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0
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1 /* Evaluator for XEmacs Lisp interpreter.
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2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
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23
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24 /* Debugging hack */
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25 int always_gc;
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26
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27
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28 #include <config.h>
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29 #include "lisp.h"
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30
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31 #ifndef standalone
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32 #include "commands.h"
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33 #endif
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34
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35 #include "symeval.h"
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36 #include "backtrace.h"
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37 #include "bytecode.h"
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38 #include "buffer.h"
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39 #include "console.h"
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40 #include "opaque.h"
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41
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42 struct backtrace *backtrace_list;
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43
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116
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44 /* Note you must always fill all of the fields in a backtrace structure
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45 before pushing them on the backtrace_list. The profiling code depends
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46 on this. */
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47
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48 #define PUSH_BACKTRACE(bt) \
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49 do { (bt).next = backtrace_list; backtrace_list = &(bt); } while (0)
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50
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51 #define POP_BACKTRACE(bt) \
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52 do { backtrace_list = (bt).next; } while (0)
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53
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0
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54 /* This is the list of current catches (and also condition-cases).
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55 This is a stack: the most recent catch is at the head of the
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56 list. Catches are created by declaring a 'struct catchtag'
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57 locally, filling the .TAG field in with the tag, and doing
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58 a setjmp() on .JMP. Fthrow() will store the value passed
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59 to it in .VAL and longjmp() back to .JMP, back to the function
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60 that established the catch. This will always be either
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61 internal_catch() (catches established internally or through
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62 `catch') or condition_case_1 (condition-cases established
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63 internally or through `condition-case').
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64
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65 The catchtag also records the current position in the
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66 call stack (stored in BACKTRACE_LIST), the current position
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67 in the specpdl stack (used for variable bindings and
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68 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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69 current position in the GCPRO stack. All of these are
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70 restored by Fthrow().
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71 */
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72
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73 struct catchtag *catchlist;
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74
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75 Lisp_Object Qautoload, Qmacro, Qexit;
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76 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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77 Lisp_Object Vquit_flag, Vinhibit_quit;
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78 Lisp_Object Qand_rest, Qand_optional;
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79 Lisp_Object Qdebug_on_error;
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80 Lisp_Object Qstack_trace_on_error;
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81 Lisp_Object Qdebug_on_signal;
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82 Lisp_Object Qstack_trace_on_signal;
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83 Lisp_Object Qdebugger;
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84 Lisp_Object Qinhibit_quit;
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85 Lisp_Object Qrun_hooks;
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86
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87 Lisp_Object Qsetq;
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88
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89 Lisp_Object Qdisplay_warning;
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90 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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91
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92 /* Records whether we want errors to occur. This will be a boolean,
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93 nil (errors OK) or t (no errors). If t, an error will cause a
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94 throw to Qunbound_suspended_errors_tag.
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95
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96 See call_with_suspended_errors(). */
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97 Lisp_Object Vcurrent_error_state;
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98
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99 /* Current warning class when warnings occur, or nil for no warnings.
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100 Only meaningful when Vcurrent_error_state is non-nil.
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101 See call_with_suspended_errors(). */
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102 Lisp_Object Vcurrent_warning_class;
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103
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104 /* Special catch tag used in call_with_suspended_errors(). */
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105 Lisp_Object Qunbound_suspended_errors_tag;
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106
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107 /* Non-nil means we're going down, so we better not run any hooks
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108 or do other non-essential stuff. */
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109 int preparing_for_armageddon;
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110
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111 /* Non-nil means record all fset's and provide's, to be undone
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112 if the file being autoloaded is not fully loaded.
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113 They are recorded by being consed onto the front of Vautoload_queue:
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114 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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115
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116 Lisp_Object Vautoload_queue;
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117
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118 /* Current number of specbindings allocated in specpdl. */
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119 static int specpdl_size;
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120
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121 /* Pointer to beginning of specpdl. */
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122 struct specbinding *specpdl;
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123
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124 /* Pointer to first unused element in specpdl. */
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125 struct specbinding *specpdl_ptr;
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126
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2
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127 /* specpdl_ptr - specpdl. Callers outside this file should use
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128 * specpdl_depth () function-call */
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129 static int specpdl_depth_counter;
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130
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131 /* Maximum size allowed for specpdl allocation */
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132 int max_specpdl_size;
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133
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134 /* Depth in Lisp evaluations and function calls. */
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135 int lisp_eval_depth;
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136
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137 /* Maximum allowed depth in Lisp evaluations and function calls. */
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138 int max_lisp_eval_depth;
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139
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140 /* Nonzero means enter debugger before next function call */
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141 static int debug_on_next_call;
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142
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143 /* List of conditions (non-nil atom means all) which cause a backtrace
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144 if an error is handled by the command loop's error handler. */
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145 Lisp_Object Vstack_trace_on_error;
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146
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147 /* List of conditions (non-nil atom means all) which enter the debugger
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148 if an error is handled by the command loop's error handler. */
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149 Lisp_Object Vdebug_on_error;
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150
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163
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151 /* List of conditions and regexps specifying error messages which
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152 do not enter the debugger even if Vdebug_on_error says they should. */
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153 Lisp_Object Vdebug_ignored_errors;
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154
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0
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155 /* List of conditions (non-nil atom means all) which cause a backtrace
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156 if any error is signalled. */
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157 Lisp_Object Vstack_trace_on_signal;
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158
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159 /* List of conditions (non-nil atom means all) which enter the debugger
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160 if any error is signalled. */
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161 Lisp_Object Vdebug_on_signal;
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162
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163 /* Nonzero means enter debugger if a quit signal
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164 is handled by the command loop's error handler.
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165
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166 From lisp, this is a boolean variable and may have the values 0 and 1.
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167 But, eval.c temporarily uses the second bit of this variable to indicate
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168 that a critical_quit is in progress. The second bit is reset immediately
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169 after it is processed in signal_call_debugger(). */
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170 int debug_on_quit;
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171
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172 #if 0 /* FSFmacs */
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173 /* entering_debugger is basically equivalent */
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174 /* The value of num_nonmacro_input_chars as of the last time we
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175 started to enter the debugger. If we decide to enter the debugger
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176 again when this is still equal to num_nonmacro_input_chars, then we
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177 know that the debugger itself has an error, and we should just
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178 signal the error instead of entering an infinite loop of debugger
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179 invocations. */
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180 int when_entered_debugger;
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181 #endif
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182
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183 /* Nonzero means we are trying to enter the debugger.
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184 This is to prevent recursive attempts.
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185 Cleared by the debugger calling Fbacktrace */
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186 static int entering_debugger;
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187
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188 /* Function to call to invoke the debugger */
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189 Lisp_Object Vdebugger;
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190
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191 /* Chain of condition handlers currently in effect.
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192 The elements of this chain are contained in the stack frames
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193 of Fcondition_case and internal_condition_case.
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194 When an error is signaled (by calling Fsignal, below),
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195 this chain is searched for an element that applies.
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196
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197 Each element of this list is one of the following:
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198
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199 A list of a handler function and possibly args to pass to
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200 the function. This is a handler established with
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201 `call-with-condition-handler' (q.v.).
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202
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203 A list whose car is Qunbound and whose cdr is Qt.
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204 This is a special condition-case handler established
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205 by C code with condition_case_1(). All errors are
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206 trapped; the debugger is not invoked even if
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207 `debug-on-error' was set.
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208
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209 A list whose car is Qunbound and whose cdr is Qerror.
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210 This is a special condition-case handler established
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211 by C code with condition_case_1(). It is like Qt
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212 except that the debugger is invoked normally if it is
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213 called for.
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214
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215 A list whose car is Qunbound and whose cdr is a list
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216 of lists (CONDITION-NAME BODY ...) exactly as in
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217 `condition-case'. This is a normal `condition-case'
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218 handler.
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219
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220 Note that in all cases *except* the first, there is a
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221 corresponding catch, whose TAG is the value of
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222 Vcondition_handlers just after the handler data just
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223 described is pushed onto it. The reason is that
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224 `condition-case' handlers need to throw back to the
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225 place where the handler was installed before invoking
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226 it, while `call-with-condition-handler' handlers are
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227 invoked in the environment that `signal' was invoked
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228 in.
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229 */
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230 static Lisp_Object Vcondition_handlers;
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231
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232 /* Used for error catching purposes by throw_or_bomb_out */
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233 static int throw_level;
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234
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74
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235 static Lisp_Object primitive_funcall (lisp_fn_t fn, int nargs,
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0
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236 Lisp_Object args[]);
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237
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238
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239 /**********************************************************************/
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240 /* The subr and compiled-function types */
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241 /**********************************************************************/
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242
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243 static void print_subr (Lisp_Object, Lisp_Object, int);
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244 DEFINE_LRECORD_IMPLEMENTATION ("subr", subr,
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245 this_one_is_unmarkable, print_subr, 0, 0, 0,
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246 struct Lisp_Subr);
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247
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248 static void
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249 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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250 {
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251 struct Lisp_Subr *subr = XSUBR (obj);
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252
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253 if (print_readably)
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254 error ("printing unreadable object #<subr %s>",
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255 subr_name (subr));
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256
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257 write_c_string (((subr->max_args == UNEVALLED)
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258 ? "#<special-form "
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259 : "#<subr "),
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260 printcharfun);
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261
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262 write_c_string (subr_name (subr), printcharfun);
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263 write_c_string (((subr->prompt) ? " (interactive)>" : ">"),
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264 printcharfun);
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265 }
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266
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267
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268 static Lisp_Object mark_compiled_function (Lisp_Object,
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269 void (*) (Lisp_Object));
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270 extern void print_compiled_function (Lisp_Object, Lisp_Object, int);
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271 static int compiled_function_equal (Lisp_Object, Lisp_Object, int);
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272 static unsigned long compiled_function_hash (Lisp_Object obj, int depth);
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273 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("compiled-function", compiled_function,
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274 mark_compiled_function,
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275 print_compiled_function, 0,
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276 compiled_function_equal,
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277 compiled_function_hash,
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278 struct Lisp_Compiled_Function);
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279
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280 static Lisp_Object
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281 mark_compiled_function (Lisp_Object obj, void (*markobj) (Lisp_Object))
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282 {
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283 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (obj);
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284
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285 ((markobj) (b->bytecodes));
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286 ((markobj) (b->arglist));
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287 ((markobj) (b->doc_and_interactive));
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288 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
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289 ((markobj) (b->annotated));
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290 #endif
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291 /* tail-recurse on constants */
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292 return (b->constants);
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293 }
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294
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295 static int
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296 compiled_function_equal (Lisp_Object o1, Lisp_Object o2, int depth)
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297 {
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298 struct Lisp_Compiled_Function *b1 = XCOMPILED_FUNCTION (o1);
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299 struct Lisp_Compiled_Function *b2 = XCOMPILED_FUNCTION (o2);
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300 return (b1->flags.documentationp == b2->flags.documentationp
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301 && b1->flags.interactivep == b2->flags.interactivep
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302 && b1->flags.domainp == b2->flags.domainp /* I18N3 */
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303 && internal_equal (b1->bytecodes, b2->bytecodes, depth + 1)
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304 && internal_equal (b1->constants, b2->constants, depth + 1)
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305 && internal_equal (b1->arglist, b2->arglist, depth + 1)
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306 && internal_equal (b1->doc_and_interactive,
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307 b2->doc_and_interactive, depth + 1));
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308 }
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309
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310 static unsigned long
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311 compiled_function_hash (Lisp_Object obj, int depth)
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312 {
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313 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (obj);
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314 return HASH3 ((b->flags.documentationp << 2) +
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315 (b->flags.interactivep << 1) +
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316 b->flags.domainp,
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317 internal_hash (b->bytecodes, depth + 1),
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318 internal_hash (b->constants, depth + 1));
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319 }
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320
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321
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322 /**********************************************************************/
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323 /* Entering the debugger */
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324 /**********************************************************************/
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325
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326 /* unwind-protect used by call_debugger() to restore the value of
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327 enterring_debugger. (We cannot use specbind() because the
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328 variable is not Lisp-accessible.) */
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329
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330 static Lisp_Object
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331 restore_entering_debugger (Lisp_Object arg)
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332 {
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333 entering_debugger = ((NILP (arg)) ? 0 : 1);
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334 return arg;
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335 }
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336
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337 /* Actually call the debugger. ARG is a list of args that will be
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338 passed to the debugger function, as follows;
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339
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340 If due to frame exit, args are `exit' and the value being returned;
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341 this function's value will be returned instead of that.
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342 If due to error, args are `error' and a list of the args to `signal'.
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343 If due to `apply' or `funcall' entry, one arg, `lambda'.
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344 If due to `eval' entry, one arg, t.
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345
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346 */
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347
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348 static Lisp_Object
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349 call_debugger_259 (Lisp_Object arg)
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350 {
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351 return apply1 (Vdebugger, arg);
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352 }
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353
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354 /* Call the debugger, doing some encapsulation. We make sure we have
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355 some room on the eval and specpdl stacks, and bind enterring_debugger
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356 to 1 during this call. This is used to trap errors that may occur
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357 when enterring the debugger (e.g. the value of `debugger' is invalid),
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358 so that the debugger will not be recursively entered if debug-on-error
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359 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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360 enter the debugger.) enterring_debugger gets reset to 0 as soon
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361 as a backtrace is displayed, so that further errors can indeed be
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362 handled normally.
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363
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364 We also establish a catch for 'debugger. If the debugger function
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365 throws to this instead of returning a value, it means that the user
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366 pressed 'c' (pretend like the debugger was never entered). The
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367 function then returns Qunbound. (If the user pressed 'r', for
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368 return a value, then the debugger function returns normally with
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369 this value.)
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370
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371 The difference between 'c' and 'r' is as follows:
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372
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373 debug-on-call:
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374 No difference. The call proceeds as normal.
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375 debug-on-exit:
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376 With 'r', the specified value is returned as the function's
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377 return value. With 'c', the value that would normally be
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378 returned is returned.
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379 signal:
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380 With 'r', the specified value is returned as the return
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381 value of `signal'. (This is the only time that `signal'
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382 can return, instead of making a non-local exit.) With `c',
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383 `signal' will continue looking for handlers as if the
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384 debugger was never entered, and will probably end up
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385 throwing to a handler or to top-level.
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386 */
|
|
|
387
|
|
|
388 static Lisp_Object
|
|
|
389 call_debugger (Lisp_Object arg)
|
|
|
390 {
|
|
|
391 int threw;
|
|
|
392 Lisp_Object val;
|
|
|
393 int speccount;
|
|
|
394
|
|
|
395 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
396 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
397 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
398 max_specpdl_size = specpdl_size + 40;
|
|
|
399 debug_on_next_call = 0;
|
|
|
400
|
|
|
401 speccount = specpdl_depth_counter;
|
|
|
402 record_unwind_protect (restore_entering_debugger,
|
|
|
403 (entering_debugger ? Qt : Qnil));
|
|
|
404 entering_debugger = 1;
|
|
|
405 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
406
|
|
|
407 return (unbind_to (speccount, ((threw)
|
|
|
408 ? Qunbound /* Not returning a value */
|
|
|
409 : val)));
|
|
|
410 }
|
|
|
411
|
|
|
412 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
413 with the appropriate args for this. VAL is the exit value that is
|
|
|
414 about to be returned. */
|
|
|
415
|
|
|
416 static Lisp_Object
|
|
|
417 do_debug_on_exit (Lisp_Object val)
|
|
|
418 {
|
|
|
419 /* This is falsified by call_debugger */
|
|
|
420 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
94
|
421
|
|
0
|
422 return ((!UNBOUNDP (v)) ? v : val);
|
|
|
423 }
|
|
|
424
|
|
|
425 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
426 with the appropriate args for this. VAL is either t for a call
|
|
|
427 through `eval' or 'lambda for a call through `funcall'.
|
|
|
428
|
|
|
429 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
430 FUNCALL can be defined as
|
|
|
431
|
|
|
432 (defmacro func (fun &rest args)
|
|
|
433 (cons (eval fun) args))
|
|
|
434
|
|
|
435 and should be treated as such.
|
|
|
436 */
|
|
|
437
|
|
|
438 static void
|
|
|
439 do_debug_on_call (Lisp_Object code)
|
|
|
440 {
|
|
|
441 debug_on_next_call = 0;
|
|
|
442 backtrace_list->debug_on_exit = 1;
|
|
|
443 call_debugger (list1 (code));
|
|
|
444 }
|
|
|
445
|
|
|
446 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
447 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
448 and CONDITIONS is the list of error conditions associated with
|
|
|
449 the error being signalled. This returns non-nil if LIST
|
|
|
450 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
451 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
452 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
453 same as one of the symbols in CONDITIONS.) */
|
|
|
454
|
|
|
455 static int
|
|
|
456 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
457 {
|
|
|
458 if (NILP (list))
|
|
|
459 return 0;
|
|
|
460 if (! CONSP (list))
|
|
|
461 return 1;
|
|
|
462
|
|
|
463 while (CONSP (conditions))
|
|
|
464 {
|
|
|
465 Lisp_Object this, tail;
|
|
|
466 this = XCAR (conditions);
|
|
|
467 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
468 if (EQ (XCAR (tail), this))
|
|
|
469 return 1;
|
|
|
470 conditions = XCDR (conditions);
|
|
|
471 }
|
|
|
472 return 0;
|
|
|
473 }
|
|
|
474
|
|
163
|
475
|
|
|
476 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
477 and described by SIGNAL-DATA, should skip the debugger
|
|
|
478 according to debugger-ignore-errors. */
|
|
|
479
|
|
|
480 extern Lisp_Object Frunning_temacs_p();
|
|
|
481
|
|
|
482 static int
|
|
|
483 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
484 {
|
|
|
485 Lisp_Object tail;
|
|
|
486 int first_string = 1;
|
|
|
487 Lisp_Object error_message;
|
|
|
488
|
|
|
489 if (!NILP(Frunning_temacs_p()) || NILP(Vdebug_ignored_errors))
|
|
|
490 {
|
|
|
491 return 1;
|
|
|
492 }
|
|
|
493
|
|
|
494 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
495 {
|
|
|
496 if (STRINGP (XCAR (tail)))
|
|
|
497 {
|
|
|
498 if (first_string)
|
|
|
499 {
|
|
|
500 /* error_message = Ferror_message_string (data);*/
|
|
|
501 error_message = build_string("Tell_Hrvoje");
|
|
|
502 first_string = 0;
|
|
|
503 }
|
|
|
504 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
|
505 return 1;
|
|
|
506 }
|
|
|
507 else
|
|
|
508 {
|
|
|
509 Lisp_Object contail;
|
|
|
510
|
|
|
511 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
|
512 if (EQ (XCAR (tail), XCAR (contail)))
|
|
|
513 return 1;
|
|
|
514 }
|
|
|
515 }
|
|
|
516
|
|
|
517 return 0;
|
|
|
518 }
|
|
|
519
|
|
0
|
520 /* Actually generate a backtrace on STREAM. */
|
|
|
521
|
|
|
522 static Lisp_Object
|
|
|
523 backtrace_259 (Lisp_Object stream)
|
|
|
524 {
|
|
|
525 return (Fbacktrace (stream, Qt));
|
|
|
526 }
|
|
|
527
|
|
|
528 /* An error was signalled. Maybe call the debugger, if the `debug-on-error'
|
|
|
529 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
530 associated with the error being signalled. SIG is the actual error
|
|
|
531 being signalled, and DATA is the associated data (these are exactly
|
|
|
532 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
533 list of error handlers that are to be put in place while the debugger
|
|
|
534 is called. This is generally the remaining handlers that are
|
|
|
535 outside of the innermost handler trapping this error. This way,
|
|
|
536 if the same error occurs inside of the debugger, you usually don't get
|
|
|
537 the debugger entered recursively.
|
|
|
538
|
|
|
539 This function returns Qunbound if it didn't call the debugger or if
|
|
|
540 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
541 debugger was never entered. Otherwise, it returns the value
|
|
|
542 that the user specified with `r'. (Note that much of the time,
|
|
|
543 the user will abort with C-], and we will never have a chance to
|
|
|
544 return anything at all.)
|
|
|
545
|
|
|
546 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
547 and stack-trace-on-signal to control whether we do anything.
|
|
|
548 This is so that debug-on-error doesn't make handled errors
|
|
|
549 cause the debugger to get invoked.
|
|
|
550
|
|
|
551 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
552 those functions aren't done more than once in a single `signal'
|
|
|
553 session. */
|
|
|
554
|
|
|
555 static Lisp_Object
|
|
|
556 signal_call_debugger (Lisp_Object conditions,
|
|
|
557 Lisp_Object sig, Lisp_Object data,
|
|
|
558 Lisp_Object active_handlers,
|
|
|
559 int signal_vars_only,
|
|
|
560 int *stack_trace_displayed,
|
|
|
561 int *debugger_entered)
|
|
|
562 {
|
|
|
563 /* This function can GC */
|
|
|
564 Lisp_Object val = Qunbound;
|
|
|
565 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
566 int speccount = specpdl_depth_counter;
|
|
163
|
567 int skip_debugger_for_error = 0;
|
|
0
|
568 struct gcpro gcpro1;
|
|
|
569 GCPRO1 (all_handlers);
|
|
|
570
|
|
|
571 Vcondition_handlers = active_handlers;
|
|
|
572
|
|
163
|
573 skip_debugger_for_error = skip_debugger (conditions, Fcons (sig, data));
|
|
|
574
|
|
|
575 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
576 && !skip_debugger_for_error
|
|
0
|
577 && wants_debugger (Vstack_trace_on_error, conditions))
|
|
|
578 {
|
|
|
579 specbind (Qdebug_on_error, Qnil);
|
|
|
580 specbind (Qstack_trace_on_error, Qnil);
|
|
|
581 specbind (Qdebug_on_signal, Qnil);
|
|
|
582 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
583
|
|
|
584 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
585 backtrace_259,
|
|
|
586 Qnil,
|
|
|
587 Qnil);
|
|
|
588 unbind_to (speccount, Qnil);
|
|
|
589 *stack_trace_displayed = 1;
|
|
|
590 }
|
|
|
591
|
|
|
592 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
163
|
593 && !skip_debugger_for_error
|
|
0
|
594 && (EQ (sig, Qquit)
|
|
|
595 ? debug_on_quit
|
|
|
596 : wants_debugger (Vdebug_on_error, conditions)))
|
|
|
597 {
|
|
|
598 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
599 specbind (Qdebug_on_error, Qnil);
|
|
|
600 specbind (Qstack_trace_on_error, Qnil);
|
|
|
601 specbind (Qdebug_on_signal, Qnil);
|
|
|
602 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
603
|
|
|
604 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
605 *debugger_entered = 1;
|
|
|
606 }
|
|
|
607
|
|
|
608 if (!entering_debugger && !*stack_trace_displayed
|
|
|
609 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
610 {
|
|
|
611 specbind (Qdebug_on_error, Qnil);
|
|
|
612 specbind (Qstack_trace_on_error, Qnil);
|
|
|
613 specbind (Qdebug_on_signal, Qnil);
|
|
|
614 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
615
|
|
|
616 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
617 backtrace_259,
|
|
|
618 Qnil,
|
|
|
619 Qnil);
|
|
|
620 unbind_to (speccount, Qnil);
|
|
|
621 *stack_trace_displayed = 1;
|
|
|
622 }
|
|
|
623
|
|
|
624 if (!entering_debugger && !*debugger_entered
|
|
|
625 && (EQ (sig, Qquit)
|
|
|
626 ? debug_on_quit
|
|
|
627 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
628 {
|
|
|
629 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
630 specbind (Qdebug_on_error, Qnil);
|
|
|
631 specbind (Qstack_trace_on_error, Qnil);
|
|
|
632 specbind (Qdebug_on_signal, Qnil);
|
|
|
633 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
634
|
|
|
635 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
636 *debugger_entered = 1;
|
|
|
637 }
|
|
|
638
|
|
|
639 UNGCPRO;
|
|
|
640 Vcondition_handlers = all_handlers;
|
|
|
641 return (unbind_to (speccount, val));
|
|
|
642 }
|
|
|
643
|
|
|
644
|
|
|
645 /**********************************************************************/
|
|
|
646 /* The basic special forms */
|
|
|
647 /**********************************************************************/
|
|
|
648
|
|
|
649 /* NOTE!!! Every function that can call EVAL must protect its args
|
|
|
650 and temporaries from garbage collection while it needs them.
