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1 /* |
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2 |
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave 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 Octave 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 Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cassert> |
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28 #include <csetjmp> |
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29 #include <csignal> |
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30 #include <cstdlib> |
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31 #include <cstring> |
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32 #include <ctime> |
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33 |
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34 #include <string> |
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35 |
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36 #include <fstream.h> |
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37 #include <iostream.h> |
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38 #include <strstream.h> |
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39 |
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40 #ifdef HAVE_UNISTD_H |
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41 #include <sys/types.h> |
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42 #include <unistd.h> |
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43 #endif |
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44 |
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45 #include "lo-error.h" |
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46 #include "str-vec.h" |
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47 |
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48 #include "builtins.h" |
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49 #include "defaults.h" |
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50 #include "defun.h" |
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51 #include "dynamic-ld.h" |
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52 #include "error.h" |
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53 #include "file-io.h" |
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54 #include "help.h" |
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55 #include "input.h" |
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56 #include "lex.h" |
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57 #include "oct-hist.h" |
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58 #include "pager.h" |
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59 #include "parse.h" |
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60 #include "pathsearch.h" |
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61 #include "procstream.h" |
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62 #include "pt-const.h" |
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63 #include "pt-misc.h" |
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64 #include "pt-plot.h" |
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65 #include "sighandlers.h" |
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66 #include "sysdep.h" |
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67 #include "toplev.h" |
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68 #include "unwind-prot.h" |
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69 #include "user-prefs.h" |
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70 #include "utils.h" |
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71 #include "variables.h" |
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72 #include "version.h" |
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73 |
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74 // argv[0] for this program. |
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75 string raw_prog_name; |
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76 |
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77 // Cleaned-up name of this program, not including path information. |
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78 string prog_name; |
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79 |
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80 // Login name for user running this program. |
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81 string user_name; |
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82 |
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83 // Name of the host we are running on. |
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84 string host_name; |
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85 |
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86 // User's home directory. |
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87 string home_directory; |
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88 |
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89 // Guess what? |
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90 string the_current_working_directory; |
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91 |
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92 // The path that will be searched for programs that we execute. |
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93 // (--exec-path path) |
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94 string exec_path; |
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95 |
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96 // Load path specified on command line. |
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97 // (--path path; -p path) |
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98 string load_path; |
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99 |
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100 // Name of the info file specified on command line. |
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101 // (--info-file file) |
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102 string info_file; |
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103 |
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104 // Name of the info reader we'd like to use. |
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105 // (--info-program program) |
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106 string info_prog; |
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107 |
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108 // Name of the editor to be invoked by the edit_history command. |
