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1683
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1 // toplev.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cassert> |
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29 #include <csetjmp> |
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30 #include <csignal> |
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31 #include <cstdlib> |
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32 #include <cstring> |
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33 #include <ctime> |
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34 |
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35 #include <fstream.h> |
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36 #include <iostream.h> |
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37 #include <strstream.h> |
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38 |
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39 #ifdef HAVE_UNISTD_H |
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40 #include <sys/types.h> |
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41 #include <unistd.h> |
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42 #endif |
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43 |
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44 #include <pwd.h> |
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45 |
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46 #include <readline/tilde.h> |
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47 |
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48 #include "lo-error.h" |
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49 |
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50 #include "builtins.h" |
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51 #include "defaults.h" |
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52 #include "defun.h" |
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53 #include "dynamic-ld.h" |
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54 #include "error.h" |
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55 #include "file-io.h" |
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56 #include "help.h" |
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57 #include "input.h" |
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58 #include "lex.h" |
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59 #include "octave-hist.h" |
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60 #include "toplev.h" |
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61 #include "pager.h" |
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62 #include "parse.h" |
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63 #include "pathsearch.h" |
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64 #include "procstream.h" |
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65 #include "sighandlers.h" |
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66 #include "statdefs.h" |
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67 #include "sysdep.h" |
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68 #include "tree-const.h" |
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69 #include "tree-misc.h" |
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70 #include "tree-plot.h" |
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71 #include "unwind-prot.h" |
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72 #include "user-prefs.h" |
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73 #include "utils.h" |
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74 #include "variables.h" |
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75 #include "version.h" |
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76 |
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77 #if !defined (HAVE_ATEXIT) && defined (HAVE_ON_EXIT) |
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78 extern "C" int on_exit (); |
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79 #define atexit on_exit |
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80 #endif |
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81 |
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82 // argv[0] for this program. |
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83 char *raw_prog_name = 0; |
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84 |
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85 // Cleaned-up name of this program, not including path information. |
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86 char *prog_name = 0; |
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87 |
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88 // Login name for user running this program. |
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89 char *user_name = 0; |
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90 |
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91 // Name of the host we are running on. |
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92 char *host_name = 0; |
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93 |
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94 // User's home directory. |
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95 char *home_directory = 0; |
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96 |
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97 // Guess what? |
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98 char *the_current_working_directory = 0; |
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99 |
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100 // The path that will be searched for programs that we execute. |
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101 // (--exec-path path) |
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102 char *exec_path = 0; |
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103 |
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104 // Load path specified on command line. |
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105 // (--path path; -p path) |
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106 char *load_path = 0; |
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107 |
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108 // Name of the info file specified on command line. |
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109 // (--info-file file) |
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110 char *info_file = 0; |
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111 |
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112 // Name of the info reader we'd like to use. |
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113 // (--info-program program) |
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114 char *info_prog = 0; |
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115 |
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116 // Name of the editor to be invoked by the edit_history command. |
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117 char *editor = 0; |
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118 |
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119 // If nonzero, don't do fancy line editing. |
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120 int no_line_editing = 0; |
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121 |
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122 // If nonzero, print verbose info in some cases. |
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123 // (--verbose; -V) |
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124 int verbose_flag = 0; |
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125 |
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126 // Nonzero means we printed messages about reading startup files. |
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127 int reading_startup_message_printed = 0; |
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128 |
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129 // Command number, counting from the beginning of this session. |
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130 int current_command_number = 1; |
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131 |
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132 // Nonzero means we are exiting via the builtin exit or quit functions. |
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133 int quitting_gracefully = 0; |
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134 |
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135 // Current command to execute. |
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136 tree_statement_list *global_command = 0; |
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137 |
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138 // Pointer to function that is currently being evaluated. |
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139 tree_function *curr_function = 0; |
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140 |
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141 // Nonzero means input is coming from startup file. |
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142 int input_from_startup_file = 0; |
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143 |
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144 // The command-line options. |
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145 charMatrix octave_argv; |
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146 |
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147 // Nonzero means that input is coming from a file that was named on |
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148 // the command line. |
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149 int input_from_command_line_file = 1; |
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150 |
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151 void |
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152 parse_and_execute (FILE *f, int print) |
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153 { |
