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1 // octave.cc -*- C++ -*- |
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2 /* |
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3 |
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268
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4 Copyright (C) 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 // Born February 20, 1992. |
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25 |
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240
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26 #ifdef HAVE_CONFIG_H |
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27 #include "config.h" |
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28 #endif |
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29 |
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30 #include <sys/types.h> |
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139
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31 #ifdef HAVE_UNISTD_H |
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32 #include <unistd.h> |
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33 #endif |
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34 #include <sys/stat.h> |
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35 #include <time.h> |
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36 #include <pwd.h> |
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37 #include <stdlib.h> |
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38 #include <string.h> |
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39 #include <signal.h> |
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40 #include <assert.h> |
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41 #include <iostream.h> |
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42 #include <strstream.h> |
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43 #include <fstream.h> |
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44 |
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636
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45 extern "C" |
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46 { |
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47 #include <setjmp.h> |
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48 } |
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49 |
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139
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50 #include "getopt.h" |
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51 |
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240
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52 #include "lo-error.h" |
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53 |
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54 #include "sighandlers.h" |
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55 #include "variables.h" |
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56 #include "error.h" |
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57 #include "dynamic-ld.h" |
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578
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58 #include "tree-misc.h" |
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59 #include "tree-const.h" |
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529
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60 #include "tree-plot.h" |
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61 #include "utils.h" |
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62 #include "input.h" |
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63 #include "pager.h" |
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64 #include "lex.h" |
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65 #include "help.h" |
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66 #include "octave.h" |
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67 #include "parse.h" |
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666
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68 #include "defaults.h" |
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69 #include "user-prefs.h" |
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562
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70 #include "procstream.h" |
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71 #include "unwind-prot.h" |
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72 #include "octave-hist.h" |
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529
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73 #include "builtins.h" |
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74 #include "version.h" |
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75 #include "file-io.h" |
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76 #include "sysdep.h" |
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529
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77 #include "defun.h" |
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78 |
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318
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79 #if !defined (HAVE_ATEXIT) && defined (HAVE_ON_EXIT) |
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80 extern "C" { int on_exit (); } |
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81 #define atexit on_exit |
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82 #endif |
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83 |
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84 // argv[0] for this program. |
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85 char *raw_prog_name = 0; |
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86 |
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87 // Cleaned-up name of this program, not including path information. |
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88 char *prog_name = 0; |
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89 |
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90 // Login name for user running this program. |
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91 char *user_name = 0; |
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92 |
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93 // Name of the host we are running on. |
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94 char *host_name = 0; |
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95 |
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96 // User's home directory. |
