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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
|
|
165
|
480 extern Lisp_Object Frunning_temacs_p(), Ferror_message_string(Lisp_Object obj);
|
|
163
|
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;
|
|
165
|
488 #if 0
|
|
|
489 struct gcpro gcpro1;
|
|
|
490 #endif
|
|
|
491
|
|
|
492 /* Comment by Hrvoje Niksic:
|
|
|
493 For some reason, Ferror_message_string loses in temacs. This
|
|
|
494 should require some more consideration than this knee-jerk
|
|
|
495 solution, but it will do for now. For those interested in
|
|
|
496 debugging, here is what happens:
|
|
|
497
|
|
|
498 In temacs, a condition-cased file-error occurs. Now, we enter
|
|
|
499 signal_call_debugger, which is supposed to decide whether we
|
|
|
500 should call debugger (for example, if `debug-on-signal' requires
|
|
|
501 it). signal_call_debugger calls skip_debugger, which calls
|
|
|
502 Ferror_message_string. Ferror_message_string in turn calls
|
|
|
503 print_error_message. For some unfathomable reason, the
|
|
|
504 expression
|
|
|
505
|
|
|
506 errname = Fcar (data);
|
|
|
507
|
|
|
508 fails with a `wrong-type-argument' error, which should not
|
|
|
509 happen, as the DATA argument is the very same Lisp_Object
|
|
|
510 skip_debugger was called with (which is in signal_call_debugger,
|
|
|
511 and the DATA argument is Fcons (FOO, BAR)).
|
|
|
512
|
|
|
513 Of course, since an error is signaled, signal_call_debugger gets
|
|
|
514 called again, which calls skip_debugger, and we end up with a
|
|
|
515 beautiful endless recursion.
|
|
|
516
|
|
|
517 The only explanation I can think of is that DATA should be
|
|
|
518 gc-protected during the way; I cannot test this, as I cannot
|
|
|
519 repeat all of this. The crash info comes from Steve. */
|
|
|
520 #if 0
|
|
|
521 if (!NILP(Frunning_temacs_p()))
|
|
163
|
522 {
|
|
165
|
523 return 0;
|
|
163
|
524 }
|
|
165
|
525 #endif
|
|
|
526 #if 0
|
|
|
527 GCPRO1(data);
|
|
|
528 #endif
|
|
163
|
529
|
|
|
530 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
531 {
|
|
|
532 if (STRINGP (XCAR (tail)))
|
|
|
533 {
|
|
|
534 if (first_string)
|
|
|
535 {
|
|
165
|
536 error_message = Ferror_message_string (data);
|
|
|
537 /* error_message = build_string("Tell_Hrvoje"); */
|
|
163
|
538 first_string = 0;
|
|
|
539 }
|
|
165
|
540 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) {
|
|
|
541 #if 0
|
|
|
542 UNGCPRO;
|
|
|
543 #endif
|
|
163
|
544 return 1;
|
|
165
|
545 }
|
|
163
|
546 }
|
|
|
547 else
|
|
|
548 {
|
|
|
549 Lisp_Object contail;
|
|
|
550
|
|
|
551 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
165
|
552 if (EQ (XCAR (tail), XCAR (contail))) {
|
|
|
553 #if 0
|
|
|
554 UNGCPRO;
|
|
|
555 #endif
|
|
163
|
556 return 1;
|
|
165
|
557 }
|
|
163
|
558 }
|
|
|
559 }
|
|
|
560
|
|
165
|
561 #if 0
|
|
|
562 UNGCPRO;
|
|
|
563 #endif
|
|
163
|
564 return 0;
|
|
|
565 }
|
|
|
566
|
|
0
|
567 /* Actually generate a backtrace on STREAM. */
|
|
|
568
|
|
|
569 static Lisp_Object
|
|
|
570 backtrace_259 (Lisp_Object stream)
|
|
|
571 {
|
|
|
572 return (Fbacktrace (stream, Qt));
|
|
|
573 }
|
|
|
574
|
|
|
575 /* An error was signalled. Maybe call the debugger, if the `debug-on-error'
|
|
|
576 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
577 associated with the error being signalled. SIG is the actual error
|
|
|
578 being signalled, and DATA is the associated data (these are exactly
|
|
|
579 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
580 list of error handlers that are to be put in place while the debugger
|
|
|
581 is called. This is generally the remaining handlers that are
|
|
|
582 outside of the innermost handler trapping this error. This way,
|
|
|
583 if the same error occurs inside of the debugger, you usually don't get
|
|
|
584 the debugger entered recursively.
|
|
|
585
|
|
|
586 This function returns Qunbound if it didn't call the debugger or if
|
|
|
587 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
588 debugger was never entered. Otherwise, it returns the value
|
|
|
589 that the user specified with `r'. (Note that much of the time,
|
|
|
590 the user will abort with C-], and we will never have a chance to
|
|
|
591 return anything at all.)
|
|
|
592
|
|
|
593 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
594 and stack-trace-on-signal to control whether we do anything.
|
|
|
595 This is so that debug-on-error doesn't make handled errors
|
|
|
596 cause the debugger to get invoked.
|
|
|
597
|
|
|
598 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
599 those functions aren't done more than once in a single `signal'
|
|
|
600 session. */
|
|
|
601
|
|
|
602 static Lisp_Object
|
|
|
603 signal_call_debugger (Lisp_Object conditions,
|
|
|
604 Lisp_Object sig, Lisp_Object data,
|
|
|
605 Lisp_Object active_handlers,
|
|
|
606 int signal_vars_only,
|
|
|
607 int *stack_trace_displayed,
|
|
|
608 int *debugger_entered)
|
|
|
609 {
|
|
|
610 /* This function can GC */
|
|
|
611 Lisp_Object val = Qunbound;
|
|
|
612 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
613 int speccount = specpdl_depth_counter;
|
|
163
|
614 int skip_debugger_for_error = 0;
|
|
0
|
615 struct gcpro gcpro1;
|
|
|
616 GCPRO1 (all_handlers);
|
|
|
617
|
|
|
618 Vcondition_handlers = active_handlers;
|
|
|
619
|
|
163
|
620 skip_debugger_for_error = skip_debugger (conditions, Fcons (sig, data));
|
|
|
621
|
|
|
622 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
|
623 && !skip_debugger_for_error
|
|
0
|
624 && wants_debugger (Vstack_trace_on_error, conditions))
|
|
|
625 {
|
|
|
626 specbind (Qdebug_on_error, Qnil);
|
|
|
627 specbind (Qstack_trace_on_error, Qnil);
|
|
|
628 specbind (Qdebug_on_signal, Qnil);
|
|
|
629 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
630
|
|
|
631 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
632 backtrace_259,
|
|
|
633 Qnil,
|
|
|
634 Qnil);
|
|
|
635 unbind_to (speccount, Qnil);
|
|
|
636 *stack_trace_displayed = 1;
|
|
|
637 }
|
|
|
638
|
|
|
639 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
163
|
640 && !skip_debugger_for_error
|
|
0
|
641 && (EQ (sig, Qquit)
|
|
|
642 ? debug_on_quit
|
|
|
643 : wants_debugger (Vdebug_on_error, conditions)))
|
|
|
644 {
|
|
|
645 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
646 specbind (Qdebug_on_error, Qnil);
|
|
|
647 specbind (Qstack_trace_on_error, Qnil);
|
|
|
648 specbind (Qdebug_on_signal, Qnil);
|
|
|
649 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
650
|
|
|
651 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
652 *debugger_entered = 1;
|
|
|
653 }
|
|
|
654
|
|
|
655 if (!entering_debugger && !*stack_trace_displayed
|
|
|
656 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
657 {
|
|
|
658 specbind (Qdebug_on_error, Qnil);
|
|
|
659 specbind (Qstack_trace_on_error, Qnil);
|
|
|
660 specbind (Qdebug_on_signal, Qnil);
|
|
|
661 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
662
|
|
|
663 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
664 backtrace_259,
|
|
|
665 Qnil,
|
|
|
666 Qnil);
|
|
|
667 unbind_to (speccount, Qnil);
|
|
|
668 *stack_trace_displayed = 1;
|
|
|
669 }
|
|
|
670
|
|
|
671 if (!entering_debugger && !*debugger_entered
|
|
|
672 && (EQ (sig, Qquit)
|
|
|
673 ? debug_on_quit
|
|
|
674 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
675 {
|
|
|
676 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
677 specbind (Qdebug_on_error, Qnil);
|
|
|
678 specbind (Qstack_trace_on_error, Qnil);
|
|
|
679 specbind (Qdebug_on_signal, Qnil);
|
|
|
680 specbind (Qstack_trace_on_signal, Qnil);
|
|
|
681
|
|
|
682 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
683 *debugger_entered = 1;
|
|
|
684 }
|
|
|
685
|
|
|
686 UNGCPRO;
|
|
|
687 Vcondition_handlers = all_handlers;
|
|
|
688 return (unbind_to (speccount, val));
|
|
|
689 }
|
|
|
690
|
|
|
691
|
|
|
692 /**********************************************************************/
|
|
|
693 /* The basic special forms */
|
|
|
694 /**********************************************************************/
|
|
|
695
|
|
|
696 /* NOTE!!! Every function that can call EVAL must protect its args
|
|
|
697 and temporaries from garbage collection while it needs them.
|
|
|
698 The definition of `For' shows what you have to do. */
|
|
|
699
|
|
20
|
700 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
701 Eval args until one of them yields non-nil, then return that value.
|
|
|
702 The remaining args are not evalled at all.
|
|
|
703 If all args return nil, return nil.
|
|
20
|
704 */
|
|
|
705 (args))
|
|
0
|
706 {
|
|
|
707 /* This function can GC */
|
|
|
708 REGISTER Lisp_Object val;
|
|
|
709 Lisp_Object args_left;
|
|
|
710 struct gcpro gcpro1;
|
|
|
711
|
|
|
712 if (NILP (args))
|
|
|
713 return Qnil;
|
|
|
714
|
|
|
715 args_left = args;
|
|
|
716 GCPRO1 (args_left);
|
|
|
717
|
|
|
718 do
|
|
|
719 {
|
|
|
720 val = Feval (Fcar (args_left));
|
|
|
721 if (!NILP (val))
|
|
|
722 break;
|
|
|
723 args_left = Fcdr (args_left);
|
|
|
724 }
|
|
|
725 while (!NILP (args_left));
|
|
|
726
|
|
|
727 UNGCPRO;
|
|
|
728 return val;
|
|
|
729 }
|
|
|
730
|
|
20
|
731 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
732 Eval args until one of them yields nil, then return nil.
|
|
|
733 The remaining args are not evalled at all.
|
|
|
734 If no arg yields nil, return the last arg's value.
|
|
20
|
735 */
|
|
|
736 (args))
|
|
0
|
737 {
|
|
|
738 /* This function can GC */
|
|
|
739 REGISTER Lisp_Object val;
|
|
|
740 Lisp_Object args_left;
|
|
|
741 struct gcpro gcpro1;
|
|
|
742
|
|
|
743 if (NILP (args))
|
|
|
744 return Qt;
|
|
|
745
|
|
|
746 args_left = args;
|
|
|
747 GCPRO1 (args_left);
|
|
|
748
|
|
|
749 do
|
|
|
750 {
|
|
|
751 val = Feval (Fcar (args_left));
|
|
|
752 if (NILP (val))
|
|
|
753 break;
|
|
|
754 args_left = Fcdr (args_left);
|
|
|
755 }
|
|
|
756 while (!NILP (args_left));
|
|
|
757
|
|
|
758 UNGCPRO;
|
|
|
759 return val;
|
|
|
760 }
|
|
|
761
|
|
20
|
762 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
0
|
763 (if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
|
764 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
765 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
766 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
767 */
|
|
70
|
768 (args))
|
|
0
|
769 {
|
|
|
770 /* This function can GC */
|
|
|
771 Lisp_Object cond;
|
|
|
772 struct gcpro gcpro1;
|
|
|
773
|
|
|
774 GCPRO1 (args);
|
|
|
775 cond = Feval (Fcar (args));
|
|
|
776 UNGCPRO;
|
|
|
777
|
|
|
778 if (!NILP (cond))
|
|
|
779 return Feval (Fcar (Fcdr (args)));
|
|
|
780 return Fprogn (Fcdr (Fcdr (args)));
|
|
|
781 }
|
|
|
782
|
|
20
|
783 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
784 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
785 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
786 and, if the value is non-nil, this clause succeeds:
|
|
|
787 then the expressions in BODY are evaluated and the last one's
|
|
|
788 value is the value of the cond-form.
|
|
|
789 If no clause succeeds, cond returns nil.
|
|
|
790 If a clause has one element, as in (CONDITION),
|
|
|
791 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
792 */
|
|
|
793 (args))
|
|
0
|
794 {
|
|
|
795 /* This function can GC */
|
|
|
796 REGISTER Lisp_Object clause, val;
|
|
|
797 struct gcpro gcpro1;
|
|
|
798
|
|
|
799 val = Qnil;
|
|
|
800 GCPRO1 (args);
|
|
|
801 while (!NILP (args))
|
|
|
802 {
|
|
|
803 clause = Fcar (args);
|
|
|
804 val = Feval (Fcar (clause));
|
|
|
805 if (!NILP (val))
|
|
|
806 {
|
|
|
807 if (!EQ (XCDR (clause), Qnil))
|
|
|
808 val = Fprogn (XCDR (clause));
|
|
|
809 break;
|
|
|
810 }
|
|
|
811 args = XCDR (args);
|
|
|
812 }
|
|
|
813 UNGCPRO;
|
|
|
814
|
|
|
815 return val;
|
|
|
816 }
|
|
|
817
|
|
20
|
818 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
0
|
819 (progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
820 */
|
|
|
821 (args))
|
|
0
|
822 {
|
|
|
823 /* This function can GC */
|
|
|
824 REGISTER Lisp_Object val;
|
|
|
825 Lisp_Object args_left;
|
|
|
826 struct gcpro gcpro1;
|
|
|
827
|
|
|
828 if (NILP (args))
|
|
|
829 return Qnil;
|
|
|
830
|
|
|
831 args_left = args;
|
|
|
832 GCPRO1 (args_left);
|
|
|
833
|
|
|
834 do
|
|
|
835 {
|
|
|
836 val = Feval (Fcar (args_left));
|
|
|
837 args_left = Fcdr (args_left);
|
|
|
838 }
|
|
|
839 while (!NILP (args_left));
|
|
|
840
|
|
|
841 UNGCPRO;
|
|
|
842 return val;
|
|
|
843 }
|
|
|
844
|
|
20
|
845 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
0
|
846 (prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.
|
|
|
847 The value of FIRST is saved during the evaluation of the remaining args,
|
|
|
848 whose values are discarded.
|
|
20
|
849 */
|
|
|
850 (args))
|
|
0
|
851 {
|
|
|
852 /* This function can GC */
|
|
|
853 Lisp_Object val;
|
|
|
854 REGISTER Lisp_Object args_left;
|
|
|
855 struct gcpro gcpro1, gcpro2;
|
|
|
856 REGISTER int argnum = 0;
|
|
|
857
|
|
|
858 if (NILP (args))
|
|
|
859 return Qnil;
|
|
|
860
|
|
|
861 args_left = args;
|
|
|
862 val = Qnil;
|
|
|
863 GCPRO2 (args, val);
|
|
|
864
|
|
|
865 do
|
|
|
866 {
|
|
|
867 if (!(argnum++))
|
|
|
868 val = Feval (Fcar (args_left));
|
|
|
869 else
|
|
|
870 Feval (Fcar (args_left));
|
|
|
871 args_left = Fcdr (args_left);
|
|
|
872 }
|
|
|
873 while (!NILP (args_left));
|
|
|
874
|
|
|
875 UNGCPRO;
|
|
|
876 return val;
|
|
|
877 }
|
|
|
878
|
|
20
|
879 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
0
|
880 (prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.
|
|
|
881 The value of Y is saved during the evaluation of the remaining args,
|
|
|
882 whose values are discarded.
|
|
20
|
883 */
|
|
|
884 (args))
|
|
0
|
885 {
|
|
|
886 /* This function can GC */
|
|
|
887 Lisp_Object val;
|
|
|
888 REGISTER Lisp_Object args_left;
|
|
|
889 struct gcpro gcpro1, gcpro2;
|
|
|
890 REGISTER int argnum = -1;
|
|
|
891
|
|
|
892 val = Qnil;
|
|
|
893
|
|
|
894 if (NILP (args))
|
|
|
895 return Qnil;
|
|
|
896
|
|
|
897 args_left = args;
|
|
|
898 val = Qnil;
|
|
|
899 GCPRO2 (args, val);
|
|
|
900
|
|
|
901 do
|
|
|
902 {
|
|
|
903 if (!(argnum++))
|
|
|
904 val = Feval (Fcar (args_left));
|
|
|
905 else
|
|
|
906 Feval (Fcar (args_left));
|
|
|
907 args_left = Fcdr (args_left);
|
|
|
908 }
|
|
|
909 while (!NILP (args_left));
|
|
|
910
|
|
|
911 UNGCPRO;
|
|
|
912 return val;
|
|
|
913 }
|
|
|
914
|
|
20
|
915 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
0
|
916 (let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
917 The value of the last form in BODY is returned.
|
|
|
918 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
919 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
920 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
921 */
|
|
|
922 (args))
|
|
0
|
923 {
|
|
|
924 /* This function can GC */
|
|
|
925 Lisp_Object varlist, val, elt;
|
|
|
926 int speccount = specpdl_depth_counter;
|
|
|
927 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
928
|
|
|
929 GCPRO3 (args, elt, varlist);
|
|
|
930
|
|
|
931 varlist = Fcar (args);
|
|
|
932 while (!NILP (varlist))
|
|
|
933 {
|
|
|
934 QUIT;
|
|
|
935 elt = Fcar (varlist);
|
|
|
936 if (SYMBOLP (elt))
|
|
|
937 specbind (elt, Qnil);
|
|
|
938 else if (! NILP (Fcdr (Fcdr (elt))))
|
|
|
939 signal_simple_error ("`let' bindings can have only one value-form",
|
|
|
940 elt);
|
|
|
941 else
|
|
|
942 {
|
|
|
943 val = Feval (Fcar (Fcdr (elt)));
|
|
|
944 specbind (Fcar (elt), val);
|
|
|
945 }
|
|
|
946 varlist = Fcdr (varlist);
|
|
|
947 }
|
|
|
948 UNGCPRO;
|
|
|
949 val = Fprogn (Fcdr (args));
|
|
|
950 return unbind_to (speccount, val);
|
|
|
951 }
|
|
|
952
|
|
20
|
953 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
0
|
954 (let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
|
955 The value of the last form in BODY is returned.
|
|
|
956 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
957 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
958 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
959 */
|
|
|
960 (args))
|
|
0
|
961 {
|
|
|
962 /* This function can GC */
|
|
|
963 Lisp_Object *temps, tem;
|
|
|
964 REGISTER Lisp_Object elt, varlist;
|
|
|
965 int speccount = specpdl_depth_counter;
|
|
|
966 REGISTER int argnum;
|
|
|
967 struct gcpro gcpro1, gcpro2;
|
|
|
968
|
|
|
969 varlist = Fcar (args);
|
|
|
970
|
|
|
971 /* Make space to hold the values to give the bound variables */
|
|
|
972 elt = Flength (varlist);
|
|
|
973 temps = (Lisp_Object *) alloca (XINT (elt) * sizeof (Lisp_Object));
|
|
|
974
|
|
|
975 /* Compute the values and store them in `temps' */
|
|
|
976
|
|
|
977 GCPRO2 (args, *temps);
|
|
|
978 gcpro2.nvars = 0;
|
|
|
979
|
|
|
980 for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
|
|
|
981 {
|
|
|
982 QUIT;
|
|
|
983 elt = Fcar (varlist);
|
|
|
984 if (SYMBOLP (elt))
|
|
|
985 temps [argnum++] = Qnil;
|
|
|
986 else if (! NILP (Fcdr (Fcdr (elt))))
|
|
|
987 signal_simple_error ("`let' bindings can have only one value-form",
|
|
|
988 elt);
|
|
|
989 else
|
|
|
990 temps [argnum++] = Feval (Fcar (Fcdr (elt)));
|
|
|
991 gcpro2.nvars = argnum;
|
|
|
992 }
|
|
|
993 UNGCPRO;
|
|
|
994
|
|
|
995 varlist = Fcar (args);
|
|
|
996 for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
|
|
|
997 {
|
|
|
998 elt = Fcar (varlist);
|
|
|
999 tem = temps[argnum++];
|
|
|
1000 if (SYMBOLP (elt))
|
|
|
1001 specbind (elt, tem);
|
|
|
1002 else
|
|
|
1003 specbind (Fcar (elt), tem);
|
|
|
1004 }
|
|
|
1005
|
|
|
1006 elt = Fprogn (Fcdr (args));
|
|
|
1007 return unbind_to (speccount, elt);
|
|
|
1008 }
|
|
|
1009
|
|
20
|
1010 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
0
|
1011 (while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
|
1012 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
1013 until TEST returns nil.
|
|
20
|
1014 */
|
|
70
|
1015 (args))
|
|
0
|
1016 {
|
|
|
1017 /* This function can GC */
|
|
|
1018 Lisp_Object test, body, tem;
|
|
|
1019 struct gcpro gcpro1, gcpro2;
|
|
|
1020
|
|
|
1021 GCPRO2 (test, body);
|
|
|
1022
|
|
|
1023 test = Fcar (args);
|
|
|
1024 body = Fcdr (args);
|
|
|
1025 while (tem = Feval (test), !NILP (tem))
|
|
|
1026 {
|
|
|
1027 QUIT;
|
|
|
1028 Fprogn (body);
|
|
|
1029 }
|
|
|
1030
|
|
|
1031 UNGCPRO;
|
|
|
1032 return Qnil;
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 Lisp_Object Qsetq;
|
|
|
1036
|
|
20
|
1037 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
0
|
1038 (setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
|
1039 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
1040 The values VAL are expressions; they are evaluated.
|
|
|
1041 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
1042 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
1043 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
1044 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
1045 */
|
|
|
1046 (args))
|
|
0
|
1047 {
|
|
|
1048 /* This function can GC */
|
|
|
1049 REGISTER Lisp_Object args_left;
|
|
|
1050 REGISTER Lisp_Object val, sym;
|
|
|
1051 struct gcpro gcpro1;
|
|
|
1052
|
|
|
1053 if (NILP (args))
|
|
|
1054 return Qnil;
|
|
|
1055
|
|
|
1056 val = Flength (args);
|
|
|
1057 if (XINT (val) & 1) /* Odd number of arguments? */
|
|
|
1058 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, val));
|
|
|
1059
|
|
|
1060 args_left = args;
|
|
|
1061 GCPRO1 (args);
|
|
|
1062
|
|
|
1063 do
|
|
|
1064 {
|
|
|
1065 val = Feval (Fcar (Fcdr (args_left)));
|
|
|
1066 sym = Fcar (args_left);
|
|
|
1067 Fset (sym, val);
|
|
|
1068 args_left = Fcdr (Fcdr (args_left));
|
|
|
1069 }
|
|
|
1070 while (!NILP (args_left));
|
|
|
1071
|
|
|
1072 UNGCPRO;
|
|
|
1073 return val;
|
|
|
1074 }
|
|
|
1075
|
|
20
|
1076 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
1077 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
1078 */
|
|
|
1079 (args))
|
|
0
|
1080 {
|
|
|
1081 return Fcar (args);
|
|
|
1082 }
|
|
|
1083
|
|
20
|
1084 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
1085 Like `quote', but preferred for objects which are functions.
|
|
|
1086 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1087 `quote' cannot do that.
|
|
20
|
1088 */
|
|
|
1089 (args))
|
|
0
|
1090 {
|
|
|
1091 return Fcar (args);
|
|
|
1092 }
|
|
|
1093
|
|
|
1094
|
|
|
1095 /**********************************************************************/
|
|
|
1096 /* Defining functions/variables */
|
|
|
1097 /**********************************************************************/
|
|
|
1098
|
|
20
|
1099 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
0
|
1100 (defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
|
1101 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1102 See also the function `interactive'.
