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1
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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 <setjmp.h> |
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38 #include <stdlib.h> |
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39 #include <string.h> |
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40 #include <signal.h> |
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41 #include <assert.h> |
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42 #include <iostream.h> |
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529
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43 #include <strstream.h> |
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44 #include <fstream.h> |
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45 |
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46 #include "getopt.h" |
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47 |
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240
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48 #include "lo-error.h" |
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49 |
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50 #include "sighandlers.h" |
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51 #include "variables.h" |
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52 #include "error.h" |
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578
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53 #include "tree-misc.h" |
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54 #include "tree-const.h" |
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529
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55 #include "tree-plot.h" |
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56 #include "utils.h" |
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57 #include "input.h" |
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58 #include "pager.h" |
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59 #include "lex.h" |
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542
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60 #include "help.h" |
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61 #include "octave.h" |
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62 #include "parse.h" |
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562
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63 #include "procstream.h" |
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64 #include "unwind-prot.h" |
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65 #include "octave-hist.h" |
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529
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66 #include "builtins.h" |
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67 #include "version.h" |
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68 #include "file-io.h" |
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69 #include "sysdep.h" |
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529
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70 #include "defun.h" |
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71 |
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318
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72 #if !defined (HAVE_ATEXIT) && defined (HAVE_ON_EXIT) |
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73 extern "C" { int on_exit (); } |
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74 #define atexit on_exit |
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75 #endif |
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76 |
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77 // argv[0] for this program. |
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529
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78 char *raw_prog_name = 0; |
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79 |
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80 // Cleaned-up name of this program, not including path information. |
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529
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81 char *prog_name = 0; |
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82 |
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83 // Login name for user running this program. |
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529
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84 char *user_name = 0; |
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85 |
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86 // Name of the host we are running on. |
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529
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87 char *host_name = 0; |
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88 |
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89 // User's home directory. |
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529
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90 char *home_directory = 0; |
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91 |
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92 // Guess what? |
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93 char *the_current_working_directory = 0; |
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94 |
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95 // Load path specified on command line. |
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529
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96 char *load_path = 0; |
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97 |
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186
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98 // Name of the info file specified on command line. |
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99 char *info_file = 0; |
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100 |
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195
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101 // Name of the editor to be invoked by the edit_history command. |
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102 char *editor = 0; |
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103 |
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104 // If nonzero, don't do fancy line editing. |
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105 int no_line_editing = 0; |
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106 |
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107 // Command number, counting from the beginning of this session. |
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108 int current_command_number = 1; |
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109 |
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110 // Nonzero means we are exiting via the builtin exit or quit functions. |
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111 int quitting_gracefully = 0; |
