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1
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1 /* |
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2 |
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1884
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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1315
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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661
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23 /* |
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24 |
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25 The function gethostname was adapted from a similar function from GNU |
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26 Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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27 Software Foundation, Inc. |
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28 |
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29 */ |
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30 |
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240
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31 #ifdef HAVE_CONFIG_H |
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1192
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32 #include <config.h> |
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1
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33 #endif |
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34 |
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1346
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35 #include <cfloat> |
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1343
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36 #include <cstddef> |
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1346
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37 #include <cstdio> |
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1343
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38 #include <cstdlib> |
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39 #include <cstring> |
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40 |
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1728
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41 #include <string> |
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42 |
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1742
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43 #include <iostream.h> |
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44 |
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1350
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45 #ifdef HAVE_UNISTD_H |
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529
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46 #include <sys/types.h> |
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47 #include <unistd.h> |
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48 #endif |
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1
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49 |
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1430
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50 #if defined (HAVE_TERMIOS_H) |
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51 #include <termios.h> |
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52 #elif defined (HAVE_TERMIO_H) |
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53 #include <termio.h> |
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54 #elif defined (HAVE_SGTTY_H) |
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55 #include <sgtty.h> |
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56 #else |
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57 LOSE! LOSE! |
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58 #endif |
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59 |
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1463
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60 #if defined (HAVE_FLOATINGPOINT_H) |
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61 #include <floatingpoint.h> |
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62 #endif |
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63 |
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64 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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65 #include <sys/utsname.h> |
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66 #endif |
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67 |
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68 #include <readline/readline.h> |
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1750
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69 #include <readline/tilde.h> |
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1463
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70 |
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71 extern char *term_clrpag; |
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72 extern "C" void _rl_output_character_function (); |
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73 |
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2317
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74 #include "mach-info.h" |
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1769
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75 #include "oct-math.h" |
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76 |
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1352
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77 #include "defun.h" |
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78 #include "error.h" |
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542
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79 #include "help.h" |
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529
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80 #include "input.h" |
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1742
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81 #include "mappers.h" |
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1755
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82 #include "oct-obj.h" |
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83 #include "pathlen.h" |
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84 #include "pt-const.h" |
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1352
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85 #include "sysdep.h" |
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1755
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86 #include "toplev.h" |
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529
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87 #include "utils.h" |
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88 |
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89 #ifndef STDIN_FILENO |
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90 #define STDIN_FILENO 1 |
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91 #endif |
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444
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92 |
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1
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93 #ifdef NeXT |
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94 extern "C" |
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95 { |
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96 typedef void (*_cplus_fcn_int) (int); |
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97 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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98 } |
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99 |
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100 static void |
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101 malloc_handler (int code) |
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102 { |
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103 if (code == 5) |
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217
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104 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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1
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105 else |
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106 { |
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107 panic ("probably irrecoverable malloc error: code %d", code); |
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108 } |
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109 } |
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110 |
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111 static void |
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112 NeXT_init (void) |
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113 { |
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114 malloc_error (malloc_handler); |
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115 } |
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116 #endif |
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117 |
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505
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118 #if defined (EXCEPTION_IN_MATH) |
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119 extern "C" |
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120 int |
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121 matherr (struct exception *x) |
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122 { |
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1358
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123 // Possibly print our own message someday. Should probably be |
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124 // user-switchable. |
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505
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125 |
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126 switch (x->type) |
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127 { |
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128 case DOMAIN: |
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129 case SING: |
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130 case OVERFLOW: |
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131 case UNDERFLOW: |
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132 case TLOSS: |
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133 case PLOSS: |
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134 default: |
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135 break; |
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136 } |
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137 |
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1358
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138 // But don't print the system message. |
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505
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139 |
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140 return 1; |
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141 } |