|
|
20
|
1103 */
|
|
|
1104 (args))
|
|
0
|
1105 {
|
|
|
1106 /* This function can GC */
|
|
|
1107 Lisp_Object fn_name;
|
|
|
1108 Lisp_Object defn;
|
|
|
1109
|
|
|
1110 fn_name = Fcar (args);
|
|
|
1111 defn = Fcons (Qlambda, Fcdr (args));
|
|
|
1112 if (purify_flag)
|
|
|
1113 defn = Fpurecopy (defn);
|
|
|
1114 Ffset (fn_name, defn);
|
|
|
1115 LOADHIST_ATTACH (fn_name);
|
|
|
1116 return fn_name;
|
|
|
1117 }
|
|
|
1118
|
|
20
|
1119 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
0
|
1120 (defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
|
1121 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1122 When the macro is called, as in (NAME ARGS...),
|
|
|
1123 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1124 the list ARGS... as it appears in the expression,
|
|
|
1125 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1126 */
|
|
|
1127 (args))
|
|
0
|
1128 {
|
|
|
1129 /* This function can GC */
|
|
|
1130 Lisp_Object fn_name;
|
|
|
1131 Lisp_Object defn;
|
|
|
1132
|
|
|
1133 fn_name = Fcar (args);
|
|
|
1134 defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args)));
|
|
|
1135 if (purify_flag)
|
|
|
1136 defn = Fpurecopy (defn);
|
|
|
1137 Ffset (fn_name, defn);
|
|
|
1138 LOADHIST_ATTACH (fn_name);
|
|
|
1139 return fn_name;
|
|
|
1140 }
|
|
|
1141
|
|
20
|
1142 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
0
|
1143 (defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
|
1144 You are not required to define a variable in order to use it,
|
|
|
1145 but the definition can supply documentation and an initial value
|
|
|
1146 in a way that tags can recognize.
|
|
|
1147
|
|
|
1148 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1149 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1150 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1151 void.)
|
|
|
1152 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1153 buffer-local values are not affected.
|
|
|
1154 INITVALUE and DOCSTRING are optional.
|
|
|
1155 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1156 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1157 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1158
|
|
|
1159 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1160 */
|
|
|
1161 (args))
|
|
0
|
1162 {
|
|
|
1163 /* This function can GC */
|
|
|
1164 REGISTER Lisp_Object sym, tem, tail;
|
|
|
1165
|
|
|
1166 sym = Fcar (args);
|
|
|
1167 tail = Fcdr (args);
|
|
|
1168 if (!NILP (Fcdr (Fcdr (tail))))
|
|
|
1169 error ("too many arguments");
|
|
|
1170
|
|
|
1171 if (!NILP (tail))
|
|
|
1172 {
|
|
|
1173 tem = Fdefault_boundp (sym);
|
|
|
1174 if (NILP (tem))
|
|
|
1175 Fset_default (sym, Feval (Fcar (Fcdr (args))));
|
|
|
1176 }
|
|
|
1177
|
|
|
1178 #ifdef I18N3
|
|
|
1179 if (!NILP (Vfile_domain))
|
|
|
1180 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1181 #endif
|
|
|
1182
|
|
|
1183 tail = Fcdr (Fcdr (args));
|
|
|
1184 if (!NILP (Fcar (tail)))
|
|
|
1185 {
|
|
|
1186 tem = Fcar (tail);
|
|
|
1187 #if 0 /* FSFmacs */
|
|
|
1188 /* #### We should probably do this but it might be dangerous */
|
|
|
1189 if (purify_flag)
|
|
|
1190 tem = Fpurecopy (tem);
|
|
|
1191 Fput (sym, Qvariable_documentation, tem);
|
|
|
1192 #else
|
|
|
1193 pure_put (sym, Qvariable_documentation, tem);
|
|
|
1194 #endif
|
|
|
1195 }
|
|
|
1196
|
|
|
1197 LOADHIST_ATTACH (sym);
|
|
|
1198 return sym;
|
|
|
1199 }
|
|
|
1200
|
|
20
|
1201 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
0
|
1202 (defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
|
1203 variable.
|
|
|
1204 The intent is that programs do not change this value, but users may.
|
|
|
1205 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1206 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1207 buffer-local values are not affected.
|
|
|
1208 DOCSTRING is optional.
|
|
|
1209 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1210 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1211
|
|
|
1212 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1213 normally loaded, since it is useful for users to be able to specify
|
|
|
1214 their own values for such variables before loading the library.
|
|
|
1215 Since `defconst' unconditionally assigns the variable,
|
|
|
1216 it would override the user's choice.
|
|
20
|
1217 */
|
|
|
1218 (args))
|
|
0
|
1219 {
|
|
|
1220 /* This function can GC */
|
|
|
1221 REGISTER Lisp_Object sym, tem;
|
|
|
1222
|
|
|
1223 sym = Fcar (args);
|
|
|
1224 if (!NILP (Fcdr (Fcdr (Fcdr (args)))))
|
|
|
1225 error ("too many arguments");
|
|
|
1226
|
|
|
1227 Fset_default (sym, Feval (Fcar (Fcdr (args))));
|
|
|
1228
|
|
|
1229 #ifdef I18N3
|
|
|
1230 if (!NILP (Vfile_domain))
|
|
|
1231 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1232 #endif
|
|
|
1233
|
|
|
1234 tem = Fcar (Fcdr (Fcdr (args)));
|
|
|
1235
|
|
|
1236 if (!NILP (tem))
|
|
|
1237 #if 0 /* FSFmacs */
|
|
|
1238 /* #### We should probably do this but it might be dangerous */
|
|
|
1239 {
|
|
|
1240 if (purify_flag)
|
|
|
1241 tem = Fpurecopy (tem);
|
|
|
1242 Fput (sym, Qvariable_documentation, tem);
|
|
|
1243 }
|
|
|
1244 #else
|
|
|
1245 pure_put (sym, Qvariable_documentation, tem);
|
|
|
1246 #endif
|
|
|
1247
|
|
|
1248 LOADHIST_ATTACH (sym);
|
|
|
1249 return sym;
|
|
|
1250 }
|
|
|
1251
|
|
20
|
1252 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1253 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1254 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1255 Determined by whether the first character of the documentation
|
|
|
1256 for the variable is `*'.
|
|
20
|
1257 */
|
|
|
1258 (variable))
|
|
0
|
1259 {
|
|
|
1260 Lisp_Object documentation;
|
|
|
1261
|
|
|
1262 documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1263 if (INTP (documentation) && XINT (documentation) < 0)
|
|
|
1264 return Qt;
|
|
|
1265 if ((STRINGP (documentation)) &&
|
|
|
1266 (string_byte (XSTRING (documentation), 0) == '*'))
|
|
|
1267 return Qt;
|
|
|
1268 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1269 if (CONSP (documentation)
|
|
|
1270 && STRINGP (XCAR (documentation))
|
|
|
1271 && INTP (XCDR (documentation))
|
|
|
1272 && XINT (XCDR (documentation)) < 0)
|
|
|
1273 return Qt;
|
|
|
1274 return Qnil;
|
|
|
1275 }
|
|
|
1276
|
|
20
|
1277 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1278 Return result of expanding macros at top level of FORM.
|
|
|
1279 If FORM is not a macro call, it is returned unchanged.
|
|
|
1280 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1281 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1282
|
|
|
1283 The second optional arg ENVIRONMENT species an environment of macro
|
|
|
1284 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1285 */
|
|
|
1286 (form, env))
|
|
0
|
1287 {
|
|
|
1288 /* This function can GC */
|
|
|
1289 /* With cleanups from Hallvard Furuseth. */
|
|
|
1290 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1291
|
|
|
1292 while (1)
|
|
|
1293 {
|
|
|
1294 /* Come back here each time we expand a macro call,
|
|
|
1295 in case it expands into another macro call. */
|
|
|
1296 if (!CONSP (form))
|
|
|
1297 break;
|
|
|
1298 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1299 def = sym = XCAR (form);
|
|
|
1300 tem = Qnil;
|
|
|
1301 /* Trace symbols aliases to other symbols
|
|
|
1302 until we get a symbol that is not an alias. */
|
|
|
1303 while (SYMBOLP (def))
|
|
|
1304 {
|
|
|
1305 QUIT;
|
|
|
1306 sym = def;
|
|
|
1307 tem = Fassq (sym, env);
|
|
|
1308 if (NILP (tem))
|
|
|
1309 {
|
|
|
1310 def = XSYMBOL (sym)->function;
|
|
|
1311 if (!UNBOUNDP (def))
|
|
|
1312 continue;
|
|
|
1313 }
|
|
|
1314 break;
|
|
|
1315 }
|
|
|
1316 /* Right now TEM is the result from SYM in ENV,
|
|
|
1317 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1318 if (NILP (tem))
|
|
|
1319 {
|
|
|
1320 /* SYM is not mentioned in ENV.
|
|
|
1321 Look at its function definition. */
|
|
|
1322 if (UNBOUNDP (def)
|
|
|
1323 || !CONSP (def))
|
|
|
1324 /* Not defined or definition not suitable */
|
|
|
1325 break;
|
|
|
1326 if (EQ (XCAR (def), Qautoload))
|
|
|
1327 {
|
|
|
1328 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1329 tem = Felt (def, make_int (4));
|
|
|
1330 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1331 {
|
|
|
1332 /* Yes, load it and try again. */
|
|
|
1333 do_autoload (def, sym);
|
|
|
1334 continue;
|
|
|
1335 }
|
|
|
1336 else
|
|
|
1337 break;
|
|
|
1338 }
|
|
|
1339 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1340 break;
|
|
|
1341 else expander = XCDR (def);
|
|
|
1342 }
|
|
|
1343 else
|
|
|
1344 {
|
|
|
1345 expander = XCDR (tem);
|
|
|
1346 if (NILP (expander))
|
|
|
1347 break;
|
|
|
1348 }
|
|
|
1349 form = apply1 (expander, XCDR (form));
|
|
|
1350 }
|
|
|
1351 return form;
|
|
|
1352 }
|
|
|
1353
|
|
|
1354
|
|
|
1355 /**********************************************************************/
|
|
|
1356 /* Non-local exits */
|
|
|
1357 /**********************************************************************/
|
|
|
1358
|
|
20
|
1359 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
0
|
1360 (catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
|
1361 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1362 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1363 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1364 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1365 */
|
|
|
1366 (args))
|
|
0
|
1367 {
|
|
|
1368 /* This function can GC */
|
|
|
1369 Lisp_Object tag;
|
|
|
1370 struct gcpro gcpro1;
|
|
|
1371
|
|
|
1372 GCPRO1 (args);
|
|
|
1373 tag = Feval (Fcar (args));
|
|
|
1374 UNGCPRO;
|
|
|
1375 return internal_catch (tag, Fprogn, Fcdr (args), 0);
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1379 FUNC should return a Lisp_Object.
|
|
|
1380 This is how catches are done from within C code. */
|
|
|
1381
|
|
|
1382 Lisp_Object
|
|
|
1383 internal_catch (Lisp_Object tag,
|
|
|
1384 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1385 Lisp_Object arg,
|
|
|
1386 int *threw)
|
|
|
1387 {
|
|
|
1388 /* This structure is made part of the chain `catchlist'. */
|
|
|
1389 struct catchtag c;
|
|
|
1390
|
|
|
1391 /* Fill in the components of c, and put it on the list. */
|
|
|
1392 c.next = catchlist;
|
|
|
1393 c.tag = tag;
|
|
|
1394 c.val = Qnil;
|
|
|
1395 c.backlist = backtrace_list;
|
|
|
1396 #if 0 /* FSFmacs */
|
|
|
1397 /* #### */
|
|
|
1398 c.handlerlist = handlerlist;
|
|
|
1399 #endif
|
|
|
1400 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1401 c.pdlcount = specpdl_depth_counter;
|
|
|
1402 #if 0 /* FSFmacs */
|
|
|
1403 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1404 #endif
|
|
|
1405 c.gcpro = gcprolist;
|
|
|
1406 catchlist = &c;
|
|
|
1407
|
|
|
1408 /* Call FUNC. */
|
|
|
1409 if (SETJMP (c.jmp))
|
|
|
1410 {
|
|
|
1411 /* Throw works by a longjmp that comes right here. */
|
|
|
1412 if (threw) *threw = 1;
|
|
|
1413 return (c.val);
|
|
|
1414 }
|
|
|
1415 c.val = (*func) (arg);
|
|
|
1416 if (threw) *threw = 0;
|
|
|
1417 catchlist = c.next;
|
|
|
1418 return (c.val);
|
|
|
1419 }
|
|
|
1420
|
|
|
1421
|
|
|
1422 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1423 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1424
|
|
|
1425 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1426 they choose the catch tag to throw to. A catch tag for a
|
|
|
1427 condition-case form has a TAG of Qnil.
|
|
|
1428
|
|
|
1429 Before each catch is discarded, unbind all special bindings and
|
|
|
1430 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1431 the handler stack as we go, so that the proper handlers are in
|
|
|
1432 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1433 some static info saved in CATCH, and longjmp to the location
|
|
|
1434 specified in the
|
|
|
1435
|
|
|
1436 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1437
|
|
|
1438 static void
|
|
|
1439 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1440 {
|
|
|
1441 #if 0 /* FSFmacs */
|
|
|
1442 /* #### */
|
|
|
1443 register int last_time;
|
|
|
1444 #endif
|
|
|
1445
|
|
|
1446 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1447 Before each catch is discarded, unbind all special bindings
|
|
|
1448 and execute all unwind-protect clauses made above that catch.
|
|
|
1449 At the end, restore some static info saved in CATCH,
|
|
|
1450 and longjmp to the location specified.
|
|
|
1451 */
|
|
|
1452
|
|
|
1453 /* Save the value somewhere it will be GC'ed.
|
|
|
1454 (Can't overwrite tag slot because an unwind-protect may
|
|
|
1455 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1456 c->val = val;
|
|
|
1457
|
|
|
1458 #if 0 /* FSFmacs */
|
|
|
1459 /* Restore the polling-suppression count. */
|
|
|
1460 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1461 #endif
|
|
|
1462
|
|
|
1463 #if 0 /* FSFmacs */
|
|
|
1464 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1465 do
|
|
|
1466 {
|
|
|
1467 last_time = catchlist == c;
|
|
|
1468
|
|
|
1469 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1470 handlers. */
|
|
|
1471 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1472 handlerlist = catchlist->handlerlist;
|
|
|
1473 catchlist = catchlist->next;
|
|
|
1474 }
|
|
|
1475 while (! last_time);
|
|
|
1476 #else /* Actual XEmacs code */
|
|
|
1477 /* Unwind the specpdl stack */
|
|
|
1478 unbind_to (c->pdlcount, Qnil);
|
|
|
1479 catchlist = c->next;
|
|
|
1480 #endif
|
|
|
1481
|
|
|
1482 gcprolist = c->gcpro;
|
|
|
1483 backtrace_list = c->backlist;
|
|
|
1484 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1485
|
|
|
1486 throw_level = 0;
|
|
|
1487 LONGJMP (c->jmp, 1);
|
|
|
1488 }
|
|
|
1489
|
|
|
1490 static DOESNT_RETURN
|
|
|
1491 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1492 Lisp_Object sig, Lisp_Object data)
|
|
|
1493 {
|
|
|
1494 /* die if we recurse more than is reasonable */
|
|
|
1495 if (++throw_level > 20)
|
|
|
1496 abort();
|
|
|
1497
|
|
|
1498 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1499 "last resort" when there is no handler for this error and
|
|
|
1500 the debugger couldn't be invoked, so we are throwing to
|
|
|
1501 'top-level. If this tag doesn't exist (happens during the
|
|
|
1502 initialization stages) we would get in an infinite recursive
|
|
|
1503 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1504 really-early-error-handler.
|
|
|
1505
|
|
|
1506 Note that in fact the only time that the "last resort"
|
|
|
1507 occurs is when there's no catch for 'top-level -- the
|
|
|
1508 'top-level catch and the catch-all error handler are
|
|
|
1509 established at the same time, in initial_command_loop/
|
|
|
1510 top_level_1.
|
|
|
1511
|
|
|
1512 #### Fix this horrifitude!
|
|
|
1513 */
|
|
|
1514
|
|
|
1515 while (1)
|
|
|
1516 {
|
|
|
1517 REGISTER struct catchtag *c;
|
|
|
1518
|
|
|
1519 #if 0 /* FSFmacs */
|
|
|
1520 if (!NILP (tag)) /* #### */
|
|
|
1521 #endif
|
|
|
1522 for (c = catchlist; c; c = c->next)
|
|
|
1523 {
|
|
|
1524 if (EQ (c->tag, tag))
|
|
|
1525 unwind_to_catch (c, val);
|
|
|
1526 }
|
|
|
1527 if (!bomb_out_p)
|
|
|
1528 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1529 else
|
|
|
1530 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1531 }
|
|
|
1532
|
|
|
1533 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1534 /* throw_level--; */
|
|
|
1535 /* getting tired of compilation warnings */
|
|
|
1536 /* return Qnil; */
|
|
|
1537 }
|
|
|
1538
|
|
|
1539 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1540 Fthrow() works.
|
|
|
1541
|
|
|
1542 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1543 back to the appropriate condition-case handler after (maybe)
|
|
|
1544 the debugger is entered. In that case, TAG is the value
|
|
|
1545 of Vcondition_handlers that was in place just after the
|
|
|
1546 condition-case handler was set up. The car of this will be
|
|
|
1547 some data referring to the handler: Its car will be Qunbound
|
|
|
1548 (thus, this tag can never be generated by Lisp code), and
|
|
|
1549 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1550 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1551 This works fine because Fthrow() does not care what TAG was
|
|
|
1552 passed to it: it just looks up the catch list for something
|
|
|
1553 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1554 back to the place that established the catch (in this case,
|
|
|
1555 condition_case_1). See below for more info.
|
|
|
1556 */
|
|
|
1557
|
|
20
|
1558 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
0
|
1559 (throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
|
1560 Both TAG and VALUE are evalled.
|
|
20
|
1561 */
|
|
|
1562 (tag, val))
|
|
0
|
1563 {
|
|
|
1564 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1565 return Qnil;
|
|
|
1566 }
|
|
|
1567
|
|
20
|
1568 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1569 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1570 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1571 If BODYFORM completes normally, its value is returned
|
|
|
1572 after executing the UNWINDFORMS.
|
|
|
1573 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1574 */
|
|
|
1575 (args))
|
|
0
|
1576 {
|
|
|
1577 /* This function can GC */
|
|
|
1578 Lisp_Object val;
|
|
|
1579 int speccount = specpdl_depth_counter;
|
|
|
1580
|
|
|
1581 record_unwind_protect (Fprogn, Fcdr (args));
|
|
|
1582 val = Feval (Fcar (args));
|
|
|
1583 return unbind_to (speccount, val);
|
|
|
1584 }
|
|
|
1585
|
|
|
1586
|
|
|
1587 /**********************************************************************/
|
|
|
1588 /* Signalling and trapping errors */
|
|
|
1589 /**********************************************************************/
|
|
|
1590
|
|
|
1591 static Lisp_Object
|
|
|
1592 condition_bind_unwind (Lisp_Object loser)
|
|
|
1593 {
|
|
|
1594 struct Lisp_Cons *victim;
|
|
|
1595 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1596 Lisp_Object tem = XCAR (loser);
|
|
|
1597
|
|
|
1598 while (CONSP (tem))
|
|
|
1599 {
|
|
|
1600 victim = XCONS (tem);
|
|
|
1601 tem = victim->cdr;
|
|
|
1602 free_cons (victim);
|
|
|
1603 }
|
|
|
1604 victim = XCONS (loser);
|
|
|
1605
|
|
|
1606 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1607 Vcondition_handlers = victim->cdr;
|
|
|
1608
|
|
|
1609 free_cons (victim);
|
|
|
1610 return (Qnil);
|
|
|
1611 }
|
|
|
1612
|
|
|
1613 static Lisp_Object
|
|
|
1614 condition_case_unwind (Lisp_Object loser)
|
|
|
1615 {
|
|
|
1616 struct Lisp_Cons *victim;
|
|
|
1617
|
|
|
1618 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1619 victim = XCONS (XCAR (loser));
|
|
|
1620 free_cons (victim);
|
|
|
1621
|
|
|
1622 victim = XCONS (loser);
|
|
|
1623 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1624 Vcondition_handlers = victim->cdr;
|
|
|
1625
|
|
|
1626 free_cons (victim);
|
|
|
1627 return (Qnil);
|
|
|
1628 }
|
|
|
1629
|
|
|
1630 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1631 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1632
|
|
|
1633 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1634 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1635 HANDLERS as something to be caught, the return value of this
|
|
|
1636 function is the return value from BFUN. If such an error does
|
|
|
1637 occur, HFUN is called, and its return value becomes the
|
|
|
1638 return value of condition_case_1(). The second argument passed
|
|
|
1639 to HFUN will always be HARG. The first argument depends on
|
|
|
1640 HANDLERS:
|
|
|
1641
|
|
|
1642 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1643 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1644 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1645 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1646 `debug-on-error' was set.
|
|
|
1647
|
|
|
1648 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1649 debugger is invoked if `debug-on-error' was set.
|
|
|
1650
|
|
|
1651 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1652 exactly as in `condition-case', and errors will be trapped
|
|
|
1653 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1654 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1655 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1656
|
|
|
1657 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1658 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1659 for why), establishes a catch whose tag is this new value of
|
|
|
1660 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1661 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1662 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1663 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1664 jump point we just established, and we in turn just call the
|
|
|
1665 HFUN and return its value.
|
|
|
1666
|
|
|
1667 For a real condition-case, HFUN will always be
|
|
|
1668 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1669 to condition-case. That function just binds VAR to the cons
|
|
|
1670 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1671 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1672 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1673 it had *before* condition_case_1() was called. This maintains
|
|
|
1674 consistency (so that the state of things at exit of
|
|
|
1675 condition_case_1() is the same as at entry), and implies
|
|
|
1676 that the handler can signal the same error again (possibly
|
|
|
1677 after processing of its own), without getting in an infinite
|
|
|
1678 loop. */
|
|
|
1679
|
|
|
1680 Lisp_Object
|
|
|
1681 condition_case_1 (Lisp_Object handlers,
|
|
|
1682 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1683 Lisp_Object barg,
|
|
|
1684 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1685 Lisp_Object harg)
|
|
|
1686 {
|
|
|
1687 int speccount = specpdl_depth_counter;
|
|
|
1688 struct catchtag c;
|
|
|
1689 struct gcpro gcpro1;
|
|
|
1690
|
|
|
1691 #if 0 /* FSFmacs */
|
|
|
1692 c.tag = Qnil;
|
|
|
1693 #else
|
|
|
1694 /* Do consing now so out-of-memory error happens up front */
|
|
|
1695 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1696 which is known specially by Fsignal.