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529
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97 char *home_directory = 0; |
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98 |
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99 // Guess what? |
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100 char *the_current_working_directory = 0; |
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101 |
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102 // Load path specified on command line. (--path path; -p path) |
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103 char *load_path = 0; |
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104 |
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105 // Name of the info file specified on command line. |
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106 // (--info-file file; -i file) |
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107 char *info_file = 0; |
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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 char *editor = 0; |
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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 // Command number, counting from the beginning of this session. |
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120 int current_command_number = 1; |
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121 |
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122 // Nonzero means we are exiting via the builtin exit or quit functions. |
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123 int quitting_gracefully = 0; |
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124 |
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125 // Current command to execute. |
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126 tree_statement_list *global_command = 0; |
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127 |
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128 // Pointer to function that is currently being evaluated. |
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129 tree_function *curr_function = 0; |
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130 |
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131 // Nonzero means input is coming from startup file. |
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132 int input_from_startup_file = 0; |
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133 |
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134 // Top level context (?) |
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135 jmp_buf toplevel; |
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136 |
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137 // This is not really the right place to do this... |
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138 typedef void (*one_arg_error_handler_t) (const char*); |
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139 extern one_arg_error_handler_t set_Complex_error_handler |
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140 (one_arg_error_handler_t f); |
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141 |
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287
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142 // This is from readline's paren.c: |
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143 extern int rl_blink_matching_paren; |
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144 |
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195
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145 static void |
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146 octave_Complex_error_handler (const char* msg) |
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147 { |
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148 warning (msg); |
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149 } |
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150 |
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151 // Nonzero means we read ~/.octaverc and ./.octaverc. |
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152 // (--norc; --ignore-init-file; -f) |
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153 static int read_init_files = 1; |
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154 |
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155 // Nonzero means we printed messages about reading startup files. |
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156 static int reading_startup_message_printed = 0; |
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157 |
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158 // Nonzero means we don\'t print the usual startup message. |
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159 // (--quiet; --silent; -q) |
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160 static int inhibit_startup_message = 0; |
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161 |
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162 // Usage message |
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163 static const char *usage_string = |
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164 "octave [-?Vdfhiqvx] [-p path] [--debug] [--help] [--ignore-init-file]\n\ |
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165 [--info-file file] [--interactive] [--path path] [--silent]\n\ |
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166 [--verbose] [--version] [--echo-commands] [file]"; |
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167 |
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168 // This is here so that it\'s more likely that the usage message and |
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169 // the real set of options will agree. |
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170 static const char *short_opts = "?Vdfhip:qvx"; |
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171 |
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172 // Long options. |
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173 #define INFO_FILE_OPTION 1 |
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174 static struct option long_opts[] = |
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175 { |
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176 { "debug", 0, 0, 'd' }, |
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177 { "help", 0, 0, 'h' }, |
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178 { "interactive", 0, 0, 'i' }, |
