (val);
|
|
|
980 Fset (symbol, val);
|
|
|
981 }
|
|
|
982
|
|
|
983 UNGCPRO;
|
|
|
984 return val;
|
|
|
985 }
|
|
|
986
|
|
|
987 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
|
988 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
|
989 */
|
|
|
990 (args))
|
|
|
991 {
|
|
|
992 return XCAR (args);
|
|
|
993 }
|
|
|
994
|
|
|
995 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
|
996 Like `quote', but preferred for objects which are functions.
|
|
|
997 In byte compilation, `function' causes its argument to be compiled.
|
|
|
998 `quote' cannot do that.
|
|
|
999 */
|
|
|
1000 (args))
|
|
|
1001 {
|
|
|
1002 return XCAR (args);
|
|
|
1003 }
|
|
|
1004
|
|
|
1005
|
|
|
1006 /************************************************************************/
|
|
|
1007 /* Defining functions/variables */
|
|
|
1008 /************************************************************************/
|
|
|
1009 static Lisp_Object
|
|
|
1010 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1011 {
|
|
|
1012 Ffset (name, defn);
|
|
|
1013 LOADHIST_ATTACH (name);
|
|
|
1014 return name;
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
|
1018 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1019 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1020 See also the function `interactive'.
|
|
|
1021 */
|
|
|
1022 (args))
|
|
|
1023 {
|
|
|
1024 /* This function can GC */
|
|
|
1025 return define_function (XCAR (args),
|
|
|
1026 Fcons (Qlambda, XCDR (args)));
|
|
|
1027 }
|
|
|
1028
|
|
|
1029 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
|
1030 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1031 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1032 When the macro is called, as in (NAME ARGS...),
|
|
|
1033 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1034 the list ARGS... as it appears in the expression,
|
|
|
1035 and the result should be a form to be evaluated instead of the original.
|
|
|
1036 */
|
|
|
1037 (args))
|
|
|
1038 {
|
|
|
1039 /* This function can GC */
|
|
|
1040 return define_function (XCAR (args),
|
|
|
1041 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
|
1045 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1046 You are not required to define a variable in order to use it,
|
|
|
1047 but the definition can supply documentation and an initial value
|
|
|
1048 in a way that tags can recognize.
|
|
|
1049
|
|
|
1050 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1051 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1052 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1053 void.)
|
|
|
1054 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1055 buffer-local values are not affected.
|
|
|
1056 INITVALUE and DOCSTRING are optional.
|
|
|
1057 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1058 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1059 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1060
|
|
|
1061 In lisp-interaction-mode defvar is treated as defconst.
|
|
|
1062 */
|
|
|
1063 (args))
|
|
|
1064 {
|
|
|
1065 /* This function can GC */
|
|
|
1066 Lisp_Object sym = XCAR (args);
|
|
|
1067
|
|
|
1068 if (!NILP (args = XCDR (args)))
|
|
|
1069 {
|
|
|
1070 Lisp_Object val = XCAR (args);
|
|
|
1071
|
|
|
1072 if (NILP (Fdefault_boundp (sym)))
|
|
|
1073 {
|
|
|
1074 struct gcpro gcpro1;
|
|
|
1075 GCPRO1 (val);
|
|
|
1076 val = Feval (val);
|
|
|
1077 Fset_default (sym, val);
|
|
|
1078 UNGCPRO;
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 if (!NILP (args = XCDR (args)))
|
|
|
1082 {
|
|
|
1083 Lisp_Object doc = XCAR (args);
|
|
|
1084 Fput (sym, Qvariable_documentation, doc);
|
|
|
1085 if (!NILP (args = XCDR (args)))
|
|
|
1086 error ("too many arguments");
|
|
|
1087 }
|
|
|
1088 }
|
|
|
1089
|
|
|
1090 #ifdef I18N3
|
|
|
1091 if (!NILP (Vfile_domain))
|
|
|
1092 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1093 #endif
|
|
|
1094
|
|
|
1095 LOADHIST_ATTACH (sym);
|
|
|
1096 return sym;
|
|
|
1097 }
|
|
|
1098
|
|
|
1099 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
|
1100 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1101 variable.
|
|
|
1102 The intent is that programs do not change this value, but users may.
|
|
|
1103 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1104 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1105 buffer-local values are not affected.
|
|
|
1106 DOCSTRING is optional.
|
|
|
1107 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1108 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1109
|
|
|
1110 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1111 normally loaded, since it is useful for users to be able to specify
|
|
|
1112 their own values for such variables before loading the library.
|
|
|
1113 Since `defconst' unconditionally assigns the variable,
|
|
|
1114 it would override the user's choice.
|
|
|
1115 */
|
|
|
1116 (args))
|
|
|
1117 {
|
|
|
1118 /* This function can GC */
|
|
|
1119 Lisp_Object sym = XCAR (args);
|
|
|
1120 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1121 struct gcpro gcpro1;
|
|
|
1122
|
|
|
1123 GCPRO1 (val);
|
|
|
1124
|
|
|
1125 Fset_default (sym, val);
|
|
|
1126
|
|
|
1127 UNGCPRO;
|
|
|
1128
|
|
|
1129 if (!NILP (args = XCDR (args)))
|
|
|
1130 {
|
|
|
1131 Lisp_Object doc = XCAR (args);
|
|
|
1132 Fput (sym, Qvariable_documentation, doc);
|
|
|
1133 if (!NILP (args = XCDR (args)))
|
|
|
1134 error ("too many arguments");
|
|
|
1135 }
|
|
|
1136
|
|
|
1137 #ifdef I18N3
|
|
|
1138 if (!NILP (Vfile_domain))
|
|
|
1139 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1140 #endif
|
|
|
1141
|
|
|
1142 LOADHIST_ATTACH (sym);
|
|
|
1143 return sym;
|
|
|
1144 }
|
|
|
1145
|
|
|
1146 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
|
1147 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1148 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1149 Determined by whether the first character of the documentation
|
|
|
1150 for the variable is `*'.
|
|
|
1151 */
|
|
|
1152 (variable))
|
|
|
1153 {
|
|
|
1154 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1155
|
|
|
1156 return
|
|
|
1157 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1158
|
|
|
1159 (STRINGP (documentation) &&
|
|
|
1160 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1161
|
|
|
1162 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1163 (CONSP (documentation)
|
|
|
1164 && STRINGP (XCAR (documentation))
|
|
|
1165 && INTP (XCDR (documentation))
|
|
|
1166 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1167 Qt : Qnil;
|
|
|
1168 }
|
|
|
1169
|
|
|
1170 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
|
1171 Return result of expanding macros at top level of FORM.
|
|
|
1172 If FORM is not a macro call, it is returned unchanged.
|
|
|
1173 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1174 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1175
|
|
|
1176 The second optional arg ENVIRONMENT species an environment of macro
|
|
|
1177 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
|
1178 */
|
|
|
1179 (form, env))
|
|
|
1180 {
|
|
|
1181 /* This function can GC */
|
|
|
1182 /* With cleanups from Hallvard Furuseth. */
|
|
|
1183 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1184
|
|
|
1185 while (1)
|
|
|
1186 {
|
|
|
1187 /* Come back here each time we expand a macro call,
|
|
|
1188 in case it expands into another macro call. */
|
|
|
1189 if (!CONSP (form))
|
|
|
1190 break;
|
|
|
1191 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1192 def = sym = XCAR (form);
|
|
|
1193 tem = Qnil;
|
|
|
1194 /* Trace symbols aliases to other symbols
|
|
|
1195 until we get a symbol that is not an alias. */
|
|
|
1196 while (SYMBOLP (def))
|
|
|
1197 {
|
|
|
1198 QUIT;
|
|
|
1199 sym = def;
|
|
|
1200 tem = Fassq (sym, env);
|
|
|
1201 if (NILP (tem))
|
|
|
1202 {
|
|
|
1203 def = XSYMBOL (sym)->function;
|
|
|
1204 if (!UNBOUNDP (def))
|
|
|
1205 continue;
|
|
|
1206 }
|
|
|
1207 break;
|
|
|
1208 }
|
|
|
1209 /* Right now TEM is the result from SYM in ENV,
|
|
|
1210 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1211 if (NILP (tem))
|
|
|
1212 {
|
|
|
1213 /* SYM is not mentioned in ENV.
|
|
|
1214 Look at its function definition. */
|
|
|
1215 if (UNBOUNDP (def)
|
|
|
1216 || !CONSP (def))
|
|
|
1217 /* Not defined or definition not suitable */
|
|
|
1218 break;
|
|
|
1219 if (EQ (XCAR (def), Qautoload))
|
|
|
1220 {
|
|
|
1221 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1222 tem = Felt (def, make_int (4));
|
|
|
1223 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1224 {
|
|
|
1225 /* Yes, load it and try again. */
|
|
|
1226 do_autoload (def, sym);
|
|
|
1227 continue;
|
|
|
1228 }
|
|
|
1229 else
|
|
|
1230 break;
|
|
|
1231 }
|
|
|
1232 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1233 break;
|
|
|
1234 else expander = XCDR (def);
|
|
|
1235 }
|
|
|
1236 else
|
|
|
1237 {
|
|
|
1238 expander = XCDR (tem);
|
|
|
1239 if (NILP (expander))
|
|
|
1240 break;
|
|
|
1241 }
|
|
|
1242 form = apply1 (expander, XCDR (form));
|
|
|
1243 }
|
|
|
1244 return form;
|
|
|
1245 }
|
|
|
1246
|
|
|
1247
|
|
|
1248 /************************************************************************/
|
|
|
1249 /* Non-local exits */
|
|
|
1250 /************************************************************************/
|
|
|
1251
|
|
|
1252 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1253 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1254 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1255 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1256 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1257 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1258 */
|
|
|
1259 (args))
|
|
|
1260 {
|
|
|
1261 /* This function can GC */
|
|
|
1262 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1263 Lisp_Object body = XCDR (args);
|
|
|
1264 return internal_catch (tag, Fprogn, body, 0);
|
|
|
1265 }
|
|
|
1266
|
|
|
1267 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1268 FUNC should return a Lisp_Object.
|
|
|
1269 This is how catches are done from within C code. */
|
|
|
1270
|
|
|
1271 Lisp_Object
|
|
|
1272 internal_catch (Lisp_Object tag,
|
|
|
1273 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1274 Lisp_Object arg,
|
|
|
1275 int * volatile threw)
|
|
|
1276 {
|
|
|
1277 /* This structure is made part of the chain `catchlist'. */
|
|
|
1278 struct catchtag c;
|
|
|
1279
|
|
|
1280 /* Fill in the components of c, and put it on the list. */
|
|
|
1281 c.next = catchlist;
|
|
|
1282 c.tag = tag;
|
|
|
1283 c.val = Qnil;
|
|
|
1284 c.backlist = backtrace_list;
|
|
|
1285 #if 0 /* FSFmacs */
|
|
|
1286 /* #### */
|
|
|
1287 c.handlerlist = handlerlist;
|
|
|
1288 #endif
|
|
|
1289 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1290 c.pdlcount = specpdl_depth();
|
|
|
1291 #if 0 /* FSFmacs */
|
|
|
1292 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1293 #endif
|
|
|
1294 c.gcpro = gcprolist;
|
|
|
1295 catchlist = &c;
|
|
|
1296
|
|
|
1297 /* Call FUNC. */
|
|
|
1298 if (SETJMP (c.jmp))
|
|
|
1299 {
|
|
|
1300 /* Throw works by a longjmp that comes right here. */
|
|
|
1301 if (threw) *threw = 1;
|
|
|
1302 return c.val;
|
|
|
1303 }
|
|
|
1304 c.val = (*func) (arg);
|
|
|
1305 if (threw) *threw = 0;
|
|
|
1306 catchlist = c.next;
|
|
|
1307 return c.val;
|
|
|
1308 }
|
|
|
1309
|
|
|
1310
|
|
|
1311 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1312 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1313
|
|
|
1314 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1315 they choose the catch tag to throw to. A catch tag for a
|
|
|
1316 condition-case form has a TAG of Qnil.
|
|
|
1317
|
|
|
1318 Before each catch is discarded, unbind all special bindings and
|
|
|
1319 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1320 the handler stack as we go, so that the proper handlers are in
|
|
|
1321 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1322 some static info saved in CATCH, and longjmp to the location
|
|
|
1323 specified in the
|
|
|
1324
|
|
|
1325 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1326
|
|
|
1327 static void
|
|
|
1328 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1329 {
|
|
|
1330 #if 0 /* FSFmacs */
|
|
|
1331 /* #### */
|
|
|
1332 REGISTER int last_time;
|
|
|
1333 #endif
|
|
|
1334
|
|
|
1335 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1336 Before each catch is discarded, unbind all special bindings
|
|
|
1337 and execute all unwind-protect clauses made above that catch.
|
|
|
1338 At the end, restore some static info saved in CATCH,
|
|
|
1339 and longjmp to the location specified.
|
|
|
1340 */
|
|
|
1341
|
|
|
1342 /* Save the value somewhere it will be GC'ed.
|
|
|
1343 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1344 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1345 c->val = val;
|
|
|
1346
|
|
|
1347 #if 0 /* FSFmacs */
|
|
|
1348 /* Restore the polling-suppression count. */
|
|
|
1349 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1350 #endif
|
|
|
1351
|
|
|
1352 #if 0 /* FSFmacs */
|
|
|
1353 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1354 do
|
|
|
1355 {
|
|
|
1356 last_time = catchlist == c;
|
|
|
1357
|
|
|
1358 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1359 handlers. */
|
|
|
1360 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1361 handlerlist = catchlist->handlerlist;
|
|
|
1362 catchlist = catchlist->next;
|
|
|
1363 }
|
|
|
1364 while (! last_time);
|
|
|
1365 #else /* Actual XEmacs code */
|
|
|
1366 /* Unwind the specpdl stack */
|
|
|
1367 unbind_to (c->pdlcount, Qnil);
|
|
|
1368 catchlist = c->next;
|
|
|
1369 #endif
|
|
|
1370
|
|
|
1371 gcprolist = c->gcpro;
|
|
|
1372 backtrace_list = c->backlist;
|
|
|
1373 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1374
|
|
|
1375 #if 0 /* no longer used */
|
|
|
1376 throw_level = 0;
|
|
|
1377 #endif
|
|
|
1378 LONGJMP (c->jmp, 1);
|
|
|
1379 }
|
|
|
1380
|
|
|
1381 static DOESNT_RETURN
|
|
|
1382 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1383 Lisp_Object sig, Lisp_Object data)
|
|
|
1384 {
|
|
|
1385 #if 0
|
|
|
1386 /* die if we recurse more than is reasonable */
|
|
|
1387 if (++throw_level > 20)
|
|
|
1388 abort();
|
|
|
1389 #endif
|
|
|
1390
|
|
|
1391 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1392 "last resort" when there is no handler for this error and
|
|
|
1393 the debugger couldn't be invoked, so we are throwing to
|
|
|
1394 'top-level. If this tag doesn't exist (happens during the
|
|
|
1395 initialization stages) we would get in an infinite recursive
|
|
|
1396 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1397 really-early-error-handler.
|
|
|
1398
|
|
|
1399 Note that in fact the only time that the "last resort"
|
|
|
1400 occurs is when there's no catch for 'top-level -- the
|
|
|
1401 'top-level catch and the catch-all error handler are
|
|
|
1402 established at the same time, in initial_command_loop/
|
|
|
1403 top_level_1.
|
|
|
1404
|
|
|
1405 #### Fix this horrifitude!
|
|
|
1406 */
|
|
|
1407
|
|
|
1408 while (1)
|
|
|
1409 {
|
|
|
1410 REGISTER struct catchtag *c;
|
|
|
1411
|
|
|
1412 #if 0 /* FSFmacs */
|
|
|
1413 if (!NILP (tag)) /* #### */
|
|
|
1414 #endif
|
|
|
1415 for (c = catchlist; c; c = c->next)
|
|
|
1416 {
|
|
|
1417 if (EQ (c->tag, tag))
|
|
|
1418 unwind_to_catch (c, val);
|
|
|
1419 }
|
|
|
1420 if (!bomb_out_p)
|
|
|
1421 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1422 else
|
|
|
1423 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1424 }
|
|
|
1425
|
|
|
1426 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1427 /* throw_level--; */
|
|
|
1428 /* getting tired of compilation warnings */
|
|
|
1429 /* return Qnil; */
|
|
|
1430 }
|
|
|
1431
|
|
|
1432 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1433 Fthrow() works.
|
|
|
1434
|
|
|
1435 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1436 back to the appropriate condition-case handler after (maybe)
|
|
|
1437 the debugger is entered. In that case, TAG is the value
|
|
|
1438 of Vcondition_handlers that was in place just after the
|
|
|
1439 condition-case handler was set up. The car of this will be
|
|
|
1440 some data referring to the handler: Its car will be Qunbound
|
|
|
1441 (thus, this tag can never be generated by Lisp code), and
|
|
|
1442 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1443 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1444 This works fine because Fthrow() does not care what TAG was
|
|
|
1445 passed to it: it just looks up the catch list for something
|
|
|
1446 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1447 back to the place that established the catch (in this case,
|
|
|
1448 condition_case_1). See below for more info.
|
|
|
1449 */
|
|
|
1450
|
|
|
1451 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
|
1452 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
|
1453 Both TAG and VALUE are evalled.
|
|
|
1454 */
|
|
|
1455 (tag, val))
|
|
|
1456 {
|
|
|
1457 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1458 return Qnil;
|
|
|
1459 }
|
|
|
1460
|
|
|
1461 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1462 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1463 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1464 If BODYFORM completes normally, its value is returned
|
|
|
1465 after executing the UNWINDFORMS.
|
|
|
1466 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1467 */
|
|
|
1468 (args))
|
|
|
1469 {
|
|
|
1470 /* This function can GC */
|
|
|
1471 int speccount = specpdl_depth();
|
|
|
1472
|
|
|
1473 record_unwind_protect (Fprogn, XCDR (args));
|
|
|
1474 return unbind_to (speccount, Feval (XCAR (args)));
|
|
|
1475 }
|
|
|
1476
|
|
|
1477
|
|
|
1478 /************************************************************************/
|
|
|
1479 /* Signalling and trapping errors */
|
|
|
1480 /************************************************************************/
|
|
|
1481
|
|
|
1482 static Lisp_Object
|
|
|
1483 condition_bind_unwind (Lisp_Object loser)
|
|
|
1484 {
|
|
|
1485 struct Lisp_Cons *victim;
|
|
|
1486 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1487 Lisp_Object tem = XCAR (loser);
|
|
|
1488
|
|
|
1489 while (CONSP (tem))
|
|
|
1490 {
|
|
|
1491 victim = XCONS (tem);
|
|
|
1492 tem = victim->cdr;
|
|
|
1493 free_cons (victim);
|
|
|
1494 }
|
|
|
1495 victim = XCONS (loser);
|
|
|
1496
|
|
|
1497 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1498 Vcondition_handlers = victim->cdr;
|
|
|
1499
|
|
|
1500 free_cons (victim);
|
|
|
1501 return Qnil;
|
|
|
1502 }
|
|
|
1503
|
|
|
1504 static Lisp_Object
|
|
|
1505 condition_case_unwind (Lisp_Object loser)
|
|
|
1506 {
|
|
|
1507 struct Lisp_Cons *victim;
|
|
|
1508
|
|
|
1509 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1510 victim = XCONS (XCAR (loser));
|
|
|
1511 free_cons (victim);
|
|
|
1512
|
|
|
1513 victim = XCONS (loser);
|
|
|
1514 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1515 Vcondition_handlers = victim->cdr;
|
|
|
1516
|
|
|
1517 free_cons (victim);
|
|
|
1518 return Qnil;
|
|
|
1519 }
|
|
|
1520
|
|
|
1521 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1522 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1523
|
|
|
1524 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1525 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1526 HANDLERS as something to be caught, the return value of this
|
|
|
1527 function is the return value from BFUN. If such an error does
|
|
|
1528 occur, HFUN is called, and its return value becomes the
|
|
|
1529 return value of condition_case_1(). The second argument passed
|
|
|
1530 to HFUN will always be HARG. The first argument depends on
|
|
|
1531 HANDLERS:
|
|
|
1532
|
|
|
1533 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1534 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1535 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1536 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1537 `debug-on-error' was set.
