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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) 1996 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 // Nonzero means we are using readline. |
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113 // (--no-line-editing) |
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114 #if defined (USE_READLINE) |
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115 int using_readline = 1; |
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116 #else |
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117 int using_readline = 0; |
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118 #endif |
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119 |
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120 // Nonzero means we printed messages about reading startup files. |
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121 int reading_startup_message_printed = 0; |
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122 |
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123 // Command number, counting from the beginning of this session. |
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124 int current_command_number = 1; |
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125 |
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126 // Nonzero means we are exiting via the builtin exit or quit functions. |
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127 int quitting_gracefully = 0; |
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128 |
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129 // Current command to execute. |
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130 tree_statement_list *global_command = 0; |
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131 |
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132 // Pointer to function that is currently being evaluated. |
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133 tree_function *curr_function = 0; |
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134 |
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135 // Nonzero means input is coming from startup file. |
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136 int input_from_startup_file = 0; |
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137 |
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138 // Nonzero means that input is coming from a file that was named on |
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139 // the command line. |
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140 int input_from_command_line_file = 1; |
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141 |
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142 // Top level context (?) |
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143 jmp_buf toplevel; |
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144 |
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145 void |
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146 parse_and_execute (FILE *f, int print) |
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147 { |
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148 begin_unwind_frame ("parse_and_execute"); |
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149 |
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150 YY_BUFFER_STATE old_buf = current_buffer (); |
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151 YY_BUFFER_STATE new_buf = create_buffer (f); |
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152 |
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153 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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154 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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155 |
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156 switch_to_buffer (new_buf); |
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157 |
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158 unwind_protect_int (using_readline); |
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159 unwind_protect_int (input_from_command_line_file); |
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160 |
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161 using_readline = 0; |
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162 input_from_command_line_file = 0; |
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163 |
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164 unwind_protect_ptr (curr_sym_tab); |
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165 |
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166 int retval; |
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167 do |
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168 { |
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169 reset_parser (); |
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170 |
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171 retval = yyparse (); |
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172 |
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173 if (retval == 0 && global_command) |
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174 { |
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175 global_command->eval (print); |
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176 delete global_command; |
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177 } |
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178 } |
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179 while (retval == 0); |
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180 |
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181 run_unwind_frame ("parse_and_execute"); |
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182 } |
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183 |
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184 void |
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185 parse_and_execute (const string& s, int print, int verbose, |
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186 const char *warn_for) |
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187 { |
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188 begin_unwind_frame ("parse_and_execute_2"); |
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189 |
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190 unwind_protect_int (reading_script_file); |
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191 unwind_protect_str (curr_fcn_file_full_name); |
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192 |
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193 reading_script_file = 1; |
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194 curr_fcn_file_full_name = s; |
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195 |
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196 FILE *f = get_input_from_file (s, 0); |
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197 |
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198 if (f) |
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199 { |
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200 unwind_protect_int (input_line_number); |
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201 unwind_protect_int (current_input_column); |
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202 |
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203 input_line_number = 0; |
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204 current_input_column = 1; |
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205 |
