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0
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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23
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24 #include <config.h>
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25 #include "lisp.h"
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26
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27 #include "commands.h"
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28 #include "backtrace.h"
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29 #include "bytecode.h"
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30 #include "buffer.h"
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31 #include "console.h"
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32 #include "opaque.h"
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33
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380
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34 #ifdef ERROR_CHECK_GC
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35 int always_gc; /* Debugging hack */
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36 #else
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37 #define always_gc 0
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38 #endif
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39
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0
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40 struct backtrace *backtrace_list;
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41
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380
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42 /* Note: you must always fill in all of the fields in a backtrace structure
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116
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43 before pushing them on the backtrace_list. The profiling code depends
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44 on this. */
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45
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380
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46 #define PUSH_BACKTRACE(bt) do { \
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47 (bt).next = backtrace_list; \
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48 backtrace_list = &(bt); \
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49 } while (0)
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50
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51 #define POP_BACKTRACE(bt) do { \
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52 backtrace_list = (bt).next; \
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53 } while (0)
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54
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55 /* Macros for calling subrs with an argument list whose length is only
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56 known at runtime. See EXFUN and DEFUN for similar hackery. */
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57
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58 #define AV_0(av)
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59 #define AV_1(av) av[0]
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60 #define AV_2(av) AV_1(av), av[1]
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61 #define AV_3(av) AV_2(av), av[2]
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62 #define AV_4(av) AV_3(av), av[3]
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63 #define AV_5(av) AV_4(av), av[4]
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64 #define AV_6(av) AV_5(av), av[5]
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65 #define AV_7(av) AV_6(av), av[6]
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66 #define AV_8(av) AV_7(av), av[7]
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67
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68 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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69 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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70
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71 /* If subrs take more than 8 arguments, more cases need to be added
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72 to this switch. (But wait - don't do it - if you really need
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73 a SUBR with more than 8 arguments, use max_args == MANY.
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74 See the DEFUN macro in lisp.h) */
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75 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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398
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76 void (*PF_fn)(void) = (void (*)(void)) fn; \
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380
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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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398
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80 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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380
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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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116
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95
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0
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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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185
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114
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0
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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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272
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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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0
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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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380
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129 Lisp_Object Qif;
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0
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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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380
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157 int specpdl_size;
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0
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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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380
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165 /* specpdl_ptr - specpdl */
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166 int specpdl_depth_counter;
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0
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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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398
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172 static int lisp_eval_depth;
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0
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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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163
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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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0
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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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185
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221 This is to prevent recursive attempts.
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0
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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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380
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269
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404
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270 #define DEFEND_AGAINST_THROW_RECURSION
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271
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272 #ifdef DEFEND_AGAINST_THROW_RECURSION
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0
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273 /* Used for error catching purposes by throw_or_bomb_out */
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274 static int throw_level;
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404
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275 #endif
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276
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277 #ifdef ERROR_CHECK_TYPECHECK
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278 void check_error_state_sanity (void);
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279 #endif
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0
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280
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281
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380
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282 /************************************************************************/
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283 /* The subr object type */
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284 /************************************************************************/
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285
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286 static void
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287 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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288 {
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380
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289 Lisp_Subr *subr = XSUBR (obj);
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398
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290 const char *header =
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380
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291 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
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398
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292 const char *name = subr_name (subr);
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293 const char *trailer = subr->prompt ? " (interactive)>" : ">";
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0
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294
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295 if (print_readably)
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380
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296 error ("printing unreadable object %s%s%s", header, name, trailer);
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297
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298 write_c_string (header, printcharfun);
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299 write_c_string (name, printcharfun);
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300 write_c_string (trailer, printcharfun);
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0
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301 }
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302
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398
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303 static const struct lrecord_description subr_description[] = {
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304 { XD_DOC_STRING, offsetof (Lisp_Subr, doc) },
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305 { XD_END }
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306 };
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307
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308 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
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400
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309 0, print_subr, 0, 0, 0,
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398
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310 subr_description,
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311 Lisp_Subr);
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0
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312
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380
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313 /************************************************************************/
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314 /* Entering the debugger */
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315 /************************************************************************/
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0
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316
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317 /* unwind-protect used by call_debugger() to restore the value of
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380
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318 entering_debugger. (We cannot use specbind() because the
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0
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319 variable is not Lisp-accessible.) */
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320
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321 static Lisp_Object
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322 restore_entering_debugger (Lisp_Object arg)
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323 {
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179
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324 entering_debugger = ! NILP (arg);
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0
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325 return arg;
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326 }
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327
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328 /* Actually call the debugger. ARG is a list of args that will be
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329 passed to the debugger function, as follows;
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330
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331 If due to frame exit, args are `exit' and the value being returned;
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332 this function's value will be returned instead of that.
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333 If due to error, args are `error' and a list of the args to `signal'.
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334 If due to `apply' or `funcall' entry, one arg, `lambda'.
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335 If due to `eval' entry, one arg, t.
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336
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337 */
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338
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339 static Lisp_Object
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340 call_debugger_259 (Lisp_Object arg)
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341 {
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342 return apply1 (Vdebugger, arg);
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343 }
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344
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345 /* Call the debugger, doing some encapsulation. We make sure we have
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380
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346 some room on the eval and specpdl stacks, and bind entering_debugger
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0
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347 to 1 during this call. This is used to trap errors that may occur
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380
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348 when entering the debugger (e.g. the value of `debugger' is invalid),
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0
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349 so that the debugger will not be recursively entered if debug-on-error
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350 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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380
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351 enter the debugger.) entering_debugger gets reset to 0 as soon
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0
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352 as a backtrace is displayed, so that further errors can indeed be
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353 handled normally.
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354
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355 We also establish a catch for 'debugger. If the debugger function
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356 throws to this instead of returning a value, it means that the user
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357 pressed 'c' (pretend like the debugger was never entered). The
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358 function then returns Qunbound. (If the user pressed 'r', for
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359 return a value, then the debugger function returns normally with
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360 this value.)
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361
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362 The difference between 'c' and 'r' is as follows:
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363
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364 debug-on-call:
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365 No difference. The call proceeds as normal.
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366 debug-on-exit:
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367 With 'r', the specified value is returned as the function's
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368 return value. With 'c', the value that would normally be
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369 returned is returned.
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370 signal:
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371 With 'r', the specified value is returned as the return
|
|
|
372 value of `signal'. (This is the only time that `signal'
|
|
|
373 can return, instead of making a non-local exit.) With `c',
|
|
|
374 `signal' will continue looking for handlers as if the
|
|
|
375 debugger was never entered, and will probably end up
|
|
|
376 throwing to a handler or to top-level.
|
|
|
377 */
|
|
|
378
|
|
|
379 static Lisp_Object
|
|
|
380 call_debugger (Lisp_Object arg)
|
|
|
381 {
|
|
|
382 int threw;
|
|
|
383 Lisp_Object val;
|
|
|
384 int speccount;
|
|
|
385
|
|
|
386 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
387 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
388 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
389 max_specpdl_size = specpdl_size + 40;
|
|
|
390 debug_on_next_call = 0;
|
|
|
391
|
|
380
|
392 speccount = specpdl_depth();
|
|
185
|
393 record_unwind_protect (restore_entering_debugger,
|
|
0
|
394 (entering_debugger ? Qt : Qnil));
|
|
|
395 entering_debugger = 1;
|
|
|
396 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
397
|
|
185
|
398 return unbind_to (speccount, ((threw)
|
|
179
|
399 ? Qunbound /* Not returning a value */
|
|
|
400 : val));
|
|
0
|
401 }
|
|
|
402
|
|
|
403 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
404 with the appropriate args for this. VAL is the exit value that is
|
|
|
405 about to be returned. */
|
|
|
406
|
|
|
407 static Lisp_Object
|
|
|
408 do_debug_on_exit (Lisp_Object val)
|
|
|
409 {
|
|
|
410 /* This is falsified by call_debugger */
|
|
|
411 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
94
|
412
|
|
173
|
413 return !UNBOUNDP (v) ? v : val;
|
|
0
|
414 }
|
|
|
415
|
|
|
416 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
417 with the appropriate args for this. VAL is either t for a call
|
|
|
418 through `eval' or 'lambda for a call through `funcall'.
|
|
|
419
|
|
|
420 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
421 FUNCALL can be defined as
|
|
|
422
|
|
|
423 (defmacro func (fun &rest args)
|
|
|
424 (cons (eval fun) args))
|
|
|
425
|
|
|
426 and should be treated as such.
|
|
|
427 */
|
|
|
428
|
|
|
429 static void
|
|
|
430 do_debug_on_call (Lisp_Object code)
|
|
|
431 {
|
|
|
432 debug_on_next_call = 0;
|
|
|
433 backtrace_list->debug_on_exit = 1;
|
|
|
434 call_debugger (list1 (code));
|
|
|
435 }
|
|
|
436
|
|
|
437 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
438 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
439 and CONDITIONS is the list of error conditions associated with
|
|
|
440 the error being signalled. This returns non-nil if LIST
|
|
|
441 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
442 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
443 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
444 same as one of the symbols in CONDITIONS.) */
|
|
|
445
|
|
|
446 static int
|
|
|
447 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
448 {
|
|
|
449 if (NILP (list))
|
|
|
450 return 0;
|
|
|
451 if (! CONSP (list))
|
|
|
452 return 1;
|
|
|
453
|
|
|
454 while (CONSP (conditions))
|
|
|
455 {
|
|
|
456 Lisp_Object this, tail;
|
|
|
457 this = XCAR (conditions);
|
|
|
458 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
459 if (EQ (XCAR (tail), this))
|
|
|
460 return 1;
|
|
|
461 conditions = XCDR (conditions);
|
|
|
462 }
|
|
|
463 return 0;
|
|
|
464 }
|
|
|
465
|
|
163
|
466
|
|
|
467 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
468 and described by SIGNAL-DATA, should skip the debugger
|
|
|
469 according to debugger-ignore-errors. */
|
|
|
470
|
|
|
471 static int
|
|
|
472 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
473 {
|
|
167
|
474 /* This function can GC */
|
|
163
|
475 Lisp_Object tail;
|
|
|
476 int first_string = 1;
|
|
173
|
477 Lisp_Object error_message = Qnil;
|
|
163
|
478
|
|
|
479 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
480 {
|
|
|
481 if (STRINGP (XCAR (tail)))
|
|
|
482 {
|
|
|
483 if (first_string)
|
|
|
484 {
|
|
165
|
485 error_message = Ferror_message_string (data);
|
|
163
|
486 first_string = 0;
|
|
|
487 }
|
|
167
|
488 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
163
|
489 return 1;
|
|
|
490 }
|
|
|
491 else
|
|
|
492 {
|
|
|
493 Lisp_Object contail;
|
|
|
494
|
|
|
495 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
167
|
496 if (EQ (XCAR (tail), XCAR (contail)))
|
|
163
|
497 return 1;
|
|
|
498 }
|
|
|
499 }
|
|
|
500
|
|
|
501 return 0;
|
|
|
502 }
|
|
|
503
|
|
0
|
504 /* Actually generate a backtrace on STREAM. */
|
|
|
505
|
|
|
506 static Lisp_Object
|
|
|
507 backtrace_259 (Lisp_Object stream)
|
|
|
508 {
|
|
173
|
509 return Fbacktrace (stream, Qt);
|
|
0
|
510 }
|
|
|
511
|
|
272
|
512 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
0
|
513 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
514 associated with the error being signalled. SIG is the actual error
|
|
|
515 being signalled, and DATA is the associated data (these are exactly
|
|
|
516 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
517 list of error handlers that are to be put in place while the debugger
|
|
|
518 is called. This is generally the remaining handlers that are
|
|
|
519 outside of the innermost handler trapping this error. This way,
|
|
|
520 if the same error occurs inside of the debugger, you usually don't get
|
|
|
521 the debugger entered recursively.
|
|
|
522
|
|
|
523 This function returns Qunbound if it didn't call the debugger or if
|
|
|
524 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
525 debugger was never entered. Otherwise, it returns the value
|
|
|
526 that the user specified with `r'. (Note that much of the time,
|
|
|
527 the user will abort with C-], and we will never have a chance to
|
|
|
528 return anything at all.)
|
|
|
529
|
|
|
530 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
531 and stack-trace-on-signal to control whether we do anything.
|
|
|
532 This is so that debug-on-error doesn't make handled errors
|
|
|
533 cause the debugger to get invoked.
|
|
|
534
|
|
|
535 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
536 those functions aren't done more than once in a single `signal'
|
|
|
537 session. */
|
|
|
538
|
|
|
539 static Lisp_Object
|
|
|
540 signal_call_debugger (Lisp_Object conditions,
|
|
|
541 Lisp_Object sig, Lisp_Object data,
|
|
|
542 Lisp_Object active_handlers,
|
|
|
543 int signal_vars_only,
|
|
|
544 int *stack_trace_displayed,
|
|
|
545 int *debugger_entered)
|
|
|
546 {
|
|
|
547 /* This function can GC */
|
|
|
548 Lisp_Object val = Qunbound;
|
|
|
549 Lisp_Object all_handlers = Vcondition_handlers;
|
|
167
|
550 Lisp_Object temp_data = Qnil;
|
|
380
|
551 int speccount = specpdl_depth();
|
|
167
|
552 struct gcpro gcpro1, gcpro2;
|
|
|
553 GCPRO2 (all_handlers, temp_data);
|
|
0
|
554
|
|
|
555 Vcondition_handlers = active_handlers;
|
|
|
556
|
|
167
|
557 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
163
|
558
|
|
|
559 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
167
|
560 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
561 && !skip_debugger (conditions, temp_data))
|
|
0
|
562 {
|
|
380
|
563 specbind (Qdebug_on_error, Qnil);
|
|
|
564 specbind (Qstack_trace_on_error, Qnil);
|
|
|
565 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
566 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
567
|
|
380
|
568 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
569 backtrace_259,
|
|
|
570 Qnil,
|
|
|
571 Qnil);
|
|
|
572 unbind_to (speccount, Qnil);
|
|
|
573 *stack_trace_displayed = 1;
|
|
|
574 }
|
|
185
|
575
|
|
0
|
576 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
577 && (EQ (sig, Qquit)
|
|
|
578 ? debug_on_quit
|
|
167
|
579 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
580 && !skip_debugger (conditions, temp_data))
|
|
0
|
581 {
|
|
|
582 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
583 specbind (Qdebug_on_error, Qnil);
|
|
|
584 specbind (Qstack_trace_on_error, Qnil);
|
|
|
585 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
586 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
587
|
|
0
|
588 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
589 *debugger_entered = 1;
|
|
|
590 }
|
|
|
591
|
|
|
592 if (!entering_debugger && !*stack_trace_displayed
|
|
|
593 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
594 {
|
|
380
|
595 specbind (Qdebug_on_error, Qnil);
|
|
|
596 specbind (Qstack_trace_on_error, Qnil);
|
|
|
597 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
598 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
599
|
|
380
|
600 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
601 backtrace_259,
|
|
|
602 Qnil,
|
|
|
603 Qnil);
|
|
|
604 unbind_to (speccount, Qnil);
|
|
|
605 *stack_trace_displayed = 1;
|
|
|
606 }
|
|
|
607
|
|
|
608 if (!entering_debugger && !*debugger_entered
|
|
|
609 && (EQ (sig, Qquit)
|
|
|
610 ? debug_on_quit
|
|
|
611 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
612 {
|
|
|
613 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
614 specbind (Qdebug_on_error, Qnil);
|
|
|
615 specbind (Qstack_trace_on_error, Qnil);
|
|
|
616 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
617 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
618
|
|
0
|
619 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
620 *debugger_entered = 1;
|
|
|
621 }
|
|
|
622
|
|
|
623 UNGCPRO;
|
|
|
624 Vcondition_handlers = all_handlers;
|
|
173
|
625 return unbind_to (speccount, val);
|
|
0
|
626 }
|
|
|
627
|
|
|
628
|
|
380
|
629 /************************************************************************/
|
|
|
630 /* The basic special forms */
|
|
|
631 /************************************************************************/
|
|
|
632
|
|
|
633 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
634 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
0
|
635
|
|
20
|
636 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
637 Eval args until one of them yields non-nil, then return that value.
|
|
|
638 The remaining args are not evalled at all.
|
|
|
639 If all args return nil, return nil.
|
|
20
|
640 */
|
|
|
641 (args))
|
|
0
|
642 {
|
|
|
643 /* This function can GC */
|
|
380
|
644 REGISTER Lisp_Object arg, val;
|
|
|
645
|
|
|
646 LIST_LOOP_2 (arg, args)
|
|
0
|
647 {
|
|
380
|
648 if (!NILP (val = Feval (arg)))
|
|
|
649 return val;
|
|
0
|
650 }
|
|
|
651
|
|
272
|
652 return Qnil;
|
|
0
|
653 }
|
|
|
654
|
|
20
|
655 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
656 Eval args until one of them yields nil, then return nil.
|
|
|
657 The remaining args are not evalled at all.
|
|
|
658 If no arg yields nil, return the last arg's value.
|
|
20
|
659 */
|
|
|
660 (args))
|
|
0
|
661 {
|
|
|
662 /* This function can GC */
|
|
380
|
663 REGISTER Lisp_Object arg, val = Qt;
|
|
|
664
|
|
|
665 LIST_LOOP_2 (arg, args)
|
|
0
|
666 {
|
|
380
|
667 if (NILP (val = Feval (arg)))
|
|
|
668 return val;
|
|
0
|
669 }
|
|
|
670
|
|
|
671 return val;
|
|
|
672 }
|
|
|
673
|
|
20
|
674 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
272
|
675 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
0
|
676 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
677 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
678 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
679 */
|
|
272
|
680 (args))
|
|
0
|
681 {
|
|
|
682 /* This function can GC */
|
|
380
|
683 Lisp_Object condition = XCAR (args);
|
|
|
684 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
685 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
686
|
|
|
687 if (!NILP (Feval (condition)))
|
|
|
688 return Feval (then_form);
|
|
272
|
689 else
|
|
380
|
690 return Fprogn (else_forms);
|
|
|
691 }
|
|
|
692
|
|
|
693 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
694 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
695
|
|
|
696 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
697 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
698 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
699 */
|
|
|
700 (int nargs, Lisp_Object *args))
|
|
|
701 {
|
|
|
702 Lisp_Object cond = args[0];
|
|
|
703 Lisp_Object body;
|
|
|
704
|
|
|
705 switch (nargs)
|
|
|
706 {
|
|
|
707 case 1: body = Qnil; break;
|
|
|
708 case 2: body = args[1]; break;
|
|
|
709 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
710 }
|
|
|
711
|
|
|
712 return list3 (Qif, cond, body);
|
|
|
713 }
|
|
|
714
|
|
|
715 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
716 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
717 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
718 */
|
|
|
719 (int nargs, Lisp_Object *args))
|
|
|
720 {
|
|
|
721 Lisp_Object cond = args[0];
|
|
|
722 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
723 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
0
|
724 }
|
|
|
725
|
|
20
|
726 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
727 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
728 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
729 and, if the value is non-nil, this clause succeeds:
|
|
|
730 then the expressions in BODY are evaluated and the last one's
|
|
|
731 value is the value of the cond-form.
|
|
|
732 If no clause succeeds, cond returns nil.
|
|
|
733 If a clause has one element, as in (CONDITION),
|
|
|
734 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
735 */
|
|
|
736 (args))
|
|
0
|
737 {
|
|
|
738 /* This function can GC */
|
|
380
|
739 REGISTER Lisp_Object val, clause;
|
|
|
740
|
|
|
741 LIST_LOOP_2 (clause, args)
|
|
0
|
742 {
|
|
272
|
743 CHECK_CONS (clause);
|
|
380
|
744 if (!NILP (val = Feval (XCAR (clause))))
|
|
0
|
745 {
|
|
380
|
746 if (!NILP (clause = XCDR (clause)))
|
|
272
|
747 {
|
|
380
|
748 CHECK_TRUE_LIST (clause);
|
|
|
749 val = Fprogn (clause);
|
|
272
|
750 }
|
|
|
751 return val;
|
|
0
|
752 }
|
|
|
753 }
|
|
|
754
|
|
272
|
755 return Qnil;
|
|
0
|
756 }
|
|
|
757
|
|
20
|
758 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
272
|
759 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
760 */
|
|
|
761 (args))
|
|
0
|
762 {
|
|
|
763 /* This function can GC */
|
|
380
|
764 /* Caller must provide a true list in ARGS */
|
|
|
765 REGISTER Lisp_Object form, val = Qnil;
|
|
0
|
766 struct gcpro gcpro1;
|
|
|
767
|
|
243
|
768 GCPRO1 (args);
|
|
|
769
|
|
380
|
770 {
|
|
|
771 LIST_LOOP_2 (form, args)
|
|
|
772 val = Feval (form);
|
|
|
773 }
|
|
0
|
774
|
|
|
775 UNGCPRO;
|
|
|
776 return val;
|
|
|
777 }
|
|
|
778
|
|
380
|
779 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
780 Lisp_Object across calls to Feval(). */
|
|
|
781
|
|
20
|
782 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
380
|
783 Similar to `progn', but the value of the first form is returned.
|
|
|
784 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
785 The value of FIRST is saved during evaluation of the remaining args,
|
|
0
|
786 whose values are discarded.
|
|
20
|
787 */
|
|
|
788 (args))
|
|
0
|
789 {
|
|
|
790 /* This function can GC */
|
|
380
|
791 REGISTER Lisp_Object val, form;
|
|
|
792 struct gcpro gcpro1;
|
|
|
793
|
|
|
794 val = Feval (XCAR (args));
|
|
|
795
|
|
|
796 GCPRO1 (val);
|
|
|
797
|
|
|
798 {
|
|
|
799 LIST_LOOP_2 (form, XCDR (args))
|
|
|
800 Feval (form);
|
|
|
801 }
|
|
0
|
802
|
|
|
803 UNGCPRO;
|
|
|
804 return val;
|
|
|
805 }
|
|
|
806
|
|
20
|
807 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
380
|
808 Similar to `progn', but the value of the second form is returned.
|
|
|
809 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
810 The value of SECOND is saved during evaluation of the remaining args,
|
|
0
|
811 whose values are discarded.
