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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 <string> |
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36 |
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37 #include <fstream.h> |
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38 #include <iostream.h> |
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39 #include <strstream.h> |
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40 |
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41 #ifdef HAVE_UNISTD_H |
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42 #include <sys/types.h> |
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43 #include <unistd.h> |
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44 #endif |
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45 |
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46 #include "lo-error.h" |
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47 #include "str-vec.h" |
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48 |
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49 #include "builtins.h" |
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50 #include "defaults.h" |
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51 #include "defun.h" |
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52 #include "dynamic-ld.h" |
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53 #include "error.h" |
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54 #include "file-io.h" |
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55 #include "help.h" |
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56 #include "input.h" |
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57 #include "lex.h" |
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58 #include "oct-hist.h" |
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59 #include "pager.h" |
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60 #include "parse.h" |
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61 #include "pathsearch.h" |
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62 #include "procstream.h" |
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63 #include "pt-const.h" |
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64 #include "pt-misc.h" |
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65 #include "pt-plot.h" |
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66 #include "sighandlers.h" |
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67 #include "sysdep.h" |
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68 #include "toplev.h" |
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69 #include "unwind-prot.h" |
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70 #include "user-prefs.h" |
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71 #include "utils.h" |
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72 #include "variables.h" |
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73 #include "version.h" |
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74 |
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75 // argv[0] for this program. |
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76 string raw_prog_name; |
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77 |
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78 // Cleaned-up name of this program, not including path information. |
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79 string prog_name; |
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80 |
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81 // Login name for user running this program. |
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82 string user_name; |
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83 |
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84 // Name of the host we are running on. |
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85 string host_name; |
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86 |
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87 // User's home directory. |
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88 string home_directory; |
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89 |
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90 // Guess what? |
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91 string the_current_working_directory; |
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92 |
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93 // The path that will be searched for programs that we execute. |
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94 // (--exec-path path) |
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95 string exec_path; |
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96 |
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97 // Load path specified on command line. |
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98 // (--path path; -p path) |
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99 string load_path; |
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100 |
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101 // Name of the info file specified on command line. |
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102 // (--info-file file) |
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103 string info_file; |
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104 |
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105 // Name of the info reader we'd like to use. |
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106 // (--info-program program) |
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107 string info_prog; |
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108 |
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109 // Name of the editor to be invoked by the edit_history command. |
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110 string editor; |
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111 |
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112 // If nonzero, don't do fancy line editing. |
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113 int no_line_editing = 0; |
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114 |
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115 // If nonzero, print verbose info in some cases. |
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116 // (--verbose; -V) |
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117 int verbose_flag = 0; |
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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 // The command-line options. |
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138 charMatrix octave_argv; |
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139 |
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140 // Nonzero means that input is coming from a file that was named on |
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141 // the command line. |
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142 int input_from_command_line_file = 1; |
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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 DEFUN ("source", Fsource, Ssource, 10, |
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226 "source (FILE)\n\ |
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227 \n\ |
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228 Parse and execute the contents of FILE. Like executing commands in a\n\ |
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229 script file but without requiring the file to be named `FILE.m'.") |
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230 { |
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231 Octave_object retval; |
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232 |
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233 int nargin = args.length (); |
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234 |
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235 if (nargin == 1) |
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236 { |
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237 string file = args(0).string_value (); |
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238 |
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239 if (! error_state) |
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240 { |
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241 file = oct_tilde_expand (file); |
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242 |
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243 parse_and_execute (file, 1, 0, "source"); |
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244 |
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245 if (error_state) |
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246 error ("source: error sourcing file `%s'", file.c_str ()); |
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247 } |
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248 else |
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249 error ("source: expecting file name as argument"); |