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154 begin_unwind_frame ("parse_and_execute"); |
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155 |
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156 YY_BUFFER_STATE old_buf = current_buffer (); |
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157 YY_BUFFER_STATE new_buf = create_buffer (f); |
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158 |
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159 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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160 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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161 |
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162 switch_to_buffer (new_buf); |
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163 |
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164 unwind_protect_int (using_readline); |
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165 unwind_protect_int (input_from_command_line_file); |
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166 |
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167 using_readline = 0; |
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168 input_from_command_line_file = 0; |
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169 |
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170 unwind_protect_ptr (curr_sym_tab); |
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171 |
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172 int retval; |
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173 do |
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174 { |
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175 reset_parser (); |
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176 |
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177 retval = yyparse (); |
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178 |
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179 if (retval == 0 && global_command) |
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180 { |
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181 global_command->eval (print); |
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182 delete global_command; |
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183 } |
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184 } |
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185 while (retval == 0); |
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186 |
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187 run_unwind_frame ("parse_and_execute"); |
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188 } |
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189 |
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190 void |
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191 parse_and_execute (const char *s, int print, int verbose, |
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192 const char *warn_for) |
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193 { |
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194 begin_unwind_frame ("parse_and_execute_2"); |
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195 |
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196 unwind_protect_int (reading_script_file); |
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197 unwind_protect_ptr (curr_fcn_file_full_name); |
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198 |
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199 reading_script_file = 1; |
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200 curr_fcn_file_full_name = s; |
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201 |
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202 FILE *f = get_input_from_file (s, 0); |
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203 if (f) |
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204 { |
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205 unwind_protect_int (input_line_number); |
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206 unwind_protect_int (current_input_column); |
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207 |
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208 input_line_number = 0; |
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209 current_input_column = 1; |
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210 |
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211 if (verbose) |
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212 { |
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213 cout << "reading commands from " << s << " ... "; |
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214 reading_startup_message_printed = 1; |
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215 cout.flush (); |
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216 } |
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217 |
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218 parse_and_execute (f, print); |
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219 |
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220 fclose (f); |
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221 |
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222 if (verbose) |
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223 cout << "done." << endl; |
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224 } |
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225 else if (warn_for) |
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226 error ("%s: unable to open file `%s'", warn_for, s); |
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227 |
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228 run_unwind_frame ("parse_and_execute_2"); |
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229 } |
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230 |
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231 DEFUN ("source", Fsource, Ssource, 10, |
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232 "source (FILE)\n\ |
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233 \n\ |
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234 Parse and execute the contents of FILE. Like executing commands in a\n\ |
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235 script file but without requiring the file to be named `FILE.m'.") |
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236 { |
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237 Octave_object retval; |
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238 |
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239 int nargin = args.length (); |
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240 |
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241 if (nargin == 1) |
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242 { |
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243 const char *file = args(0).string_value (); |
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244 |
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245 if (! error_state) |
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246 { |
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247 file = tilde_expand (file); |
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248 |
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249 parse_and_execute (file, 1, 0, "source"); |
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250 |
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251 if (error_state) |
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252 error ("source: error sourcing file `%s'", file); |
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253 |
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254 delete [] file; |
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255 } |
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256 else |
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257 error ("source: expecting file name as argument"); |
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258 } |
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259 else |
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260 print_usage ("source"); |
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261 |
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262 return retval; |
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263 } |
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264 |
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265 // Fix up things before exiting. |
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266 |
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267 void |
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268 clean_up_and_exit (int retval) |
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269 { |
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270 raw_mode (0); |
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271 |
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272 clean_up_history (); |
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273 |
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274 close_plot_stream (); |
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275 |
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276 close_diary_file (); |
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277 |
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278 close_files (); |
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279 |
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280 cleanup_tmp_files (); |
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281 |
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282 if (!quitting_gracefully && (interactive || forced_interactive)) |
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283 cout << "\n"; |
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284 |
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285 if (retval == EOF) |
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286 retval = 0; |
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287 |