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206 if (verbose) |
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207 { |
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208 cout << "reading commands from " << s << " ... "; |
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209 reading_startup_message_printed = 1; |
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210 cout.flush (); |
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211 } |
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212 |
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213 parse_and_execute (f, print); |
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214 |
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215 fclose (f); |
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216 |
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217 if (verbose) |
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218 cout << "done." << endl; |
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219 } |
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220 else if (warn_for) |
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221 error ("%s: unable to open file `%s'", warn_for, s.c_str ()); |
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222 |
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223 run_unwind_frame ("parse_and_execute_2"); |
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224 } |
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225 |
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226 int |
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227 main_loop (void) |
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228 { |
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229 // Allow the user to interrupt us without exiting. |
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230 |
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231 if (setjmp (toplevel) != 0) |
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232 { |
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233 raw_mode (0); |
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234 |
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235 cout << "\n"; |
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236 } |
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237 |
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238 can_interrupt = 1; |
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239 |
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240 catch_interrupts (); |
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241 |
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242 // The big loop. |
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243 |
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244 int retval; |
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245 do |
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246 { |
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247 curr_sym_tab = top_level_sym_tab; |
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248 |
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249 reset_parser (); |
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250 |
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251 retval = yyparse (); |
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252 |
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253 if (retval == 0 && global_command) |
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254 { |
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255 global_command->eval (1); |
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256 delete global_command; |
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257 current_command_number++; |
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258 } |
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259 } |
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260 while (retval == 0); |
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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 DEFUN ("source", Fsource, Ssource, 10, |
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266 "source (FILE)\n\ |
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267 \n\ |
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268 Parse and execute the contents of FILE. Like executing commands in a\n\ |
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269 script file but without requiring the file to be named `FILE.m'.") |
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270 { |
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271 Octave_object retval; |
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272 |
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273 int nargin = args.length (); |
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274 |
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275 if (nargin == 1) |
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276 { |
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277 string file = args(0).string_value (); |
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278 |
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279 if (! error_state) |
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280 { |
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281 file = oct_tilde_expand (file); |
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282 |
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283 parse_and_execute (file, 1, 0, "source"); |
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284 |
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285 if (error_state) |
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286 error ("source: error sourcing file `%s'", file.c_str ()); |
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287 } |
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288 else |
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289 error ("source: expecting file name as argument"); |
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290 } |
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291 else |
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292 print_usage ("source"); |
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293 |
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294 return retval; |
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295 } |
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296 |
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297 // Fix up things before exiting. |
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298 |
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299 void |
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300 clean_up_and_exit (int retval) |
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301 { |
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302 raw_mode (0); |
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303 |
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304 octave_command_history.clean_up_and_save (); |
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305 |
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306 close_plot_stream (); |
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307 |
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308 close_diary_file (); |
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309 |
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310 close_files (); |
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311 |
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312 cleanup_tmp_files (); |
