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428
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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563
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4 Copyright (C) 2000, 2001 Ben Wing.
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428
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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24
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25 #include <config.h>
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26 #include "lisp.h"
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27
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28 #include "commands.h"
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29 #include "backtrace.h"
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30 #include "bytecode.h"
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31 #include "buffer.h"
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32 #include "console.h"
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33 #include "opaque.h"
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34
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35 #ifdef ERROR_CHECK_GC
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36 int always_gc; /* Debugging hack */
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37 #else
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38 #define always_gc 0
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39 #endif
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40
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41 struct backtrace *backtrace_list;
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42
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43 /* Note: you must always fill in all of the fields in a backtrace structure
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44 before pushing them on the backtrace_list. The profiling code depends
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45 on this. */
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46
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47 #define PUSH_BACKTRACE(bt) do { \
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48 (bt).next = backtrace_list; \
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49 backtrace_list = &(bt); \
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50 } while (0)
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51
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52 #define POP_BACKTRACE(bt) do { \
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53 backtrace_list = (bt).next; \
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54 } while (0)
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55
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56 /* Macros for calling subrs with an argument list whose length is only
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57 known at runtime. See EXFUN and DEFUN for similar hackery. */
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58
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59 #define AV_0(av)
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60 #define AV_1(av) av[0]
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61 #define AV_2(av) AV_1(av), av[1]
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62 #define AV_3(av) AV_2(av), av[2]
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63 #define AV_4(av) AV_3(av), av[3]
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64 #define AV_5(av) AV_4(av), av[4]
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65 #define AV_6(av) AV_5(av), av[5]
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66 #define AV_7(av) AV_6(av), av[6]
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67 #define AV_8(av) AV_7(av), av[7]
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68
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69 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
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444
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70 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
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428
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71
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72 /* If subrs take more than 8 arguments, more cases need to be added
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73 to this switch. (But wait - don't do it - if you really need
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74 a SUBR with more than 8 arguments, use max_args == MANY.
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75 See the DEFUN macro in lisp.h) */
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76 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
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77 void (*PF_fn)(void) = (void (*)(void)) fn; \
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78 Lisp_Object *PF_av = (av); \
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79 switch (ac) \
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80 { \
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436
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81 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
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428
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82 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
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83 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
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84 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
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85 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
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86 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
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87 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
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88 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
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89 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
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90 } \
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91 } while (0)
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92
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93 #define FUNCALL_SUBR(rv, subr, av, ac) \
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94 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
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95
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96
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97 /* This is the list of current catches (and also condition-cases).
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98 This is a stack: the most recent catch is at the head of the
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99 list. Catches are created by declaring a 'struct catchtag'
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100 locally, filling the .TAG field in with the tag, and doing
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101 a setjmp() on .JMP. Fthrow() will store the value passed
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102 to it in .VAL and longjmp() back to .JMP, back to the function
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103 that established the catch. This will always be either
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104 internal_catch() (catches established internally or through
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105 `catch') or condition_case_1 (condition-cases established
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106 internally or through `condition-case').
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107
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108 The catchtag also records the current position in the
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109 call stack (stored in BACKTRACE_LIST), the current position
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110 in the specpdl stack (used for variable bindings and
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111 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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112 current position in the GCPRO stack. All of these are
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113 restored by Fthrow().
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114 */
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115
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116 struct catchtag *catchlist;
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117
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118 Lisp_Object Qautoload, Qmacro, Qexit;
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119 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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120 Lisp_Object Vquit_flag, Vinhibit_quit;
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121 Lisp_Object Qand_rest, Qand_optional;
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122 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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123 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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124 Lisp_Object Qdebugger;
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125 Lisp_Object Qinhibit_quit;
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126 Lisp_Object Qrun_hooks;
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127 Lisp_Object Qsetq;
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128 Lisp_Object Qdisplay_warning;
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129 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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130 Lisp_Object Qif;
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131
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132 /* Records whether we want errors to occur. This will be a boolean,
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133 nil (errors OK) or t (no errors). If t, an error will cause a
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134 throw to Qunbound_suspended_errors_tag.
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135
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136 See call_with_suspended_errors(). */
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137 Lisp_Object Vcurrent_error_state;
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138
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139 /* Current warning class when warnings occur, or nil for no warnings.
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140 Only meaningful when Vcurrent_error_state is non-nil.
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141 See call_with_suspended_errors(). */
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142 Lisp_Object Vcurrent_warning_class;
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143
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144 /* Special catch tag used in call_with_suspended_errors(). */
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145 Lisp_Object Qunbound_suspended_errors_tag;
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146
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147 /* Non-nil means record all fset's and provide's, to be undone
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148 if the file being autoloaded is not fully loaded.
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149 They are recorded by being consed onto the front of Vautoload_queue:
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150 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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151 Lisp_Object Vautoload_queue;
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152
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153 /* Current number of specbindings allocated in specpdl. */
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154 int specpdl_size;
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155
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156 /* Pointer to beginning of specpdl. */
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157 struct specbinding *specpdl;
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158
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159 /* Pointer to first unused element in specpdl. */
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160 struct specbinding *specpdl_ptr;
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161
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162 /* specpdl_ptr - specpdl */
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163 int specpdl_depth_counter;
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164
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165 /* Maximum size allowed for specpdl allocation */
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458
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166 Fixnum max_specpdl_size;
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428
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167
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168 /* Depth in Lisp evaluations and function calls. */
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169 static int lisp_eval_depth;
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170
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171 /* Maximum allowed depth in Lisp evaluations and function calls. */
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458
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172 Fixnum max_lisp_eval_depth;
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428
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173
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174 /* Nonzero means enter debugger before next function call */
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175 static int debug_on_next_call;
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176
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177 /* List of conditions (non-nil atom means all) which cause a backtrace
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178 if an error is handled by the command loop's error handler. */
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179 Lisp_Object Vstack_trace_on_error;
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180
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181 /* List of conditions (non-nil atom means all) which enter the debugger
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182 if an error is handled by the command loop's error handler. */
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183 Lisp_Object Vdebug_on_error;
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184
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185 /* List of conditions and regexps specifying error messages which
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186 do not enter the debugger even if Vdebug_on_error says they should. */
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187 Lisp_Object Vdebug_ignored_errors;
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188
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189 /* List of conditions (non-nil atom means all) which cause a backtrace
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190 if any error is signalled. */
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191 Lisp_Object Vstack_trace_on_signal;
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192
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193 /* List of conditions (non-nil atom means all) which enter the debugger
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194 if any error is signalled. */
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195 Lisp_Object Vdebug_on_signal;
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196
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197 /* Nonzero means enter debugger if a quit signal
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198 is handled by the command loop's error handler.
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199
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200 From lisp, this is a boolean variable and may have the values 0 and 1.
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201 But, eval.c temporarily uses the second bit of this variable to indicate
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202 that a critical_quit is in progress. The second bit is reset immediately
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203 after it is processed in signal_call_debugger(). */
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204 int debug_on_quit;
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205
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206 #if 0 /* FSFmacs */
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207 /* entering_debugger is basically equivalent */
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208 /* The value of num_nonmacro_input_chars as of the last time we
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209 started to enter the debugger. If we decide to enter the debugger
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210 again when this is still equal to num_nonmacro_input_chars, then we
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211 know that the debugger itself has an error, and we should just
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212 signal the error instead of entering an infinite loop of debugger
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213 invocations. */
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214 int when_entered_debugger;
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215 #endif
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216
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217 /* Nonzero means we are trying to enter the debugger.
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218 This is to prevent recursive attempts.
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219 Cleared by the debugger calling Fbacktrace */
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220 static int entering_debugger;
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221
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222 /* Function to call to invoke the debugger */
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223 Lisp_Object Vdebugger;
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224
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225 /* Chain of condition handlers currently in effect.
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226 The elements of this chain are contained in the stack frames
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227 of Fcondition_case and internal_condition_case.
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228 When an error is signaled (by calling Fsignal, below),
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229 this chain is searched for an element that applies.
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230
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231 Each element of this list is one of the following:
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232
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233 A list of a handler function and possibly args to pass to
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234 the function. This is a handler established with
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235 `call-with-condition-handler' (q.v.).
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236
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237 A list whose car is Qunbound and whose cdr is Qt.
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238 This is a special condition-case handler established
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239 by C code with condition_case_1(). All errors are
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240 trapped; the debugger is not invoked even if
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241 `debug-on-error' was set.
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242
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243 A list whose car is Qunbound and whose cdr is Qerror.
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244 This is a special condition-case handler established
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245 by C code with condition_case_1(). It is like Qt
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246 except that the debugger is invoked normally if it is
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247 called for.
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248
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249 A list whose car is Qunbound and whose cdr is a list
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250 of lists (CONDITION-NAME BODY ...) exactly as in
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251 `condition-case'. This is a normal `condition-case'
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252 handler.
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253
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254 Note that in all cases *except* the first, there is a
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255 corresponding catch, whose TAG is the value of
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256 Vcondition_handlers just after the handler data just
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257 described is pushed onto it. The reason is that
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258 `condition-case' handlers need to throw back to the
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259 place where the handler was installed before invoking
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260 it, while `call-with-condition-handler' handlers are
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261 invoked in the environment that `signal' was invoked
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262 in.
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263 */
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264 static Lisp_Object Vcondition_handlers;
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265
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266
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442
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267 #define DEFEND_AGAINST_THROW_RECURSION
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268
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269 #ifdef DEFEND_AGAINST_THROW_RECURSION
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428
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270 /* Used for error catching purposes by throw_or_bomb_out */
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271 static int throw_level;
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442
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272 #endif
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273
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274 #ifdef ERROR_CHECK_TYPECHECK
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275 void check_error_state_sanity (void);
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276 #endif
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428
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277
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278
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279 /************************************************************************/
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280 /* The subr object type */
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281 /************************************************************************/
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282
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283 static void
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284 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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285 {
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286 Lisp_Subr *subr = XSUBR (obj);
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442
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287 const char *header =
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428
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288 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
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442
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289 const char *name = subr_name (subr);
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290 const char *trailer = subr->prompt ? " (interactive)>" : ">";
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428
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291
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292 if (print_readably)
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563
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293 printing_unreadable_object ("%s%s%s", header, name, trailer);
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428
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294
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295 write_c_string (header, printcharfun);
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296 write_c_string (name, printcharfun);
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297 write_c_string (trailer, printcharfun);
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298 }
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299
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300 static const struct lrecord_description subr_description[] = {
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440
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301 { XD_DOC_STRING, offsetof (Lisp_Subr, doc) },
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428
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302 { XD_END }
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303 };
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304
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305 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
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442
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306 0, print_subr, 0, 0, 0,
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428
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307 subr_description,
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308 Lisp_Subr);
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309
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310 /************************************************************************/
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311 /* Entering the debugger */
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312 /************************************************************************/
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313
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314 /* unwind-protect used by call_debugger() to restore the value of
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315 entering_debugger. (We cannot use specbind() because the
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316 variable is not Lisp-accessible.) */
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317
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318 static Lisp_Object
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319 restore_entering_debugger (Lisp_Object arg)
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320 {
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321 entering_debugger = ! NILP (arg);
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322 return arg;
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323 }
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324
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325 /* Actually call the debugger. ARG is a list of args that will be
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326 passed to the debugger function, as follows;
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327
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328 If due to frame exit, args are `exit' and the value being returned;
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329 this function's value will be returned instead of that.
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330 If due to error, args are `error' and a list of the args to `signal'.
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331 If due to `apply' or `funcall' entry, one arg, `lambda'.
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332 If due to `eval' entry, one arg, t.
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333
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334 */
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335
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336 static Lisp_Object
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337 call_debugger_259 (Lisp_Object arg)
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338 {
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339 return apply1 (Vdebugger, arg);
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340 }
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341
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342 /* Call the debugger, doing some encapsulation. We make sure we have
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343 some room on the eval and specpdl stacks, and bind entering_debugger
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344 to 1 during this call. This is used to trap errors that may occur
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345 when entering the debugger (e.g. the value of `debugger' is invalid),
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346 so that the debugger will not be recursively entered if debug-on-error
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347 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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348 enter the debugger.) entering_debugger gets reset to 0 as soon
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349 as a backtrace is displayed, so that further errors can indeed be
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350 handled normally.
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351
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352 We also establish a catch for 'debugger. If the debugger function
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353 throws to this instead of returning a value, it means that the user
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354 pressed 'c' (pretend like the debugger was never entered). The
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355 function then returns Qunbound. (If the user pressed 'r', for
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356 return a value, then the debugger function returns normally with
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357 this value.)
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358
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359 The difference between 'c' and 'r' is as follows:
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360
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361 debug-on-call:
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362 No difference. The call proceeds as normal.
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363 debug-on-exit:
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364 With 'r', the specified value is returned as the function's
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365 return value. With 'c', the value that would normally be
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366 returned is returned.
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367 signal:
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368 With 'r', the specified value is returned as the return
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369 value of `signal'. (This is the only time that `signal'
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370 can return, instead of making a non-local exit.) With `c',
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371 `signal' will continue looking for handlers as if the
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372 debugger was never entered, and will probably end up
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373 throwing to a handler or to top-level.
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374 */
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375
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|
|
376 static Lisp_Object
|
|
|
377 call_debugger (Lisp_Object arg)
|
|
|
378 {
|
|
|
379 int threw;
|
|
|
380 Lisp_Object val;
|
|
|
381 int speccount;
|
|
|
382
|
|
|
383 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
384 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
385 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
386 max_specpdl_size = specpdl_size + 40;
|
|
|
387 debug_on_next_call = 0;
|
|
|
388
|
|
|
389 speccount = specpdl_depth();
|
|
|
390 record_unwind_protect (restore_entering_debugger,
|
|
|
391 (entering_debugger ? Qt : Qnil));
|
|
|
392 entering_debugger = 1;
|
|
|
393 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
394
|
|
|
395 return unbind_to (speccount, ((threw)
|
|
|
396 ? Qunbound /* Not returning a value */
|
|
|
397 : val));
|
|
|
398 }
|
|
|
399
|
|
|
400 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
401 with the appropriate args for this. VAL is the exit value that is
|
|
|
402 about to be returned. */
|
|
|
403
|
|
|
404 static Lisp_Object
|
|
|
405 do_debug_on_exit (Lisp_Object val)
|
|
|
406 {
|
|
|
407 /* This is falsified by call_debugger */
|
|
|
408 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
|
409
|
|
|
410 return !UNBOUNDP (v) ? v : val;
|
|
|
411 }
|
|
|
412
|
|
|
413 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
414 with the appropriate args for this. VAL is either t for a call
|
|
|
415 through `eval' or 'lambda for a call through `funcall'.
|
|
|
416
|
|
|
417 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
418 FUNCALL can be defined as
|
|
|
419
|
|
|
420 (defmacro func (fun &rest args)
|
|
|
421 (cons (eval fun) args))
|
|
|
422
|
|
|
423 and should be treated as such.
|
|
|
424 */
|
|
|
425
|
|
|
426 static void
|
|
|
427 do_debug_on_call (Lisp_Object code)
|
|
|
428 {
|
|
|
429 debug_on_next_call = 0;
|
|
|
430 backtrace_list->debug_on_exit = 1;
|
|
|
431 call_debugger (list1 (code));
|
|
|
432 }
|
|
|
433
|
|
|
434 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
435 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
436 and CONDITIONS is the list of error conditions associated with
|
|
|
437 the error being signalled. This returns non-nil if LIST
|
|
|
438 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
439 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
440 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
441 same as one of the symbols in CONDITIONS.) */
|
|
|
442
|
|
|
443 static int
|
|
|
444 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
445 {
|
|
|
446 if (NILP (list))
|
|
|
447 return 0;
|
|
|
448 if (! CONSP (list))
|
|
|
449 return 1;
|
|
|
450
|
|
|
451 while (CONSP (conditions))
|
|
|
452 {
|
|
|
453 Lisp_Object this, tail;
|
|
|
454 this = XCAR (conditions);
|
|
|
455 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
456 if (EQ (XCAR (tail), this))
|
|
|
457 return 1;
|
|
|
458 conditions = XCDR (conditions);
|
|
|
459 }
|
|
|
460 return 0;
|
|
|
461 }
|
|
|
462
|
|
|
463
|
|
|
464 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
465 and described by SIGNAL-DATA, should skip the debugger
|
|
|
466 according to debugger-ignore-errors. */
|
|
|
467
|
|
|
468 static int
|
|
|
469 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
470 {
|
|
|
471 /* This function can GC */
|
|
|
472 Lisp_Object tail;
|
|
|
473 int first_string = 1;
|
|
|
474 Lisp_Object error_message = Qnil;
|
|
|
475
|
|
|
476 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
477 {
|
|
|
478 if (STRINGP (XCAR (tail)))
|
|
|
479 {
|
|
|
480 if (first_string)
|
|
|
481 {
|
|
|
482 error_message = Ferror_message_string (data);
|
|
|
483 first_string = 0;
|
|
|
484 }
|
|
|
485 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
486 return 1;
|
|
|
487 }
|
|
|
488 else
|
|
|
489 {
|
|
|
490 Lisp_Object contail;
|
|
|
491
|
|
|
492 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
493 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
494 return 1;
|
|
|
495 }
|
|
|
496 }
|
|
|
497
|
|
|
498 return 0;
|
|
|
499 }
|
|
|
500
|
|
|
501 /* Actually generate a backtrace on STREAM. */
|
|
|
502
|
|
|
503 static Lisp_Object
|
|
|
504 backtrace_259 (Lisp_Object stream)
|
|
|
505 {
|
|
|
506 return Fbacktrace (stream, Qt);
|
|
|
507 }
|
|
|
508
|
|
|
509 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
|
510 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
511 associated with the error being signalled. SIG is the actual error
|
|
|
512 being signalled, and DATA is the associated data (these are exactly
|
|
|
513 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
514 list of error handlers that are to be put in place while the debugger
|
|
|
515 is called. This is generally the remaining handlers that are
|
|
|
516 outside of the innermost handler trapping this error. This way,
|
|
|
517 if the same error occurs inside of the debugger, you usually don't get
|
|
|
518 the debugger entered recursively.
|
|
|
519
|
|
|
520 This function returns Qunbound if it didn't call the debugger or if
|
|
|
521 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
522 debugger was never entered. Otherwise, it returns the value
|
|
|
523 that the user specified with `r'. (Note that much of the time,
|
|
|
524 the user will abort with C-], and we will never have a chance to
|
|
|
525 return anything at all.)
|
|
|
526
|
|
|
527 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
528 and stack-trace-on-signal to control whether we do anything.
|
|
|
529 This is so that debug-on-error doesn't make handled errors
|
|
|
530 cause the debugger to get invoked.
|
|
|
531
|
|
|
532 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
533 those functions aren't done more than once in a single `signal'
|
|
|
534 session. */
|
|
|
535
|
|
|
536 static Lisp_Object
|
|
|
537 signal_call_debugger (Lisp_Object conditions,
|
|
|
538 Lisp_Object sig, Lisp_Object data,
|
|
|
539 Lisp_Object active_handlers,
|
|
|
540 int signal_vars_only,
|
|
|
541 int *stack_trace_displayed,
|
|
|
542 int *debugger_entered)
|
|
|
543 {
|
|
|
544 /* This function can GC */
|
|
|
545 Lisp_Object val = Qunbound;
|
|
|
546 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
547 Lisp_Object temp_data = Qnil;
|
|
|
548 int speccount = specpdl_depth();
|
|
|
549 struct gcpro gcpro1, gcpro2;
|
|
|
550 GCPRO2 (all_handlers, temp_data);
|
|
|
551
|
|
|
552 Vcondition_handlers = active_handlers;
|
|
|
553
|
|
|
554 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
|
555
|
|
|
556 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
557 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
558 && !skip_debugger (conditions, temp_data))
|
|
|
559 {
|
|
|
560 specbind (Qdebug_on_error, Qnil);
|
|
|
561 specbind (Qstack_trace_on_error, Qnil);
|
|
|
562 specbind (Qdebug_on_signal, Qnil);
|
|
|
563 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
564
|
|
442
|
565 if (!noninteractive)
|
|
|
566 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
567 backtrace_259,
|
|
|
568 Qnil,
|
|
|
569 Qnil);
|
|
|
570 else /* in batch mode, we want this going to stderr. */
|
|
|
571 backtrace_259 (Qnil);
|
|
428
|
572 unbind_to (speccount, Qnil);
|
|
|
573 *stack_trace_displayed = 1;
|
|
|
574 }
|
|
|
575
|
|
|
576 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
577 && (EQ (sig, Qquit)
|
|
|
578 ? debug_on_quit
|
|
|
579 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
580 && !skip_debugger (conditions, temp_data))
|
|
|
581 {
|
|
|
582 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
583 specbind (Qdebug_on_error, Qnil);
|
|
|
584 specbind (Qstack_trace_on_error, Qnil);
|
|
|
585 specbind (Qdebug_on_signal, Qnil);
|
|
|
586 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
587
|
|
|
588 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
589 *debugger_entered = 1;
|
|
|
590 }
|
|
|
591
|
|
|
592 if (!entering_debugger && !*stack_trace_displayed
|
|
|
593 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
594 {
|
|
|
595 specbind (Qdebug_on_error, Qnil);
|
|
|
596 specbind (Qstack_trace_on_error, Qnil);
|
|
|
597 specbind (Qdebug_on_signal, Qnil);
|
|
|
598 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
599
|
|
442
|
600 if (!noninteractive)
|
|
|
601 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
|
602 backtrace_259,
|
|
|
603 Qnil,
|
|
|
604 Qnil);
|
|
|
605 else /* in batch mode, we want this going to stderr. */
|
|
|
606 backtrace_259 (Qnil);
|
|
428
|
607 unbind_to (speccount, Qnil);
|
|
|
608 *stack_trace_displayed = 1;
|
|
|
609 }
|
|
|
610
|
|
|
611 if (!entering_debugger && !*debugger_entered
|
|
|
612 && (EQ (sig, Qquit)
|
|
|
613 ? debug_on_quit
|
|
|
614 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
615 {
|
|
|
616 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
617 specbind (Qdebug_on_error, Qnil);
|
|
|
618 specbind (Qstack_trace_on_error, Qnil);
|
|
|
619 specbind (Qdebug_on_signal, Qnil);
|
|
|
620 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
621
|
|
|
622 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
623 *debugger_entered = 1;
|
|
|
624 }
|
|
|
625
|
|
|
626 UNGCPRO;
|
|
|
627 Vcondition_handlers = all_handlers;
|
|
|
628 return unbind_to (speccount, val);
|
|
|
629 }
|
|
|
630
|
|
|
631
|
|
|
632 /************************************************************************/
|
|
|
633 /* The basic special forms */
|
|
|
634 /************************************************************************/
|
|
|
635
|
|
|
636 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
637 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
|
638
|
|
|
639 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
|
640 Eval args until one of them yields non-nil, then return that value.
|
|
|
641 The remaining args are not evalled at all.
|
|
|
642 If all args return nil, return nil.
|
|
|
643 */
|
|
|
644 (args))
|
|
|
645 {
|
|
|
646 /* This function can GC */
|
|
442
|
647 REGISTER Lisp_Object val;
|
|
428
|
648
|
|
|
649 LIST_LOOP_2 (arg, args)
|
|
|
650 {
|
|
|
651 if (!NILP (val = Feval (arg)))
|
|
|
652 return val;
|
|
|
653 }
|
|
|
654
|
|
|
655 return Qnil;
|
|
|
656 }
|
|
|
657
|
|
|
658 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
|
659 Eval args until one of them yields nil, then return nil.
|
|
|
660 The remaining args are not evalled at all.
|
|
|
661 If no arg yields nil, return the last arg's value.
|
|
|
662 */
|
|
|
663 (args))
|
|
|
664 {
|
|
|
665 /* This function can GC */
|
|
442
|
666 REGISTER Lisp_Object val = Qt;
|
|
428
|
667
|
|
|
668 LIST_LOOP_2 (arg, args)
|
|
|
669 {
|
|
|
670 if (NILP (val = Feval (arg)))
|
|
|
671 return val;
|
|
|
672 }
|
|
|
673
|
|
|
674 return val;
|
|
|
675 }
|
|
|
676
|
|
|
677 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
|
678 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
679 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
680 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
681 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
|
682 */
|
|
|
683 (args))
|
|
|
684 {
|
|
|
685 /* This function can GC */
|
|
|
686 Lisp_Object condition = XCAR (args);
|
|
|
687 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
688 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
689
|
|
|
690 if (!NILP (Feval (condition)))
|
|
|
691 return Feval (then_form);
|
|
|
692 else
|
|
|
693 return Fprogn (else_forms);
|
|
|
694 }
|
|
|
695
|
|
|
696 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
697 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
698
|
|
|
699 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
700 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
701 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
702 */
|
|
|
703 (int nargs, Lisp_Object *args))
|
|
|
704 {
|
|
|
705 Lisp_Object cond = args[0];
|
|
|
706 Lisp_Object body;
|
|
|
707
|
|
|
708 switch (nargs)
|
|
|
709 {
|
|
|
710 case 1: body = Qnil; break;
|
|
|
711 case 2: body = args[1]; break;
|
|
|
712 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
713 }
|
|
|
714
|
|
|
715 return list3 (Qif, cond, body);
|
|
|
716 }
|
|
|
717
|
|
|
718 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
719 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
720 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
721 */
|
|
|
722 (int nargs, Lisp_Object *args))
|
|
|
723 {
|
|
|
724 Lisp_Object cond = args[0];
|
|
|
725 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
726 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
|
727 }
|
|
|
728
|
|
|
729 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
444
|
730 \(cond CLAUSES...): try each clause until one succeeds.
|
|
428
|
731 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
732 and, if the value is non-nil, this clause succeeds:
|
|
|
733 then the expressions in BODY are evaluated and the last one's
|
|
|
734 value is the value of the cond-form.