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179 { "info-file", 1, 0, INFO_FILE_OPTION }, |
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180 { "norc", 0, 0, 'f' }, |
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181 { "ignore-init-file", 0, 0, 'f' }, |
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182 { "path", 1, 0, 'p' }, |
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183 { "quiet", 0, 0, 'q' }, |
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184 { "silent", 0, 0, 'q' }, |
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185 { "verbose", 0, 0, 'V' }, |
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186 { "version", 0, 0, 'v' }, |
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187 { "echo-commands", 0, 0, 'x' }, |
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188 { 0, 0, 0, 0 } |
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189 }; |
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190 |
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191 // Initialize some global variables for later use. |
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192 |
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193 static void |
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194 initialize_globals (char *name) |
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195 { |
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196 struct passwd *entry = getpwuid (getuid ()); |
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197 if (entry) |
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198 user_name = strsave (entry->pw_name); |
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199 else |
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200 user_name = strsave ("I have no name!"); |
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201 endpwent (); |
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202 |
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203 char hostname[256]; |
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204 if (gethostname (hostname, 255) < 0) |
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205 host_name = strsave ("I have no host!"); |
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206 else |
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207 host_name = strsave (hostname); |
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208 |
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209 char *hd = getenv ("HOME"); |
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210 if (hd) |
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211 home_directory = strsave (hd); |
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212 else |
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213 home_directory = strsave ("I have no home!"); |
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214 |
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215 char *shell_path = getenv ("PATH"); |
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216 char *arch_dir = octave_arch_lib_dir (); |
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217 char *bin_dir = octave_bin_dir (); |
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218 |
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219 int len = strlen (arch_dir) + strlen (bin_dir) + 7; |
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220 |
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221 char *putenv_cmd = 0; |
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222 |
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223 if (shell_path) |
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224 { |
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225 len += strlen (shell_path) + 1; |
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226 putenv_cmd = new char [len]; |
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227 sprintf (putenv_cmd, "PATH=%s:%s:%s", shell_path, arch_dir, bin_dir); |
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228 } |
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229 else |
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230 { |
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231 putenv_cmd = new char [len]; |
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232 sprintf (putenv_cmd, "PATH=%s:%s", arch_dir, bin_dir); |
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233 } |
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234 |
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235 putenv (putenv_cmd); |
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236 |
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237 raw_prog_name = strsave (name); |
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238 prog_name = strsave ("octave"); |
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239 |
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240 load_path = default_path (); |
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186
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241 |
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242 info_file = default_info_file (); |
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243 |
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244 editor = default_editor (); |
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245 } |
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246 |
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247 void |
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248 parse_and_execute (FILE *f, int print) |
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249 { |
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250 begin_unwind_frame ("parse_and_execute"); |
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251 |
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252 YY_BUFFER_STATE old_buf = current_buffer (); |
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253 YY_BUFFER_STATE new_buf = create_buffer (f); |
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254 |
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255 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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256 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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257 |
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258 switch_to_buffer (new_buf); |
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259 |
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260 unwind_protect_int (echo_input); |