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109 string editor; |
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110 |
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111 // Nonzero means we are using readline. |
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112 // (--no-line-editing) |
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113 #if defined (USE_READLINE) |
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114 int using_readline = 1; |
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115 #else |
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116 int using_readline = 0; |
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117 #endif |
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118 |
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119 // Nonzero means we printed messages about reading startup files. |
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120 int reading_startup_message_printed = 0; |
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121 |
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122 // Command number, counting from the beginning of this session. |
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123 int current_command_number = 1; |
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124 |
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125 // Nonzero means we are exiting via the builtin exit or quit functions. |
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126 int quitting_gracefully = 0; |
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127 |
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128 // Current command to execute. |
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129 tree_statement_list *global_command = 0; |
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130 |
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131 // Pointer to function that is currently being evaluated. |
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132 tree_function *curr_function = 0; |
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133 |
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134 // Nonzero means input is coming from startup file. |
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135 int input_from_startup_file = 0; |
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136 |
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137 // Nonzero means that input is coming from a file that was named on |
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138 // the command line. |
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139 int input_from_command_line_file = 1; |
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140 |
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141 // Top level context (?) |
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142 jmp_buf toplevel; |
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143 |
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144 void |
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145 parse_and_execute (FILE *f, int print) |
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146 { |
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147 begin_unwind_frame ("parse_and_execute"); |
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148 |
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149 YY_BUFFER_STATE old_buf = current_buffer (); |
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150 YY_BUFFER_STATE new_buf = create_buffer (f); |
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151 |
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152 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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153 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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154 |
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155 switch_to_buffer (new_buf); |
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156 |
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157 unwind_protect_int (using_readline); |
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158 unwind_protect_int (input_from_command_line_file); |
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159 |
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160 using_readline = 0; |
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161 input_from_command_line_file = 0; |
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162 |
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163 unwind_protect_ptr (curr_sym_tab); |
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164 |
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165 int retval; |
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166 do |
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167 { |
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168 reset_parser (); |
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169 |
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170 retval = yyparse (); |
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171 |
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172 if (retval == 0 && global_command) |
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173 { |
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174 global_command->eval (print); |
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175 delete global_command; |
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176 } |
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177 } |
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178 while (retval == 0); |
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179 |
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180 run_unwind_frame ("parse_and_execute"); |
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181 } |
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182 |
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183 void |
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184 parse_and_execute (const string& s, int print, int verbose, |
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185 const char *warn_for) |
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186 { |
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187 begin_unwind_frame ("parse_and_execute_2"); |
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188 |
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189 unwind_protect_int (reading_script_file); |