|
|
|
735 If no clause succeeds, cond returns nil.
|
|
|
736 If a clause has one element, as in (CONDITION),
|
|
|
737 CONDITION's value if non-nil is returned from the cond-form.
|
|
|
738 */
|
|
|
739 (args))
|
|
|
740 {
|
|
|
741 /* This function can GC */
|
|
442
|
742 REGISTER Lisp_Object val;
|
|
428
|
743
|
|
|
744 LIST_LOOP_2 (clause, args)
|
|
|
745 {
|
|
|
746 CHECK_CONS (clause);
|
|
|
747 if (!NILP (val = Feval (XCAR (clause))))
|
|
|
748 {
|
|
|
749 if (!NILP (clause = XCDR (clause)))
|
|
|
750 {
|
|
|
751 CHECK_TRUE_LIST (clause);
|
|
|
752 val = Fprogn (clause);
|
|
|
753 }
|
|
|
754 return val;
|
|
|
755 }
|
|
|
756 }
|
|
|
757
|
|
|
758 return Qnil;
|
|
|
759 }
|
|
|
760
|
|
|
761 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
|
762 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
|
763 */
|
|
|
764 (args))
|
|
|
765 {
|
|
|
766 /* This function can GC */
|
|
|
767 /* Caller must provide a true list in ARGS */
|
|
442
|
768 REGISTER Lisp_Object val = Qnil;
|
|
428
|
769 struct gcpro gcpro1;
|
|
|
770
|
|
|
771 GCPRO1 (args);
|
|
|
772
|
|
|
773 {
|
|
|
774 LIST_LOOP_2 (form, args)
|
|
|
775 val = Feval (form);
|
|
|
776 }
|
|
|
777
|
|
|
778 UNGCPRO;
|
|
|
779 return val;
|
|
|
780 }
|
|
|
781
|
|
|
782 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
783 Lisp_Object across calls to Feval(). */
|
|
|
784
|
|
|
785 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
|
786 Similar to `progn', but the value of the first form is returned.
|
|
|
787 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
788 The value of FIRST is saved during evaluation of the remaining args,
|
|
|
789 whose values are discarded.
|
|
|
790 */
|
|
|
791 (args))
|
|
|
792 {
|
|
|
793 /* This function can GC */
|
|
442
|
794 REGISTER Lisp_Object val;
|
|
428
|
795 struct gcpro gcpro1;
|
|
|
796
|
|
|
797 val = Feval (XCAR (args));
|
|
|
798
|
|
|
799 GCPRO1 (val);
|
|
|
800
|
|
|
801 {
|
|
|
802 LIST_LOOP_2 (form, XCDR (args))
|
|
|
803 Feval (form);
|
|
|
804 }
|
|
|
805
|
|
|
806 UNGCPRO;
|
|
|
807 return val;
|
|
|
808 }
|
|
|
809
|
|
|
810 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
|
811 Similar to `progn', but the value of the second form is returned.
|
|
|
812 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
813 The value of SECOND is saved during evaluation of the remaining args,
|
|
|
814 whose values are discarded.
|
|
|
815 */
|
|
|
816 (args))
|
|
|
817 {
|
|
|
818 /* This function can GC */
|
|
442
|
819 REGISTER Lisp_Object val;
|
|
428
|
820 struct gcpro gcpro1;
|
|
|
821
|
|
|
822 Feval (XCAR (args));
|
|
|
823 args = XCDR (args);
|
|
|
824 val = Feval (XCAR (args));
|
|
|
825 args = XCDR (args);
|
|
|
826
|
|
|
827 GCPRO1 (val);
|
|
|
828
|
|
442
|
829 {
|
|
|
830 LIST_LOOP_2 (form, args)
|
|
|
831 Feval (form);
|
|
|
832 }
|
|
428
|
833
|
|
|
834 UNGCPRO;
|
|
|
835 return val;
|
|
|
836 }
|
|
|
837
|
|
|
838 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
|
839 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
840 The value of the last form in BODY is returned.
|
|
|
841 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
842 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
843 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
|
844 */
|
|
|
845 (args))
|
|
|
846 {
|
|
|
847 /* This function can GC */
|
|
|
848 Lisp_Object varlist = XCAR (args);
|
|
|
849 Lisp_Object body = XCDR (args);
|
|
|
850 int speccount = specpdl_depth();
|
|
|
851
|
|
|
852 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
|
853 {
|
|
|
854 Lisp_Object symbol, value, tem;
|
|
|
855 if (SYMBOLP (var))
|
|
|
856 symbol = var, value = Qnil;
|
|
|
857 else
|
|
|
858 {
|
|
|
859 CHECK_CONS (var);
|
|
|
860 symbol = XCAR (var);
|
|
|
861 tem = XCDR (var);
|
|
|
862 if (NILP (tem))
|
|
|
863 value = Qnil;
|
|
|
864 else
|
|
|
865 {
|
|
|
866 CHECK_CONS (tem);
|
|
|
867 value = Feval (XCAR (tem));
|
|
|
868 if (!NILP (XCDR (tem)))
|
|
563
|
869 sferror
|
|
428
|
870 ("`let' bindings can have only one value-form", var);
|
|
|
871 }
|
|
|
872 }
|
|
|
873 specbind (symbol, value);
|
|
|
874 }
|
|
|
875 return unbind_to (speccount, Fprogn (body));
|
|
|
876 }
|
|
|
877
|
|
|
878 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
|
879 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
880 The value of the last form in BODY is returned.
|
|
|
881 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
882 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
883 All the VALUEFORMs are evalled before any symbols are bound.
|
|
|
884 */
|
|
|
885 (args))
|
|
|
886 {
|
|
|
887 /* This function can GC */
|
|
|
888 Lisp_Object varlist = XCAR (args);
|
|
|
889 Lisp_Object body = XCDR (args);
|
|
|
890 int speccount = specpdl_depth();
|
|
|
891 Lisp_Object *temps;
|
|
|
892 int idx;
|
|
|
893 struct gcpro gcpro1;
|
|
|
894
|
|
|
895 /* Make space to hold the values to give the bound variables. */
|
|
|
896 {
|
|
|
897 int varcount;
|
|
|
898 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
|
899 temps = alloca_array (Lisp_Object, varcount);
|
|
|
900 }
|
|
|
901
|
|
|
902 /* Compute the values and store them in `temps' */
|
|
|
903 GCPRO1 (*temps);
|
|
|
904 gcpro1.nvars = 0;
|
|
|
905
|
|
|
906 idx = 0;
|
|
442
|
907 {
|
|
|
908 LIST_LOOP_2 (var, varlist)
|
|
|
909 {
|
|
|
910 Lisp_Object *value = &temps[idx++];
|
|
|
911 if (SYMBOLP (var))
|
|
|
912 *value = Qnil;
|
|
|
913 else
|
|
|
914 {
|
|
|
915 Lisp_Object tem;
|
|
|
916 CHECK_CONS (var);
|
|
|
917 tem = XCDR (var);
|
|
|
918 if (NILP (tem))
|
|
|
919 *value = Qnil;
|
|
|
920 else
|
|
|
921 {
|
|
|
922 CHECK_CONS (tem);
|
|
|
923 *value = Feval (XCAR (tem));
|
|
|
924 gcpro1.nvars = idx;
|
|
|
925
|
|
|
926 if (!NILP (XCDR (tem)))
|
|
563
|
927 sferror
|
|
442
|
928 ("`let' bindings can have only one value-form", var);
|
|
|
929 }
|
|
|
930 }
|
|
|
931 }
|
|
|
932 }
|
|
428
|
933
|
|
|
934 idx = 0;
|
|
442
|
935 {
|
|
|
936 LIST_LOOP_2 (var, varlist)
|
|
|
937 {
|
|
|
938 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
|
939 }
|
|
|
940 }
|
|
428
|
941
|
|
|
942 UNGCPRO;
|
|
|
943
|
|
|
944 return unbind_to (speccount, Fprogn (body));
|
|
|
945 }
|
|
|
946
|
|
|
947 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
|
948 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
949 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
950 until TEST returns nil.
|
|
|
951 */
|
|
|
952 (args))
|
|
|
953 {
|
|
|
954 /* This function can GC */
|
|
|
955 Lisp_Object test = XCAR (args);
|
|
|
956 Lisp_Object body = XCDR (args);
|
|
|
957
|
|
|
958 while (!NILP (Feval (test)))
|
|
|
959 {
|
|
|
960 QUIT;
|
|
|
961 Fprogn (body);
|
|
|
962 }
|
|
|
963
|
|
|
964 return Qnil;
|
|
|
965 }
|
|
|
966
|
|
|
967 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
|
968 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
969 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
970 The values VAL are expressions; they are evaluated.
|
|
|
971 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
972 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
973 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
974 The return value of the `setq' form is the value of the last VAL.
|
|
|
975 */
|
|
|
976 (args))
|
|
|
977 {
|
|
|
978 /* This function can GC */
|
|
|
979 Lisp_Object symbol, tail, val = Qnil;
|
|
|
980 int nargs;
|
|
|
981 struct gcpro gcpro1;
|
|
|
982
|
|
|
983 GET_LIST_LENGTH (args, nargs);
|
|
|
984
|
|
|
985 if (nargs & 1) /* Odd number of arguments? */
|
|
|
986 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
987
|
|
|
988 GCPRO1 (val);
|
|
|
989
|
|
|
990 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
|
991 {
|
|
|
992 val = Feval (val);
|
|
|
993 Fset (symbol, val);
|
|
|
994 }
|
|
|
995
|
|
|
996 UNGCPRO;
|
|
|
997 return val;
|
|
|
998 }
|
|
|
999
|
|
|
1000 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
|
1001 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
|
1002 */
|
|
|
1003 (args))
|
|
|
1004 {
|
|
|
1005 return XCAR (args);
|
|
|
1006 }
|
|
|
1007
|
|
|
1008 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
|
1009 Like `quote', but preferred for objects which are functions.
|
|
|
1010 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1011 `quote' cannot do that.
|
|
|
1012 */
|
|
|
1013 (args))
|
|
|
1014 {
|
|
|
1015 return XCAR (args);
|
|
|
1016 }
|
|
|
1017
|
|
|
1018
|
|
|
1019 /************************************************************************/
|
|
|
1020 /* Defining functions/variables */
|
|
|
1021 /************************************************************************/
|
|
|
1022 static Lisp_Object
|
|
|
1023 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1024 {
|
|
|
1025 Ffset (name, defn);
|
|
|
1026 LOADHIST_ATTACH (name);
|
|
|
1027 return name;
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
|
1031 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1032 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1033 See also the function `interactive'.
|
|
|
1034 */
|
|
|
1035 (args))
|
|
|
1036 {
|
|
|
1037 /* This function can GC */
|
|
|
1038 return define_function (XCAR (args),
|
|
|
1039 Fcons (Qlambda, XCDR (args)));
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
|
1043 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1044 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1045 When the macro is called, as in (NAME ARGS...),
|
|
|
1046 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1047 the list ARGS... as it appears in the expression,
|
|
|
1048 and the result should be a form to be evaluated instead of the original.
|
|
|
1049 */
|
|
|
1050 (args))
|
|
|
1051 {
|
|
|
1052 /* This function can GC */
|
|
|
1053 return define_function (XCAR (args),
|
|
|
1054 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
|
1055 }
|
|
|
1056
|
|
|
1057 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
|
1058 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1059 You are not required to define a variable in order to use it,
|
|
|
1060 but the definition can supply documentation and an initial value
|
|
|
1061 in a way that tags can recognize.
|
|
|
1062
|
|
|
1063 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1064 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1065 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1066 void.)
|
|
|
1067 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1068 buffer-local values are not affected.
|
|
|
1069 INITVALUE and DOCSTRING are optional.
|
|
|
1070 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1071 This means that M-x set-variable recognizes it.
|
|
428
|
1072 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1073
|
|
|
1074 In lisp-interaction-mode defvar is treated as defconst.
|
|
|
1075 */
|
|
|
1076 (args))
|
|
|
1077 {
|
|
|
1078 /* This function can GC */
|
|
|
1079 Lisp_Object sym = XCAR (args);
|
|
|
1080
|
|
|
1081 if (!NILP (args = XCDR (args)))
|
|
|
1082 {
|
|
|
1083 Lisp_Object val = XCAR (args);
|
|
|
1084
|
|
|
1085 if (NILP (Fdefault_boundp (sym)))
|
|
|
1086 {
|
|
|
1087 struct gcpro gcpro1;
|
|
|
1088 GCPRO1 (val);
|
|
|
1089 val = Feval (val);
|
|
|
1090 Fset_default (sym, val);
|
|
|
1091 UNGCPRO;
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 if (!NILP (args = XCDR (args)))
|
|
|
1095 {
|
|
|
1096 Lisp_Object doc = XCAR (args);
|
|
|
1097 Fput (sym, Qvariable_documentation, doc);
|
|
|
1098 if (!NILP (args = XCDR (args)))
|
|
563
|
1099 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1100 }
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 #ifdef I18N3
|
|
|
1104 if (!NILP (Vfile_domain))
|
|
|
1105 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1106 #endif
|
|
|
1107
|
|
|
1108 LOADHIST_ATTACH (sym);
|
|
|
1109 return sym;
|
|
|
1110 }
|
|
|
1111
|
|
|
1112 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
|
1113 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1114 variable.
|
|
|
1115 The intent is that programs do not change this value, but users may.
|
|
|
1116 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1117 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1118 buffer-local values are not affected.
|
|
|
1119 DOCSTRING is optional.
|
|
|
1120 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
442
|
1121 This means that M-x set-variable recognizes it.
|
|
428
|
1122
|
|
|
1123 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1124 normally loaded, since it is useful for users to be able to specify
|
|
|
1125 their own values for such variables before loading the library.
|
|
|
1126 Since `defconst' unconditionally assigns the variable,
|
|
|
1127 it would override the user's choice.
|
|
|
1128 */
|
|
|
1129 (args))
|
|
|
1130 {
|
|
|
1131 /* This function can GC */
|
|
|
1132 Lisp_Object sym = XCAR (args);
|
|
|
1133 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1134 struct gcpro gcpro1;
|
|
|
1135
|
|
|
1136 GCPRO1 (val);
|
|
|
1137
|
|
|
1138 Fset_default (sym, val);
|
|
|
1139
|
|
|
1140 UNGCPRO;
|
|
|
1141
|
|
|
1142 if (!NILP (args = XCDR (args)))
|
|
|
1143 {
|
|
|
1144 Lisp_Object doc = XCAR (args);
|
|
|
1145 Fput (sym, Qvariable_documentation, doc);
|
|
|
1146 if (!NILP (args = XCDR (args)))
|
|
563
|
1147 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound);
|
|
428
|
1148 }
|
|
|
1149
|
|
|
1150 #ifdef I18N3
|
|
|
1151 if (!NILP (Vfile_domain))
|
|
|
1152 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
|
1153 #endif
|
|
|
1154
|
|
|
1155 LOADHIST_ATTACH (sym);
|
|
|
1156 return sym;
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
|
1160 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1161 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1162 Determined by whether the first character of the documentation
|
|
|
1163 for the variable is `*'.
|
|
|
1164 */
|
|
|
1165 (variable))
|
|
|
1166 {
|
|
|
1167 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1168
|
|
|
1169 return
|
|
|
1170 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1171
|
|
|
1172 (STRINGP (documentation) &&
|
|
|
1173 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1174
|
|
|
1175 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1176 (CONSP (documentation)
|
|
|
1177 && STRINGP (XCAR (documentation))
|
|
|
1178 && INTP (XCDR (documentation))
|
|
|
1179 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1180 Qt : Qnil;
|
|
|
1181 }
|
|
|
1182
|
|
|
1183 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
|
1184 Return result of expanding macros at top level of FORM.
|
|
|
1185 If FORM is not a macro call, it is returned unchanged.
|
|
|
1186 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1187 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1188
|
|
442
|
1189 The second optional arg ENVIRONMENT specifies an environment of macro
|
|
428
|
1190 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
|
1191 */
|
|
442
|
1192 (form, environment))
|
|
428
|
1193 {
|
|
|
1194 /* This function can GC */
|
|
|
1195 /* With cleanups from Hallvard Furuseth. */
|
|
|
1196 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1197
|
|
|
1198 while (1)
|
|
|
1199 {
|
|
|
1200 /* Come back here each time we expand a macro call,
|
|
|
1201 in case it expands into another macro call. */
|
|
|
1202 if (!CONSP (form))
|
|
|
1203 break;
|
|
|
1204 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1205 def = sym = XCAR (form);
|
|
|
1206 tem = Qnil;
|
|
|
1207 /* Trace symbols aliases to other symbols
|
|
|
1208 until we get a symbol that is not an alias. */
|
|
|
1209 while (SYMBOLP (def))
|
|
|
1210 {
|
|
|
1211 QUIT;
|
|
|
1212 sym = def;
|
|
442
|
1213 tem = Fassq (sym, environment);
|
|
428
|
1214 if (NILP (tem))
|
|
|
1215 {
|
|
|
1216 def = XSYMBOL (sym)->function;
|
|
|
1217 if (!UNBOUNDP (def))
|
|
|
1218 continue;
|
|
|
1219 }
|
|
|
1220 break;
|
|
|
1221 }
|
|
442
|
1222 /* Right now TEM is the result from SYM in ENVIRONMENT,
|
|
428
|
1223 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1224 if (NILP (tem))
|
|
|
1225 {
|
|
442
|
1226 /* SYM is not mentioned in ENVIRONMENT.
|
|
428
|
1227 Look at its function definition. */
|
|
|
1228 if (UNBOUNDP (def)
|
|
|
1229 || !CONSP (def))
|
|
|
1230 /* Not defined or definition not suitable */
|
|
|
1231 break;
|
|
|
1232 if (EQ (XCAR (def), Qautoload))
|
|
|
1233 {
|
|
|
1234 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1235 tem = Felt (def, make_int (4));
|
|
|
1236 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1237 {
|
|
|
1238 /* Yes, load it and try again. */
|
|
|
1239 do_autoload (def, sym);
|
|
|
1240 continue;
|
|
|
1241 }
|
|
|
1242 else
|
|
|
1243 break;
|
|
|
1244 }
|
|
|
1245 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1246 break;
|
|
|
1247 else expander = XCDR (def);
|
|
|
1248 }
|
|
|
1249 else
|
|
|
1250 {
|
|
|
1251 expander = XCDR (tem);
|
|
|
1252 if (NILP (expander))
|
|
|
1253 break;
|
|
|
1254 }
|
|
|
1255 form = apply1 (expander, XCDR (form));
|
|
|
1256 }
|
|
|
1257 return form;
|
|
|
1258 }
|
|
|
1259
|
|
|
1260
|
|
|
1261 /************************************************************************/
|
|
|
1262 /* Non-local exits */
|
|
|
1263 /************************************************************************/
|
|
|
1264
|
|
|
1265 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
|
1266 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1267 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1268 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1269 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1270 If a throw happens, it specifies the value to return from `catch'.
|
|
|
1271 */
|
|
|
1272 (args))
|
|
|
1273 {
|
|
|
1274 /* This function can GC */
|
|
|
1275 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1276 Lisp_Object body = XCDR (args);
|
|
|
1277 return internal_catch (tag, Fprogn, body, 0);
|
|
|
1278 }
|
|
|
1279
|
|
|
1280 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1281 FUNC should return a Lisp_Object.
|
|
|
1282 This is how catches are done from within C code. */
|
|
|
1283
|
|
|
1284 Lisp_Object
|
|
|
1285 internal_catch (Lisp_Object tag,
|
|
|
1286 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1287 Lisp_Object arg,
|
|
|
1288 int * volatile threw)
|
|
|
1289 {
|
|
|
1290 /* This structure is made part of the chain `catchlist'. */
|
|
|
1291 struct catchtag c;
|
|
|
1292
|
|
|
1293 /* Fill in the components of c, and put it on the list. */
|
|
|
1294 c.next = catchlist;
|
|
|
1295 c.tag = tag;
|
|
|
1296 c.val = Qnil;
|
|
|
1297 c.backlist = backtrace_list;
|
|
|
1298 #if 0 /* FSFmacs */
|
|
|
1299 /* #### */
|
|
|
1300 c.handlerlist = handlerlist;
|
|
|
1301 #endif
|
|
|
1302 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1303 c.pdlcount = specpdl_depth();
|
|
|
1304 #if 0 /* FSFmacs */
|
|
|
1305 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1306 #endif
|
|
|
1307 c.gcpro = gcprolist;
|
|
|
1308 catchlist = &c;
|
|
|
1309
|
|
|
1310 /* Call FUNC. */
|
|
|
1311 if (SETJMP (c.jmp))
|
|
|
1312 {
|
|
|
1313 /* Throw works by a longjmp that comes right here. */
|
|
|
1314 if (threw) *threw = 1;
|
|
|
1315 return c.val;
|
|
|
1316 }
|
|
|
1317 c.val = (*func) (arg);
|
|
|
1318 if (threw) *threw = 0;
|
|
|
1319 catchlist = c.next;
|
|
442
|
1320 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1321 check_error_state_sanity ();
|
|
|
1322 #endif
|
|
428
|
1323 return c.val;
|
|
|
1324 }
|
|
|
1325
|
|
|
1326
|
|
|
1327 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1328 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1329
|
|
|
1330 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1331 they choose the catch tag to throw to. A catch tag for a
|
|
|
1332 condition-case form has a TAG of Qnil.
|
|
|
1333
|
|
|
1334 Before each catch is discarded, unbind all special bindings and
|
|
|
1335 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1336 the handler stack as we go, so that the proper handlers are in
|
|
|
1337 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1338 some static info saved in CATCH, and longjmp to the location
|
|
|
1339 specified in the
|
|
|
1340
|
|
|
1341 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1342
|
|
|
1343 static void
|
|
|
1344 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1345 {
|
|
|
1346 #if 0 /* FSFmacs */
|
|
|
1347 /* #### */
|
|
|
1348 REGISTER int last_time;
|
|
|
1349 #endif
|
|
|
1350
|
|
|
1351 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1352 Before each catch is discarded, unbind all special bindings
|
|
|
1353 and execute all unwind-protect clauses made above that catch.
|
|
|
1354 At the end, restore some static info saved in CATCH,
|
|
|
1355 and longjmp to the location specified.
|
|
|
1356 */
|
|
|
1357
|
|
|
1358 /* Save the value somewhere it will be GC'ed.
|
|
|
1359 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1360 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1361 c->val = val;
|
|
|
1362
|
|
|
1363 #if 0 /* FSFmacs */
|
|
|
1364 /* Restore the polling-suppression count. */
|
|
|
1365 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1366 #endif
|
|
|
1367
|
|
|
1368 #if 0 /* FSFmacs */
|
|
|
1369 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1370 do
|
|
|
1371 {
|
|
|
1372 last_time = catchlist == c;
|
|
|
1373
|
|
|
1374 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1375 handlers. */
|
|
|
1376 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1377 handlerlist = catchlist->handlerlist;
|
|
|
1378 catchlist = catchlist->next;
|
|
442
|
1379 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1380 check_error_state_sanity ();
|
|
|
1381 #endif
|
|
428
|
1382 }
|
|
|
1383 while (! last_time);
|
|
|
1384 #else /* Actual XEmacs code */
|
|
|
1385 /* Unwind the specpdl stack */
|
|
|
1386 unbind_to (c->pdlcount, Qnil);
|
|
|
1387 catchlist = c->next;
|
|
442
|
1388 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1389 check_error_state_sanity ();
|
|
|
1390 #endif
|
|
428
|
1391 #endif
|
|
|
1392
|
|
|
1393 gcprolist = c->gcpro;
|
|
|
1394 backtrace_list = c->backlist;
|
|
|
1395 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1396
|
|
442
|
1397 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1398 throw_level = 0;
|
|
|
1399 #endif
|
|
|
1400 LONGJMP (c->jmp, 1);
|
|
|
1401 }
|
|
|
1402
|
|
|
1403 static DOESNT_RETURN
|
|
|
1404 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1405 Lisp_Object sig, Lisp_Object data)
|
|
|
1406 {
|
|
442
|
1407 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
1408 /* die if we recurse more than is reasonable */
|
|
|
1409 if (++throw_level > 20)
|
|
|
1410 abort();
|
|
|
1411 #endif
|
|
|
1412
|
|
|
1413 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1414 "last resort" when there is no handler for this error and
|
|
|
1415 the debugger couldn't be invoked, so we are throwing to
|
|
|
1416 'top-level. If this tag doesn't exist (happens during the
|
|
|
1417 initialization stages) we would get in an infinite recursive
|
|
|
1418 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1419 really-early-error-handler.
|
|
|
1420
|
|
|
1421 Note that in fact the only time that the "last resort"
|
|
|
1422 occurs is when there's no catch for 'top-level -- the
|
|
|
1423 'top-level catch and the catch-all error handler are
|
|
|
1424 established at the same time, in initial_command_loop/
|
|
|
1425 top_level_1.
|
|
|
1426
|
|
|
1427 #### Fix this horrifitude!
|
|
|
1428 */
|
|
|
1429
|
|
|
1430 while (1)
|
|
|
1431 {
|
|
|
1432 REGISTER struct catchtag *c;
|
|
|
1433
|
|
|
1434 #if 0 /* FSFmacs */
|
|
|
1435 if (!NILP (tag)) /* #### */
|
|
|
1436 #endif
|
|
|
1437 for (c = catchlist; c; c = c->next)
|
|
|
1438 {
|
|
|
1439 if (EQ (c->tag, tag))
|
|
|
1440 unwind_to_catch (c, val);
|
|
|
1441 }
|
|
|
1442 if (!bomb_out_p)
|
|
|
1443 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1444 else
|
|
|
1445 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1446 }
|
|
|
1447
|
|
|
1448 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1449 /* throw_level--; */
|
|
|
1450 /* getting tired of compilation warnings */
|
|
|
1451 /* return Qnil; */
|
|
|
1452 }
|
|
|
1453
|
|
|
1454 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1455 Fthrow() works.
|
|
|
1456
|
|
|
1457 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1458 back to the appropriate condition-case handler after (maybe)
|
|
|
1459 the debugger is entered. In that case, TAG is the value
|
|
|
1460 of Vcondition_handlers that was in place just after the
|
|
|
1461 condition-case handler was set up. The car of this will be
|
|
|
1462 some data referring to the handler: Its car will be Qunbound
|
|
|
1463 (thus, this tag can never be generated by Lisp code), and
|
|
|
1464 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1465 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1466 This works fine because Fthrow() does not care what TAG was
|
|
|
1467 passed to it: it just looks up the catch list for something
|
|
|
1468 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1469 back to the place that established the catch (in this case,
|
|
|
1470 condition_case_1). See below for more info.
