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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 #include "commands.h"
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32 #include "backtrace.h"
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33 #include "bytecode.h"
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34 #include "buffer.h"
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35 #include "console.h"
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36 #include "opaque.h"
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37
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38 struct backtrace *backtrace_list;
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39
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116
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40 /* Note you must always fill all of the fields in a backtrace structure
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41 before pushing them on the backtrace_list. The profiling code depends
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42 on this. */
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43
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44 #define PUSH_BACKTRACE(bt) \
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45 do { (bt).next = backtrace_list; backtrace_list = &(bt); } while (0)
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46
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47 #define POP_BACKTRACE(bt) \
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48 do { backtrace_list = (bt).next; } while (0)
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49
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0
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50 /* This is the list of current catches (and also condition-cases).
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51 This is a stack: the most recent catch is at the head of the
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52 list. Catches are created by declaring a 'struct catchtag'
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53 locally, filling the .TAG field in with the tag, and doing
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54 a setjmp() on .JMP. Fthrow() will store the value passed
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55 to it in .VAL and longjmp() back to .JMP, back to the function
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56 that established the catch. This will always be either
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57 internal_catch() (catches established internally or through
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58 `catch') or condition_case_1 (condition-cases established
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59 internally or through `condition-case').
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60
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61 The catchtag also records the current position in the
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62 call stack (stored in BACKTRACE_LIST), the current position
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63 in the specpdl stack (used for variable bindings and
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64 unwind-protects), the value of LISP_EVAL_DEPTH, and the
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65 current position in the GCPRO stack. All of these are
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66 restored by Fthrow().
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67 */
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185
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68
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0
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69 struct catchtag *catchlist;
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70
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71 Lisp_Object Qautoload, Qmacro, Qexit;
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72 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
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73 Lisp_Object Vquit_flag, Vinhibit_quit;
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74 Lisp_Object Qand_rest, Qand_optional;
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272
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75 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
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76 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
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77 Lisp_Object Qdebugger;
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78 Lisp_Object Qinhibit_quit;
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79 Lisp_Object Qrun_hooks;
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80 Lisp_Object Qsetq;
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81 Lisp_Object Qdisplay_warning;
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82 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
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83
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84 /* Records whether we want errors to occur. This will be a boolean,
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85 nil (errors OK) or t (no errors). If t, an error will cause a
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86 throw to Qunbound_suspended_errors_tag.
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87
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88 See call_with_suspended_errors(). */
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89 Lisp_Object Vcurrent_error_state;
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90
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91 /* Current warning class when warnings occur, or nil for no warnings.
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92 Only meaningful when Vcurrent_error_state is non-nil.
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93 See call_with_suspended_errors(). */
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94 Lisp_Object Vcurrent_warning_class;
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95
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96 /* Special catch tag used in call_with_suspended_errors(). */
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97 Lisp_Object Qunbound_suspended_errors_tag;
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98
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99 /* Non-nil means we're going down, so we better not run any hooks
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100 or do other non-essential stuff. */
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101 int preparing_for_armageddon;
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102
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103 /* Non-nil means record all fset's and provide's, to be undone
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104 if the file being autoloaded is not fully loaded.
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105 They are recorded by being consed onto the front of Vautoload_queue:
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106 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
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107
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108 Lisp_Object Vautoload_queue;
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109
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110 /* Current number of specbindings allocated in specpdl. */
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111 static int specpdl_size;
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112
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113 /* Pointer to beginning of specpdl. */
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114 struct specbinding *specpdl;
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115
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116 /* Pointer to first unused element in specpdl. */
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117 struct specbinding *specpdl_ptr;
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118
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2
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119 /* specpdl_ptr - specpdl. Callers outside this file should use
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120 * specpdl_depth () function-call */
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121 static int specpdl_depth_counter;
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122
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123 /* Maximum size allowed for specpdl allocation */
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124 int max_specpdl_size;
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125
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126 /* Depth in Lisp evaluations and function calls. */
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127 int lisp_eval_depth;
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128
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129 /* Maximum allowed depth in Lisp evaluations and function calls. */
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130 int max_lisp_eval_depth;
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131
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132 /* Nonzero means enter debugger before next function call */
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133 static int debug_on_next_call;
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134
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135 /* List of conditions (non-nil atom means all) which cause a backtrace
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136 if an error is handled by the command loop's error handler. */
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137 Lisp_Object Vstack_trace_on_error;
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138
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139 /* List of conditions (non-nil atom means all) which enter the debugger
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140 if an error is handled by the command loop's error handler. */
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141 Lisp_Object Vdebug_on_error;
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142
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163
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143 /* List of conditions and regexps specifying error messages which
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144 do not enter the debugger even if Vdebug_on_error says they should. */
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145 Lisp_Object Vdebug_ignored_errors;
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146
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0
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147 /* List of conditions (non-nil atom means all) which cause a backtrace
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148 if any error is signalled. */
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149 Lisp_Object Vstack_trace_on_signal;
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150
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151 /* List of conditions (non-nil atom means all) which enter the debugger
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152 if any error is signalled. */
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153 Lisp_Object Vdebug_on_signal;
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154
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155 /* Nonzero means enter debugger if a quit signal
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156 is handled by the command loop's error handler.
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157
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158 From lisp, this is a boolean variable and may have the values 0 and 1.
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159 But, eval.c temporarily uses the second bit of this variable to indicate
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160 that a critical_quit is in progress. The second bit is reset immediately
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161 after it is processed in signal_call_debugger(). */
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162 int debug_on_quit;
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163
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164 #if 0 /* FSFmacs */
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165 /* entering_debugger is basically equivalent */
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166 /* The value of num_nonmacro_input_chars as of the last time we
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167 started to enter the debugger. If we decide to enter the debugger
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168 again when this is still equal to num_nonmacro_input_chars, then we
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169 know that the debugger itself has an error, and we should just
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170 signal the error instead of entering an infinite loop of debugger
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171 invocations. */
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172 int when_entered_debugger;
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173 #endif
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174
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175 /* Nonzero means we are trying to enter the debugger.
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185
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176 This is to prevent recursive attempts.
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177 Cleared by the debugger calling Fbacktrace */
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178 static int entering_debugger;
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179
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180 /* Function to call to invoke the debugger */
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181 Lisp_Object Vdebugger;
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182
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183 /* Chain of condition handlers currently in effect.
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184 The elements of this chain are contained in the stack frames
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185 of Fcondition_case and internal_condition_case.
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186 When an error is signaled (by calling Fsignal, below),
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187 this chain is searched for an element that applies.
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188
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189 Each element of this list is one of the following:
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190
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191 A list of a handler function and possibly args to pass to
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192 the function. This is a handler established with
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193 `call-with-condition-handler' (q.v.).
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194
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195 A list whose car is Qunbound and whose cdr is Qt.
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196 This is a special condition-case handler established
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197 by C code with condition_case_1(). All errors are
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198 trapped; the debugger is not invoked even if
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199 `debug-on-error' was set.
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200
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201 A list whose car is Qunbound and whose cdr is Qerror.
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202 This is a special condition-case handler established
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203 by C code with condition_case_1(). It is like Qt
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204 except that the debugger is invoked normally if it is
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205 called for.
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206
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207 A list whose car is Qunbound and whose cdr is a list
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208 of lists (CONDITION-NAME BODY ...) exactly as in
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209 `condition-case'. This is a normal `condition-case'
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210 handler.
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211
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212 Note that in all cases *except* the first, there is a
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213 corresponding catch, whose TAG is the value of
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214 Vcondition_handlers just after the handler data just
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215 described is pushed onto it. The reason is that
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216 `condition-case' handlers need to throw back to the
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217 place where the handler was installed before invoking
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218 it, while `call-with-condition-handler' handlers are
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219 invoked in the environment that `signal' was invoked
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220 in.
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221 */
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222 static Lisp_Object Vcondition_handlers;
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223
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224 /* Used for error catching purposes by throw_or_bomb_out */
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225 static int throw_level;
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226
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74
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227 static Lisp_Object primitive_funcall (lisp_fn_t fn, int nargs,
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228 Lisp_Object args[]);
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229
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230
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231 /**********************************************************************/
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232 /* The subr and compiled-function types */
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233 /**********************************************************************/
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234
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235 static void
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236 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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237 {
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238 struct Lisp_Subr *subr = XSUBR (obj);
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239
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240 if (print_readably)
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241 error ("printing unreadable object #<subr %s>",
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242 subr_name (subr));
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243
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244 write_c_string (((subr->max_args == UNEVALLED)
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245 ? "#<special-form "
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246 : "#<subr "),
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247 printcharfun);
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185
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248
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249 write_c_string (subr_name (subr), printcharfun);
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250 write_c_string (((subr->prompt) ? " (interactive)>" : ">"),
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251 printcharfun);
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252 }
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253
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272
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254 DEFINE_LRECORD_IMPLEMENTATION ("subr", subr,
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255 this_one_is_unmarkable, print_subr, 0, 0, 0,
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256 struct Lisp_Subr);
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0
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257
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258 static Lisp_Object
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259 mark_compiled_function (Lisp_Object obj, void (*markobj) (Lisp_Object))
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260 {
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261 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (obj);
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262
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263 ((markobj) (b->bytecodes));
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264 ((markobj) (b->arglist));
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265 ((markobj) (b->doc_and_interactive));
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266 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
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267 ((markobj) (b->annotated));
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268 #endif
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269 /* tail-recurse on constants */
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173
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270 return b->constants;
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271 }
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272
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273 static int
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274 compiled_function_equal (Lisp_Object o1, Lisp_Object o2, int depth)
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275 {
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276 struct Lisp_Compiled_Function *b1 = XCOMPILED_FUNCTION (o1);
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277 struct Lisp_Compiled_Function *b2 = XCOMPILED_FUNCTION (o2);
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272
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278 return
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279 (b1->flags.documentationp == b2->flags.documentationp &&
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280 b1->flags.interactivep == b2->flags.interactivep &&
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281 b1->flags.domainp == b2->flags.domainp && /* I18N3 */
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282 internal_equal (b1->bytecodes, b2->bytecodes, depth + 1) &&
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283 internal_equal (b1->constants, b2->constants, depth + 1) &&
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284 internal_equal (b1->arglist, b2->arglist, depth + 1) &&
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285 internal_equal (b1->doc_and_interactive,
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286 b2->doc_and_interactive, depth + 1));
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0
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287 }
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288
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289 static unsigned long
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290 compiled_function_hash (Lisp_Object obj, int depth)
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291 {
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292 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (obj);
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293 return HASH3 ((b->flags.documentationp << 2) +
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294 (b->flags.interactivep << 1) +
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295 b->flags.domainp,
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296 internal_hash (b->bytecodes, depth + 1),
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297 internal_hash (b->constants, depth + 1));
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298 }
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299
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272
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300 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("compiled-function", compiled_function,
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301 mark_compiled_function,
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302 print_compiled_function, 0,
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303 compiled_function_equal,
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304 compiled_function_hash,
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305 struct Lisp_Compiled_Function);
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0
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306
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307 /**********************************************************************/
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308 /* Entering the debugger */
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309 /**********************************************************************/
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310
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311 /* unwind-protect used by call_debugger() to restore the value of
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312 enterring_debugger. (We cannot use specbind() because the
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313 variable is not Lisp-accessible.) */
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314
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315 static Lisp_Object
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316 restore_entering_debugger (Lisp_Object arg)
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317 {
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179
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318 entering_debugger = ! NILP (arg);
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0
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319 return arg;
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320 }
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321
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322 /* Actually call the debugger. ARG is a list of args that will be
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323 passed to the debugger function, as follows;
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324
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325 If due to frame exit, args are `exit' and the value being returned;
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326 this function's value will be returned instead of that.
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327 If due to error, args are `error' and a list of the args to `signal'.
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328 If due to `apply' or `funcall' entry, one arg, `lambda'.
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329 If due to `eval' entry, one arg, t.
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330
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331 */
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332
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333 static Lisp_Object
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334 call_debugger_259 (Lisp_Object arg)
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335 {
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336 return apply1 (Vdebugger, arg);
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337 }
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338
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339 /* Call the debugger, doing some encapsulation. We make sure we have
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340 some room on the eval and specpdl stacks, and bind enterring_debugger
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341 to 1 during this call. This is used to trap errors that may occur
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342 when enterring the debugger (e.g. the value of `debugger' is invalid),
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343 so that the debugger will not be recursively entered if debug-on-error
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344 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
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345 enter the debugger.) enterring_debugger gets reset to 0 as soon
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346 as a backtrace is displayed, so that further errors can indeed be
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347 handled normally.
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348
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349 We also establish a catch for 'debugger. If the debugger function
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350 throws to this instead of returning a value, it means that the user
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351 pressed 'c' (pretend like the debugger was never entered). The
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352 function then returns Qunbound. (If the user pressed 'r', for
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353 return a value, then the debugger function returns normally with
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354 this value.)
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355
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356 The difference between 'c' and 'r' is as follows:
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357
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358 debug-on-call:
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359 No difference. The call proceeds as normal.
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360 debug-on-exit:
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361 With 'r', the specified value is returned as the function's
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362 return value. With 'c', the value that would normally be
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363 returned is returned.
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364 signal:
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365 With 'r', the specified value is returned as the return
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366 value of `signal'. (This is the only time that `signal'
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367 can return, instead of making a non-local exit.) With `c',
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368 `signal' will continue looking for handlers as if the
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369 debugger was never entered, and will probably end up
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370 throwing to a handler or to top-level.
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371 */
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372
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373 static Lisp_Object
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374 call_debugger (Lisp_Object arg)
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375 {
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376 int threw;
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377 Lisp_Object val;
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378 int speccount;
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379
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380 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
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381 max_lisp_eval_depth = lisp_eval_depth + 20;
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382 if (specpdl_size + 40 > max_specpdl_size)
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383 max_specpdl_size = specpdl_size + 40;
|
|
|
384 debug_on_next_call = 0;
|
|
|
385
|
|
|
386 speccount = specpdl_depth_counter;
|
|
185
|
387 record_unwind_protect (restore_entering_debugger,
|
|
0
|
388 (entering_debugger ? Qt : Qnil));
|
|
|
389 entering_debugger = 1;
|
|
|
390 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
391
|
|
185
|
392 return unbind_to (speccount, ((threw)
|
|
179
|
393 ? Qunbound /* Not returning a value */
|
|
|
394 : val));
|
|
0
|
395 }
|
|
|
396
|
|
|
397 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
398 with the appropriate args for this. VAL is the exit value that is
|
|
|
399 about to be returned. */
|
|
|
400
|
|
|
401 static Lisp_Object
|
|
|
402 do_debug_on_exit (Lisp_Object val)
|
|
|
403 {
|
|
|
404 /* This is falsified by call_debugger */
|
|
|
405 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
94
|
406
|
|
173
|
407 return !UNBOUNDP (v) ? v : val;
|
|
0
|
408 }
|
|
|
409
|
|
|
410 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
411 with the appropriate args for this. VAL is either t for a call
|
|
|
412 through `eval' or 'lambda for a call through `funcall'.
|
|
|
413
|
|
|
414 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
415 FUNCALL can be defined as
|
|
|
416
|
|
|
417 (defmacro func (fun &rest args)
|
|
|
418 (cons (eval fun) args))
|
|
|
419
|
|
|
420 and should be treated as such.
|
|
|
421 */
|
|
|
422
|
|
|
423 static void
|
|
|
424 do_debug_on_call (Lisp_Object code)
|
|
|
425 {
|
|
|
426 debug_on_next_call = 0;
|
|
|
427 backtrace_list->debug_on_exit = 1;
|
|
|
428 call_debugger (list1 (code));
|
|
|
429 }
|
|
|
430
|
|
|
431 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
432 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
433 and CONDITIONS is the list of error conditions associated with
|
|
|
434 the error being signalled. This returns non-nil if LIST
|
|
|
435 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
436 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
437 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
438 same as one of the symbols in CONDITIONS.) */
|
|
|
439
|
|
|
440 static int
|
|
|
441 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
442 {
|
|
|
443 if (NILP (list))
|
|
|
444 return 0;
|
|
|
445 if (! CONSP (list))
|
|
|
446 return 1;
|
|
|
447
|
|
|
448 while (CONSP (conditions))
|
|
|
449 {
|
|
|
450 Lisp_Object this, tail;
|
|
|
451 this = XCAR (conditions);
|
|
|
452 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
453 if (EQ (XCAR (tail), this))
|
|
|
454 return 1;
|
|
|
455 conditions = XCDR (conditions);
|
|
|
456 }
|
|
|
457 return 0;
|
|
|
458 }
|
|
|
459
|
|
163
|
460
|
|
|
461 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
462 and described by SIGNAL-DATA, should skip the debugger
|
|
|
463 according to debugger-ignore-errors. */
|
|
|
464
|
|
|
465 static int
|
|
|
466 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
467 {
|
|
167
|
468 /* This function can GC */
|
|
163
|
469 Lisp_Object tail;
|
|
|
470 int first_string = 1;
|
|
173
|
471 Lisp_Object error_message = Qnil;
|
|
163
|
472
|
|
|
473 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
474 {
|
|
|
475 if (STRINGP (XCAR (tail)))
|
|
|
476 {
|
|
|
477 if (first_string)
|
|
|
478 {
|
|
165
|
479 error_message = Ferror_message_string (data);
|
|
163
|
480 first_string = 0;
|
|
|
481 }
|
|
167
|
482 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
163
|
483 return 1;
|
|
|
484 }
|
|
|
485 else
|
|
|
486 {
|
|
|
487 Lisp_Object contail;
|
|
|
488
|
|
|
489 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
167
|
490 if (EQ (XCAR (tail), XCAR (contail)))
|
|
163
|
491 return 1;
|
|
|
492 }
|
|
|
493 }
|
|
|
494
|
|
|
495 return 0;
|
|
|
496 }
|
|
|
497
|
|
0
|
498 /* Actually generate a backtrace on STREAM. */
|
|
|
499
|
|
|
500 static Lisp_Object
|
|
|
501 backtrace_259 (Lisp_Object stream)
|
|
|
502 {
|
|
173
|
503 return Fbacktrace (stream, Qt);
|
|
0
|
504 }
|
|
|
505
|
|
272
|
506 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
0
|
507 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
508 associated with the error being signalled. SIG is the actual error
|
|
|
509 being signalled, and DATA is the associated data (these are exactly
|
|
|
510 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
511 list of error handlers that are to be put in place while the debugger
|
|
|
512 is called. This is generally the remaining handlers that are
|
|
|
513 outside of the innermost handler trapping this error. This way,
|
|
|
514 if the same error occurs inside of the debugger, you usually don't get
|
|
|
515 the debugger entered recursively.
|
|
|
516
|
|
|
517 This function returns Qunbound if it didn't call the debugger or if
|
|
|
518 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
519 debugger was never entered. Otherwise, it returns the value
|
|
|
520 that the user specified with `r'. (Note that much of the time,
|
|
|
521 the user will abort with C-], and we will never have a chance to
|
|
|
522 return anything at all.)
|
|
|
523
|
|
|
524 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
525 and stack-trace-on-signal to control whether we do anything.
|
|
|
526 This is so that debug-on-error doesn't make handled errors
|
|
|
527 cause the debugger to get invoked.
|
|
|
528
|
|
|
529 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
530 those functions aren't done more than once in a single `signal'
|
|
|
531 session. */
|
|
|
532
|
|
|
533 static Lisp_Object
|
|
|
534 signal_call_debugger (Lisp_Object conditions,
|
|
|
535 Lisp_Object sig, Lisp_Object data,
|
|
|
536 Lisp_Object active_handlers,
|
|
|
537 int signal_vars_only,
|
|
|
538 int *stack_trace_displayed,
|
|
|
539 int *debugger_entered)
|
|
|
540 {
|
|
|
541 /* This function can GC */
|
|
|
542 Lisp_Object val = Qunbound;
|
|
|
543 Lisp_Object all_handlers = Vcondition_handlers;
|
|
167
|
544 Lisp_Object temp_data = Qnil;
|
|
0
|
545 int speccount = specpdl_depth_counter;
|
|
167
|
546 struct gcpro gcpro1, gcpro2;
|
|
|
547 GCPRO2 (all_handlers, temp_data);
|
|
0
|
548
|
|
|
549 Vcondition_handlers = active_handlers;
|
|
|
550
|
|
167
|
551 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
163
|
552
|
|
|
553 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
167
|
554 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
555 && !skip_debugger (conditions, temp_data))
|
|
0
|
556 {
|
|
|
557 specbind (Qdebug_on_error, Qnil);
|
|
|
558 specbind (Qstack_trace_on_error, Qnil);
|
|
|
559 specbind (Qdebug_on_signal, Qnil);
|
|
|
560 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
561
|
|
0
|
562 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
563 backtrace_259,
|
|
|
564 Qnil,
|
|
|
565 Qnil);
|
|
|
566 unbind_to (speccount, Qnil);
|
|
|
567 *stack_trace_displayed = 1;
|
|
|
568 }
|
|
185
|
569
|
|
0
|
570 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
571 && (EQ (sig, Qquit)
|
|
|
572 ? debug_on_quit
|
|
167
|
573 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
574 && !skip_debugger (conditions, temp_data))
|
|
0
|
575 {
|
|
|
576 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
577 specbind (Qdebug_on_error, Qnil);
|
|
|
578 specbind (Qstack_trace_on_error, Qnil);
|
|
|
579 specbind (Qdebug_on_signal, Qnil);
|
|
|
580 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
581
|
|
0
|
582 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
583 *debugger_entered = 1;
|
|
|
584 }
|
|
|
585
|
|
|
586 if (!entering_debugger && !*stack_trace_displayed
|
|
|
587 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
588 {
|
|
|
589 specbind (Qdebug_on_error, Qnil);
|
|
|
590 specbind (Qstack_trace_on_error, Qnil);
|
|
|
591 specbind (Qdebug_on_signal, Qnil);
|
|
|
592 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
593
|
|
0
|
594 internal_with_output_to_temp_buffer ("*Backtrace*",
|
|
|
595 backtrace_259,
|
|
|
596 Qnil,
|
|
|
597 Qnil);
|
|
|
598 unbind_to (speccount, Qnil);
|
|
|
599 *stack_trace_displayed = 1;
|
|
|
600 }
|
|
|
601
|
|
|
602 if (!entering_debugger && !*debugger_entered
|
|
|
603 && (EQ (sig, Qquit)
|
|
|
604 ? debug_on_quit
|
|
|
605 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
606 {
|
|
|
607 debug_on_quit &= ~2; /* reset critical bit */
|
|
|
608 specbind (Qdebug_on_error, Qnil);
|
|
|
609 specbind (Qstack_trace_on_error, Qnil);
|
|
|
610 specbind (Qdebug_on_signal, Qnil);
|
|
|
611 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
612
|
|
0
|
613 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
614 *debugger_entered = 1;
|
|
|
615 }
|
|
|
616
|
|
|
617 UNGCPRO;
|
|
|
618 Vcondition_handlers = all_handlers;
|
|
173
|
619 return unbind_to (speccount, val);
|
|
0
|
620 }
|
|
|
621
|
|
|
622
|
|
|
623 /**********************************************************************/
|
|
|
624 /* The basic special forms */
|
|
|
625 /**********************************************************************/
|
|
|
626
|
|
|
627 /* NOTE!!! Every function that can call EVAL must protect its args
|
|
|
628 and temporaries from garbage collection while it needs them.
|
|
|
629 The definition of `For' shows what you have to do. */
|
|
|
630
|
|
20
|
631 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
632 Eval args until one of them yields non-nil, then return that value.
|
|
|
633 The remaining args are not evalled at all.
|
|
|
634 If all args return nil, return nil.
|
|
20
|
635 */
|
|
|
636 (args))
|
|
0
|
637 {
|
|
|
638 /* This function can GC */
|
|
272
|
639 REGISTER Lisp_Object tail;
|
|
0
|
640 struct gcpro gcpro1;
|
|
|
641
|
|
243
|
642 GCPRO1 (args);
|
|
|
643
|
|
272
|
644 LIST_LOOP (tail, args)
|
|
0
|
645 {
|
|
272
|
646 Lisp_Object val = Feval (XCAR (tail));
|
|
0
|
647 if (!NILP (val))
|
|
272
|
648 {
|
|
|
649 UNGCPRO;
|
|
|
650 return val;
|
|
|
651 }
|
|
0
|
652 }
|
|
|
653
|
|
|
654 UNGCPRO;
|
|
272
|
655 return Qnil;
|
|
0
|
656 }
|
|
|
657
|
|
20
|
658 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
659 Eval args until one of them yields nil, then return nil.
|
|
|
660 The remaining args are not evalled at all.
|
|
|
661 If no arg yields nil, return the last arg's value.
|
|
20
|
662 */
|
|
|
663 (args))
|
|
0
|
664 {
|
|
|
665 /* This function can GC */
|
|
272
|
666 REGISTER Lisp_Object tail, val = Qt;
|
|
0
|
667 struct gcpro gcpro1;
|
|
|
668
|
|
243
|
669 GCPRO1 (args);
|
|
|
670
|
|
272
|
671 LIST_LOOP (tail, args)
|
|
0
|
672 {
|
|
272
|
673 val = Feval (XCAR (tail));
|
|
0
|
674 if (NILP (val))
|
|
|
675 break;
|
|
|
676 }
|
|
|
677
|
|
|
678 UNGCPRO;
|
|
|
679 return val;
|
|
|
680 }
|
|
|
681
|
|
20
|
682 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
272
|
683 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
0
|
684 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
685 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
686 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
687 */
|
|
272
|
688 (args))
|
|
0
|
689 {
|
|
|
690 /* This function can GC */
|
|
272
|
691 Lisp_Object val;
|
|
0
|
692 struct gcpro gcpro1;
|
|
|
693
|
|
|
694 GCPRO1 (args);
|
|
272
|
695
|
|
|
696 if (!NILP (Feval (XCAR (args))))
|
|
|
697 val = Feval (XCAR (XCDR ((args))));
|
|
|
698 else
|
|
|
699 val = Fprogn (XCDR (XCDR (args)));
|
|
|
700
|
|
0
|
701 UNGCPRO;
|
|
272
|
702 return val;
|
|
0
|
703 }
|
|
|
704
|
|
20
|
705 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
706 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
707 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
708 and, if the value is non-nil, this clause succeeds:
|
|
|
709 then the expressions in BODY are evaluated and the last one's
|
|
|
710 value is the value of the cond-form.