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190 unwind_protect_str (curr_fcn_file_full_name); |
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191 |
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192 reading_script_file = 1; |
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193 curr_fcn_file_full_name = s; |
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194 |
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195 FILE *f = get_input_from_file (s, 0); |
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196 |
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197 if (f) |
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198 { |
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199 unwind_protect_int (input_line_number); |
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200 unwind_protect_int (current_input_column); |
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201 |
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202 input_line_number = 0; |
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203 current_input_column = 1; |
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204 |
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205 if (verbose) |
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206 { |
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207 cout << "reading commands from " << s << " ... "; |
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208 reading_startup_message_printed = 1; |
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209 cout.flush (); |
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210 } |
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211 |
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212 parse_and_execute (f, print); |
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213 |
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214 fclose (f); |
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215 |
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216 if (verbose) |
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217 cout << "done." << endl; |
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218 } |
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219 else if (warn_for) |
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220 error ("%s: unable to open file `%s'", warn_for, s.c_str ()); |
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221 |
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222 run_unwind_frame ("parse_and_execute_2"); |
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223 } |
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224 |
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225 int |
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226 main_loop (void) |
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227 { |
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228 // Allow the user to interrupt us without exiting. |
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229 |
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230 octave_save_signal_mask (); |
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231 |
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232 if (setjmp (toplevel) != 0) |
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233 { |
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234 raw_mode (0); |
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235 |
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236 cout << "\n"; |
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237 |
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238 octave_restore_signal_mask (); |
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239 } |
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240 |
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241 can_interrupt = 1; |
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242 |
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243 catch_interrupts (); |
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244 |
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245 // The big loop. |
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246 |
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247 int retval; |
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248 do |
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249 { |
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250 curr_sym_tab = top_level_sym_tab; |
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251 |
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252 reset_parser (); |
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253 |
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254 retval = yyparse (); |
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255 |
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256 if (retval == 0 && global_command) |
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257 { |
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258 global_command->eval (1); |
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259 delete global_command; |
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260 current_command_number++; |
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261 } |
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262 } |
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263 while (retval == 0); |
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264 |
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265 return retval; |
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266 } |
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267 |
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268 DEFUN (source, args, , |
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269 "source (FILE)\n\ |
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270 \n\ |
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271 Parse and execute the contents of FILE. Like executing commands in a\n\ |
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272 script file but without requiring the file to be named `FILE.m'.") |
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273 { |
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274 octave_value_list retval; |
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275 |
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276 int nargin = args.length (); |
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277 |
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278 if (nargin == 1) |
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279 { |