|
|
|
1538
|
|
|
1539 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1540 debugger is invoked if `debug-on-error' was set.
|
|
|
1541
|
|
|
1542 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1543 exactly as in `condition-case', and errors will be trapped
|
|
|
1544 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1545 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1546 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1547
|
|
|
1548 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1549 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1550 for why), establishes a catch whose tag is this new value of
|
|
|
1551 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1552 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1553 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1554 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1555 jump point we just established, and we in turn just call the
|
|
|
1556 HFUN and return its value.
|
|
|
1557
|
|
|
1558 For a real condition-case, HFUN will always be
|
|
|
1559 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1560 to condition-case. That function just binds VAR to the cons
|
|
|
1561 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1562 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1563 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1564 it had *before* condition_case_1() was called. This maintains
|
|
|
1565 consistency (so that the state of things at exit of
|
|
|
1566 condition_case_1() is the same as at entry), and implies
|
|
|
1567 that the handler can signal the same error again (possibly
|
|
|
1568 after processing of its own), without getting in an infinite
|
|
|
1569 loop. */
|
|
|
1570
|
|
|
1571 Lisp_Object
|
|
|
1572 condition_case_1 (Lisp_Object handlers,
|
|
|
1573 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1574 Lisp_Object barg,
|
|
|
1575 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1576 Lisp_Object harg)
|
|
|
1577 {
|
|
|
1578 int speccount = specpdl_depth();
|
|
|
1579 struct catchtag c;
|
|
|
1580 struct gcpro gcpro1;
|
|
|
1581
|
|
|
1582 #if 0 /* FSFmacs */
|
|
|
1583 c.tag = Qnil;
|
|
|
1584 #else
|
|
|
1585 /* Do consing now so out-of-memory error happens up front */
|
|
|
1586 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1587 which is known specially by Fsignal.
|
|
|
1588 This is an abomination, but to fix it would require either
|
|
|
1589 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1590 or changing the byte-compiler output (no thanks). */
|
|
|
1591 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1592 Vcondition_handlers);
|
|
|
1593 #endif
|
|
|
1594 c.val = Qnil;
|
|
|
1595 c.backlist = backtrace_list;
|
|
|
1596 #if 0 /* FSFmacs */
|
|
|
1597 /* #### */
|
|
|
1598 c.handlerlist = handlerlist;
|
|
|
1599 #endif
|
|
|
1600 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1601 c.pdlcount = specpdl_depth();
|
|
|
1602 #if 0 /* FSFmacs */
|
|
|
1603 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1604 #endif
|
|
|
1605 c.gcpro = gcprolist;
|
|
|
1606 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1607 c.next = catchlist;
|
|
|
1608
|
|
|
1609 if (SETJMP (c.jmp))
|
|
|
1610 {
|
|
|
1611 /* throw does ungcpro, etc */
|
|
|
1612 return (*hfun) (c.val, harg);
|
|
|
1613 }
|
|
|
1614
|
|
|
1615 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1616
|
|
|
1617 catchlist = &c;
|
|
|
1618 #if 0 /* FSFmacs */
|
|
|
1619 h.handler = handlers;
|
|
|
1620 h.var = Qnil;
|
|
|
1621 h.next = handlerlist;
|
|
|
1622 h.tag = &c;
|
|
|
1623 handlerlist = &h;
|
|
|
1624 #else
|
|
|
1625 Vcondition_handlers = c.tag;
|
|
|
1626 #endif
|
|
|
1627 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1628
|
|
|
1629 c.val = ((*bfun) (barg));
|
|
|
1630
|
|
|
1631 /* The following is *not* true: (ben)
|
|
|
1632
|
|
|
1633 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1634 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1635 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1636 UNGCPRO;
|
|
|
1637 catchlist = c.next;
|
|
|
1638 Vcondition_handlers = XCDR (c.tag);
|
|
|
1639
|
|
|
1640 return unbind_to (speccount, c.val);
|
|
|
1641 }
|
|
|
1642
|
|
|
1643 static Lisp_Object
|
|
|
1644 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1645 {
|
|
|
1646 /* This function can GC */
|
|
|
1647 #if 0 /* FSFmacs */
|
|
|
1648 if (!NILP (h.var))
|
|
|
1649 specbind (h.var, c.val);
|
|
|
1650 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1651
|
|
|
1652 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1653 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1654 throwing. */
|
|
|
1655 unbind_to (c.pdlcount, Qnil);
|
|
|
1656 return val;
|
|
|
1657 #else
|
|
|
1658 int speccount;
|
|
|
1659
|
|
|
1660 CHECK_TRUE_LIST (val);
|
|
|
1661 if (NILP (var))
|
|
|
1662 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1663
|
|
|
1664 speccount = specpdl_depth();
|
|
|
1665 specbind (var, Fcar (val));
|
|
|
1666 val = Fprogn (Fcdr (val));
|
|
|
1667 return unbind_to (speccount, val);
|
|
|
1668 #endif
|
|
|
1669 }
|
|
|
1670
|
|
|
1671 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1672 condition-case except that it takes three arguments rather
|
|
|
1673 than a single list of arguments. */
|
|
|
1674 Lisp_Object
|
|
|
1675 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1676 {
|
|
|
1677 /* This function can GC */
|
|
|
1678 Lisp_Object handler;
|
|
|
1679
|
|
|
1680 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1681 {
|
|
|
1682 if (NILP (handler))
|
|
|
1683 ;
|
|
|
1684 else if (CONSP (handler))
|
|
|
1685 {
|
|
|
1686 Lisp_Object conditions = XCAR (handler);
|
|
|
1687 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1688 if (SYMBOLP (conditions))
|
|
|
1689 ;
|
|
|
1690 else
|
|
|
1691 {
|
|
|
1692 Lisp_Object condition;
|
|
|
1693 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1694 if (!SYMBOLP (condition))
|
|
|
1695 goto invalid_condition_handler;
|
|
|
1696 }
|
|
|
1697 }
|
|
|
1698 else
|
|
|
1699 {
|
|
|
1700 invalid_condition_handler:
|
|
|
1701 signal_simple_error ("Invalid condition handler", handler);
|
|
|
1702 }
|
|
|
1703 }
|
|
|
1704
|
|
|
1705 CHECK_SYMBOL (var);
|
|
|
1706
|
|
|
1707 return condition_case_1 (handlers,
|
|
|
1708 Feval, bodyform,
|
|
|
1709 run_condition_case_handlers,
|
|
|
1710 var);
|
|
|
1711 }
|
|
|
1712
|
|
|
1713 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
1714 Regain control when an error is signalled.
|
|
|
1715 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1716 Executes BODYFORM and returns its value if no error happens.
|
|
|
1717 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1718 where the BODY is made of Lisp expressions.
|
|
|
1719
|
|
|
1720 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1721 error's condition names. If an error happens, the first applicable
|
|
|
1722 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1723 all errors, even those without the `error' condition name on them
|
|
|
1724 \(e.g. `quit').
|
|
|
1725
|
|
|
1726 The car of a handler may be a list of condition names
|
|
|
1727 instead of a single condition name.
|
|
|
1728
|
|
|
1729 When a handler handles an error,
|
|
|
1730 control returns to the condition-case and the handler BODY... is executed
|
|
|
1731 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1732 VAR may be nil; then you do not get access to the signal information.
|
|
|
1733
|
|
|
1734 The value of the last BODY form is returned from the condition-case.
|
|
|
1735 See also the function `signal' for more info.
|
|
|
1736
|
|
|
1737 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1738 and the current catches, condition-cases, and bindings have all been
|
|
|
1739 popped back to the state they were in just before the call to
|
|
|
1740 `condition-case'. This means that resignalling the error from
|
|
|
1741 within the handler will not result in an infinite loop.
|
|
|
1742
|
|
|
1743 If you want to establish an error handler that is called with the
|
|
|
1744 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1745 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
1746 */
|
|
|
1747 (args))
|
|
|
1748 {
|
|
|
1749 /* This function can GC */
|
|
|
1750 Lisp_Object var = XCAR (args);
|
|
|
1751 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1752 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1753 return condition_case_3 (bodyform, var, handlers);
|
|
|
1754 }
|
|
|
1755
|
|
|
1756 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
1757 Regain control when an error is signalled, without popping the stack.
|
|
|
1758 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1759 This function is similar to `condition-case', but the handler is invoked
|
|
|
1760 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1761 that was current when `signal' was called, rather than when the handler
|
|
|
1762 was established.
|
|
|
1763
|
|
|
1764 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
1765 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
1766 `signal' is called (this differs from `condition-case', which allows
|
|
|
1767 you to specify which errors are trapped). If the handler function
|
|
|
1768 returns, `signal' continues as if the handler were never invoked.
|
|
|
1769 \(It continues to look for handlers established earlier than this one,
|
|
|
1770 and invokes the standard error-handler if none is found.)
|
|
|
1771 */
|
|
|
1772 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
1773 {
|
|
|
1774 /* This function can GC */
|
|
|
1775 int speccount = specpdl_depth();
|
|
|
1776 Lisp_Object tem;
|
|
|
1777
|
|
|
1778 /* #### If there were a way to check that args[0] were a function
|
|
|
1779 which accepted one arg, that should be done here ... */
|
|
|
1780
|
|
|
1781 /* (handler-fun . handler-args) */
|
|
|
1782 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1783 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1784 Vcondition_handlers = tem;
|
|
|
1785
|
|
|
1786 /* Caller should have GC-protected args */
|
|
|
1787 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
|
1788 }
|
|
|
1789
|
|
|
1790 static int
|
|
|
1791 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1792 {
|
|
|
1793 if (EQ (type, Qt))
|
|
|
1794 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1795 * Use with caution! */
|
|
|
1796 return 1;
|
|
|
1797
|
|
|
1798 if (SYMBOLP (type))
|
|
|
1799 return !NILP (Fmemq (type, conditions));
|
|
|
1800
|
|
|
1801 for (; CONSP (type); type = XCDR (type))
|
|
|
1802 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1803 return 1;
|
|
|
1804
|
|
|
1805 return 0;
|
|
|
1806 }
|
|
|
1807
|
|
|
1808 static Lisp_Object
|
|
|
1809 return_from_signal (Lisp_Object value)
|
|
|
1810 {
|
|
|
1811 #if 1
|
|
|
1812 /* Most callers are not prepared to handle gc if this
|
|
|
1813 returns. So, since this feature is not very useful,
|
|
|
1814 take it out. */
|
|
|
1815 /* Have called debugger; return value to signaller */
|
|
|
1816 return value;
|
|
|
1817 #else /* But the reality is that that stinks, because: */
|
|
|
1818 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1819 to be continuable!! */
|
|
|
1820 error ("Returning a value from an error is no longer supported");
|
|
|
1821 #endif
|
|
|
1822 }
|
|
|
1823
|
|
|
1824 extern int in_display;
|
|
|
1825
|
|
|
1826
|
|
|
1827 /************************************************************************/
|
|
|
1828 /* the workhorse error-signaling function */
|
|
|
1829 /************************************************************************/
|
|
|
1830
|
|
|
1831 /* #### This function has not been synched with FSF. It diverges
|
|
|
1832 significantly. */
|
|
|
1833
|
|
|
1834 static Lisp_Object
|
|
|
1835 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1836 {
|
|
|
1837 /* This function can GC */
|
|
|
1838 struct gcpro gcpro1, gcpro2;
|
|
|
1839 Lisp_Object conditions;
|
|
|
1840 Lisp_Object handlers;
|
|
|
1841 /* signal_call_debugger() could get called more than once
|
|
|
1842 (once when a call-with-condition-handler is about to
|
|
|
1843 be dealt with, and another when a condition-case handler
|
|
|
1844 is about to be invoked). So make sure the debugger and/or
|
|
|
1845 stack trace aren't done more than once. */
|
|
|
1846 int stack_trace_displayed = 0;
|
|
|
1847 int debugger_entered = 0;
|
|
|
1848 GCPRO2 (conditions, handlers);
|
|
|
1849
|
|
|
1850 if (!initialized)
|
|
|
1851 {
|
|
|
1852 /* who knows how much has been initialized? Safest bet is
|
|
|
1853 just to bomb out immediately. */
|
|
|
1854 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1855 abort ();
|
|
|
1856 }
|
|
|
1857
|
|
|
1858 if (gc_in_progress || in_display)
|
|
|
1859 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1860 There is no sensible way to handle errors there. */
|
|
|
1861 abort ();
|
|
|
1862
|
|
|
1863 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1864
|
|
|
1865 for (handlers = Vcondition_handlers;
|
|
|
1866 CONSP (handlers);
|
|
|
1867 handlers = XCDR (handlers))
|
|
|
1868 {
|
|
|
1869 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1870 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1871 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1872
|
|
|
1873 if (!UNBOUNDP (handler_fun))
|
|
|
1874 {
|
|
|
1875 /* call-with-condition-handler */
|
|
|
1876 Lisp_Object tem;
|
|
|
1877 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1878 struct gcpro ngcpro1;
|
|
|
1879 NGCPRO1 (all_handlers);
|
|
|
1880 Vcondition_handlers = outer_handlers;
|
|
|
1881
|
|
|
1882 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1883 outer_handlers, 1,
|
|
|
1884 &stack_trace_displayed,
|
|
|
1885 &debugger_entered);
|
|
|
1886 if (!UNBOUNDP (tem))
|
|
|
1887 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1888
|
|
|
1889 tem = Fcons (sig, data);
|
|
|
1890 if (NILP (handler_data))
|
|
|
1891 tem = call1 (handler_fun, tem);
|
|
|
1892 else
|
|
|
1893 {
|
|
|
1894 /* (This code won't be used (for now?).) */
|
|
|
1895 struct gcpro nngcpro1;
|
|
|
1896 Lisp_Object args[3];
|
|
|
1897 NNGCPRO1 (args[0]);
|
|
|
1898 nngcpro1.nvars = 3;
|
|
|
1899 args[0] = handler_fun;
|
|
|
1900 args[1] = tem;
|
|
|
1901 args[2] = handler_data;
|
|
|
1902 nngcpro1.var = args;
|
|
|
1903 tem = Fapply (3, args);
|
|
|
1904 NNUNGCPRO;
|
|
|
1905 }
|
|
|
1906 NUNGCPRO;
|
|
|
1907 #if 0
|
|
|
1908 if (!EQ (tem, Qsignal))
|
|
|
1909 return return_from_signal (tem);
|
|
|
1910 #endif
|
|
|
1911 /* If handler didn't throw, try another handler */
|
|
|
1912 Vcondition_handlers = all_handlers;
|
|
|
1913 }
|
|
|
1914
|
|
|
1915 /* It's a condition-case handler */
|
|
|
1916
|
|
|
1917 /* t is used by handlers for all conditions, set up by C code.
|
|
|
1918 * debugger is not called even if debug_on_error */
|
|
|
1919 else if (EQ (handler_data, Qt))
|
|
|
1920 {
|
|
|
1921 UNGCPRO;
|
|
|
1922 return Fthrow (handlers, Fcons (sig, data));
|
|
|
1923 }
|
|
|
1924 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1925 addition it invokes the debugger if debug_on_error.
|
|
|
1926 This is normally used for the outer command-loop error
|
|
|
1927 handler. */
|
|
|
1928 else if (EQ (handler_data, Qerror))
|
|
|
1929 {
|
|
|
1930 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1931 outer_handlers, 0,
|
|
|
1932 &stack_trace_displayed,
|
|
|
1933 &debugger_entered);
|
|
|
1934
|
|
|
1935 UNGCPRO;
|
|
|
1936 if (!UNBOUNDP (tem))
|
|
|
1937 return return_from_signal (tem);
|
|
|
1938
|
|
|
1939 tem = Fcons (sig, data);
|
|
|
1940 return Fthrow (handlers, tem);
|
|
|
1941 }
|
|
|
1942 else
|
|
|
1943 {
|
|
|
1944 /* handler established by real (Lisp) condition-case */
|
|
|
1945 Lisp_Object h;
|
|
|
1946
|
|
|
1947 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1948 {
|
|
|
1949 Lisp_Object clause = Fcar (h);
|
|
|
1950 Lisp_Object tem = Fcar (clause);
|
|
|
1951
|
|
|
1952 if (condition_type_p (tem, conditions))
|
|
|
1953 {
|
|
|
1954 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1955 outer_handlers, 1,
|
|
|
1956 &stack_trace_displayed,
|
|
|
1957 &debugger_entered);
|
|
|
1958 UNGCPRO;
|
|
|
1959 if (!UNBOUNDP (tem))
|
|
|
1960 return return_from_signal (tem);
|
|
|
1961
|
|
|
1962 /* Doesn't return */
|
|
|
1963 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
|
1964 return Fthrow (handlers, tem);
|
|
|
1965 }
|
|
|
1966 }
|
|
|
1967 }
|
|
|
1968 }
|
|
|
1969
|
|
|
1970 /* If no handler is present now, try to run the debugger,
|
|
|
1971 and if that fails, throw to top level.
|
|
|
1972
|
|
|
1973 #### The only time that no handler is present is during
|
|
|
1974 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1975 there is no 'top-level catch. (That's why the
|
|
|
1976 "bomb-out" hack was added.)
|
|
|
1977
|
|
|
1978 #### Fix this horrifitude!
|
|
|
1979 */
|
|
|
1980 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
1981 &stack_trace_displayed,
|
|
|
1982 &debugger_entered);
|
|
|
1983 UNGCPRO;
|
|
|
1984 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
1985 return Qnil;
|
|
|
1986 }
|
|
|
1987
|
|
|
1988
|
|
|
1989 /****************** Error functions class 1 ******************/
|
|
|
1990
|
|
|
1991 /* Class 1: General functions that signal an error.
|
|
|
1992 These functions take an error type and a list of associated error
|
|
|
1993 data. */
|
|
|
1994
|
|
|
1995 /* The simplest external error function: it would be called
|
|
|
1996 signal_continuable_error() in the terminology below, but it's
|
|
|
1997 Lisp-callable. */
|
|
|
1998
|
|
|
1999 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2000 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2001 An error symbol is a symbol defined using `define-error'.
|
|
|
2002 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2003 If the signal is handled, DATA is made available to the handler.
|
|
|
2004 See also the function `signal-error', and the functions to handle errors:
|
|
|
2005 `condition-case' and `call-with-condition-handler'.
|
|
|
2006
|
|
|
2007 Note that this function can return, if the debugger is invoked and the
|
|
|
2008 user invokes the "return from signal" option.
|
|
|
2009 */
|
|
|
2010 (error_symbol, data))
|
|
|
2011 {
|
|
|
2012 /* Fsignal() is one of these functions that's called all the time
|
|
|
2013 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2014 protect the objects because all sorts of weird stuff could
|
|
|
2015 happen. */
|
|
|
2016
|
|
|
2017 struct gcpro gcpro1;
|
|
|
2018
|
|
|
2019 GCPRO1 (data);
|
|
|
2020 if (!NILP (Vcurrent_error_state))
|
|
|
2021 {
|
|
|
2022 if (!NILP (Vcurrent_warning_class))
|
|
|
2023 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2024 Fcons (error_symbol, data));
|
|
|
2025 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2026 abort (); /* Better not get here! */
|
|
|
2027 }
|
|
|
2028 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2029 }
|
|
|
2030
|
|
|
2031 /* Signal a non-continuable error. */
|
|
|
2032
|
|
|
2033 DOESNT_RETURN
|
|
|
2034 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2035 {
|
|
|
2036 for (;;)
|
|
|
2037 Fsignal (sig, data);
|
|
|
2038 }
|
|
|
2039
|
|
|
2040 static Lisp_Object
|
|
|
2041 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2042 {
|
|
|
2043 Lisp_Object val;
|
|
|
2044 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
|
2045 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2046 kludgy_args + 2, XINT (kludgy_args[1]));
|
|
|
2047 return val;
|
|
|
2048 }
|
|
|
2049
|
|
|
2050 static Lisp_Object
|
|
|
2051 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2052 {
|
|
|
2053 Vcurrent_warning_class = warning_class;
|
|
|
2054 return Qnil;
|
|
|
2055 }
|
|
|
2056
|
|
|
2057 static Lisp_Object
|
|
|
2058 restore_current_error_state (Lisp_Object error_state)
|
|
|
2059 {
|
|
|
2060 Vcurrent_error_state = error_state;
|
|
|
2061 return Qnil;
|
|
|
2062 }
|
|
|
2063
|
|
|
2064 /* Many functions would like to do one of three things if an error
|
|
|
2065 occurs:
|
|
|
2066
|
|
|
2067 (1) signal the error, as usual.
