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1
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1 // sysdep.cc -*- C++ -*- |
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2 /* |
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3 |
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1009
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4 Copyright (C) 1993, 1994, 1995 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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661
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24 /* |
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25 |
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26 The function gethostname was adapted from a similar function from GNU |
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27 Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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28 Software Foundation, Inc. |
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29 |
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30 */ |
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31 |
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240
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32 #ifdef HAVE_CONFIG_H |
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1192
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33 #include <config.h> |
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1
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34 #endif |
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35 |
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529
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36 #include <sys/types.h> |
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37 #ifdef HAVE_UNISTD_H |
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38 #include <unistd.h> |
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39 #endif |
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470
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40 #include <math.h> |
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844
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41 #include <float.h> |
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529
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42 #include <stddef.h> |
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1
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43 #include <stdlib.h> |
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529
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44 #include <stdio.h> |
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1
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45 |
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529
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46 #include "tree-const.h" |
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47 #include "octave.h" |
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542
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48 #include "help.h" |
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529
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49 #include "input.h" |
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50 #include "utils.h" |
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51 #include "oct-obj.h" |
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1
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52 #include "error.h" |
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444
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53 #include "sysdep.h" |
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529
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54 #include "defun.h" |
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55 |
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56 extern "C" |
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57 { |
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58 #include <readline/readline.h> |
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59 |
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60 extern char *term_clrpag; |
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61 extern void _rl_output_character_function (); |
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62 |
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63 #if defined (HAVE_TERMIOS_H) |
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64 #include <termios.h> |
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65 #elif defined (HAVE_TERMIO_H) |
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66 #include <termio.h> |
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67 #elif defined (HAVE_SGTTY_H) |
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68 #include <sgtty.h> |
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69 #else |
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70 LOSE! LOSE! |
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71 #endif |
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72 } |
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73 |
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74 #ifndef STDIN_FILENO |
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75 #define STDIN_FILENO 1 |
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76 #endif |
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444
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77 |
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78 // Octave's idea of infinity. |
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79 double octave_Inf; |
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80 |
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81 // Octave's idea of not a number. |
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82 double octave_NaN; |
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1
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83 |
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959
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84 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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85 #include <floatingpoint.h> |
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86 #endif |
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87 |
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1
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88 #ifdef NeXT |
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89 extern "C" |
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90 { |
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91 typedef void (*_cplus_fcn_int) (int); |
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92 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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93 } |
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94 |
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95 static void |
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96 malloc_handler (int code) |
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97 { |
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98 if (code == 5) |
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217
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99 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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100 else |
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101 { |
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102 panic ("probably irrecoverable malloc error: code %d", code); |
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103 } |
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104 } |
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105 |
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106 static void |
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107 NeXT_init (void) |
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108 { |
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109 malloc_error (malloc_handler); |
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110 } |
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111 #endif |
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112 |
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444
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113 static void |
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114 octave_ieee_init (void) |
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115 { |
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116 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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117 |
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118 // Some version of gcc on some old version of Linux used to crash when |
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119 // trying to make Inf and NaN. |
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120 |
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121 #if defined (HAVE_INFINITY) |
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470
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122 octave_Inf = (double) infinity (); |
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967
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123 #elif defined (linux) |
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444
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124 octave_Inf = HUGE_VAL; |
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967
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125 #elif defined (__alpha__) |
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529
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126 extern unsigned int DINFINITY[2]; |
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127 octave_Inf = (*((double *) (DINFINITY))); |
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128 #else |
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444
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129 double tmp = 1e+10; |
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130 octave_Inf = tmp; |
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131 for (;;) |
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132 { |
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133 octave_Inf *= 1e+10; |
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134 if (octave_Inf == tmp) |
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135 break; |
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136 tmp = octave_Inf; |
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137 } |
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138 #endif |
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529