|
|
|
711 If no clause succeeds, cond returns nil.
|
|
|
712 If a clause has one element, as in (CONDITION),
|
|
|
713 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
714 */
|
|
|
715 (args))
|
|
0
|
716 {
|
|
|
717 /* This function can GC */
|
|
272
|
718 REGISTER Lisp_Object tail;
|
|
0
|
719 struct gcpro gcpro1;
|
|
|
720
|
|
|
721 GCPRO1 (args);
|
|
272
|
722
|
|
|
723 LIST_LOOP (tail, args)
|
|
0
|
724 {
|
|
272
|
725 Lisp_Object val;
|
|
|
726 Lisp_Object clause = XCAR (tail);
|
|
|
727 CHECK_CONS (clause);
|
|
243
|
728 val = Feval (XCAR (clause));
|
|
0
|
729 if (!NILP (val))
|
|
|
730 {
|
|
272
|
731 Lisp_Object clause_tail = XCDR (clause);
|
|
|
732 if (!NILP (clause_tail))
|
|
|
733 {
|
|
|
734 CHECK_TRUE_LIST (clause_tail);
|
|
|
735 val = Fprogn (clause_tail);
|
|
|
736 }
|
|
|
737 UNGCPRO;
|
|
|
738 return val;
|
|
0
|
739 }
|
|
|
740 }
|
|
|
741 UNGCPRO;
|
|
|
742
|
|
272
|
743 return Qnil;
|
|
0
|
744 }
|
|
|
745
|
|
20
|
746 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
272
|
747 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
748 */
|
|
|
749 (args))
|
|
0
|
750 {
|
|
|
751 /* This function can GC */
|
|
272
|
752 REGISTER Lisp_Object tail, val = Qnil;
|
|
0
|
753 struct gcpro gcpro1;
|
|
|
754
|
|
243
|
755 GCPRO1 (args);
|
|
|
756
|
|
272
|
757 LIST_LOOP (tail, args)
|
|
|
758 val = Feval (XCAR (tail));
|
|
0
|
759
|
|
|
760 UNGCPRO;
|
|
|
761 return val;
|
|
|
762 }
|
|
|
763
|
|
20
|
764 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
272
|
765 \(prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.
|
|
0
|
766 The value of FIRST is saved during the evaluation of the remaining args,
|
|
|
767 whose values are discarded.
|
|
20
|
768 */
|
|
|
769 (args))
|
|
0
|
770 {
|
|
|
771 /* This function can GC */
|
|
272
|
772 REGISTER Lisp_Object tail = args;
|
|
245
|
773 Lisp_Object val = Qnil;
|
|
0
|
774 struct gcpro gcpro1, gcpro2;
|
|
243
|
775
|
|
0
|
776 GCPRO2 (args, val);
|
|
|
777
|
|
272
|
778 val = Feval (XCAR (tail));
|
|
|
779
|
|
|
780 LIST_LOOP (tail, XCDR (tail))
|
|
|
781 Feval (XCAR (tail));
|
|
0
|
782
|
|
|
783 UNGCPRO;
|
|
|
784 return val;
|
|
|
785 }
|
|
|
786
|
|
20
|
787 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
272
|
788 \(prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.
|
|
0
|
789 The value of Y is saved during the evaluation of the remaining args,
|
|
|
790 whose values are discarded.
|
|
20
|
791 */
|
|
|
792 (args))
|
|
0
|
793 {
|
|
|
794 /* This function can GC */
|
|
272
|
795 REGISTER Lisp_Object tail = args;
|
|
245
|
796 Lisp_Object val = Qnil;
|
|
0
|
797 struct gcpro gcpro1, gcpro2;
|
|
243
|
798
|
|
0
|
799 GCPRO2 (args, val);
|
|
|
800
|
|
272
|
801 Feval (XCAR (tail));
|
|
|
802 tail = XCDR (tail);
|
|
|
803 val = Feval (XCAR (tail));
|
|
|
804
|
|
|
805 LIST_LOOP (tail, XCDR (tail))
|
|
|
806 Feval (XCAR (tail));
|
|
0
|
807
|
|
|
808 UNGCPRO;
|
|
|
809 return val;
|
|
|
810 }
|
|
|
811
|
|
20
|
812 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
272
|
813 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
814 The value of the last form in BODY is returned.
|
|
|
815 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
816 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
817 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
818 */
|
|
|
819 (args))
|
|
0
|
820 {
|
|
|
821 /* This function can GC */
|
|
272
|
822 Lisp_Object varlist = XCAR (args);
|
|
|
823 Lisp_Object tail;
|
|
0
|
824 int speccount = specpdl_depth_counter;
|
|
272
|
825 struct gcpro gcpro1;
|
|
|
826
|
|
|
827 GCPRO1 (args);
|
|
|
828
|
|
|
829 EXTERNAL_LIST_LOOP (tail, varlist)
|
|
0
|
830 {
|
|
272
|
831 Lisp_Object elt = XCAR (tail);
|
|
0
|
832 QUIT;
|
|
|
833 if (SYMBOLP (elt))
|
|
|
834 specbind (elt, Qnil);
|
|
|
835 else
|
|
|
836 {
|
|
272
|
837 Lisp_Object sym, form;
|
|
|
838 CHECK_CONS (elt);
|
|
|
839 sym = XCAR (elt);
|
|
|
840 elt = XCDR (elt);
|
|
|
841 if (NILP (elt))
|
|
|
842 form = Qnil;
|
|
|
843 else
|
|
|
844 {
|
|
|
845 CHECK_CONS (elt);
|
|
|
846 form = XCAR (elt);
|
|
|
847 elt = XCDR (elt);
|
|
|
848 if (!NILP (elt))
|
|
|
849 signal_simple_error
|
|
|
850 ("`let' bindings can have only one value-form",
|
|
|
851 XCAR (tail));
|
|
|
852 }
|
|
|
853 specbind (sym, Feval (form));
|
|
0
|
854 }
|
|
|
855 }
|
|
|
856 UNGCPRO;
|
|
272
|
857 return unbind_to (speccount, Fprogn (XCDR (args)));
|
|
0
|
858 }
|
|
|
859
|
|
20
|
860 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
272
|
861 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
862 The value of the last form in BODY is returned.
|
|
|
863 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
864 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
865 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
866 */
|
|
|
867 (args))
|
|
0
|
868 {
|
|
|
869 /* This function can GC */
|
|
272
|
870 Lisp_Object varlist = XCAR (args);
|
|
|
871 REGISTER Lisp_Object tail;
|
|
|
872 Lisp_Object *temps;
|
|
0
|
873 int speccount = specpdl_depth_counter;
|
|
272
|
874 REGISTER int argnum = 0;
|
|
0
|
875 struct gcpro gcpro1, gcpro2;
|
|
|
876
|
|
272
|
877 /* Make space to hold the values to give the bound variables. */
|
|
|
878 {
|
|
|
879 int varcount = 0;
|
|
|
880 EXTERNAL_LIST_LOOP (tail, varlist)
|
|
|
881 varcount++;
|
|
|
882 temps = alloca_array (Lisp_Object, varcount);
|
|
|
883 }
|
|
0
|
884
|
|
|
885 /* Compute the values and store them in `temps' */
|
|
|
886
|
|
|
887 GCPRO2 (args, *temps);
|
|
|
888 gcpro2.nvars = 0;
|
|
|
889
|
|
272
|
890 LIST_LOOP (tail, varlist)
|
|
0
|
891 {
|
|
272
|
892 Lisp_Object elt = XCAR (tail);
|
|
0
|
893 QUIT;
|
|
|
894 if (SYMBOLP (elt))
|
|
272
|
895 temps[argnum++] = Qnil;
|
|
0
|
896 else
|
|
272
|
897 {
|
|
|
898 CHECK_CONS (elt);
|
|
|
899 elt = XCDR (elt);
|
|
|
900 if (NILP (elt))
|
|
|
901 temps[argnum++] = Qnil;
|
|
|
902 else
|
|
|
903 {
|
|
|
904 CHECK_CONS (elt);
|
|
|
905 temps[argnum++] = Feval (XCAR (elt));
|
|
|
906 gcpro2.nvars = argnum;
|
|
|
907
|
|
|
908 if (!NILP (XCDR (elt)))
|
|
|
909 signal_simple_error
|
|
|
910 ("`let' bindings can have only one value-form",
|
|
|
911 XCAR (tail));
|
|
|
912 }
|
|
|
913 }
|
|
0
|
914 }
|
|
|
915 UNGCPRO;
|
|
|
916
|
|
272
|
917 argnum = 0;
|
|
|
918 LIST_LOOP (tail, varlist)
|
|
0
|
919 {
|
|
272
|
920 Lisp_Object elt = XCAR (tail);
|
|
|
921 specbind (SYMBOLP (elt) ? elt : XCAR (elt), temps[argnum++]);
|
|
0
|
922 }
|
|
|
923
|
|
272
|
924 return unbind_to (speccount, Fprogn (XCDR (args)));
|
|
0
|
925 }
|
|
|
926
|
|
20
|
927 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
272
|
928 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
0
|
929 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
930 until TEST returns nil.
|
|
20
|
931 */
|
|
243
|
932 (args))
|
|
0
|
933 {
|
|
|
934 /* This function can GC */
|
|
272
|
935 Lisp_Object tem;
|
|
|
936 Lisp_Object test = XCAR (args);
|
|
|
937 Lisp_Object body = XCDR (args);
|
|
0
|
938 struct gcpro gcpro1, gcpro2;
|
|
|
939
|
|
|
940 GCPRO2 (test, body);
|
|
|
941
|
|
|
942 while (tem = Feval (test), !NILP (tem))
|
|
|
943 {
|
|
|
944 QUIT;
|
|
|
945 Fprogn (body);
|
|
|
946 }
|
|
|
947
|
|
|
948 UNGCPRO;
|
|
|
949 return Qnil;
|
|
|
950 }
|
|
|
951
|
|
20
|
952 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
272
|
953 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
0
|
954 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
955 The values VAL are expressions; they are evaluated.
|
|
|
956 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
957 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
958 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
959 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
960 */
|
|
|
961 (args))
|
|
0
|
962 {
|
|
|
963 /* This function can GC */
|
|
|
964 struct gcpro gcpro1;
|
|
272
|
965 Lisp_Object val = Qnil;
|
|
|
966
|
|
|
967 GCPRO1 (args);
|
|
0
|
968
|
|
195
|
969 {
|
|
272
|
970 REGISTER int i = 0;
|
|
|
971 Lisp_Object args2;
|
|
|
972 for (args2 = args; !NILP (args2); args2 = XCDR (args2))
|
|
195
|
973 {
|
|
|
974 i++;
|
|
|
975 /*
|
|
|
976 * uncomment the QUIT if there is some way a circular
|
|
|
977 * arglist can get in here. I think Feval or Fapply would
|
|
243
|
978 * spin first and the list would never get here.
|
|
195
|
979 */
|
|
|
980 /* QUIT; */
|
|
|
981 }
|
|
|
982 if (i & 1) /* Odd number of arguments? */
|
|
|
983 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int(i)));
|
|
|
984 }
|
|
0
|
985
|
|
272
|
986 while (!NILP (args))
|
|
0
|
987 {
|
|
272
|
988 Lisp_Object sym = XCAR (args);
|
|
|
989 val = Feval (XCAR (XCDR (args)));
|
|
0
|
990 Fset (sym, val);
|
|
272
|
991 args = XCDR (XCDR (args));
|
|
0
|
992 }
|
|
|
993
|
|
|
994 UNGCPRO;
|
|
|
995 return val;
|
|
|
996 }
|
|
185
|
997
|
|
20
|
998 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
999 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
1000 */
|
|
|
1001 (args))
|
|
0
|
1002 {
|
|
272
|
1003 return XCAR (args);
|
|
0
|
1004 }
|
|
185
|
1005
|
|
20
|
1006 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
1007 Like `quote', but preferred for objects which are functions.
|
|
|
1008 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1009 `quote' cannot do that.
|
|
20
|
1010 */
|
|
|
1011 (args))
|
|
0
|
1012 {
|
|
272
|
1013 return XCAR (args);
|
|
0
|
1014 }
|
|
|
1015
|
|
|
1016
|
|
|
1017 /**********************************************************************/
|
|
|
1018 /* Defining functions/variables */
|
|
|
1019 /**********************************************************************/
|
|
|
1020
|
|
20
|
1021 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
272
|
1022 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
0
|
1023 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1024 See also the function `interactive'.
|
|
20
|
1025 */
|
|
|
1026 (args))
|
|
0
|
1027 {
|
|
|
1028 /* This function can GC */
|
|
272
|
1029 Lisp_Object fn_name = XCAR (args);
|
|
|
1030 Lisp_Object defn = Fcons (Qlambda, XCDR (args));
|
|
|
1031
|
|
0
|
1032 if (purify_flag)
|
|
|
1033 defn = Fpurecopy (defn);
|
|
|
1034 Ffset (fn_name, defn);
|
|
|
1035 LOADHIST_ATTACH (fn_name);
|
|
|
1036 return fn_name;
|
|
|
1037 }
|
|
|
1038
|
|
20
|
1039 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
272
|
1040 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
0
|
1041 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1042 When the macro is called, as in (NAME ARGS...),
|
|
|
1043 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1044 the list ARGS... as it appears in the expression,
|
|
|
1045 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1046 */
|
|
|
1047 (args))
|
|
0
|
1048 {
|
|
|
1049 /* This function can GC */
|
|
272
|
1050 Lisp_Object fn_name = XCAR (args);
|
|
|
1051 Lisp_Object defn = Fcons (Qmacro, Fcons (Qlambda, XCDR (args)));
|
|
|
1052
|
|
0
|
1053 if (purify_flag)
|
|
|
1054 defn = Fpurecopy (defn);
|
|
|
1055 Ffset (fn_name, defn);
|
|
|
1056 LOADHIST_ATTACH (fn_name);
|
|
|
1057 return fn_name;
|
|
|
1058 }
|
|
|
1059
|
|
20
|
1060 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
272
|
1061 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
0
|
1062 You are not required to define a variable in order to use it,
|
|
|
1063 but the definition can supply documentation and an initial value
|
|
|
1064 in a way that tags can recognize.
|
|
|
1065
|
|
|
1066 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1067 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1068 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1069 void.)
|
|
|
1070 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1071 buffer-local values are not affected.
|
|
|
1072 INITVALUE and DOCSTRING are optional.
|
|
|
1073 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1074 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1075 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1076
|
|
|
1077 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1078 */
|
|
|
1079 (args))
|
|
0
|
1080 {
|
|
|
1081 /* This function can GC */
|
|
272
|
1082 Lisp_Object sym = XCAR (args);
|
|
|
1083
|
|
|
1084 if (!NILP (args = XCDR (args)))
|
|
0
|
1085 {
|
|
272
|
1086 Lisp_Object val = XCAR (args);
|
|
|
1087
|
|
|
1088 if (NILP (Fdefault_boundp (sym)))
|
|
|
1089 Fset_default (sym, Feval (val));
|
|
|
1090
|
|
|
1091 if (!NILP (args = XCDR (args)))
|
|
|
1092 {
|
|
|
1093 Lisp_Object doc = XCAR (args);
|
|
|
1094 #if 0 /* FSFmacs */
|
|
|
1095 /* #### We should probably do this but it might be dangerous */
|
|
|
1096 if (purify_flag)
|
|
|
1097 doc = Fpurecopy (doc);
|
|
|
1098 Fput (sym, Qvariable_documentation, doc);
|
|
|
1099 #else
|
|
|
1100 pure_put (sym, Qvariable_documentation, doc);
|
|
|
1101 #endif
|
|
|
1102 if (!NILP (args = XCDR (args)))
|
|
|
1103 error ("too many arguments");
|
|
|
1104 }
|
|
0
|
1105 }
|
|
|
1106
|
|
|
1107 #ifdef I18N3
|
|
|
1108 if (!NILP (Vfile_domain))
|
|
|
1109 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1110 #endif
|
|
|
1111
|
|
|
1112 LOADHIST_ATTACH (sym);
|
|
|
1113 return sym;
|
|
|
1114 }
|
|
|
1115
|
|
20
|
1116 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
272
|
1117 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
0
|
1118 variable.
|
|
|
1119 The intent is that programs do not change this value, but users may.
|
|
|
1120 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1121 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1122 buffer-local values are not affected.
|
|
|
1123 DOCSTRING is optional.
|
|
|
1124 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
|
1125 This means that M-x set-variable and M-x edit-options recognize it.
|
|
|
1126
|
|
|
1127 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1128 normally loaded, since it is useful for users to be able to specify
|
|
|
1129 their own values for such variables before loading the library.
|
|
|
1130 Since `defconst' unconditionally assigns the variable,
|
|
|
1131 it would override the user's choice.
|
|
20
|
1132 */
|
|
|
1133 (args))
|
|
0
|
1134 {
|
|
|
1135 /* This function can GC */
|
|
272
|
1136 Lisp_Object sym = XCAR (args);
|
|
|
1137 Lisp_Object val = XCAR (args = XCDR (args));
|
|
|
1138
|
|
|
1139 Fset_default (sym, Feval (val));
|
|
|
1140
|
|
|
1141 if (!NILP (args = XCDR (args)))
|
|
|
1142 {
|
|
|
1143 Lisp_Object doc = XCAR (args);
|
|
|
1144 #if 0 /* FSFmacs */
|
|
|
1145 /* #### We should probably do this but it might be dangerous */
|
|
|
1146 if (purify_flag)
|
|
|
1147 doc = Fpurecopy (doc);
|
|
|
1148 Fput (sym, Qvariable_documentation, doc);
|
|
|
1149 #else
|
|
|
1150 pure_put (sym, Qvariable_documentation, doc);
|
|
|
1151 #endif
|
|
|
1152 if (!NILP (args = XCDR (args)))
|
|
|
1153 error ("too many arguments");
|
|
|
1154 }
|
|
0
|
1155
|
|
|
1156 #ifdef I18N3
|
|
|
1157 if (!NILP (Vfile_domain))
|
|
|
1158 pure_put (sym, Qvariable_domain, Vfile_domain);
|
|
|
1159 #endif
|
|
|
1160
|
|
|
1161 LOADHIST_ATTACH (sym);
|
|
|
1162 return sym;
|
|
|
1163 }
|
|
|
1164
|
|
20
|
1165 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1166 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1167 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1168 Determined by whether the first character of the documentation
|
|
|
1169 for the variable is `*'.
|
|
20
|
1170 */
|
|
|
1171 (variable))
|
|
0
|
1172 {
|
|
|
1173 Lisp_Object documentation;
|
|
185
|
1174
|
|
0
|
1175 documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1176 if (INTP (documentation) && XINT (documentation) < 0)
|
|
|
1177 return Qt;
|
|
|
1178 if ((STRINGP (documentation)) &&
|
|
|
1179 (string_byte (XSTRING (documentation), 0) == '*'))
|
|
|
1180 return Qt;
|
|
|
1181 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1182 if (CONSP (documentation)
|
|
|
1183 && STRINGP (XCAR (documentation))
|
|
|
1184 && INTP (XCDR (documentation))
|
|
|
1185 && XINT (XCDR (documentation)) < 0)
|
|
|
1186 return Qt;
|
|
|
1187 return Qnil;
|
|
185
|
1188 }
|
|
0
|
1189
|
|
20
|
1190 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1191 Return result of expanding macros at top level of FORM.
|
|
|
1192 If FORM is not a macro call, it is returned unchanged.
|
|
|
1193 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1194 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1195
|
|
|
1196 The second optional arg ENVIRONMENT species an environment of macro
|
|
|
1197 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1198 */
|
|
|
1199 (form, env))
|
|
0
|
1200 {
|
|
|
1201 /* This function can GC */
|
|
|
1202 /* With cleanups from Hallvard Furuseth. */
|
|
|
1203 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1204
|
|
|
1205 while (1)
|
|
|
1206 {
|
|
|
1207 /* Come back here each time we expand a macro call,
|
|
|
1208 in case it expands into another macro call. */
|
|
|
1209 if (!CONSP (form))
|
|
|
1210 break;
|
|
|
1211 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1212 def = sym = XCAR (form);
|
|
|
1213 tem = Qnil;
|
|
|
1214 /* Trace symbols aliases to other symbols
|
|
|
1215 until we get a symbol that is not an alias. */
|
|
|
1216 while (SYMBOLP (def))
|
|
|
1217 {
|
|
|
1218 QUIT;
|
|
|
1219 sym = def;
|
|
|
1220 tem = Fassq (sym, env);
|
|
|
1221 if (NILP (tem))
|
|
|
1222 {
|
|
|
1223 def = XSYMBOL (sym)->function;
|
|
|
1224 if (!UNBOUNDP (def))
|
|
|
1225 continue;
|
|
|
1226 }
|
|
|
1227 break;
|
|
|
1228 }
|
|
|
1229 /* Right now TEM is the result from SYM in ENV,
|
|
|
1230 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1231 if (NILP (tem))
|
|
|
1232 {
|
|
|
1233 /* SYM is not mentioned in ENV.
|
|
|
1234 Look at its function definition. */
|
|
|
1235 if (UNBOUNDP (def)
|
|
|
1236 || !CONSP (def))
|
|
|
1237 /* Not defined or definition not suitable */
|
|
|
1238 break;
|
|
|
1239 if (EQ (XCAR (def), Qautoload))
|
|
|
1240 {
|
|
|
1241 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1242 tem = Felt (def, make_int (4));
|
|
|
1243 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1244 {
|
|
|
1245 /* Yes, load it and try again. */
|
|
|
1246 do_autoload (def, sym);
|
|
|
1247 continue;
|
|
|
1248 }
|
|
|
1249 else
|
|
|
1250 break;
|
|
|
1251 }
|
|
|
1252 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1253 break;
|
|
|
1254 else expander = XCDR (def);
|
|
|
1255 }
|
|
|
1256 else
|
|
|
1257 {
|
|
|
1258 expander = XCDR (tem);
|
|
|
1259 if (NILP (expander))
|
|
|
1260 break;
|
|
|
1261 }
|
|
|
1262 form = apply1 (expander, XCDR (form));
|
|
|
1263 }
|
|
|
1264 return form;
|
|
|
1265 }
|
|
|
1266
|
|
|
1267
|
|
|
1268 /**********************************************************************/
|
|
|
1269 /* Non-local exits */
|
|
|
1270 /**********************************************************************/
|
|
|
1271
|
|
20
|
1272 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
272
|
1273 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
0
|
1274 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1275 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1276 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1277 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1278 */
|
|
|
1279 (args))
|
|
0
|
1280 {
|
|
|
1281 /* This function can GC */
|
|
|
1282 Lisp_Object tag;
|
|
|
1283 struct gcpro gcpro1;
|
|
|
1284
|
|
|
1285 GCPRO1 (args);
|
|
272
|
1286 tag = Feval (XCAR (args));
|
|
0
|
1287 UNGCPRO;
|
|
272
|
1288 return internal_catch (tag, Fprogn, XCDR (args), 0);
|
|
0
|
1289 }
|
|
|
1290
|
|
|
1291 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1292 FUNC should return a Lisp_Object.
|
|
|
1293 This is how catches are done from within C code. */
|
|
|
1294
|
|
|
1295 Lisp_Object
|
|
185
|
1296 internal_catch (Lisp_Object tag,
|
|
0
|
1297 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1298 Lisp_Object arg,
|
|
272
|
1299 int * volatile threw)
|
|
0
|
1300 {
|
|
|
1301 /* This structure is made part of the chain `catchlist'. */
|
|
|
1302 struct catchtag c;
|
|
|
1303
|
|
|
1304 /* Fill in the components of c, and put it on the list. */
|
|
|
1305 c.next = catchlist;
|
|
|
1306 c.tag = tag;
|
|
|
1307 c.val = Qnil;
|
|
|
1308 c.backlist = backtrace_list;
|
|
|
1309 #if 0 /* FSFmacs */
|
|
|
1310 /* #### */
|
|
|
1311 c.handlerlist = handlerlist;
|
|
|
1312 #endif
|
|
|
1313 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1314 c.pdlcount = specpdl_depth_counter;
|
|
|
1315 #if 0 /* FSFmacs */
|
|
|
1316 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1317 #endif
|
|
|
1318 c.gcpro = gcprolist;
|
|
|
1319 catchlist = &c;
|
|
|
1320
|
|
|
1321 /* Call FUNC. */
|
|
|
1322 if (SETJMP (c.jmp))
|
|
|
1323 {
|
|
|
1324 /* Throw works by a longjmp that comes right here. */
|
|
|
1325 if (threw) *threw = 1;
|
|
173
|
1326 return c.val;
|
|
0
|
1327 }
|
|
|
1328 c.val = (*func) (arg);
|
|
|
1329 if (threw) *threw = 0;
|
|
|
1330 catchlist = c.next;
|
|
173
|
1331 return c.val;
|
|
0
|
1332 }
|
|
|
1333
|
|
|
1334
|
|
|
1335 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1336 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1337
|
|
|
1338 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1339 they choose the catch tag to throw to. A catch tag for a
|
|
|
1340 condition-case form has a TAG of Qnil.
|
|
|
1341
|
|
|
1342 Before each catch is discarded, unbind all special bindings and
|
|
|
1343 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1344 the handler stack as we go, so that the proper handlers are in
|
|
|
1345 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1346 some static info saved in CATCH, and longjmp to the location
|
|
|
1347 specified in the
|
|
|
1348
|
|
|
1349 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1350
|
|
|
1351 static void
|
|
|
1352 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1353 {
|
|
|
1354 #if 0 /* FSFmacs */
|
|
|
1355 /* #### */
|
|
203
|
1356 REGISTER int last_time;
|
|
0
|
1357 #endif
|
|
|
1358
|
|
|
1359 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1360 Before each catch is discarded, unbind all special bindings
|
|
|
1361 and execute all unwind-protect clauses made above that catch.
|
|
|
1362 At the end, restore some static info saved in CATCH,
|
|
|
1363 and longjmp to the location specified.