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288 exit (retval); |
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289 |
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290 // This is bogus but should prevent g++ from giving a warning saying |
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291 // that this volatile function does return. |
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292 |
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293 panic_impossible (); |
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294 } |
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295 |
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296 DEFUN_TEXT ("casesen", Fcasesen, Scasesen, 10, |
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297 "casesen [on|off]") |
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298 { |
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299 Octave_object retval; |
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300 |
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301 DEFINE_ARGV("casesen"); |
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302 |
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303 if (argc == 1 || (argc > 1 && strcmp (argv[1], "off") == 0)) |
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304 warning ("casesen: sorry, Octave is always case sensitive"); |
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305 else if (argc > 1 && strcmp (argv[1], "on") == 0) |
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306 ; // ok. |
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307 else |
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308 print_usage ("casesen"); |
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309 |
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310 DELETE_ARGV; |
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311 |
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312 return retval; |
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313 } |
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314 |
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315 DEFUN ("computer", Fcomputer, Scomputer, 11, |
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316 "computer ():\n\ |
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317 \n\ |
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318 Have Octave ask the system, \"What kind of computer are you?\"") |
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319 { |
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320 Octave_object retval; |
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321 |
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322 int nargin = args.length (); |
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323 |
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324 if (nargin != 0) |
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325 warning ("computer: ignoring extra arguments"); |
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326 |
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327 ostrstream output_buf; |
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328 |
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329 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
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330 output_buf << "Hi Dave, I'm a HAL-9000"; |
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331 else |
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332 output_buf << TARGET_HOST_TYPE; |
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333 |
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334 if (nargout == 0) |
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335 { |
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336 output_buf << "\n" << ends; |
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337 maybe_page_output (output_buf); |
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338 } |
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339 else |
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340 { |
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341 output_buf << ends; |
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342 char *msg = output_buf.str (); |
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343 retval = msg; |
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344 delete [] msg; |
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345 } |
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346 |
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347 return retval; |
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348 } |
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349 |
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350 DEFUN ("flops", Fflops, Sflops, 10, |
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351 "flops (): count floating point operations") |
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352 { |
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353 int nargin = args.length (); |
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354 |
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355 if (nargin > 0) |
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356 print_usage ("flops"); |
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357 |
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358 warning ("flops is a flop, always returning zero"); |
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359 |
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360 return 0.0; |
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361 } |
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362 |
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363 DEFUN ("quit", Fquit, Squit, 00, |
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364 "quit (): exit Octave gracefully") |
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365 { |
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366 Octave_object retval; |
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367 quitting_gracefully = 1; |
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368 clean_up_and_exit (0); |
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369 return retval; |
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370 } |
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371 |
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372 DEFALIAS (exit, quit); |
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373 |
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374 DEFUN ("warranty", Fwarranty, Swarranty, 00, |
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375 "warranty (): describe copying conditions") |
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376 { |
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377 Octave_object retval; |
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378 |
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379 ostrstream output_buf; |
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380 output_buf << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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381 This program is free software; you can redistribute it and/or modify\n\ |
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382 it under the terms of the GNU General Public License as published by\n\ |
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383 the Free Software Foundation; either version 2 of the License, or\n\ |
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384 (at your option) any later version.\n\ |
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385 \n\ |
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386 This program is distributed in the hope that it will be useful,\n\ |
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387 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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388 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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389 GNU General Public License for more details.\n\ |
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390 \n\ |
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391 You should have received a copy of the GNU General Public License\n\ |
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392 along with this program. If not, write to the Free Software\n\ |
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393 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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394 \n"; |
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395 |
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396 output_buf << ends; |
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397 maybe_page_output (output_buf); |
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398 |
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399 return retval; |
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400 } |
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401 |
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402 // XXX FIXME XXX -- this may not be the best place for these... |
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403 |
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404 Octave_object |
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405 feval (const Octave_object& args, int nargout) |
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406 { |
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407 Octave_object retval; |
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408 |
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409 tree_fvc *fcn = is_valid_function (args(0), "feval", 1); |
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410 if (fcn) |
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411 { |
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412 int tmp_nargin = args.length () - 1; |
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413 Octave_object tmp_args; |
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414 tmp_args.resize (tmp_nargin); |