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261 unwind_protect_int (using_readline); |
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262 unwind_protect_int (saving_history); |
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263 |
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264 echo_input = 0; |
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265 using_readline = 0; |
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266 saving_history = 0; |
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267 |
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268 unwind_protect_ptr (curr_sym_tab); |
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269 |
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270 int retval; |
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271 do |
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272 { |
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191
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273 reset_parser (); |
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274 retval = yyparse (); |
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275 if (retval == 0 && global_command) |
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276 { |
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277 global_command->eval (print); |
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278 delete global_command; |
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279 } |
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280 } |
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281 while (retval == 0); |
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282 |
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283 run_unwind_frame ("parse_and_execute"); |
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284 } |
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285 |
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286 void |
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287 parse_and_execute (char *s, int print, int verbose) |
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288 { |
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289 begin_unwind_frame ("parse_and_execute_2"); |
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290 |
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291 unwind_protect_int (reading_script_file); |
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292 |
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293 reading_script_file = 1; |
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294 |
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295 FILE *f = get_input_from_file (s, 0); |
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296 if (f) |
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297 { |
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298 unwind_protect_int (input_line_number); |
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299 unwind_protect_int (current_input_column); |
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300 unwind_protect_int (echo_input); |
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301 |
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302 input_line_number = 0; |
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303 current_input_column = 1; |
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304 echo_input = 0; |
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305 |
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578
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306 if (verbose) |
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307 { |
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793
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308 cout << "reading commands from " << s << " ... "; |
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578
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309 reading_startup_message_printed = 1; |
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310 cout.flush (); |
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311 } |
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312 |
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313 parse_and_execute (f, print); |
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314 |
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315 if (verbose) |
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316 cout << "done." << endl; |
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317 } |
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318 |
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319 run_unwind_frame ("parse_and_execute_2"); |
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320 } |
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321 |
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322 // Initialize by reading startup files. |
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323 |
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324 static void |
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325 execute_startup_files (void) |
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326 { |
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315
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327 begin_unwind_frame ("execute_startup_files"); |
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328 |
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329 unwind_protect_int (input_from_startup_file); |
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330 input_from_startup_file = 1; |
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331 |
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332 int verbose = (verbose_flag && ! inhibit_startup_message); |
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333 |
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1
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334 // Execute commands from the site-wide configuration file. |
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335 |
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336 char *sd = get_site_defaults (); |
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337 |
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578
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338 parse_and_execute (sd, 0, verbose); |
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339 |
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340 // Try to execute commands from $HOME/.octaverc and ./.octaverc. |