|
|
|
1364 */
|
|
|
1365
|
|
|
1366 /* Save the value somewhere it will be GC'ed.
|
|
185
|
1367 (Can't overwrite tag slot because an unwind-protect may
|
|
0
|
1368 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1369 c->val = val;
|
|
|
1370
|
|
|
1371 #if 0 /* FSFmacs */
|
|
|
1372 /* Restore the polling-suppression count. */
|
|
|
1373 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1374 #endif
|
|
|
1375
|
|
|
1376 #if 0 /* FSFmacs */
|
|
|
1377 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1378 do
|
|
|
1379 {
|
|
|
1380 last_time = catchlist == c;
|
|
|
1381
|
|
|
1382 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1383 handlers. */
|
|
|
1384 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1385 handlerlist = catchlist->handlerlist;
|
|
|
1386 catchlist = catchlist->next;
|
|
|
1387 }
|
|
|
1388 while (! last_time);
|
|
|
1389 #else /* Actual XEmacs code */
|
|
|
1390 /* Unwind the specpdl stack */
|
|
|
1391 unbind_to (c->pdlcount, Qnil);
|
|
|
1392 catchlist = c->next;
|
|
|
1393 #endif
|
|
|
1394
|
|
|
1395 gcprolist = c->gcpro;
|
|
|
1396 backtrace_list = c->backlist;
|
|
|
1397 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1398
|
|
|
1399 throw_level = 0;
|
|
|
1400 LONGJMP (c->jmp, 1);
|
|
185
|
1401 }
|
|
0
|
1402
|
|
|
1403 static DOESNT_RETURN
|
|
|
1404 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1405 Lisp_Object sig, Lisp_Object data)
|
|
|
1406 {
|
|
211
|
1407 #if 0
|
|
0
|
1408 /* die if we recurse more than is reasonable */
|
|
|
1409 if (++throw_level > 20)
|
|
|
1410 abort();
|
|
211
|
1411 #endif
|
|
0
|
1412
|
|
|
1413 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1414 "last resort" when there is no handler for this error and
|
|
|
1415 the debugger couldn't be invoked, so we are throwing to
|
|
|
1416 'top-level. If this tag doesn't exist (happens during the
|
|
|
1417 initialization stages) we would get in an infinite recursive
|
|
|
1418 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1419 really-early-error-handler.
|
|
|
1420
|
|
|
1421 Note that in fact the only time that the "last resort"
|
|
|
1422 occurs is when there's no catch for 'top-level -- the
|
|
|
1423 'top-level catch and the catch-all error handler are
|
|
|
1424 established at the same time, in initial_command_loop/
|
|
|
1425 top_level_1.
|
|
|
1426
|
|
185
|
1427 #### Fix this horrifitude!
|
|
0
|
1428 */
|
|
185
|
1429
|
|
0
|
1430 while (1)
|
|
|
1431 {
|
|
|
1432 REGISTER struct catchtag *c;
|
|
|
1433
|
|
|
1434 #if 0 /* FSFmacs */
|
|
|
1435 if (!NILP (tag)) /* #### */
|
|
|
1436 #endif
|
|
|
1437 for (c = catchlist; c; c = c->next)
|
|
|
1438 {
|
|
|
1439 if (EQ (c->tag, tag))
|
|
|
1440 unwind_to_catch (c, val);
|
|
|
1441 }
|
|
|
1442 if (!bomb_out_p)
|
|
|
1443 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1444 else
|
|
|
1445 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1446 }
|
|
|
1447
|
|
|
1448 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1449 /* throw_level--; */
|
|
|
1450 /* getting tired of compilation warnings */
|
|
|
1451 /* return Qnil; */
|
|
|
1452 }
|
|
|
1453
|
|
|
1454 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1455 Fthrow() works.
|
|
|
1456
|
|
|
1457 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1458 back to the appropriate condition-case handler after (maybe)
|
|
|
1459 the debugger is entered. In that case, TAG is the value
|
|
|
1460 of Vcondition_handlers that was in place just after the
|
|
|
1461 condition-case handler was set up. The car of this will be
|
|
|
1462 some data referring to the handler: Its car will be Qunbound
|
|
|
1463 (thus, this tag can never be generated by Lisp code), and
|
|
|
1464 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1465 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1466 This works fine because Fthrow() does not care what TAG was
|
|
|
1467 passed to it: it just looks up the catch list for something
|
|
|
1468 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1469 back to the place that established the catch (in this case,
|
|
|
1470 condition_case_1). See below for more info.
|
|
|
1471 */
|
|
|
1472
|
|
20
|
1473 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
272
|
1474 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
0
|
1475 Both TAG and VALUE are evalled.
|
|
20
|
1476 */
|
|
|
1477 (tag, val))
|
|
0
|
1478 {
|
|
|
1479 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1480 return Qnil;
|
|
|
1481 }
|
|
|
1482
|
|
20
|
1483 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1484 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1485 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1486 If BODYFORM completes normally, its value is returned
|
|
|
1487 after executing the UNWINDFORMS.
|
|
|
1488 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1489 */
|
|
|
1490 (args))
|
|
0
|
1491 {
|
|
|
1492 /* This function can GC */
|
|
|
1493 Lisp_Object val;
|
|
|
1494 int speccount = specpdl_depth_counter;
|
|
|
1495
|
|
272
|
1496 record_unwind_protect (Fprogn, XCDR (args));
|
|
|
1497 val = Feval (XCAR (args));
|
|
0
|
1498 return unbind_to (speccount, val);
|
|
|
1499 }
|
|
|
1500
|
|
|
1501
|
|
|
1502 /**********************************************************************/
|
|
|
1503 /* Signalling and trapping errors */
|
|
|
1504 /**********************************************************************/
|
|
|
1505
|
|
|
1506 static Lisp_Object
|
|
|
1507 condition_bind_unwind (Lisp_Object loser)
|
|
|
1508 {
|
|
|
1509 struct Lisp_Cons *victim;
|
|
|
1510 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1511 Lisp_Object tem = XCAR (loser);
|
|
|
1512
|
|
|
1513 while (CONSP (tem))
|
|
|
1514 {
|
|
|
1515 victim = XCONS (tem);
|
|
|
1516 tem = victim->cdr;
|
|
|
1517 free_cons (victim);
|
|
|
1518 }
|
|
|
1519 victim = XCONS (loser);
|
|
|
1520
|
|
|
1521 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1522 Vcondition_handlers = victim->cdr;
|
|
|
1523
|
|
|
1524 free_cons (victim);
|
|
173
|
1525 return Qnil;
|
|
0
|
1526 }
|
|
|
1527
|
|
|
1528 static Lisp_Object
|
|
|
1529 condition_case_unwind (Lisp_Object loser)
|
|
|
1530 {
|
|
|
1531 struct Lisp_Cons *victim;
|
|
|
1532
|
|
|
1533 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1534 victim = XCONS (XCAR (loser));
|
|
|
1535 free_cons (victim);
|
|
|
1536
|
|
|
1537 victim = XCONS (loser);
|
|
|
1538 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1539 Vcondition_handlers = victim->cdr;
|
|
|
1540
|
|
|
1541 free_cons (victim);
|
|
173
|
1542 return Qnil;
|
|
0
|
1543 }
|
|
|
1544
|
|
|
1545 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1546 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1547
|
|
|
1548 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1549 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1550 HANDLERS as something to be caught, the return value of this
|
|
|
1551 function is the return value from BFUN. If such an error does
|
|
|
1552 occur, HFUN is called, and its return value becomes the
|
|
|
1553 return value of condition_case_1(). The second argument passed
|
|
|
1554 to HFUN will always be HARG. The first argument depends on
|
|
|
1555 HANDLERS:
|
|
|
1556
|
|
|
1557 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1558 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1559 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1560 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1561 `debug-on-error' was set.
|
|
|
1562
|
|
|
1563 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1564 debugger is invoked if `debug-on-error' was set.
|
|
|
1565
|
|
|
1566 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1567 exactly as in `condition-case', and errors will be trapped
|
|
|
1568 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1569 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1570 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1571
|
|
|
1572 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1573 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1574 for why), establishes a catch whose tag is this new value of
|
|
|
1575 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1576 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1577 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1578 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1579 jump point we just established, and we in turn just call the
|
|
|
1580 HFUN and return its value.
|
|
|
1581
|
|
|
1582 For a real condition-case, HFUN will always be
|
|
|
1583 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1584 to condition-case. That function just binds VAR to the cons
|
|
|
1585 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1586 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1587 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1588 it had *before* condition_case_1() was called. This maintains
|
|
|
1589 consistency (so that the state of things at exit of
|
|
|
1590 condition_case_1() is the same as at entry), and implies
|
|
|
1591 that the handler can signal the same error again (possibly
|
|
|
1592 after processing of its own), without getting in an infinite
|
|
|
1593 loop. */
|
|
|
1594
|
|
|
1595 Lisp_Object
|
|
|
1596 condition_case_1 (Lisp_Object handlers,
|
|
|
1597 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1598 Lisp_Object barg,
|
|
|
1599 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1600 Lisp_Object harg)
|
|
|
1601 {
|
|
|
1602 int speccount = specpdl_depth_counter;
|
|
|
1603 struct catchtag c;
|
|
|
1604 struct gcpro gcpro1;
|
|
|
1605
|
|
|
1606 #if 0 /* FSFmacs */
|
|
|
1607 c.tag = Qnil;
|
|
|
1608 #else
|
|
|
1609 /* Do consing now so out-of-memory error happens up front */
|
|
|
1610 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1611 which is known specially by Fsignal.
|
|
|
1612 This is an abomination, but to fix it would require either
|
|
|
1613 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1614 or changing the byte-compiler output (no thanks). */
|
|
|
1615 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1616 Vcondition_handlers);
|
|
|
1617 #endif
|
|
|
1618 c.val = Qnil;
|
|
|
1619 c.backlist = backtrace_list;
|
|
|
1620 #if 0 /* FSFmacs */
|
|
|
1621 /* #### */
|
|
|
1622 c.handlerlist = handlerlist;
|
|
|
1623 #endif
|
|
|
1624 c.lisp_eval_depth = lisp_eval_depth;
|
|
|
1625 c.pdlcount = specpdl_depth_counter;
|
|
|
1626 #if 0 /* FSFmacs */
|
|
|
1627 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1628 #endif
|
|
|
1629 c.gcpro = gcprolist;
|
|
|
1630 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1631 c.next = catchlist;
|
|
|
1632
|
|
|
1633 if (SETJMP (c.jmp))
|
|
|
1634 {
|
|
|
1635 /* throw does ungcpro, etc */
|
|
173
|
1636 return (*hfun) (c.val, harg);
|
|
0
|
1637 }
|
|
|
1638
|
|
|
1639 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1640
|
|
|
1641 catchlist = &c;
|
|
|
1642 #if 0 /* FSFmacs */
|
|
|
1643 h.handler = handlers;
|
|
|
1644 h.var = Qnil;
|
|
|
1645 h.next = handlerlist;
|
|
|
1646 h.tag = &c;
|
|
|
1647 handlerlist = &h;
|
|
|
1648 #else
|
|
|
1649 Vcondition_handlers = c.tag;
|
|
|
1650 #endif
|
|
|
1651 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1652
|
|
|
1653 c.val = ((*bfun) (barg));
|
|
|
1654
|
|
|
1655 /* The following is *not* true: (ben)
|
|
|
1656
|
|
|
1657 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1658 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1659 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1660 UNGCPRO;
|
|
|
1661 catchlist = c.next;
|
|
|
1662 Vcondition_handlers = XCDR (c.tag);
|
|
|
1663
|
|
173
|
1664 return unbind_to (speccount, c.val);
|
|
0
|
1665 }
|
|
|
1666
|
|
|
1667 static Lisp_Object
|
|
|
1668 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1669 {
|
|
|
1670 /* This function can GC */
|
|
|
1671 #if 0 /* FSFmacs */
|
|
|
1672 if (!NILP (h.var))
|
|
|
1673 specbind (h.var, c.val);
|
|
|
1674 val = Fprogn (Fcdr (h.chosen_clause));
|
|
185
|
1675
|
|
0
|
1676 /* Note that this just undoes the binding of h.var; whoever
|
|
|
1677 longjumped to us unwound the stack to c.pdlcount before
|
|
|
1678 throwing. */
|
|
|
1679 unbind_to (c.pdlcount, Qnil);
|
|
|
1680 return val;
|
|
|
1681 #else
|
|
|
1682 int speccount;
|
|
|
1683
|
|
|
1684 if (NILP (var))
|
|
173
|
1685 return Fprogn (Fcdr (val)); /* tailcall */
|
|
0
|
1686
|
|
|
1687 speccount = specpdl_depth_counter;
|
|
|
1688 specbind (var, Fcar (val));
|
|
|
1689 val = Fprogn (Fcdr (val));
|
|
|
1690 return unbind_to (speccount, val);
|
|
|
1691 #endif
|
|
|
1692 }
|
|
|
1693
|
|
|
1694 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1695 condition-case except that it takes three arguments rather
|
|
|
1696 than a single list of arguments. */
|
|
|
1697 Lisp_Object
|
|
272
|
1698 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
0
|
1699 {
|
|
|
1700 /* This function can GC */
|
|
|
1701 Lisp_Object val;
|
|
|
1702
|
|
|
1703 CHECK_SYMBOL (var);
|
|
|
1704
|
|
|
1705 for (val = handlers; ! NILP (val); val = Fcdr (val))
|
|
|
1706 {
|
|
|
1707 Lisp_Object tem;
|
|
|
1708 tem = Fcar (val);
|
|
185
|
1709 if ((!NILP (tem))
|
|
0
|
1710 && (!CONSP (tem)
|
|
|
1711 || (!SYMBOLP (XCAR (tem)) && !CONSP (XCAR (tem)))))
|
|
|
1712 signal_simple_error ("Invalid condition handler", tem);
|
|
|
1713 }
|
|
|
1714
|
|
185
|
1715 return condition_case_1 (handlers,
|
|
0
|
1716 Feval, bodyform,
|
|
|
1717 run_condition_case_handlers,
|
|
|
1718 var);
|
|
|
1719 }
|
|
|
1720
|
|
20
|
1721 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1722 Regain control when an error is signalled.
|
|
|
1723 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
|
1724 executes BODYFORM and returns its value if no error happens.
|
|
|
1725 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1726 where the BODY is made of Lisp expressions.
|
|
|
1727
|
|
|
1728 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1729 error's condition names. If an error happens, the first applicable
|
|
|
1730 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1731 all errors, even those without the `error' condition name on them
|
|
272
|
1732 \(e.g. `quit').
|
|
0
|
1733
|
|
|
1734 The car of a handler may be a list of condition names
|
|
|
1735 instead of a single condition name.
|
|
|
1736
|
|
|
1737 When a handler handles an error,
|
|
|
1738 control returns to the condition-case and the handler BODY... is executed
|
|
|
1739 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1740 VAR may be nil; then you do not get access to the signal information.
|
|
|
1741
|
|
|
1742 The value of the last BODY form is returned from the condition-case.
|
|
|
1743 See also the function `signal' for more info.
|
|
|
1744
|
|
|
1745 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1746 and the current catches, condition-cases, and bindings have all been
|
|
|
1747 popped back to the state they were in just before the call to
|
|
|
1748 `condition-case'. This means that resignalling the error from
|
|
|
1749 within the handler will not result in an infinite loop.
|
|
|
1750
|
|
|
1751 If you want to establish an error handler that is called with the
|
|
|
1752 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1753 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1754 */
|
|
70
|
1755 (args))
|
|
0
|
1756 {
|
|
|
1757 /* This function can GC */
|
|
272
|
1758 return condition_case_3 (XCAR (XCDR (args)),
|
|
|
1759 XCAR (args),
|
|
|
1760 XCDR (XCDR (args)));
|
|
185
|
1761 }
|
|
0
|
1762
|
|
20
|
1763 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1764 Regain control when an error is signalled, without popping the stack.
|
|
|
1765 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1766 This function is similar to `condition-case', but the handler is invoked
|
|
|
1767 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1768 that was current when `signal' was called, rather than when the handler
|
|
|
1769 was established.
|
|
|
1770
|
|
|
1771 HANDLER should be a function of one argument, which is a cons of the args
|
|
272
|
1772 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
0
|
1773 `signal' is called (this differs from `condition-case', which allows
|
|
|
1774 you to specify which errors are trapped). If the handler function
|
|
|
1775 returns, `signal' continues as if the handler were never invoked.
|
|
272
|
1776 \(It continues to look for handlers established earlier than this one,
|
|
0
|
1777 and invokes the standard error-handler if none is found.)
|
|
20
|
1778 */
|
|
272
|
1779 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1780 {
|
|
|
1781 /* This function can GC */
|
|
|
1782 int speccount = specpdl_depth_counter;
|
|
|
1783 Lisp_Object tem;
|
|
|
1784
|
|
|
1785 /* #### If there were a way to check that args[0] were a function
|
|
|
1786 which accepted one arg, that should be done here ... */
|
|
|
1787
|
|
|
1788 /* (handler-fun . handler-args) */
|
|
|
1789 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
|
1790 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1791 Vcondition_handlers = tem;
|
|
|
1792
|
|
|
1793 /* Caller should have GC-protected args */
|
|
|
1794 tem = Ffuncall (nargs - 1, args + 1);
|
|
173
|
1795 return unbind_to (speccount, tem);
|
|
0
|
1796 }
|
|
|
1797
|
|
|
1798 static int
|
|
|
1799 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1800 {
|
|
|
1801 if (EQ (type, Qt))
|
|
|
1802 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1803 * Use with caution! */
|
|
173
|
1804 return 1;
|
|
0
|
1805 else
|
|
|
1806 {
|
|
|
1807 if (SYMBOLP (type))
|
|
|
1808 {
|
|
173
|
1809 return !NILP (Fmemq (type, conditions));
|
|
0
|
1810 }
|
|
|
1811 else if (CONSP (type))
|
|
|
1812 {
|
|
|
1813 while (CONSP (type))
|
|
|
1814 {
|
|
|
1815 if (!NILP (Fmemq (Fcar (type), conditions)))
|
|
|
1816 return 1;
|
|
|
1817 type = XCDR (type);
|
|
|
1818 }
|
|
|
1819 return 0;
|
|
|
1820 }
|
|
|
1821 else
|
|
|
1822 return 0;
|
|
|
1823 }
|
|
|
1824 }
|
|
|
1825
|
|
|
1826 static Lisp_Object
|
|
|
1827 return_from_signal (Lisp_Object value)
|
|
|
1828 {
|
|
251
|
1829 #if 1
|
|
0
|
1830 /* Most callers are not prepared to handle gc if this
|
|
|
1831 returns. So, since this feature is not very useful,
|
|
|
1832 take it out. */
|
|
|
1833 /* Have called debugger; return value to signaller */
|
|
173
|
1834 return value;
|
|
0
|
1835 #else /* But the reality is that that stinks, because: */
|
|
|
1836 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1837 to be continuable!! */
|
|
|
1838 error ("Returning a value from an error is no longer supported");
|
|
|
1839 #endif
|
|
|
1840 }
|
|
|
1841
|
|
|
1842 extern int in_display;
|
|
|
1843
|
|
|
1844
|
|
|
1845 /****************** the workhorse error-signaling function ******************/
|
|
|
1846
|
|
|
1847 /* #### This function has not been synched with FSF. It diverges
|
|
|
1848 significantly. */
|
|
|
1849
|
|
|
1850 static Lisp_Object
|
|
|
1851 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1852 {
|
|
|
1853 /* This function can GC */
|
|
|
1854 struct gcpro gcpro1, gcpro2;
|
|
|
1855 Lisp_Object conditions;
|
|
|
1856 Lisp_Object handlers;
|
|
|
1857 /* signal_call_debugger() could get called more than once
|
|
|
1858 (once when a call-with-condition-handler is about to
|
|
|
1859 be dealt with, and another when a condition-case handler
|
|
|
1860 is about to be invoked). So make sure the debugger and/or
|
|
|
1861 stack trace aren't done more than once. */
|
|
|
1862 int stack_trace_displayed = 0;
|
|
|
1863 int debugger_entered = 0;
|
|
|
1864 GCPRO2 (conditions, handlers);
|
|
|
1865
|
|
|
1866 if (!initialized)
|
|
|
1867 {
|
|
|
1868 /* who knows how much has been initialized? Safest bet is
|
|
|
1869 just to bomb out immediately. */
|
|
|
1870 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1871 abort ();
|
|
|
1872 }
|
|
|
1873
|
|
|
1874 if (gc_in_progress || in_display)
|
|
|
1875 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1876 There is no sensible way to handle errors there. */
|
|
|
1877 abort ();
|
|
|
1878
|
|
|
1879 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1880
|
|
|
1881 for (handlers = Vcondition_handlers;
|
|
|
1882 CONSP (handlers);
|
|
|
1883 handlers = XCDR (handlers))
|
|
|
1884 {
|
|
|
1885 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1886 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1887 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1888
|
|
|
1889 if (!UNBOUNDP (handler_fun))
|
|
|
1890 {
|
|
|
1891 /* call-with-condition-handler */
|
|
|
1892 Lisp_Object tem;
|
|
|
1893 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1894 struct gcpro ngcpro1;
|
|
|
1895 NGCPRO1 (all_handlers);
|
|
|
1896 Vcondition_handlers = outer_handlers;
|
|
|
1897
|
|
|
1898 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1899 outer_handlers, 1,
|
|
|
1900 &stack_trace_displayed,
|
|
|
1901 &debugger_entered);
|
|
|
1902 if (!UNBOUNDP (tem))
|
|
|
1903 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1904
|
|
|
1905 tem = Fcons (sig, data);
|
|
|
1906 if (NILP (handler_data))
|
|
|
1907 tem = call1 (handler_fun, tem);
|
|
|
1908 else
|
|
|
1909 {
|
|
|
1910 /* (This code won't be used (for now?).) */
|
|
|
1911 struct gcpro nngcpro1;
|
|
|
1912 Lisp_Object args[3];
|
|
|
1913 NNGCPRO1 (args[0]);
|
|
|
1914 nngcpro1.nvars = 3;
|
|
|
1915 args[0] = handler_fun;
|
|
|
1916 args[1] = tem;
|
|
|
1917 args[2] = handler_data;
|
|
|
1918 nngcpro1.var = args;
|
|
|
1919 tem = Fapply (3, args);
|
|
|
1920 NNUNGCPRO;
|
|
|
1921 }
|
|
|
1922 NUNGCPRO;
|
|
|
1923 #if 0
|
|
|
1924 if (!EQ (tem, Qsignal))
|
|
173
|
1925 return return_from_signal (tem);
|
|
0
|
1926 #endif
|
|
|
1927 /* If handler didn't throw, try another handler */
|
|
|
1928 Vcondition_handlers = all_handlers;
|
|
|
1929 }
|
|
|
1930
|
|
|
1931 /* It's a condition-case handler */
|
|
|
1932
|
|
185
|
1933 /* t is used by handlers for all conditions, set up by C code.
|
|
0
|
1934 * debugger is not called even if debug_on_error */
|
|
|
1935 else if (EQ (handler_data, Qt))
|
|
|
1936 {
|
|
|
1937 UNGCPRO;
|
|
173
|
1938 return Fthrow (handlers, Fcons (sig, data));
|
|
0
|
1939 }
|
|
|
1940 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1941 addition it invokes the debugger if debug_on_error.
|
|
|
1942 This is normally used for the outer command-loop error
|
|
|
1943 handler. */
|
|
|
1944 else if (EQ (handler_data, Qerror))
|
|
|
1945 {
|
|
|
1946 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1947 outer_handlers, 0,
|
|
|
1948 &stack_trace_displayed,
|
|
|
1949 &debugger_entered);
|
|
|
1950
|
|
|
1951 UNGCPRO;
|
|
|
1952 if (!UNBOUNDP (tem))
|
|
173
|
1953 return return_from_signal (tem);
|
|
0
|
1954
|
|
|
1955 tem = Fcons (sig, data);
|
|
173
|
1956 return Fthrow (handlers, tem);
|
|
0
|
1957 }
|
|
|
1958 else
|
|
|
1959 {
|
|
|
1960 /* handler established by real (Lisp) condition-case */
|
|
|
1961 Lisp_Object h;
|
|
|
1962
|
|
|
1963 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1964 {
|
|
|
1965 Lisp_Object clause = Fcar (h);
|
|
|
1966 Lisp_Object tem = Fcar (clause);
|
|
|
1967
|
|
|
1968 if (condition_type_p (tem, conditions))
|
|
|
1969 {
|
|
|
1970 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1971 outer_handlers, 1,
|
|
|
1972 &stack_trace_displayed,
|
|
|
1973 &debugger_entered);
|
|
|
1974 UNGCPRO;
|
|
|
1975 if (!UNBOUNDP (tem))
|
|
173
|
1976 return return_from_signal (tem);
|
|
0
|
1977
|
|
|
1978 /* Doesn't return */
|
|
|
1979 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
173
|
1980 return Fthrow (handlers, tem);
|
|
0
|
1981 }
|
|
|
1982 }
|
|
|
1983 }
|
|
|
1984 }
|
|
|
1985
|
|
|
1986 /* If no handler is present now, try to run the debugger,
|
|
|
1987 and if that fails, throw to top level.
|
|
|
1988
|
|
|
1989 #### The only time that no handler is present is during
|
|
|
1990 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1991 there is no 'top-level catch. (That's why the
|
|
|
1992 "bomb-out" hack was added.)
|
|
|
1993
|
|
185
|
1994 #### Fix this horrifitude!
|
|
0
|
1995 */
|
|
|
1996 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
1997 &stack_trace_displayed,
|
|
|
1998 &debugger_entered);
|
|
|
1999 UNGCPRO;
|
|
|
2000 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2001 return Qnil;
|
|
|
2002 }
|
|
|
2003
|
|
|
2004
|
|
|
2005 /****************** Error functions class 1 ******************/
|
|
|
2006
|
|
|
2007 /* Class 1: General functions that signal an error.
|
|
|
2008 These functions take an error type and a list of associated error
|
|
|
2009 data. */
|
|
|
2010
|
|
|
2011 /* The simplest external error function: it would be called
|
|
|
2012 signal_continuable_error() in the terminology below, but it's
|
|
|
2013 Lisp-callable. */
|
|
|
2014
|
|
20
|
2015 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2016 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2017 An error symbol is a symbol defined using `define-error'.
