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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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85
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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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43 #include <fstream.h> |
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139
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44 |
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45 #include "getopt.h" |
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46 |
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240
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47 #include "lo-error.h" |
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223
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48 |
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49 #include "sighandlers.h" |
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50 #include "variables.h" |
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51 #include "error.h" |
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52 #include "tree-const.h" |
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53 #include "utils.h" |
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54 #include "builtins.h" |
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55 #include "input.h" |
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56 #include "pager.h" |
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57 #include "lex.h" |
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58 #include "octave.h" |
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59 #include "parse.h" |
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60 #include "unwind-prot.h" |
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61 #include "octave-hist.h" |
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62 #include "version.h" |
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63 #include "file-io.h" |
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64 #include "sysdep.h" |
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65 |
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66 #ifdef sun |
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67 extern "C" { int on_exit (); } |
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68 #define atexit on_exit |
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69 #endif |
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70 |
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71 // argv[0] for this program. |
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72 char *raw_prog_name = (char *) NULL; |
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73 |
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74 // Cleaned-up name of this program, not including path information. |
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75 char *prog_name = (char *) NULL; |
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76 |
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77 // Login name for user running this program. |
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78 char *user_name = (char *) NULL; |
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79 |
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80 // Name of the host we are running on. |
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81 char *host_name = (char *) NULL; |
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82 |
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83 // User's home directory. |
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84 char *home_directory = (char *) NULL; |
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85 |
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86 // Guess what? |
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87 char *the_current_working_directory = (char *) NULL; |
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88 |
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89 // Load path specified on command line. |
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90 char *load_path = (char *) NULL; |
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91 |
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186
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92 // Name of the info file specified on command line. |
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93 char *info_file = (char *) NULL; |
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94 |
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195
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95 // Name of the editor to be invoked by the edit_history command. |
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96 char *editor = (char *) NULL; |
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97 |
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98 // If nonzero, don't do fancy line editing. |
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99 int no_line_editing = 0; |
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100 |
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101 // Command number, counting from the beginning of this session. |
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102 int current_command_number = 1; |
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103 |
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104 // Nonzero means we are exiting via the builtin exit or quit functions. |
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105 int quitting_gracefully = 0; |
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106 |
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107 // Current command to execute. |
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108 tree *global_command = (tree *) NULL; |
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109 |
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206
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110 // Pointer to function that is currently being evaluated. |
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111 tree_function *curr_function = (tree_function *) NULL; |
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112 |
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315
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113 // Nonzero means input is coming from startup file. |
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114 int input_from_startup_file = 0; |
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115 |
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116 // Top level context (?) |
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117 jmp_buf toplevel; |
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118 |
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195
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119 // This is not really the right place to do this... |
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120 typedef void (*one_arg_error_handler_t) (const char*); |
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121 extern one_arg_error_handler_t set_Complex_error_handler |
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122 (one_arg_error_handler_t f); |
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123 |
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287
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124 // This is from readline's paren.c: |
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125 extern int rl_blink_matching_paren; |
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126 |
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195
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127 static void |
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128 octave_Complex_error_handler (const char* msg) |
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129 { |
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130 warning (msg); |
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131 } |
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132 |
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133 // Nonzero means we read ~/.octaverc and ./.octaverc. |
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134 static int read_init_files = 1; |
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135 |
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136 // Nonzero means we don\'t print the usual startup message. |
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137 static int inhibit_startup_message = 0; |
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138 |
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139 // Usage message |
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139
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140 static const char *usage_string = |
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141 "octave [-?dfhiqvx] [-p path] [--debug] [--help] [--interactive]\n\ |
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186
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142 [--info-file file] [--norc] [--path path] [--quiet] [--version]\n\ |
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143 [--echo-commands] [file]"; |
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144 |
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145 // This is here so that it\'s more likely that the usage message and |
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146 // the real set of options will agree. |
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139
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147 static const char *short_opts = "?dfhip:qvx"; |
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148 |
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149 // Long options. |
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186
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150 #define INFO_FILE_OPTION 1 |
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151 static struct option long_opts[] = |
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152 { |
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153 { "debug", 0, 0, 'd' }, |
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154 { "help", 0, 0, 'h' }, |