|
|
|
651 The definition of `For' shows what you have to do. */
|
|
|
652
|
|
20
|
653 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
654 Eval args until one of them yields non-nil, then return that value.
|
|
|
655 The remaining args are not evalled at all.
|
|
|
656 If all args return nil, return nil.
|
|
20
|
657 */
|
|
|
658 (args))
|
|
0
|
659 {
|
|
|
660 /* This function can GC */
|
|
|
661 REGISTER Lisp_Object val;
|
|
|
662 Lisp_Object args_left;
|
|
|
663 struct gcpro gcpro1;
|
|
|
664
|
|
|
665 if (NILP (args))
|
|
|
666 return Qnil;
|
|
|
667
|
|
|
668 args_left = args;
|
|
|
669 GCPRO1 (args_left);
|
|
|
670
|
|
|
671 do
|
|
|
672 {
|
|
|
673 val = Feval (Fcar (args_left));
|
|
|
674 if (!NILP (val))
|
|
|
675 break;
|
|
|
676 args_left = Fcdr (args_left);
|
|
|
677 }
|
|
|
678 while (!NILP (args_left));
|
|
|
679
|
|
|
680 UNGCPRO;
|
|
|
681 return val;
|
|
|
682 }
|
|
|
683
|
|
20
|
684 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
685 Eval args until one of them yields nil, then return nil.
|
|
|
686 The remaining args are not evalled at all.
|
|
|
687 If no arg yields nil, return the last arg's value.
|
|
20
|
688 */
|
|
|
689 (args))
|
|
0
|
690 {
|
|
|
691 /* This function can GC */
|
|
|
692 REGISTER Lisp_Object val;
|
|
|
693 Lisp_Object args_left;
|
|
|
694 struct gcpro gcpro1;
|
|
|
695
|
|
|
696 if (NILP (args))
|
|
|
697 return Qt;
|
|
|
698
|
|
|
699 args_left = args;
|
|
|
700 GCPRO1 (args_left);
|
|
|
701
|
|
|
702 do
|
|
|
703 {
|
|
|
704 val = Feval (Fcar (args_left));
|
|
|
705 if (NILP (val))
|
|
|
706 break;
|
|
|
707 args_left = Fcdr (args_left);
|
|
|
708 }
|
|
|
709 while (!NILP (args_left));
|
|
|
710
|
|
|
711 UNGCPRO;
|
|
|
712 return val;
|
|
|
713 }
|
|
|
714
|
|
20
|
715 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
0
|
716 (if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
717 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
718 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
719 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
720 */
|
|
70
|
721 (args))
|
|
0
|
722 {
|
|
|
723 /* This function can GC */
|
|
|
724 Lisp_Object cond;
|
|
|
725 struct gcpro gcpro1;
|
|
|
726
|
|
|
727 GCPRO1 (args);
|
|
|
728 cond = Feval (Fcar (args));
|
|
|
729 UNGCPRO;
|
|
|
730
|
|
|
731 if (!NILP (cond))
|
|
|
732 return Feval (Fcar (Fcdr (args)));
|
|
|
733 return Fprogn (Fcdr (Fcdr (args)));
|
|
|
734 }
|
|
|
735
|
|
20
|
736 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
737 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
738 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
739 and, if the value is non-nil, this clause succeeds:
|
|
|
740 then the expressions in BODY are evaluated and the last one's
|
|
|
741 value is the value of the cond-form.
|
|
|
742 If no clause succeeds, cond returns nil.
|
|
|
743 If a clause has one element, as in (CONDITION),
|
|
|
744 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
745 */
|
|
|
746 (args))
|
|
0
|
747 {
|
|
|
748 /* This function can GC */
|
|
|
749 REGISTER Lisp_Object clause, val;
|
|
|
750 struct gcpro gcpro1;
|
|
|
751
|
|
|
752 val = Qnil;
|
|
|
753 GCPRO1 (args);
|
|
|
754 while (!NILP (args))
|
|
|
755 {
|
|
|
756 clause = Fcar (args);
|
|
|
757 val = Feval (Fcar (clause));
|
|
|
758 if (!NILP (val))
|
|
|
759 {
|
|
|
760 if (!EQ (XCDR (clause), Qnil))
|
|
|
761 val = Fprogn (XCDR (clause));
|
|
|
762 break;
|
|
|
763 }
|
|
|
764 args = XCDR (args);
|
|
|
765 }
|
|
|
766 UNGCPRO;
|
|
|
767
|
|
|
768 return val;
|
|
|
769 }
|
|
|
770
|
|
20
|
771 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
0
|
772 (progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
773 */
|
|
|
774 (args))
|
|
0
|
775 {
|
|
|
776 /* This function can GC */
|
|
|
777 REGISTER Lisp_Object val;
|
|
|
778 Lisp_Object args_left;
|
|
|
779 struct gcpro gcpro1;
|
|
|
780
|
|
|
781 if (NILP (args))
|
|
|
782 return Qnil;
|
|
|
783
|
|
|
784 args_left = args;
|
|
|
785 GCPRO1 (args_left);
|
|
|
786
|
|
|
787 do
|
|
|
788 {
|
|
|
789 val = Feval (Fcar (args_left));
|
|
|
790 args_left = Fcdr (args_left);
|
|
|
791 }
|
|
|
792 while (!NILP (args_left));
|
|
|
793
|
|
|
794 UNGCPRO;
|
|
|
795 return val;
|
|
|
796 }
|
|
|
797
|
|
20
|
798 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
0
|
799 (prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.
|
|
|
800 The value of FIRST is saved during the evaluation of the remaining args,
|
|
|
801 whose values are discarded.
|
|
20
|
802 */
|
|
|
803 (args))
|
|
0
|
804 {
|
|
|
805 /* This function can GC */
|
|
|
806 Lisp_Object val;
|
|
|
807 REGISTER Lisp_Object args_left;
|
|
|
808 struct gcpro gcpro1, gcpro2;
|
|
|
809 REGISTER int argnum = 0;
|
|
|
810
|
|
|
811 if (NILP (args))
|
|
|
812 return Qnil;
|
|
|
813
|
|
|
814 args_left = args;
|
|
|
815 val = Qnil;
|
|
|
816 GCPRO2 (args, val);
|
|
|
817
|
|
|
818 do
|
|
|
819 {
|
|
|
820 if (!(argnum++))
|
|
|
821 val = Feval (Fcar (args_left));
|
|
|
822 else
|
|
|
823 Feval (Fcar (args_left));
|
|
|
824 args_left = Fcdr (args_left);
|
|
|
825 }
|
|
|
826 while (!NILP (args_left));
|
|
|
827
|
|
|
828 UNGCPRO;
|
|
|
829 return val;
|
|
|
830 }
|
|
|
831
|
|
20
|
832 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
0
|
833 (prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.
|
|
|
834 The value of Y is saved during the evaluation of the remaining args,
|
|
|
835 whose values are discarded.
|
|
20
|
836 */
|
|
|
837 (args))
|
|
0
|
838 {
|
|
|
839 /* This function can GC */
|
|
|
840 Lisp_Object val;
|
|
|
841 REGISTER Lisp_Object args_left;
|
|
|
842 struct gcpro gcpro1, gcpro2;
|
|
|
843 REGISTER int argnum = -1;
|
|
|
844
|
|
|
845 val = Qnil;
|
|
|
846
|
|
|
847 if (NILP (args))
|
|
|
848 return Qnil;
|
|
|
849
|
|
|
850 args_left = args;
|
|
|
851 val = Qnil;
|
|
|
852 GCPRO2 (args, val);
|
|
|
853
|
|
|
854 do
|
|
|
855 {
|
|
|
856 if (!(argnum++))
|
|
|
857 val = Feval (Fcar (args_left));
|
|
|
858 else
|
|
|
859 Feval (Fcar (args_left));
|
|
|
860 args_left = Fcdr (args_left);
|
|
|
861 }
|
|
|
862 while (!NILP (args_left));
|
|
|
863
|
|
|
864 UNGCPRO;
|
|
|
865 return val;
|
|
|
866 }
|
|
|
867
|
|
20
|
868 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
0
|
869 (let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
870 The value of the last form in BODY is returned.
|
|
|
871 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
872 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
873 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
874 */
|
|
|
875 (args))
|
|
0
|
876 {
|
|
|
877 /* This function can GC */
|
|
|
878 Lisp_Object varlist, val, elt;
|
|
|
879 int speccount = specpdl_depth_counter;
|
|
|
880 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
881
|
|
|
882 GCPRO3 (args, elt, varlist);
|
|
|
883
|
|
|
884 varlist = Fcar (args);
|
|
|
885 while (!NILP (varlist))
|
|
|
886 {
|
|
|
887 QUIT;
|
|
|
888 elt = Fcar (varlist);
|
|
|
889 if (SYMBOLP (elt))
|
|
|
890 specbind (elt, Qnil);
|
|
|
891 else if (! NILP (Fcdr (Fcdr (elt))))
|
|
|
892 signal_simple_error ("`let' bindings can have only one value-form",
|
|
|
893 elt);
|
|
|
894 else
|
|
|
895 {
|
|
|
896 val = Feval (Fcar (Fcdr (elt)));
|
|
|
897 specbind (Fcar (elt), val);
|
|
|
898 }
|
|
|
899 varlist = Fcdr (varlist);
|
|
|
900 }
|
|
|
901 UNGCPRO;
|
|
|
902 val = Fprogn (Fcdr (args));
|
|
|
903 return unbind_to (speccount, val);
|
|
|
904 }
|
|
|
905
|
|
20
|
906 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
0
|
907 (let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
908 The value of the last form in BODY is returned.
|
|
|
909 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
910 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
911 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
912 */
|
|
|
913 (args))
|
|
0
|
914 {
|
|
|
915 /* This function can GC */
|
|
|
916 Lisp_Object *temps, tem;
|
|
|
917 REGISTER Lisp_Object elt, varlist;
|
|
|
918 int speccount = specpdl_depth_counter;
|
|
|
919 REGISTER int argnum;
|
|
|
920 struct gcpro gcpro1, gcpro2;
|
|
|
921
|
|
|
922 varlist = Fcar (args);
|
|
|
923
|
|
|
924 /* Make space to hold the values to give the bound variables */
|
|
|
925 elt = Flength (varlist);
|
|
|
926 temps = (Lisp_Object *) alloca (XINT (elt) * sizeof (Lisp_Object));
|
|
|
927
|
|
|
928 /* Compute the values and store them in `temps' */
|
|
|
929
|
|
|
930 GCPRO2 (args, *temps);
|
|
|
931 gcpro2.nvars = 0;
|
|
|
932
|
|
|
933 for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
|
|
|
934 {
|
|
|
935 QUIT;
|
|
|
936 elt = Fcar (varlist);
|
|
|
937 if (SYMBOLP (elt))
|
|
|
938 temps [argnum++] = Qnil;
|
|
|
939 else if (! NILP (Fcdr (Fcdr (elt))))
|
|
|
940 signal_simple_error ("`let' bindings can have only one value-form",
|
|
|
941 elt);
|
|
|
942 else
|
|
|
943 temps [argnum++] = Feval (Fcar (Fcdr (elt)));
|
|
|
944 gcpro2.nvars = argnum;
|
|
|
945 }
|
|
|
946 UNGCPRO;
|
|
|
947
|
|
|
948 varlist = Fcar (args);
|
|
|
949 for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
|
|
|
950 {
|
|
|
951 elt = Fcar (varlist);
|
|
|
952 tem = temps[argnum++];
|
|
|
953 if (SYMBOLP (elt))
|
|
|
954 specbind (elt, tem);
|
|
|
955 else
|
|
|
956 specbind (Fcar (elt), tem);
|
|
|
957 }
|
|
|
958
|
|
|
959 elt = Fprogn (Fcdr (args));
|
|
|
960 return unbind_to (speccount, elt);
|
|
|
961 }
|
|
|
962
|
|
20
|
963 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
0
|
964 (while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
965 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
966 until TEST returns nil.
|
|
20
|
967 */
|
|
70
|
968 (args))
|
|
0
|
969 {
|
|
|
970 /* This function can GC */
|
|
|
971 Lisp_Object test, body, tem;
|
|
|
972 struct gcpro gcpro1, gcpro2;
|
|
|
973
|
|
|
974 GCPRO2 (test, body);
|
|
|
975
|
|
|
976 test = Fcar (args);
|
|
|
977 body = Fcdr (args);
|
|
|
978 while (tem = Feval (test), !NILP (tem))
|
|
|
979 {
|
|
|
980 QUIT;
|
|
|
981 Fprogn (body);
|
|
|
982 }
|
|
|
983
|
|
|
984 UNGCPRO;
|
|
|
985 return Qnil;
|
|
|
986 }
|
|
|
987
|
|
|
988 Lisp_Object Qsetq;
|
|
|
989
|
|
20
|
990 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
0
|
991 (setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
992 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
993 The values VAL are expressions; they are evaluated.
|
|
|
994 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
995 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
996 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
997 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
998 */
|
|
|
999 (args))
|
|
0
|
1000 {
|
|
|
1001 /* This function can GC */
|
|
|
1002 REGISTER Lisp_Object args_left;
|
|
|
1003 REGISTER Lisp_Object val, sym;
|
|
|
1004 struct gcpro gcpro1;
|
|
|
1005
|
|
|
1006 if (NILP (args))
|
|
|
1007 return Qnil;
|
|
|
1008
|
|
|
1009 val = Flength (args);
|
|
|
1010 if (XINT (val) & 1) /* Odd number of arguments? */
|
|
|
1011 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, val));
|
|
|
1012
|
|
|
1013 args_left = args;
|
|
|
1014 GCPRO1 (args);
|
|
|
1015
|
|
|
1016 do
|
|
|
1017 {
|
|
|
1018 val = Feval (Fcar (Fcdr (args_left)));
|
|
|
1019 sym = Fcar (args_left);
|
|
|
1020 Fset (sym, val);
|
|
|
1021 args_left = Fcdr (Fcdr (args_left));
|
|
|
1022 }
|
|
|
1023 while (!NILP (args_left));
|
|
|
1024
|
|
|
1025 UNGCPRO;
|
|
|
1026 return val;
|
|
|
1027 }
|
|
|
1028
|
|
20
|
1029 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
1030 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
1031 */
|
|
|
1032 (args))
|
|
0
|
1033 {
|
|
|
1034 return Fcar (args);
|
|
|
1035 }
|
|
|
1036
|
|
20
|
1037 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
1038 Like `quote', but preferred for objects which are functions.
|
|
|
1039 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1040 `quote' cannot do that.
|
|
20
|
1041 */
|
|
|
1042 (args))
|
|
0
|
1043 {
|
|
|
1044 return Fcar (args);
|
|
|
1045 }
|
|
|
1046
|
|
|
1047
|
|
|
1048 /**********************************************************************/
|
|
|
1049 /* Defining functions/variables */
|
|
|
1050 /**********************************************************************/
|
|
|
1051
|
|
20
|
1052 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
0
|
1053 (defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1054 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1055 See also the function `interactive'.
|
|
20
|
1056 */
|
|
|
1057 (args))
|
|
0
|
1058 {
|
|
|
1059 /* This function can GC */
|
|
|
1060 Lisp_Object fn_name;
|
|
|
1061 Lisp_Object defn;
|
|
|
1062
|
|
|
1063 fn_name = Fcar (args);
|
|
|
1064 defn = Fcons (Qlambda, Fcdr (args));
|
|
|
1065 if (purify_flag)
|
|
|
1066 defn = Fpurecopy (defn);
|
|
|
1067 Ffset (fn_name, defn);
|
|
|
1068 LOADHIST_ATTACH (fn_name);
|
|
|
1069 return fn_name;
|
|
|
1070 }
|
|
|
1071
|
|
20
|
1072 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
0
|
1073 (defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1074 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1075 When the macro is called, as in (NAME ARGS...),
|
|
|
1076 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1077 the list ARGS... as it appears in the expression,
|
|
|
1078 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1079 */
|
|
|
1080 (args))
|
|
0
|
1081 {
|
|
|
1082 /* This function can GC */
|
|
|
1083 Lisp_Object fn_name;
|
|
|
1084 Lisp_Object defn;
|
|
|
1085
|
|
|
1086 fn_name = Fcar (args);
|
|
|
1087 defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args)));
|
|
|
1088 if (purify_flag)
|
|
|
1089 defn = Fpurecopy (defn);
|
|
|
1090 Ffset (fn_name, defn);
|
|
|
1091 LOADHIST_ATTACH (fn_name);
|
|
|
1092 return fn_name;
|
|
|
1093 }
|
|
|
1094
|
|
20
|
1095 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
0
|
1096 (defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1097 You are not required to define a variable in order to use it,
|
|
|
1098 but the definition can supply documentation and an initial value
|
|
|
1099 in a way that tags can recognize.
|
|
|
1100
|
|
|
1101 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1102 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1103 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1104 void.)
|
|
|
1105 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1106 buffer-local values are not affected.
|
|
|
1107 INITVALUE and DOCSTRING are optional.
|
|
|
1108 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1109 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1110 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1111
|
|
|
1112 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1113 */
|
|
|
1114 (args))
|
|
0
|
1115 {
|
|
|
1116 /* This function can GC */
|
|
|
1117 REGISTER Lisp_Object sym, tem, tail;
|
|
|
1118
|
|
|
1119 sym = Fcar (args);
|
|
|
1120 tail = Fcdr (args);
|
|
|
1121 if (!NILP (Fcdr (Fcdr (tail))))
|
|
|
1122 error ("too many arguments");
|
|
|
1123
|
|
|
1124 if (!NILP (tail))
|
|
|
1125 {
|
|
|
1126 tem = Fdefault_boundp (sym);
|
|
|
1127 if (NILP (tem))
|
|
|
1128 Fset_default (sym, Feval (Fcar (Fcdr (args))));
|
|
|
1129 }
|
|
|
1130
|
|
|
1131 #ifdef I18N3
|
|
|
1132 if (!NILP (Vfile_domain))
|
|
|
1133 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1134 #endif
|
|
|
1135
|
|
|
1136 tail = Fcdr (Fcdr (args));
|
|
|
1137 if (!NILP (Fcar (tail)))
|
|
|
1138 {
|
|
|
1139 tem = Fcar (tail);
|
|
|
1140 #if 0 /* FSFmacs */
|
|
|
1141 /* #### We should probably do this but it might be dangerous */
|
|
|
1142 if (purify_flag)
|
|
|
1143 tem = Fpurecopy (tem);
|
|
|
1144 Fput (sym, Qvariable_documentation, tem);
|
|
|
1145 #else
|
|
|
1146 pure_put (sym, Qvariable_documentation, tem);
|
|
|
1147 #endif
|
|
|
1148 }
|
|
|
1149
|
|
|
1150 LOADHIST_ATTACH (sym);
|
|
|
1151 return sym;
|
|
|
1152 }
|
|
|
1153
|
|
20
|
1154 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
0
|
1155 (defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1156 variable.
|
|
|
1157 The intent is that programs do not change this value, but users may.
|
|
|
1158 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1159 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1160 buffer-local values are not affected.
|
|
|
1161 DOCSTRING is optional.
|
|
|
1162 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1163 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1164
|
|
|
1165 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1166 normally loaded, since it is useful for users to be able to specify
|
|
|
1167 their own values for such variables before loading the library.
|
|
|
1168 Since `defconst' unconditionally assigns the variable,
|
|
|
1169 it would override the user's choice.
|
|
20
|
1170 */
|
|
|
1171 (args))
|
|
0
|
1172 {
|
|
|
1173 /* This function can GC */
|
|
|
1174 REGISTER Lisp_Object sym, tem;
|
|
|
1175
|
|
|
1176 sym = Fcar (args);
|
|
|
1177 if (!NILP (Fcdr (Fcdr (Fcdr (args)))))
|
|
|
1178 error ("too many arguments");
|
|
|
1179
|
|
|
1180 Fset_default (sym, Feval (Fcar (Fcdr (args))));
|
|
|
1181
|
|
|
1182 #ifdef I18N3
|
|
|
1183 if (!NILP (Vfile_domain))
|
|
|
1184 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1185 #endif
|
|
|
1186
|
|
|
1187 tem = Fcar (Fcdr (Fcdr (args)));
|
|
|
1188
|
|
|
1189 if (!NILP (tem))
|
|
|
1190 #if 0 /* FSFmacs */
|
|
|
1191 /* #### We should probably do this but it might be dangerous */
|
|
|
1192 {
|
|
|
1193 if (purify_flag)
|
|
|
1194 tem = Fpurecopy (tem);
|
|
|
1195 Fput (sym, Qvariable_documentation, tem);
|
|
|
1196 }
|
|
|
1197 #else
|
|
|
1198 pure_put (sym, Qvariable_documentation, tem);
|
|
|
1199 #endif
|
|
|
1200
|
|
|
1201 LOADHIST_ATTACH (sym);
|
|
|
1202 return sym;
|
|
|
1203 }
|
|
|
1204
|
|
20
|
1205 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1206 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1207 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1208 Determined by whether the first character of the documentation
|
|
|
1209 for the variable is `*'.
|
|
20
|
1210 */
|
|
|
1211 (variable))
|
|
0
|
1212 {
|
|
|
1213 Lisp_Object documentation;
|
|
|
1214
|
|
|
1215 documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1216 if (INTP (documentation) && XINT (documentation) < 0)
|
|
|
1217 return Qt;
|
|
|
1218 if ((STRINGP (documentation)) &&
|
|
|
1219 (string_byte (XSTRING (documentation), 0) == '*'))
|
|
|
1220 return Qt;
|
|
|
1221 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1222 if (CONSP (documentation)
|
|
|
1223 && STRINGP (XCAR (documentation))
|
|
|
1224 && INTP (XCDR (documentation))
|
|
|
1225 && XINT (XCDR (documentation)) < 0)
|
|
|
1226 return Qt;
|
|
|
1227 return Qnil;
|
|
|
1228 }
|
|
|
1229
|
|
20
|
1230 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1231 Return result of expanding macros at top level of FORM.
|
|
|
1232 If FORM is not a macro call, it is returned unchanged.
|
|
|
1233 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1234 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1235
|
|
|
1236 The second optional arg ENVIRONMENT species an environment of macro
|
|
|
1237 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1238 */
|
|
|
1239 (form, env))
|
|
0
|
1240 {
|
|
|
1241 /* This function can GC */
|
|
|
1242 /* With cleanups from Hallvard Furuseth. */
|
|
|
1243 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1244
|
|
|
1245 while (1)
|
|
|
1246 {
|
|
|
1247 /* Come back here each time we expand a macro call,
|
|
|
1248 in case it expands into another macro call. */
|
|
|
1249 if (!CONSP (form))
|
|
|
1250 break;
|
|
|
1251 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1252 def = sym = XCAR (form);
|
|
|
1253 tem = Qnil;
|
|
|
1254 /* Trace symbols aliases to other symbols
|
|
|
1255 until we get a symbol that is not an alias. */
|
|
|
1256 while (SYMBOLP (def))
|
|
|
1257 {
|
|
|
1258 QUIT;
|
|
|
1259 sym = def;
|
|
|
1260 tem = Fassq (sym, env);
|
|
|
1261 if (NILP (tem))
|
|
|
1262 {
|
|
|
1263 def = XSYMBOL (sym)->function;
|
|
|
1264 if (!UNBOUNDP (def))
|
|
|
1265 continue;
|
|
|
1266 }
|
|
|
1267 break;
|
|
|
1268 }
|
|
|
1269 /* Right now TEM is the result from SYM in ENV,
|
|
|
1270 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1271 if (NILP (tem))
|
|
|
1272 {
|
|
|
1273 /* SYM is not mentioned in ENV.
|
|
|
1274 Look at its function definition. */
|
|
|
1275 if (UNBOUNDP (def)
|
|
|
1276 || !CONSP (def))
|
|
|
1277 /* Not defined or definition not suitable */
|
|
|
1278 break;
|
|
|
1279 if (EQ (XCAR (def), Qautoload))
|
|
|
1280 {
|
|
|
1281 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1282 tem = Felt (def, make_int (4));
|
|
|
1283 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1284 {
|
|
|
1285 /* Yes, load it and try again. */
|
|
|
1286 do_autoload (def, sym);
|
|
|
1287 continue;
|
|
|
1288 }
|
|
|
1289 else
|
|
|
1290 break;
|
|
|
1291 }
|
|
|
1292 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1293 break;
|
|
|
1294 else expander = XCDR (def);
|
|
|
1295 }
|
|
|
1296 else
|
|
|
1297 {
|
|
|
1298 expander = XCDR (tem);
|
|
|
1299 if (NILP (expander))
|
|
|
1300 break;
|
|
|
1301 }
|
|
|
1302 form = apply1 (expander, XCDR (form));
|
|
|
1303 }
|
|
|
1304 return form;
|
|
|
1305 }
|
|
|
1306
|
|
|
1307
|
|
|
1308 /**********************************************************************/
|
|
|
1309 /* Non-local exits */
|
|
|
1310 /**********************************************************************/
|
|
|
1311
|
|
20
|
1312 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
0
|
1313 (catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1314 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1315 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1316 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1317 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1318 */
|
|
|
1319 (args))
|
|
0
|
1320 {
|
|
|
1321 /* This function can GC */
|
|
|
1322 Lisp_Object tag;
|
|
|
1323 struct gcpro gcpro1;
|
|
|
1324
|
|
|
1325 GCPRO1 (args);
|
|
|
1326 tag = Feval (Fcar (args));
|
|
|
1327 UNGCPRO;
|
|
|
1328 return internal_catch (tag, Fprogn, Fcdr (args), 0);
|
|
|
1329 }
|
|
|
1330
|
|
|
1331 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1332 FUNC should return a Lisp_Object.
|
|
|
1333 This is how catches are done from within C code. */
|
|
|
1334
|
|
|
1335 Lisp_Object
|
|
|
1336 internal_catch (Lisp_Object tag,
|
|
|
1337 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1338 Lisp_Object arg,
|
|
|
1339 int *threw)
|
|
|
1340 {
|
|
|
1341 /* This structure is made part of the chain `catchlist'. */
|
|
|
1342 struct catchtag c;
|
|
|
1343
|
|
|
1344 /* Fill in the components of c, and put it on the list. */
|
|
|
1345 c.next = catchlist;
|
|
|
1346 c.tag = tag;
|
|
|
1347 c.val = Qnil;
|
|
|
1348 c.backlist = backtrace_list;
|
|
|
1349 #if 0 /* FSFmacs */
|
|
|
1350 /* #### */
|
|
|
1351 c.handlerlist = handlerlist;
|
|
|
1352 #endif
|
|
|
1353 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1354 c.pdlcount = specpdl_depth_counter;
|
|
|
1355 #if 0 /* FSFmacs */
|
|
|
1356 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1357 #endif
|
|
|
1358 c.gcpro = gcprolist;
|
|
|
1359 catchlist = &c;
|
|
|
1360
|
|
|
1361 /* Call FUNC. */
|
|
|
1362 if (SETJMP (c.jmp))
|
|
|
1363 {
|
|
|
1364 /* Throw works by a longjmp that comes right here. */
|
|
|
1365 if (threw) *threw = 1;
|
|
|
1366 return (c.val);
|
|
|
1367 }
|
|
|
1368 c.val = (*func) (arg);
|
|
|
1369 if (threw) *threw = 0;
|
|
|
1370 catchlist = c.next;
|
|
|
1371 return (c.val);
|
|
|
1372 }
|
|
|
1373
|
|
|
1374
|
|
|
1375 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1376 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1377
|
|
|
1378 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1379 they choose the catch tag to throw to. A catch tag for a
|
|
|
1380 condition-case form has a TAG of Qnil.