|
|
|
2018 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2019 If the signal is handled, DATA is made available to the handler.
|
|
|
2020 See also the function `signal-error', and the functions to handle errors:
|
|
|
2021 `condition-case' and `call-with-condition-handler'.
|
|
|
2022
|
|
|
2023 Note that this function can return, if the debugger is invoked and the
|
|
|
2024 user invokes the "return from signal" option.
|
|
20
|
2025 */
|
|
|
2026 (error_symbol, data))
|
|
0
|
2027 {
|
|
|
2028 /* Fsignal() is one of these functions that's called all the time
|
|
|
2029 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2030 protect the objects because all sorts of weird stuff could
|
|
|
2031 happen. */
|
|
|
2032
|
|
|
2033 struct gcpro gcpro1;
|
|
|
2034
|
|
|
2035 GCPRO1 (data);
|
|
|
2036 if (!NILP (Vcurrent_error_state))
|
|
|
2037 {
|
|
|
2038 if (!NILP (Vcurrent_warning_class))
|
|
|
2039 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2040 Fcons (error_symbol, data));
|
|
|
2041 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2042 abort (); /* Better not get here! */
|
|
|
2043 }
|
|
|
2044 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2045 }
|
|
|
2046
|
|
|
2047 /* Signal a non-continuable error. */
|
|
|
2048
|
|
|
2049 DOESNT_RETURN
|
|
|
2050 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2051 {
|
|
|
2052 for (;;)
|
|
|
2053 Fsignal (sig, data);
|
|
|
2054 }
|
|
|
2055
|
|
|
2056 static Lisp_Object
|
|
|
2057 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2058 {
|
|
|
2059 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
173
|
2060 return primitive_funcall ((lisp_fn_t) get_opaque_ptr (kludgy_args[0]),
|
|
|
2061 XINT (kludgy_args[1]), kludgy_args + 2);
|
|
0
|
2062 }
|
|
|
2063
|
|
|
2064 static Lisp_Object
|
|
|
2065 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2066 {
|
|
|
2067 Vcurrent_warning_class = warning_class;
|
|
|
2068 return Qnil;
|
|
|
2069 }
|
|
|
2070
|
|
|
2071 static Lisp_Object
|
|
|
2072 restore_current_error_state (Lisp_Object error_state)
|
|
|
2073 {
|
|
|
2074 Vcurrent_error_state = error_state;
|
|
|
2075 return Qnil;
|
|
|
2076 }
|
|
|
2077
|
|
|
2078 /* Many functions would like to do one of three things if an error
|
|
|
2079 occurs:
|
|
|
2080
|
|
|
2081 (1) signal the error, as usual.
|
|
|
2082 (2) silently fail and return some error value.
|
|
|
2083 (3) do as (2) but issue a warning in the process.
|
|
|
2084
|
|
|
2085 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2086 value and calls maybe_signal_error() and other such functions.
|
|
|
2087 This approach is inherently error-prone and broken. A much
|
|
|
2088 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2089 Wrap this around any function in which you might want errors
|
|
|
2090 to not be errors.
|
|
|
2091 */
|
|
|
2092
|
|
|
2093 Lisp_Object
|
|
179
|
2094 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
0
|
2095 Lisp_Object class, Error_behavior errb,
|
|
|
2096 int nargs, ...)
|
|
|
2097 {
|
|
|
2098 va_list vargs;
|
|
|
2099 int speccount;
|
|
|
2100 Lisp_Object kludgy_args[22];
|
|
|
2101 Lisp_Object *args = kludgy_args + 2;
|
|
|
2102 int i;
|
|
|
2103 Lisp_Object no_error;
|
|
|
2104
|
|
|
2105 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2106 assert (!NILP (class));
|
|
|
2107 assert (nargs >= 0 && nargs < 20);
|
|
|
2108
|
|
|
2109 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2110 already trapped, we leave them trapped.)
|
|
|
2111
|
|
|
2112 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2113
|
|
|
2114 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2115 were previously enabled. However, we never change the
|
|
|
2116 warning class from one to another. */
|
|
|
2117 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2118 {
|
|
|
2119 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2120 class = Qnil;
|
|
|
2121 errb = ERROR_ME_NOT;
|
|
|
2122 no_error = Qt;
|
|
|
2123 }
|
|
|
2124 else
|
|
|
2125 no_error = Qnil;
|
|
185
|
2126
|
|
0
|
2127 va_start (vargs, nargs);
|
|
|
2128 for (i = 0; i < nargs; i++)
|
|
|
2129 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2130 va_end (vargs);
|
|
|
2131
|
|
|
2132 /* If error-checking is not disabled, just call the function.
|
|
|
2133 It's important not to override disabled error-checking with
|
|
|
2134 enabled error-checking. */
|
|
185
|
2135
|
|
0
|
2136 if (ERRB_EQ (errb, ERROR_ME))
|
|
|
2137 return primitive_funcall (fun, nargs, args);
|
|
|
2138
|
|
272
|
2139 speccount = specpdl_depth_counter;
|
|
0
|
2140 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2141 {
|
|
|
2142 /* If we're currently calling for no warnings, then make it so.
|
|
|
2143 If we're currently calling for warnings and we weren't
|
|
|
2144 previously, then set our warning class; otherwise, leave
|
|
|
2145 the existing one alone. */
|
|
|
2146 record_unwind_protect (restore_current_warning_class,
|
|
|
2147 Vcurrent_warning_class);
|
|
|
2148 Vcurrent_warning_class = class;
|
|
|
2149 }
|
|
|
2150 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2151 {
|
|
|
2152 record_unwind_protect (restore_current_error_state,
|
|
|
2153 Vcurrent_error_state);
|
|
|
2154 Vcurrent_error_state = no_error;
|
|
|
2155 }
|
|
|
2156
|
|
|
2157 {
|
|
|
2158 int threw;
|
|
|
2159 Lisp_Object the_retval;
|
|
|
2160 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2161 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2162 struct gcpro gcpro1, gcpro2;
|
|
|
2163
|
|
|
2164 GCPRO2 (opaque1, opaque2);
|
|
|
2165 kludgy_args[0] = opaque2;
|
|
|
2166 kludgy_args[1] = make_int (nargs);
|
|
|
2167 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2168 call_with_suspended_errors_1,
|
|
|
2169 opaque1, &threw);
|
|
|
2170 free_opaque_ptr (opaque1);
|
|
|
2171 free_opaque_ptr (opaque2);
|
|
|
2172 UNGCPRO;
|
|
|
2173 /* Use the returned value except in non-local exit, when
|
|
|
2174 RETVAL applies. */
|
|
272
|
2175 /* Some perverse compilers require the perverse cast below. */
|
|
|
2176 return unbind_to (speccount,
|
|
|
2177 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
0
|
2178 }
|
|
|
2179 }
|
|
|
2180
|
|
|
2181 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2182 according to ERRB. CLASS is the class of warning and should
|
|
|
2183 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2184 Qresource, etc.). */
|
|
|
2185
|
|
|
2186 void
|
|
|
2187 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2188 Error_behavior errb)
|
|
|
2189 {
|
|
|
2190 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2191 return;
|
|
|
2192 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2193 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2194 else
|
|
|
2195 for (;;)
|
|
|
2196 Fsignal (sig, data);
|
|
|
2197 }
|
|
|
2198
|
|
|
2199 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2200 according to ERRB. */
|
|
|
2201
|
|
|
2202 Lisp_Object
|
|
|
2203 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2204 Lisp_Object class, Error_behavior errb)
|
|
|
2205 {
|
|
|
2206 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2207 return Qnil;
|
|
|
2208 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2209 {
|
|
|
2210 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2211 return Qnil;
|
|
|
2212 }
|
|
|
2213 else
|
|
|
2214 return Fsignal (sig, data);
|
|
|
2215 }
|
|
|
2216
|
|
|
2217
|
|
|
2218 /****************** Error functions class 2 ******************/
|
|
|
2219
|
|
|
2220 /* Class 2: Printf-like functions that signal an error.
|
|
|
2221 These functions signal an error of type Qerror, whose data
|
|
|
2222 is a single string, created using the arguments. */
|
|
|
2223
|
|
|
2224 /* dump an error message; called like printf */
|
|
|
2225
|
|
|
2226 DOESNT_RETURN
|
|
|
2227 error (CONST char *fmt, ...)
|
|
|
2228 {
|
|
|
2229 Lisp_Object obj;
|
|
|
2230 va_list args;
|
|
|
2231
|
|
|
2232 va_start (args, fmt);
|
|
|
2233 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2234 args);
|
|
|
2235 va_end (args);
|
|
|
2236
|
|
|
2237 /* Fsignal GC-protects its args */
|
|
|
2238 signal_error (Qerror, list1 (obj));
|
|
|
2239 }
|
|
|
2240
|
|
|
2241 void
|
|
|
2242 maybe_error (Lisp_Object class, Error_behavior errb, CONST char *fmt, ...)
|
|
|
2243 {
|
|
|
2244 Lisp_Object obj;
|
|
|
2245 va_list args;
|
|
|
2246
|
|
|
2247 /* Optimization: */
|
|
|
2248 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2249 return;
|
|
|
2250
|
|
|
2251 va_start (args, fmt);
|
|
|
2252 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2253 args);
|
|
|
2254 va_end (args);
|
|
|
2255
|
|
|
2256 /* Fsignal GC-protects its args */
|
|
|
2257 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2258 }
|
|
|
2259
|
|
|
2260 Lisp_Object
|
|
|
2261 continuable_error (CONST char *fmt, ...)
|
|
|
2262 {
|
|
|
2263 Lisp_Object obj;
|
|
|
2264 va_list args;
|
|
|
2265
|
|
|
2266 va_start (args, fmt);
|
|
|
2267 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2268 args);
|
|
|
2269 va_end (args);
|
|
|
2270
|
|
|
2271 /* Fsignal GC-protects its args */
|
|
|
2272 return Fsignal (Qerror, list1 (obj));
|
|
|
2273 }
|
|
|
2274
|
|
|
2275 Lisp_Object
|
|
|
2276 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
|
2277 CONST char *fmt, ...)
|
|
|
2278 {
|
|
|
2279 Lisp_Object obj;
|
|
|
2280 va_list args;
|
|
|
2281
|
|
|
2282 /* Optimization: */
|
|
|
2283 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2284 return Qnil;
|
|
|
2285
|
|
|
2286 va_start (args, fmt);
|
|
|
2287 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2288 args);
|
|
|
2289 va_end (args);
|
|
|
2290
|
|
|
2291 /* Fsignal GC-protects its args */
|
|
|
2292 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2293 }
|
|
|
2294
|
|
|
2295
|
|
|
2296 /****************** Error functions class 3 ******************/
|
|
|
2297
|
|
|
2298 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2299 These functions signal an error of type Qerror, whose data
|
|
|
2300 is two objects, a string and a related Lisp object (usually the object
|
|
|
2301 where the error is occurring). */
|
|
|
2302
|
|
|
2303 DOESNT_RETURN
|
|
|
2304 signal_simple_error (CONST char *reason, Lisp_Object frob)
|
|
|
2305 {
|
|
|
2306 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2307 }
|
|
|
2308
|
|
|
2309 void
|
|
|
2310 maybe_signal_simple_error (CONST char *reason, Lisp_Object frob,
|
|
|
2311 Lisp_Object class, Error_behavior errb)
|
|
|
2312 {
|
|
|
2313 /* Optimization: */
|
|
|
2314 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2315 return;
|
|
|
2316 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2317 class, errb);
|
|
|
2318 }
|
|
|
2319
|
|
|
2320 Lisp_Object
|
|
|
2321 signal_simple_continuable_error (CONST char *reason, Lisp_Object frob)
|
|
|
2322 {
|
|
|
2323 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2324 }
|
|
|
2325
|
|
|
2326 Lisp_Object
|
|
|
2327 maybe_signal_simple_continuable_error (CONST char *reason, Lisp_Object frob,
|
|
|
2328 Lisp_Object class, Error_behavior errb)
|
|
|
2329 {
|
|
|
2330 /* Optimization: */
|
|
|
2331 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2332 return Qnil;
|
|
|
2333 return maybe_signal_continuable_error
|
|
|
2334 (Qerror, list2 (build_translated_string (reason),
|
|
|
2335 frob), class, errb);
|
|
185
|
2336 }
|
|
0
|
2337
|
|
|
2338
|
|
|
2339 /****************** Error functions class 4 ******************/
|
|
|
2340
|
|
|
2341 /* Class 4: Printf-like functions that signal an error.
|
|
|
2342 These functions signal an error of type Qerror, whose data
|
|
|
2343 is a two objects, a string (created using the arguments) and a
|
|
|
2344 Lisp object.
|
|
|
2345 */
|
|
|
2346
|
|
|
2347 DOESNT_RETURN
|
|
|
2348 error_with_frob (Lisp_Object frob, 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 signal_error (Qerror, list2 (obj, frob));
|
|
|
2360 }
|
|
|
2361
|
|
|
2362 void
|
|
|
2363 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2364 Error_behavior errb, 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;
|
|
|
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 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2380 }
|
|
|
2381
|
|
|
2382 Lisp_Object
|
|
|
2383 continuable_error_with_frob (Lisp_Object frob, CONST char *fmt, ...)
|
|
|
2384 {
|
|
|
2385 Lisp_Object obj;
|
|
|
2386 va_list args;
|
|
|
2387
|
|
|
2388 va_start (args, fmt);
|
|
|
2389 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2390 args);
|
|
|
2391 va_end (args);
|
|
|
2392
|
|
|
2393 /* Fsignal GC-protects its args */
|
|
|
2394 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2395 }
|
|
|
2396
|
|
|
2397 Lisp_Object
|
|
|
2398 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
|
2399 Error_behavior errb, CONST char *fmt, ...)
|
|
|
2400 {
|
|
|
2401 Lisp_Object obj;
|
|
|
2402 va_list args;
|
|
|
2403
|
|
|
2404 /* Optimization: */
|
|
|
2405 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2406 return Qnil;
|
|
|
2407
|
|
|
2408 va_start (args, fmt);
|
|
|
2409 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
|
2410 args);
|
|
|
2411 va_end (args);
|
|
|
2412
|
|
|
2413 /* Fsignal GC-protects its args */
|
|
|
2414 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2415 class, errb);
|
|
|
2416 }
|
|
|
2417
|
|
|
2418
|
|
|
2419 /****************** Error functions class 5 ******************/
|
|
|
2420
|
|
|
2421 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2422 These functions signal an error of type Qerror, whose data
|
|
|
2423 is three objects, a string and two related Lisp objects. */
|
|
|
2424
|
|
|
2425 DOESNT_RETURN
|
|
|
2426 signal_simple_error_2 (CONST char *reason,
|
|
|
2427 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2428 {
|
|
|
2429 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2430 frob1));
|
|
|
2431 }
|
|
|
2432
|
|
|
2433 void
|
|
|
2434 maybe_signal_simple_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2435 Lisp_Object frob1, Lisp_Object class,
|
|
|
2436 Error_behavior errb)
|
|
|
2437 {
|
|
|
2438 /* Optimization: */
|
|
|
2439 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2440 return;
|
|
|
2441 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2442 frob1), class, errb);
|
|
|
2443 }
|
|
|
2444
|
|
|
2445
|
|
|
2446 Lisp_Object
|
|
|
2447 signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2448 Lisp_Object frob1)
|
|
|
2449 {
|
|
|
2450 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2451 frob1));
|
|
|
2452 }
|
|
|
2453
|
|
|
2454 Lisp_Object
|
|
|
2455 maybe_signal_simple_continuable_error_2 (CONST char *reason, Lisp_Object frob0,
|
|
|
2456 Lisp_Object frob1, Lisp_Object class,
|
|
|
2457 Error_behavior errb)
|
|
|
2458 {
|
|
|
2459 /* Optimization: */
|
|
|
2460 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2461 return Qnil;
|
|
|
2462 return maybe_signal_continuable_error
|
|
|
2463 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2464 frob1),
|
|
|
2465 class, errb);
|
|
|
2466 }
|
|
|
2467
|
|
|
2468
|
|
|
2469 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2470 void
|
|
|
2471 signal_quit (void)
|
|
|
2472 {
|
|
|
2473 /* This function can GC */
|
|
|
2474 if (EQ (Vquit_flag, Qcritical))
|
|
|
2475 debug_on_quit |= 2; /* set critical bit. */
|
|
185
|
2476 Vquit_flag = Qnil;
|
|
0
|
2477 /* note that this is continuable. */
|
|
|
2478 Fsignal (Qquit, Qnil);
|
|
|
2479 }
|
|
|
2480
|
|
|
2481
|
|
|
2482 /**********************************************************************/
|
|
|
2483 /* User commands */
|
|
|
2484 /**********************************************************************/
|
|
|
2485
|
|
20
|
2486 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
272
|
2487 Return t if FUNCTION makes provisions for interactive calling.
|
|
0
|
2488 This means it contains a description for how to read arguments to give it.
|
|
|
2489 The value is nil for an invalid function or a symbol with no function
|
|
|
2490 definition.
|
|
|
2491
|
|
|
2492 Interactively callable functions include
|
|
|
2493
|
|
|
2494 -- strings and vectors (treated as keyboard macros)
|
|
|
2495 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2496 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2497 (i.e. the interactive flag)
|
|
|
2498 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2499 value
|
|
|
2500 -- subrs (built-in functions) that are interactively callable
|
|
|
2501
|
|
|
2502 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2503 */
|
|
|
2504 (function))
|
|
0
|
2505 {
|
|
272
|
2506 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2507
|
|
0
|
2508 if (UNBOUNDP (fun))
|
|
|
2509 return Qnil;
|
|
|
2510
|
|
|
2511 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2512 interactive spec. */
|
|
|
2513 if (SUBRP (fun))
|
|
149
|
2514 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2515
|
|
|
2516 if (COMPILED_FUNCTIONP (fun))
|
|
|
2517 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
0
|
2518
|
|
|
2519 /* Strings and vectors are keyboard macros. */
|
|
|
2520 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2521 return Qt;
|
|
|
2522
|
|
|
2523 /* Lists may represent commands. */
|
|
|
2524 if (!CONSP (fun))
|
|
|
2525 return Qnil;
|
|
272
|
2526 {
|
|
|
2527 Lisp_Object funcar = XCAR (fun);
|
|
|
2528 if (!SYMBOLP (funcar))
|
|
|
2529 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
2530 if (EQ (funcar, Qlambda))
|
|
|
2531 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2532 if (EQ (funcar, Qautoload))
|
|
|
2533 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2534 else
|
|
|
2535 return Qnil;
|
|
|
2536 }
|
|
0
|
2537 }
|
|
|
2538
|
|
20
|
2539 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2540 Execute CMD as an editor command.
|
|
|
2541 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2542 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2543 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2544 when reading the arguments.
|
|
20
|
2545 */
|
|
|
2546 (cmd, record, keys))
|
|
0
|
2547 {
|
|
|
2548 /* This function can GC */
|
|
|
2549 Lisp_Object prefixarg;
|
|
|
2550 Lisp_Object final = cmd;
|
|
|
2551 struct backtrace backtrace;
|
|
|
2552 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2553
|
|
|
2554 prefixarg = con->prefix_arg;
|
|
|
2555 con->prefix_arg = Qnil;
|
|
|
2556 Vcurrent_prefix_arg = prefixarg;
|
|
|
2557 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2558
|
|
|
2559 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
|
2560 return run_hook (Vdisabled_command_hook);
|
|
|
2561
|
|
|
2562 for (;;)
|
|
|
2563 {
|
|
|
2564 final = indirect_function (cmd, 1);
|
|
|
2565 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2566 do_autoload (final, cmd);
|
|
|
2567 else
|
|
|
2568 break;
|
|
|
2569 }
|
|
|
2570
|
|
|
2571 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2572 {
|
|
|
2573 #ifdef EMACS_BTL
|
|
|
2574 backtrace.id_number = 0;
|
|
|
2575 #endif
|
|
|
2576 backtrace.function = &Qcall_interactively;
|
|
|
2577 backtrace.args = &cmd;
|
|
|
2578 backtrace.nargs = 1;
|
|
|
2579 backtrace.evalargs = 0;
|
|
272
|
2580 backtrace.pdlcount = specpdl_depth_counter;
|
|
0
|
2581 backtrace.debug_on_exit = 0;
|
|
116
|
2582 PUSH_BACKTRACE (backtrace);
|
|
0
|
2583
|
|
|
2584 final = Fcall_interactively (cmd, record, keys);
|
|
|
2585
|
|
116
|
2586 POP_BACKTRACE (backtrace);
|
|
173
|
2587 return final;
|
|
0
|
2588 }
|
|
|
2589 else if (STRINGP (final) || VECTORP (final))
|
|
|
2590 {
|
|
|
2591 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2592 }
|
|
|
2593 else
|
|
|
2594 {
|
|
|
2595 Fsignal (Qwrong_type_argument,
|
|
|
2596 Fcons (Qcommandp,
|
|
|
2597 ((EQ (cmd, final))
|
|
|
2598 ? list1 (cmd)
|
|
|
2599 : list2 (cmd, final))));
|
|
|
2600 return Qnil;
|
|
|
2601 }
|
|
|
2602 }
|
|
|
2603
|
|
20
|
2604 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2605 Return t if function in which this appears was called interactively.
|
|
|
2606 This means that the function was called with call-interactively (which
|
|
|
2607 includes being called as the binding of a key)
|
|
|
2608 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2609 */
|
|
|
2610 ())
|
|
0
|
2611 {
|
|
|
2612 REGISTER struct backtrace *btp;
|
|
|
2613 REGISTER Lisp_Object fun;
|
|
|
2614
|
|
|
2615 if (!INTERACTIVE)
|
|
|
2616 return Qnil;
|
|
|
2617
|
|
|
2618 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2619 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2620 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2621 compiled function. */
|
|
|
2622 btp = backtrace_list;
|
|
|
2623
|
|
|
2624 #if 0 /* FSFmacs */
|
|
|
2625
|
|
|
2626 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2627 out which one is more correct. */
|
|
|
2628 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2629 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2630 fun = Findirect_function (*btp->function);
|
|
|
2631 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2632 btp = btp->next;
|
|
|
2633
|
|
|
2634 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2635 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2636 definition, this function isn't really being called
|
|
|
2637 interactively, but because that's the way Emacs 18 always builds
|
|
|
2638 byte-compiled functions, we'll accept it for now. */
|
|
|
2639 if (EQ (*btp->function, Qbyte_code))
|
|
|
2640 btp = btp->next;
|
|
|
2641
|
|
|
2642 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2643 looking at several frames for special forms. Skip past them. */
|
|
185
|
2644 while (btp &&
|
|
0
|
2645 btp->nargs == UNEVALLED)
|
|
|
2646 btp = btp->next;
|
|
|
2647
|
|
|
2648 #else
|
|
|
2649
|
|
|
2650 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2651 btp = btp->next;
|
|
|
2652 for (;
|
|
|
2653 btp && (btp->nargs == UNEVALLED
|
|
|
2654 || EQ (*btp->function, Qbyte_code));
|
|
|
2655 btp = btp->next)
|
|
|
2656 {}
|
|
|
2657 /* btp now points at the frame of the innermost function
|
|
|
2658 that DOES eval its args.
|
|
|
2659 If it is a built-in function (such as load or eval-region)
|
|
|
2660 return nil. */
|
|
|
2661 /* Beats me why this is necessary, but it is */
|
|
|
2662 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2663 return Qt;
|
|
|
2664
|
|
|
2665 #endif
|
|
|
2666
|
|
|
2667 fun = Findirect_function (*btp->function);
|
|
|
2668 if (SUBRP (fun))
|
|
|
2669 return Qnil;
|
|
|
2670 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2671 Return t if that function was called interactively. */
|
|
|
2672 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2673 return Qt;
|
|
|
2674 return Qnil;
|
|
|
2675 }
|
|
|
2676
|
|
|
2677
|
|
|
2678 /**********************************************************************/
|
|
|
2679 /* Autoloading */
|
|
|
2680 /**********************************************************************/
|
|
|
2681
|
|
20
|
2682 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2683 Define FUNCTION to autoload from FILE.
|
|
|
2684 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2685 Third arg DOCSTRING is documentation for the function.
|
|
|
2686 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2687 Fifth arg TYPE indicates the type of the object:
|
|
|
2688 nil or omitted says FUNCTION is a function,
|
|
|
2689 `keymap' says FUNCTION is really a keymap, and
|
|
|
2690 `macro' or t says FUNCTION is really a macro.
|
|
|
2691 Third through fifth args give info about the real definition.
|
|
|
2692 They default to nil.
|
|
|
2693 If FUNCTION is already defined other than as an autoload,
|
|
|
2694 this does nothing and returns nil.