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1466
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142 #endif |
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505
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143 |
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1
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144 void |
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145 sysdep_init (void) |
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146 { |
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959
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147 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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148 #if defined (HAVE_FLOATINGPOINT_H) |
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1358
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149 // Disable trapping on common exceptions. |
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401
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150 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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151 #endif |
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959
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152 #endif |
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401
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153 |
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1
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154 #ifdef NeXT |
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155 NeXT_init (); |
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156 #endif |
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444
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157 |
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158 octave_ieee_init (); |
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1
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159 } |
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160 |
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767
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161 // Set terminal in raw mode. From less-177. |
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162 // |
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163 // Change terminal to "raw mode", or restore to "normal" mode. |
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164 // "Raw mode" means |
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165 // 1. An outstanding read will complete on receipt of a single keystroke. |
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166 // 2. Input is not echoed. |
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167 // 3. On output, \n is mapped to \r\n. |
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168 // 4. \t is NOT expanded into spaces. |
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169 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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170 // etc. are NOT disabled. |
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171 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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172 |
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529
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173 void |
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174 raw_mode (int on) |
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175 { |
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176 static int curr_on = 0; |
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177 |
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178 int tty_fd = STDIN_FILENO; |
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179 if (! isatty (tty_fd)) |
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180 { |
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181 if (interactive) |
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182 error ("stdin is not a tty!"); |
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183 return; |
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184 } |
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185 |
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186 if (on == curr_on) |
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187 return; |
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188 |
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189 #if defined (HAVE_TERMIOS_H) |
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190 { |
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191 struct termios s; |
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192 static struct termios save_term; |
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193 |
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194 if (on) |
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195 { |
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1358
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196 // Get terminal modes. |
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529
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197 |
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198 tcgetattr (tty_fd, &s); |
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199 |
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1358
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200 // Save modes and set certain variables dependent on modes. |
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529
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201 |
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202 save_term = s; |
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203 // ospeed = s.c_cflag & CBAUD; |
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204 // erase_char = s.c_cc[VERASE]; |
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205 // kill_char = s.c_cc[VKILL]; |
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206 |
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1358
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207 // Set the modes to the way we want them. |
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529
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208 |
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209 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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210 s.c_oflag |= (OPOST|ONLCR); |
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211 #if defined (OCRNL) |
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212 s.c_oflag &= ~(OCRNL); |
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213 #endif |
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214 #if defined (ONOCR) |
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215 s.c_oflag &= ~(ONOCR); |
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216 #endif |
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217 #if defined (ONLRET) |
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218 s.c_oflag &= ~(ONLRET); |
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219 #endif |
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220 s.c_cc[VMIN] = 1; |
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221 s.c_cc[VTIME] = 0; |
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222 } |
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223 else |
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224 { |
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1358
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225 // Restore saved modes. |
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226 |
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529
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227 s = save_term; |
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228 } |
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229 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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230 } |
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231 #elif defined (HAVE_TERMIO_H) |
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232 { |
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233 struct termio s; |
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234 static struct termio save_term; |
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235 |
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236 if (on) |
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237 { |
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1358
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238 // Get terminal modes. |
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529
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239 |
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240 ioctl (tty_fd, TCGETA, &s); |
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241 |
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1358
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242 // Save modes and set certain variables dependent on modes. |
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529
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243 |
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244 save_term = s; |
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245 // ospeed = s.c_cflag & CBAUD; |
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246 // erase_char = s.c_cc[VERASE]; |
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247 // kill_char = s.c_cc[VKILL]; |
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248 |
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1358
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249 // Set the modes to the way we want them. |
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529
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250 |
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251 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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252 s.c_oflag |= (OPOST|ONLCR); |
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253 #if defined (OCRNL) |
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254 s.c_oflag &= ~(OCRNL); |
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255 #endif |
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256 #if defined (ONOCR) |
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257 s.c_oflag &= ~(ONOCR); |
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258 #endif |
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259 #if defined (ONLRET) |
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260 s.c_oflag &= ~(ONLRET); |
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261 #endif |
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262 s.c_cc[VMIN] = 1; |
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263 s.c_cc[VTIME] = 0; |
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264 } |
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265 else |
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266 { |
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1358