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280 string file = args(0).string_value (); |
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281 |
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282 if (! error_state) |
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283 { |
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284 file = oct_tilde_expand (file); |
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285 |
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286 parse_and_execute (file, 1, 0, "source"); |
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287 |
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288 if (error_state) |
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289 error ("source: error sourcing file `%s'", file.c_str ()); |
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290 } |
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291 else |
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292 error ("source: expecting file name as argument"); |
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293 } |
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294 else |
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295 print_usage ("source"); |
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296 |
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297 return retval; |
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298 } |
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299 |
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300 // Fix up things before exiting. |
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301 |
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302 void |
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303 clean_up_and_exit (int retval) |
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304 { |
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305 raw_mode (0); |
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306 |
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307 octave_command_history.clean_up_and_save (); |
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308 |
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309 close_plot_stream (); |
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310 |
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311 close_files (); |
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312 |
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313 cleanup_tmp_files (); |
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314 |
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315 if (!quitting_gracefully && (interactive || forced_interactive)) |
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316 cout << "\n"; |
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317 |
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318 if (retval == EOF) |
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319 retval = 0; |
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320 |
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321 exit (retval); |
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322 |
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323 // This is bogus but should prevent g++ from giving a warning saying |
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324 // that this volatile function does return. |
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325 |
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326 panic_impossible (); |
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327 } |
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328 |
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1957
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329 DEFUN_TEXT (casesen, args, , |
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330 "casesen [on|off]") |
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331 { |
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332 octave_value_list retval; |
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333 |
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334 int argc = args.length () + 1; |
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335 |
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336 string_vector argv = args.make_argv ("casesen"); |
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337 |
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338 if (error_state) |
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339 return retval; |
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340 |
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341 if (argc == 1 || (argc > 1 && argv[1] == "off")) |
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342 warning ("casesen: sorry, Octave is always case sensitive"); |
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343 else if (argc > 1 && argv[1] == "on") |
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344 ; // ok. |
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345 else |
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346 print_usage ("casesen"); |
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347 |
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348 return retval; |
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349 } |
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350 |
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1957
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351 DEFUN (computer, args, nargout, |
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352 "computer ():\n\ |
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353 \n\ |
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354 Have Octave ask the system, \"What kind of computer are you?\"") |
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355 { |
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356 octave_value_list retval; |
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357 |
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358 int nargin = args.length (); |
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359 |
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360 if (nargin != 0) |
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361 warning ("computer: ignoring extra arguments"); |
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362 |
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363 string msg; |
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364 |
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365 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