|
|
20
|
812 */
|
|
|
813 (args))
|
|
0
|
814 {
|
|
|
815 /* This function can GC */
|
|
380
|
816 REGISTER Lisp_Object val, form, tail;
|
|
|
817 struct gcpro gcpro1;
|
|
|
818
|
|
|
819 Feval (XCAR (args));
|
|
|
820 args = XCDR (args);
|
|
|
821 val = Feval (XCAR (args));
|
|
|
822 args = XCDR (args);
|
|
|
823
|
|
|
824 GCPRO1 (val);
|
|
|
825
|
|
|
826 LIST_LOOP_3 (form, args, tail)
|
|
|
827 Feval (form);
|
|
0
|
828
|
|
|
829 UNGCPRO;
|
|
|
830 return val;
|
|
|
831 }
|
|
|
832
|
|
20
|
833 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
272
|
834 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
835 The value of the last form in BODY is returned.
|
|
|
836 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
837 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
838 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
839 */
|
|
|
840 (args))
|
|
0
|
841 {
|
|
|
842 /* This function can GC */
|
|
380
|
843 Lisp_Object var, tail;
|
|
272
|
844 Lisp_Object varlist = XCAR (args);
|
|
380
|
845 Lisp_Object body = XCDR (args);
|
|
|
846 int speccount = specpdl_depth();
|
|
|
847
|
|
|
848 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
849 {
|
|
380
|
850 Lisp_Object symbol, value, tem;
|
|
|
851 if (SYMBOLP (var))
|
|
|
852 symbol = var, value = Qnil;
|
|
0
|
853 else
|
|
|
854 {
|
|
380
|
855 CHECK_CONS (var);
|
|
|
856 symbol = XCAR (var);
|
|
|
857 tem = XCDR (var);
|
|
|
858 if (NILP (tem))
|
|
|
859 value = Qnil;
|
|
272
|
860 else
|
|
|
861 {
|
|
380
|
862 CHECK_CONS (tem);
|
|
|
863 value = Feval (XCAR (tem));
|
|
|
864 if (!NILP (XCDR (tem)))
|
|
272
|
865 signal_simple_error
|
|
380
|
866 ("`let' bindings can have only one value-form", var);
|
|
272
|
867 }
|
|
0
|
868 }
|
|
380
|
869 specbind (symbol, value);
|
|
0
|
870 }
|
|
380
|
871 return unbind_to (speccount, Fprogn (body));
|
|
0
|
872 }
|
|
|
873
|
|
20
|
874 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
272
|
875 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
876 The value of the last form in BODY is returned.
|
|
|
877 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
878 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
879 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
880 */
|
|
|
881 (args))
|
|
0
|
882 {
|
|
|
883 /* This function can GC */
|
|
380
|
884 Lisp_Object var, tail;
|
|
272
|
885 Lisp_Object varlist = XCAR (args);
|
|
380
|
886 Lisp_Object body = XCDR (args);
|
|
|
887 int speccount = specpdl_depth();
|
|
272
|
888 Lisp_Object *temps;
|
|
380
|
889 int idx;
|
|
|
890 struct gcpro gcpro1;
|
|
0
|
891
|
|
272
|
892 /* Make space to hold the values to give the bound variables. */
|
|
|
893 {
|
|
380
|
894 int varcount;
|
|
|
895 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
272
|
896 temps = alloca_array (Lisp_Object, varcount);
|
|
|
897 }
|
|
0
|
898
|
|
|
899 /* Compute the values and store them in `temps' */
|
|
380
|
900 GCPRO1 (*temps);
|
|
|
901 gcpro1.nvars = 0;
|
|
|
902
|
|
|
903 idx = 0;
|
|
|
904 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
905 {
|
|
380
|
906 Lisp_Object *value = &temps[idx++];
|
|
|
907 if (SYMBOLP (var))
|
|
|
908 *value = Qnil;
|
|
0
|
909 else
|
|
272
|
910 {
|
|
380
|
911 Lisp_Object tem;
|
|
|
912 CHECK_CONS (var);
|
|
|
913 tem = XCDR (var);
|
|
|
914 if (NILP (tem))
|
|
|
915 *value = Qnil;
|
|
272
|
916 else
|
|
|
917 {
|
|
380
|
918 CHECK_CONS (tem);
|
|
|
919 *value = Feval (XCAR (tem));
|
|
|
920 gcpro1.nvars = idx;
|
|
|
921
|
|
|
922 if (!NILP (XCDR (tem)))
|
|
272
|
923 signal_simple_error
|
|
380
|
924 ("`let' bindings can have only one value-form", var);
|
|
272
|
925 }
|
|
|
926 }
|
|
0
|
927 }
|
|
380
|
928
|
|
|
929 idx = 0;
|
|
|
930 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
931 {
|
|
380
|
932 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
0
|
933 }
|
|
|
934
|
|
380
|
935 UNGCPRO;
|
|
|
936
|
|
|
937 return unbind_to (speccount, Fprogn (body));
|
|
0
|
938 }
|
|
|
939
|
|
20
|
940 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
272
|
941 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
0
|
942 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
943 until TEST returns nil.
|
|
20
|
944 */
|
|
243
|
945 (args))
|
|
0
|
946 {
|
|
|
947 /* This function can GC */
|
|
272
|
948 Lisp_Object test = XCAR (args);
|
|
|
949 Lisp_Object body = XCDR (args);
|
|
380
|
950
|
|
|
951 while (!NILP (Feval (test)))
|
|
0
|
952 {
|
|
|
953 QUIT;
|
|
|
954 Fprogn (body);
|
|
|
955 }
|
|
|
956
|
|
|
957 return Qnil;
|
|
|
958 }
|
|
|
959
|
|
20
|
960 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
272
|
961 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
0
|
962 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
963 The values VAL are expressions; they are evaluated.
|
|
|
964 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
965 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
966 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
967 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
968 */
|
|
|
969 (args))
|
|
0
|
970 {
|
|
|
971 /* This function can GC */
|
|
380
|
972 Lisp_Object symbol, tail, val = Qnil;
|
|
|
973 int nargs;
|
|
0
|
974 struct gcpro gcpro1;
|
|
380
|
975
|
|
|
976 GET_LIST_LENGTH (args, nargs);
|
|
|
977
|
|
|
978 if (nargs & 1) /* Odd number of arguments? */
|
|
|
979 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
980
|
|
|
981 GCPRO1 (val);
|
|
|
982
|
|
|
983 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
0
|
984 {
|
|
380
|
985 val = Feval (val);
|
|
|
986 Fset (symbol, val);
|
|
0
|
987 }
|
|
|
988
|
|
|
989 UNGCPRO;
|
|
|
990 return val;
|
|
|
991 }
|
|
185
|
992
|
|
20
|
993 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
994 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
995 */
|
|
|
996 (args))
|
|
0
|
997 {
|
|
272
|
998 return XCAR (args);
|
|
0
|
999 }
|
|
185
|
1000
|
|
20
|
1001 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
1002 Like `quote', but preferred for objects which are functions.
|
|
|
1003 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1004 `quote' cannot do that.
|
|
20
|
1005 */
|
|
|
1006 (args))
|
|
0
|
1007 {
|
|
272
|
1008 return XCAR (args);
|
|
0
|
1009 }
|
|
|
1010
|
|
|
1011
|
|
380
|
1012 /************************************************************************/
|
|
|
1013 /* Defining functions/variables */
|
|
|
1014 /************************************************************************/
|
|
|
1015 static Lisp_Object
|
|
|
1016 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1017 {
|
|
|
1018 Ffset (name, defn);
|
|
|
1019 LOADHIST_ATTACH (name);
|
|
|
1020 return name;
|
|
|
1021 }
|
|
0
|
1022
|
|
20
|
1023 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
272
|
1024 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
0
|
1025 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1026 See also the function `interactive'.
|
|
20
|
1027 */
|
|
|
1028 (args))
|
|
0
|
1029 {
|
|
|
1030 /* This function can GC */
|
|
380
|
1031 return define_function (XCAR (args),
|
|
|
1032 Fcons (Qlambda, XCDR (args)));
|
|
0
|
1033 }
|
|
|
1034
|
|
20
|
1035 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
272
|
1036 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
0
|
1037 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1038 When the macro is called, as in (NAME ARGS...),
|
|
|
1039 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1040 the list ARGS... as it appears in the expression,
|
|
|
1041 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1042 */
|
|
|
1043 (args))
|
|
0
|
1044 {
|
|
|
1045 /* This function can GC */
|
|
380
|
1046 return define_function (XCAR (args),
|
|
|
1047 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
0
|
1048 }
|
|
|
1049
|
|
20
|
1050 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
272
|
1051 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
0
|
1052 You are not required to define a variable in order to use it,
|
|
|
1053 but the definition can supply documentation and an initial value
|
|
|
1054 in a way that tags can recognize.
|
|
|
1055
|
|
|
1056 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1057 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1058 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1059 void.)
|
|
|
1060 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1061 buffer-local values are not affected.
|
|
|
1062 INITVALUE and DOCSTRING are optional.
|
|
|
1063 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
371
|
1064 This means that M-x set-variable and M-x edit-options recognize it.
|
|
0
|
1065 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1066
|
|
|
1067 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1068 */
|
|
|
1069 (args))
|
|
0
|
1070 {
|
|
|
1071 /* This function can GC */
|
|
272
|
1072 Lisp_Object sym = XCAR (args);
|
|
|
1073
|
|
|
1074 if (!NILP (args = XCDR (args)))
|
|
0
|
1075 {
|
|
272
|
1076 Lisp_Object val = XCAR (args);
|
|
|
1077
|
|
|
1078 if (NILP (Fdefault_boundp (sym)))
|
|
380
|
1079 {
|
|
|
1080 struct gcpro gcpro1;
|
|
|
1081 GCPRO1 (val);
|
|
|
1082 val = Feval (val);
|
|
|
1083 Fset_default (sym, val);
|
|
|
1084 UNGCPRO;
|
|
|
1085 }
|
|
272
|
1086
|
|
|
1087 if (!NILP (args = XCDR (args)))
|
|
|
1088 {
|
|
|
1089 Lisp_Object doc = XCAR (args);
|
|
|
1090 Fput (sym, Qvariable_documentation, doc);
|
|
|
1091 if (!NILP (args = XCDR (args)))
|
|
|
1092 error ("too many arguments");
|
|
|
1093 }
|
|
0
|
1094 }
|
|
|
1095
|
|
|
1096 #ifdef I18N3
|
|
|
1097 if (!NILP (Vfile_domain))
|
|
398
|
1098 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
0
|
1099 #endif
|
|
|
1100
|
|
|
1101 LOADHIST_ATTACH (sym);
|
|
|
1102 return sym;
|
|
|
1103 }
|
|
|
1104
|
|
20
|
1105 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
272
|
1106 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
0
|
1107 variable.
|
|
|
1108 The intent is that programs do not change this value, but users may.
|
|
|
1109 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1110 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1111 buffer-local values are not affected.
|
|
|
1112 DOCSTRING is optional.
|
|
|
1113 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
371
|
1114 This means that M-x set-variable and M-x edit-options recognize it.
|
|
0
|
1115
|
|
|
1116 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1117 normally loaded, since it is useful for users to be able to specify
|
|
|
1118 their own values for such variables before loading the library.
|
|
|
1119 Since `defconst' unconditionally assigns the variable,
|
|
|
1120 it would override the user's choice.
|
|
20
|
1121 */
|
|
|
1122 (args))
|
|
0
|
1123 {
|
|
|
1124 /* This function can GC */
|
|
272
|
1125 Lisp_Object sym = XCAR (args);
|
|
380
|
1126 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1127 struct gcpro gcpro1;
|
|
|
1128
|
|
|
1129 GCPRO1 (val);
|
|
|
1130
|
|
|
1131 Fset_default (sym, val);
|
|
|
1132
|
|
|
1133 UNGCPRO;
|
|
272
|
1134
|
|
|
1135 if (!NILP (args = XCDR (args)))
|
|
|
1136 {
|
|
|
1137 Lisp_Object doc = XCAR (args);
|
|
|
1138 Fput (sym, Qvariable_documentation, doc);
|
|
|
1139 if (!NILP (args = XCDR (args)))
|
|
|
1140 error ("too many arguments");
|
|
|
1141 }
|
|
0
|
1142
|
|
|
1143 #ifdef I18N3
|
|
|
1144 if (!NILP (Vfile_domain))
|
|
398
|
1145 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
0
|
1146 #endif
|
|
|
1147
|
|
|
1148 LOADHIST_ATTACH (sym);
|
|
|
1149 return sym;
|
|
|
1150 }
|
|
|
1151
|
|
20
|
1152 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1153 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1154 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1155 Determined by whether the first character of the documentation
|
|
|
1156 for the variable is `*'.
|
|
20
|
1157 */
|
|
|
1158 (variable))
|
|
0
|
1159 {
|
|
380
|
1160 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1161
|
|
|
1162 return
|
|
|
1163 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1164
|
|
398
|
1165 (STRINGP (documentation) &&
|
|
380
|
1166 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1167
|
|
|
1168 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1169 (CONSP (documentation)
|
|
0
|
1170 && STRINGP (XCAR (documentation))
|
|
|
1171 && INTP (XCDR (documentation))
|
|
380
|
1172 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1173 Qt : Qnil;
|
|
185
|
1174 }
|
|
0
|
1175
|
|
20
|
1176 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1177 Return result of expanding macros at top level of FORM.
|
|
|
1178 If FORM is not a macro call, it is returned unchanged.
|
|
|
1179 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1180 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1181
|
|
371
|
1182 The second optional arg ENVIRONMENT species an environment of macro
|
|
0
|
1183 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1184 */
|
|
371
|
1185 (form, env))
|
|
0
|
1186 {
|
|
|
1187 /* This function can GC */
|
|
|
1188 /* With cleanups from Hallvard Furuseth. */
|
|
|
1189 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1190
|
|
|
1191 while (1)
|
|
|
1192 {
|
|
|
1193 /* Come back here each time we expand a macro call,
|
|
|
1194 in case it expands into another macro call. */
|
|
|
1195 if (!CONSP (form))
|
|
|
1196 break;
|
|
|
1197 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1198 def = sym = XCAR (form);
|
|
|
1199 tem = Qnil;
|
|
|
1200 /* Trace symbols aliases to other symbols
|
|
|
1201 until we get a symbol that is not an alias. */
|
|
|
1202 while (SYMBOLP (def))
|
|
|
1203 {
|
|
|
1204 QUIT;
|
|
|
1205 sym = def;
|
|
371
|
1206 tem = Fassq (sym, env);
|
|
0
|
1207 if (NILP (tem))
|
|
|
1208 {
|
|
|
1209 def = XSYMBOL (sym)->function;
|
|
|
1210 if (!UNBOUNDP (def))
|
|
|
1211 continue;
|
|
|
1212 }
|
|
|
1213 break;
|
|
|
1214 }
|
|
371
|
1215 /* Right now TEM is the result from SYM in ENV,
|
|
0
|
1216 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1217 if (NILP (tem))
|
|
|
1218 {
|
|
371
|
1219 /* SYM is not mentioned in ENV.
|
|
0
|
1220 Look at its function definition. */
|
|
|
1221 if (UNBOUNDP (def)
|
|
|
1222 || !CONSP (def))
|
|
|
1223 /* Not defined or definition not suitable */
|
|
|
1224 break;
|
|
|
1225 if (EQ (XCAR (def), Qautoload))
|
|
|
1226 {
|
|
|
1227 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1228 tem = Felt (def, make_int (4));
|
|
|
1229 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1230 {
|
|
|
1231 /* Yes, load it and try again. */
|
|
|
1232 do_autoload (def, sym);
|
|
|
1233 continue;
|
|
|
1234 }
|
|
|
1235 else
|
|
|
1236 break;
|
|
|
1237 }
|
|
|
1238 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1239 break;
|
|
|
1240 else expander = XCDR (def);
|
|
|
1241 }
|
|
|
1242 else
|
|
|
1243 {
|
|
|
1244 expander = XCDR (tem);
|
|
|
1245 if (NILP (expander))
|
|
|
1246 break;
|
|
|
1247 }
|
|
|
1248 form = apply1 (expander, XCDR (form));
|
|
|
1249 }
|
|
|
1250 return form;
|
|
|
1251 }
|
|
|
1252
|
|
|
1253
|
|
380
|
1254 /************************************************************************/
|
|
|
1255 /* Non-local exits */
|
|
|
1256 /************************************************************************/
|
|
0
|
1257
|
|
20
|
1258 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
272
|
1259 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
0
|
1260 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1261 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1262 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1263 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1264 */
|
|
|
1265 (args))
|
|
0
|
1266 {
|
|
|
1267 /* This function can GC */
|
|
380
|
1268 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1269 Lisp_Object body = XCDR (args);
|
|
|
1270 return internal_catch (tag, Fprogn, body, 0);
|
|
0
|
1271 }
|
|
|
1272
|
|
|
1273 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1274 FUNC should return a Lisp_Object.
|
|
|
1275 This is how catches are done from within C code. */
|
|
|
1276
|
|
|
1277 Lisp_Object
|
|
185
|
1278 internal_catch (Lisp_Object tag,
|
|
0
|
1279 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1280 Lisp_Object arg,
|
|
272
|
1281 int * volatile threw)
|
|
0
|
1282 {
|
|
|
1283 /* This structure is made part of the chain `catchlist'. */
|
|
|
1284 struct catchtag c;
|
|
|
1285
|
|
|
1286 /* Fill in the components of c, and put it on the list. */
|
|
|
1287 c.next = catchlist;
|
|
|
1288 c.tag = tag;
|
|
|
1289 c.val = Qnil;
|
|
|
1290 c.backlist = backtrace_list;
|
|
|
1291 #if 0 /* FSFmacs */
|
|
|
1292 /* #### */
|
|
|
1293 c.handlerlist = handlerlist;
|
|
|
1294 #endif
|
|
|
1295 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1296 c.pdlcount = specpdl_depth();
|
|
0
|
1297 #if 0 /* FSFmacs */
|
|
|
1298 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1299 #endif
|
|
|
1300 c.gcpro = gcprolist;
|
|
|
1301 catchlist = &c;
|
|
|
1302
|
|
|
1303 /* Call FUNC. */
|
|
|
1304 if (SETJMP (c.jmp))
|
|
|
1305 {
|
|
|
1306 /* Throw works by a longjmp that comes right here. */
|
|
|
1307 if (threw) *threw = 1;
|
|
173
|
1308 return c.val;
|
|
0
|
1309 }
|
|
|
1310 c.val = (*func) (arg);
|
|
|
1311 if (threw) *threw = 0;
|
|
|
1312 catchlist = c.next;
|
|
404
|
1313 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1314 check_error_state_sanity ();
|
|
|
1315 #endif
|
|
173
|
1316 return c.val;
|
|
0
|
1317 }
|
|
|
1318
|
|
|
1319
|
|
|
1320 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1321 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1322
|
|
|
1323 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1324 they choose the catch tag to throw to. A catch tag for a
|
|
|
1325 condition-case form has a TAG of Qnil.
|
|
|
1326
|
|
|
1327 Before each catch is discarded, unbind all special bindings and
|
|
|
1328 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1329 the handler stack as we go, so that the proper handlers are in
|
|
|
1330 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1331 some static info saved in CATCH, and longjmp to the location
|
|
|
1332 specified in the
|
|
|
1333
|
|
|
1334 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1335
|
|
|
1336 static void
|
|
|
1337 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1338 {
|
|
|
1339 #if 0 /* FSFmacs */
|
|
|
1340 /* #### */
|
|
203
|
1341 REGISTER int last_time;
|
|
0
|
1342 #endif
|
|
|
1343
|
|
|
1344 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1345 Before each catch is discarded, unbind all special bindings
|
|
|
1346 and execute all unwind-protect clauses made above that catch.
|
|
|
1347 At the end, restore some static info saved in CATCH,
|
|
|
1348 and longjmp to the location specified.
|
|
|
1349 */
|
|
|
1350
|
|
|
1351 /* Save the value somewhere it will be GC'ed.
|
|
185
|
1352 (Can't overwrite tag slot because an unwind-protect may
|
|
0
|
1353 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1354 c->val = val;
|
|
|
1355
|
|
|
1356 #if 0 /* FSFmacs */
|
|
|
1357 /* Restore the polling-suppression count. */
|
|
|
1358 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1359 #endif
|
|
|
1360
|
|
|
1361 #if 0 /* FSFmacs */
|
|
|
1362 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1363 do
|
|
|
1364 {
|
|
|
1365 last_time = catchlist == c;
|
|
|
1366
|
|
|
1367 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1368 handlers. */
|
|
|
1369 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1370 handlerlist = catchlist->handlerlist;
|
|
|
1371 catchlist = catchlist->next;
|
|
404
|
1372 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1373 check_error_state_sanity ();
|
|
|
1374 #endif
|
|
0
|
1375 }
|
|
|
1376 while (! last_time);
|
|
|
1377 #else /* Actual XEmacs code */
|
|
|
1378 /* Unwind the specpdl stack */
|
|
|
1379 unbind_to (c->pdlcount, Qnil);
|
|
|
1380 catchlist = c->next;
|
|
404
|
1381 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1382 check_error_state_sanity ();
|
|
|
1383 #endif
|
|
0
|
1384 #endif
|
|
|
1385
|
|
|
1386 gcprolist = c->gcpro;
|
|
|
1387 backtrace_list = c->backlist;
|
|
|
1388 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1389
|
|
404
|
1390 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
0
|
1391 throw_level = 0;
|
|
380
|
1392 #endif
|
|
0
|
1393 LONGJMP (c->jmp, 1);
|
|
185
|
1394 }
|
|
0
|
1395
|
|
|
1396 static DOESNT_RETURN
|
|
|
1397 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1398 Lisp_Object sig, Lisp_Object data)
|
|
|
1399 {
|
|
404
|
1400 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
0
|
1401 /* die if we recurse more than is reasonable */
|
|
|
1402 if (++throw_level > 20)
|
|
|
1403 abort();
|
|
211
|
1404 #endif
|
|
0
|
1405
|
|
|
1406 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1407 "last resort" when there is no handler for this error and
|
|
|
1408 the debugger couldn't be invoked, so we are throwing to
|
|
|
1409 'top-level. If this tag doesn't exist (happens during the
|
|
|
1410 initialization stages) we would get in an infinite recursive
|
|
|
1411 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1412 really-early-error-handler.
|
|
|
1413
|
|
|
1414 Note that in fact the only time that the "last resort"
|
|
|
1415 occurs is when there's no catch for 'top-level -- the
|
|
|
1416 'top-level catch and the catch-all error handler are
|
|
|
1417 established at the same time, in initial_command_loop/
|
|
|
1418 top_level_1.
|
|
|
1419
|
|
185
|
1420 #### Fix this horrifitude!
|
|
0
|
1421 */
|
|
185
|
1422
|
|
0
|
1423 while (1)
|
|
|
1424 {
|
|
|
1425 REGISTER struct catchtag *c;
|
|
|
1426
|
|
|
1427 #if 0 /* FSFmacs */
|
|
|
1428 if (!NILP (tag)) /* #### */
|
|
|
1429 #endif
|
|
|
1430 for (c = catchlist; c; c = c->next)
|
|
|
1431 {
|
|
|
1432 if (EQ (c->tag, tag))
|
|
|
1433 unwind_to_catch (c, val);
|
|
|
1434 }
|
|
|
1435 if (!bomb_out_p)
|
|
|
1436 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1437 else
|
|
|
1438 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1439 }
|
|
|
1440
|
|
|
1441 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1442 /* throw_level--; */
|
|
|
1443 /* getting tired of compilation warnings */
|
|
|
1444 /* return Qnil; */
|
|
|
1445 }
|
|
|
1446
|
|
|
1447 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1448 Fthrow() works.
|
|
|
1449
|
|
|
1450 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1451 back to the appropriate condition-case handler after (maybe)
|
|
|
1452 the debugger is entered. In that case, TAG is the value
|
|
|
1453 of Vcondition_handlers that was in place just after the
|
|
|
1454 condition-case handler was set up. The car of this will be
|
|
|
1455 some data referring to the handler: Its car will be Qunbound
|
|
|
1456 (thus, this tag can never be generated by Lisp code), and
|
|
|
1457 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1458 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1459 This works fine because Fthrow() does not care what TAG was
|
|
|
1460 passed to it: it just looks up the catch list for something
|
|
|
1461 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1462 back to the place that established the catch (in this case,
|
|
|
1463 condition_case_1). See below for more info.
|
|
|
1464 */
|
|
|
1465
|
|
20
|
1466 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
272
|
1467 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
0
|
1468 Both TAG and VALUE are evalled.
|
|
20
|
1469 */
|
|
|
1470 (tag, val))
|
|
0
|
1471 {
|
|
|
1472 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1473 return Qnil;
|
|
|
1474 }
|
|
|
1475
|
|
20
|
1476 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1477 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1478 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1479 If BODYFORM completes normally, its value is returned
|
|
|
1480 after executing the UNWINDFORMS.