|
|
|
1381
|
|
|
1382 Before each catch is discarded, unbind all special bindings and
|
|
|
1383 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1384 the handler stack as we go, so that the proper handlers are in
|
|
|
1385 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1386 some static info saved in CATCH, and longjmp to the location
|
|
|
1387 specified in the
|
|
|
1388
|
|
|
1389 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1390
|
|
|
1391 static void
|
|
|
1392 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1393 {
|
|
|
1394 #if 0 /* FSFmacs */
|
|
|
1395 /* #### */
|
|
|
1396 register int last_time;
|
|
|
1397 #endif
|
|
|
1398
|
|
|
1399 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1400 Before each catch is discarded, unbind all special bindings
|
|
|
1401 and execute all unwind-protect clauses made above that catch.
|
|
|
1402 At the end, restore some static info saved in CATCH,
|
|
|
1403 and longjmp to the location specified.
|
|
|
1404 */
|
|
|
1405
|
|
|
1406 /* Save the value somewhere it will be GC'ed.
|
|
|
1407 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1408 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1409 c->val = val;
|
|
|
1410
|
|
|
1411 #if 0 /* FSFmacs */
|
|
|
1412 /* Restore the polling-suppression count. */
|
|
|
1413 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1414 #endif
|
|
|
1415
|
|
|
1416 #if 0 /* FSFmacs */
|
|
|
1417 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1418 do
|
|
|
1419 {
|
|
|
1420 last_time = catchlist == c;
|
|
|
1421
|
|
|
1422 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1423 handlers. */
|
|
|
1424 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1425 handlerlist = catchlist->handlerlist;
|
|
|
1426 catchlist = catchlist->next;
|
|
|
1427 }
|
|
|
1428 while (! last_time);
|
|
|
1429 #else /* Actual XEmacs code */
|
|
|
1430 /* Unwind the specpdl stack */
|
|
|
1431 unbind_to (c->pdlcount, Qnil);
|
|
|
1432 catchlist = c->next;
|
|
|
1433 #endif
|
|
|
1434
|
|
|
1435 gcprolist = c->gcpro;
|
|
|
1436 backtrace_list = c->backlist;
|
|
|
1437 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1438
|
|
|
1439 throw_level = 0;
|
|
|
1440 LONGJMP (c->jmp, 1);
|
|
|
1441 }
|
|
|
1442
|
|
|
1443 static DOESNT_RETURN
|
|
|
1444 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1445 Lisp_Object sig, Lisp_Object data)
|
|
|
1446 {
|
|
|
1447 /* die if we recurse more than is reasonable */
|
|
|
1448 if (++throw_level > 20)
|
|
|
1449 abort();
|
|
|
1450
|
|
|
1451 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1452 "last resort" when there is no handler for this error and
|
|
|
1453 the debugger couldn't be invoked, so we are throwing to
|
|
|
1454 'top-level. If this tag doesn't exist (happens during the
|
|
|
1455 initialization stages) we would get in an infinite recursive
|
|
|
1456 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1457 really-early-error-handler.
|
|
|
1458
|
|
|
1459 Note that in fact the only time that the "last resort"
|
|
|
1460 occurs is when there's no catch for 'top-level -- the
|
|
|
1461 'top-level catch and the catch-all error handler are
|
|
|
1462 established at the same time, in initial_command_loop/
|
|
|
1463 top_level_1.
|
|
|
1464
|
|
|
1465 #### Fix this horrifitude!
|
|
|
1466 */
|
|
|
1467
|
|
|
1468 while (1)
|
|
|
1469 {
|
|
|
1470 REGISTER struct catchtag *c;
|
|
|
1471
|
|
|
1472 #if 0 /* FSFmacs */
|
|
|
1473 if (!NILP (tag)) /* #### */
|
|
|
1474 #endif
|
|
|
1475 for (c = catchlist; c; c = c->next)
|
|
|
1476 {
|
|
|
1477 if (EQ (c->tag, tag))
|
|
|
1478 unwind_to_catch (c, val);
|
|
|
1479 }
|
|
|
1480 if (!bomb_out_p)
|
|
|
1481 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1482 else
|
|
|
1483 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1484 }
|
|
|
1485
|
|
|
1486 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1487 /* throw_level--; */
|
|
|
1488 /* getting tired of compilation warnings */
|
|
|
1489 /* return Qnil; */
|
|
|
1490 }
|
|
|
1491
|
|
|
1492 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1493 Fthrow() works.
|
|
|
1494
|
|
|
1495 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1496 back to the appropriate condition-case handler after (maybe)
|
|
|
1497 the debugger is entered. In that case, TAG is the value
|
|
|
1498 of Vcondition_handlers that was in place just after the
|
|
|
1499 condition-case handler was set up. The car of this will be
|
|
|
1500 some data referring to the handler: Its car will be Qunbound
|
|
|
1501 (thus, this tag can never be generated by Lisp code), and
|
|
|
1502 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1503 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1504 This works fine because Fthrow() does not care what TAG was
|
|
|
1505 passed to it: it just looks up the catch list for something
|
|
|
1506 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1507 back to the place that established the catch (in this case,
|
|
|
1508 condition_case_1). See below for more info.
|
|
|
1509 */
|
|
|
1510
|
|
20
|
1511 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
0
|
1512 (throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
|
1513 Both TAG and VALUE are evalled.
|
|
20
|
1514 */
|
|
|
1515 (tag, val))
|
|
0
|
1516 {
|
|
|
1517 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1518 return Qnil;
|
|
|
1519 }
|
|
|
1520
|
|
20
|
1521 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1522 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1523 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1524 If BODYFORM completes normally, its value is returned
|
|
|
1525 after executing the UNWINDFORMS.
|
|
|
1526 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1527 */
|
|
|
1528 (args))
|
|
0
|
1529 {
|
|
|
1530 /* This function can GC */
|
|
|
1531 Lisp_Object val;
|
|
|
1532 int speccount = specpdl_depth_counter;
|
|
|
1533
|
|
|
1534 record_unwind_protect (Fprogn, Fcdr (args));
|
|
|
1535 val = Feval (Fcar (args));
|
|
|
1536 return unbind_to (speccount, val);
|
|
|
1537 }
|
|
|
1538
|
|
|
1539
|
|
|
1540 /**********************************************************************/
|
|
|
1541 /* Signalling and trapping errors */
|
|
|
1542 /**********************************************************************/
|
|
|
1543
|
|
|
1544 static Lisp_Object
|
|
|
1545 condition_bind_unwind (Lisp_Object loser)
|
|
|
1546 {
|
|
|
1547 struct Lisp_Cons *victim;
|
|
|
1548 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1549 Lisp_Object tem = XCAR (loser);
|
|
|
1550
|
|
|
1551 while (CONSP (tem))
|
|
|
1552 {
|
|
|
1553 victim = XCONS (tem);
|
|
|
1554 tem = victim->cdr;
|
|
|
1555 free_cons (victim);
|
|
|
1556 }
|
|
|
1557 victim = XCONS (loser);
|
|
|
1558
|
|
|
1559 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1560 Vcondition_handlers = victim->cdr;
|
|
|
1561
|
|
|
1562 free_cons (victim);
|
|
|
1563 return (Qnil);
|
|
|
1564 }
|
|
|
1565
|
|
|
1566 static Lisp_Object
|
|
|
1567 condition_case_unwind (Lisp_Object loser)
|
|
|
1568 {
|
|
|
1569 struct Lisp_Cons *victim;
|
|
|
1570
|
|
|
1571 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1572 victim = XCONS (XCAR (loser));
|
|
|
1573 free_cons (victim);
|
|
|
1574
|
|
|
1575 victim = XCONS (loser);
|
|
|
1576 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1577 Vcondition_handlers = victim->cdr;
|
|
|
1578
|
|
|
1579 free_cons (victim);
|
|
|
1580 return (Qnil);
|
|
|
1581 }
|
|
|
1582
|
|
|
1583 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1584 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1585
|
|
|
1586 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1587 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1588 HANDLERS as something to be caught, the return value of this
|
|
|
1589 function is the return value from BFUN. If such an error does
|
|
|
1590 occur, HFUN is called, and its return value becomes the
|
|
|
1591 return value of condition_case_1(). The second argument passed
|
|
|
1592 to HFUN will always be HARG. The first argument depends on
|
|
|
1593 HANDLERS:
|
|
|
1594
|
|
|
1595 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1596 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1597 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1598 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1599 `debug-on-error' was set.
|
|
|
1600
|
|
|
1601 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1602 debugger is invoked if `debug-on-error' was set.
|
|
|
1603
|
|
|
1604 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1605 exactly as in `condition-case', and errors will be trapped
|
|
|
1606 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1607 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1608 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1609
|
|
|
1610 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1611 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1612 for why), establishes a catch whose tag is this new value of
|
|
|
1613 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1614 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1615 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1616 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1617 jump point we just established, and we in turn just call the
|
|
|
1618 HFUN and return its value.
|
|
|
1619
|
|
|
1620 For a real condition-case, HFUN will always be
|
|
|
1621 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1622 to condition-case. That function just binds VAR to the cons
|
|
|
1623 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1624 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1625 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1626 it had *before* condition_case_1() was called. This maintains
|
|
|
1627 consistency (so that the state of things at exit of
|
|
|
1628 condition_case_1() is the same as at entry), and implies
|
|
|
1629 that the handler can signal the same error again (possibly
|
|
|
1630 after processing of its own), without getting in an infinite
|
|
|
1631 loop. */
|
|
|
1632
|
|
|
1633 Lisp_Object
|
|
|
1634 condition_case_1 (Lisp_Object handlers,
|
|
|
1635 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1636 Lisp_Object barg,
|
|
|
1637 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1638 Lisp_Object harg)
|
|
|
1639 {
|
|
|
1640 int speccount = specpdl_depth_counter;
|
|
|
1641 struct catchtag c;
|
|
|
1642 struct gcpro gcpro1;
|
|
|
1643
|
|
|
1644 #if 0 /* FSFmacs */
|
|
|
1645 c.tag = Qnil;
|
|
|
1646 #else
|
|
|
1647 /* Do consing now so out-of-memory error happens up front */
|
|
|
1648 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1649 which is known specially by Fsignal.
|
|
|
1650 This is an abomination, but to fix it would require either
|
|
|
1651 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1652 or changing the byte-compiler output (no thanks). */
|
|
|
1653 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1654 Vcondition_handlers);
|
|
|
1655 #endif
|
|
|
1656 c.val = Qnil;
|
|
|
1657 c.backlist = backtrace_list;
|
|
|
1658 #if 0 /* FSFmacs */
|
|
|
1659 /* #### */
|
|
|
1660 c.handlerlist = handlerlist;
|
|
|
1661 #endif
|
|
|
1662 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1663 c.pdlcount = specpdl_depth_counter;
|
|
|
1664 #if 0 /* FSFmacs */
|
|
|
1665 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1666 #endif
|
|
|
1667 c.gcpro = gcprolist;
|
|
|
1668 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1669 c.next = catchlist;
|
|
|
1670
|
|
|
1671 if (SETJMP (c.jmp))
|
|
|
1672 {
|
|
|
1673 /* throw does ungcpro, etc */
|
|
|
1674 return ((*hfun) (c.val, harg));
|
|
|
1675 }
|
|
|
1676
|
|
|
1677 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1678
|
|
|
1679 catchlist = &c;
|
|
|
1680 #if 0 /* FSFmacs */
|
|
|
1681 h.handler = handlers;
|
|
|
1682 h.var = Qnil;
|
|
|
1683 h.next = handlerlist;
|
|
|
1684 h.tag = &c;
|
|
|
1685 handlerlist = &h;
|
|
|
1686 #else
|
|
|
1687 Vcondition_handlers = c.tag;
|
|
|
1688 #endif
|
|
|
1689 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1690
|
|
|
1691 c.val = ((*bfun) (barg));
|
|
|
1692
|
|
|
1693 /* The following is *not* true: (ben)
|
|
|
1694
|
|
|
1695 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1696 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1697 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1698 UNGCPRO;
|
|
|
1699 catchlist = c.next;
|
|
|
1700 Vcondition_handlers = XCDR (c.tag);
|
|
|
1701
|
|
|
1702 return (unbind_to (speccount, c.val));
|
|
|
1703 }
|
|
|
1704
|
|
|
1705 static Lisp_Object
|
|
|
1706 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1707 {
|
|
|
1708 /* This function can GC */
|
|
|
1709 #if 0 /* FSFmacs */
|
|
|
1710 if (!NILP (h.var))
|
|
|
1711 specbind (h.var, c.val);
|
|
|
1712 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1713
|
|
|
1714 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1715 longjumped to us unwound the stack to c.pdlcount before
|
|
|
1716 throwing. */
|
|
|
1717 unbind_to (c.pdlcount, Qnil);
|
|
|
1718 return val;
|
|
|
1719 #else
|
|
|
1720 int speccount;
|
|
|
1721
|
|
|
1722 if (NILP (var))
|
|
|
1723 return (Fprogn (Fcdr (val))); /* tailcall */
|
|
|
1724
|
|
|
1725 speccount = specpdl_depth_counter;
|
|
|
1726 specbind (var, Fcar (val));
|
|
|
1727 val = Fprogn (Fcdr (val));
|
|
|
1728 return unbind_to (speccount, val);
|
|
|
1729 #endif
|
|
|
1730 }
|
|
|
1731
|
|
|
1732 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1733 condition-case except that it takes three arguments rather
|
|
|
1734 than a single list of arguments. */
|
|
|
1735 Lisp_Object
|
|
|
1736 Fcondition_case_3 (Lisp_Object bodyform,
|
|
|
1737 Lisp_Object var, Lisp_Object handlers)
|
|
|
1738 {
|
|
|
1739 /* This function can GC */
|
|
|
1740 Lisp_Object val;
|
|
|
1741
|
|
|
1742 CHECK_SYMBOL (var);
|
|
|
1743
|
|
|
1744 for (val = handlers; ! NILP (val); val = Fcdr (val))
|
|
|
1745 {
|
|
|
1746 Lisp_Object tem;
|
|
|
1747 tem = Fcar (val);
|
|
|
1748 if ((!NILP (tem))
|
|
|
1749 && (!CONSP (tem)
|
|
|
1750 || (!SYMBOLP (XCAR (tem)) && !CONSP (XCAR (tem)))))
|
|
|
1751 signal_simple_error ("Invalid condition handler", tem);
|
|
|
1752 }
|
|
|
1753
|
|
|
1754 return condition_case_1 (handlers,
|
|
|
1755 Feval, bodyform,
|
|
|
1756 run_condition_case_handlers,
|
|
|
1757 var);
|
|
|
1758 }
|
|
|
1759
|
|
20
|
1760 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1761 Regain control when an error is signalled.
|
|
|
1762 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1763 executes BODYFORM and returns its value if no error happens.
|
|
|
1764 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1765 where the BODY is made of Lisp expressions.
|
|
|
1766
|
|
|
1767 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1768 error's condition names. If an error happens, the first applicable
|
|
|
1769 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1770 all errors, even those without the `error' condition name on them
|
|
|
1771 (e.g. `quit').
|
|
|
1772
|
|
|
1773 The car of a handler may be a list of condition names
|
|
|
1774 instead of a single condition name.
|
|
|
1775
|
|
|
1776 When a handler handles an error,
|
|
|
1777 control returns to the condition-case and the handler BODY... is executed
|
|
|
1778 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1779 VAR may be nil; then you do not get access to the signal information.
|
|
|
1780
|
|
|
1781 The value of the last BODY form is returned from the condition-case.
|
|
|
1782 See also the function `signal' for more info.
|
|
|
1783
|
|
|
1784 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1785 and the current catches, condition-cases, and bindings have all been
|
|
|
1786 popped back to the state they were in just before the call to
|
|
|
1787 `condition-case'. This means that resignalling the error from
|
|
|
1788 within the handler will not result in an infinite loop.
|
|
|
1789
|
|
|
1790 If you want to establish an error handler that is called with the
|
|
|
1791 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1792 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1793 */
|
|
70
|
1794 (args))
|
|
0
|
1795 {
|
|
|
1796 /* This function can GC */
|
|
|
1797 return Fcondition_case_3 (Fcar (Fcdr (args)),
|
|
|
1798 Fcar (args),
|
|
|
1799 Fcdr (Fcdr (args)));
|
|
|
1800 }
|
|
|
1801
|
|
20
|
1802 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1803 Regain control when an error is signalled, without popping the stack.
|
|
|
1804 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1805 This function is similar to `condition-case', but the handler is invoked
|
|
|
1806 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1807 that was current when `signal' was called, rather than when the handler
|
|
|
1808 was established.
|
|
|
1809
|
|
|
1810 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
1811 (SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
1812 `signal' is called (this differs from `condition-case', which allows
|
|
|
1813 you to specify which errors are trapped). If the handler function
|
|
|
1814 returns, `signal' continues as if the handler were never invoked.
|
|
|
1815 (It continues to look for handlers established earlier than this one,
|
|
|
1816 and invokes the standard error-handler if none is found.)
|
|
20
|
1817 */
|
|
70
|
1818 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1819 {
|
|
|
1820 /* This function can GC */
|
|
|
1821 int speccount = specpdl_depth_counter;
|
|
|
1822 Lisp_Object tem;
|
|
|
1823
|
|
|
1824 /* #### If there were a way to check that args[0] were a function
|
|
|
1825 which accepted one arg, that should be done here ... */
|
|
|
1826
|
|
|
1827 /* (handler-fun . handler-args) */
|
|
|
1828 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1829 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1830 Vcondition_handlers = tem;
|
|
|
1831
|
|
|
1832 /* Caller should have GC-protected args */
|
|
|
1833 tem = Ffuncall (nargs - 1, args + 1);
|
|
|
1834 return (unbind_to (speccount, tem));
|
|
|
1835 }
|
|
|
1836
|
|
|
1837 static int
|
|
|
1838 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1839 {
|
|
|
1840 if (EQ (type, Qt))
|
|
|
1841 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1842 * Use with caution! */
|
|
|
1843 return (1);
|
|
|
1844 else
|
|
|
1845 {
|
|
|
1846 if (SYMBOLP (type))
|
|
|
1847 {
|
|
|
1848 return (!NILP (Fmemq (type, conditions)));
|
|
|
1849 }
|
|
|
1850 else if (CONSP (type))
|
|
|
1851 {
|
|
|
1852 while (CONSP (type))
|
|
|
1853 {
|
|
|
1854 if (!NILP (Fmemq (Fcar (type), conditions)))
|
|
|
1855 return 1;
|
|
|
1856 type = XCDR (type);
|
|
|
1857 }
|
|
|
1858 return 0;
|
|
|
1859 }
|
|
|
1860 else
|
|
|
1861 return 0;
|
|
|
1862 }
|
|
|
1863 }
|
|
|
1864
|
|
|
1865 static Lisp_Object
|
|
|
1866 return_from_signal (Lisp_Object value)
|
|
|
1867 {
|
|
|
1868 #if 1 /* RMS Claims: */
|
|
|
1869 /* Most callers are not prepared to handle gc if this
|
|
|
1870 returns. So, since this feature is not very useful,
|
|
|
1871 take it out. */
|
|
|
1872 /* Have called debugger; return value to signaller */
|
|
|
1873 return (value);
|
|
|
1874 #else /* But the reality is that that stinks, because: */
|
|
|
1875 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1876 to be continuable!! */
|
|
|
1877 error ("Returning a value from an error is no longer supported");
|
|
|
1878 #endif
|
|
|
1879 }
|
|
|
1880
|
|
|
1881 extern int in_display;
|
|
|
1882 extern int gc_in_progress;
|
|
|
1883
|
|
|
1884
|
|
|
1885 /****************** the workhorse error-signaling function ******************/
|
|
|
1886
|
|
|
1887 /* #### This function has not been synched with FSF. It diverges
|
|
|
1888 significantly. */
|
|
|
1889
|
|
|
1890 static Lisp_Object
|
|
|
1891 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1892 {
|
|
|
1893 /* This function can GC */
|
|
|
1894 struct gcpro gcpro1, gcpro2;
|
|
|
1895 Lisp_Object conditions;
|
|
|
1896 Lisp_Object handlers;
|
|
|
1897 /* signal_call_debugger() could get called more than once
|
|
|
1898 (once when a call-with-condition-handler is about to
|
|
|
1899 be dealt with, and another when a condition-case handler
|
|
|
1900 is about to be invoked). So make sure the debugger and/or
|
|
|
1901 stack trace aren't done more than once. */
|
|
|
1902 int stack_trace_displayed = 0;
|
|
|
1903 int debugger_entered = 0;
|
|
|
1904 GCPRO2 (conditions, handlers);
|
|
|
1905
|
|
|
1906 if (!initialized)
|
|
|
1907 {
|
|
|
1908 /* who knows how much has been initialized? Safest bet is
|
|
|
1909 just to bomb out immediately. */
|
|
|
1910 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1911 abort ();
|
|
|
1912 }
|
|
|
1913
|
|
|
1914 if (gc_in_progress || in_display)
|
|
|
1915 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1916 There is no sensible way to handle errors there. */
|
|
|
1917 abort ();
|
|
|
1918
|
|
|
1919 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1920
|
|
|
1921 for (handlers = Vcondition_handlers;
|
|
|
1922 CONSP (handlers);
|
|
|
1923 handlers = XCDR (handlers))
|
|
|
1924 {
|
|
|
1925 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1926 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1927 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1928
|
|
|
1929 if (!UNBOUNDP (handler_fun))
|
|
|
1930 {
|
|
|
1931 /* call-with-condition-handler */
|
|
|
1932 Lisp_Object tem;
|
|
|
1933 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1934 struct gcpro ngcpro1;
|
|
|
1935 NGCPRO1 (all_handlers);
|
|
|
1936 Vcondition_handlers = outer_handlers;
|
|
|
1937
|
|
|
1938 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1939 outer_handlers, 1,
|
|
|
1940 &stack_trace_displayed,
|
|
|
1941 &debugger_entered);
|
|
|
1942 if (!UNBOUNDP (tem))
|
|
|
1943 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1944
|
|
|
1945 tem = Fcons (sig, data);
|
|
|
1946 if (NILP (handler_data))
|
|
|
1947 tem = call1 (handler_fun, tem);
|
|
|
1948 else
|
|
|
1949 {
|
|
|
1950 /* (This code won't be used (for now?).) */
|
|
|
1951 struct gcpro nngcpro1;
|
|
|
1952 Lisp_Object args[3];
|
|
|
1953 NNGCPRO1 (args[0]);
|
|
|
1954 nngcpro1.nvars = 3;
|
|
|
1955 args[0] = handler_fun;
|
|
|
1956 args[1] = tem;
|
|
|
1957 args[2] = handler_data;
|
|
|
1958 nngcpro1.var = args;
|
|
|
1959 tem = Fapply (3, args);
|
|
|
1960 NNUNGCPRO;
|
|
|
1961 }
|
|
|
1962 NUNGCPRO;
|
|
|
1963 #if 0
|
|
|
1964 if (!EQ (tem, Qsignal))
|
|
|
1965 return (return_from_signal (tem));
|
|
|
1966 #endif
|
|
|
1967 /* If handler didn't throw, try another handler */
|
|
|
1968 Vcondition_handlers = all_handlers;
|
|
|
1969 }
|
|
|
1970
|
|
|
1971 /* It's a condition-case handler */
|
|
|
1972
|
|
|
1973 /* t is used by handlers for all conditions, set up by C code.
|
|
|
1974 * debugger is not called even if debug_on_error */
|
|
|
1975 else if (EQ (handler_data, Qt))
|
|
|
1976 {
|
|
|
1977 UNGCPRO;
|
|
|
1978 return (Fthrow (handlers, Fcons (sig, data)));
|
|
|
1979 }
|
|
|
1980 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1981 addition it invokes the debugger if debug_on_error.
|
|
|
1982 This is normally used for the outer command-loop error
|
|
|
1983 handler. */
|
|
|
1984 else if (EQ (handler_data, Qerror))
|
|
|
1985 {
|
|
|
1986 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1987 outer_handlers, 0,
|
|
|
1988 &stack_trace_displayed,
|
|
|
1989 &debugger_entered);
|
|
|
1990
|
|
|
1991 UNGCPRO;
|
|
|
1992 if (!UNBOUNDP (tem))
|
|
|
1993 return (return_from_signal (tem));
|
|
|
1994
|
|
|
1995 tem = Fcons (sig, data);
|
|
|
1996 return (Fthrow (handlers, tem));
|
|
|
1997 }
|
|
|
1998 else
|
|
|
1999 {
|
|
|
2000 /* handler established by real (Lisp) condition-case */
|
|
|
2001 Lisp_Object h;
|
|
|
2002
|
|
|
2003 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
2004 {
|
|
|
2005 Lisp_Object clause = Fcar (h);
|
|
|
2006 Lisp_Object tem = Fcar (clause);
|
|
|
2007
|
|
|
2008 if (condition_type_p (tem, conditions))
|
|
|
2009 {
|
|
|
2010 tem = signal_call_debugger (conditions, sig, data,
|
|
|
2011 outer_handlers, 1,
|
|
|
2012 &stack_trace_displayed,
|
|
|
2013 &debugger_entered);
|
|
|
2014 UNGCPRO;
|
|
|
2015 if (!UNBOUNDP (tem))
|
|
|
2016 return (return_from_signal (tem));
|
|
|
2017
|
|
|
2018 /* Doesn't return */
|
|
|
2019 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
|
2020 return (Fthrow (handlers, tem));
|
|
|
2021 }
|
|
|
2022 }
|
|
|
2023 }
|
|
|
2024 }
|
|
|
2025
|
|
|
2026 /* If no handler is present now, try to run the debugger,
|
|
|
2027 and if that fails, throw to top level.