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112 |
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113 // Current command to execute. |
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114 tree_statement_list *global_command = 0; |
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115 |
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206
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116 // Pointer to function that is currently being evaluated. |
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117 tree_function *curr_function = 0; |
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118 |
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119 // Nonzero means input is coming from startup file. |
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120 int input_from_startup_file = 0; |
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121 |
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122 // Top level context (?) |
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123 jmp_buf toplevel; |
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124 |
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195
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125 // This is not really the right place to do this... |
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126 typedef void (*one_arg_error_handler_t) (const char*); |
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127 extern one_arg_error_handler_t set_Complex_error_handler |
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128 (one_arg_error_handler_t f); |
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129 |
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287
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130 // This is from readline's paren.c: |
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131 extern int rl_blink_matching_paren; |
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132 |
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195
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133 static void |
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134 octave_Complex_error_handler (const char* msg) |
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135 { |
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136 warning (msg); |
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137 } |
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138 |
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1
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139 // Nonzero means we read ~/.octaverc and ./.octaverc. |
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140 static int read_init_files = 1; |
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141 |
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578
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142 // Nonzero means we printed messages about reading startup files. |
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143 static int reading_startup_message_printed = 0; |
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144 |
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145 // Nonzero means we don\'t print the usual startup message. |
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146 static int inhibit_startup_message = 0; |
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147 |
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148 // Usage message |
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139
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149 static const char *usage_string = |
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150 "octave [-?dfhiqvx] [-p path] [--debug] [--help] [--interactive]\n\ |
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186
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151 [--info-file file] [--norc] [--path path] [--quiet] [--version]\n\ |
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152 [--echo-commands] [file]"; |
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153 |
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154 // This is here so that it\'s more likely that the usage message and |
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155 // the real set of options will agree. |
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156 static const char *short_opts = "?dfhip:qvx"; |
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157 |
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158 // Long options. |
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186
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159 #define INFO_FILE_OPTION 1 |
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160 static struct option long_opts[] = |
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161 { |
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162 { "debug", 0, 0, 'd' }, |
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163 { "help", 0, 0, 'h' }, |
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164 { "interactive", 0, 0, 'i' }, |
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165 { "info-file", 1, 0, INFO_FILE_OPTION }, |
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166 { "norc", 0, 0, 'f' }, |
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167 { "path", 1, 0, 'p' }, |
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168 { "quiet", 0, 0, 'q' }, |
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169 { "version", 0, 0, 'v' }, |
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170 { "echo-commands", 0, 0, 'x' }, |
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171 { 0, 0, 0, 0 } |
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172 }; |
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173 |
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174 // Initialize some global variables for later use. |
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175 |
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176 static void |
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177 initialize_globals (char *name) |
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178 { |
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179 struct passwd *entry = getpwuid (getuid ()); |
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180 if (entry) |
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181 user_name = strsave (entry->pw_name); |
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182 else |
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183 user_name = strsave ("I have no name!"); |
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184 endpwent (); |
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185 |
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186 char hostname[256]; |
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187 if (gethostname (hostname, 255) < 0) |
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188 host_name = strsave ("I have no host!"); |
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189 else |