|
|
|
1471 */
|
|
|
1472
|
|
|
1473 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
444
|
1474 Throw to the catch for TAG and return VALUE from it.
|
|
428
|
1475 Both TAG and VALUE are evalled.
|
|
|
1476 */
|
|
444
|
1477 (tag, value))
|
|
|
1478 {
|
|
|
1479 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */
|
|
428
|
1480 return Qnil;
|
|
|
1481 }
|
|
|
1482
|
|
|
1483 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
|
1484 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1485 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1486 If BODYFORM completes normally, its value is returned
|
|
|
1487 after executing the UNWINDFORMS.
|
|
|
1488 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
|
1489 */
|
|
|
1490 (args))
|
|
|
1491 {
|
|
|
1492 /* This function can GC */
|
|
|
1493 int speccount = specpdl_depth();
|
|
|
1494
|
|
|
1495 record_unwind_protect (Fprogn, XCDR (args));
|
|
|
1496 return unbind_to (speccount, Feval (XCAR (args)));
|
|
|
1497 }
|
|
|
1498
|
|
|
1499
|
|
|
1500 /************************************************************************/
|
|
|
1501 /* Signalling and trapping errors */
|
|
|
1502 /************************************************************************/
|
|
|
1503
|
|
|
1504 static Lisp_Object
|
|
|
1505 condition_bind_unwind (Lisp_Object loser)
|
|
|
1506 {
|
|
440
|
1507 Lisp_Cons *victim;
|
|
428
|
1508 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1509 Lisp_Object tem = XCAR (loser);
|
|
|
1510
|
|
|
1511 while (CONSP (tem))
|
|
|
1512 {
|
|
|
1513 victim = XCONS (tem);
|
|
|
1514 tem = victim->cdr;
|
|
|
1515 free_cons (victim);
|
|
|
1516 }
|
|
|
1517 victim = XCONS (loser);
|
|
|
1518
|
|
|
1519 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1520 Vcondition_handlers = victim->cdr;
|
|
|
1521
|
|
|
1522 free_cons (victim);
|
|
|
1523 return Qnil;
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 static Lisp_Object
|
|
|
1527 condition_case_unwind (Lisp_Object loser)
|
|
|
1528 {
|
|
440
|
1529 Lisp_Cons *victim;
|
|
428
|
1530
|
|
|
1531 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1532 victim = XCONS (XCAR (loser));
|
|
|
1533 free_cons (victim);
|
|
|
1534
|
|
|
1535 victim = XCONS (loser);
|
|
|
1536 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1537 Vcondition_handlers = victim->cdr;
|
|
|
1538
|
|
|
1539 free_cons (victim);
|
|
|
1540 return Qnil;
|
|
|
1541 }
|
|
|
1542
|
|
|
1543 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1544 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1545
|
|
|
1546 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1547 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1548 HANDLERS as something to be caught, the return value of this
|
|
|
1549 function is the return value from BFUN. If such an error does
|
|
|
1550 occur, HFUN is called, and its return value becomes the
|
|
|
1551 return value of condition_case_1(). The second argument passed
|
|
|
1552 to HFUN will always be HARG. The first argument depends on
|
|
|
1553 HANDLERS:
|
|
|
1554
|
|
|
1555 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1556 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1557 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1558 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1559 `debug-on-error' was set.
|
|
|
1560
|
|
|
1561 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1562 debugger is invoked if `debug-on-error' was set.
|
|
|
1563
|
|
|
1564 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1565 exactly as in `condition-case', and errors will be trapped
|
|
|
1566 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1567 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1568 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1569
|
|
|
1570 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1571 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1572 for why), establishes a catch whose tag is this new value of
|
|
|
1573 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1574 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1575 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1576 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1577 jump point we just established, and we in turn just call the
|
|
|
1578 HFUN and return its value.
|
|
|
1579
|
|
|
1580 For a real condition-case, HFUN will always be
|
|
|
1581 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1582 to condition-case. That function just binds VAR to the cons
|
|
|
1583 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1584 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1585 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1586 it had *before* condition_case_1() was called. This maintains
|
|
|
1587 consistency (so that the state of things at exit of
|
|
|
1588 condition_case_1() is the same as at entry), and implies
|
|
|
1589 that the handler can signal the same error again (possibly
|
|
|
1590 after processing of its own), without getting in an infinite
|
|
|
1591 loop. */
|
|
|
1592
|
|
|
1593 Lisp_Object
|
|
|
1594 condition_case_1 (Lisp_Object handlers,
|
|
|
1595 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1596 Lisp_Object barg,
|
|
|
1597 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1598 Lisp_Object harg)
|
|
|
1599 {
|
|
|
1600 int speccount = specpdl_depth();
|
|
|
1601 struct catchtag c;
|
|
|
1602 struct gcpro gcpro1;
|
|
|
1603
|
|
|
1604 #if 0 /* FSFmacs */
|
|
|
1605 c.tag = Qnil;
|
|
|
1606 #else
|
|
|
1607 /* Do consing now so out-of-memory error happens up front */
|
|
|
1608 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1609 which is known specially by Fsignal.
|
|
|
1610 This is an abomination, but to fix it would require either
|
|
|
1611 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1612 or changing the byte-compiler output (no thanks). */
|
|
|
1613 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1614 Vcondition_handlers);
|
|
|
1615 #endif
|
|
|
1616 c.val = Qnil;
|
|
|
1617 c.backlist = backtrace_list;
|
|
|
1618 #if 0 /* FSFmacs */
|
|
|
1619 /* #### */
|
|
|
1620 c.handlerlist = handlerlist;
|
|
|
1621 #endif
|
|
|
1622 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1623 c.pdlcount = specpdl_depth();
|
|
|
1624 #if 0 /* FSFmacs */
|
|
|
1625 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1626 #endif
|
|
|
1627 c.gcpro = gcprolist;
|
|
|
1628 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1629 c.next = catchlist;
|
|
|
1630
|
|
|
1631 if (SETJMP (c.jmp))
|
|
|
1632 {
|
|
|
1633 /* throw does ungcpro, etc */
|
|
|
1634 return (*hfun) (c.val, harg);
|
|
|
1635 }
|
|
|
1636
|
|
|
1637 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1638
|
|
|
1639 catchlist = &c;
|
|
|
1640 #if 0 /* FSFmacs */
|
|
|
1641 h.handler = handlers;
|
|
|
1642 h.var = Qnil;
|
|
|
1643 h.next = handlerlist;
|
|
|
1644 h.tag = &c;
|
|
|
1645 handlerlist = &h;
|
|
|
1646 #else
|
|
|
1647 Vcondition_handlers = c.tag;
|
|
|
1648 #endif
|
|
|
1649 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1650
|
|
|
1651 c.val = ((*bfun) (barg));
|
|
|
1652
|
|
|
1653 /* The following is *not* true: (ben)
|
|
|
1654
|
|
|
1655 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1656 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1657 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1658 UNGCPRO;
|
|
|
1659 catchlist = c.next;
|
|
442
|
1660 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1661 check_error_state_sanity ();
|
|
|
1662 #endif
|
|
428
|
1663 Vcondition_handlers = XCDR (c.tag);
|
|
|
1664
|
|
|
1665 return unbind_to (speccount, c.val);
|
|
|
1666 }
|
|
|
1667
|
|
|
1668 static Lisp_Object
|
|
|
1669 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1670 {
|
|
|
1671 /* This function can GC */
|
|
|
1672 #if 0 /* FSFmacs */
|
|
|
1673 if (!NILP (h.var))
|
|
|
1674 specbind (h.var, c.val);
|
|
|
1675 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1676
|
|
|
1677 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1678 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
|
1679 throwing. */
|
|
|
1680 unbind_to (c.pdlcount, Qnil);
|
|
|
1681 return val;
|
|
|
1682 #else
|
|
|
1683 int speccount;
|
|
|
1684
|
|
|
1685 CHECK_TRUE_LIST (val);
|
|
|
1686 if (NILP (var))
|
|
|
1687 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1688
|
|
|
1689 speccount = specpdl_depth();
|
|
|
1690 specbind (var, Fcar (val));
|
|
|
1691 val = Fprogn (Fcdr (val));
|
|
|
1692 return unbind_to (speccount, val);
|
|
|
1693 #endif
|
|
|
1694 }
|
|
|
1695
|
|
|
1696 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1697 condition-case except that it takes three arguments rather
|
|
|
1698 than a single list of arguments. */
|
|
|
1699 Lisp_Object
|
|
|
1700 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
|
1701 {
|
|
|
1702 /* This function can GC */
|
|
|
1703 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1704 {
|
|
|
1705 if (NILP (handler))
|
|
|
1706 ;
|
|
|
1707 else if (CONSP (handler))
|
|
|
1708 {
|
|
|
1709 Lisp_Object conditions = XCAR (handler);
|
|
|
1710 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1711 if (SYMBOLP (conditions))
|
|
|
1712 ;
|
|
|
1713 else
|
|
|
1714 {
|
|
|
1715 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1716 if (!SYMBOLP (condition))
|
|
|
1717 goto invalid_condition_handler;
|
|
|
1718 }
|
|
|
1719 }
|
|
|
1720 else
|
|
|
1721 {
|
|
|
1722 invalid_condition_handler:
|
|
563
|
1723 sferror ("Invalid condition handler", handler);
|
|
428
|
1724 }
|
|
|
1725 }
|
|
|
1726
|
|
|
1727 CHECK_SYMBOL (var);
|
|
|
1728
|
|
|
1729 return condition_case_1 (handlers,
|
|
|
1730 Feval, bodyform,
|
|
|
1731 run_condition_case_handlers,
|
|
|
1732 var);
|
|
|
1733 }
|
|
|
1734
|
|
|
1735 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
|
1736 Regain control when an error is signalled.
|
|
|
1737 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1738 Executes BODYFORM and returns its value if no error happens.
|
|
|
1739 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1740 where the BODY is made of Lisp expressions.
|
|
|
1741
|
|
|
1742 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1743 error's condition names. If an error happens, the first applicable
|
|
|
1744 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1745 all errors, even those without the `error' condition name on them
|
|
|
1746 \(e.g. `quit').
|
|
|
1747
|
|
|
1748 The car of a handler may be a list of condition names
|
|
|
1749 instead of a single condition name.
|
|
|
1750
|
|
|
1751 When a handler handles an error,
|
|
|
1752 control returns to the condition-case and the handler BODY... is executed
|
|
|
1753 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1754 VAR may be nil; then you do not get access to the signal information.
|
|
|
1755
|
|
|
1756 The value of the last BODY form is returned from the condition-case.
|
|
|
1757 See also the function `signal' for more info.
|
|
|
1758
|
|
|
1759 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1760 and the current catches, condition-cases, and bindings have all been
|
|
|
1761 popped back to the state they were in just before the call to
|
|
|
1762 `condition-case'. This means that resignalling the error from
|
|
|
1763 within the handler will not result in an infinite loop.
|
|
|
1764
|
|
|
1765 If you want to establish an error handler that is called with the
|
|
|
1766 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1767 rather than when the handler was set, use `call-with-condition-handler'.
|
|
|
1768 */
|
|
|
1769 (args))
|
|
|
1770 {
|
|
|
1771 /* This function can GC */
|
|
|
1772 Lisp_Object var = XCAR (args);
|
|
|
1773 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1774 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1775 return condition_case_3 (bodyform, var, handlers);
|
|
|
1776 }
|
|
|
1777
|
|
|
1778 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
|
1779 Regain control when an error is signalled, without popping the stack.
|
|
|
1780 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1781 This function is similar to `condition-case', but the handler is invoked
|
|
|
1782 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1783 that was current when `signal' was called, rather than when the handler
|
|
|
1784 was established.
|
|
|
1785
|
|
|
1786 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
1787 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
1788 `signal' is called (this differs from `condition-case', which allows
|
|
|
1789 you to specify which errors are trapped). If the handler function
|
|
|
1790 returns, `signal' continues as if the handler were never invoked.
|
|
|
1791 \(It continues to look for handlers established earlier than this one,
|
|
|
1792 and invokes the standard error-handler if none is found.)
|
|
|
1793 */
|
|
|
1794 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
|
1795 {
|
|
|
1796 /* This function can GC */
|
|
|
1797 int speccount = specpdl_depth();
|
|
|
1798 Lisp_Object tem;
|
|
|
1799
|
|
|
1800 /* #### If there were a way to check that args[0] were a function
|
|
|
1801 which accepted one arg, that should be done here ... */
|
|
|
1802
|
|
|
1803 /* (handler-fun . handler-args) */
|
|
|
1804 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1805 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1806 Vcondition_handlers = tem;
|
|
|
1807
|
|
|
1808 /* Caller should have GC-protected args */
|
|
|
1809 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
|
1810 }
|
|
|
1811
|
|
|
1812 static int
|
|
|
1813 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1814 {
|
|
|
1815 if (EQ (type, Qt))
|
|
|
1816 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1817 * Use with caution! */
|
|
|
1818 return 1;
|
|
|
1819
|
|
|
1820 if (SYMBOLP (type))
|
|
|
1821 return !NILP (Fmemq (type, conditions));
|
|
|
1822
|
|
|
1823 for (; CONSP (type); type = XCDR (type))
|
|
|
1824 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1825 return 1;
|
|
|
1826
|
|
|
1827 return 0;
|
|
|
1828 }
|
|
|
1829
|
|
|
1830 static Lisp_Object
|
|
|
1831 return_from_signal (Lisp_Object value)
|
|
|
1832 {
|
|
|
1833 #if 1
|
|
|
1834 /* Most callers are not prepared to handle gc if this
|
|
|
1835 returns. So, since this feature is not very useful,
|
|
|
1836 take it out. */
|
|
|
1837 /* Have called debugger; return value to signaller */
|
|
|
1838 return value;
|
|
|
1839 #else /* But the reality is that that stinks, because: */
|
|
|
1840 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1841 to be continuable!! */
|
|
563
|
1842 signal_error (Qunimplemented,
|
|
|
1843 "Returning a value from an error is no longer supported",
|
|
|
1844 Qunbound);
|
|
428
|
1845 #endif
|
|
|
1846 }
|
|
|
1847
|
|
|
1848 extern int in_display;
|
|
|
1849
|
|
|
1850
|
|
|
1851 /************************************************************************/
|
|
|
1852 /* the workhorse error-signaling function */
|
|
|
1853 /************************************************************************/
|
|
|
1854
|
|
|
1855 /* #### This function has not been synched with FSF. It diverges
|
|
|
1856 significantly. */
|
|
|
1857
|
|
|
1858 static Lisp_Object
|
|
|
1859 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1860 {
|
|
|
1861 /* This function can GC */
|
|
|
1862 struct gcpro gcpro1, gcpro2;
|
|
|
1863 Lisp_Object conditions;
|
|
|
1864 Lisp_Object handlers;
|
|
|
1865 /* signal_call_debugger() could get called more than once
|
|
|
1866 (once when a call-with-condition-handler is about to
|
|
|
1867 be dealt with, and another when a condition-case handler
|
|
|
1868 is about to be invoked). So make sure the debugger and/or
|
|
|
1869 stack trace aren't done more than once. */
|
|
|
1870 int stack_trace_displayed = 0;
|
|
|
1871 int debugger_entered = 0;
|
|
|
1872 GCPRO2 (conditions, handlers);
|
|
|
1873
|
|
|
1874 if (!initialized)
|
|
|
1875 {
|
|
|
1876 /* who knows how much has been initialized? Safest bet is
|
|
|
1877 just to bomb out immediately. */
|
|
442
|
1878 /* let's not use stderr_out() here, because that does a bunch of
|
|
|
1879 things that might not be safe yet. */
|
|
428
|
1880 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1881 abort ();
|
|
|
1882 }
|
|
|
1883
|
|
|
1884 if (gc_in_progress || in_display)
|
|
|
1885 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1886 There is no sensible way to handle errors there. */
|
|
|
1887 abort ();
|
|
|
1888
|
|
|
1889 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1890
|
|
|
1891 for (handlers = Vcondition_handlers;
|
|
|
1892 CONSP (handlers);
|
|
|
1893 handlers = XCDR (handlers))
|
|
|
1894 {
|
|
|
1895 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1896 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1897 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1898
|
|
|
1899 if (!UNBOUNDP (handler_fun))
|
|
|
1900 {
|
|
|
1901 /* call-with-condition-handler */
|
|
|
1902 Lisp_Object tem;
|
|
|
1903 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1904 struct gcpro ngcpro1;
|
|
|
1905 NGCPRO1 (all_handlers);
|
|
|
1906 Vcondition_handlers = outer_handlers;
|
|
|
1907
|
|
|
1908 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1909 outer_handlers, 1,
|
|
|
1910 &stack_trace_displayed,
|
|
|
1911 &debugger_entered);
|
|
|
1912 if (!UNBOUNDP (tem))
|
|
|
1913 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1914
|
|
|
1915 tem = Fcons (sig, data);
|
|
|
1916 if (NILP (handler_data))
|
|
|
1917 tem = call1 (handler_fun, tem);
|
|
|
1918 else
|
|
|
1919 {
|
|
|
1920 /* (This code won't be used (for now?).) */
|
|
|
1921 struct gcpro nngcpro1;
|
|
|
1922 Lisp_Object args[3];
|
|
|
1923 NNGCPRO1 (args[0]);
|
|
|
1924 nngcpro1.nvars = 3;
|
|
|
1925 args[0] = handler_fun;
|
|
|
1926 args[1] = tem;
|
|
|
1927 args[2] = handler_data;
|
|
|
1928 nngcpro1.var = args;
|
|
|
1929 tem = Fapply (3, args);
|
|
|
1930 NNUNGCPRO;
|
|
|
1931 }
|
|
|
1932 NUNGCPRO;
|
|
|
1933 #if 0
|
|
|
1934 if (!EQ (tem, Qsignal))
|
|
|
1935 return return_from_signal (tem);
|
|
|
1936 #endif
|
|
|
1937 /* If handler didn't throw, try another handler */
|
|
|
1938 Vcondition_handlers = all_handlers;
|
|
|
1939 }
|
|
|
1940
|
|
|
1941 /* It's a condition-case handler */
|
|
|
1942
|
|
|
1943 /* t is used by handlers for all conditions, set up by C code.
|
|
|
1944 * debugger is not called even if debug_on_error */
|
|
|
1945 else if (EQ (handler_data, Qt))
|
|
|
1946 {
|
|
|
1947 UNGCPRO;
|
|
|
1948 return Fthrow (handlers, Fcons (sig, data));
|
|
|
1949 }
|
|
|
1950 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1951 addition it invokes the debugger if debug_on_error.
|
|
|
1952 This is normally used for the outer command-loop error
|
|
|
1953 handler. */
|
|
|
1954 else if (EQ (handler_data, Qerror))
|
|
|
1955 {
|
|
|
1956 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1957 outer_handlers, 0,
|
|
|
1958 &stack_trace_displayed,
|
|
|
1959 &debugger_entered);
|
|
|
1960
|
|
|
1961 UNGCPRO;
|
|
|
1962 if (!UNBOUNDP (tem))
|
|
|
1963 return return_from_signal (tem);
|
|
|
1964
|
|
|
1965 tem = Fcons (sig, data);
|
|
|
1966 return Fthrow (handlers, tem);
|
|
|
1967 }
|
|
|
1968 else
|
|
|
1969 {
|
|
|
1970 /* handler established by real (Lisp) condition-case */
|
|
|
1971 Lisp_Object h;
|
|
|
1972
|
|
|
1973 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1974 {
|
|
|
1975 Lisp_Object clause = Fcar (h);
|
|
|
1976 Lisp_Object tem = Fcar (clause);
|
|
|
1977
|
|
|
1978 if (condition_type_p (tem, conditions))
|
|
|
1979 {
|
|
|
1980 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1981 outer_handlers, 1,
|
|
|
1982 &stack_trace_displayed,
|
|
|
1983 &debugger_entered);
|
|
|
1984 UNGCPRO;
|
|
|
1985 if (!UNBOUNDP (tem))
|
|
|
1986 return return_from_signal (tem);
|
|
|
1987
|
|
|
1988 /* Doesn't return */
|
|
|
1989 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
|
1990 return Fthrow (handlers, tem);
|
|
|
1991 }
|
|
|
1992 }
|
|
|
1993 }
|
|
|
1994 }
|
|
|
1995
|
|
|
1996 /* If no handler is present now, try to run the debugger,
|
|
|
1997 and if that fails, throw to top level.
|
|
|
1998
|
|
|
1999 #### The only time that no handler is present is during
|
|
|
2000 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
2001 there is no 'top-level catch. (That's why the
|
|
|
2002 "bomb-out" hack was added.)
|
|
|
2003
|
|
|
2004 #### Fix this horrifitude!
|
|
|
2005 */
|
|
|
2006 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
2007 &stack_trace_displayed,
|
|
|
2008 &debugger_entered);
|
|
|
2009 UNGCPRO;
|
|
|
2010 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2011 return Qnil;
|
|
|
2012 }
|
|
|
2013
|
|
|
2014
|
|
|
2015 /****************** Error functions class 1 ******************/
|
|
|
2016
|
|
|
2017 /* Class 1: General functions that signal an error.
|
|
|
2018 These functions take an error type and a list of associated error
|
|
|
2019 data. */
|
|
|
2020
|
|
|
2021 /* The simplest external error function: it would be called
|
|
563
|
2022 signal_continuable_error_1() in the terminology below, but it's
|
|
428
|
2023 Lisp-callable. */
|
|
|
2024
|
|
|
2025 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
|
2026 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2027 An error symbol is a symbol defined using `define-error'.
|
|
|
2028 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2029 If the signal is handled, DATA is made available to the handler.
|
|
|
2030 See also the function `signal-error', and the functions to handle errors:
|
|
|
2031 `condition-case' and `call-with-condition-handler'.
|
|
|
2032
|
|
|
2033 Note that this function can return, if the debugger is invoked and the
|
|
|
2034 user invokes the "return from signal" option.
|
|
|
2035 */
|
|
|
2036 (error_symbol, data))
|
|
|
2037 {
|
|
|
2038 /* Fsignal() is one of these functions that's called all the time
|
|
|
2039 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2040 protect the objects because all sorts of weird stuff could
|
|
|
2041 happen. */
|
|
|
2042
|
|
|
2043 struct gcpro gcpro1;
|
|
|
2044
|
|
|
2045 GCPRO1 (data);
|
|
|
2046 if (!NILP (Vcurrent_error_state))
|
|
|
2047 {
|
|
|
2048 if (!NILP (Vcurrent_warning_class))
|
|
|
2049 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2050 Fcons (error_symbol, data));
|
|
|
2051 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2052 abort (); /* Better not get here! */
|
|
|
2053 }
|
|
|
2054 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2055 }
|
|
|
2056
|
|
|
2057 /* Signal a non-continuable error. */
|
|
|
2058
|
|
|
2059 DOESNT_RETURN
|
|
563
|
2060 signal_error_1 (Lisp_Object sig, Lisp_Object data)
|
|
428
|
2061 {
|
|
|
2062 for (;;)
|
|
|
2063 Fsignal (sig, data);
|
|
|
2064 }
|
|
442
|
2065 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
2066 void
|
|
|
2067 check_error_state_sanity (void)
|
|
|
2068 {
|
|
|
2069 struct catchtag *c;
|
|
|
2070 int found_error_tag = 0;
|
|
|
2071
|
|
|
2072 for (c = catchlist; c; c = c->next)
|
|
|
2073 {
|
|
|
2074 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2075 {
|
|
|
2076 found_error_tag = 1;
|
|
|
2077 break;
|
|
|
2078 }
|
|
|
2079 }
|
|
|
2080
|
|
|
2081 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
|
2082 }
|
|
|
2083 #endif
|
|
428
|
2084
|
|
|
2085 static Lisp_Object
|
|
|
2086 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2087 {
|
|
|
2088 Vcurrent_warning_class = warning_class;
|
|
|
2089 return Qnil;
|
|
|
2090 }
|
|
|
2091
|
|
|
2092 static Lisp_Object
|
|
|
2093 restore_current_error_state (Lisp_Object error_state)
|
|
|
2094 {
|
|
|
2095 Vcurrent_error_state = error_state;
|
|
|
2096 return Qnil;
|
|
|
2097 }
|
|
|
2098
|
|
442
|
2099 static Lisp_Object
|
|
|
2100 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2101 {
|
|
|
2102 Lisp_Object val;
|
|
|
2103 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
|
2104 Lisp_Object no_error = kludgy_args[2];
|
|
|
2105 int speccount = specpdl_depth ();
|
|
|
2106
|
|
|
2107 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2108 {
|
|
|
2109 record_unwind_protect (restore_current_error_state,
|
|
|
2110 Vcurrent_error_state);
|
|
|
2111 Vcurrent_error_state = no_error;
|
|
|
2112 }
|
|
|
2113 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2114 kludgy_args + 3, XINT (kludgy_args[1]));
|
|
|
2115 return unbind_to (speccount, val);
|
|
|
2116 }
|
|
|
2117
|
|
428
|
2118 /* Many functions would like to do one of three things if an error
|
|
|
2119 occurs:
|
|
|
2120
|
|
|
2121 (1) signal the error, as usual.
|
|
|
2122 (2) silently fail and return some error value.
|
|
|
2123 (3) do as (2) but issue a warning in the process.
|
|
|
2124
|
|
578
|
2125 Currently there's lots of stuff that passes an Error_Behavior
|
|
428
|
2126 value and calls maybe_signal_error() and other such functions.
|
|
|
2127 This approach is inherently error-prone and broken. A much
|
|
|
2128 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2129 Wrap this around any function in which you might want errors
|
|
|
2130 to not be errors.
|
|
|
2131 */
|
|
|
2132
|
|
|
2133 Lisp_Object
|
|
|
2134 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
578
|
2135 Lisp_Object class, Error_Behavior errb,
|
|
428
|
2136 int nargs, ...)