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155 { "interactive", 0, 0, 'i' }, |
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156 { "info-file", 1, 0, INFO_FILE_OPTION }, |
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157 { "norc", 0, 0, 'f' }, |
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158 { "path", 1, 0, 'p' }, |
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159 { "quiet", 0, 0, 'q' }, |
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160 { "version", 0, 0, 'v' }, |
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161 { "echo-commands", 0, 0, 'x' }, |
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162 { 0, 0, 0, 0 } |
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163 }; |
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164 |
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165 /* |
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166 * Initialize some global variables for later use. |
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167 */ |
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168 static void |
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169 initialize_globals (char *name) |
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170 { |
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171 struct passwd *entry = getpwuid (getuid ()); |
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172 if (entry) |
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173 user_name = strsave (entry->pw_name); |
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174 else |
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175 user_name = strsave ("I have no name!"); |
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176 endpwent (); |
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177 |
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178 char hostname[256]; |
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179 if (gethostname (hostname, 255) < 0) |
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180 host_name = strsave ("I have no host!"); |
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181 else |
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182 host_name = strsave (hostname); |
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183 |
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184 char *hd = getenv ("HOME"); |
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185 if (hd == (char *) NULL) |
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186 home_directory = strsave ("I have no home~!"); |
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187 else |
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188 home_directory = strsave (hd); |
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189 |
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190 raw_prog_name = strsave (name); |
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191 prog_name = strsave ("octave"); |
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192 |
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193 load_path = default_path (); |
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186
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194 |
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195 info_file = default_info_file (); |
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195
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196 |
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197 editor = default_editor (); |
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198 } |
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199 |
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200 void |
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201 parse_and_execute (FILE *f, int print) |
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202 { |
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203 begin_unwind_frame ("parse_and_execute"); |
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204 |
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205 YY_BUFFER_STATE old_buf = current_buffer (); |
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206 YY_BUFFER_STATE new_buf = create_buffer (f); |
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207 |
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208 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
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209 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
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210 |
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211 switch_to_buffer (new_buf); |
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212 |
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213 unwind_protect_int (echo_input); |
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214 unwind_protect_int (using_readline); |
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215 unwind_protect_int (saving_history); |
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216 |
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217 echo_input = 0; |
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218 using_readline = 0; |
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219 saving_history = 0; |
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220 |
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221 unwind_protect_ptr (curr_sym_tab); |
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222 |
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223 int retval; |
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224 do |
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225 { |
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226 reset_parser (); |
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227 retval = yyparse (); |
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228 if (retval == 0 && global_command != NULL_TREE) |
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229 { |
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230 global_command->eval (print); |
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231 delete global_command; |
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232 } |
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233 } |
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234 while (retval == 0); |
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235 |
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236 run_unwind_frame ("parse_and_execute"); |
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237 } |
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238 |
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239 void |
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240 parse_and_execute (char *s, int print) |
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241 { |
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242 begin_unwind_frame ("parse_and_execute_2"); |
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243 |
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244 unwind_protect_int (reading_script_file); |
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245 |
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246 reading_script_file = 1; |
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247 |
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248 FILE *f = get_input_from_file (s, 0); |
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249 if (f != (FILE *) NULL) |
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250 { |
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251 unwind_protect_int (input_line_number); |
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252 unwind_protect_int (current_input_column); |
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253 unwind_protect_int (echo_input); |
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254 |
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255 input_line_number = 0; |
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256 current_input_column = 1; |
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257 echo_input = 0; |
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258 |
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259 parse_and_execute (f, print); |
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260 } |
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261 |
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262 run_unwind_frame ("parse_and_execute_2"); |
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263 } |
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264 |
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265 /* |
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266 * Initialize by reading startup files. |
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267 */ |
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268 static void |
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269 execute_startup_files (void) |
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270 { |
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315
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271 begin_unwind_frame ("execute_startup_files"); |
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272 |
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273 unwind_protect_int (input_from_startup_file); |
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274 input_from_startup_file = 1; |
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275 |
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276 // Execute commands from the site-wide configuration file. |
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277 |
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278 char *sd = get_site_defaults (); |
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279 |
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280 parse_and_execute (sd, 0); |
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281 |
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282 // Try to execute commands from $HOME/.octaverc and ./.octaverc. |
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283 |
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284 char *home_rc = (char *) NULL; |
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285 if (home_directory != NULL) |