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190 host_name = strsave (hostname); |
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191 |
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192 char *hd = getenv ("HOME"); |
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529
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193 if (hd) |
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194 home_directory = strsave (hd); |
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195 else |
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196 home_directory = strsave ("I have no home!"); |
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197 |
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198 raw_prog_name = strsave (name); |
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199 prog_name = strsave ("octave"); |
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200 |
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201 load_path = default_path (); |
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186
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202 |
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203 info_file = default_info_file (); |
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195
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204 |
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205 editor = default_editor (); |
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206 } |
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207 |
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208 void |
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209 parse_and_execute (FILE *f, int print) |
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210 { |
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211 begin_unwind_frame ("parse_and_execute"); |
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212 |
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213 YY_BUFFER_STATE old_buf = current_buffer (); |
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214 YY_BUFFER_STATE new_buf = create_buffer (f); |
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215 |
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216 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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217 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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218 |
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219 switch_to_buffer (new_buf); |
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220 |
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221 unwind_protect_int (echo_input); |
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222 unwind_protect_int (using_readline); |
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223 unwind_protect_int (saving_history); |
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224 |
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225 echo_input = 0; |
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226 using_readline = 0; |
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227 saving_history = 0; |
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228 |
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229 unwind_protect_ptr (curr_sym_tab); |
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230 |
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231 int retval; |
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232 do |
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233 { |
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234 reset_parser (); |
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235 retval = yyparse (); |
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236 if (retval == 0 && global_command) |
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237 { |
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238 global_command->eval (print); |
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239 delete global_command; |
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240 } |
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241 } |
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242 while (retval == 0); |
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243 |
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244 run_unwind_frame ("parse_and_execute"); |
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245 } |
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246 |
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247 void |
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248 parse_and_execute (char *s, int print, int verbose) |
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249 { |
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250 begin_unwind_frame ("parse_and_execute_2"); |
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251 |
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252 unwind_protect_int (reading_script_file); |
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253 |
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254 reading_script_file = 1; |
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255 |
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256 FILE *f = get_input_from_file (s, 0); |
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257 if (f) |
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258 { |
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259 unwind_protect_int (input_line_number); |
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260 unwind_protect_int (current_input_column); |
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261 unwind_protect_int (echo_input); |
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262 |
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263 input_line_number = 0; |
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264 current_input_column = 1; |
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265 echo_input = 0; |
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266 |
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578
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267 if (verbose) |
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268 { |
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269 cout << "Reading commands from " << s << " ... "; |
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270 reading_startup_message_printed = 1; |
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271 cout.flush (); |
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272 } |
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273 |
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274 parse_and_execute (f, print); |
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275 |
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276 if (verbose) |
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277 cout << "done." << endl; |
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278 } |