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139 |
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444
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140 #if defined (HAVE_QUIET_NAN) |
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470
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141 octave_NaN = (double) quiet_nan (); |
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967
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142 #elif defined (linux) |
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444
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143 octave_NaN = NAN; |
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967
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144 #elif defined (__alpha__) |
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529
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145 extern unsigned int DQNAN[2]; |
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146 octave_NaN = (*((double *) (DQNAN))); |
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147 #else |
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444
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148 octave_NaN = octave_Inf / octave_Inf; |
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149 #endif |
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150 |
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151 #else |
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152 |
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153 // This is sort of cheesy, but what can we do, other than blowing it |
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154 // off completely, or writing an entire IEEE emulation package? |
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155 |
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156 octave_Inf = DBL_MAX; |
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157 octave_NaN = DBL_MAX; |
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158 |
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159 #endif |
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160 } |
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161 |
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505
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162 #if defined (EXCEPTION_IN_MATH) |
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163 extern "C" |
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164 { |
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165 int |
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166 matherr (struct exception *x) |
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167 { |
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168 // Possibly print our own message someday. Should probably be |
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169 // user-switchable. |
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170 |
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171 switch (x->type) |
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172 { |
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173 case DOMAIN: |
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174 case SING: |
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175 case OVERFLOW: |
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176 case UNDERFLOW: |
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177 case TLOSS: |
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178 case PLOSS: |
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179 default: |
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180 break; |
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181 } |
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182 |
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183 // But don't print the system message. |
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184 |
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185 return 1; |
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186 } |
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187 } |
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188 #endif |
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189 |
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1
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190 void |
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191 sysdep_init (void) |
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192 { |
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959
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193 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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194 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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195 // Disable trapping on common exceptions. |
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196 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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197 #endif |
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959
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198 #endif |
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401
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199 |
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1
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200 #ifdef NeXT |
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201 NeXT_init (); |
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202 #endif |
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444
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203 |
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204 octave_ieee_init (); |
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1
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205 } |
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206 |
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767
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207 // Set terminal in raw mode. From less-177. |
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208 // |
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209 // Change terminal to "raw mode", or restore to "normal" mode. |
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210 // "Raw mode" means |
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211 // 1. An outstanding read will complete on receipt of a single keystroke. |
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212 // 2. Input is not echoed. |
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213 // 3. On output, \n is mapped to \r\n. |
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214 // 4. \t is NOT expanded into spaces. |
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215 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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216 // etc. are NOT disabled. |
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217 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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218 |
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529
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219 void |
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220 raw_mode (int on) |
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221 { |
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222 static int curr_on = 0; |
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223 |
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224 int tty_fd = STDIN_FILENO; |
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225 if (! isatty (tty_fd)) |
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226 { |
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227 if (interactive) |
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228 error ("stdin is not a tty!"); |
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229 return; |
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230 } |
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231 |
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232 if (on == curr_on) |
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233 return; |
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234 |
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235 #if defined (HAVE_TERMIOS_H) |
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236 { |
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237 struct termios s; |
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238 static struct termios save_term; |
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239 |
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240 if (on) |
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241 { |
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242 // Get terminal modes. |
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243 |
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244 tcgetattr (tty_fd, &s); |
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245 |
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246 // Save modes and set certain variables dependent on modes. |
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247 |
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248 save_term = s; |
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249 // ospeed = s.c_cflag & CBAUD; |
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250 // erase_char = s.c_cc[VERASE]; |
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251 // kill_char = s.c_cc[VKILL]; |
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252 |
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253 // Set the modes to the way we want them. |
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254 |
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255 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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256 s.c_oflag |= (OPOST|ONLCR); |
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257 #if defined (OCRNL) |
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258 s.c_oflag &= ~(OCRNL); |
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259 #endif |
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260 #if defined (ONOCR) |
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261 s.c_oflag &= ~(ONOCR); |
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262 #endif |
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263 #if defined (ONLRET) |
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264 s.c_oflag &= ~(ONLRET); |
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265 #endif |
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266 s.c_cc[VMIN] = 1; |
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267 s.c_cc[VTIME] = 0; |