|
|
|
2068 (2) silently fail and return some error value.
|
|
|
2069 (3) do as (2) but issue a warning in the process.
|
|
|
2070
|
|
|
2071 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2072 value and calls maybe_signal_error() and other such functions.
|
|
|
2073 This approach is inherently error-prone and broken. A much
|
|
|
2074 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2075 Wrap this around any function in which you might want errors
|
|
|
2076 to not be errors.
|
|
|
2077 */
|
|
|
2078
|
|
|
2079 Lisp_Object
|
|
|
2080 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
|
2081 Lisp_Object class, Error_behavior errb,
|
|
|
2082 int nargs, ...)
|
|
|
2083 {
|
|
|
2084 va_list vargs;
|
|
|
2085 int speccount;
|
|
|
2086 Lisp_Object kludgy_args[22];
|
|
|
2087 Lisp_Object *args = kludgy_args + 2;
|
|
|
2088 int i;
|
|
|
2089 Lisp_Object no_error;
|
|
|
2090
|
|
|
2091 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2092 assert (!NILP (class));
|
|
|
2093 assert (nargs >= 0 && nargs < 20);
|
|
|
2094
|
|
|
2095 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2096 already trapped, we leave them trapped.)
|
|
|
2097
|
|
|
2098 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2099
|
|
|
2100 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2101 were previously enabled. However, we never change the
|
|
|
2102 warning class from one to another. */
|
|
|
2103 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2104 {
|
|
|
2105 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2106 class = Qnil;
|
|
|
2107 errb = ERROR_ME_NOT;
|
|
|
2108 no_error = Qt;
|
|
|
2109 }
|
|
|
2110 else
|
|
|
2111 no_error = Qnil;
|
|
|
2112
|
|
|
2113 va_start (vargs, nargs);
|
|
|
2114 for (i = 0; i < nargs; i++)
|
|
|
2115 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2116 va_end (vargs);
|
|
|
2117
|
|
|
2118 /* If error-checking is not disabled, just call the function.
|
|
|
2119 It's important not to override disabled error-checking with
|
|
|
2120 enabled error-checking. */
|
|
|
2121
|
|
|
2122 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
2123 {
|
|
|
2124 Lisp_Object val;
|
|
|
2125 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2126 return val;
|
|
|
2127 }
|
|
|
2128
|
|
|
2129 speccount = specpdl_depth();
|
|
|
2130 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2131 {
|
|
|
2132 /* If we're currently calling for no warnings, then make it so.
|
|
|
2133 If we're currently calling for warnings and we weren't
|
|
|
2134 previously, then set our warning class; otherwise, leave
|
|
|
2135 the existing one alone. */
|
|
|
2136 record_unwind_protect (restore_current_warning_class,
|
|
|
2137 Vcurrent_warning_class);
|
|
|
2138 Vcurrent_warning_class = class;
|
|
|
2139 }
|
|
|
2140 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2141 {
|
|
|
2142 record_unwind_protect (restore_current_error_state,
|
|
|
2143 Vcurrent_error_state);
|
|
|
2144 Vcurrent_error_state = no_error;
|
|
|
2145 }
|
|
|
2146
|
|
|
2147 {
|
|
|
2148 int threw;
|
|
|
2149 Lisp_Object the_retval;
|
|
|
2150 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2151 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2152 struct gcpro gcpro1, gcpro2;
|
|
|
2153
|
|
|
2154 GCPRO2 (opaque1, opaque2);
|
|
|
2155 kludgy_args[0] = opaque2;
|
|
|
2156 kludgy_args[1] = make_int (nargs);
|
|
|
2157 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2158 call_with_suspended_errors_1,
|
|
|
2159 opaque1, &threw);
|
|
|
2160 free_opaque_ptr (opaque1);
|
|
|
2161 free_opaque_ptr (opaque2);
|
|
|
2162 UNGCPRO;
|
|
|
2163 /* Use the returned value except in non-local exit, when
|
|
|
2164 RETVAL applies. */
|
|
|
2165 /* Some perverse compilers require the perverse cast below. */
|
|
|
2166 return unbind_to (speccount,
|
|
|
2167 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
|
2168 }
|
|
|
2169 }
|
|
|
2170
|
|
|
2171 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2172 according to ERRB. CLASS is the class of warning and should
|
|
|
2173 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2174 Qresource, etc.). */
|
|
|
2175
|
|
|
2176 void
|
|
|
2177 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2178 Error_behavior errb)
|
|
|
2179 {
|
|
|
2180 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2181 return;
|
|
|
2182 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2183 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2184 else
|
|
|
2185 for (;;)
|
|
|
2186 Fsignal (sig, data);
|
|
|
2187 }
|
|
|
2188
|
|
|
2189 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2190 according to ERRB. */
|
|
|
2191
|
|
|
2192 Lisp_Object
|
|
|
2193 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2194 Lisp_Object class, Error_behavior errb)
|
|
|
2195 {
|
|
|
2196 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2197 return Qnil;
|
|
|
2198 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2199 {
|
|
|
2200 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2201 return Qnil;
|
|
|
2202 }
|
|
|
2203 else
|
|
|
2204 return Fsignal (sig, data);
|
|
|
2205 }
|
|
|
2206
|
|
|
2207
|
|
|
2208 /****************** Error functions class 2 ******************/
|
|
|
2209
|
|
|
2210 /* Class 2: Printf-like functions that signal an error.
|
|
|
2211 These functions signal an error of type Qerror, whose data
|
|
|
2212 is a single string, created using the arguments. */
|
|
|
2213
|
|
|
2214 /* dump an error message; called like printf */
|
|
|
2215
|
|
|
2216 DOESNT_RETURN
|
|
|
2217 error (CONST char *fmt, ...)
|
|
|
2218 {
|
|
|
2219 Lisp_Object obj;
|
|
|
2220 va_list args;
|
|
|
2221
|
|
|
2222 va_start (args, fmt);
|
|
|
2223 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2224 args);
|
|
|
2225 va_end (args);
|
|
|
2226
|
|
|
2227 /* Fsignal GC-protects its args */
|
|
|
2228 signal_error (Qerror, list1 (obj));
|
|
|
2229 }
|
|
|
2230
|
|
|
2231 void
|
|
|
2232 maybe_error (Lisp_Object class, Error_behavior errb, CONST char *fmt, ...)
|
|
|
2233 {
|
|
|
2234 Lisp_Object obj;
|
|
|
2235 va_list args;
|
|
|
2236
|
|
|
2237 /* Optimization: */
|
|
|
2238 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2239 return;
|
|
|
2240
|
|
|
2241 va_start (args, fmt);
|
|
|
2242 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2243 args);
|
|
|
2244 va_end (args);
|
|
|
2245
|
|
|
2246 /* Fsignal GC-protects its args */
|
|
|
2247 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2248 }
|
|
|
2249
|
|
|
2250 Lisp_Object
|
|
|
2251 continuable_error (CONST char *fmt, ...)
|
|
|
2252 {
|
|
|
2253 Lisp_Object obj;
|
|
|
2254 va_list args;
|
|
|
2255
|
|
|
2256 va_start (args, fmt);
|
|
|
2257 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2258 args);
|
|
|
2259 va_end (args);
|
|
|
2260
|
|
|
2261 /* Fsignal GC-protects its args */
|
|
|
2262 return Fsignal (Qerror, list1 (obj));
|
|
|
2263 }
|
|
|
2264
|
|
|
2265 Lisp_Object
|
|
|
2266 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
|
2267 CONST char *fmt, ...)
|
|
|
2268 {
|
|
|
2269 Lisp_Object obj;
|
|
|
2270 va_list args;
|
|
|
2271
|
|
|
2272 /* Optimization: */
|
|
|
2273 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2274 return Qnil;
|
|
|
2275
|
|
|
2276 va_start (args, fmt);
|
|
|
2277 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2278 args);
|
|
|
2279 va_end (args);
|
|
|
2280
|
|
|
2281 /* Fsignal GC-protects its args */
|
|
|
2282 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2283 }
|
|
|
2284
|
|
|
2285
|
|
|
2286 /****************** Error functions class 3 ******************/
|
|
|
2287
|
|
|
2288 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2289 These functions signal an error of type Qerror, whose data
|
|
|
2290 is two objects, a string and a related Lisp object (usually the object
|
|
|
2291 where the error is occurring). */
|
|
|
2292
|
|
|
2293 DOESNT_RETURN
|
|
|
2294 signal_simple_error (CONST char *reason, Lisp_Object frob)
|
|
|
2295 {
|
|
|
2296 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2297 }
|
|
|
2298
|
|
|
2299 void
|
|
|
2300 maybe_signal_simple_error (CONST char *reason, Lisp_Object frob,
|
|
|
2301 Lisp_Object class, Error_behavior errb)
|
|
|
2302 {
|
|
|
2303 /* Optimization: */
|
|
|
2304 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2305 return;
|
|
|
2306 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2307 class, errb);
|
|
|
2308 }
|
|
|
2309
|
|
|
2310 Lisp_Object
|
|
|
2311 signal_simple_continuable_error (CONST char *reason, Lisp_Object frob)
|
|
|
2312 {
|
|
|
2313 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2314 }
|
|
|
2315
|
|
|
2316 Lisp_Object
|
|
|
2317 maybe_signal_simple_continuable_error (CONST char *reason, Lisp_Object frob,
|
|
|
2318 Lisp_Object class, Error_behavior errb)
|
|
|
2319 {
|
|
|
2320 /* Optimization: */
|
|
|
2321 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2322 return Qnil;
|
|
|
2323 return maybe_signal_continuable_error
|
|
|
2324 (Qerror, list2 (build_translated_string (reason),
|
|
|
2325 frob), class, errb);
|
|
|
2326 }
|
|
|
2327
|
|
|
2328
|
|
|
2329 /****************** Error functions class 4 ******************/
|
|
|
2330
|
|
|
2331 /* Class 4: Printf-like functions that signal an error.
|
|
|
2332 These functions signal an error of type Qerror, whose data
|
|
|
2333 is a two objects, a string (created using the arguments) and a
|
|
|
2334 Lisp object.
|
|
|
2335 */
|
|
|
2336
|
|
|
2337 DOESNT_RETURN
|
|
|
2338 error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2339 {
|
|
|
2340 Lisp_Object obj;
|
|
|
2341 va_list args;
|
|
|
2342
|
|
|
2343 va_start (args, fmt);
|
|
|
2344 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2345 args);
|
|
|
2346 va_end (args);
|
|
|
2347
|
|
|
2348 /* Fsignal GC-protects its args */
|
|
|
2349 signal_error (Qerror, list2 (obj, frob));
|
|
|
2350 }
|
|
|
2351
|
|
|
2352 void
|
|
|
2353 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2354 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2355 {
|
|
|
2356 Lisp_Object obj;
|
|
|
2357 va_list args;
|
|
|
2358
|
|
|
2359 /* Optimization: */
|
|
|
2360 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2361 return;
|
|
|
2362
|
|
|
2363 va_start (args, fmt);
|
|
|
2364 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2365 args);
|
|
|
2366 va_end (args);
|
|
|
2367
|
|
|
2368 /* Fsignal GC-protects its args */
|
|
|
2369 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2370 }
|
|
|
2371
|
|
|
2372 Lisp_Object
|
|
|
2373 continuable_error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2374 {
|
|
|
2375 Lisp_Object obj;
|
|
|
2376 va_list args;
|
|
|
2377
|
|
|
2378 va_start (args, fmt);
|
|
|
2379 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2380 args);
|
|
|
2381 va_end (args);
|
|
|
2382
|
|
|
2383 /* Fsignal GC-protects its args */
|
|
|
2384 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2385 }
|
|
|
2386
|
|
|
2387 Lisp_Object
|
|
|
2388 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2389 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2390 {
|
|
|
2391 Lisp_Object obj;
|
|
|
2392 va_list args;
|
|
|
2393
|
|
|
2394 /* Optimization: */
|
|
|
2395 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2396 return Qnil;
|
|
|
2397
|
|
|
2398 va_start (args, fmt);
|
|
|
2399 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2400 args);
|
|
|
2401 va_end (args);
|
|
|
2402
|
|
|
2403 /* Fsignal GC-protects its args */
|
|
|
2404 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2405 class, errb);
|
|
|
2406 }
|
|
|
2407
|
|
|
2408
|
|
|
2409 /****************** Error functions class 5 ******************/
|
|
|
2410
|
|
|
2411 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2412 These functions signal an error of type Qerror, whose data
|
|
|
2413 is three objects, a string and two related Lisp objects. */
|
|
|
2414
|
|
|
2415 DOESNT_RETURN
|
|
|
2416 signal_simple_error_2 (CONST char *reason,
|
|
|
2417 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2418 {
|
|
|
2419 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2420 frob1));
|
|
|
2421 }
|
|
|
2422
|
|
|
2423 void
|
|
|
2424 maybe_signal_simple_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2425 Lisp_Object frob1, Lisp_Object class,
|
|
|
2426 Error_behavior errb)
|
|
|
2427 {
|
|
|
2428 /* Optimization: */
|
|
|
2429 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2430 return;
|
|
|
2431 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2432 frob1), class, errb);
|
|
|
2433 }
|
|
|
2434
|
|
|
2435
|
|
|
2436 Lisp_Object
|
|
|
2437 signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2438 Lisp_Object frob1)
|
|
|
2439 {
|
|
|
2440 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2441 frob1));
|
|
|
2442 }
|
|
|
2443
|
|
|
2444 Lisp_Object
|
|
|
2445 maybe_signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2446 Lisp_Object frob1, Lisp_Object class,
|
|
|
2447 Error_behavior errb)
|
|
|
2448 {
|
|
|
2449 /* Optimization: */
|
|
|
2450 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2451 return Qnil;
|
|
|
2452 return maybe_signal_continuable_error
|
|
|
2453 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2454 frob1),
|
|
|
2455 class, errb);
|
|
|
2456 }
|
|
|
2457
|
|
|
2458
|
|
|
2459 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2460 void
|
|
|
2461 signal_quit (void)
|
|
|
2462 {
|
|
|
2463 /* This function can GC */
|
|
|
2464 if (EQ (Vquit_flag, Qcritical))
|
|
|
2465 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2466 Vquit_flag = Qnil;
|
|
|
2467 /* note that this is continuable. */
|
|
|
2468 Fsignal (Qquit, Qnil);
|
|
|
2469 }
|
|
|
2470
|
|
|
2471
|
|
|
2472 /* Used in core lisp functions for efficiency */
|
|
436
|
2473 Lisp_Object
|
|
428
|
2474 signal_void_function_error (Lisp_Object function)
|
|
|
2475 {
|
|
436
|
2476 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2477 }
|
|
|
2478
|
|
436
|
2479 Lisp_Object
|
|
428
|
2480 signal_invalid_function_error (Lisp_Object function)
|
|
|
2481 {
|
|
436
|
2482 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2483 }
|
|
|
2484
|
|
436
|
2485 Lisp_Object
|
|
428
|
2486 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2487 {
|
|
436
|
2488 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2489 list2 (function, make_int (nargs)));
|
|
428
|
2490 }
|
|
|
2491
|
|
|
2492 /* Used in list traversal macros for efficiency. */
|
|
436
|
2493 DOESNT_RETURN
|
|
428
|
2494 signal_malformed_list_error (Lisp_Object list)
|
|
|
2495 {
|
|
436
|
2496 signal_error (Qmalformed_list, list1 (list));
|
|
428
|
2497 }
|
|
|
2498
|
|
436
|
2499 DOESNT_RETURN
|
|
428
|
2500 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2501 {
|
|
436
|
2502 signal_error (Qmalformed_property_list, list1 (list));
|
|
428
|
2503 }
|
|
|
2504
|
|
436
|
2505 DOESNT_RETURN
|
|
428
|
2506 signal_circular_list_error (Lisp_Object list)
|
|
|
2507 {
|
|
436
|
2508 signal_error (Qcircular_list, list1 (list));
|
|
428
|
2509 }
|
|
|
2510
|
|
436
|
2511 DOESNT_RETURN
|
|
428
|
2512 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2513 {
|
|
436
|
2514 signal_error (Qcircular_property_list, list1 (list));
|
|
428
|
2515 }
|
|
|
2516
|
|
|
2517 /************************************************************************/
|
|
|
2518 /* User commands */
|
|
|
2519 /************************************************************************/
|
|
|
2520
|
|
|
2521 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
2522 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
2523 This means it contains a description for how to read arguments to give it.
|
|
|
2524 The value is nil for an invalid function or a symbol with no function
|
|
|
2525 definition.
|
|
|
2526
|
|
|
2527 Interactively callable functions include
|
|
|
2528
|
|
|
2529 -- strings and vectors (treated as keyboard macros)
|
|
|
2530 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2531 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2532 (i.e. the interactive flag)
|
|
|
2533 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2534 value
|
|
|
2535 -- subrs (built-in functions) that are interactively callable
|
|
|
2536
|
|
|
2537 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
2538 */
|
|
|
2539 (function))
|
|
|
2540 {
|
|
|
2541 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2542
|
|
|
2543 if (COMPILED_FUNCTIONP (fun))
|
|
|
2544 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2545
|
|
|
2546 /* Lists may represent commands. */
|
|
|
2547 if (CONSP (fun))
|
|
|
2548 {
|
|
|
2549 Lisp_Object funcar = XCAR (fun);
|
|
|
2550 if (EQ (funcar, Qlambda))
|
|
|
2551 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2552 if (EQ (funcar, Qautoload))
|
|
|
2553 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2554 else
|
|
|
2555 return Qnil;
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2559 interactive spec. */
|
|
|
2560 if (SUBRP (fun))
|
|
|
2561 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2562
|
|
|
2563 /* Strings and vectors are keyboard macros. */
|
|
|
2564 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2565 return Qt;
|
|
|
2566
|
|
|
2567 /* Everything else (including Qunbound) is not a command. */
|
|
|
2568 return Qnil;
|
|
|
2569 }
|
|
|
2570
|
|
|
2571 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
2572 Execute CMD as an editor command.
|
|
|
2573 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2574 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2575 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2576 when reading the arguments.