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341 |
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529
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342 char *home_rc = 0; |
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343 if (home_directory) |
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1
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344 { |
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85
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345 home_rc = strconcat (home_directory, "/.octaverc"); |
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346 parse_and_execute (home_rc, 0, verbose); |
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1
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347 } |
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348 |
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85
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349 // Names alone are not enough. |
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350 |
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351 struct stat home_rc_statbuf; |
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352 stat (home_rc, &home_rc_statbuf); |
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353 delete [] home_rc; |
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354 |
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355 struct stat dot_rc_statbuf; |
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356 stat ("./.octaverc", &dot_rc_statbuf); |
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357 |
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358 if (home_rc_statbuf.st_ino != dot_rc_statbuf.st_ino) |
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359 parse_and_execute ("./.octaverc", 0, verbose); |
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315
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360 |
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361 run_unwind_frame ("execute_startup_files"); |
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1
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362 } |
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363 |
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581
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364 // Usage message with extra help. |
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365 |
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1
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366 static void |
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367 verbose_usage (void) |
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368 { |
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369 cout << "\n" |
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370 << " Octave, version " << version_string |
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268
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371 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
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1
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372 << " This is free software with ABSOLUTELY NO WARRANTY.\n" |
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373 << "\n" |
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139
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374 << " usage: " << usage_string |
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375 << "\n\n" |
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824
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376 << " V : enable verbose output in some cases\n" |
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1
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377 << " d : enter parser debugging mode\n" |
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378 << " f : don't read ~/.octaverc or .octaverc at startup\n" |
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379 << " h|? : print short help message and exit\n" |
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380 << " i : force interactive behavior\n" |
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381 << " q : don't print message at startup\n" |
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139
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382 << " v : print version number and exit\n" |
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1
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383 << " x : echo commands as they are executed\n" |
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384 << "\n" |
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385 << " file : execute commands from named file\n" |
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285
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386 << "\n"; |
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387 |
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613
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388 exit (0); |
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1
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389 } |
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390 |
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581
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391 // Terse usage messsage. |
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392 |
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1
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393 static void |
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394 usage (void) |
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395 { |
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613
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396 cerr << "usage: " << usage_string << "\n"; |
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1
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397 exit (1); |
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398 } |
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399 |
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581
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400 // Fix up things before exiting. |
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401 |
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195
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402 void |
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1
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403 clean_up_and_exit (int retval) |