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313 |
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314 if (!quitting_gracefully && (interactive || forced_interactive)) |
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315 cout << "\n"; |
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316 |
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317 if (retval == EOF) |
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318 retval = 0; |
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319 |
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320 exit (retval); |
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321 |
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322 // This is bogus but should prevent g++ from giving a warning saying |
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323 // that this volatile function does return. |
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324 |
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325 panic_impossible (); |
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326 } |
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327 |
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328 DEFUN_TEXT ("casesen", Fcasesen, Scasesen, 10, |
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329 "casesen [on|off]") |
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330 { |
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331 Octave_object retval; |
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332 |
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333 int argc = args.length () + 1; |
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334 |
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335 string_vector argv = make_argv (args, "casesen"); |
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336 |
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337 if (error_state) |
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338 return retval; |
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339 |
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340 if (argc == 1 || (argc > 1 && argv[1] == "off")) |
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341 warning ("casesen: sorry, Octave is always case sensitive"); |
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342 else if (argc > 1 && argv[1] == "on") |
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343 ; // ok. |
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344 else |
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345 print_usage ("casesen"); |
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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 ("computer", Fcomputer, Scomputer, 11, |
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351 "computer ():\n\ |
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352 \n\ |
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353 Have Octave ask the system, \"What kind of computer are you?\"") |
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354 { |
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355 Octave_object retval; |
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356 |
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357 int nargin = args.length (); |
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358 |
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359 if (nargin != 0) |
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360 warning ("computer: ignoring extra arguments"); |
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361 |
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362 ostrstream output_buf; |
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363 |
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364 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
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365 output_buf << "Hi Dave, I'm a HAL-9000"; |
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366 else |
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367 output_buf << TARGET_HOST_TYPE; |
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368 |
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369 if (nargout == 0) |
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370 { |
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371 output_buf << "\n" << ends; |
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372 maybe_page_output (output_buf); |
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373 } |
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374 else |
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375 { |
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376 output_buf << ends; |
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377 char *msg = output_buf.str (); |
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378 retval = msg; |
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379 delete [] msg; |
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380 } |
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381 |
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382 return retval; |
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383 } |
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384 |
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385 DEFUN ("flops", Fflops, Sflops, 10, |
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386 "flops (): count floating point operations") |
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387 { |
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388 int nargin = args.length (); |
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389 |
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390 if (nargin > 0) |
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391 print_usage ("flops"); |
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392 |
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393 warning ("flops is a flop, always returning zero"); |
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394 |
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395 return 0.0; |
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396 } |
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397 |
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398 DEFUN ("quit", Fquit, Squit, 00, |
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399 "quit (): exit Octave gracefully") |
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400 { |
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401 Octave_object retval; |
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402 quitting_gracefully = 1; |
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403 clean_up_and_exit (0); |
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404 return retval; |
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405 } |
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406 |
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407 DEFALIAS (exit, quit); |
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408 |
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409 DEFUN ("warranty", Fwarranty, Swarranty, 00, |
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410 "warranty (): describe copying conditions") |
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411 { |
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412 Octave_object retval; |
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413 |
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414 ostrstream output_buf; |