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286 { |
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287 home_rc = strconcat (home_directory, "/.octaverc"); |
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288 parse_and_execute (home_rc, 0); |
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289 } |
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290 |
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291 // Names alone are not enough. |
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292 |
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293 struct stat home_rc_statbuf; |
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294 stat (home_rc, &home_rc_statbuf); |
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295 delete [] home_rc; |
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296 |
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297 struct stat dot_rc_statbuf; |
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298 stat ("./.octaverc", &dot_rc_statbuf); |
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299 |
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300 if (home_rc_statbuf.st_ino != dot_rc_statbuf.st_ino) |
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301 parse_and_execute ("./.octaverc", 0); |
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315
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302 |
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303 run_unwind_frame ("execute_startup_files"); |
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304 } |
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305 |
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306 /* |
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307 * Usage message with extra help. |
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308 */ |
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309 static void |
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310 verbose_usage (void) |
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311 { |
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312 cout << "\n" |
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313 << " Octave, version " << version_string |
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268
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314 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
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315 << " This is free software with ABSOLUTELY NO WARRANTY.\n" |
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316 << "\n" |
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139
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317 << " usage: " << usage_string |
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318 << "\n\n" |
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319 << " d : enter parser debugging mode\n" |
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320 << " f : don't read ~/.octaverc or .octaverc at startup\n" |
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321 << " h|? : print short help message and exit\n" |
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322 << " i : force interactive behavior\n" |
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323 << " q : don't print message at startup\n" |
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139
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324 << " v : print version number and exit\n" |
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325 << " x : echo commands as they are executed\n" |
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326 << "\n" |
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327 << " file : execute commands from named file\n" |
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285
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328 << "\n"; |
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329 |
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330 exit (1); |
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331 } |
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332 |
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333 /* |
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334 * Terse usage messsage. |
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335 */ |
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336 static void |
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337 usage (void) |
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338 { |
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139
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339 cerr << "usage: " << usage_string << "\n"; |
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1
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340 exit (1); |
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341 } |
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342 |
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343 /* |
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344 * Fix up things before exiting. |
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345 */ |
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195
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346 void |
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1
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347 clean_up_and_exit (int retval) |
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348 { |
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349 raw_mode (0); |
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176
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350 |
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1
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351 clean_up_history (); |
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176
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352 |
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1
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353 close_plot_stream (); |
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176
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354 |
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1
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355 close_files (); |
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356 |
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357 if (!quitting_gracefully && (interactive || forced_interactive)) |
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358 cout << "\n"; |
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359 |
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360 if (retval == EOF) |
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361 retval = 0; |
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362 |
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363 exit (retval); |
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195
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364 |
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365 // This is bogus but should prevent g++ from giving a warning saying |
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366 // that this volatile function does return. |
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367 |
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368 panic_impossible (); |
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1
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369 } |
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370 |
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371 static void |
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372 print_version_and_exit (void) |
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373 { |
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374 cout << "octave, version " << version_string << "\n"; |
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375 exit (0); |
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376 } |
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377 |
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378 /* |
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379 * You guessed it. |
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380 */ |
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381 int |
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382 main (int argc, char **argv) |
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383 { |
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384 // Allow for system dependent initialization. See sysdep.cc for more |
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385 // details. |
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386 sysdep_init (); |
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387 |
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195
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388 // This is not really the right place to do this... |
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389 set_Complex_error_handler (octave_Complex_error_handler); |
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390 |
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223
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391 // Or this, probably... |
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392 set_liboctave_error_handler (error); |
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393 |
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1
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394 // Do this first, since some command line arguments may override the |
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395 // defaults. |
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396 initialize_globals (argv[0]); |
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397 |
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139
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398 int optc; |
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399 while ((optc = getopt_long (argc, argv, short_opts, long_opts, 0)) != EOF) |
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1
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400 { |
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139
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401 switch (optc) |