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279 |
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280 run_unwind_frame ("parse_and_execute_2"); |
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281 } |
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282 |
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283 // Initialize by reading startup files. |
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284 |
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285 static void |
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286 execute_startup_files (void) |
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287 { |
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315
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288 begin_unwind_frame ("execute_startup_files"); |
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289 |
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290 unwind_protect_int (input_from_startup_file); |
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291 input_from_startup_file = 1; |
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292 |
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293 int verbose = ! inhibit_startup_message; |
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294 |
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1
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295 // Execute commands from the site-wide configuration file. |
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296 |
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297 char *sd = get_site_defaults (); |
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298 |
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578
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299 parse_and_execute (sd, 0, verbose); |
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300 |
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301 // Try to execute commands from $HOME/.octaverc and ./.octaverc. |
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302 |
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529
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303 char *home_rc = 0; |
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304 if (home_directory) |
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305 { |
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306 home_rc = strconcat (home_directory, "/.octaverc"); |
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307 parse_and_execute (home_rc, 0, verbose); |
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308 } |
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309 |
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85
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310 // Names alone are not enough. |
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311 |
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312 struct stat home_rc_statbuf; |
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313 stat (home_rc, &home_rc_statbuf); |
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314 delete [] home_rc; |
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315 |
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316 struct stat dot_rc_statbuf; |
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317 stat ("./.octaverc", &dot_rc_statbuf); |
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318 |
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319 if (home_rc_statbuf.st_ino != dot_rc_statbuf.st_ino) |
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320 parse_and_execute ("./.octaverc", 0, verbose); |
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315
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321 |
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322 run_unwind_frame ("execute_startup_files"); |
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323 } |
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324 |
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581
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325 // Usage message with extra help. |
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326 |
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327 static void |
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328 verbose_usage (void) |
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329 { |
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330 cout << "\n" |
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331 << " Octave, version " << version_string |
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268
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332 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
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1
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333 << " This is free software with ABSOLUTELY NO WARRANTY.\n" |
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334 << "\n" |
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139
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335 << " usage: " << usage_string |
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336 << "\n\n" |
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1
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337 << " d : enter parser debugging mode\n" |
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338 << " f : don't read ~/.octaverc or .octaverc at startup\n" |
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339 << " h|? : print short help message and exit\n" |
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340 << " i : force interactive behavior\n" |
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341 << " q : don't print message at startup\n" |
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139
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342 << " v : print version number and exit\n" |
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1
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343 << " x : echo commands as they are executed\n" |
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344 << "\n" |
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345 << " file : execute commands from named file\n" |
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285
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346 << "\n"; |
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347 |
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1
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348 exit (1); |
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349 } |
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350 |
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581
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351 // Terse usage messsage. |
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352 |
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1
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353 static void |