|
|
|
2028
|
|
|
2029 #### The only time that no handler is present is during
|
|
|
2030 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
2031 there is no 'top-level catch. (That's why the
|
|
|
2032 "bomb-out" hack was added.)
|
|
|
2033
|
|
|
2034 #### Fix this horrifitude!
|
|
|
2035 */
|
|
|
2036 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
2037 &stack_trace_displayed,
|
|
|
2038 &debugger_entered);
|
|
|
2039 UNGCPRO;
|
|
|
2040 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2041 return Qnil;
|
|
|
2042 }
|
|
|
2043
|
|
|
2044
|
|
|
2045 /****************** Error functions class 1 ******************/
|
|
|
2046
|
|
|
2047 /* Class 1: General functions that signal an error.
|
|
|
2048 These functions take an error type and a list of associated error
|
|
|
2049 data. */
|
|
|
2050
|
|
|
2051 /* The simplest external error function: it would be called
|
|
|
2052 signal_continuable_error() in the terminology below, but it's
|
|
|
2053 Lisp-callable. */
|
|
|
2054
|
|
20
|
2055 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2056 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2057 An error symbol is a symbol defined using `define-error'.
|
|
|
2058 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2059 If the signal is handled, DATA is made available to the handler.
|
|
|
2060 See also the function `signal-error', and the functions to handle errors:
|
|
|
2061 `condition-case' and `call-with-condition-handler'.
|
|
|
2062
|
|
|
2063 Note that this function can return, if the debugger is invoked and the
|
|
|
2064 user invokes the "return from signal" option.
|
|
20
|
2065 */
|
|
|
2066 (error_symbol, data))
|
|
0
|
2067 {
|
|
|
2068 /* Fsignal() is one of these functions that's called all the time
|
|
|
2069 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2070 protect the objects because all sorts of weird stuff could
|
|
|
2071 happen. */
|
|
|
2072
|
|
|
2073 struct gcpro gcpro1;
|
|
|
2074
|
|
|
2075 GCPRO1 (data);
|
|
|
2076 if (!NILP (Vcurrent_error_state))
|
|
|
2077 {
|
|
|
2078 if (!NILP (Vcurrent_warning_class))
|
|
|
2079 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2080 Fcons (error_symbol, data));
|
|
|
2081 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2082 abort (); /* Better not get here! */
|
|
|
2083 }
|
|
|
2084 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2085 }
|
|
|
2086
|
|
|
2087 /* Signal a non-continuable error. */
|
|
|
2088
|
|
|
2089 DOESNT_RETURN
|
|
|
2090 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2091 {
|
|
|
2092 for (;;)
|
|
|
2093 Fsignal (sig, data);
|
|
|
2094 }
|
|
|
2095
|
|
|
2096 static Lisp_Object
|
|
|
2097 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2098 {
|
|
|
2099 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
74
|
2100 return (primitive_funcall ((lisp_fn_t) get_opaque_ptr (kludgy_args[0]),
|
|
|
2101 XINT (kludgy_args[1]), kludgy_args + 2));
|
|
0
|
2102 }
|
|
|
2103
|
|
|
2104 static Lisp_Object
|
|
|
2105 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2106 {
|
|
|
2107 Vcurrent_warning_class = warning_class;
|
|
|
2108 return Qnil;
|
|
|
2109 }
|
|
|
2110
|
|
|
2111 static Lisp_Object
|
|
|
2112 restore_current_error_state (Lisp_Object error_state)
|
|
|
2113 {
|
|
|
2114 Vcurrent_error_state = error_state;
|
|
|
2115 return Qnil;
|
|
|
2116 }
|
|
|
2117
|
|
|
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
|
|
|
2125 Currently there's lots of stuff that passes an Error_behavior
|
|
|
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
|
|
74
|
2134 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval,
|
|
0
|
2135 Lisp_Object class, Error_behavior errb,
|
|
|
2136 int nargs, ...)
|
|
|
2137 {
|
|
|
2138 va_list vargs;
|
|
|
2139 int speccount;
|
|
|
2140 Lisp_Object kludgy_args[22];
|
|
|
2141 Lisp_Object *args = kludgy_args + 2;
|
|
|
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 return primitive_funcall (fun, nargs, args);
|
|
|
2178
|
|
|
2179 speccount = specpdl_depth ();
|
|
|
2180 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2181 {
|
|
|
2182 /* If we're currently calling for no warnings, then make it so.
|
|
|
2183 If we're currently calling for warnings and we weren't
|
|
|
2184 previously, then set our warning class; otherwise, leave
|
|
|
2185 the existing one alone. */
|
|
|
2186 record_unwind_protect (restore_current_warning_class,
|
|
|
2187 Vcurrent_warning_class);
|
|
|
2188 Vcurrent_warning_class = class;
|
|
|
2189 }
|
|
|
2190 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2191 {
|
|
|
2192 record_unwind_protect (restore_current_error_state,
|
|
|
2193 Vcurrent_error_state);
|
|
|
2194 Vcurrent_error_state = no_error;
|
|
|
2195 }
|
|
|
2196
|
|
|
2197 {
|
|
|
2198 int threw;
|
|
|
2199 Lisp_Object the_retval;
|
|
|
2200 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2201 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2202 struct gcpro gcpro1, gcpro2;
|
|
|
2203
|
|
|
2204 GCPRO2 (opaque1, opaque2);
|
|
|
2205 kludgy_args[0] = opaque2;
|
|
|
2206 kludgy_args[1] = make_int (nargs);
|
|
|
2207 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2208 call_with_suspended_errors_1,
|
|
|
2209 opaque1, &threw);
|
|
|
2210 free_opaque_ptr (opaque1);
|
|
|
2211 free_opaque_ptr (opaque2);
|
|
|
2212 UNGCPRO;
|
|
|
2213 /* Use the returned value except in non-local exit, when
|
|
|
2214 RETVAL applies. */
|
|
|
2215 if (!threw)
|
|
|
2216 retval = the_retval;
|
|
|
2217 return unbind_to (speccount, retval);
|
|
|
2218 }
|
|
|
2219 }
|
|
|
2220
|
|
|
2221 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2222 according to ERRB. CLASS is the class of warning and should
|
|
|
2223 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2224 Qresource, etc.). */
|
|
|
2225
|
|
|
2226 void
|
|
|
2227 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2228 Error_behavior errb)
|
|
|
2229 {
|
|
|
2230 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2231 return;
|
|
|
2232 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2233 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2234 else
|
|
|
2235 for (;;)
|
|
|
2236 Fsignal (sig, data);
|
|
|
2237 }
|
|
|
2238
|
|
|
2239 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2240 according to ERRB. */
|
|
|
2241
|
|
|
2242 Lisp_Object
|
|
|
2243 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2244 Lisp_Object class, Error_behavior errb)
|
|
|
2245 {
|
|
|
2246 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2247 return Qnil;
|
|
|
2248 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2249 {
|
|
|
2250 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2251 return Qnil;
|
|
|
2252 }
|
|
|
2253 else
|
|
|
2254 return Fsignal (sig, data);
|
|
|
2255 }
|
|
|
2256
|
|
|
2257
|
|
|
2258 /****************** Error functions class 2 ******************/
|
|
|
2259
|
|
|
2260 /* Class 2: Printf-like functions that signal an error.
|
|
|
2261 These functions signal an error of type Qerror, whose data
|
|
|
2262 is a single string, created using the arguments. */
|
|
|
2263
|
|
|
2264 /* dump an error message; called like printf */
|
|
|
2265
|
|
|
2266 DOESNT_RETURN
|
|
|
2267 error (CONST char *fmt, ...)
|
|
|
2268 {
|
|
|
2269 Lisp_Object obj;
|
|
|
2270 va_list args;
|
|
|
2271
|
|
|
2272 va_start (args, fmt);
|
|
|
2273 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2274 args);
|
|
|
2275 va_end (args);
|
|
|
2276
|
|
|
2277 /* Fsignal GC-protects its args */
|
|
|
2278 signal_error (Qerror, list1 (obj));
|
|
|
2279 }
|
|
|
2280
|
|
|
2281 void
|
|
|
2282 maybe_error (Lisp_Object class, Error_behavior errb, CONST char *fmt, ...)
|
|
|
2283 {
|
|
|
2284 Lisp_Object obj;
|
|
|
2285 va_list args;
|
|
|
2286
|
|
|
2287 /* Optimization: */
|
|
|
2288 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2289 return;
|
|
|
2290
|
|
|
2291 va_start (args, fmt);
|
|
|
2292 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2293 args);
|
|
|
2294 va_end (args);
|
|
|
2295
|
|
|
2296 /* Fsignal GC-protects its args */
|
|
|
2297 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2298 }
|
|
|
2299
|
|
|
2300 Lisp_Object
|
|
|
2301 continuable_error (CONST char *fmt, ...)
|
|
|
2302 {
|
|
|
2303 Lisp_Object obj;
|
|
|
2304 va_list args;
|
|
|
2305
|
|
|
2306 va_start (args, fmt);
|
|
|
2307 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2308 args);
|
|
|
2309 va_end (args);
|
|
|
2310
|
|
|
2311 /* Fsignal GC-protects its args */
|
|
|
2312 return Fsignal (Qerror, list1 (obj));
|
|
|
2313 }
|
|
|
2314
|
|
|
2315 Lisp_Object
|
|
|
2316 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
|
2317 CONST char *fmt, ...)
|
|
|
2318 {
|
|
|
2319 Lisp_Object obj;
|
|
|
2320 va_list args;
|
|
|
2321
|
|
|
2322 /* Optimization: */
|
|
|
2323 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2324 return Qnil;
|
|
|
2325
|
|
|
2326 va_start (args, fmt);
|
|
|
2327 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2328 args);
|
|
|
2329 va_end (args);
|
|
|
2330
|
|
|
2331 /* Fsignal GC-protects its args */
|
|
|
2332 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2333 }
|
|
|
2334
|
|
|
2335
|
|
|
2336 /****************** Error functions class 3 ******************/
|
|
|
2337
|
|
|
2338 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2339 These functions signal an error of type Qerror, whose data
|
|
|
2340 is two objects, a string and a related Lisp object (usually the object
|
|
|
2341 where the error is occurring). */
|
|
|
2342
|
|
|
2343 DOESNT_RETURN
|
|
|
2344 signal_simple_error (CONST char *reason, Lisp_Object frob)
|
|
|
2345 {
|
|
|
2346 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2347 }
|
|
|
2348
|
|
|
2349 void
|
|
|
2350 maybe_signal_simple_error (CONST char *reason, Lisp_Object frob,
|
|
|
2351 Lisp_Object class, Error_behavior errb)
|
|
|
2352 {
|
|
|
2353 /* Optimization: */
|
|
|
2354 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2355 return;
|
|
|
2356 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2357 class, errb);
|
|
|
2358 }
|
|
|
2359
|
|
|
2360 Lisp_Object
|
|
|
2361 signal_simple_continuable_error (CONST char *reason, Lisp_Object frob)
|
|
|
2362 {
|
|
|
2363 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2364 }
|
|
|
2365
|
|
|
2366 Lisp_Object
|
|
|
2367 maybe_signal_simple_continuable_error (CONST char *reason, Lisp_Object frob,
|
|
|
2368 Lisp_Object class, Error_behavior errb)
|
|
|
2369 {
|
|
|
2370 /* Optimization: */
|
|
|
2371 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2372 return Qnil;
|
|
|
2373 return maybe_signal_continuable_error
|
|
|
2374 (Qerror, list2 (build_translated_string (reason),
|
|
|
2375 frob), class, errb);
|
|
|
2376 }
|
|
|
2377
|
|
|
2378
|
|
|
2379 /****************** Error functions class 4 ******************/
|
|
|
2380
|
|
|
2381 /* Class 4: Printf-like functions that signal an error.
|
|
|
2382 These functions signal an error of type Qerror, whose data
|
|
|
2383 is a two objects, a string (created using the arguments) and a
|
|
|
2384 Lisp object.
|
|
|
2385 */
|
|
|
2386
|
|
|
2387 DOESNT_RETURN
|
|
|
2388 error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2389 {
|
|
|
2390 Lisp_Object obj;
|
|
|
2391 va_list args;
|
|
|
2392
|
|
|
2393 va_start (args, fmt);
|
|
|
2394 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2395 args);
|
|
|
2396 va_end (args);
|
|
|
2397
|
|
|
2398 /* Fsignal GC-protects its args */
|
|
|
2399 signal_error (Qerror, list2 (obj, frob));
|
|
|
2400 }
|
|
|
2401
|
|
|
2402 void
|
|
|
2403 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2404 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2405 {
|
|
|
2406 Lisp_Object obj;
|
|
|
2407 va_list args;
|
|
|
2408
|
|
|
2409 /* Optimization: */
|
|
|
2410 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2411 return;
|
|
|
2412
|
|
|
2413 va_start (args, fmt);
|
|
|
2414 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2415 args);
|
|
|
2416 va_end (args);
|
|
|
2417
|
|
|
2418 /* Fsignal GC-protects its args */
|
|
|
2419 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2420 }
|
|
|
2421
|
|
|
2422 Lisp_Object
|
|
|
2423 continuable_error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2424 {
|
|
|
2425 Lisp_Object obj;
|
|
|
2426 va_list args;
|
|
|
2427
|
|
|
2428 va_start (args, fmt);
|
|
|
2429 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2430 args);
|
|
|
2431 va_end (args);
|
|
|
2432
|
|
|
2433 /* Fsignal GC-protects its args */
|
|
|
2434 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2435 }
|
|
|
2436
|
|
|
2437 Lisp_Object
|
|
|
2438 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2439 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2440 {
|
|
|
2441 Lisp_Object obj;
|
|
|
2442 va_list args;
|
|
|
2443
|
|
|
2444 /* Optimization: */
|
|
|
2445 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2446 return Qnil;
|
|
|
2447
|
|
|
2448 va_start (args, fmt);
|
|
|
2449 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2450 args);
|
|
|
2451 va_end (args);
|
|
|
2452
|
|
|
2453 /* Fsignal GC-protects its args */
|
|
|
2454 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2455 class, errb);
|
|
|
2456 }
|
|
|
2457
|
|
|
2458
|
|
|
2459 /****************** Error functions class 5 ******************/
|
|
|
2460
|
|
|
2461 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2462 These functions signal an error of type Qerror, whose data
|
|
|
2463 is three objects, a string and two related Lisp objects. */
|
|
|
2464
|
|
|
2465 DOESNT_RETURN
|
|
|
2466 signal_simple_error_2 (CONST char *reason,
|
|
|
2467 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2468 {
|
|
|
2469 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2470 frob1));
|
|
|
2471 }
|
|
|
2472
|
|
|
2473 void
|
|
|
2474 maybe_signal_simple_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2475 Lisp_Object frob1, Lisp_Object class,
|
|
|
2476 Error_behavior errb)
|
|
|
2477 {
|
|
|
2478 /* Optimization: */
|
|
|
2479 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2480 return;
|
|
|
2481 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2482 frob1), class, errb);
|
|
|
2483 }
|
|
|
2484
|
|
|
2485
|
|
|
2486 Lisp_Object
|
|
|
2487 signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2488 Lisp_Object frob1)
|
|
|
2489 {
|
|
|
2490 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2491 frob1));
|
|
|
2492 }
|
|
|
2493
|
|
|
2494 Lisp_Object
|
|
|
2495 maybe_signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2496 Lisp_Object frob1, Lisp_Object class,
|
|
|
2497 Error_behavior errb)
|
|
|
2498 {
|
|
|
2499 /* Optimization: */
|
|
|
2500 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2501 return Qnil;
|
|
|
2502 return maybe_signal_continuable_error
|
|
|
2503 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2504 frob1),
|
|
|
2505 class, errb);
|
|
|
2506 }
|
|
|
2507
|
|
|
2508
|
|
|
2509 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2510 void
|
|
|
2511 signal_quit (void)
|
|
|
2512 {
|
|
|
2513 /* This function can GC */
|
|
|
2514 if (EQ (Vquit_flag, Qcritical))
|
|
|
2515 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2516 Vquit_flag = Qnil;
|
|
|
2517 /* note that this is continuable. */
|
|
|
2518 Fsignal (Qquit, Qnil);
|
|
|
2519 }
|
|
|
2520
|
|
|
2521
|
|
149
|
2522 DEFUN ("strerror", Fstrerror, 1, 1, 0, /*
|
|
|
2523 Return the error string associated with integer ERRNUM.
|
|
|
2524 This function is an interface to strerror(3).
|
|
|
2525 The returned string may or may not be translated.
|
|
|
2526 */
|
|
|
2527 (errnum))
|
|
|
2528 {
|
|
|
2529 CHECK_INT (errnum);
|
|
|
2530 return build_ext_string (strerror (XINT (errnum)), FORMAT_NATIVE);
|
|
|
2531 }
|
|
|
2532
|
|
|
2533
|
|
0
|
2534 /**********************************************************************/
|
|
|
2535 /* User commands */
|
|
|
2536 /**********************************************************************/
|
|
|
2537
|
|
20
|
2538 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
0
|
2539 T if FUNCTION makes provisions for interactive calling.
|
|
|
2540 This means it contains a description for how to read arguments to give it.
|
|
|
2541 The value is nil for an invalid function or a symbol with no function
|
|
|
2542 definition.
|
|
|
2543
|
|
|
2544 Interactively callable functions include
|
|
|
2545
|
|
|
2546 -- strings and vectors (treated as keyboard macros)
|
|
|
2547 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2548 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2549 (i.e. the interactive flag)
|
|
|
2550 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2551 value
|
|
|
2552 -- subrs (built-in functions) that are interactively callable
|
|
|
2553
|
|
|
2554 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2555 */
|
|
|
2556 (function))
|
|
0
|
2557 {
|
|
|
2558 REGISTER Lisp_Object fun;
|
|
|
2559 REGISTER Lisp_Object funcar;
|
|
|
2560
|
|
|
2561 fun = function;
|
|
|
2562
|
|
|
2563 fun = indirect_function (fun, 0);
|
|
|
2564 if (UNBOUNDP (fun))
|
|
|
2565 return Qnil;
|
|
|
2566
|
|
|
2567 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2568 interactive spec. */
|
|
|
2569 if (SUBRP (fun))
|
|
149
|
2570 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2571
|
|
|
2572 if (COMPILED_FUNCTIONP (fun))
|
|
|
2573 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
0
|
2574
|
|
|
2575 /* Strings and vectors are keyboard macros. */
|
|
|
2576 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2577 return Qt;
|
|
|
2578
|
|
|
2579 /* Lists may represent commands. */
|
|
|
2580 if (!CONSP (fun))
|
|
|
2581 return Qnil;
|
|
|
2582 funcar = Fcar (fun);
|
|
|
2583 if (!SYMBOLP (funcar))
|
|
|
2584 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
2585 if (EQ (funcar, Qlambda))
|
|
|
2586 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2587 if (EQ (funcar, Qautoload))
|
|
|
2588 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2589 else
|
|
|
2590 return Qnil;
|
|
|
2591 }
|
|
|
2592
|
|
20
|
2593 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2594 Execute CMD as an editor command.
|
|
|
2595 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2596 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2597 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2598 when reading the arguments.
|
|
20
|
2599 */
|
|
|
2600 (cmd, record, keys))
|
|
0
|
2601 {
|
|
|
2602 /* This function can GC */
|
|
|
2603 Lisp_Object prefixarg;
|
|
|
2604 Lisp_Object final = cmd;
|
|
|
2605 struct backtrace backtrace;
|
|
|
2606 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2607
|
|
|
2608 prefixarg = con->prefix_arg;
|
|
|
2609 con->prefix_arg = Qnil;
|
|
|
2610 Vcurrent_prefix_arg = prefixarg;
|
|
|
2611 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2612
|
|
|
2613 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2614 return run_hook (Vdisabled_command_hook);
|
|
|
2615
|
|
|
2616 for (;;)
|
|
|
2617 {
|
|
|
2618 final = indirect_function (cmd, 1);
|
|
|
2619 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2620 do_autoload (final, cmd);
|
|
|
2621 else
|
|
|
2622 break;
|
|
|
2623 }
|
|
|
2624
|
|
|
2625 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2626 {
|
|
|
2627 #ifdef EMACS_BTL
|
|
|
2628 backtrace.id_number = 0;
|
|
|
2629 #endif
|
|
|
2630 backtrace.function = &Qcall_interactively;
|
|
|
2631 backtrace.args = &cmd;
|
|
|
2632 backtrace.nargs = 1;
|
|
|
2633 backtrace.evalargs = 0;
|
|
|
2634 backtrace.pdlcount = specpdl_depth ();
|
|
|
2635 backtrace.debug_on_exit = 0;
|
|
116
|
2636 PUSH_BACKTRACE (backtrace);
|
|
0
|
2637
|
|
|
2638 final = Fcall_interactively (cmd, record, keys);
|
|
|
2639
|
|
116
|
2640 POP_BACKTRACE (backtrace);
|
|
0
|
2641 return (final);
|
|
|
2642 }
|
|
|
2643 else if (STRINGP (final) || VECTORP (final))
|
|
|
2644 {
|
|
|
2645 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2646 }
|
|
|
2647 else
|
|
|
2648 {
|
|
|
2649 Fsignal (Qwrong_type_argument,
|
|
|
2650 Fcons (Qcommandp,
|
|
|
2651 ((EQ (cmd, final))
|
|
|
2652 ? list1 (cmd)
|
|
|
2653 : list2 (cmd, final))));
|
|
|
2654 return Qnil;
|
|
|
2655 }
|
|
|
2656 }
|
|
|
2657
|
|
20
|
2658 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2659 Return t if function in which this appears was called interactively.
|
|
|
2660 This means that the function was called with call-interactively (which
|
|
|
2661 includes being called as the binding of a key)
|
|
|
2662 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2663 */
|
|
|
2664 ())
|
|
0
|
2665 {
|
|
|
2666 REGISTER struct backtrace *btp;
|
|
|
2667 REGISTER Lisp_Object fun;
|
|
|
2668
|
|
|
2669 if (!INTERACTIVE)
|
|
|
2670 return Qnil;
|
|
|
2671
|
|
|
2672 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2673 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2674 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2675 compiled function. */
|
|
|
2676 btp = backtrace_list;
|
|
|
2677
|
|
|
2678 #if 0 /* FSFmacs */
|
|
|
2679
|
|
|
2680 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2681 out which one is more correct. */
|
|
|
2682 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2683 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2684 fun = Findirect_function (*btp->function);
|
|
|
2685 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2686 btp = btp->next;
|
|
|
2687
|
|
|
2688 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2689 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2690 definition, this function isn't really being called
|
|
|
2691 interactively, but because that's the way Emacs 18 always builds
|
|
|
2692 byte-compiled functions, we'll accept it for now. */
|
|
|
2693 if (EQ (*btp->function, Qbyte_code))
|
|
|
2694 btp = btp->next;
|
|
|
2695
|
|
|
2696 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2697 looking at several frames for special forms. Skip past them. */
|
|
|
2698 while (btp &&
|
|
|
2699 btp->nargs == UNEVALLED)
|
|
|
2700 btp = btp->next;
|
|
|
2701
|
|
|
2702 #else
|
|
|
2703
|
|
|
2704 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2705 btp = btp->next;
|
|
|
2706 for (;
|
|
|
2707 btp && (btp->nargs == UNEVALLED
|
|
|
2708 || EQ (*btp->function, Qbyte_code));
|
|
|
2709 btp = btp->next)
|
|
|
2710 {}
|
|
|
2711 /* btp now points at the frame of the innermost function
|
|
|
2712 that DOES eval its args.
|
|
|
2713 If it is a built-in function (such as load or eval-region)
|
|
|
2714 return nil. */
|
|
|
2715 /* Beats me why this is necessary, but it is */
|
|
|
2716 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2717 return Qt;
|
|
|
2718
|
|
|
2719 #endif
|
|
|
2720
|
|
|
2721 fun = Findirect_function (*btp->function);
|
|
|
2722 if (SUBRP (fun))
|
|
|
2723 return Qnil;
|
|
|
2724 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2725 Return t if that function was called interactively. */
|
|
|
2726 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2727 return Qt;
|
|
|
2728 return Qnil;
|
|
|
2729 }
|
|
|
2730
|
|
|
2731
|
|
|
2732 /**********************************************************************/
|
|
|
2733 /* Autoloading */
|
|
|
2734 /**********************************************************************/
|
|
|
2735
|
|
20
|
2736 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2737 Define FUNCTION to autoload from FILE.
|
|
|
2738 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2739 Third arg DOCSTRING is documentation for the function.
|
|
|
2740 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2741 Fifth arg TYPE indicates the type of the object:
|
|
|
2742 nil or omitted says FUNCTION is a function,
|
|
|
2743 `keymap' says FUNCTION is really a keymap, and
|
|
|
2744 `macro' or t says FUNCTION is really a macro.
|
|
|
2745 Third through fifth args give info about the real definition.
|
|
|
2746 They default to nil.
|
|
|
2747 If FUNCTION is already defined other than as an autoload,
|
|
|
2748 this does nothing and returns nil.