|
|
|
1697 This is an abomination, but to fix it would require either
|
|
|
1698 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1699 or changing the byte-compiler output (no thanks). */
|
|
|
1700 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1701 Vcondition_handlers);
|
|
|
1702 #endif
|
|
|
1703 c.val = Qnil;
|
|
|
1704 c.backlist = backtrace_list;
|
|
|
1705 #if 0 /* FSFmacs */
|
|
|
1706 /* #### */
|
|
|
1707 c.handlerlist = handlerlist;
|
|
|
1708 #endif
|
|
|
1709 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1710 c.pdlcount = specpdl_depth_counter;
|
|
|
1711 #if 0 /* FSFmacs */
|
|
|
1712 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1713 #endif
|
|
|
1714 c.gcpro = gcprolist;
|
|
|
1715 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1716 c.next = catchlist;
|
|
|
1717
|
|
|
1718 if (SETJMP (c.jmp))
|
|
|
1719 {
|
|
|
1720 /* throw does ungcpro, etc */
|
|
|
1721 return ((*hfun) (c.val, harg));
|
|
|
1722 }
|
|
|
1723
|
|
|
1724 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1725
|
|
|
1726 catchlist = &c;
|
|
|
1727 #if 0 /* FSFmacs */
|
|
|
1728 h.handler = handlers;
|
|
|
1729 h.var = Qnil;
|
|
|
1730 h.next = handlerlist;
|
|
|
1731 h.tag = &c;
|
|
|
1732 handlerlist = &h;
|
|
|
1733 #else
|
|
|
1734 Vcondition_handlers = c.tag;
|
|
|
1735 #endif
|
|
|
1736 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1737
|
|
|
1738 c.val = ((*bfun) (barg));
|
|
|
1739
|
|
|
1740 /* The following is *not* true: (ben)
|
|
|
1741
|
|
|
1742 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1743 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1744 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1745 UNGCPRO;
|
|
|
1746 catchlist = c.next;
|
|
|
1747 Vcondition_handlers = XCDR (c.tag);
|
|
|
1748
|
|
|
1749 return (unbind_to (speccount, c.val));
|
|
|
1750 }
|
|
|
1751
|
|
|
1752 static Lisp_Object
|
|
|
1753 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1754 {
|
|
|
1755 /* This function can GC */
|
|
|
1756 #if 0 /* FSFmacs */
|
|
|
1757 if (!NILP (h.var))
|
|
|
1758 specbind (h.var, c.val);
|
|
|
1759 val = Fprogn (Fcdr (h.chosen_clause));
|
|
|
1760
|
|
|
1761 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1762 longjumped to us unwound the stack to c.pdlcount before
|
|
|
1763 throwing. */
|
|
|
1764 unbind_to (c.pdlcount, Qnil);
|
|
|
1765 return val;
|
|
|
1766 #else
|
|
|
1767 int speccount;
|
|
|
1768
|
|
|
1769 if (NILP (var))
|
|
|
1770 return (Fprogn (Fcdr (val))); /* tailcall */
|
|
|
1771
|
|
|
1772 speccount = specpdl_depth_counter;
|
|
|
1773 specbind (var, Fcar (val));
|
|
|
1774 val = Fprogn (Fcdr (val));
|
|
|
1775 return unbind_to (speccount, val);
|
|
|
1776 #endif
|
|
|
1777 }
|
|
|
1778
|
|
|
1779 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1780 condition-case except that it takes three arguments rather
|
|
|
1781 than a single list of arguments. */
|
|
|
1782 Lisp_Object
|
|
|
1783 Fcondition_case_3 (Lisp_Object bodyform,
|
|
|
1784 Lisp_Object var, Lisp_Object handlers)
|
|
|
1785 {
|
|
|
1786 /* This function can GC */
|
|
|
1787 Lisp_Object val;
|
|
|
1788
|
|
|
1789 CHECK_SYMBOL (var);
|
|
|
1790
|
|
|
1791 for (val = handlers; ! NILP (val); val = Fcdr (val))
|
|
|
1792 {
|
|
|
1793 Lisp_Object tem;
|
|
|
1794 tem = Fcar (val);
|
|
|
1795 if ((!NILP (tem))
|
|
|
1796 && (!CONSP (tem)
|
|
|
1797 || (!SYMBOLP (XCAR (tem)) && !CONSP (XCAR (tem)))))
|
|
|
1798 signal_simple_error ("Invalid condition handler", tem);
|
|
|
1799 }
|
|
|
1800
|
|
|
1801 return condition_case_1 (handlers,
|
|
|
1802 Feval, bodyform,
|
|
|
1803 run_condition_case_handlers,
|
|
|
1804 var);
|
|
|
1805 }
|
|
|
1806
|
|
20
|
1807 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1808 Regain control when an error is signalled.
|
|
|
1809 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1810 executes BODYFORM and returns its value if no error happens.
|
|
|
1811 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1812 where the BODY is made of Lisp expressions.
|
|
|
1813
|
|
|
1814 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1815 error's condition names. If an error happens, the first applicable
|
|
|
1816 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1817 all errors, even those without the `error' condition name on them
|
|
|
1818 (e.g. `quit').
|
|
|
1819
|
|
|
1820 The car of a handler may be a list of condition names
|
|
|
1821 instead of a single condition name.
|
|
|
1822
|
|
|
1823 When a handler handles an error,
|
|
|
1824 control returns to the condition-case and the handler BODY... is executed
|
|
|
1825 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1826 VAR may be nil; then you do not get access to the signal information.
|
|
|
1827
|
|
|
1828 The value of the last BODY form is returned from the condition-case.
|
|
|
1829 See also the function `signal' for more info.
|
|
|
1830
|
|
|
1831 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1832 and the current catches, condition-cases, and bindings have all been
|
|
|
1833 popped back to the state they were in just before the call to
|
|
|
1834 `condition-case'. This means that resignalling the error from
|
|
|
1835 within the handler will not result in an infinite loop.
|
|
|
1836
|
|
|
1837 If you want to establish an error handler that is called with the
|
|
|
1838 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1839 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1840 */
|
|
70
|
1841 (args))
|
|
0
|
1842 {
|
|
|
1843 /* This function can GC */
|
|
|
1844 return Fcondition_case_3 (Fcar (Fcdr (args)),
|
|
|
1845 Fcar (args),
|
|
|
1846 Fcdr (Fcdr (args)));
|
|
|
1847 }
|
|
|
1848
|
|
20
|
1849 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1850 Regain control when an error is signalled, without popping the stack.
|
|
|
1851 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1852 This function is similar to `condition-case', but the handler is invoked
|
|
|
1853 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1854 that was current when `signal' was called, rather than when the handler
|
|
|
1855 was established.
|
|
|
1856
|
|
|
1857 HANDLER should be a function of one argument, which is a cons of the args
|
|
|
1858 (SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
|
1859 `signal' is called (this differs from `condition-case', which allows
|
|
|
1860 you to specify which errors are trapped). If the handler function
|
|
|
1861 returns, `signal' continues as if the handler were never invoked.
|
|
|
1862 (It continues to look for handlers established earlier than this one,
|
|
|
1863 and invokes the standard error-handler if none is found.)
|
|
20
|
1864 */
|
|
70
|
1865 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1866 {
|
|
|
1867 /* This function can GC */
|
|
|
1868 int speccount = specpdl_depth_counter;
|
|
|
1869 Lisp_Object tem;
|
|
|
1870
|
|
|
1871 /* #### If there were a way to check that args[0] were a function
|
|
|
1872 which accepted one arg, that should be done here ... */
|
|
|
1873
|
|
|
1874 /* (handler-fun . handler-args) */
|
|
|
1875 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1876 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1877 Vcondition_handlers = tem;
|
|
|
1878
|
|
|
1879 /* Caller should have GC-protected args */
|
|
|
1880 tem = Ffuncall (nargs - 1, args + 1);
|
|
|
1881 return (unbind_to (speccount, tem));
|
|
|
1882 }
|
|
|
1883
|
|
|
1884 static int
|
|
|
1885 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1886 {
|
|
|
1887 if (EQ (type, Qt))
|
|
|
1888 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1889 * Use with caution! */
|
|
|
1890 return (1);
|
|
|
1891 else
|
|
|
1892 {
|
|
|
1893 if (SYMBOLP (type))
|
|
|
1894 {
|
|
|
1895 return (!NILP (Fmemq (type, conditions)));
|
|
|
1896 }
|
|
|
1897 else if (CONSP (type))
|
|
|
1898 {
|
|
|
1899 while (CONSP (type))
|
|
|
1900 {
|
|
|
1901 if (!NILP (Fmemq (Fcar (type), conditions)))
|
|
|
1902 return 1;
|
|
|
1903 type = XCDR (type);
|
|
|
1904 }
|
|
|
1905 return 0;
|
|
|
1906 }
|
|
|
1907 else
|
|
|
1908 return 0;
|
|
|
1909 }
|
|
|
1910 }
|
|
|
1911
|
|
|
1912 static Lisp_Object
|
|
|
1913 return_from_signal (Lisp_Object value)
|
|
|
1914 {
|
|
|
1915 #if 1 /* RMS Claims: */
|
|
|
1916 /* Most callers are not prepared to handle gc if this
|
|
|
1917 returns. So, since this feature is not very useful,
|
|
|
1918 take it out. */
|
|
|
1919 /* Have called debugger; return value to signaller */
|
|
|
1920 return (value);
|
|
|
1921 #else /* But the reality is that that stinks, because: */
|
|
|
1922 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1923 to be continuable!! */
|
|
|
1924 error ("Returning a value from an error is no longer supported");
|
|
|
1925 #endif
|
|
|
1926 }
|
|
|
1927
|
|
|
1928 extern int in_display;
|
|
|
1929 extern int gc_in_progress;
|
|
|
1930
|
|
|
1931
|
|
|
1932 /****************** the workhorse error-signaling function ******************/
|
|
|
1933
|
|
|
1934 /* #### This function has not been synched with FSF. It diverges
|
|
|
1935 significantly. */
|
|
|
1936
|
|
|
1937 static Lisp_Object
|
|
|
1938 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1939 {
|
|
|
1940 /* This function can GC */
|
|
|
1941 struct gcpro gcpro1, gcpro2;
|
|
|
1942 Lisp_Object conditions;
|
|
|
1943 Lisp_Object handlers;
|
|
|
1944 /* signal_call_debugger() could get called more than once
|
|
|
1945 (once when a call-with-condition-handler is about to
|
|
|
1946 be dealt with, and another when a condition-case handler
|
|
|
1947 is about to be invoked). So make sure the debugger and/or
|
|
|
1948 stack trace aren't done more than once. */
|
|
|
1949 int stack_trace_displayed = 0;
|
|
|
1950 int debugger_entered = 0;
|
|
|
1951 GCPRO2 (conditions, handlers);
|
|
|
1952
|
|
|
1953 if (!initialized)
|
|
|
1954 {
|
|
|
1955 /* who knows how much has been initialized? Safest bet is
|
|
|
1956 just to bomb out immediately. */
|
|
|
1957 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1958 abort ();
|
|
|
1959 }
|
|
|
1960
|
|
|
1961 if (gc_in_progress || in_display)
|
|
|
1962 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1963 There is no sensible way to handle errors there. */
|
|
|
1964 abort ();
|
|
|
1965
|
|
|
1966 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1967
|
|
|
1968 for (handlers = Vcondition_handlers;
|
|
|
1969 CONSP (handlers);
|
|
|
1970 handlers = XCDR (handlers))
|
|
|
1971 {
|
|
|
1972 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1973 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1974 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1975
|
|
|
1976 if (!UNBOUNDP (handler_fun))
|
|
|
1977 {
|
|
|
1978 /* call-with-condition-handler */
|
|
|
1979 Lisp_Object tem;
|
|
|
1980 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1981 struct gcpro ngcpro1;
|
|
|
1982 NGCPRO1 (all_handlers);
|
|
|
1983 Vcondition_handlers = outer_handlers;
|
|
|
1984
|
|
|
1985 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1986 outer_handlers, 1,
|
|
|
1987 &stack_trace_displayed,
|
|
|
1988 &debugger_entered);
|
|
|
1989 if (!UNBOUNDP (tem))
|
|
|
1990 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1991
|
|
|
1992 tem = Fcons (sig, data);
|
|
|
1993 if (NILP (handler_data))
|
|
|
1994 tem = call1 (handler_fun, tem);
|
|
|
1995 else
|
|
|
1996 {
|
|
|
1997 /* (This code won't be used (for now?).) */
|
|
|
1998 struct gcpro nngcpro1;
|
|
|
1999 Lisp_Object args[3];
|
|
|
2000 NNGCPRO1 (args[0]);
|
|
|
2001 nngcpro1.nvars = 3;
|
|
|
2002 args[0] = handler_fun;
|
|
|
2003 args[1] = tem;
|
|
|
2004 args[2] = handler_data;
|
|
|
2005 nngcpro1.var = args;
|
|
|
2006 tem = Fapply (3, args);
|
|
|
2007 NNUNGCPRO;
|
|
|
2008 }
|
|
|
2009 NUNGCPRO;
|
|
|
2010 #if 0
|
|
|
2011 if (!EQ (tem, Qsignal))
|
|
|
2012 return (return_from_signal (tem));
|
|
|
2013 #endif
|
|
|
2014 /* If handler didn't throw, try another handler */
|
|
|
2015 Vcondition_handlers = all_handlers;
|
|
|
2016 }
|
|
|
2017
|
|
|
2018 /* It's a condition-case handler */
|
|
|
2019
|
|
|
2020 /* t is used by handlers for all conditions, set up by C code.
|
|
|
2021 * debugger is not called even if debug_on_error */
|
|
|
2022 else if (EQ (handler_data, Qt))
|
|
|
2023 {
|
|
|
2024 UNGCPRO;
|
|
|
2025 return (Fthrow (handlers, Fcons (sig, data)));
|
|
|
2026 }
|
|
|
2027 /* `error' is used similarly to the way `t' is used, but in
|
|
|
2028 addition it invokes the debugger if debug_on_error.
|
|
|
2029 This is normally used for the outer command-loop error
|
|
|
2030 handler. */
|
|
|
2031 else if (EQ (handler_data, Qerror))
|
|
|
2032 {
|
|
|
2033 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
2034 outer_handlers, 0,
|
|
|
2035 &stack_trace_displayed,
|
|
|
2036 &debugger_entered);
|
|
|
2037
|
|
|
2038 UNGCPRO;
|
|
|
2039 if (!UNBOUNDP (tem))
|
|
|
2040 return (return_from_signal (tem));
|
|
|
2041
|
|
|
2042 tem = Fcons (sig, data);
|
|
|
2043 return (Fthrow (handlers, tem));
|
|
|
2044 }
|
|
|
2045 else
|
|
|
2046 {
|
|
|
2047 /* handler established by real (Lisp) condition-case */
|
|
|
2048 Lisp_Object h;
|
|
|
2049
|
|
|
2050 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
2051 {
|
|
|
2052 Lisp_Object clause = Fcar (h);
|
|
|
2053 Lisp_Object tem = Fcar (clause);
|
|
|
2054
|
|
|
2055 if (condition_type_p (tem, conditions))
|
|
|
2056 {
|
|
|
2057 tem = signal_call_debugger (conditions, sig, data,
|
|
|
2058 outer_handlers, 1,
|
|
|
2059 &stack_trace_displayed,
|
|
|
2060 &debugger_entered);
|
|
|
2061 UNGCPRO;
|
|
|
2062 if (!UNBOUNDP (tem))
|
|
|
2063 return (return_from_signal (tem));
|
|
|
2064
|
|
|
2065 /* Doesn't return */
|
|
|
2066 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
|
2067 return (Fthrow (handlers, tem));
|
|
|
2068 }
|
|
|
2069 }
|
|
|
2070 }
|
|
|
2071 }
|
|
|
2072
|
|
|
2073 /* If no handler is present now, try to run the debugger,
|
|
|
2074 and if that fails, throw to top level.
|
|
|
2075
|
|
|
2076 #### The only time that no handler is present is during
|
|
|
2077 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
2078 there is no 'top-level catch. (That's why the
|
|
|
2079 "bomb-out" hack was added.)
|
|
|
2080
|
|
|
2081 #### Fix this horrifitude!
|
|
|
2082 */
|
|
|
2083 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
2084 &stack_trace_displayed,
|
|
|
2085 &debugger_entered);
|
|
|
2086 UNGCPRO;
|
|
|
2087 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2088 return Qnil;
|
|
|
2089 }
|
|
|
2090
|
|
|
2091
|
|
|
2092 /****************** Error functions class 1 ******************/
|
|
|
2093
|
|
|
2094 /* Class 1: General functions that signal an error.
|
|
|
2095 These functions take an error type and a list of associated error
|
|
|
2096 data. */
|
|
|
2097
|
|
|
2098 /* The simplest external error function: it would be called
|
|
|
2099 signal_continuable_error() in the terminology below, but it's
|
|
|
2100 Lisp-callable. */
|
|
|
2101
|
|
20
|
2102 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2103 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2104 An error symbol is a symbol defined using `define-error'.
|
|
|
2105 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2106 If the signal is handled, DATA is made available to the handler.
|
|
|
2107 See also the function `signal-error', and the functions to handle errors:
|
|
|
2108 `condition-case' and `call-with-condition-handler'.
|
|
|
2109
|
|
|
2110 Note that this function can return, if the debugger is invoked and the
|
|
|
2111 user invokes the "return from signal" option.
|
|
20
|
2112 */
|
|
|
2113 (error_symbol, data))
|
|
0
|
2114 {
|
|
|
2115 /* Fsignal() is one of these functions that's called all the time
|
|
|
2116 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2117 protect the objects because all sorts of weird stuff could
|
|
|
2118 happen. */
|
|
|
2119
|
|
|
2120 struct gcpro gcpro1;
|
|
|
2121
|
|
|
2122 GCPRO1 (data);
|
|
|
2123 if (!NILP (Vcurrent_error_state))
|
|
|
2124 {
|
|
|
2125 if (!NILP (Vcurrent_warning_class))
|
|
|
2126 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2127 Fcons (error_symbol, data));
|
|
|
2128 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2129 abort (); /* Better not get here! */
|
|
|
2130 }
|
|
|
2131 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2132 }
|
|
|
2133
|
|
|
2134 /* Signal a non-continuable error. */
|
|
|
2135
|
|
|
2136 DOESNT_RETURN
|
|
|
2137 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2138 {
|
|
|
2139 for (;;)
|
|
|
2140 Fsignal (sig, data);
|
|
|
2141 }
|
|
|
2142
|
|
|
2143 static Lisp_Object
|
|
|
2144 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2145 {
|
|
|
2146 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
74
|
2147 return (primitive_funcall ((lisp_fn_t) get_opaque_ptr (kludgy_args[0]),
|
|
|
2148 XINT (kludgy_args[1]), kludgy_args + 2));
|
|
0
|
2149 }
|
|
|
2150
|
|
|
2151 static Lisp_Object
|
|
|
2152 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2153 {
|
|
|
2154 Vcurrent_warning_class = warning_class;
|
|
|
2155 return Qnil;
|
|
|
2156 }
|
|
|
2157
|
|
|
2158 static Lisp_Object
|
|
|
2159 restore_current_error_state (Lisp_Object error_state)
|
|
|
2160 {
|
|
|
2161 Vcurrent_error_state = error_state;
|
|
|
2162 return Qnil;
|
|
|
2163 }
|
|
|
2164
|
|
|
2165 /* Many functions would like to do one of three things if an error
|
|
|
2166 occurs:
|
|
|
2167
|
|
|
2168 (1) signal the error, as usual.
|
|
|
2169 (2) silently fail and return some error value.
|
|
|
2170 (3) do as (2) but issue a warning in the process.
|
|
|
2171
|
|
|
2172 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2173 value and calls maybe_signal_error() and other such functions.
|
|
|
2174 This approach is inherently error-prone and broken. A much
|
|
|
2175 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2176 Wrap this around any function in which you might want errors
|
|
|
2177 to not be errors.
|
|
|
2178 */
|
|
|
2179
|
|
|
2180 Lisp_Object
|
|
74
|
2181 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval,
|
|
0
|
2182 Lisp_Object class, Error_behavior errb,
|
|
|
2183 int nargs, ...)
|
|
|
2184 {
|
|
|
2185 va_list vargs;
|
|
|
2186 int speccount;
|
|
|
2187 Lisp_Object kludgy_args[22];
|
|
|
2188 Lisp_Object *args = kludgy_args + 2;
|
|
|
2189 int i;
|
|
|
2190 Lisp_Object no_error;
|
|
|
2191
|
|
|
2192 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2193 assert (!NILP (class));
|
|
|
2194 assert (nargs >= 0 && nargs < 20);
|
|
|
2195
|
|
|
2196 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2197 already trapped, we leave them trapped.)
|
|
|
2198
|
|
|
2199 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2200
|
|
|
2201 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2202 were previously enabled. However, we never change the
|
|
|
2203 warning class from one to another. */
|
|
|
2204 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2205 {
|
|
|
2206 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2207 class = Qnil;
|
|
|
2208 errb = ERROR_ME_NOT;
|
|
|
2209 no_error = Qt;
|
|
|
2210 }
|
|
|
2211 else
|
|
|
2212 no_error = Qnil;
|
|
|
2213
|
|
|
2214 va_start (vargs, nargs);
|
|
|
2215 for (i = 0; i < nargs; i++)
|
|
|
2216 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2217 va_end (vargs);
|
|
|
2218
|
|
|
2219 /* If error-checking is not disabled, just call the function.
|
|
|
2220 It's important not to override disabled error-checking with
|
|
|
2221 enabled error-checking. */
|
|
|
2222
|
|
|
2223 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
2224 return primitive_funcall (fun, nargs, args);
|
|
|
2225
|
|
|
2226 speccount = specpdl_depth ();
|
|
|
2227 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2228 {
|
|
|
2229 /* If we're currently calling for no warnings, then make it so.
|
|
|
2230 If we're currently calling for warnings and we weren't
|
|
|
2231 previously, then set our warning class; otherwise, leave
|
|
|
2232 the existing one alone. */
|
|
|
2233 record_unwind_protect (restore_current_warning_class,
|
|
|
2234 Vcurrent_warning_class);
|
|
|
2235 Vcurrent_warning_class = class;
|
|
|
2236 }
|
|
|
2237 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2238 {
|
|
|
2239 record_unwind_protect (restore_current_error_state,
|
|
|
2240 Vcurrent_error_state);
|
|
|
2241 Vcurrent_error_state = no_error;
|
|
|
2242 }
|
|
|
2243
|
|
|
2244 {
|
|
|
2245 int threw;
|
|
|
2246 Lisp_Object the_retval;
|
|
|
2247 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2248 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2249 struct gcpro gcpro1, gcpro2;
|
|
|
2250
|
|
|
2251 GCPRO2 (opaque1, opaque2);
|
|
|
2252 kludgy_args[0] = opaque2;
|
|
|
2253 kludgy_args[1] = make_int (nargs);
|
|
|
2254 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2255 call_with_suspended_errors_1,
|
|
|
2256 opaque1, &threw);
|
|
|
2257 free_opaque_ptr (opaque1);
|
|
|
2258 free_opaque_ptr (opaque2);
|
|
|
2259 UNGCPRO;
|
|
|
2260 /* Use the returned value except in non-local exit, when
|
|
|
2261 RETVAL applies. */
|
|
|
2262 if (!threw)
|
|
|
2263 retval = the_retval;
|
|
|
2264 return unbind_to (speccount, retval);
|
|
|
2265 }
|
|
|
2266 }
|
|
|
2267
|
|
|
2268 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2269 according to ERRB. CLASS is the class of warning and should
|
|
|
2270 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2271 Qresource, etc.). */
|
|
|
2272
|
|
|
2273 void
|
|
|
2274 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2275 Error_behavior errb)
|
|
|
2276 {
|
|
|
2277 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2278 return;
|
|
|
2279 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2280 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2281 else
|
|
|
2282 for (;;)
|
|
|
2283 Fsignal (sig, data);
|
|
|
2284 }
|
|
|
2285
|
|
|
2286 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2287 according to ERRB. */
|
|
|
2288
|
|
|
2289 Lisp_Object
|
|
|
2290 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2291 Lisp_Object class, Error_behavior errb)
|
|
|
2292 {
|
|
|
2293 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2294 return Qnil;
|
|
|
2295 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2296 {
|
|
|
2297 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2298 return Qnil;
|
|
|
2299 }
|
|
|
2300 else
|
|
|
2301 return Fsignal (sig, data);
|
|
|
2302 }
|
|
|
2303
|
|
|
2304
|
|
|
2305 /****************** Error functions class 2 ******************/
|
|
|
2306
|
|
|
2307 /* Class 2: Printf-like functions that signal an error.
|
|
|
2308 These functions signal an error of type Qerror, whose data
|
|
|
2309 is a single string, created using the arguments. */
|
|
|
2310
|
|
|
2311 /* dump an error message; called like printf */
|
|
|
2312
|
|
|
2313 DOESNT_RETURN
|
|
|
2314 error (CONST char *fmt, ...)
|
|
|
2315 {
|
|
|
2316 Lisp_Object obj;
|
|
|
2317 va_list args;
|
|
|
2318
|
|
|
2319 va_start (args, fmt);
|
|
|
2320 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2321 args);
|
|
|
2322 va_end (args);
|
|
|
2323
|
|
|
2324 /* Fsignal GC-protects its args */
|
|
|
2325 signal_error (Qerror, list1 (obj));
|
|
|
2326 }
|
|
|
2327
|
|
|
2328 void
|
|
|
2329 maybe_error (Lisp_Object class, Error_behavior errb, CONST char *fmt, ...)