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354 usage (void) |
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355 { |
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139
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356 cerr << "usage: " << usage_string << "\n"; |
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1
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357 exit (1); |
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358 } |
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359 |
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581
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360 // Fix up things before exiting. |
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361 |
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195
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362 void |
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1
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363 clean_up_and_exit (int retval) |
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364 { |
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365 raw_mode (0); |
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176
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366 |
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1
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367 clean_up_history (); |
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176
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368 |
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1
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369 close_plot_stream (); |
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176
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370 |
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581
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371 close_diary_file (); |
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372 |
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1
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373 close_files (); |
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374 |
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318
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375 cleanup_tmp_files (); |
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376 |
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1
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377 if (!quitting_gracefully && (interactive || forced_interactive)) |
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378 cout << "\n"; |
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379 |
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380 if (retval == EOF) |
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381 retval = 0; |
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382 |
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383 exit (retval); |
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195
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384 |
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385 // This is bogus but should prevent g++ from giving a warning saying |
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386 // that this volatile function does return. |
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387 |
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388 panic_impossible (); |
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1
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389 } |
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390 |
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391 static void |
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392 print_version_and_exit (void) |
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393 { |
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394 cout << "octave, version " << version_string << "\n"; |
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395 exit (0); |
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396 } |
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397 |
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581
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398 // You guessed it. |
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399 |
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1
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400 int |
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401 main (int argc, char **argv) |
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402 { |
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403 // Allow for system dependent initialization. See sysdep.cc for more |
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404 // details. |
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405 sysdep_init (); |
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406 |
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195
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407 // This is not really the right place to do this... |
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408 set_Complex_error_handler (octave_Complex_error_handler); |
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409 |
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223
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410 // Or this, probably... |
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411 set_liboctave_error_handler (error); |
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412 |
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1
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413 // Do this first, since some command line arguments may override the |
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414 // defaults. |
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415 initialize_globals (argv[0]); |
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416 |
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139
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417 int optc; |
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418 while ((optc = getopt_long (argc, argv, short_opts, long_opts, 0)) != EOF) |
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1
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419 { |
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139
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420 switch (optc) |
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1
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421 { |
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422 case 'd': |
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423 yydebug++; |
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424 break; |
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425 case 'f': |
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426 read_init_files = 0; |
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427 break; |
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428 case 'h': |