|
|
20
|
2749 */
|
|
|
2750 (function, file, docstring, interactive, type))
|
|
0
|
2751 {
|
|
|
2752 /* This function can GC */
|
|
|
2753 CHECK_SYMBOL (function);
|
|
|
2754 CHECK_STRING (file);
|
|
|
2755
|
|
|
2756 /* If function is defined and not as an autoload, don't override */
|
|
|
2757 if (!UNBOUNDP (XSYMBOL (function)->function)
|
|
|
2758 && !(CONSP (XSYMBOL (function)->function)
|
|
|
2759 && EQ (XCAR (XSYMBOL (function)->function), Qautoload)))
|
|
|
2760 return Qnil;
|
|
|
2761
|
|
|
2762 if (purify_flag)
|
|
|
2763 {
|
|
|
2764 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2765 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2766 }
|
|
|
2767
|
|
|
2768 return Ffset (function,
|
|
|
2769 Fpurecopy (Fcons (Qautoload, list4 (file,
|
|
|
2770 docstring,
|
|
|
2771 interactive,
|
|
|
2772 type))));
|
|
|
2773 }
|
|
|
2774
|
|
|
2775 Lisp_Object
|
|
|
2776 un_autoload (Lisp_Object oldqueue)
|
|
|
2777 {
|
|
|
2778 /* This function can GC */
|
|
|
2779 REGISTER Lisp_Object queue, first, second;
|
|
|
2780
|
|
|
2781 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2782 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2783 queue = Vautoload_queue;
|
|
|
2784 Vautoload_queue = oldqueue;
|
|
|
2785 while (CONSP (queue))
|
|
|
2786 {
|
|
|
2787 first = Fcar (queue);
|
|
|
2788 second = Fcdr (first);
|
|
|
2789 first = Fcar (first);
|
|
|
2790 if (NILP (second))
|
|
|
2791 Vfeatures = first;
|
|
|
2792 else
|
|
|
2793 Ffset (first, second);
|
|
|
2794 queue = Fcdr (queue);
|
|
|
2795 }
|
|
|
2796 return Qnil;
|
|
|
2797 }
|
|
|
2798
|
|
|
2799 void
|
|
|
2800 do_autoload (Lisp_Object fundef,
|
|
|
2801 Lisp_Object funname)
|
|
|
2802 {
|
|
|
2803 /* This function can GC */
|
|
|
2804 int speccount = specpdl_depth_counter;
|
|
|
2805 Lisp_Object fun = funname;
|
|
|
2806 struct gcpro gcpro1, gcpro2;
|
|
|
2807
|
|
|
2808 CHECK_SYMBOL (funname);
|
|
|
2809 GCPRO2 (fun, funname);
|
|
|
2810
|
|
|
2811 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2812 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2813 Vautoload_queue = Qt;
|
|
|
2814 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil,
|
|
|
2815 Qnil);
|
|
|
2816
|
|
|
2817 {
|
|
|
2818 Lisp_Object queue = Vautoload_queue;
|
|
|
2819
|
|
|
2820 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
2821 queue = Vautoload_queue;
|
|
|
2822 while (CONSP (queue))
|
|
|
2823 {
|
|
|
2824 Lisp_Object first = Fcar (queue);
|
|
|
2825 Lisp_Object second = Fcdr (first);
|
|
|
2826
|
|
|
2827 first = Fcar (first);
|
|
|
2828
|
|
|
2829 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2830 may be an atom if the autoload entry was generated by a defalias
|
|
|
2831 or fset. */
|
|
|
2832 if (CONSP (second))
|
|
|
2833 Fput (first, Qautoload, (Fcdr (second)));
|
|
|
2834
|
|
|
2835 queue = Fcdr (queue);
|
|
|
2836 }
|
|
|
2837 }
|
|
|
2838
|
|
|
2839 /* Once loading finishes, don't undo it. */
|
|
|
2840 Vautoload_queue = Qt;
|
|
|
2841 unbind_to (speccount, Qnil);
|
|
|
2842
|
|
|
2843 fun = indirect_function (fun, 0);
|
|
|
2844
|
|
|
2845 #if 0 /* FSFmacs */
|
|
|
2846 if (!NILP (Fequal (fun, fundef)))
|
|
|
2847 #else
|
|
|
2848 if (UNBOUNDP (fun)
|
|
|
2849 || (CONSP (fun)
|
|
|
2850 && EQ (XCAR (fun), Qautoload)))
|
|
|
2851 #endif
|
|
|
2852 error ("Autoloading failed to define function %s",
|
|
|
2853 string_data (XSYMBOL (funname)->name));
|
|
|
2854 UNGCPRO;
|
|
|
2855 }
|
|
|
2856
|
|
|
2857
|
|
|
2858 /**********************************************************************/
|
|
|
2859 /* eval, funcall, apply */
|
|
|
2860 /**********************************************************************/
|
|
|
2861
|
|
|
2862 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
|
2863 int nargs, Lisp_Object args[]);
|
|
|
2864 static Lisp_Object apply_lambda (Lisp_Object fun,
|
|
|
2865 int nargs, Lisp_Object args);
|
|
|
2866 static Lisp_Object funcall_subr (struct Lisp_Subr *sub, Lisp_Object args[]);
|
|
|
2867
|
|
|
2868 static int in_warnings;
|
|
|
2869
|
|
|
2870 static Lisp_Object
|
|
|
2871 in_warnings_restore (Lisp_Object minimus)
|
|
|
2872 {
|
|
|
2873 in_warnings = 0;
|
|
|
2874 return Qnil;
|
|
|
2875 }
|
|
|
2876
|
|
|
2877
|
|
20
|
2878 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2879 Evaluate FORM and return its value.
|
|
20
|
2880 */
|
|
|
2881 (form))
|
|
0
|
2882 {
|
|
|
2883 /* This function can GC */
|
|
|
2884 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2885 int nargs;
|
|
|
2886 struct backtrace backtrace;
|
|
|
2887
|
|
|
2888 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2889 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2890 {
|
|
|
2891 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2892 int speccount = specpdl_depth ();
|
|
|
2893 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2894
|
|
|
2895 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2896 in_warnings = 1;
|
|
|
2897 this_warning_cons = Vpending_warnings;
|
|
|
2898 this_warning = XCAR (this_warning_cons);
|
|
|
2899 /* in case an error occurs in the warn function, at least
|
|
|
2900 it won't happen infinitely */
|
|
|
2901 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2902 free_cons (XCONS (this_warning_cons));
|
|
|
2903 class = XCAR (this_warning);
|
|
|
2904 level = XCAR (XCDR (this_warning));
|
|
|
2905 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2906 free_list (this_warning);
|
|
|
2907
|
|
|
2908 if (NILP (Vpending_warnings))
|
|
|
2909 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2910 but safer */
|
|
|
2911
|
|
|
2912 GCPRO4 (form, class, level, messij);
|
|
|
2913 if (!STRINGP (messij))
|
|
|
2914 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2915 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2916 UNGCPRO;
|
|
|
2917 unbind_to (speccount, Qnil);
|
|
|
2918 }
|
|
|
2919
|
|
|
2920 if (!CONSP (form))
|
|
|
2921 {
|
|
|
2922 if (!SYMBOLP (form))
|
|
|
2923 return form;
|
|
|
2924
|
|
|
2925 val = Fsymbol_value (form);
|
|
|
2926
|
|
|
2927 return val;
|
|
|
2928 }
|
|
|
2929
|
|
|
2930 QUIT;
|
|
|
2931 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2932 {
|
|
|
2933 struct gcpro gcpro1;
|
|
|
2934 GCPRO1 (form);
|
|
|
2935 garbage_collect_1 ();
|
|
|
2936 UNGCPRO;
|
|
|
2937 }
|
|
|
2938
|
|
|
2939 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2940 {
|
|
|
2941 if (max_lisp_eval_depth < 100)
|
|
|
2942 max_lisp_eval_depth = 100;
|
|
|
2943 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2944 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2945 }
|
|
|
2946
|
|
|
2947 original_fun = Fcar (form);
|
|
|
2948 original_args = Fcdr (form);
|
|
|
2949 nargs = XINT (Flength (original_args));
|
|
|
2950
|
|
|
2951 #ifdef EMACS_BTL
|
|
|
2952 backtrace.id_number = 0;
|
|
|
2953 #endif
|
|
|
2954 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
2955 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2956 backtrace.args = &original_args;
|
|
|
2957 backtrace.nargs = UNEVALLED;
|
|
|
2958 backtrace.evalargs = 1;
|
|
|
2959 backtrace.debug_on_exit = 0;
|
|
116
|
2960 PUSH_BACKTRACE (backtrace);
|
|
0
|
2961
|
|
|
2962 if (debug_on_next_call)
|
|
|
2963 do_debug_on_call (Qt);
|
|
|
2964
|
|
|
2965 /* At this point, only original_fun and original_args
|
|
|
2966 have values that will be used below */
|
|
|
2967 retry:
|
|
|
2968 fun = indirect_function (original_fun, 1);
|
|
|
2969
|
|
|
2970 if (SUBRP (fun))
|
|
|
2971 {
|
|
|
2972 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
2973 int max_args = subr->max_args;
|
|
|
2974 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
2975 Lisp_Object args_left;
|
|
|
2976 REGISTER int i;
|
|
|
2977
|
|
|
2978 args_left = original_args;
|
|
|
2979
|
|
|
2980 if (nargs < subr->min_args
|
|
|
2981 || (max_args >= 0 && max_args < nargs))
|
|
|
2982 {
|
|
|
2983 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2984 list2 (fun, make_int (nargs)));
|
|
|
2985 }
|
|
|
2986
|
|
|
2987 if (max_args == UNEVALLED)
|
|
|
2988 {
|
|
|
2989 backtrace.evalargs = 0;
|
|
|
2990 val = ((subr_function (subr)) (args_left));
|
|
|
2991 }
|
|
|
2992
|
|
|
2993 else if (max_args == MANY)
|
|
|
2994 {
|
|
|
2995 /* Pass a vector of evaluated arguments */
|
|
|
2996 Lisp_Object *vals;
|
|
|
2997 REGISTER int argnum;
|
|
|
2998 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
2999
|
|
|
3000 vals = (Lisp_Object *) alloca (nargs * sizeof (Lisp_Object));
|
|
|
3001
|
|
|
3002 GCPRO3 (args_left, fun, vals[0]);
|
|
|
3003 gcpro3.nvars = 0;
|
|
|
3004
|
|
|
3005 argnum = 0;
|
|
|
3006 while (!NILP (args_left))
|
|
|
3007 {
|
|
|
3008 vals[argnum++] = Feval (Fcar (args_left));
|
|
|
3009 args_left = Fcdr (args_left);
|
|
|
3010 gcpro3.nvars = argnum;
|
|
|
3011 }
|
|
|
3012
|
|
|
3013 backtrace.args = vals;
|
|
|
3014 backtrace.nargs = nargs;
|
|
|
3015
|
|
74
|
3016 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3017 (nargs, vals);
|
|
0
|
3018
|
|
|
3019 /* Have to duplicate this code because if the
|
|
|
3020 * debugger is called it must be in a scope in
|
|
|
3021 * which the `alloca'-ed data in vals is still valid.
|
|
|
3022 * (And GC-protected.)
|
|
|
3023 */
|
|
|
3024 lisp_eval_depth--;
|
|
|
3025 if (backtrace.debug_on_exit)
|
|
|
3026 val = do_debug_on_exit (val);
|
|
116
|
3027 POP_BACKTRACE (backtrace);
|
|
0
|
3028 UNGCPRO;
|
|
|
3029 return (val);
|
|
|
3030 }
|
|
|
3031
|
|
|
3032 else
|
|
|
3033 {
|
|
|
3034 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3035
|
|
|
3036 GCPRO3 (args_left, fun, fun);
|
|
|
3037 gcpro3.var = argvals;
|
|
|
3038 gcpro3.nvars = 0;
|
|
|
3039
|
|
|
3040 for (i = 0; i < nargs; args_left = Fcdr (args_left))
|
|
|
3041 {
|
|
|
3042 argvals[i] = Feval (Fcar (args_left));
|
|
|
3043 gcpro3.nvars = ++i;
|
|
|
3044 }
|
|
|
3045
|
|
|
3046 UNGCPRO;
|
|
|
3047
|
|
|
3048 for (i = nargs; i < max_args; i++)
|
|
|
3049 argvals[i] = Qnil;
|
|
|
3050
|
|
|
3051 backtrace.args = argvals;
|
|
|
3052 backtrace.nargs = nargs;
|
|
|
3053
|
|
|
3054 val = funcall_subr (subr, argvals);
|
|
|
3055 }
|
|
|
3056 }
|
|
|
3057 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3058 val = apply_lambda (fun, nargs, original_args);
|
|
|
3059 else
|
|
|
3060 {
|
|
|
3061 Lisp_Object funcar;
|
|
|
3062
|
|
|
3063 if (!CONSP (fun))
|
|
|
3064 goto invalid_function;
|
|
|
3065 funcar = Fcar (fun);
|
|
|
3066 if (!SYMBOLP (funcar))
|
|
|
3067 goto invalid_function;
|
|
|
3068 if (EQ (funcar, Qautoload))
|
|
|
3069 {
|
|
|
3070 do_autoload (fun, original_fun);
|
|
|
3071 goto retry;
|
|
|
3072 }
|
|
|
3073 if (EQ (funcar, Qmacro))
|
|
|
3074 val = Feval (apply1 (Fcdr (fun), original_args));
|
|
|
3075 else if (EQ (funcar, Qlambda))
|
|
|
3076 val = apply_lambda (fun, nargs, original_args);
|
|
|
3077 else
|
|
|
3078 {
|
|
|
3079 invalid_function:
|
|
|
3080 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3081 }
|
|
|
3082 }
|
|
|
3083
|
|
|
3084 lisp_eval_depth--;
|
|
|
3085 if (backtrace.debug_on_exit)
|
|
|
3086 val = do_debug_on_exit (val);
|
|
116
|
3087 POP_BACKTRACE (backtrace);
|
|
0
|
3088 return (val);
|
|
|
3089 }
|
|
|
3090
|
|
|
3091
|
|
|
3092 Lisp_Object
|
|
|
3093 funcall_recording_as (Lisp_Object recorded_as, int nargs,
|
|
|
3094 Lisp_Object *args)
|
|
|
3095 {
|
|
|
3096 /* This function can GC */
|
|
|
3097 Lisp_Object fun;
|
|
|
3098 Lisp_Object val;
|
|
|
3099 struct backtrace backtrace;
|
|
|
3100 REGISTER int i;
|
|
|
3101
|
|
|
3102 QUIT;
|
|
|
3103 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3104 /* Callers should gcpro lexpr args */
|
|
|
3105 garbage_collect_1 ();
|
|
|
3106
|
|
|
3107 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3108 {
|
|
|
3109 if (max_lisp_eval_depth < 100)
|
|
|
3110 max_lisp_eval_depth = 100;
|
|
|
3111 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3112 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3113 }
|
|
|
3114
|
|
|
3115 /* Count number of arguments to function */
|
|
|
3116 nargs = nargs - 1;
|
|
|
3117
|
|
|
3118 #ifdef EMACS_BTL
|
|
|
3119 backtrace.id_number = 0;
|
|
|
3120 #endif
|
|
|
3121 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
3122 backtrace.function = &args[0];
|
|
|
3123 backtrace.args = &args[1];
|
|
|
3124 backtrace.nargs = nargs;
|
|
|
3125 backtrace.evalargs = 0;
|
|
|
3126 backtrace.debug_on_exit = 0;
|
|
116
|
3127 PUSH_BACKTRACE (backtrace);
|
|
0
|
3128
|
|
|
3129 if (debug_on_next_call)
|
|
|
3130 do_debug_on_call (Qlambda);
|
|
|
3131
|
|
|
3132 retry:
|
|
|
3133
|
|
|
3134 fun = args[0];
|
|
|
3135
|
|
|
3136 #ifdef EMACS_BTL
|
|
|
3137 {
|
|
|
3138 extern int emacs_btl_elisp_only_p;
|
|
|
3139 extern int btl_symbol_id_number ();
|
|
|
3140 if (emacs_btl_elisp_only_p)
|
|
|
3141 backtrace.id_number = btl_symbol_id_number (fun);
|
|
|
3142 }
|
|
|
3143 #endif
|
|
|
3144
|
|
|
3145 if (SYMBOLP (fun))
|
|
|
3146 fun = indirect_function (fun, 1);
|
|
|
3147
|
|
|
3148 if (SUBRP (fun))
|
|
|
3149 {
|
|
|
3150 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3151 int max_args = subr->max_args;
|
|
|
3152
|
|
|
3153 if (max_args == UNEVALLED)
|
|
|
3154 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3155
|
|
|
3156 if (nargs < subr->min_args
|
|
|
3157 || (max_args >= 0 && max_args < nargs))
|
|
|
3158 {
|
|
|
3159 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3160 list2 (fun, make_int (nargs)));
|
|
|
3161 }
|
|
|
3162
|
|
|
3163 if (max_args == MANY)
|
|
|
3164 {
|
|
74
|
3165 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3166 (nargs, args + 1);
|
|
0
|
3167 }
|
|
|
3168
|
|
|
3169 else if (max_args > nargs)
|
|
|
3170 {
|
|
|
3171 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
3172
|
|
|
3173 /* Default optionals to nil */
|
|
|
3174 for (i = 0; i < nargs; i++)
|
|
|
3175 argvals[i] = args[i + 1];
|
|
|
3176 for (i = nargs; i < max_args; i++)
|
|
|
3177 argvals[i] = Qnil;
|
|
|
3178
|
|
|
3179 val = funcall_subr (subr, argvals);
|
|
|
3180 }
|
|
|
3181 else
|
|
|
3182 val = funcall_subr (subr, args + 1);
|
|
|
3183 }
|
|
|
3184 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3185 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3186 else if (!CONSP (fun))
|
|
|
3187 {
|
|
|
3188 invalid_function:
|
|
|
3189 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3190 }
|
|
|
3191 else
|
|
|
3192 {
|
|
|
3193 Lisp_Object funcar = Fcar (fun);
|
|
|
3194
|
|
|
3195 if (!SYMBOLP (funcar))
|
|
|
3196 goto invalid_function;
|
|
|
3197 if (EQ (funcar, Qlambda))
|
|
|
3198 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3199 else if (EQ (funcar, Qautoload))
|
|
|
3200 {
|
|
|
3201 do_autoload (fun, args[0]);
|
|
|
3202 goto retry;
|
|
|
3203 }
|
|
|
3204 else
|
|
|
3205 {
|
|
|
3206 goto invalid_function;
|
|
|
3207 }
|
|
|
3208 }
|
|
|
3209 lisp_eval_depth--;
|
|
|
3210 if (backtrace.debug_on_exit)
|
|
|
3211 val = do_debug_on_exit (val);
|
|
116
|
3212 POP_BACKTRACE (backtrace);
|
|
0
|
3213 return val;
|
|
|
3214 }
|
|
|
3215
|
|
20
|
3216 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
0
|
3217 Call first argument as a function, passing remaining arguments to it.
|
|
|
3218 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
20
|
3219 */
|
|
|
3220 (int nargs, Lisp_Object *args))
|
|
0
|
3221 {
|
|
|
3222 return funcall_recording_as (args[0], nargs, args);
|
|
|
3223 }
|
|
|
3224
|
|
20
|
3225 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
0
|
3226 Return the number of arguments a function may be called with. The
|
|
|
3227 function may be any form that can be passed to `funcall', any special
|
|
|
3228 form, or any macro.
|
|
20
|
3229 */
|
|
|
3230 (function))
|
|
0
|
3231 {
|
|
|
3232 Lisp_Object orig_function = function;
|
|
|
3233 Lisp_Object arglist;
|
|
|
3234 int argcount;
|
|
|
3235
|
|
|
3236 retry:
|
|
|
3237
|
|
|
3238 if (SYMBOLP (function))
|
|
|
3239 function = indirect_function (function, 1);
|
|
|
3240
|
|
|
3241 if (SUBRP (function))
|
|
|
3242 return Fsubr_min_args (function);
|
|
|
3243 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3244 {
|
|
|
3245 invalid_function:
|
|
|
3246 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3247 }
|
|
|
3248
|
|
|
3249 if (CONSP (function))
|
|
|
3250 {
|
|
|
3251 Lisp_Object funcar = Fcar (function);
|
|
|
3252
|
|
|
3253 if (!SYMBOLP (funcar))
|
|
|
3254 goto invalid_function;
|
|
|
3255 if (EQ (funcar, Qmacro))
|
|
|
3256 {
|
|
|
3257 function = Fcdr (function);
|
|
|
3258 goto retry;
|
|
|
3259 }
|
|
|
3260 if (EQ (funcar, Qautoload))
|
|
|
3261 {
|
|
|
3262 do_autoload (function, orig_function);
|
|
|
3263 goto retry;
|
|
|
3264 }
|
|
|
3265 if (EQ (funcar, Qlambda))
|
|
|
3266 arglist = Fcar (Fcdr (function));
|
|
|
3267 else
|
|
|
3268 goto invalid_function;
|
|
|
3269 }
|
|
|
3270 else
|
|
|
3271 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3272
|
|
|
3273 argcount = 0;
|
|
|
3274 while (!NILP (arglist))
|
|
|
3275 {
|
|
|
3276 QUIT;
|
|
|
3277 if (EQ (Fcar (arglist), Qand_optional)
|
|
|
3278 || EQ (Fcar (arglist), Qand_rest))
|
|
|
3279 break;
|
|
|
3280 argcount++;
|
|
|
3281 arglist = Fcdr (arglist);
|
|
|
3282 }
|
|
|
3283
|
|
|
3284 return make_int (argcount);
|
|
|
3285 }
|
|
|
3286
|
|
20
|
3287 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
0
|
3288 Return the number of arguments a function may be called with. If the
|
|
|
3289 function takes an arbitrary number of arguments or is a built-in
|
|
|
3290 special form, nil is returned. The function may be any form that can
|
|
|
3291 be passed to `funcall', any special form, or any macro.
|
|
20
|
3292 */
|
|
|
3293 (function))
|
|
0
|
3294 {
|
|
|
3295 Lisp_Object orig_function = function;
|
|
|
3296 Lisp_Object arglist;
|
|
|
3297 int argcount;
|
|
|
3298
|
|
|
3299 retry:
|
|
|
3300
|
|
|
3301 if (SYMBOLP (function))
|
|
|
3302 function = indirect_function (function, 1);
|
|
|
3303
|
|
|
3304 if (SUBRP (function))
|
|
|
3305 return Fsubr_max_args (function);
|
|
|
3306 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3307 {
|
|
|
3308 invalid_function:
|
|
|
3309 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3310 }
|
|
|
3311
|
|
|
3312 if (CONSP (function))
|
|
|
3313 {
|
|
|
3314 Lisp_Object funcar = Fcar (function);
|
|
|
3315
|
|
|
3316 if (!SYMBOLP (funcar))
|
|
|
3317 goto invalid_function;
|
|
|
3318 if (EQ (funcar, Qmacro))
|
|
|
3319 {
|
|
|
3320 function = Fcdr (function);
|
|
|
3321 goto retry;
|
|
|
3322 }
|
|
|
3323 if (EQ (funcar, Qautoload))
|
|
|
3324 {
|
|
|
3325 do_autoload (function, orig_function);
|
|
|
3326 goto retry;
|
|
|
3327 }
|
|
|
3328 if (EQ (funcar, Qlambda))
|
|
|
3329 arglist = Fcar (Fcdr (function));
|
|
|
3330 else
|
|
|
3331 goto invalid_function;
|
|
|
3332 }
|
|
|
3333 else
|
|
|
3334 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3335
|
|
|
3336 argcount = 0;
|
|
|
3337 while (!NILP (arglist))
|
|
|
3338 {
|
|
|
3339 QUIT;
|
|
|
3340 if (EQ (Fcar (arglist), Qand_optional))
|
|
|
3341 {
|
|
|
3342 arglist = Fcdr (arglist);
|
|
|
3343 continue;
|
|
|
3344 }
|
|
|
3345 if (EQ (Fcar (arglist), Qand_rest))
|
|
|
3346 return Qnil;
|
|
|
3347 argcount++;
|
|
|
3348 arglist = Fcdr (arglist);
|
|
|
3349 }
|
|
|
3350
|
|
|
3351 return make_int (argcount);