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268 } |
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269 else |
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270 { |
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271 // Restore saved modes. |
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272 s = save_term; |
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273 } |
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274 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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275 } |
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276 #elif defined (HAVE_TERMIO_H) |
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277 { |
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278 struct termio s; |
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279 static struct termio save_term; |
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280 |
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281 if (on) |
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282 { |
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283 // Get terminal modes. |
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284 |
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285 ioctl (tty_fd, TCGETA, &s); |
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286 |
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287 // Save modes and set certain variables dependent on modes. |
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288 |
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289 save_term = s; |
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290 // ospeed = s.c_cflag & CBAUD; |
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291 // erase_char = s.c_cc[VERASE]; |
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292 // kill_char = s.c_cc[VKILL]; |
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293 |
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294 // Set the modes to the way we want them. |
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295 |
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296 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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297 s.c_oflag |= (OPOST|ONLCR); |
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298 #if defined (OCRNL) |
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299 s.c_oflag &= ~(OCRNL); |
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300 #endif |
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301 #if defined (ONOCR) |
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302 s.c_oflag &= ~(ONOCR); |
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303 #endif |
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304 #if defined (ONLRET) |
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305 s.c_oflag &= ~(ONLRET); |
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306 #endif |
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307 s.c_cc[VMIN] = 1; |
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308 s.c_cc[VTIME] = 0; |
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309 } |
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310 else |
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311 { |
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312 // Restore saved modes. |
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313 s = save_term; |
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314 } |
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315 ioctl (tty_fd, TCSETAW, &s); |
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316 } |
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317 #elif defined (HAVE_SGTTY_H) |
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318 { |
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319 struct sgttyb s; |
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320 static struct sgttyb save_term; |
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321 |
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322 if (on) |
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323 { |
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324 // Get terminal modes. |
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325 |
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326 ioctl (tty_fd, TIOCGETP, &s); |
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327 |
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328 // Save modes and set certain variables dependent on modes. |
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329 |
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330 save_term = s; |
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331 // ospeed = s.sg_ospeed; |
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332 // erase_char = s.sg_erase; |
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333 // kill_char = s.sg_kill; |
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334 |
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335 // Set the modes to the way we want them. |
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336 |
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337 s.sg_flags |= CBREAK; |
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338 s.sg_flags &= ~(ECHO); |
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339 } |
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340 else |
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341 { |
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342 // Restore saved modes. |
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343 s = save_term; |
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344 } |
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345 ioctl (tty_fd, TIOCSETN, &s); |
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346 } |
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347 #else |
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348 LOSE! LOSE! |
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349 #endif |
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350 |
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351 curr_on = on; |
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352 } |
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353 |
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767
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354 // Read one character from the terminal. |
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355 |
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529
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356 int |
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357 kbhit (void) |
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358 { |
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359 int c; |
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360 raw_mode (1); |
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361 c = cin.get (); |
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362 raw_mode (0); |
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363 return c; |
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364 } |
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365 |
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1111
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366 char * |
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1126
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367 octave_getcwd (char *buf, int len) |
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1111
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368 { |
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1113
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369 #if defined (__EMX__) |
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1111
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370 return _getcwd2 (buf, len); |
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371 #else |
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372 return getcwd (buf, len); |
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373 #endif |
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374 } |
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375 |
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376 int |
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1128
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377 octave_chdir (const char *path) |
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1111
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378 { |
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1113
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379 #if defined (__EMX__) |
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1111
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380 int retval = -1; |
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381 |
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382 if (strlen (path) == 2 && path[1] == ':') |
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383 { |
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384 char *upper_case_dir_name = strupr (path); |
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385 _chdrive (upper_case_dir_name[0]); |
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386 if (_getdrive () == upper_case_dir_name[0]) |
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387 retval = _chdir2 ("/"); |
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388 } |
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389 else |
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390 retval = _chdir2 (path); |
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391 |
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392 return retval; |
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393 #else |
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394 return chdir (path); |
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395 #endif |
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396 } |
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397 |
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712
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398 DEFUN ("clc", Fclc, Sclc, 0, 0, |
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529
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399 "clc (): clear screen") |
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400 { |
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401 Octave_object retval; |
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402 |
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403 rl_beg_of_line (); |