|
|
|
2330 {
|
|
|
2331 Lisp_Object obj;
|
|
|
2332 va_list args;
|
|
|
2333
|
|
|
2334 /* Optimization: */
|
|
|
2335 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2336 return;
|
|
|
2337
|
|
|
2338 va_start (args, fmt);
|
|
|
2339 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2340 args);
|
|
|
2341 va_end (args);
|
|
|
2342
|
|
|
2343 /* Fsignal GC-protects its args */
|
|
|
2344 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2345 }
|
|
|
2346
|
|
|
2347 Lisp_Object
|
|
|
2348 continuable_error (CONST char *fmt, ...)
|
|
|
2349 {
|
|
|
2350 Lisp_Object obj;
|
|
|
2351 va_list args;
|
|
|
2352
|
|
|
2353 va_start (args, fmt);
|
|
|
2354 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2355 args);
|
|
|
2356 va_end (args);
|
|
|
2357
|
|
|
2358 /* Fsignal GC-protects its args */
|
|
|
2359 return Fsignal (Qerror, list1 (obj));
|
|
|
2360 }
|
|
|
2361
|
|
|
2362 Lisp_Object
|
|
|
2363 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
|
2364 CONST char *fmt, ...)
|
|
|
2365 {
|
|
|
2366 Lisp_Object obj;
|
|
|
2367 va_list args;
|
|
|
2368
|
|
|
2369 /* Optimization: */
|
|
|
2370 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2371 return Qnil;
|
|
|
2372
|
|
|
2373 va_start (args, fmt);
|
|
|
2374 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2375 args);
|
|
|
2376 va_end (args);
|
|
|
2377
|
|
|
2378 /* Fsignal GC-protects its args */
|
|
|
2379 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2380 }
|
|
|
2381
|
|
|
2382
|
|
|
2383 /****************** Error functions class 3 ******************/
|
|
|
2384
|
|
|
2385 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2386 These functions signal an error of type Qerror, whose data
|
|
|
2387 is two objects, a string and a related Lisp object (usually the object
|
|
|
2388 where the error is occurring). */
|
|
|
2389
|
|
|
2390 DOESNT_RETURN
|
|
|
2391 signal_simple_error (CONST char *reason, Lisp_Object frob)
|
|
|
2392 {
|
|
|
2393 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2394 }
|
|
|
2395
|
|
|
2396 void
|
|
|
2397 maybe_signal_simple_error (CONST char *reason, Lisp_Object frob,
|
|
|
2398 Lisp_Object class, Error_behavior errb)
|
|
|
2399 {
|
|
|
2400 /* Optimization: */
|
|
|
2401 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2402 return;
|
|
|
2403 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2404 class, errb);
|
|
|
2405 }
|
|
|
2406
|
|
|
2407 Lisp_Object
|
|
|
2408 signal_simple_continuable_error (CONST char *reason, Lisp_Object frob)
|
|
|
2409 {
|
|
|
2410 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2411 }
|
|
|
2412
|
|
|
2413 Lisp_Object
|
|
|
2414 maybe_signal_simple_continuable_error (CONST char *reason, Lisp_Object frob,
|
|
|
2415 Lisp_Object class, Error_behavior errb)
|
|
|
2416 {
|
|
|
2417 /* Optimization: */
|
|
|
2418 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2419 return Qnil;
|
|
|
2420 return maybe_signal_continuable_error
|
|
|
2421 (Qerror, list2 (build_translated_string (reason),
|
|
|
2422 frob), class, errb);
|
|
|
2423 }
|
|
|
2424
|
|
|
2425
|
|
|
2426 /****************** Error functions class 4 ******************/
|
|
|
2427
|
|
|
2428 /* Class 4: Printf-like functions that signal an error.
|
|
|
2429 These functions signal an error of type Qerror, whose data
|
|
|
2430 is a two objects, a string (created using the arguments) and a
|
|
|
2431 Lisp object.
|
|
|
2432 */
|
|
|
2433
|
|
|
2434 DOESNT_RETURN
|
|
|
2435 error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2436 {
|
|
|
2437 Lisp_Object obj;
|
|
|
2438 va_list args;
|
|
|
2439
|
|
|
2440 va_start (args, fmt);
|
|
|
2441 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2442 args);
|
|
|
2443 va_end (args);
|
|
|
2444
|
|
|
2445 /* Fsignal GC-protects its args */
|
|
|
2446 signal_error (Qerror, list2 (obj, frob));
|
|
|
2447 }
|
|
|
2448
|
|
|
2449 void
|
|
|
2450 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2451 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2452 {
|
|
|
2453 Lisp_Object obj;
|
|
|
2454 va_list args;
|
|
|
2455
|
|
|
2456 /* Optimization: */
|
|
|
2457 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2458 return;
|
|
|
2459
|
|
|
2460 va_start (args, fmt);
|
|
|
2461 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2462 args);
|
|
|
2463 va_end (args);
|
|
|
2464
|
|
|
2465 /* Fsignal GC-protects its args */
|
|
|
2466 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2467 }
|
|
|
2468
|
|
|
2469 Lisp_Object
|
|
|
2470 continuable_error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2471 {
|
|
|
2472 Lisp_Object obj;
|
|
|
2473 va_list args;
|
|
|
2474
|
|
|
2475 va_start (args, fmt);
|
|
|
2476 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2477 args);
|
|
|
2478 va_end (args);
|
|
|
2479
|
|
|
2480 /* Fsignal GC-protects its args */
|
|
|
2481 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2482 }
|
|
|
2483
|
|
|
2484 Lisp_Object
|
|
|
2485 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2486 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2487 {
|
|
|
2488 Lisp_Object obj;
|
|
|
2489 va_list args;
|
|
|
2490
|
|
|
2491 /* Optimization: */
|
|
|
2492 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2493 return Qnil;
|
|
|
2494
|
|
|
2495 va_start (args, fmt);
|
|
|
2496 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2497 args);
|
|
|
2498 va_end (args);
|
|
|
2499
|
|
|
2500 /* Fsignal GC-protects its args */
|
|
|
2501 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2502 class, errb);
|
|
|
2503 }
|
|
|
2504
|
|
|
2505
|
|
|
2506 /****************** Error functions class 5 ******************/
|
|
|
2507
|
|
|
2508 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2509 These functions signal an error of type Qerror, whose data
|
|
|
2510 is three objects, a string and two related Lisp objects. */
|
|
|
2511
|
|
|
2512 DOESNT_RETURN
|
|
|
2513 signal_simple_error_2 (CONST char *reason,
|
|
|
2514 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2515 {
|
|
|
2516 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2517 frob1));
|
|
|
2518 }
|
|
|
2519
|
|
|
2520 void
|
|
|
2521 maybe_signal_simple_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2522 Lisp_Object frob1, Lisp_Object class,
|
|
|
2523 Error_behavior errb)
|
|
|
2524 {
|
|
|
2525 /* Optimization: */
|
|
|
2526 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2527 return;
|
|
|
2528 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2529 frob1), class, errb);
|
|
|
2530 }
|
|
|
2531
|
|
|
2532
|
|
|
2533 Lisp_Object
|
|
|
2534 signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2535 Lisp_Object frob1)
|
|
|
2536 {
|
|
|
2537 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2538 frob1));
|
|
|
2539 }
|
|
|
2540
|
|
|
2541 Lisp_Object
|
|
|
2542 maybe_signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2543 Lisp_Object frob1, Lisp_Object class,
|
|
|
2544 Error_behavior errb)
|
|
|
2545 {
|
|
|
2546 /* Optimization: */
|
|
|
2547 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2548 return Qnil;
|
|
|
2549 return maybe_signal_continuable_error
|
|
|
2550 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2551 frob1),
|
|
|
2552 class, errb);
|
|
|
2553 }
|
|
|
2554
|
|
|
2555
|
|
|
2556 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2557 void
|
|
|
2558 signal_quit (void)
|
|
|
2559 {
|
|
|
2560 /* This function can GC */
|
|
|
2561 if (EQ (Vquit_flag, Qcritical))
|
|
|
2562 debug_on_quit |= 2; /* set critical bit. */
|
|
|
2563 Vquit_flag = Qnil;
|
|
|
2564 /* note that this is continuable. */
|
|
|
2565 Fsignal (Qquit, Qnil);
|
|
|
2566 }
|
|
|
2567
|
|
|
2568
|
|
149
|
2569 DEFUN ("strerror", Fstrerror, 1, 1, 0, /*
|
|
|
2570 Return the error string associated with integer ERRNUM.
|
|
|
2571 This function is an interface to strerror(3).
|
|
|
2572 The returned string may or may not be translated.
|
|
|
2573 */
|
|
|
2574 (errnum))
|
|
|
2575 {
|
|
|
2576 CHECK_INT (errnum);
|
|
|
2577 return build_ext_string (strerror (XINT (errnum)), FORMAT_NATIVE);
|
|
|
2578 }
|
|
|
2579
|
|
|
2580
|
|
0
|
2581 /**********************************************************************/
|
|
|
2582 /* User commands */
|
|
|
2583 /**********************************************************************/
|
|
|
2584
|
|
20
|
2585 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
0
|
2586 T if FUNCTION makes provisions for interactive calling.
|
|
|
2587 This means it contains a description for how to read arguments to give it.
|
|
|
2588 The value is nil for an invalid function or a symbol with no function
|
|
|
2589 definition.
|
|
|
2590
|
|
|
2591 Interactively callable functions include
|
|
|
2592
|
|
|
2593 -- strings and vectors (treated as keyboard macros)
|
|
|
2594 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2595 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2596 (i.e. the interactive flag)
|
|
|
2597 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2598 value
|
|
|
2599 -- subrs (built-in functions) that are interactively callable
|
|
|
2600
|
|
|
2601 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2602 */
|
|
|
2603 (function))
|
|
0
|
2604 {
|
|
|
2605 REGISTER Lisp_Object fun;
|
|
|
2606 REGISTER Lisp_Object funcar;
|
|
|
2607
|
|
|
2608 fun = function;
|
|
|
2609
|
|
|
2610 fun = indirect_function (fun, 0);
|
|
|
2611 if (UNBOUNDP (fun))
|
|
|
2612 return Qnil;
|
|
|
2613
|
|
|
2614 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2615 interactive spec. */
|
|
|
2616 if (SUBRP (fun))
|
|
149
|
2617 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2618
|
|
|
2619 if (COMPILED_FUNCTIONP (fun))
|
|
|
2620 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
0
|
2621
|
|
|
2622 /* Strings and vectors are keyboard macros. */
|
|
|
2623 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2624 return Qt;
|
|
|
2625
|
|
|
2626 /* Lists may represent commands. */
|
|
|
2627 if (!CONSP (fun))
|
|
|
2628 return Qnil;
|
|
|
2629 funcar = Fcar (fun);
|
|
|
2630 if (!SYMBOLP (funcar))
|
|
|
2631 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
2632 if (EQ (funcar, Qlambda))
|
|
|
2633 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2634 if (EQ (funcar, Qautoload))
|
|
|
2635 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2636 else
|
|
|
2637 return Qnil;
|
|
|
2638 }
|
|
|
2639
|
|
20
|
2640 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2641 Execute CMD as an editor command.
|
|
|
2642 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2643 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2644 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2645 when reading the arguments.
|
|
20
|
2646 */
|
|
|
2647 (cmd, record, keys))
|
|
0
|
2648 {
|
|
|
2649 /* This function can GC */
|
|
|
2650 Lisp_Object prefixarg;
|
|
|
2651 Lisp_Object final = cmd;
|
|
|
2652 struct backtrace backtrace;
|
|
|
2653 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2654
|
|
|
2655 prefixarg = con->prefix_arg;
|
|
|
2656 con->prefix_arg = Qnil;
|
|
|
2657 Vcurrent_prefix_arg = prefixarg;
|
|
|
2658 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2659
|
|
|
2660 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2661 return run_hook (Vdisabled_command_hook);
|
|
|
2662
|
|
|
2663 for (;;)
|
|
|
2664 {
|
|
|
2665 final = indirect_function (cmd, 1);
|
|
|
2666 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2667 do_autoload (final, cmd);
|
|
|
2668 else
|
|
|
2669 break;
|
|
|
2670 }
|
|
|
2671
|
|
|
2672 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2673 {
|
|
|
2674 #ifdef EMACS_BTL
|
|
|
2675 backtrace.id_number = 0;
|
|
|
2676 #endif
|
|
|
2677 backtrace.function = &Qcall_interactively;
|
|
|
2678 backtrace.args = &cmd;
|
|
|
2679 backtrace.nargs = 1;
|
|
|
2680 backtrace.evalargs = 0;
|
|
|
2681 backtrace.pdlcount = specpdl_depth ();
|
|
|
2682 backtrace.debug_on_exit = 0;
|
|
116
|
2683 PUSH_BACKTRACE (backtrace);
|
|
0
|
2684
|
|
|
2685 final = Fcall_interactively (cmd, record, keys);
|
|
|
2686
|
|
116
|
2687 POP_BACKTRACE (backtrace);
|
|
0
|
2688 return (final);
|
|
|
2689 }
|
|
|
2690 else if (STRINGP (final) || VECTORP (final))
|
|
|
2691 {
|
|
|
2692 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2693 }
|
|
|
2694 else
|
|
|
2695 {
|
|
|
2696 Fsignal (Qwrong_type_argument,
|
|
|
2697 Fcons (Qcommandp,
|
|
|
2698 ((EQ (cmd, final))
|
|
|
2699 ? list1 (cmd)
|
|
|
2700 : list2 (cmd, final))));
|
|
|
2701 return Qnil;
|
|
|
2702 }
|
|
|
2703 }
|
|
|
2704
|
|
20
|
2705 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2706 Return t if function in which this appears was called interactively.
|
|
|
2707 This means that the function was called with call-interactively (which
|
|
|
2708 includes being called as the binding of a key)
|
|
|
2709 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2710 */
|
|
|
2711 ())
|
|
0
|
2712 {
|
|
|
2713 REGISTER struct backtrace *btp;
|
|
|
2714 REGISTER Lisp_Object fun;
|
|
|
2715
|
|
|
2716 if (!INTERACTIVE)
|
|
|
2717 return Qnil;
|
|
|
2718
|
|
|
2719 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2720 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2721 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2722 compiled function. */
|
|
|
2723 btp = backtrace_list;
|
|
|
2724
|
|
|
2725 #if 0 /* FSFmacs */
|
|
|
2726
|
|
|
2727 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2728 out which one is more correct. */
|
|
|
2729 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2730 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2731 fun = Findirect_function (*btp->function);
|
|
|
2732 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2733 btp = btp->next;
|
|
|
2734
|
|
|
2735 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2736 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2737 definition, this function isn't really being called
|
|
|
2738 interactively, but because that's the way Emacs 18 always builds
|
|
|
2739 byte-compiled functions, we'll accept it for now. */
|
|
|
2740 if (EQ (*btp->function, Qbyte_code))
|
|
|
2741 btp = btp->next;
|
|
|
2742
|
|
|
2743 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2744 looking at several frames for special forms. Skip past them. */
|
|
|
2745 while (btp &&
|
|
|
2746 btp->nargs == UNEVALLED)
|
|
|
2747 btp = btp->next;
|
|
|
2748
|
|
|
2749 #else
|
|
|
2750
|
|
|
2751 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2752 btp = btp->next;
|
|
|
2753 for (;
|
|
|
2754 btp && (btp->nargs == UNEVALLED
|
|
|
2755 || EQ (*btp->function, Qbyte_code));
|
|
|
2756 btp = btp->next)
|
|
|
2757 {}
|
|
|
2758 /* btp now points at the frame of the innermost function
|
|
|
2759 that DOES eval its args.
|
|
|
2760 If it is a built-in function (such as load or eval-region)
|
|
|
2761 return nil. */
|
|
|
2762 /* Beats me why this is necessary, but it is */
|
|
|
2763 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2764 return Qt;
|
|
|
2765
|
|
|
2766 #endif
|
|
|
2767
|
|
|
2768 fun = Findirect_function (*btp->function);
|
|
|
2769 if (SUBRP (fun))
|
|
|
2770 return Qnil;
|
|
|
2771 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2772 Return t if that function was called interactively. */
|
|
|
2773 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2774 return Qt;
|
|
|
2775 return Qnil;
|
|
|
2776 }
|
|
|
2777
|
|
|
2778
|
|
|
2779 /**********************************************************************/
|
|
|
2780 /* Autoloading */
|
|
|
2781 /**********************************************************************/
|
|
|
2782
|
|
20
|
2783 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2784 Define FUNCTION to autoload from FILE.
|
|
|
2785 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2786 Third arg DOCSTRING is documentation for the function.
|
|
|
2787 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2788 Fifth arg TYPE indicates the type of the object:
|
|
|
2789 nil or omitted says FUNCTION is a function,
|
|
|
2790 `keymap' says FUNCTION is really a keymap, and
|
|
|
2791 `macro' or t says FUNCTION is really a macro.
|
|
|
2792 Third through fifth args give info about the real definition.
|
|
|
2793 They default to nil.
|
|
|
2794 If FUNCTION is already defined other than as an autoload,
|
|
|
2795 this does nothing and returns nil.
|
|
20
|
2796 */
|
|
|
2797 (function, file, docstring, interactive, type))
|
|
0
|
2798 {
|
|
|
2799 /* This function can GC */
|
|
|
2800 CHECK_SYMBOL (function);
|
|
|
2801 CHECK_STRING (file);
|
|
|
2802
|
|
|
2803 /* If function is defined and not as an autoload, don't override */
|
|
|
2804 if (!UNBOUNDP (XSYMBOL (function)->function)
|
|
|
2805 && !(CONSP (XSYMBOL (function)->function)
|
|
|
2806 && EQ (XCAR (XSYMBOL (function)->function), Qautoload)))
|
|
|
2807 return Qnil;
|
|
|
2808
|
|
|
2809 if (purify_flag)
|
|
|
2810 {
|
|
|
2811 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2812 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2813 }
|
|
|
2814
|
|
|
2815 return Ffset (function,
|
|
|
2816 Fpurecopy (Fcons (Qautoload, list4 (file,
|
|
|
2817 docstring,
|
|
|
2818 interactive,
|
|
|
2819 type))));
|
|
|
2820 }
|
|
|
2821
|
|
|
2822 Lisp_Object
|
|
|
2823 un_autoload (Lisp_Object oldqueue)
|
|
|
2824 {
|
|
|
2825 /* This function can GC */
|
|
|
2826 REGISTER Lisp_Object queue, first, second;
|
|
|
2827
|
|
|
2828 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2829 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2830 queue = Vautoload_queue;
|
|
|
2831 Vautoload_queue = oldqueue;
|
|
|
2832 while (CONSP (queue))
|
|
|
2833 {
|
|
|
2834 first = Fcar (queue);
|
|
|
2835 second = Fcdr (first);
|
|
|
2836 first = Fcar (first);
|
|
|
2837 if (NILP (second))
|
|
|
2838 Vfeatures = first;
|
|
|
2839 else
|
|
|
2840 Ffset (first, second);
|
|
|
2841 queue = Fcdr (queue);
|
|
|
2842 }
|
|
|
2843 return Qnil;
|
|
|
2844 }
|
|
|
2845
|
|
|
2846 void
|
|
|
2847 do_autoload (Lisp_Object fundef,
|
|
|
2848 Lisp_Object funname)
|
|
|
2849 {
|
|
|
2850 /* This function can GC */
|
|
|
2851 int speccount = specpdl_depth_counter;
|
|
|
2852 Lisp_Object fun = funname;
|
|
|
2853 struct gcpro gcpro1, gcpro2;
|
|
|
2854
|
|
|
2855 CHECK_SYMBOL (funname);
|
|
|
2856 GCPRO2 (fun, funname);
|
|
|
2857
|
|
|
2858 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2859 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2860 Vautoload_queue = Qt;
|
|
|
2861 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil,
|
|
|
2862 Qnil);
|
|
|
2863
|
|
|
2864 {
|
|
|
2865 Lisp_Object queue = Vautoload_queue;
|
|
|
2866
|
|
|
2867 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
2868 queue = Vautoload_queue;
|
|
|
2869 while (CONSP (queue))
|
|
|
2870 {
|
|
|
2871 Lisp_Object first = Fcar (queue);
|
|
|
2872 Lisp_Object second = Fcdr (first);
|
|
|
2873
|
|
|
2874 first = Fcar (first);
|
|
|
2875
|
|
|
2876 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2877 may be an atom if the autoload entry was generated by a defalias
|
|
|
2878 or fset. */
|
|
|
2879 if (CONSP (second))
|
|
|
2880 Fput (first, Qautoload, (Fcdr (second)));
|
|
|
2881
|
|
|
2882 queue = Fcdr (queue);
|
|
|
2883 }
|
|
|
2884 }
|
|
|
2885
|
|
|
2886 /* Once loading finishes, don't undo it. */
|
|
|
2887 Vautoload_queue = Qt;
|
|
|
2888 unbind_to (speccount, Qnil);
|
|
|
2889
|
|
|
2890 fun = indirect_function (fun, 0);
|
|
|
2891
|
|
|
2892 #if 0 /* FSFmacs */
|
|
|
2893 if (!NILP (Fequal (fun, fundef)))
|
|
|
2894 #else
|
|
|
2895 if (UNBOUNDP (fun)
|
|
|
2896 || (CONSP (fun)
|
|
|
2897 && EQ (XCAR (fun), Qautoload)))
|
|
|
2898 #endif
|
|
|
2899 error ("Autoloading failed to define function %s",
|
|
|
2900 string_data (XSYMBOL (funname)->name));
|
|
|
2901 UNGCPRO;
|
|
|
2902 }
|
|
|
2903
|
|
|
2904
|
|
|
2905 /**********************************************************************/
|
|
|
2906 /* eval, funcall, apply */
|
|
|
2907 /**********************************************************************/
|
|
|
2908
|
|
|
2909 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
|
2910 int nargs, Lisp_Object args[]);
|
|
|
2911 static Lisp_Object apply_lambda (Lisp_Object fun,
|
|
|
2912 int nargs, Lisp_Object args);
|
|
|
2913 static Lisp_Object funcall_subr (struct Lisp_Subr *sub, Lisp_Object args[]);
|
|
|
2914
|
|
|
2915 static int in_warnings;
|
|
|
2916
|
|
|
2917 static Lisp_Object
|
|
|
2918 in_warnings_restore (Lisp_Object minimus)
|
|
|
2919 {
|
|
|
2920 in_warnings = 0;
|
|
|
2921 return Qnil;
|
|
|
2922 }
|
|
|
2923
|
|
|
2924
|
|
20
|
2925 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2926 Evaluate FORM and return its value.