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429 case '?': |
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430 verbose_usage (); |
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431 break; |
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432 case 'i': |
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433 forced_interactive = 1; |
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434 break; |
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435 case 'p': |
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529
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436 if (optarg) |
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139
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437 load_path = strsave (optarg); |
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1
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438 break; |
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439 case 'q': |
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440 inhibit_startup_message = 1; |
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441 break; |
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442 case 'x': |
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443 echo_input = 1; |
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444 break; |
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445 case 'v': |
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446 print_version_and_exit (); |
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447 break; |
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186
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448 case INFO_FILE_OPTION: |
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529
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449 if (optarg) |
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186
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450 info_file = strsave (optarg); |
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451 break; |
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1
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452 default: |
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453 usage (); |
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454 break; |
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455 } |
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456 } |
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457 |
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318
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458 #if defined (HAVE_ATEXIT) || (HAVE_ON_EXIT) |
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459 // Make sure we clean up when we exit. If we don't have atexit or |
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460 // on_exit, we're going to leave some junk files around if we exit |
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461 // abnormally. |
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1
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462 atexit (cleanup_tmp_files); |
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318
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463 #endif |
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1
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464 |
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581
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465 initialize_pager (); |
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466 |
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1
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467 initialize_history (); |
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468 |
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469 initialize_file_io (); |
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470 |
|
581
|
471 initialize_symbol_tables (); |
|
1
|
472 |
|
|
473 install_builtins (); |
|
|
474 |
|
315
|
475 initialize_readline (); |
|
|
476 |
|
|
477 install_signal_handlers (); |
|
|
478 |
|
578
|
479 if (! inhibit_startup_message) |
|
|
480 cout << "Octave, version " << version_string |
|
|
481 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
|
|
482 << "This is free software with ABSOLUTELY NO WARRANTY.\n" |
|
|
483 << "For details, type `warranty'.\n" << endl; |
|
|
484 |
|
1
|
485 if (read_init_files) |
|
|
486 { |
|
|
487 saving_history = 0; |
|
|
488 execute_startup_files (); |
|
|
489 saving_history = 1; |
|
|
490 } |
|
|
491 |
|
578
|
492 if (! inhibit_startup_message && reading_startup_message_printed) |
|
|
493 cout << endl; |
|
|
494 |
|
1
|
495 // Avoid counting commands executed from startup files. |
|
|
496 current_command_number = 1; |
|
|
497 |
|
|
498 // If there is an extra argument, see if it names a file to read. |
|
|
499 |
|
149
|
500 int remaining_args = argc - optind; |
|
|
501 if (remaining_args > 1) |
|
|
502 { |
|
|
503 usage (); |
|
|
504 } |
|
|
505 else if (remaining_args == 1) |
|
1
|
506 { |
|
139
|
507 FILE *infile = get_input_from_file (argv[optind]); |
|
529
|
508 if (infile) |
|
287
|
509 { |
|
|
510 rl_blink_matching_paren = 0; |
|
|
511 switch_to_buffer (create_buffer (infile)); |
|
|
512 } |
|
529
|
513 else |
|
|
514 clean_up_and_exit (1); |
|
1
|
515 } |
|
|
516 else |
|
|
517 { |
|
149
|
518 switch_to_buffer (create_buffer (get_input_from_stdin ())); |
|
|
519 |
|
1
|
520 // Is input coming from a terminal? If so, we are probably |
|
|
521 // interactive. |
|
|
522 |
|
|
523 interactive = (isatty (fileno (stdin)) && isatty (fileno (stdout))); |
|
|
524 } |
|
|
525 |
|
|
526 // Force input to be echoed if not really interactive, but the user |
|
|
527 // has forced interactive behavior. |
|
|
528 |
|
|
529 if (!interactive && forced_interactive) |
|
287
|
530 { |
|
|
531 rl_blink_matching_paren = 0; |
|
|
532 echo_input = 1; |
|
|
533 } |
|
1
|
534 |
|
|
535 if (! (interactive || forced_interactive)) |
|
|
536 using_readline = 0; |
|
|
537 |
|
|
538 // Allow the user to interrupt us without exiting. |
|
|
539 |
|
|
540 volatile sig_handler *saved_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
541 |
|
|
542 if (setjmp (toplevel) != 0) |
|
|
543 { |
|
|
544 raw_mode (0); |
|
176
|
545 |
|
1
|
546 cout << "\n"; |
|
|
547 } |
|
|
548 |
|
|
549 can_interrupt = 1; |
|
|
550 |
|
|
551 signal (SIGINT, saved_sigint_handler); |
|
|
552 |
|
|
553 // The big loop. |
|
|
554 |
|
|
555 int retval; |
|
|
556 do |
|
|
557 { |
|
287
|
558 curr_sym_tab = top_level_sym_tab; |
|
|
559 |
|
1
|
560 reset_parser (); |
|
287
|
561 |
|
1
|
562 retval = yyparse (); |
|
287
|
563 |
|
529
|
564 if (retval == 0 && global_command) |
|
1
|
565 { |
|
|
566 global_command->eval (1); |
|
|
567 delete global_command; |
|
|
568 current_command_number++; |
|
|
569 } |
|
|
570 } |
|
|
571 while (retval == 0); |
|
|
572 |
|
|
573 clean_up_and_exit (retval); |
|
|
574 } |
|
|
575 |
|
529
|
576 DEFUN_TEXT ("casesen", Fcasesen, Scasesen, 2, 1, |
|
|
577 "casesen [on|off]") |
|
|
578 { |
|
|
579 Octave_object retval; |
|
|
580 |
|
|
581 DEFINE_ARGV("casesen"); |
|