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404 rl_kill_line (1); |
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405 |
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406 #if ! defined (_GO32_) |
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407 if (term_clrpag) |
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408 tputs (term_clrpag, 1, _rl_output_character_function); |
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409 else |
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410 crlf (); |
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411 #else |
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412 crlf (); |
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413 #endif |
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414 |
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415 fflush (rl_outstream); |
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416 |
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417 return retval; |
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418 } |
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419 |
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549
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420 DEFALIAS (home, clc); |
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421 |
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712
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422 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
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529
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423 "getenv (STRING): get environment variable values") |
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424 { |
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425 Octave_object retval; |
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426 |
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427 int nargin = args.length (); |
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428 |
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712
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429 if (nargin == 1) |
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529
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430 { |
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712
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431 char *name = args(0).string_value (); |
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636
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432 |
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433 if (! error_state) |
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434 { |
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435 char *value = getenv (name); |
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436 if (value) |
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437 retval = value; |
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438 else |
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439 retval = ""; |
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440 } |
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529
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441 } |
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442 else |
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443 print_usage ("getenv"); |
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444 |
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445 return retval; |
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446 } |
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447 |
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712
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448 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
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529
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449 "kbhit: get a single character from the terminal") |
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450 { |
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451 Octave_object retval; |
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452 |
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453 // XXX FIXME XXX -- add timeout and default value args? |
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454 |
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455 if (interactive) |
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456 { |
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457 int c = kbhit (); |
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458 char *s = new char [2]; |
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459 s[0] = c; |
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460 s[1] = '\0'; |
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461 retval = s; |
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462 } |
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463 |
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464 return retval; |
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465 } |
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466 |
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467 DEFUN ("pause", Fpause, Spause, 1, 1, |
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468 "pause (seconds): suspend program execution") |
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469 { |
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470 Octave_object retval; |
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471 |
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472 int nargin = args.length (); |
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473 |
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712
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474 if (! (nargin == 0 || nargin == 1)) |
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529
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475 { |
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476 print_usage ("pause"); |
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477 return retval; |
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478 } |
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479 |
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480 if (interactive) |
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481 { |
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482 switch (nargin) |
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483 { |
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712
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484 case 1: |
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529
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485 { |
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712
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486 double dval = args(0).double_value (); |
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636
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487 |
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488 if (! error_state) |
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529
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489 { |
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1086
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490 if (xisnan (dval)) |
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491 warning ("pause: NaN is an invalid delay"); |
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492 else |
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493 { |
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494 int delay = NINT (dval); |
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495 if (delay > 0) |
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496 sleep (delay); |
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497 } |
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529
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498 } |
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499 } |
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636
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500 break; |
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501 |
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529
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502 default: |
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503 if (kbhit () == EOF) |
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504 clean_up_and_exit (0); |
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505 break; |
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506 } |
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507 } |
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508 |
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509 return retval; |
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510 } |
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511 |
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862
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512 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
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|
513 // point functions really work. |
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514 |
|
|
515 DEFUN ("isieee", Fisieee, Sisieee, 1, 1, |
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|
516 "isieee (): return 1 if host uses IEEE floating point") |
|
|
517 { |
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|
518 Octave_object retval; |
|
|
519 |
|
|
520 #if defined (IEEE_BIG_ENDIAN) || defined (IEEE_LITTLE_ENDIAN) |
|
|
521 retval = 1.0; |
|
|
522 #else |
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|
523 retval = 0.0; |
|
|
524 #endif |
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|
525 |
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|
526 return retval; |
|
|
527 } |
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|
528 |
|
529
|
529 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
530 extern "C" |
|
|
531 { |
|
|
532 #include <sys/utsname.h> |
|
|
533 int |
|
|
534 gethostname (char *name, int namelen) |
|
|
535 { |
|
|
536 int i; |
|
|
537 struct utsname ut; |
|
|
538 |
|
|
539 --namelen; |
|
|
540 |
|
|
541 uname (&ut); |
|
|
542 i = strlen (ut.nodename) + 1; |
|
|
543 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
544 name[namelen] = '\0'; |
|
|
545 |
|
|
546 return 0; |
|
|
547 } |
|
|
548 } |
|
|
549 #endif |
|
|
550 |
|
|
551 /* |
|
1
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552 ;;; Local Variables: *** |
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|
553 ;;; mode: C++ *** |
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|
554 ;;; page-delimiter: "^/\\*" *** |
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|
555 ;;; End: *** |
|
|
556 */ |