|
|
20
|
2695 */
|
|
|
2696 (function, file, docstring, interactive, type))
|
|
0
|
2697 {
|
|
|
2698 /* This function can GC */
|
|
|
2699 CHECK_SYMBOL (function);
|
|
|
2700 CHECK_STRING (file);
|
|
|
2701
|
|
|
2702 /* If function is defined and not as an autoload, don't override */
|
|
|
2703 if (!UNBOUNDP (XSYMBOL (function)->function)
|
|
|
2704 && !(CONSP (XSYMBOL (function)->function)
|
|
|
2705 && EQ (XCAR (XSYMBOL (function)->function), Qautoload)))
|
|
|
2706 return Qnil;
|
|
|
2707
|
|
|
2708 if (purify_flag)
|
|
|
2709 {
|
|
|
2710 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2711 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2712 }
|
|
|
2713
|
|
185
|
2714 return Ffset (function,
|
|
0
|
2715 Fpurecopy (Fcons (Qautoload, list4 (file,
|
|
|
2716 docstring,
|
|
|
2717 interactive,
|
|
|
2718 type))));
|
|
|
2719 }
|
|
|
2720
|
|
|
2721 Lisp_Object
|
|
|
2722 un_autoload (Lisp_Object oldqueue)
|
|
|
2723 {
|
|
|
2724 /* This function can GC */
|
|
|
2725 REGISTER Lisp_Object queue, first, second;
|
|
|
2726
|
|
|
2727 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2728 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2729 queue = Vautoload_queue;
|
|
|
2730 Vautoload_queue = oldqueue;
|
|
|
2731 while (CONSP (queue))
|
|
|
2732 {
|
|
|
2733 first = Fcar (queue);
|
|
|
2734 second = Fcdr (first);
|
|
|
2735 first = Fcar (first);
|
|
|
2736 if (NILP (second))
|
|
|
2737 Vfeatures = first;
|
|
|
2738 else
|
|
|
2739 Ffset (first, second);
|
|
|
2740 queue = Fcdr (queue);
|
|
|
2741 }
|
|
|
2742 return Qnil;
|
|
|
2743 }
|
|
|
2744
|
|
|
2745 void
|
|
185
|
2746 do_autoload (Lisp_Object fundef,
|
|
0
|
2747 Lisp_Object funname)
|
|
|
2748 {
|
|
|
2749 /* This function can GC */
|
|
|
2750 int speccount = specpdl_depth_counter;
|
|
|
2751 Lisp_Object fun = funname;
|
|
|
2752 struct gcpro gcpro1, gcpro2;
|
|
|
2753
|
|
|
2754 CHECK_SYMBOL (funname);
|
|
|
2755 GCPRO2 (fun, funname);
|
|
|
2756
|
|
|
2757 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2758 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2759 Vautoload_queue = Qt;
|
|
|
2760 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil,
|
|
|
2761 Qnil);
|
|
|
2762
|
|
|
2763 {
|
|
|
2764 Lisp_Object queue = Vautoload_queue;
|
|
|
2765
|
|
|
2766 /* Save the old autoloads, in case we ever do an unload. */
|
|
|
2767 queue = Vautoload_queue;
|
|
|
2768 while (CONSP (queue))
|
|
|
2769 {
|
|
|
2770 Lisp_Object first = Fcar (queue);
|
|
|
2771 Lisp_Object second = Fcdr (first);
|
|
|
2772
|
|
|
2773 first = Fcar (first);
|
|
|
2774
|
|
|
2775 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2776 may be an atom if the autoload entry was generated by a defalias
|
|
|
2777 or fset. */
|
|
|
2778 if (CONSP (second))
|
|
|
2779 Fput (first, Qautoload, (Fcdr (second)));
|
|
|
2780
|
|
|
2781 queue = Fcdr (queue);
|
|
|
2782 }
|
|
|
2783 }
|
|
|
2784
|
|
|
2785 /* Once loading finishes, don't undo it. */
|
|
|
2786 Vautoload_queue = Qt;
|
|
|
2787 unbind_to (speccount, Qnil);
|
|
|
2788
|
|
|
2789 fun = indirect_function (fun, 0);
|
|
|
2790
|
|
|
2791 #if 0 /* FSFmacs */
|
|
|
2792 if (!NILP (Fequal (fun, fundef)))
|
|
|
2793 #else
|
|
|
2794 if (UNBOUNDP (fun)
|
|
|
2795 || (CONSP (fun)
|
|
|
2796 && EQ (XCAR (fun), Qautoload)))
|
|
|
2797 #endif
|
|
|
2798 error ("Autoloading failed to define function %s",
|
|
|
2799 string_data (XSYMBOL (funname)->name));
|
|
|
2800 UNGCPRO;
|
|
|
2801 }
|
|
|
2802
|
|
|
2803
|
|
|
2804 /**********************************************************************/
|
|
|
2805 /* eval, funcall, apply */
|
|
|
2806 /**********************************************************************/
|
|
|
2807
|
|
185
|
2808 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
0
|
2809 int nargs, Lisp_Object args[]);
|
|
185
|
2810 static Lisp_Object apply_lambda (Lisp_Object fun,
|
|
0
|
2811 int nargs, Lisp_Object args);
|
|
|
2812 static int in_warnings;
|
|
|
2813
|
|
|
2814 static Lisp_Object
|
|
|
2815 in_warnings_restore (Lisp_Object minimus)
|
|
|
2816 {
|
|
|
2817 in_warnings = 0;
|
|
|
2818 return Qnil;
|
|
|
2819 }
|
|
|
2820
|
|
272
|
2821 #define AV_0(av)
|
|
|
2822 #define AV_1(av) av[0]
|
|
|
2823 #define AV_2(av) AV_1(av), av[1]
|
|
|
2824 #define AV_3(av) AV_2(av), av[2]
|
|
|
2825 #define AV_4(av) AV_3(av), av[3]
|
|
|
2826 #define AV_5(av) AV_4(av), av[4]
|
|
|
2827 #define AV_6(av) AV_5(av), av[5]
|
|
|
2828 #define AV_7(av) AV_6(av), av[6]
|
|
|
2829 #define AV_8(av) AV_7(av), av[7]
|
|
|
2830
|
|
|
2831 #define PRIMITIVE_FUNCALL(fn, av, ac) \
|
|
|
2832 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
|
|
|
2833
|
|
|
2834 /* If subr's take more than 8 arguments, more cases need to be added
|
|
|
2835 to this switch. (But don't do it - if you really need a SUBR with
|
|
|
2836 more than 8 arguments, use max_args == MANY.
|
|
|
2837 See the DEFUN macro in lisp.h) */
|
|
|
2838 #define inline_funcall_fn(rv, fn, av, ac) do { \
|
|
|
2839 switch (ac) { \
|
|
|
2840 case 0: rv = PRIMITIVE_FUNCALL(fn, av, 0); break; \
|
|
|
2841 case 1: rv = PRIMITIVE_FUNCALL(fn, av, 1); break; \
|
|
|
2842 case 2: rv = PRIMITIVE_FUNCALL(fn, av, 2); break; \
|
|
|
2843 case 3: rv = PRIMITIVE_FUNCALL(fn, av, 3); break; \
|
|
|
2844 case 4: rv = PRIMITIVE_FUNCALL(fn, av, 4); break; \
|
|
|
2845 case 5: rv = PRIMITIVE_FUNCALL(fn, av, 5); break; \
|
|
|
2846 case 6: rv = PRIMITIVE_FUNCALL(fn, av, 6); break; \
|
|
|
2847 case 7: rv = PRIMITIVE_FUNCALL(fn, av, 7); break; \
|
|
|
2848 case 8: rv = PRIMITIVE_FUNCALL(fn, av, 8); break; \
|
|
|
2849 default: abort(); rv = Qnil; break; \
|
|
|
2850 } \
|
|
|
2851 } while (0)
|
|
|
2852
|
|
|
2853 #define inline_funcall_subr(rv, subr, av) do { \
|
|
|
2854 void (*fn)() = (void (*)()) (subr_function(subr)); \
|
|
|
2855 inline_funcall_fn (rv, fn, av, subr->max_args); \
|
|
|
2856 } while (0)
|
|
|
2857
|
|
|
2858 static Lisp_Object
|
|
|
2859 primitive_funcall (lisp_fn_t fn, int nargs, Lisp_Object args[])
|
|
|
2860 {
|
|
|
2861 Lisp_Object rv;
|
|
|
2862 inline_funcall_fn (rv, fn, args, nargs);
|
|
|
2863 return rv;
|
|
|
2864 }
|
|
0
|
2865
|
|
20
|
2866 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2867 Evaluate FORM and return its value.
|
|
20
|
2868 */
|
|
|
2869 (form))
|
|
0
|
2870 {
|
|
|
2871 /* This function can GC */
|
|
|
2872 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2873 int nargs;
|
|
|
2874 struct backtrace backtrace;
|
|
|
2875
|
|
|
2876 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2877 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2878 {
|
|
|
2879 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
272
|
2880 int speccount = specpdl_depth_counter;
|
|
0
|
2881 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2882
|
|
|
2883 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2884 in_warnings = 1;
|
|
|
2885 this_warning_cons = Vpending_warnings;
|
|
|
2886 this_warning = XCAR (this_warning_cons);
|
|
|
2887 /* in case an error occurs in the warn function, at least
|
|
|
2888 it won't happen infinitely */
|
|
|
2889 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2890 free_cons (XCONS (this_warning_cons));
|
|
|
2891 class = XCAR (this_warning);
|
|
|
2892 level = XCAR (XCDR (this_warning));
|
|
|
2893 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2894 free_list (this_warning);
|
|
185
|
2895
|
|
0
|
2896 if (NILP (Vpending_warnings))
|
|
|
2897 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2898 but safer */
|
|
|
2899
|
|
|
2900 GCPRO4 (form, class, level, messij);
|
|
|
2901 if (!STRINGP (messij))
|
|
|
2902 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2903 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2904 UNGCPRO;
|
|
|
2905 unbind_to (speccount, Qnil);
|
|
|
2906 }
|
|
|
2907
|
|
272
|
2908 if (SYMBOLP (form))
|
|
|
2909 return Fsymbol_value (form);
|
|
|
2910
|
|
0
|
2911 if (!CONSP (form))
|
|
272
|
2912 return form;
|
|
0
|
2913
|
|
|
2914 QUIT;
|
|
|
2915 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2916 {
|
|
|
2917 struct gcpro gcpro1;
|
|
|
2918 GCPRO1 (form);
|
|
|
2919 garbage_collect_1 ();
|
|
|
2920 UNGCPRO;
|
|
|
2921 }
|
|
|
2922
|
|
|
2923 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2924 {
|
|
|
2925 if (max_lisp_eval_depth < 100)
|
|
|
2926 max_lisp_eval_depth = 100;
|
|
|
2927 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2928 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2929 }
|
|
|
2930
|
|
195
|
2931 /*
|
|
|
2932 * At this point we know that `form' is a Lisp_Cons so we can safely
|
|
|
2933 * use XCAR and XCDR.
|
|
|
2934 */
|
|
|
2935 original_fun = XCAR (form);
|
|
|
2936 original_args = XCDR (form);
|
|
|
2937
|
|
|
2938 /*
|
|
|
2939 * Formerly we used a call to Flength here, but that is slow and
|
|
|
2940 * wasteful due to type checking, stack push/pop and initialization.
|
|
|
2941 * We know we're dealing with a cons, so open code it for speed.
|
|
|
2942 *
|
|
|
2943 * We call QUIT in the loop so that a circular arg list won't lock
|
|
|
2944 * up the editor.
|
|
|
2945 */
|
|
|
2946 for (nargs = 0, val = original_args ; CONSP (val) ; val = XCDR (val))
|
|
|
2947 {
|
|
|
2948 nargs++;
|
|
|
2949 QUIT;
|
|
|
2950 }
|
|
|
2951 if (! NILP (val))
|
|
|
2952 signal_simple_error ("Argument list must be nil-terminated",
|
|
|
2953 original_args);
|
|
0
|
2954
|
|
|
2955 #ifdef EMACS_BTL
|
|
|
2956 backtrace.id_number = 0;
|
|
|
2957 #endif
|
|
|
2958 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
2959 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2960 backtrace.args = &original_args;
|
|
|
2961 backtrace.nargs = UNEVALLED;
|
|
|
2962 backtrace.evalargs = 1;
|
|
|
2963 backtrace.debug_on_exit = 0;
|
|
116
|
2964 PUSH_BACKTRACE (backtrace);
|
|
0
|
2965
|
|
|
2966 if (debug_on_next_call)
|
|
|
2967 do_debug_on_call (Qt);
|
|
|
2968
|
|
245
|
2969 if (profiling_active)
|
|
|
2970 profile_increase_call_count (original_fun);
|
|
|
2971
|
|
0
|
2972 /* At this point, only original_fun and original_args
|
|
|
2973 have values that will be used below */
|
|
|
2974 retry:
|
|
|
2975 fun = indirect_function (original_fun, 1);
|
|
|
2976
|
|
|
2977 if (SUBRP (fun))
|
|
|
2978 {
|
|
|
2979 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
2980 int max_args = subr->max_args;
|
|
|
2981 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
2982 Lisp_Object args_left;
|
|
|
2983 REGISTER int i;
|
|
|
2984
|
|
|
2985 args_left = original_args;
|
|
|
2986
|
|
|
2987 if (nargs < subr->min_args
|
|
|
2988 || (max_args >= 0 && max_args < nargs))
|
|
|
2989 {
|
|
185
|
2990 return Fsignal (Qwrong_number_of_arguments,
|
|
0
|
2991 list2 (fun, make_int (nargs)));
|
|
|
2992 }
|
|
|
2993
|
|
|
2994 if (max_args == UNEVALLED)
|
|
|
2995 {
|
|
|
2996 backtrace.evalargs = 0;
|
|
272
|
2997 val = ((Lisp_Object (*) (Lisp_Object)) (subr_function (subr))) (args_left);
|
|
0
|
2998 }
|
|
|
2999
|
|
|
3000 else if (max_args == MANY)
|
|
|
3001 {
|
|
|
3002 /* Pass a vector of evaluated arguments */
|
|
|
3003 Lisp_Object *vals;
|
|
|
3004 REGISTER int argnum;
|
|
|
3005 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3006
|
|
185
|
3007 vals = alloca_array (Lisp_Object, nargs);
|
|
0
|
3008
|
|
|
3009 GCPRO3 (args_left, fun, vals[0]);
|
|
|
3010 gcpro3.nvars = 0;
|
|
|
3011
|
|
|
3012 argnum = 0;
|
|
195
|
3013 while (CONSP (args_left))
|
|
0
|
3014 {
|
|
195
|
3015 vals[argnum++] = Feval (XCAR (args_left));
|
|
|
3016 args_left = XCDR (args_left);
|
|
0
|
3017 gcpro3.nvars = argnum;
|
|
|
3018 }
|
|
|
3019
|
|
|
3020 backtrace.args = vals;
|
|
|
3021 backtrace.nargs = nargs;
|
|
|
3022
|
|
74
|
3023 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3024 (nargs, vals);
|
|
0
|
3025
|
|
|
3026 /* Have to duplicate this code because if the
|
|
|
3027 * debugger is called it must be in a scope in
|
|
|
3028 * which the `alloca'-ed data in vals is still valid.
|
|
|
3029 * (And GC-protected.)
|
|
|
3030 */
|
|
|
3031 lisp_eval_depth--;
|
|
|
3032 if (backtrace.debug_on_exit)
|
|
|
3033 val = do_debug_on_exit (val);
|
|
116
|
3034 POP_BACKTRACE (backtrace);
|
|
0
|
3035 UNGCPRO;
|
|
173
|
3036 return val;
|
|
0
|
3037 }
|
|
|
3038
|
|
|
3039 else
|
|
|
3040 {
|
|
|
3041 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3042
|
|
|
3043 GCPRO3 (args_left, fun, fun);
|
|
|
3044 gcpro3.var = argvals;
|
|
|
3045 gcpro3.nvars = 0;
|
|
|
3046
|
|
195
|
3047 for (i = 0; i < nargs; args_left = XCDR (args_left))
|
|
0
|
3048 {
|
|
195
|
3049 argvals[i] = Feval (XCAR (args_left));
|
|
0
|
3050 gcpro3.nvars = ++i;
|
|
|
3051 }
|
|
185
|
3052
|
|
0
|
3053 UNGCPRO;
|
|
185
|
3054
|
|
195
|
3055 /* i == nargs at this point */
|
|
|
3056 for (; i < max_args; i++)
|
|
0
|
3057 argvals[i] = Qnil;
|
|
|
3058
|
|
|
3059 backtrace.args = argvals;
|
|
|
3060 backtrace.nargs = nargs;
|
|
|
3061
|
|
195
|
3062 /* val = funcall_subr (subr, argvals); */
|
|
272
|
3063 inline_funcall_subr (val, subr, argvals);
|
|
0
|
3064 }
|
|
|
3065 }
|
|
|
3066 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3067 val = apply_lambda (fun, nargs, original_args);
|
|
|
3068 else
|
|
|
3069 {
|
|
|
3070 Lisp_Object funcar;
|
|
|
3071
|
|
|
3072 if (!CONSP (fun))
|
|
|
3073 goto invalid_function;
|
|
195
|
3074 funcar = XCAR (fun);
|
|
0
|
3075 if (!SYMBOLP (funcar))
|
|
|
3076 goto invalid_function;
|
|
|
3077 if (EQ (funcar, Qautoload))
|
|
|
3078 {
|
|
|
3079 do_autoload (fun, original_fun);
|
|
|
3080 goto retry;
|
|
|
3081 }
|
|
|
3082 if (EQ (funcar, Qmacro))
|
|
195
|
3083 val = Feval (apply1 (XCDR (fun), original_args));
|
|
0
|
3084 else if (EQ (funcar, Qlambda))
|
|
|
3085 val = apply_lambda (fun, nargs, original_args);
|
|
|
3086 else
|
|
|
3087 {
|
|
|
3088 invalid_function:
|
|
|
3089 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3090 }
|
|
|
3091 }
|
|
|
3092
|
|
|
3093 lisp_eval_depth--;
|
|
|
3094 if (backtrace.debug_on_exit)
|
|
|
3095 val = do_debug_on_exit (val);
|
|
116
|
3096 POP_BACKTRACE (backtrace);
|
|
173
|
3097 return val;
|
|
0
|
3098 }
|
|
|
3099
|
|
|
3100
|
|
|
3101 Lisp_Object
|
|
|
3102 funcall_recording_as (Lisp_Object recorded_as, int nargs,
|
|
|
3103 Lisp_Object *args)
|
|
|
3104 {
|
|
|
3105 /* This function can GC */
|
|
|
3106 Lisp_Object fun;
|
|
|
3107 Lisp_Object val;
|
|
|
3108 struct backtrace backtrace;
|
|
|
3109 REGISTER int i;
|
|
|
3110
|
|
|
3111 QUIT;
|
|
|
3112 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3113 /* Callers should gcpro lexpr args */
|
|
|
3114 garbage_collect_1 ();
|
|
|
3115
|
|
|
3116 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3117 {
|
|
|
3118 if (max_lisp_eval_depth < 100)
|
|
|
3119 max_lisp_eval_depth = 100;
|
|
|
3120 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3121 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3122 }
|
|
|
3123
|
|
|
3124 /* Count number of arguments to function */
|
|
|
3125 nargs = nargs - 1;
|
|
|
3126
|
|
|
3127 #ifdef EMACS_BTL
|
|
|
3128 backtrace.id_number = 0;
|
|
|
3129 #endif
|
|
|
3130 backtrace.pdlcount = specpdl_depth_counter;
|
|
|
3131 backtrace.function = &args[0];
|
|
|
3132 backtrace.args = &args[1];
|
|
|
3133 backtrace.nargs = nargs;
|
|
|
3134 backtrace.evalargs = 0;
|
|
|
3135 backtrace.debug_on_exit = 0;
|
|
116
|
3136 PUSH_BACKTRACE (backtrace);
|
|
0
|
3137
|
|
|
3138 if (debug_on_next_call)
|
|
|
3139 do_debug_on_call (Qlambda);
|
|
|
3140
|
|
|
3141 retry:
|
|
|
3142
|
|
|
3143 fun = args[0];
|
|
|
3144
|
|
|
3145 #ifdef EMACS_BTL
|
|
|
3146 {
|
|
|
3147 extern int emacs_btl_elisp_only_p;
|
|
|
3148 extern int btl_symbol_id_number ();
|
|
|
3149 if (emacs_btl_elisp_only_p)
|
|
|
3150 backtrace.id_number = btl_symbol_id_number (fun);
|
|
|
3151 }
|
|
|
3152 #endif
|
|
|
3153
|
|
241
|
3154 /* It might be useful to place this *after* all the checks. */
|
|
|
3155 if (profiling_active)
|
|
|
3156 profile_increase_call_count (fun);
|
|
|
3157
|
|
0
|
3158 if (SYMBOLP (fun))
|
|
|
3159 fun = indirect_function (fun, 1);
|
|
|
3160
|
|
|
3161 if (SUBRP (fun))
|
|
|
3162 {
|
|
|
3163 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3164 int max_args = subr->max_args;
|
|
|
3165
|
|
|
3166 if (max_args == UNEVALLED)
|
|
|
3167 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3168
|
|
|
3169 if (nargs < subr->min_args
|
|
|
3170 || (max_args >= 0 && max_args < nargs))
|
|
|
3171 {
|
|
185
|
3172 return Fsignal (Qwrong_number_of_arguments,
|
|
0
|
3173 list2 (fun, make_int (nargs)));
|
|
|
3174 }
|
|
|
3175
|
|
|
3176 if (max_args == MANY)
|
|
|
3177 {
|
|
74
|
3178 val = ((Lisp_Object (*) (int, Lisp_Object *)) (subr_function (subr)))
|
|
|
3179 (nargs, args + 1);
|
|
0
|
3180 }
|
|
|
3181
|
|
|
3182 else if (max_args > nargs)
|
|
|
3183 {
|
|
|
3184 Lisp_Object argvals[SUBR_MAX_ARGS];
|
|
|
3185
|
|
|
3186 /* Default optionals to nil */
|
|
|
3187 for (i = 0; i < nargs; i++)
|
|
|
3188 argvals[i] = args[i + 1];
|
|
|
3189 for (i = nargs; i < max_args; i++)
|
|
|
3190 argvals[i] = Qnil;
|
|
|
3191
|
|
195
|
3192 /* val = funcall_subr (subr, argvals); */
|
|
272
|
3193 inline_funcall_subr (val, subr, argvals);
|
|
0
|
3194 }
|
|
|
3195 else
|
|
195
|
3196 /* val = funcall_subr (subr, args + 1); */
|
|
272
|
3197 inline_funcall_subr (val, subr, (&args[1]));
|
|
0
|
3198 }
|
|
|
3199 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3200 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3201 else if (!CONSP (fun))
|
|
|
3202 {
|
|
|
3203 invalid_function:
|
|
|
3204 return Fsignal (Qinvalid_function, list1 (fun));
|
|
|
3205 }
|
|
|
3206 else
|
|
|
3207 {
|
|
195
|
3208 /* `fun' is a Lisp_Cons so XCAR is safe */
|
|
|
3209 Lisp_Object funcar = XCAR (fun);
|
|
0
|
3210
|
|
|
3211 if (!SYMBOLP (funcar))
|
|
|
3212 goto invalid_function;
|
|
|
3213 if (EQ (funcar, Qlambda))
|
|
|
3214 val = funcall_lambda (fun, nargs, args + 1);
|
|
|
3215 else if (EQ (funcar, Qautoload))
|
|
|
3216 {
|
|
|
3217 do_autoload (fun, args[0]);
|
|
|
3218 goto retry;
|
|
|
3219 }
|
|
|
3220 else
|
|
|
3221 {
|
|
|
3222 goto invalid_function;
|
|
|
3223 }
|
|
|
3224 }
|
|
|
3225 lisp_eval_depth--;
|
|
|
3226 if (backtrace.debug_on_exit)
|
|
|
3227 val = do_debug_on_exit (val);
|
|
116
|
3228 POP_BACKTRACE (backtrace);
|
|
0
|
3229 return val;
|
|
|
3230 }
|
|
|
3231
|
|
20
|
3232 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
0
|
3233 Call first argument as a function, passing remaining arguments to it.
|
|
|
3234 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
20
|
3235 */
|
|
|
3236 (int nargs, Lisp_Object *args))
|
|
0
|
3237 {
|
|
|
3238 return funcall_recording_as (args[0], nargs, args);
|
|
|
3239 }
|
|
|
3240
|
|
20
|
3241 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
0
|
3242 Return the number of arguments a function may be called with. The
|
|
|
3243 function may be any form that can be passed to `funcall', any special
|
|
|
3244 form, or any macro.
|
|
20
|
3245 */
|
|
|
3246 (function))
|
|
0
|
3247 {
|
|
|
3248 Lisp_Object orig_function = function;
|
|
|
3249 Lisp_Object arglist;
|
|
|
3250 int argcount;
|
|
|
3251
|
|
|
3252 retry:
|
|
|
3253
|
|
|
3254 if (SYMBOLP (function))
|
|
|
3255 function = indirect_function (function, 1);
|
|
|
3256
|
|
|
3257 if (SUBRP (function))
|
|
|
3258 return Fsubr_min_args (function);
|
|
|
3259 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3260 {
|
|
|
3261 invalid_function:
|
|
|
3262 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3263 }
|
|
|
3264
|
|
|
3265 if (CONSP (function))
|
|
|
3266 {
|
|
272
|
3267 Lisp_Object funcar = XCAR (function);
|
|
0
|
3268
|
|
|
3269 if (!SYMBOLP (funcar))
|
|
|
3270 goto invalid_function;
|
|
|
3271 if (EQ (funcar, Qmacro))
|
|
|
3272 {
|
|
272
|
3273 function = XCDR (function);
|
|
0
|
3274 goto retry;
|
|
|
3275 }
|
|
|
3276 if (EQ (funcar, Qautoload))
|
|
|
3277 {
|
|
|
3278 do_autoload (function, orig_function);
|
|
|
3279 goto retry;
|
|
|
3280 }
|
|
|
3281 if (EQ (funcar, Qlambda))
|
|
272
|
3282 arglist = Fcar (XCDR (function));
|
|
0
|
3283 else
|
|
|
3284 goto invalid_function;
|
|
|
3285 }
|
|
|
3286 else
|
|
|
3287 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3288
|
|
|
3289 argcount = 0;
|
|
|
3290 while (!NILP (arglist))
|
|
|
3291 {
|
|
|
3292 QUIT;
|
|
|
3293 if (EQ (Fcar (arglist), Qand_optional)
|
|
|
3294 || EQ (Fcar (arglist), Qand_rest))
|
|
|
3295 break;
|
|
|
3296 argcount++;
|
|
|
3297 arglist = Fcdr (arglist);
|
|
|
3298 }
|
|
|
3299
|
|
|
3300 return make_int (argcount);
|
|
|
3301 }
|
|
|
3302
|
|
20
|
3303 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
0
|
3304 Return the number of arguments a function may be called with. If the
|
|
|
3305 function takes an arbitrary number of arguments or is a built-in
|
|
|
3306 special form, nil is returned. The function may be any form that can
|
|
|
3307 be passed to `funcall', any special form, or any macro.