|
|
|
2577 */
|
|
|
2578 (cmd, record, keys))
|
|
|
2579 {
|
|
|
2580 /* This function can GC */
|
|
|
2581 Lisp_Object prefixarg;
|
|
|
2582 Lisp_Object final = cmd;
|
|
|
2583 struct backtrace backtrace;
|
|
|
2584 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2585
|
|
|
2586 prefixarg = con->prefix_arg;
|
|
|
2587 con->prefix_arg = Qnil;
|
|
|
2588 Vcurrent_prefix_arg = prefixarg;
|
|
|
2589 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2590
|
|
|
2591 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2592 return run_hook (Vdisabled_command_hook);
|
|
|
2593
|
|
|
2594 for (;;)
|
|
|
2595 {
|
|
|
2596 final = indirect_function (cmd, 1);
|
|
|
2597 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2598 do_autoload (final, cmd);
|
|
|
2599 else
|
|
|
2600 break;
|
|
|
2601 }
|
|
|
2602
|
|
|
2603 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2604 {
|
|
|
2605 backtrace.function = &Qcall_interactively;
|
|
|
2606 backtrace.args = &cmd;
|
|
|
2607 backtrace.nargs = 1;
|
|
|
2608 backtrace.evalargs = 0;
|
|
|
2609 backtrace.pdlcount = specpdl_depth();
|
|
|
2610 backtrace.debug_on_exit = 0;
|
|
|
2611 PUSH_BACKTRACE (backtrace);
|
|
|
2612
|
|
|
2613 final = Fcall_interactively (cmd, record, keys);
|
|
|
2614
|
|
|
2615 POP_BACKTRACE (backtrace);
|
|
|
2616 return final;
|
|
|
2617 }
|
|
|
2618 else if (STRINGP (final) || VECTORP (final))
|
|
|
2619 {
|
|
|
2620 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2621 }
|
|
|
2622 else
|
|
|
2623 {
|
|
|
2624 Fsignal (Qwrong_type_argument,
|
|
|
2625 Fcons (Qcommandp,
|
|
|
2626 (EQ (cmd, final)
|
|
|
2627 ? list1 (cmd)
|
|
|
2628 : list2 (cmd, final))));
|
|
|
2629 return Qnil;
|
|
|
2630 }
|
|
|
2631 }
|
|
|
2632
|
|
|
2633 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
2634 Return t if function in which this appears was called interactively.
|
|
|
2635 This means that the function was called with call-interactively (which
|
|
|
2636 includes being called as the binding of a key)
|
|
|
2637 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
2638 */
|
|
|
2639 ())
|
|
|
2640 {
|
|
|
2641 REGISTER struct backtrace *btp;
|
|
|
2642 REGISTER Lisp_Object fun;
|
|
|
2643
|
|
|
2644 if (!INTERACTIVE)
|
|
|
2645 return Qnil;
|
|
|
2646
|
|
|
2647 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2648 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2649 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2650 compiled function. */
|
|
|
2651 btp = backtrace_list;
|
|
|
2652
|
|
|
2653 #if 0 /* FSFmacs */
|
|
|
2654
|
|
|
2655 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2656 out which one is more correct. */
|
|
|
2657 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2658 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2659 fun = Findirect_function (*btp->function);
|
|
|
2660 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2661 btp = btp->next;
|
|
|
2662
|
|
|
2663 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2664 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2665 definition, this function isn't really being called
|
|
|
2666 interactively, but because that's the way Emacs 18 always builds
|
|
|
2667 byte-compiled functions, we'll accept it for now. */
|
|
|
2668 if (EQ (*btp->function, Qbyte_code))
|
|
|
2669 btp = btp->next;
|
|
|
2670
|
|
|
2671 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2672 looking at several frames for special forms. Skip past them. */
|
|
|
2673 while (btp &&
|
|
|
2674 btp->nargs == UNEVALLED)
|
|
|
2675 btp = btp->next;
|
|
|
2676
|
|
|
2677 #else
|
|
|
2678
|
|
|
2679 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2680 btp = btp->next;
|
|
|
2681 for (;
|
|
|
2682 btp && (btp->nargs == UNEVALLED
|
|
|
2683 || EQ (*btp->function, Qbyte_code));
|
|
|
2684 btp = btp->next)
|
|
|
2685 {}
|
|
|
2686 /* btp now points at the frame of the innermost function
|
|
|
2687 that DOES eval its args.
|
|
|
2688 If it is a built-in function (such as load or eval-region)
|
|
|
2689 return nil. */
|
|
|
2690 /* Beats me why this is necessary, but it is */
|
|
|
2691 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2692 return Qt;
|
|
|
2693
|
|
|
2694 #endif
|
|
|
2695
|
|
|
2696 fun = Findirect_function (*btp->function);
|
|
|
2697 if (SUBRP (fun))
|
|
|
2698 return Qnil;
|
|
|
2699 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2700 Return t if that function was called interactively. */
|
|
|
2701 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2702 return Qt;
|
|
|
2703 return Qnil;
|
|
|
2704 }
|
|
|
2705
|
|
|
2706
|
|
|
2707 /************************************************************************/
|
|
|
2708 /* Autoloading */
|
|
|
2709 /************************************************************************/
|
|
|
2710
|
|
|
2711 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
|
2712 Define FUNCTION to autoload from FILE.
|
|
|
2713 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2714 Third arg DOCSTRING is documentation for the function.
|
|
|
2715 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2716 Fifth arg TYPE indicates the type of the object:
|
|
|
2717 nil or omitted says FUNCTION is a function,
|
|
|
2718 `keymap' says FUNCTION is really a keymap, and
|
|
|
2719 `macro' or t says FUNCTION is really a macro.
|
|
|
2720 Third through fifth args give info about the real definition.
|
|
|
2721 They default to nil.
|
|
|
2722 If FUNCTION is already defined other than as an autoload,
|
|
|
2723 this does nothing and returns nil.
|
|
|
2724 */
|
|
|
2725 (function, file, docstring, interactive, type))
|
|
|
2726 {
|
|
|
2727 /* This function can GC */
|
|
|
2728 CHECK_SYMBOL (function);
|
|
|
2729 CHECK_STRING (file);
|
|
|
2730
|
|
|
2731 /* If function is defined and not as an autoload, don't override */
|
|
|
2732 {
|
|
|
2733 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
2734 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
2735 return Qnil;
|
|
|
2736 }
|
|
|
2737
|
|
|
2738 if (purify_flag)
|
|
|
2739 {
|
|
|
2740 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2741 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2742 }
|
|
|
2743
|
|
|
2744 return Ffset (function, Fcons (Qautoload, list4 (file,
|
|
|
2745 docstring,
|
|
|
2746 interactive,
|
|
|
2747 type)));
|
|
|
2748 }
|
|
|
2749
|
|
|
2750 Lisp_Object
|
|
|
2751 un_autoload (Lisp_Object oldqueue)
|
|
|
2752 {
|
|
|
2753 /* This function can GC */
|
|
|
2754 REGISTER Lisp_Object queue, first, second;
|
|
|
2755
|
|
|
2756 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2757 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2758 queue = Vautoload_queue;
|
|
|
2759 Vautoload_queue = oldqueue;
|
|
|
2760 while (CONSP (queue))
|
|
|
2761 {
|
|
|
2762 first = XCAR (queue);
|
|
|
2763 second = Fcdr (first);
|
|
|
2764 first = Fcar (first);
|
|
|
2765 if (NILP (second))
|
|
|
2766 Vfeatures = first;
|
|
|
2767 else
|
|
|
2768 Ffset (first, second);
|
|
|
2769 queue = Fcdr (queue);
|
|
|
2770 }
|
|
|
2771 return Qnil;
|
|
|
2772 }
|
|
|
2773
|
|
|
2774 void
|
|
|
2775 do_autoload (Lisp_Object fundef,
|
|
|
2776 Lisp_Object funname)
|
|
|
2777 {
|
|
|
2778 /* This function can GC */
|
|
|
2779 int speccount = specpdl_depth();
|
|
|
2780 Lisp_Object fun = funname;
|
|
|
2781 struct gcpro gcpro1, gcpro2;
|
|
|
2782
|
|
|
2783 CHECK_SYMBOL (funname);
|
|
|
2784 GCPRO2 (fun, funname);
|
|
|
2785
|
|
|
2786 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2787 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2788 Vautoload_queue = Qt;
|
|
|
2789 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
2790
|
|
|
2791 {
|
|
|
2792 Lisp_Object queue;
|
|
|
2793
|
|
|
2794 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
2795 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
2796 {
|
|
|
2797 Lisp_Object first = XCAR (queue);
|
|
|
2798 Lisp_Object second = Fcdr (first);
|
|
|
2799
|
|
|
2800 first = Fcar (first);
|
|
|
2801
|
|
|
2802 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2803 may be an atom if the autoload entry was generated by a defalias
|
|
|
2804 or fset. */
|
|
|
2805 if (CONSP (second))
|
|
|
2806 Fput (first, Qautoload, (XCDR (second)));
|
|
|
2807 }
|
|
|
2808 }
|
|
|
2809
|
|
|
2810 /* Once loading finishes, don't undo it. */
|
|
|
2811 Vautoload_queue = Qt;
|
|
|
2812 unbind_to (speccount, Qnil);
|
|
|
2813
|
|
|
2814 fun = indirect_function (fun, 0);
|
|
|
2815
|
|
|
2816 #if 0 /* FSFmacs */
|
|
|
2817 if (!NILP (Fequal (fun, fundef)))
|
|
|
2818 #else
|
|
|
2819 if (UNBOUNDP (fun)
|
|
|
2820 || (CONSP (fun)
|
|
|
2821 && EQ (XCAR (fun), Qautoload)))
|
|
|
2822 #endif
|
|
|
2823 error ("Autoloading failed to define function %s",
|
|
|
2824 string_data (XSYMBOL (funname)->name));
|
|
|
2825 UNGCPRO;
|
|
|
2826 }
|
|
|
2827
|
|
|
2828
|
|
|
2829 /************************************************************************/
|
|
|
2830 /* eval, funcall, apply */
|
|
|
2831 /************************************************************************/
|
|
|
2832
|
|
|
2833 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
|
2834 int nargs, Lisp_Object args[]);
|
|
|
2835 static int in_warnings;
|
|
|
2836
|
|
|
2837 static Lisp_Object
|
|
|
2838 in_warnings_restore (Lisp_Object minimus)
|
|
|
2839 {
|
|
|
2840 in_warnings = 0;
|
|
|
2841 return Qnil;
|
|
|
2842 }
|
|
|
2843
|
|
|
2844 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
2845 Evaluate FORM and return its value.
|
|
|
2846 */
|
|
|
2847 (form))
|
|
|
2848 {
|
|
|
2849 /* This function can GC */
|
|
|
2850 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2851 int nargs;
|
|
|
2852 struct backtrace backtrace;
|
|
|
2853
|
|
|
2854 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2855 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2856 {
|
|
|
2857 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2858 int speccount = specpdl_depth();
|
|
|
2859 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2860
|
|
|
2861 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2862 in_warnings = 1;
|
|
|
2863 this_warning_cons = Vpending_warnings;
|
|
|
2864 this_warning = XCAR (this_warning_cons);
|
|
|
2865 /* in case an error occurs in the warn function, at least
|
|
|
2866 it won't happen infinitely */
|
|
|
2867 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2868 free_cons (XCONS (this_warning_cons));
|
|
|
2869 class = XCAR (this_warning);
|
|
|
2870 level = XCAR (XCDR (this_warning));
|
|
|
2871 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2872 free_list (this_warning);
|
|
|
2873
|
|
|
2874 if (NILP (Vpending_warnings))
|
|
|
2875 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2876 but safer */
|
|
|
2877
|
|
|
2878 GCPRO4 (form, class, level, messij);
|
|
|
2879 if (!STRINGP (messij))
|
|
|
2880 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2881 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2882 UNGCPRO;
|
|
|
2883 unbind_to (speccount, Qnil);
|
|
|
2884 }
|
|
|
2885
|
|
|
2886 if (!CONSP (form))
|
|
|
2887 {
|
|
|
2888 if (SYMBOLP (form))
|
|
|
2889 return Fsymbol_value (form);
|
|
|
2890 else
|
|
|
2891 return form;
|
|
|
2892 }
|
|
|
2893
|
|
|
2894 QUIT;
|
|
|
2895 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2896 {
|
|
|
2897 struct gcpro gcpro1;
|
|
|
2898 GCPRO1 (form);
|
|
|
2899 garbage_collect_1 ();
|
|
|
2900 UNGCPRO;
|
|
|
2901 }
|
|
|
2902
|
|
|
2903 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2904 {
|
|
|
2905 if (max_lisp_eval_depth < 100)
|
|
|
2906 max_lisp_eval_depth = 100;
|
|
|
2907 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2908 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2909 }
|
|
|
2910
|
|
|
2911 /* We guaranteed CONSP (form) above */
|
|
|
2912 original_fun = XCAR (form);
|
|
|
2913 original_args = XCDR (form);
|
|
|
2914
|
|
|
2915 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
2916
|
|
|
2917 backtrace.pdlcount = specpdl_depth();
|
|
|
2918 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2919 backtrace.args = &original_args;
|
|
|
2920 backtrace.nargs = UNEVALLED;
|
|
|
2921 backtrace.evalargs = 1;
|
|
|
2922 backtrace.debug_on_exit = 0;
|
|
|
2923 PUSH_BACKTRACE (backtrace);
|
|
|
2924
|
|
|
2925 if (debug_on_next_call)
|
|
|
2926 do_debug_on_call (Qt);
|
|
|
2927
|
|
|
2928 if (profiling_active)
|
|
|
2929 profile_increase_call_count (original_fun);
|
|
|
2930
|
|
|
2931 /* At this point, only original_fun and original_args
|
|
|
2932 have values that will be used below. */
|
|
|
2933 retry:
|
|
|
2934 fun = indirect_function (original_fun, 1);
|
|
|
2935
|
|
|
2936 if (SUBRP (fun))
|
|
|
2937 {
|
|
|
2938 Lisp_Subr *subr = XSUBR (fun);
|
|
|
2939 int max_args = subr->max_args;
|
|
|
2940
|
|
|
2941 if (nargs < subr->min_args)
|
|
|
2942 goto wrong_number_of_arguments;
|
|
|
2943
|
|
|
2944 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
2945 {
|
|
|
2946 backtrace.evalargs = 0;
|
|
|
2947 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
2948 (original_args));
|
|
|
2949 }
|
|
|
2950 else if (nargs <= max_args)
|
|
|
2951 {
|
|
|
2952 struct gcpro gcpro1;
|
|
|
2953 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
2954 REGISTER Lisp_Object *p = args;
|
|
|
2955
|
|
|
2956 GCPRO1 (args[0]);
|
|
|
2957 gcpro1.nvars = 0;
|
|
|
2958
|
|
|
2959 {
|
|
|
2960 REGISTER Lisp_Object arg;
|
|
|
2961 LIST_LOOP_2 (arg, original_args)
|
|
|
2962 {
|
|
|
2963 *p++ = Feval (arg);
|
|
|
2964 gcpro1.nvars++;
|
|
|
2965 }
|
|
|
2966 }
|
|
|
2967
|
|
|
2968 /* &optional args default to nil. */
|
|
|
2969 while (p - args < max_args)
|
|
|
2970 *p++ = Qnil;
|
|
|
2971
|
|
|
2972 backtrace.args = args;
|
|
|
2973 backtrace.nargs = nargs;
|
|
|
2974
|
|
|
2975 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
2976
|
|
|
2977 UNGCPRO;
|
|
|
2978 }
|
|
|
2979 else if (max_args == MANY)
|
|
|
2980 {
|
|
|
2981 /* Pass a vector of evaluated arguments */
|
|
|
2982 struct gcpro gcpro1;
|
|
|
2983 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
2984 REGISTER Lisp_Object *p = args;
|
|
|
2985
|
|
|
2986 GCPRO1 (args[0]);
|
|
|
2987 gcpro1.nvars = 0;
|
|
|
2988
|
|
|
2989 {
|
|
|
2990 REGISTER Lisp_Object arg;
|
|
|
2991 LIST_LOOP_2 (arg, original_args)
|
|
|
2992 {
|
|
|
2993 *p++ = Feval (arg);
|
|
|
2994 gcpro1.nvars++;
|
|
|
2995 }
|
|
|
2996 }
|
|
|
2997
|
|
|
2998 backtrace.args = args;
|
|
|
2999 backtrace.nargs = nargs;
|
|
|
3000
|
|
|
3001 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3002 (nargs, args));
|
|
|
3003
|
|
|
3004 UNGCPRO;
|
|
|
3005 }
|
|
|
3006 else
|
|
|
3007 {
|
|
|
3008 wrong_number_of_arguments:
|
|
436
|
3009 val = signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
3010 }
|
|
|
3011 }
|
|
|
3012 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3013 {
|
|
|
3014 struct gcpro gcpro1;
|
|
|
3015 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3016 REGISTER Lisp_Object *p = args;
|
|
|
3017
|
|
|
3018 GCPRO1 (args[0]);
|
|
|
3019 gcpro1.nvars = 0;
|
|
|
3020
|
|
|
3021 {
|
|
|
3022 REGISTER Lisp_Object arg;
|
|
|
3023 LIST_LOOP_2 (arg, original_args)
|
|
|
3024 {
|
|
|
3025 *p++ = Feval (arg);
|
|
|
3026 gcpro1.nvars++;
|
|
|
3027 }
|
|
|
3028 }
|
|
|
3029
|
|
|
3030 backtrace.args = args;
|
|
|
3031 backtrace.nargs = nargs;
|
|
|
3032 backtrace.evalargs = 0;
|
|
|
3033
|
|
|
3034 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3035
|
|
|
3036 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3037 if (backtrace.debug_on_exit)
|
|
|
3038 val = do_debug_on_exit (val);
|
|
|
3039 /* Don't do it again when we return to eval. */
|
|
|
3040 backtrace.debug_on_exit = 0;
|
|
|
3041
|
|
|
3042 UNGCPRO;
|
|
|
3043 }
|
|
|
3044 else if (CONSP (fun))
|
|
|
3045 {
|
|
|
3046 Lisp_Object funcar = XCAR (fun);
|
|
|
3047
|
|
|
3048 if (EQ (funcar, Qautoload))
|
|
|
3049 {
|
|
|
3050 do_autoload (fun, original_fun);
|
|
|
3051 goto retry;
|
|
|
3052 }
|
|
|
3053 else if (EQ (funcar, Qmacro))
|
|
|
3054 {
|
|
|
3055 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3056 }
|
|
|
3057 else if (EQ (funcar, Qlambda))
|
|
|
3058 {
|
|
|
3059 struct gcpro gcpro1;
|
|
|
3060 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3061 REGISTER Lisp_Object *p = args;
|
|
|
3062
|
|
|
3063 GCPRO1 (args[0]);
|
|
|
3064 gcpro1.nvars = 0;
|
|
|
3065
|
|
|
3066 {
|
|
|
3067 REGISTER Lisp_Object arg;
|
|
|
3068 LIST_LOOP_2 (arg, original_args)
|
|
|
3069 {
|
|
|
3070 *p++ = Feval (arg);
|
|
|
3071 gcpro1.nvars++;
|
|
|
3072 }
|
|
|
3073 }
|
|
|
3074
|
|
|
3075 UNGCPRO;
|
|
|
3076
|
|
|
3077 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3078 backtrace.nargs = nargs;
|
|
|
3079 backtrace.evalargs = 0;
|
|
|
3080
|
|
|
3081 val = funcall_lambda (fun, nargs, args);
|
|
|
3082
|
|
|
3083 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3084 if (backtrace.debug_on_exit)
|
|
|
3085 val = do_debug_on_exit (val);
|
|
|
3086 /* Don't do it again when we return to eval. */
|
|
|
3087 backtrace.debug_on_exit = 0;
|
|
|
3088 }
|
|
|
3089 else
|
|
|
3090 {
|
|
|
3091 goto invalid_function;
|
|
|
3092 }
|
|
|
3093 }
|
|
|
3094 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3095 {
|
|
|
3096 invalid_function:
|
|
436
|
3097 val = signal_invalid_function_error (fun);
|
|
428
|
3098 }
|
|
|
3099
|
|
|
3100 lisp_eval_depth--;
|
|
|
3101 if (backtrace.debug_on_exit)
|
|
|
3102 val = do_debug_on_exit (val);
|
|
|
3103 POP_BACKTRACE (backtrace);
|
|
|
3104 return val;
|
|
|
3105 }
|
|
|
3106
|
|
|
3107
|
|
|
3108 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3109 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3110 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3111 */
|
|
|
3112 (int nargs, Lisp_Object *args))
|
|
|
3113 {
|
|
|
3114 /* This function can GC */
|
|
|
3115 Lisp_Object fun;
|
|
|
3116 Lisp_Object val;
|
|
|
3117 struct backtrace backtrace;
|
|
|
3118 int fun_nargs = nargs - 1;
|
|
|
3119 Lisp_Object *fun_args = args + 1;
|
|
|
3120
|
|
|
3121 QUIT;
|
|
|
3122 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3123 /* Callers should gcpro lexpr args */
|
|
|
3124 garbage_collect_1 ();
|
|
|
3125
|
|
|
3126 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3127 {
|
|
|
3128 if (max_lisp_eval_depth < 100)
|
|
|
3129 max_lisp_eval_depth = 100;
|
|
|
3130 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3131 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3132 }
|
|
|
3133
|
|
|
3134 backtrace.pdlcount = specpdl_depth();
|
|
|
3135 backtrace.function = &args[0];
|
|
|
3136 backtrace.args = fun_args;
|
|
|
3137 backtrace.nargs = fun_nargs;
|
|
|
3138 backtrace.evalargs = 0;
|
|
|
3139 backtrace.debug_on_exit = 0;
|
|
|
3140 PUSH_BACKTRACE (backtrace);
|
|
|
3141
|
|
|
3142 if (debug_on_next_call)
|
|
|
3143 do_debug_on_call (Qlambda);
|
|
|
3144
|
|
|
3145 retry:
|
|
|
3146
|
|
|
3147 fun = args[0];
|
|
|
3148
|
|
|
3149 /* It might be useful to place this *after* all the checks. */
|
|
|
3150 if (profiling_active)
|
|
|
3151 profile_increase_call_count (fun);
|
|
|
3152
|
|
|
3153 /* We could call indirect_function directly, but profiling shows
|
|
|
3154 this is worth optimizing by partially unrolling the loop. */
|
|
|
3155 if (SYMBOLP (fun))
|
|
|
3156 {
|
|
|
3157 fun = XSYMBOL (fun)->function;
|
|
|
3158 if (SYMBOLP (fun))
|
|
|
3159 {
|
|
|
3160 fun = XSYMBOL (fun)->function;
|
|
|
3161 if (SYMBOLP (fun))
|
|
|
3162 fun = indirect_function (fun, 1);
|
|
|
3163 }
|
|
|
3164 }
|
|
|
3165
|
|
|
3166 if (SUBRP (fun))
|
|
|
3167 {
|
|
|
3168 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3169 int max_args = subr->max_args;
|
|
|
3170 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3171
|
|
|
3172 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3173 {
|
|
|
3174 funcall_subr:
|
|
|
3175 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
|
3176 }
|
|
436
|
3177 else if (fun_nargs < subr->min_args)
|
|
|
3178 {
|
|
|
3179 goto wrong_number_of_arguments;
|
|
|
3180 }
|
|
428
|
3181 else if (fun_nargs < max_args)
|
|
|
3182 {
|
|
|
3183 Lisp_Object *p = spacious_args;
|
|
|
3184
|
|
|
3185 /* Default optionals to nil */
|
|
|
3186 while (fun_nargs--)
|
|
|
3187 *p++ = *fun_args++;
|
|
|
3188 while (p - spacious_args < max_args)
|
|
|
3189 *p++ = Qnil;
|
|
|
3190
|
|
|
3191 fun_args = spacious_args;
|
|
|
3192 goto funcall_subr;
|
|
|
3193 }
|
|
|
3194 else if (max_args == MANY)
|
|
|
3195 {
|
|
436
|
3196 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
428
|
3197 }
|
|
|
3198 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3199 {
|
|
|
3200 goto invalid_function;
|
|
|
3201 }
|
|
|
3202 else
|
|
|
3203 {
|
|
|
3204 wrong_number_of_arguments:
|
|
436
|
3205 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3206 }
|
|
|
3207 }
|
|
|
3208 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3209 {
|
|
|
3210 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
|
3211 }
|
|
|
3212 else if (CONSP (fun))
|
|
|
3213 {
|
|
|
3214 Lisp_Object funcar = XCAR (fun);
|
|
|
3215
|
|
|
3216 if (EQ (funcar, Qlambda))
|
|
|
3217 {
|
|
|
3218 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3219 }
|
|
|
3220 else if (EQ (funcar, Qautoload))
|
|
|
3221 {
|
|
|
3222 do_autoload (fun, args[0]);
|
|
|
3223 goto retry;
|
|
|
3224 }
|
|
|
3225 else /* Can't funcall a macro */
|
|
|
3226 {
|
|
|
3227 goto invalid_function;
|
|
|
3228 }
|
|
|
3229 }
|
|
|
3230 else if (UNBOUNDP (fun))
|
|
|
3231 {
|
|
436
|
3232 val = signal_void_function_error (args[0]);
|
|
428
|
3233 }
|
|
|
3234 else
|
|
|
3235 {
|
|
|
3236 invalid_function:
|
|
436
|
3237 val = signal_invalid_function_error (fun);
|
|
428
|
3238 }
|
|
|
3239
|
|
|
3240 lisp_eval_depth--;
|
|
|
3241 if (backtrace.debug_on_exit)
|
|
|
3242 val = do_debug_on_exit (val);
|
|
|
3243 POP_BACKTRACE (backtrace);
|
|
|
3244 return val;
|
|
|
3245 }
|
|
|
3246
|
|
|
3247 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3248 Return t if OBJECT can be called as a function, else nil.