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250 } |
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251 else |
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252 print_usage ("source"); |
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253 |
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254 return retval; |
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255 } |
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256 |
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257 // Fix up things before exiting. |
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258 |
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259 void |
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260 clean_up_and_exit (int retval) |
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261 { |
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262 raw_mode (0); |
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263 |
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264 octave_command_history.clean_up_and_save (); |
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265 |
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266 close_plot_stream (); |
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267 |
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268 close_diary_file (); |
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269 |
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270 close_files (); |
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271 |
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272 cleanup_tmp_files (); |
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273 |
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274 if (!quitting_gracefully && (interactive || forced_interactive)) |
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275 cout << "\n"; |
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276 |
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277 if (retval == EOF) |
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278 retval = 0; |
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279 |
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280 exit (retval); |
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281 |
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282 // This is bogus but should prevent g++ from giving a warning saying |
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283 // that this volatile function does return. |
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284 |
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285 panic_impossible (); |
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286 } |
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287 |
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288 DEFUN_TEXT ("casesen", Fcasesen, Scasesen, 10, |
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289 "casesen [on|off]") |
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290 { |
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291 Octave_object retval; |
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292 |
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293 int argc = args.length () + 1; |
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294 |
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295 string_vector argv = make_argv (args, "casesen"); |
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296 |
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297 if (error_state) |
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298 return retval; |
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299 |
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300 if (argc == 1 || (argc > 1 && argv[1] == "off")) |
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301 warning ("casesen: sorry, Octave is always case sensitive"); |
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302 else if (argc > 1 && argv[1] == "on") |
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303 ; // ok. |
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304 else |
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305 print_usage ("casesen"); |
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306 |
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307 return retval; |
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308 } |
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309 |
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310 DEFUN ("computer", Fcomputer, Scomputer, 11, |
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311 "computer ():\n\ |
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312 \n\ |
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313 Have Octave ask the system, \"What kind of computer are you?\"") |
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314 { |
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315 Octave_object retval; |
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316 |
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317 int nargin = args.length (); |
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318 |
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319 if (nargin != 0) |
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320 warning ("computer: ignoring extra arguments"); |
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321 |
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322 ostrstream output_buf; |
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323 |
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324 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
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325 output_buf << "Hi Dave, I'm a HAL-9000"; |
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326 else |
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327 output_buf << TARGET_HOST_TYPE; |
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328 |
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329 if (nargout == 0) |
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330 { |
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331 output_buf << "\n" << ends; |
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332 maybe_page_output (output_buf); |
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333 } |
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334 else |
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335 { |
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336 output_buf << ends; |
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337 char *msg = output_buf.str (); |
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338 retval = msg; |
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339 delete [] msg; |
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340 } |
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341 |
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342 return retval; |
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343 } |
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344 |
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345 DEFUN ("flops", Fflops, Sflops, 10, |
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346 "flops (): count floating point operations") |
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347 { |
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348 int nargin = args.length (); |
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349 |
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350 if (nargin > 0) |
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351 print_usage ("flops"); |
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352 |
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353 warning ("flops is a flop, always returning zero"); |
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354 |
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355 return 0.0; |
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356 } |
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357 |
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358 DEFUN ("quit", Fquit, Squit, 00, |
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359 "quit (): exit Octave gracefully") |
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360 { |
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361 Octave_object retval; |
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362 quitting_gracefully = 1; |
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363 clean_up_and_exit (0); |
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364 return retval; |
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365 } |
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366 |
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367 DEFALIAS (exit, quit); |
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368 |
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369 DEFUN ("warranty", Fwarranty, Swarranty, 00, |
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370 "warranty (): describe copying conditions") |
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371 { |
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372 Octave_object retval; |