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366 msg = "Hi Dave, I'm a HAL-9000"; |
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367 else |
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368 msg = TARGET_HOST_TYPE; |
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369 |
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370 if (nargout == 0) |
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371 octave_stdout << msg << "\n"; |
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372 else |
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373 retval = msg; |
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374 |
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375 return retval; |
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376 } |
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377 |
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378 DEFUN (quit, args, , |
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379 "quit (STATUS): exit Octave gracefully, returning STATUS to the system.\n\ |
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380 \n\ |
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381 STATUS should be an integer value. If STATUS is missing, 0 is assumed.") |
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382 { |
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383 octave_value_list retval; |
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384 |
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385 int exit_status = 0; |
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386 |
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387 quitting_gracefully = 1; |
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388 |
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389 int nargin = args.length (); |
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390 |
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391 if (nargin > 0) |
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392 { |
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393 // XXX FIXME XXX -- need a safe uniform way to do this. |
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394 |
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2068
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395 double tmp = args(0).double_value (); |
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396 |
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2068
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397 if (! error_state && ! xisnan (tmp)) |
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398 exit_status = NINT (tmp); |
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399 } |
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400 |
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401 clean_up_and_exit (exit_status); |
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402 |
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403 return retval; |
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404 } |
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405 |
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406 DEFALIAS (exit, quit); |
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407 |
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1957
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408 DEFUN (warranty, , , |
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409 "warranty (): describe copying conditions") |
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410 { |
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411 octave_value_list retval; |
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412 |
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413 octave_stdout << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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414 This program is free software; you can redistribute it and/or modify\n\ |
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415 it under the terms of the GNU General Public License as published by\n\ |
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416 the Free Software Foundation; either version 2 of the License, or\n\ |
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417 (at your option) any later version.\n\ |
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418 \n\ |
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419 This program is distributed in the hope that it will be useful,\n\ |
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420 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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421 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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422 GNU General Public License for more details.\n\ |
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423 \n\ |
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424 You should have received a copy of the GNU General Public License\n\ |
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425 along with this program. If not, write to the Free Software\n\ |
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426 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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427 \n"; |
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428 |
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429 return retval; |
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430 } |
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431 |
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432 // XXX FIXME XXX -- this may not be the best place for these... |
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433 |
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2086
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434 octave_value_list |
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435 feval (const octave_value_list& args, int nargout) |
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436 { |
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437 octave_value_list retval; |
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438 |
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439 tree_fvc *fcn = is_valid_function (args(0), "feval", 1); |
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440 if (fcn) |
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441 { |
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442 int tmp_nargin = args.length () - 1; |
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2086