|
|
20
|
2927 */
|
|
|
2928 (form))
|
|
0
|
2929 {
|
|
|
2930 /* This function can GC */
|
|
|
2931 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2932 int nargs;
|
|
|
2933 struct backtrace backtrace;
|
|
|
2934
|
|
|
2935 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2936 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2937 {
|
|
|
2938 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
2939 int speccount = specpdl_depth ();
|
|
|
2940 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2941
|
|
|
2942 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2943 in_warnings = 1;
|
|
|
2944 this_warning_cons = Vpending_warnings;
|
|
|
2945 this_warning = XCAR (this_warning_cons);
|
|
|
2946 /* in case an error occurs in the warn function, at least
|
|
|
2947 it won't happen infinitely */
|
|
|
2948 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2949 free_cons (XCONS (this_warning_cons));
|
|
|
2950 class = XCAR (this_warning);
|
|
|
2951 level = XCAR (XCDR (this_warning));
|
|
|
2952 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2953 free_list (this_warning);
|
|
|
2954
|
|
|
2955 if (NILP (Vpending_warnings))
|
|
|
2956 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2957 but safer */
|
|
|
2958
|
|
|
2959 GCPRO4 (form, class, level, messij);
|
|
|
2960 if (!STRINGP (messij))
|
|
|
2961 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2962 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2963 UNGCPRO;
|
|
|
2964 unbind_to (speccount, Qnil);
|
|
|
2965 }
|
|
|
2966
|
|
|
2967 if (!CONSP (form))
|
|
|
2968 {
|
|
|
2969 if (!SYMBOLP (form))
|
|
|
2970 return form;
|
|
|
2971
|
|
|
2972 val = Fsymbol_value (form);
|
|
|
2973
|
|
|
2974 return val;
|
|
|
2975 }
|
|
|
2976
|
|
|
2977 QUIT;
|
|
|
2978 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2979 {
|
|
|
2980 struct gcpro gcpro1;
|
|
|
2981 GCPRO1 (form);
|
|
|
2982 garbage_collect_1 ();
|
|
|
2983 UNGCPRO;
|
|
|
2984 }
|
|
|
2985
|
|
|
2986 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2987 {
|
|
|
2988 if (max_lisp_eval_depth < 100)
|
|
|
2989 max_lisp_eval_depth = 100;
|
|
|
2990 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2991 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2992 }
|
|
|
2993
|
|
|
2994 original_fun = Fcar (form);
|
|
|
2995 original_args = Fcdr (form);
|
|
|
2996 nargs = XINT (Flength (original_args));
|
|
|
2997
|
|
|
2998 #ifdef EMACS_BTL
|
|
|
2999 backtrace.id_number = 0;
|
|
|
3000 #endif
|
|
|
3001 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
3002 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
3003 backtrace.args = &original_args;
|
|
|
3004 backtrace.nargs = UNEVALLED;
|
|
|
3005 backtrace.evalargs = 1;
|
|
|
3006 backtrace.debug_on_exit = 0;
|
|
116
|
3007 PUSH_BACKTRACE (backtrace);
|
|
0
|
3008
|
|
|
3009 if (debug_on_next_call)
|
|
|
3010 do_debug_on_call (Qt);
|
|
|
3011
|
|
|
3012 /* At this point, only original_fun and original_args
|
|
|
3013 have values that will be used below */
|
|
|
3014 retry:
|
|
|
3015 fun = indirect_function (original_fun, 1);
|
|
|
3016
|
|
|
3017 if (SUBRP (fun))
|
|
|
3018 {
|
|
|
3019 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3020 int max_args = subr->max_args;
|
|
|
3021 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
3022 Lisp_Object args_left;
|
|
|
3023 REGISTER int i;
|
|
|
3024
|
|
|
3025 args_left = original_args;
|
|
|
3026
|
|
|
3027 if (nargs < subr->min_args
|
|
|
3028 || (max_args >= 0 && max_args < nargs))
|
|
|
3029 {
|
|
|
3030 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3031 list2 (fun, make_int (nargs)));
|
|
|
3032 }
|
|
|
3033
|
|
|
3034 if (max_args == UNEVALLED)
|
|
|
3035 {
|
|
|
3036 backtrace.evalargs = 0;
|
|
|
3037 val = ((subr_function (subr)) (args_left));
|
|
|
3038 }
|
|
|
3039
|
|
|
3040 else if (max_args == MANY)
|
|
|
3041 {
|
|
|
3042 /* Pass a vector of evaluated arguments */
|
|
|
3043 Lisp_Object *vals;
|
|
|
3044 REGISTER int argnum;
|
|
|
3045 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3046
|
|
|
3047 vals = (Lisp_Object *) alloca (nargs * sizeof (Lisp_Object));
|
|
|
3048
|
|
|
3049 GCPRO3 (args_left, fun, vals[0]);
|
|
|
3050 gcpro3.nvars = 0;
|
|
|
3051
|
|
|
3052 argnum = 0;
|
|
|
3053 while (!NILP (args_left))
|
|
|
3054 {
|
|
|
3055 vals[argnum++] = Feval (Fcar (args_left));
|
|
|
3056 args_left = Fcdr (args_left);
|
|
|
3057 gcpro3.nvars = argnum;
|
|
|
3058 }
|
|
|
3059
|
|
|
3060 backtrace.args = vals;
|
|
|
3061 backtrace.nargs = nargs;
|
|
|
3062
|
|
74
|
3063 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3064 (nargs, vals);
|
|
0
|
3065
|
|
|
3066 /* Have to duplicate this code because if the
|
|
|
3067 * debugger is called it must be in a scope in
|
|
|
3068 * which the `alloca'-ed data in vals is still valid.
|
|
|
3069 * (And GC-protected.)
|
|
|
3070 */
|
|
|
3071 lisp_eval_depth--;
|
|
|
3072 if (backtrace.debug_on_exit)
|
|
|
3073 val = do_debug_on_exit (val);
|
|
116
|
3074 POP_BACKTRACE (backtrace);
|
|
0
|
3075 UNGCPRO;
|
|
|
3076 return (val);
|
|
|
3077 }
|
|
|
3078
|
|
|
3079 else
|
|
|
3080 {
|
|
|
3081 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3082
|
|
|
3083 GCPRO3 (args_left, fun, fun);
|
|
|
3084 gcpro3.var = argvals;
|
|
|
3085 gcpro3.nvars = 0;
|
|
|
3086
|
|
|
3087 for (i = 0; i < nargs; args_left = Fcdr (args_left))
|
|
|
3088 {
|
|
|
3089 argvals[i] = Feval (Fcar (args_left));
|
|
|
3090 gcpro3.nvars = ++i;
|
|
|
3091 }
|
|
|
3092
|
|
|
3093 UNGCPRO;
|
|
|
3094
|
|
|
3095 for (i = nargs; i < max_args; i++)
|
|
|
3096 argvals[i] = Qnil;
|
|
|
3097
|
|
|
3098 backtrace.args = argvals;
|
|
|
3099 backtrace.nargs = nargs;
|
|
|
3100
|
|
|
3101 val = funcall_subr (subr, argvals);
|
|
|
3102 }
|
|
|
3103 }
|
|
|
3104 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3105 val = apply_lambda (fun, nargs, original_args);
|
|
|
3106 else
|
|
|
3107 {
|
|
|
3108 Lisp_Object funcar;
|
|
|
3109
|
|
|
3110 if (!CONSP (fun))
|
|
|
3111 goto invalid_function;
|
|
|
3112 funcar = Fcar (fun);
|
|
|
3113 if (!SYMBOLP (funcar))
|
|
|
3114 goto invalid_function;
|
|
|
3115 if (EQ (funcar, Qautoload))
|
|
|
3116 {
|
|
|
3117 do_autoload (fun, original_fun);
|
|
|
3118 goto retry;
|
|
|
3119 }
|
|
|
3120 if (EQ (funcar, Qmacro))
|
|
|
3121 val = Feval (apply1 (Fcdr (fun), original_args));
|
|
|
3122 else if (EQ (funcar, Qlambda))
|
|
|
3123 val = apply_lambda (fun, nargs, original_args);
|
|
|
3124 else
|
|
|
3125 {
|
|
|
3126 invalid_function:
|
|
|
3127 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3128 }
|
|
|
3129 }
|
|
|
3130
|
|
|
3131 lisp_eval_depth--;
|
|
|
3132 if (backtrace.debug_on_exit)
|
|
|
3133 val = do_debug_on_exit (val);
|
|
116
|
3134 POP_BACKTRACE (backtrace);
|
|
0
|
3135 return (val);
|
|
|
3136 }
|
|
|
3137
|
|
|
3138
|
|
|
3139 Lisp_Object
|
|
|
3140 funcall_recording_as (Lisp_Object recorded_as, int nargs,
|
|
|
3141 Lisp_Object *args)
|
|
|
3142 {
|
|
|
3143 /* This function can GC */
|
|
|
3144 Lisp_Object fun;
|
|
|
3145 Lisp_Object val;
|
|
|
3146 struct backtrace backtrace;
|
|
|
3147 REGISTER int i;
|
|
|
3148
|
|
|
3149 QUIT;
|
|
|
3150 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3151 /* Callers should gcpro lexpr args */
|
|
|
3152 garbage_collect_1 ();
|
|
|
3153
|
|
|
3154 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3155 {
|
|
|
3156 if (max_lisp_eval_depth < 100)
|
|
|
3157 max_lisp_eval_depth = 100;
|
|
|
3158 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3159 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3160 }
|
|
|
3161
|
|
|
3162 /* Count number of arguments to function */
|
|
|
3163 nargs = nargs - 1;
|
|
|
3164
|
|
|
3165 #ifdef EMACS_BTL
|
|
|
3166 backtrace.id_number = 0;
|
|
|
3167 #endif
|
|
|
3168 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
3169 backtrace.function = &args[0];
|
|
|
3170 backtrace.args = &args[1];
|
|
|
3171 backtrace.nargs = nargs;
|
|
|
3172 backtrace.evalargs = 0;
|
|
|
3173 backtrace.debug_on_exit = 0;
|
|
116
|
3174 PUSH_BACKTRACE (backtrace);
|
|
0
|
3175
|
|
|
3176 if (debug_on_next_call)
|
|
|
3177 do_debug_on_call (Qlambda);
|
|
|
3178
|
|
|
3179 retry:
|
|
|
3180
|
|
|
3181 fun = args[0];
|
|
|
3182
|
|
|
3183 #ifdef EMACS_BTL
|
|
|
3184 {
|
|
|
3185 extern int emacs_btl_elisp_only_p;
|
|
|
3186 extern int btl_symbol_id_number ();
|
|
|
3187 if (emacs_btl_elisp_only_p)
|
|
|
3188 backtrace.id_number = btl_symbol_id_number (fun);
|
|
|
3189 }
|
|
|
3190 #endif
|
|
|
3191
|
|
|
3192 if (SYMBOLP (fun))
|
|
|
3193 fun = indirect_function (fun, 1);
|
|
|
3194
|
|
|
3195 if (SUBRP (fun))
|
|
|
3196 {
|
|
|
3197 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3198 int max_args = subr->max_args;
|
|
|
3199
|
|
|
3200 if (max_args == UNEVALLED)
|
|
|
3201 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3202
|
|
|
3203 if (nargs < subr->min_args
|
|
|
3204 || (max_args >= 0 && max_args < nargs))
|
|
|
3205 {
|
|
|
3206 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3207 list2 (fun, make_int (nargs)));
|
|
|
3208 }
|
|
|
3209
|
|
|
3210 if (max_args == MANY)
|
|
|
3211 {
|
|
74
|
3212 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3213 (nargs, args + 1);
|
|
0
|
3214 }
|
|
|
3215
|
|
|
3216 else if (max_args > nargs)
|
|
|
3217 {
|
|
|
3218 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
3219
|
|
|
3220 /* Default optionals to nil */
|
|
|
3221 for (i = 0; i < nargs; i++)
|
|
|
3222 argvals[i] = args[i + 1];
|
|
|
3223 for (i = nargs; i < max_args; i++)
|
|
|
3224 argvals[i] = Qnil;
|
|
|
3225
|
|
|
3226 val = funcall_subr (subr, argvals);
|
|
|
3227 }
|
|
|
3228 else
|
|
|
3229 val = funcall_subr (subr, args + 1);
|
|
|
3230 }
|
|
|
3231 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3232 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3233 else if (!CONSP (fun))
|
|
|
3234 {
|
|
|
3235 invalid_function:
|
|
|
3236 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3237 }
|
|
|
3238 else
|
|
|
3239 {
|
|
|
3240 Lisp_Object funcar = Fcar (fun);
|
|
|
3241
|
|
|
3242 if (!SYMBOLP (funcar))
|
|
|
3243 goto invalid_function;
|
|
|
3244 if (EQ (funcar, Qlambda))
|
|
|
3245 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3246 else if (EQ (funcar, Qautoload))
|
|
|
3247 {
|
|
|
3248 do_autoload (fun, args[0]);
|
|
|
3249 goto retry;
|
|
|
3250 }
|
|
|
3251 else
|
|
|
3252 {
|
|
|
3253 goto invalid_function;
|
|
|
3254 }
|
|
|
3255 }
|
|
|
3256 lisp_eval_depth--;
|
|
|
3257 if (backtrace.debug_on_exit)
|
|
|
3258 val = do_debug_on_exit (val);
|
|
116
|
3259 POP_BACKTRACE (backtrace);
|
|
0
|
3260 return val;
|
|
|
3261 }
|
|
|
3262
|
|
20
|
3263 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
0
|
3264 Call first argument as a function, passing remaining arguments to it.
|
|
|
3265 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
20
|
3266 */
|
|
|
3267 (int nargs, Lisp_Object *args))
|
|
0
|
3268 {
|
|
|
3269 return funcall_recording_as (args[0], nargs, args);
|
|
|
3270 }
|
|
|
3271
|
|
20
|
3272 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
0
|
3273 Return the number of arguments a function may be called with. The
|
|
|
3274 function may be any form that can be passed to `funcall', any special
|
|
|
3275 form, or any macro.
|
|
20
|
3276 */
|
|
|
3277 (function))
|
|
0
|
3278 {
|
|
|
3279 Lisp_Object orig_function = function;
|
|
|
3280 Lisp_Object arglist;
|
|
|
3281 int argcount;
|
|
|
3282
|
|
|
3283 retry:
|
|
|
3284
|
|
|
3285 if (SYMBOLP (function))
|
|
|
3286 function = indirect_function (function, 1);
|
|
|
3287
|
|
|
3288 if (SUBRP (function))
|
|
|
3289 return Fsubr_min_args (function);
|
|
|
3290 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3291 {
|
|
|
3292 invalid_function:
|
|
|
3293 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3294 }
|
|
|
3295
|
|
|
3296 if (CONSP (function))
|
|
|
3297 {
|
|
|
3298 Lisp_Object funcar = Fcar (function);
|
|
|
3299
|
|
|
3300 if (!SYMBOLP (funcar))
|
|
|
3301 goto invalid_function;
|
|
|
3302 if (EQ (funcar, Qmacro))
|
|
|
3303 {
|
|
|
3304 function = Fcdr (function);
|
|
|
3305 goto retry;
|
|
|
3306 }
|
|
|
3307 if (EQ (funcar, Qautoload))
|
|
|
3308 {
|
|
|
3309 do_autoload (function, orig_function);
|
|
|
3310 goto retry;
|
|
|
3311 }
|
|
|
3312 if (EQ (funcar, Qlambda))
|
|
|
3313 arglist = Fcar (Fcdr (function));
|
|
|
3314 else
|
|
|
3315 goto invalid_function;
|
|
|
3316 }
|
|
|
3317 else
|
|
|
3318 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3319
|
|
|
3320 argcount = 0;
|
|
|
3321 while (!NILP (arglist))
|
|
|
3322 {
|
|
|
3323 QUIT;
|
|
|
3324 if (EQ (Fcar (arglist), Qand_optional)
|
|
|
3325 || EQ (Fcar (arglist), Qand_rest))
|
|
|
3326 break;
|
|
|
3327 argcount++;
|
|
|
3328 arglist = Fcdr (arglist);
|
|
|
3329 }
|
|
|
3330
|
|
|
3331 return make_int (argcount);
|
|
|
3332 }
|
|
|
3333
|
|
20
|
3334 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
0
|
3335 Return the number of arguments a function may be called with. If the
|
|
|
3336 function takes an arbitrary number of arguments or is a built-in
|
|
|
3337 special form, nil is returned. The function may be any form that can
|
|
|
3338 be passed to `funcall', any special form, or any macro.
|
|
20
|
3339 */
|
|
|
3340 (function))
|
|
0
|
3341 {
|
|
|
3342 Lisp_Object orig_function = function;
|
|
|
3343 Lisp_Object arglist;
|
|
|
3344 int argcount;
|
|
|
3345
|
|
|
3346 retry:
|
|
|
3347
|
|
|
3348 if (SYMBOLP (function))
|
|
|
3349 function = indirect_function (function, 1);
|
|
|
3350
|
|
|
3351 if (SUBRP (function))
|
|
|
3352 return Fsubr_max_args (function);
|
|
|
3353 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3354 {
|
|
|
3355 invalid_function:
|
|
|
3356 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3357 }
|
|
|
3358
|
|
|
3359 if (CONSP (function))
|
|
|
3360 {
|
|
|
3361 Lisp_Object funcar = Fcar (function);
|
|
|
3362
|
|
|
3363 if (!SYMBOLP (funcar))
|
|
|
3364 goto invalid_function;
|
|
|
3365 if (EQ (funcar, Qmacro))
|
|
|
3366 {
|
|
|
3367 function = Fcdr (function);
|
|
|
3368 goto retry;
|
|
|
3369 }
|
|
|
3370 if (EQ (funcar, Qautoload))
|
|
|
3371 {
|
|
|
3372 do_autoload (function, orig_function);
|
|
|
3373 goto retry;
|
|
|
3374 }
|
|
|
3375 if (EQ (funcar, Qlambda))
|
|
|
3376 arglist = Fcar (Fcdr (function));
|
|
|
3377 else
|
|
|
3378 goto invalid_function;
|
|
|
3379 }
|
|
|
3380 else
|
|
|
3381 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3382
|
|
|
3383 argcount = 0;
|
|
|
3384 while (!NILP (arglist))
|
|
|
3385 {
|
|
|
3386 QUIT;
|
|
|
3387 if (EQ (Fcar (arglist), Qand_optional))
|
|
|
3388 {
|
|
|
3389 arglist = Fcdr (arglist);
|
|
|
3390 continue;
|
|
|
3391 }
|
|
|
3392 if (EQ (Fcar (arglist), Qand_rest))
|
|
|
3393 return Qnil;
|
|
|
3394 argcount++;
|
|
|
3395 arglist = Fcdr (arglist);
|
|
|
3396 }
|
|
|
3397
|
|
|
3398 return make_int (argcount);
|
|
|
3399 }
|
|
|
3400
|
|
|
3401
|
|
20
|
3402 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
0
|
3403 Call FUNCTION with our remaining args, using our last arg as list of args.
|
|
|
3404 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3405 */
|
|
|
3406 (int nargs, Lisp_Object *args))
|
|
0
|
3407 {
|
|
|
3408 /* This function can GC */
|
|
|
3409 Lisp_Object fun = args[0];
|
|
|
3410 Lisp_Object spread_arg = args [nargs - 1];
|
|
|
3411 int numargs;
|
|
|
3412 int funcall_nargs;
|
|
|
3413
|
|
|
3414 CHECK_LIST (spread_arg);
|
|
|
3415
|
|
|
3416 numargs = XINT (Flength (spread_arg));
|
|
|
3417
|
|
|
3418 if (numargs == 0)
|
|
|
3419 /* (apply foo 0 1 '()) */
|
|
|
3420 return Ffuncall (nargs - 1, args);
|
|
|
3421 else if (numargs == 1)
|
|
|
3422 {
|
|
|
3423 /* (apply foo 0 1 '(2)) */
|
|
|
3424 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3425 return Ffuncall (nargs, args);
|
|
|
3426 }
|
|
|
3427
|
|
|
3428 /* -1 for function, -1 for spread arg */
|
|
|
3429 numargs = nargs - 2 + numargs;
|
|
|
3430 /* +1 for function */
|
|
|
3431 funcall_nargs = 1 + numargs;
|
|
|
3432
|
|
|
3433 if (SYMBOLP (fun))
|
|
|
3434 fun = indirect_function (fun, 0);
|
|
|
3435 if (UNBOUNDP (fun))
|
|
|
3436 {
|
|
|
3437 /* Let funcall get the error */
|
|
|
3438 fun = args[0];
|
|
|
3439 }
|
|
|
3440 else if (SUBRP (fun))
|
|
|
3441 {
|
|
|
3442 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3443 int max_args = subr->max_args;
|
|
|
3444
|
|
|
3445 if (numargs < subr->min_args
|
|
|
3446 || (max_args >= 0 && max_args < numargs))
|
|
|
3447 {
|
|
|
3448 /* Let funcall get the error */
|
|
|
3449 }
|
|
|
3450 else if (max_args > numargs)
|
|
|
3451 {
|
|
|
3452 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3453 by explicitly supplying nil's for optional values */
|
|
|
3454 funcall_nargs += (max_args - numargs);
|
|
|
3455 }
|
|
|
3456 }
|
|
|
3457 {
|
|
|
3458 REGISTER int i;
|
|
|
3459 REGISTER Lisp_Object *funcall_args
|
|
|
3460 = (Lisp_Object *) alloca (funcall_nargs * sizeof (Lisp_Object));
|
|
|
3461 struct gcpro gcpro1;
|
|
|
3462
|
|
|
3463 GCPRO1 (*funcall_args);
|
|
|
3464 gcpro1.nvars = funcall_nargs;
|
|
|
3465
|
|
|
3466 /* Copy in the unspread args */
|
|
|
3467 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3468 /* Spread the last arg we got. Its first element goes in
|
|
|
3469 the slot that it used to occupy, hence this value of I. */
|
|
|
3470 for (i = nargs - 1;
|
|
|
3471 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3472 i++, spread_arg = XCDR (spread_arg))
|
|
|
3473 {
|
|
|
3474 funcall_args [i] = XCAR (spread_arg);
|
|
|
3475 }
|
|
|
3476 /* Supply nil for optional args (to subrs) */
|
|
|
3477 for (; i < funcall_nargs; i++)
|
|
|
3478 funcall_args[i] = Qnil;
|
|
|
3479
|
|
|
3480
|
|
|
3481 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3482 }
|
|
|
3483 }
|
|
|
3484
|
|
|
3485
|
|
74
|
3486 /* Define proper types and argument lists simultaneously */
|
|
|
3487 #define PRIMITIVE_FUNCALL(n) ((Lisp_Object (*) (PRIMITIVE_FUNCALL_##n)
|
|
|
3488 #define PRIMITIVE_FUNCALL_0 void)) (fn)) (
|
|
|
3489 #define PRIMITIVE_FUNCALL_1 Lisp_Object)) (fn)) (args[0]
|
|
|
3490 #define PRIMITIVE_FUNCALL_2 Lisp_Object, PRIMITIVE_FUNCALL_1, args[1]
|
|
|
3491 #define PRIMITIVE_FUNCALL_3 Lisp_Object, PRIMITIVE_FUNCALL_2, args[2]
|
|
|
3492 #define PRIMITIVE_FUNCALL_4 Lisp_Object, PRIMITIVE_FUNCALL_3, args[3]
|
|
|
3493 #define PRIMITIVE_FUNCALL_5 Lisp_Object, PRIMITIVE_FUNCALL_4, args[4]
|
|
|
3494 #define PRIMITIVE_FUNCALL_6 Lisp_Object, PRIMITIVE_FUNCALL_5, args[5]
|
|
|
3495 #define PRIMITIVE_FUNCALL_7 Lisp_Object, PRIMITIVE_FUNCALL_6, args[6]
|
|
|
3496 #define PRIMITIVE_FUNCALL_8 Lisp_Object, PRIMITIVE_FUNCALL_7, args[7]
|
|
|
3497 #define PRIMITIVE_FUNCALL_9 Lisp_Object, PRIMITIVE_FUNCALL_8, args[8]
|
|
|
3498 #define PRIMITIVE_FUNCALL_10 Lisp_Object, PRIMITIVE_FUNCALL_9, args[9]
|
|
|
3499 #define PRIMITIVE_FUNCALL_11 Lisp_Object, PRIMITIVE_FUNCALL_10, args[10]
|
|
|
3500 #define PRIMITIVE_FUNCALL_12 Lisp_Object, PRIMITIVE_FUNCALL_11, args[11]
|
|
|
3501
|
|
0
|
3502 static Lisp_Object
|
|
74
|
3503 primitive_funcall (lisp_fn_t fn, int nargs, Lisp_Object args[])
|
|
0
|
3504 {
|
|
|
3505 switch (nargs)
|
|
|
3506 {
|
|
74
|
3507 case 0: return PRIMITIVE_FUNCALL(0);
|
|
|
3508 case 1: return PRIMITIVE_FUNCALL(1);
|
|
|
3509 case 2: return PRIMITIVE_FUNCALL(2);
|
|
|
3510 case 3: return PRIMITIVE_FUNCALL(3);
|
|
|
3511 case 4: return PRIMITIVE_FUNCALL(4);
|
|
|
3512 case 5: return PRIMITIVE_FUNCALL(5);
|
|
|
3513 case 6: return PRIMITIVE_FUNCALL(6);
|
|
|
3514 case 7: return PRIMITIVE_FUNCALL(7);
|
|
|
3515 case 8: return PRIMITIVE_FUNCALL(8);
|
|
|
3516 case 9: return PRIMITIVE_FUNCALL(9);
|
|
|
3517 case 10: return PRIMITIVE_FUNCALL(10);
|
|
|
3518 case 11: return PRIMITIVE_FUNCALL(11);
|
|
|
3519 case 12: return PRIMITIVE_FUNCALL(12);
|
|
0
|
3520 }
|
|
74
|
3521
|
|
|
3522 /* Someone has created a subr that takes more arguments than is
|
|
|
3523 supported by this code. We need to either rewrite the subr to
|
|
|
3524 use a different argument protocol, or add more cases to this
|
|
|
3525 switch. */
|
|
|
3526 abort ();
|
|
0
|
3527 return Qnil; /* suppress compiler warning */
|
|
|
3528 }
|
|
|
3529
|
|
|
3530 static Lisp_Object
|
|
|
3531 funcall_subr (struct Lisp_Subr *subr, Lisp_Object args[])
|
|
|
3532 {
|
|
|
3533 return primitive_funcall (subr_function (subr), subr->max_args, args);
|
|
|
3534 }
|
|
|
3535
|
|
|
3536 /* FSFmacs has an extra arg EVAL_FLAG. If false, some of
|
|
|
3537 the statements below are not done. But it's always true
|
|
|
3538 in all the calls to apply_lambda(). */
|
|
|
3539
|
|
|
3540 static Lisp_Object
|
|
|
3541 apply_lambda (Lisp_Object fun, int numargs, Lisp_Object unevalled_args)
|
|
|
3542 {
|
|
|
3543 /* This function can GC */
|
|
|
3544 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3545 REGISTER int i;
|
|
|
3546 REGISTER Lisp_Object tem;
|
|
|
3547 REGISTER Lisp_Object *arg_vector
|
|
|
3548 = (Lisp_Object *) alloca (numargs * sizeof (Lisp_Object));
|
|
|
3549
|
|
|
3550 GCPRO3 (*arg_vector, unevalled_args, fun);
|
|
|
3551 gcpro1.nvars = 0;
|
|
|
3552
|
|
|
3553 for (i = 0; i < numargs;)
|
|
|
3554 {
|
|
|
3555 tem = Fcar (unevalled_args), unevalled_args = Fcdr (unevalled_args);
|
|
|
3556 tem = Feval (tem);
|
|
|
3557 arg_vector[i++] = tem;
|
|
|
3558 gcpro1.nvars = i;
|
|
|
3559 }
|
|
|
3560
|
|
|
3561 UNGCPRO;
|
|
|
3562
|
|
|
3563 backtrace_list->args = arg_vector;
|
|
|
3564 backtrace_list->nargs = i;
|
|
|
3565 backtrace_list->evalargs = 0;
|
|
|
3566 tem = funcall_lambda (fun, numargs, arg_vector);
|
|
|
3567
|
|
|
3568 /* Do the debug-on-exit now, while arg_vector still exists. */
|
|
|
3569 if (backtrace_list->debug_on_exit)
|
|
|
3570 tem = do_debug_on_exit (tem);
|
|
|
3571 /* Don't do it again when we return to eval. */
|
|
|
3572 backtrace_list->debug_on_exit = 0;
|
|
|
3573 return (tem);
|
|
|
3574 }
|
|
|
3575
|
|
|
3576 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
|
|
|
3577 and return the result of evaluation.