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267 // Restore saved modes. |
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268 |
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529
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269 s = save_term; |
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270 } |
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271 ioctl (tty_fd, TCSETAW, &s); |
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272 } |
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273 #elif defined (HAVE_SGTTY_H) |
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274 { |
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275 struct sgttyb s; |
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276 static struct sgttyb save_term; |
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277 |
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278 if (on) |
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279 { |
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1358
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280 // Get terminal modes. |
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529
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281 |
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282 ioctl (tty_fd, TIOCGETP, &s); |
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283 |
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1358
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284 // Save modes and set certain variables dependent on modes. |
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529
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285 |
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286 save_term = s; |
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287 // ospeed = s.sg_ospeed; |
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288 // erase_char = s.sg_erase; |
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289 // kill_char = s.sg_kill; |
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290 |
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1358
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291 // Set the modes to the way we want them. |
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529
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292 |
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293 s.sg_flags |= CBREAK; |
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294 s.sg_flags &= ~(ECHO); |
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295 } |
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296 else |
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297 { |
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1358
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298 // Restore saved modes. |
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299 |
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529
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300 s = save_term; |
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301 } |
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302 ioctl (tty_fd, TIOCSETN, &s); |
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303 } |
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304 #else |
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305 LOSE! LOSE! |
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306 #endif |
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307 |
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308 curr_on = on; |
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309 } |
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310 |
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767
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311 // Read one character from the terminal. |
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312 |
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529
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313 int |
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314 kbhit (void) |
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315 { |
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316 int c; |
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317 raw_mode (1); |
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318 c = cin.get (); |
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319 raw_mode (0); |
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320 return c; |
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321 } |
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322 |
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1755
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323 string |
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324 octave_getcwd (void) |
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1111
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325 { |
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1755
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326 string retval; |
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327 char buf[MAXPATHLEN]; |
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328 |
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1113
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329 #if defined (__EMX__) |
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1755
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330 char *tmp = _getcwd2 (buf, MAXPATHLEN); |
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1111
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331 #else |
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1755
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332 char *tmp = getcwd (buf, MAXPATHLEN); |
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1111
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333 #endif |
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1755
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334 |
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335 if (tmp) |
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336 retval = tmp; |
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337 |
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338 return retval; |
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1111
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339 } |
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340 |
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341 int |
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1755
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342 octave_chdir (const string& path) |
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1111
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343 { |
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1113
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344 #if defined (__EMX__) |
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1111
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345 int retval = -1; |
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346 |
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1755
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347 if (path.length () == 2 && path[1] == ':') |
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1111
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348 { |
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1755
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349 char *upper_case_dir_name = strupr (path.c_str ()); |
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1111
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350 _chdrive (upper_case_dir_name[0]); |
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351 if (_getdrive () == upper_case_dir_name[0]) |
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352 retval = _chdir2 ("/"); |
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353 } |
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354 else |
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1755
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355 retval = _chdir2 (path.c_str ()); |
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1111
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356 |
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357 return retval; |
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358 #else |
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1755
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359 return chdir (path.c_str ()); |
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1111
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360 #endif |
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361 } |
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362 |
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1957
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363 DEFUN (clc, , , |
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529
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364 "clc (): clear screen") |
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365 { |
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2086
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366 octave_value_list retval; |
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529
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367 |
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368 rl_beg_of_line (); |
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369 rl_kill_line (1); |
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370 |
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371 #if ! defined (_GO32_) |
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372 if (term_clrpag) |
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373 tputs (term_clrpag, 1, _rl_output_character_function); |
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374 else |
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375 crlf (); |
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376 #else |
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377 crlf (); |
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378 #endif |
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379 |
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380 fflush (rl_outstream); |
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381 |
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382 return retval; |
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383 } |
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384 |
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549
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385 DEFALIAS (home, clc); |
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386 |
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1957
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387 DEFUN (getenv, args, , |
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529
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388 "getenv (STRING): get environment variable values") |
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389 { |
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2086