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415 for (int i = 0; i < tmp_nargin; i++) |
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416 tmp_args(i) = args(i+1); |
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417 retval = fcn->eval (0, nargout, tmp_args); |
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418 } |
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419 |
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420 return retval; |
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421 } |
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422 |
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423 DEFUN ("feval", Ffeval, Sfeval, 11, |
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424 "feval (NAME, ARGS, ...)\n\ |
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425 \n\ |
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426 evaluate NAME as a function, passing ARGS as its arguments") |
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427 { |
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428 Octave_object retval; |
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429 |
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430 int nargin = args.length (); |
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431 |
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432 if (nargin > 0) |
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433 retval = feval (args, nargout); |
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434 else |
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435 print_usage ("feval"); |
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436 |
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437 return retval; |
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438 } |
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439 |
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440 static Octave_object |
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441 eval_string (const char *string, int print, int& parse_status, |
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442 int nargout) |
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443 { |
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444 begin_unwind_frame ("eval_string"); |
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445 |
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446 unwind_protect_int (get_input_from_eval_string); |
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447 unwind_protect_int (input_from_command_line_file); |
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448 unwind_protect_ptr (global_command); |
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449 unwind_protect_ptr (current_eval_string); |
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450 |
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451 get_input_from_eval_string = 1; |
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452 input_from_command_line_file = 0; |
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453 current_eval_string = string; |
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454 |
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455 YY_BUFFER_STATE old_buf = current_buffer (); |
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456 YY_BUFFER_STATE new_buf = create_buffer (0); |
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457 |
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458 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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459 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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460 |
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461 switch_to_buffer (new_buf); |
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462 |
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463 unwind_protect_ptr (curr_sym_tab); |
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464 |
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465 reset_parser (); |
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466 |
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467 parse_status = yyparse (); |
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468 |
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469 // Important to reset the idea of where input is coming from before |
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470 // trying to eval the command we just parsed -- it might contain the |
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471 // name of an function file that still needs to be parsed! |
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472 |
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473 tree_statement_list *command = global_command; |
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474 |
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475 run_unwind_frame ("eval_string"); |
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476 |
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477 Octave_object retval; |
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478 |
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479 if (parse_status == 0 && command) |
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480 { |
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481 retval = command->eval (print, nargout); |
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482 delete command; |
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483 } |
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484 |
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485 return retval; |
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486 } |
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487 |
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488 tree_constant |
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489 eval_string (const char *string, int print, int& parse_status) |
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490 { |
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491 tree_constant retval; |
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492 |
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493 Octave_object tmp = eval_string (string, print, parse_status, 1); |
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494 |
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495 retval = tmp(0); |
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496 |
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497 return retval; |
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498 } |
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499 |
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500 static Octave_object |
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501 eval_string (const tree_constant& arg, int& parse_status, int nargout) |
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502 { |
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503 const char *string = arg.string_value (); |
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504 |
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505 if (error_state) |
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506 { |
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507 error ("eval: expecting string argument"); |
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508 return -1.0; |
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509 } |
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510 |
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511 // Yes Virginia, we always print here... |
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512 |
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513 return eval_string (string, 1, parse_status, nargout); |
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514 } |
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515 |
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516 DEFUN ("eval", Feval, Seval, 11, |
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517 "eval (TRY, CATCH)\n\ |
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518 \n\ |
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519 Evaluate the string TRY as octave code. If that fails, evaluate the\n\ |
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520 string CATCH.") |
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521 { |
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522 Octave_object retval; |
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523 |
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524 int nargin = args.length (); |
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525 |
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526 if (nargin > 0) |
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527 { |
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528 begin_unwind_frame ("Feval"); |
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529 |
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530 if (nargin > 1) |
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531 { |
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532 unwind_protect_int (buffer_error_messages); |
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533 buffer_error_messages = 1; |
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534 } |
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535 |
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536 int parse_status = 0; |
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537 |
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538 retval = eval_string (args(0), parse_status, nargout); |
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539 |
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540 if (nargin > 1 && (parse_status != 0 || error_state)) |
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541 { |
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542 error_state = 0; |
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543 |
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544 // Set up for letting the user print any messages from |