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404 { |
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405 raw_mode (0); |
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176
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406 |
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1
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407 clean_up_history (); |
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176
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408 |
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1
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409 close_plot_stream (); |
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176
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410 |
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581
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411 close_diary_file (); |
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412 |
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1
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413 close_files (); |
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414 |
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318
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415 cleanup_tmp_files (); |
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416 |
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1
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417 if (!quitting_gracefully && (interactive || forced_interactive)) |
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418 cout << "\n"; |
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419 |
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420 if (retval == EOF) |
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421 retval = 0; |
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422 |
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423 exit (retval); |
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195
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424 |
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425 // This is bogus but should prevent g++ from giving a warning saying |
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426 // that this volatile function does return. |
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427 |
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428 panic_impossible (); |
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1
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429 } |
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430 |
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431 static void |
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432 print_version_and_exit (void) |
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433 { |
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434 cout << "octave, version " << version_string << "\n"; |
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435 exit (0); |
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436 } |
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437 |
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721
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438 static void |
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439 initialize_error_handlers () |
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440 { |
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441 set_Complex_error_handler (octave_Complex_error_handler); |
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442 |
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443 set_liboctave_error_handler (error); |
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444 } |
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445 |
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581
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446 // You guessed it. |
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447 |
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1
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448 int |
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449 main (int argc, char **argv) |
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450 { |
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721
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451 // The order of these calls is important, and initialize globals must |
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452 // come before the options are processed because some command line |
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453 // options override defaults. |
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454 |
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455 init_user_prefs (); |
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456 |
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457 initialize_pager (); |
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458 |
|
1
|
459 sysdep_init (); |
|
|
460 |
|
721
|
461 initialize_error_handlers (); |
|
223
|
462 |
|
1
|
463 initialize_globals (argv[0]); |
|
|
464 |
|
139
|
465 int optc; |
|
|
466 while ((optc = getopt_long (argc, argv, short_opts, long_opts, 0)) != EOF) |
|
1
|
467 { |
|
139
|
468 switch (optc) |
|
1
|
469 { |
|
793
|
470 case 'V': |
|
|
471 verbose_flag++; |
|
|
472 break; |
|
|
473 |
|
1
|
474 case 'd': |
|
|
475 yydebug++; |
|
|
476 break; |
|
777
|
477 |
|
1
|
478 case 'f': |
|
|
479 read_init_files = 0; |
|
|
480 break; |
|
777
|
481 |
|
1
|
482 case 'h': |
|
|
483 case '?': |
|
|
484 verbose_usage (); |
|
|
485 break; |
|
777
|
486 |
|
1
|
487 case 'i': |
|
|
488 forced_interactive = 1; |
|
|
489 break; |
|
777
|
490 |
|
1
|
491 case 'p': |
|
529
|
492 if (optarg) |
|
139
|
493 load_path = strsave (optarg); |
|
1
|
494 break; |
|
777
|
495 |
|
1
|
496 case 'q': |
|
|
497 inhibit_startup_message = 1; |
|
|
498 break; |
|
777
|
499 |
|
1
|
500 case 'x': |
|
|
501 echo_input = 1; |
|
|
502 break; |
|
777
|
503 |
|
1
|
504 case 'v': |
|
|
505 print_version_and_exit (); |
|
|
506 break; |
|
777
|
507 |
|
186
|
508 case INFO_FILE_OPTION: |
|
529
|
509 if (optarg) |
|
186
|
510 info_file = strsave (optarg); |
|
|
511 break; |
|
777
|
512 |
|
1
|
513 default: |
|
|
514 usage (); |
|
|
515 break; |
|
|
516 } |
|
|
517 } |
|
|
518 |
|
318
|
519 #if defined (HAVE_ATEXIT) || (HAVE_ON_EXIT) |
|
|
520 // Make sure we clean up when we exit. If we don't have atexit or |
|
|
521 // on_exit, we're going to leave some junk files around if we exit |
|
|
522 // abnormally. |