|
|
|
2137 {
|
|
|
2138 va_list vargs;
|
|
|
2139 int speccount;
|
|
442
|
2140 Lisp_Object kludgy_args[23];
|
|
|
2141 Lisp_Object *args = kludgy_args + 3;
|
|
428
|
2142 int i;
|
|
|
2143 Lisp_Object no_error;
|
|
|
2144
|
|
|
2145 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2146 assert (!NILP (class));
|
|
|
2147 assert (nargs >= 0 && nargs < 20);
|
|
|
2148
|
|
|
2149 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2150 already trapped, we leave them trapped.)
|
|
|
2151
|
|
|
2152 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2153
|
|
|
2154 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2155 were previously enabled. However, we never change the
|
|
|
2156 warning class from one to another. */
|
|
|
2157 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2158 {
|
|
|
2159 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2160 class = Qnil;
|
|
|
2161 errb = ERROR_ME_NOT;
|
|
|
2162 no_error = Qt;
|
|
|
2163 }
|
|
|
2164 else
|
|
|
2165 no_error = Qnil;
|
|
|
2166
|
|
|
2167 va_start (vargs, nargs);
|
|
|
2168 for (i = 0; i < nargs; i++)
|
|
|
2169 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2170 va_end (vargs);
|
|
|
2171
|
|
|
2172 /* If error-checking is not disabled, just call the function.
|
|
|
2173 It's important not to override disabled error-checking with
|
|
|
2174 enabled error-checking. */
|
|
|
2175
|
|
|
2176 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
2177 {
|
|
|
2178 Lisp_Object val;
|
|
|
2179 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2180 return val;
|
|
|
2181 }
|
|
|
2182
|
|
442
|
2183 speccount = specpdl_depth ();
|
|
428
|
2184 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2185 {
|
|
|
2186 /* If we're currently calling for no warnings, then make it so.
|
|
|
2187 If we're currently calling for warnings and we weren't
|
|
|
2188 previously, then set our warning class; otherwise, leave
|
|
|
2189 the existing one alone. */
|
|
|
2190 record_unwind_protect (restore_current_warning_class,
|
|
|
2191 Vcurrent_warning_class);
|
|
|
2192 Vcurrent_warning_class = class;
|
|
|
2193 }
|
|
|
2194
|
|
|
2195 {
|
|
|
2196 int threw;
|
|
|
2197 Lisp_Object the_retval;
|
|
|
2198 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2199 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2200 struct gcpro gcpro1, gcpro2;
|
|
|
2201
|
|
|
2202 GCPRO2 (opaque1, opaque2);
|
|
|
2203 kludgy_args[0] = opaque2;
|
|
|
2204 kludgy_args[1] = make_int (nargs);
|
|
442
|
2205 kludgy_args[2] = no_error;
|
|
428
|
2206 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2207 call_with_suspended_errors_1,
|
|
|
2208 opaque1, &threw);
|
|
|
2209 free_opaque_ptr (opaque1);
|
|
|
2210 free_opaque_ptr (opaque2);
|
|
|
2211 UNGCPRO;
|
|
|
2212 /* Use the returned value except in non-local exit, when
|
|
|
2213 RETVAL applies. */
|
|
|
2214 /* Some perverse compilers require the perverse cast below. */
|
|
|
2215 return unbind_to (speccount,
|
|
|
2216 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
|
2217 }
|
|
|
2218 }
|
|
|
2219
|
|
|
2220 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2221 according to ERRB. CLASS is the class of warning and should
|
|
|
2222 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2223 Qresource, etc.). */
|
|
|
2224
|
|
|
2225 void
|
|
563
|
2226 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
578
|
2227 Error_Behavior errb)
|
|
428
|
2228 {
|
|
|
2229 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2230 return;
|
|
|
2231 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2232 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2233 else
|
|
|
2234 for (;;)
|
|
|
2235 Fsignal (sig, data);
|
|
|
2236 }
|
|
|
2237
|
|
|
2238 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2239 according to ERRB. */
|
|
|
2240
|
|
|
2241 Lisp_Object
|
|
563
|
2242 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data,
|
|
578
|
2243 Lisp_Object class, Error_Behavior errb)
|
|
428
|
2244 {
|
|
|
2245 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2246 return Qnil;
|
|
|
2247 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2248 {
|
|
|
2249 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2250 return Qnil;
|
|
|
2251 }
|
|
|
2252 else
|
|
|
2253 return Fsignal (sig, data);
|
|
|
2254 }
|
|
|
2255
|
|
|
2256
|
|
|
2257 /****************** Error functions class 2 ******************/
|
|
|
2258
|
|
563
|
2259 /* Class 2: Signal an error with a string and an associated object.
|
|
|
2260 Normally these functions are used to attach one associated object,
|
|
|
2261 but to attach no objects, specify Qunbound for FROB, and for more
|
|
|
2262 than one object, make a list of the objects with Qunbound as the
|
|
|
2263 first element. (If you have specifically two objects to attach,
|
|
|
2264 consider using the function in class 3 below.) These functions
|
|
|
2265 signal an error of a specified type, whose data is one or more
|
|
|
2266 objects (usually two), a string the related Lisp object(s)
|
|
|
2267 specified as FROB. */
|
|
|
2268
|
|
|
2269 /* Out of REASON and FROB, return a list of elements suitable for passing
|
|
|
2270 to signal_error_1(). */
|
|
|
2271
|
|
|
2272 Lisp_Object
|
|
|
2273 build_error_data (const char *reason, Lisp_Object frob)
|
|
|
2274 {
|
|
|
2275 if (EQ (frob, Qunbound))
|
|
|
2276 frob = Qnil;
|
|
|
2277 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound))
|
|
|
2278 frob = XCDR (frob);
|
|
|
2279 else
|
|
|
2280 frob = list1 (frob);
|
|
|
2281 if (!reason)
|
|
|
2282 return frob;
|
|
|
2283 else
|
|
|
2284 return Fcons (build_translated_string (reason), frob);
|
|
|
2285 }
|
|
|
2286
|
|
|
2287 DOESNT_RETURN
|
|
|
2288 signal_error (Lisp_Object type, const char *reason, Lisp_Object frob)
|
|
|
2289 {
|
|
|
2290 signal_error_1 (type, build_error_data (reason, frob));
|
|
|
2291 }
|
|
|
2292
|
|
|
2293 void
|
|
|
2294 maybe_signal_error (Lisp_Object type, const char *reason,
|
|
|
2295 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2296 Error_Behavior errb)
|
|
563
|
2297 {
|
|
|
2298 /* Optimization: */
|
|
|
2299 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2300 return;
|
|
|
2301 maybe_signal_error_1 (type, build_error_data (reason, frob), class, errb);
|
|
|
2302 }
|
|
|
2303
|
|
|
2304 Lisp_Object
|
|
|
2305 signal_continuable_error (Lisp_Object type, const char *reason,
|
|
|
2306 Lisp_Object frob)
|
|
|
2307 {
|
|
|
2308 return Fsignal (type, build_error_data (reason, frob));
|
|
|
2309 }
|
|
|
2310
|
|
|
2311 Lisp_Object
|
|
|
2312 maybe_signal_continuable_error (Lisp_Object type, const char *reason,
|
|
|
2313 Lisp_Object frob, Lisp_Object class,
|
|
578
|
2314 Error_Behavior errb)
|
|
563
|
2315 {
|
|
|
2316 /* Optimization: */
|
|
|
2317 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2318 return Qnil;
|
|
|
2319 return maybe_signal_continuable_error_1 (type,
|
|
|
2320 build_error_data (reason, frob),
|
|
|
2321 class, errb);
|
|
|
2322 }
|
|
|
2323
|
|
|
2324
|
|
|
2325 /****************** Error functions class 3 ******************/
|
|
|
2326
|
|
|
2327 /* Class 3: Signal an error with a string and two associated objects.
|
|
|
2328 These functions signal an error of a specified type, whose data
|
|
|
2329 is three objects, a string and two related Lisp objects.
|
|
|
2330 (The equivalent could be accomplished using the class 2 functions,
|
|
|
2331 but these are more convenient in this particular case.) */
|
|
|
2332
|
|
|
2333 DOESNT_RETURN
|
|
|
2334 signal_error_2 (Lisp_Object type, const char *reason,
|
|
|
2335 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2336 {
|
|
|
2337 signal_error_1 (type, list3 (build_translated_string (reason), frob0,
|
|
|
2338 frob1));
|
|
|
2339 }
|
|
|
2340
|
|
|
2341 void
|
|
|
2342 maybe_signal_error_2 (Lisp_Object type, const char *reason,
|
|
|
2343 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2344 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2345 {
|
|
|
2346 /* Optimization: */
|
|
|
2347 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2348 return;
|
|
|
2349 maybe_signal_error_1 (type, list3 (build_translated_string (reason), frob0,
|
|
|
2350 frob1), class, errb);
|
|
|
2351 }
|
|
|
2352
|
|
|
2353 Lisp_Object
|
|
|
2354 signal_continuable_error_2 (Lisp_Object type, const char *reason,
|
|
|
2355 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2356 {
|
|
|
2357 return Fsignal (type, list3 (build_translated_string (reason), frob0,
|
|
|
2358 frob1));
|
|
|
2359 }
|
|
|
2360
|
|
|
2361 Lisp_Object
|
|
|
2362 maybe_signal_continuable_error_2 (Lisp_Object type, const char *reason,
|
|
|
2363 Lisp_Object frob0, Lisp_Object frob1,
|
|
578
|
2364 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2365 {
|
|
|
2366 /* Optimization: */
|
|
|
2367 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2368 return Qnil;
|
|
|
2369 return maybe_signal_continuable_error_1
|
|
|
2370 (type, list3 (build_translated_string (reason), frob0, frob1),
|
|
|
2371 class, errb);
|
|
|
2372 }
|
|
|
2373
|
|
|
2374
|
|
|
2375 /****************** Error functions class 4 ******************/
|
|
|
2376
|
|
|
2377 /* Class 4: Printf-like functions that signal an error.
|
|
442
|
2378 These functions signal an error of a specified type, whose data
|
|
428
|
2379 is a single string, created using the arguments. */
|
|
|
2380
|
|
|
2381 DOESNT_RETURN
|
|
563
|
2382 signal_ferror (Lisp_Object type, const char *fmt, ...)
|
|
442
|
2383 {
|
|
|
2384 Lisp_Object obj;
|
|
|
2385 va_list args;
|
|
|
2386
|
|
|
2387 va_start (args, fmt);
|
|
|
2388 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2389 args);
|
|
|
2390 va_end (args);
|
|
|
2391
|
|
|
2392 /* Fsignal GC-protects its args */
|
|
563
|
2393 signal_error (type, 0, obj);
|
|
442
|
2394 }
|
|
|
2395
|
|
|
2396 void
|
|
578
|
2397 maybe_signal_ferror (Lisp_Object type, Lisp_Object class, Error_Behavior errb,
|
|
563
|
2398 const char *fmt, ...)
|
|
442
|
2399 {
|
|
|
2400 Lisp_Object obj;
|
|
|
2401 va_list args;
|
|
|
2402
|
|
|
2403 /* Optimization: */
|
|
|
2404 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2405 return;
|
|
|
2406
|
|
|
2407 va_start (args, fmt);
|
|
|
2408 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2409 args);
|
|
|
2410 va_end (args);
|
|
|
2411
|
|
|
2412 /* Fsignal GC-protects its args */
|
|
563
|
2413 maybe_signal_error (type, 0, obj, class, errb);
|
|
442
|
2414 }
|
|
|
2415
|
|
|
2416 Lisp_Object
|
|
563
|
2417 signal_continuable_ferror (Lisp_Object type, const char *fmt, ...)
|
|
428
|
2418 {
|
|
|
2419 Lisp_Object obj;
|
|
|
2420 va_list args;
|
|
|
2421
|
|
|
2422 va_start (args, fmt);
|
|
442
|
2423 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2424 args);
|
|
|
2425 va_end (args);
|
|
|
2426
|
|
|
2427 /* Fsignal GC-protects its args */
|
|
|
2428 return Fsignal (type, list1 (obj));
|
|
|
2429 }
|
|
|
2430
|
|
|
2431 Lisp_Object
|
|
563
|
2432 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class,
|
|
578
|
2433 Error_Behavior errb, const char *fmt, ...)
|
|
442
|
2434 {
|
|
|
2435 Lisp_Object obj;
|
|
|
2436 va_list args;
|
|
|
2437
|
|
|
2438 /* Optimization: */
|
|
|
2439 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2440 return Qnil;
|
|
|
2441
|
|
|
2442 va_start (args, fmt);
|
|
|
2443 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2444 args);
|
|
|
2445 va_end (args);
|
|
|
2446
|
|
|
2447 /* Fsignal GC-protects its args */
|
|
563
|
2448 return maybe_signal_continuable_error (type, 0, obj, class, errb);
|
|
442
|
2449 }
|
|
|
2450
|
|
|
2451
|
|
|
2452 /****************** Error functions class 5 ******************/
|
|
|
2453
|
|
563
|
2454 /* Class 5: Printf-like functions that signal an error.
|
|
442
|
2455 These functions signal an error of a specified type, whose data
|
|
563
|
2456 is a one or more objects, a string (created using the arguments)
|
|
|
2457 and additional Lisp objects specified in FROB. (The syntax of FROB
|
|
|
2458 is the same as for class 2.)
|
|
|
2459
|
|
|
2460 There is no need for a class 6 because you can always attach 2
|
|
|
2461 objects using class 5 (for FROB, specify a list with three
|
|
|
2462 elements, the first of which is Qunbound), and these functions are
|
|
|
2463 not commonly used.
|
|
|
2464 */
|
|
442
|
2465
|
|
|
2466 DOESNT_RETURN
|
|
563
|
2467 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const char *fmt,
|
|
|
2468 ...)
|
|
442
|
2469 {
|
|
|
2470 Lisp_Object obj;
|
|
|
2471 va_list args;
|
|
|
2472
|
|
|
2473 va_start (args, fmt);
|
|
|
2474 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2475 args);
|
|
|
2476 va_end (args);
|
|
|
2477
|
|
|
2478 /* Fsignal GC-protects its args */
|
|
563
|
2479 signal_error_1 (type, Fcons (obj, build_error_data (0, frob)));
|
|
442
|
2480 }
|
|
|
2481
|
|
|
2482 void
|
|
563
|
2483 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
578
|
2484 Lisp_Object class, Error_Behavior errb,
|
|
563
|
2485 const char *fmt, ...)
|
|
442
|
2486 {
|
|
|
2487 Lisp_Object obj;
|
|
|
2488 va_list args;
|
|
|
2489
|
|
|
2490 /* Optimization: */
|
|
|
2491 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2492 return;
|
|
|
2493
|
|
|
2494 va_start (args, fmt);
|
|
|
2495 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2496 args);
|
|
|
2497 va_end (args);
|
|
|
2498
|
|
|
2499 /* Fsignal GC-protects its args */
|
|
563
|
2500 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class,
|
|
|
2501 errb);
|
|
428
|
2502 }
|
|
|
2503
|
|
|
2504 Lisp_Object
|
|
563
|
2505 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2506 const char *fmt, ...)
|
|
428
|
2507 {
|
|
|
2508 Lisp_Object obj;
|
|
|
2509 va_list args;
|
|
|
2510
|
|
|
2511 va_start (args, fmt);
|
|
442
|
2512 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2513 args);
|
|
|
2514 va_end (args);
|
|
|
2515
|
|
|
2516 /* Fsignal GC-protects its args */
|
|
563
|
2517 return Fsignal (type, Fcons (obj, build_error_data (0, frob)));
|
|
428
|
2518 }
|
|
|
2519
|
|
|
2520 Lisp_Object
|
|
563
|
2521 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob,
|
|
|
2522 Lisp_Object class,
|
|
578
|
2523 Error_Behavior errb,
|
|
563
|
2524 const char *fmt, ...)
|
|
428
|
2525 {
|
|
|
2526 Lisp_Object obj;
|
|
|
2527 va_list args;
|
|
|
2528
|
|
|
2529 /* Optimization: */
|
|
|
2530 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2531 return Qnil;
|
|
|
2532
|
|
|
2533 va_start (args, fmt);
|
|
442
|
2534 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
428
|
2535 args);
|
|
|
2536 va_end (args);
|
|
|
2537
|
|
|
2538 /* Fsignal GC-protects its args */
|
|
563
|
2539 return maybe_signal_continuable_error_1 (type,
|
|
|
2540 Fcons (obj,
|
|
|
2541 build_error_data (0, frob)),
|
|
|
2542 class, errb);
|
|
428
|
2543 }
|
|
|
2544
|
|
|
2545
|
|
|
2546 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2547 void
|
|
|
2548 signal_quit (void)
|
|
|
2549 {
|
|
|
2550 /* This function can GC */
|
|
|
2551 if (EQ (Vquit_flag, Qcritical))
|
|
|
2552 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2553 Vquit_flag = Qnil;
|
|
|
2554 /* note that this is continuable. */
|
|
|
2555 Fsignal (Qquit, Qnil);
|
|
|
2556 }
|
|
|
2557
|
|
|
2558
|
|
563
|
2559 /************************ convenience error functions ***********************/
|
|
|
2560
|
|
436
|
2561 Lisp_Object
|
|
428
|
2562 signal_void_function_error (Lisp_Object function)
|
|
|
2563 {
|
|
436
|
2564 return Fsignal (Qvoid_function, list1 (function));
|
|
428
|
2565 }
|
|
|
2566
|
|
436
|
2567 Lisp_Object
|
|
428
|
2568 signal_invalid_function_error (Lisp_Object function)
|
|
|
2569 {
|
|
436
|
2570 return Fsignal (Qinvalid_function, list1 (function));
|
|
428
|
2571 }
|
|
|
2572
|
|
436
|
2573 Lisp_Object
|
|
428
|
2574 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2575 {
|
|
436
|
2576 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2577 list2 (function, make_int (nargs)));
|
|
428
|
2578 }
|
|
|
2579
|
|
|
2580 /* Used in list traversal macros for efficiency. */
|
|
436
|
2581 DOESNT_RETURN
|
|
428
|
2582 signal_malformed_list_error (Lisp_Object list)
|
|
|
2583 {
|
|
563
|
2584 signal_error (Qmalformed_list, 0, list);
|
|
428
|
2585 }
|
|
|
2586
|
|
436
|
2587 DOESNT_RETURN
|
|
428
|
2588 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2589 {
|
|
563
|
2590 signal_error (Qmalformed_property_list, 0, list);
|
|
428
|
2591 }
|
|
|
2592
|
|
436
|
2593 DOESNT_RETURN
|
|
428
|
2594 signal_circular_list_error (Lisp_Object list)
|
|
|
2595 {
|
|
563
|
2596 signal_error (Qcircular_list, 0, list);
|
|
428
|
2597 }
|
|
|
2598
|
|
436
|
2599 DOESNT_RETURN
|
|
428
|
2600 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2601 {
|
|
563
|
2602 signal_error (Qcircular_property_list, 0, list);
|
|
428
|
2603 }
|
|
442
|
2604
|
|
|
2605 DOESNT_RETURN
|
|
|
2606 syntax_error (const char *reason, Lisp_Object frob)
|
|
|
2607 {
|
|
563
|
2608 signal_error (Qsyntax_error, reason, frob);
|
|
442
|
2609 }
|
|
|
2610
|
|
|
2611 DOESNT_RETURN
|
|
|
2612 syntax_error_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2613 {
|
|
563
|
2614 signal_error_2 (Qsyntax_error, reason, frob1, frob2);
|
|
|
2615 }
|
|
|
2616
|
|
|
2617 void
|
|
|
2618 maybe_syntax_error (const char *reason, Lisp_Object frob,
|
|
578
|
2619 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2620 {
|
|
|
2621 maybe_signal_error (Qsyntax_error, reason, frob, class, errb);
|
|
|
2622 }
|
|
|
2623
|
|
|
2624 DOESNT_RETURN
|
|
|
2625 sferror (const char *reason, Lisp_Object frob)
|
|
|
2626 {
|
|
|
2627 signal_error (Qstructure_formation_error, reason, frob);
|
|
|
2628 }
|
|
|
2629
|
|
|
2630 DOESNT_RETURN
|
|
|
2631 sferror_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2632 {
|
|
|
2633 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2);
|
|
|
2634 }
|
|
|
2635
|
|
|
2636 void
|
|
|
2637 maybe_sferror (const char *reason, Lisp_Object frob,
|
|
578
|
2638 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2639 {
|
|
|
2640 maybe_signal_error (Qstructure_formation_error, reason, frob, class, errb);
|
|
442
|
2641 }
|
|
|
2642
|
|
|
2643 DOESNT_RETURN
|
|
|
2644 invalid_argument (const char *reason, Lisp_Object frob)
|
|
|
2645 {
|
|
563
|
2646 signal_error (Qinvalid_argument, reason, frob);
|
|
442
|
2647 }
|
|
|
2648
|
|
|
2649 DOESNT_RETURN
|
|
|
2650 invalid_argument_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2651 {
|
|
563
|
2652 signal_error_2 (Qinvalid_argument, reason, frob1, frob2);
|
|
|
2653 }
|
|
|
2654
|
|
|
2655 void
|
|
|
2656 maybe_invalid_argument (const char *reason, Lisp_Object frob,
|
|
578
|
2657 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2658 {
|
|
|
2659 maybe_signal_error (Qinvalid_argument, reason, frob, class, errb);
|
|
|
2660 }
|
|
|
2661
|
|
|
2662 DOESNT_RETURN
|
|
|
2663 invalid_constant (const char *reason, Lisp_Object frob)
|
|
|
2664 {
|
|
|
2665 signal_error (Qinvalid_constant, reason, frob);
|
|
|
2666 }
|
|
|
2667
|
|
|
2668 DOESNT_RETURN
|
|
|
2669 invalid_constant_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2670 {
|
|
|
2671 signal_error_2 (Qinvalid_constant, reason, frob1, frob2);
|
|
|
2672 }
|
|
|
2673
|
|
|
2674 void
|
|
|
2675 maybe_invalid_constant (const char *reason, Lisp_Object frob,
|
|
578
|
2676 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2677 {
|
|
|
2678 maybe_signal_error (Qinvalid_constant, reason, frob, class, errb);
|
|
442
|
2679 }
|
|
|
2680
|
|
|
2681 DOESNT_RETURN
|
|
|
2682 invalid_operation (const char *reason, Lisp_Object frob)
|
|
|
2683 {
|
|
563
|
2684 signal_error (Qinvalid_operation, reason, frob);
|
|
442
|
2685 }
|
|
|
2686
|
|
|
2687 DOESNT_RETURN
|
|
|
2688 invalid_operation_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2689 {
|
|
563
|
2690 signal_error_2 (Qinvalid_operation, reason, frob1, frob2);
|
|
|
2691 }
|
|
|
2692
|
|
|
2693 void
|
|
|
2694 maybe_invalid_operation (const char *reason, Lisp_Object frob,
|
|
578
|
2695 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2696 {
|
|
|
2697 maybe_signal_error (Qinvalid_operation, reason, frob, class, errb);
|
|
442
|
2698 }
|
|
|
2699
|
|
|
2700 DOESNT_RETURN
|
|
|
2701 invalid_change (const char *reason, Lisp_Object frob)
|
|
|
2702 {
|
|
563
|
2703 signal_error (Qinvalid_change, reason, frob);
|
|
442
|
2704 }
|
|
|
2705
|
|
|
2706 DOESNT_RETURN
|
|
|
2707 invalid_change_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2708 {
|
|
563
|
2709 signal_error_2 (Qinvalid_change, reason, frob1, frob2);
|
|
|
2710 }
|
|
|
2711
|
|
|
2712 void
|
|
|
2713 maybe_invalid_change (const char *reason, Lisp_Object frob,
|
|
578
|
2714 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2715 {
|
|
|
2716 maybe_signal_error (Qinvalid_change, reason, frob, class, errb);
|
|
|
2717 }
|
|
|
2718
|
|
|
2719 DOESNT_RETURN
|
|
|
2720 invalid_state (const char *reason, Lisp_Object frob)
|
|
|
2721 {
|
|
|
2722 signal_error (Qinvalid_state, reason, frob);
|
|
|
2723 }
|
|
|
2724
|
|
|
2725 DOESNT_RETURN
|
|
|
2726 invalid_state_2 (const char *reason, Lisp_Object frob1, Lisp_Object frob2)
|
|
|
2727 {
|
|
|
2728 signal_error_2 (Qinvalid_state, reason, frob1, frob2);
|
|
|
2729 }
|
|
|
2730
|
|
|
2731 void
|
|
|
2732 maybe_invalid_state (const char *reason, Lisp_Object frob,
|
|
578
|
2733 Lisp_Object class, Error_Behavior errb)
|
|
563
|
2734 {
|
|
|
2735 maybe_signal_error (Qinvalid_state, reason, frob, class, errb);
|
|
|
2736 }
|
|
|
2737
|
|
|
2738 DOESNT_RETURN
|
|
|
2739 wtaerror (const char *reason, Lisp_Object frob)
|
|
|
2740 {
|
|
|
2741 signal_error (Qwrong_type_argument, reason, frob);
|
|
|
2742 }
|
|
|
2743
|
|
|
2744 DOESNT_RETURN
|
|
|
2745 stack_overflow (const char *reason, Lisp_Object frob)
|
|
|
2746 {
|
|
|
2747 signal_error (Qstack_overflow, reason, frob);
|
|
|
2748 }
|
|
|
2749
|
|
|
2750 DOESNT_RETURN
|
|
|
2751 out_of_memory (const char *reason, Lisp_Object frob)
|
|
|
2752 {
|
|
|
2753 signal_error (Qout_of_memory, reason, frob);
|
|
|
2754 }
|
|
|
2755
|
|
|
2756 DOESNT_RETURN
|
|
|
2757 printing_unreadable_object (const char *fmt, ...)
|
|
|
2758 {
|
|
|
2759 Lisp_Object obj;
|
|
|
2760 va_list args;
|
|
|
2761
|
|
|
2762 va_start (args, fmt);
|
|
|
2763 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2764 args);
|
|
|
2765 va_end (args);
|
|
|
2766
|
|
|
2767 /* Fsignal GC-protects its args */
|
|
|
2768 signal_error (Qprinting_unreadable_object, 0, obj);
|
|
442
|
2769 }
|
|
|
2770
|
|
428
|
2771
|
|
|
2772 /************************************************************************/
|
|
|
2773 /* User commands */
|
|
|
2774 /************************************************************************/
|
|
|
2775
|
|
|
2776 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
|
2777 Return t if FUNCTION makes provisions for interactive calling.
|
|
|
2778 This means it contains a description for how to read arguments to give it.
|
|
|
2779 The value is nil for an invalid function or a symbol with no function
|
|
|
2780 definition.