|
|
|
3578 FUN must be either a lambda-expression or a compiled-code object. */
|
|
|
3579
|
|
|
3580 static Lisp_Object
|
|
|
3581 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object arg_vector[])
|
|
|
3582 {
|
|
|
3583 /* This function can GC */
|
|
|
3584 Lisp_Object val, tem;
|
|
|
3585 REGISTER Lisp_Object syms_left;
|
|
|
3586 REGISTER Lisp_Object next;
|
|
|
3587 int speccount = specpdl_depth_counter;
|
|
|
3588 REGISTER int i;
|
|
|
3589 int optional = 0, rest = 0;
|
|
|
3590
|
|
|
3591 if (CONSP (fun))
|
|
|
3592 syms_left = Fcar (Fcdr (fun));
|
|
|
3593 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3594 syms_left = XCOMPILED_FUNCTION (fun)->arglist;
|
|
|
3595 else abort ();
|
|
|
3596
|
|
|
3597 i = 0;
|
|
|
3598 for (; !NILP (syms_left); syms_left = Fcdr (syms_left))
|
|
|
3599 {
|
|
|
3600 QUIT;
|
|
|
3601 next = Fcar (syms_left);
|
|
|
3602 if (!SYMBOLP (next))
|
|
|
3603 signal_error (Qinvalid_function, list1 (fun));
|
|
|
3604 if (EQ (next, Qand_rest))
|
|
|
3605 rest = 1;
|
|
|
3606 else if (EQ (next, Qand_optional))
|
|
|
3607 optional = 1;
|
|
|
3608 else if (rest)
|
|
|
3609 {
|
|
|
3610 specbind (next, Flist (nargs - i, &arg_vector[i]));
|
|
|
3611 i = nargs;
|
|
|
3612 }
|
|
|
3613 else if (i < nargs)
|
|
|
3614 {
|
|
|
3615 tem = arg_vector[i++];
|
|
|
3616 specbind (next, tem);
|
|
|
3617 }
|
|
|
3618 else if (!optional)
|
|
|
3619 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3620 list2 (fun, make_int (nargs)));
|
|
|
3621 else
|
|
|
3622 specbind (next, Qnil);
|
|
|
3623 }
|
|
|
3624
|
|
|
3625 if (i < nargs)
|
|
|
3626 return Fsignal (Qwrong_number_of_arguments,
|
|
|
3627 list2 (fun, make_int (nargs)));
|
|
|
3628
|
|
|
3629 if (CONSP (fun))
|
|
|
3630 val = Fprogn (Fcdr (Fcdr (fun)));
|
|
|
3631 else
|
|
|
3632 {
|
|
|
3633 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (fun);
|
|
|
3634 /* If we have not actually read the bytecode string
|
|
|
3635 and constants vector yet, fetch them from the file. */
|
|
|
3636 if (CONSP (b->bytecodes))
|
|
|
3637 Ffetch_bytecode (fun);
|
|
|
3638 val = Fbyte_code (b->bytecodes,
|
|
|
3639 b->constants,
|
|
|
3640 make_int (b->maxdepth));
|
|
|
3641 }
|
|
|
3642 return unbind_to (speccount, val);
|
|
|
3643 }
|
|
|
3644
|
|
20
|
3645 DEFUN ("fetch-bytecode", Ffetch_bytecode, 1, 1, 0, /*
|
|
0
|
3646 If byte-compiled OBJECT is lazy-loaded, fetch it now.
|
|
20
|
3647 */
|
|
|
3648 (object))
|
|
0
|
3649 {
|
|
|
3650 Lisp_Object tem;
|
|
|
3651
|
|
|
3652 if (COMPILED_FUNCTIONP (object)
|
|
|
3653 && CONSP (XCOMPILED_FUNCTION (object)->bytecodes))
|
|
|
3654 {
|
|
|
3655 tem = read_doc_string (XCOMPILED_FUNCTION (object)->bytecodes);
|
|
|
3656 if (!CONSP (tem))
|
|
|
3657 signal_simple_error ("invalid lazy-loaded byte code", tem);
|
|
70
|
3658 /* v18 or v19 bytecode file. Need to Ebolify. */
|
|
|
3659 if (XCOMPILED_FUNCTION (object)->flags.ebolified
|
|
|
3660 && VECTORP (XCDR (tem)))
|
|
|
3661 ebolify_bytecode_constants (XCDR (tem));
|
|
0
|
3662 /* VERY IMPORTANT to purecopy here!!!!!
|
|
|
3663 See load_force_doc_string_unwind. */
|
|
|
3664 XCOMPILED_FUNCTION (object)->bytecodes = Fpurecopy (XCAR (tem));
|
|
|
3665 XCOMPILED_FUNCTION (object)->constants = Fpurecopy (XCDR (tem));
|
|
|
3666 }
|
|
|
3667 return object;
|
|
|
3668 }
|
|
|
3669
|
|
|
3670
|
|
|
3671 /**********************************************************************/
|
|
|
3672 /* Run hook variables in various ways. */
|
|
|
3673 /**********************************************************************/
|
|
|
3674
|
|
20
|
3675 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3676 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3677 Each argument should be a symbol, a hook variable.
|
|
|
3678 These symbols are processed in the order specified.
|
|
|
3679 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3680 or a list of functions to be called to run the hook.
|
|
|
3681 If the value is a function, it is called with no arguments.
|
|
|
3682 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3683
|
|
|
3684 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3685 not `make-local-variable'.
|
|
20
|
3686 */
|
|
|
3687 (int nargs, Lisp_Object *args))
|
|
0
|
3688 {
|
|
|
3689 Lisp_Object hook[1];
|
|
|
3690 REGISTER int i;
|
|
|
3691
|
|
|
3692 for (i = 0; i < nargs; i++)
|
|
|
3693 {
|
|
|
3694 hook[0] = args[i];
|
|
|
3695 run_hook_with_args (1, hook, RUN_HOOKS_TO_COMPLETION);
|
|
|
3696 }
|
|
|
3697
|
|
|
3698 return Qnil;
|
|
|
3699 }
|
|
|
3700
|
|
20
|
3701 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3702 Run HOOK with the specified arguments ARGS.
|
|
|
3703 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3704 value, that value may be a function or a list of functions to be
|
|
|
3705 called to run the hook. If the value is a function, it is called with
|
|
|
3706 the given arguments and its return value is returned. If it is a list
|
|
|
3707 of functions, those functions are called, in order,
|
|
|
3708 with the given arguments ARGS.
|
|
|
3709 It is best not to depend on the value return by `run-hook-with-args',
|
|
|
3710 as that may change.
|
|
|
3711
|
|
|
3712 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3713 not `make-local-variable'.
|
|
20
|
3714 */
|
|
|
3715 (int nargs, Lisp_Object *args))
|
|
0
|
3716 {
|
|
|
3717 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3718 }
|
|
|
3719
|
|
20
|
3720 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3721 Run HOOK with the specified arguments ARGS.
|
|
|
3722 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3723 be a list of functions. We call those functions, one by one,
|
|
|
3724 passing arguments ARGS to each of them, until one of them
|
|
|
3725 returns a non-nil value. Then we return that value.
|
|
|
3726 If all the functions return nil, we return nil.
|
|
|
3727
|
|
|
3728 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3729 not `make-local-variable'.
|
|
20
|
3730 */
|
|
|
3731 (int nargs, Lisp_Object *args))
|
|
0
|
3732 {
|
|
|
3733 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3734 }
|
|
|
3735
|
|
20
|
3736 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3737 Run HOOK with the specified arguments ARGS.
|
|
|
3738 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3739 be a list of functions. We call those functions, one by one,
|
|
|
3740 passing arguments ARGS to each of them, until one of them
|
|
|
3741 returns nil. Then we return nil.
|
|
|
3742 If all the functions return non-nil, we return non-nil.
|
|
|
3743
|
|
|
3744 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3745 not `make-local-variable'.
|
|
20
|
3746 */
|
|
|
3747 (int nargs, Lisp_Object *args))
|
|
0
|
3748 {
|
|
|
3749 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3750 }
|
|
|
3751
|
|
|
3752 /* ARGS[0] should be a hook symbol.
|
|
|
3753 Call each of the functions in the hook value, passing each of them
|
|
|
3754 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3755 COND specifies a condition to test after each call
|
|
|
3756 to decide whether to stop.
|
|
|
3757 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3758 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3759
|
|
|
3760 Lisp_Object
|
|
|
3761 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3762 enum run_hooks_condition cond)
|
|
|
3763 {
|
|
|
3764 Lisp_Object sym, val, ret;
|
|
|
3765 struct gcpro gcpro1, gcpro2;
|
|
|
3766
|
|
|
3767 if (!initialized || preparing_for_armageddon)
|
|
|
3768 /* We need to bail out of here pronto. */
|
|
|
3769 return Qnil;
|
|
|
3770
|
|
|
3771 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3772 will also be true unless something is really hosed. */
|
|
|
3773 assert (!gc_in_progress);
|
|
|
3774
|
|
|
3775 sym = args[0];
|
|
|
3776 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3777 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3778
|
|
|
3779 if (UNBOUNDP (val) || NILP (val))
|
|
|
3780 return ret;
|
|
|
3781 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3782 {
|
|
|
3783 args[0] = val;
|
|
|
3784 return Ffuncall (nargs, args);
|
|
|
3785 }
|
|
|
3786 else
|
|
|
3787 {
|
|
|
3788 GCPRO2 (sym, val);
|
|
|
3789
|
|
|
3790 for (;
|
|
|
3791 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3792 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3793 : !NILP (ret)));
|
|
|
3794 val = XCDR (val))
|
|
|
3795 {
|
|
|
3796 if (EQ (XCAR (val), Qt))
|
|
|
3797 {
|
|
|
3798 /* t indicates this hook has a local binding;
|
|
|
3799 it means to run the global binding too. */
|
|
|
3800 Lisp_Object globals;
|
|
|
3801
|
|
|
3802 for (globals = Fdefault_value (sym);
|
|
|
3803 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3804 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3805 ? NILP (ret)
|
|
|
3806 : !NILP (ret)));
|
|
|
3807 globals = XCDR (globals))
|
|
|
3808 {
|
|
|
3809 args[0] = XCAR (globals);
|
|
|
3810 /* In a global value, t should not occur. If it does, we
|
|
|
3811 must ignore it to avoid an endless loop. */
|
|
|
3812 if (!EQ (args[0], Qt))
|
|
|
3813 ret = Ffuncall (nargs, args);
|
|
|
3814 }
|
|
|
3815 }
|
|
|
3816 else
|
|
|
3817 {
|
|
|
3818 args[0] = XCAR (val);
|
|
|
3819 ret = Ffuncall (nargs, args);
|
|
|
3820 }
|
|
|
3821 }
|
|
|
3822
|
|
|
3823 UNGCPRO;
|
|
|
3824 return ret;
|
|
|
3825 }
|
|
|
3826 }
|
|
|
3827
|
|
|
3828 Lisp_Object
|
|
|
3829 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3830 enum run_hooks_condition cond)
|
|
|
3831 {
|
|
|
3832 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3833 }
|
|
|
3834
|
|
|
3835 #if 0
|
|
|
3836
|
|
|
3837 /* From FSF 19.30, not currently used */
|
|
|
3838
|
|
|
3839 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3840 present value of that symbol.
|
|
|
3841 Call each element of FUNLIST,
|
|
|
3842 passing each of them the rest of ARGS.
|
|
|
3843 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3844 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3845
|
|
|
3846 Lisp_Object
|
|
|
3847 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3848 {
|
|
|
3849 Lisp_Object sym;
|
|
|
3850 Lisp_Object val;
|
|
|
3851 struct gcpro gcpro1, gcpro2;
|
|
|
3852
|
|
|
3853 sym = args[0];
|
|
|
3854 GCPRO2 (sym, val);
|
|
|
3855
|
|
|
3856 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3857 {
|
|
|
3858 if (EQ (XCAR (val), Qt))
|
|
|
3859 {
|
|
|
3860 /* t indicates this hook has a local binding;
|
|
|
3861 it means to run the global binding too. */
|
|
|
3862 Lisp_Object globals;
|
|
|
3863
|
|
|
3864 for (globals = Fdefault_value (sym);
|
|
|
3865 CONSP (globals);
|
|
|
3866 globals = XCDR (globals))
|
|
|
3867 {
|
|
|
3868 args[0] = XCAR (globals);
|
|
|
3869 /* In a global value, t should not occur. If it does, we
|
|
|
3870 must ignore it to avoid an endless loop. */
|
|
|
3871 if (!EQ (args[0], Qt))
|
|
|
3872 Ffuncall (nargs, args);
|
|
|
3873 }
|
|
|
3874 }
|
|
|
3875 else
|
|
|
3876 {
|
|
|
3877 args[0] = XCAR (val);
|
|
|
3878 Ffuncall (nargs, args);
|
|
|
3879 }
|
|
|
3880 }
|
|
|
3881 UNGCPRO;
|
|
|
3882 return Qnil;
|
|
|
3883 }
|
|
|
3884
|
|
|
3885 #endif /* 0 */
|
|
|
3886
|
|
|
3887 void
|
|
|
3888 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3889 {
|
|
|
3890 /* This function can GC */
|
|
|
3891 struct gcpro gcpro1;
|
|
|
3892 int i;
|
|
|
3893 va_list vargs;
|
|
|
3894 Lisp_Object *funcall_args =
|
|
|
3895 (Lisp_Object *) alloca ((1 + nargs) * sizeof (Lisp_Object));
|
|
|
3896
|
|
|
3897 va_start (vargs, nargs);
|
|
|
3898 funcall_args[0] = hook_var;
|
|
|
3899 for (i = 0; i < nargs; i++)
|
|
|
3900 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3901 va_end (vargs);
|
|
|
3902
|
|
|
3903 GCPRO1 (*funcall_args);
|
|
|
3904 gcpro1.nvars = nargs + 1;
|
|
|
3905 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3906 UNGCPRO;
|
|
|
3907 }
|
|
|
3908
|
|
|
3909 void
|
|
|
3910 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3911 int nargs, ...)
|
|
|
3912 {
|
|
|
3913 /* This function can GC */
|
|
|
3914 struct gcpro gcpro1;
|
|
|
3915 int i;
|
|
|
3916 va_list vargs;
|
|
|
3917 Lisp_Object *funcall_args =
|
|
|
3918 (Lisp_Object *) alloca ((1 + nargs) * sizeof (Lisp_Object));
|
|
|
3919
|
|
|
3920 va_start (vargs, nargs);
|
|
|
3921 funcall_args[0] = hook_var;
|
|
|
3922 for (i = 0; i < nargs; i++)
|
|
|
3923 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3924 va_end (vargs);
|
|
|
3925
|
|
|
3926 GCPRO1 (*funcall_args);
|
|
|
3927 gcpro1.nvars = nargs + 1;
|
|
|
3928 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3929 RUN_HOOKS_TO_COMPLETION);
|
|
|
3930 UNGCPRO;
|
|
|
3931 }
|
|
|
3932
|
|
|
3933 Lisp_Object
|
|
|
3934 run_hook (Lisp_Object hook)
|
|
|
3935 {
|
|
|
3936 Frun_hooks (1, &hook);
|
|
|
3937 return Qnil;
|
|
|
3938 }
|
|
|
3939
|
|
|
3940
|
|
|
3941 /**********************************************************************/
|
|
|
3942 /* Front-ends to eval, funcall, apply */
|
|
|
3943 /**********************************************************************/
|
|
|
3944
|
|
|
3945 /* Apply fn to arg */
|
|
|
3946 Lisp_Object
|
|
|
3947 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3948 {
|
|
|
3949 /* This function can GC */
|
|
|
3950 struct gcpro gcpro1;
|
|
|
3951 Lisp_Object args[2];
|
|
|
3952
|
|
|
3953 if (NILP (arg))
|
|
|
3954 return (Ffuncall (1, &fn));
|
|
|
3955 GCPRO1 (args[0]);
|
|
|
3956 gcpro1.nvars = 2;
|
|
|
3957 args[0] = fn;
|
|
|
3958 args[1] = arg;
|
|
|
3959 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3960 }
|
|
|
3961
|
|
|
3962 /* Call function fn on no arguments */
|
|
|
3963 Lisp_Object
|
|
|
3964 call0 (Lisp_Object fn)
|
|
|
3965 {
|
|
|
3966 /* This function can GC */
|
|
|
3967 struct gcpro gcpro1;
|
|
|
3968
|
|
|
3969 GCPRO1 (fn);
|
|
|
3970 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3971 }
|
|
|
3972
|
|
|
3973 /* Call function fn with argument arg0 */
|
|
|
3974 Lisp_Object
|
|
|
3975 call1 (Lisp_Object fn,
|
|
|
3976 Lisp_Object arg0)
|
|
|
3977 {
|
|
|
3978 /* This function can GC */
|
|
|
3979 struct gcpro gcpro1;
|
|
|
3980 Lisp_Object args[2];
|
|
|
3981 args[0] = fn;
|
|
|
3982 args[1] = arg0;
|
|
|
3983 GCPRO1 (args[0]);
|
|
|
3984 gcpro1.nvars = 2;
|
|
|
3985 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3986 }
|
|
|
3987
|
|
|
3988 /* Call function fn with arguments arg0, arg1 */
|
|
|
3989 Lisp_Object
|
|
|
3990 call2 (Lisp_Object fn,
|
|
|
3991 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3992 {
|
|
|
3993 /* This function can GC */
|
|
|
3994 struct gcpro gcpro1;
|
|
|
3995 Lisp_Object args[3];
|
|
|
3996 args[0] = fn;
|
|
|
3997 args[1] = arg0;
|
|
|
3998 args[2] = arg1;
|
|
|
3999 GCPRO1 (args[0]);
|
|
|
4000 gcpro1.nvars = 3;
|
|
|
4001 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
4002 }
|
|
|
4003
|
|
|
4004 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
4005 Lisp_Object
|
|
|
4006 call3 (Lisp_Object fn,
|
|
|
4007 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4008 {
|
|
|
4009 /* This function can GC */
|
|
|
4010 struct gcpro gcpro1;
|
|
|
4011 Lisp_Object args[4];
|
|
|
4012 args[0] = fn;
|
|
|
4013 args[1] = arg0;
|
|
|
4014 args[2] = arg1;
|
|
|
4015 args[3] = arg2;
|
|
|
4016 GCPRO1 (args[0]);
|
|
|
4017 gcpro1.nvars = 4;
|
|
|
4018 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
4019 }
|
|
|
4020
|
|
|
4021 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
4022 Lisp_Object
|
|
|
4023 call4 (Lisp_Object fn,
|
|
|
4024 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4025 Lisp_Object arg3)
|
|
|
4026 {
|
|
|
4027 /* This function can GC */
|
|
|
4028 struct gcpro gcpro1;
|
|
|
4029 Lisp_Object args[5];
|
|
|
4030 args[0] = fn;
|
|
|
4031 args[1] = arg0;
|
|
|
4032 args[2] = arg1;
|
|
|
4033 args[3] = arg2;
|
|
|
4034 args[4] = arg3;
|
|
|
4035 GCPRO1 (args[0]);
|
|
|
4036 gcpro1.nvars = 5;
|
|
|
4037 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
4038 }
|
|
|
4039
|
|
|
4040 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
4041 Lisp_Object
|
|
|
4042 call5 (Lisp_Object fn,
|
|
|
4043 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4044 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4045 {
|
|
|
4046 /* This function can GC */
|
|
|
4047 struct gcpro gcpro1;
|
|
|
4048 Lisp_Object args[6];
|
|
|
4049 args[0] = fn;
|
|
|
4050 args[1] = arg0;
|
|
|
4051 args[2] = arg1;
|
|
|
4052 args[3] = arg2;
|
|
|
4053 args[4] = arg3;
|
|
|
4054 args[5] = arg4;
|
|
|
4055 GCPRO1 (args[0]);
|
|
|
4056 gcpro1.nvars = 6;
|
|
|
4057 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
4058 }
|
|
|
4059
|
|
|
4060 Lisp_Object
|
|
|
4061 call6 (Lisp_Object fn,
|
|
|
4062 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4063 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4064 {
|
|
|
4065 /* This function can GC */
|
|
|
4066 struct gcpro gcpro1;
|
|
|
4067 Lisp_Object args[7];
|
|
|
4068 args[0] = fn;
|
|
|
4069 args[1] = arg0;
|
|
|
4070 args[2] = arg1;
|
|
|
4071 args[3] = arg2;
|
|
|
4072 args[4] = arg3;
|
|
|
4073 args[5] = arg4;
|
|
|
4074 args[6] = arg5;
|
|
|
4075 GCPRO1 (args[0]);
|
|
|
4076 gcpro1.nvars = 7;
|
|
|
4077 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4078 }
|
|
|
4079
|
|
|
4080 Lisp_Object
|
|
|
4081 call7 (Lisp_Object fn,
|
|
|
4082 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4083 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4084 Lisp_Object arg6)
|
|
|
4085 {
|
|
|
4086 /* This function can GC */
|
|
|
4087 struct gcpro gcpro1;
|
|
|
4088 Lisp_Object args[8];
|
|
|
4089 args[0] = fn;
|
|
|
4090 args[1] = arg0;
|
|
|
4091 args[2] = arg1;
|
|
|
4092 args[3] = arg2;
|
|
|
4093 args[4] = arg3;
|
|
|
4094 args[5] = arg4;
|
|
|
4095 args[6] = arg5;
|
|
|
4096 args[7] = arg6;
|
|
|
4097 GCPRO1 (args[0]);
|
|
|
4098 gcpro1.nvars = 8;
|
|
|
4099 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4100 }
|
|
|
4101
|
|
|
4102 Lisp_Object
|
|
|
4103 call8 (Lisp_Object fn,
|
|
|
4104 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4105 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4106 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4107 {
|
|
|
4108 /* This function can GC */
|
|
|
4109 struct gcpro gcpro1;
|
|
|
4110 Lisp_Object args[9];
|
|
|
4111 args[0] = fn;
|
|
|
4112 args[1] = arg0;
|
|
|
4113 args[2] = arg1;
|
|
|
4114 args[3] = arg2;
|
|
|
4115 args[4] = arg3;
|
|
|
4116 args[5] = arg4;
|
|
|
4117 args[6] = arg5;
|
|
|
4118 args[7] = arg6;
|
|
|
4119 args[8] = arg7;
|
|
|
4120 GCPRO1 (args[0]);
|
|
|
4121 gcpro1.nvars = 9;
|
|
|
4122 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4123 }
|
|
|
4124
|
|
|
4125 Lisp_Object
|
|
|
4126 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4127 {
|
|
|
4128 int speccount = specpdl_depth ();
|
|
|
4129 Lisp_Object val;
|
|
|
4130
|
|
|
4131 if (current_buffer != buf)
|
|
|
4132 {
|
|
|
4133 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4134 set_buffer_internal (buf);