|
|
|
3249 A function is an object that can be applied to arguments,
|
|
|
3250 using for example `funcall' or `apply'.
|
|
|
3251 */
|
|
|
3252 (object))
|
|
|
3253 {
|
|
|
3254 if (SYMBOLP (object))
|
|
|
3255 object = indirect_function (object, 0);
|
|
|
3256
|
|
|
3257 return
|
|
|
3258 (SUBRP (object) ||
|
|
|
3259 COMPILED_FUNCTIONP (object) ||
|
|
|
3260 (CONSP (object) &&
|
|
|
3261 (EQ (XCAR (object), Qlambda) ||
|
|
|
3262 EQ (XCAR (object), Qautoload))))
|
|
|
3263 ? Qt : Qnil;
|
|
|
3264 }
|
|
|
3265
|
|
|
3266 static Lisp_Object
|
|
|
3267 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
3268 {
|
|
|
3269 Lisp_Object orig_function = function;
|
|
|
3270 Lisp_Object arglist;
|
|
|
3271
|
|
|
3272 retry:
|
|
|
3273
|
|
|
3274 if (SYMBOLP (function))
|
|
|
3275 function = indirect_function (function, 1);
|
|
|
3276
|
|
|
3277 if (SUBRP (function))
|
|
|
3278 {
|
|
|
3279 return function_min_args_p ?
|
|
|
3280 Fsubr_min_args (function):
|
|
|
3281 Fsubr_max_args (function);
|
|
|
3282 }
|
|
|
3283 else if (COMPILED_FUNCTIONP (function))
|
|
|
3284 {
|
|
|
3285 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
|
3286 }
|
|
|
3287 else if (CONSP (function))
|
|
|
3288 {
|
|
|
3289 Lisp_Object funcar = XCAR (function);
|
|
|
3290
|
|
|
3291 if (EQ (funcar, Qmacro))
|
|
|
3292 {
|
|
|
3293 function = XCDR (function);
|
|
|
3294 goto retry;
|
|
|
3295 }
|
|
|
3296 else if (EQ (funcar, Qautoload))
|
|
|
3297 {
|
|
|
3298 do_autoload (function, orig_function);
|
|
|
3299 goto retry;
|
|
|
3300 }
|
|
|
3301 else if (EQ (funcar, Qlambda))
|
|
|
3302 {
|
|
|
3303 arglist = Fcar (XCDR (function));
|
|
|
3304 }
|
|
|
3305 else
|
|
|
3306 {
|
|
|
3307 goto invalid_function;
|
|
|
3308 }
|
|
|
3309 }
|
|
|
3310 else
|
|
|
3311 {
|
|
|
3312 invalid_function:
|
|
436
|
3313 return signal_invalid_function_error (function);
|
|
428
|
3314 }
|
|
|
3315
|
|
|
3316 {
|
|
|
3317 int argcount = 0;
|
|
|
3318 Lisp_Object arg;
|
|
|
3319
|
|
|
3320 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3321 {
|
|
|
3322 if (EQ (arg, Qand_optional))
|
|
|
3323 {
|
|
|
3324 if (function_min_args_p)
|
|
|
3325 break;
|
|
|
3326 }
|
|
|
3327 else if (EQ (arg, Qand_rest))
|
|
|
3328 {
|
|
|
3329 if (function_min_args_p)
|
|
|
3330 break;
|
|
|
3331 else
|
|
|
3332 return Qnil;
|
|
|
3333 }
|
|
|
3334 else
|
|
|
3335 {
|
|
|
3336 argcount++;
|
|
|
3337 }
|
|
|
3338 }
|
|
|
3339
|
|
|
3340 return make_int (argcount);
|
|
|
3341 }
|
|
|
3342 }
|
|
|
3343
|
|
|
3344 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3345 Return the number of arguments a function may be called with.
|
|
|
3346 The function may be any form that can be passed to `funcall',
|
|
|
3347 any special form, or any macro.
|
|
|
3348 */
|
|
|
3349 (function))
|
|
|
3350 {
|
|
|
3351 return function_argcount (function, 1);
|
|
|
3352 }
|
|
|
3353
|
|
|
3354 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3355 Return the number of arguments a function may be called with.
|
|
|
3356 The function may be any form that can be passed to `funcall',
|
|
|
3357 any special form, or any macro.
|
|
|
3358 If the function takes an arbitrary number of arguments or is
|
|
|
3359 a built-in special form, nil is returned.
|
|
|
3360 */
|
|
|
3361 (function))
|
|
|
3362 {
|
|
|
3363 return function_argcount (function, 0);
|
|
|
3364 }
|
|
|
3365
|
|
|
3366
|
|
|
3367 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
3368 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
3369 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
3370 */
|
|
|
3371 (int nargs, Lisp_Object *args))
|
|
|
3372 {
|
|
|
3373 /* This function can GC */
|
|
|
3374 Lisp_Object fun = args[0];
|
|
|
3375 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3376 int numargs;
|
|
|
3377 int funcall_nargs;
|
|
|
3378
|
|
|
3379 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
3380
|
|
|
3381 if (numargs == 0)
|
|
|
3382 /* (apply foo 0 1 '()) */
|
|
|
3383 return Ffuncall (nargs - 1, args);
|
|
|
3384 else if (numargs == 1)
|
|
|
3385 {
|
|
|
3386 /* (apply foo 0 1 '(2)) */
|
|
|
3387 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3388 return Ffuncall (nargs, args);
|
|
|
3389 }
|
|
|
3390
|
|
|
3391 /* -1 for function, -1 for spread arg */
|
|
|
3392 numargs = nargs - 2 + numargs;
|
|
|
3393 /* +1 for function */
|
|
|
3394 funcall_nargs = 1 + numargs;
|
|
|
3395
|
|
|
3396 if (SYMBOLP (fun))
|
|
|
3397 fun = indirect_function (fun, 0);
|
|
|
3398
|
|
|
3399 if (SUBRP (fun))
|
|
|
3400 {
|
|
|
3401 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3402 int max_args = subr->max_args;
|
|
|
3403
|
|
|
3404 if (numargs < subr->min_args
|
|
|
3405 || (max_args >= 0 && max_args < numargs))
|
|
|
3406 {
|
|
|
3407 /* Let funcall get the error */
|
|
|
3408 }
|
|
|
3409 else if (max_args > numargs)
|
|
|
3410 {
|
|
|
3411 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3412 by explicitly supplying nil's for optional values */
|
|
|
3413 funcall_nargs += (max_args - numargs);
|
|
|
3414 }
|
|
|
3415 }
|
|
|
3416 else if (UNBOUNDP (fun))
|
|
|
3417 {
|
|
|
3418 /* Let funcall get the error */
|
|
|
3419 fun = args[0];
|
|
|
3420 }
|
|
|
3421
|
|
|
3422 {
|
|
|
3423 REGISTER int i;
|
|
|
3424 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
3425 struct gcpro gcpro1;
|
|
|
3426
|
|
|
3427 GCPRO1 (*funcall_args);
|
|
|
3428 gcpro1.nvars = funcall_nargs;
|
|
|
3429
|
|
|
3430 /* Copy in the unspread args */
|
|
|
3431 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3432 /* Spread the last arg we got. Its first element goes in
|
|
|
3433 the slot that it used to occupy, hence this value of I. */
|
|
|
3434 for (i = nargs - 1;
|
|
|
3435 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3436 i++, spread_arg = XCDR (spread_arg))
|
|
|
3437 {
|
|
|
3438 funcall_args [i] = XCAR (spread_arg);
|
|
|
3439 }
|
|
|
3440 /* Supply nil for optional args (to subrs) */
|
|
|
3441 for (; i < funcall_nargs; i++)
|
|
|
3442 funcall_args[i] = Qnil;
|
|
|
3443
|
|
|
3444
|
|
|
3445 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3446 }
|
|
|
3447 }
|
|
|
3448
|
|
|
3449
|
|
|
3450 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3451 return the result of evaluation. */
|
|
|
3452
|
|
|
3453 static Lisp_Object
|
|
|
3454 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3455 {
|
|
|
3456 /* This function can GC */
|
|
|
3457 Lisp_Object symbol, arglist, body, tail;
|
|
|
3458 int speccount = specpdl_depth();
|
|
|
3459 REGISTER int i = 0;
|
|
|
3460
|
|
|
3461 tail = XCDR (fun);
|
|
|
3462
|
|
|
3463 if (!CONSP (tail))
|
|
|
3464 goto invalid_function;
|
|
|
3465
|
|
|
3466 arglist = XCAR (tail);
|
|
|
3467 body = XCDR (tail);
|
|
|
3468
|
|
|
3469 {
|
|
|
3470 int optional = 0, rest = 0;
|
|
|
3471
|
|
|
3472 EXTERNAL_LIST_LOOP_3 (symbol, arglist, tail)
|
|
|
3473 {
|
|
|
3474 if (!SYMBOLP (symbol))
|
|
|
3475 goto invalid_function;
|
|
|
3476 if (EQ (symbol, Qand_rest))
|
|
|
3477 rest = 1;
|
|
|
3478 else if (EQ (symbol, Qand_optional))
|
|
|
3479 optional = 1;
|
|
|
3480 else if (rest)
|
|
|
3481 {
|
|
|
3482 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3483 i = nargs;
|
|
|
3484 }
|
|
|
3485 else if (i < nargs)
|
|
|
3486 specbind (symbol, args[i++]);
|
|
|
3487 else if (!optional)
|
|
|
3488 goto wrong_number_of_arguments;
|
|
|
3489 else
|
|
|
3490 specbind (symbol, Qnil);
|
|
|
3491 }
|
|
|
3492 }
|
|
|
3493
|
|
|
3494 if (i < nargs)
|
|
|
3495 goto wrong_number_of_arguments;
|
|
|
3496
|
|
|
3497 return unbind_to (speccount, Fprogn (body));
|
|
|
3498
|
|
|
3499 wrong_number_of_arguments:
|
|
436
|
3500 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
3501
|
|
|
3502 invalid_function:
|
|
436
|
3503 return signal_invalid_function_error (fun);
|
|
428
|
3504 }
|
|
|
3505
|
|
|
3506
|
|
|
3507 /************************************************************************/
|
|
|
3508 /* Run hook variables in various ways. */
|
|
|
3509 /************************************************************************/
|
|
|
3510
|
|
|
3511 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
3512 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3513 Each argument should be a symbol, a hook variable.
|
|
|
3514 These symbols are processed in the order specified.
|
|
|
3515 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3516 or a list of functions to be called to run the hook.
|
|
|
3517 If the value is a function, it is called with no arguments.
|
|
|
3518 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3519
|
|
|
3520 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3521 not `make-local-variable'.
|
|
|
3522 */
|
|
|
3523 (int nargs, Lisp_Object *args))
|
|
|
3524 {
|
|
|
3525 REGISTER int i;
|
|
|
3526
|
|
|
3527 for (i = 0; i < nargs; i++)
|
|
|
3528 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
3529
|
|
|
3530 return Qnil;
|
|
|
3531 }
|
|
|
3532
|
|
|
3533 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
3534 Run HOOK with the specified arguments ARGS.
|
|
|
3535 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3536 value, that value may be a function or a list of functions to be
|
|
|
3537 called to run the hook. If the value is a function, it is called with
|
|
|
3538 the given arguments and its return value is returned. If it is a list
|
|
|
3539 of functions, those functions are called, in order,
|
|
|
3540 with the given arguments ARGS.
|
|
|
3541 It is best not to depend on the value return by `run-hook-with-args',
|
|
|
3542 as that may change.
|
|
|
3543
|
|
|
3544 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3545 not `make-local-variable'.
|
|
|
3546 */
|
|
|
3547 (int nargs, Lisp_Object *args))
|
|
|
3548 {
|
|
|
3549 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3550 }
|
|
|
3551
|
|
|
3552 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
3553 Run HOOK with the specified arguments ARGS.
|
|
|
3554 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3555 be a list of functions. We call those functions, one by one,
|
|
|
3556 passing arguments ARGS to each of them, until one of them
|
|
|
3557 returns a non-nil value. Then we return that value.
|
|
|
3558 If all the functions return nil, we return nil.
|
|
|
3559
|
|
|
3560 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3561 not `make-local-variable'.
|
|
|
3562 */
|
|
|
3563 (int nargs, Lisp_Object *args))
|
|
|
3564 {
|
|
|
3565 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3566 }
|
|
|
3567
|
|
|
3568 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
3569 Run HOOK with the specified arguments ARGS.
|
|
|
3570 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3571 be a list of functions. We call those functions, one by one,
|
|
|
3572 passing arguments ARGS to each of them, until one of them
|
|
|
3573 returns nil. Then we return nil.
|
|
|
3574 If all the functions return non-nil, we return non-nil.
|
|
|
3575
|
|
|
3576 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3577 not `make-local-variable'.
|
|
|
3578 */
|
|
|
3579 (int nargs, Lisp_Object *args))
|
|
|
3580 {
|
|
|
3581 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3582 }
|
|
|
3583
|
|
|
3584 /* ARGS[0] should be a hook symbol.
|
|
|
3585 Call each of the functions in the hook value, passing each of them
|
|
|
3586 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3587 COND specifies a condition to test after each call
|
|
|
3588 to decide whether to stop.
|
|
|
3589 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3590 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3591
|
|
|
3592 Lisp_Object
|
|
|
3593 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3594 enum run_hooks_condition cond)
|
|
|
3595 {
|
|
|
3596 Lisp_Object sym, val, ret;
|
|
|
3597
|
|
|
3598 if (!initialized || preparing_for_armageddon)
|
|
|
3599 /* We need to bail out of here pronto. */
|
|
|
3600 return Qnil;
|
|
|
3601
|
|
|
3602 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3603 will also be true unless something is really hosed. */
|
|
|
3604 assert (!gc_in_progress);
|
|
|
3605
|
|
|
3606 sym = args[0];
|
|
|
3607 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3608 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3609
|
|
|
3610 if (UNBOUNDP (val) || NILP (val))
|
|
|
3611 return ret;
|
|
|
3612 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3613 {
|
|
|
3614 args[0] = val;
|
|
|
3615 return Ffuncall (nargs, args);
|
|
|
3616 }
|
|
|
3617 else
|
|
|
3618 {
|
|
|
3619 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3620 Lisp_Object globals = Qnil;
|
|
|
3621 GCPRO3 (sym, val, globals);
|
|
|
3622
|
|
|
3623 for (;
|
|
|
3624 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3625 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3626 : !NILP (ret)));
|
|
|
3627 val = XCDR (val))
|
|
|
3628 {
|
|
|
3629 if (EQ (XCAR (val), Qt))
|
|
|
3630 {
|
|
|
3631 /* t indicates this hook has a local binding;
|
|
|
3632 it means to run the global binding too. */
|
|
|
3633 globals = Fdefault_value (sym);
|
|
|
3634
|
|
|
3635 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3636 ! NILP (globals))
|
|
|
3637 {
|
|
|
3638 args[0] = globals;
|
|
|
3639 ret = Ffuncall (nargs, args);
|
|
|
3640 }
|
|
|
3641 else
|
|
|
3642 {
|
|
|
3643 for (;
|
|
|
3644 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3645 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3646 ? NILP (ret)
|
|
|
3647 : !NILP (ret)));
|
|
|
3648 globals = XCDR (globals))
|
|
|
3649 {
|
|
|
3650 args[0] = XCAR (globals);
|
|
|
3651 /* In a global value, t should not occur. If it does, we
|
|
|
3652 must ignore it to avoid an endless loop. */
|
|
|
3653 if (!EQ (args[0], Qt))
|
|
|
3654 ret = Ffuncall (nargs, args);
|
|
|
3655 }
|
|
|
3656 }
|
|
|
3657 }
|
|
|
3658 else
|
|
|
3659 {
|
|
|
3660 args[0] = XCAR (val);
|
|
|
3661 ret = Ffuncall (nargs, args);
|
|
|
3662 }
|
|
|
3663 }
|
|
|
3664
|
|
|
3665 UNGCPRO;
|
|
|
3666 return ret;
|
|
|
3667 }
|
|
|
3668 }
|
|
|
3669
|
|
|
3670 Lisp_Object
|
|
|
3671 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3672 enum run_hooks_condition cond)
|
|
|
3673 {
|
|
|
3674 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3675 }
|
|
|
3676
|
|
|
3677 #if 0
|
|
|
3678
|
|
|
3679 /* From FSF 19.30, not currently used */
|
|
|
3680
|
|
|
3681 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3682 present value of that symbol.