|
|
|
2781
|
|
|
2782 Interactively callable functions include
|
|
|
2783
|
|
|
2784 -- strings and vectors (treated as keyboard macros)
|
|
|
2785 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2786 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2787 (i.e. the interactive flag)
|
|
|
2788 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2789 value
|
|
|
2790 -- subrs (built-in functions) that are interactively callable
|
|
|
2791
|
|
|
2792 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
|
2793 */
|
|
|
2794 (function))
|
|
|
2795 {
|
|
|
2796 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2797
|
|
|
2798 if (COMPILED_FUNCTIONP (fun))
|
|
|
2799 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2800
|
|
|
2801 /* Lists may represent commands. */
|
|
|
2802 if (CONSP (fun))
|
|
|
2803 {
|
|
|
2804 Lisp_Object funcar = XCAR (fun);
|
|
|
2805 if (EQ (funcar, Qlambda))
|
|
|
2806 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2807 if (EQ (funcar, Qautoload))
|
|
|
2808 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2809 else
|
|
|
2810 return Qnil;
|
|
|
2811 }
|
|
|
2812
|
|
|
2813 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2814 interactive spec. */
|
|
|
2815 if (SUBRP (fun))
|
|
|
2816 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2817
|
|
|
2818 /* Strings and vectors are keyboard macros. */
|
|
|
2819 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2820 return Qt;
|
|
|
2821
|
|
|
2822 /* Everything else (including Qunbound) is not a command. */
|
|
|
2823 return Qnil;
|
|
|
2824 }
|
|
|
2825
|
|
|
2826 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
|
2827 Execute CMD as an editor command.
|
|
|
2828 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2829 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2830 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2831 when reading the arguments.
|
|
|
2832 */
|
|
444
|
2833 (cmd, record_flag, keys))
|
|
428
|
2834 {
|
|
|
2835 /* This function can GC */
|
|
|
2836 Lisp_Object prefixarg;
|
|
|
2837 Lisp_Object final = cmd;
|
|
|
2838 struct backtrace backtrace;
|
|
|
2839 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2840
|
|
|
2841 prefixarg = con->prefix_arg;
|
|
|
2842 con->prefix_arg = Qnil;
|
|
|
2843 Vcurrent_prefix_arg = prefixarg;
|
|
|
2844 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2845
|
|
|
2846 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2847 return run_hook (Vdisabled_command_hook);
|
|
|
2848
|
|
|
2849 for (;;)
|
|
|
2850 {
|
|
|
2851 final = indirect_function (cmd, 1);
|
|
|
2852 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2853 do_autoload (final, cmd);
|
|
|
2854 else
|
|
|
2855 break;
|
|
|
2856 }
|
|
|
2857
|
|
|
2858 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2859 {
|
|
|
2860 backtrace.function = &Qcall_interactively;
|
|
|
2861 backtrace.args = &cmd;
|
|
|
2862 backtrace.nargs = 1;
|
|
|
2863 backtrace.evalargs = 0;
|
|
|
2864 backtrace.pdlcount = specpdl_depth();
|
|
|
2865 backtrace.debug_on_exit = 0;
|
|
|
2866 PUSH_BACKTRACE (backtrace);
|
|
|
2867
|
|
444
|
2868 final = Fcall_interactively (cmd, record_flag, keys);
|
|
428
|
2869
|
|
|
2870 POP_BACKTRACE (backtrace);
|
|
|
2871 return final;
|
|
|
2872 }
|
|
|
2873 else if (STRINGP (final) || VECTORP (final))
|
|
|
2874 {
|
|
|
2875 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2876 }
|
|
|
2877 else
|
|
|
2878 {
|
|
|
2879 Fsignal (Qwrong_type_argument,
|
|
|
2880 Fcons (Qcommandp,
|
|
|
2881 (EQ (cmd, final)
|
|
|
2882 ? list1 (cmd)
|
|
|
2883 : list2 (cmd, final))));
|
|
|
2884 return Qnil;
|
|
|
2885 }
|
|
|
2886 }
|
|
|
2887
|
|
|
2888 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
|
2889 Return t if function in which this appears was called interactively.
|
|
|
2890 This means that the function was called with call-interactively (which
|
|
|
2891 includes being called as the binding of a key)
|
|
|
2892 and input is currently coming from the keyboard (not in keyboard macro).
|
|
|
2893 */
|
|
|
2894 ())
|
|
|
2895 {
|
|
|
2896 REGISTER struct backtrace *btp;
|
|
|
2897 REGISTER Lisp_Object fun;
|
|
|
2898
|
|
|
2899 if (!INTERACTIVE)
|
|
|
2900 return Qnil;
|
|
|
2901
|
|
|
2902 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2903 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2904 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2905 compiled function. */
|
|
|
2906 btp = backtrace_list;
|
|
|
2907
|
|
|
2908 #if 0 /* FSFmacs */
|
|
|
2909
|
|
|
2910 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2911 out which one is more correct. */
|
|
|
2912 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2913 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2914 fun = Findirect_function (*btp->function);
|
|
|
2915 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2916 btp = btp->next;
|
|
|
2917
|
|
|
2918 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2919 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2920 definition, this function isn't really being called
|
|
|
2921 interactively, but because that's the way Emacs 18 always builds
|
|
|
2922 byte-compiled functions, we'll accept it for now. */
|
|
|
2923 if (EQ (*btp->function, Qbyte_code))
|
|
|
2924 btp = btp->next;
|
|
|
2925
|
|
|
2926 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2927 looking at several frames for special forms. Skip past them. */
|
|
|
2928 while (btp &&
|
|
|
2929 btp->nargs == UNEVALLED)
|
|
|
2930 btp = btp->next;
|
|
|
2931
|
|
|
2932 #else
|
|
|
2933
|
|
|
2934 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2935 btp = btp->next;
|
|
|
2936 for (;
|
|
|
2937 btp && (btp->nargs == UNEVALLED
|
|
|
2938 || EQ (*btp->function, Qbyte_code));
|
|
|
2939 btp = btp->next)
|
|
|
2940 {}
|
|
|
2941 /* btp now points at the frame of the innermost function
|
|
|
2942 that DOES eval its args.
|
|
|
2943 If it is a built-in function (such as load or eval-region)
|
|
|
2944 return nil. */
|
|
|
2945 /* Beats me why this is necessary, but it is */
|
|
|
2946 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2947 return Qt;
|
|
|
2948
|
|
|
2949 #endif
|
|
|
2950
|
|
|
2951 fun = Findirect_function (*btp->function);
|
|
|
2952 if (SUBRP (fun))
|
|
|
2953 return Qnil;
|
|
|
2954 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2955 Return t if that function was called interactively. */
|
|
|
2956 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2957 return Qt;
|
|
|
2958 return Qnil;
|
|
|
2959 }
|
|
|
2960
|
|
|
2961
|
|
|
2962 /************************************************************************/
|
|
|
2963 /* Autoloading */
|
|
|
2964 /************************************************************************/
|
|
|
2965
|
|
|
2966 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
444
|
2967 Define FUNCTION to autoload from FILENAME.
|
|
|
2968 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'.
|
|
|
2969 The remaining optional arguments provide additional info about the
|
|
|
2970 real definition.
|
|
|
2971 DOCSTRING is documentation for FUNCTION.
|
|
|
2972 INTERACTIVE, if non-nil, says FUNCTION can be called interactively.
|
|
|
2973 TYPE indicates the type of the object:
|
|
428
|
2974 nil or omitted says FUNCTION is a function,
|
|
|
2975 `keymap' says FUNCTION is really a keymap, and
|
|
|
2976 `macro' or t says FUNCTION is really a macro.
|
|
444
|
2977 If FUNCTION already has a non-void function definition that is not an
|
|
|
2978 autoload object, this function does nothing and returns nil.
|
|
428
|
2979 */
|
|
444
|
2980 (function, filename, docstring, interactive, type))
|
|
428
|
2981 {
|
|
|
2982 /* This function can GC */
|
|
|
2983 CHECK_SYMBOL (function);
|
|
444
|
2984 CHECK_STRING (filename);
|
|
428
|
2985
|
|
|
2986 /* If function is defined and not as an autoload, don't override */
|
|
|
2987 {
|
|
|
2988 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
2989 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
2990 return Qnil;
|
|
|
2991 }
|
|
|
2992
|
|
|
2993 if (purify_flag)
|
|
|
2994 {
|
|
|
2995 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
444
|
2996 filename = Fsymbol_name (Fintern (filename, Qnil));
|
|
428
|
2997 }
|
|
440
|
2998
|
|
444
|
2999 return Ffset (function, Fcons (Qautoload, list4 (filename,
|
|
428
|
3000 docstring,
|
|
|
3001 interactive,
|
|
|
3002 type)));
|
|
|
3003 }
|
|
|
3004
|
|
|
3005 Lisp_Object
|
|
|
3006 un_autoload (Lisp_Object oldqueue)
|
|
|
3007 {
|
|
|
3008 /* This function can GC */
|
|
|
3009 REGISTER Lisp_Object queue, first, second;
|
|
|
3010
|
|
|
3011 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
3012 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
3013 queue = Vautoload_queue;
|
|
|
3014 Vautoload_queue = oldqueue;
|
|
|
3015 while (CONSP (queue))
|
|
|
3016 {
|
|
|
3017 first = XCAR (queue);
|
|
|
3018 second = Fcdr (first);
|
|
|
3019 first = Fcar (first);
|
|
|
3020 if (NILP (second))
|
|
|
3021 Vfeatures = first;
|
|
|
3022 else
|
|
|
3023 Ffset (first, second);
|
|
|
3024 queue = Fcdr (queue);
|
|
|
3025 }
|
|
|
3026 return Qnil;
|
|
|
3027 }
|
|
|
3028
|
|
|
3029 void
|
|
|
3030 do_autoload (Lisp_Object fundef,
|
|
|
3031 Lisp_Object funname)
|
|
|
3032 {
|
|
|
3033 /* This function can GC */
|
|
|
3034 int speccount = specpdl_depth();
|
|
|
3035 Lisp_Object fun = funname;
|
|
|
3036 struct gcpro gcpro1, gcpro2;
|
|
|
3037
|
|
|
3038 CHECK_SYMBOL (funname);
|
|
|
3039 GCPRO2 (fun, funname);
|
|
|
3040
|
|
|
3041 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
3042 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
3043 Vautoload_queue = Qt;
|
|
|
3044 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
|
3045
|
|
|
3046 {
|
|
|
3047 Lisp_Object queue;
|
|
|
3048
|
|
|
3049 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
3050 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
3051 {
|
|
|
3052 Lisp_Object first = XCAR (queue);
|
|
|
3053 Lisp_Object second = Fcdr (first);
|
|
|
3054
|
|
|
3055 first = Fcar (first);
|
|
|
3056
|
|
|
3057 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
3058 may be an atom if the autoload entry was generated by a defalias
|
|
|
3059 or fset. */
|
|
|
3060 if (CONSP (second))
|
|
|
3061 Fput (first, Qautoload, (XCDR (second)));
|
|
|
3062 }
|
|
|
3063 }
|
|
|
3064
|
|
|
3065 /* Once loading finishes, don't undo it. */
|
|
|
3066 Vautoload_queue = Qt;
|
|
|
3067 unbind_to (speccount, Qnil);
|
|
|
3068
|
|
|
3069 fun = indirect_function (fun, 0);
|
|
|
3070
|
|
|
3071 #if 0 /* FSFmacs */
|
|
|
3072 if (!NILP (Fequal (fun, fundef)))
|
|
|
3073 #else
|
|
|
3074 if (UNBOUNDP (fun)
|
|
|
3075 || (CONSP (fun)
|
|
|
3076 && EQ (XCAR (fun), Qautoload)))
|
|
|
3077 #endif
|
|
563
|
3078 invalid_state ("Autoloading failed to define function", funname);
|
|
428
|
3079 UNGCPRO;
|
|
|
3080 }
|
|
|
3081
|
|
|
3082
|
|
|
3083 /************************************************************************/
|
|
|
3084 /* eval, funcall, apply */
|
|
|
3085 /************************************************************************/
|
|
|
3086
|
|
|
3087 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
442
|
3088 int nargs, Lisp_Object args[]);
|
|
428
|
3089 static int in_warnings;
|
|
|
3090
|
|
|
3091 static Lisp_Object
|
|
|
3092 in_warnings_restore (Lisp_Object minimus)
|
|
|
3093 {
|
|
|
3094 in_warnings = 0;
|
|
|
3095 return Qnil;
|
|
|
3096 }
|
|
|
3097
|
|
|
3098 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
|
3099 Evaluate FORM and return its value.
|
|
|
3100 */
|
|
|
3101 (form))
|
|
|
3102 {
|
|
|
3103 /* This function can GC */
|
|
|
3104 Lisp_Object fun, val, original_fun, original_args;
|
|
|
3105 int nargs;
|
|
|
3106 struct backtrace backtrace;
|
|
|
3107
|
|
|
3108 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
3109 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
3110 {
|
|
|
3111 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
3112 int speccount = specpdl_depth();
|
|
|
3113 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
3114
|
|
|
3115 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
3116 in_warnings = 1;
|
|
|
3117 this_warning_cons = Vpending_warnings;
|
|
|
3118 this_warning = XCAR (this_warning_cons);
|
|
|
3119 /* in case an error occurs in the warn function, at least
|
|
|
3120 it won't happen infinitely */
|
|
|
3121 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
3122 free_cons (XCONS (this_warning_cons));
|
|
|
3123 class = XCAR (this_warning);
|
|
|
3124 level = XCAR (XCDR (this_warning));
|
|
|
3125 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
3126 free_list (this_warning);
|
|
|
3127
|
|
|
3128 if (NILP (Vpending_warnings))
|
|
|
3129 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
3130 but safer */
|
|
|
3131
|
|
|
3132 GCPRO4 (form, class, level, messij);
|
|
|
3133 if (!STRINGP (messij))
|
|
|
3134 messij = Fprin1_to_string (messij, Qnil);
|
|
|
3135 call3 (Qdisplay_warning, class, messij, level);
|
|
|
3136 UNGCPRO;
|
|
|
3137 unbind_to (speccount, Qnil);
|
|
|
3138 }
|
|
|
3139
|
|
|
3140 if (!CONSP (form))
|
|
|
3141 {
|
|
|
3142 if (SYMBOLP (form))
|
|
|
3143 return Fsymbol_value (form);
|
|
|
3144 else
|
|
|
3145 return form;
|
|
|
3146 }
|
|
|
3147
|
|
|
3148 QUIT;
|
|
|
3149 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3150 {
|
|
|
3151 struct gcpro gcpro1;
|
|
|
3152 GCPRO1 (form);
|
|
|
3153 garbage_collect_1 ();
|
|
|
3154 UNGCPRO;
|
|
|
3155 }
|
|
|
3156
|
|
|
3157 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3158 {
|
|
|
3159 if (max_lisp_eval_depth < 100)
|
|
|
3160 max_lisp_eval_depth = 100;
|
|
|
3161 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3162 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3163 Qunbound);
|
|
428
|
3164 }
|
|
|
3165
|
|
|
3166 /* We guaranteed CONSP (form) above */
|
|
|
3167 original_fun = XCAR (form);
|
|
|
3168 original_args = XCDR (form);
|
|
|
3169
|
|
|
3170 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
3171
|
|
|
3172 backtrace.pdlcount = specpdl_depth();
|
|
|
3173 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3174 backtrace.args = &original_args;
|
|
|
3175 backtrace.nargs = UNEVALLED;
|
|
|
3176 backtrace.evalargs = 1;
|
|
|
3177 backtrace.debug_on_exit = 0;
|
|
|
3178 PUSH_BACKTRACE (backtrace);
|
|
|
3179
|
|
|
3180 if (debug_on_next_call)
|
|
|
3181 do_debug_on_call (Qt);
|
|
|
3182
|
|
|
3183 if (profiling_active)
|
|
|
3184 profile_increase_call_count (original_fun);
|
|
|
3185
|
|
|
3186 /* At this point, only original_fun and original_args
|
|
|
3187 have values that will be used below. */
|
|
|
3188 retry:
|
|
|
3189 fun = indirect_function (original_fun, 1);
|
|
|
3190
|
|
|
3191 if (SUBRP (fun))
|
|
|
3192 {
|
|
|
3193 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3194 int max_args = subr->max_args;
|
|
|
3195
|
|
|
3196 if (nargs < subr->min_args)
|
|
|
3197 goto wrong_number_of_arguments;
|
|
|
3198
|
|
|
3199 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
|
3200 {
|
|
|
3201 backtrace.evalargs = 0;
|
|
|
3202 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
|
3203 (original_args));
|
|
|
3204 }
|
|
|
3205 else if (nargs <= max_args)
|
|
|
3206 {
|
|
|
3207 struct gcpro gcpro1;
|
|
|
3208 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
3209 REGISTER Lisp_Object *p = args;
|
|
|
3210
|
|
|
3211 GCPRO1 (args[0]);
|
|
|
3212 gcpro1.nvars = 0;
|
|
|
3213
|
|
|
3214 {
|
|
|
3215 LIST_LOOP_2 (arg, original_args)
|
|
|
3216 {
|
|
|
3217 *p++ = Feval (arg);
|
|
|
3218 gcpro1.nvars++;
|
|
|
3219 }
|
|
|
3220 }
|
|
|
3221
|
|
|
3222 /* &optional args default to nil. */
|
|
|
3223 while (p - args < max_args)
|
|
|
3224 *p++ = Qnil;
|
|
|
3225
|
|
|
3226 backtrace.args = args;
|
|
|
3227 backtrace.nargs = nargs;
|
|
|
3228
|
|
|
3229 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3230
|
|
|
3231 UNGCPRO;
|
|
|
3232 }
|
|
|
3233 else if (max_args == MANY)
|
|
|
3234 {
|
|
|
3235 /* Pass a vector of evaluated arguments */
|
|
|
3236 struct gcpro gcpro1;
|
|
|
3237 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3238 REGISTER Lisp_Object *p = args;
|
|
|
3239
|
|
|
3240 GCPRO1 (args[0]);
|
|
|
3241 gcpro1.nvars = 0;
|
|
|
3242
|
|
|
3243 {
|
|
|
3244 LIST_LOOP_2 (arg, original_args)
|
|
|
3245 {
|
|
|
3246 *p++ = Feval (arg);
|
|
|
3247 gcpro1.nvars++;
|
|
|
3248 }
|
|
|
3249 }
|
|
|
3250
|
|
|
3251 backtrace.args = args;
|
|
|
3252 backtrace.nargs = nargs;
|
|
|
3253
|
|
|
3254 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
|
3255 (nargs, args));
|
|
|
3256
|
|
|
3257 UNGCPRO;
|
|
|
3258 }
|
|
|
3259 else
|
|
|
3260 {
|
|
|
3261 wrong_number_of_arguments:
|
|
440
|
3262 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
428
|
3263 }
|
|
|
3264 }
|
|
|
3265 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3266 {
|
|
|
3267 struct gcpro gcpro1;
|
|
|
3268 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3269 REGISTER Lisp_Object *p = args;
|
|
|
3270
|
|
|
3271 GCPRO1 (args[0]);
|
|
|
3272 gcpro1.nvars = 0;
|
|
|
3273
|
|
|
3274 {
|
|
|
3275 LIST_LOOP_2 (arg, original_args)
|
|
|
3276 {
|
|
|
3277 *p++ = Feval (arg);
|
|
|
3278 gcpro1.nvars++;
|
|
|
3279 }
|
|
|
3280 }
|
|
|
3281
|
|
|
3282 backtrace.args = args;
|
|
|
3283 backtrace.nargs = nargs;
|
|
|
3284 backtrace.evalargs = 0;
|
|
|
3285
|
|
|
3286 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3287
|
|
|
3288 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3289 if (backtrace.debug_on_exit)
|
|
|
3290 val = do_debug_on_exit (val);
|
|
|
3291 /* Don't do it again when we return to eval. */
|
|
|
3292 backtrace.debug_on_exit = 0;
|
|
|
3293
|
|
|
3294 UNGCPRO;
|
|
|
3295 }
|
|
|
3296 else if (CONSP (fun))
|
|
|
3297 {
|
|
|
3298 Lisp_Object funcar = XCAR (fun);
|
|
|
3299
|
|
|
3300 if (EQ (funcar, Qautoload))
|
|
|
3301 {
|
|
|
3302 do_autoload (fun, original_fun);
|
|
|
3303 goto retry;
|
|
|
3304 }
|
|
|
3305 else if (EQ (funcar, Qmacro))
|
|
|
3306 {
|
|
|
3307 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3308 }
|
|
|
3309 else if (EQ (funcar, Qlambda))
|
|
|
3310 {
|
|
|
3311 struct gcpro gcpro1;
|
|
|
3312 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3313 REGISTER Lisp_Object *p = args;
|
|
|
3314
|
|
|
3315 GCPRO1 (args[0]);
|
|
|
3316 gcpro1.nvars = 0;
|
|
|
3317
|
|
|
3318 {
|
|
|
3319 LIST_LOOP_2 (arg, original_args)
|
|
|
3320 {
|
|
|
3321 *p++ = Feval (arg);
|
|
|
3322 gcpro1.nvars++;
|
|
|
3323 }
|
|
|
3324 }
|
|
|
3325
|
|
|
3326 UNGCPRO;
|
|
|
3327
|
|
|
3328 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3329 backtrace.nargs = nargs;
|
|
|
3330 backtrace.evalargs = 0;
|
|
|
3331
|
|
|
3332 val = funcall_lambda (fun, nargs, args);
|
|
|
3333
|
|
|
3334 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3335 if (backtrace.debug_on_exit)
|
|
|
3336 val = do_debug_on_exit (val);
|
|
|
3337 /* Don't do it again when we return to eval. */
|
|
|
3338 backtrace.debug_on_exit = 0;
|
|
|
3339 }
|
|
|
3340 else
|
|
|
3341 {
|
|
|
3342 goto invalid_function;
|
|
|
3343 }
|
|
|
3344 }
|
|
|
3345 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3346 {
|
|
|
3347 invalid_function:
|
|
436
|
3348 val = signal_invalid_function_error (fun);
|
|
428
|
3349 }
|
|
|
3350
|
|
|
3351 lisp_eval_depth--;
|
|
|
3352 if (backtrace.debug_on_exit)
|
|
|
3353 val = do_debug_on_exit (val);
|
|
|
3354 POP_BACKTRACE (backtrace);
|
|
|
3355 return val;
|
|
|
3356 }
|
|
|
3357
|
|
|
3358
|
|
|
3359 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3360 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3361 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3362 */
|
|
|
3363 (int nargs, Lisp_Object *args))
|
|
|
3364 {
|
|
|
3365 /* This function can GC */
|
|
|
3366 Lisp_Object fun;
|
|
|
3367 Lisp_Object val;
|
|
|
3368 struct backtrace backtrace;
|
|
|
3369 int fun_nargs = nargs - 1;
|
|
|
3370 Lisp_Object *fun_args = args + 1;
|
|
|
3371
|
|
|
3372 QUIT;
|
|
|
3373 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3374 /* Callers should gcpro lexpr args */
|
|
|
3375 garbage_collect_1 ();
|
|
|
3376
|
|
|
3377 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3378 {
|
|
|
3379 if (max_lisp_eval_depth < 100)
|
|
|
3380 max_lisp_eval_depth = 100;
|
|
|
3381 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
563
|
3382 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'",
|
|
|
3383 Qunbound);
|
|
428
|
3384 }
|
|
|
3385
|
|
|
3386 backtrace.pdlcount = specpdl_depth();
|
|
|
3387 backtrace.function = &args[0];
|
|
|
3388 backtrace.args = fun_args;
|
|
|
3389 backtrace.nargs = fun_nargs;
|
|
|
3390 backtrace.evalargs = 0;
|
|
|
3391 backtrace.debug_on_exit = 0;
|
|
|
3392 PUSH_BACKTRACE (backtrace);
|
|
|
3393
|
|
|
3394 if (debug_on_next_call)
|
|
|
3395 do_debug_on_call (Qlambda);
|
|
|
3396
|
|
|
3397 retry:
|
|
|
3398
|
|
|
3399 fun = args[0];
|
|
|
3400
|
|
|
3401 /* It might be useful to place this *after* all the checks. */
|
|
|
3402 if (profiling_active)
|
|
|
3403 profile_increase_call_count (fun);
|
|
|
3404
|
|
|
3405 /* We could call indirect_function directly, but profiling shows
|
|
|
3406 this is worth optimizing by partially unrolling the loop. */
|
|
|
3407 if (SYMBOLP (fun))
|
|
|
3408 {
|
|
|
3409 fun = XSYMBOL (fun)->function;
|
|
|
3410 if (SYMBOLP (fun))
|
|
|
3411 {
|
|
|
3412 fun = XSYMBOL (fun)->function;
|
|
|
3413 if (SYMBOLP (fun))
|
|
|
3414 fun = indirect_function (fun, 1);
|
|
|
3415 }
|
|
|
3416 }
|
|
|
3417
|
|
|
3418 if (SUBRP (fun))
|
|
|
3419 {
|
|
|
3420 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3421 int max_args = subr->max_args;
|
|
|
3422 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3423
|
|
|
3424 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
|
3425 {
|
|
|
3426 funcall_subr:
|
|
|
3427 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
|
3428 }
|
|
436
|
3429 else if (fun_nargs < subr->min_args)
|
|
|
3430 {
|
|
|
3431 goto wrong_number_of_arguments;
|
|
|
3432 }
|
|
428
|
3433 else if (fun_nargs < max_args)
|
|
|
3434 {
|
|
|
3435 Lisp_Object *p = spacious_args;
|
|
|
3436
|
|
|
3437 /* Default optionals to nil */
|
|
|
3438 while (fun_nargs--)
|
|
|
3439 *p++ = *fun_args++;
|
|
|
3440 while (p - spacious_args < max_args)
|
|
|
3441 *p++ = Qnil;
|
|
|
3442
|
|
|
3443 fun_args = spacious_args;
|
|
|
3444 goto funcall_subr;
|
|
|
3445 }
|
|
|
3446 else if (max_args == MANY)
|
|
|
3447 {
|
|
436
|
3448 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
428
|
3449 }
|
|
|
3450 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3451 {
|
|
|
3452 goto invalid_function;
|
|
|
3453 }
|
|
|
3454 else
|
|
|
3455 {
|
|
|
3456 wrong_number_of_arguments:
|
|
436
|
3457 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
428
|
3458 }
|
|
|
3459 }
|
|
|
3460 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3461 {
|
|
|
3462 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
|
3463 }
|
|
|
3464 else if (CONSP (fun))
|
|
|
3465 {
|
|
|
3466 Lisp_Object funcar = XCAR (fun);
|
|
|
3467
|
|
|
3468 if (EQ (funcar, Qlambda))
|
|
|
3469 {
|
|
|
3470 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3471 }
|
|
|
3472 else if (EQ (funcar, Qautoload))
|
|
|
3473 {
|
|
|
3474 do_autoload (fun, args[0]);
|
|
|
3475 goto retry;
|
|
|
3476 }
|
|
|
3477 else /* Can't funcall a macro */
|
|
|
3478 {
|
|
|
3479 goto invalid_function;
|
|
|
3480 }
|
|
|
3481 }
|
|
|
3482 else if (UNBOUNDP (fun))
|
|
|
3483 {
|
|
436
|
3484 val = signal_void_function_error (args[0]);
|
|
428
|
3485 }
|
|
|
3486 else
|
|
|
3487 {
|
|
|
3488 invalid_function:
|
|
436
|
3489 val = signal_invalid_function_error (fun);
|
|
428
|
3490 }
|
|
|
3491
|
|
|
3492 lisp_eval_depth--;
|
|
|
3493 if (backtrace.debug_on_exit)
|
|
|
3494 val = do_debug_on_exit (val);
|
|
|
3495 POP_BACKTRACE (backtrace);
|
|
|
3496 return val;
|
|
|
3497 }
|
|
|
3498
|
|
|
3499 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3500 Return t if OBJECT can be called as a function, else nil.
