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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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1315
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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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34 #endif |
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35 |
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1346
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36 #include <cfloat> |
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1343
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37 #include <cmath> |
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38 #include <cstddef> |
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1346
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39 #include <cstdio> |
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1343
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40 #include <cstdlib> |
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41 #include <cstring> |
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42 |
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1350
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43 #ifdef HAVE_UNISTD_H |
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529
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44 #include <sys/types.h> |
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45 #include <unistd.h> |
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46 #endif |
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47 |
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1352
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48 #include "defun.h" |
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49 #include "error.h" |
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50 #include "f77-uscore.h" |
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542
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51 #include "help.h" |
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529
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52 #include "input.h" |
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1352
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53 #include "oct-obj.h" |
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54 #include "octave.h" |
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55 #include "sysdep.h" |
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56 #include "tree-const.h" |
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529
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57 #include "utils.h" |
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58 |
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59 extern "C" |
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60 { |
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61 #include <readline/readline.h> |
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62 |
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63 extern char *term_clrpag; |
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64 extern void _rl_output_character_function (); |
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65 |
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66 #if defined (HAVE_TERMIOS_H) |
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67 #include <termios.h> |
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68 #elif defined (HAVE_TERMIO_H) |
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69 #include <termio.h> |
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70 #elif defined (HAVE_SGTTY_H) |
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71 #include <sgtty.h> |
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72 #else |
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73 LOSE! LOSE! |
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74 #endif |
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1226
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75 |
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1255
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76 extern double F77_FCN (d1mach, D1MACH) (const int&); |
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529
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77 } |
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78 |
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79 #ifndef STDIN_FILENO |
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80 #define STDIN_FILENO 1 |
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81 #endif |
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444
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82 |
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83 // Octave's idea of infinity. |
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84 double octave_Inf; |
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85 |
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86 // Octave's idea of not a number. |
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87 double octave_NaN; |
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88 |
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1226
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89 // The floating point format on this system. |
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90 floating_point_format native_float_format = OCTAVE_UNKNOWN_FLT_FMT; |
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91 |
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1415
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92 // Nonzero if the machine we are running on is big-endian. |
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93 int octave_words_big_endian; |
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94 |
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959
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95 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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96 #include <floatingpoint.h> |
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97 #endif |
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98 |
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99 #ifdef NeXT |
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100 extern "C" |
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101 { |
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102 typedef void (*_cplus_fcn_int) (int); |
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103 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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104 } |
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105 |
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106 static void |
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107 malloc_handler (int code) |
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108 { |
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109 if (code == 5) |
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217
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110 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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111 else |
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112 { |
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113 panic ("probably irrecoverable malloc error: code %d", code); |
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114 } |
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115 } |
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116 |
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117 static void |
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118 NeXT_init (void) |
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119 { |
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120 malloc_error (malloc_handler); |
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121 } |
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122 #endif |
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123 |
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1226
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124 union equiv |
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125 { |
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126 double d; |
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127 int i[2]; |
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128 }; |
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129 |
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130 struct float_params |
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131 { |
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132 floating_point_format fp_fmt; |
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133 equiv fp_par[4]; |
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134 }; |
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135 |
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136 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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137 do \ |
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138 { \ |
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139 fp.fp_fmt = (fmt); \ |
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140 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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141 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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142 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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143 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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144 } \ |
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145 while (0) |
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146 |
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147 static int |
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148 equiv_compare (const equiv *std, const equiv *v, int len) |
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149 { |
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150 int i; |
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151 for (i = 0; i < len; i++) |
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152 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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153 return 0; |
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154 return 1; |
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155 } |
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156 |
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444
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157 static void |
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158 octave_ieee_init (void) |
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159 { |