|
|
20
|
3308 */
|
|
|
3309 (function))
|
|
0
|
3310 {
|
|
|
3311 Lisp_Object orig_function = function;
|
|
|
3312 Lisp_Object arglist;
|
|
|
3313 int argcount;
|
|
|
3314
|
|
|
3315 retry:
|
|
|
3316
|
|
|
3317 if (SYMBOLP (function))
|
|
|
3318 function = indirect_function (function, 1);
|
|
|
3319
|
|
|
3320 if (SUBRP (function))
|
|
|
3321 return Fsubr_max_args (function);
|
|
|
3322 else if (!COMPILED_FUNCTIONP (function) && !CONSP (function))
|
|
|
3323 {
|
|
|
3324 invalid_function:
|
|
|
3325 return Fsignal (Qinvalid_function, list1 (function));
|
|
|
3326 }
|
|
|
3327
|
|
|
3328 if (CONSP (function))
|
|
|
3329 {
|
|
272
|
3330 Lisp_Object funcar = XCAR (function);
|
|
0
|
3331
|
|
|
3332 if (!SYMBOLP (funcar))
|
|
|
3333 goto invalid_function;
|
|
|
3334 if (EQ (funcar, Qmacro))
|
|
|
3335 {
|
|
272
|
3336 function = XCDR (function);
|
|
0
|
3337 goto retry;
|
|
|
3338 }
|
|
|
3339 if (EQ (funcar, Qautoload))
|
|
|
3340 {
|
|
|
3341 do_autoload (function, orig_function);
|
|
|
3342 goto retry;
|
|
|
3343 }
|
|
|
3344 if (EQ (funcar, Qlambda))
|
|
272
|
3345 arglist = Fcar (XCDR (function));
|
|
0
|
3346 else
|
|
|
3347 goto invalid_function;
|
|
|
3348 }
|
|
|
3349 else
|
|
|
3350 arglist = XCOMPILED_FUNCTION (function)->arglist;
|
|
|
3351
|
|
|
3352 argcount = 0;
|
|
|
3353 while (!NILP (arglist))
|
|
|
3354 {
|
|
|
3355 QUIT;
|
|
|
3356 if (EQ (Fcar (arglist), Qand_optional))
|
|
|
3357 {
|
|
|
3358 arglist = Fcdr (arglist);
|
|
|
3359 continue;
|
|
|
3360 }
|
|
|
3361 if (EQ (Fcar (arglist), Qand_rest))
|
|
|
3362 return Qnil;
|
|
|
3363 argcount++;
|
|
|
3364 arglist = Fcdr (arglist);
|
|
|
3365 }
|
|
|
3366
|
|
|
3367 return make_int (argcount);
|
|
|
3368 }
|
|
|
3369
|
|
|
3370
|
|
20
|
3371 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
0
|
3372 Call FUNCTION with our remaining args, using our last arg as list of args.
|
|
|
3373 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3374 */
|
|
|
3375 (int nargs, Lisp_Object *args))
|
|
0
|
3376 {
|
|
|
3377 /* This function can GC */
|
|
|
3378 Lisp_Object fun = args[0];
|
|
195
|
3379 Lisp_Object spread_arg = args [nargs - 1], p;
|
|
0
|
3380 int numargs;
|
|
|
3381 int funcall_nargs;
|
|
|
3382
|
|
|
3383 CHECK_LIST (spread_arg);
|
|
185
|
3384
|
|
195
|
3385 /*
|
|
|
3386 * Formerly we used a call to Flength here, but that is slow and
|
|
|
3387 * wasteful due to type checking, stack push/pop and initialization.
|
|
|
3388 * We know we're dealing with a cons, so open code it for speed.
|
|
|
3389 *
|
|
|
3390 * We call QUIT in the loop so that a circular arg list won't lock
|
|
|
3391 * up the editor.
|
|
|
3392 */
|
|
|
3393 for (numargs = 0, p = spread_arg ; CONSP (p) ; p = XCDR (p))
|
|
|
3394 {
|
|
|
3395 numargs++;
|
|
|
3396 QUIT;
|
|
|
3397 }
|
|
|
3398 if (! NILP (p))
|
|
|
3399 signal_simple_error ("Argument list must be nil-terminated", spread_arg);
|
|
0
|
3400
|
|
|
3401 if (numargs == 0)
|
|
|
3402 /* (apply foo 0 1 '()) */
|
|
|
3403 return Ffuncall (nargs - 1, args);
|
|
|
3404 else if (numargs == 1)
|
|
|
3405 {
|
|
|
3406 /* (apply foo 0 1 '(2)) */
|
|
|
3407 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3408 return Ffuncall (nargs, args);
|
|
|
3409 }
|
|
|
3410
|
|
|
3411 /* -1 for function, -1 for spread arg */
|
|
|
3412 numargs = nargs - 2 + numargs;
|
|
|
3413 /* +1 for function */
|
|
|
3414 funcall_nargs = 1 + numargs;
|
|
|
3415
|
|
|
3416 if (SYMBOLP (fun))
|
|
|
3417 fun = indirect_function (fun, 0);
|
|
|
3418 if (UNBOUNDP (fun))
|
|
|
3419 {
|
|
|
3420 /* Let funcall get the error */
|
|
|
3421 fun = args[0];
|
|
|
3422 }
|
|
|
3423 else if (SUBRP (fun))
|
|
|
3424 {
|
|
|
3425 struct Lisp_Subr *subr = XSUBR (fun);
|
|
|
3426 int max_args = subr->max_args;
|
|
|
3427
|
|
|
3428 if (numargs < subr->min_args
|
|
|
3429 || (max_args >= 0 && max_args < numargs))
|
|
|
3430 {
|
|
|
3431 /* Let funcall get the error */
|
|
|
3432 }
|
|
|
3433 else if (max_args > numargs)
|
|
|
3434 {
|
|
|
3435 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3436 by explicitly supplying nil's for optional values */
|
|
|
3437 funcall_nargs += (max_args - numargs);
|
|
|
3438 }
|
|
|
3439 }
|
|
|
3440 {
|
|
|
3441 REGISTER int i;
|
|
185
|
3442 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
0
|
3443 struct gcpro gcpro1;
|
|
|
3444
|
|
|
3445 GCPRO1 (*funcall_args);
|
|
|
3446 gcpro1.nvars = funcall_nargs;
|
|
|
3447
|
|
|
3448 /* Copy in the unspread args */
|
|
|
3449 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3450 /* Spread the last arg we got. Its first element goes in
|
|
|
3451 the slot that it used to occupy, hence this value of I. */
|
|
185
|
3452 for (i = nargs - 1;
|
|
0
|
3453 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3454 i++, spread_arg = XCDR (spread_arg))
|
|
|
3455 {
|
|
|
3456 funcall_args [i] = XCAR (spread_arg);
|
|
|
3457 }
|
|
|
3458 /* Supply nil for optional args (to subrs) */
|
|
|
3459 for (; i < funcall_nargs; i++)
|
|
|
3460 funcall_args[i] = Qnil;
|
|
|
3461
|
|
|
3462
|
|
|
3463 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3464 }
|
|
|
3465 }
|
|
|
3466
|
|
|
3467
|
|
|
3468 /* FSFmacs has an extra arg EVAL_FLAG. If false, some of
|
|
|
3469 the statements below are not done. But it's always true
|
|
|
3470 in all the calls to apply_lambda(). */
|
|
|
3471
|
|
|
3472 static Lisp_Object
|
|
|
3473 apply_lambda (Lisp_Object fun, int numargs, Lisp_Object unevalled_args)
|
|
|
3474 {
|
|
|
3475 /* This function can GC */
|
|
|
3476 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3477 REGISTER int i;
|
|
|
3478 REGISTER Lisp_Object tem;
|
|
185
|
3479 REGISTER Lisp_Object *arg_vector = alloca_array (Lisp_Object, numargs);
|
|
0
|
3480
|
|
|
3481 GCPRO3 (*arg_vector, unevalled_args, fun);
|
|
|
3482 gcpro1.nvars = 0;
|
|
|
3483
|
|
|
3484 for (i = 0; i < numargs;)
|
|
|
3485 {
|
|
195
|
3486 /*
|
|
|
3487 * unevalled_args is always a normal list, or Feval would have
|
|
|
3488 * rejected it, so use XCAR and XCDR.
|
|
|
3489 */
|
|
|
3490 tem = XCAR (unevalled_args), unevalled_args = XCDR (unevalled_args);
|
|
0
|
3491 tem = Feval (tem);
|
|
|
3492 arg_vector[i++] = tem;
|
|
|
3493 gcpro1.nvars = i;
|
|
|
3494 }
|
|
|
3495
|
|
|
3496 UNGCPRO;
|
|
|
3497
|
|
|
3498 backtrace_list->args = arg_vector;
|
|
|
3499 backtrace_list->nargs = i;
|
|
|
3500 backtrace_list->evalargs = 0;
|
|
|
3501 tem = funcall_lambda (fun, numargs, arg_vector);
|
|
|
3502
|
|
|
3503 /* Do the debug-on-exit now, while arg_vector still exists. */
|
|
|
3504 if (backtrace_list->debug_on_exit)
|
|
|
3505 tem = do_debug_on_exit (tem);
|
|
|
3506 /* Don't do it again when we return to eval. */
|
|
|
3507 backtrace_list->debug_on_exit = 0;
|
|
173
|
3508 return tem;
|
|
0
|
3509 }
|
|
|
3510
|
|
272
|
3511 DEFUN ("fetch-bytecode", Ffetch_bytecode, 1, 1, 0, /*
|
|
|
3512 If byte-compiled OBJECT is lazy-loaded, fetch it now.
|
|
|
3513 */
|
|
|
3514 (object))
|
|
|
3515 {
|
|
|
3516 if (COMPILED_FUNCTIONP (object)
|
|
|
3517 && CONSP (XCOMPILED_FUNCTION (object)->bytecodes))
|
|
|
3518 {
|
|
|
3519 Lisp_Object tem =
|
|
|
3520 read_doc_string (XCOMPILED_FUNCTION (object)->bytecodes);
|
|
|
3521 if (!CONSP (tem))
|
|
|
3522 signal_simple_error ("invalid lazy-loaded byte code", tem);
|
|
|
3523 /* v18 or v19 bytecode file. Need to Ebolify. */
|
|
|
3524 if (XCOMPILED_FUNCTION (object)->flags.ebolified
|
|
|
3525 && VECTORP (XCDR (tem)))
|
|
|
3526 ebolify_bytecode_constants (XCDR (tem));
|
|
|
3527 /* VERY IMPORTANT to purecopy here!!!!!
|
|
|
3528 See load_force_doc_string_unwind. */
|
|
|
3529 XCOMPILED_FUNCTION (object)->bytecodes = Fpurecopy (XCAR (tem));
|
|
|
3530 XCOMPILED_FUNCTION (object)->constants = Fpurecopy (XCDR (tem));
|
|
|
3531 }
|
|
|
3532 return object;
|
|
|
3533 }
|
|
|
3534
|
|
0
|
3535 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
|
|
|
3536 and return the result of evaluation.
|
|
|
3537 FUN must be either a lambda-expression or a compiled-code object. */
|
|
|
3538
|
|
|
3539 static Lisp_Object
|
|
|
3540 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object arg_vector[])
|
|
|
3541 {
|
|
|
3542 /* This function can GC */
|
|
|
3543 Lisp_Object val, tem;
|
|
|
3544 REGISTER Lisp_Object syms_left;
|
|
|
3545 REGISTER Lisp_Object next;
|
|
|
3546 int speccount = specpdl_depth_counter;
|
|
|
3547 REGISTER int i;
|
|
|
3548 int optional = 0, rest = 0;
|
|
|
3549
|
|
|
3550 if (CONSP (fun))
|
|
195
|
3551 syms_left = Fcar (XCDR (fun));
|
|
0
|
3552 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3553 syms_left = XCOMPILED_FUNCTION (fun)->arglist;
|
|
|
3554 else abort ();
|
|
|
3555
|
|
|
3556 i = 0;
|
|
195
|
3557 for (; CONSP (syms_left); syms_left = XCDR (syms_left))
|
|
0
|
3558 {
|
|
|
3559 QUIT;
|
|
195
|
3560 next = XCAR (syms_left);
|
|
0
|
3561 if (!SYMBOLP (next))
|
|
|
3562 signal_error (Qinvalid_function, list1 (fun));
|
|
|
3563 if (EQ (next, Qand_rest))
|
|
|
3564 rest = 1;
|
|
|
3565 else if (EQ (next, Qand_optional))
|
|
|
3566 optional = 1;
|
|
|
3567 else if (rest)
|
|
|
3568 {
|
|
|
3569 specbind (next, Flist (nargs - i, &arg_vector[i]));
|
|
|
3570 i = nargs;
|
|
|
3571 }
|
|
|
3572 else if (i < nargs)
|
|
|
3573 {
|
|
|
3574 tem = arg_vector[i++];
|
|
|
3575 specbind (next, tem);
|
|
|
3576 }
|
|
|
3577 else if (!optional)
|
|
185
|
3578 return Fsignal (Qwrong_number_of_arguments,
|
|
0
|
3579 list2 (fun, make_int (nargs)));
|
|
|
3580 else
|
|
|
3581 specbind (next, Qnil);
|
|
|
3582 }
|
|
|
3583
|
|
|
3584 if (i < nargs)
|
|
185
|
3585 return Fsignal (Qwrong_number_of_arguments,
|
|
0
|
3586 list2 (fun, make_int (nargs)));
|
|
|
3587
|
|
|
3588 if (CONSP (fun))
|
|
195
|
3589 val = Fprogn (Fcdr (XCDR (fun)));
|
|
0
|
3590 else
|
|
|
3591 {
|
|
|
3592 struct Lisp_Compiled_Function *b = XCOMPILED_FUNCTION (fun);
|
|
|
3593 /* If we have not actually read the bytecode string
|
|
|
3594 and constants vector yet, fetch them from the file. */
|
|
|
3595 if (CONSP (b->bytecodes))
|
|
|
3596 Ffetch_bytecode (fun);
|
|
|
3597 val = Fbyte_code (b->bytecodes,
|
|
|
3598 b->constants,
|
|
|
3599 make_int (b->maxdepth));
|
|
|
3600 }
|
|
|
3601 return unbind_to (speccount, val);
|
|
|
3602 }
|
|
|
3603
|
|
|
3604 /**********************************************************************/
|
|
|
3605 /* Run hook variables in various ways. */
|
|
|
3606 /**********************************************************************/
|
|
|
3607
|
|
20
|
3608 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3609 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3610 Each argument should be a symbol, a hook variable.
|
|
|
3611 These symbols are processed in the order specified.
|
|
|
3612 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3613 or a list of functions to be called to run the hook.
|
|
|
3614 If the value is a function, it is called with no arguments.
|
|
|
3615 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3616
|
|
|
3617 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3618 not `make-local-variable'.
|
|
20
|
3619 */
|
|
|
3620 (int nargs, Lisp_Object *args))
|
|
0
|
3621 {
|
|
|
3622 REGISTER int i;
|
|
|
3623
|
|
|
3624 for (i = 0; i < nargs; i++)
|
|
187
|
3625 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
0
|
3626
|
|
|
3627 return Qnil;
|
|
|
3628 }
|
|
185
|
3629
|
|
20
|
3630 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3631 Run HOOK with the specified arguments ARGS.
|
|
|
3632 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3633 value, that value may be a function or a list of functions to be
|
|
|
3634 called to run the hook. If the value is a function, it is called with
|
|
|
3635 the given arguments and its return value is returned. If it is a list
|
|
|
3636 of functions, those functions are called, in order,
|
|
|
3637 with the given arguments ARGS.
|
|
|
3638 It is best not to depend on the value return by `run-hook-with-args',
|
|
|
3639 as that may change.
|
|
|
3640
|
|
|
3641 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3642 not `make-local-variable'.
|
|
20
|
3643 */
|
|
|
3644 (int nargs, Lisp_Object *args))
|
|
0
|
3645 {
|
|
|
3646 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3647 }
|
|
|
3648
|
|
20
|
3649 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3650 Run HOOK with the specified arguments ARGS.
|
|
|
3651 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3652 be a list of functions. We call those functions, one by one,
|
|
|
3653 passing arguments ARGS to each of them, until one of them
|
|
|
3654 returns a non-nil value. Then we return that value.
|
|
|
3655 If all the functions return nil, we return nil.
|
|
|
3656
|
|
|
3657 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3658 not `make-local-variable'.
|
|
20
|
3659 */
|
|
|
3660 (int nargs, Lisp_Object *args))
|
|
0
|
3661 {
|
|
|
3662 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3663 }
|
|
|
3664
|
|
20
|
3665 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3666 Run HOOK with the specified arguments ARGS.
|
|
|
3667 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3668 be a list of functions. We call those functions, one by one,
|
|
|
3669 passing arguments ARGS to each of them, until one of them
|
|
|
3670 returns nil. Then we return nil.
|
|
|
3671 If all the functions return non-nil, we return non-nil.
|
|
|
3672
|
|
|
3673 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3674 not `make-local-variable'.
|
|
20
|
3675 */
|
|
|
3676 (int nargs, Lisp_Object *args))
|
|
0
|
3677 {
|
|
|
3678 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3679 }
|
|
|
3680
|
|
|
3681 /* ARGS[0] should be a hook symbol.
|
|
|
3682 Call each of the functions in the hook value, passing each of them
|
|
|
3683 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3684 COND specifies a condition to test after each call
|
|
|
3685 to decide whether to stop.
|
|
|
3686 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3687 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3688
|
|
|
3689 Lisp_Object
|
|
|
3690 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3691 enum run_hooks_condition cond)
|
|
|
3692 {
|
|
|
3693 Lisp_Object sym, val, ret;
|
|
|
3694 struct gcpro gcpro1, gcpro2;
|
|
|
3695
|
|
|
3696 if (!initialized || preparing_for_armageddon)
|
|
|
3697 /* We need to bail out of here pronto. */
|
|
|
3698 return Qnil;
|
|
|
3699
|
|
|
3700 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3701 will also be true unless something is really hosed. */
|
|
|
3702 assert (!gc_in_progress);
|
|
|
3703
|
|
|
3704 sym = args[0];
|
|
|
3705 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3706 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3707
|
|
|
3708 if (UNBOUNDP (val) || NILP (val))
|
|
|
3709 return ret;
|
|
|
3710 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3711 {
|
|
|
3712 args[0] = val;
|
|
|
3713 return Ffuncall (nargs, args);
|
|
|
3714 }
|
|
|
3715 else
|
|
|
3716 {
|
|
|
3717 GCPRO2 (sym, val);
|
|
|
3718
|
|
|
3719 for (;
|
|
|
3720 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3721 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3722 : !NILP (ret)));
|
|
|
3723 val = XCDR (val))
|
|
|
3724 {
|
|
|
3725 if (EQ (XCAR (val), Qt))
|
|
|
3726 {
|
|
|
3727 /* t indicates this hook has a local binding;
|
|
|
3728 it means to run the global binding too. */
|
|
298
|
3729 Lisp_Object globals = Fdefault_value (sym);
|
|
|
3730
|
|
|
3731 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3732 ! NILP (globals))
|
|
|
3733 {
|
|
|
3734 args[0] = globals;
|
|
|
3735 ret = Ffuncall (nargs, args);
|
|
|
3736 }
|
|
|
3737 else
|
|
0
|
3738 {
|
|
298
|
3739 for (;
|
|
|
3740 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3741 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3742 ? NILP (ret)
|
|
|
3743 : !NILP (ret)));
|
|
|
3744 globals = XCDR (globals))
|
|
|
3745 {
|
|
|
3746 args[0] = XCAR (globals);
|
|
|
3747 /* In a global value, t should not occur. If it does, we
|
|
|
3748 must ignore it to avoid an endless loop. */
|
|
|
3749 if (!EQ (args[0], Qt))
|
|
|
3750 ret = Ffuncall (nargs, args);
|
|
|
3751 }
|
|
0
|
3752 }
|
|
|
3753 }
|
|
|
3754 else
|
|
|
3755 {
|
|
|
3756 args[0] = XCAR (val);
|
|
|
3757 ret = Ffuncall (nargs, args);
|
|
|
3758 }
|
|
|
3759 }
|
|
|
3760
|
|
|
3761 UNGCPRO;
|
|
|
3762 return ret;
|
|
|
3763 }
|
|
|
3764 }
|
|
|
3765
|
|
|
3766 Lisp_Object
|
|
|
3767 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3768 enum run_hooks_condition cond)
|
|
|
3769 {
|
|
|
3770 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3771 }
|
|
|
3772
|
|
|
3773 #if 0
|
|
|
3774
|
|
|
3775 /* From FSF 19.30, not currently used */
|
|
|
3776
|
|
|
3777 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3778 present value of that symbol.
|
|
|
3779 Call each element of FUNLIST,
|
|
|
3780 passing each of them the rest of ARGS.
|
|
|
3781 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3782 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3783
|
|
|
3784 Lisp_Object
|
|
|
3785 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3786 {
|
|
|
3787 Lisp_Object sym;
|
|
|
3788 Lisp_Object val;
|
|
|
3789 struct gcpro gcpro1, gcpro2;
|
|
|
3790
|
|
|
3791 sym = args[0];
|
|
|
3792 GCPRO2 (sym, val);
|
|
|
3793
|
|
|
3794 for (val = funlist; CONSP (val); 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);
|
|
|
3804 globals = XCDR (globals))
|
|
|
3805 {
|
|
|
3806 args[0] = XCAR (globals);
|
|
|
3807 /* In a global value, t should not occur. If it does, we
|
|
|
3808 must ignore it to avoid an endless loop. */
|
|
|
3809 if (!EQ (args[0], Qt))
|
|
|
3810 Ffuncall (nargs, args);
|
|
|
3811 }
|
|
|
3812 }
|
|
|
3813 else
|
|
|
3814 {
|
|
|
3815 args[0] = XCAR (val);
|
|
|
3816 Ffuncall (nargs, args);
|
|
|
3817 }
|
|
|
3818 }
|
|
|
3819 UNGCPRO;
|
|
|
3820 return Qnil;
|
|
|
3821 }
|
|
|
3822
|
|
|
3823 #endif /* 0 */
|
|
|
3824
|
|
|
3825 void
|
|
|
3826 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3827 {
|
|
|
3828 /* This function can GC */
|
|
|
3829 struct gcpro gcpro1;
|
|
|
3830 int i;
|
|
|
3831 va_list vargs;
|
|
185
|
3832 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3833
|
|
|
3834 va_start (vargs, nargs);
|
|
|
3835 funcall_args[0] = hook_var;
|
|
|
3836 for (i = 0; i < nargs; i++)
|
|
|
3837 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3838 va_end (vargs);
|
|
|
3839
|
|
|
3840 GCPRO1 (*funcall_args);
|
|
|
3841 gcpro1.nvars = nargs + 1;
|
|
|
3842 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3843 UNGCPRO;
|
|
|
3844 }
|
|
|
3845
|
|
|
3846 void
|
|
|
3847 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3848 int nargs, ...)