|
|
|
1481 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1482 */
|
|
|
1483 (args))
|
|
0
|
1484 {
|
|
|
1485 /* This function can GC */
|
|
380
|
1486 int speccount = specpdl_depth();
|
|
0
|
1487
|
|
272
|
1488 record_unwind_protect (Fprogn, XCDR (args));
|
|
380
|
1489 return unbind_to (speccount, Feval (XCAR (args)));
|
|
0
|
1490 }
|
|
|
1491
|
|
|
1492
|
|
380
|
1493 /************************************************************************/
|
|
|
1494 /* Signalling and trapping errors */
|
|
|
1495 /************************************************************************/
|
|
0
|
1496
|
|
|
1497 static Lisp_Object
|
|
|
1498 condition_bind_unwind (Lisp_Object loser)
|
|
|
1499 {
|
|
398
|
1500 Lisp_Cons *victim;
|
|
0
|
1501 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1502 Lisp_Object tem = XCAR (loser);
|
|
|
1503
|
|
|
1504 while (CONSP (tem))
|
|
|
1505 {
|
|
|
1506 victim = XCONS (tem);
|
|
|
1507 tem = victim->cdr;
|
|
|
1508 free_cons (victim);
|
|
|
1509 }
|
|
|
1510 victim = XCONS (loser);
|
|
|
1511
|
|
|
1512 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1513 Vcondition_handlers = victim->cdr;
|
|
|
1514
|
|
|
1515 free_cons (victim);
|
|
173
|
1516 return Qnil;
|
|
0
|
1517 }
|
|
|
1518
|
|
|
1519 static Lisp_Object
|
|
|
1520 condition_case_unwind (Lisp_Object loser)
|
|
|
1521 {
|
|
398
|
1522 Lisp_Cons *victim;
|
|
0
|
1523
|
|
|
1524 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1525 victim = XCONS (XCAR (loser));
|
|
|
1526 free_cons (victim);
|
|
|
1527
|
|
|
1528 victim = XCONS (loser);
|
|
|
1529 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1530 Vcondition_handlers = victim->cdr;
|
|
|
1531
|
|
|
1532 free_cons (victim);
|
|
173
|
1533 return Qnil;
|
|
0
|
1534 }
|
|
|
1535
|
|
|
1536 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1537 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1538
|
|
|
1539 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1540 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1541 HANDLERS as something to be caught, the return value of this
|
|
|
1542 function is the return value from BFUN. If such an error does
|
|
|
1543 occur, HFUN is called, and its return value becomes the
|
|
|
1544 return value of condition_case_1(). The second argument passed
|
|
|
1545 to HFUN will always be HARG. The first argument depends on
|
|
|
1546 HANDLERS:
|
|
|
1547
|
|
|
1548 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1549 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1550 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1551 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1552 `debug-on-error' was set.
|
|
|
1553
|
|
|
1554 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1555 debugger is invoked if `debug-on-error' was set.
|
|
|
1556
|
|
|
1557 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1558 exactly as in `condition-case', and errors will be trapped
|
|
|
1559 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1560 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1561 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1562
|
|
|
1563 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1564 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1565 for why), establishes a catch whose tag is this new value of
|
|
|
1566 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1567 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1568 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1569 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1570 jump point we just established, and we in turn just call the
|
|
|
1571 HFUN and return its value.
|
|
|
1572
|
|
|
1573 For a real condition-case, HFUN will always be
|
|
|
1574 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1575 to condition-case. That function just binds VAR to the cons
|
|
|
1576 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1577 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1578 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1579 it had *before* condition_case_1() was called. This maintains
|
|
|
1580 consistency (so that the state of things at exit of
|
|
|
1581 condition_case_1() is the same as at entry), and implies
|
|
|
1582 that the handler can signal the same error again (possibly
|
|
|
1583 after processing of its own), without getting in an infinite
|
|
|
1584 loop. */
|
|
|
1585
|
|
|
1586 Lisp_Object
|
|
|
1587 condition_case_1 (Lisp_Object handlers,
|
|
|
1588 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1589 Lisp_Object barg,
|
|
|
1590 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1591 Lisp_Object harg)
|
|
|
1592 {
|
|
380
|
1593 int speccount = specpdl_depth();
|
|
0
|
1594 struct catchtag c;
|
|
|
1595 struct gcpro gcpro1;
|
|
|
1596
|
|
|
1597 #if 0 /* FSFmacs */
|
|
|
1598 c.tag = Qnil;
|
|
|
1599 #else
|
|
|
1600 /* Do consing now so out-of-memory error happens up front */
|
|
|
1601 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1602 which is known specially by Fsignal.
|
|
|
1603 This is an abomination, but to fix it would require either
|
|
|
1604 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1605 or changing the byte-compiler output (no thanks). */
|
|
|
1606 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1607 Vcondition_handlers);
|
|
|
1608 #endif
|
|
|
1609 c.val = Qnil;
|
|
|
1610 c.backlist = backtrace_list;
|
|
|
1611 #if 0 /* FSFmacs */
|
|
|
1612 /* #### */
|
|
|
1613 c.handlerlist = handlerlist;
|
|
|
1614 #endif
|
|
|
1615 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1616 c.pdlcount = specpdl_depth();
|
|
0
|
1617 #if 0 /* FSFmacs */
|
|
|
1618 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1619 #endif
|
|
|
1620 c.gcpro = gcprolist;
|
|
|
1621 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1622 c.next = catchlist;
|
|
|
1623
|
|
|
1624 if (SETJMP (c.jmp))
|
|
|
1625 {
|
|
|
1626 /* throw does ungcpro, etc */
|
|
173
|
1627 return (*hfun) (c.val, harg);
|
|
0
|
1628 }
|
|
|
1629
|
|
|
1630 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1631
|
|
|
1632 catchlist = &c;
|
|
|
1633 #if 0 /* FSFmacs */
|
|
|
1634 h.handler = handlers;
|
|
|
1635 h.var = Qnil;
|
|
|
1636 h.next = handlerlist;
|
|
|
1637 h.tag = &c;
|
|
|
1638 handlerlist = &h;
|
|
|
1639 #else
|
|
|
1640 Vcondition_handlers = c.tag;
|
|
|
1641 #endif
|
|
|
1642 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1643
|
|
|
1644 c.val = ((*bfun) (barg));
|
|
|
1645
|
|
|
1646 /* The following is *not* true: (ben)
|
|
|
1647
|
|
|
1648 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1649 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1650 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1651 UNGCPRO;
|
|
|
1652 catchlist = c.next;
|
|
404
|
1653 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1654 check_error_state_sanity ();
|
|
|
1655 #endif
|
|
0
|
1656 Vcondition_handlers = XCDR (c.tag);
|
|
|
1657
|
|
173
|
1658 return unbind_to (speccount, c.val);
|
|
0
|
1659 }
|
|
|
1660
|
|
|
1661 static Lisp_Object
|
|
|
1662 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1663 {
|
|
|
1664 /* This function can GC */
|
|
|
1665 #if 0 /* FSFmacs */
|
|
|
1666 if (!NILP (h.var))
|
|
|
1667 specbind (h.var, c.val);
|
|
|
1668 val = Fprogn (Fcdr (h.chosen_clause));
|
|
185
|
1669
|
|
0
|
1670 /* Note that this just undoes the binding of h.var; whoever
|
|
380
|
1671 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
0
|
1672 throwing. */
|
|
|
1673 unbind_to (c.pdlcount, Qnil);
|
|
|
1674 return val;
|
|
|
1675 #else
|
|
|
1676 int speccount;
|
|
|
1677
|
|
380
|
1678 CHECK_TRUE_LIST (val);
|
|
0
|
1679 if (NILP (var))
|
|
380
|
1680 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1681
|
|
|
1682 speccount = specpdl_depth();
|
|
0
|
1683 specbind (var, Fcar (val));
|
|
|
1684 val = Fprogn (Fcdr (val));
|
|
|
1685 return unbind_to (speccount, val);
|
|
|
1686 #endif
|
|
|
1687 }
|
|
|
1688
|
|
|
1689 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1690 condition-case except that it takes three arguments rather
|
|
|
1691 than a single list of arguments. */
|
|
|
1692 Lisp_Object
|
|
272
|
1693 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
0
|
1694 {
|
|
|
1695 /* This function can GC */
|
|
380
|
1696 Lisp_Object handler;
|
|
|
1697
|
|
|
1698 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1699 {
|
|
|
1700 if (NILP (handler))
|
|
|
1701 ;
|
|
|
1702 else if (CONSP (handler))
|
|
|
1703 {
|
|
|
1704 Lisp_Object conditions = XCAR (handler);
|
|
|
1705 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1706 if (SYMBOLP (conditions))
|
|
|
1707 ;
|
|
|
1708 else
|
|
|
1709 {
|
|
|
1710 Lisp_Object condition;
|
|
|
1711 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1712 if (!SYMBOLP (condition))
|
|
|
1713 goto invalid_condition_handler;
|
|
|
1714 }
|
|
|
1715 }
|
|
|
1716 else
|
|
|
1717 {
|
|
|
1718 invalid_condition_handler:
|
|
|
1719 signal_simple_error ("Invalid condition handler", handler);
|
|
|
1720 }
|
|
|
1721 }
|
|
0
|
1722
|
|
|
1723 CHECK_SYMBOL (var);
|
|
|
1724
|
|
185
|
1725 return condition_case_1 (handlers,
|
|
380
|
1726 Feval, bodyform,
|
|
|
1727 run_condition_case_handlers,
|
|
|
1728 var);
|
|
0
|
1729 }
|
|
|
1730
|
|
20
|
1731 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1732 Regain control when an error is signalled.
|
|
|
1733 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
380
|
1734 Executes BODYFORM and returns its value if no error happens.
|
|
0
|
1735 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1736 where the BODY is made of Lisp expressions.
|
|
|
1737
|
|
|
1738 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1739 error's condition names. If an error happens, the first applicable
|
|
|
1740 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1741 all errors, even those without the `error' condition name on them
|
|
272
|
1742 \(e.g. `quit').
|
|
0
|
1743
|
|
|
1744 The car of a handler may be a list of condition names
|
|
|
1745 instead of a single condition name.
|
|
|
1746
|
|
|
1747 When a handler handles an error,
|
|
|
1748 control returns to the condition-case and the handler BODY... is executed
|
|
|
1749 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1750 VAR may be nil; then you do not get access to the signal information.
|
|
|
1751
|
|
|
1752 The value of the last BODY form is returned from the condition-case.
|
|
|
1753 See also the function `signal' for more info.
|
|
|
1754
|
|
|
1755 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1756 and the current catches, condition-cases, and bindings have all been
|
|
|
1757 popped back to the state they were in just before the call to
|
|
|
1758 `condition-case'. This means that resignalling the error from
|
|
|
1759 within the handler will not result in an infinite loop.
|
|
|
1760
|
|
|
1761 If you want to establish an error handler that is called with the
|
|
|
1762 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1763 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1764 */
|
|
70
|
1765 (args))
|
|
0
|
1766 {
|
|
|
1767 /* This function can GC */
|
|
380
|
1768 Lisp_Object var = XCAR (args);
|
|
|
1769 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1770 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1771 return condition_case_3 (bodyform, var, handlers);
|
|
185
|
1772 }
|
|
0
|
1773
|
|
20
|
1774 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1775 Regain control when an error is signalled, without popping the stack.
|
|
|
1776 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1777 This function is similar to `condition-case', but the handler is invoked
|
|
|
1778 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1779 that was current when `signal' was called, rather than when the handler
|
|
|
1780 was established.
|
|
|
1781
|
|
|
1782 HANDLER should be a function of one argument, which is a cons of the args
|
|
272
|
1783 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
0
|
1784 `signal' is called (this differs from `condition-case', which allows
|
|
|
1785 you to specify which errors are trapped). If the handler function
|
|
|
1786 returns, `signal' continues as if the handler were never invoked.
|
|
272
|
1787 \(It continues to look for handlers established earlier than this one,
|
|
0
|
1788 and invokes the standard error-handler if none is found.)
|
|
20
|
1789 */
|
|
272
|
1790 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1791 {
|
|
|
1792 /* This function can GC */
|
|
380
|
1793 int speccount = specpdl_depth();
|
|
0
|
1794 Lisp_Object tem;
|
|
|
1795
|
|
|
1796 /* #### If there were a way to check that args[0] were a function
|
|
|
1797 which accepted one arg, that should be done here ... */
|
|
|
1798
|
|
|
1799 /* (handler-fun . handler-args) */
|
|
380
|
1800 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
0
|
1801 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1802 Vcondition_handlers = tem;
|
|
|
1803
|
|
|
1804 /* Caller should have GC-protected args */
|
|
380
|
1805 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
0
|
1806 }
|
|
|
1807
|
|
|
1808 static int
|
|
|
1809 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1810 {
|
|
|
1811 if (EQ (type, Qt))
|
|
|
1812 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1813 * Use with caution! */
|
|
173
|
1814 return 1;
|
|
380
|
1815
|
|
|
1816 if (SYMBOLP (type))
|
|
|
1817 return !NILP (Fmemq (type, conditions));
|
|
|
1818
|
|
|
1819 for (; CONSP (type); type = XCDR (type))
|
|
|
1820 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1821 return 1;
|
|
|
1822
|
|
|
1823 return 0;
|
|
0
|
1824 }
|
|
|
1825
|
|
|
1826 static Lisp_Object
|
|
|
1827 return_from_signal (Lisp_Object value)
|
|
|
1828 {
|
|
251
|
1829 #if 1
|
|
0
|
1830 /* Most callers are not prepared to handle gc if this
|
|
|
1831 returns. So, since this feature is not very useful,
|
|
|
1832 take it out. */
|
|
|
1833 /* Have called debugger; return value to signaller */
|
|
173
|
1834 return value;
|
|
0
|
1835 #else /* But the reality is that that stinks, because: */
|
|
|
1836 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1837 to be continuable!! */
|
|
|
1838 error ("Returning a value from an error is no longer supported");
|
|
|
1839 #endif
|
|
|
1840 }
|
|
|
1841
|
|
|
1842 extern int in_display;
|
|
|
1843
|
|
|
1844
|
|
380
|
1845 /************************************************************************/
|
|
|
1846 /* the workhorse error-signaling function */
|
|
|
1847 /************************************************************************/
|
|
0
|
1848
|
|
|
1849 /* #### This function has not been synched with FSF. It diverges
|
|
|
1850 significantly. */
|
|
|
1851
|
|
|
1852 static Lisp_Object
|
|
|
1853 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1854 {
|
|
|
1855 /* This function can GC */
|
|
|
1856 struct gcpro gcpro1, gcpro2;
|
|
|
1857 Lisp_Object conditions;
|
|
|
1858 Lisp_Object handlers;
|
|
|
1859 /* signal_call_debugger() could get called more than once
|
|
|
1860 (once when a call-with-condition-handler is about to
|
|
|
1861 be dealt with, and another when a condition-case handler
|
|
|
1862 is about to be invoked). So make sure the debugger and/or
|
|
|
1863 stack trace aren't done more than once. */
|
|
|
1864 int stack_trace_displayed = 0;
|
|
|
1865 int debugger_entered = 0;
|
|
|
1866 GCPRO2 (conditions, handlers);
|
|
|
1867
|
|
|
1868 if (!initialized)
|
|
|
1869 {
|
|
|
1870 /* who knows how much has been initialized? Safest bet is
|
|
|
1871 just to bomb out immediately. */
|
|
404
|
1872 /* let's not use stderr_out() here, because that does a bunch of
|
|
|
1873 things that might not be safe yet. */
|
|
0
|
1874 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1875 abort ();
|
|
|
1876 }
|
|
|
1877
|
|
|
1878 if (gc_in_progress || in_display)
|
|
|
1879 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1880 There is no sensible way to handle errors there. */
|
|
|
1881 abort ();
|
|
|
1882
|
|
|
1883 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1884
|
|
|
1885 for (handlers = Vcondition_handlers;
|
|
|
1886 CONSP (handlers);
|
|
|
1887 handlers = XCDR (handlers))
|
|
|
1888 {
|
|
|
1889 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1890 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1891 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1892
|
|
|
1893 if (!UNBOUNDP (handler_fun))
|
|
|
1894 {
|
|
|
1895 /* call-with-condition-handler */
|
|
|
1896 Lisp_Object tem;
|
|
|
1897 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1898 struct gcpro ngcpro1;
|
|
|
1899 NGCPRO1 (all_handlers);
|
|
|
1900 Vcondition_handlers = outer_handlers;
|
|
|
1901
|
|
|
1902 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1903 outer_handlers, 1,
|
|
|
1904 &stack_trace_displayed,
|
|
|
1905 &debugger_entered);
|
|
|
1906 if (!UNBOUNDP (tem))
|
|
|
1907 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1908
|
|
|
1909 tem = Fcons (sig, data);
|
|
|
1910 if (NILP (handler_data))
|
|
|
1911 tem = call1 (handler_fun, tem);
|
|
|
1912 else
|
|
|
1913 {
|
|
|
1914 /* (This code won't be used (for now?).) */
|
|
|
1915 struct gcpro nngcpro1;
|
|
|
1916 Lisp_Object args[3];
|
|
|
1917 NNGCPRO1 (args[0]);
|
|
|
1918 nngcpro1.nvars = 3;
|
|
|
1919 args[0] = handler_fun;
|
|
|
1920 args[1] = tem;
|
|
|
1921 args[2] = handler_data;
|
|
|
1922 nngcpro1.var = args;
|
|
|
1923 tem = Fapply (3, args);
|
|
|
1924 NNUNGCPRO;
|
|
|
1925 }
|
|
|
1926 NUNGCPRO;
|
|
|
1927 #if 0
|
|
|
1928 if (!EQ (tem, Qsignal))
|
|
173
|
1929 return return_from_signal (tem);
|
|
0
|
1930 #endif
|
|
|
1931 /* If handler didn't throw, try another handler */
|
|
|
1932 Vcondition_handlers = all_handlers;
|
|
|
1933 }
|
|
|
1934
|
|
|
1935 /* It's a condition-case handler */
|
|
|
1936
|
|
185
|
1937 /* t is used by handlers for all conditions, set up by C code.
|
|
0
|
1938 * debugger is not called even if debug_on_error */
|
|
|
1939 else if (EQ (handler_data, Qt))
|
|
|
1940 {
|
|
|
1941 UNGCPRO;
|
|
173
|
1942 return Fthrow (handlers, Fcons (sig, data));
|
|
0
|
1943 }
|
|
|
1944 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1945 addition it invokes the debugger if debug_on_error.
|
|
|
1946 This is normally used for the outer command-loop error
|
|
|
1947 handler. */
|
|
|
1948 else if (EQ (handler_data, Qerror))
|
|
|
1949 {
|
|
|
1950 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1951 outer_handlers, 0,
|
|
|
1952 &stack_trace_displayed,
|
|
|
1953 &debugger_entered);
|
|
|
1954
|
|
|
1955 UNGCPRO;
|
|
|
1956 if (!UNBOUNDP (tem))
|
|
173
|
1957 return return_from_signal (tem);
|
|
0
|
1958
|
|
|
1959 tem = Fcons (sig, data);
|
|
173
|
1960 return Fthrow (handlers, tem);
|
|
0
|
1961 }
|
|
|
1962 else
|
|
|
1963 {
|
|
|
1964 /* handler established by real (Lisp) condition-case */
|
|
|
1965 Lisp_Object h;
|
|
|
1966
|
|
|
1967 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1968 {
|
|
|
1969 Lisp_Object clause = Fcar (h);
|
|
|
1970 Lisp_Object tem = Fcar (clause);
|
|
|
1971
|
|
|
1972 if (condition_type_p (tem, conditions))
|
|
|
1973 {
|
|
|
1974 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1975 outer_handlers, 1,
|
|
|
1976 &stack_trace_displayed,
|
|
|
1977 &debugger_entered);
|
|
|
1978 UNGCPRO;
|
|
|
1979 if (!UNBOUNDP (tem))
|
|
173
|
1980 return return_from_signal (tem);
|
|
0
|
1981
|
|
|
1982 /* Doesn't return */
|
|
|
1983 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
173
|
1984 return Fthrow (handlers, tem);
|
|
0
|
1985 }
|
|
|
1986 }
|
|
|
1987 }
|
|
|
1988 }
|
|
|
1989
|
|
|
1990 /* If no handler is present now, try to run the debugger,
|
|
|
1991 and if that fails, throw to top level.
|
|
|
1992
|
|
|
1993 #### The only time that no handler is present is during
|
|
|
1994 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1995 there is no 'top-level catch. (That's why the
|
|
|
1996 "bomb-out" hack was added.)
|
|
|
1997
|
|
185
|
1998 #### Fix this horrifitude!
|
|
0
|
1999 */
|
|
|
2000 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
2001 &stack_trace_displayed,
|
|
|
2002 &debugger_entered);
|
|
|
2003 UNGCPRO;
|
|
|
2004 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2005 return Qnil;
|
|
|
2006 }
|
|
|
2007
|
|
|
2008
|
|
|
2009 /****************** Error functions class 1 ******************/
|
|
|
2010
|
|
|
2011 /* Class 1: General functions that signal an error.
|
|
|
2012 These functions take an error type and a list of associated error
|
|
|
2013 data. */
|
|
|
2014
|
|
|
2015 /* The simplest external error function: it would be called
|
|
|
2016 signal_continuable_error() in the terminology below, but it's
|
|
|
2017 Lisp-callable. */
|
|
|
2018
|
|
20
|
2019 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2020 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2021 An error symbol is a symbol defined using `define-error'.
|
|
|
2022 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2023 If the signal is handled, DATA is made available to the handler.
|
|
|
2024 See also the function `signal-error', and the functions to handle errors:
|
|
|
2025 `condition-case' and `call-with-condition-handler'.
|
|
|
2026
|
|
|
2027 Note that this function can return, if the debugger is invoked and the
|
|
|
2028 user invokes the "return from signal" option.
|
|
20
|
2029 */
|
|
|
2030 (error_symbol, data))
|
|
0
|
2031 {
|
|
|
2032 /* Fsignal() is one of these functions that's called all the time
|
|
|
2033 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2034 protect the objects because all sorts of weird stuff could
|
|
|
2035 happen. */
|
|
|
2036
|
|
|
2037 struct gcpro gcpro1;
|
|
|
2038
|
|
|
2039 GCPRO1 (data);
|
|
|
2040 if (!NILP (Vcurrent_error_state))
|
|
|
2041 {
|
|
|
2042 if (!NILP (Vcurrent_warning_class))
|
|
|
2043 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2044 Fcons (error_symbol, data));
|
|
|
2045 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2046 abort (); /* Better not get here! */
|
|
|
2047 }
|
|
|
2048 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2049 }
|
|
|
2050
|
|
|
2051 /* Signal a non-continuable error. */
|
|
|
2052
|
|
|
2053 DOESNT_RETURN
|
|
|
2054 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2055 {
|
|
|
2056 for (;;)
|
|
|
2057 Fsignal (sig, data);
|
|
|
2058 }
|
|
404
|
2059 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
2060 void
|
|
|
2061 check_error_state_sanity (void)
|
|
0
|
2062 {
|
|
404
|
2063 struct catchtag *c;
|
|
|
2064 int found_error_tag = 0;
|
|
|
2065
|
|
|
2066 for (c = catchlist; c; c = c->next)
|
|
|
2067 {
|
|
|
2068 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2069 {
|
|
|
2070 found_error_tag = 1;
|
|
|
2071 break;
|
|
|
2072 }
|
|
|
2073 }
|
|
|
2074
|
|
|
2075 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
0
|
2076 }
|
|
404
|
2077 #endif
|
|
0
|
2078
|
|
|
2079 static Lisp_Object
|
|
|
2080 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2081 {
|
|
|
2082 Vcurrent_warning_class = warning_class;
|
|
|
2083 return Qnil;
|
|
|
2084 }
|
|
|
2085
|
|
|
2086 static Lisp_Object
|
|
|
2087 restore_current_error_state (Lisp_Object error_state)
|
|
|
2088 {
|
|
|
2089 Vcurrent_error_state = error_state;
|
|
|
2090 return Qnil;
|
|
|
2091 }
|
|
|
2092
|
|
404
|
2093 static Lisp_Object
|
|
|
2094 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2095 {
|
|
|
2096 Lisp_Object val;
|
|
|
2097 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
|
2098 Lisp_Object no_error = kludgy_args[2];
|
|
|
2099 int speccount = specpdl_depth ();
|
|
|
2100
|
|
|
2101 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2102 {
|
|
|
2103 record_unwind_protect (restore_current_error_state,
|
|
|
2104 Vcurrent_error_state);
|
|
|
2105 Vcurrent_error_state = no_error;
|
|
|
2106 }
|
|
|
2107 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2108 kludgy_args + 3, XINT (kludgy_args[1]));
|
|
|
2109 return unbind_to (speccount, val);
|
|
|
2110 }
|
|
|
2111
|
|
0
|
2112 /* Many functions would like to do one of three things if an error
|
|
|
2113 occurs:
|
|
|
2114
|
|
|
2115 (1) signal the error, as usual.
|
|
|
2116 (2) silently fail and return some error value.
|
|
|
2117 (3) do as (2) but issue a warning in the process.
|
|
|
2118
|
|
|
2119 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2120 value and calls maybe_signal_error() and other such functions.