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390 octave_value_list retval; |
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529
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391 |
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392 int nargin = args.length (); |
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393 |
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712
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394 if (nargin == 1) |
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529
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395 { |
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1728
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396 string tstr = args(0).string_value (); |
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397 const char *name = tstr.c_str (); |
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636
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398 |
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399 if (! error_state) |
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400 { |
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401 char *value = getenv (name); |
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402 if (value) |
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403 retval = value; |
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404 else |
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405 retval = ""; |
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406 } |
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529
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407 } |
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408 else |
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409 print_usage ("getenv"); |
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410 |
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411 return retval; |
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412 } |
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413 |
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1957
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414 DEFUN (putenv, args, , |
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1706
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415 "putenv (VAR, VALUE): define environment variable VAR=VALUE") |
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416 { |
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2086
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417 octave_value_list retval; |
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1706
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418 |
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419 int nargin = args.length (); |
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420 |
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421 if (nargin == 2) |
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422 { |
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1755
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423 string var = args(0).string_value (); |
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1706
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424 |
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425 if (! error_state) |
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426 { |
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1755
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427 string val = args(1).string_value (); |
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1706
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428 |
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429 if (! error_state) |
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1755
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430 oct_putenv (var.c_str (), val.c_str ()); |
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1706
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431 else |
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432 error ("putenv: second argument should be a string"); |
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433 } |
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434 else |
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435 error ("putenv: first argument should be a string"); |
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436 } |
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437 else |
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438 print_usage ("putenv"); |
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439 |
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440 return retval; |
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441 } |
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442 |
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1957
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443 DEFUN (kbhit, , , |
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529
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444 "kbhit: get a single character from the terminal") |
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445 { |
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2086
|
446 octave_value_list retval; |
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529
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447 |
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1358
|
448 // XXX FIXME XXX -- add timeout and default value args? |
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529
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449 |
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450 if (interactive) |
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451 { |
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452 int c = kbhit (); |
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453 char *s = new char [2]; |
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454 s[0] = c; |
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455 s[1] = '\0'; |
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456 retval = s; |
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457 } |
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458 |
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459 return retval; |
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460 } |
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461 |
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1957
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462 DEFUN (pause, args, , |
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529
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463 "pause (seconds): suspend program execution") |
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464 { |
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2086
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465 octave_value_list retval; |
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529
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466 |
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467 int nargin = args.length (); |
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468 |
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712
|
469 if (! (nargin == 0 || nargin == 1)) |
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529
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470 { |
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471 print_usage ("pause"); |
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472 return retval; |
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473 } |
|
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474 |
|
1579
|
475 if (nargin == 1) |
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529
|
476 { |
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1579
|
477 double dval = args(0).double_value (); |
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636
|
478 |
|
1579
|
479 if (! error_state) |
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|
480 { |
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|
481 if (xisnan (dval)) |
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|
482 warning ("pause: NaN is an invalid delay"); |
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|
483 else |
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484 { |
|
|
485 int delay = NINT (dval); |
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|
486 if (delay > 0) |
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|
487 sleep (delay); |
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|
488 } |
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529
|
489 } |
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490 } |
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1579
|
491 else |
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492 { |
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|
493 if (kbhit () == EOF) |
|
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494 clean_up_and_exit (0); |
|
|
495 } |
|
529
|
496 |
|
|
497 return retval; |
|
|
498 } |
|
|
499 |
|
862
|
500 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
|
|
501 // point functions really work. |
|
|
502 |
|
1957
|
503 DEFUN (isieee, , , |
|
862
|
504 "isieee (): return 1 if host uses IEEE floating point") |
|
|
505 { |
|
2317
|
506 oct_mach_info::float_format flt_fmt = |
|
|
507 oct_mach_info::native_float_format (); |
|
|
508 |
|
|
509 return (double) (flt_fmt == oct_mach_info::ieee_little_endian |
|
|
510 || flt_fmt == oct_mach_info::ieee_big_endian); |
|
862
|
511 } |
|
|
512 |
|
529
|
513 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
514 int |
|
|
515 gethostname (char *name, int namelen) |
|
|
516 { |
|
|
517 int i; |
|
|
518 struct utsname ut; |
|
|
519 |
|
|
520 --namelen; |
|
|
521 |
|
|
522 uname (&ut); |
|
|
523 i = strlen (ut.nodename) + 1; |
|
|
524 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
525 name[namelen] = '\0'; |
|
|
526 |
|
|
527 return 0; |
|
|
528 } |
|
|
529 #endif |
|
|
530 |
|
1750
|
531 // The check for error state allows us to do this: |
|
|
532 // |
|
|
533 // string foo = oct_tilde_expand (args(0).string_value ()); |
|
|
534 // |
|
|
535 // without having to use a temporary and check error_state before |
|
|
536 // calling oct_tilde_expand. |
|
|
537 |
|
|
538 string |
|
|
539 oct_tilde_expand (const string& name) |
|
|
540 { |
|
|
541 string retval; |
|
|
542 |
|
|
543 if (! error_state) |
|
|
544 { |
|
|
545 char *tmp = tilde_expand (name.c_str ()); |
|
|
546 retval = tmp; |
|
|
547 delete [] tmp; |
|
|
548 } |
|
|
549 |
|
|
550 return retval; |
|
|
551 } |
|
|
552 |
|
1957
|
553 DEFUN (tilde_expand, args, , |
|
1750
|
554 "tilde_expand (STRING): perform tilde expansion on STRING") |
|
|
555 { |
|
2086
|
556 octave_value_list retval; |
|
1750
|
557 |
|
|
558 int nargin = args.length (); |
|
|
559 |
|
|
560 if (nargin == 1) |
|
|
561 retval = oct_tilde_expand (args(0).string_value ()); |
|
|
562 else |
|
|
563 print_usage ("tilde_expand"); |
|
|
564 |
|
|
565 return retval; |
|
|
566 } |
|
|
567 |
|
529
|
568 /* |
|
1
|
569 ;;; Local Variables: *** |
|
|
570 ;;; mode: C++ *** |
|
|
571 ;;; End: *** |
|
|
572 */ |