|
|
|
3352 }
|
|
|
3353
|
|
|
3354
|
|
20
|
3355 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
0
|
3356 Call FUNCTION with our remaining args, using our last arg as list of args.
|
|
|
3357 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3358 */
|
|
|
3359 (int nargs, Lisp_Object *args))
|
|
0
|
3360 {
|
|
|
3361 /* This function can GC */
|
|
|
3362 Lisp_Object fun = args[0];
|
|
|
3363 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3364 int numargs;
|
|
|
3365 int funcall_nargs;
|
|
|
3366
|
|
|
3367 CHECK_LIST (spread_arg);
|
|
|
3368
|
|
|
3369 numargs = XINT (Flength (spread_arg));
|
|
|
3370
|
|
|
3371 if (numargs == 0)
|
|
|
3372 /* (apply foo 0 1 '()) */
|
|
|
3373 return Ffuncall (nargs - 1, args);
|
|
|
3374 else if (numargs == 1)
|
|
|
3375 {
|
|
|
3376 /* (apply foo 0 1 '(2)) */
|
|
|
3377 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3378 return Ffuncall (nargs, args);
|
|
|
3379 }
|
|
|
3380
|
|
|
3381 /* -1 for function, -1 for spread arg */
|
|
|
3382 numargs = nargs - 2 + numargs;
|
|
|
3383 /* +1 for function */
|
|
|
3384 funcall_nargs = 1 + numargs;
|
|
|
3385
|
|
|
3386 if (SYMBOLP (fun))
|
|
|
3387 fun = indirect_function (fun, 0);
|
|
|
3388 if (UNBOUNDP (fun))
|
|
|
3389 {
|
|
|
3390 /* Let funcall get the error */
|
|
|
3391 fun = args[0];
|
|
|
3392 }
|
|
|
3393 else if (SUBRP (fun))
|
|
|
3394 {
|
|
|
3395 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3396 int max_args = subr->max_args;
|
|
|
3397
|
|
|
3398 if (numargs < subr->min_args
|
|
|
3399 || (max_args >= 0 && max_args < numargs))
|
|
|
3400 {
|
|
|
3401 /* Let funcall get the error */
|
|
|
3402 }
|
|
|
3403 else if (max_args > numargs)
|
|
|
3404 {
|
|
|
3405 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3406 by explicitly supplying nil's for optional values */
|
|
|
3407 funcall_nargs += (max_args - numargs);
|
|
|
3408 }
|
|
|
3409 }
|
|
|
3410 {
|
|
|
3411 REGISTER int i;
|
|
|
3412 REGISTER Lisp_Object *funcall_args
|
|
|
3413 = (Lisp_Object *) alloca (funcall_nargs * sizeof (Lisp_Object));
|
|
|
3414 struct gcpro gcpro1;
|
|
|
3415
|
|
|
3416 GCPRO1 (*funcall_args);
|
|
|
3417 gcpro1.nvars = funcall_nargs;
|
|
|
3418
|
|
|
3419 /* Copy in the unspread args */
|
|
|
3420 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3421 /* Spread the last arg we got. Its first element goes in
|
|
|
3422 the slot that it used to occupy, hence this value of I. */
|
|
|
3423 for (i = nargs - 1;
|
|
|
3424 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3425 i++, spread_arg = XCDR (spread_arg))
|
|
|
3426 {
|
|
|
3427 funcall_args [i] = XCAR (spread_arg);
|
|
|
3428 }
|
|
|
3429 /* Supply nil for optional args (to subrs) */
|
|
|
3430 for (; i < funcall_nargs; i++)
|
|
|
3431 funcall_args[i] = Qnil;
|
|
|
3432
|
|
|
3433
|
|
|
3434 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3435 }
|
|
|
3436 }
|
|
|
3437
|
|
|
3438
|
|
74
|
3439 /* Define proper types and argument lists simultaneously */
|
|
|
3440 #define PRIMITIVE_FUNCALL(n) ((Lisp_Object (*) (PRIMITIVE_FUNCALL_##n)
|
|
|
3441 #define PRIMITIVE_FUNCALL_0 void)) (fn)) (
|
|
|
3442 #define PRIMITIVE_FUNCALL_1 Lisp_Object)) (fn)) (args[0]
|
|
|
3443 #define PRIMITIVE_FUNCALL_2 Lisp_Object, PRIMITIVE_FUNCALL_1, args[1]
|
|
|
3444 #define PRIMITIVE_FUNCALL_3 Lisp_Object, PRIMITIVE_FUNCALL_2, args[2]
|
|
|
3445 #define PRIMITIVE_FUNCALL_4 Lisp_Object, PRIMITIVE_FUNCALL_3, args[3]
|
|
|
3446 #define PRIMITIVE_FUNCALL_5 Lisp_Object, PRIMITIVE_FUNCALL_4, args[4]
|
|
|
3447 #define PRIMITIVE_FUNCALL_6 Lisp_Object, PRIMITIVE_FUNCALL_5, args[5]
|
|
|
3448 #define PRIMITIVE_FUNCALL_7 Lisp_Object, PRIMITIVE_FUNCALL_6, args[6]
|
|
|
3449 #define PRIMITIVE_FUNCALL_8 Lisp_Object, PRIMITIVE_FUNCALL_7, args[7]
|
|
|
3450 #define PRIMITIVE_FUNCALL_9 Lisp_Object, PRIMITIVE_FUNCALL_8, args[8]
|
|
|
3451 #define PRIMITIVE_FUNCALL_10 Lisp_Object, PRIMITIVE_FUNCALL_9, args[9]
|
|
|
3452 #define PRIMITIVE_FUNCALL_11 Lisp_Object, PRIMITIVE_FUNCALL_10, args[10]
|
|
|
3453 #define PRIMITIVE_FUNCALL_12 Lisp_Object, PRIMITIVE_FUNCALL_11, args[11]
|
|
|
3454
|
|
0
|
3455 static Lisp_Object
|
|
74
|
3456 primitive_funcall (lisp_fn_t fn, int nargs, Lisp_Object args[])
|
|
0
|
3457 {
|
|
|
3458 switch (nargs)
|
|
|
3459 {
|
|
74
|
3460 case 0: return PRIMITIVE_FUNCALL(0);
|
|
|
3461 case 1: return PRIMITIVE_FUNCALL(1);
|
|
|
3462 case 2: return PRIMITIVE_FUNCALL(2);
|
|
|
3463 case 3: return PRIMITIVE_FUNCALL(3);
|
|
|
3464 case 4: return PRIMITIVE_FUNCALL(4);
|
|
|
3465 case 5: return PRIMITIVE_FUNCALL(5);
|
|
|
3466 case 6: return PRIMITIVE_FUNCALL(6);
|
|
|
3467 case 7: return PRIMITIVE_FUNCALL(7);
|
|
|
3468 case 8: return PRIMITIVE_FUNCALL(8);
|
|
|
3469 case 9: return PRIMITIVE_FUNCALL(9);
|
|
|
3470 case 10: return PRIMITIVE_FUNCALL(10);
|
|
|
3471 case 11: return PRIMITIVE_FUNCALL(11);
|
|
|
3472 case 12: return PRIMITIVE_FUNCALL(12);
|
|
0
|
3473 }
|
|
74
|
3474
|
|
|
3475 /* Someone has created a subr that takes more arguments than is
|
|
|
3476 supported by this code. We need to either rewrite the subr to
|
|
|
3477 use a different argument protocol, or add more cases to this
|
|
|
3478 switch. */
|
|
|
3479 abort ();
|
|
0
|
3480 return Qnil; /* suppress compiler warning */
|
|
|
3481 }
|
|
|
3482
|
|
|
3483 static Lisp_Object
|
|
|
3484 funcall_subr (struct Lisp_Subr *subr, Lisp_Object args[])
|
|
|
3485 {
|
|
|
3486 return primitive_funcall (subr_function (subr), subr->max_args, args);
|
|
|
3487 }
|
|
|
3488
|
|
|
3489 /* FSFmacs has an extra arg EVAL_FLAG. If false, some of
|
|
|
3490 the statements below are not done. But it's always true
|
|
|
3491 in all the calls to apply_lambda(). */
|
|
|
3492
|
|
|
3493 static Lisp_Object
|
|
|
3494 apply_lambda (Lisp_Object fun, int numargs, Lisp_Object unevalled_args)
|
|
|
3495 {
|
|
|
3496 /* This function can GC */
|
|
|
3497 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3498 REGISTER int i;
|
|
|
3499 REGISTER Lisp_Object tem;
|
|
|
3500 REGISTER Lisp_Object *arg_vector
|
|
|
3501 = (Lisp_Object *) alloca (numargs * sizeof (Lisp_Object));
|
|
|
3502
|
|
|
3503 GCPRO3 (*arg_vector, unevalled_args, fun);
|
|
|
3504 gcpro1.nvars = 0;
|
|
|
3505
|
|
|
3506 for (i = 0; i < numargs;)
|
|
|
3507 {
|
|
|
3508 tem = Fcar (unevalled_args), unevalled_args = Fcdr (unevalled_args);
|
|
|
3509 tem = Feval (tem);
|
|
|
3510 arg_vector[i++] = tem;
|
|
|
3511 gcpro1.nvars = i;
|
|
|
3512 }
|
|
|
3513
|
|
|
3514 UNGCPRO;
|
|
|
3515
|
|
|
3516 backtrace_list->args = arg_vector;
|
|
|
3517 backtrace_list->nargs = i;
|
|
|
3518 backtrace_list->evalargs = 0;
|
|
|
3519 tem = funcall_lambda (fun, numargs, arg_vector);
|
|
|
3520
|
|
|
3521 /* Do the debug-on-exit now, while arg_vector still exists. */
|
|
|
3522 if (backtrace_list->debug_on_exit)
|
|
|
3523 tem = do_debug_on_exit (tem);
|
|
|
3524 /* Don't do it again when we return to eval. */
|
|
|
3525 backtrace_list->debug_on_exit = 0;
|
|
|
3526 return (tem);
|
|
|
3527 }
|
|
|
3528
|
|
|
3529 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
|
|
|
3530 and return the result of evaluation.
|
|
|
3531 FUN must be either a lambda-expression or a compiled-code object. */
|
|
|
3532
|
|
|
3533 static Lisp_Object
|
|
|
3534 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object arg_vector[])
|
|
|
3535 {
|
|
|
3536 /* This function can GC */
|
|
|
3537 Lisp_Object val, tem;
|
|
|
3538 REGISTER Lisp_Object syms_left;
|
|
|
3539 REGISTER Lisp_Object next;
|
|
|
3540 int speccount = specpdl_depth_counter;
|
|
|
3541 REGISTER int i;
|
|
|
3542 int optional = 0, rest = 0;
|
|
|
3543
|
|
|
3544 if (CONSP (fun))
|
|
|
3545 syms_left = Fcar (Fcdr (fun));
|
|
|
3546 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3547 syms_left = XCOMPILED_FUNCTION (fun)->arglist;
|
|
|
3548 else abort ();
|
|
|
3549
|
|
|
3550 i = 0;
|
|
|
3551 for (; !NILP (syms_left); syms_left = Fcdr (syms_left))
|
|
|
3552 {
|
|
|
3553 QUIT;
|
|
|
3554 next = Fcar (syms_left);
|
|
|
3555 if (!SYMBOLP (next))
|
|
|
3556 signal_error (Qinvalid_function, list1 (fun));
|
|
|
3557 if (EQ (next, Qand_rest))
|
|
|
3558 rest = 1;
|
|
|
3559 else if (EQ (next, Qand_optional))
|
|
|
3560 optional = 1;
|
|
|
3561 else if (rest)
|
|
|
3562 {
|
|
|
3563 specbind (next, Flist (nargs - i, &arg_vector[i]));
|
|
|
3564 i = nargs;
|
|
|
3565 }
|
|
|
3566 else if (i < nargs)
|
|
|
3567 {
|
|
|
3568 tem = arg_vector[i++];
|
|
|
3569 specbind (next, tem);
|
|
|
3570 }
|
|
|
3571 else if (!optional)
|
|
|
3572 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3573 list2 (fun, make_int (nargs)));
|
|
|
3574 else
|
|
|
3575 specbind (next, Qnil);
|
|
|
3576 }
|
|
|
3577
|
|
|
3578 if (i < nargs)
|
|
|
3579 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3580 list2 (fun, make_int (nargs)));
|
|
|
3581
|
|
|
3582 if (CONSP (fun))
|
|
|
3583 val = Fprogn (Fcdr (Fcdr (fun)));
|
|
|
3584 else
|
|
|
3585 {
|
|
|
3586 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (fun);
|
|
|
3587 /* If we have not actually read the bytecode string
|
|
|
3588 and constants vector yet, fetch them from the file. */
|
|
|
3589 if (CONSP (b->bytecodes))
|
|
|
3590 Ffetch_bytecode (fun);
|
|
|
3591 val = Fbyte_code (b->bytecodes,
|
|
|
3592 b->constants,
|
|
|
3593 make_int (b->maxdepth));
|
|
|
3594 }
|
|
|
3595 return unbind_to (speccount, val);
|
|
|
3596 }
|
|
|
3597
|
|
20
|
3598 DEFUN ("fetch-bytecode", Ffetch_bytecode, 1, 1, 0, /*
|
|
0
|
3599 If byte-compiled OBJECT is lazy-loaded, fetch it now.
|
|
20
|
3600 */
|
|
|
3601 (object))
|
|
0
|
3602 {
|
|
|
3603 Lisp_Object tem;
|
|
|
3604
|
|
|
3605 if (COMPILED_FUNCTIONP (object)
|
|
|
3606 && CONSP (XCOMPILED_FUNCTION (object)->bytecodes))
|
|
|
3607 {
|
|
|
3608 tem = read_doc_string (XCOMPILED_FUNCTION (object)->bytecodes);
|
|
|
3609 if (!CONSP (tem))
|
|
|
3610 signal_simple_error ("invalid lazy-loaded byte code", tem);
|
|
70
|
3611 /* v18 or v19 bytecode file. Need to Ebolify. */
|
|
|
3612 if (XCOMPILED_FUNCTION (object)->flags.ebolified
|
|
|
3613 && VECTORP (XCDR (tem)))
|
|
|
3614 ebolify_bytecode_constants (XCDR (tem));
|
|
0
|
3615 /* VERY IMPORTANT to purecopy here!!!!!
|
|
|
3616 See load_force_doc_string_unwind. */
|
|
|
3617 XCOMPILED_FUNCTION (object)->bytecodes = Fpurecopy (XCAR (tem));
|
|
|
3618 XCOMPILED_FUNCTION (object)->constants = Fpurecopy (XCDR (tem));
|
|
|
3619 }
|
|
|
3620 return object;
|
|
|
3621 }
|
|
|
3622
|
|
|
3623
|
|
|
3624 /**********************************************************************/
|
|
|
3625 /* Run hook variables in various ways. */
|
|
|
3626 /**********************************************************************/
|
|
|
3627
|
|
20
|
3628 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3629 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3630 Each argument should be a symbol, a hook variable.
|
|
|
3631 These symbols are processed in the order specified.
|
|
|
3632 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3633 or a list of functions to be called to run the hook.
|
|
|
3634 If the value is a function, it is called with no arguments.
|
|
|
3635 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3636
|
|
|
3637 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3638 not `make-local-variable'.
|
|
20
|
3639 */
|
|
|
3640 (int nargs, Lisp_Object *args))
|
|
0
|
3641 {
|
|
|
3642 Lisp_Object hook[1];
|
|
|
3643 REGISTER int i;
|
|
|
3644
|
|
|
3645 for (i = 0; i < nargs; i++)
|
|
|
3646 {
|
|
|
3647 hook[0] = args[i];
|
|
|
3648 run_hook_with_args (1, hook, RUN_HOOKS_TO_COMPLETION);
|
|
|
3649 }
|
|
|
3650
|
|
|
3651 return Qnil;
|
|
|
3652 }
|
|
|
3653
|
|
20
|
3654 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3655 Run HOOK with the specified arguments ARGS.
|
|
|
3656 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3657 value, that value may be a function or a list of functions to be
|
|
|
3658 called to run the hook. If the value is a function, it is called with
|
|
|
3659 the given arguments and its return value is returned. If it is a list
|
|
|
3660 of functions, those functions are called, in order,
|
|
|
3661 with the given arguments ARGS.
|
|
|
3662 It is best not to depend on the value return by `run-hook-with-args',
|
|
|
3663 as that may change.
|
|
|
3664
|
|
|
3665 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3666 not `make-local-variable'.
|
|
20
|
3667 */
|
|
|
3668 (int nargs, Lisp_Object *args))
|
|
0
|
3669 {
|
|
|
3670 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3671 }
|
|
|
3672
|
|
20
|
3673 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3674 Run HOOK with the specified arguments ARGS.
|
|
|
3675 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3676 be a list of functions. We call those functions, one by one,
|
|
|
3677 passing arguments ARGS to each of them, until one of them
|
|
|
3678 returns a non-nil value. Then we return that value.
|
|
|
3679 If all the functions return nil, we return nil.
|
|
|
3680
|
|
|
3681 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3682 not `make-local-variable'.
|
|
20
|
3683 */
|
|
|
3684 (int nargs, Lisp_Object *args))
|
|
0
|
3685 {
|
|
|
3686 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3687 }
|
|
|
3688
|
|
20
|
3689 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3690 Run HOOK with the specified arguments ARGS.
|
|
|
3691 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3692 be a list of functions. We call those functions, one by one,
|
|
|
3693 passing arguments ARGS to each of them, until one of them
|
|
|
3694 returns nil. Then we return nil.
|
|
|
3695 If all the functions return non-nil, we return non-nil.
|
|
|
3696
|
|
|
3697 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3698 not `make-local-variable'.
|
|
20
|
3699 */
|
|
|
3700 (int nargs, Lisp_Object *args))
|
|
0
|
3701 {
|
|
|
3702 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3703 }
|
|
|
3704
|
|
|
3705 /* ARGS[0] should be a hook symbol.
|
|
|
3706 Call each of the functions in the hook value, passing each of them
|
|
|
3707 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3708 COND specifies a condition to test after each call
|
|
|
3709 to decide whether to stop.
|
|
|
3710 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3711 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3712
|
|
|
3713 Lisp_Object
|
|
|
3714 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3715 enum run_hooks_condition cond)
|
|
|
3716 {
|
|
|
3717 Lisp_Object sym, val, ret;
|
|
|
3718 struct gcpro gcpro1, gcpro2;
|
|
|
3719
|
|
|
3720 if (!initialized || preparing_for_armageddon)
|
|
|
3721 /* We need to bail out of here pronto. */
|
|
|
3722 return Qnil;
|
|
|
3723
|
|
|
3724 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3725 will also be true unless something is really hosed. */
|
|
|
3726 assert (!gc_in_progress);
|
|
|
3727
|
|
|
3728 sym = args[0];
|
|
|
3729 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3730 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3731
|
|
|
3732 if (UNBOUNDP (val) || NILP (val))
|
|
|
3733 return ret;
|
|
|
3734 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3735 {
|
|
|
3736 args[0] = val;
|
|
|
3737 return Ffuncall (nargs, args);
|
|
|
3738 }
|
|
|
3739 else
|
|
|
3740 {
|
|
|
3741 GCPRO2 (sym, val);
|
|
|
3742
|
|
|
3743 for (;
|
|
|
3744 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3745 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3746 : !NILP (ret)));
|
|
|
3747 val = XCDR (val))
|
|
|
3748 {
|
|
|
3749 if (EQ (XCAR (val), Qt))
|
|
|
3750 {
|
|
|
3751 /* t indicates this hook has a local binding;
|
|
|
3752 it means to run the global binding too. */
|
|
|
3753 Lisp_Object globals;
|
|
|
3754
|
|
|
3755 for (globals = Fdefault_value (sym);
|
|
|
3756 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3757 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3758 ? NILP (ret)
|
|
|
3759 : !NILP (ret)));
|
|
|
3760 globals = XCDR (globals))
|
|
|
3761 {
|
|
|
3762 args[0] = XCAR (globals);
|
|
|
3763 /* In a global value, t should not occur. If it does, we
|
|
|
3764 must ignore it to avoid an endless loop. */
|
|
|
3765 if (!EQ (args[0], Qt))
|
|
|
3766 ret = Ffuncall (nargs, args);
|
|
|
3767 }
|
|
|
3768 }
|
|
|
3769 else
|
|
|
3770 {
|
|
|
3771 args[0] = XCAR (val);
|
|
|
3772 ret = Ffuncall (nargs, args);
|
|
|
3773 }
|
|
|
3774 }
|
|
|
3775
|
|
|
3776 UNGCPRO;
|
|
|
3777 return ret;
|
|
|
3778 }
|
|
|
3779 }
|
|
|
3780
|
|
|
3781 Lisp_Object
|
|
|
3782 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3783 enum run_hooks_condition cond)
|
|
|
3784 {
|
|
|
3785 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3786 }
|
|
|
3787
|
|
|
3788 #if 0
|
|
|
3789
|
|
|
3790 /* From FSF 19.30, not currently used */
|
|
|
3791
|
|
|
3792 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3793 present value of that symbol.
|
|
|
3794 Call each element of FUNLIST,
|
|
|
3795 passing each of them the rest of ARGS.
|
|
|
3796 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3797 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3798
|
|
|
3799 Lisp_Object
|
|
|
3800 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3801 {
|
|
|
3802 Lisp_Object sym;
|
|
|
3803 Lisp_Object val;
|
|
|
3804 struct gcpro gcpro1, gcpro2;
|
|
|
3805
|
|
|
3806 sym = args[0];
|
|
|
3807 GCPRO2 (sym, val);
|
|
|
3808
|
|
|
3809 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3810 {
|
|
|
3811 if (EQ (XCAR (val), Qt))
|
|
|
3812 {
|
|
|
3813 /* t indicates this hook has a local binding;
|
|
|
3814 it means to run the global binding too. */
|
|
|
3815 Lisp_Object globals;
|
|
|
3816
|
|
|
3817 for (globals = Fdefault_value (sym);
|
|
|
3818 CONSP (globals);
|
|
|
3819 globals = XCDR (globals))
|
|
|
3820 {
|
|
|
3821 args[0] = XCAR (globals);
|
|
|
3822 /* In a global value, t should not occur. If it does, we
|
|
|
3823 must ignore it to avoid an endless loop. */
|
|
|
3824 if (!EQ (args[0], Qt))
|
|
|
3825 Ffuncall (nargs, args);
|
|
|
3826 }
|
|
|
3827 }
|
|
|
3828 else
|
|
|
3829 {
|
|
|
3830 args[0] = XCAR (val);
|
|
|
3831 Ffuncall (nargs, args);
|
|
|
3832 }
|
|
|
3833 }
|
|
|
3834 UNGCPRO;
|
|
|
3835 return Qnil;
|
|
|
3836 }
|
|
|
3837
|
|
|
3838 #endif /* 0 */
|
|
|
3839
|
|
|
3840 void
|
|
|
3841 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3842 {
|
|
|
3843 /* This function can GC */
|
|
|
3844 struct gcpro gcpro1;
|
|
|
3845 int i;
|
|
|
3846 va_list vargs;
|
|
|
3847 Lisp_Object *funcall_args =
|
|
|
3848 (Lisp_Object *) alloca ((1 + nargs) * sizeof (Lisp_Object));
|
|
|
3849
|
|
|
3850 va_start (vargs, nargs);
|
|
|
3851 funcall_args[0] = hook_var;
|
|
|
3852 for (i = 0; i < nargs; i++)
|
|
|
3853 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3854 va_end (vargs);
|
|
|
3855
|
|
|
3856 GCPRO1 (*funcall_args);
|
|
|
3857 gcpro1.nvars = nargs + 1;
|
|
|
3858 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3859 UNGCPRO;
|
|
|
3860 }
|
|
|
3861
|
|
|
3862 void
|
|
|
3863 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3864 int nargs, ...)