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415 output_buf << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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416 This program is free software; you can redistribute it and/or modify\n\ |
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417 it under the terms of the GNU General Public License as published by\n\ |
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418 the Free Software Foundation; either version 2 of the License, or\n\ |
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419 (at your option) any later version.\n\ |
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420 \n\ |
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421 This program is distributed in the hope that it will be useful,\n\ |
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422 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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423 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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424 GNU General Public License for more details.\n\ |
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425 \n\ |
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426 You should have received a copy of the GNU General Public License\n\ |
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427 along with this program. If not, write to the Free Software\n\ |
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428 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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429 \n"; |
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430 |
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431 output_buf << ends; |
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432 maybe_page_output (output_buf); |
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433 |
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434 return retval; |
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435 } |
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436 |
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437 // XXX FIXME XXX -- this may not be the best place for these... |
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438 |
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439 Octave_object |
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440 feval (const Octave_object& args, int nargout) |
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441 { |
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442 Octave_object retval; |
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443 |
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444 tree_fvc *fcn = is_valid_function (args(0), "feval", 1); |
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445 if (fcn) |
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446 { |
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447 int tmp_nargin = args.length () - 1; |
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448 Octave_object tmp_args; |
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449 tmp_args.resize (tmp_nargin); |
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450 for (int i = 0; i < tmp_nargin; i++) |
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451 tmp_args(i) = args(i+1); |
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452 retval = fcn->eval (0, nargout, tmp_args); |
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453 } |
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454 |
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455 return retval; |
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456 } |
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457 |
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458 DEFUN ("feval", Ffeval, Sfeval, 11, |
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459 "feval (NAME, ARGS, ...)\n\ |
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460 \n\ |
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461 evaluate NAME as a function, passing ARGS as its arguments") |
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462 { |
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463 Octave_object retval; |
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464 |
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465 int nargin = args.length (); |
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466 |
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467 if (nargin > 0) |
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468 retval = feval (args, nargout); |
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469 else |
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470 print_usage ("feval"); |
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471 |
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472 return retval; |
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473 } |
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474 |
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475 static Octave_object |
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1755
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476 eval_string (const string& s, int print, int& parse_status, |
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1683
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477 int nargout) |
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478 { |
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479 begin_unwind_frame ("eval_string"); |
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480 |
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481 unwind_protect_int (get_input_from_eval_string); |
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482 unwind_protect_int (input_from_command_line_file); |
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483 unwind_protect_ptr (global_command); |
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1755
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484 unwind_protect_str (current_eval_string); |
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485 |
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486 get_input_from_eval_string = 1; |
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487 input_from_command_line_file = 0; |
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1755
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488 current_eval_string = s; |
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1683
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489 |
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490 YY_BUFFER_STATE old_buf = current_buffer (); |
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491 YY_BUFFER_STATE new_buf = create_buffer (0); |
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492 |
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493 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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494 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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495 |
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496 switch_to_buffer (new_buf); |
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497 |
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498 unwind_protect_ptr (curr_sym_tab); |
|
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499 |
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500 reset_parser (); |
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|
501 |
|
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502 parse_status = yyparse (); |