|
|
|
3501 A function is an object that can be applied to arguments,
|
|
|
3502 using for example `funcall' or `apply'.
|
|
|
3503 */
|
|
|
3504 (object))
|
|
|
3505 {
|
|
|
3506 if (SYMBOLP (object))
|
|
|
3507 object = indirect_function (object, 0);
|
|
|
3508
|
|
|
3509 return
|
|
|
3510 (SUBRP (object) ||
|
|
|
3511 COMPILED_FUNCTIONP (object) ||
|
|
|
3512 (CONSP (object) &&
|
|
|
3513 (EQ (XCAR (object), Qlambda) ||
|
|
|
3514 EQ (XCAR (object), Qautoload))))
|
|
|
3515 ? Qt : Qnil;
|
|
|
3516 }
|
|
|
3517
|
|
|
3518 static Lisp_Object
|
|
|
3519 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
|
3520 {
|
|
|
3521 Lisp_Object orig_function = function;
|
|
|
3522 Lisp_Object arglist;
|
|
|
3523
|
|
|
3524 retry:
|
|
|
3525
|
|
|
3526 if (SYMBOLP (function))
|
|
|
3527 function = indirect_function (function, 1);
|
|
|
3528
|
|
|
3529 if (SUBRP (function))
|
|
|
3530 {
|
|
442
|
3531 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
3532 if (function_min_args_p)
|
|
|
3533 return Fsubr_min_args (function);
|
|
|
3534 else
|
|
|
3535 return Fsubr_max_args (function);
|
|
428
|
3536 }
|
|
|
3537 else if (COMPILED_FUNCTIONP (function))
|
|
|
3538 {
|
|
|
3539 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
|
3540 }
|
|
|
3541 else if (CONSP (function))
|
|
|
3542 {
|
|
|
3543 Lisp_Object funcar = XCAR (function);
|
|
|
3544
|
|
|
3545 if (EQ (funcar, Qmacro))
|
|
|
3546 {
|
|
|
3547 function = XCDR (function);
|
|
|
3548 goto retry;
|
|
|
3549 }
|
|
|
3550 else if (EQ (funcar, Qautoload))
|
|
|
3551 {
|
|
442
|
3552 struct gcpro gcpro1;
|
|
|
3553
|
|
|
3554 GCPRO1 (function);
|
|
428
|
3555 do_autoload (function, orig_function);
|
|
442
|
3556 UNGCPRO;
|
|
|
3557 function = orig_function;
|
|
428
|
3558 goto retry;
|
|
|
3559 }
|
|
|
3560 else if (EQ (funcar, Qlambda))
|
|
|
3561 {
|
|
|
3562 arglist = Fcar (XCDR (function));
|
|
|
3563 }
|
|
|
3564 else
|
|
|
3565 {
|
|
|
3566 goto invalid_function;
|
|
|
3567 }
|
|
|
3568 }
|
|
|
3569 else
|
|
|
3570 {
|
|
|
3571 invalid_function:
|
|
442
|
3572 return signal_invalid_function_error (orig_function);
|
|
428
|
3573 }
|
|
|
3574
|
|
|
3575 {
|
|
|
3576 int argcount = 0;
|
|
|
3577
|
|
|
3578 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3579 {
|
|
|
3580 if (EQ (arg, Qand_optional))
|
|
|
3581 {
|
|
|
3582 if (function_min_args_p)
|
|
|
3583 break;
|
|
|
3584 }
|
|
|
3585 else if (EQ (arg, Qand_rest))
|
|
|
3586 {
|
|
|
3587 if (function_min_args_p)
|
|
|
3588 break;
|
|
|
3589 else
|
|
|
3590 return Qnil;
|
|
|
3591 }
|
|
|
3592 else
|
|
|
3593 {
|
|
|
3594 argcount++;
|
|
|
3595 }
|
|
|
3596 }
|
|
|
3597
|
|
|
3598 return make_int (argcount);
|
|
|
3599 }
|
|
|
3600 }
|
|
|
3601
|
|
|
3602 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3603 Return the number of arguments a function may be called with.
|
|
|
3604 The function may be any form that can be passed to `funcall',
|
|
|
3605 any special form, or any macro.
|
|
|
3606 */
|
|
|
3607 (function))
|
|
|
3608 {
|
|
|
3609 return function_argcount (function, 1);
|
|
|
3610 }
|
|
|
3611
|
|
|
3612 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3613 Return the number of arguments a function may be called with.
|
|
|
3614 The function may be any form that can be passed to `funcall',
|
|
|
3615 any special form, or any macro.
|
|
|
3616 If the function takes an arbitrary number of arguments or is
|
|
|
3617 a built-in special form, nil is returned.
|
|
|
3618 */
|
|
|
3619 (function))
|
|
|
3620 {
|
|
|
3621 return function_argcount (function, 0);
|
|
|
3622 }
|
|
|
3623
|
|
|
3624
|
|
|
3625 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
|
3626 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
|
3627 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
|
3628 */
|
|
|
3629 (int nargs, Lisp_Object *args))
|
|
|
3630 {
|
|
|
3631 /* This function can GC */
|
|
|
3632 Lisp_Object fun = args[0];
|
|
|
3633 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3634 int numargs;
|
|
|
3635 int funcall_nargs;
|
|
|
3636
|
|
|
3637 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
|
3638
|
|
|
3639 if (numargs == 0)
|
|
|
3640 /* (apply foo 0 1 '()) */
|
|
|
3641 return Ffuncall (nargs - 1, args);
|
|
|
3642 else if (numargs == 1)
|
|
|
3643 {
|
|
|
3644 /* (apply foo 0 1 '(2)) */
|
|
|
3645 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3646 return Ffuncall (nargs, args);
|
|
|
3647 }
|
|
|
3648
|
|
|
3649 /* -1 for function, -1 for spread arg */
|
|
|
3650 numargs = nargs - 2 + numargs;
|
|
|
3651 /* +1 for function */
|
|
|
3652 funcall_nargs = 1 + numargs;
|
|
|
3653
|
|
|
3654 if (SYMBOLP (fun))
|
|
|
3655 fun = indirect_function (fun, 0);
|
|
|
3656
|
|
|
3657 if (SUBRP (fun))
|
|
|
3658 {
|
|
|
3659 Lisp_Subr *subr = XSUBR (fun);
|
|
|
3660 int max_args = subr->max_args;
|
|
|
3661
|
|
|
3662 if (numargs < subr->min_args
|
|
|
3663 || (max_args >= 0 && max_args < numargs))
|
|
|
3664 {
|
|
|
3665 /* Let funcall get the error */
|
|
|
3666 }
|
|
|
3667 else if (max_args > numargs)
|
|
|
3668 {
|
|
|
3669 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3670 by explicitly supplying nil's for optional values */
|
|
|
3671 funcall_nargs += (max_args - numargs);
|
|
|
3672 }
|
|
|
3673 }
|
|
|
3674 else if (UNBOUNDP (fun))
|
|
|
3675 {
|
|
|
3676 /* Let funcall get the error */
|
|
|
3677 fun = args[0];
|
|
|
3678 }
|
|
|
3679
|
|
|
3680 {
|
|
|
3681 REGISTER int i;
|
|
|
3682 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
|
3683 struct gcpro gcpro1;
|
|
|
3684
|
|
|
3685 GCPRO1 (*funcall_args);
|
|
|
3686 gcpro1.nvars = funcall_nargs;
|
|
|
3687
|
|
|
3688 /* Copy in the unspread args */
|
|
|
3689 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3690 /* Spread the last arg we got. Its first element goes in
|
|
|
3691 the slot that it used to occupy, hence this value of I. */
|
|
|
3692 for (i = nargs - 1;
|
|
|
3693 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3694 i++, spread_arg = XCDR (spread_arg))
|
|
|
3695 {
|
|
|
3696 funcall_args [i] = XCAR (spread_arg);
|
|
|
3697 }
|
|
|
3698 /* Supply nil for optional args (to subrs) */
|
|
|
3699 for (; i < funcall_nargs; i++)
|
|
|
3700 funcall_args[i] = Qnil;
|
|
|
3701
|
|
|
3702
|
|
|
3703 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3704 }
|
|
|
3705 }
|
|
|
3706
|
|
|
3707
|
|
|
3708 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3709 return the result of evaluation. */
|
|
|
3710
|
|
|
3711 static Lisp_Object
|
|
|
3712 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
|
3713 {
|
|
|
3714 /* This function can GC */
|
|
442
|
3715 Lisp_Object arglist, body, tail;
|
|
428
|
3716 int speccount = specpdl_depth();
|
|
|
3717 REGISTER int i = 0;
|
|
|
3718
|
|
|
3719 tail = XCDR (fun);
|
|
|
3720
|
|
|
3721 if (!CONSP (tail))
|
|
|
3722 goto invalid_function;
|
|
|
3723
|
|
|
3724 arglist = XCAR (tail);
|
|
|
3725 body = XCDR (tail);
|
|
|
3726
|
|
|
3727 {
|
|
|
3728 int optional = 0, rest = 0;
|
|
|
3729
|
|
442
|
3730 EXTERNAL_LIST_LOOP_2 (symbol, arglist)
|
|
428
|
3731 {
|
|
|
3732 if (!SYMBOLP (symbol))
|
|
|
3733 goto invalid_function;
|
|
|
3734 if (EQ (symbol, Qand_rest))
|
|
|
3735 rest = 1;
|
|
|
3736 else if (EQ (symbol, Qand_optional))
|
|
|
3737 optional = 1;
|
|
|
3738 else if (rest)
|
|
|
3739 {
|
|
|
3740 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3741 i = nargs;
|
|
|
3742 }
|
|
|
3743 else if (i < nargs)
|
|
|
3744 specbind (symbol, args[i++]);
|
|
|
3745 else if (!optional)
|
|
|
3746 goto wrong_number_of_arguments;
|
|
|
3747 else
|
|
|
3748 specbind (symbol, Qnil);
|
|
|
3749 }
|
|
|
3750 }
|
|
|
3751
|
|
|
3752 if (i < nargs)
|
|
|
3753 goto wrong_number_of_arguments;
|
|
|
3754
|
|
|
3755 return unbind_to (speccount, Fprogn (body));
|
|
|
3756
|
|
|
3757 wrong_number_of_arguments:
|
|
436
|
3758 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
428
|
3759
|
|
|
3760 invalid_function:
|
|
436
|
3761 return signal_invalid_function_error (fun);
|
|
428
|
3762 }
|
|
|
3763
|
|
|
3764
|
|
|
3765 /************************************************************************/
|
|
|
3766 /* Run hook variables in various ways. */
|
|
|
3767 /************************************************************************/
|
|
|
3768
|
|
|
3769 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
|
3770 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3771 Each argument should be a symbol, a hook variable.
|
|
|
3772 These symbols are processed in the order specified.
|
|
|
3773 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3774 or a list of functions to be called to run the hook.
|
|
|
3775 If the value is a function, it is called with no arguments.
|
|
|
3776 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3777
|
|
|
3778 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3779 not `make-local-variable'.
|
|
|
3780 */
|
|
|
3781 (int nargs, Lisp_Object *args))
|
|
|
3782 {
|
|
|
3783 REGISTER int i;
|
|
|
3784
|
|
|
3785 for (i = 0; i < nargs; i++)
|
|
|
3786 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
|
3787
|
|
|
3788 return Qnil;
|
|
|
3789 }
|
|
|
3790
|
|
|
3791 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
|
3792 Run HOOK with the specified arguments ARGS.
|
|
|
3793 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3794 value, that value may be a function or a list of functions to be
|
|
|
3795 called to run the hook. If the value is a function, it is called with
|
|
|
3796 the given arguments and its return value is returned. If it is a list
|
|
|
3797 of functions, those functions are called, in order,
|
|
|
3798 with the given arguments ARGS.
|
|
444
|
3799 It is best not to depend on the value returned by `run-hook-with-args',
|
|
428
|
3800 as that may change.
|
|
|
3801
|
|
|
3802 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3803 not `make-local-variable'.
|
|
|
3804 */
|
|
|
3805 (int nargs, Lisp_Object *args))
|
|
|
3806 {
|
|
|
3807 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3808 }
|
|
|
3809
|
|
|
3810 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
|
3811 Run HOOK with the specified arguments ARGS.
|
|
|
3812 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3813 be a list of functions. We call those functions, one by one,
|
|
|
3814 passing arguments ARGS to each of them, until one of them
|
|
|
3815 returns a non-nil value. Then we return that value.
|
|
|
3816 If all the functions return nil, we return nil.
|
|
|
3817
|
|
|
3818 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3819 not `make-local-variable'.
|
|
|
3820 */
|
|
|
3821 (int nargs, Lisp_Object *args))
|
|
|
3822 {
|
|
|
3823 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3824 }
|
|
|
3825
|
|
|
3826 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
|
3827 Run HOOK with the specified arguments ARGS.
|
|
|
3828 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3829 be a list of functions. We call those functions, one by one,
|
|
|
3830 passing arguments ARGS to each of them, until one of them
|
|
|
3831 returns nil. Then we return nil.
|
|
|
3832 If all the functions return non-nil, we return non-nil.
|
|
|
3833
|
|
|
3834 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3835 not `make-local-variable'.
|
|
|
3836 */
|
|
|
3837 (int nargs, Lisp_Object *args))
|
|
|
3838 {
|
|
|
3839 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3840 }
|
|
|
3841
|
|
|
3842 /* ARGS[0] should be a hook symbol.
|
|
|
3843 Call each of the functions in the hook value, passing each of them
|
|
|
3844 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3845 COND specifies a condition to test after each call
|
|
|
3846 to decide whether to stop.
|
|
|
3847 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3848 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3849
|
|
|
3850 Lisp_Object
|
|
|
3851 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3852 enum run_hooks_condition cond)
|
|
|
3853 {
|
|
|
3854 Lisp_Object sym, val, ret;
|
|
|
3855
|
|
|
3856 if (!initialized || preparing_for_armageddon)
|
|
|
3857 /* We need to bail out of here pronto. */
|
|
|
3858 return Qnil;
|
|
|
3859
|
|
|
3860 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3861 will also be true unless something is really hosed. */
|
|
|
3862 assert (!gc_in_progress);
|
|
|
3863
|
|
|
3864 sym = args[0];
|
|
|
3865 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3866 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3867
|
|
|
3868 if (UNBOUNDP (val) || NILP (val))
|
|
|
3869 return ret;
|
|
|
3870 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3871 {
|
|
|
3872 args[0] = val;
|
|
|
3873 return Ffuncall (nargs, args);
|
|
|
3874 }
|
|
|
3875 else
|
|
|
3876 {
|
|
|
3877 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3878 Lisp_Object globals = Qnil;
|
|
|
3879 GCPRO3 (sym, val, globals);
|
|
|
3880
|
|
|
3881 for (;
|
|
|
3882 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3883 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3884 : !NILP (ret)));
|
|
|
3885 val = XCDR (val))
|
|
|
3886 {
|
|
|
3887 if (EQ (XCAR (val), Qt))
|
|
|
3888 {
|
|
|
3889 /* t indicates this hook has a local binding;
|
|
|
3890 it means to run the global binding too. */
|
|
|
3891 globals = Fdefault_value (sym);
|
|
|
3892
|
|
|
3893 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3894 ! NILP (globals))
|
|
|
3895 {
|
|
|
3896 args[0] = globals;
|
|
|
3897 ret = Ffuncall (nargs, args);
|
|
|
3898 }
|
|
|
3899 else
|
|
|
3900 {
|
|
|
3901 for (;
|
|
|
3902 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3903 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3904 ? NILP (ret)
|
|
|
3905 : !NILP (ret)));
|
|
|
3906 globals = XCDR (globals))
|
|
|
3907 {
|
|
|
3908 args[0] = XCAR (globals);
|
|
|
3909 /* In a global value, t should not occur. If it does, we
|
|
|
3910 must ignore it to avoid an endless loop. */
|
|
|
3911 if (!EQ (args[0], Qt))
|
|
|
3912 ret = Ffuncall (nargs, args);
|
|
|
3913 }
|
|
|
3914 }
|
|
|
3915 }
|
|
|
3916 else
|
|
|
3917 {
|
|
|
3918 args[0] = XCAR (val);
|
|
|
3919 ret = Ffuncall (nargs, args);
|
|
|
3920 }
|
|
|
3921 }
|
|
|
3922
|
|
|
3923 UNGCPRO;
|
|
|
3924 return ret;
|
|
|
3925 }
|
|
|
3926 }
|
|
|
3927
|
|
|
3928 Lisp_Object
|
|
|
3929 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3930 enum run_hooks_condition cond)
|
|
|
3931 {
|
|
|
3932 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3933 }
|
|
|
3934
|
|
|
3935 #if 0
|
|
|
3936
|
|
|
3937 /* From FSF 19.30, not currently used */
|
|
|
3938
|
|
|
3939 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3940 present value of that symbol.
|
|
|
3941 Call each element of FUNLIST,
|
|
|
3942 passing each of them the rest of ARGS.
|
|
|
3943 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3944 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3945
|
|
|
3946 Lisp_Object
|
|
|
3947 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3948 {
|
|
|
3949 Lisp_Object sym = args[0];
|
|
|
3950 Lisp_Object val;
|
|
|
3951 struct gcpro gcpro1, gcpro2;
|
|
|
3952
|
|
|
3953 GCPRO2 (sym, val);
|
|
|
3954
|
|
|
3955 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3956 {
|
|
|
3957 if (EQ (XCAR (val), Qt))
|
|
|
3958 {
|
|
|
3959 /* t indicates this hook has a local binding;
|
|
|
3960 it means to run the global binding too. */
|
|
|
3961 Lisp_Object globals;
|
|
|
3962
|
|
|
3963 for (globals = Fdefault_value (sym);
|
|
|
3964 CONSP (globals);
|
|
|
3965 globals = XCDR (globals))
|
|
|
3966 {
|
|
|
3967 args[0] = XCAR (globals);
|
|
|
3968 /* In a global value, t should not occur. If it does, we
|
|
|
3969 must ignore it to avoid an endless loop. */
|
|
|
3970 if (!EQ (args[0], Qt))
|
|
|
3971 Ffuncall (nargs, args);
|
|
|
3972 }
|
|
|
3973 }
|
|
|
3974 else
|
|
|
3975 {
|
|
|
3976 args[0] = XCAR (val);
|
|
|
3977 Ffuncall (nargs, args);
|
|
|
3978 }
|
|
|
3979 }
|
|
|
3980 UNGCPRO;
|
|
|
3981 return Qnil;
|
|
|
3982 }
|
|
|
3983
|
|
|
3984 #endif /* 0 */
|
|
|
3985
|
|
|
3986 void
|
|
|
3987 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3988 {
|
|
|
3989 /* This function can GC */
|
|
|
3990 struct gcpro gcpro1;
|
|
|
3991 int i;
|
|
|
3992 va_list vargs;
|
|
|
3993 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
3994
|
|
|
3995 va_start (vargs, nargs);
|
|
|
3996 funcall_args[0] = hook_var;
|
|
|
3997 for (i = 0; i < nargs; i++)
|
|
|
3998 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3999 va_end (vargs);
|
|
|
4000
|
|
|
4001 GCPRO1 (*funcall_args);
|
|
|
4002 gcpro1.nvars = nargs + 1;
|
|
|
4003 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
4004 UNGCPRO;
|
|
|
4005 }
|
|
|
4006
|
|
|
4007 void
|
|
|
4008 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
4009 int nargs, ...)