|
|
|
3865 {
|
|
|
3866 /* This function can GC */
|
|
|
3867 struct gcpro gcpro1;
|
|
|
3868 int i;
|
|
|
3869 va_list vargs;
|
|
|
3870 Lisp_Object *funcall_args =
|
|
|
3871 (Lisp_Object *) alloca ((1 + nargs) * sizeof (Lisp_Object));
|
|
|
3872
|
|
|
3873 va_start (vargs, nargs);
|
|
|
3874 funcall_args[0] = hook_var;
|
|
|
3875 for (i = 0; i < nargs; i++)
|
|
|
3876 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3877 va_end (vargs);
|
|
|
3878
|
|
|
3879 GCPRO1 (*funcall_args);
|
|
|
3880 gcpro1.nvars = nargs + 1;
|
|
|
3881 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3882 RUN_HOOKS_TO_COMPLETION);
|
|
|
3883 UNGCPRO;
|
|
|
3884 }
|
|
|
3885
|
|
|
3886 Lisp_Object
|
|
|
3887 run_hook (Lisp_Object hook)
|
|
|
3888 {
|
|
|
3889 Frun_hooks (1, &hook);
|
|
|
3890 return Qnil;
|
|
|
3891 }
|
|
|
3892
|
|
|
3893
|
|
|
3894 /**********************************************************************/
|
|
|
3895 /* Front-ends to eval, funcall, apply */
|
|
|
3896 /**********************************************************************/
|
|
|
3897
|
|
|
3898 /* Apply fn to arg */
|
|
|
3899 Lisp_Object
|
|
|
3900 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3901 {
|
|
|
3902 /* This function can GC */
|
|
|
3903 struct gcpro gcpro1;
|
|
|
3904 Lisp_Object args[2];
|
|
|
3905
|
|
|
3906 if (NILP (arg))
|
|
|
3907 return (Ffuncall (1, &fn));
|
|
|
3908 GCPRO1 (args[0]);
|
|
|
3909 gcpro1.nvars = 2;
|
|
|
3910 args[0] = fn;
|
|
|
3911 args[1] = arg;
|
|
|
3912 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3913 }
|
|
|
3914
|
|
|
3915 /* Call function fn on no arguments */
|
|
|
3916 Lisp_Object
|
|
|
3917 call0 (Lisp_Object fn)
|
|
|
3918 {
|
|
|
3919 /* This function can GC */
|
|
|
3920 struct gcpro gcpro1;
|
|
|
3921
|
|
|
3922 GCPRO1 (fn);
|
|
|
3923 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3924 }
|
|
|
3925
|
|
|
3926 /* Call function fn with argument arg0 */
|
|
|
3927 Lisp_Object
|
|
|
3928 call1 (Lisp_Object fn,
|
|
|
3929 Lisp_Object arg0)
|
|
|
3930 {
|
|
|
3931 /* This function can GC */
|
|
|
3932 struct gcpro gcpro1;
|
|
|
3933 Lisp_Object args[2];
|
|
|
3934 args[0] = fn;
|
|
|
3935 args[1] = arg0;
|
|
|
3936 GCPRO1 (args[0]);
|
|
|
3937 gcpro1.nvars = 2;
|
|
|
3938 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3939 }
|
|
|
3940
|
|
|
3941 /* Call function fn with arguments arg0, arg1 */
|
|
|
3942 Lisp_Object
|
|
|
3943 call2 (Lisp_Object fn,
|
|
|
3944 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3945 {
|
|
|
3946 /* This function can GC */
|
|
|
3947 struct gcpro gcpro1;
|
|
|
3948 Lisp_Object args[3];
|
|
|
3949 args[0] = fn;
|
|
|
3950 args[1] = arg0;
|
|
|
3951 args[2] = arg1;
|
|
|
3952 GCPRO1 (args[0]);
|
|
|
3953 gcpro1.nvars = 3;
|
|
|
3954 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3955 }
|
|
|
3956
|
|
|
3957 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3958 Lisp_Object
|
|
|
3959 call3 (Lisp_Object fn,
|
|
|
3960 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3961 {
|
|
|
3962 /* This function can GC */
|
|
|
3963 struct gcpro gcpro1;
|
|
|
3964 Lisp_Object args[4];
|
|
|
3965 args[0] = fn;
|
|
|
3966 args[1] = arg0;
|
|
|
3967 args[2] = arg1;
|
|
|
3968 args[3] = arg2;
|
|
|
3969 GCPRO1 (args[0]);
|
|
|
3970 gcpro1.nvars = 4;
|
|
|
3971 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3972 }
|
|
|
3973
|
|
|
3974 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3975 Lisp_Object
|
|
|
3976 call4 (Lisp_Object fn,
|
|
|
3977 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3978 Lisp_Object arg3)
|
|
|
3979 {
|
|
|
3980 /* This function can GC */
|
|
|
3981 struct gcpro gcpro1;
|
|
|
3982 Lisp_Object args[5];
|
|
|
3983 args[0] = fn;
|
|
|
3984 args[1] = arg0;
|
|
|
3985 args[2] = arg1;
|
|
|
3986 args[3] = arg2;
|
|
|
3987 args[4] = arg3;
|
|
|
3988 GCPRO1 (args[0]);
|
|
|
3989 gcpro1.nvars = 5;
|
|
|
3990 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3991 }
|
|
|
3992
|
|
|
3993 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3994 Lisp_Object
|
|
|
3995 call5 (Lisp_Object fn,
|
|
|
3996 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3997 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3998 {
|
|
|
3999 /* This function can GC */
|
|
|
4000 struct gcpro gcpro1;
|
|
|
4001 Lisp_Object args[6];
|
|
|
4002 args[0] = fn;
|
|
|
4003 args[1] = arg0;
|
|
|
4004 args[2] = arg1;
|
|
|
4005 args[3] = arg2;
|
|
|
4006 args[4] = arg3;
|
|
|
4007 args[5] = arg4;
|
|
|
4008 GCPRO1 (args[0]);
|
|
|
4009 gcpro1.nvars = 6;
|
|
|
4010 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4011 }
|
|
|
4012
|
|
|
4013 Lisp_Object
|
|
|
4014 call6 (Lisp_Object fn,
|
|
|
4015 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4016 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4017 {
|
|
|
4018 /* This function can GC */
|
|
|
4019 struct gcpro gcpro1;
|
|
|
4020 Lisp_Object args[7];
|
|
|
4021 args[0] = fn;
|
|
|
4022 args[1] = arg0;
|
|
|
4023 args[2] = arg1;
|
|
|
4024 args[3] = arg2;
|
|
|
4025 args[4] = arg3;
|
|
|
4026 args[5] = arg4;
|
|
|
4027 args[6] = arg5;
|
|
|
4028 GCPRO1 (args[0]);
|
|
|
4029 gcpro1.nvars = 7;
|
|
|
4030 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4031 }
|
|
|
4032
|
|
|
4033 Lisp_Object
|
|
|
4034 call7 (Lisp_Object fn,
|
|
|
4035 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4036 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4037 Lisp_Object arg6)
|
|
|
4038 {
|
|
|
4039 /* This function can GC */
|
|
|
4040 struct gcpro gcpro1;
|
|
|
4041 Lisp_Object args[8];
|
|
|
4042 args[0] = fn;
|
|
|
4043 args[1] = arg0;
|
|
|
4044 args[2] = arg1;
|
|
|
4045 args[3] = arg2;
|
|
|
4046 args[4] = arg3;
|
|
|
4047 args[5] = arg4;
|
|
|
4048 args[6] = arg5;
|
|
|
4049 args[7] = arg6;
|
|
|
4050 GCPRO1 (args[0]);
|
|
|
4051 gcpro1.nvars = 8;
|
|
|
4052 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4053 }
|
|
|
4054
|
|
|
4055 Lisp_Object
|
|
|
4056 call8 (Lisp_Object fn,
|
|
|
4057 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4058 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4059 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4060 {
|
|
|
4061 /* This function can GC */
|
|
|
4062 struct gcpro gcpro1;
|
|
|
4063 Lisp_Object args[9];
|
|
|
4064 args[0] = fn;
|
|
|
4065 args[1] = arg0;
|
|
|
4066 args[2] = arg1;
|
|
|
4067 args[3] = arg2;
|
|
|
4068 args[4] = arg3;
|
|
|
4069 args[5] = arg4;
|
|
|
4070 args[6] = arg5;
|
|
|
4071 args[7] = arg6;
|
|
|
4072 args[8] = arg7;
|
|
|
4073 GCPRO1 (args[0]);
|
|
|
4074 gcpro1.nvars = 9;
|
|
|
4075 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4076 }
|
|
|
4077
|
|
|
4078 Lisp_Object
|
|
|
4079 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4080 {
|
|
|
4081 int speccount = specpdl_depth ();
|
|
|
4082 Lisp_Object val;
|
|
|
4083
|
|
|
4084 if (current_buffer != buf)
|
|
|
4085 {
|
|
|
4086 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4087 set_buffer_internal (buf);
|
|
|
4088 }
|
|
|
4089 val = call0 (fn);
|
|
|
4090 unbind_to (speccount, Qnil);
|
|
|
4091 return val;
|
|
|
4092 }
|
|
|
4093
|
|
|
4094 Lisp_Object
|
|
|
4095 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4096 Lisp_Object arg0)
|
|
|
4097 {
|
|
|
4098 int speccount = specpdl_depth ();
|
|
|
4099 Lisp_Object val;
|
|
|
4100
|
|
|
4101 if (current_buffer != buf)
|
|
|
4102 {
|
|
|
4103 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4104 set_buffer_internal (buf);
|
|
|
4105 }
|
|
|
4106 val = call1 (fn, arg0);
|
|
|
4107 unbind_to (speccount, Qnil);
|
|
|
4108 return val;
|
|
|
4109 }
|
|
|
4110
|
|
|
4111 Lisp_Object
|
|
|
4112 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4113 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4114 {
|
|
|
4115 int speccount = specpdl_depth ();
|
|
|
4116 Lisp_Object val;
|
|
|
4117
|
|
|
4118 if (current_buffer != buf)
|
|
|
4119 {
|
|
|
4120 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4121 set_buffer_internal (buf);
|
|
|
4122 }
|
|
|
4123 val = call2 (fn, arg0, arg1);
|
|
|
4124 unbind_to (speccount, Qnil);
|
|
|
4125 return val;
|
|
|
4126 }
|
|
|
4127
|
|
|
4128 Lisp_Object
|
|
|
4129 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4130 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4131 {
|
|
|
4132 int speccount = specpdl_depth ();
|
|
|
4133 Lisp_Object val;
|
|
|
4134
|
|
|
4135 if (current_buffer != buf)
|
|
|
4136 {
|
|
|
4137 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4138 set_buffer_internal (buf);
|
|
|
4139 }
|
|
|
4140 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4141 unbind_to (speccount, Qnil);
|
|
|
4142 return val;
|
|
|
4143 }
|
|
|
4144
|
|
|
4145 Lisp_Object
|
|
|
4146 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4147 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4148 Lisp_Object arg3)
|
|
|
4149 {
|
|
|
4150 int speccount = specpdl_depth ();
|
|
|
4151 Lisp_Object val;
|
|
|
4152
|
|
|
4153 if (current_buffer != buf)
|
|
|
4154 {
|
|
|
4155 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4156 set_buffer_internal (buf);
|
|
|
4157 }
|
|
|
4158 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4159 unbind_to (speccount, Qnil);
|
|
|
4160 return val;
|
|
|
4161 }
|
|
|
4162
|
|
|
4163 Lisp_Object
|
|
|
4164 call5_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4165 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4166 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4167 {
|
|
|
4168 int speccount = specpdl_depth ();
|
|
|
4169 Lisp_Object val;
|
|
|
4170
|
|
|
4171 if (current_buffer != buf)
|
|
|
4172 {
|
|
|
4173 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4174 set_buffer_internal (buf);
|
|
|
4175 }
|
|
|
4176 val = call5 (fn, arg0, arg1, arg2, arg3, arg4);
|
|
|
4177 unbind_to (speccount, Qnil);
|
|
|
4178 return val;
|
|
|
4179 }
|
|
|
4180
|
|
|
4181 Lisp_Object
|
|
|
4182 call6_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4183 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4184 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4185 {
|
|
|
4186 int speccount = specpdl_depth ();
|
|
|
4187 Lisp_Object val;
|
|
|
4188
|
|
|
4189 if (current_buffer != buf)
|
|
|
4190 {
|
|
|
4191 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4192 set_buffer_internal (buf);
|
|
|
4193 }
|
|
|
4194 val = call6 (fn, arg0, arg1, arg2, arg3, arg4, arg5);
|
|
|
4195 unbind_to (speccount, Qnil);
|
|
|
4196 return val;
|
|
|
4197 }
|
|
|
4198
|
|
|
4199 Lisp_Object
|
|
|
4200 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4201 {
|
|
|
4202 int speccount = specpdl_depth ();
|
|
|
4203 Lisp_Object val;
|
|
|
4204
|
|
|
4205 if (current_buffer != buf)
|
|
|
4206 {
|
|
|
4207 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4208 set_buffer_internal (buf);
|
|
|
4209 }
|
|
|
4210 val = Feval (form);
|
|
|
4211 unbind_to (speccount, Qnil);
|
|
|
4212 return val;
|
|
|
4213 }
|
|
|
4214
|
|
|
4215
|
|
|
4216 /***** Error-catching front-ends to eval, funcall, apply */
|
|
|
4217
|
|
|
4218 /* Call function fn on no arguments, with condition handler */
|
|
|
4219 Lisp_Object
|
|
|
4220 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4221 {
|
|
|
4222 /* This function can GC */
|
|
|
4223 struct gcpro gcpro1;
|
|
|
4224 Lisp_Object args[2];
|
|
|
4225 args[0] = handler;
|
|
|
4226 args[1] = fn;
|
|
|
4227 GCPRO1 (args[0]);
|
|
|
4228 gcpro1.nvars = 2;
|
|
|
4229 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4230 }
|
|
|
4231
|
|
|
4232 /* Call function fn with argument arg0, with condition handler */
|
|
|
4233 Lisp_Object
|
|
|
4234 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4235 Lisp_Object arg0)
|
|
|
4236 {
|
|
|
4237 /* This function can GC */
|
|
|
4238 struct gcpro gcpro1;
|
|
|
4239 Lisp_Object args[3];
|
|
|
4240 args[0] = handler;
|
|
|
4241 args[1] = fn;
|
|
|
4242 args[2] = arg0;
|
|
|
4243 GCPRO1 (args[0]);
|
|
|
4244 gcpro1.nvars = 3;
|
|
|
4245 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4246 }
|
|
|
4247
|
|
|
4248
|
|
|
4249 /* The following functions provide you with error-trapping versions
|
|
|
4250 of the various front-ends above. They take an additional
|
|
|
4251 "warning_string" argument; if non-zero, a warning with this
|
|
|
4252 string and the actual error that occurred will be displayed
|
|
|
4253 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4254 QUIT is inhibited while these functions are running, and if
|
|
|
4255 an error occurs, Qunbound is returned instead of the normal
|
|
|
4256 return value.
|
|
|
4257 */
|
|
|
4258
|
|
|
4259 /* #### This stuff needs to catch throws as well. We need to
|
|
|
4260 improve internal_catch() so it can take a "catch anything"
|
|
|
4261 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4262
|
|
|
4263 static Lisp_Object
|
|
|
4264 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4265 {
|
|
|
4266 if (!NILP (errordata))
|
|
|
4267 {
|
|
|
4268 Lisp_Object args[2];
|
|
|
4269
|
|
|
4270 if (!NILP (arg))
|
|
|
4271 {
|
|
|
4272 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4273 args[0] = build_string (str);
|
|
|
4274 }
|
|
|
4275 else
|
|
|
4276 args[0] = build_string ("error");
|
|
|
4277 /* #### This should call
|
|
|
4278 (with-output-to-string (display-error errordata))
|
|
|
4279 but that stuff is all in Lisp currently. */
|
|
|
4280 args[1] = errordata;
|
|
|
4281 warn_when_safe_lispobj
|
|
|
4282 (Qerror, Qwarning,
|
|
|
4283 emacs_doprnt_string_lisp ((CONST Bufbyte *) "%s: %s",
|
|
|
4284 Qnil, -1, 2, args));
|
|
|
4285 }
|
|
|
4286 return Qunbound;
|
|
|
4287 }
|
|
|
4288
|
|
|
4289 static Lisp_Object
|
|
|
4290 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4291 {
|
|
|
4292 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4293 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4294 return caught_a_squirmer (errordata, arg);
|
|
|
4295 }
|
|
|
4296
|
|
|
4297 static Lisp_Object
|
|
|
4298 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4299 {
|
|
|
4300 Lisp_Object hook = Fcar (arg);
|
|
|
4301 arg = Fcdr (arg);
|
|
|
4302 /* Clear out the hook. */
|
|
|
4303 Fset (hook, Qnil);
|
|
|
4304 return caught_a_squirmer (errordata, arg);
|
|
|
4305 }
|
|
|
4306
|
|
|
4307 static Lisp_Object
|
|
|
4308 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4309 Lisp_Object arg)
|
|
|
4310 {
|
|
|
4311 Lisp_Object hook = Fcar (arg);
|
|
|
4312 arg = Fcdr (arg);
|
|
|
4313 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4314 /* Clear out the hook. */
|
|
|
4315 Fset (hook, Qnil);
|
|
|
4316 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4317 }
|
|
|
4318
|
|
|
4319 static Lisp_Object
|
|
|
4320 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4321 {
|
|
|
4322 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4323 }
|
|
|
4324
|
|
|
4325 Lisp_Object
|
|
|
4326 eval_in_buffer_trapping_errors (CONST char *warning_string,
|
|
|
4327 struct buffer *buf, Lisp_Object form)
|
|
|
4328 {
|
|
|
4329 int speccount = specpdl_depth ();
|
|
|
4330 Lisp_Object tem;
|
|
|
4331 Lisp_Object buffer = Qnil;
|
|
|
4332 Lisp_Object cons;
|
|
|
4333 Lisp_Object opaque;
|
|
|
4334 struct gcpro gcpro1, gcpro2;
|
|
|
4335
|
|
|
4336 XSETBUFFER (buffer, buf);
|
|
|
4337
|
|
|
4338 specbind (Qinhibit_quit, Qt);
|
|
|
4339 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4340
|
|
|
4341 cons = noseeum_cons (buffer, form);
|
|
|
4342 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4343 GCPRO2 (cons, opaque);
|
|
|
4344 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4345 tem = condition_case_1 (Qerror,
|
|
|
4346 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4347 caught_a_squirmer, opaque);
|
|
|
4348 free_cons (XCONS (cons));
|
|
|
4349 if (OPAQUEP (opaque))
|
|
|
4350 free_opaque_ptr (opaque);
|
|
|
4351 UNGCPRO;
|
|
|
4352
|
|
|
4353 /* gc_currently_forbidden = 0; */
|
|
|
4354 return unbind_to (speccount, tem);
|
|
|
4355 }
|
|
|
4356
|
|
|
4357 static Lisp_Object
|
|
|
4358 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4359 {
|
|
|
4360 /* This function can GC */
|
|
|
4361 run_hook (hook_symbol);
|
|
|
4362 return Qnil;
|
|
|
4363 }
|
|
|
4364
|
|
|
4365 Lisp_Object
|
|
|
4366 run_hook_trapping_errors (CONST char *warning_string, Lisp_Object hook_symbol)
|
|
|
4367 {
|
|
|
4368 int speccount = specpdl_depth ();
|
|
|
4369 Lisp_Object tem;
|
|
|
4370 Lisp_Object opaque;
|
|
|
4371 struct gcpro gcpro1;
|
|
|
4372
|
|
|
4373 if (!initialized || preparing_for_armageddon)
|
|
|
4374 return Qnil;
|
|
|
4375 tem = find_symbol_value (hook_symbol);
|
|
|
4376 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4377 return Qnil;
|
|
|
4378
|
|
|
4379 specbind (Qinhibit_quit, Qt);
|
|
|
4380
|
|
|
4381 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4382 GCPRO1 (opaque);
|
|
|
4383 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4384 tem = condition_case_1 (Qerror,
|
|
|
4385 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4386 caught_a_squirmer, opaque);
|
|
|
4387 if (OPAQUEP (opaque))
|
|
|
4388 free_opaque_ptr (opaque);
|
|
|
4389 UNGCPRO;
|
|
|
4390
|
|
|
4391 return unbind_to (speccount, tem);
|
|
|
4392 }
|
|
|
4393
|
|
|
4394 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4395 if an error occurs. */
|
|
|
4396
|
|
|
4397 Lisp_Object
|
|
|
4398 safe_run_hook_trapping_errors (CONST char *warning_string,
|
|
|
4399 Lisp_Object hook_symbol,
|
|
|
4400 int allow_quit)
|
|
|
4401 {
|
|
|
4402 int speccount = specpdl_depth ();
|
|
|
4403 Lisp_Object tem;
|
|
|
4404 Lisp_Object cons = Qnil;
|
|
|
4405 struct gcpro gcpro1;
|
|
|
4406
|
|
|
4407 if (!initialized || preparing_for_armageddon)
|
|
|
4408 return Qnil;
|
|
|
4409 tem = find_symbol_value (hook_symbol);
|
|
|
4410 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4411 return Qnil;
|
|
|
4412
|
|
|
4413 if (!allow_quit)
|
|
|
4414 specbind (Qinhibit_quit, Qt);
|
|
|
4415
|
|
|
4416 cons = noseeum_cons (hook_symbol,
|
|
|
4417 warning_string ? make_opaque_ptr (warning_string)
|
|
|
4418 : Qnil);
|
|
|
4419 GCPRO1 (cons);
|
|
|
4420 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4421 tem = condition_case_1 (Qerror,
|
|
|
4422 catch_them_squirmers_run_hook,
|
|
|
4423 hook_symbol,
|
|
|
4424 allow_quit ?
|
|
|
4425 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4426 safe_run_hook_caught_a_squirmer,
|
|
|
4427 cons);
|
|
|
4428 if (OPAQUEP (XCDR (cons)))
|
|
|
4429 free_opaque_ptr (XCDR (cons));
|
|
|
4430 free_cons (XCONS (cons));
|
|
|
4431 UNGCPRO;
|
|
|
4432
|
|
|
4433 return unbind_to (speccount, tem);
|
|
|
4434 }
|
|
|
4435
|
|
|
4436 static Lisp_Object
|
|
|
4437 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4438 {
|
|
|
4439 /* This function can GC */
|
|
|
4440 return call0 (function);
|
|
|
4441 }
|
|
|
4442
|
|
|
4443 Lisp_Object
|
|
|
4444 call0_trapping_errors (CONST char *warning_string, Lisp_Object function)
|
|
|
4445 {
|
|
|
4446 int speccount = specpdl_depth ();
|
|
|
4447 Lisp_Object tem;
|
|
|
4448 Lisp_Object opaque = Qnil;
|
|
|
4449 struct gcpro gcpro1, gcpro2;
|
|
|
4450
|
|
|
4451 if (SYMBOLP (function))
|
|
|
4452 {
|
|
|
4453 tem = XSYMBOL (function)->function;
|
|
|
4454 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4455 return (Qnil);
|
|
|
4456 }
|
|
|
4457
|
|
|
4458 GCPRO2 (opaque, function);
|
|
|
4459 specbind (Qinhibit_quit, Qt);
|
|
|
4460 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4461
|
|
|
4462 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4463 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4464 tem = condition_case_1 (Qerror,
|
|
|
4465 catch_them_squirmers_call0, function,
|
|
|
4466 caught_a_squirmer, opaque);
|
|
|
4467 if (OPAQUEP (opaque))
|
|
|
4468 free_opaque_ptr (opaque);
|
|
|
4469 UNGCPRO;
|
|
|
4470
|
|
|
4471 /* gc_currently_forbidden = 0; */
|
|
|
4472 return unbind_to (speccount, tem);
|
|
|
4473 }
|
|
|
4474
|
|
|
4475 static Lisp_Object
|
|
|
4476 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4477 {
|
|
|
4478 /* This function can GC */
|
|
|
4479 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4480 }
|
|
|
4481
|
|
|
4482 static Lisp_Object
|
|
|
4483 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4484 {
|
|
|
4485 /* This function can GC */
|
|
|
4486 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4487 }
|
|
|
4488
|
|
|
4489 Lisp_Object
|
|
|
4490 call1_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4491 Lisp_Object object)
|
|
|
4492 {
|
|
|
4493 int speccount = specpdl_depth ();
|
|
|
4494 Lisp_Object tem;
|
|
|
4495 Lisp_Object cons = Qnil;
|
|
|
4496 Lisp_Object opaque = Qnil;
|
|
|
4497 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4498
|
|
|
4499 if (SYMBOLP (function))
|
|
|
4500 {
|
|
|
4501 tem = XSYMBOL (function)->function;
|
|
|
4502 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4503 return (Qnil);
|
|
|
4504 }
|
|
|
4505
|
|
|
4506 GCPRO4 (cons, opaque, function, object);
|
|
|
4507
|
|
|
4508 specbind (Qinhibit_quit, Qt);
|
|
|
4509 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4510
|
|
|
4511 cons = noseeum_cons (function, object);
|
|
|
4512 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4513 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4514 tem = condition_case_1 (Qerror,
|
|
|
4515 catch_them_squirmers_call1, cons,
|
|
|
4516 caught_a_squirmer, opaque);
|
|
|
4517 if (OPAQUEP (opaque))
|
|
|
4518 free_opaque_ptr (opaque);
|
|
|
4519 free_cons (XCONS (cons));
|
|
|
4520 UNGCPRO;
|
|
|
4521
|
|
|
4522 /* gc_currently_forbidden = 0; */
|
|
|
4523 return unbind_to (speccount, tem);
|
|
|
4524 }
|
|
|
4525
|
|
|
4526 Lisp_Object
|
|
|
4527 call2_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4528 Lisp_Object object1, Lisp_Object object2)
|
|
|
4529 {
|
|
|
4530 int speccount = specpdl_depth ();
|
|
|
4531 Lisp_Object tem;
|
|
|
4532 Lisp_Object cons = Qnil;
|
|
|
4533 Lisp_Object opaque = Qnil;
|
|
|
4534 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4535
|
|
|
4536 if (SYMBOLP (function))
|
|
|
4537 {
|
|
|
4538 tem = XSYMBOL (function)->function;
|
|
|
4539 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4540 return (Qnil);
|
|
|
4541 }
|
|
|
4542
|
|
|
4543 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4544 specbind (Qinhibit_quit, Qt);
|
|
|
4545 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4546
|
|
|
4547 cons = list3 (function, object1, object2);
|
|
|
4548 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4549 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4550 tem = condition_case_1 (Qerror,
|
|
|
4551 catch_them_squirmers_call2, cons,
|
|
|
4552 caught_a_squirmer, opaque);
|
|
|
4553 if (OPAQUEP (opaque))
|
|
|
4554 free_opaque_ptr (opaque);
|
|
|
4555 free_list (cons);
|
|
|
4556 UNGCPRO;
|
|
|
4557
|
|
|
4558 /* gc_currently_forbidden = 0; */
|
|
|
4559 return unbind_to (speccount, tem);
|
|
|
4560 }
|
|
|
4561
|
|
|
4562
|
|
|
4563 /**********************************************************************/
|
|
|
4564 /* The special binding stack */
|
|
|
4565 /**********************************************************************/
|
|
|
4566
|
|
2
|
4567 #define min_max_specpdl_size 400
|
|
|
4568
|
|
0
|
4569 static void
|
|
|
4570 grow_specpdl (void)
|
|
|
4571 {
|
|
|
4572 if (specpdl_size >= max_specpdl_size)
|
|
|
4573 {
|
|
2
|
4574 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4575 max_specpdl_size = min_max_specpdl_size;
|
|
0
|
4576 if (specpdl_size >= max_specpdl_size)
|
|
|
4577 {
|
|
|
4578 if (!NILP (Vdebug_on_error) || !NILP (Vdebug_on_signal))
|
|
|
4579 /* Leave room for some specpdl in the debugger. */
|
|
|
4580 max_specpdl_size = specpdl_size + 100;
|
|
|
4581 continuable_error
|
|
|
4582 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4583 }
|
|
|
4584 }
|
|
|
4585 specpdl_size *= 2;
|
|
|
4586 if (specpdl_size > max_specpdl_size)
|
|
|
4587 specpdl_size = max_specpdl_size;
|
|
|
4588 specpdl = ((struct specbinding *)
|
|
|
4589 xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)));
|
|
|
4590 specpdl_ptr = specpdl + specpdl_depth_counter;
|
|
|
4591 }
|
|
|
4592
|
|
|
4593
|
|
|
4594 /* Handle unbinding buffer-local variables */
|
|
|
4595 static Lisp_Object
|
|
|
4596 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4597 {
|
|
|
4598 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4599 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4600 struct Lisp_Cons *victim = XCONS (ovalue);
|
|
|
4601 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4602 ovalue = victim->cdr;
|
|
|
4603
|
|
|
4604 free_cons (victim);
|
|
|
4605
|
|
|
4606 if (NILP (buf))
|
|
|
4607 {
|
|
|
4608 /* Deleted buffer -- do nothing */
|
|
|
4609 }
|
|
|
4610 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4611 {
|
|
|
4612 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4613 * (kill-local-variable can do this.)
|
|
|
4614 * Do nothing in this case.
|
|
|
4615 */
|
|
|
4616 }
|
|
|
4617 else if (EQ (buf, current))
|
|
|
4618 Fset (symbol, ovalue);
|
|
|
4619 else
|
|
|
4620 {
|
|
|
4621 /* Urk! Somebody switched buffers */
|
|
|
4622 struct gcpro gcpro1;
|
|
|
4623 GCPRO1 (current);
|
|
|
4624 Fset_buffer (buf);
|
|
|
4625 Fset (symbol, ovalue);
|
|
|
4626 Fset_buffer (current);
|
|
|
4627 UNGCPRO;
|
|
|
4628 }
|
|
|
4629 return (symbol);
|
|
|
4630 }
|
|
|
4631
|
|
|
4632 static Lisp_Object
|
|
|
4633 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4634 {
|
|
|
4635 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4636 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4637
|
|
|
4638 buffer = get_buffer (buffer, 0);
|
|
|
4639 if (NILP (buffer))
|
|
|
4640 {
|
|
|
4641 /* Deleted buffer -- do nothing */
|
|
|
4642 }
|
|
|
4643 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4644 {
|
|
|
4645 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4646 * (kill-local-variable can do this.)