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160 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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161 |
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162 // Some version of gcc on some old version of Linux used to crash when |
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163 // trying to make Inf and NaN. |
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164 |
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165 #if defined (HAVE_INFINITY) |
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470
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166 octave_Inf = (double) infinity (); |
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967
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167 #elif defined (linux) |
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444
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168 octave_Inf = HUGE_VAL; |
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967
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169 #elif defined (__alpha__) |
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529
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170 extern unsigned int DINFINITY[2]; |
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171 octave_Inf = (*((double *) (DINFINITY))); |
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172 #else |
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444
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173 double tmp = 1e+10; |
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174 octave_Inf = tmp; |
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175 for (;;) |
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176 { |
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177 octave_Inf *= 1e+10; |
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178 if (octave_Inf == tmp) |
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179 break; |
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180 tmp = octave_Inf; |
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181 } |
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182 #endif |
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529
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183 |
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1384
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184 #endif |
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185 |
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186 #if defined (HAVE_ISNAN) |
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187 |
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444
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188 #if defined (HAVE_QUIET_NAN) |
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470
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189 octave_NaN = (double) quiet_nan (); |
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967
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190 #elif defined (linux) |
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444
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191 octave_NaN = NAN; |
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967
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192 #elif defined (__alpha__) |
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529
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193 extern unsigned int DQNAN[2]; |
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194 octave_NaN = (*((double *) (DQNAN))); |
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195 #else |
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444
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196 octave_NaN = octave_Inf / octave_Inf; |
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197 #endif |
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198 |
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199 #endif |
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1226
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200 |
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201 float_params fp[5]; |
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202 |
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203 INIT_FLT_PAR (fp[0], OCTAVE_IEEE_BIG, |
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204 1048576, 0, |
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205 2146435071, -1, |
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206 1017118720, 0, |
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207 1018167296, 0); |
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208 |
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209 INIT_FLT_PAR (fp[1], OCTAVE_IEEE_LITTLE, |
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210 0, 1048576, |
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211 -1, 2146435071, |
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212 0, 1017118720, |
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213 0, 1018167296); |
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214 |
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215 INIT_FLT_PAR (fp[2], OCTAVE_VAX_D, |
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216 128, 0, |
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217 -32769, -1, |
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218 9344, 0, |
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219 9344, 0); |
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220 |
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221 INIT_FLT_PAR (fp[3], OCTAVE_VAX_G, |
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222 16, 0, |
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223 -32769, -1, |
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224 15552, 0, |
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225 15552, 0); |
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226 |
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227 INIT_FLT_PAR (fp[4], OCTAVE_UNKNOWN_FLT_FMT, |
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228 0, 0, |
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229 0, 0, |
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230 0, 0, |
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231 0, 0); |
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232 |
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233 equiv mach_fp_par[4]; |
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234 |
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1255
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235 mach_fp_par[0].d = F77_FCN (d1mach, D1MACH) (1); |
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236 mach_fp_par[1].d = F77_FCN (d1mach, D1MACH) (2); |
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237 mach_fp_par[2].d = F77_FCN (d1mach, D1MACH) (3); |
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238 mach_fp_par[3].d = F77_FCN (d1mach, D1MACH) (4); |
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239 |
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240 int i = 0; |
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241 do |
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242 { |
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243 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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244 { |
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245 native_float_format = fp[i].fp_fmt; |
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246 break; |
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247 } |
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248 } |
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249 while (fp[++i].fp_fmt != OCTAVE_UNKNOWN_FLT_FMT); |
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250 |
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251 if (native_float_format == OCTAVE_UNKNOWN_FLT_FMT) |
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252 panic ("unrecognized floating point format!"); |
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444
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253 } |
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254 |
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1415
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255 static void |
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256 ten_little_endians (void) |
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257 { |
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258 // Are we little or big endian? From Harbison & Steele. |
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259 |
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260 union |
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261 { |
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262 long l; |
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263 char c[sizeof (long)]; |
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264 } u; |
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265 |
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266 u.l = 1; |
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267 |
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268 octave_words_big_endian = (u.c[sizeof (long) - 1] == 1); |
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269 } |
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270 |
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505
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271 #if defined (EXCEPTION_IN_MATH) |
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272 extern "C" |
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273 { |
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274 int |
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275 matherr (struct exception *x) |
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276 { |
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1358
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277 // Possibly print our own message someday. Should probably be |
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278 // user-switchable. |
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505
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279 |
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280 switch (x->type) |
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281 { |
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282 case DOMAIN: |
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283 case SING: |
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284 case OVERFLOW: |
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285 case UNDERFLOW: |
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286 case TLOSS: |
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287 case PLOSS: |