|
|
|
3683 Call each element of FUNLIST,
|
|
|
3684 passing each of them the rest of ARGS.
|
|
|
3685 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3686 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3687
|
|
|
3688 Lisp_Object
|
|
|
3689 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3690 {
|
|
|
3691 Lisp_Object sym = args[0];
|
|
|
3692 Lisp_Object val;
|
|
|
3693 struct gcpro gcpro1, gcpro2;
|
|
|
3694
|
|
|
3695 GCPRO2 (sym, val);
|
|
|
3696
|
|
|
3697 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3698 {
|
|
|
3699 if (EQ (XCAR (val), Qt))
|
|
|
3700 {
|
|
|
3701 /* t indicates this hook has a local binding;
|
|
|
3702 it means to run the global binding too. */
|
|
|
3703 Lisp_Object globals;
|
|
|
3704
|
|
|
3705 for (globals = Fdefault_value (sym);
|
|
|
3706 CONSP (globals);
|
|
|
3707 globals = XCDR (globals))
|
|
|
3708 {
|
|
|
3709 args[0] = XCAR (globals);
|
|
|
3710 /* In a global value, t should not occur. If it does, we
|
|
|
3711 must ignore it to avoid an endless loop. */
|
|
|
3712 if (!EQ (args[0], Qt))
|
|
|
3713 Ffuncall (nargs, args);
|
|
|
3714 }
|
|
|
3715 }
|
|
|
3716 else
|
|
|
3717 {
|
|
|
3718 args[0] = XCAR (val);
|
|
|
3719 Ffuncall (nargs, args);
|
|
|
3720 }
|
|
|
3721 }
|
|
|
3722 UNGCPRO;
|
|
|
3723 return Qnil;
|
|
|
3724 }
|
|
|
3725
|
|
|
3726 #endif /* 0 */
|
|
|
3727
|
|
|
3728 void
|
|
|
3729 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3730 {
|
|
|
3731 /* This function can GC */
|
|
|
3732 struct gcpro gcpro1;
|
|
|
3733 int i;
|
|
|
3734 va_list vargs;
|
|
|
3735 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
3736
|
|
|
3737 va_start (vargs, nargs);
|
|
|
3738 funcall_args[0] = hook_var;
|
|
|
3739 for (i = 0; i < nargs; i++)
|
|
|
3740 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3741 va_end (vargs);
|
|
|
3742
|
|
|
3743 GCPRO1 (*funcall_args);
|
|
|
3744 gcpro1.nvars = nargs + 1;
|
|
|
3745 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3746 UNGCPRO;
|
|
|
3747 }
|
|
|
3748
|
|
|
3749 void
|
|
|
3750 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3751 int nargs, ...)
|
|
|
3752 {
|
|
|
3753 /* This function can GC */
|
|
|
3754 struct gcpro gcpro1;
|
|
|
3755 int i;
|
|
|
3756 va_list vargs;
|
|
|
3757 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
3758
|
|
|
3759 va_start (vargs, nargs);
|
|
|
3760 funcall_args[0] = hook_var;
|
|
|
3761 for (i = 0; i < nargs; i++)
|
|
|
3762 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3763 va_end (vargs);
|
|
|
3764
|
|
|
3765 GCPRO1 (*funcall_args);
|
|
|
3766 gcpro1.nvars = nargs + 1;
|
|
|
3767 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3768 RUN_HOOKS_TO_COMPLETION);
|
|
|
3769 UNGCPRO;
|
|
|
3770 }
|
|
|
3771
|
|
|
3772 Lisp_Object
|
|
|
3773 run_hook (Lisp_Object hook)
|
|
|
3774 {
|
|
|
3775 Frun_hooks (1, &hook);
|
|
|
3776 return Qnil;
|
|
|
3777 }
|
|
|
3778
|
|
|
3779
|
|
|
3780 /************************************************************************/
|
|
|
3781 /* Front-ends to eval, funcall, apply */
|
|
|
3782 /************************************************************************/
|
|
|
3783
|
|
|
3784 /* Apply fn to arg */
|
|
|
3785 Lisp_Object
|
|
|
3786 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3787 {
|
|
|
3788 /* This function can GC */
|
|
|
3789 struct gcpro gcpro1;
|
|
|
3790 Lisp_Object args[2];
|
|
|
3791
|
|
|
3792 if (NILP (arg))
|
|
|
3793 return Ffuncall (1, &fn);
|
|
|
3794 GCPRO1 (args[0]);
|
|
|
3795 gcpro1.nvars = 2;
|
|
|
3796 args[0] = fn;
|
|
|
3797 args[1] = arg;
|
|
|
3798 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3799 }
|
|
|
3800
|
|
|
3801 /* Call function fn on no arguments */
|
|
|
3802 Lisp_Object
|
|
|
3803 call0 (Lisp_Object fn)
|
|
|
3804 {
|
|
|
3805 /* This function can GC */
|
|
|
3806 struct gcpro gcpro1;
|
|
|
3807
|
|
|
3808 GCPRO1 (fn);
|
|
|
3809 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3810 }
|
|
|
3811
|
|
|
3812 /* Call function fn with argument arg0 */
|
|
|
3813 Lisp_Object
|
|
|
3814 call1 (Lisp_Object fn,
|
|
|
3815 Lisp_Object arg0)
|
|
|
3816 {
|
|
|
3817 /* This function can GC */
|
|
|
3818 struct gcpro gcpro1;
|
|
|
3819 Lisp_Object args[2];
|
|
|
3820 args[0] = fn;
|
|
|
3821 args[1] = arg0;
|
|
|
3822 GCPRO1 (args[0]);
|
|
|
3823 gcpro1.nvars = 2;
|
|
|
3824 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3825 }
|
|
|
3826
|
|
|
3827 /* Call function fn with arguments arg0, arg1 */
|
|
|
3828 Lisp_Object
|
|
|
3829 call2 (Lisp_Object fn,
|
|
|
3830 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3831 {
|
|
|
3832 /* This function can GC */
|
|
|
3833 struct gcpro gcpro1;
|
|
|
3834 Lisp_Object args[3];
|
|
|
3835 args[0] = fn;
|
|
|
3836 args[1] = arg0;
|
|
|
3837 args[2] = arg1;
|
|
|
3838 GCPRO1 (args[0]);
|
|
|
3839 gcpro1.nvars = 3;
|
|
|
3840 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3841 }
|
|
|
3842
|
|
|
3843 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3844 Lisp_Object
|
|
|
3845 call3 (Lisp_Object fn,
|
|
|
3846 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3847 {
|
|
|
3848 /* This function can GC */
|
|
|
3849 struct gcpro gcpro1;
|
|
|
3850 Lisp_Object args[4];
|
|
|
3851 args[0] = fn;
|
|
|
3852 args[1] = arg0;
|
|
|
3853 args[2] = arg1;
|
|
|
3854 args[3] = arg2;
|
|
|
3855 GCPRO1 (args[0]);
|
|
|
3856 gcpro1.nvars = 4;
|
|
|
3857 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3858 }
|
|
|
3859
|
|
|
3860 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3861 Lisp_Object
|
|
|
3862 call4 (Lisp_Object fn,
|
|
|
3863 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3864 Lisp_Object arg3)
|
|
|
3865 {
|
|
|
3866 /* This function can GC */
|
|
|
3867 struct gcpro gcpro1;
|
|
|
3868 Lisp_Object args[5];
|
|
|
3869 args[0] = fn;
|
|
|
3870 args[1] = arg0;
|
|
|
3871 args[2] = arg1;
|
|
|
3872 args[3] = arg2;
|
|
|
3873 args[4] = arg3;
|
|
|
3874 GCPRO1 (args[0]);
|
|
|
3875 gcpro1.nvars = 5;
|
|
|
3876 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3877 }
|
|
|
3878
|
|
|
3879 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3880 Lisp_Object
|
|
|
3881 call5 (Lisp_Object fn,
|
|
|
3882 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3883 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3884 {
|
|
|
3885 /* This function can GC */
|
|
|
3886 struct gcpro gcpro1;
|
|
|
3887 Lisp_Object args[6];
|
|
|
3888 args[0] = fn;
|
|
|
3889 args[1] = arg0;
|
|
|
3890 args[2] = arg1;
|
|
|
3891 args[3] = arg2;
|
|
|
3892 args[4] = arg3;
|
|
|
3893 args[5] = arg4;
|
|
|
3894 GCPRO1 (args[0]);
|
|
|
3895 gcpro1.nvars = 6;
|
|
|
3896 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
3897 }
|
|
|
3898
|
|
|
3899 Lisp_Object
|
|
|
3900 call6 (Lisp_Object fn,
|
|
|
3901 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3902 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
3903 {
|
|
|
3904 /* This function can GC */
|
|
|
3905 struct gcpro gcpro1;
|
|
|
3906 Lisp_Object args[7];
|
|
|
3907 args[0] = fn;
|
|
|
3908 args[1] = arg0;
|
|
|
3909 args[2] = arg1;
|
|
|
3910 args[3] = arg2;
|
|
|
3911 args[4] = arg3;
|
|
|
3912 args[5] = arg4;
|
|
|
3913 args[6] = arg5;
|
|
|
3914 GCPRO1 (args[0]);
|
|
|
3915 gcpro1.nvars = 7;
|
|
|
3916 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
3917 }
|
|
|
3918
|
|
|
3919 Lisp_Object
|
|
|
3920 call7 (Lisp_Object fn,
|
|
|
3921 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3922 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3923 Lisp_Object arg6)
|
|
|
3924 {
|
|
|
3925 /* This function can GC */
|
|
|
3926 struct gcpro gcpro1;
|
|
|
3927 Lisp_Object args[8];
|
|
|
3928 args[0] = fn;
|
|
|
3929 args[1] = arg0;
|
|
|
3930 args[2] = arg1;
|
|
|
3931 args[3] = arg2;
|
|
|
3932 args[4] = arg3;
|
|
|
3933 args[5] = arg4;
|
|
|
3934 args[6] = arg5;
|
|
|
3935 args[7] = arg6;
|
|
|
3936 GCPRO1 (args[0]);
|
|
|
3937 gcpro1.nvars = 8;
|
|
|
3938 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
3939 }
|
|
|
3940
|
|
|
3941 Lisp_Object
|
|
|
3942 call8 (Lisp_Object fn,
|
|
|
3943 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3944 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3945 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
3946 {
|
|
|
3947 /* This function can GC */
|
|
|
3948 struct gcpro gcpro1;
|
|
|
3949 Lisp_Object args[9];
|
|
|
3950 args[0] = fn;
|
|
|
3951 args[1] = arg0;
|
|
|
3952 args[2] = arg1;
|
|
|
3953 args[3] = arg2;
|
|
|
3954 args[4] = arg3;
|
|
|
3955 args[5] = arg4;
|
|
|
3956 args[6] = arg5;
|
|
|
3957 args[7] = arg6;
|
|
|
3958 args[8] = arg7;
|
|
|
3959 GCPRO1 (args[0]);
|
|
|
3960 gcpro1.nvars = 9;
|
|
|
3961 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
3962 }
|
|
|
3963
|
|
|
3964 Lisp_Object
|
|
|
3965 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
3966 {
|
|
|
3967 if (current_buffer == buf)
|
|
|
3968 return call0 (fn);
|
|
|
3969 else
|
|
|
3970 {
|
|
|
3971 Lisp_Object val;
|
|
|
3972 int speccount = specpdl_depth();
|
|
|
3973 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
3974 set_buffer_internal (buf);
|
|
|
3975 val = call0 (fn);
|
|
|
3976 unbind_to (speccount, Qnil);
|
|
|
3977 return val;
|
|
|
3978 }
|
|
|
3979 }
|
|
|
3980
|
|
|
3981 Lisp_Object
|
|
|
3982 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
3983 Lisp_Object arg0)
|
|
|
3984 {
|
|
|
3985 if (current_buffer == buf)
|
|
|
3986 return call1 (fn, arg0);
|
|
|
3987 else
|
|
|
3988 {
|
|
|
3989 Lisp_Object val;
|
|
|
3990 int speccount = specpdl_depth();
|
|
|
3991 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
3992 set_buffer_internal (buf);
|
|
|
3993 val = call1 (fn, arg0);
|
|
|
3994 unbind_to (speccount, Qnil);
|
|
|
3995 return val;
|
|
|
3996 }
|
|
|
3997 }
|
|
|
3998
|
|
|
3999 Lisp_Object
|
|
|
4000 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4001 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4002 {
|
|
|
4003 if (current_buffer == buf)
|
|
|
4004 return call2 (fn, arg0, arg1);
|
|
|
4005 else
|
|
|
4006 {
|
|
|
4007 Lisp_Object val;
|
|
|
4008 int speccount = specpdl_depth();
|
|
|
4009 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4010 set_buffer_internal (buf);
|
|
|
4011 val = call2 (fn, arg0, arg1);
|
|
|
4012 unbind_to (speccount, Qnil);
|
|
|
4013 return val;
|
|
|
4014 }
|
|
|
4015 }
|
|
|
4016
|
|
|
4017 Lisp_Object
|
|
|
4018 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4019 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4020 {
|
|
|
4021 if (current_buffer == buf)
|
|
|
4022 return call3 (fn, arg0, arg1, arg2);
|
|
|
4023 else
|
|
|
4024 {
|
|
|
4025 Lisp_Object val;
|
|
|
4026 int speccount = specpdl_depth();
|
|
|
4027 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4028 set_buffer_internal (buf);
|
|
|
4029 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4030 unbind_to (speccount, Qnil);
|
|
|
4031 return val;
|
|
|
4032 }
|
|
|
4033 }
|
|
|
4034
|
|
|
4035 Lisp_Object
|
|
|
4036 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4037 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4038 Lisp_Object arg3)
|
|
|
4039 {
|
|
|
4040 if (current_buffer == buf)
|
|
|
4041 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4042 else
|
|
|
4043 {
|
|
|
4044 Lisp_Object val;
|
|
|
4045 int speccount = specpdl_depth();
|
|
|
4046 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4047 set_buffer_internal (buf);
|
|
|
4048 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4049 unbind_to (speccount, Qnil);
|
|
|
4050 return val;
|
|
|
4051 }
|
|
|
4052 }
|
|
|
4053
|
|
|
4054 Lisp_Object
|
|
|
4055 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4056 {
|
|
|
4057 if (current_buffer == buf)
|
|
|
4058 return Feval (form);
|
|
|
4059 else
|
|
|
4060 {
|
|
|
4061 Lisp_Object val;
|
|
|
4062 int speccount = specpdl_depth();
|
|
|
4063 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4064 set_buffer_internal (buf);
|
|
|
4065 val = Feval (form);
|
|
|
4066 unbind_to (speccount, Qnil);
|
|
|
4067 return val;
|
|
|
4068 }
|
|
|
4069 }
|
|
|
4070
|
|
|
4071
|
|
|
4072 /************************************************************************/
|
|
|
4073 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4074 /************************************************************************/
|
|
|
4075
|
|
|
4076 /* Call function fn on no arguments, with condition handler */
|
|
|
4077 Lisp_Object
|
|
|
4078 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4079 {
|
|
|
4080 /* This function can GC */
|
|
|
4081 struct gcpro gcpro1;
|
|
|
4082 Lisp_Object args[2];
|
|
|
4083 args[0] = handler;
|
|
|
4084 args[1] = fn;
|
|
|
4085 GCPRO1 (args[0]);
|
|
|
4086 gcpro1.nvars = 2;
|
|
|
4087 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4088 }
|
|
|
4089
|
|
|
4090 /* Call function fn with argument arg0, with condition handler */
|
|
|
4091 Lisp_Object
|
|
|
4092 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4093 Lisp_Object arg0)
|
|
|
4094 {
|
|
|
4095 /* This function can GC */
|
|
|
4096 struct gcpro gcpro1;
|
|
|
4097 Lisp_Object args[3];
|
|
|
4098 args[0] = handler;
|
|
|
4099 args[1] = fn;
|
|
|
4100 args[2] = arg0;
|
|
|
4101 GCPRO1 (args[0]);
|
|
|
4102 gcpro1.nvars = 3;
|
|
|
4103 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4104 }
|
|
|
4105
|
|
|
4106
|
|
|
4107 /* The following functions provide you with error-trapping versions
|
|
|
4108 of the various front-ends above. They take an additional
|
|
|
4109 "warning_string" argument; if non-zero, a warning with this
|
|
|
4110 string and the actual error that occurred will be displayed
|
|
|
4111 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4112 QUIT is inhibited while these functions are running, and if
|
|
|
4113 an error occurs, Qunbound is returned instead of the normal
|
|
|
4114 return value.