|
|
|
4010 {
|
|
|
4011 /* This function can GC */
|
|
|
4012 struct gcpro gcpro1;
|
|
|
4013 int i;
|
|
|
4014 va_list vargs;
|
|
|
4015 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
|
4016
|
|
|
4017 va_start (vargs, nargs);
|
|
|
4018 funcall_args[0] = hook_var;
|
|
|
4019 for (i = 0; i < nargs; i++)
|
|
|
4020 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
4021 va_end (vargs);
|
|
|
4022
|
|
|
4023 GCPRO1 (*funcall_args);
|
|
|
4024 gcpro1.nvars = nargs + 1;
|
|
|
4025 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
4026 RUN_HOOKS_TO_COMPLETION);
|
|
|
4027 UNGCPRO;
|
|
|
4028 }
|
|
|
4029
|
|
|
4030 Lisp_Object
|
|
|
4031 run_hook (Lisp_Object hook)
|
|
|
4032 {
|
|
|
4033 Frun_hooks (1, &hook);
|
|
|
4034 return Qnil;
|
|
|
4035 }
|
|
|
4036
|
|
|
4037
|
|
|
4038 /************************************************************************/
|
|
|
4039 /* Front-ends to eval, funcall, apply */
|
|
|
4040 /************************************************************************/
|
|
|
4041
|
|
|
4042 /* Apply fn to arg */
|
|
|
4043 Lisp_Object
|
|
|
4044 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
4045 {
|
|
|
4046 /* This function can GC */
|
|
|
4047 struct gcpro gcpro1;
|
|
|
4048 Lisp_Object args[2];
|
|
|
4049
|
|
|
4050 if (NILP (arg))
|
|
|
4051 return Ffuncall (1, &fn);
|
|
|
4052 GCPRO1 (args[0]);
|
|
|
4053 gcpro1.nvars = 2;
|
|
|
4054 args[0] = fn;
|
|
|
4055 args[1] = arg;
|
|
|
4056 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
4057 }
|
|
|
4058
|
|
|
4059 /* Call function fn on no arguments */
|
|
|
4060 Lisp_Object
|
|
|
4061 call0 (Lisp_Object fn)
|
|
|
4062 {
|
|
|
4063 /* This function can GC */
|
|
|
4064 struct gcpro gcpro1;
|
|
|
4065
|
|
|
4066 GCPRO1 (fn);
|
|
|
4067 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
4068 }
|
|
|
4069
|
|
|
4070 /* Call function fn with argument arg0 */
|
|
|
4071 Lisp_Object
|
|
|
4072 call1 (Lisp_Object fn,
|
|
|
4073 Lisp_Object arg0)
|
|
|
4074 {
|
|
|
4075 /* This function can GC */
|
|
|
4076 struct gcpro gcpro1;
|
|
|
4077 Lisp_Object args[2];
|
|
|
4078 args[0] = fn;
|
|
|
4079 args[1] = arg0;
|
|
|
4080 GCPRO1 (args[0]);
|
|
|
4081 gcpro1.nvars = 2;
|
|
|
4082 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
4083 }
|
|
|
4084
|
|
|
4085 /* Call function fn with arguments arg0, arg1 */
|
|
|
4086 Lisp_Object
|
|
|
4087 call2 (Lisp_Object fn,
|
|
|
4088 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4089 {
|
|
|
4090 /* This function can GC */
|
|
|
4091 struct gcpro gcpro1;
|
|
|
4092 Lisp_Object args[3];
|
|
|
4093 args[0] = fn;
|
|
|
4094 args[1] = arg0;
|
|
|
4095 args[2] = arg1;
|
|
|
4096 GCPRO1 (args[0]);
|
|
|
4097 gcpro1.nvars = 3;
|
|
|
4098 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4099 }
|
|
|
4100
|
|
|
4101 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4102 Lisp_Object
|
|
|
4103 call3 (Lisp_Object fn,
|
|
|
4104 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4105 {
|
|
|
4106 /* This function can GC */
|
|
|
4107 struct gcpro gcpro1;
|
|
|
4108 Lisp_Object args[4];
|
|
|
4109 args[0] = fn;
|
|
|
4110 args[1] = arg0;
|
|
|
4111 args[2] = arg1;
|
|
|
4112 args[3] = arg2;
|
|
|
4113 GCPRO1 (args[0]);
|
|
|
4114 gcpro1.nvars = 4;
|
|
|
4115 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4116 }
|
|
|
4117
|
|
|
4118 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4119 Lisp_Object
|
|
|
4120 call4 (Lisp_Object fn,
|
|
|
4121 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4122 Lisp_Object arg3)
|
|
|
4123 {
|
|
|
4124 /* This function can GC */
|
|
|
4125 struct gcpro gcpro1;
|
|
|
4126 Lisp_Object args[5];
|
|
|
4127 args[0] = fn;
|
|
|
4128 args[1] = arg0;
|
|
|
4129 args[2] = arg1;
|
|
|
4130 args[3] = arg2;
|
|
|
4131 args[4] = arg3;
|
|
|
4132 GCPRO1 (args[0]);
|
|
|
4133 gcpro1.nvars = 5;
|
|
|
4134 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4135 }
|
|
|
4136
|
|
|
4137 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4138 Lisp_Object
|
|
|
4139 call5 (Lisp_Object fn,
|
|
|
4140 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4141 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4142 {
|
|
|
4143 /* This function can GC */
|
|
|
4144 struct gcpro gcpro1;
|
|
|
4145 Lisp_Object args[6];
|
|
|
4146 args[0] = fn;
|
|
|
4147 args[1] = arg0;
|
|
|
4148 args[2] = arg1;
|
|
|
4149 args[3] = arg2;
|
|
|
4150 args[4] = arg3;
|
|
|
4151 args[5] = arg4;
|
|
|
4152 GCPRO1 (args[0]);
|
|
|
4153 gcpro1.nvars = 6;
|
|
|
4154 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4155 }
|
|
|
4156
|
|
|
4157 Lisp_Object
|
|
|
4158 call6 (Lisp_Object fn,
|
|
|
4159 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4160 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4161 {
|
|
|
4162 /* This function can GC */
|
|
|
4163 struct gcpro gcpro1;
|
|
|
4164 Lisp_Object args[7];
|
|
|
4165 args[0] = fn;
|
|
|
4166 args[1] = arg0;
|
|
|
4167 args[2] = arg1;
|
|
|
4168 args[3] = arg2;
|
|
|
4169 args[4] = arg3;
|
|
|
4170 args[5] = arg4;
|
|
|
4171 args[6] = arg5;
|
|
|
4172 GCPRO1 (args[0]);
|
|
|
4173 gcpro1.nvars = 7;
|
|
|
4174 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4175 }
|
|
|
4176
|
|
|
4177 Lisp_Object
|
|
|
4178 call7 (Lisp_Object fn,
|
|
|
4179 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4180 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4181 Lisp_Object arg6)
|
|
|
4182 {
|
|
|
4183 /* This function can GC */
|
|
|
4184 struct gcpro gcpro1;
|
|
|
4185 Lisp_Object args[8];
|
|
|
4186 args[0] = fn;
|
|
|
4187 args[1] = arg0;
|
|
|
4188 args[2] = arg1;
|
|
|
4189 args[3] = arg2;
|
|
|
4190 args[4] = arg3;
|
|
|
4191 args[5] = arg4;
|
|
|
4192 args[6] = arg5;
|
|
|
4193 args[7] = arg6;
|
|
|
4194 GCPRO1 (args[0]);
|
|
|
4195 gcpro1.nvars = 8;
|
|
|
4196 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4197 }
|
|
|
4198
|
|
|
4199 Lisp_Object
|
|
|
4200 call8 (Lisp_Object fn,
|
|
|
4201 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4202 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4203 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4204 {
|
|
|
4205 /* This function can GC */
|
|
|
4206 struct gcpro gcpro1;
|
|
|
4207 Lisp_Object args[9];
|
|
|
4208 args[0] = fn;
|
|
|
4209 args[1] = arg0;
|
|
|
4210 args[2] = arg1;
|
|
|
4211 args[3] = arg2;
|
|
|
4212 args[4] = arg3;
|
|
|
4213 args[5] = arg4;
|
|
|
4214 args[6] = arg5;
|
|
|
4215 args[7] = arg6;
|
|
|
4216 args[8] = arg7;
|
|
|
4217 GCPRO1 (args[0]);
|
|
|
4218 gcpro1.nvars = 9;
|
|
|
4219 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4220 }
|
|
|
4221
|
|
|
4222 Lisp_Object
|
|
|
4223 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4224 {
|
|
|
4225 if (current_buffer == buf)
|
|
|
4226 return call0 (fn);
|
|
|
4227 else
|
|
|
4228 {
|
|
|
4229 Lisp_Object val;
|
|
|
4230 int speccount = specpdl_depth();
|
|
|
4231 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4232 set_buffer_internal (buf);
|
|
|
4233 val = call0 (fn);
|
|
|
4234 unbind_to (speccount, Qnil);
|
|
|
4235 return val;
|
|
|
4236 }
|
|
|
4237 }
|
|
|
4238
|
|
|
4239 Lisp_Object
|
|
|
4240 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4241 Lisp_Object arg0)
|
|
|
4242 {
|
|
|
4243 if (current_buffer == buf)
|
|
|
4244 return call1 (fn, arg0);
|
|
|
4245 else
|
|
|
4246 {
|
|
|
4247 Lisp_Object val;
|
|
|
4248 int speccount = specpdl_depth();
|
|
|
4249 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4250 set_buffer_internal (buf);
|
|
|
4251 val = call1 (fn, arg0);
|
|
|
4252 unbind_to (speccount, Qnil);
|
|
|
4253 return val;
|
|
|
4254 }
|
|
|
4255 }
|
|
|
4256
|
|
|
4257 Lisp_Object
|
|
|
4258 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4259 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4260 {
|
|
|
4261 if (current_buffer == buf)
|
|
|
4262 return call2 (fn, arg0, arg1);
|
|
|
4263 else
|
|
|
4264 {
|
|
|
4265 Lisp_Object val;
|
|
|
4266 int speccount = specpdl_depth();
|
|
|
4267 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4268 set_buffer_internal (buf);
|
|
|
4269 val = call2 (fn, arg0, arg1);
|
|
|
4270 unbind_to (speccount, Qnil);
|
|
|
4271 return val;
|
|
|
4272 }
|
|
|
4273 }
|
|
|
4274
|
|
|
4275 Lisp_Object
|
|
|
4276 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4277 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4278 {
|
|
|
4279 if (current_buffer == buf)
|
|
|
4280 return call3 (fn, arg0, arg1, arg2);
|
|
|
4281 else
|
|
|
4282 {
|
|
|
4283 Lisp_Object val;
|
|
|
4284 int speccount = specpdl_depth();
|
|
|
4285 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4286 set_buffer_internal (buf);
|
|
|
4287 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4288 unbind_to (speccount, Qnil);
|
|
|
4289 return val;
|
|
|
4290 }
|
|
|
4291 }
|
|
|
4292
|
|
|
4293 Lisp_Object
|
|
|
4294 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4295 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4296 Lisp_Object arg3)
|
|
|
4297 {
|
|
|
4298 if (current_buffer == buf)
|
|
|
4299 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4300 else
|
|
|
4301 {
|
|
|
4302 Lisp_Object val;
|
|
|
4303 int speccount = specpdl_depth();
|
|
|
4304 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4305 set_buffer_internal (buf);
|
|
|
4306 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4307 unbind_to (speccount, Qnil);
|
|
|
4308 return val;
|
|
|
4309 }
|
|
|
4310 }
|
|
|
4311
|
|
|
4312 Lisp_Object
|
|
|
4313 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4314 {
|
|
|
4315 if (current_buffer == buf)
|
|
|
4316 return Feval (form);
|
|
|
4317 else
|
|
|
4318 {
|
|
|
4319 Lisp_Object val;
|
|
|
4320 int speccount = specpdl_depth();
|
|
|
4321 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4322 set_buffer_internal (buf);
|
|
|
4323 val = Feval (form);
|
|
|
4324 unbind_to (speccount, Qnil);
|
|
|
4325 return val;
|
|
|
4326 }
|
|
|
4327 }
|
|
|
4328
|
|
|
4329
|
|
|
4330 /************************************************************************/
|
|
|
4331 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4332 /************************************************************************/
|
|
|
4333
|
|
|
4334 /* Call function fn on no arguments, with condition handler */
|
|
|
4335 Lisp_Object
|
|
|
4336 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4337 {
|
|
|
4338 /* This function can GC */
|
|
|
4339 struct gcpro gcpro1;
|
|
|
4340 Lisp_Object args[2];
|
|
|
4341 args[0] = handler;
|
|
|
4342 args[1] = fn;
|
|
|
4343 GCPRO1 (args[0]);
|
|
|
4344 gcpro1.nvars = 2;
|
|
|
4345 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4346 }
|
|
|
4347
|
|
|
4348 /* Call function fn with argument arg0, with condition handler */
|
|
|
4349 Lisp_Object
|
|
|
4350 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4351 Lisp_Object arg0)
|
|
|
4352 {
|
|
|
4353 /* This function can GC */
|
|
|
4354 struct gcpro gcpro1;
|
|
|
4355 Lisp_Object args[3];
|
|
|
4356 args[0] = handler;
|
|
|
4357 args[1] = fn;
|
|
|
4358 args[2] = arg0;
|
|
|
4359 GCPRO1 (args[0]);
|
|
|
4360 gcpro1.nvars = 3;
|
|
|
4361 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4362 }
|
|
|
4363
|
|
|
4364
|
|
|
4365 /* The following functions provide you with error-trapping versions
|
|
|
4366 of the various front-ends above. They take an additional
|
|
|
4367 "warning_string" argument; if non-zero, a warning with this
|
|
|
4368 string and the actual error that occurred will be displayed
|
|
|
4369 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4370 QUIT is inhibited while these functions are running, and if
|
|
|
4371 an error occurs, Qunbound is returned instead of the normal
|
|
|
4372 return value.
|
|
|
4373 */
|
|
|
4374
|
|
|
4375 /* #### This stuff needs to catch throws as well. We need to
|
|
|
4376 improve internal_catch() so it can take a "catch anything"
|
|
|
4377 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4378
|
|
|
4379 static Lisp_Object
|
|
|
4380 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4381 {
|
|
|
4382 if (!NILP (errordata))
|
|
|
4383 {
|
|
|
4384 Lisp_Object args[2];
|
|
|
4385
|
|
|
4386 if (!NILP (arg))
|
|
|
4387 {
|
|
|
4388 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4389 args[0] = build_string (str);
|
|
|
4390 }
|
|
|
4391 else
|
|
|
4392 args[0] = build_string ("error");
|
|
|
4393 /* #### This should call
|
|
|
4394 (with-output-to-string (display-error errordata))
|
|
|
4395 but that stuff is all in Lisp currently. */
|
|
|
4396 args[1] = errordata;
|
|
|
4397 warn_when_safe_lispobj
|
|
|
4398 (Qerror, Qwarning,
|
|
442
|
4399 emacs_doprnt_string_lisp ((const Bufbyte *) "%s: %s",
|
|
428
|
4400 Qnil, -1, 2, args));
|
|
|
4401 }
|
|
|
4402 return Qunbound;
|
|
|
4403 }
|
|
|
4404
|
|
|
4405 static Lisp_Object
|
|
|
4406 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4407 {
|
|
|
4408 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4409 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4410 return caught_a_squirmer (errordata, arg);
|
|
|
4411 }
|
|
|
4412
|
|
|
4413 static Lisp_Object
|
|
|
4414 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4415 {
|
|
|
4416 Lisp_Object hook = Fcar (arg);
|
|
|
4417 arg = Fcdr (arg);
|
|
|
4418 /* Clear out the hook. */
|
|
|
4419 Fset (hook, Qnil);
|
|
|
4420 return caught_a_squirmer (errordata, arg);
|
|
|
4421 }
|
|
|
4422
|
|
|
4423 static Lisp_Object
|
|
|
4424 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4425 Lisp_Object arg)
|
|
|
4426 {
|
|
|
4427 Lisp_Object hook = Fcar (arg);
|
|
|
4428 arg = Fcdr (arg);
|
|
|
4429 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4430 /* Clear out the hook. */
|
|
|
4431 Fset (hook, Qnil);
|
|
|
4432 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4433 }
|
|
|
4434
|
|
|
4435 static Lisp_Object
|
|
|
4436 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4437 {
|
|
|
4438 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4439 }
|
|
|
4440
|
|
|
4441 Lisp_Object
|
|
442
|
4442 eval_in_buffer_trapping_errors (const char *warning_string,
|
|
428
|
4443 struct buffer *buf, Lisp_Object form)
|
|
|
4444 {
|
|
|
4445 int speccount = specpdl_depth();
|
|
|
4446 Lisp_Object tem;
|
|
|
4447 Lisp_Object buffer;
|
|
|
4448 Lisp_Object cons;
|
|
|
4449 Lisp_Object opaque;
|
|
|
4450 struct gcpro gcpro1, gcpro2;
|
|
|
4451
|
|
|
4452 XSETBUFFER (buffer, buf);
|
|
|
4453
|
|
|
4454 specbind (Qinhibit_quit, Qt);
|
|
|
4455 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4456
|
|
|
4457 cons = noseeum_cons (buffer, form);
|
|
|
4458 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4459 GCPRO2 (cons, opaque);
|
|
|
4460 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4461 tem = condition_case_1 (Qerror,
|
|
|
4462 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4463 caught_a_squirmer, opaque);
|
|
|
4464 free_cons (XCONS (cons));
|
|
|
4465 if (OPAQUE_PTRP (opaque))
|
|
|
4466 free_opaque_ptr (opaque);
|
|
|
4467 UNGCPRO;
|
|
|
4468
|
|
|
4469 /* gc_currently_forbidden = 0; */
|
|
|
4470 return unbind_to (speccount, tem);
|
|
|
4471 }
|
|
|
4472
|
|
|
4473 static Lisp_Object
|
|
|
4474 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4475 {
|
|
|
4476 /* This function can GC */
|
|
|
4477 run_hook (hook_symbol);
|
|
|
4478 return Qnil;
|
|
|
4479 }
|
|
|
4480
|
|
|
4481 Lisp_Object
|
|
442
|
4482 run_hook_trapping_errors (const char *warning_string, Lisp_Object hook_symbol)
|
|
428
|
4483 {
|
|
|
4484 int speccount;
|
|
|
4485 Lisp_Object tem;
|
|
|
4486 Lisp_Object opaque;
|
|
|
4487 struct gcpro gcpro1;
|
|
|
4488
|
|
|
4489 if (!initialized || preparing_for_armageddon)
|
|
|
4490 return Qnil;
|
|
|
4491 tem = find_symbol_value (hook_symbol);
|
|
|
4492 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4493 return Qnil;
|
|
|
4494
|
|
|
4495 speccount = specpdl_depth();
|
|
|
4496 specbind (Qinhibit_quit, Qt);
|
|
|
4497
|
|
|
4498 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4499 GCPRO1 (opaque);
|
|
|
4500 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4501 tem = condition_case_1 (Qerror,
|
|
|
4502 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4503 caught_a_squirmer, opaque);
|
|
|
4504 if (OPAQUE_PTRP (opaque))
|
|
|
4505 free_opaque_ptr (opaque);
|
|
|
4506 UNGCPRO;
|
|
|
4507
|
|
|
4508 return unbind_to (speccount, tem);
|
|
|
4509 }
|
|
|
4510
|
|
|
4511 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4512 if an error occurs. */
|
|
|
4513
|
|
|
4514 Lisp_Object
|
|
442
|
4515 safe_run_hook_trapping_errors (const char *warning_string,
|
|
428
|
4516 Lisp_Object hook_symbol,
|
|
|
4517 int allow_quit)
|
|
|
4518 {
|
|
|
4519 int speccount = specpdl_depth();
|
|
|
4520 Lisp_Object tem;
|
|
|
4521 Lisp_Object cons = Qnil;
|
|
|
4522 struct gcpro gcpro1;
|
|
|
4523
|
|
|
4524 if (!initialized || preparing_for_armageddon)
|
|
|
4525 return Qnil;
|
|
|
4526 tem = find_symbol_value (hook_symbol);
|
|
|
4527 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4528 return Qnil;
|
|
|
4529
|
|
|
4530 if (!allow_quit)
|
|
|
4531 specbind (Qinhibit_quit, Qt);
|
|
|
4532
|
|
|
4533 cons = noseeum_cons (hook_symbol,
|
|
|
4534 warning_string ? make_opaque_ptr ((void *)warning_string)
|
|
|
4535 : Qnil);
|
|
|
4536 GCPRO1 (cons);
|
|
|
4537 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4538 tem = condition_case_1 (Qerror,
|
|
|
4539 catch_them_squirmers_run_hook,
|
|
|
4540 hook_symbol,
|
|
|
4541 allow_quit ?
|
|
|
4542 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4543 safe_run_hook_caught_a_squirmer,
|
|
|
4544 cons);
|
|
|
4545 if (OPAQUE_PTRP (XCDR (cons)))
|
|
|
4546 free_opaque_ptr (XCDR (cons));
|
|
|
4547 free_cons (XCONS (cons));
|
|
|
4548 UNGCPRO;
|
|
|
4549
|
|
|
4550 return unbind_to (speccount, tem);
|
|
|
4551 }
|
|
|
4552
|
|
|
4553 static Lisp_Object
|
|
|
4554 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4555 {
|
|
|
4556 /* This function can GC */
|
|
|
4557 return call0 (function);
|
|
|
4558 }
|
|
|
4559
|
|
|
4560 Lisp_Object
|
|
442
|
4561 call0_trapping_errors (const char *warning_string, Lisp_Object function)
|
|
428
|
4562 {
|
|
|
4563 int speccount;
|
|
|
4564 Lisp_Object tem;
|
|
|
4565 Lisp_Object opaque = Qnil;
|
|
|
4566 struct gcpro gcpro1, gcpro2;
|
|
|
4567
|
|
|
4568 if (SYMBOLP (function))
|
|
|
4569 {
|
|
|
4570 tem = XSYMBOL (function)->function;
|
|
|
4571 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4572 return Qnil;
|
|
|
4573 }
|
|
|
4574
|
|
|
4575 GCPRO2 (opaque, function);
|
|
|
4576 speccount = specpdl_depth();
|
|
|
4577 specbind (Qinhibit_quit, Qt);
|
|
|
4578 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4579
|
|
|
4580 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4581 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4582 tem = condition_case_1 (Qerror,
|
|
|
4583 catch_them_squirmers_call0, function,
|
|
|
4584 caught_a_squirmer, opaque);
|
|
|
4585 if (OPAQUE_PTRP (opaque))
|
|
|
4586 free_opaque_ptr (opaque);
|
|
|
4587 UNGCPRO;
|
|
|
4588
|
|
|
4589 /* gc_currently_forbidden = 0; */
|
|
|
4590 return unbind_to (speccount, tem);
|
|
|
4591 }
|
|
|
4592
|
|
|
4593 static Lisp_Object
|
|
|
4594 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4595 {
|
|
|
4596 /* This function can GC */
|
|
|
4597 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4598 }
|
|
|
4599
|
|
|
4600 static Lisp_Object
|
|
|
4601 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4602 {
|
|
|
4603 /* This function can GC */
|
|
|
4604 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4605 }
|
|
|
4606
|
|
|
4607 Lisp_Object
|
|
442
|
4608 call1_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
428
|
4609 Lisp_Object object)
|
|
|
4610 {
|
|
|
4611 int speccount = specpdl_depth();
|
|
|
4612 Lisp_Object tem;
|
|
|
4613 Lisp_Object cons = Qnil;
|
|
|
4614 Lisp_Object opaque = Qnil;
|
|
|
4615 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4616
|
|
|
4617 if (SYMBOLP (function))
|
|
|
4618 {
|
|
|
4619 tem = XSYMBOL (function)->function;
|
|
|
4620 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4621 return Qnil;
|
|
|
4622 }
|
|
|
4623
|
|
|
4624 GCPRO4 (cons, opaque, function, object);
|
|
|
4625
|
|
|
4626 specbind (Qinhibit_quit, Qt);
|
|
|
4627 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4628
|
|
|
4629 cons = noseeum_cons (function, object);
|
|
|
4630 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4631 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4632 tem = condition_case_1 (Qerror,
|
|
|
4633 catch_them_squirmers_call1, cons,
|
|
|
4634 caught_a_squirmer, opaque);
|
|
|
4635 if (OPAQUE_PTRP (opaque))
|
|
|
4636 free_opaque_ptr (opaque);
|
|
|
4637 free_cons (XCONS (cons));
|
|
|
4638 UNGCPRO;
|
|
|
4639
|
|
|
4640 /* gc_currently_forbidden = 0; */
|
|
|
4641 return unbind_to (speccount, tem);
|
|
|
4642 }
|
|
|
4643
|
|
|
4644 Lisp_Object
|
|
442
|
4645 call2_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
428
|
4646 Lisp_Object object1, Lisp_Object object2)
|
|
|
4647 {
|
|
|
4648 int speccount = specpdl_depth();
|
|
|
4649 Lisp_Object tem;
|
|
|
4650 Lisp_Object cons = Qnil;
|
|
|
4651 Lisp_Object opaque = Qnil;
|
|
|
4652 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4653
|
|
|
4654 if (SYMBOLP (function))
|
|
|
4655 {
|
|
|
4656 tem = XSYMBOL (function)->function;
|
|
|
4657 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4658 return Qnil;
|
|
|
4659 }
|
|
|
4660
|
|
|
4661 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4662 specbind (Qinhibit_quit, Qt);
|
|
|
4663 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4664
|
|
|
4665 cons = list3 (function, object1, object2);
|
|
|
4666 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
|
4667 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4668 tem = condition_case_1 (Qerror,
|
|
|
4669 catch_them_squirmers_call2, cons,
|
|
|
4670 caught_a_squirmer, opaque);
|
|
|
4671 if (OPAQUE_PTRP (opaque))
|
|
|
4672 free_opaque_ptr (opaque);
|
|
|
4673 free_list (cons);
|
|
|
4674 UNGCPRO;
|
|
|
4675
|
|
|
4676 /* gc_currently_forbidden = 0; */
|
|
|
4677 return unbind_to (speccount, tem);
|
|
|
4678 }
|
|
|
4679
|
|
|
4680
|
|
|
4681 /************************************************************************/
|
|
|
4682 /* The special binding stack */
|
|
|
4683 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4684 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4685 /************************************************************************/
|
|
|
4686
|
|
|
4687 #define min_max_specpdl_size 400
|
|
|
4688
|
|
|
4689 void
|
|
|
4690 grow_specpdl (size_t reserved)
|
|
|
4691 {
|
|
|
4692 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4693 if (size_needed >= max_specpdl_size)
|
|
|
4694 {
|
|
|
4695 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4696 max_specpdl_size = min_max_specpdl_size;
|
|
|
4697 if (size_needed >= max_specpdl_size)
|
|
|
4698 {
|
|
|
4699 if (!NILP (Vdebug_on_error) ||
|
|
|
4700 !NILP (Vdebug_on_signal))
|
|
|
4701 /* Leave room for some specpdl in the debugger. */
|
|
|
4702 max_specpdl_size = size_needed + 100;
|
|
563
|
4703 signal_continuable_error
|
|
|
4704 (Qstack_overflow,
|
|
|
4705 "Variable binding depth exceeds max-specpdl-size", Qunbound);
|
|
428
|
4706 }
|
|
|
4707 }
|
|
|
4708 while (specpdl_size < size_needed)
|
|
|
4709 {
|
|
|
4710 specpdl_size *= 2;
|
|
|
4711 if (specpdl_size > max_specpdl_size)
|
|
|
4712 specpdl_size = max_specpdl_size;
|
|
|
4713 }
|
|
|
4714 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
|
4715 specpdl_ptr = specpdl + specpdl_depth();
|
|
|
4716 }
|
|
|
4717
|
|
|
4718
|
|
|
4719 /* Handle unbinding buffer-local variables */
|
|
|
4720 static Lisp_Object
|
|
|
4721 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4722 {
|
|
|
4723 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4724 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
440
|
4725 Lisp_Cons *victim = XCONS (ovalue);
|
|
428
|
4726 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4727 ovalue = victim->cdr;
|
|
|
4728
|
|
|
4729 free_cons (victim);
|
|
|
4730
|
|
|
4731 if (NILP (buf))
|
|
|
4732 {
|
|
|
4733 /* Deleted buffer -- do nothing */
|
|
|
4734 }
|
|
|
4735 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4736 {
|
|
|
4737 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4738 * (kill-local-variable can do this.)
|
|
|
4739 * Do nothing in this case.
|
|
|
4740 */
|
|
|
4741 }
|
|
|
4742 else if (EQ (buf, current))
|
|
|
4743 Fset (symbol, ovalue);
|
|
|
4744 else
|
|
|
4745 {
|
|
|
4746 /* Urk! Somebody switched buffers */
|
|
|
4747 struct gcpro gcpro1;
|
|
|
4748 GCPRO1 (current);
|
|
|
4749 Fset_buffer (buf);
|
|
|
4750 Fset (symbol, ovalue);
|
|
|
4751 Fset_buffer (current);
|
|
|
4752 UNGCPRO;
|
|
|
4753 }
|
|
|
4754 return symbol;
|
|
|
4755 }
|
|
|
4756
|
|
|
4757 static Lisp_Object
|
|
|
4758 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4759 {
|
|
|
4760 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4761 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4762
|
|
|
4763 buffer = get_buffer (buffer, 0);
|
|
|
4764 if (NILP (buffer))
|
|
|
4765 {
|
|
|
4766 /* Deleted buffer -- do nothing */
|
|
|
4767 }
|
|
|
4768 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4769 {
|
|
|
4770 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4771 * (kill-local-variable can do this.)
|
|
|
4772 * Do nothing in this case.