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443 octave_value_list tmp_args; |
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444 tmp_args.resize (tmp_nargin); |
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445 for (int i = 0; i < tmp_nargin; i++) |
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446 tmp_args(i) = args(i+1); |
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447 retval = fcn->eval (0, nargout, tmp_args); |
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448 } |
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449 |
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450 return retval; |
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451 } |
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452 |
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1957
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453 DEFUN (feval, args, nargout, |
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454 "feval (NAME, ARGS, ...)\n\ |
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455 \n\ |
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456 evaluate NAME as a function, passing ARGS as its arguments") |
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457 { |
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458 octave_value_list retval; |
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459 |
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460 int nargin = args.length (); |
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461 |
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462 if (nargin > 0) |
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463 retval = feval (args, nargout); |
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464 else |
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465 print_usage ("feval"); |
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466 |
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467 return retval; |
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468 } |
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469 |
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2086
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470 static octave_value_list |
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1755
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471 eval_string (const string& s, int print, int& parse_status, |
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472 int nargout) |
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473 { |
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474 begin_unwind_frame ("eval_string"); |
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475 |
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476 unwind_protect_int (get_input_from_eval_string); |
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477 unwind_protect_int (input_from_command_line_file); |
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478 unwind_protect_ptr (global_command); |
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1755
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479 unwind_protect_str (current_eval_string); |
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1683
|
480 |
|
|
481 get_input_from_eval_string = 1; |
|
|
482 input_from_command_line_file = 0; |
|
1755
|
483 current_eval_string = s; |
|
1683
|
484 |
|
|
485 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
486 YY_BUFFER_STATE new_buf = create_buffer (0); |
|
|
487 |
|
|
488 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
|
|
489 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
|
|
490 |
|
|
491 switch_to_buffer (new_buf); |
|
|
492 |
|
|
493 unwind_protect_ptr (curr_sym_tab); |
|
|
494 |
|
|
495 reset_parser (); |
|
|
496 |
|
|
497 parse_status = yyparse (); |
|
|
498 |
|
|
499 // Important to reset the idea of where input is coming from before |
|
|
500 // trying to eval the command we just parsed -- it might contain the |
|
|
501 // name of an function file that still needs to be parsed! |
|
|
502 |
|
|
503 tree_statement_list *command = global_command; |
|
|
504 |
|
|
505 run_unwind_frame ("eval_string"); |
|
|
506 |
|
2086
|
507 octave_value_list retval; |
|
1683
|
508 |
|
|
509 if (parse_status == 0 && command) |
|
|
510 { |
|
|
511 retval = command->eval (print, nargout); |
|
|
512 delete command; |
|
|
513 } |
|
|
514 |
|
|
515 return retval; |
|
|
516 } |
|
|
517 |
|
2086
|
518 octave_value |
|
1755
|
519 eval_string (const string& s, int print, int& parse_status) |
|
1683
|
520 { |
|
2086
|
521 octave_value retval; |
|
1683
|
522 |
|
2086
|
523 octave_value_list tmp = eval_string (s, print, parse_status, 1); |
|
1683
|
524 |
|
|
525 retval = tmp(0); |
|
|
526 |
|
|
527 return retval; |
|
|
528 } |
|
|
529 |
|
2086
|
530 static octave_value_list |
|
|
531 eval_string (const octave_value& arg, int& parse_status, int nargout) |
|
1683
|
532 { |
|
1755
|
533 string s = arg.string_value (); |
|
1683
|
534 |
|
|
535 if (error_state) |
|
|
536 { |
|
|
537 error ("eval: expecting string argument"); |
|
|
538 return -1.0; |
|
|
539 } |
|
|
540 |
|
|
541 // Yes Virginia, we always print here... |
|
|
542 |
|
1755
|
543 return eval_string (s, 1, parse_status, nargout); |
|
1683
|
544 } |
|
|
545 |
|
1957
|
546 DEFUN (eval, args, nargout, |
|
1683
|
547 "eval (TRY, CATCH)\n\ |
|
|
548 \n\ |
|
|
549 Evaluate the string TRY as octave code. If that fails, evaluate the\n\ |
|
|
550 string CATCH.") |
|
|
551 { |
|
2086
|
552 octave_value_list retval; |
|
1683
|
553 |
|
|
554 int nargin = args.length (); |
|
|
555 |
|
|
556 if (nargin > 0) |
|
|
557 { |
|
|
558 begin_unwind_frame ("Feval"); |
|
|
559 |
|
|
560 if (nargin > 1) |
|
|
561 { |
|
|
562 unwind_protect_int (buffer_error_messages); |
|
|
563 buffer_error_messages = 1; |
|
|
564 } |
|
|
565 |
|
|
566 int parse_status = 0; |
|
|
567 |
|
|
568 retval = eval_string (args(0), parse_status, nargout); |
|
|
569 |
|
|
570 if (nargin > 1 && (parse_status != 0 || error_state)) |
|
|
571 { |
|
|
572 error_state = 0; |
|
|
573 |
|
|
574 // Set up for letting the user print any messages from |
|
|
575 // errors that occurred in the first part of this eval(). |
|
|
576 |
|
|
577 buffer_error_messages = 0; |
|
|
578 bind_global_error_variable (); |
|
|
579 add_unwind_protect (clear_global_error_variable, 0); |
|
|
580 |
|
|
581 eval_string (args(1), parse_status, nargout); |
|
|
582 |
|
2086
|
583 retval = octave_value_list (); |
|
1683
|
584 } |
|
|
585 |
|
|
586 run_unwind_frame ("Feval"); |
|
|
587 } |
|
|
588 else |
|
|
589 print_usage ("eval"); |
|
|
590 |
|
|