|
|
|
3849 {
|
|
|
3850 /* This function can GC */
|
|
|
3851 struct gcpro gcpro1;
|
|
|
3852 int i;
|
|
|
3853 va_list vargs;
|
|
185
|
3854 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3855
|
|
|
3856 va_start (vargs, nargs);
|
|
|
3857 funcall_args[0] = hook_var;
|
|
|
3858 for (i = 0; i < nargs; i++)
|
|
|
3859 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3860 va_end (vargs);
|
|
|
3861
|
|
|
3862 GCPRO1 (*funcall_args);
|
|
|
3863 gcpro1.nvars = nargs + 1;
|
|
|
3864 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3865 RUN_HOOKS_TO_COMPLETION);
|
|
|
3866 UNGCPRO;
|
|
|
3867 }
|
|
|
3868
|
|
|
3869 Lisp_Object
|
|
|
3870 run_hook (Lisp_Object hook)
|
|
|
3871 {
|
|
|
3872 Frun_hooks (1, &hook);
|
|
|
3873 return Qnil;
|
|
|
3874 }
|
|
|
3875
|
|
|
3876
|
|
|
3877 /**********************************************************************/
|
|
|
3878 /* Front-ends to eval, funcall, apply */
|
|
|
3879 /**********************************************************************/
|
|
|
3880
|
|
|
3881 /* Apply fn to arg */
|
|
|
3882 Lisp_Object
|
|
|
3883 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3884 {
|
|
|
3885 /* This function can GC */
|
|
|
3886 struct gcpro gcpro1;
|
|
|
3887 Lisp_Object args[2];
|
|
|
3888
|
|
|
3889 if (NILP (arg))
|
|
173
|
3890 return Ffuncall (1, &fn);
|
|
0
|
3891 GCPRO1 (args[0]);
|
|
|
3892 gcpro1.nvars = 2;
|
|
|
3893 args[0] = fn;
|
|
|
3894 args[1] = arg;
|
|
|
3895 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3896 }
|
|
|
3897
|
|
|
3898 /* Call function fn on no arguments */
|
|
|
3899 Lisp_Object
|
|
|
3900 call0 (Lisp_Object fn)
|
|
|
3901 {
|
|
|
3902 /* This function can GC */
|
|
|
3903 struct gcpro gcpro1;
|
|
|
3904
|
|
|
3905 GCPRO1 (fn);
|
|
|
3906 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3907 }
|
|
|
3908
|
|
|
3909 /* Call function fn with argument arg0 */
|
|
|
3910 Lisp_Object
|
|
|
3911 call1 (Lisp_Object fn,
|
|
|
3912 Lisp_Object arg0)
|
|
|
3913 {
|
|
|
3914 /* This function can GC */
|
|
|
3915 struct gcpro gcpro1;
|
|
185
|
3916 Lisp_Object args[2];
|
|
0
|
3917 args[0] = fn;
|
|
|
3918 args[1] = arg0;
|
|
|
3919 GCPRO1 (args[0]);
|
|
|
3920 gcpro1.nvars = 2;
|
|
|
3921 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3922 }
|
|
|
3923
|
|
|
3924 /* Call function fn with arguments arg0, arg1 */
|
|
|
3925 Lisp_Object
|
|
|
3926 call2 (Lisp_Object fn,
|
|
|
3927 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3928 {
|
|
|
3929 /* This function can GC */
|
|
|
3930 struct gcpro gcpro1;
|
|
|
3931 Lisp_Object args[3];
|
|
|
3932 args[0] = fn;
|
|
|
3933 args[1] = arg0;
|
|
|
3934 args[2] = arg1;
|
|
|
3935 GCPRO1 (args[0]);
|
|
|
3936 gcpro1.nvars = 3;
|
|
|
3937 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3938 }
|
|
|
3939
|
|
|
3940 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3941 Lisp_Object
|
|
|
3942 call3 (Lisp_Object fn,
|
|
|
3943 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3944 {
|
|
|
3945 /* This function can GC */
|
|
|
3946 struct gcpro gcpro1;
|
|
|
3947 Lisp_Object args[4];
|
|
|
3948 args[0] = fn;
|
|
|
3949 args[1] = arg0;
|
|
|
3950 args[2] = arg1;
|
|
|
3951 args[3] = arg2;
|
|
|
3952 GCPRO1 (args[0]);
|
|
|
3953 gcpro1.nvars = 4;
|
|
|
3954 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3955 }
|
|
|
3956
|
|
|
3957 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3958 Lisp_Object
|
|
|
3959 call4 (Lisp_Object fn,
|
|
|
3960 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3961 Lisp_Object arg3)
|
|
|
3962 {
|
|
|
3963 /* This function can GC */
|
|
|
3964 struct gcpro gcpro1;
|
|
|
3965 Lisp_Object args[5];
|
|
|
3966 args[0] = fn;
|
|
|
3967 args[1] = arg0;
|
|
|
3968 args[2] = arg1;
|
|
|
3969 args[3] = arg2;
|
|
|
3970 args[4] = arg3;
|
|
|
3971 GCPRO1 (args[0]);
|
|
|
3972 gcpro1.nvars = 5;
|
|
|
3973 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3974 }
|
|
|
3975
|
|
|
3976 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3977 Lisp_Object
|
|
|
3978 call5 (Lisp_Object fn,
|
|
185
|
3979 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3980 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3981 {
|
|
|
3982 /* This function can GC */
|
|
|
3983 struct gcpro gcpro1;
|
|
|
3984 Lisp_Object args[6];
|
|
|
3985 args[0] = fn;
|
|
|
3986 args[1] = arg0;
|
|
|
3987 args[2] = arg1;
|
|
|
3988 args[3] = arg2;
|
|
|
3989 args[4] = arg3;
|
|
|
3990 args[5] = arg4;
|
|
|
3991 GCPRO1 (args[0]);
|
|
|
3992 gcpro1.nvars = 6;
|
|
|
3993 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
3994 }
|
|
|
3995
|
|
|
3996 Lisp_Object
|
|
|
3997 call6 (Lisp_Object fn,
|
|
185
|
3998 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3999 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
4000 {
|
|
|
4001 /* This function can GC */
|
|
|
4002 struct gcpro gcpro1;
|
|
|
4003 Lisp_Object args[7];
|
|
|
4004 args[0] = fn;
|
|
|
4005 args[1] = arg0;
|
|
|
4006 args[2] = arg1;
|
|
|
4007 args[3] = arg2;
|
|
|
4008 args[4] = arg3;
|
|
|
4009 args[5] = arg4;
|
|
|
4010 args[6] = arg5;
|
|
|
4011 GCPRO1 (args[0]);
|
|
|
4012 gcpro1.nvars = 7;
|
|
|
4013 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
4014 }
|
|
|
4015
|
|
|
4016 Lisp_Object
|
|
|
4017 call7 (Lisp_Object fn,
|
|
185
|
4018 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
4019 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4020 Lisp_Object arg6)
|
|
|
4021 {
|
|
|
4022 /* This function can GC */
|
|
|
4023 struct gcpro gcpro1;
|
|
|
4024 Lisp_Object args[8];
|
|
|
4025 args[0] = fn;
|
|
|
4026 args[1] = arg0;
|
|
|
4027 args[2] = arg1;
|
|
|
4028 args[3] = arg2;
|
|
|
4029 args[4] = arg3;
|
|
|
4030 args[5] = arg4;
|
|
|
4031 args[6] = arg5;
|
|
|
4032 args[7] = arg6;
|
|
|
4033 GCPRO1 (args[0]);
|
|
|
4034 gcpro1.nvars = 8;
|
|
|
4035 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
4036 }
|
|
|
4037
|
|
|
4038 Lisp_Object
|
|
|
4039 call8 (Lisp_Object fn,
|
|
185
|
4040 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
4041 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
4042 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
4043 {
|
|
|
4044 /* This function can GC */
|
|
|
4045 struct gcpro gcpro1;
|
|
|
4046 Lisp_Object args[9];
|
|
|
4047 args[0] = fn;
|
|
|
4048 args[1] = arg0;
|
|
|
4049 args[2] = arg1;
|
|
|
4050 args[3] = arg2;
|
|
|
4051 args[4] = arg3;
|
|
|
4052 args[5] = arg4;
|
|
|
4053 args[6] = arg5;
|
|
|
4054 args[7] = arg6;
|
|
|
4055 args[8] = arg7;
|
|
|
4056 GCPRO1 (args[0]);
|
|
|
4057 gcpro1.nvars = 9;
|
|
|
4058 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4059 }
|
|
|
4060
|
|
|
4061 Lisp_Object
|
|
|
4062 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4063 {
|
|
272
|
4064 if (current_buffer == buf)
|
|
|
4065 return call0 (fn);
|
|
|
4066 else
|
|
0
|
4067 {
|
|
272
|
4068 Lisp_Object val;
|
|
|
4069 int speccount = specpdl_depth_counter;
|
|
0
|
4070 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4071 set_buffer_internal (buf);
|
|
272
|
4072 val = call0 (fn);
|
|
|
4073 unbind_to (speccount, Qnil);
|
|
|
4074 return val;
|
|
0
|
4075 }
|
|
|
4076 }
|
|
|
4077
|
|
|
4078 Lisp_Object
|
|
|
4079 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4080 Lisp_Object arg0)
|
|
|
4081 {
|
|
272
|
4082 if (current_buffer == buf)
|
|
|
4083 return call1 (fn, arg0);
|
|
|
4084 else
|
|
0
|
4085 {
|
|
272
|
4086 Lisp_Object val;
|
|
|
4087 int speccount = specpdl_depth_counter;
|
|
0
|
4088 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4089 set_buffer_internal (buf);
|
|
272
|
4090 val = call1 (fn, arg0);
|
|
|
4091 unbind_to (speccount, Qnil);
|
|
|
4092 return val;
|
|
0
|
4093 }
|
|
|
4094 }
|
|
|
4095
|
|
|
4096 Lisp_Object
|
|
|
4097 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4098 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4099 {
|
|
272
|
4100 if (current_buffer == buf)
|
|
|
4101 return call2 (fn, arg0, arg1);
|
|
|
4102 else
|
|
0
|
4103 {
|
|
272
|
4104 Lisp_Object val;
|
|
|
4105 int speccount = specpdl_depth_counter;
|
|
0
|
4106 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4107 set_buffer_internal (buf);
|
|
272
|
4108 val = call2 (fn, arg0, arg1);
|
|
|
4109 unbind_to (speccount, Qnil);
|
|
|
4110 return val;
|
|
0
|
4111 }
|
|
|
4112 }
|
|
|
4113
|
|
|
4114 Lisp_Object
|
|
|
4115 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4116 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4117 {
|
|
272
|
4118 if (current_buffer == buf)
|
|
|
4119 return call3 (fn, arg0, arg1, arg2);
|
|
|
4120 else
|
|
0
|
4121 {
|
|
272
|
4122 Lisp_Object val;
|
|
|
4123 int speccount = specpdl_depth_counter;
|
|
0
|
4124 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4125 set_buffer_internal (buf);
|
|
272
|
4126 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4127 unbind_to (speccount, Qnil);
|
|
|
4128 return val;
|
|
0
|
4129 }
|
|
|
4130 }
|
|
|
4131
|
|
|
4132 Lisp_Object
|
|
|
4133 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4134 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4135 Lisp_Object arg3)
|
|
|
4136 {
|
|
272
|
4137 if (current_buffer == buf)
|
|
|
4138 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4139 else
|
|
0
|
4140 {
|
|
272
|
4141 Lisp_Object val;
|
|
|
4142 int speccount = specpdl_depth_counter;
|
|
0
|
4143 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4144 set_buffer_internal (buf);
|
|
272
|
4145 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4146 unbind_to (speccount, Qnil);
|
|
|
4147 return val;
|
|
0
|
4148 }
|
|
|
4149 }
|
|
|
4150
|
|
|
4151 Lisp_Object
|
|
|
4152 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4153 {
|
|
272
|
4154 if (current_buffer == buf)
|
|
|
4155 return Feval (form);
|
|
|
4156 else
|
|
0
|
4157 {
|
|
272
|
4158 Lisp_Object val;
|
|
|
4159 int speccount = specpdl_depth_counter;
|
|
0
|
4160 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4161 set_buffer_internal (buf);
|
|
272
|
4162 val = Feval (form);
|
|
|
4163 unbind_to (speccount, Qnil);
|
|
|
4164 return val;
|
|
0
|
4165 }
|
|
|
4166 }
|
|
|
4167
|
|
|
4168
|
|
|
4169 /***** Error-catching front-ends to eval, funcall, apply */
|
|
|
4170
|
|
|
4171 /* Call function fn on no arguments, with condition handler */
|
|
|
4172 Lisp_Object
|
|
|
4173 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4174 {
|
|
|
4175 /* This function can GC */
|
|
|
4176 struct gcpro gcpro1;
|
|
|
4177 Lisp_Object args[2];
|
|
|
4178 args[0] = handler;
|
|
|
4179 args[1] = fn;
|
|
|
4180 GCPRO1 (args[0]);
|
|
|
4181 gcpro1.nvars = 2;
|
|
|
4182 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4183 }
|
|
|
4184
|
|
|
4185 /* Call function fn with argument arg0, with condition handler */
|
|
|
4186 Lisp_Object
|
|
|
4187 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4188 Lisp_Object arg0)
|
|
|
4189 {
|
|
|
4190 /* This function can GC */
|
|
|
4191 struct gcpro gcpro1;
|
|
|
4192 Lisp_Object args[3];
|
|
|
4193 args[0] = handler;
|
|
|
4194 args[1] = fn;
|
|
|
4195 args[2] = arg0;
|
|
|
4196 GCPRO1 (args[0]);
|
|
|
4197 gcpro1.nvars = 3;
|
|
|
4198 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4199 }
|
|
|
4200
|
|
|
4201
|
|
|
4202 /* The following functions provide you with error-trapping versions
|
|
|
4203 of the various front-ends above. They take an additional
|
|
|
4204 "warning_string" argument; if non-zero, a warning with this
|
|
|
4205 string and the actual error that occurred will be displayed
|
|
|
4206 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4207 QUIT is inhibited while these functions are running, and if
|
|
|
4208 an error occurs, Qunbound is returned instead of the normal
|
|
|
4209 return value.
|
|
|
4210 */
|
|
|
4211
|
|
185
|
4212 /* #### This stuff needs to catch throws as well. We need to
|
|
0
|
4213 improve internal_catch() so it can take a "catch anything"
|
|
|
4214 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4215
|
|
|
4216 static Lisp_Object
|
|
|
4217 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4218 {
|
|
|
4219 if (!NILP (errordata))
|
|
|
4220 {
|
|
|
4221 Lisp_Object args[2];
|
|
185
|
4222
|
|
0
|
4223 if (!NILP (arg))
|
|
|
4224 {
|
|
|
4225 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4226 args[0] = build_string (str);
|
|
|
4227 }
|
|
|
4228 else
|
|
|
4229 args[0] = build_string ("error");
|
|
|
4230 /* #### This should call
|
|
|
4231 (with-output-to-string (display-error errordata))
|
|
|
4232 but that stuff is all in Lisp currently. */
|
|
|
4233 args[1] = errordata;
|
|
|
4234 warn_when_safe_lispobj
|
|
|
4235 (Qerror, Qwarning,
|
|
|
4236 emacs_doprnt_string_lisp ((CONST Bufbyte *) "%s: %s",
|
|
|
4237 Qnil, -1, 2, args));
|
|
|
4238 }
|
|
|
4239 return Qunbound;
|
|
|
4240 }
|
|
|
4241
|
|
|
4242 static Lisp_Object
|
|
|
4243 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4244 {
|
|
|
4245 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4246 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4247 return caught_a_squirmer (errordata, arg);
|
|
|
4248 }
|
|
|
4249
|
|
|
4250 static Lisp_Object
|
|
|
4251 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4252 {
|
|
|
4253 Lisp_Object hook = Fcar (arg);
|
|
|
4254 arg = Fcdr (arg);
|
|
|
4255 /* Clear out the hook. */
|
|
|
4256 Fset (hook, Qnil);
|
|
|
4257 return caught_a_squirmer (errordata, arg);
|
|
|
4258 }
|
|
|
4259
|
|
|
4260 static Lisp_Object
|
|
|
4261 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4262 Lisp_Object arg)
|
|
|
4263 {
|
|
|
4264 Lisp_Object hook = Fcar (arg);
|
|
|
4265 arg = Fcdr (arg);
|
|
|
4266 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4267 /* Clear out the hook. */
|
|
|
4268 Fset (hook, Qnil);
|
|
|
4269 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4270 }
|
|
|
4271
|
|
|
4272 static Lisp_Object
|
|
|
4273 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4274 {
|
|
|
4275 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4276 }
|
|
|
4277
|
|
|
4278 Lisp_Object
|
|
|
4279 eval_in_buffer_trapping_errors (CONST char *warning_string,
|
|
|
4280 struct buffer *buf, Lisp_Object form)
|
|
|
4281 {
|
|
272
|
4282 int speccount = specpdl_depth_counter;
|
|
0
|
4283 Lisp_Object tem;
|
|
272
|
4284 Lisp_Object buffer;
|
|
0
|
4285 Lisp_Object cons;
|
|
|
4286 Lisp_Object opaque;
|
|
|
4287 struct gcpro gcpro1, gcpro2;
|
|
|
4288
|
|
|
4289 XSETBUFFER (buffer, buf);
|
|
|
4290
|
|
|
4291 specbind (Qinhibit_quit, Qt);
|
|
|
4292 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4293
|
|
|
4294 cons = noseeum_cons (buffer, form);
|
|
|
4295 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4296 GCPRO2 (cons, opaque);
|
|
|
4297 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4298 tem = condition_case_1 (Qerror,
|
|
|
4299 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4300 caught_a_squirmer, opaque);
|
|
|
4301 free_cons (XCONS (cons));
|
|
|
4302 if (OPAQUEP (opaque))
|
|
|
4303 free_opaque_ptr (opaque);
|
|
|
4304 UNGCPRO;
|
|
185
|
4305
|
|
0
|
4306 /* gc_currently_forbidden = 0; */
|
|
|
4307 return unbind_to (speccount, tem);
|
|
|
4308 }
|
|
|
4309
|
|
|
4310 static Lisp_Object
|
|
|
4311 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4312 {
|
|
|
4313 /* This function can GC */
|
|
|
4314 run_hook (hook_symbol);
|
|
|
4315 return Qnil;
|
|
|
4316 }
|
|
|
4317
|
|
|
4318 Lisp_Object
|
|
|
4319 run_hook_trapping_errors (CONST char *warning_string, Lisp_Object hook_symbol)
|
|
|
4320 {
|
|
272
|
4321 int speccount;
|
|
0
|
4322 Lisp_Object tem;
|
|
|
4323 Lisp_Object opaque;
|
|
|
4324 struct gcpro gcpro1;
|
|
|
4325
|
|
|
4326 if (!initialized || preparing_for_armageddon)
|
|
|
4327 return Qnil;
|
|
|
4328 tem = find_symbol_value (hook_symbol);
|
|
|
4329 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4330 return Qnil;
|
|
|
4331
|
|
272
|
4332 speccount = specpdl_depth_counter;
|
|
0
|
4333 specbind (Qinhibit_quit, Qt);
|
|
|
4334
|
|
|
4335 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4336 GCPRO1 (opaque);
|
|
|
4337 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4338 tem = condition_case_1 (Qerror,
|
|
|
4339 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4340 caught_a_squirmer, opaque);
|
|
|
4341 if (OPAQUEP (opaque))
|
|
|
4342 free_opaque_ptr (opaque);
|
|
|
4343 UNGCPRO;
|
|
|
4344
|
|
|
4345 return unbind_to (speccount, tem);
|
|
|
4346 }
|
|
|
4347
|
|
|
4348 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4349 if an error occurs. */
|
|
|
4350
|
|
|
4351 Lisp_Object
|
|
|
4352 safe_run_hook_trapping_errors (CONST char *warning_string,
|
|
|
4353 Lisp_Object hook_symbol,
|
|
|
4354 int allow_quit)
|
|
|
4355 {
|
|
272
|
4356 int speccount = specpdl_depth_counter;
|
|
0
|
4357 Lisp_Object tem;
|
|
|
4358 Lisp_Object cons = Qnil;
|
|
|
4359 struct gcpro gcpro1;
|
|
|
4360
|
|
|
4361 if (!initialized || preparing_for_armageddon)
|
|
|
4362 return Qnil;
|
|
|
4363 tem = find_symbol_value (hook_symbol);
|
|
|
4364 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4365 return Qnil;
|
|
|
4366
|
|
|
4367 if (!allow_quit)
|
|
|
4368 specbind (Qinhibit_quit, Qt);
|
|
|
4369
|
|
185
|
4370 cons = noseeum_cons (hook_symbol,
|
|
0
|
4371 warning_string ? make_opaque_ptr (warning_string)
|
|
|
4372 : Qnil);
|
|
|
4373 GCPRO1 (cons);
|
|
|
4374 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4375 tem = condition_case_1 (Qerror,
|
|
|
4376 catch_them_squirmers_run_hook,
|
|
|
4377 hook_symbol,
|
|
|
4378 allow_quit ?
|
|
|
4379 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4380 safe_run_hook_caught_a_squirmer,
|
|
|
4381 cons);
|
|
|
4382 if (OPAQUEP (XCDR (cons)))
|
|
|
4383 free_opaque_ptr (XCDR (cons));
|
|
|
4384 free_cons (XCONS (cons));
|
|
|
4385 UNGCPRO;
|
|
|
4386
|
|
|
4387 return unbind_to (speccount, tem);
|
|
|
4388 }
|
|
|
4389
|
|
|
4390 static Lisp_Object
|
|
|
4391 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4392 {
|
|
|
4393 /* This function can GC */
|
|
|
4394 return call0 (function);
|
|
|
4395 }
|
|
|
4396
|
|
|
4397 Lisp_Object
|
|
|
4398 call0_trapping_errors (CONST char *warning_string, Lisp_Object function)
|
|
|
4399 {
|
|
272
|
4400 int speccount;
|
|
0
|
4401 Lisp_Object tem;
|
|
|
4402 Lisp_Object opaque = Qnil;
|
|
|
4403 struct gcpro gcpro1, gcpro2;
|
|
|
4404
|
|
|
4405 if (SYMBOLP (function))
|
|
|
4406 {
|
|
|
4407 tem = XSYMBOL (function)->function;
|
|
|
4408 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4409 return Qnil;
|
|
0
|
4410 }
|
|
|
4411
|
|
|
4412 GCPRO2 (opaque, function);
|
|
272
|
4413 speccount = specpdl_depth_counter;
|
|
0
|
4414 specbind (Qinhibit_quit, Qt);
|
|
|
4415 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4416
|
|
|
4417 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4418 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4419 tem = condition_case_1 (Qerror,
|
|
|
4420 catch_them_squirmers_call0, function,
|
|
|
4421 caught_a_squirmer, opaque);
|
|
|
4422 if (OPAQUEP (opaque))
|
|
|
4423 free_opaque_ptr (opaque);
|
|
|
4424 UNGCPRO;
|
|
|
4425
|
|
|
4426 /* gc_currently_forbidden = 0; */
|
|
|
4427 return unbind_to (speccount, tem);
|
|
|
4428 }
|
|
|
4429
|
|
|
4430 static Lisp_Object
|
|
|
4431 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4432 {
|
|
|
4433 /* This function can GC */
|
|
|
4434 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4435 }
|
|
|
4436
|
|
|
4437 static Lisp_Object
|
|
|
4438 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4439 {
|
|
|
4440 /* This function can GC */
|
|
|
4441 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4442 }
|
|
|
4443
|
|
|
4444 Lisp_Object
|
|
|
4445 call1_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4446 Lisp_Object object)
|
|
|
4447 {
|
|
272
|
4448 int speccount = specpdl_depth_counter;
|
|
0
|
4449 Lisp_Object tem;
|
|
|
4450 Lisp_Object cons = Qnil;
|
|
|
4451 Lisp_Object opaque = Qnil;
|
|
|
4452 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4453
|
|
|
4454 if (SYMBOLP (function))
|
|
|
4455 {
|
|
|
4456 tem = XSYMBOL (function)->function;
|
|
|
4457 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4458 return Qnil;
|
|
0
|
4459 }
|
|
|
4460
|
|
|
4461 GCPRO4 (cons, opaque, function, object);
|
|
|
4462
|
|
|
4463 specbind (Qinhibit_quit, Qt);
|
|
|
4464 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4465
|
|
|
4466 cons = noseeum_cons (function, object);
|
|
|
4467 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4468 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4469 tem = condition_case_1 (Qerror,
|
|
|
4470 catch_them_squirmers_call1, cons,
|
|
|
4471 caught_a_squirmer, opaque);
|
|
|
4472 if (OPAQUEP (opaque))
|
|
|
4473 free_opaque_ptr (opaque);
|
|
|
4474 free_cons (XCONS (cons));
|
|
|
4475 UNGCPRO;
|
|
185
|
4476
|
|
0
|
4477 /* gc_currently_forbidden = 0; */
|
|
|
4478 return unbind_to (speccount, tem);
|
|
|
4479 }
|
|
|
4480
|
|
|
4481 Lisp_Object
|
|
|
4482 call2_trapping_errors (CONST char *warning_string, Lisp_Object function,
|
|
|
4483 Lisp_Object object1, Lisp_Object object2)
|
|
|
4484 {
|
|
272
|
4485 int speccount = specpdl_depth_counter;
|
|
0
|
4486 Lisp_Object tem;
|
|
|
4487 Lisp_Object cons = Qnil;
|
|
|
4488 Lisp_Object opaque = Qnil;
|
|
|
4489 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4490
|
|
|
4491 if (SYMBOLP (function))
|
|
|
4492 {
|
|
|
4493 tem = XSYMBOL (function)->function;
|
|
|
4494 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4495 return Qnil;
|
|
0
|
4496 }
|
|
|
4497
|
|
|
4498 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4499 specbind (Qinhibit_quit, Qt);
|
|
|
4500 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4501
|
|
|
4502 cons = list3 (function, object1, object2);
|
|
|
4503 opaque = (warning_string ? make_opaque_ptr (warning_string) : Qnil);
|
|
|
4504 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4505 tem = condition_case_1 (Qerror,
|
|
|
4506 catch_them_squirmers_call2, cons,
|
|
|
4507 caught_a_squirmer, opaque);
|
|
|
4508 if (OPAQUEP (opaque))
|
|
|
4509 free_opaque_ptr (opaque);
|
|
|
4510 free_list (cons);
|
|
|
4511 UNGCPRO;
|
|
|
4512
|
|
|
4513 /* gc_currently_forbidden = 0; */
|
|
|
4514 return unbind_to (speccount, tem);
|
|
|
4515 }
|
|
|
4516
|
|
|
4517
|
|
|
4518 /**********************************************************************/
|
|
|
4519 /* The special binding stack */
|
|
|
4520 /**********************************************************************/
|
|
|
4521
|
|
2
|
4522 #define min_max_specpdl_size 400
|
|
|
4523
|
|
0
|
4524 static void
|
|
|
4525 grow_specpdl (void)
|
|
|
4526 {
|
|
|
4527 if (specpdl_size >= max_specpdl_size)
|
|
|
4528 {
|
|
2
|
4529 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4530 max_specpdl_size = min_max_specpdl_size;
|
|
0
|
4531 if (specpdl_size >= max_specpdl_size)
|
|
|
4532 {
|
|
|
4533 if (!NILP (Vdebug_on_error) || !NILP (Vdebug_on_signal))
|
|
|
4534 /* Leave room for some specpdl in the debugger. */
|
|
|
4535 max_specpdl_size = specpdl_size + 100;
|
|
|
4536 continuable_error
|
|
|
4537 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4538 }
|
|
|
4539 }
|
|
|
4540 specpdl_size *= 2;
|
|
|
4541 if (specpdl_size > max_specpdl_size)
|
|
|
4542 specpdl_size = max_specpdl_size;
|
|
185
|
4543 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
0
|
4544 specpdl_ptr = specpdl + specpdl_depth_counter;
|
|
|
4545 }
|
|
|
4546
|
|
|
4547
|
|
|
4548 /* Handle unbinding buffer-local variables */
|
|
|
4549 static Lisp_Object
|
|
|
4550 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4551 {
|
|
|
4552 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4553 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4554 struct Lisp_Cons *victim = XCONS (ovalue);
|
|
|
4555 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4556 ovalue = victim->cdr;
|
|
|
4557
|
|
|
4558 free_cons (victim);
|
|
|
4559
|
|
|
4560 if (NILP (buf))
|
|
|
4561 {
|
|
|
4562 /* Deleted buffer -- do nothing */
|
|
|
4563 }
|
|
|
4564 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4565 {
|
|
|
4566 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4567 * (kill-local-variable can do this.)
|
|
|
4568 * Do nothing in this case.
|
|
|
4569 */
|
|
|
4570 }
|
|
|
4571 else if (EQ (buf, current))
|
|
|
4572 Fset (symbol, ovalue);
|
|
|
4573 else
|
|
|
4574 {
|
|
|
4575 /* Urk! Somebody switched buffers */
|
|
|
4576 struct gcpro gcpro1;
|
|
|
4577 GCPRO1 (current);
|
|
|
4578 Fset_buffer (buf);
|
|
|
4579 Fset (symbol, ovalue);
|
|
|
4580 Fset_buffer (current);
|
|
|
4581 UNGCPRO;
|
|
|
4582 }
|
|
173
|
4583 return symbol;
|
|
0
|
4584 }
|
|
|
4585
|
|
|
4586 static Lisp_Object
|
|
|
4587 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4588 {
|
|
|
4589 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4590 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4591
|
|
|
4592 buffer = get_buffer (buffer, 0);
|
|
|
4593 if (NILP (buffer))
|
|
|
4594 {
|
|
|
4595 /* Deleted buffer -- do nothing */
|
|
|
4596 }
|
|
|
4597 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4598 {
|
|
|
4599 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4600 * (kill-local-variable can do this.)