|
|
|
2121 This approach is inherently error-prone and broken. A much
|
|
|
2122 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2123 Wrap this around any function in which you might want errors
|
|
|
2124 to not be errors.
|
|
|
2125 */
|
|
|
2126
|
|
|
2127 Lisp_Object
|
|
179
|
2128 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
0
|
2129 Lisp_Object class, Error_behavior errb,
|
|
|
2130 int nargs, ...)
|
|
|
2131 {
|
|
|
2132 va_list vargs;
|
|
|
2133 int speccount;
|
|
404
|
2134 Lisp_Object kludgy_args[23];
|
|
|
2135 Lisp_Object *args = kludgy_args + 3;
|
|
0
|
2136 int i;
|
|
|
2137 Lisp_Object no_error;
|
|
|
2138
|
|
|
2139 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2140 assert (!NILP (class));
|
|
|
2141 assert (nargs >= 0 && nargs < 20);
|
|
|
2142
|
|
|
2143 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2144 already trapped, we leave them trapped.)
|
|
|
2145
|
|
|
2146 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2147
|
|
|
2148 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2149 were previously enabled. However, we never change the
|
|
|
2150 warning class from one to another. */
|
|
|
2151 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2152 {
|
|
|
2153 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2154 class = Qnil;
|
|
|
2155 errb = ERROR_ME_NOT;
|
|
|
2156 no_error = Qt;
|
|
|
2157 }
|
|
|
2158 else
|
|
|
2159 no_error = Qnil;
|
|
185
|
2160
|
|
0
|
2161 va_start (vargs, nargs);
|
|
|
2162 for (i = 0; i < nargs; i++)
|
|
|
2163 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2164 va_end (vargs);
|
|
|
2165
|
|
|
2166 /* If error-checking is not disabled, just call the function.
|
|
|
2167 It's important not to override disabled error-checking with
|
|
|
2168 enabled error-checking. */
|
|
185
|
2169
|
|
0
|
2170 if (ERRB_EQ (errb, ERROR_ME))
|
|
380
|
2171 {
|
|
|
2172 Lisp_Object val;
|
|
|
2173 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2174 return val;
|
|
|
2175 }
|
|
|
2176
|
|
404
|
2177 speccount = specpdl_depth ();
|
|
0
|
2178 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2179 {
|
|
|
2180 /* If we're currently calling for no warnings, then make it so.
|
|
|
2181 If we're currently calling for warnings and we weren't
|
|
|
2182 previously, then set our warning class; otherwise, leave
|
|
|
2183 the existing one alone. */
|
|
|
2184 record_unwind_protect (restore_current_warning_class,
|
|
|
2185 Vcurrent_warning_class);
|
|
|
2186 Vcurrent_warning_class = class;
|
|
|
2187 }
|
|
|
2188
|
|
|
2189 {
|
|
|
2190 int threw;
|
|
|
2191 Lisp_Object the_retval;
|
|
|
2192 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2193 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2194 struct gcpro gcpro1, gcpro2;
|
|
|
2195
|
|
|
2196 GCPRO2 (opaque1, opaque2);
|
|
|
2197 kludgy_args[0] = opaque2;
|
|
|
2198 kludgy_args[1] = make_int (nargs);
|
|
404
|
2199 kludgy_args[2] = no_error;
|
|
0
|
2200 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2201 call_with_suspended_errors_1,
|
|
|
2202 opaque1, &threw);
|
|
|
2203 free_opaque_ptr (opaque1);
|
|
|
2204 free_opaque_ptr (opaque2);
|
|
|
2205 UNGCPRO;
|
|
|
2206 /* Use the returned value except in non-local exit, when
|
|
|
2207 RETVAL applies. */
|
|
272
|
2208 /* Some perverse compilers require the perverse cast below. */
|
|
|
2209 return unbind_to (speccount,
|
|
|
2210 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
0
|
2211 }
|
|
|
2212 }
|
|
|
2213
|
|
|
2214 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2215 according to ERRB. CLASS is the class of warning and should
|
|
|
2216 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2217 Qresource, etc.). */
|
|
|
2218
|
|
|
2219 void
|
|
|
2220 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2221 Error_behavior errb)
|
|
|
2222 {
|
|
|
2223 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2224 return;
|
|
|
2225 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2226 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2227 else
|
|
|
2228 for (;;)
|
|
|
2229 Fsignal (sig, data);
|
|
|
2230 }
|
|
|
2231
|
|
|
2232 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2233 according to ERRB. */
|
|
|
2234
|
|
|
2235 Lisp_Object
|
|
|
2236 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2237 Lisp_Object class, Error_behavior errb)
|
|
|
2238 {
|
|
|
2239 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2240 return Qnil;
|
|
|
2241 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2242 {
|
|
|
2243 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2244 return Qnil;
|
|
|
2245 }
|
|
|
2246 else
|
|
|
2247 return Fsignal (sig, data);
|
|
|
2248 }
|
|
|
2249
|
|
|
2250
|
|
|
2251 /****************** Error functions class 2 ******************/
|
|
|
2252
|
|
|
2253 /* Class 2: Printf-like functions that signal an error.
|
|
|
2254 These functions signal an error of type Qerror, whose data
|
|
|
2255 is a single string, created using the arguments. */
|
|
|
2256
|
|
|
2257 /* dump an error message; called like printf */
|
|
|
2258
|
|
|
2259 DOESNT_RETURN
|
|
398
|
2260 error (const char *fmt, ...)
|
|
0
|
2261 {
|
|
|
2262 Lisp_Object obj;
|
|
|
2263 va_list args;
|
|
|
2264
|
|
|
2265 va_start (args, fmt);
|
|
398
|
2266 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2267 args);
|
|
|
2268 va_end (args);
|
|
|
2269
|
|
|
2270 /* Fsignal GC-protects its args */
|
|
|
2271 signal_error (Qerror, list1 (obj));
|
|
|
2272 }
|
|
|
2273
|
|
|
2274 void
|
|
398
|
2275 maybe_error (Lisp_Object class, Error_behavior errb, const char *fmt, ...)
|
|
0
|
2276 {
|
|
|
2277 Lisp_Object obj;
|
|
|
2278 va_list args;
|
|
|
2279
|
|
|
2280 /* Optimization: */
|
|
|
2281 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2282 return;
|
|
|
2283
|
|
|
2284 va_start (args, fmt);
|
|
398
|
2285 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2286 args);
|
|
|
2287 va_end (args);
|
|
|
2288
|
|
|
2289 /* Fsignal GC-protects its args */
|
|
|
2290 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2291 }
|
|
|
2292
|
|
|
2293 Lisp_Object
|
|
398
|
2294 continuable_error (const char *fmt, ...)
|
|
0
|
2295 {
|
|
|
2296 Lisp_Object obj;
|
|
|
2297 va_list args;
|
|
|
2298
|
|
|
2299 va_start (args, fmt);
|
|
398
|
2300 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2301 args);
|
|
|
2302 va_end (args);
|
|
|
2303
|
|
|
2304 /* Fsignal GC-protects its args */
|
|
|
2305 return Fsignal (Qerror, list1 (obj));
|
|
|
2306 }
|
|
|
2307
|
|
|
2308 Lisp_Object
|
|
|
2309 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
398
|
2310 const char *fmt, ...)
|
|
0
|
2311 {
|
|
|
2312 Lisp_Object obj;
|
|
|
2313 va_list args;
|
|
|
2314
|
|
|
2315 /* Optimization: */
|
|
|
2316 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2317 return Qnil;
|
|
|
2318
|
|
|
2319 va_start (args, fmt);
|
|
398
|
2320 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2321 args);
|
|
|
2322 va_end (args);
|
|
|
2323
|
|
|
2324 /* Fsignal GC-protects its args */
|
|
|
2325 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2326 }
|
|
|
2327
|
|
|
2328
|
|
|
2329 /****************** Error functions class 3 ******************/
|
|
|
2330
|
|
|
2331 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2332 These functions signal an error of type Qerror, whose data
|
|
|
2333 is two objects, a string and a related Lisp object (usually the object
|
|
|
2334 where the error is occurring). */
|
|
|
2335
|
|
|
2336 DOESNT_RETURN
|
|
398
|
2337 signal_simple_error (const char *reason, Lisp_Object frob)
|
|
0
|
2338 {
|
|
|
2339 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2340 }
|
|
|
2341
|
|
|
2342 void
|
|
398
|
2343 maybe_signal_simple_error (const char *reason, Lisp_Object frob,
|
|
0
|
2344 Lisp_Object class, Error_behavior errb)
|
|
|
2345 {
|
|
|
2346 /* Optimization: */
|
|
|
2347 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2348 return;
|
|
|
2349 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2350 class, errb);
|
|
|
2351 }
|
|
|
2352
|
|
|
2353 Lisp_Object
|
|
398
|
2354 signal_simple_continuable_error (const char *reason, Lisp_Object frob)
|
|
0
|
2355 {
|
|
|
2356 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2357 }
|
|
|
2358
|
|
|
2359 Lisp_Object
|
|
398
|
2360 maybe_signal_simple_continuable_error (const char *reason, Lisp_Object frob,
|
|
0
|
2361 Lisp_Object class, Error_behavior errb)
|
|
|
2362 {
|
|
|
2363 /* Optimization: */
|
|
|
2364 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2365 return Qnil;
|
|
|
2366 return maybe_signal_continuable_error
|
|
|
2367 (Qerror, list2 (build_translated_string (reason),
|
|
|
2368 frob), class, errb);
|
|
185
|
2369 }
|
|
0
|
2370
|
|
|
2371
|
|
|
2372 /****************** Error functions class 4 ******************/
|
|
|
2373
|
|
|
2374 /* Class 4: Printf-like functions that signal an error.
|
|
|
2375 These functions signal an error of type Qerror, whose data
|
|
|
2376 is a two objects, a string (created using the arguments) and a
|
|
|
2377 Lisp object.
|
|
|
2378 */
|
|
|
2379
|
|
|
2380 DOESNT_RETURN
|
|
398
|
2381 error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
0
|
2382 {
|
|
|
2383 Lisp_Object obj;
|
|
|
2384 va_list args;
|
|
|
2385
|
|
|
2386 va_start (args, fmt);
|
|
398
|
2387 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2388 args);
|
|
|
2389 va_end (args);
|
|
|
2390
|
|
|
2391 /* Fsignal GC-protects its args */
|
|
|
2392 signal_error (Qerror, list2 (obj, frob));
|
|
|
2393 }
|
|
|
2394
|
|
|
2395 void
|
|
|
2396 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
398
|
2397 Error_behavior errb, const char *fmt, ...)
|
|
0
|
2398 {
|
|
|
2399 Lisp_Object obj;
|
|
|
2400 va_list args;
|
|
|
2401
|
|
|
2402 /* Optimization: */
|
|
|
2403 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2404 return;
|
|
|
2405
|
|
|
2406 va_start (args, fmt);
|
|
398
|
2407 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2408 args);
|
|
|
2409 va_end (args);
|
|
|
2410
|
|
|
2411 /* Fsignal GC-protects its args */
|
|
|
2412 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2413 }
|
|
|
2414
|
|
|
2415 Lisp_Object
|
|
398
|
2416 continuable_error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
0
|
2417 {
|
|
|
2418 Lisp_Object obj;
|
|
|
2419 va_list args;
|
|
|
2420
|
|
|
2421 va_start (args, fmt);
|
|
398
|
2422 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2423 args);
|
|
|
2424 va_end (args);
|
|
|
2425
|
|
|
2426 /* Fsignal GC-protects its args */
|
|
|
2427 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2428 }
|
|
|
2429
|
|
|
2430 Lisp_Object
|
|
|
2431 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
398
|
2432 Error_behavior errb, const char *fmt, ...)
|
|
0
|
2433 {
|
|
|
2434 Lisp_Object obj;
|
|
|
2435 va_list args;
|
|
|
2436
|
|
|
2437 /* Optimization: */
|
|
|
2438 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2439 return Qnil;
|
|
|
2440
|
|
|
2441 va_start (args, fmt);
|
|
398
|
2442 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2443 args);
|
|
|
2444 va_end (args);
|
|
|
2445
|
|
|
2446 /* Fsignal GC-protects its args */
|
|
|
2447 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2448 class, errb);
|
|
|
2449 }
|
|
|
2450
|
|
|
2451
|
|
|
2452 /****************** Error functions class 5 ******************/
|
|
|
2453
|
|
|
2454 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2455 These functions signal an error of type Qerror, whose data
|
|
|
2456 is three objects, a string and two related Lisp objects. */
|
|
|
2457
|
|
|
2458 DOESNT_RETURN
|
|
398
|
2459 signal_simple_error_2 (const char *reason,
|
|
0
|
2460 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2461 {
|
|
|
2462 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2463 frob1));
|
|
|
2464 }
|
|
|
2465
|
|
|
2466 void
|
|
398
|
2467 maybe_signal_simple_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2468 Lisp_Object frob1, Lisp_Object class,
|
|
|
2469 Error_behavior errb)
|
|
|
2470 {
|
|
|
2471 /* Optimization: */
|
|
|
2472 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2473 return;
|
|
|
2474 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2475 frob1), class, errb);
|
|
|
2476 }
|
|
|
2477
|
|
|
2478
|
|
|
2479 Lisp_Object
|
|
398
|
2480 signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2481 Lisp_Object frob1)
|
|
|
2482 {
|
|
|
2483 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2484 frob1));
|
|
|
2485 }
|
|
|
2486
|
|
|
2487 Lisp_Object
|
|
398
|
2488 maybe_signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2489 Lisp_Object frob1, Lisp_Object class,
|
|
|
2490 Error_behavior errb)
|
|
|
2491 {
|
|
|
2492 /* Optimization: */
|
|
|
2493 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2494 return Qnil;
|
|
|
2495 return maybe_signal_continuable_error
|
|
|
2496 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2497 frob1),
|
|
|
2498 class, errb);
|
|
|
2499 }
|
|
|
2500
|
|
|
2501
|
|
|
2502 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2503 void
|
|
|
2504 signal_quit (void)
|
|
|
2505 {
|
|
|
2506 /* This function can GC */
|
|
|
2507 if (EQ (Vquit_flag, Qcritical))
|
|
|
2508 debug_on_quit |= 2; /* set critical bit. */
|
|
185
|
2509 Vquit_flag = Qnil;
|
|
0
|
2510 /* note that this is continuable. */
|
|
|
2511 Fsignal (Qquit, Qnil);
|
|
|
2512 }
|
|
|
2513
|
|
|
2514
|
|
380
|
2515 /* Used in core lisp functions for efficiency */
|
|
398
|
2516 Lisp_Object
|
|
380
|
2517 signal_void_function_error (Lisp_Object function)
|
|
|
2518 {
|
|
398
|
2519 return Fsignal (Qvoid_function, list1 (function));
|
|
380
|
2520 }
|
|
|
2521
|
|
398
|
2522 Lisp_Object
|
|
380
|
2523 signal_invalid_function_error (Lisp_Object function)
|
|
|
2524 {
|
|
398
|
2525 return Fsignal (Qinvalid_function, list1 (function));
|
|
380
|
2526 }
|
|
|
2527
|
|
398
|
2528 Lisp_Object
|
|
380
|
2529 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2530 {
|
|
398
|
2531 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2532 list2 (function, make_int (nargs)));
|
|
380
|
2533 }
|
|
|
2534
|
|
|
2535 /* Used in list traversal macros for efficiency. */
|
|
398
|
2536 DOESNT_RETURN
|
|
380
|
2537 signal_malformed_list_error (Lisp_Object list)
|
|
|
2538 {
|
|
398
|
2539 signal_error (Qmalformed_list, list1 (list));
|
|
380
|
2540 }
|
|
|
2541
|
|
398
|
2542 DOESNT_RETURN
|
|
380
|
2543 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2544 {
|
|
398
|
2545 signal_error (Qmalformed_property_list, list1 (list));
|
|
380
|
2546 }
|
|
|
2547
|
|
398
|
2548 DOESNT_RETURN
|
|
380
|
2549 signal_circular_list_error (Lisp_Object list)
|
|
|
2550 {
|
|
398
|
2551 signal_error (Qcircular_list, list1 (list));
|
|
380
|
2552 }
|
|
|
2553
|
|
398
|
2554 DOESNT_RETURN
|
|
380
|
2555 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2556 {
|
|
398
|
2557 signal_error (Qcircular_property_list, list1 (list));
|
|
380
|
2558 }
|
|
|
2559
|
|
|
2560 /************************************************************************/
|
|
|
2561 /* User commands */
|
|
|
2562 /************************************************************************/
|
|
0
|
2563
|
|
20
|
2564 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
272
|
2565 Return t if FUNCTION makes provisions for interactive calling.
|
|
0
|
2566 This means it contains a description for how to read arguments to give it.
|
|
|
2567 The value is nil for an invalid function or a symbol with no function
|
|
|
2568 definition.
|
|
|
2569
|
|
|
2570 Interactively callable functions include
|
|
|
2571
|
|
|
2572 -- strings and vectors (treated as keyboard macros)
|
|
|
2573 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2574 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2575 (i.e. the interactive flag)
|
|
|
2576 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2577 value
|
|
|
2578 -- subrs (built-in functions) that are interactively callable
|
|
|
2579
|
|
|
2580 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2581 */
|
|
|
2582 (function))
|
|
0
|
2583 {
|
|
272
|
2584 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2585
|
|
380
|
2586 if (COMPILED_FUNCTIONP (fun))
|
|
|
2587 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2588
|
|
|
2589 /* Lists may represent commands. */
|
|
|
2590 if (CONSP (fun))
|
|
|
2591 {
|
|
|
2592 Lisp_Object funcar = XCAR (fun);
|
|
|
2593 if (EQ (funcar, Qlambda))
|
|
|
2594 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2595 if (EQ (funcar, Qautoload))
|
|
|
2596 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2597 else
|
|
|
2598 return Qnil;
|
|
|
2599 }
|
|
0
|
2600
|
|
|
2601 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2602 interactive spec. */
|
|
|
2603 if (SUBRP (fun))
|
|
149
|
2604 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2605
|
|
0
|
2606 /* Strings and vectors are keyboard macros. */
|
|
|
2607 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2608 return Qt;
|
|
|
2609
|
|
380
|
2610 /* Everything else (including Qunbound) is not a command. */
|
|
|
2611 return Qnil;
|
|
0
|
2612 }
|
|
|
2613
|
|
20
|
2614 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2615 Execute CMD as an editor command.
|
|
|
2616 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2617 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2618 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2619 when reading the arguments.
|
|
20
|
2620 */
|
|
|
2621 (cmd, record, keys))
|
|
0
|
2622 {
|
|
|
2623 /* This function can GC */
|
|
|
2624 Lisp_Object prefixarg;
|
|
|
2625 Lisp_Object final = cmd;
|
|
|
2626 struct backtrace backtrace;
|
|
|
2627 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2628
|
|
|
2629 prefixarg = con->prefix_arg;
|
|
|
2630 con->prefix_arg = Qnil;
|
|
|
2631 Vcurrent_prefix_arg = prefixarg;
|
|
|
2632 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2633
|
|
|
2634 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
310
|
2635 return run_hook (Vdisabled_command_hook);
|
|
0
|
2636
|
|
|
2637 for (;;)
|
|
|
2638 {
|
|
|
2639 final = indirect_function (cmd, 1);
|
|
|
2640 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2641 do_autoload (final, cmd);
|
|
|
2642 else
|
|
|
2643 break;
|
|
|
2644 }
|
|
|
2645
|
|
|
2646 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2647 {
|
|
|
2648 backtrace.function = &Qcall_interactively;
|
|
|
2649 backtrace.args = &cmd;
|
|
|
2650 backtrace.nargs = 1;
|
|
|
2651 backtrace.evalargs = 0;
|
|
380
|
2652 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2653 backtrace.debug_on_exit = 0;
|
|
116
|
2654 PUSH_BACKTRACE (backtrace);
|
|
0
|
2655
|
|
|
2656 final = Fcall_interactively (cmd, record, keys);
|
|
|
2657
|
|
116
|
2658 POP_BACKTRACE (backtrace);
|
|
173
|
2659 return final;
|
|
0
|
2660 }
|
|
|
2661 else if (STRINGP (final) || VECTORP (final))
|
|
|
2662 {
|
|
|
2663 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2664 }
|
|
|
2665 else
|
|
|
2666 {
|
|
|
2667 Fsignal (Qwrong_type_argument,
|
|
|
2668 Fcons (Qcommandp,
|
|
398
|
2669 (EQ (cmd, final)
|
|
0
|
2670 ? list1 (cmd)
|
|
|
2671 : list2 (cmd, final))));
|
|
|
2672 return Qnil;
|
|
|
2673 }
|
|
|
2674 }
|
|
|
2675
|
|
20
|
2676 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2677 Return t if function in which this appears was called interactively.
|
|
|
2678 This means that the function was called with call-interactively (which
|
|
|
2679 includes being called as the binding of a key)
|
|
|
2680 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2681 */
|
|
|
2682 ())
|
|
0
|
2683 {
|
|
|
2684 REGISTER struct backtrace *btp;
|
|
|
2685 REGISTER Lisp_Object fun;
|
|
|
2686
|
|
|
2687 if (!INTERACTIVE)
|
|
|
2688 return Qnil;
|
|
|
2689
|
|
|
2690 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2691 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2692 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2693 compiled function. */
|
|
|
2694 btp = backtrace_list;
|
|
|
2695
|
|
|
2696 #if 0 /* FSFmacs */
|
|
|
2697
|
|
|
2698 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2699 out which one is more correct. */
|
|
|
2700 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2701 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2702 fun = Findirect_function (*btp->function);
|
|
|
2703 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2704 btp = btp->next;
|
|
|
2705
|
|
|
2706 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2707 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2708 definition, this function isn't really being called
|
|
|
2709 interactively, but because that's the way Emacs 18 always builds
|
|
|
2710 byte-compiled functions, we'll accept it for now. */
|
|
|
2711 if (EQ (*btp->function, Qbyte_code))
|
|
|
2712 btp = btp->next;
|
|
|
2713
|
|
|
2714 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2715 looking at several frames for special forms. Skip past them. */
|
|
185
|
2716 while (btp &&
|
|
0
|
2717 btp->nargs == UNEVALLED)
|
|
|
2718 btp = btp->next;
|
|
|
2719
|
|
|
2720 #else
|
|
|
2721
|
|
|
2722 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2723 btp = btp->next;
|
|
|
2724 for (;
|
|
|
2725 btp && (btp->nargs == UNEVALLED
|
|
|
2726 || EQ (*btp->function, Qbyte_code));
|
|
|
2727 btp = btp->next)
|
|
|
2728 {}
|
|
|
2729 /* btp now points at the frame of the innermost function
|
|
|
2730 that DOES eval its args.
|
|
|
2731 If it is a built-in function (such as load or eval-region)
|
|
|
2732 return nil. */
|
|
|
2733 /* Beats me why this is necessary, but it is */
|
|
|
2734 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2735 return Qt;
|
|
|
2736
|
|
|
2737 #endif
|
|
|
2738
|
|
|
2739 fun = Findirect_function (*btp->function);
|
|
|
2740 if (SUBRP (fun))
|
|
|
2741 return Qnil;
|
|
|
2742 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2743 Return t if that function was called interactively. */
|
|
|
2744 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2745 return Qt;
|
|
|
2746 return Qnil;
|
|
|
2747 }
|
|
|
2748
|
|
|
2749
|
|
380
|
2750 /************************************************************************/
|
|
|
2751 /* Autoloading */
|
|
|
2752 /************************************************************************/
|
|
0
|
2753
|
|
20
|
2754 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2755 Define FUNCTION to autoload from FILE.
|
|
|
2756 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2757 Third arg DOCSTRING is documentation for the function.
|
|
|
2758 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2759 Fifth arg TYPE indicates the type of the object:
|
|
|
2760 nil or omitted says FUNCTION is a function,
|
|
|
2761 `keymap' says FUNCTION is really a keymap, and
|
|
|
2762 `macro' or t says FUNCTION is really a macro.
|
|
|
2763 Third through fifth args give info about the real definition.
|
|
|
2764 They default to nil.
|
|
|
2765 If FUNCTION is already defined other than as an autoload,
|
|
|
2766 this does nothing and returns nil.