591 return retval; |
|
|
592 } |
|
|
593 |
|
|
594 // Execute a shell command. |
|
|
595 |
|
1965
|
596 static void |
|
|
597 cleanup_iprocstream (void *p) |
|
|
598 { |
|
|
599 delete (iprocstream *) p; |
|
|
600 } |
|
|
601 |
|
2086
|
602 static octave_value_list |
|
2083
|
603 do_system (const string& cmd_str, bool return_output) |
|
|
604 { |
|
2086
|
605 octave_value_list retval; |
|
2083
|
606 |
|
|
607 iprocstream *cmd = new iprocstream (cmd_str.c_str ()); |
|
|
608 |
|
|
609 add_unwind_protect (cleanup_iprocstream, cmd); |
|
|
610 |
|
|
611 int status = 127; |
|
|
612 |
|
|
613 if (cmd && *cmd) |
|
|
614 { |
|
|
615 ostrstream output_buf; |
|
2095
|
616 |
|
2083
|
617 char ch; |
|
|
618 while (cmd->get (ch)) |
|
2084
|
619 { |
|
2095
|
620 if (return_output) |
|
2084
|
621 output_buf.put (ch); |
|
2145
|
622 else |
|
2095
|
623 octave_stdout.put (ch); |
|
2084
|
624 } |
|
2083
|
625 |
|
|
626 status = cmd->close (); |
|
|
627 |
|
|
628 // The value in status is as returned by waitpid. If the |
|
|
629 // process exited normally, extract the actual exit status of |
|
|
630 // the command. Otherwise, return 127 as a failure code. |
|
|
631 |
|
|
632 if ((status & 0xff) == 0) |
|
|
633 status = (status & 0xff00) >> 8; |
|
|
634 |
|
|
635 if (return_output) |
|
|
636 { |
|
2145
|
637 output_buf << ends; |
|
|
638 |
|
2083
|
639 char *msg = output_buf.str (); |
|
|
640 |
|
|
641 retval(1) = (double) status; |
|
|
642 retval(0) = msg; |
|
|
643 |
|
|
644 delete [] msg; |
|
|
645 } |
|
|
646 } |
|
|
647 else |
|
|
648 error ("unable to start subprocess for `%s'", cmd_str.c_str ()); |
|
|
649 |
|
|
650 run_unwind_protect (); |
|
|
651 |
|
|
652 return retval; |
|
|
653 } |
|
|
654 |
|
1957
|
655 DEFUN (system, args, nargout, |
|
2083
|
656 "system (STRING [, RETURN_OUTPUT] [, TYPE])\n\ |
|
|
657 \n\ |
|
|
658 Execute the shell command specified by STRING.\n\ |
|
|
659 \n\ |
|
|
660 If TYPE is \"async\", the process is started in the background and the\n\ |
|
|
661 pid of the child proces is returned immediately. Otherwise, the\n\ |
|
|
662 process is started, and Octave waits until it exits. If TYPE argument\n\ |
|
|
663 is omitted, a value of \"sync\" is assumed.\n\ |
|
|
664 \n\ |
|
|
665 If NARGIN == 2 (the actual value of RETURN_OUTPUT is irrelevant) and\n\ |
|
|
666 the subprocess is started synchronously, or if system() is called with\n\ |
|
|
667 NARGIN == 1 and NARGOUT > 0, the output from the command is returned.\n\ |
|
|
668 Otherwise, if the subprocess is executed synchronously, it's output is\n\ |
|
|
669 sent to Octave's standard output (possibly being passed through the\n\ |
|
|
670 pager).") |
|
1683
|
671 { |
|
2086
|
672 octave_value_list retval; |
|
1683
|
673 |
|
|
674 int nargin = args.length (); |
|
|
675 |
|
2083
|
676 if (nargin > 0 && nargin < 4) |
|
1683
|
677 { |
|
2083
|
678 bool return_output = (nargout > 0 || nargin > 1); |
|
|
679 |
|
|
680 string cmd_str = args(0).string_value (); |
|
|
681 |
|
|
682 enum exec_type { sync, async }; |
|
|
683 |
|
|
684 exec_type type = sync; |
|
|
685 |
|
|
686 if (! error_state) |
|
|
687 { |
|
|
688 if (nargin > 2) |
|
|
689 { |
|
|
690 string type_str = args(2).string_value (); |
|
1683
|
691 |
|
2083
|
692 if (! error_state) |
|
|
693 { |
|
|
694 if (type_str == "sync") |
|
|
695 type = sync; |
|
|
696 else if (type_str == "async") |
|
|
697 type = async; |
|
|
698 else |
|
|
699 error ("system: third arg must be \"sync\" or \"async\""); |
|
|
700 } |
|
|
701 else |
|
|
702 error ("system: third argument must be a string"); |
|
|
703 } |
|
|
704 } |
|
|
705 else |
|
|
706 error ("system: expecting string as first argument"); |
|
1683
|
707 |
|
2083
|
708 if (! error_state) |
|
|
709 { |
|
|
710 if (type == async) |
|
|
711 { |
|
|
712 pid_t pid = fork (); |
|
|
713 |
|
|
714 if (pid < 0) |
|
|
715 error ("system: fork failed -- can't create child process"); |
|
|
716 else if (pid == 0) |
|
|
717 { |
|
|
718 system (cmd_str.c_str ()); |
|
|
719 exit (0); |
|
|
720 retval(0) = 0.0; |
|
|
721 } |
|
|
722 else |
|
|
723 retval(0) = (double) pid; |
|
|
724 } |
|
|
725 else |
|
|
726 retval = do_system (cmd_str, return_output); |
|
|
727 } |
|
1683
|
728 } |
|
|
729 else |
|
2083
|
730 print_usage ("system"); |
|
1683
|
731 |
|
|
732 return retval; |
|
|
733 } |
|
|
734 |
|
|
735 DEFALIAS (shell_cmd, system); |
|
|
736 |
|
2077
|
737 static SLStack<string> octave_atexit_functions; |
|
|
738 |
|
|
739 void |
|
|
740 do_octave_atexit (void) |
|
|
741 { |
|
|
742 while (! octave_atexit_functions.empty ()) |
|
|
743 { |
|
2086
|
744 octave_value_list fcn = octave_atexit_functions.pop (); |
|
2077
|
745 |
|
|
746 feval (fcn, 0); |
|
|
747 } |
|
|
748 } |
|
|
749 |
|
|
750 DEFUN(atexit, args, , |
|
|
751 "atexit (NAME): register NAME as a function to call when Octave exits\n\ |
|
|
752 \n\ |
|
|
753 Functions are called with no arguments in the reverse of the order in |
|
|
754 which they were registered with atexit()") |
|
|
755 { |
|
2086
|
756 octave_value_list retval; |
|
2077
|
757 |
|
|
758 #if defined (HAVE_ATEXIT) || defined (HAVE_ON_EXIT) |
|
|
759 int nargin = args.length (); |
|
|
760 |
|
|
761 if (nargin == 1) |
|
|
762 { |
|
|
763 string arg = args(0).string_value (); |
|
|
764 |
|
|
765 if (! error_state) |
|
|
766 octave_atexit_functions.push (arg); |
|
|
767 else |
|
|
768 error ("atexit: argument must be a string"); |
|
|
769 } |
|
|
770 else |
|
|
771 print_usage ("atexit"); |
|
|
772 #else |
|
2078
|
773 gripe_not_supported ("atexit"); |
|
2077
|
774 #endif |
|
|
775 |
|
|
776 return retval; |
|
|
777 } |
|
|
778 |
|
1683
|
779 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
|
|
780 int debug_new_delete = 0; |
|
|
781 |
|
|
782 typedef void (*vfp)(void); |
|
|
783 extern vfp __new_handler; |
|
|
784 |
|
|
785 void * |
|
|
786 __builtin_new (size_t sz) |
|
|
787 { |
|
|
788 void *p; |
|
|
789 |
|
|
790 /* malloc (0) is unpredictable; avoid it. */ |
|
|
791 if (sz == 0) |
|
|
792 sz = 1; |
|
|
793 p = (void *) malloc (sz); |
|
|
794 while (p == 0) |
|
|
795 { |
|
|
796 (*__new_handler) (); |
|
|
797 p = (void *) malloc (sz); |
|
|
798 } |
|
|
799 |
|
|
800 if (debug_new_delete) |
|
|
801 cout << "__builtin_new: " << p << endl; |
|
|
802 |
|
|
803 return p; |
|
|
804 } |
|
|
805 |
|
|
806 void |
|
|
807 __builtin_delete (void *ptr) |
|
|
808 { |
|
|
809 if (debug_new_delete) |
|
|
810 cout << "__builtin_delete: " << ptr << endl; |
|
|
811 |
|
|
812 if (ptr) |
|
|
813 free (ptr); |
|
|
814 } |
|
|
815 #endif |
|
|
816 |
|
|
817 /* |
|
|
818 ;;; Local Variables: *** |
|
|
819 ;;; mode: C++ *** |
|
|
820 ;;; End: *** |
|
|
821 */ |