|
|
|
4647 * Do nothing in this case.
|
|
|
4648 */
|
|
|
4649 }
|
|
|
4650 else if (EQ (buffer, current))
|
|
|
4651 Fkill_local_variable (symbol);
|
|
|
4652 else
|
|
|
4653 {
|
|
|
4654 /* Urk! Somebody switched buffers */
|
|
|
4655 struct gcpro gcpro1;
|
|
|
4656 GCPRO1 (current);
|
|
|
4657 Fset_buffer (buffer);
|
|
|
4658 Fkill_local_variable (symbol);
|
|
|
4659 Fset_buffer (current);
|
|
|
4660 UNGCPRO;
|
|
|
4661 }
|
|
|
4662 return (symbol);
|
|
|
4663 }
|
|
|
4664
|
|
|
4665
|
|
|
4666 /* Don't want to include buffer.h just for this */
|
|
|
4667 extern struct buffer *current_buffer;
|
|
|
4668
|
|
|
4669 void
|
|
|
4670 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4671 {
|
|
|
4672 int buffer_local;
|
|
|
4673
|
|
|
4674 CHECK_SYMBOL (symbol);
|
|
|
4675
|
|
|
4676 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4677 grow_specpdl ();
|
|
|
4678
|
|
|
4679 buffer_local = symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4680 if (buffer_local == 0)
|
|
|
4681 {
|
|
|
4682 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4683 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4684 }
|
|
|
4685 else if (buffer_local > 0)
|
|
|
4686 {
|
|
|
4687 /* Already buffer-local */
|
|
|
4688 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4689 find_symbol_value (symbol));
|
|
|
4690 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4691 }
|
|
|
4692 else
|
|
|
4693 {
|
|
|
4694 /* About to become buffer-local */
|
|
|
4695 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4696 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4697 }
|
|
|
4698
|
|
|
4699 specpdl_ptr->symbol = symbol;
|
|
|
4700 specpdl_ptr++;
|
|
|
4701 specpdl_depth_counter++;
|
|
|
4702
|
|
|
4703 Fset (symbol, value);
|
|
|
4704 }
|
|
|
4705
|
|
|
4706 void
|
|
|
4707 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4708 Lisp_Object arg)
|
|
|
4709 {
|
|
|
4710 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4711 grow_specpdl ();
|
|
|
4712 specpdl_ptr->func = function;
|
|
|
4713 specpdl_ptr->symbol = Qnil;
|
|
|
4714 specpdl_ptr->old_value = arg;
|
|
|
4715 specpdl_ptr++;
|
|
|
4716 specpdl_depth_counter++;
|
|
|
4717 }
|
|
|
4718
|
|
|
4719 extern int check_sigio (void);
|
|
|
4720
|
|
|
4721 Lisp_Object
|
|
|
4722 unbind_to (int count, Lisp_Object value)
|
|
|
4723 {
|
|
|
4724 int quitf;
|
|
|
4725 struct gcpro gcpro1;
|
|
|
4726
|
|
|
4727 GCPRO1 (value);
|
|
|
4728
|
|
|
4729 check_quit (); /* make Vquit_flag accurate */
|
|
|
4730 quitf = !NILP (Vquit_flag);
|
|
|
4731 Vquit_flag = Qnil;
|
|
|
4732
|
|
|
4733 while (specpdl_depth_counter != count)
|
|
|
4734 {
|
|
|
4735 Lisp_Object ovalue;
|
|
|
4736 --specpdl_ptr;
|
|
|
4737 --specpdl_depth_counter;
|
|
|
4738
|
|
|
4739 ovalue = specpdl_ptr->old_value;
|
|
|
4740 if (specpdl_ptr->func != 0)
|
|
|
4741 /* An unwind-protect */
|
|
|
4742 (*specpdl_ptr->func) (ovalue);
|
|
|
4743 else
|
|
|
4744 Fset (specpdl_ptr->symbol, ovalue);
|
|
|
4745
|
|
|
4746 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4747 /* There should never be anything here for us to remove.
|
|
|
4748 If so, it indicates a logic error in Emacs. Catches
|
|
|
4749 should get removed when a throw or signal occurs, or
|
|
|
4750 when a catch or condition-case exits normally. But
|
|
|
4751 it's too dangerous to just remove this code. --ben */
|
|
|
4752
|
|
|
4753 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4754 Braino on mly's part? */
|
|
|
4755 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4756 that catch can't possibly still be valid. */
|
|
|
4757 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4758 {
|
|
|
4759 catchlist = catchlist->next;
|
|
|
4760 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4761 }
|
|
|
4762 #endif
|
|
|
4763 }
|
|
|
4764 if (quitf)
|
|
|
4765 Vquit_flag = Qt;
|
|
|
4766
|
|
|
4767 UNGCPRO;
|
|
|
4768
|
|
|
4769 return (value);
|
|
|
4770 }
|
|
|
4771
|
|
|
4772
|
|
|
4773 int
|
|
|
4774 specpdl_depth (void)
|
|
|
4775 {
|
|
|
4776 return (specpdl_depth_counter);
|
|
|
4777 }
|
|
|
4778
|
|
|
4779
|
|
|
4780 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4781 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4782
|
|
|
4783 Lisp_Object
|
|
|
4784 top_level_value (Lisp_Object symbol)
|
|
|
4785 {
|
|
|
4786 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4787
|
|
|
4788 CHECK_SYMBOL (symbol);
|
|
|
4789 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4790 {
|
|
|
4791 if (EQ (ptr->symbol, symbol))
|
|
|
4792 return ptr->old_value;
|
|
|
4793 }
|
|
|
4794 return XSYMBOL (symbol)->value;
|
|
|
4795 }
|
|
|
4796
|
|
|
4797 #if 0
|
|
|
4798
|
|
|
4799 Lisp_Object
|
|
|
4800 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4801 {
|
|
|
4802 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4803
|
|
|
4804 CHECK_SYMBOL (symbol);
|
|
|
4805 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4806 {
|
|
|
4807 if (EQ (ptr->symbol, symbol))
|
|
|
4808 {
|
|
|
4809 ptr->old_value = newval;
|
|
|
4810 return newval;
|
|
|
4811 }
|
|
|
4812 }
|
|
|
4813 return Fset (symbol, newval);
|
|
|
4814 }
|
|
|
4815
|
|
|
4816 #endif /* 0 */
|
|
|
4817
|
|
|
4818
|
|
|
4819 /**********************************************************************/
|
|
|
4820 /* Backtraces */
|
|
|
4821 /**********************************************************************/
|
|
|
4822
|
|
20
|
4823 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4824 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4825 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4826 */
|
|
|
4827 (level, flag))
|
|
0
|
4828 {
|
|
|
4829 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4830 REGISTER int i;
|
|
|
4831
|
|
|
4832 CHECK_INT (level);
|
|
|
4833
|
|
|
4834 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4835 {
|
|
|
4836 backlist = backlist->next;
|
|
|
4837 }
|
|
|
4838
|
|
|
4839 if (backlist)
|
|
|
4840 backlist->debug_on_exit = !NILP (flag);
|
|
|
4841
|
|
|
4842 return flag;
|
|
|
4843 }
|
|
|
4844
|
|
|
4845 static void
|
|
|
4846 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4847 {
|
|
|
4848 int printing_bindings = 0;
|
|
|
4849
|
|
|
4850 for (; speccount > speclimit; speccount--)
|
|
|
4851 {
|
|
|
4852 if (specpdl[speccount - 1].func == 0
|
|
|
4853 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4854 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4855 {
|
|
|
4856 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4857 stream);
|
|
|
4858 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4859 printing_bindings = 1;
|
|
|
4860 }
|
|
|
4861 else
|
|
|
4862 {
|
|
|
4863 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4864 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4865 printing_bindings = 0;
|
|
|
4866 }
|
|
|
4867 }
|
|
|
4868 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4869 }
|
|
|
4870
|
|
20
|
4871 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4872 Print a trace of Lisp function calls currently active.
|
|
|
4873 Option arg STREAM specifies the output stream to send the backtrace to,
|
|
|
4874 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4875 DETAILED means show places where currently active variable bindings,
|
|
|
4876 catches, condition-cases, and unwind-protects were made as well as
|
|
|
4877 function calls.
|
|
20
|
4878 */
|
|
|
4879 (stream, detailed))
|
|
0
|
4880 {
|
|
|
4881 struct backtrace *backlist = backtrace_list;
|
|
|
4882 struct catchtag *catches = catchlist;
|
|
|
4883 int speccount = specpdl_depth_counter;
|
|
|
4884
|
|
|
4885 int old_nl = print_escape_newlines;
|
|
|
4886 int old_pr = print_readably;
|
|
|
4887 Lisp_Object old_level = Vprint_level;
|
|
|
4888 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4889 struct gcpro gcpro1, gcpro2;
|
|
|
4890
|
|
|
4891 /* We can't allow quits in here because that could cause the values
|
|
|
4892 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4893 Normally we would use a record_unwind_protect but that would
|
|
|
4894 screw up the functioning of this function. */
|
|
|
4895 Vinhibit_quit = Qt;
|
|
|
4896
|
|
|
4897 entering_debugger = 0;
|
|
|
4898
|
|
|
4899 Vprint_level = make_int (3);
|
|
|
4900 print_readably = 0;
|
|
|
4901 print_escape_newlines = 1;
|
|
|
4902
|
|
|
4903 GCPRO2 (stream, old_level);
|
|
|
4904
|
|
|
4905 if (NILP (stream))
|
|
|
4906 stream = Vstandard_output;
|
|
|
4907 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4908 stream = Fselected_frame (Qnil);
|
|
|
4909
|
|
|
4910 for (;;)
|
|
|
4911 {
|
|
|
4912 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4913 {
|
|
|
4914 int catchpdl = catches->pdlcount;
|
|
|
4915 if (specpdl[catchpdl].func == condition_case_unwind
|
|
|
4916 && speccount > catchpdl)
|
|
|
4917 /* This is a condition-case catchpoint */
|
|
|
4918 catchpdl = catchpdl + 1;
|
|
|
4919
|
|
|
4920 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4921
|
|
|
4922 speccount = catches->pdlcount;
|
|
|
4923 if (catchpdl == speccount)
|
|
|
4924 {
|
|
|
4925 write_c_string (" # (catch ", stream);
|
|
|
4926 Fprin1 (catches->tag, stream);
|
|
|
4927 write_c_string (" ...)\n", stream);
|
|
|
4928 }
|
|
|
4929 else
|
|
|
4930 {
|
|
|
4931 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4932 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4933 write_c_string (")\n", stream);
|
|
|
4934 }
|
|
|
4935 catches = catches->next;
|
|
|
4936 }
|
|
|
4937 else if (!backlist)
|
|
|
4938 break;
|
|
|
4939 else
|
|
|
4940 {
|
|
|
4941 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4942 {
|
|
|
4943 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4944 speccount = backlist->pdlcount;
|
|
|
4945 }
|
|
|
4946 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4947 stream);
|
|
|
4948 if (backlist->nargs == UNEVALLED)
|
|
|
4949 {
|
|
|
4950 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4951 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4952 }
|
|
|
4953 else
|
|
|
4954 {
|
|
|
4955 Lisp_Object tem = *backlist->function;
|
|
|
4956 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4957 write_c_string ("(", stream);
|
|
|
4958 if (backlist->nargs == MANY)
|
|
|
4959 {
|
|
|
4960 int i;
|
|
|
4961 Lisp_Object tail = Qnil;
|
|
|
4962 struct gcpro ngcpro1;
|
|
|
4963
|
|
|
4964 NGCPRO1 (tail);
|
|
|
4965 for (tail = *backlist->args, i = 0;
|
|
|
4966 !NILP (tail);
|
|
|
4967 tail = Fcdr (tail), i++)
|
|
|
4968 {
|
|
|
4969 if (i != 0) write_c_string (" ", stream);
|
|
|
4970 Fprin1 (Fcar (tail), stream);
|
|
|
4971 }
|
|
|
4972 NUNGCPRO;
|
|
|
4973 }
|
|
|
4974 else
|
|
|
4975 {
|
|
|
4976 int i;
|
|
|
4977 for (i = 0; i < backlist->nargs; i++)
|
|
|
4978 {
|
|
|
4979 if (i != 0) write_c_string (" ", stream);
|
|
|
4980 Fprin1 (backlist->args[i], stream);
|
|
|
4981 }
|
|
|
4982 }
|
|
|
4983 }
|
|
|
4984 write_c_string (")\n", stream);
|
|
|
4985 backlist = backlist->next;
|
|
|
4986 }
|
|
|
4987 }
|
|
|
4988 Vprint_level = old_level;
|
|
|
4989 print_readably = old_pr;
|
|
|
4990 print_escape_newlines = old_nl;
|
|
|
4991 UNGCPRO;
|
|
|
4992 Vinhibit_quit = oiq;
|
|
|
4993 return Qnil;
|
|
|
4994 }
|
|
|
4995
|
|
|
4996
|
|
20
|
4997 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
4998 Return the function and arguments N frames up from current execution point.
|
|
|
4999 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
5000 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
5001 If that frame has evaluated its arguments and called its function already,
|
|
|
5002 the value is (t FUNCTION ARG-VALUES...).
|
|
|
5003 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
5004 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
5005 or a lambda expression for macro calls.
|
|
|
5006 If N is more than the number of frames, the value is nil.
|
|
20
|
5007 */
|
|
|
5008 (nframes))
|
|
0
|
5009 {
|
|
|
5010 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5011 REGISTER int i;
|
|
|
5012 Lisp_Object tem;
|
|
|
5013
|
|
|
5014 CHECK_NATNUM (nframes);
|
|
|
5015
|
|
|
5016 /* Find the frame requested. */
|
|
|
5017 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
5018 backlist = backlist->next;
|
|
|
5019
|
|
|
5020 if (!backlist)
|
|
|
5021 return Qnil;
|
|
|
5022 if (backlist->nargs == UNEVALLED)
|
|
|
5023 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
5024 else
|
|
|
5025 {
|
|
|
5026 if (backlist->nargs == MANY)
|
|
|
5027 tem = *backlist->args;
|
|
|
5028 else
|
|
|
5029 tem = Flist (backlist->nargs, backlist->args);
|
|
|
5030
|
|
|
5031 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
5032 }
|
|
|
5033 }
|
|
|
5034
|
|
|
5035
|
|
|
5036 /**********************************************************************/
|
|
|
5037 /* Warnings */
|
|
|
5038 /**********************************************************************/
|
|
|
5039
|
|
|
5040 void
|
|
|
5041 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
5042 Lisp_Object obj)
|
|
|
5043 {
|
|
|
5044 obj = list1 (list3 (class, level, obj));
|
|
|
5045 if (NILP (Vpending_warnings))
|
|
|
5046 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
5047 else
|
|
|
5048 {
|
|
|
5049 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
5050 Vpending_warnings_tail = obj;
|
|
|
5051 }
|
|
|
5052 }
|
|
|
5053
|
|
|
5054 /* #### This should probably accept Lisp objects; but then we have
|
|
|
5055 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
5056
|
|
|
5057 An alternative approach is to just pass some non-string type of
|
|
|
5058 Lisp Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
5059 automatically be called when it is safe to do so. */
|
|
|
5060
|
|
|
5061 void
|
|
|
5062 warn_when_safe (Lisp_Object class, Lisp_Object level, CONST char *fmt, ...)
|
|
|
5063 {
|
|
|
5064 Lisp_Object obj;
|
|
|
5065 va_list args;
|
|
|
5066
|
|
|
5067 va_start (args, fmt);
|
|
|
5068 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt),
|
|
|
5069 Qnil, -1, args);
|
|
|
5070 va_end (args);
|
|
|
5071
|
|
|
5072 warn_when_safe_lispobj (class, level, obj);
|
|
|
5073 }
|
|
|
5074
|
|
|
5075
|
|
|
5076
|
|
|
5077
|
|
|
5078 /**********************************************************************/
|
|
|
5079 /* Initialization */
|
|
|
5080 /**********************************************************************/
|
|
|
5081
|
|
|
5082 void
|
|
|
5083 syms_of_eval (void)
|
|
|
5084 {
|
|
|
5085 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5086 defsymbol (&Qautoload, "autoload");
|
|
|
5087 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5088 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5089 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5090 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5091 defsymbol (&Qdebugger, "debugger");
|
|
|
5092 defsymbol (&Qmacro, "macro");
|
|
|
5093 defsymbol (&Qand_rest, "&rest");
|
|
|
5094 defsymbol (&Qand_optional, "&optional");
|
|
|
5095 /* Note that the process code also uses Qexit */
|
|
|
5096 defsymbol (&Qexit, "exit");
|
|
|
5097 defsymbol (&Qsetq, "setq");
|
|
|
5098 defsymbol (&Qinteractive, "interactive");
|
|
|
5099 defsymbol (&Qcommandp, "commandp");
|
|
|
5100 defsymbol (&Qdefun, "defun");
|
|
|
5101 defsymbol (&Qprogn, "progn");
|
|
|
5102 defsymbol (&Qvalues, "values");
|
|
|
5103 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5104 defsymbol (&Qrun_hooks, "run-hooks");
|
|
|
5105
|
|
20
|
5106 DEFSUBR (For);
|
|
|
5107 DEFSUBR (Fand);
|
|
|
5108 DEFSUBR (Fif);
|
|
|
5109 DEFSUBR (Fcond);
|
|
|
5110 DEFSUBR (Fprogn);
|
|
|
5111 DEFSUBR (Fprog1);
|
|
|
5112 DEFSUBR (Fprog2);
|
|
|
5113 DEFSUBR (Fsetq);
|
|
|
5114 DEFSUBR (Fquote);
|
|
|
5115 DEFSUBR (Ffunction);
|
|
|
5116 DEFSUBR (Fdefun);
|
|
|
5117 DEFSUBR (Fdefmacro);
|
|
|
5118 DEFSUBR (Fdefvar);
|
|
|
5119 DEFSUBR (Fdefconst);
|
|
|
5120 DEFSUBR (Fuser_variable_p);
|
|
|
5121 DEFSUBR (Flet);
|
|
|
5122 DEFSUBR (FletX);
|
|
|
5123 DEFSUBR (Fwhile);
|
|
|
5124 DEFSUBR (Fmacroexpand_internal);
|
|
|
5125 DEFSUBR (Fcatch);
|
|
|
5126 DEFSUBR (Fthrow);
|
|
|
5127 DEFSUBR (Funwind_protect);
|
|
|
5128 DEFSUBR (Fcondition_case);
|
|
|
5129 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5130 DEFSUBR (Fsignal);
|
|
|
5131 DEFSUBR (Finteractive_p);
|
|
149
|
5132 DEFSUBR (Fstrerror);
|
|
20
|
5133 DEFSUBR (Fcommandp);
|
|
|
5134 DEFSUBR (Fcommand_execute);
|
|
|
5135 DEFSUBR (Fautoload);
|
|
|
5136 DEFSUBR (Feval);
|
|
|
5137 DEFSUBR (Fapply);
|
|
|
5138 DEFSUBR (Ffuncall);
|
|
|
5139 DEFSUBR (Ffunction_min_args);
|
|
|
5140 DEFSUBR (Ffunction_max_args);
|
|
|
5141 DEFSUBR (Frun_hooks);
|
|
|
5142 DEFSUBR (Frun_hook_with_args);
|
|
|
5143 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5144 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5145 DEFSUBR (Ffetch_bytecode);
|
|
|
5146 DEFSUBR (Fbacktrace_debug);
|
|
|
5147 DEFSUBR (Fbacktrace);
|
|
|
5148 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5149 }
|
|
|
5150
|
|
|
5151 void
|
|
|
5152 reinit_eval (void)
|
|
|
5153 {
|
|
|
5154 specpdl_ptr = specpdl;
|
|
|
5155 specpdl_depth_counter = 0;
|
|
|
5156 catchlist = 0;
|
|
|
5157 Vcondition_handlers = Qnil;
|
|
|
5158 backtrace_list = 0;
|
|
|
5159 Vquit_flag = Qnil;
|
|
|
5160 debug_on_next_call = 0;
|
|
|
5161 lisp_eval_depth = 0;
|
|
|
5162 entering_debugger = 0;
|
|
|
5163 }
|
|
|
5164
|
|
|
5165 void
|
|
|
5166 vars_of_eval (void)
|
|
|
5167 {
|
|
|
5168 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5169 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5170 */ );
|
|
|
5171
|
|
|
5172 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5173 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5174 This limit is to catch infinite recursions for you before they cause
|
|
|
5175 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5176 You can safely make it considerably larger than its default value,
|
|
|
5177 if that proves inconveniently small.
|
|
|
5178 */ );
|
|
|
5179
|
|
|
5180 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5181 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5182 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5183 */ );
|
|
|
5184 Vquit_flag = Qnil;
|
|
|
5185
|
|
|
5186 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5187 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5188 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5189 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5190 To prevent this happening, set `quit-flag' to nil
|
|
|
5191 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5192 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5193 an X frame.
|
|
|
5194 */ );
|
|
|
5195 Vinhibit_quit = Qnil;
|
|
|
5196
|
|
|
5197 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5198 *Non-nil means automatically display a backtrace buffer
|
|
|
5199 after any error that is not handled by a `condition-case'.
|
|
|
5200 If the value is a list, an error only means to display a backtrace
|
|
|
5201 if one of its condition symbols appears in the list.
|
|
|
5202 See also variable `stack-trace-on-signal'.
|
|
|
5203 */ );
|
|
|
5204 Vstack_trace_on_error = Qnil;
|
|
|
5205
|
|
|
5206 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5207 *Non-nil means automatically display a backtrace buffer
|
|
|
5208 after any error that is signalled, whether or not it is handled by
|
|
|
5209 a `condition-case'.
|
|
|
5210 If the value is a list, an error only means to display a backtrace
|
|
|
5211 if one of its condition symbols appears in the list.
|
|
|
5212 See also variable `stack-trace-on-error'.
|
|
|
5213 */ );
|
|
|
5214 Vstack_trace_on_signal = Qnil;
|
|
|
5215
|
|
163
|
5216 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5217 *List of errors for which the debugger should not be called.
|
|
|
5218 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5219 If any element applies to a given error, that error skips the debugger
|
|
|
5220 and just returns to top level.
|
|
|
5221 This overrides the variable `debug-on-error'.
|
|
|
5222 It does not apply to errors handled by `condition-case'.
|
|
|
5223 */ );
|
|
|
5224 Vdebug_ignored_errors = Qnil;
|
|
|
5225
|
|
0
|
5226 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5227 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5228 The debugger will not be entered if the error is handled by
|
|
|
5229 a `condition-case'.
|
|
|
5230 If the value is a list, an error only means to enter the debugger
|
|
|
5231 if one of its condition symbols appears in the list.
|
|
|
5232 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5233 */ );
|
|
|
5234 Vdebug_on_error = Qnil;
|
|
|
5235
|
|
|
5236 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5237 *Non-nil means enter debugger if an error is signalled.
|
|
|
5238 The debugger will be entered whether or not the error is handled by
|
|
|
5239 a `condition-case'.
|
|
|
5240 If the value is a list, an error only means to enter the debugger
|
|
|
5241 if one of its condition symbols appears in the list.
|
|
|
5242 See also variable `debug-on-quit'.
|
|
|
5243 */ );
|
|
|
5244 Vdebug_on_signal = Qnil;
|
|
|
5245
|
|
|
5246 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5247 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5248 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5249 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5250 control-shift-G to signal a critical quit.
|
|
|
5251 */ );
|
|
|
5252 debug_on_quit = 0;
|
|
|
5253
|
|
|
5254 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5255 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5256 */ );
|
|
|
5257
|
|
|
5258 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5259 Function to call to invoke debugger.
|
|
|
5260 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5261 this function's value will be returned instead of that.
|
|
|
5262 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5263 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5264 If due to `eval' entry, one arg, t.
|
|
|
5265 */ );
|
|
|
5266 Vdebugger = Qnil;
|
|
|
5267
|
|
|
5268 preparing_for_armageddon = 0;
|
|
|
5269
|
|
|
5270 staticpro (&Vpending_warnings);
|
|
|
5271 Vpending_warnings = Qnil;
|
|
|
5272 Vpending_warnings_tail = Qnil; /* no need to protect this */
|
|
|
5273
|
|
|
5274 in_warnings = 0;
|
|
|
5275
|
|
|
5276 staticpro (&Vautoload_queue);
|
|
|
5277 Vautoload_queue = Qnil;
|
|
|
5278
|
|
|
5279 staticpro (&Vcondition_handlers);
|
|
|
5280
|
|
|
5281 staticpro (&Vcurrent_warning_class);
|
|
|
5282 Vcurrent_warning_class = Qnil;
|
|
|
5283
|
|
|
5284 staticpro (&Vcurrent_error_state);
|
|
|
5285 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5286
|
|
|
5287 Qunbound_suspended_errors_tag = make_opaque_long (0);
|
|
|
5288 staticpro (&Qunbound_suspended_errors_tag);
|
|
|
5289
|
|
|
5290 specpdl_size = 50;
|
|
|
5291 specpdl_depth_counter = 0;
|
|
|
5292 specpdl = (struct specbinding *)
|
|
|
5293 xmalloc (specpdl_size * sizeof (struct specbinding));
|
|
|
5294 /* XEmacs change: increase these values. */
|
|
|
5295 max_specpdl_size = 3000;
|
|
|
5296 max_lisp_eval_depth = 500;
|
|
|
5297 throw_level = 0;
|
|
|
5298
|
|
|
5299 reinit_eval ();
|
|
|
5300 }
|