|
|
20
|
2767 */
|
|
|
2768 (function, file, docstring, interactive, type))
|
|
0
|
2769 {
|
|
|
2770 /* This function can GC */
|
|
|
2771 CHECK_SYMBOL (function);
|
|
|
2772 CHECK_STRING (file);
|
|
|
2773
|
|
|
2774 /* If function is defined and not as an autoload, don't override */
|
|
380
|
2775 {
|
|
|
2776 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
2777 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
2778 return Qnil;
|
|
|
2779 }
|
|
0
|
2780
|
|
|
2781 if (purify_flag)
|
|
|
2782 {
|
|
|
2783 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2784 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2785 }
|
|
|
2786
|
|
398
|
2787 return Ffset (function, Fcons (Qautoload, list4 (file,
|
|
|
2788 docstring,
|
|
|
2789 interactive,
|
|
|
2790 type)));
|
|
0
|
2791 }
|
|
|
2792
|
|
|
2793 Lisp_Object
|
|
|
2794 un_autoload (Lisp_Object oldqueue)
|
|
|
2795 {
|
|
|
2796 /* This function can GC */
|
|
|
2797 REGISTER Lisp_Object queue, first, second;
|
|
|
2798
|
|
|
2799 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2800 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2801 queue = Vautoload_queue;
|
|
|
2802 Vautoload_queue = oldqueue;
|
|
|
2803 while (CONSP (queue))
|
|
|
2804 {
|
|
380
|
2805 first = XCAR (queue);
|
|
0
|
2806 second = Fcdr (first);
|
|
|
2807 first = Fcar (first);
|
|
|
2808 if (NILP (second))
|
|
|
2809 Vfeatures = first;
|
|
|
2810 else
|
|
|
2811 Ffset (first, second);
|
|
|
2812 queue = Fcdr (queue);
|
|
|
2813 }
|
|
|
2814 return Qnil;
|
|
|
2815 }
|
|
|
2816
|
|
|
2817 void
|
|
185
|
2818 do_autoload (Lisp_Object fundef,
|
|
0
|
2819 Lisp_Object funname)
|
|
|
2820 {
|
|
|
2821 /* This function can GC */
|
|
380
|
2822 int speccount = specpdl_depth();
|
|
0
|
2823 Lisp_Object fun = funname;
|
|
|
2824 struct gcpro gcpro1, gcpro2;
|
|
|
2825
|
|
|
2826 CHECK_SYMBOL (funname);
|
|
|
2827 GCPRO2 (fun, funname);
|
|
|
2828
|
|
|
2829 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2830 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2831 Vautoload_queue = Qt;
|
|
380
|
2832 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
0
|
2833
|
|
|
2834 {
|
|
380
|
2835 Lisp_Object queue;
|
|
0
|
2836
|
|
|
2837 /* Save the old autoloads, in case we ever do an unload. */
|
|
380
|
2838 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
2839 {
|
|
|
2840 Lisp_Object first = XCAR (queue);
|
|
|
2841 Lisp_Object second = Fcdr (first);
|
|
|
2842
|
|
|
2843 first = Fcar (first);
|
|
|
2844
|
|
|
2845 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2846 may be an atom if the autoload entry was generated by a defalias
|
|
|
2847 or fset. */
|
|
|
2848 if (CONSP (second))
|
|
|
2849 Fput (first, Qautoload, (XCDR (second)));
|
|
|
2850 }
|
|
0
|
2851 }
|
|
|
2852
|
|
|
2853 /* Once loading finishes, don't undo it. */
|
|
|
2854 Vautoload_queue = Qt;
|
|
|
2855 unbind_to (speccount, Qnil);
|
|
|
2856
|
|
|
2857 fun = indirect_function (fun, 0);
|
|
|
2858
|
|
|
2859 #if 0 /* FSFmacs */
|
|
|
2860 if (!NILP (Fequal (fun, fundef)))
|
|
|
2861 #else
|
|
|
2862 if (UNBOUNDP (fun)
|
|
|
2863 || (CONSP (fun)
|
|
|
2864 && EQ (XCAR (fun), Qautoload)))
|
|
|
2865 #endif
|
|
|
2866 error ("Autoloading failed to define function %s",
|
|
|
2867 string_data (XSYMBOL (funname)->name));
|
|
|
2868 UNGCPRO;
|
|
|
2869 }
|
|
|
2870
|
|
|
2871
|
|
380
|
2872 /************************************************************************/
|
|
|
2873 /* eval, funcall, apply */
|
|
|
2874 /************************************************************************/
|
|
0
|
2875
|
|
185
|
2876 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
398
|
2877 int nargs, Lisp_Object args[]);
|
|
0
|
2878 static int in_warnings;
|
|
|
2879
|
|
|
2880 static Lisp_Object
|
|
|
2881 in_warnings_restore (Lisp_Object minimus)
|
|
|
2882 {
|
|
|
2883 in_warnings = 0;
|
|
|
2884 return Qnil;
|
|
|
2885 }
|
|
|
2886
|
|
20
|
2887 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2888 Evaluate FORM and return its value.
|
|
20
|
2889 */
|
|
|
2890 (form))
|
|
0
|
2891 {
|
|
|
2892 /* This function can GC */
|
|
|
2893 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2894 int nargs;
|
|
|
2895 struct backtrace backtrace;
|
|
|
2896
|
|
|
2897 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2898 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2899 {
|
|
|
2900 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
380
|
2901 int speccount = specpdl_depth();
|
|
0
|
2902 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2903
|
|
|
2904 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2905 in_warnings = 1;
|
|
|
2906 this_warning_cons = Vpending_warnings;
|
|
|
2907 this_warning = XCAR (this_warning_cons);
|
|
|
2908 /* in case an error occurs in the warn function, at least
|
|
|
2909 it won't happen infinitely */
|
|
|
2910 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2911 free_cons (XCONS (this_warning_cons));
|
|
|
2912 class = XCAR (this_warning);
|
|
|
2913 level = XCAR (XCDR (this_warning));
|
|
|
2914 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2915 free_list (this_warning);
|
|
185
|
2916
|
|
0
|
2917 if (NILP (Vpending_warnings))
|
|
|
2918 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2919 but safer */
|
|
|
2920
|
|
|
2921 GCPRO4 (form, class, level, messij);
|
|
|
2922 if (!STRINGP (messij))
|
|
|
2923 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2924 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2925 UNGCPRO;
|
|
|
2926 unbind_to (speccount, Qnil);
|
|
|
2927 }
|
|
|
2928
|
|
|
2929 if (!CONSP (form))
|
|
380
|
2930 {
|
|
|
2931 if (SYMBOLP (form))
|
|
|
2932 return Fsymbol_value (form);
|
|
|
2933 else
|
|
|
2934 return form;
|
|
|
2935 }
|
|
0
|
2936
|
|
|
2937 QUIT;
|
|
|
2938 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2939 {
|
|
|
2940 struct gcpro gcpro1;
|
|
|
2941 GCPRO1 (form);
|
|
|
2942 garbage_collect_1 ();
|
|
|
2943 UNGCPRO;
|
|
|
2944 }
|
|
|
2945
|
|
|
2946 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2947 {
|
|
|
2948 if (max_lisp_eval_depth < 100)
|
|
|
2949 max_lisp_eval_depth = 100;
|
|
|
2950 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2951 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2952 }
|
|
|
2953
|
|
380
|
2954 /* We guaranteed CONSP (form) above */
|
|
|
2955 original_fun = XCAR (form);
|
|
195
|
2956 original_args = XCDR (form);
|
|
|
2957
|
|
380
|
2958 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
2959
|
|
|
2960 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2961 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2962 backtrace.args = &original_args;
|
|
|
2963 backtrace.nargs = UNEVALLED;
|
|
|
2964 backtrace.evalargs = 1;
|
|
|
2965 backtrace.debug_on_exit = 0;
|
|
116
|
2966 PUSH_BACKTRACE (backtrace);
|
|
0
|
2967
|
|
|
2968 if (debug_on_next_call)
|
|
|
2969 do_debug_on_call (Qt);
|
|
|
2970
|
|
245
|
2971 if (profiling_active)
|
|
|
2972 profile_increase_call_count (original_fun);
|
|
|
2973
|
|
0
|
2974 /* At this point, only original_fun and original_args
|
|
380
|
2975 have values that will be used below. */
|
|
0
|
2976 retry:
|
|
|
2977 fun = indirect_function (original_fun, 1);
|
|
|
2978
|
|
|
2979 if (SUBRP (fun))
|
|
|
2980 {
|
|
380
|
2981 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
2982 int max_args = subr->max_args;
|
|
380
|
2983
|
|
|
2984 if (nargs < subr->min_args)
|
|
|
2985 goto wrong_number_of_arguments;
|
|
|
2986
|
|
|
2987 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
0
|
2988 {
|
|
|
2989 backtrace.evalargs = 0;
|
|
398
|
2990 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
380
|
2991 (original_args));
|
|
0
|
2992 }
|
|
380
|
2993 else if (nargs <= max_args)
|
|
|
2994 {
|
|
|
2995 struct gcpro gcpro1;
|
|
|
2996 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
2997 REGISTER Lisp_Object *p = args;
|
|
|
2998
|
|
|
2999 GCPRO1 (args[0]);
|
|
|
3000 gcpro1.nvars = 0;
|
|
|
3001
|
|
|
3002 {
|
|
|
3003 REGISTER Lisp_Object arg;
|
|
|
3004 LIST_LOOP_2 (arg, original_args)
|
|
|
3005 {
|
|
|
3006 *p++ = Feval (arg);
|
|
|
3007 gcpro1.nvars++;
|
|
|
3008 }
|
|
|
3009 }
|
|
|
3010
|
|
|
3011 /* &optional args default to nil. */
|
|
|
3012 while (p - args < max_args)
|
|
|
3013 *p++ = Qnil;
|
|
|
3014
|
|
|
3015 backtrace.args = args;
|
|
|
3016 backtrace.nargs = nargs;
|
|
|
3017
|
|
|
3018 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3019
|
|
|
3020 UNGCPRO;
|
|
|
3021 }
|
|
0
|
3022 else if (max_args == MANY)
|
|
|
3023 {
|
|
|
3024 /* Pass a vector of evaluated arguments */
|
|
380
|
3025 struct gcpro gcpro1;
|
|
|
3026 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3027 REGISTER Lisp_Object *p = args;
|
|
|
3028
|
|
|
3029 GCPRO1 (args[0]);
|
|
|
3030 gcpro1.nvars = 0;
|
|
|
3031
|
|
|
3032 {
|
|
|
3033 REGISTER Lisp_Object arg;
|
|
|
3034 LIST_LOOP_2 (arg, original_args)
|
|
|
3035 {
|
|
|
3036 *p++ = Feval (arg);
|
|
|
3037 gcpro1.nvars++;
|
|
|
3038 }
|
|
|
3039 }
|
|
|
3040
|
|
|
3041 backtrace.args = args;
|
|
0
|
3042 backtrace.nargs = nargs;
|
|
|
3043
|
|
398
|
3044 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
380
|
3045 (nargs, args));
|
|
185
|
3046
|
|
0
|
3047 UNGCPRO;
|
|
380
|
3048 }
|
|
|
3049 else
|
|
|
3050 {
|
|
|
3051 wrong_number_of_arguments:
|
|
398
|
3052 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
380
|
3053 }
|
|
0
|
3054 }
|
|
|
3055 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3056 {
|
|
380
|
3057 struct gcpro gcpro1;
|
|
|
3058 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3059 REGISTER Lisp_Object *p = args;
|
|
|
3060
|
|
|
3061 GCPRO1 (args[0]);
|
|
|
3062 gcpro1.nvars = 0;
|
|
|
3063
|
|
|
3064 {
|
|
|
3065 REGISTER Lisp_Object arg;
|
|
|
3066 LIST_LOOP_2 (arg, original_args)
|
|
|
3067 {
|
|
|
3068 *p++ = Feval (arg);
|
|
|
3069 gcpro1.nvars++;
|
|
|
3070 }
|
|
|
3071 }
|
|
|
3072
|
|
|
3073 backtrace.args = args;
|
|
|
3074 backtrace.nargs = nargs;
|
|
|
3075 backtrace.evalargs = 0;
|
|
|
3076
|
|
|
3077 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3078
|
|
|
3079 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3080 if (backtrace.debug_on_exit)
|
|
|
3081 val = do_debug_on_exit (val);
|
|
|
3082 /* Don't do it again when we return to eval. */
|
|
|
3083 backtrace.debug_on_exit = 0;
|
|
|
3084
|
|
|
3085 UNGCPRO;
|
|
|
3086 }
|
|
|
3087 else if (CONSP (fun))
|
|
|
3088 {
|
|
|
3089 Lisp_Object funcar = XCAR (fun);
|
|
|
3090
|
|
0
|
3091 if (EQ (funcar, Qautoload))
|
|
|
3092 {
|
|
|
3093 do_autoload (fun, original_fun);
|
|
|
3094 goto retry;
|
|
|
3095 }
|
|
380
|
3096 else if (EQ (funcar, Qmacro))
|
|
|
3097 {
|
|
|
3098 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3099 }
|
|
0
|
3100 else if (EQ (funcar, Qlambda))
|
|
380
|
3101 {
|
|
|
3102 struct gcpro gcpro1;
|
|
|
3103 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3104 REGISTER Lisp_Object *p = args;
|
|
|
3105
|
|
|
3106 GCPRO1 (args[0]);
|
|
|
3107 gcpro1.nvars = 0;
|
|
|
3108
|
|
|
3109 {
|
|
|
3110 REGISTER Lisp_Object arg;
|
|
|
3111 LIST_LOOP_2 (arg, original_args)
|
|
|
3112 {
|
|
|
3113 *p++ = Feval (arg);
|
|
|
3114 gcpro1.nvars++;
|
|
|
3115 }
|
|
|
3116 }
|
|
|
3117
|
|
|
3118 UNGCPRO;
|
|
|
3119
|
|
|
3120 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3121 backtrace.nargs = nargs;
|
|
|
3122 backtrace.evalargs = 0;
|
|
|
3123
|
|
|
3124 val = funcall_lambda (fun, nargs, args);
|
|
|
3125
|
|
|
3126 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3127 if (backtrace.debug_on_exit)
|
|
|
3128 val = do_debug_on_exit (val);
|
|
|
3129 /* Don't do it again when we return to eval. */
|
|
|
3130 backtrace.debug_on_exit = 0;
|
|
|
3131 }
|
|
0
|
3132 else
|
|
|
3133 {
|
|
380
|
3134 goto invalid_function;
|
|
0
|
3135 }
|
|
|
3136 }
|
|
380
|
3137 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3138 {
|
|
|
3139 invalid_function:
|
|
398
|
3140 val = signal_invalid_function_error (fun);
|
|
380
|
3141 }
|
|
0
|
3142
|
|
|
3143 lisp_eval_depth--;
|
|
|
3144 if (backtrace.debug_on_exit)
|
|
|
3145 val = do_debug_on_exit (val);
|
|
116
|
3146 POP_BACKTRACE (backtrace);
|
|
173
|
3147 return val;
|
|
0
|
3148 }
|
|
|
3149
|
|
|
3150
|
|
380
|
3151 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3152 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3153 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3154 */
|
|
|
3155 (int nargs, Lisp_Object *args))
|
|
0
|
3156 {
|
|
|
3157 /* This function can GC */
|
|
|
3158 Lisp_Object fun;
|
|
|
3159 Lisp_Object val;
|
|
|
3160 struct backtrace backtrace;
|
|
380
|
3161 int fun_nargs = nargs - 1;
|
|
|
3162 Lisp_Object *fun_args = args + 1;
|
|
0
|
3163
|
|
|
3164 QUIT;
|
|
|
3165 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3166 /* Callers should gcpro lexpr args */
|
|
|
3167 garbage_collect_1 ();
|
|
|
3168
|
|
|
3169 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3170 {
|
|
|
3171 if (max_lisp_eval_depth < 100)
|
|
|
3172 max_lisp_eval_depth = 100;
|
|
|
3173 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3174 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3175 }
|
|
|
3176
|
|
380
|
3177 backtrace.pdlcount = specpdl_depth();
|
|
0
|
3178 backtrace.function = &args[0];
|
|
380
|
3179 backtrace.args = fun_args;
|
|
|
3180 backtrace.nargs = fun_nargs;
|
|
0
|
3181 backtrace.evalargs = 0;
|
|
|
3182 backtrace.debug_on_exit = 0;
|
|
116
|
3183 PUSH_BACKTRACE (backtrace);
|
|
0
|
3184
|
|
|
3185 if (debug_on_next_call)
|
|
|
3186 do_debug_on_call (Qlambda);
|
|
|
3187
|
|
|
3188 retry:
|
|
|
3189
|
|
|
3190 fun = args[0];
|
|
|
3191
|
|
241
|
3192 /* It might be useful to place this *after* all the checks. */
|
|
|
3193 if (profiling_active)
|
|
|
3194 profile_increase_call_count (fun);
|
|
|
3195
|
|
380
|
3196 /* We could call indirect_function directly, but profiling shows
|
|
|
3197 this is worth optimizing by partially unrolling the loop. */
|
|
0
|
3198 if (SYMBOLP (fun))
|
|
380
|
3199 {
|
|
|
3200 fun = XSYMBOL (fun)->function;
|
|
|
3201 if (SYMBOLP (fun))
|
|
|
3202 {
|
|
|
3203 fun = XSYMBOL (fun)->function;
|
|
|
3204 if (SYMBOLP (fun))
|
|
|
3205 fun = indirect_function (fun, 1);
|
|
|
3206 }
|
|
|
3207 }
|
|
0
|
3208
|
|
|
3209 if (SUBRP (fun))
|
|
|
3210 {
|
|
380
|
3211 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3212 int max_args = subr->max_args;
|
|
380
|
3213 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3214
|
|
|
3215 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
0
|
3216 {
|
|
380
|
3217 funcall_subr:
|
|
|
3218 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
0
|
3219 }
|
|
398
|
3220 else if (fun_nargs < subr->min_args)
|
|
|
3221 {
|
|
|
3222 goto wrong_number_of_arguments;
|
|
|
3223 }
|
|
380
|
3224 else if (fun_nargs < max_args)
|
|
0
|
3225 {
|
|
380
|
3226 Lisp_Object *p = spacious_args;
|
|
0
|
3227
|
|
|
3228 /* Default optionals to nil */
|
|
380
|
3229 while (fun_nargs--)
|
|
|
3230 *p++ = *fun_args++;
|
|
|
3231 while (p - spacious_args < max_args)
|
|
|
3232 *p++ = Qnil;
|
|
|
3233
|
|
|
3234 fun_args = spacious_args;
|
|
|
3235 goto funcall_subr;
|
|
|
3236 }
|
|
|
3237 else if (max_args == MANY)
|
|
|
3238 {
|
|
398
|
3239 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
380
|
3240 }
|
|
|
3241 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3242 {
|
|
|
3243 goto invalid_function;
|
|
0
|
3244 }
|
|
|
3245 else
|
|
380
|
3246 {
|
|
|
3247 wrong_number_of_arguments:
|
|
398
|
3248 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
380
|
3249 }
|
|
0
|
3250 }
|
|
|
3251 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3252 {
|
|
380
|
3253 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
0
|
3254 }
|
|
380
|
3255 else if (CONSP (fun))
|
|
0
|
3256 {
|
|
195
|
3257 Lisp_Object funcar = XCAR (fun);
|
|
0
|
3258
|
|
|
3259 if (EQ (funcar, Qlambda))
|
|
380
|
3260 {
|
|
|
3261 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3262 }
|
|
0
|
3263 else if (EQ (funcar, Qautoload))
|
|
|
3264 {
|
|
|
3265 do_autoload (fun, args[0]);
|
|
|
3266 goto retry;
|
|
|
3267 }
|
|
380
|
3268 else /* Can't funcall a macro */
|
|
0
|
3269 {
|
|
380
|
3270 goto invalid_function;
|
|
0
|
3271 }
|
|
|
3272 }
|
|
380
|
3273 else if (UNBOUNDP (fun))
|
|
|
3274 {
|
|
398
|
3275 val = signal_void_function_error (args[0]);
|
|
380
|
3276 }
|
|
|
3277 else
|
|
|
3278 {
|
|
|
3279 invalid_function:
|
|
398
|
3280 val = signal_invalid_function_error (fun);
|
|
380
|
3281 }
|
|
|
3282
|
|
0
|
3283 lisp_eval_depth--;
|
|
|
3284 if (backtrace.debug_on_exit)
|
|
|
3285 val = do_debug_on_exit (val);
|
|
116
|
3286 POP_BACKTRACE (backtrace);
|
|
0
|
3287 return val;
|
|
|
3288 }
|
|
|
3289
|
|
380
|
3290 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3291 Return t if OBJECT can be called as a function, else nil.
|
|
|
3292 A function is an object that can be applied to arguments,
|
|
|
3293 using for example `funcall' or `apply'.
|
|
20
|
3294 */
|
|
380
|
3295 (object))
|
|
0
|
3296 {
|
|
380
|
3297 if (SYMBOLP (object))
|
|
|
3298 object = indirect_function (object, 0);
|
|
|
3299
|
|
|
3300 return
|
|
|
3301 (SUBRP (object) ||
|
|
|
3302 COMPILED_FUNCTIONP (object) ||
|
|
|
3303 (CONSP (object) &&
|
|
|
3304 (EQ (XCAR (object), Qlambda) ||
|
|
|
3305 EQ (XCAR (object), Qautoload))))
|
|
|
3306 ? Qt : Qnil;
|
|
0
|
3307 }
|
|
|
3308
|
|
380
|
3309 static Lisp_Object
|
|
|
3310 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
0
|
3311 {
|
|
|
3312 Lisp_Object orig_function = function;
|
|
|
3313 Lisp_Object arglist;
|
|
|
3314
|
|
|
3315 retry:
|
|
|
3316
|
|
|
3317 if (SYMBOLP (function))
|
|
|
3318 function = indirect_function (function, 1);
|
|
|
3319
|
|
|
3320 if (SUBRP (function))
|
|
|
3321 {
|
|
380
|
3322 return function_min_args_p ?
|
|
|
3323 Fsubr_min_args (function):
|
|
|
3324 Fsubr_max_args (function);
|
|
|
3325 }
|
|
|
3326 else if (COMPILED_FUNCTIONP (function))
|
|
|
3327 {
|
|
|
3328 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
0
|
3329 }
|
|
380
|
3330 else if (CONSP (function))
|
|
0
|
3331 {
|
|
272
|
3332 Lisp_Object funcar = XCAR (function);
|
|
0
|
3333
|
|
|
3334 if (EQ (funcar, Qmacro))
|
|
|
3335 {
|
|
272
|
3336 function = XCDR (function);
|
|
0
|
3337 goto retry;
|
|
|
3338 }
|
|
380
|
3339 else if (EQ (funcar, Qautoload))
|
|
0
|
3340 {
|
|
|
3341 do_autoload (function, orig_function);
|
|
|
3342 goto retry;
|
|
|
3343 }
|
|
380
|
3344 else if (EQ (funcar, Qlambda))
|
|
|
3345 {
|
|
|
3346 arglist = Fcar (XCDR (function));
|
|
|
3347 }
|
|
0
|
3348 else
|
|
380
|
3349 {
|
|
|
3350 goto invalid_function;
|
|
|
3351 }
|
|
0
|
3352 }
|
|
|
3353 else
|
|
|
3354 {
|
|
|
3355 invalid_function:
|
|
398
|
3356 return signal_invalid_function_error (function);
|
|
0
|
3357 }
|
|
|
3358
|
|
380
|
3359 {
|
|
|
3360 int argcount = 0;
|
|
|
3361 Lisp_Object arg;
|
|
|
3362
|
|
|
3363 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3364 {
|
|
|
3365 if (EQ (arg, Qand_optional))
|
|
|
3366 {
|
|
|
3367 if (function_min_args_p)
|
|
|
3368 break;
|
|
|
3369 }
|
|
|
3370 else if (EQ (arg, Qand_rest))
|
|
|
3371 {
|
|
|
3372 if (function_min_args_p)
|
|
|
3373 break;
|
|
|
3374 else
|
|
|
3375 return Qnil;
|
|
|
3376 }
|
|
|
3377 else
|
|
|
3378 {
|
|
|
3379 argcount++;
|
|
|
3380 }
|
|
|
3381 }
|
|
|
3382
|
|
|
3383 return make_int (argcount);
|
|
|
3384 }
|
|
|
3385 }
|
|
|
3386
|
|
|
3387 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3388 Return the number of arguments a function may be called with.