|
|
|
4773 */
|
|
|
4774 }
|
|
|
4775 else if (EQ (buffer, current))
|
|
|
4776 Fkill_local_variable (symbol);
|
|
|
4777 else
|
|
|
4778 {
|
|
|
4779 /* Urk! Somebody switched buffers */
|
|
|
4780 struct gcpro gcpro1;
|
|
|
4781 GCPRO1 (current);
|
|
|
4782 Fset_buffer (buffer);
|
|
|
4783 Fkill_local_variable (symbol);
|
|
|
4784 Fset_buffer (current);
|
|
|
4785 UNGCPRO;
|
|
|
4786 }
|
|
|
4787 return symbol;
|
|
|
4788 }
|
|
|
4789
|
|
|
4790
|
|
|
4791 void
|
|
|
4792 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4793 {
|
|
|
4794 SPECBIND (symbol, value);
|
|
|
4795 }
|
|
|
4796
|
|
|
4797 void
|
|
|
4798 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4799 {
|
|
|
4800 int buffer_local =
|
|
|
4801 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4802
|
|
|
4803 if (buffer_local == 0)
|
|
|
4804 {
|
|
|
4805 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4806 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4807 }
|
|
|
4808 else if (buffer_local > 0)
|
|
|
4809 {
|
|
|
4810 /* Already buffer-local */
|
|
|
4811 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4812 find_symbol_value (symbol));
|
|
|
4813 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4814 }
|
|
|
4815 else
|
|
|
4816 {
|
|
|
4817 /* About to become buffer-local */
|
|
|
4818 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4819 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4820 }
|
|
|
4821
|
|
|
4822 specpdl_ptr->symbol = symbol;
|
|
|
4823 specpdl_ptr++;
|
|
|
4824 specpdl_depth_counter++;
|
|
|
4825
|
|
|
4826 Fset (symbol, value);
|
|
|
4827 }
|
|
|
4828
|
|
546
|
4829 /* Note: As long as the unwind-protect exists, its arg is automatically
|
|
|
4830 GCPRO'd. */
|
|
|
4831
|
|
428
|
4832 void
|
|
|
4833 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4834 Lisp_Object arg)
|
|
|
4835 {
|
|
|
4836 SPECPDL_RESERVE (1);
|
|
|
4837 specpdl_ptr->func = function;
|
|
|
4838 specpdl_ptr->symbol = Qnil;
|
|
|
4839 specpdl_ptr->old_value = arg;
|
|
|
4840 specpdl_ptr++;
|
|
|
4841 specpdl_depth_counter++;
|
|
|
4842 }
|
|
|
4843
|
|
|
4844 extern int check_sigio (void);
|
|
|
4845
|
|
|
4846 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4847 VALUE is not used, except that, purely as a convenience to the
|
|
|
4848 caller, it is protected from garbage-protection. */
|
|
|
4849 Lisp_Object
|
|
|
4850 unbind_to (int count, Lisp_Object value)
|
|
|
4851 {
|
|
|
4852 UNBIND_TO_GCPRO (count, value);
|
|
|
4853 return value;
|
|
|
4854 }
|
|
|
4855
|
|
|
4856 /* Don't call this directly.
|
|
|
4857 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4858 void
|
|
|
4859 unbind_to_hairy (int count)
|
|
|
4860 {
|
|
|
4861 int quitf;
|
|
|
4862
|
|
442
|
4863 ++specpdl_ptr;
|
|
|
4864 ++specpdl_depth_counter;
|
|
|
4865
|
|
428
|
4866 check_quit (); /* make Vquit_flag accurate */
|
|
|
4867 quitf = !NILP (Vquit_flag);
|
|
|
4868 Vquit_flag = Qnil;
|
|
|
4869
|
|
|
4870 while (specpdl_depth_counter != count)
|
|
|
4871 {
|
|
|
4872 --specpdl_ptr;
|
|
|
4873 --specpdl_depth_counter;
|
|
|
4874
|
|
|
4875 if (specpdl_ptr->func != 0)
|
|
|
4876 /* An unwind-protect */
|
|
|
4877 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
|
4878 else
|
|
|
4879 {
|
|
|
4880 /* We checked symbol for validity when we specbound it,
|
|
|
4881 so only need to call Fset if symbol has magic value. */
|
|
440
|
4882 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
428
|
4883 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4884 sym->value = specpdl_ptr->old_value;
|
|
|
4885 else
|
|
|
4886 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4887 }
|
|
|
4888
|
|
|
4889 #if 0 /* martin */
|
|
|
4890 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4891 /* There should never be anything here for us to remove.
|
|
|
4892 If so, it indicates a logic error in Emacs. Catches
|
|
|
4893 should get removed when a throw or signal occurs, or
|
|
|
4894 when a catch or condition-case exits normally. But
|
|
|
4895 it's too dangerous to just remove this code. --ben */
|
|
|
4896
|
|
|
4897 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4898 Braino on mly's part? */
|
|
|
4899 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4900 that catch can't possibly still be valid. */
|
|
|
4901 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4902 {
|
|
|
4903 catchlist = catchlist->next;
|
|
|
4904 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4905 }
|
|
|
4906 #endif
|
|
|
4907 #endif
|
|
|
4908 }
|
|
|
4909 if (quitf)
|
|
|
4910 Vquit_flag = Qt;
|
|
|
4911 }
|
|
|
4912
|
|
|
4913
|
|
|
4914
|
|
|
4915 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4916 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4917
|
|
|
4918 Lisp_Object
|
|
|
4919 top_level_value (Lisp_Object symbol)
|
|
|
4920 {
|
|
|
4921 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4922
|
|
|
4923 CHECK_SYMBOL (symbol);
|
|
|
4924 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4925 {
|
|
|
4926 if (EQ (ptr->symbol, symbol))
|
|
|
4927 return ptr->old_value;
|
|
|
4928 }
|
|
|
4929 return XSYMBOL (symbol)->value;
|
|
|
4930 }
|
|
|
4931
|
|
|
4932 #if 0
|
|
|
4933
|
|
|
4934 Lisp_Object
|
|
|
4935 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4936 {
|
|
|
4937 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4938
|
|
|
4939 CHECK_SYMBOL (symbol);
|
|
|
4940 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4941 {
|
|
|
4942 if (EQ (ptr->symbol, symbol))
|
|
|
4943 {
|
|
|
4944 ptr->old_value = newval;
|
|
|
4945 return newval;
|
|
|
4946 }
|
|
|
4947 }
|
|
|
4948 return Fset (symbol, newval);
|
|
|
4949 }
|
|
|
4950
|
|
|
4951 #endif /* 0 */
|
|
|
4952
|
|
|
4953
|
|
|
4954 /************************************************************************/
|
|
|
4955 /* Backtraces */
|
|
|
4956 /************************************************************************/
|
|
|
4957
|
|
|
4958 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
|
4959 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4960 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
|
4961 */
|
|
|
4962 (level, flag))
|
|
|
4963 {
|
|
|
4964 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4965 REGISTER int i;
|
|
|
4966
|
|
|
4967 CHECK_INT (level);
|
|
|
4968
|
|
|
4969 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4970 {
|
|
|
4971 backlist = backlist->next;
|
|
|
4972 }
|
|
|
4973
|
|
|
4974 if (backlist)
|
|
|
4975 backlist->debug_on_exit = !NILP (flag);
|
|
|
4976
|
|
|
4977 return flag;
|
|
|
4978 }
|
|
|
4979
|
|
|
4980 static void
|
|
|
4981 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4982 {
|
|
|
4983 int printing_bindings = 0;
|
|
|
4984
|
|
|
4985 for (; speccount > speclimit; speccount--)
|
|
|
4986 {
|
|
|
4987 if (specpdl[speccount - 1].func == 0
|
|
|
4988 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4989 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4990 {
|
|
|
4991 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4992 stream);
|
|
|
4993 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4994 printing_bindings = 1;
|
|
|
4995 }
|
|
|
4996 else
|
|
|
4997 {
|
|
|
4998 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4999 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
5000 printing_bindings = 0;
|
|
|
5001 }
|
|
|
5002 }
|
|
|
5003 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
5004 }
|
|
|
5005
|
|
|
5006 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
|
5007 Print a trace of Lisp function calls currently active.
|
|
438
|
5008 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
444
|
5009 and defaults to the value of `standard-output'.
|
|
|
5010 Optional second arg DETAILED non-nil means show places where currently
|
|
|
5011 active variable bindings, catches, condition-cases, and
|
|
|
5012 unwind-protects, as well as function calls, were made.
|
|
428
|
5013 */
|
|
|
5014 (stream, detailed))
|
|
|
5015 {
|
|
|
5016 /* This function can GC */
|
|
|
5017 struct backtrace *backlist = backtrace_list;
|
|
|
5018 struct catchtag *catches = catchlist;
|
|
|
5019 int speccount = specpdl_depth();
|
|
|
5020
|
|
|
5021 int old_nl = print_escape_newlines;
|
|
|
5022 int old_pr = print_readably;
|
|
|
5023 Lisp_Object old_level = Vprint_level;
|
|
|
5024 Lisp_Object oiq = Vinhibit_quit;
|
|
|
5025 struct gcpro gcpro1, gcpro2;
|
|
|
5026
|
|
|
5027 /* We can't allow quits in here because that could cause the values
|
|
|
5028 of print_readably and print_escape_newlines to get screwed up.
|
|
|
5029 Normally we would use a record_unwind_protect but that would
|
|
|
5030 screw up the functioning of this function. */
|
|
|
5031 Vinhibit_quit = Qt;
|
|
|
5032
|
|
|
5033 entering_debugger = 0;
|
|
|
5034
|
|
|
5035 Vprint_level = make_int (3);
|
|
|
5036 print_readably = 0;
|
|
|
5037 print_escape_newlines = 1;
|
|
|
5038
|
|
|
5039 GCPRO2 (stream, old_level);
|
|
|
5040
|
|
|
5041 if (NILP (stream))
|
|
|
5042 stream = Vstandard_output;
|
|
|
5043 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
5044 stream = Fselected_frame (Qnil);
|
|
|
5045
|
|
|
5046 for (;;)
|
|
|
5047 {
|
|
|
5048 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
5049 {
|
|
|
5050 int catchpdl = catches->pdlcount;
|
|
438
|
5051 if (speccount > catchpdl
|
|
|
5052 && specpdl[catchpdl].func == condition_case_unwind)
|
|
428
|
5053 /* This is a condition-case catchpoint */
|
|
|
5054 catchpdl = catchpdl + 1;
|
|
|
5055
|
|
|
5056 backtrace_specials (speccount, catchpdl, stream);
|
|
|
5057
|
|
|
5058 speccount = catches->pdlcount;
|
|
|
5059 if (catchpdl == speccount)
|
|
|
5060 {
|
|
|
5061 write_c_string (" # (catch ", stream);
|
|
|
5062 Fprin1 (catches->tag, stream);
|
|
|
5063 write_c_string (" ...)\n", stream);
|
|
|
5064 }
|
|
|
5065 else
|
|
|
5066 {
|
|
|
5067 write_c_string (" # (condition-case ... . ", stream);
|
|
|
5068 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
5069 write_c_string (")\n", stream);
|
|
|
5070 }
|
|
|
5071 catches = catches->next;
|
|
|
5072 }
|
|
|
5073 else if (!backlist)
|
|
|
5074 break;
|
|
|
5075 else
|
|
|
5076 {
|
|
|
5077 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
5078 {
|
|
|
5079 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
5080 speccount = backlist->pdlcount;
|
|
|
5081 }
|
|
|
5082 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
5083 stream);
|
|
|
5084 if (backlist->nargs == UNEVALLED)
|
|
|
5085 {
|
|
|
5086 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
5087 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
5088 }
|
|
|
5089 else
|
|
|
5090 {
|
|
|
5091 Lisp_Object tem = *backlist->function;
|
|
|
5092 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
5093 write_c_string ("(", stream);
|
|
|
5094 if (backlist->nargs == MANY)
|
|
|
5095 {
|
|
|
5096 int i;
|
|
|
5097 Lisp_Object tail = Qnil;
|
|
|
5098 struct gcpro ngcpro1;
|
|
|
5099
|
|
|
5100 NGCPRO1 (tail);
|
|
|
5101 for (tail = *backlist->args, i = 0;
|
|
|
5102 !NILP (tail);
|
|
|
5103 tail = Fcdr (tail), i++)
|
|
|
5104 {
|
|
|
5105 if (i != 0) write_c_string (" ", stream);
|
|
|
5106 Fprin1 (Fcar (tail), stream);
|
|
|
5107 }
|
|
|
5108 NUNGCPRO;
|
|
|
5109 }
|
|
|
5110 else
|
|
|
5111 {
|
|
|
5112 int i;
|
|
|
5113 for (i = 0; i < backlist->nargs; i++)
|
|
|
5114 {
|
|
|
5115 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
5116 write_c_string("\"...\"", stream);
|
|
|
5117 continue;
|
|
|
5118 }
|
|
|
5119 if (i != 0) write_c_string (" ", stream);
|
|
|
5120 Fprin1 (backlist->args[i], stream);
|
|
|
5121 }
|
|
|
5122 }
|
|
442
|
5123 write_c_string (")\n", stream);
|
|
428
|
5124 }
|
|
|
5125 backlist = backlist->next;
|
|
|
5126 }
|
|
|
5127 }
|
|
|
5128 Vprint_level = old_level;
|
|
|
5129 print_readably = old_pr;
|
|
|
5130 print_escape_newlines = old_nl;
|
|
|
5131 UNGCPRO;
|
|
|
5132 Vinhibit_quit = oiq;
|
|
|
5133 return Qnil;
|
|
|
5134 }
|
|
|
5135
|
|
|
5136
|
|
444
|
5137 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /*
|
|
|
5138 Return the function and arguments NFRAMES up from current execution point.
|
|
428
|
5139 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
5140 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
5141 If that frame has evaluated its arguments and called its function already,
|
|
|
5142 the value is (t FUNCTION ARG-VALUES...).
|
|
|
5143 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
5144 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
5145 or a lambda expression for macro calls.
|
|
444
|
5146 If NFRAMES is more than the number of frames, the value is nil.
|
|
428
|
5147 */
|
|
|
5148 (nframes))
|
|
|
5149 {
|
|
|
5150 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5151 REGISTER int i;
|
|
|
5152 Lisp_Object tem;
|
|
|
5153
|
|
|
5154 CHECK_NATNUM (nframes);
|
|
|
5155
|
|
|
5156 /* Find the frame requested. */
|
|
|
5157 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
5158 backlist = backlist->next;
|
|
|
5159
|
|
|
5160 if (!backlist)
|
|
|
5161 return Qnil;
|
|
|
5162 if (backlist->nargs == UNEVALLED)
|
|
|
5163 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
5164 else
|
|
|
5165 {
|
|
|
5166 if (backlist->nargs == MANY)
|
|
|
5167 tem = *backlist->args;
|
|
|
5168 else
|
|
|
5169 tem = Flist (backlist->nargs, backlist->args);
|
|
|
5170
|
|
|
5171 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
5172 }
|
|
|
5173 }
|
|
|
5174
|
|
|
5175
|
|
|
5176 /************************************************************************/
|
|
|
5177 /* Warnings */
|
|
|
5178 /************************************************************************/
|
|
|
5179
|
|
|
5180 void
|
|
|
5181 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
5182 Lisp_Object obj)
|
|
|
5183 {
|
|
|
5184 obj = list1 (list3 (class, level, obj));
|
|
|
5185 if (NILP (Vpending_warnings))
|
|
|
5186 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
5187 else
|
|
|
5188 {
|
|
|
5189 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
5190 Vpending_warnings_tail = obj;
|
|
|
5191 }
|
|
|
5192 }
|
|
|
5193
|
|
|
5194 /* #### This should probably accept Lisp objects; but then we have
|
|
|
5195 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
5196
|
|
|
5197 An alternative approach is to just pass some non-string type of
|
|
|
5198 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
5199 automatically be called when it is safe to do so. */
|
|
|
5200
|
|
|
5201 void
|
|
442
|
5202 warn_when_safe (Lisp_Object class, Lisp_Object level, const char *fmt, ...)
|
|
428
|
5203 {
|
|
|
5204 Lisp_Object obj;
|
|
|
5205 va_list args;
|
|
|
5206
|
|
|
5207 va_start (args, fmt);
|
|
442
|
5208 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt),
|
|
428
|
5209 Qnil, -1, args);
|
|
|
5210 va_end (args);
|
|
|
5211
|
|
|
5212 warn_when_safe_lispobj (class, level, obj);
|
|
|
5213 }
|
|
|
5214
|
|
|
5215
|
|
|
5216
|
|
|
5217
|
|
|
5218 /************************************************************************/
|
|
|
5219 /* Initialization */
|
|
|
5220 /************************************************************************/
|
|
|
5221
|
|
|
5222 void
|
|
|
5223 syms_of_eval (void)
|
|
|
5224 {
|
|
442
|
5225 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
5226
|
|
563
|
5227 DEFSYMBOL (Qinhibit_quit);
|
|
|
5228 DEFSYMBOL (Qautoload);
|
|
|
5229 DEFSYMBOL (Qdebug_on_error);
|
|
|
5230 DEFSYMBOL (Qstack_trace_on_error);
|
|
|
5231 DEFSYMBOL (Qdebug_on_signal);
|
|
|
5232 DEFSYMBOL (Qstack_trace_on_signal);
|
|
|
5233 DEFSYMBOL (Qdebugger);
|
|
|
5234 DEFSYMBOL (Qmacro);
|
|
428
|
5235 defsymbol (&Qand_rest, "&rest");
|
|
|
5236 defsymbol (&Qand_optional, "&optional");
|
|
|
5237 /* Note that the process code also uses Qexit */
|
|
563
|
5238 DEFSYMBOL (Qexit);
|
|
|
5239 DEFSYMBOL (Qsetq);
|
|
|
5240 DEFSYMBOL (Qinteractive);
|
|
|
5241 DEFSYMBOL (Qcommandp);
|
|
|
5242 DEFSYMBOL (Qdefun);
|
|
|
5243 DEFSYMBOL (Qprogn);
|
|
|
5244 DEFSYMBOL (Qvalues);
|
|
|
5245 DEFSYMBOL (Qdisplay_warning);
|
|
|
5246 DEFSYMBOL (Qrun_hooks);
|
|
|
5247 DEFSYMBOL (Qif);
|
|
428
|
5248
|
|
|
5249 DEFSUBR (For);
|
|
|
5250 DEFSUBR (Fand);
|
|
|
5251 DEFSUBR (Fif);
|
|
|
5252 DEFSUBR_MACRO (Fwhen);
|
|
|
5253 DEFSUBR_MACRO (Funless);
|
|
|
5254 DEFSUBR (Fcond);
|
|
|
5255 DEFSUBR (Fprogn);
|
|
|
5256 DEFSUBR (Fprog1);
|
|
|
5257 DEFSUBR (Fprog2);
|
|
|
5258 DEFSUBR (Fsetq);
|
|
|
5259 DEFSUBR (Fquote);
|
|
|
5260 DEFSUBR (Ffunction);
|
|
|
5261 DEFSUBR (Fdefun);
|
|
|
5262 DEFSUBR (Fdefmacro);
|
|
|
5263 DEFSUBR (Fdefvar);
|
|
|
5264 DEFSUBR (Fdefconst);
|
|
|
5265 DEFSUBR (Fuser_variable_p);
|
|
|
5266 DEFSUBR (Flet);
|
|
|
5267 DEFSUBR (FletX);
|
|
|
5268 DEFSUBR (Fwhile);
|
|
|
5269 DEFSUBR (Fmacroexpand_internal);
|
|
|
5270 DEFSUBR (Fcatch);
|
|
|
5271 DEFSUBR (Fthrow);
|
|
|
5272 DEFSUBR (Funwind_protect);
|
|
|
5273 DEFSUBR (Fcondition_case);
|
|
|
5274 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5275 DEFSUBR (Fsignal);
|
|
|
5276 DEFSUBR (Finteractive_p);
|
|
|
5277 DEFSUBR (Fcommandp);
|
|
|
5278 DEFSUBR (Fcommand_execute);
|
|
|
5279 DEFSUBR (Fautoload);
|
|
|
5280 DEFSUBR (Feval);
|
|
|
5281 DEFSUBR (Fapply);
|
|
|
5282 DEFSUBR (Ffuncall);
|
|
|
5283 DEFSUBR (Ffunctionp);
|
|
|
5284 DEFSUBR (Ffunction_min_args);
|
|
|
5285 DEFSUBR (Ffunction_max_args);
|
|
|
5286 DEFSUBR (Frun_hooks);
|
|
|
5287 DEFSUBR (Frun_hook_with_args);
|
|
|
5288 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5289 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5290 DEFSUBR (Fbacktrace_debug);
|
|
|
5291 DEFSUBR (Fbacktrace);
|
|
|
5292 DEFSUBR (Fbacktrace_frame);
|
|
|
5293 }
|
|
|
5294
|
|
|
5295 void
|
|
|
5296 reinit_eval (void)
|
|
|
5297 {
|
|
|
5298 specpdl_ptr = specpdl;
|
|
|
5299 specpdl_depth_counter = 0;
|
|
|
5300 catchlist = 0;
|
|
|
5301 Vcondition_handlers = Qnil;
|
|
|
5302 backtrace_list = 0;
|
|
|
5303 Vquit_flag = Qnil;
|
|
|
5304 debug_on_next_call = 0;
|
|
|
5305 lisp_eval_depth = 0;
|
|
|
5306 entering_debugger = 0;
|
|
|
5307 }
|
|
|
5308
|
|
|
5309 void
|
|
|
5310 reinit_vars_of_eval (void)
|
|
|
5311 {
|
|
|
5312 preparing_for_armageddon = 0;
|
|
|
5313 in_warnings = 0;
|
|
|
5314 Qunbound_suspended_errors_tag = make_opaque_ptr (&Qunbound_suspended_errors_tag);
|
|
|
5315 staticpro_nodump (&Qunbound_suspended_errors_tag);
|
|
|
5316
|
|
|
5317 specpdl_size = 50;
|
|
|
5318 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
5319 /* XEmacs change: increase these values. */
|
|
|
5320 max_specpdl_size = 3000;
|
|
442
|
5321 max_lisp_eval_depth = 1000;
|
|
|
5322 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
428
|
5323 throw_level = 0;
|
|
|
5324 #endif
|
|
|
5325 }
|
|
|
5326
|
|
|
5327 void
|
|
|
5328 vars_of_eval (void)
|
|
|
5329 {
|
|
|
5330 reinit_vars_of_eval ();
|
|
|
5331
|
|
|
5332 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5333 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5334 */ );
|
|
|
5335
|
|
|
5336 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5337 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5338 This limit is to catch infinite recursions for you before they cause
|
|
|
5339 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5340 You can safely make it considerably larger than its default value,
|
|
|
5341 if that proves inconveniently small.
|
|
|
5342 */ );
|
|
|
5343
|
|
|
5344 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5345 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5346 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5347 */ );
|
|
|
5348 Vquit_flag = Qnil;
|
|
|
5349
|
|
|
5350 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5351 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5352 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5353 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5354 To prevent this happening, set `quit-flag' to nil
|
|
|
5355 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5356 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5357 an X frame.
|
|
|
5358 */ );
|
|
|
5359 Vinhibit_quit = Qnil;
|
|
|
5360
|
|
|
5361 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5362 *Non-nil means automatically display a backtrace buffer
|
|
|
5363 after any error that is not handled by a `condition-case'.
|
|
|
5364 If the value is a list, an error only means to display a backtrace
|
|
|
5365 if one of its condition symbols appears in the list.
|
|
|
5366 See also variable `stack-trace-on-signal'.
|
|
|
5367 */ );
|
|
|
5368 Vstack_trace_on_error = Qnil;
|
|
|
5369
|
|
|
5370 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5371 *Non-nil means automatically display a backtrace buffer
|
|
|
5372 after any error that is signalled, whether or not it is handled by
|
|
|
5373 a `condition-case'.
|
|
|
5374 If the value is a list, an error only means to display a backtrace
|
|
|
5375 if one of its condition symbols appears in the list.
|
|
|
5376 See also variable `stack-trace-on-error'.
|
|
|
5377 */ );
|
|
|
5378 Vstack_trace_on_signal = Qnil;
|
|
|
5379
|
|
|
5380 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5381 *List of errors for which the debugger should not be called.
|
|
|
5382 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5383 If any element applies to a given error, that error skips the debugger
|
|
|
5384 and just returns to top level.
|
|
|
5385 This overrides the variable `debug-on-error'.
|
|
|
5386 It does not apply to errors handled by `condition-case'.
|
|
|
5387 */ );
|
|
|
5388 Vdebug_ignored_errors = Qnil;
|
|
|
5389
|
|
|
5390 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5391 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5392 The debugger will not be entered if the error is handled by
|
|
|
5393 a `condition-case'.
|
|
|
5394 If the value is a list, an error only means to enter the debugger
|
|
|
5395 if one of its condition symbols appears in the list.
|
|
|
5396 This variable is overridden by `debug-ignored-errors'.
|
|
|
5397 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5398 */ );
|
|
|
5399 Vdebug_on_error = Qnil;
|
|
|
5400
|
|
|
5401 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5402 *Non-nil means enter debugger if an error is signalled.
|
|
|
5403 The debugger will be entered whether or not the error is handled by
|
|
|
5404 a `condition-case'.
|
|
|
5405 If the value is a list, an error only means to enter the debugger
|
|
|
5406 if one of its condition symbols appears in the list.
|
|
|
5407 See also variable `debug-on-quit'.
|
|
|
5408 */ );
|
|
|
5409 Vdebug_on_signal = Qnil;
|
|
|
5410
|
|
|
5411 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5412 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5413 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5414 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5415 control-shift-G to signal a critical quit.
|
|
|
5416 */ );
|
|
|
5417 debug_on_quit = 0;
|
|
|
5418
|
|
|
5419 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5420 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5421 */ );
|
|
|
5422
|
|
|
5423 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5424 Function to call to invoke debugger.
|
|
|
5425 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5426 this function's value will be returned instead of that.
|
|
|
5427 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5428 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5429 If due to `eval' entry, one arg, t.
|
|
|
5430 */ );
|
|
|
5431 Vdebugger = Qnil;
|
|
|
5432
|
|
|
5433 staticpro (&Vpending_warnings);
|
|
|
5434 Vpending_warnings = Qnil;
|
|
452
|
5435 dump_add_root_object (&Vpending_warnings_tail);
|
|
428
|
5436 Vpending_warnings_tail = Qnil;
|
|
|
5437
|
|
|
5438 staticpro (&Vautoload_queue);
|
|
|
5439 Vautoload_queue = Qnil;
|
|
|
5440
|
|
|
5441 staticpro (&Vcondition_handlers);
|
|
|
5442
|
|
|
5443 staticpro (&Vcurrent_warning_class);
|
|
|
5444 Vcurrent_warning_class = Qnil;
|
|
|
5445
|
|
|
5446 staticpro (&Vcurrent_error_state);
|
|
|
5447 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5448
|
|
|
5449 reinit_eval ();
|
|
|
5450 }
|