|
|
|
4135 }
|
|
|
4136 val = call0 (fn);
|
|
|
4137 unbind_to (speccount, Qnil);
|
|
|
4138 return val;
|
|
|
4139 }
|
|
|
4140
|
|
|
4141 Lisp_Object
|
|
|
4142 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4143 Lisp_Object arg0)
|
|
|
4144 {
|
|
|
4145 int speccount = specpdl_depth ();
|
|
|
4146 Lisp_Object val;
|
|
|
4147
|
|
|
4148 if (current_buffer != buf)
|
|
|
4149 {
|
|
|
4150 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4151 set_buffer_internal (buf);
|
|
|
4152 }
|
|
|
4153 val = call1 (fn, arg0);
|
|
|
4154 unbind_to (speccount, Qnil);
|
|
|
4155 return val;
|
|
|
4156 }
|
|
|
4157
|
|
|
4158 Lisp_Object
|
|
|
4159 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4160 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4161 {
|
|
|
4162 int speccount = specpdl_depth ();
|
|
|
4163 Lisp_Object val;
|
|
|
4164
|
|
|
4165 if (current_buffer != buf)
|
|
|
4166 {
|
|
|
4167 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4168 set_buffer_internal (buf);
|
|
|
4169 }
|
|
|
4170 val = call2 (fn, arg0, arg1);
|
|
|
4171 unbind_to (speccount, Qnil);
|
|
|
4172 return val;
|
|
|
4173 }
|
|
|
4174
|
|
|
4175 Lisp_Object
|
|
|
4176 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4177 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4178 {
|
|
|
4179 int speccount = specpdl_depth ();
|
|
|
4180 Lisp_Object val;
|
|
|
4181
|
|
|
4182 if (current_buffer != buf)
|
|
|
4183 {
|
|
|
4184 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4185 set_buffer_internal (buf);
|
|
|
4186 }
|
|
|
4187 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4188 unbind_to (speccount, Qnil);
|
|
|
4189 return val;
|
|
|
4190 }
|
|
|
4191
|
|
|
4192 Lisp_Object
|
|
|
4193 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4194 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4195 Lisp_Object arg3)
|
|
|
4196 {
|
|
|
4197 int speccount = specpdl_depth ();
|
|
|
4198 Lisp_Object val;
|
|
|
4199
|
|
|
4200 if (current_buffer != buf)
|
|
|
4201 {
|
|
|
4202 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4203 set_buffer_internal (buf);
|
|
|
4204 }
|
|
|
4205 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4206 unbind_to (speccount, Qnil);
|
|
|
4207 return val;
|
|
|
4208 }
|
|
|
4209
|
|
|
4210 Lisp_Object
|
|
|
4211 call5_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4212 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4213 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
4214 {
|
|
|
4215 int speccount = specpdl_depth ();
|
|
|
4216 Lisp_Object val;
|
|
|
4217
|
|
|
4218 if (current_buffer != buf)
|
|
|
4219 {
|
|
|
4220 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4221 set_buffer_internal (buf);
|
|
|
4222 }
|
|
|
4223 val = call5 (fn, arg0, arg1, arg2, arg3, arg4);
|
|
|
4224 unbind_to (speccount, Qnil);
|
|
|
4225 return val;
|
|
|
4226 }
|
|
|
4227
|
|
|
4228 Lisp_Object
|
|
|
4229 call6_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4230 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4231 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4232 {
|
|
|
4233 int speccount = specpdl_depth ();
|
|
|
4234 Lisp_Object val;
|
|
|
4235
|
|
|
4236 if (current_buffer != buf)
|
|
|
4237 {
|
|
|
4238 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4239 set_buffer_internal (buf);
|
|
|
4240 }
|
|
|
4241 val = call6 (fn, arg0, arg1, arg2, arg3, arg4, arg5);
|
|
|
4242 unbind_to (speccount, Qnil);
|
|
|
4243 return val;
|
|
|
4244 }
|
|
|
4245
|
|
|
4246 Lisp_Object
|
|
|
4247 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4248 {
|
|
|
4249 int speccount = specpdl_depth ();
|
|
|
4250 Lisp_Object val;
|
|
|
4251
|
|
|
4252 if (current_buffer != buf)
|
|
|
4253 {
|
|
|
4254 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4255 set_buffer_internal (buf);
|
|
|
4256 }
|
|
|
4257 val = Feval (form);
|
|
|
4258 unbind_to (speccount, Qnil);
|
|
|
4259 return val;
|
|
|
4260 }
|
|
|
4261
|
|
|
4262
|
|
|
4263 /***** Error-catching front-ends to eval, funcall, apply */
|
|
|
4264
|
|
|
4265 /* Call function fn on no arguments, with condition handler */
|
|
|
4266 Lisp_Object
|
|
|
4267 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4268 {
|
|
|
4269 /* This function can GC */
|
|
|
4270 struct gcpro gcpro1;
|
|
|
4271 Lisp_Object args[2];
|
|
|
4272 args[0] = handler;
|
|
|
4273 args[1] = fn;
|
|
|
4274 GCPRO1 (args[0]);
|
|
|
4275 gcpro1.nvars = 2;
|
|
|
4276 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4277 }
|
|
|
4278
|
|
|
4279 /* Call function fn with argument arg0, with condition handler */
|
|
|
4280 Lisp_Object
|
|
|
4281 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4282 Lisp_Object arg0)
|
|
|
4283 {
|
|
|
4284 /* This function can GC */
|
|
|
4285 struct gcpro gcpro1;
|
|
|
4286 Lisp_Object args[3];
|
|
|
4287 args[0] = handler;
|
|
|
4288 args[1] = fn;
|
|
|
4289 args[2] = arg0;
|
|
|
4290 GCPRO1 (args[0]);
|
|
|
4291 gcpro1.nvars = 3;
|
|
|
4292 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4293 }
|
|
|
4294
|
|
|
4295
|
|
|
4296 /* The following functions provide you with error-trapping versions
|
|
|
4297 of the various front-ends above. They take an additional
|
|
|
4298 "warning_string" argument; if non-zero, a warning with this
|
|
|
4299 string and the actual error that occurred will be displayed
|
|
|
4300 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4301 QUIT is inhibited while these functions are running, and if
|
|
|
4302 an error occurs, Qunbound is returned instead of the normal
|
|
|
4303 return value.
|
|
|
4304 */
|
|
|
4305
|
|
|
4306 /* #### This stuff needs to catch throws as well. We need to
|
|
|
4307 improve internal_catch() so it can take a "catch anything"
|
|
|
4308 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4309
|
|
|
4310 static Lisp_Object
|
|
|
4311 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4312 {
|
|
|
4313 if (!NILP (errordata))
|
|
|
4314 {
|
|
|
4315 Lisp_Object args[2];
|
|
|
4316
|
|
|
4317 if (!NILP (arg))
|
|
|
4318 {
|
|
|
4319 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4320 args[0] = build_string (str);
|
|
|
4321 }
|
|
|
4322 else
|
|
|
4323 args[0] = build_string ("error");
|
|
|
4324 /* #### This should call
|
|
|
4325 (with-output-to-string (display-error errordata))
|
|
|
4326 but that stuff is all in Lisp currently. */
|
|
|
4327 args[1] = errordata;
|
|
|
4328 warn_when_safe_lispobj
|
|
|
4329 (Qerror, Qwarning,
|
|
|
4330 emacs_doprnt_string_lisp ((CONST Bufbyte *) "%s: %s",
|
|
|
4331 Qnil, -1, 2, args));
|
|
|
4332 }
|
|
|
4333 return Qunbound;
|
|
|
4334 }
|
|
|
4335
|
|
|
4336 static Lisp_Object
|
|
|
4337 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4338 {
|
|
|
4339 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4340 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4341 return caught_a_squirmer (errordata, arg);
|
|
|
4342 }
|
|
|
4343
|
|
|
4344 static Lisp_Object
|
|
|
4345 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4346 {
|
|
|
4347 Lisp_Object hook = Fcar (arg);
|
|
|
4348 arg = Fcdr (arg);
|
|
|
4349 /* Clear out the hook. */
|
|
|
4350 Fset (hook, Qnil);
|
|
|
4351 return caught_a_squirmer (errordata, arg);
|
|
|
4352 }
|
|
|
4353
|
|
|
4354 static Lisp_Object
|
|
|
4355 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4356 Lisp_Object arg)
|
|
|
4357 {
|
|
|
4358 Lisp_Object hook = Fcar (arg);
|
|
|
4359 arg = Fcdr (arg);
|
|
|
4360 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4361 /* Clear out the hook. */
|
|
|
4362 Fset (hook, Qnil);
|
|
|
4363 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4364 }
|
|
|
4365
|
|
|
4366 static Lisp_Object
|
|
|
4367 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4368 {
|
|
|
4369 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4370 }
|
|
|
4371
|
|
|
4372 Lisp_Object
|
|
|
4373 eval_in_buffer_trapping_errors (CONST char *warning_string,
|
|
|
4374 struct buffer *buf, Lisp_Object form)
|
|
|
4375 {
|
|
|
4376 int speccount = specpdl_depth ();
|
|
|
4377 Lisp_Object tem;
|
|
|
4378 Lisp_Object buffer = Qnil;
|
|
|
4379 Lisp_Object cons;
|
|
|
4380 Lisp_Object opaque;
|
|
|
4381 struct gcpro gcpro1, gcpro2;
|
|
|
4382
|
|
|
4383 XSETBUFFER (buffer, buf);
|
|
|
4384
|
|
|
4385 specbind (Qinhibit_quit, Qt);
|
|
|
4386 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4387
|
|
|
4388 cons = noseeum_cons (buffer, form);
|
|
|
4389 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4390 GCPRO2 (cons, opaque);
|
|
|
4391 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4392 tem = condition_case_1 (Qerror,
|
|
|
4393 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4394 caught_a_squirmer, opaque);
|
|
|
4395 free_cons (XCONS (cons));
|
|
|
4396 if (OPAQUEP (opaque))
|
|
|
4397 free_opaque_ptr (opaque);
|
|
|
4398 UNGCPRO;
|
|
|
4399
|
|
|
4400 /* gc_currently_forbidden = 0; */
|
|
|
4401 return unbind_to (speccount, tem);
|
|
|
4402 }
|
|
|
4403
|
|
|
4404 static Lisp_Object
|
|
|
4405 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4406 {
|
|
|
4407 /* This function can GC */
|
|
|
4408 run_hook (hook_symbol);
|
|
|
4409 return Qnil;
|
|
|
4410 }
|
|
|
4411
|
|
|
4412 Lisp_Object
|
|
|
4413 run_hook_trapping_errors (CONST char *warning_string, Lisp_Object hook_symbol)
|
|
|
4414 {
|
|
|
4415 int speccount = specpdl_depth ();
|
|
|
4416 Lisp_Object tem;
|
|
|
4417 Lisp_Object opaque;
|
|
|
4418 struct gcpro gcpro1;
|
|
|
4419
|
|
|
4420 if (!initialized || preparing_for_armageddon)
|
|
|
4421 return Qnil;
|
|
|
4422 tem = find_symbol_value (hook_symbol);
|
|
|
4423 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4424 return Qnil;
|
|
|
4425
|
|
|
4426 specbind (Qinhibit_quit, Qt);
|
|
|
4427
|
|
|
4428 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4429 GCPRO1 (opaque);
|
|
|
4430 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4431 tem = condition_case_1 (Qerror,
|
|
|
4432 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4433 caught_a_squirmer, opaque);
|
|
|
4434 if (OPAQUEP (opaque))
|
|
|
4435 free_opaque_ptr (opaque);
|
|
|
4436 UNGCPRO;
|
|
|
4437
|
|
|
4438 return unbind_to (speccount, tem);
|
|
|
4439 }
|
|
|
4440
|
|
|
4441 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4442 if an error occurs. */
|
|
|
4443
|
|
|
4444 Lisp_Object
|
|
|
4445 safe_run_hook_trapping_errors (CONST char *warning_string,
|
|
|
4446 Lisp_Object hook_symbol,
|
|
|
4447 int allow_quit)
|
|
|
4448 {
|
|
|
4449 int speccount = specpdl_depth ();
|
|
|
4450 Lisp_Object tem;
|
|
|
4451 Lisp_Object cons = Qnil;
|
|
|
4452 struct gcpro gcpro1;
|
|
|
4453
|
|
|
4454 if (!initialized || preparing_for_armageddon)
|
|
|
4455 return Qnil;
|
|
|
4456 tem = find_symbol_value (hook_symbol);
|
|
|
4457 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4458 return Qnil;
|
|
|
4459
|
|
|
4460 if (!allow_quit)
|
|
|
4461 specbind (Qinhibit_quit, Qt);
|
|
|
4462
|
|
|
4463 cons = noseeum_cons (hook_symbol,
|
|
|
4464 warning_string ? make_opaque_ptr (warning_string)
|
|
|
4465 : Qnil);
|
|
|
4466 GCPRO1 (cons);
|
|
|
4467 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4468 tem = condition_case_1 (Qerror,
|
|
|
4469 catch_them_squirmers_run_hook,
|
|
|
4470 hook_symbol,
|
|
|
4471 allow_quit ?
|
|
|
4472 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4473 safe_run_hook_caught_a_squirmer,
|
|
|
4474 cons);
|
|
|
4475 if (OPAQUEP (XCDR (cons)))
|
|
|
4476 free_opaque_ptr (XCDR (cons));
|
|
|
4477 free_cons (XCONS (cons));
|
|
|
4478 UNGCPRO;
|
|
|
4479
|
|
|
4480 return unbind_to (speccount, tem);
|
|
|
4481 }
|
|
|
4482
|
|
|
4483 static Lisp_Object
|
|
|
4484 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4485 {
|
|
|
4486 /* This function can GC */
|
|
|
4487 return call0 (function);
|
|
|
4488 }
|
|
|
4489
|
|
|
4490 Lisp_Object
|
|
|
4491 call0_trapping_errors (CONST char *warning_string, Lisp_Object function)
|
|
|
4492 {
|
|
|
4493 int speccount = specpdl_depth ();
|
|
|
4494 Lisp_Object tem;
|
|
|
4495 Lisp_Object opaque = Qnil;
|
|
|
4496 struct gcpro gcpro1, gcpro2;
|
|
|
4497
|
|
|
4498 if (SYMBOLP (function))
|
|
|
4499 {
|
|
|
4500 tem = XSYMBOL (function)->function;
|
|
|
4501 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4502 return (Qnil);
|
|
|
4503 }
|
|
|
4504
|
|
|
4505 GCPRO2 (opaque, function);
|
|
|
4506 specbind (Qinhibit_quit, Qt);
|
|
|
4507 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4508
|
|
|
4509 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4510 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4511 tem = condition_case_1 (Qerror,
|
|
|
4512 catch_them_squirmers_call0, function,
|
|
|
4513 caught_a_squirmer, opaque);
|
|
|
4514 if (OPAQUEP (opaque))
|
|
|
4515 free_opaque_ptr (opaque);
|
|
|
4516 UNGCPRO;
|
|
|
4517
|
|
|
4518 /* gc_currently_forbidden = 0; */
|
|
|
4519 return unbind_to (speccount, tem);
|
|
|
4520 }
|
|
|
4521
|
|
|
4522 static Lisp_Object
|
|
|
4523 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4524 {
|
|
|
4525 /* This function can GC */
|
|
|
4526 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4527 }
|
|
|
4528
|
|
|
4529 static Lisp_Object
|
|
|
4530 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4531 {
|
|
|
4532 /* This function can GC */
|
|
|
4533 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4534 }
|
|
|
4535
|
|
|
4536 Lisp_Object
|
|
|
4537 call1_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4538 Lisp_Object object)
|
|
|
4539 {
|
|
|
4540 int speccount = specpdl_depth ();
|
|
|
4541 Lisp_Object tem;
|
|
|
4542 Lisp_Object cons = Qnil;
|
|
|
4543 Lisp_Object opaque = Qnil;
|
|
|
4544 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4545
|
|
|
4546 if (SYMBOLP (function))
|
|
|
4547 {
|
|
|
4548 tem = XSYMBOL (function)->function;
|
|
|
4549 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4550 return (Qnil);
|
|
|
4551 }
|
|
|
4552
|
|
|
4553 GCPRO4 (cons, opaque, function, object);
|
|
|
4554
|
|
|
4555 specbind (Qinhibit_quit, Qt);
|
|
|
4556 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4557
|
|
|
4558 cons = noseeum_cons (function, object);
|
|
|
4559 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4560 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4561 tem = condition_case_1 (Qerror,
|
|
|
4562 catch_them_squirmers_call1, cons,
|
|
|
4563 caught_a_squirmer, opaque);
|
|
|
4564 if (OPAQUEP (opaque))
|
|
|
4565 free_opaque_ptr (opaque);
|
|
|
4566 free_cons (XCONS (cons));
|
|
|
4567 UNGCPRO;
|
|
|
4568
|
|
|
4569 /* gc_currently_forbidden = 0; */
|
|
|
4570 return unbind_to (speccount, tem);
|
|
|
4571 }
|
|
|
4572
|
|
|
4573 Lisp_Object
|
|
|
4574 call2_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4575 Lisp_Object object1, Lisp_Object object2)
|
|
|
4576 {
|
|
|
4577 int speccount = specpdl_depth ();
|
|
|
4578 Lisp_Object tem;
|
|
|
4579 Lisp_Object cons = Qnil;
|
|
|
4580 Lisp_Object opaque = Qnil;
|
|
|
4581 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4582
|
|
|
4583 if (SYMBOLP (function))
|
|
|
4584 {
|
|
|
4585 tem = XSYMBOL (function)->function;
|
|
|
4586 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4587 return (Qnil);
|
|
|
4588 }
|
|
|
4589
|
|
|
4590 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4591 specbind (Qinhibit_quit, Qt);
|
|
|
4592 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4593
|
|
|
4594 cons = list3 (function, object1, object2);
|
|
|
4595 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4596 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4597 tem = condition_case_1 (Qerror,
|
|
|
4598 catch_them_squirmers_call2, cons,
|
|
|
4599 caught_a_squirmer, opaque);
|
|
|
4600 if (OPAQUEP (opaque))
|
|
|
4601 free_opaque_ptr (opaque);
|
|
|
4602 free_list (cons);
|
|
|
4603 UNGCPRO;
|
|
|
4604
|
|
|
4605 /* gc_currently_forbidden = 0; */
|
|
|
4606 return unbind_to (speccount, tem);
|
|
|
4607 }
|
|
|
4608
|
|
|
4609
|
|
|
4610 /**********************************************************************/
|
|
|
4611 /* The special binding stack */
|
|
|
4612 /**********************************************************************/
|
|
|
4613
|
|
2
|
4614 #define min_max_specpdl_size 400
|
|
|
4615
|
|
0
|
4616 static void
|
|
|
4617 grow_specpdl (void)
|
|
|
4618 {
|
|
|
4619 if (specpdl_size >= max_specpdl_size)
|
|
|
4620 {
|
|
2
|
4621 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4622 max_specpdl_size = min_max_specpdl_size;
|
|
0
|
4623 if (specpdl_size >= max_specpdl_size)
|
|
|
4624 {
|
|
|
4625 if (!NILP (Vdebug_on_error) || !NILP (Vdebug_on_signal))
|
|
|
4626 /* Leave room for some specpdl in the debugger. */
|
|
|
4627 max_specpdl_size = specpdl_size + 100;
|
|
|
4628 continuable_error
|
|
|
4629 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4630 }
|
|
|
4631 }
|
|
|
4632 specpdl_size *= 2;
|
|
|
4633 if (specpdl_size > max_specpdl_size)
|
|
|
4634 specpdl_size = max_specpdl_size;
|
|
|
4635 specpdl = ((struct specbinding *)
|
|
|
4636 xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)));
|
|
|
4637 specpdl_ptr = specpdl + specpdl_depth_counter;
|
|
|
4638 }
|
|
|
4639
|
|
|
4640
|
|
|
4641 /* Handle unbinding buffer-local variables */
|
|
|
4642 static Lisp_Object
|
|
|
4643 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4644 {
|
|
|
4645 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4646 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4647 struct Lisp_Cons *victim = XCONS (ovalue);
|
|
|
4648 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4649 ovalue = victim->cdr;
|
|
|
4650
|
|
|
4651 free_cons (victim);
|
|
|
4652
|
|
|
4653 if (NILP (buf))
|
|
|
4654 {
|
|
|
4655 /* Deleted buffer -- do nothing */
|
|
|
4656 }
|
|
|
4657 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4658 {
|
|
|
4659 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4660 * (kill-local-variable can do this.)
|
|
|
4661 * Do nothing in this case.
|
|
|
4662 */
|
|
|
4663 }
|
|
|
4664 else if (EQ (buf, current))
|
|
|
4665 Fset (symbol, ovalue);
|
|
|
4666 else
|
|
|
4667 {
|
|
|
4668 /* Urk! Somebody switched buffers */
|
|
|
4669 struct gcpro gcpro1;
|
|
|
4670 GCPRO1 (current);
|
|
|
4671 Fset_buffer (buf);
|
|
|
4672 Fset (symbol, ovalue);
|
|
|
4673 Fset_buffer (current);
|
|
|
4674 UNGCPRO;
|
|
|
4675 }
|
|
|
4676 return (symbol);
|
|
|
4677 }
|
|
|
4678
|
|
|
4679 static Lisp_Object
|
|
|
4680 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4681 {
|
|
|
4682 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4683 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4684
|
|
|
4685 buffer = get_buffer (buffer, 0);
|
|
|
4686 if (NILP (buffer))
|
|
|
4687 {
|
|
|
4688 /* Deleted buffer -- do nothing */
|
|
|
4689 }
|
|
|
4690 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4691 {
|
|
|
4692 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4693 * (kill-local-variable can do this.)
|
|
|
4694 * Do nothing in this case.