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373 |
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374 ostrstream output_buf; |
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375 output_buf << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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376 This program is free software; you can redistribute it and/or modify\n\ |
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377 it under the terms of the GNU General Public License as published by\n\ |
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378 the Free Software Foundation; either version 2 of the License, or\n\ |
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379 (at your option) any later version.\n\ |
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380 \n\ |
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381 This program is distributed in the hope that it will be useful,\n\ |
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382 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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383 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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384 GNU General Public License for more details.\n\ |
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385 \n\ |
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386 You should have received a copy of the GNU General Public License\n\ |
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387 along with this program. If not, write to the Free Software\n\ |
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388 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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389 \n"; |
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390 |
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391 output_buf << ends; |
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392 maybe_page_output (output_buf); |
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393 |
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394 return retval; |
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395 } |
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396 |
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397 // XXX FIXME XXX -- this may not be the best place for these... |
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398 |
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399 Octave_object |
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400 feval (const Octave_object& args, int nargout) |
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401 { |
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402 Octave_object retval; |
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403 |
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404 tree_fvc *fcn = is_valid_function (args(0), "feval", 1); |
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405 if (fcn) |
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406 { |
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407 int tmp_nargin = args.length () - 1; |
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408 Octave_object tmp_args; |
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409 tmp_args.resize (tmp_nargin); |
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410 for (int i = 0; i < tmp_nargin; i++) |
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411 tmp_args(i) = args(i+1); |
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412 retval = fcn->eval (0, nargout, tmp_args); |
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413 } |
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414 |
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415 return retval; |
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416 } |
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417 |
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418 DEFUN ("feval", Ffeval, Sfeval, 11, |
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419 "feval (NAME, ARGS, ...)\n\ |
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420 \n\ |
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421 evaluate NAME as a function, passing ARGS as its arguments") |
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422 { |
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423 Octave_object retval; |
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424 |
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425 int nargin = args.length (); |
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426 |
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427 if (nargin > 0) |
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428 retval = feval (args, nargout); |
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429 else |
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430 print_usage ("feval"); |
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431 |
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432 return retval; |
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433 } |
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434 |
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435 static Octave_object |
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436 eval_string (const string& s, int print, int& parse_status, |
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437 int nargout) |
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438 { |
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439 begin_unwind_frame ("eval_string"); |
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440 |
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441 unwind_protect_int (get_input_from_eval_string); |
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442 unwind_protect_int (input_from_command_line_file); |
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443 unwind_protect_ptr (global_command); |
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444 unwind_protect_str (current_eval_string); |
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445 |
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446 get_input_from_eval_string = 1; |
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447 input_from_command_line_file = 0; |
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448 current_eval_string = s; |
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449 |
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450 YY_BUFFER_STATE old_buf = current_buffer (); |
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451 YY_BUFFER_STATE new_buf = create_buffer (0); |
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452 |
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453 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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454 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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455 |
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456 switch_to_buffer (new_buf); |
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457 |
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458 unwind_protect_ptr (curr_sym_tab); |
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459 |
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460 reset_parser (); |
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461 |
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462 parse_status = yyparse (); |
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463 |
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464 // Important to reset the idea of where input is coming from before |
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465 // trying to eval the command we just parsed -- it might contain the |
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466 // name of an function file that still needs to be parsed! |
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467 |
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468 tree_statement_list *command = global_command; |
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469 |
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470 run_unwind_frame ("eval_string"); |
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471 |
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472 Octave_object retval; |
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473 |
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474 if (parse_status == 0 && command) |
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475 { |
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476 retval = command->eval (print, nargout); |
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477 delete command; |
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478 } |
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479 |
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480 return retval; |
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481 } |
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482 |
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483 tree_constant |