|
1
|
523 atexit (cleanup_tmp_files); |
|
318
|
524 #endif |
|
1
|
525 |
|
721
|
526 // These can come after command line args since none of them set any |
|
|
527 // defaults that might be changed by command line options. |
|
581
|
528 |
|
636
|
529 install_signal_handlers (); |
|
|
530 |
|
1
|
531 initialize_history (); |
|
|
532 |
|
|
533 initialize_file_io (); |
|
|
534 |
|
581
|
535 initialize_symbol_tables (); |
|
1
|
536 |
|
|
537 install_builtins (); |
|
|
538 |
|
315
|
539 initialize_readline (); |
|
|
540 |
|
721
|
541 init_dynamic_linker (); |
|
|
542 |
|
578
|
543 if (! inhibit_startup_message) |
|
|
544 cout << "Octave, version " << version_string |
|
|
545 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
|
|
546 << "This is free software with ABSOLUTELY NO WARRANTY.\n" |
|
|
547 << "For details, type `warranty'.\n" << endl; |
|
|
548 |
|
1
|
549 if (read_init_files) |
|
|
550 { |
|
|
551 saving_history = 0; |
|
|
552 execute_startup_files (); |
|
|
553 saving_history = 1; |
|
|
554 } |
|
|
555 |
|
578
|
556 if (! inhibit_startup_message && reading_startup_message_printed) |
|
|
557 cout << endl; |
|
|
558 |
|
1
|
559 // Avoid counting commands executed from startup files. |
|
|
560 current_command_number = 1; |
|
|
561 |
|
|
562 // If there is an extra argument, see if it names a file to read. |
|
|
563 |
|
149
|
564 int remaining_args = argc - optind; |
|
|
565 if (remaining_args > 1) |
|
|
566 { |
|
|
567 usage (); |
|
|
568 } |
|
|
569 else if (remaining_args == 1) |
|
1
|
570 { |
|
139
|
571 FILE *infile = get_input_from_file (argv[optind]); |
|
529
|
572 if (infile) |
|
287
|
573 { |
|
|
574 rl_blink_matching_paren = 0; |
|
|
575 switch_to_buffer (create_buffer (infile)); |
|
|
576 } |
|
529
|
577 else |
|
|
578 clean_up_and_exit (1); |
|
1
|
579 } |
|
|
580 else |
|
|
581 { |
|
149
|
582 switch_to_buffer (create_buffer (get_input_from_stdin ())); |
|
|
583 |
|
1
|
584 // Is input coming from a terminal? If so, we are probably |
|
|
585 // interactive. |
|
|
586 |
|
|
587 interactive = (isatty (fileno (stdin)) && isatty (fileno (stdout))); |
|
|
588 } |
|
|
589 |
|
|
590 // Force input to be echoed if not really interactive, but the user |
|
|
591 // has forced interactive behavior. |
|
|
592 |
|
|
593 if (!interactive && forced_interactive) |
|
287
|
594 { |
|
|
595 rl_blink_matching_paren = 0; |
|
|
596 echo_input = 1; |
|
|
597 } |
|
1
|
598 |
|
|
599 if (! (interactive || forced_interactive)) |
|
|
600 using_readline = 0; |
|
|
601 |
|
|
602 // Allow the user to interrupt us without exiting. |
|
|
603 |
|
|
604 volatile sig_handler *saved_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
605 |
|
|
606 if (setjmp (toplevel) != 0) |
|
|
607 { |
|
|
608 raw_mode (0); |
|
176
|
609 |
|
1
|
610 cout << "\n"; |
|
|
611 } |
|
|
612 |
|
|
613 can_interrupt = 1; |
|
|
614 |
|
|
615 signal (SIGINT, saved_sigint_handler); |
|
|
616 |
|
|
617 // The big loop. |
|
|
618 |
|
|
619 int retval; |
|
|
620 do |
|
|
621 { |
|
287
|
622 curr_sym_tab = top_level_sym_tab; |
|
|
623 |
|
1
|
624 reset_parser (); |
|
287
|
625 |
|
1
|
626 retval = yyparse (); |
|
287
|
627 |
|
529
|
628 if (retval == 0 && global_command) |
|
1
|
629 { |
|
|
630 global_command->eval (1); |
|
|
631 delete global_command; |
|
|
632 current_command_number++; |
|
|
633 } |
|
|
634 } |
|
|
635 while (retval == 0); |
|
|
636 |
|
|
637 clean_up_and_exit (retval); |
|
|
638 } |
|
|
639 |
|
529
|
640 DEFUN_TEXT ("casesen", Fcasesen, Scasesen, 2, 1, |
|
|
641 "casesen [on|off]") |
|
|
642 { |
|
|
643 Octave_object retval; |
|
|
644 |
|
|
645 DEFINE_ARGV("casesen"); |
|
|
646 |
|
|
647 if (argc == 1 || (argc > 1 && strcmp (argv[1], "off") == 0)) |
|
|
648 warning ("casesen: sorry, Octave is always case sensitive"); |
|
|
649 else if (argc > 1 && strcmp (argv[1], "on") == 0) |
|
|
650 ; // ok. |
|
|
651 else |
|
|
652 print_usage ("casesen"); |
|
|
653 |
|
|
654 DELETE_ARGV; |
|
|
655 |
|
|
656 return retval; |
|
|
657 } |
|
|
658 |
|
666
|
659 DEFUN ("computer", Fcomputer, Scomputer, 1, 0, |
|
|
660 "computer ():\n\ |
|
|
661 \n\ |
|
|
662 Have Octave ask the system, \"What kind of computer are you?\"") |
|
|
663 { |
|
|
664 Octave_object retval; |
|
|
665 |
|
712
|
666 int nargin = args.length (); |
|
|
667 |
|
|
668 if (nargin != 0) |
|
666
|
669 warning ("computer: ignoring extra arguments"); |
|
|
670 |
|
|
671 ostrstream output_buf; |
|
|
672 |
|
|
673 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
|
|
674 output_buf << "Hi Dave, I'm a HAL-9000"; |
|
|
675 else |
|
|
676 output_buf << TARGET_HOST_TYPE; |
|
|
677 |
|
|
678 if (nargout == 0) |
|
|
679 { |
|
|
680 output_buf << "\n" << ends; |
|
|
681 maybe_page_output (output_buf); |
|
|
682 } |
|
|
683 else |
|
|
684 { |
|
|
685 char *msg = output_buf.str (); |
|
|
686 retval = msg; |
|
|
687 delete [] msg; |
|
|
688 } |
|
|
689 |
|
|
690 return retval; |
|
|
691 } |
|
|
692 |
|
712
|
693 DEFUN ("flops", Fflops, Sflops, 0, 1, |
|
529
|
694 "flops (): count floating point operations") |
|
|
695 { |
|
|
696 int nargin = args.length (); |
|
|
697 |
|
712
|
698 if (nargin > 0) |
|
529
|
699 print_usage ("flops"); |
|
|
700 |
|
|
701 warning ("flops is a flop, always returning zero"); |
|
|
702 |
|
|
703 return 0.0; |
|
|
704 } |
|
|
705 |
|
712
|
706 DEFUN ("quit", Fquit, Squit, 0, 0, |
|
529
|
707 "quit (): exit Octave gracefully") |
|
|
708 { |
|
|
709 Octave_object retval; |
|
|
710 quitting_gracefully = 1; |
|
|
711 clean_up_and_exit (0); |
|
|
712 return retval; |
|
|
713 } |
|
|
714 |
|
549
|
715 DEFALIAS (exit, quit); |
|
|
716 |
|
712
|
717 DEFUN ("warranty", Fwarranty, Swarranty, 0, 0, |
|
529
|
718 "warranty (): describe copying conditions") |
|
|
719 { |
|
|
720 Octave_object retval; |
|
|
721 |
|
|
722 ostrstream output_buf; |
|
|
723 output_buf << "\n Octave, version " << version_string |
|
|
724 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton\n" |
|
|
725 << "\n\ |
|
|
726 This program is free software; you can redistribute it and/or modify\n\ |
|
|
727 it under the terms of the GNU General Public License as published by\n\ |
|
|
728 the Free Software Foundation; either version 2 of the License, or\n\ |
|
|
729 (at your option) any later version.\n\ |
|
|
730 \n\ |
|
|
731 This program is distributed in the hope that it will be useful,\n\ |
|
|
732 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
|
|
733 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
|
|
734 GNU General Public License for more details.\n\ |
|
|
735 \n\ |
|
|
736 You should have received a copy of the GNU General Public License\n\ |