|
|
|
4115 */
|
|
|
4116
|
|
|
4117 /* #### This stuff needs to catch throws as well. We need to
|
|
|
4118 improve internal_catch() so it can take a "catch anything"
|
|
|
4119 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4120
|
|
|
4121 static Lisp_Object
|
|
|
4122 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4123 {
|
|
|
4124 if (!NILP (errordata))
|
|
|
4125 {
|
|
|
4126 Lisp_Object args[2];
|
|
|
4127
|
|
|
4128 if (!NILP (arg))
|
|
|
4129 {
|
|
|
4130 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4131 args[0] = build_string (str);
|
|
|
4132 }
|
|
|
4133 else
|
|
|
4134 args[0] = build_string ("error");
|
|
|
4135 /* #### This should call
|
|
|
4136 (with-output-to-string (display-error errordata))
|
|
|
4137 but that stuff is all in Lisp currently. */
|
|
|
4138 args[1] = errordata;
|
|
|
4139 warn_when_safe_lispobj
|
|
|
4140 (Qerror, Qwarning,
|
|
|
4141 emacs_doprnt_string_lisp ((CONST Bufbyte *) "%s: %s",
|
|
|
4142 Qnil, -1, 2, args));
|
|
|
4143 }
|
|
|
4144 return Qunbound;
|
|
|
4145 }
|
|
|
4146
|
|
|
4147 static Lisp_Object
|
|
|
4148 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4149 {
|
|
|
4150 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4151 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4152 return caught_a_squirmer (errordata, arg);
|
|
|
4153 }
|
|
|
4154
|
|
|
4155 static Lisp_Object
|
|
|
4156 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4157 {
|
|
|
4158 Lisp_Object hook = Fcar (arg);
|
|
|
4159 arg = Fcdr (arg);
|
|
|
4160 /* Clear out the hook. */
|
|
|
4161 Fset (hook, Qnil);
|
|
|
4162 return caught_a_squirmer (errordata, arg);
|
|
|
4163 }
|
|
|
4164
|
|
|
4165 static Lisp_Object
|
|
|
4166 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4167 Lisp_Object arg)
|
|
|
4168 {
|
|
|
4169 Lisp_Object hook = Fcar (arg);
|
|
|
4170 arg = Fcdr (arg);
|
|
|
4171 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4172 /* Clear out the hook. */
|
|
|
4173 Fset (hook, Qnil);
|
|
|
4174 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4175 }
|
|
|
4176
|
|
|
4177 static Lisp_Object
|
|
|
4178 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4179 {
|
|
|
4180 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4181 }
|
|
|
4182
|
|
|
4183 Lisp_Object
|
|
|
4184 eval_in_buffer_trapping_errors (CONST char *warning_string,
|
|
|
4185 struct buffer *buf, Lisp_Object form)
|
|
|
4186 {
|
|
|
4187 int speccount = specpdl_depth();
|
|
|
4188 Lisp_Object tem;
|
|
|
4189 Lisp_Object buffer;
|
|
|
4190 Lisp_Object cons;
|
|
|
4191 Lisp_Object opaque;
|
|
|
4192 struct gcpro gcpro1, gcpro2;
|
|
|
4193
|
|
|
4194 XSETBUFFER (buffer, buf);
|
|
|
4195
|
|
|
4196 specbind (Qinhibit_quit, Qt);
|
|
|
4197 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4198
|
|
|
4199 cons = noseeum_cons (buffer, form);
|
|
|
4200 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4201 GCPRO2 (cons, opaque);
|
|
|
4202 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4203 tem = condition_case_1 (Qerror,
|
|
|
4204 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4205 caught_a_squirmer, opaque);
|
|
|
4206 free_cons (XCONS (cons));
|
|
|
4207 if (OPAQUE_PTRP (opaque))
|
|
|
4208 free_opaque_ptr (opaque);
|
|
|
4209 UNGCPRO;
|
|
|
4210
|
|
|
4211 /* gc_currently_forbidden = 0; */
|
|
|
4212 return unbind_to (speccount, tem);
|
|
|
4213 }
|
|
|
4214
|
|
|
4215 static Lisp_Object
|
|
|
4216 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4217 {
|
|
|
4218 /* This function can GC */
|
|
|
4219 run_hook (hook_symbol);
|
|
|
4220 return Qnil;
|
|
|
4221 }
|
|
|
4222
|
|
|
4223 Lisp_Object
|
|
|
4224 run_hook_trapping_errors (CONST char *warning_string, Lisp_Object hook_symbol)
|
|
|
4225 {
|
|
|
4226 int speccount;
|
|
|
4227 Lisp_Object tem;
|
|
|
4228 Lisp_Object opaque;
|
|
|
4229 struct gcpro gcpro1;
|
|
|
4230
|
|
|
4231 if (!initialized || preparing_for_armageddon)
|
|
|
4232 return Qnil;
|
|
|
4233 tem = find_symbol_value (hook_symbol);
|
|
|
4234 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4235 return Qnil;
|
|
|
4236
|
|
|
4237 speccount = specpdl_depth();
|
|
|
4238 specbind (Qinhibit_quit, Qt);
|
|
|
4239
|
|
|
4240 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4241 GCPRO1 (opaque);
|
|
|
4242 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4243 tem = condition_case_1 (Qerror,
|
|
|
4244 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4245 caught_a_squirmer, opaque);
|
|
|
4246 if (OPAQUE_PTRP (opaque))
|
|
|
4247 free_opaque_ptr (opaque);
|
|
|
4248 UNGCPRO;
|
|
|
4249
|
|
|
4250 return unbind_to (speccount, tem);
|
|
|
4251 }
|
|
|
4252
|
|
|
4253 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4254 if an error occurs. */
|
|
|
4255
|
|
|
4256 Lisp_Object
|
|
|
4257 safe_run_hook_trapping_errors (CONST char *warning_string,
|
|
|
4258 Lisp_Object hook_symbol,
|
|
|
4259 int allow_quit)
|
|
|
4260 {
|
|
|
4261 int speccount = specpdl_depth();
|
|
|
4262 Lisp_Object tem;
|
|
|
4263 Lisp_Object cons = Qnil;
|
|
|
4264 struct gcpro gcpro1;
|
|
|
4265
|
|
|
4266 if (!initialized || preparing_for_armageddon)
|
|
|
4267 return Qnil;
|
|
|
4268 tem = find_symbol_value (hook_symbol);
|
|
|
4269 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4270 return Qnil;
|
|
|
4271
|
|
|
4272 if (!allow_quit)
|
|
|
4273 specbind (Qinhibit_quit, Qt);
|
|
|
4274
|
|
|
4275 cons = noseeum_cons (hook_symbol,
|
|
|
4276 warning_string ? make_opaque_ptr ((void *)warning_string)
|
|
|
4277 : Qnil);
|
|
|
4278 GCPRO1 (cons);
|
|
|
4279 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4280 tem = condition_case_1 (Qerror,
|
|
|
4281 catch_them_squirmers_run_hook,
|
|
|
4282 hook_symbol,
|
|
|
4283 allow_quit ?
|
|
|
4284 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4285 safe_run_hook_caught_a_squirmer,
|
|
|
4286 cons);
|
|
|
4287 if (OPAQUE_PTRP (XCDR (cons)))
|
|
|
4288 free_opaque_ptr (XCDR (cons));
|
|
|
4289 free_cons (XCONS (cons));
|
|
|
4290 UNGCPRO;
|
|
|
4291
|
|
|
4292 return unbind_to (speccount, tem);
|
|
|
4293 }
|
|
|
4294
|
|
|
4295 static Lisp_Object
|
|
|
4296 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4297 {
|
|
|
4298 /* This function can GC */
|
|
|
4299 return call0 (function);
|
|
|
4300 }
|
|
|
4301
|
|
|
4302 Lisp_Object
|
|
|
4303 call0_trapping_errors (CONST char *warning_string, Lisp_Object function)
|
|
|
4304 {
|
|
|
4305 int speccount;
|
|
|
4306 Lisp_Object tem;
|
|
|
4307 Lisp_Object opaque = Qnil;
|
|
|
4308 struct gcpro gcpro1, gcpro2;
|
|
|
4309
|
|
|
4310 if (SYMBOLP (function))
|
|
|
4311 {
|
|
|
4312 tem = XSYMBOL (function)->function;
|
|
|
4313 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4314 return Qnil;
|
|
|
4315 }
|
|
|
4316
|
|
|
4317 GCPRO2 (opaque, function);
|
|
|
4318 speccount = specpdl_depth();
|
|
|
4319 specbind (Qinhibit_quit, Qt);
|
|
|
4320 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4321
|
|
|
4322 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4323 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4324 tem = condition_case_1 (Qerror,
|
|
|
4325 catch_them_squirmers_call0, function,
|
|
|
4326 caught_a_squirmer, opaque);
|
|
|
4327 if (OPAQUE_PTRP (opaque))
|
|
|
4328 free_opaque_ptr (opaque);
|
|
|
4329 UNGCPRO;
|
|
|
4330
|
|
|
4331 /* gc_currently_forbidden = 0; */
|
|
|
4332 return unbind_to (speccount, tem);
|
|
|
4333 }
|
|
|
4334
|
|
|
4335 static Lisp_Object
|
|
|
4336 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4337 {
|
|
|
4338 /* This function can GC */
|
|
|
4339 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4340 }
|
|
|
4341
|
|
|
4342 static Lisp_Object
|
|
|
4343 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4344 {
|
|
|
4345 /* This function can GC */
|
|
|
4346 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4347 }
|
|
|
4348
|
|
|
4349 Lisp_Object
|
|
|
4350 call1_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4351 Lisp_Object object)
|
|
|
4352 {
|
|
|
4353 int speccount = specpdl_depth();
|
|
|
4354 Lisp_Object tem;
|
|
|
4355 Lisp_Object cons = Qnil;
|
|
|
4356 Lisp_Object opaque = Qnil;
|
|
|
4357 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4358
|
|
|
4359 if (SYMBOLP (function))
|
|
|
4360 {
|
|
|
4361 tem = XSYMBOL (function)->function;
|
|
|
4362 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4363 return Qnil;
|
|
|
4364 }
|
|
|
4365
|
|
|
4366 GCPRO4 (cons, opaque, function, object);
|
|
|
4367
|
|
|
4368 specbind (Qinhibit_quit, Qt);
|
|
|
4369 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4370
|
|
|
4371 cons = noseeum_cons (function, object);
|
|
|
4372 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4373 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4374 tem = condition_case_1 (Qerror,
|
|
|
4375 catch_them_squirmers_call1, cons,
|
|
|
4376 caught_a_squirmer, opaque);
|
|
|
4377 if (OPAQUE_PTRP (opaque))
|
|
|
4378 free_opaque_ptr (opaque);
|
|
|
4379 free_cons (XCONS (cons));
|
|
|
4380 UNGCPRO;
|
|
|
4381
|
|
|
4382 /* gc_currently_forbidden = 0; */
|
|
|
4383 return unbind_to (speccount, tem);
|
|
|
4384 }
|
|
|
4385
|
|
|
4386 Lisp_Object
|
|
|
4387 call2_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4388 Lisp_Object object1, Lisp_Object object2)
|
|
|
4389 {
|
|
|
4390 int speccount = specpdl_depth();
|
|
|
4391 Lisp_Object tem;
|
|
|
4392 Lisp_Object cons = Qnil;
|
|
|
4393 Lisp_Object opaque = Qnil;
|
|
|
4394 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4395
|
|
|
4396 if (SYMBOLP (function))
|
|
|
4397 {
|
|
|
4398 tem = XSYMBOL (function)->function;
|
|
|
4399 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4400 return Qnil;
|
|
|
4401 }
|
|
|
4402
|
|
|
4403 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4404 specbind (Qinhibit_quit, Qt);
|
|
|
4405 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4406
|
|
|
4407 cons = list3 (function, object1, object2);
|
|
|
4408 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4409 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4410 tem = condition_case_1 (Qerror,
|
|
|
4411 catch_them_squirmers_call2, cons,
|
|
|
4412 caught_a_squirmer, opaque);
|
|
|
4413 if (OPAQUE_PTRP (opaque))
|
|
|
4414 free_opaque_ptr (opaque);
|
|
|
4415 free_list (cons);
|
|
|
4416 UNGCPRO;
|
|
|
4417
|
|
|
4418 /* gc_currently_forbidden = 0; */
|
|
|
4419 return unbind_to (speccount, tem);
|
|
|
4420 }
|
|
|
4421
|
|
|
4422
|
|
|
4423 /************************************************************************/
|
|
|
4424 /* The special binding stack */
|
|
|
4425 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4426 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4427 /************************************************************************/
|
|
|
4428
|
|
|
4429 #define min_max_specpdl_size 400
|
|
|
4430
|
|
|
4431 void
|
|
|
4432 grow_specpdl (size_t reserved)
|
|
|
4433 {
|
|
|
4434 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4435 if (size_needed >= max_specpdl_size)
|
|
|
4436 {
|
|
|
4437 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4438 max_specpdl_size = min_max_specpdl_size;
|
|
|
4439 if (size_needed >= max_specpdl_size)
|
|
|
4440 {
|
|
|
4441 if (!NILP (Vdebug_on_error) ||
|
|
|
4442 !NILP (Vdebug_on_signal))
|
|
|
4443 /* Leave room for some specpdl in the debugger. */
|
|
|
4444 max_specpdl_size = size_needed + 100;
|
|
|
4445 continuable_error
|
|
|
4446 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4447 }
|
|
|
4448 }
|
|
|
4449 while (specpdl_size < size_needed)
|
|
|
4450 {
|
|
|
4451 specpdl_size *= 2;
|
|
|
4452 if (specpdl_size > max_specpdl_size)
|
|
|
4453 specpdl_size = max_specpdl_size;
|
|
|
4454 }
|
|
|
4455 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
4456 specpdl_ptr = specpdl + specpdl_depth();
|
|
|
4457 }
|
|
|
4458
|
|
|
4459
|
|
|
4460 /* Handle unbinding buffer-local variables */
|
|
|
4461 static Lisp_Object
|
|
|
4462 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4463 {
|
|
|
4464 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4465 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4466 struct Lisp_Cons *victim = XCONS (ovalue);
|
|
|
4467 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4468 ovalue = victim->cdr;
|
|
|
4469
|
|
|
4470 free_cons (victim);
|
|
|
4471
|
|
|
4472 if (NILP (buf))
|
|
|
4473 {
|
|
|
4474 /* Deleted buffer -- do nothing */
|
|
|
4475 }
|
|
|
4476 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4477 {
|
|
|
4478 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4479 * (kill-local-variable can do this.)
|
|
|
4480 * Do nothing in this case.
|
|
|
4481 */
|
|
|
4482 }
|
|
|
4483 else if (EQ (buf, current))
|
|
|
4484 Fset (symbol, ovalue);
|
|
|
4485 else
|
|
|
4486 {
|
|
|
4487 /* Urk! Somebody switched buffers */
|
|
|
4488 struct gcpro gcpro1;
|
|
|
4489 GCPRO1 (current);
|
|
|
4490 Fset_buffer (buf);
|
|
|
4491 Fset (symbol, ovalue);
|
|
|
4492 Fset_buffer (current);
|
|
|
4493 UNGCPRO;
|
|
|
4494 }
|
|
|
4495 return symbol;
|
|
|
4496 }
|
|
|
4497
|
|
|
4498 static Lisp_Object
|
|
|
4499 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4500 {
|
|
|
4501 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4502 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4503
|
|
|
4504 buffer = get_buffer (buffer, 0);
|
|
|
4505 if (NILP (buffer))
|
|
|
4506 {
|
|
|
4507 /* Deleted buffer -- do nothing */
|
|
|
4508 }
|
|
|
4509 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4510 {
|
|
|
4511 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4512 * (kill-local-variable can do this.)
|
|
|
4513 * Do nothing in this case.
|
|
|
4514 */
|
|
|
4515 }
|
|
|
4516 else if (EQ (buffer, current))
|
|
|
4517 Fkill_local_variable (symbol);
|
|
|
4518 else
|
|
|
4519 {
|
|
|
4520 /* Urk! Somebody switched buffers */
|
|
|
4521 struct gcpro gcpro1;
|
|
|
4522 GCPRO1 (current);
|
|
|
4523 Fset_buffer (buffer);
|
|
|
4524 Fkill_local_variable (symbol);
|
|
|
4525 Fset_buffer (current);
|
|
|
4526 UNGCPRO;
|
|
|
4527 }
|
|
|
4528 return symbol;
|
|
|
4529 }
|
|
|
4530
|
|
|
4531
|
|
|
4532 void
|
|
|
4533 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4534 {
|
|
|
4535 SPECBIND (symbol, value);
|
|
|
4536 }
|
|
|
4537
|
|
|
4538 void
|
|
|
4539 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4540 {
|
|
|
4541 int buffer_local =
|
|
|
4542 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4543
|
|
|
4544 if (buffer_local == 0)
|
|
|
4545 {
|
|
|
4546 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4547 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4548 }
|
|
|
4549 else if (buffer_local > 0)
|
|
|
4550 {
|
|
|
4551 /* Already buffer-local */
|
|
|
4552 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4553 find_symbol_value (symbol));
|
|
|
4554 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4555 }
|
|
|
4556 else
|
|
|
4557 {
|
|
|
4558 /* About to become buffer-local */
|
|
|
4559 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4560 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4561 }
|
|
|
4562
|
|
|
4563 specpdl_ptr->symbol = symbol;
|
|
|
4564 specpdl_ptr++;
|
|
|
4565 specpdl_depth_counter++;
|
|
|
4566
|
|
|
4567 Fset (symbol, value);
|
|
|
4568 }
|
|
|
4569
|
|
|
4570 void
|
|
|
4571 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4572 Lisp_Object arg)
|
|
|
4573 {
|
|
|
4574 SPECPDL_RESERVE (1);
|
|
|
4575 specpdl_ptr->func = function;
|
|
|
4576 specpdl_ptr->symbol = Qnil;
|
|
|
4577 specpdl_ptr->old_value = arg;
|
|
|
4578 specpdl_ptr++;
|
|
|
4579 specpdl_depth_counter++;
|
|
|
4580 }
|
|
|
4581
|
|
|
4582 extern int check_sigio (void);
|
|
|
4583
|
|
|
4584 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4585 VALUE is not used, except that, purely as a convenience to the
|
|
|
4586 caller, it is protected from garbage-protection. */
|
|
|
4587 Lisp_Object
|
|
|
4588 unbind_to (int count, Lisp_Object value)
|
|
|
4589 {
|
|
|
4590 UNBIND_TO_GCPRO (count, value);
|
|
|
4591 return value;
|
|
|
4592 }
|
|
|
4593
|
|
|
4594 /* Don't call this directly.
|
|
|
4595 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4596 void
|
|
|
4597 unbind_to_hairy (int count)
|
|
|
4598 {
|
|
|
4599 int quitf;
|
|
|
4600
|
|
|
4601 check_quit (); /* make Vquit_flag accurate */
|
|
|
4602 quitf = !NILP (Vquit_flag);
|
|
|
4603 Vquit_flag = Qnil;
|
|
|
4604
|
|
|
4605 ++specpdl_ptr;
|
|
|
4606 ++specpdl_depth_counter;
|
|
|
4607
|
|
|
4608 while (specpdl_depth_counter != count)
|
|
|
4609 {
|
|
|
4610 --specpdl_ptr;
|
|
|
4611 --specpdl_depth_counter;
|
|
|
4612
|
|
|
4613 if (specpdl_ptr->func != 0)
|
|
|
4614 /* An unwind-protect */
|
|
|
4615 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
4616 else
|
|
|
4617 {
|
|
|
4618 /* We checked symbol for validity when we specbound it,
|
|
|
4619 so only need to call Fset if symbol has magic value. */
|
|
|
4620 struct Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
|
4621 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4622 sym->value = specpdl_ptr->old_value;
|
|
|
4623 else
|
|
|
4624 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4625 }
|
|
|
4626
|
|
|
4627 #if 0 /* martin */
|
|
|
4628 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4629 /* There should never be anything here for us to remove.
|
|
|
4630 If so, it indicates a logic error in Emacs. Catches
|
|
|
4631 should get removed when a throw or signal occurs, or
|
|
|
4632 when a catch or condition-case exits normally. But
|
|
|
4633 it's too dangerous to just remove this code. --ben */
|
|
|
4634
|
|
|
4635 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4636 Braino on mly's part? */
|
|
|
4637 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4638 that catch can't possibly still be valid. */
|
|
|
4639 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4640 {
|
|
|
4641 catchlist = catchlist->next;
|
|
|
4642 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4643 }
|
|
|
4644 #endif
|
|
|
4645 #endif
|
|
|
4646 }
|
|
|
4647 if (quitf)
|
|
|
4648 Vquit_flag = Qt;
|
|
|
4649 }
|
|
|
4650
|
|
|
4651
|
|
|
4652
|
|
|
4653 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4654 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4655
|
|
|
4656 Lisp_Object
|
|
|
4657 top_level_value (Lisp_Object symbol)
|
|
|
4658 {
|
|
|
4659 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4660
|
|
|
4661 CHECK_SYMBOL (symbol);
|
|
|
4662 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4663 {
|
|
|
4664 if (EQ (ptr->symbol, symbol))
|
|
|
4665 return ptr->old_value;
|
|
|
4666 }
|
|
|
4667 return XSYMBOL (symbol)->value;
|
|
|
4668 }
|
|
|
4669
|
|
|
4670 #if 0
|
|
|
4671
|
|
|
4672 Lisp_Object
|
|
|
4673 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4674 {
|
|
|
4675 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4676
|
|
|
4677 CHECK_SYMBOL (symbol);
|
|
|
4678 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4679 {
|
|
|
4680 if (EQ (ptr->symbol, symbol))
|
|
|
4681 {
|
|
|
4682 ptr->old_value = newval;
|
|
|
4683 return newval;
|
|
|
4684 }
|
|
|
4685 }
|
|
|
4686 return Fset (symbol, newval);
|
|
|
4687 }
|
|
|
4688
|
|
|
4689 #endif /* 0 */
|
|
|
4690
|
|
|
4691
|
|
|
4692 /************************************************************************/
|
|
|
4693 /* Backtraces */
|
|
|
4694 /************************************************************************/
|
|
|
4695
|
|
|
4696 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
4697 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4698 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
4699 */
|
|
|
4700 (level, flag))
|
|
|
4701 {
|
|
|
4702 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4703 REGISTER int i;
|
|
|
4704
|
|
|
4705 CHECK_INT (level);
|
|
|
4706
|
|
|
4707 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4708 {
|
|
|
4709 backlist = backlist->next;
|
|
|
4710 }
|
|
|
4711
|
|
|
4712 if (backlist)
|
|
|
4713 backlist->debug_on_exit = !NILP (flag);
|
|
|
4714
|
|
|
4715 return flag;
|
|
|
4716 }
|
|
|
4717
|
|
|
4718 static void
|
|
|
4719 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4720 {
|
|
|
4721 int printing_bindings = 0;
|
|
|
4722
|
|
|
4723 for (; speccount > speclimit; speccount--)
|
|
|
4724 {
|
|
|
4725 if (specpdl[speccount - 1].func == 0
|
|
|
4726 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4727 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4728 {
|
|
|
4729 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4730 stream);
|
|
|
4731 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4732 printing_bindings = 1;
|
|
|
4733 }
|
|
|
4734 else
|
|
|
4735 {
|
|
|
4736 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4737 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4738 printing_bindings = 0;
|
|
|
4739 }
|
|
|
4740 }
|
|
|
4741 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4742 }
|
|
|
4743
|
|
|
4744 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
4745 Print a trace of Lisp function calls currently active.
|
|
|
4746 Option arg STREAM specifies the output stream to send the backtrace to,
|
|
|
4747 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4748 DETAILED means show places where currently active variable bindings,
|
|
|
4749 catches, condition-cases, and unwind-protects were made as well as
|
|
|
4750 function calls.