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545 // errors that occurred in the first part of this eval(). |
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546 |
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547 buffer_error_messages = 0; |
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548 bind_global_error_variable (); |
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549 add_unwind_protect (clear_global_error_variable, 0); |
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550 |
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551 eval_string (args(1), parse_status, nargout); |
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552 |
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553 retval = Octave_object (); |
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554 } |
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555 |
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556 run_unwind_frame ("Feval"); |
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557 } |
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558 else |
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559 print_usage ("eval"); |
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560 |
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561 return retval; |
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562 } |
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563 |
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564 // Execute a shell command. |
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565 |
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566 DEFUN ("system", Fsystem, Ssystem, 11, |
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567 "system (string [, return_output]): execute shell commands") |
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568 { |
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569 Octave_object retval; |
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570 |
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571 int nargin = args.length (); |
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572 |
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573 if (nargin < 1 || nargin > 2) |
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574 { |
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575 print_usage ("system"); |
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576 return retval; |
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577 } |
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578 |
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579 tree_constant tc_command = args(0); |
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580 |
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581 const char *tmp_str = tc_command.string_value (); |
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582 |
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583 if (error_state) |
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584 { |
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585 error ("system: expecting string as first argument"); |
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586 } |
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587 else |
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588 { |
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589 iprocstream *cmd = new iprocstream (tmp_str); |
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590 |
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591 add_unwind_protect (cleanup_iprocstream, cmd); |
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592 |
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593 int status = 127; |
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594 |
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595 if (cmd && *cmd) |
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596 { |
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597 ostrstream output_buf; |
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598 |
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599 char ch; |
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600 while (cmd->get (ch)) |
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601 output_buf.put (ch); |
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602 |
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603 output_buf << ends; |
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604 |
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605 status = cmd->close (); |
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606 |
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607 // The value in status is as returned by waitpid. If the |
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608 // process exited normally, extract the actual exit status of |
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609 // the command. Otherwise, return 127 as a failure code. |
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610 |
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611 if ((status & 0xff) == 0) |
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612 status = (status & 0xff00) >> 8; |
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613 |
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614 if (nargout > 0 || nargin > 1) |
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615 { |
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616 char *msg = output_buf.str (); |
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617 |
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618 retval(1) = (double) status; |
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619 retval(0) = msg; |
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620 |
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621 delete [] msg; |
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622 } |
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623 else |
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624 maybe_page_output (output_buf); |
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625 } |
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626 else |
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627 error ("unable to start subprocess for `%s'", tmp_str); |
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628 |
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629 run_unwind_protect (); |
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630 } |
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631 |
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632 return retval; |
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633 } |
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634 |
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635 DEFALIAS (shell_cmd, system); |
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636 |
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637 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
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638 int debug_new_delete = 0; |
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639 |
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640 typedef void (*vfp)(void); |
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641 extern vfp __new_handler; |
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642 |
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643 void * |
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644 __builtin_new (size_t sz) |
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645 { |
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646 void *p; |
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647 |
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648 /* malloc (0) is unpredictable; avoid it. */ |
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649 if (sz == 0) |
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650 sz = 1; |
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651 p = (void *) malloc (sz); |
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652 while (p == 0) |
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653 { |
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654 (*__new_handler) (); |
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655 p = (void *) malloc (sz); |
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656 } |
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657 |
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658 if (debug_new_delete) |
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659 cout << "__builtin_new: " << p << endl; |
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660 |
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661 return p; |
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662 } |
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663 |
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664 void |
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665 __builtin_delete (void *ptr) |
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666 { |
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667 if (debug_new_delete) |
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668 cout << "__builtin_delete: " << ptr << endl; |
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669 |
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670 if (ptr) |
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671 free (ptr); |
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672 } |
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673 #endif |
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674 |
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675 /* |
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676 ;;; Local Variables: *** |
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677 ;;; mode: C++ *** |
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678 ;;; page-delimiter: "^/\\*" *** |
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679 ;;; End: *** |
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680 */ |