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1755
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484 eval_string (const string& s, int print, int& parse_status) |
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1683
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485 { |
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486 tree_constant retval; |
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487 |
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1755
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488 Octave_object tmp = eval_string (s, print, parse_status, 1); |
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1683
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489 |
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490 retval = tmp(0); |
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491 |
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492 return retval; |
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493 } |
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494 |
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495 static Octave_object |
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496 eval_string (const tree_constant& arg, int& parse_status, int nargout) |
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497 { |
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1755
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498 string s = arg.string_value (); |
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1683
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499 |
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500 if (error_state) |
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501 { |
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502 error ("eval: expecting string argument"); |
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503 return -1.0; |
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504 } |
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505 |
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506 // Yes Virginia, we always print here... |
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507 |
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1755
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508 return eval_string (s, 1, parse_status, nargout); |
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1683
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509 } |
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510 |
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511 DEFUN ("eval", Feval, Seval, 11, |
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512 "eval (TRY, CATCH)\n\ |
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513 \n\ |
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514 Evaluate the string TRY as octave code. If that fails, evaluate the\n\ |
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515 string CATCH.") |
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516 { |
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517 Octave_object retval; |
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518 |
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519 int nargin = args.length (); |
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520 |
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521 if (nargin > 0) |
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522 { |
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523 begin_unwind_frame ("Feval"); |
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524 |
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|
525 if (nargin > 1) |
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526 { |
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527 unwind_protect_int (buffer_error_messages); |
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528 buffer_error_messages = 1; |
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|
529 } |
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530 |
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531 int parse_status = 0; |
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532 |
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533 retval = eval_string (args(0), parse_status, nargout); |
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534 |
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535 if (nargin > 1 && (parse_status != 0 || error_state)) |
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536 { |
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|
537 error_state = 0; |
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538 |
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539 // Set up for letting the user print any messages from |
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|
540 // errors that occurred in the first part of this eval(). |
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541 |
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|
542 buffer_error_messages = 0; |
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|
543 bind_global_error_variable (); |
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544 add_unwind_protect (clear_global_error_variable, 0); |
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545 |
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546 eval_string (args(1), parse_status, nargout); |
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547 |
|
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548 retval = Octave_object (); |
|
|
549 } |
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|
550 |
|
|
551 run_unwind_frame ("Feval"); |
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|
552 } |
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553 else |
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554 print_usage ("eval"); |
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555 |
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|
556 return retval; |
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|
557 } |
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558 |
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|
559 // Execute a shell command. |
|
|
560 |
|
|
561 DEFUN ("system", Fsystem, Ssystem, 11, |
|
|
562 "system (string [, return_output]): execute shell commands") |
|
|
563 { |
|
|
564 Octave_object retval; |
|
|
565 |
|
|
566 int nargin = args.length (); |
|
|
567 |
|
|
568 if (nargin < 1 || nargin > 2) |
|
|
569 { |
|
|
570 print_usage ("system"); |
|
|
571 return retval; |
|
|
572 } |
|
|
573 |
|
|
574 tree_constant tc_command = args(0); |
|
|
575 |
|
1755
|
576 string tmp = tc_command.string_value (); |
|
1683
|
577 |
|
|
578 if (error_state) |
|
|
579 { |
|
|
580 error ("system: expecting string as first argument"); |
|
|
581 } |
|
|
582 else |
|
|
583 { |
|
1755
|
584 iprocstream *cmd = new iprocstream (tmp.c_str ()); |
|
1683
|
585 |
|
|
586 add_unwind_protect (cleanup_iprocstream, cmd); |
|
|
587 |
|
|
588 int status = 127; |
|
|
589 |
|
|
590 if (cmd && *cmd) |
|
|
591 { |
|
|
592 ostrstream output_buf; |
|
|
593 |
|
|
594 char ch; |
|
|
595 while (cmd->get (ch)) |
|
|
596 output_buf.put (ch); |
|
|
597 |
|
|
598 output_buf << ends; |
|
|
599 |
|
|
600 status = cmd->close (); |
|
|
601 |
|
|
602 // The value in status is as returned by waitpid. If the |
|
|
603 // process exited normally, extract the actual exit status of |
|
|
604 // the command. Otherwise, return 127 as a failure code. |
|
|
605 |
|
|
606 if ((status & 0xff) == 0) |
|
|
607 status = (status & 0xff00) >> 8; |
|
|
608 |
|
|
609 if (nargout > 0 || nargin > 1) |
|
|
610 { |
|
|
611 char *msg = output_buf.str (); |
|
|
612 |
|
|
613 retval(1) = (double) status; |
|
|
614 retval(0) = msg; |
|
|
615 |
|
|
616 delete [] msg; |
|
|
617 } |
|
|
618 else |
|
|
619 maybe_page_output (output_buf); |
|
|
620 } |
|
|
621 else |
|
1755
|
622 error ("unable to start subprocess for `%s'", tmp.c_str ()); |
|
1683
|
623 |
|
|
624 run_unwind_protect (); |
|
|
625 } |
|
|
626 |
|
|
627 return retval; |
|
|
628 } |
|
|
629 |
|
|
630 DEFALIAS (shell_cmd, system); |
|
|
631 |
|
|
632 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
|
|
633 int debug_new_delete = 0; |
|
|
634 |
|
|
635 typedef void (*vfp)(void); |
|
|
636 extern vfp __new_handler; |
|
|
637 |
|
|
638 void * |
|
|
639 __builtin_new (size_t sz) |
|
|
640 { |
|
|
641 void *p; |
|
|
642 |
|
|
643 /* malloc (0) is unpredictable; avoid it. */ |
|
|
644 if (sz == 0) |
|
|
645 sz = 1; |
|
|
646 p = (void *) malloc (sz); |
|
|
647 while (p == 0) |
|
|
648 { |
|
|
649 (*__new_handler) (); |
|
|
650 p = (void *) malloc (sz); |
|
|
651 } |
|
|
652 |
|
|
653 if (debug_new_delete) |
|
|
654 cout << "__builtin_new: " << p << endl; |
|
|
655 |
|
|
656 return p; |
|
|
657 } |
|
|
658 |
|
|
659 void |
|
|
660 __builtin_delete (void *ptr) |
|
|
661 { |
|
|
662 if (debug_new_delete) |
|
|
663 cout << "__builtin_delete: " << ptr << endl; |
|
|
664 |
|
|
665 if (ptr) |
|
|
666 free (ptr); |
|
|
667 } |
|
|
668 #endif |
|
|
669 |
|
|
670 /* |
|
|
671 ;;; Local Variables: *** |
|
|
672 ;;; mode: C++ *** |
|
|
673 ;;; page-delimiter: "^/\\*" *** |
|
|
674 ;;; End: *** |
|
|
675 */ |