|
|
|
4751 */
|
|
|
4752 (stream, detailed))
|
|
|
4753 {
|
|
|
4754 /* This function can GC */
|
|
|
4755 struct backtrace *backlist = backtrace_list;
|
|
|
4756 struct catchtag *catches = catchlist;
|
|
|
4757 int speccount = specpdl_depth();
|
|
|
4758
|
|
|
4759 int old_nl = print_escape_newlines;
|
|
|
4760 int old_pr = print_readably;
|
|
|
4761 Lisp_Object old_level = Vprint_level;
|
|
|
4762 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4763 struct gcpro gcpro1, gcpro2;
|
|
|
4764
|
|
|
4765 /* We can't allow quits in here because that could cause the values
|
|
|
4766 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4767 Normally we would use a record_unwind_protect but that would
|
|
|
4768 screw up the functioning of this function. */
|
|
|
4769 Vinhibit_quit = Qt;
|
|
|
4770
|
|
|
4771 entering_debugger = 0;
|
|
|
4772
|
|
|
4773 Vprint_level = make_int (3);
|
|
|
4774 print_readably = 0;
|
|
|
4775 print_escape_newlines = 1;
|
|
|
4776
|
|
|
4777 GCPRO2 (stream, old_level);
|
|
|
4778
|
|
|
4779 if (NILP (stream))
|
|
|
4780 stream = Vstandard_output;
|
|
|
4781 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4782 stream = Fselected_frame (Qnil);
|
|
|
4783
|
|
|
4784 for (;;)
|
|
|
4785 {
|
|
|
4786 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4787 {
|
|
|
4788 int catchpdl = catches->pdlcount;
|
|
|
4789 if (specpdl[catchpdl].func == condition_case_unwind
|
|
|
4790 && speccount > catchpdl)
|
|
|
4791 /* This is a condition-case catchpoint */
|
|
|
4792 catchpdl = catchpdl + 1;
|
|
|
4793
|
|
|
4794 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4795
|
|
|
4796 speccount = catches->pdlcount;
|
|
|
4797 if (catchpdl == speccount)
|
|
|
4798 {
|
|
|
4799 write_c_string (" # (catch ", stream);
|
|
|
4800 Fprin1 (catches->tag, stream);
|
|
|
4801 write_c_string (" ...)\n", stream);
|
|
|
4802 }
|
|
|
4803 else
|
|
|
4804 {
|
|
|
4805 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4806 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4807 write_c_string (")\n", stream);
|
|
|
4808 }
|
|
|
4809 catches = catches->next;
|
|
|
4810 }
|
|
|
4811 else if (!backlist)
|
|
|
4812 break;
|
|
|
4813 else
|
|
|
4814 {
|
|
|
4815 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4816 {
|
|
|
4817 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4818 speccount = backlist->pdlcount;
|
|
|
4819 }
|
|
|
4820 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4821 stream);
|
|
|
4822 if (backlist->nargs == UNEVALLED)
|
|
|
4823 {
|
|
|
4824 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4825 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4826 }
|
|
|
4827 else
|
|
|
4828 {
|
|
|
4829 Lisp_Object tem = *backlist->function;
|
|
|
4830 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4831 write_c_string ("(", stream);
|
|
|
4832 if (backlist->nargs == MANY)
|
|
|
4833 {
|
|
|
4834 int i;
|
|
|
4835 Lisp_Object tail = Qnil;
|
|
|
4836 struct gcpro ngcpro1;
|
|
|
4837
|
|
|
4838 NGCPRO1 (tail);
|
|
|
4839 for (tail = *backlist->args, i = 0;
|
|
|
4840 !NILP (tail);
|
|
|
4841 tail = Fcdr (tail), i++)
|
|
|
4842 {
|
|
|
4843 if (i != 0) write_c_string (" ", stream);
|
|
|
4844 Fprin1 (Fcar (tail), stream);
|
|
|
4845 }
|
|
|
4846 NUNGCPRO;
|
|
|
4847 }
|
|
|
4848 else
|
|
|
4849 {
|
|
|
4850 int i;
|
|
|
4851 for (i = 0; i < backlist->nargs; i++)
|
|
|
4852 {
|
|
|
4853 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
4854 write_c_string("\"...\"", stream);
|
|
|
4855 continue;
|
|
|
4856 }
|
|
|
4857 if (i != 0) write_c_string (" ", stream);
|
|
|
4858 Fprin1 (backlist->args[i], stream);
|
|
|
4859 }
|
|
|
4860 }
|
|
|
4861 }
|
|
|
4862 write_c_string (")\n", stream);
|
|
|
4863 backlist = backlist->next;
|
|
|
4864 }
|
|
|
4865 }
|
|
|
4866 Vprint_level = old_level;
|
|
|
4867 print_readably = old_pr;
|
|
|
4868 print_escape_newlines = old_nl;
|
|
|
4869 UNGCPRO;
|
|
|
4870 Vinhibit_quit = oiq;
|
|
|
4871 return Qnil;
|
|
|
4872 }
|
|
|
4873
|
|
|
4874
|
|
|
4875 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
|
4876 Return the function and arguments N frames up from current execution point.
|
|
|
4877 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
4878 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
4879 If that frame has evaluated its arguments and called its function already,
|
|
|
4880 the value is (t FUNCTION ARG-VALUES...).
|
|
|
4881 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
4882 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
4883 or a lambda expression for macro calls.
|
|
|
4884 If N is more than the number of frames, the value is nil.
|
|
|
4885 */
|
|
|
4886 (nframes))
|
|
|
4887 {
|
|
|
4888 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4889 REGISTER int i;
|
|
|
4890 Lisp_Object tem;
|
|
|
4891
|
|
|
4892 CHECK_NATNUM (nframes);
|
|
|
4893
|
|
|
4894 /* Find the frame requested. */
|
|
|
4895 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
4896 backlist = backlist->next;
|
|
|
4897
|
|
|
4898 if (!backlist)
|
|
|
4899 return Qnil;
|
|
|
4900 if (backlist->nargs == UNEVALLED)
|
|
|
4901 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
4902 else
|
|
|
4903 {
|
|
|
4904 if (backlist->nargs == MANY)
|
|
|
4905 tem = *backlist->args;
|
|
|
4906 else
|
|
|
4907 tem = Flist (backlist->nargs, backlist->args);
|
|
|
4908
|
|
|
4909 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
4910 }
|
|
|
4911 }
|
|
|
4912
|
|
|
4913
|
|
|
4914 /************************************************************************/
|
|
|
4915 /* Warnings */
|
|
|
4916 /************************************************************************/
|
|
|
4917
|
|
|
4918 void
|
|
|
4919 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
4920 Lisp_Object obj)
|
|
|
4921 {
|
|
|
4922 obj = list1 (list3 (class, level, obj));
|
|
|
4923 if (NILP (Vpending_warnings))
|
|
|
4924 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
4925 else
|
|
|
4926 {
|
|
|
4927 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
4928 Vpending_warnings_tail = obj;
|
|
|
4929 }
|
|
|
4930 }
|
|
|
4931
|
|
|
4932 /* #### This should probably accept Lisp objects; but then we have
|
|
|
4933 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
4934
|
|
|
4935 An alternative approach is to just pass some non-string type of
|
|
|
4936 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
4937 automatically be called when it is safe to do so. */
|
|
|
4938
|
|
|
4939 void
|
|
|
4940 warn_when_safe (Lisp_Object class, Lisp_Object level, CONST char *fmt, ...)
|
|
|
4941 {
|
|
|
4942 Lisp_Object obj;
|
|
|
4943 va_list args;
|
|
|
4944
|
|
|
4945 va_start (args, fmt);
|
|
|
4946 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt),
|
|
|
4947 Qnil, -1, args);
|
|
|
4948 va_end (args);
|
|
|
4949
|
|
|
4950 warn_when_safe_lispobj (class, level, obj);
|
|
|
4951 }
|
|
|
4952
|
|
|
4953
|
|
|
4954
|
|
|
4955
|
|
|
4956 /************************************************************************/
|
|
|
4957 /* Initialization */
|
|
|
4958 /************************************************************************/
|
|
|
4959
|
|
|
4960 void
|
|
|
4961 syms_of_eval (void)
|
|
|
4962 {
|
|
|
4963 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
4964 defsymbol (&Qautoload, "autoload");
|
|
|
4965 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
4966 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
4967 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
4968 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
4969 defsymbol (&Qdebugger, "debugger");
|
|
|
4970 defsymbol (&Qmacro, "macro");
|
|
|
4971 defsymbol (&Qand_rest, "&rest");
|
|
|
4972 defsymbol (&Qand_optional, "&optional");
|
|
|
4973 /* Note that the process code also uses Qexit */
|
|
|
4974 defsymbol (&Qexit, "exit");
|
|
|
4975 defsymbol (&Qsetq, "setq");
|
|
|
4976 defsymbol (&Qinteractive, "interactive");
|
|
|
4977 defsymbol (&Qcommandp, "commandp");
|
|
|
4978 defsymbol (&Qdefun, "defun");
|
|
|
4979 defsymbol (&Qprogn, "progn");
|
|
|
4980 defsymbol (&Qvalues, "values");
|
|
|
4981 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
4982 defsymbol (&Qrun_hooks, "run-hooks");
|
|
|
4983 defsymbol (&Qif, "if");
|
|
|
4984
|
|
|
4985 DEFSUBR (For);
|
|
|
4986 DEFSUBR (Fand);
|
|
|
4987 DEFSUBR (Fif);
|
|
|
4988 DEFSUBR_MACRO (Fwhen);
|
|
|
4989 DEFSUBR_MACRO (Funless);
|
|
|
4990 DEFSUBR (Fcond);
|
|
|
4991 DEFSUBR (Fprogn);
|
|
|
4992 DEFSUBR (Fprog1);
|
|
|
4993 DEFSUBR (Fprog2);
|
|
|
4994 DEFSUBR (Fsetq);
|
|
|
4995 DEFSUBR (Fquote);
|
|
|
4996 DEFSUBR (Ffunction);
|
|
|
4997 DEFSUBR (Fdefun);
|
|
|
4998 DEFSUBR (Fdefmacro);
|
|
|
4999 DEFSUBR (Fdefvar);
|
|
|
5000 DEFSUBR (Fdefconst);
|
|
|
5001 DEFSUBR (Fuser_variable_p);
|
|
|
5002 DEFSUBR (Flet);
|
|
|
5003 DEFSUBR (FletX);
|
|
|
5004 DEFSUBR (Fwhile);
|
|
|
5005 DEFSUBR (Fmacroexpand_internal);
|
|
|
5006 DEFSUBR (Fcatch);
|
|
|
5007 DEFSUBR (Fthrow);
|
|
|
5008 DEFSUBR (Funwind_protect);
|
|
|
5009 DEFSUBR (Fcondition_case);
|
|
|
5010 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5011 DEFSUBR (Fsignal);
|
|
|
5012 DEFSUBR (Finteractive_p);
|
|
|
5013 DEFSUBR (Fcommandp);
|
|
|
5014 DEFSUBR (Fcommand_execute);
|
|
|
5015 DEFSUBR (Fautoload);
|
|
|
5016 DEFSUBR (Feval);
|
|
|
5017 DEFSUBR (Fapply);
|
|
|
5018 DEFSUBR (Ffuncall);
|
|
|
5019 DEFSUBR (Ffunctionp);
|
|
|
5020 DEFSUBR (Ffunction_min_args);
|
|
|
5021 DEFSUBR (Ffunction_max_args);
|
|
|
5022 DEFSUBR (Frun_hooks);
|
|
|
5023 DEFSUBR (Frun_hook_with_args);
|
|
|
5024 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5025 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5026 DEFSUBR (Fbacktrace_debug);
|
|
|
5027 DEFSUBR (Fbacktrace);
|
|
|
5028 DEFSUBR (Fbacktrace_frame);
|
|
|
5029 }
|
|
|
5030
|
|
|
5031 void
|
|
|
5032 reinit_eval (void)
|
|
|
5033 {
|
|
|
5034 specpdl_ptr = specpdl;
|
|
|
5035 specpdl_depth_counter = 0;
|
|
|
5036 catchlist = 0;
|
|
|
5037 Vcondition_handlers = Qnil;
|
|
|
5038 backtrace_list = 0;
|
|
|
5039 Vquit_flag = Qnil;
|
|
|
5040 debug_on_next_call = 0;
|
|
|
5041 lisp_eval_depth = 0;
|
|
|
5042 entering_debugger = 0;
|
|
|
5043 }
|
|
|
5044
|
|
|
5045 void
|
|
|
5046 reinit_vars_of_eval (void)
|
|
|
5047 {
|
|
|
5048 preparing_for_armageddon = 0;
|
|
|
5049 in_warnings = 0;
|
|
|
5050 Qunbound_suspended_errors_tag = make_opaque_ptr (&Qunbound_suspended_errors_tag);
|
|
|
5051 staticpro_nodump (&Qunbound_suspended_errors_tag);
|
|
|
5052
|
|
|
5053 specpdl_size = 50;
|
|
|
5054 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
5055 /* XEmacs change: increase these values. */
|
|
|
5056 max_specpdl_size = 3000;
|
|
|
5057 max_lisp_eval_depth = 500;
|
|
|
5058 #if 0 /* no longer used */
|
|
|
5059 throw_level = 0;
|
|
|
5060 #endif
|
|
|
5061 }
|
|
|
5062
|
|
|
5063 void
|
|
|
5064 vars_of_eval (void)
|
|
|
5065 {
|
|
|
5066 reinit_vars_of_eval ();
|
|
|
5067
|
|
|
5068 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5069 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5070 */ );
|
|
|
5071
|
|
|
5072 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5073 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5074 This limit is to catch infinite recursions for you before they cause
|
|
|
5075 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5076 You can safely make it considerably larger than its default value,
|
|
|
5077 if that proves inconveniently small.
|
|
|
5078 */ );
|
|
|
5079
|
|
|
5080 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5081 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5082 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5083 */ );
|
|
|
5084 Vquit_flag = Qnil;
|
|
|
5085
|
|
|
5086 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5087 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5088 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5089 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5090 To prevent this happening, set `quit-flag' to nil
|
|
|
5091 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5092 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5093 an X frame.
|
|
|
5094 */ );
|
|
|
5095 Vinhibit_quit = Qnil;
|
|
|
5096
|
|
|
5097 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5098 *Non-nil means automatically display a backtrace buffer
|
|
|
5099 after any error that is not handled by a `condition-case'.
|
|
|
5100 If the value is a list, an error only means to display a backtrace
|
|
|
5101 if one of its condition symbols appears in the list.
|
|
|
5102 See also variable `stack-trace-on-signal'.
|
|
|
5103 */ );
|
|
|
5104 Vstack_trace_on_error = Qnil;
|
|
|
5105
|
|
|
5106 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5107 *Non-nil means automatically display a backtrace buffer
|
|
|
5108 after any error that is signalled, whether or not it is handled by
|
|
|
5109 a `condition-case'.
|
|
|
5110 If the value is a list, an error only means to display a backtrace
|
|
|
5111 if one of its condition symbols appears in the list.
|
|
|
5112 See also variable `stack-trace-on-error'.
|
|
|
5113 */ );
|
|
|
5114 Vstack_trace_on_signal = Qnil;
|
|
|
5115
|
|
|
5116 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5117 *List of errors for which the debugger should not be called.
|
|
|
5118 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5119 If any element applies to a given error, that error skips the debugger
|
|
|
5120 and just returns to top level.
|
|
|
5121 This overrides the variable `debug-on-error'.
|
|
|
5122 It does not apply to errors handled by `condition-case'.
|
|
|
5123 */ );
|
|
|
5124 Vdebug_ignored_errors = Qnil;
|
|
|
5125
|
|
|
5126 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5127 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5128 The debugger will not be entered if the error is handled by
|
|
|
5129 a `condition-case'.
|
|
|
5130 If the value is a list, an error only means to enter the debugger
|
|
|
5131 if one of its condition symbols appears in the list.
|
|
|
5132 This variable is overridden by `debug-ignored-errors'.
|
|
|
5133 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5134 */ );
|
|
|
5135 Vdebug_on_error = Qnil;
|
|
|
5136
|
|
|
5137 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5138 *Non-nil means enter debugger if an error is signalled.
|
|
|
5139 The debugger will be entered whether or not the error is handled by
|
|
|
5140 a `condition-case'.
|
|
|
5141 If the value is a list, an error only means to enter the debugger
|
|
|
5142 if one of its condition symbols appears in the list.
|
|
|
5143 See also variable `debug-on-quit'.
|
|
|
5144 */ );
|
|
|
5145 Vdebug_on_signal = Qnil;
|
|
|
5146
|
|
|
5147 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5148 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5149 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5150 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5151 control-shift-G to signal a critical quit.
|
|
|
5152 */ );
|
|
|
5153 debug_on_quit = 0;
|
|
|
5154
|
|
|
5155 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5156 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5157 */ );
|
|
|
5158
|
|
|
5159 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5160 Function to call to invoke debugger.
|
|
|
5161 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5162 this function's value will be returned instead of that.
|
|
|
5163 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5164 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5165 If due to `eval' entry, one arg, t.
|
|
|
5166 */ );
|
|
|
5167 Vdebugger = Qnil;
|
|
|
5168
|
|
|
5169 staticpro (&Vpending_warnings);
|
|
|
5170 Vpending_warnings = Qnil;
|
|
|
5171 pdump_wire (&Vpending_warnings_tail);
|
|
|
5172 Vpending_warnings_tail = Qnil;
|
|
|
5173
|
|
|
5174 staticpro (&Vautoload_queue);
|
|
|
5175 Vautoload_queue = Qnil;
|
|
|
5176
|
|
|
5177 staticpro (&Vcondition_handlers);
|
|
|
5178
|
|
|
5179 staticpro (&Vcurrent_warning_class);
|
|
|
5180 Vcurrent_warning_class = Qnil;
|
|
|
5181
|
|
|
5182 staticpro (&Vcurrent_error_state);
|
|
|
5183 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5184
|
|
|
5185 reinit_eval ();
|
|
|
5186 }
|