|
582 |
|
|
583 if (argc == 1 || (argc > 1 && strcmp (argv[1], "off") == 0)) |
|
|
584 warning ("casesen: sorry, Octave is always case sensitive"); |
|
|
585 else if (argc > 1 && strcmp (argv[1], "on") == 0) |
|
|
586 ; // ok. |
|
|
587 else |
|
|
588 print_usage ("casesen"); |
|
|
589 |
|
|
590 DELETE_ARGV; |
|
|
591 |
|
|
592 return retval; |
|
|
593 } |
|
|
594 |
|
|
595 DEFUN ("flops", Fflops, Sflops, 2, 1, |
|
|
596 "flops (): count floating point operations") |
|
|
597 { |
|
|
598 int nargin = args.length (); |
|
|
599 |
|
|
600 if (nargin > 2) |
|
|
601 print_usage ("flops"); |
|
|
602 |
|
|
603 warning ("flops is a flop, always returning zero"); |
|
|
604 |
|
|
605 return 0.0; |
|
|
606 } |
|
|
607 |
|
|
608 DEFUN ("quit", Fquit, Squit, 1, 0, |
|
|
609 "quit (): exit Octave gracefully") |
|
|
610 { |
|
|
611 Octave_object retval; |
|
|
612 quitting_gracefully = 1; |
|
|
613 clean_up_and_exit (0); |
|
|
614 return retval; |
|
|
615 } |
|
|
616 |
|
549
|
617 DEFALIAS (exit, quit); |
|
|
618 |
|
529
|
619 DEFUN ("warranty", Fwarranty, Swarranty, 1, 0, |
|
|
620 "warranty (): describe copying conditions") |
|
|
621 { |
|
|
622 Octave_object retval; |
|
|
623 |
|
|
624 ostrstream output_buf; |
|
|
625 output_buf << "\n Octave, version " << version_string |
|
|
626 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton\n" |
|
|
627 << "\n\ |
|
|
628 This program is free software; you can redistribute it and/or modify\n\ |
|
|
629 it under the terms of the GNU General Public License as published by\n\ |
|
|
630 the Free Software Foundation; either version 2 of the License, or\n\ |
|
|
631 (at your option) any later version.\n\ |
|
|
632 \n\ |
|
|
633 This program is distributed in the hope that it will be useful,\n\ |
|
|
634 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
|
|
635 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
|
|
636 GNU General Public License for more details.\n\ |
|
|
637 \n\ |
|
|
638 You should have received a copy of the GNU General Public License\n\ |
|
|
639 along with this program. If not, write to the Free Software\n\ |
|
|
640 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.\n\ |
|
|
641 \n"; |
|
|
642 |
|
|
643 output_buf << ends; |
|
|
644 maybe_page_output (output_buf); |
|
|
645 |
|
|
646 return retval; |
|
|
647 } |
|
|
648 |
|
|
649 // XXX FIXME XXX -- this may not be the best place for these... |
|
|
650 |
|
|
651 Octave_object |
|
|
652 feval (const Octave_object& args, int nargout) |
|
|
653 { |
|
|
654 Octave_object retval; |
|
|
655 |
|
|
656 tree_fvc *fcn = is_valid_function (args(1), "feval", 1); |
|
|
657 if (fcn) |
|
|
658 { |
|
|
659 int nargin = args.length () - 1; |
|
565
|
660 Octave_object tmp_args; |
|
|
661 tmp_args.resize (nargin); |
|
529
|
662 for (int i = 0; i < nargin; i++) |
|
|
663 tmp_args(i) = args(i+1); |
|
|
664 retval = fcn->eval (0, nargout, tmp_args); |
|
|
665 } |
|
|
666 |
|
|
667 return retval; |
|
|
668 } |
|
|
669 |
|
|
670 DEFUN ("feval", Ffeval, Sfeval, -1, 1, |
|
|
671 "feval (NAME, ARGS, ...)\n\ |
|
|
672 \n\ |
|
|
673 evaluate NAME as a function, passing ARGS as its arguments") |
|
|
674 { |
|
|
675 Octave_object retval; |
|
|
676 |
|
|
677 int nargin = args.length (); |
|
|
678 |
|
|
679 if (nargin > 1) |
|
|
680 retval = feval (args, nargout); |
|
|
681 else |
|
|
682 print_usage ("feval"); |
|
|
683 |
|
|
684 return retval; |
|
|
685 } |
|
|
686 |
|
|
687 tree_constant |
|
|
688 eval_string (const char *string, int print, int ans_assign, |
|
|
689 int& parse_status) |
|
|
690 { |
|
|
691 begin_unwind_frame ("eval_string"); |
|
|
692 |
|
|
693 unwind_protect_int (get_input_from_eval_string); |
|
|
694 unwind_protect_ptr (global_command); |
|
|
695 unwind_protect_ptr (current_eval_string); |
|
|
696 |
|
|
697 get_input_from_eval_string = 1; |
|
|
698 current_eval_string = string; |
|
|
699 |
|
|
700 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
701 YY_BUFFER_STATE new_buf = create_buffer (0); |
|
|
702 |
|
|
703 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
|
|
704 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
|
|
705 |
|
|
706 switch_to_buffer (new_buf); |
|
|
707 |
|
|
708 unwind_protect_ptr (curr_sym_tab); |
|
|
709 |
|
|
710 reset_parser (); |
|
|
711 |
|
|
712 parse_status = yyparse (); |
|
|
713 |
|
|
714 // Important to reset the idea of where input is coming from before |
|
|
715 // trying to eval the command we just parsed -- it might contain the |
|
|
716 // name of an function file that still needs to be parsed! |
|
|
717 |
|
578
|
718 tree_statement_list *command = global_command; |
|
529
|
719 |
|
|
720 run_unwind_frame ("eval_string"); |
|
|
721 |
|
|
722 tree_constant retval; |
|
|
723 |
|
|
724 if (parse_status == 0 && command) |
|
|
725 { |
|
|
726 retval = command->eval (print); |
|
|
727 delete command; |
|
|
728 } |
|
|
729 |
|
|
730 return retval; |
|
|
731 } |
|
|
732 |
|
|
733 tree_constant |
|
|
734 eval_string (const tree_constant& arg, int& parse_status) |
|
|
735 { |
|
|
736 if (! arg.is_string_type ()) |
|
|
737 { |
|
|
738 error ("eval: expecting string argument"); |
|
|
739 return -1; |
|
|
740 } |
|
|
741 |
|
|
742 char *string = arg.string_value (); |
|
|
743 |
|
|
744 // Yes Virginia, we always print here... |
|
|
745 |
|
|
746 return eval_string (string, 1, 1, parse_status); |
|
|
747 } |
|
|
748 |
|
|
749 DEFUN ("eval", Feval, Seval, 2, 1, |
|
|
750 "eval (STRING): evaluate STRING as octave code") |
|
|
751 { |
|
|
752 Octave_object retval; |
|
|
753 |
|
|
754 int nargin = args.length (); |
|
|
755 |
|
|
756 if (nargin == 2) |
|
|
757 { |
|
|
758 int parse_status = 0; |
|
|
759 retval = eval_string (args(1), parse_status); |
|
|
760 } |
|
|
761 else |
|
|
762 print_usage ("eval"); |
|
|
763 |
|
|
764 return retval; |
|
|
765 } |
|
|
766 |
|
581
|
767 // Execute a shell command. |
|
|
768 |
|
560
|
769 DEFUN ("shell_cmd", Fshell_cmd, Sshell_cmd, 2, 1, |
|
|
770 "shell_cmd (string [, return_output]): execute shell commands") |
|
|
771 { |
|
|
772 Octave_object retval; |
|
|
773 |
|
|
774 int nargin = args.length (); |
|
|
775 |
|
|
776 if (nargin == 2 && args(1).is_string_type ()) |
|
|
777 { |
|
|
778 iprocstream cmd (args(1).string_value ()); |
|
|
779 char ch; |
|
|
780 ostrstream output_buf; |
|
|
781 while (cmd.get (ch)) |
|
|
782 output_buf.put (ch); |
|
|
783 output_buf << ends; |
|
|
784 int status = cmd.close (); |
|
|
785 switch (nargout) |
|
|
786 { |
|
|
787 case 1: |
|
|
788 maybe_page_output (output_buf); |
|
|
789 retval.resize (1); |
|
|
790 retval(0) = tree_constant ((double) status); |
|
|
791 break; |
|
|
792 case 2: |
|
|
793 retval.resize (2); |
|
|
794 retval(0) = tree_constant ((double) status); |
|
|
795 retval(1) = tree_constant (output_buf.str ()); |
|
|
796 break; |
|
|
797 break; |
|
|
798 } |
|
|
799 } |
|
|
800 else |
|
|
801 print_usage ("shell_cmd"); |
|
|
802 |
|
|
803 return retval; |
|
|
804 } |
|
|
805 |
|
|
806 /* |
|
1
|
807 ;;; Local Variables: *** |
|
|
808 ;;; mode: C++ *** |
|
|
809 ;;; page-delimiter: "^/\\*" *** |
|
|
810 ;;; End: *** |
|
|
811 */ |