|
|
|
3389 The function may be any form that can be passed to `funcall',
|
|
|
3390 any special form, or any macro.
|
|
|
3391 */
|
|
|
3392 (function))
|
|
|
3393 {
|
|
|
3394 return function_argcount (function, 1);
|
|
|
3395 }
|
|
|
3396
|
|
|
3397 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3398 Return the number of arguments a function may be called with.
|
|
|
3399 The function may be any form that can be passed to `funcall',
|
|
|
3400 any special form, or any macro.
|
|
|
3401 If the function takes an arbitrary number of arguments or is
|
|
|
3402 a built-in special form, nil is returned.
|
|
|
3403 */
|
|
|
3404 (function))
|
|
|
3405 {
|
|
|
3406 return function_argcount (function, 0);
|
|
0
|
3407 }
|
|
|
3408
|
|
|
3409
|
|
20
|
3410 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
380
|
3411 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
0
|
3412 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3413 */
|
|
|
3414 (int nargs, Lisp_Object *args))
|
|
0
|
3415 {
|
|
|
3416 /* This function can GC */
|
|
|
3417 Lisp_Object fun = args[0];
|
|
380
|
3418 Lisp_Object spread_arg = args [nargs - 1];
|
|
0
|
3419 int numargs;
|
|
|
3420 int funcall_nargs;
|
|
|
3421
|
|
380
|
3422 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
0
|
3423
|
|
|
3424 if (numargs == 0)
|
|
|
3425 /* (apply foo 0 1 '()) */
|
|
|
3426 return Ffuncall (nargs - 1, args);
|
|
|
3427 else if (numargs == 1)
|
|
|
3428 {
|
|
|
3429 /* (apply foo 0 1 '(2)) */
|
|
|
3430 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3431 return Ffuncall (nargs, args);
|
|
|
3432 }
|
|
|
3433
|
|
|
3434 /* -1 for function, -1 for spread arg */
|
|
|
3435 numargs = nargs - 2 + numargs;
|
|
|
3436 /* +1 for function */
|
|
|
3437 funcall_nargs = 1 + numargs;
|
|
|
3438
|
|
|
3439 if (SYMBOLP (fun))
|
|
|
3440 fun = indirect_function (fun, 0);
|
|
380
|
3441
|
|
|
3442 if (SUBRP (fun))
|
|
0
|
3443 {
|
|
380
|
3444 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3445 int max_args = subr->max_args;
|
|
|
3446
|
|
|
3447 if (numargs < subr->min_args
|
|
|
3448 || (max_args >= 0 && max_args < numargs))
|
|
|
3449 {
|
|
|
3450 /* Let funcall get the error */
|
|
|
3451 }
|
|
|
3452 else if (max_args > numargs)
|
|
|
3453 {
|
|
|
3454 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3455 by explicitly supplying nil's for optional values */
|
|
|
3456 funcall_nargs += (max_args - numargs);
|
|
|
3457 }
|
|
|
3458 }
|
|
380
|
3459 else if (UNBOUNDP (fun))
|
|
|
3460 {
|
|
|
3461 /* Let funcall get the error */
|
|
|
3462 fun = args[0];
|
|
|
3463 }
|
|
|
3464
|
|
0
|
3465 {
|
|
|
3466 REGISTER int i;
|
|
185
|
3467 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
0
|
3468 struct gcpro gcpro1;
|
|
|
3469
|
|
|
3470 GCPRO1 (*funcall_args);
|
|
|
3471 gcpro1.nvars = funcall_nargs;
|
|
|
3472
|
|
|
3473 /* Copy in the unspread args */
|
|
|
3474 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3475 /* Spread the last arg we got. Its first element goes in
|
|
|
3476 the slot that it used to occupy, hence this value of I. */
|
|
185
|
3477 for (i = nargs - 1;
|
|
0
|
3478 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3479 i++, spread_arg = XCDR (spread_arg))
|
|
|
3480 {
|
|
|
3481 funcall_args [i] = XCAR (spread_arg);
|
|
|
3482 }
|
|
|
3483 /* Supply nil for optional args (to subrs) */
|
|
|
3484 for (; i < funcall_nargs; i++)
|
|
|
3485 funcall_args[i] = Qnil;
|
|
|
3486
|
|
|
3487
|
|
|
3488 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3489 }
|
|
|
3490 }
|
|
|
3491
|
|
|
3492
|
|
380
|
3493 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3494 return the result of evaluation. */
|
|
0
|
3495
|
|
|
3496 static Lisp_Object
|
|
380
|
3497 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
0
|
3498 {
|
|
|
3499 /* This function can GC */
|
|
380
|
3500 Lisp_Object symbol, arglist, body, tail;
|
|
|
3501 int speccount = specpdl_depth();
|
|
|
3502 REGISTER int i = 0;
|
|
|
3503
|
|
|
3504 tail = XCDR (fun);
|
|
|
3505
|
|
|
3506 if (!CONSP (tail))
|
|
|
3507 goto invalid_function;
|
|
|
3508
|
|
|
3509 arglist = XCAR (tail);
|
|
|
3510 body = XCDR (tail);
|
|
|
3511
|
|
|
3512 {
|
|
|
3513 int optional = 0, rest = 0;
|
|
|
3514
|
|
|
3515 EXTERNAL_LIST_LOOP_3 (symbol, arglist, tail)
|
|
|
3516 {
|
|
|
3517 if (!SYMBOLP (symbol))
|
|
|
3518 goto invalid_function;
|
|
|
3519 if (EQ (symbol, Qand_rest))
|
|
|
3520 rest = 1;
|
|
|
3521 else if (EQ (symbol, Qand_optional))
|
|
|
3522 optional = 1;
|
|
|
3523 else if (rest)
|
|
|
3524 {
|
|
|
3525 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3526 i = nargs;
|
|
|
3527 }
|
|
|
3528 else if (i < nargs)
|
|
|
3529 specbind (symbol, args[i++]);
|
|
|
3530 else if (!optional)
|
|
|
3531 goto wrong_number_of_arguments;
|
|
|
3532 else
|
|
|
3533 specbind (symbol, Qnil);
|
|
|
3534 }
|
|
|
3535 }
|
|
0
|
3536
|
|
|
3537 if (i < nargs)
|
|
380
|
3538 goto wrong_number_of_arguments;
|
|
|
3539
|
|
|
3540 return unbind_to (speccount, Fprogn (body));
|
|
|
3541
|
|
|
3542 wrong_number_of_arguments:
|
|
398
|
3543 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
380
|
3544
|
|
|
3545 invalid_function:
|
|
398
|
3546 return signal_invalid_function_error (fun);
|
|
0
|
3547 }
|
|
380
|
3548
|
|
0
|
3549
|
|
380
|
3550 /************************************************************************/
|
|
|
3551 /* Run hook variables in various ways. */
|
|
|
3552 /************************************************************************/
|
|
0
|
3553
|
|
20
|
3554 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3555 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3556 Each argument should be a symbol, a hook variable.
|
|
|
3557 These symbols are processed in the order specified.
|
|
|
3558 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3559 or a list of functions to be called to run the hook.
|
|
|
3560 If the value is a function, it is called with no arguments.
|
|
|
3561 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3562
|
|
|
3563 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3564 not `make-local-variable'.
|
|
20
|
3565 */
|
|
|
3566 (int nargs, Lisp_Object *args))
|
|
0
|
3567 {
|
|
|
3568 REGISTER int i;
|
|
|
3569
|
|
|
3570 for (i = 0; i < nargs; i++)
|
|
187
|
3571 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
0
|
3572
|
|
|
3573 return Qnil;
|
|
|
3574 }
|
|
185
|
3575
|
|
20
|
3576 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3577 Run HOOK with the specified arguments ARGS.
|
|
|
3578 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3579 value, that value may be a function or a list of functions to be
|
|
|
3580 called to run the hook. If the value is a function, it is called with
|
|
|
3581 the given arguments and its return value is returned. If it is a list
|
|
|
3582 of functions, those functions are called, in order,
|
|
|
3583 with the given arguments ARGS.
|
|
371
|
3584 It is best not to depend on the value return by `run-hook-with-args',
|
|
0
|
3585 as that may change.
|
|
|
3586
|
|
|
3587 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3588 not `make-local-variable'.
|
|
20
|
3589 */
|
|
|
3590 (int nargs, Lisp_Object *args))
|
|
0
|
3591 {
|
|
|
3592 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3593 }
|
|
|
3594
|
|
20
|
3595 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3596 Run HOOK with the specified arguments ARGS.
|
|
|
3597 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3598 be a list of functions. We call those functions, one by one,
|
|
|
3599 passing arguments ARGS to each of them, until one of them
|
|
|
3600 returns a non-nil value. Then we return that value.
|
|
|
3601 If all the functions return nil, we return nil.
|
|
|
3602
|
|
|
3603 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3604 not `make-local-variable'.
|
|
20
|
3605 */
|
|
|
3606 (int nargs, Lisp_Object *args))
|
|
0
|
3607 {
|
|
|
3608 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3609 }
|
|
|
3610
|
|
20
|
3611 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3612 Run HOOK with the specified arguments ARGS.
|
|
|
3613 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3614 be a list of functions. We call those functions, one by one,
|
|
|
3615 passing arguments ARGS to each of them, until one of them
|
|
|
3616 returns nil. Then we return nil.
|
|
|
3617 If all the functions return non-nil, we return non-nil.
|
|
|
3618
|
|
|
3619 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3620 not `make-local-variable'.
|
|
20
|
3621 */
|
|
|
3622 (int nargs, Lisp_Object *args))
|
|
0
|
3623 {
|
|
|
3624 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3625 }
|
|
|
3626
|
|
|
3627 /* ARGS[0] should be a hook symbol.
|
|
|
3628 Call each of the functions in the hook value, passing each of them
|
|
|
3629 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3630 COND specifies a condition to test after each call
|
|
|
3631 to decide whether to stop.
|
|
|
3632 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3633 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3634
|
|
|
3635 Lisp_Object
|
|
|
3636 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3637 enum run_hooks_condition cond)
|
|
|
3638 {
|
|
|
3639 Lisp_Object sym, val, ret;
|
|
|
3640
|
|
|
3641 if (!initialized || preparing_for_armageddon)
|
|
|
3642 /* We need to bail out of here pronto. */
|
|
|
3643 return Qnil;
|
|
|
3644
|
|
|
3645 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3646 will also be true unless something is really hosed. */
|
|
|
3647 assert (!gc_in_progress);
|
|
|
3648
|
|
|
3649 sym = args[0];
|
|
|
3650 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3651 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3652
|
|
|
3653 if (UNBOUNDP (val) || NILP (val))
|
|
|
3654 return ret;
|
|
|
3655 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3656 {
|
|
|
3657 args[0] = val;
|
|
|
3658 return Ffuncall (nargs, args);
|
|
|
3659 }
|
|
|
3660 else
|
|
|
3661 {
|
|
398
|
3662 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3663 Lisp_Object globals = Qnil;
|
|
|
3664 GCPRO3 (sym, val, globals);
|
|
0
|
3665
|
|
|
3666 for (;
|
|
|
3667 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3668 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3669 : !NILP (ret)));
|
|
|
3670 val = XCDR (val))
|
|
|
3671 {
|
|
|
3672 if (EQ (XCAR (val), Qt))
|
|
|
3673 {
|
|
|
3674 /* t indicates this hook has a local binding;
|
|
|
3675 it means to run the global binding too. */
|
|
398
|
3676 globals = Fdefault_value (sym);
|
|
298
|
3677
|
|
|
3678 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3679 ! NILP (globals))
|
|
|
3680 {
|
|
|
3681 args[0] = globals;
|
|
|
3682 ret = Ffuncall (nargs, args);
|
|
|
3683 }
|
|
|
3684 else
|
|
0
|
3685 {
|
|
298
|
3686 for (;
|
|
|
3687 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3688 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3689 ? NILP (ret)
|
|
|
3690 : !NILP (ret)));
|
|
|
3691 globals = XCDR (globals))
|
|
|
3692 {
|
|
|
3693 args[0] = XCAR (globals);
|
|
|
3694 /* In a global value, t should not occur. If it does, we
|
|
|
3695 must ignore it to avoid an endless loop. */
|
|
|
3696 if (!EQ (args[0], Qt))
|
|
|
3697 ret = Ffuncall (nargs, args);
|
|
|
3698 }
|
|
0
|
3699 }
|
|
|
3700 }
|
|
|
3701 else
|
|
|
3702 {
|
|
|
3703 args[0] = XCAR (val);
|
|
|
3704 ret = Ffuncall (nargs, args);
|
|
|
3705 }
|
|
|
3706 }
|
|
|
3707
|
|
|
3708 UNGCPRO;
|
|
|
3709 return ret;
|
|
|
3710 }
|
|
|
3711 }
|
|
|
3712
|
|
|
3713 Lisp_Object
|
|
|
3714 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3715 enum run_hooks_condition cond)
|
|
|
3716 {
|
|
|
3717 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3718 }
|
|
|
3719
|
|
|
3720 #if 0
|
|
|
3721
|
|
|
3722 /* From FSF 19.30, not currently used */
|
|
|
3723
|
|
|
3724 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3725 present value of that symbol.
|
|
|
3726 Call each element of FUNLIST,
|
|
|
3727 passing each of them the rest of ARGS.
|
|
|
3728 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3729 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3730
|
|
|
3731 Lisp_Object
|
|
|
3732 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3733 {
|
|
380
|
3734 Lisp_Object sym = args[0];
|
|
0
|
3735 Lisp_Object val;
|
|
|
3736 struct gcpro gcpro1, gcpro2;
|
|
|
3737
|
|
|
3738 GCPRO2 (sym, val);
|
|
|
3739
|
|
|
3740 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3741 {
|
|
|
3742 if (EQ (XCAR (val), Qt))
|
|
|
3743 {
|
|
|
3744 /* t indicates this hook has a local binding;
|
|
|
3745 it means to run the global binding too. */
|
|
|
3746 Lisp_Object globals;
|
|
|
3747
|
|
|
3748 for (globals = Fdefault_value (sym);
|
|
|
3749 CONSP (globals);
|
|
|
3750 globals = XCDR (globals))
|
|
|
3751 {
|
|
|
3752 args[0] = XCAR (globals);
|
|
|
3753 /* In a global value, t should not occur. If it does, we
|
|
|
3754 must ignore it to avoid an endless loop. */
|
|
|
3755 if (!EQ (args[0], Qt))
|
|
|
3756 Ffuncall (nargs, args);
|
|
|
3757 }
|
|
|
3758 }
|
|
|
3759 else
|
|
|
3760 {
|
|
|
3761 args[0] = XCAR (val);
|
|
|
3762 Ffuncall (nargs, args);
|
|
|
3763 }
|
|
|
3764 }
|
|
|
3765 UNGCPRO;
|
|
|
3766 return Qnil;
|
|
|
3767 }
|
|
|
3768
|
|
|
3769 #endif /* 0 */
|
|
|
3770
|
|
|
3771 void
|
|
|
3772 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3773 {
|
|
|
3774 /* This function can GC */
|
|
|
3775 struct gcpro gcpro1;
|
|
|
3776 int i;
|
|
|
3777 va_list vargs;
|
|
185
|
3778 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3779
|
|
|
3780 va_start (vargs, nargs);
|
|
|
3781 funcall_args[0] = hook_var;
|
|
|
3782 for (i = 0; i < nargs; i++)
|
|
|
3783 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3784 va_end (vargs);
|
|
|
3785
|
|
|
3786 GCPRO1 (*funcall_args);
|
|
|
3787 gcpro1.nvars = nargs + 1;
|
|
|
3788 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3789 UNGCPRO;
|
|
|
3790 }
|
|
|
3791
|
|
|
3792 void
|
|
|
3793 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3794 int nargs, ...)
|
|
|
3795 {
|
|
|
3796 /* This function can GC */
|
|
|
3797 struct gcpro gcpro1;
|
|
|
3798 int i;
|
|
|
3799 va_list vargs;
|
|
185
|
3800 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3801
|
|
|
3802 va_start (vargs, nargs);
|
|
|
3803 funcall_args[0] = hook_var;
|
|
|
3804 for (i = 0; i < nargs; i++)
|
|
|
3805 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3806 va_end (vargs);
|
|
|
3807
|
|
|
3808 GCPRO1 (*funcall_args);
|
|
|
3809 gcpro1.nvars = nargs + 1;
|
|
|
3810 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3811 RUN_HOOKS_TO_COMPLETION);
|
|
|
3812 UNGCPRO;
|
|
|
3813 }
|
|
|
3814
|
|
|
3815 Lisp_Object
|
|
|
3816 run_hook (Lisp_Object hook)
|
|
|
3817 {
|
|
|
3818 Frun_hooks (1, &hook);
|
|
|
3819 return Qnil;
|
|
|
3820 }
|
|
|
3821
|
|
|
3822
|
|
380
|
3823 /************************************************************************/
|
|
|
3824 /* Front-ends to eval, funcall, apply */
|
|
|
3825 /************************************************************************/
|
|
0
|
3826
|
|
|
3827 /* Apply fn to arg */
|
|
|
3828 Lisp_Object
|
|
|
3829 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3830 {
|
|
|
3831 /* This function can GC */
|
|
|
3832 struct gcpro gcpro1;
|
|
|
3833 Lisp_Object args[2];
|
|
|
3834
|
|
|
3835 if (NILP (arg))
|
|
173
|
3836 return Ffuncall (1, &fn);
|
|
0
|
3837 GCPRO1 (args[0]);
|
|
|
3838 gcpro1.nvars = 2;
|
|
|
3839 args[0] = fn;
|
|
|
3840 args[1] = arg;
|
|
|
3841 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3842 }
|
|
|
3843
|
|
|
3844 /* Call function fn on no arguments */
|
|
|
3845 Lisp_Object
|
|
|
3846 call0 (Lisp_Object fn)
|
|
|
3847 {
|
|
|
3848 /* This function can GC */
|
|
|
3849 struct gcpro gcpro1;
|
|
|
3850
|
|
|
3851 GCPRO1 (fn);
|
|
|
3852 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3853 }
|
|
|
3854
|
|
|
3855 /* Call function fn with argument arg0 */
|
|
|
3856 Lisp_Object
|
|
|
3857 call1 (Lisp_Object fn,
|
|
|
3858 Lisp_Object arg0)
|
|
|
3859 {
|
|
|
3860 /* This function can GC */
|
|
|
3861 struct gcpro gcpro1;
|
|
185
|
3862 Lisp_Object args[2];
|
|
0
|
3863 args[0] = fn;
|
|
|
3864 args[1] = arg0;
|
|
|
3865 GCPRO1 (args[0]);
|
|
|
3866 gcpro1.nvars = 2;
|
|
|
3867 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3868 }
|
|
|
3869
|
|
|
3870 /* Call function fn with arguments arg0, arg1 */
|
|
|
3871 Lisp_Object
|
|
|
3872 call2 (Lisp_Object fn,
|
|
|
3873 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3874 {
|
|
|
3875 /* This function can GC */
|
|
|
3876 struct gcpro gcpro1;
|
|
|
3877 Lisp_Object args[3];
|
|
|
3878 args[0] = fn;
|
|
|
3879 args[1] = arg0;
|
|
|
3880 args[2] = arg1;
|
|
|
3881 GCPRO1 (args[0]);
|
|
|
3882 gcpro1.nvars = 3;
|
|
|
3883 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3884 }
|
|
|
3885
|
|
|
3886 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3887 Lisp_Object
|
|
|
3888 call3 (Lisp_Object fn,
|
|
|
3889 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3890 {
|
|
|
3891 /* This function can GC */
|
|
|
3892 struct gcpro gcpro1;
|
|
|
3893 Lisp_Object args[4];
|
|
|
3894 args[0] = fn;
|
|
|
3895 args[1] = arg0;
|
|
|
3896 args[2] = arg1;
|
|
|
3897 args[3] = arg2;
|
|
|
3898 GCPRO1 (args[0]);
|
|
|
3899 gcpro1.nvars = 4;
|
|
|
3900 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3901 }
|
|
|
3902
|
|
|
3903 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3904 Lisp_Object
|
|
|
3905 call4 (Lisp_Object fn,
|
|
|
3906 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3907 Lisp_Object arg3)
|
|
|
3908 {
|
|
|
3909 /* This function can GC */
|
|
|
3910 struct gcpro gcpro1;
|
|
|
3911 Lisp_Object args[5];
|
|
|
3912 args[0] = fn;
|
|
|
3913 args[1] = arg0;
|
|
|
3914 args[2] = arg1;
|
|
|
3915 args[3] = arg2;
|
|
|
3916 args[4] = arg3;
|
|
|
3917 GCPRO1 (args[0]);
|
|
|
3918 gcpro1.nvars = 5;
|
|
|
3919 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3920 }
|
|
|
3921
|
|
|
3922 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3923 Lisp_Object
|
|
|
3924 call5 (Lisp_Object fn,
|
|
185
|
3925 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3926 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3927 {
|
|
|
3928 /* This function can GC */
|
|
|
3929 struct gcpro gcpro1;
|
|
|
3930 Lisp_Object args[6];
|
|
|
3931 args[0] = fn;
|
|
|
3932 args[1] = arg0;
|
|
|
3933 args[2] = arg1;
|
|
|
3934 args[3] = arg2;
|
|
|
3935 args[4] = arg3;
|
|
|
3936 args[5] = arg4;
|
|
|
3937 GCPRO1 (args[0]);
|
|
|
3938 gcpro1.nvars = 6;
|
|
|
3939 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
3940 }
|
|
|
3941
|
|
|
3942 Lisp_Object
|
|
|
3943 call6 (Lisp_Object fn,
|
|
185
|
3944 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3945 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
3946 {
|
|
|
3947 /* This function can GC */
|
|
|
3948 struct gcpro gcpro1;
|
|
|
3949 Lisp_Object args[7];
|
|
|
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 GCPRO1 (args[0]);
|
|
|
3958 gcpro1.nvars = 7;
|
|
|
3959 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
3960 }
|
|
|
3961
|
|
|
3962 Lisp_Object
|
|
|
3963 call7 (Lisp_Object fn,
|
|
185
|
3964 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3965 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3966 Lisp_Object arg6)
|
|
|
3967 {
|
|
|
3968 /* This function can GC */
|
|
|
3969 struct gcpro gcpro1;
|
|
|
3970 Lisp_Object args[8];
|
|
|
3971 args[0] = fn;
|
|
|
3972 args[1] = arg0;
|
|
|
3973 args[2] = arg1;
|
|
|
3974 args[3] = arg2;
|
|
|
3975 args[4] = arg3;
|
|
|
3976 args[5] = arg4;
|
|
|
3977 args[6] = arg5;
|
|
|
3978 args[7] = arg6;
|
|
|
3979 GCPRO1 (args[0]);
|
|
|
3980 gcpro1.nvars = 8;
|
|
|
3981 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
3982 }
|
|
|
3983
|
|
|
3984 Lisp_Object
|
|
|
3985 call8 (Lisp_Object fn,
|
|
185
|
3986 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3987 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3988 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
3989 {
|
|
|
3990 /* This function can GC */
|
|
|
3991 struct gcpro gcpro1;
|
|
|
3992 Lisp_Object args[9];
|
|
|
3993 args[0] = fn;
|
|
|
3994 args[1] = arg0;
|
|
|
3995 args[2] = arg1;
|
|
|
3996 args[3] = arg2;
|
|
|
3997 args[4] = arg3;
|
|
|
3998 args[5] = arg4;
|
|
|
3999 args[6] = arg5;
|
|
|
4000 args[7] = arg6;
|
|
|
4001 args[8] = arg7;
|
|
|
4002 GCPRO1 (args[0]);
|
|
|
4003 gcpro1.nvars = 9;
|
|
|
4004 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4005 }
|
|
|
4006
|
|
|
4007 Lisp_Object
|
|
|
4008 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4009 {
|
|
272
|
4010 if (current_buffer == buf)
|
|
|
4011 return call0 (fn);
|
|
|
4012 else
|
|
0
|
4013 {
|
|
272
|
4014 Lisp_Object val;
|
|
380
|
4015 int speccount = specpdl_depth();
|
|
0
|
4016 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4017 set_buffer_internal (buf);
|
|
272
|
4018 val = call0 (fn);
|
|
|
4019 unbind_to (speccount, Qnil);
|
|
|
4020 return val;
|
|
0
|
4021 }
|
|
|
4022 }
|
|
|
4023
|
|
|
4024 Lisp_Object
|
|
|
4025 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4026 Lisp_Object arg0)
|
|
|
4027 {
|
|
272
|
4028 if (current_buffer == buf)
|
|
|
4029 return call1 (fn, arg0);
|
|
|
4030 else
|
|
0
|
4031 {
|
|
272
|
4032 Lisp_Object val;
|
|
380
|
4033 int speccount = specpdl_depth();
|
|
0
|
4034 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4035 set_buffer_internal (buf);
|
|
272
|
4036 val = call1 (fn, arg0);
|
|
|
4037 unbind_to (speccount, Qnil);
|
|
|
4038 return val;
|
|
0
|
4039 }
|
|
|
4040 }
|
|
|
4041
|
|
|
4042 Lisp_Object
|
|
|
4043 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4044 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4045 {
|
|
272
|
4046 if (current_buffer == buf)
|
|
|
4047 return call2 (fn, arg0, arg1);
|
|
|
4048 else
|
|
0
|
4049 {
|
|
272
|
4050 Lisp_Object val;
|
|
380
|
4051 int speccount = specpdl_depth();
|
|
0
|
4052 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4053 set_buffer_internal (buf);
|
|
272
|
4054 val = call2 (fn, arg0, arg1);
|
|
|
4055 unbind_to (speccount, Qnil);
|
|
|
4056 return val;
|
|
0
|
4057 }
|
|
|
4058 }
|
|
|
4059
|
|
|
4060 Lisp_Object
|
|
|
4061 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4062 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4063 {
|
|
272
|
4064 if (current_buffer == buf)
|
|
|
4065 return call3 (fn, arg0, arg1, arg2);
|
|
|
4066 else
|
|
0
|
4067 {
|
|
272
|
4068 Lisp_Object val;
|
|
380
|
4069 int speccount = specpdl_depth();
|
|
0
|
4070 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4071 set_buffer_internal (buf);
|
|
272
|
4072 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4073 unbind_to (speccount, Qnil);
|
|
|
4074 return val;
|
|
0
|
4075 }
|
|
|
4076 }
|
|
|
4077
|
|
|
4078 Lisp_Object
|
|
|
4079 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4080 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4081 Lisp_Object arg3)
|
|
|
4082 {
|
|
272
|
4083 if (current_buffer == buf)
|
|
|
4084 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4085 else
|
|
0
|
4086 {
|
|
272
|
4087 Lisp_Object val;
|
|
380
|
4088 int speccount = specpdl_depth();
|
|
0
|
4089 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4090 set_buffer_internal (buf);
|
|
272
|
4091 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4092 unbind_to (speccount, Qnil);
|
|
|
4093 return val;
|
|
0
|
4094 }
|
|
|
4095 }
|
|
|
4096
|
|
|
4097 Lisp_Object
|
|
|
4098 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4099 {
|
|
272
|
4100 if (current_buffer == buf)
|
|
|
4101 return Feval (form);
|
|
|
4102 else
|
|
0
|
4103 {
|
|
272
|
4104 Lisp_Object val;
|
|
380
|
4105 int speccount = specpdl_depth();
|
|
0
|
4106 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4107 set_buffer_internal (buf);
|
|
272
|
4108 val = Feval (form);
|
|
|
4109 unbind_to (speccount, Qnil);
|
|
|
4110 return val;
|
|
0
|
4111 }
|
|
|
4112 }
|
|
|
4113
|
|
|
4114
|
|
380
|
4115 /************************************************************************/
|
|
|
4116 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4117 /************************************************************************/
|
|
0
|
4118
|
|
|
4119 /* Call function fn on no arguments, with condition handler */
|
|
|
4120 Lisp_Object
|
|
|
4121 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4122 {
|
|
|
4123 /* This function can GC */
|
|
|
4124 struct gcpro gcpro1;
|
|
|
4125 Lisp_Object args[2];
|
|
|
4126 args[0] = handler;
|
|
|
4127 args[1] = fn;
|
|
|
4128 GCPRO1 (args[0]);
|
|
|
4129 gcpro1.nvars = 2;
|
|
|
4130 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4131 }
|
|
|
4132
|
|
|
4133 /* Call function fn with argument arg0, with condition handler */
|
|
|
4134 Lisp_Object
|
|
|
4135 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4136 Lisp_Object arg0)
|
|
|
4137 {
|
|
|
4138 /* This function can GC */
|
|
|
4139 struct gcpro gcpro1;
|
|
|
4140 Lisp_Object args[3];
|
|
|
4141 args[0] = handler;
|
|
|
4142 args[1] = fn;
|
|
|
4143 args[2] = arg0;
|
|
|
4144 GCPRO1 (args[0]);
|
|
|
4145 gcpro1.nvars = 3;
|
|
|
4146 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4147 }
|
|
|
4148
|
|
|
4149
|
|
|
4150 /* The following functions provide you with error-trapping versions
|
|
|
4151 of the various front-ends above. They take an additional
|
|
|
4152 "warning_string" argument; if non-zero, a warning with this
|
|
|
4153 string and the actual error that occurred will be displayed
|
|
|
4154 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4155 QUIT is inhibited while these functions are running, and if
|
|
|
4156 an error occurs, Qunbound is returned instead of the normal
|
|
|
4157 return value.