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1
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402 { |
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403 case 'd': |
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404 yydebug++; |
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405 break; |
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406 case 'f': |
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407 read_init_files = 0; |
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408 break; |
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409 case 'h': |
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410 case '?': |
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411 verbose_usage (); |
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412 break; |
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413 case 'i': |
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414 forced_interactive = 1; |
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415 break; |
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416 case 'p': |
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139
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417 if (optarg != (char *) NULL) |
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418 load_path = strsave (optarg); |
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1
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419 break; |
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420 case 'q': |
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421 inhibit_startup_message = 1; |
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422 break; |
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423 case 'x': |
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424 echo_input = 1; |
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425 break; |
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426 case 'v': |
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427 print_version_and_exit (); |
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428 break; |
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186
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429 case INFO_FILE_OPTION: |
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430 if (optarg != (char *) NULL) |
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431 info_file = strsave (optarg); |
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432 break; |
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1
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433 default: |
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434 usage (); |
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435 break; |
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436 } |
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437 } |
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438 |
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439 // Make sure we clean up when we exit. |
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440 atexit (cleanup_tmp_files); |
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441 |
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442 initialize_history (); |
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443 |
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444 initialize_file_io (); |
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445 |
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195
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446 initialize_symbol_tables (); |
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1
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447 |
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448 install_builtins (); |
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449 |
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315
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450 initialize_readline (); |
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451 |
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452 initialize_pager (); |
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453 |
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454 install_signal_handlers (); |
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455 |
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1
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456 if (read_init_files) |
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457 { |
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458 saving_history = 0; |
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459 execute_startup_files (); |
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460 saving_history = 1; |
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461 } |
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462 |
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463 // Avoid counting commands executed from startup files. |
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464 current_command_number = 1; |
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465 |
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466 // If there is an extra argument, see if it names a file to read. |
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467 |
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149
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468 int remaining_args = argc - optind; |
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469 if (remaining_args > 1) |
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470 { |
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471 usage (); |
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472 } |
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473 else if (remaining_args == 1) |
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1
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474 { |
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139
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475 FILE *infile = get_input_from_file (argv[optind]); |
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1
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476 if (infile == (FILE *) NULL) |
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477 clean_up_and_exit (1); |
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478 else |
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287
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479 { |
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480 rl_blink_matching_paren = 0; |
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481 switch_to_buffer (create_buffer (infile)); |
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482 } |
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1
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483 } |
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484 else |
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485 { |
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149
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486 switch_to_buffer (create_buffer (get_input_from_stdin ())); |
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487 |
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1
|
488 // Is input coming from a terminal? If so, we are probably |
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489 // interactive. |
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490 |
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491 interactive = (isatty (fileno (stdin)) && isatty (fileno (stdout))); |
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492 } |
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493 |
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494 // Force input to be echoed if not really interactive, but the user |
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495 // has forced interactive behavior. |
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496 |
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497 if (!interactive && forced_interactive) |
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287
|
498 { |
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499 rl_blink_matching_paren = 0; |
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500 echo_input = 1; |
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501 } |
|
1
|
502 |
|
|
503 if (! (interactive || forced_interactive)) |
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504 using_readline = 0; |
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505 |
|
149
|
506 if (! inhibit_startup_message) |
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507 { |
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508 cout << "Octave, version " << version_string |
|
268
|
509 << ". Copyright (C) 1992, 1993, 1994 John W. Eaton.\n" |
|
149
|
510 << "This is free software with ABSOLUTELY NO WARRANTY.\n" |
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|
511 << "For details, type `warranty'.\n" |
|
287
|
512 << endl; |
|
149
|
513 } |
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|
514 |
|
1
|
515 // Allow the user to interrupt us without exiting. |
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|
516 |
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517 volatile sig_handler *saved_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
518 |
|
|
519 if (setjmp (toplevel) != 0) |
|
|
520 { |
|
|
521 raw_mode (0); |
|
176
|
522 |
|
1
|
523 cout << "\n"; |
|
|
524 } |
|
|
525 |
|
|
526 can_interrupt = 1; |
|
|
527 |
|
|
528 signal (SIGINT, saved_sigint_handler); |
|
|
529 |
|
|
530 // The big loop. |
|
|
531 |
|
|
532 int retval; |
|
|
533 do |
|
|
534 { |
|
287
|
535 curr_sym_tab = top_level_sym_tab; |
|
|
536 |
|
1
|
537 reset_parser (); |
|
287
|
538 |
|
1
|
539 retval = yyparse (); |
|
287
|
540 |
|
1
|
541 if (retval == 0 && global_command != NULL_TREE) |
|
|
542 { |
|
|
543 global_command->eval (1); |
|
|
544 delete global_command; |
|
|
545 current_command_number++; |
|
|
546 } |
|
|
547 } |
|
|
548 while (retval == 0); |
|
|
549 |
|
|
550 clean_up_and_exit (retval); |
|
|
551 } |
|
|
552 |
|
|
553 /* |
|
|
554 ;;; Local Variables: *** |
|
|
555 ;;; mode: C++ *** |
|
|
556 ;;; page-delimiter: "^/\\*" *** |
|
|
557 ;;; End: *** |
|
|
558 */ |