|
|
|
4601 * Do nothing in this case.
|
|
|
4602 */
|
|
|
4603 }
|
|
|
4604 else if (EQ (buffer, current))
|
|
|
4605 Fkill_local_variable (symbol);
|
|
|
4606 else
|
|
|
4607 {
|
|
|
4608 /* Urk! Somebody switched buffers */
|
|
|
4609 struct gcpro gcpro1;
|
|
|
4610 GCPRO1 (current);
|
|
|
4611 Fset_buffer (buffer);
|
|
|
4612 Fkill_local_variable (symbol);
|
|
|
4613 Fset_buffer (current);
|
|
|
4614 UNGCPRO;
|
|
|
4615 }
|
|
173
|
4616 return symbol;
|
|
0
|
4617 }
|
|
|
4618
|
|
|
4619
|
|
|
4620 void
|
|
|
4621 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4622 {
|
|
|
4623 int buffer_local;
|
|
|
4624
|
|
|
4625 CHECK_SYMBOL (symbol);
|
|
|
4626
|
|
|
4627 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4628 grow_specpdl ();
|
|
|
4629
|
|
|
4630 buffer_local = symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4631 if (buffer_local == 0)
|
|
|
4632 {
|
|
|
4633 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4634 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4635 }
|
|
|
4636 else if (buffer_local > 0)
|
|
|
4637 {
|
|
|
4638 /* Already buffer-local */
|
|
|
4639 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4640 find_symbol_value (symbol));
|
|
|
4641 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4642 }
|
|
|
4643 else
|
|
|
4644 {
|
|
|
4645 /* About to become buffer-local */
|
|
|
4646 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4647 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4648 }
|
|
185
|
4649
|
|
0
|
4650 specpdl_ptr->symbol = symbol;
|
|
|
4651 specpdl_ptr++;
|
|
|
4652 specpdl_depth_counter++;
|
|
|
4653
|
|
|
4654 Fset (symbol, value);
|
|
|
4655 }
|
|
|
4656
|
|
|
4657 void
|
|
|
4658 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4659 Lisp_Object arg)
|
|
|
4660 {
|
|
|
4661 if (specpdl_depth_counter >= specpdl_size)
|
|
|
4662 grow_specpdl ();
|
|
|
4663 specpdl_ptr->func = function;
|
|
|
4664 specpdl_ptr->symbol = Qnil;
|
|
|
4665 specpdl_ptr->old_value = arg;
|
|
|
4666 specpdl_ptr++;
|
|
|
4667 specpdl_depth_counter++;
|
|
|
4668 }
|
|
|
4669
|
|
|
4670 extern int check_sigio (void);
|
|
|
4671
|
|
|
4672 Lisp_Object
|
|
|
4673 unbind_to (int count, Lisp_Object value)
|
|
|
4674 {
|
|
|
4675 int quitf;
|
|
|
4676 struct gcpro gcpro1;
|
|
|
4677
|
|
|
4678 GCPRO1 (value);
|
|
|
4679
|
|
|
4680 check_quit (); /* make Vquit_flag accurate */
|
|
|
4681 quitf = !NILP (Vquit_flag);
|
|
|
4682 Vquit_flag = Qnil;
|
|
|
4683
|
|
|
4684 while (specpdl_depth_counter != count)
|
|
|
4685 {
|
|
|
4686 Lisp_Object ovalue;
|
|
|
4687 --specpdl_ptr;
|
|
|
4688 --specpdl_depth_counter;
|
|
|
4689
|
|
|
4690 ovalue = specpdl_ptr->old_value;
|
|
|
4691 if (specpdl_ptr->func != 0)
|
|
|
4692 /* An unwind-protect */
|
|
|
4693 (*specpdl_ptr->func) (ovalue);
|
|
|
4694 else
|
|
|
4695 Fset (specpdl_ptr->symbol, ovalue);
|
|
|
4696
|
|
|
4697 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4698 /* There should never be anything here for us to remove.
|
|
|
4699 If so, it indicates a logic error in Emacs. Catches
|
|
|
4700 should get removed when a throw or signal occurs, or
|
|
|
4701 when a catch or condition-case exits normally. But
|
|
|
4702 it's too dangerous to just remove this code. --ben */
|
|
|
4703
|
|
|
4704 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4705 Braino on mly's part? */
|
|
|
4706 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4707 that catch can't possibly still be valid. */
|
|
|
4708 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4709 {
|
|
|
4710 catchlist = catchlist->next;
|
|
|
4711 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4712 }
|
|
|
4713 #endif
|
|
|
4714 }
|
|
|
4715 if (quitf)
|
|
|
4716 Vquit_flag = Qt;
|
|
|
4717
|
|
|
4718 UNGCPRO;
|
|
|
4719
|
|
173
|
4720 return value;
|
|
0
|
4721 }
|
|
|
4722
|
|
|
4723
|
|
|
4724 int
|
|
|
4725 specpdl_depth (void)
|
|
|
4726 {
|
|
173
|
4727 return specpdl_depth_counter;
|
|
0
|
4728 }
|
|
|
4729
|
|
|
4730
|
|
|
4731 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4732 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4733
|
|
|
4734 Lisp_Object
|
|
|
4735 top_level_value (Lisp_Object symbol)
|
|
|
4736 {
|
|
|
4737 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4738
|
|
|
4739 CHECK_SYMBOL (symbol);
|
|
|
4740 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4741 {
|
|
|
4742 if (EQ (ptr->symbol, symbol))
|
|
|
4743 return ptr->old_value;
|
|
|
4744 }
|
|
|
4745 return XSYMBOL (symbol)->value;
|
|
|
4746 }
|
|
|
4747
|
|
|
4748 #if 0
|
|
|
4749
|
|
|
4750 Lisp_Object
|
|
|
4751 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4752 {
|
|
|
4753 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4754
|
|
|
4755 CHECK_SYMBOL (symbol);
|
|
|
4756 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4757 {
|
|
|
4758 if (EQ (ptr->symbol, symbol))
|
|
|
4759 {
|
|
|
4760 ptr->old_value = newval;
|
|
|
4761 return newval;
|
|
|
4762 }
|
|
|
4763 }
|
|
|
4764 return Fset (symbol, newval);
|
|
185
|
4765 }
|
|
0
|
4766
|
|
|
4767 #endif /* 0 */
|
|
|
4768
|
|
|
4769
|
|
|
4770 /**********************************************************************/
|
|
|
4771 /* Backtraces */
|
|
|
4772 /**********************************************************************/
|
|
|
4773
|
|
20
|
4774 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4775 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4776 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4777 */
|
|
|
4778 (level, flag))
|
|
0
|
4779 {
|
|
|
4780 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4781 REGISTER int i;
|
|
|
4782
|
|
|
4783 CHECK_INT (level);
|
|
|
4784
|
|
|
4785 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4786 {
|
|
|
4787 backlist = backlist->next;
|
|
|
4788 }
|
|
|
4789
|
|
|
4790 if (backlist)
|
|
|
4791 backlist->debug_on_exit = !NILP (flag);
|
|
|
4792
|
|
|
4793 return flag;
|
|
|
4794 }
|
|
|
4795
|
|
|
4796 static void
|
|
|
4797 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4798 {
|
|
|
4799 int printing_bindings = 0;
|
|
|
4800
|
|
|
4801 for (; speccount > speclimit; speccount--)
|
|
|
4802 {
|
|
|
4803 if (specpdl[speccount - 1].func == 0
|
|
|
4804 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4805 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4806 {
|
|
|
4807 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4808 stream);
|
|
|
4809 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4810 printing_bindings = 1;
|
|
|
4811 }
|
|
|
4812 else
|
|
|
4813 {
|
|
|
4814 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4815 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4816 printing_bindings = 0;
|
|
|
4817 }
|
|
|
4818 }
|
|
|
4819 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4820 }
|
|
|
4821
|
|
20
|
4822 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4823 Print a trace of Lisp function calls currently active.
|
|
|
4824 Option arg STREAM specifies the output stream to send the backtrace to,
|
|
|
4825 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4826 DETAILED means show places where currently active variable bindings,
|
|
|
4827 catches, condition-cases, and unwind-protects were made as well as
|
|
185
|
4828 function calls.
|
|
20
|
4829 */
|
|
|
4830 (stream, detailed))
|
|
0
|
4831 {
|
|
249
|
4832 /* This function can GC */
|
|
0
|
4833 struct backtrace *backlist = backtrace_list;
|
|
|
4834 struct catchtag *catches = catchlist;
|
|
|
4835 int speccount = specpdl_depth_counter;
|
|
|
4836
|
|
|
4837 int old_nl = print_escape_newlines;
|
|
|
4838 int old_pr = print_readably;
|
|
|
4839 Lisp_Object old_level = Vprint_level;
|
|
|
4840 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4841 struct gcpro gcpro1, gcpro2;
|
|
|
4842
|
|
|
4843 /* We can't allow quits in here because that could cause the values
|
|
|
4844 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4845 Normally we would use a record_unwind_protect but that would
|
|
|
4846 screw up the functioning of this function. */
|
|
|
4847 Vinhibit_quit = Qt;
|
|
|
4848
|
|
|
4849 entering_debugger = 0;
|
|
|
4850
|
|
|
4851 Vprint_level = make_int (3);
|
|
|
4852 print_readably = 0;
|
|
|
4853 print_escape_newlines = 1;
|
|
|
4854
|
|
|
4855 GCPRO2 (stream, old_level);
|
|
|
4856
|
|
|
4857 if (NILP (stream))
|
|
|
4858 stream = Vstandard_output;
|
|
|
4859 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4860 stream = Fselected_frame (Qnil);
|
|
|
4861
|
|
|
4862 for (;;)
|
|
|
4863 {
|
|
|
4864 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4865 {
|
|
|
4866 int catchpdl = catches->pdlcount;
|
|
|
4867 if (specpdl[catchpdl].func == condition_case_unwind
|
|
|
4868 && speccount > catchpdl)
|
|
|
4869 /* This is a condition-case catchpoint */
|
|
|
4870 catchpdl = catchpdl + 1;
|
|
185
|
4871
|
|
0
|
4872 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4873
|
|
|
4874 speccount = catches->pdlcount;
|
|
|
4875 if (catchpdl == speccount)
|
|
|
4876 {
|
|
|
4877 write_c_string (" # (catch ", stream);
|
|
|
4878 Fprin1 (catches->tag, stream);
|
|
|
4879 write_c_string (" ...)\n", stream);
|
|
|
4880 }
|
|
|
4881 else
|
|
|
4882 {
|
|
|
4883 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4884 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4885 write_c_string (")\n", stream);
|
|
|
4886 }
|
|
|
4887 catches = catches->next;
|
|
|
4888 }
|
|
|
4889 else if (!backlist)
|
|
|
4890 break;
|
|
|
4891 else
|
|
|
4892 {
|
|
|
4893 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4894 {
|
|
|
4895 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4896 speccount = backlist->pdlcount;
|
|
|
4897 }
|
|
|
4898 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4899 stream);
|
|
|
4900 if (backlist->nargs == UNEVALLED)
|
|
|
4901 {
|
|
|
4902 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4903 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4904 }
|
|
|
4905 else
|
|
|
4906 {
|
|
|
4907 Lisp_Object tem = *backlist->function;
|
|
|
4908 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4909 write_c_string ("(", stream);
|
|
|
4910 if (backlist->nargs == MANY)
|
|
|
4911 {
|
|
|
4912 int i;
|
|
|
4913 Lisp_Object tail = Qnil;
|
|
|
4914 struct gcpro ngcpro1;
|
|
|
4915
|
|
|
4916 NGCPRO1 (tail);
|
|
|
4917 for (tail = *backlist->args, i = 0;
|
|
|
4918 !NILP (tail);
|
|
|
4919 tail = Fcdr (tail), i++)
|
|
|
4920 {
|
|
|
4921 if (i != 0) write_c_string (" ", stream);
|
|
|
4922 Fprin1 (Fcar (tail), stream);
|
|
|
4923 }
|
|
|
4924 NUNGCPRO;
|
|
|
4925 }
|
|
|
4926 else
|
|
|
4927 {
|
|
|
4928 int i;
|
|
|
4929 for (i = 0; i < backlist->nargs; i++)
|
|
|
4930 {
|
|
241
|
4931 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
4932 write_c_string("\"...\"", stream);
|
|
|
4933 continue;
|
|
|
4934 }
|
|
0
|
4935 if (i != 0) write_c_string (" ", stream);
|
|
|
4936 Fprin1 (backlist->args[i], stream);
|
|
|
4937 }
|
|
|
4938 }
|
|
|
4939 }
|
|
|
4940 write_c_string (")\n", stream);
|
|
|
4941 backlist = backlist->next;
|
|
|
4942 }
|
|
|
4943 }
|
|
|
4944 Vprint_level = old_level;
|
|
|
4945 print_readably = old_pr;
|
|
|
4946 print_escape_newlines = old_nl;
|
|
|
4947 UNGCPRO;
|
|
|
4948 Vinhibit_quit = oiq;
|
|
|
4949 return Qnil;
|
|
|
4950 }
|
|
|
4951
|
|
|
4952
|
|
20
|
4953 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
4954 Return the function and arguments N frames up from current execution point.
|
|
|
4955 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
4956 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
4957 If that frame has evaluated its arguments and called its function already,
|
|
|
4958 the value is (t FUNCTION ARG-VALUES...).
|
|
|
4959 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
4960 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
4961 or a lambda expression for macro calls.
|
|
|
4962 If N is more than the number of frames, the value is nil.
|
|
20
|
4963 */
|
|
|
4964 (nframes))
|
|
0
|
4965 {
|
|
|
4966 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4967 REGISTER int i;
|
|
|
4968 Lisp_Object tem;
|
|
|
4969
|
|
|
4970 CHECK_NATNUM (nframes);
|
|
|
4971
|
|
|
4972 /* Find the frame requested. */
|
|
|
4973 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
4974 backlist = backlist->next;
|
|
|
4975
|
|
|
4976 if (!backlist)
|
|
|
4977 return Qnil;
|
|
|
4978 if (backlist->nargs == UNEVALLED)
|
|
|
4979 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
4980 else
|
|
|
4981 {
|
|
|
4982 if (backlist->nargs == MANY)
|
|
|
4983 tem = *backlist->args;
|
|
|
4984 else
|
|
|
4985 tem = Flist (backlist->nargs, backlist->args);
|
|
|
4986
|
|
|
4987 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
4988 }
|
|
|
4989 }
|
|
|
4990
|
|
|
4991
|
|
|
4992 /**********************************************************************/
|
|
|
4993 /* Warnings */
|
|
|
4994 /**********************************************************************/
|
|
|
4995
|
|
|
4996 void
|
|
|
4997 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
4998 Lisp_Object obj)
|
|
|
4999 {
|
|
|
5000 obj = list1 (list3 (class, level, obj));
|
|
|
5001 if (NILP (Vpending_warnings))
|
|
|
5002 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
5003 else
|
|
|
5004 {
|
|
|
5005 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
5006 Vpending_warnings_tail = obj;
|
|
|
5007 }
|
|
|
5008 }
|
|
|
5009
|
|
|
5010 /* #### This should probably accept Lisp objects; but then we have
|
|
|
5011 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
5012
|
|
|
5013 An alternative approach is to just pass some non-string type of
|
|
|
5014 Lisp Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
|
5015 automatically be called when it is safe to do so. */
|
|
|
5016
|
|
|
5017 void
|
|
|
5018 warn_when_safe (Lisp_Object class, Lisp_Object level, CONST char *fmt, ...)
|
|
|
5019 {
|
|
|
5020 Lisp_Object obj;
|
|
|
5021 va_list args;
|
|
|
5022
|
|
|
5023 va_start (args, fmt);
|
|
|
5024 obj = emacs_doprnt_string_va ((CONST Bufbyte *) GETTEXT (fmt),
|
|
|
5025 Qnil, -1, args);
|
|
|
5026 va_end (args);
|
|
|
5027
|
|
|
5028 warn_when_safe_lispobj (class, level, obj);
|
|
|
5029 }
|
|
|
5030
|
|
|
5031
|
|
|
5032
|
|
|
5033
|
|
|
5034 /**********************************************************************/
|
|
|
5035 /* Initialization */
|
|
|
5036 /**********************************************************************/
|
|
|
5037
|
|
|
5038 void
|
|
|
5039 syms_of_eval (void)
|
|
|
5040 {
|
|
|
5041 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5042 defsymbol (&Qautoload, "autoload");
|
|
|
5043 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5044 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5045 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5046 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5047 defsymbol (&Qdebugger, "debugger");
|
|
|
5048 defsymbol (&Qmacro, "macro");
|
|
|
5049 defsymbol (&Qand_rest, "&rest");
|
|
|
5050 defsymbol (&Qand_optional, "&optional");
|
|
|
5051 /* Note that the process code also uses Qexit */
|
|
|
5052 defsymbol (&Qexit, "exit");
|
|
|
5053 defsymbol (&Qsetq, "setq");
|
|
|
5054 defsymbol (&Qinteractive, "interactive");
|
|
|
5055 defsymbol (&Qcommandp, "commandp");
|
|
|
5056 defsymbol (&Qdefun, "defun");
|
|
|
5057 defsymbol (&Qprogn, "progn");
|
|
|
5058 defsymbol (&Qvalues, "values");
|
|
|
5059 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5060 defsymbol (&Qrun_hooks, "run-hooks");
|
|
|
5061
|
|
20
|
5062 DEFSUBR (For);
|
|
|
5063 DEFSUBR (Fand);
|
|
|
5064 DEFSUBR (Fif);
|
|
|
5065 DEFSUBR (Fcond);
|
|
|
5066 DEFSUBR (Fprogn);
|
|
|
5067 DEFSUBR (Fprog1);
|
|
|
5068 DEFSUBR (Fprog2);
|
|
|
5069 DEFSUBR (Fsetq);
|
|
|
5070 DEFSUBR (Fquote);
|
|
|
5071 DEFSUBR (Ffunction);
|
|
|
5072 DEFSUBR (Fdefun);
|
|
|
5073 DEFSUBR (Fdefmacro);
|
|
|
5074 DEFSUBR (Fdefvar);
|
|
|
5075 DEFSUBR (Fdefconst);
|
|
|
5076 DEFSUBR (Fuser_variable_p);
|
|
|
5077 DEFSUBR (Flet);
|
|
|
5078 DEFSUBR (FletX);
|
|
|
5079 DEFSUBR (Fwhile);
|
|
|
5080 DEFSUBR (Fmacroexpand_internal);
|
|
|
5081 DEFSUBR (Fcatch);
|
|
|
5082 DEFSUBR (Fthrow);
|
|
|
5083 DEFSUBR (Funwind_protect);
|
|
|
5084 DEFSUBR (Fcondition_case);
|
|
|
5085 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5086 DEFSUBR (Fsignal);
|
|
|
5087 DEFSUBR (Finteractive_p);
|
|
|
5088 DEFSUBR (Fcommandp);
|
|
|
5089 DEFSUBR (Fcommand_execute);
|
|
|
5090 DEFSUBR (Fautoload);
|
|
|
5091 DEFSUBR (Feval);
|
|
|
5092 DEFSUBR (Fapply);
|
|
|
5093 DEFSUBR (Ffuncall);
|
|
|
5094 DEFSUBR (Ffunction_min_args);
|
|
|
5095 DEFSUBR (Ffunction_max_args);
|
|
|
5096 DEFSUBR (Frun_hooks);
|
|
|
5097 DEFSUBR (Frun_hook_with_args);
|
|
|
5098 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5099 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5100 DEFSUBR (Ffetch_bytecode);
|
|
|
5101 DEFSUBR (Fbacktrace_debug);
|
|
|
5102 DEFSUBR (Fbacktrace);
|
|
|
5103 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5104 }
|
|
|
5105
|
|
|
5106 void
|
|
|
5107 reinit_eval (void)
|
|
|
5108 {
|
|
|
5109 specpdl_ptr = specpdl;
|
|
|
5110 specpdl_depth_counter = 0;
|
|
|
5111 catchlist = 0;
|
|
|
5112 Vcondition_handlers = Qnil;
|
|
|
5113 backtrace_list = 0;
|
|
|
5114 Vquit_flag = Qnil;
|
|
|
5115 debug_on_next_call = 0;
|
|
|
5116 lisp_eval_depth = 0;
|
|
|
5117 entering_debugger = 0;
|
|
|
5118 }
|
|
|
5119
|
|
|
5120 void
|
|
|
5121 vars_of_eval (void)
|
|
|
5122 {
|
|
|
5123 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5124 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5125 */ );
|
|
|
5126
|
|
|
5127 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5128 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5129 This limit is to catch infinite recursions for you before they cause
|
|
|
5130 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5131 You can safely make it considerably larger than its default value,
|
|
|
5132 if that proves inconveniently small.
|
|
|
5133 */ );
|
|
|
5134
|
|
|
5135 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5136 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5137 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5138 */ );
|
|
|
5139 Vquit_flag = Qnil;
|
|
|
5140
|
|
|
5141 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5142 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5143 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5144 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5145 To prevent this happening, set `quit-flag' to nil
|
|
|
5146 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5147 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5148 an X frame.
|
|
|
5149 */ );
|
|
|
5150 Vinhibit_quit = Qnil;
|
|
|
5151
|
|
|
5152 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5153 *Non-nil means automatically display a backtrace buffer
|
|
|
5154 after any error that is not handled by a `condition-case'.
|
|
|
5155 If the value is a list, an error only means to display a backtrace
|
|
|
5156 if one of its condition symbols appears in the list.
|
|
|
5157 See also variable `stack-trace-on-signal'.
|
|
|
5158 */ );
|
|
|
5159 Vstack_trace_on_error = Qnil;
|
|
|
5160
|
|
|
5161 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5162 *Non-nil means automatically display a backtrace buffer
|
|
|
5163 after any error that is signalled, whether or not it is handled by
|
|
|
5164 a `condition-case'.
|
|
|
5165 If the value is a list, an error only means to display a backtrace
|
|
|
5166 if one of its condition symbols appears in the list.
|
|
|
5167 See also variable `stack-trace-on-error'.
|
|
|
5168 */ );
|
|
|
5169 Vstack_trace_on_signal = Qnil;
|
|
|
5170
|
|
163
|
5171 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5172 *List of errors for which the debugger should not be called.
|
|
|
5173 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5174 If any element applies to a given error, that error skips the debugger
|
|
|
5175 and just returns to top level.
|
|
|
5176 This overrides the variable `debug-on-error'.
|
|
|
5177 It does not apply to errors handled by `condition-case'.
|
|
|
5178 */ );
|
|
|
5179 Vdebug_ignored_errors = Qnil;
|
|
|
5180
|
|
0
|
5181 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5182 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5183 The debugger will not be entered if the error is handled by
|
|
|
5184 a `condition-case'.
|
|
|
5185 If the value is a list, an error only means to enter the debugger
|
|
|
5186 if one of its condition symbols appears in the list.
|
|
181
|
5187 This variable is overridden by `debug-ignored-errors'.
|
|
0
|
5188 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5189 */ );
|
|
|
5190 Vdebug_on_error = Qnil;
|
|
|
5191
|
|
|
5192 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5193 *Non-nil means enter debugger if an error is signalled.
|
|
|
5194 The debugger will be entered whether or not the error is handled by
|
|
|
5195 a `condition-case'.
|
|
|
5196 If the value is a list, an error only means to enter the debugger
|
|
|
5197 if one of its condition symbols appears in the list.
|
|
|
5198 See also variable `debug-on-quit'.
|
|
|
5199 */ );
|
|
|
5200 Vdebug_on_signal = Qnil;
|
|
|
5201
|
|
|
5202 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5203 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5204 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5205 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5206 control-shift-G to signal a critical quit.
|
|
|
5207 */ );
|
|
|
5208 debug_on_quit = 0;
|
|
|
5209
|
|
|
5210 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5211 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5212 */ );
|
|
|
5213
|
|
|
5214 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5215 Function to call to invoke debugger.
|
|
|
5216 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5217 this function's value will be returned instead of that.
|
|
|
5218 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5219 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5220 If due to `eval' entry, one arg, t.
|
|
|
5221 */ );
|
|
|
5222 Vdebugger = Qnil;
|
|
|
5223
|
|
|
5224 preparing_for_armageddon = 0;
|
|
|
5225
|
|
|
5226 staticpro (&Vpending_warnings);
|
|
|
5227 Vpending_warnings = Qnil;
|
|
|
5228 Vpending_warnings_tail = Qnil; /* no need to protect this */
|
|
|
5229
|
|
|
5230 in_warnings = 0;
|
|
|
5231
|
|
|
5232 staticpro (&Vautoload_queue);
|
|
|
5233 Vautoload_queue = Qnil;
|
|
|
5234
|
|
|
5235 staticpro (&Vcondition_handlers);
|
|
|
5236
|
|
|
5237 staticpro (&Vcurrent_warning_class);
|
|
|
5238 Vcurrent_warning_class = Qnil;
|
|
|
5239
|
|
|
5240 staticpro (&Vcurrent_error_state);
|
|
|
5241 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5242
|
|
|
5243 Qunbound_suspended_errors_tag = make_opaque_long (0);
|
|
|
5244 staticpro (&Qunbound_suspended_errors_tag);
|
|
|
5245
|
|
|
5246 specpdl_size = 50;
|
|
|
5247 specpdl_depth_counter = 0;
|
|
185
|
5248 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
0
|
5249 /* XEmacs change: increase these values. */
|
|
|
5250 max_specpdl_size = 3000;
|
|
|
5251 max_lisp_eval_depth = 500;
|
|
|
5252 throw_level = 0;
|
|
|
5253
|
|
|
5254 reinit_eval ();
|
|
|
5255 }
|