|
|
|
4158 */
|
|
|
4159
|
|
185
|
4160 /* #### This stuff needs to catch throws as well. We need to
|
|
0
|
4161 improve internal_catch() so it can take a "catch anything"
|
|
|
4162 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4163
|
|
|
4164 static Lisp_Object
|
|
|
4165 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4166 {
|
|
|
4167 if (!NILP (errordata))
|
|
|
4168 {
|
|
|
4169 Lisp_Object args[2];
|
|
185
|
4170
|
|
0
|
4171 if (!NILP (arg))
|
|
|
4172 {
|
|
|
4173 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4174 args[0] = build_string (str);
|
|
|
4175 }
|
|
|
4176 else
|
|
|
4177 args[0] = build_string ("error");
|
|
|
4178 /* #### This should call
|
|
|
4179 (with-output-to-string (display-error errordata))
|
|
|
4180 but that stuff is all in Lisp currently. */
|
|
|
4181 args[1] = errordata;
|
|
|
4182 warn_when_safe_lispobj
|
|
|
4183 (Qerror, Qwarning,
|
|
398
|
4184 emacs_doprnt_string_lisp ((const Bufbyte *) "%s: %s",
|
|
0
|
4185 Qnil, -1, 2, args));
|
|
|
4186 }
|
|
|
4187 return Qunbound;
|
|
|
4188 }
|
|
|
4189
|
|
|
4190 static Lisp_Object
|
|
|
4191 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4192 {
|
|
|
4193 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4194 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4195 return caught_a_squirmer (errordata, arg);
|
|
|
4196 }
|
|
|
4197
|
|
|
4198 static Lisp_Object
|
|
|
4199 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4200 {
|
|
|
4201 Lisp_Object hook = Fcar (arg);
|
|
|
4202 arg = Fcdr (arg);
|
|
|
4203 /* Clear out the hook. */
|
|
|
4204 Fset (hook, Qnil);
|
|
|
4205 return caught_a_squirmer (errordata, arg);
|
|
|
4206 }
|
|
|
4207
|
|
|
4208 static Lisp_Object
|
|
|
4209 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4210 Lisp_Object arg)
|
|
|
4211 {
|
|
|
4212 Lisp_Object hook = Fcar (arg);
|
|
|
4213 arg = Fcdr (arg);
|
|
|
4214 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4215 /* Clear out the hook. */
|
|
|
4216 Fset (hook, Qnil);
|
|
|
4217 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4218 }
|
|
|
4219
|
|
|
4220 static Lisp_Object
|
|
|
4221 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4222 {
|
|
|
4223 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4224 }
|
|
|
4225
|
|
|
4226 Lisp_Object
|
|
398
|
4227 eval_in_buffer_trapping_errors (const char *warning_string,
|
|
0
|
4228 struct buffer *buf, Lisp_Object form)
|
|
|
4229 {
|
|
380
|
4230 int speccount = specpdl_depth();
|
|
0
|
4231 Lisp_Object tem;
|
|
272
|
4232 Lisp_Object buffer;
|
|
0
|
4233 Lisp_Object cons;
|
|
|
4234 Lisp_Object opaque;
|
|
|
4235 struct gcpro gcpro1, gcpro2;
|
|
|
4236
|
|
|
4237 XSETBUFFER (buffer, buf);
|
|
|
4238
|
|
|
4239 specbind (Qinhibit_quit, Qt);
|
|
|
4240 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4241
|
|
|
4242 cons = noseeum_cons (buffer, form);
|
|
398
|
4243 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4244 GCPRO2 (cons, opaque);
|
|
|
4245 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4246 tem = condition_case_1 (Qerror,
|
|
|
4247 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4248 caught_a_squirmer, opaque);
|
|
|
4249 free_cons (XCONS (cons));
|
|
398
|
4250 if (OPAQUE_PTRP (opaque))
|
|
0
|
4251 free_opaque_ptr (opaque);
|
|
|
4252 UNGCPRO;
|
|
185
|
4253
|
|
0
|
4254 /* gc_currently_forbidden = 0; */
|
|
|
4255 return unbind_to (speccount, tem);
|
|
|
4256 }
|
|
|
4257
|
|
|
4258 static Lisp_Object
|
|
|
4259 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4260 {
|
|
|
4261 /* This function can GC */
|
|
|
4262 run_hook (hook_symbol);
|
|
|
4263 return Qnil;
|
|
|
4264 }
|
|
|
4265
|
|
|
4266 Lisp_Object
|
|
398
|
4267 run_hook_trapping_errors (const char *warning_string, Lisp_Object hook_symbol)
|
|
0
|
4268 {
|
|
272
|
4269 int speccount;
|
|
0
|
4270 Lisp_Object tem;
|
|
|
4271 Lisp_Object opaque;
|
|
|
4272 struct gcpro gcpro1;
|
|
|
4273
|
|
|
4274 if (!initialized || preparing_for_armageddon)
|
|
|
4275 return Qnil;
|
|
|
4276 tem = find_symbol_value (hook_symbol);
|
|
|
4277 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4278 return Qnil;
|
|
|
4279
|
|
380
|
4280 speccount = specpdl_depth();
|
|
0
|
4281 specbind (Qinhibit_quit, Qt);
|
|
|
4282
|
|
398
|
4283 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4284 GCPRO1 (opaque);
|
|
|
4285 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4286 tem = condition_case_1 (Qerror,
|
|
|
4287 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4288 caught_a_squirmer, opaque);
|
|
398
|
4289 if (OPAQUE_PTRP (opaque))
|
|
0
|
4290 free_opaque_ptr (opaque);
|
|
|
4291 UNGCPRO;
|
|
|
4292
|
|
|
4293 return unbind_to (speccount, tem);
|
|
|
4294 }
|
|
|
4295
|
|
|
4296 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4297 if an error occurs. */
|
|
|
4298
|
|
|
4299 Lisp_Object
|
|
398
|
4300 safe_run_hook_trapping_errors (const char *warning_string,
|
|
0
|
4301 Lisp_Object hook_symbol,
|
|
|
4302 int allow_quit)
|
|
|
4303 {
|
|
380
|
4304 int speccount = specpdl_depth();
|
|
0
|
4305 Lisp_Object tem;
|
|
|
4306 Lisp_Object cons = Qnil;
|
|
|
4307 struct gcpro gcpro1;
|
|
|
4308
|
|
|
4309 if (!initialized || preparing_for_armageddon)
|
|
|
4310 return Qnil;
|
|
|
4311 tem = find_symbol_value (hook_symbol);
|
|
|
4312 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4313 return Qnil;
|
|
|
4314
|
|
|
4315 if (!allow_quit)
|
|
|
4316 specbind (Qinhibit_quit, Qt);
|
|
|
4317
|
|
185
|
4318 cons = noseeum_cons (hook_symbol,
|
|
398
|
4319 warning_string ? make_opaque_ptr ((void *)warning_string)
|
|
0
|
4320 : Qnil);
|
|
|
4321 GCPRO1 (cons);
|
|
|
4322 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4323 tem = condition_case_1 (Qerror,
|
|
|
4324 catch_them_squirmers_run_hook,
|
|
|
4325 hook_symbol,
|
|
|
4326 allow_quit ?
|
|
|
4327 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4328 safe_run_hook_caught_a_squirmer,
|
|
|
4329 cons);
|
|
398
|
4330 if (OPAQUE_PTRP (XCDR (cons)))
|
|
0
|
4331 free_opaque_ptr (XCDR (cons));
|
|
|
4332 free_cons (XCONS (cons));
|
|
|
4333 UNGCPRO;
|
|
|
4334
|
|
|
4335 return unbind_to (speccount, tem);
|
|
|
4336 }
|
|
|
4337
|
|
|
4338 static Lisp_Object
|
|
|
4339 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4340 {
|
|
|
4341 /* This function can GC */
|
|
|
4342 return call0 (function);
|
|
|
4343 }
|
|
|
4344
|
|
|
4345 Lisp_Object
|
|
398
|
4346 call0_trapping_errors (const char *warning_string, Lisp_Object function)
|
|
0
|
4347 {
|
|
272
|
4348 int speccount;
|
|
0
|
4349 Lisp_Object tem;
|
|
|
4350 Lisp_Object opaque = Qnil;
|
|
|
4351 struct gcpro gcpro1, gcpro2;
|
|
|
4352
|
|
|
4353 if (SYMBOLP (function))
|
|
|
4354 {
|
|
|
4355 tem = XSYMBOL (function)->function;
|
|
|
4356 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4357 return Qnil;
|
|
0
|
4358 }
|
|
|
4359
|
|
|
4360 GCPRO2 (opaque, function);
|
|
380
|
4361 speccount = specpdl_depth();
|
|
0
|
4362 specbind (Qinhibit_quit, Qt);
|
|
|
4363 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4364
|
|
398
|
4365 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4366 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4367 tem = condition_case_1 (Qerror,
|
|
|
4368 catch_them_squirmers_call0, function,
|
|
|
4369 caught_a_squirmer, opaque);
|
|
398
|
4370 if (OPAQUE_PTRP (opaque))
|
|
0
|
4371 free_opaque_ptr (opaque);
|
|
|
4372 UNGCPRO;
|
|
|
4373
|
|
|
4374 /* gc_currently_forbidden = 0; */
|
|
|
4375 return unbind_to (speccount, tem);
|
|
|
4376 }
|
|
|
4377
|
|
|
4378 static Lisp_Object
|
|
|
4379 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4380 {
|
|
|
4381 /* This function can GC */
|
|
|
4382 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4383 }
|
|
|
4384
|
|
|
4385 static Lisp_Object
|
|
|
4386 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4387 {
|
|
|
4388 /* This function can GC */
|
|
|
4389 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4390 }
|
|
|
4391
|
|
|
4392 Lisp_Object
|
|
398
|
4393 call1_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
0
|
4394 Lisp_Object object)
|
|
|
4395 {
|
|
380
|
4396 int speccount = specpdl_depth();
|
|
0
|
4397 Lisp_Object tem;
|
|
|
4398 Lisp_Object cons = Qnil;
|
|
|
4399 Lisp_Object opaque = Qnil;
|
|
|
4400 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4401
|
|
|
4402 if (SYMBOLP (function))
|
|
|
4403 {
|
|
|
4404 tem = XSYMBOL (function)->function;
|
|
|
4405 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4406 return Qnil;
|
|
0
|
4407 }
|
|
|
4408
|
|
|
4409 GCPRO4 (cons, opaque, function, object);
|
|
|
4410
|
|
|
4411 specbind (Qinhibit_quit, Qt);
|
|
|
4412 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4413
|
|
|
4414 cons = noseeum_cons (function, object);
|
|
398
|
4415 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4416 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4417 tem = condition_case_1 (Qerror,
|
|
|
4418 catch_them_squirmers_call1, cons,
|
|
|
4419 caught_a_squirmer, opaque);
|
|
398
|
4420 if (OPAQUE_PTRP (opaque))
|
|
0
|
4421 free_opaque_ptr (opaque);
|
|
|
4422 free_cons (XCONS (cons));
|
|
|
4423 UNGCPRO;
|
|
185
|
4424
|
|
0
|
4425 /* gc_currently_forbidden = 0; */
|
|
|
4426 return unbind_to (speccount, tem);
|
|
|
4427 }
|
|
|
4428
|
|
|
4429 Lisp_Object
|
|
398
|
4430 call2_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
0
|
4431 Lisp_Object object1, Lisp_Object object2)
|
|
|
4432 {
|
|
380
|
4433 int speccount = specpdl_depth();
|
|
0
|
4434 Lisp_Object tem;
|
|
|
4435 Lisp_Object cons = Qnil;
|
|
|
4436 Lisp_Object opaque = Qnil;
|
|
|
4437 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4438
|
|
|
4439 if (SYMBOLP (function))
|
|
|
4440 {
|
|
|
4441 tem = XSYMBOL (function)->function;
|
|
|
4442 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4443 return Qnil;
|
|
0
|
4444 }
|
|
|
4445
|
|
|
4446 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4447 specbind (Qinhibit_quit, Qt);
|
|
|
4448 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4449
|
|
|
4450 cons = list3 (function, object1, object2);
|
|
398
|
4451 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4452 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4453 tem = condition_case_1 (Qerror,
|
|
|
4454 catch_them_squirmers_call2, cons,
|
|
|
4455 caught_a_squirmer, opaque);
|
|
398
|
4456 if (OPAQUE_PTRP (opaque))
|
|
0
|
4457 free_opaque_ptr (opaque);
|
|
|
4458 free_list (cons);
|
|
|
4459 UNGCPRO;
|
|
|
4460
|
|
|
4461 /* gc_currently_forbidden = 0; */
|
|
|
4462 return unbind_to (speccount, tem);
|
|
|
4463 }
|
|
|
4464
|
|
|
4465
|
|
380
|
4466 /************************************************************************/
|
|
|
4467 /* The special binding stack */
|
|
|
4468 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4469 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4470 /************************************************************************/
|
|
0
|
4471
|
|
2
|
4472 #define min_max_specpdl_size 400
|
|
|
4473
|
|
380
|
4474 void
|
|
|
4475 grow_specpdl (size_t reserved)
|
|
0
|
4476 {
|
|
380
|
4477 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4478 if (size_needed >= max_specpdl_size)
|
|
0
|
4479 {
|
|
2
|
4480 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4481 max_specpdl_size = min_max_specpdl_size;
|
|
380
|
4482 if (size_needed >= max_specpdl_size)
|
|
0
|
4483 {
|
|
380
|
4484 if (!NILP (Vdebug_on_error) ||
|
|
|
4485 !NILP (Vdebug_on_signal))
|
|
0
|
4486 /* Leave room for some specpdl in the debugger. */
|
|
380
|
4487 max_specpdl_size = size_needed + 100;
|
|
0
|
4488 continuable_error
|
|
|
4489 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4490 }
|
|
|
4491 }
|
|
380
|
4492 while (specpdl_size < size_needed)
|
|
|
4493 {
|
|
|
4494 specpdl_size *= 2;
|
|
|
4495 if (specpdl_size > max_specpdl_size)
|
|
|
4496 specpdl_size = max_specpdl_size;
|
|
|
4497 }
|
|
185
|
4498 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
380
|
4499 specpdl_ptr = specpdl + specpdl_depth();
|
|
0
|
4500 }
|
|
|
4501
|
|
|
4502
|
|
|
4503 /* Handle unbinding buffer-local variables */
|
|
|
4504 static Lisp_Object
|
|
|
4505 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4506 {
|
|
|
4507 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4508 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
398
|
4509 Lisp_Cons *victim = XCONS (ovalue);
|
|
0
|
4510 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4511 ovalue = victim->cdr;
|
|
|
4512
|
|
|
4513 free_cons (victim);
|
|
|
4514
|
|
|
4515 if (NILP (buf))
|
|
|
4516 {
|
|
|
4517 /* Deleted buffer -- do nothing */
|
|
|
4518 }
|
|
|
4519 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4520 {
|
|
|
4521 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4522 * (kill-local-variable can do this.)
|
|
|
4523 * Do nothing in this case.
|
|
|
4524 */
|
|
|
4525 }
|
|
|
4526 else if (EQ (buf, current))
|
|
|
4527 Fset (symbol, ovalue);
|
|
|
4528 else
|
|
|
4529 {
|
|
|
4530 /* Urk! Somebody switched buffers */
|
|
|
4531 struct gcpro gcpro1;
|
|
|
4532 GCPRO1 (current);
|
|
|
4533 Fset_buffer (buf);
|
|
|
4534 Fset (symbol, ovalue);
|
|
|
4535 Fset_buffer (current);
|
|
|
4536 UNGCPRO;
|
|
|
4537 }
|
|
173
|
4538 return symbol;
|
|
0
|
4539 }
|
|
|
4540
|
|
|
4541 static Lisp_Object
|
|
|
4542 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4543 {
|
|
|
4544 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4545 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4546
|
|
|
4547 buffer = get_buffer (buffer, 0);
|
|
|
4548 if (NILP (buffer))
|
|
|
4549 {
|
|
|
4550 /* Deleted buffer -- do nothing */
|
|
|
4551 }
|
|
|
4552 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4553 {
|
|
|
4554 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4555 * (kill-local-variable can do this.)
|
|
|
4556 * Do nothing in this case.
|
|
|
4557 */
|
|
|
4558 }
|
|
|
4559 else if (EQ (buffer, current))
|
|
|
4560 Fkill_local_variable (symbol);
|
|
|
4561 else
|
|
|
4562 {
|
|
|
4563 /* Urk! Somebody switched buffers */
|
|
|
4564 struct gcpro gcpro1;
|
|
|
4565 GCPRO1 (current);
|
|
|
4566 Fset_buffer (buffer);
|
|
|
4567 Fkill_local_variable (symbol);
|
|
|
4568 Fset_buffer (current);
|
|
|
4569 UNGCPRO;
|
|
|
4570 }
|
|
173
|
4571 return symbol;
|
|
0
|
4572 }
|
|
|
4573
|
|
|
4574
|
|
|
4575 void
|
|
|
4576 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4577 {
|
|
380
|
4578 SPECBIND (symbol, value);
|
|
|
4579 }
|
|
|
4580
|
|
|
4581 void
|
|
|
4582 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4583 {
|
|
|
4584 int buffer_local =
|
|
|
4585 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4586
|
|
0
|
4587 if (buffer_local == 0)
|
|
|
4588 {
|
|
|
4589 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4590 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4591 }
|
|
|
4592 else if (buffer_local > 0)
|
|
|
4593 {
|
|
|
4594 /* Already buffer-local */
|
|
|
4595 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4596 find_symbol_value (symbol));
|
|
|
4597 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4598 }
|
|
|
4599 else
|
|
|
4600 {
|
|
|
4601 /* About to become buffer-local */
|
|
|
4602 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4603 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4604 }
|
|
185
|
4605
|
|
0
|
4606 specpdl_ptr->symbol = symbol;
|
|
|
4607 specpdl_ptr++;
|
|
|
4608 specpdl_depth_counter++;
|
|
|
4609
|
|
|
4610 Fset (symbol, value);
|
|
|
4611 }
|
|
|
4612
|
|
|
4613 void
|
|
|
4614 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4615 Lisp_Object arg)
|
|
|
4616 {
|
|
380
|
4617 SPECPDL_RESERVE (1);
|
|
0
|
4618 specpdl_ptr->func = function;
|
|
|
4619 specpdl_ptr->symbol = Qnil;
|
|
|
4620 specpdl_ptr->old_value = arg;
|
|
|
4621 specpdl_ptr++;
|
|
|
4622 specpdl_depth_counter++;
|
|
|
4623 }
|
|
|
4624
|
|
|
4625 extern int check_sigio (void);
|
|
|
4626
|
|
380
|
4627 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4628 VALUE is not used, except that, purely as a convenience to the
|
|
|
4629 caller, it is protected from garbage-protection. */
|
|
0
|
4630 Lisp_Object
|
|
|
4631 unbind_to (int count, Lisp_Object value)
|
|
|
4632 {
|
|
380
|
4633 UNBIND_TO_GCPRO (count, value);
|
|
|
4634 return value;
|
|
|
4635 }
|
|
|
4636
|
|
|
4637 /* Don't call this directly.