|
|
|
4695 */
|
|
|
4696 }
|
|
|
4697 else if (EQ (buffer, current))
|
|
|
4698 Fkill_local_variable (symbol);
|
|
|
4699 else
|
|
|
4700 {
|
|
|
4701 /* Urk! Somebody switched buffers */
|
|
|
4702 struct gcpro gcpro1;
|
|
|
4703 GCPRO1 (current);
|
|
|
4704 Fset_buffer (buffer);
|
|
|
4705 Fkill_local_variable (symbol);
|
|
|
4706 Fset_buffer (current);
|
|
|
4707 UNGCPRO;
|
|
|
4708 }
|
|
|
4709 return (symbol);
|
|
|
4710 }
|
|
|
4711
|
|
|
4712
|
|
|
4713 /* Don't want to include buffer.h just for this */
|
|
|
4714 extern struct buffer *current_buffer;
|
|
|
4715
|
|
|
4716 void
|
|
|
4717 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4718 {
|
|
|
4719 int buffer_local;
|
|
|
4720
|
|
|
4721 CHECK_SYMBOL (symbol);
|
|
|
4722
|
|
|
4723 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4724 grow_specpdl ();
|
|
|
4725
|
|
|
4726 buffer_local = symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4727 if (buffer_local == 0)
|
|
|
4728 {
|
|
|
4729 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4730 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4731 }
|
|
|
4732 else if (buffer_local > 0)
|
|
|
4733 {
|
|
|
4734 /* Already buffer-local */
|
|
|
4735 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4736 find_symbol_value (symbol));
|
|
|
4737 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4738 }
|
|
|
4739 else
|
|
|
4740 {
|
|
|
4741 /* About to become buffer-local */
|
|
|
4742 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4743 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4744 }
|
|
|
4745
|
|
|
4746 specpdl_ptr->symbol = symbol;
|
|
|
4747 specpdl_ptr++;
|
|
|
4748 specpdl_depth_counter++;
|
|
|
4749
|
|
|
4750 Fset (symbol, value);
|
|
|
4751 }
|
|
|
4752
|
|
|
4753 void
|
|
|
4754 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4755 Lisp_Object arg)
|
|
|
4756 {
|
|
|
4757 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4758 grow_specpdl ();
|
|
|
4759 specpdl_ptr->func = function;
|
|
|
4760 specpdl_ptr->symbol = Qnil;
|
|
|
4761 specpdl_ptr->old_value = arg;
|
|
|
4762 specpdl_ptr++;
|
|
|
4763 specpdl_depth_counter++;
|
|
|
4764 }
|
|
|
4765
|
|
|
4766 extern int check_sigio (void);
|
|
|
4767
|
|
|
4768 Lisp_Object
|
|
|
4769 unbind_to (int count, Lisp_Object value)
|
|
|
4770 {
|
|
|
4771 int quitf;
|
|
|
4772 struct gcpro gcpro1;
|
|
|
4773
|
|
|
4774 GCPRO1 (value);
|
|
|
4775
|
|
|
4776 check_quit (); /* make Vquit_flag accurate */
|
|
|
4777 quitf = !NILP (Vquit_flag);
|
|
|
4778 Vquit_flag = Qnil;
|
|
|
4779
|
|
|
4780 while (specpdl_depth_counter != count)
|
|
|
4781 {
|
|
|
4782 Lisp_Object ovalue;
|
|
|
4783 --specpdl_ptr;
|
|
|
4784 --specpdl_depth_counter;
|
|
|
4785
|
|
|
4786 ovalue = specpdl_ptr->old_value;
|
|
|
4787 if (specpdl_ptr->func != 0)
|
|
|
4788 /* An unwind-protect */
|
|
|
4789 (*specpdl_ptr->func) (ovalue);
|
|
|
4790 else
|
|
|
4791 Fset (specpdl_ptr->symbol, ovalue);
|
|
|
4792
|
|
|
4793 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4794 /* There should never be anything here for us to remove.
|
|
|
4795 If so, it indicates a logic error in Emacs. Catches
|
|
|
4796 should get removed when a throw or signal occurs, or
|
|
|
4797 when a catch or condition-case exits normally. But
|
|
|
4798 it's too dangerous to just remove this code. --ben */
|
|
|
4799
|
|
|
4800 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4801 Braino on mly's part? */
|
|
|
4802 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4803 that catch can't possibly still be valid. */
|
|
|
4804 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4805 {
|
|
|
4806 catchlist = catchlist->next;
|
|
|
4807 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4808 }
|
|
|
4809 #endif
|
|
|
4810 }
|
|
|
4811 if (quitf)
|
|
|
4812 Vquit_flag = Qt;
|
|
|
4813
|
|
|
4814 UNGCPRO;
|
|
|
4815
|
|
|
4816 return (value);
|
|
|
4817 }
|
|
|
4818
|
|
|
4819
|
|
|
4820 int
|
|
|
4821 specpdl_depth (void)
|
|
|
4822 {
|
|
|
4823 return (specpdl_depth_counter);
|
|
|
4824 }
|
|
|
4825
|
|
|
4826
|
|
|
4827 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4828 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4829
|
|
|
4830 Lisp_Object
|
|
|
4831 top_level_value (Lisp_Object symbol)
|
|
|
4832 {
|
|
|
4833 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4834
|
|
|
4835 CHECK_SYMBOL (symbol);
|
|
|
4836 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4837 {
|
|
|
4838 if (EQ (ptr->symbol, symbol))
|
|
|
4839 return ptr->old_value;
|
|
|
4840 }
|
|
|
4841 return XSYMBOL (symbol)->value;
|
|
|
4842 }
|
|
|
4843
|
|
|
4844 #if 0
|
|
|
4845
|
|
|
4846 Lisp_Object
|
|
|
4847 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4848 {
|
|
|
4849 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4850
|
|
|
4851 CHECK_SYMBOL (symbol);
|
|
|
4852 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4853 {
|
|
|
4854 if (EQ (ptr->symbol, symbol))
|
|
|
4855 {
|
|
|
4856 ptr->old_value = newval;
|
|
|
4857 return newval;
|
|
|
4858 }
|
|
|
4859 }
|
|
|
4860 return Fset (symbol, newval);
|
|
|
4861 }
|
|
|
4862
|
|
|
4863 #endif /* 0 */
|
|
|
4864
|
|
|
4865
|
|
|
4866 /**********************************************************************/
|
|
|
4867 /* Backtraces */
|
|
|
4868 /**********************************************************************/
|
|
|
4869
|
|
20
|
4870 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4871 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4872 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4873 */
|
|
|
4874 (level, flag))
|
|
0
|
4875 {
|
|
|
4876 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4877 REGISTER int i;
|
|
|
4878
|
|
|
4879 CHECK_INT (level);
|
|
|
4880
|
|
|
4881 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4882 {
|
|
|
4883 backlist = backlist->next;
|
|
|
4884 }
|
|
|
4885
|
|
|
4886 if (backlist)
|
|
|
4887 backlist->debug_on_exit = !NILP (flag);
|
|
|
4888
|
|
|
4889 return flag;
|
|
|
4890 }
|
|
|
4891
|
|
|
4892 static void
|
|
|
4893 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4894 {
|
|
|
4895 int printing_bindings = 0;
|
|
|
4896
|
|
|
4897 for (; speccount > speclimit; speccount--)
|
|
|
4898 {
|
|
|
4899 if (specpdl[speccount - 1].func == 0
|
|
|
4900 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4901 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4902 {
|
|
|
4903 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4904 stream);
|
|
|
4905 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4906 printing_bindings = 1;
|
|
|
4907 }
|
|
|
4908 else
|
|
|
4909 {
|
|
|
4910 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4911 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4912 printing_bindings = 0;
|
|
|
4913 }
|
|
|
4914 }
|
|
|
4915 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4916 }
|
|
|
4917
|
|
20
|
4918 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4919 Print a trace of Lisp function calls currently active.
|
|
|
4920 Option arg STREAM specifies the output stream to send the backtrace to,
|
|
|
4921 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4922 DETAILED means show places where currently active variable bindings,
|
|
|
4923 catches, condition-cases, and unwind-protects were made as well as
|
|
|
4924 function calls.
|
|
20
|
4925 */
|
|
|
4926 (stream, detailed))
|
|
0
|
4927 {
|
|
|
4928 struct backtrace *backlist = backtrace_list;
|
|
|
4929 struct catchtag *catches = catchlist;
|
|
|
4930 int speccount = specpdl_depth_counter;
|
|
|
4931
|
|
|
4932 int old_nl = print_escape_newlines;
|
|
|
4933 int old_pr = print_readably;
|
|
|
4934 Lisp_Object old_level = Vprint_level;
|
|
|
4935 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4936 struct gcpro gcpro1, gcpro2;
|
|
|
4937
|
|
|
4938 /* We can't allow quits in here because that could cause the values
|
|
|
4939 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4940 Normally we would use a record_unwind_protect but that would
|
|
|
4941 screw up the functioning of this function. */
|
|
|
4942 Vinhibit_quit = Qt;
|
|
|
4943
|
|
|
4944 entering_debugger = 0;
|
|
|
4945
|
|
|
4946 Vprint_level = make_int (3);
|
|
|
4947 print_readably = 0;
|
|
|
4948 print_escape_newlines = 1;
|
|
|
4949
|
|
|
4950 GCPRO2 (stream, old_level);
|
|
|
4951
|
|
|
4952 if (NILP (stream))
|
|
|
4953 stream = Vstandard_output;
|
|
|
4954 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4955 stream = Fselected_frame (Qnil);
|
|
|
4956
|
|
|
4957 for (;;)
|
|
|
4958 {
|
|
|
4959 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4960 {
|
|
|
4961 int catchpdl = catches->pdlcount;
|
|
|
4962 if (specpdl[catchpdl].func == condition_case_unwind
|
|
|
4963 && speccount > catchpdl)
|
|
|
4964 /* This is a condition-case catchpoint */
|
|
|
4965 catchpdl = catchpdl + 1;
|
|
|
4966
|
|
|
4967 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4968
|
|
|
4969 speccount = catches->pdlcount;
|
|
|
4970 if (catchpdl == speccount)
|
|
|
4971 {
|
|
|
4972 write_c_string (" # (catch ", stream);
|
|
|
4973 Fprin1 (catches->tag, stream);
|
|
|
4974 write_c_string (" ...)\n", stream);
|
|
|
4975 }
|
|
|
4976 else
|
|
|
4977 {
|
|
|
4978 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4979 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4980 write_c_string (")\n", stream);
|
|
|
4981 }
|
|
|
4982 catches = catches->next;
|
|
|
4983 }
|
|
|
4984 else if (!backlist)
|
|
|
4985 break;
|
|
|
4986 else
|
|
|
4987 {
|
|
|
4988 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4989 {
|
|
|
4990 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4991 speccount = backlist->pdlcount;
|
|
|
4992 }
|
|
|
4993 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4994 stream);
|
|
|
4995 if (backlist->nargs == UNEVALLED)
|
|
|
4996 {
|
|
|
4997 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4998 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4999 }
|
|
|
5000 else
|
|
|
5001 {
|
|
|
5002 Lisp_Object tem = *backlist->function;
|
|
|
5003 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
5004 write_c_string ("(", stream);
|
|
|
5005 if (backlist->nargs == MANY)
|
|
|
5006 {
|
|
|
5007 int i;
|
|
|
5008 Lisp_Object tail = Qnil;
|
|
|
5009 struct gcpro ngcpro1;
|
|
|
5010
|
|
|
5011 NGCPRO1 (tail);
|
|
|
5012 for (tail = *backlist->args, i = 0;
|
|
|
5013 !NILP (tail);
|
|
|
5014 tail = Fcdr (tail), i++)
|
|
|
5015 {
|
|
|
5016 if (i != 0) write_c_string (" ", stream);
|
|
|
5017 Fprin1 (Fcar (tail), stream);
|
|
|
5018 }
|
|
|
5019 NUNGCPRO;
|
|
|
5020 }
|
|
|
5021 else
|
|
|
5022 {
|
|
|
5023 int i;
|
|
|
5024 for (i = 0; i < backlist->nargs; i++)
|
|
|
5025 {
|
|
|
5026 if (i != 0) write_c_string (" ", stream);
|
|
|
5027 Fprin1 (backlist->args[i], stream);
|
|
|
5028 }
|
|
|
5029 }
|
|
|
5030 }
|
|
|
5031 write_c_string (")\n", stream);
|
|
|
5032 backlist = backlist->next;
|
|
|
5033 }
|
|
|
5034 }
|
|
|
5035 Vprint_level = old_level;
|
|
|
5036 print_readably = old_pr;
|
|
|
5037 print_escape_newlines = old_nl;
|
|
|
5038 UNGCPRO;
|
|
|
5039 Vinhibit_quit = oiq;
|
|
|
5040 return Qnil;
|
|
|
5041 }
|
|
|
5042
|
|
|
5043
|
|
20
|
5044 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
5045 Return the function and arguments N frames up from current execution point.
|
|
|
5046 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
5047 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
5048 If that frame has evaluated its arguments and called its function already,
|
|
|
5049 the value is (t FUNCTION ARG-VALUES...).
|
|
|
5050 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
5051 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
5052 or a lambda expression for macro calls.
|
|
|
5053 If N is more than the number of frames, the value is nil.
|
|
20
|
5054 */
|
|
|
5055 (nframes))
|
|
0
|
5056 {
|
|
|
5057 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
5058 REGISTER int i;
|
|
|
5059 Lisp_Object tem;
|
|
|
5060
|
|
|
5061 CHECK_NATNUM (nframes);
|
|
|
5062
|
|
|
5063 /* Find the frame requested. */
|
|
|
5064 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
5065 backlist = backlist->next;
|
|
|
5066
|
|
|
5067 if (!backlist)
|
|
|
5068 return Qnil;
|
|
|
5069 if (backlist->nargs == UNEVALLED)
|
|
|
5070 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
5071 else
|
|
|
5072 {
|
|
|
5073 if (backlist->nargs == MANY)
|
|
|
5074 tem = *backlist->args;
|
|
|
5075 else
|
|
|
5076 tem = Flist (backlist->nargs, backlist->args);
|
|
|
5077
|
|
|
5078 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
5079 }
|
|
|
5080 }
|
|
|
5081
|
|
|
5082
|
|
|
5083 /**********************************************************************/
|
|
|
5084 /* Warnings */
|
|
|
5085 /**********************************************************************/
|
|
|
5086
|
|
|
5087 void
|
|
|
5088 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
5089 Lisp_Object obj)
|
|
|
5090 {
|
|
|
5091 obj = list1 (list3 (class, level, obj));
|
|
|
5092 if (NILP (Vpending_warnings))
|
|
|
5093 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
5094 else
|
|
|
5095 {
|
|
|
5096 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
5097 Vpending_warnings_tail = obj;
|
|
|
5098 }
|
|
|
5099 }
|
|
|
5100
|
|
|
5101 /* #### This should probably accept Lisp objects; but then we have
|
|
|
5102 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
5103
|
|
|
5104 An alternative approach is to just pass some non-string type of
|
|
|
5105 Lisp Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
5106 automatically be called when it is safe to do so. */
|
|
|
5107
|
|
|
5108 void
|
|
|
5109 warn_when_safe (Lisp_Object class, Lisp_Object level, CONST char *fmt, ...)
|
|
|
5110 {
|
|
|
5111 Lisp_Object obj;
|
|
|
5112 va_list args;
|
|
|
5113
|
|
|
5114 va_start (args, fmt);
|
|
|
5115 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt),
|
|
|
5116 Qnil, -1, args);
|
|
|
5117 va_end (args);
|
|
|
5118
|
|
|
5119 warn_when_safe_lispobj (class, level, obj);
|
|
|
5120 }
|
|
|
5121
|
|
|
5122
|
|
|
5123
|
|
|
5124
|
|
|
5125 /**********************************************************************/
|
|
|
5126 /* Initialization */
|
|
|
5127 /**********************************************************************/
|
|
|
5128
|
|
|
5129 void
|
|
|
5130 syms_of_eval (void)
|
|
|
5131 {
|
|
|
5132 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5133 defsymbol (&Qautoload, "autoload");
|
|
|
5134 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5135 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5136 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5137 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5138 defsymbol (&Qdebugger, "debugger");
|
|
|
5139 defsymbol (&Qmacro, "macro");
|
|
|
5140 defsymbol (&Qand_rest, "&rest");
|
|
|
5141 defsymbol (&Qand_optional, "&optional");
|
|
|
5142 /* Note that the process code also uses Qexit */
|
|
|
5143 defsymbol (&Qexit, "exit");
|
|
|
5144 defsymbol (&Qsetq, "setq");
|
|
|
5145 defsymbol (&Qinteractive, "interactive");
|
|
|
5146 defsymbol (&Qcommandp, "commandp");
|
|
|
5147 defsymbol (&Qdefun, "defun");
|
|
|
5148 defsymbol (&Qprogn, "progn");
|
|
|
5149 defsymbol (&Qvalues, "values");
|
|
|
5150 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5151 defsymbol (&Qrun_hooks, "run-hooks");
|
|
|
5152
|
|
20
|
5153 DEFSUBR (For);
|
|
|
5154 DEFSUBR (Fand);
|
|
|
5155 DEFSUBR (Fif);
|
|
|
5156 DEFSUBR (Fcond);
|
|
|
5157 DEFSUBR (Fprogn);
|
|
|
5158 DEFSUBR (Fprog1);
|
|
|
5159 DEFSUBR (Fprog2);
|
|
|
5160 DEFSUBR (Fsetq);
|
|
|
5161 DEFSUBR (Fquote);
|
|
|
5162 DEFSUBR (Ffunction);
|
|
|
5163 DEFSUBR (Fdefun);
|
|
|
5164 DEFSUBR (Fdefmacro);
|
|
|
5165 DEFSUBR (Fdefvar);
|
|
|
5166 DEFSUBR (Fdefconst);
|
|
|
5167 DEFSUBR (Fuser_variable_p);
|
|
|
5168 DEFSUBR (Flet);
|
|
|
5169 DEFSUBR (FletX);
|
|
|
5170 DEFSUBR (Fwhile);
|
|
|
5171 DEFSUBR (Fmacroexpand_internal);
|
|
|
5172 DEFSUBR (Fcatch);
|
|
|
5173 DEFSUBR (Fthrow);
|
|
|
5174 DEFSUBR (Funwind_protect);
|
|
|
5175 DEFSUBR (Fcondition_case);
|
|
|
5176 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5177 DEFSUBR (Fsignal);
|
|
|
5178 DEFSUBR (Finteractive_p);
|
|
149
|
5179 DEFSUBR (Fstrerror);
|
|
20
|
5180 DEFSUBR (Fcommandp);
|
|
|
5181 DEFSUBR (Fcommand_execute);
|
|
|
5182 DEFSUBR (Fautoload);
|
|
|
5183 DEFSUBR (Feval);
|
|
|
5184 DEFSUBR (Fapply);
|
|
|
5185 DEFSUBR (Ffuncall);
|
|
|
5186 DEFSUBR (Ffunction_min_args);
|
|
|
5187 DEFSUBR (Ffunction_max_args);
|
|
|
5188 DEFSUBR (Frun_hooks);
|
|
|
5189 DEFSUBR (Frun_hook_with_args);
|
|
|
5190 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5191 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5192 DEFSUBR (Ffetch_bytecode);
|
|
|
5193 DEFSUBR (Fbacktrace_debug);
|
|
|
5194 DEFSUBR (Fbacktrace);
|
|
|
5195 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5196 }
|
|
|
5197
|
|
|
5198 void
|
|
|
5199 reinit_eval (void)
|
|
|
5200 {
|
|
|
5201 specpdl_ptr = specpdl;
|
|
|
5202 specpdl_depth_counter = 0;
|
|
|
5203 catchlist = 0;
|
|
|
5204 Vcondition_handlers = Qnil;
|
|
|
5205 backtrace_list = 0;
|
|
|
5206 Vquit_flag = Qnil;
|
|
|
5207 debug_on_next_call = 0;
|
|
|
5208 lisp_eval_depth = 0;
|
|
|
5209 entering_debugger = 0;
|
|
|
5210 }
|
|
|
5211
|
|
|
5212 void
|
|
|
5213 vars_of_eval (void)
|
|
|
5214 {
|
|
|
5215 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5216 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5217 */ );
|
|
|
5218
|
|
|
5219 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5220 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5221 This limit is to catch infinite recursions for you before they cause
|
|
|
5222 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5223 You can safely make it considerably larger than its default value,
|
|
|
5224 if that proves inconveniently small.
|
|
|
5225 */ );
|
|
|
5226
|
|
|
5227 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5228 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5229 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5230 */ );
|
|
|
5231 Vquit_flag = Qnil;
|
|
|
5232
|
|
|
5233 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5234 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5235 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5236 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5237 To prevent this happening, set `quit-flag' to nil
|
|
|
5238 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5239 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5240 an X frame.
|
|
|
5241 */ );
|
|
|
5242 Vinhibit_quit = Qnil;
|
|
|
5243
|
|
|
5244 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5245 *Non-nil means automatically display a backtrace buffer
|
|
|
5246 after any error that is not handled by a `condition-case'.
|
|
|
5247 If the value is a list, an error only means to display a backtrace
|
|
|
5248 if one of its condition symbols appears in the list.
|
|
|
5249 See also variable `stack-trace-on-signal'.
|
|
|
5250 */ );
|
|
|
5251 Vstack_trace_on_error = Qnil;
|
|
|
5252
|
|
|
5253 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5254 *Non-nil means automatically display a backtrace buffer
|
|
|
5255 after any error that is signalled, whether or not it is handled by
|
|
|
5256 a `condition-case'.
|
|
|
5257 If the value is a list, an error only means to display a backtrace
|
|
|
5258 if one of its condition symbols appears in the list.
|
|
|
5259 See also variable `stack-trace-on-error'.
|
|
|
5260 */ );
|
|
|
5261 Vstack_trace_on_signal = Qnil;
|
|
|
5262
|
|
163
|
5263 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5264 *List of errors for which the debugger should not be called.
|
|
|
5265 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5266 If any element applies to a given error, that error skips the debugger
|
|
|
5267 and just returns to top level.
|
|
|
5268 This overrides the variable `debug-on-error'.
|
|
|
5269 It does not apply to errors handled by `condition-case'.
|
|
|
5270 */ );
|
|
|
5271 Vdebug_ignored_errors = Qnil;
|
|
|
5272
|
|
0
|
5273 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5274 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5275 The debugger will not be entered if the error is handled by
|
|
|
5276 a `condition-case'.
|
|
|
5277 If the value is a list, an error only means to enter the debugger
|
|
|
5278 if one of its condition symbols appears in the list.
|
|
|
5279 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5280 */ );
|
|
|
5281 Vdebug_on_error = Qnil;
|
|
|
5282
|
|
|
5283 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5284 *Non-nil means enter debugger if an error is signalled.
|
|
|
5285 The debugger will be entered whether or not the error is handled by
|
|
|
5286 a `condition-case'.
|
|
|
5287 If the value is a list, an error only means to enter the debugger
|
|
|
5288 if one of its condition symbols appears in the list.
|
|
|
5289 See also variable `debug-on-quit'.
|
|
|
5290 */ );
|
|
|
5291 Vdebug_on_signal = Qnil;
|
|
|
5292
|
|
|
5293 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5294 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5295 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5296 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5297 control-shift-G to signal a critical quit.
|
|
|
5298 */ );
|
|
|
5299 debug_on_quit = 0;
|
|
|
5300
|
|
|
5301 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5302 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5303 */ );
|
|
|
5304
|
|
|
5305 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5306 Function to call to invoke debugger.
|
|
|
5307 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5308 this function's value will be returned instead of that.
|
|
|
5309 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5310 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5311 If due to `eval' entry, one arg, t.
|
|
|
5312 */ );
|
|
|
5313 Vdebugger = Qnil;
|
|
|
5314
|
|
|
5315 preparing_for_armageddon = 0;
|
|
|
5316
|
|
|
5317 staticpro (&Vpending_warnings);
|
|
|
5318 Vpending_warnings = Qnil;
|
|
|
5319 Vpending_warnings_tail = Qnil; /* no need to protect this */
|
|
|
5320
|
|
|
5321 in_warnings = 0;
|
|
|
5322
|
|
|
5323 staticpro (&Vautoload_queue);
|
|
|
5324 Vautoload_queue = Qnil;
|
|
|
5325
|
|
|
5326 staticpro (&Vcondition_handlers);
|
|
|
5327
|
|
|
5328 staticpro (&Vcurrent_warning_class);
|
|
|
5329 Vcurrent_warning_class = Qnil;
|
|
|
5330
|
|
|
5331 staticpro (&Vcurrent_error_state);
|
|
|
5332 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5333
|
|
|
5334 Qunbound_suspended_errors_tag = make_opaque_long (0);
|
|
|
5335 staticpro (&Qunbound_suspended_errors_tag);
|
|
|
5336
|
|
|
5337 specpdl_size = 50;
|
|
|
5338 specpdl_depth_counter = 0;
|
|
|
5339 specpdl = (struct specbinding *)
|
|
|
5340 xmalloc (specpdl_size * sizeof (struct specbinding));
|
|
|
5341 /* XEmacs change: increase these values. */
|
|
|
5342 max_specpdl_size = 3000;
|
|
|
5343 max_lisp_eval_depth = 500;
|
|
|
5344 throw_level = 0;
|
|
|
5345
|
|
|
5346 reinit_eval ();
|
|
|
5347 }
|