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503 |
|
|
504 // Important to reset the idea of where input is coming from before |
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505 // trying to eval the command we just parsed -- it might contain the |
|
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506 // name of an function file that still needs to be parsed! |
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507 |
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508 tree_statement_list *command = global_command; |
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509 |
|
|
510 run_unwind_frame ("eval_string"); |
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|
511 |
|
|
512 Octave_object retval; |
|
|
513 |
|
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514 if (parse_status == 0 && command) |
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515 { |
|
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516 retval = command->eval (print, nargout); |
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517 delete command; |
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|
518 } |
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519 |
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520 return retval; |
|
|
521 } |
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|
522 |
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|
523 tree_constant |
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1755
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524 eval_string (const string& s, int print, int& parse_status) |
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1683
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525 { |
|
|
526 tree_constant retval; |
|
|
527 |
|
1755
|
528 Octave_object tmp = eval_string (s, print, parse_status, 1); |
|
1683
|
529 |
|
|
530 retval = tmp(0); |
|
|
531 |
|
|
532 return retval; |
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|
533 } |
|
|
534 |
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|
535 static Octave_object |
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536 eval_string (const tree_constant& arg, int& parse_status, int nargout) |
|
|
537 { |
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1755
|
538 string s = arg.string_value (); |
|
1683
|
539 |
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|
540 if (error_state) |
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|
541 { |
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|
542 error ("eval: expecting string argument"); |
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543 return -1.0; |
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|
544 } |
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|
545 |
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|
546 // Yes Virginia, we always print here... |
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547 |
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1755
|
548 return eval_string (s, 1, parse_status, nargout); |
|
1683
|
549 } |
|
|
550 |
|
|
551 DEFUN ("eval", Feval, Seval, 11, |
|
|
552 "eval (TRY, CATCH)\n\ |
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|
553 \n\ |
|
|
554 Evaluate the string TRY as octave code. If that fails, evaluate the\n\ |
|
|
555 string CATCH.") |
|
|
556 { |
|
|
557 Octave_object retval; |
|
|
558 |
|
|
559 int nargin = args.length (); |
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|
560 |
|
|
561 if (nargin > 0) |
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|
562 { |
|
|
563 begin_unwind_frame ("Feval"); |
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|
564 |
|
|
565 if (nargin > 1) |
|
|
566 { |
|
|
567 unwind_protect_int (buffer_error_messages); |
|
|
568 buffer_error_messages = 1; |
|
|
569 } |
|
|
570 |
|
|
571 int parse_status = 0; |
|
|
572 |
|
|
573 retval = eval_string (args(0), parse_status, nargout); |
|
|
574 |
|
|
575 if (nargin > 1 && (parse_status != 0 || error_state)) |
|
|
576 { |
|
|
577 error_state = 0; |
|
|
578 |
|
|
579 // Set up for letting the user print any messages from |
|
|
580 // errors that occurred in the first part of this eval(). |
|
|
581 |
|
|
582 buffer_error_messages = 0; |
|
|
583 bind_global_error_variable (); |
|
|
584 add_unwind_protect (clear_global_error_variable, 0); |
|
|
585 |
|
|
586 eval_string (args(1), parse_status, nargout); |
|
|
587 |
|
|
588 retval = Octave_object (); |
|
|
589 } |
|
|
590 |
|
|
591 run_unwind_frame ("Feval"); |
|
|
592 } |
|
|
593 else |
|
|
594 print_usage ("eval"); |
|
|
595 |
|
|
596 return retval; |
|
|
597 } |
|
|
598 |
|
|
599 // Execute a shell command. |
|
|
600 |
|
|
601 DEFUN ("system", Fsystem, Ssystem, 11, |
|
|
602 "system (string [, return_output]): execute shell commands") |
|
|
603 { |
|
|
604 Octave_object retval; |
|
|
605 |
|
|
606 int nargin = args.length (); |
|
|
607 |
|
|
608 if (nargin < 1 || nargin > 2) |
|
|
609 { |
|
|
610 print_usage ("system"); |
|
|
611 return retval; |
|
|
612 } |
|
|
613 |
|
|
614 tree_constant tc_command = args(0); |
|
|
615 |
|
1755
|
616 string tmp = tc_command.string_value (); |
|
1683
|
617 |
|
|
618 if (error_state) |
|
|
619 { |
|
|
620 error ("system: expecting string as first argument"); |
|
|
621 } |
|
|
622 else |
|
|
623 { |
|
1755
|
624 iprocstream *cmd = new iprocstream (tmp.c_str ()); |
|
1683
|
625 |
|
|
626 add_unwind_protect (cleanup_iprocstream, cmd); |
|
|
627 |
|
|
628 int status = 127; |
|
|
629 |
|
|
630 if (cmd && *cmd) |
|
|
631 { |
|
|
632 ostrstream output_buf; |
|
|
633 |
|
|
634 char ch; |
|
|
635 while (cmd->get (ch)) |
|
|
636 output_buf.put (ch); |
|
|
637 |
|
|
638 output_buf << ends; |
|
|
639 |
|
|
640 status = cmd->close (); |
|
|
641 |
|
|
642 // The value in status is as returned by waitpid. If the |
|
|
643 // process exited normally, extract the actual exit status of |
|
|
644 // the command. Otherwise, return 127 as a failure code. |
|
|
645 |
|
|
646 if ((status & 0xff) == 0) |
|
|
647 status = (status & 0xff00) >> 8; |
|
|
648 |
|
|
649 if (nargout > 0 || nargin > 1) |
|
|
650 { |
|
|
651 char *msg = output_buf.str (); |
|
|
652 |
|
|
653 retval(1) = (double) status; |
|
|
654 retval(0) = msg; |
|
|
655 |
|
|
656 delete [] msg; |
|
|
657 } |
|
|
658 else |
|
|
659 maybe_page_output (output_buf); |
|
|
660 } |
|
|
661 else |
|
1755
|
662 error ("unable to start subprocess for `%s'", tmp.c_str ()); |
|
1683
|
663 |
|
|
664 run_unwind_protect (); |
|
|
665 } |
|
|
666 |
|
|
667 return retval; |
|
|
668 } |
|
|
669 |
|
|
670 DEFALIAS (shell_cmd, system); |
|
|
671 |
|
|
672 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
|
|
673 int debug_new_delete = 0; |
|
|
674 |
|
|
675 typedef void (*vfp)(void); |
|
|
676 extern vfp __new_handler; |
|
|
677 |
|
|
678 void * |
|
|
679 __builtin_new (size_t sz) |
|
|
680 { |
|
|
681 void *p; |
|
|
682 |
|
|
683 /* malloc (0) is unpredictable; avoid it. */ |
|
|
684 if (sz == 0) |
|
|
685 sz = 1; |
|
|
686 p = (void *) malloc (sz); |
|
|
687 while (p == 0) |
|
|
688 { |
|
|
689 (*__new_handler) (); |
|
|
690 p = (void *) malloc (sz); |
|
|
691 } |
|
|
692 |
|
|
693 if (debug_new_delete) |
|
|
694 cout << "__builtin_new: " << p << endl; |
|
|
695 |
|
|
696 return p; |
|
|
697 } |
|
|
698 |
|
|
699 void |
|
|
700 __builtin_delete (void *ptr) |
|
|
701 { |
|
|
702 if (debug_new_delete) |
|
|
703 cout << "__builtin_delete: " << ptr << endl; |
|
|
704 |
|
|
705 if (ptr) |
|
|
706 free (ptr); |
|
|
707 } |
|
|
708 #endif |
|
|
709 |
|
|
710 /* |
|
|
711 ;;; Local Variables: *** |
|
|
712 ;;; mode: C++ *** |
|
|
713 ;;; page-delimiter: "^/\\*" *** |
|
|
714 ;;; End: *** |
|
|
715 */ |