|
|
|
4638 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4639 void
|
|
|
4640 unbind_to_hairy (int count)
|
|
|
4641 {
|
|
0
|
4642 int quitf;
|
|
|
4643
|
|
406
|
4644 ++specpdl_ptr;
|
|
|
4645 ++specpdl_depth_counter;
|
|
|
4646
|
|
0
|
4647 check_quit (); /* make Vquit_flag accurate */
|
|
|
4648 quitf = !NILP (Vquit_flag);
|
|
|
4649 Vquit_flag = Qnil;
|
|
|
4650
|
|
|
4651 while (specpdl_depth_counter != count)
|
|
|
4652 {
|
|
|
4653 --specpdl_ptr;
|
|
|
4654 --specpdl_depth_counter;
|
|
|
4655
|
|
|
4656 if (specpdl_ptr->func != 0)
|
|
|
4657 /* An unwind-protect */
|
|
380
|
4658 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
0
|
4659 else
|
|
380
|
4660 {
|
|
|
4661 /* We checked symbol for validity when we specbound it,
|
|
|
4662 so only need to call Fset if symbol has magic value. */
|
|
398
|
4663 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
380
|
4664 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4665 sym->value = specpdl_ptr->old_value;
|
|
|
4666 else
|
|
|
4667 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4668 }
|
|
|
4669
|
|
|
4670 #if 0 /* martin */
|
|
0
|
4671 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4672 /* There should never be anything here for us to remove.
|
|
|
4673 If so, it indicates a logic error in Emacs. Catches
|
|
|
4674 should get removed when a throw or signal occurs, or
|
|
|
4675 when a catch or condition-case exits normally. But
|
|
|
4676 it's too dangerous to just remove this code. --ben */
|
|
|
4677
|
|
|
4678 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4679 Braino on mly's part? */
|
|
|
4680 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4681 that catch can't possibly still be valid. */
|
|
|
4682 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4683 {
|
|
|
4684 catchlist = catchlist->next;
|
|
|
4685 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4686 }
|
|
|
4687 #endif
|
|
380
|
4688 #endif
|
|
0
|
4689 }
|
|
|
4690 if (quitf)
|
|
|
4691 Vquit_flag = Qt;
|
|
|
4692 }
|
|
|
4693
|
|
|
4694
|
|
|
4695
|
|
|
4696 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4697 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4698
|
|
|
4699 Lisp_Object
|
|
|
4700 top_level_value (Lisp_Object symbol)
|
|
|
4701 {
|
|
|
4702 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4703
|
|
|
4704 CHECK_SYMBOL (symbol);
|
|
|
4705 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4706 {
|
|
|
4707 if (EQ (ptr->symbol, symbol))
|
|
|
4708 return ptr->old_value;
|
|
|
4709 }
|
|
|
4710 return XSYMBOL (symbol)->value;
|
|
|
4711 }
|
|
|
4712
|
|
|
4713 #if 0
|
|
|
4714
|
|
|
4715 Lisp_Object
|
|
|
4716 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4717 {
|
|
|
4718 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4719
|
|
|
4720 CHECK_SYMBOL (symbol);
|
|
|
4721 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4722 {
|
|
|
4723 if (EQ (ptr->symbol, symbol))
|
|
|
4724 {
|
|
|
4725 ptr->old_value = newval;
|
|
|
4726 return newval;
|
|
|
4727 }
|
|
|
4728 }
|
|
|
4729 return Fset (symbol, newval);
|
|
185
|
4730 }
|
|
0
|
4731
|
|
|
4732 #endif /* 0 */
|
|
|
4733
|
|
|
4734
|
|
380
|
4735 /************************************************************************/
|
|
|
4736 /* Backtraces */
|
|
|
4737 /************************************************************************/
|
|
0
|
4738
|
|
20
|
4739 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4740 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4741 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4742 */
|
|
|
4743 (level, flag))
|
|
0
|
4744 {
|
|
|
4745 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4746 REGISTER int i;
|
|
|
4747
|
|
|
4748 CHECK_INT (level);
|
|
|
4749
|
|
|
4750 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4751 {
|
|
|
4752 backlist = backlist->next;
|
|
|
4753 }
|
|
|
4754
|
|
|
4755 if (backlist)
|
|
|
4756 backlist->debug_on_exit = !NILP (flag);
|
|
|
4757
|
|
|
4758 return flag;
|
|
|
4759 }
|
|
|
4760
|
|
|
4761 static void
|
|
|
4762 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4763 {
|
|
|
4764 int printing_bindings = 0;
|
|
|
4765
|
|
|
4766 for (; speccount > speclimit; speccount--)
|
|
|
4767 {
|
|
|
4768 if (specpdl[speccount - 1].func == 0
|
|
|
4769 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4770 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4771 {
|
|
|
4772 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4773 stream);
|
|
|
4774 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4775 printing_bindings = 1;
|
|
|
4776 }
|
|
|
4777 else
|
|
|
4778 {
|
|
|
4779 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4780 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4781 printing_bindings = 0;
|
|
|
4782 }
|
|
|
4783 }
|
|
|
4784 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4785 }
|
|
|
4786
|
|
20
|
4787 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4788 Print a trace of Lisp function calls currently active.
|
|
398
|
4789 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
0
|
4790 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4791 DETAILED means show places where currently active variable bindings,
|
|
|
4792 catches, condition-cases, and unwind-protects were made as well as
|
|
185
|
4793 function calls.
|
|
20
|
4794 */
|
|
|
4795 (stream, detailed))
|
|
0
|
4796 {
|
|
249
|
4797 /* This function can GC */
|
|
0
|
4798 struct backtrace *backlist = backtrace_list;
|
|
|
4799 struct catchtag *catches = catchlist;
|
|
380
|
4800 int speccount = specpdl_depth();
|
|
0
|
4801
|
|
|
4802 int old_nl = print_escape_newlines;
|
|
|
4803 int old_pr = print_readably;
|
|
|
4804 Lisp_Object old_level = Vprint_level;
|
|
|
4805 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4806 struct gcpro gcpro1, gcpro2;
|
|
|
4807
|
|
|
4808 /* We can't allow quits in here because that could cause the values
|
|
|
4809 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4810 Normally we would use a record_unwind_protect but that would
|
|
|
4811 screw up the functioning of this function. */
|
|
|
4812 Vinhibit_quit = Qt;
|
|
|
4813
|
|
|
4814 entering_debugger = 0;
|
|
|
4815
|
|
|
4816 Vprint_level = make_int (3);
|
|
|
4817 print_readably = 0;
|
|
|
4818 print_escape_newlines = 1;
|
|
|
4819
|
|
|
4820 GCPRO2 (stream, old_level);
|
|
|
4821
|
|
|
4822 if (NILP (stream))
|
|
|
4823 stream = Vstandard_output;
|
|
|
4824 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4825 stream = Fselected_frame (Qnil);
|
|
|
4826
|
|
|
4827 for (;;)
|
|
|
4828 {
|
|
|
4829 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4830 {
|
|
|
4831 int catchpdl = catches->pdlcount;
|
|
398
|
4832 if (speccount > catchpdl
|
|
|
4833 && specpdl[catchpdl].func == condition_case_unwind)
|
|
0
|
4834 /* This is a condition-case catchpoint */
|
|
|
4835 catchpdl = catchpdl + 1;
|
|
185
|
4836
|
|
0
|
4837 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4838
|
|
|
4839 speccount = catches->pdlcount;
|
|
|
4840 if (catchpdl == speccount)
|
|
|
4841 {
|
|
|
4842 write_c_string (" # (catch ", stream);
|
|
|
4843 Fprin1 (catches->tag, stream);
|
|
|
4844 write_c_string (" ...)\n", stream);
|
|
|
4845 }
|
|
|
4846 else
|
|
|
4847 {
|
|
|
4848 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4849 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4850 write_c_string (")\n", stream);
|
|
|
4851 }
|
|
|
4852 catches = catches->next;
|
|
|
4853 }
|
|
|
4854 else if (!backlist)
|
|
|
4855 break;
|
|
|
4856 else
|
|
|
4857 {
|
|
|
4858 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4859 {
|
|
|
4860 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4861 speccount = backlist->pdlcount;
|
|
|
4862 }
|
|
|
4863 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4864 stream);
|
|
|
4865 if (backlist->nargs == UNEVALLED)
|
|
|
4866 {
|
|
|
4867 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4868 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4869 }
|
|
|
4870 else
|
|
|
4871 {
|
|
|
4872 Lisp_Object tem = *backlist->function;
|
|
|
4873 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4874 write_c_string ("(", stream);
|
|
|
4875 if (backlist->nargs == MANY)
|
|
|
4876 {
|
|
|
4877 int i;
|
|
|
4878 Lisp_Object tail = Qnil;
|
|
|
4879 struct gcpro ngcpro1;
|
|
|
4880
|
|
|
4881 NGCPRO1 (tail);
|
|
|
4882 for (tail = *backlist->args, i = 0;
|
|
|
4883 !NILP (tail);
|
|
|
4884 tail = Fcdr (tail), i++)
|
|
|
4885 {
|
|
|
4886 if (i != 0) write_c_string (" ", stream);
|
|
|
4887 Fprin1 (Fcar (tail), stream);
|
|
|
4888 }
|
|
|
4889 NUNGCPRO;
|
|
|
4890 }
|
|
|
4891 else
|
|
|
4892 {
|
|
|
4893 int i;
|
|
|
4894 for (i = 0; i < backlist->nargs; i++)
|
|
|
4895 {
|
|
241
|
4896 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
4897 write_c_string("\"...\"", stream);
|
|
|
4898 continue;
|
|
|
4899 }
|
|
0
|
4900 if (i != 0) write_c_string (" ", stream);
|
|
|
4901 Fprin1 (backlist->args[i], stream);
|
|
|
4902 }
|
|
|
4903 }
|
|
|
4904 }
|
|
|
4905 write_c_string (")\n", stream);
|
|
|
4906 backlist = backlist->next;
|
|
|
4907 }
|
|
|
4908 }
|
|
|
4909 Vprint_level = old_level;
|
|
|
4910 print_readably = old_pr;
|
|
|
4911 print_escape_newlines = old_nl;
|
|
|
4912 UNGCPRO;
|
|
|
4913 Vinhibit_quit = oiq;
|
|
|
4914 return Qnil;
|
|
|
4915 }
|
|
|
4916
|
|
|
4917
|
|
20
|
4918 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
4919 Return the function and arguments N frames up from current execution point.
|
|
|
4920 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
4921 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
4922 If that frame has evaluated its arguments and called its function already,
|
|
|
4923 the value is (t FUNCTION ARG-VALUES...).
|
|
|
4924 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
4925 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
4926 or a lambda expression for macro calls.
|
|
|
4927 If N is more than the number of frames, the value is nil.
|
|
20
|
4928 */
|
|
|
4929 (nframes))
|
|
0
|
4930 {
|
|
|
4931 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4932 REGISTER int i;
|
|
|
4933 Lisp_Object tem;
|
|
|
4934
|
|
|
4935 CHECK_NATNUM (nframes);
|
|
|
4936
|
|
|
4937 /* Find the frame requested. */
|
|
|
4938 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
4939 backlist = backlist->next;
|
|
|
4940
|
|
|
4941 if (!backlist)
|
|
|
4942 return Qnil;
|
|
|
4943 if (backlist->nargs == UNEVALLED)
|
|
|
4944 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
4945 else
|
|
|
4946 {
|
|
|
4947 if (backlist->nargs == MANY)
|
|
|
4948 tem = *backlist->args;
|
|
|
4949 else
|
|
|
4950 tem = Flist (backlist->nargs, backlist->args);
|
|
|
4951
|
|
|
4952 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
4953 }
|
|
|
4954 }
|
|
|
4955
|
|
|
4956
|
|
380
|
4957 /************************************************************************/
|
|
|
4958 /* Warnings */
|
|
|
4959 /************************************************************************/
|
|
0
|
4960
|
|
|
4961 void
|
|
|
4962 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
4963 Lisp_Object obj)
|
|
|
4964 {
|
|
|
4965 obj = list1 (list3 (class, level, obj));
|
|
|
4966 if (NILP (Vpending_warnings))
|
|
|
4967 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
4968 else
|
|
|
4969 {
|
|
|
4970 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
4971 Vpending_warnings_tail = obj;
|
|
|
4972 }
|
|
|
4973 }
|
|
|
4974
|
|
|
4975 /* #### This should probably accept Lisp objects; but then we have
|
|
|
4976 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
4977
|
|
|
4978 An alternative approach is to just pass some non-string type of
|
|
380
|
4979 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
0
|
4980 automatically be called when it is safe to do so. */
|
|
|
4981
|
|
|
4982 void
|
|
398
|
4983 warn_when_safe (Lisp_Object class, Lisp_Object level, const char *fmt, ...)
|
|
0
|
4984 {
|
|
|
4985 Lisp_Object obj;
|
|
|
4986 va_list args;
|
|
|
4987
|
|
|
4988 va_start (args, fmt);
|
|
398
|
4989 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt),
|
|
0
|
4990 Qnil, -1, args);
|
|
|
4991 va_end (args);
|
|
|
4992
|
|
|
4993 warn_when_safe_lispobj (class, level, obj);
|
|
|
4994 }
|
|
|
4995
|
|
|
4996
|
|
|
4997
|
|
|
4998
|
|
380
|
4999 /************************************************************************/
|
|
|
5000 /* Initialization */
|
|
|
5001 /************************************************************************/
|
|
0
|
5002
|
|
|
5003 void
|
|
|
5004 syms_of_eval (void)
|
|
|
5005 {
|
|
400
|
5006 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
5007
|
|
0
|
5008 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5009 defsymbol (&Qautoload, "autoload");
|
|
|
5010 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5011 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5012 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5013 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5014 defsymbol (&Qdebugger, "debugger");
|
|
|
5015 defsymbol (&Qmacro, "macro");
|
|
|
5016 defsymbol (&Qand_rest, "&rest");
|
|
|
5017 defsymbol (&Qand_optional, "&optional");
|
|
|
5018 /* Note that the process code also uses Qexit */
|
|
|
5019 defsymbol (&Qexit, "exit");
|
|
|
5020 defsymbol (&Qsetq, "setq");
|
|
|
5021 defsymbol (&Qinteractive, "interactive");
|
|
|
5022 defsymbol (&Qcommandp, "commandp");
|
|
|
5023 defsymbol (&Qdefun, "defun");
|
|
|
5024 defsymbol (&Qprogn, "progn");
|
|
|
5025 defsymbol (&Qvalues, "values");
|
|
|
5026 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5027 defsymbol (&Qrun_hooks, "run-hooks");
|
|
380
|
5028 defsymbol (&Qif, "if");
|
|
0
|
5029
|
|
20
|
5030 DEFSUBR (For);
|
|
|
5031 DEFSUBR (Fand);
|
|
|
5032 DEFSUBR (Fif);
|
|
380
|
5033 DEFSUBR_MACRO (Fwhen);
|
|
|
5034 DEFSUBR_MACRO (Funless);
|
|
20
|
5035 DEFSUBR (Fcond);
|
|
|
5036 DEFSUBR (Fprogn);
|
|
|
5037 DEFSUBR (Fprog1);
|
|
|
5038 DEFSUBR (Fprog2);
|
|
|
5039 DEFSUBR (Fsetq);
|
|
|
5040 DEFSUBR (Fquote);
|
|
|
5041 DEFSUBR (Ffunction);
|
|
|
5042 DEFSUBR (Fdefun);
|
|
|
5043 DEFSUBR (Fdefmacro);
|
|
|
5044 DEFSUBR (Fdefvar);
|
|
|
5045 DEFSUBR (Fdefconst);
|
|
|
5046 DEFSUBR (Fuser_variable_p);
|
|
|
5047 DEFSUBR (Flet);
|
|
|
5048 DEFSUBR (FletX);
|
|
|
5049 DEFSUBR (Fwhile);
|
|
|
5050 DEFSUBR (Fmacroexpand_internal);
|
|
|
5051 DEFSUBR (Fcatch);
|
|
|
5052 DEFSUBR (Fthrow);
|
|
|
5053 DEFSUBR (Funwind_protect);
|
|
|
5054 DEFSUBR (Fcondition_case);
|
|
|
5055 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5056 DEFSUBR (Fsignal);
|
|
|
5057 DEFSUBR (Finteractive_p);
|
|
|
5058 DEFSUBR (Fcommandp);
|
|
|
5059 DEFSUBR (Fcommand_execute);
|
|
|
5060 DEFSUBR (Fautoload);
|
|
|
5061 DEFSUBR (Feval);
|
|
|
5062 DEFSUBR (Fapply);
|
|
|
5063 DEFSUBR (Ffuncall);
|
|
380
|
5064 DEFSUBR (Ffunctionp);
|
|
20
|
5065 DEFSUBR (Ffunction_min_args);
|
|
|
5066 DEFSUBR (Ffunction_max_args);
|
|
|
5067 DEFSUBR (Frun_hooks);
|
|
|
5068 DEFSUBR (Frun_hook_with_args);
|
|
|
5069 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5070 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5071 DEFSUBR (Fbacktrace_debug);
|
|
|
5072 DEFSUBR (Fbacktrace);
|
|
|
5073 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5074 }
|
|
|
5075
|
|
|
5076 void
|
|
|
5077 reinit_eval (void)
|
|
|
5078 {
|
|
|
5079 specpdl_ptr = specpdl;
|
|
|
5080 specpdl_depth_counter = 0;
|
|
|
5081 catchlist = 0;
|
|
|
5082 Vcondition_handlers = Qnil;
|
|
|
5083 backtrace_list = 0;
|
|
|
5084 Vquit_flag = Qnil;
|
|
|
5085 debug_on_next_call = 0;
|
|
|
5086 lisp_eval_depth = 0;
|
|
|
5087 entering_debugger = 0;
|
|
|
5088 }
|
|
|
5089
|
|
|
5090 void
|
|
398
|
5091 reinit_vars_of_eval (void)
|
|
|
5092 {
|
|
|
5093 preparing_for_armageddon = 0;
|
|
|
5094 in_warnings = 0;
|
|
|
5095 Qunbound_suspended_errors_tag = make_opaque_ptr (&Qunbound_suspended_errors_tag);
|
|
|
5096 staticpro_nodump (&Qunbound_suspended_errors_tag);
|
|
|
5097
|
|
|
5098 specpdl_size = 50;
|
|
|
5099 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
5100 /* XEmacs change: increase these values. */
|
|
|
5101 max_specpdl_size = 3000;
|
|
|
5102 max_lisp_eval_depth = 500;
|
|
404
|
5103 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
398
|
5104 throw_level = 0;
|
|
|
5105 #endif
|
|
|
5106 }
|
|
|
5107
|
|
|
5108 void
|
|
0
|
5109 vars_of_eval (void)
|
|
|
5110 {
|
|
398
|
5111 reinit_vars_of_eval ();
|
|
|
5112
|
|
0
|
5113 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5114 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5115 */ );
|
|
|
5116
|
|
|
5117 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5118 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5119 This limit is to catch infinite recursions for you before they cause
|
|
|
5120 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5121 You can safely make it considerably larger than its default value,
|
|
|
5122 if that proves inconveniently small.
|
|
|
5123 */ );
|
|
|
5124
|
|
|
5125 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5126 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5127 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5128 */ );
|
|
|
5129 Vquit_flag = Qnil;
|
|
|
5130
|
|
|
5131 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5132 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5133 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5134 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5135 To prevent this happening, set `quit-flag' to nil
|
|
|
5136 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5137 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5138 an X frame.
|
|
|
5139 */ );
|
|
|
5140 Vinhibit_quit = Qnil;
|
|
|
5141
|
|
|
5142 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5143 *Non-nil means automatically display a backtrace buffer
|
|
|
5144 after any error that is not handled by a `condition-case'.
|
|
|
5145 If the value is a list, an error only means to display a backtrace
|
|
|
5146 if one of its condition symbols appears in the list.
|
|
|
5147 See also variable `stack-trace-on-signal'.
|
|
|
5148 */ );
|
|
|
5149 Vstack_trace_on_error = Qnil;
|
|
|
5150
|
|
|
5151 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5152 *Non-nil means automatically display a backtrace buffer
|
|
|
5153 after any error that is signalled, whether or not it is handled by
|
|
|
5154 a `condition-case'.
|
|
|
5155 If the value is a list, an error only means to display a backtrace
|
|
|
5156 if one of its condition symbols appears in the list.
|
|
|
5157 See also variable `stack-trace-on-error'.
|
|
|
5158 */ );
|
|
|
5159 Vstack_trace_on_signal = Qnil;
|
|
|
5160
|
|
163
|
5161 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5162 *List of errors for which the debugger should not be called.
|
|
|
5163 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5164 If any element applies to a given error, that error skips the debugger
|
|
|
5165 and just returns to top level.
|
|
|
5166 This overrides the variable `debug-on-error'.
|
|
|
5167 It does not apply to errors handled by `condition-case'.
|
|
|
5168 */ );
|
|
|
5169 Vdebug_ignored_errors = Qnil;
|
|
|
5170
|
|
0
|
5171 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5172 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5173 The debugger will not be entered if the error is handled by
|
|
|
5174 a `condition-case'.
|
|
|
5175 If the value is a list, an error only means to enter the debugger
|
|
|
5176 if one of its condition symbols appears in the list.
|
|
181
|
5177 This variable is overridden by `debug-ignored-errors'.
|
|
0
|
5178 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5179 */ );
|
|
|
5180 Vdebug_on_error = Qnil;
|
|
|
5181
|
|
|
5182 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5183 *Non-nil means enter debugger if an error is signalled.
|
|
|
5184 The debugger will be entered whether or not the error is handled by
|
|
|
5185 a `condition-case'.
|
|
|
5186 If the value is a list, an error only means to enter the debugger
|
|
|
5187 if one of its condition symbols appears in the list.
|
|
|
5188 See also variable `debug-on-quit'.
|
|
|
5189 */ );
|
|
|
5190 Vdebug_on_signal = Qnil;
|
|
|
5191
|
|
|
5192 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5193 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5194 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5195 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5196 control-shift-G to signal a critical quit.
|
|
|
5197 */ );
|
|
|
5198 debug_on_quit = 0;
|
|
|
5199
|
|
|
5200 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5201 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5202 */ );
|
|
|
5203
|
|
|
5204 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5205 Function to call to invoke debugger.
|
|
|
5206 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5207 this function's value will be returned instead of that.
|
|
|
5208 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5209 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5210 If due to `eval' entry, one arg, t.
|
|
|
5211 */ );
|
|
|
5212 Vdebugger = Qnil;
|
|
|
5213
|
|
|
5214 staticpro (&Vpending_warnings);
|
|
|
5215 Vpending_warnings = Qnil;
|
|
398
|
5216 pdump_wire (&Vpending_warnings_tail);
|
|
|
5217 Vpending_warnings_tail = Qnil;
|
|
0
|
5218
|
|
|
5219 staticpro (&Vautoload_queue);
|
|
|
5220 Vautoload_queue = Qnil;
|
|
|
5221
|
|
|
5222 staticpro (&Vcondition_handlers);
|
|
|
5223
|
|
|
5224 staticpro (&Vcurrent_warning_class);
|
|
|
5225 Vcurrent_warning_class = Qnil;
|
|
|
5226
|
|
|
5227 staticpro (&Vcurrent_error_state);
|
|
|
5228 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5229
|
|
|
5230 reinit_eval ();
|
|
|
5231 }
|