|
|
737 along with this program. If not, write to the Free Software\n\ |
|
|
738 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.\n\ |
|
|
739 \n"; |
|
|
740 |
|
|
741 output_buf << ends; |
|
|
742 maybe_page_output (output_buf); |
|
|
743 |
|
|
744 return retval; |
|
|
745 } |
|
|
746 |
|
|
747 // XXX FIXME XXX -- this may not be the best place for these... |
|
|
748 |
|
|
749 Octave_object |
|
|
750 feval (const Octave_object& args, int nargout) |
|
|
751 { |
|
|
752 Octave_object retval; |
|
|
753 |
|
712
|
754 tree_fvc *fcn = is_valid_function (args(0), "feval", 1); |
|
529
|
755 if (fcn) |
|
|
756 { |
|
712
|
757 int tmp_nargin = args.length () - 1; |
|
565
|
758 Octave_object tmp_args; |
|
712
|
759 tmp_args.resize (tmp_nargin); |
|
|
760 for (int i = 0; i < tmp_nargin; i++) |
|
529
|
761 tmp_args(i) = args(i+1); |
|
|
762 retval = fcn->eval (0, nargout, tmp_args); |
|
|
763 } |
|
|
764 |
|
|
765 return retval; |
|
|
766 } |
|
|
767 |
|
|
768 DEFUN ("feval", Ffeval, Sfeval, -1, 1, |
|
|
769 "feval (NAME, ARGS, ...)\n\ |
|
|
770 \n\ |
|
|
771 evaluate NAME as a function, passing ARGS as its arguments") |
|
|
772 { |
|
|
773 Octave_object retval; |
|
|
774 |
|
|
775 int nargin = args.length (); |
|
|
776 |
|
712
|
777 if (nargin > 0) |
|
529
|
778 retval = feval (args, nargout); |
|
|
779 else |
|
|
780 print_usage ("feval"); |
|
|
781 |
|
|
782 return retval; |
|
|
783 } |
|
|
784 |
|
672
|
785 static Octave_object |
|
529
|
786 eval_string (const char *string, int print, int ans_assign, |
|
672
|
787 int& parse_status, int nargout) |
|
529
|
788 { |
|
|
789 begin_unwind_frame ("eval_string"); |
|
|
790 |
|
|
791 unwind_protect_int (get_input_from_eval_string); |
|
|
792 unwind_protect_ptr (global_command); |
|
|
793 unwind_protect_ptr (current_eval_string); |
|
|
794 |
|
|
795 get_input_from_eval_string = 1; |
|
|
796 current_eval_string = string; |
|
|
797 |
|
|
798 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
799 YY_BUFFER_STATE new_buf = create_buffer (0); |
|
|
800 |
|
|
801 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
|
|
802 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
|
|
803 |
|
|
804 switch_to_buffer (new_buf); |
|
|
805 |
|
|
806 unwind_protect_ptr (curr_sym_tab); |
|
|
807 |
|
|
808 reset_parser (); |
|
|
809 |
|
|
810 parse_status = yyparse (); |
|
|
811 |
|
|
812 // Important to reset the idea of where input is coming from before |
|
|
813 // trying to eval the command we just parsed -- it might contain the |
|
|
814 // name of an function file that still needs to be parsed! |
|
|
815 |
|
578
|
816 tree_statement_list *command = global_command; |
|
529
|
817 |
|
|
818 run_unwind_frame ("eval_string"); |
|
|
819 |
|
672
|
820 Octave_object retval; |
|
529
|
821 |
|
|
822 if (parse_status == 0 && command) |
|
|
823 { |
|
672
|
824 retval = command->eval (print, nargout); |
|
529
|
825 delete command; |
|
|
826 } |
|
|
827 |
|
|
828 return retval; |
|
|
829 } |
|
|
830 |
|
|
831 tree_constant |
|
672
|
832 eval_string (const char *string, int print, int ans_assign, |
|
|
833 int& parse_status) |
|
|
834 { |
|
|
835 tree_constant retval; |
|
|
836 |
|
|
837 Octave_object tmp = eval_string (string, print, ans_assign, |
|
|
838 parse_status, 1); |
|
|
839 |
|
|
840 retval = tmp(0); |
|
|
841 |
|
|
842 return retval; |
|
|
843 } |
|
|
844 |
|
|
845 static Octave_object |
|
|
846 eval_string (const tree_constant& arg, int& parse_status, int nargout) |
|
529
|
847 { |
|
636
|
848 char *string = arg.string_value (); |
|
|
849 |
|
|
850 if (error_state) |
|
529
|
851 { |
|
|
852 error ("eval: expecting string argument"); |
|
672
|
853 return -1.0; |
|
529
|
854 } |
|
|
855 |
|
|
856 // Yes Virginia, we always print here... |
|
|
857 |
|
672
|
858 return eval_string (string, 1, 1, parse_status, nargout); |
|
529
|
859 } |
|
|
860 |
|
712
|
861 DEFUN ("eval", Feval, Seval, 2, 1, |
|
672
|
862 "eval (TRY, CATCH)\n\ |
|
|
863 \n\ |
|
|
864 Evaluate the string TRY as octave code. If that fails, evaluate the\n\ |
|
|
865 string CATCH.") |
|
529
|
866 { |
|
|
867 Octave_object retval; |
|
|
868 |
|
|
869 int nargin = args.length (); |
|
|
870 |
|
712
|
871 if (nargin > 0) |
|
529
|
872 { |
|
672
|
873 begin_unwind_frame ("Feval"); |
|
|
874 |
|
712
|
875 if (nargin > 1) |
|
672
|
876 { |
|
|
877 unwind_protect_int (suppress_octave_error_messages); |
|
|
878 suppress_octave_error_messages = 1; |
|
|
879 } |
|
|
880 |
|
529
|
881 int parse_status = 0; |
|
672
|
882 |
|
712
|
883 retval = eval_string (args(0), parse_status, nargout); |
|
672
|
884 |
|
712
|
885 if (nargin > 1 && (parse_status != 0 || error_state)) |
|
672
|
886 { |
|
|
887 error_state = 0; |
|
712
|
888 eval_string (args(1), parse_status, nargout); |
|
672
|
889 retval = Octave_object (); |
|
|
890 } |
|
|
891 |
|
|
892 run_unwind_frame ("Feval"); |
|
529
|
893 } |
|
|
894 else |
|
|
895 print_usage ("eval"); |
|
|
896 |
|
|
897 return retval; |
|
|
898 } |
|
|
899 |
|
581
|
900 // Execute a shell command. |
|
|
901 |
|
703
|
902 DEFUN ("system", Fsystem, Ssystem, 2, 1, |
|
|
903 "system (string [, return_output]): execute shell commands") |
|
560
|
904 { |
|
|
905 Octave_object retval; |
|
|
906 |
|
|
907 int nargin = args.length (); |
|
|
908 |
|
712
|
909 if (nargin < 1 || nargin > 2) |
|
560
|
910 { |
|
712
|
911 print_usage ("system"); |
|
624
|
912 return retval; |
|
|
913 } |
|
|
914 |
|
712
|
915 tree_constant tc_command = args(0); |
|
624
|
916 |
|
636
|
917 char *tmp_str = tc_command.string_value (); |
|
|
918 |
|
|
919 if (error_state) |
|
624
|
920 { |
|
712
|
921 error ("system: expecting string as first argument"); |
|
636
|
922 } |
|
|
923 else |
|
|
924 { |
|
|
925 iprocstream cmd (tmp_str); |
|
624
|
926 |
|
|
927 ostrstream output_buf; |
|
|
928 |
|
560
|
929 char ch; |
|
|
930 while (cmd.get (ch)) |
|
|
931 output_buf.put (ch); |
|
624
|
932 |
|
560
|
933 output_buf << ends; |
|
624
|
934 |
|
560
|
935 int status = cmd.close (); |
|
624
|
936 |
|
712
|
937 if (nargout > 0 || nargin > 1) |
|
560
|
938 { |
|
624
|
939 char *msg = output_buf.str (); |
|
|
940 |
|
|
941 retval(1) = (double) status; |
|
|
942 retval(0) = msg; |
|
|
943 |
|
|
944 delete [] msg; |
|
560
|
945 } |
|
624
|
946 else |
|
|
947 maybe_page_output (output_buf); |
|
560
|
948 } |
|
|
949 |
|
|
950 return retval; |
|
|
951 } |
|
|
952 |
|
703
|
953 DEFALIAS (shell_cmd, system); |
|
|
954 |
|
560
|
955 /* |
|
1
|
956 ;;; Local Variables: *** |
|
|
957 ;;; mode: C++ *** |
|
|
958 ;;; page-delimiter: "^/\\*" *** |
|
|
959 ;;; End: *** |
|
|
960 */ |