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288 default: |
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289 break; |
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290 } |
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291 |
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1358
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292 // But don't print the system message. |
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505
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293 |
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294 return 1; |
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295 } |
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296 } |
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297 #endif |
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298 |
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299 void |
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300 sysdep_init (void) |
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301 { |
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959
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302 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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303 #if defined (HAVE_FLOATINGPOINT_H) |
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1358
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304 // Disable trapping on common exceptions. |
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401
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305 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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306 #endif |
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959
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307 #endif |
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401
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308 |
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1
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309 #ifdef NeXT |
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310 NeXT_init (); |
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311 #endif |
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444
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312 |
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313 octave_ieee_init (); |
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314 |
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315 ten_little_endians (); |
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316 } |
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317 |
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767
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318 // Set terminal in raw mode. From less-177. |
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319 // |
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320 // Change terminal to "raw mode", or restore to "normal" mode. |
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321 // "Raw mode" means |
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322 // 1. An outstanding read will complete on receipt of a single keystroke. |
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323 // 2. Input is not echoed. |
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324 // 3. On output, \n is mapped to \r\n. |
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325 // 4. \t is NOT expanded into spaces. |
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326 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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327 // etc. are NOT disabled. |
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328 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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329 |
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529
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330 void |
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331 raw_mode (int on) |
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332 { |
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333 static int curr_on = 0; |
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334 |
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335 int tty_fd = STDIN_FILENO; |
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336 if (! isatty (tty_fd)) |
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337 { |
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338 if (interactive) |
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339 error ("stdin is not a tty!"); |
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340 return; |
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341 } |
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342 |
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343 if (on == curr_on) |
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344 return; |
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345 |
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346 #if defined (HAVE_TERMIOS_H) |
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347 { |
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348 struct termios s; |
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349 static struct termios save_term; |
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350 |
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351 if (on) |
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352 { |
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1358
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353 // Get terminal modes. |
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529
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354 |
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355 tcgetattr (tty_fd, &s); |
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356 |
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1358
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357 // Save modes and set certain variables dependent on modes. |
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529
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358 |
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359 save_term = s; |
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360 // ospeed = s.c_cflag & CBAUD; |
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361 // erase_char = s.c_cc[VERASE]; |
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362 // kill_char = s.c_cc[VKILL]; |
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363 |
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1358
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364 // Set the modes to the way we want them. |
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529
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365 |
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366 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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367 s.c_oflag |= (OPOST|ONLCR); |
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368 #if defined (OCRNL) |
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369 s.c_oflag &= ~(OCRNL); |
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370 #endif |
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371 #if defined (ONOCR) |
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372 s.c_oflag &= ~(ONOCR); |
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373 #endif |
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374 #if defined (ONLRET) |
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375 s.c_oflag &= ~(ONLRET); |
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376 #endif |
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377 s.c_cc[VMIN] = 1; |
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378 s.c_cc[VTIME] = 0; |
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379 } |
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380 else |
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381 { |
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1358
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382 // Restore saved modes. |
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383 |
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529
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384 s = save_term; |
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385 } |
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386 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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387 } |
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388 #elif defined (HAVE_TERMIO_H) |
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389 { |
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390 struct termio s; |
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391 static struct termio save_term; |
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392 |
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393 if (on) |
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394 { |
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1358
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395 // Get terminal modes. |
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529
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396 |
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397 ioctl (tty_fd, TCGETA, &s); |
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398 |
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1358
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399 // Save modes and set certain variables dependent on modes. |
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529
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400 |
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401 save_term = s; |
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402 // ospeed = s.c_cflag & CBAUD; |
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403 // erase_char = s.c_cc[VERASE]; |
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404 // kill_char = s.c_cc[VKILL]; |
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405 |
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1358
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406 // Set the modes to the way we want them. |
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529
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407 |
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408 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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409 s.c_oflag |= (OPOST|ONLCR); |
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410 #if defined (OCRNL) |
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411 s.c_oflag &= ~(OCRNL); |
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412 #endif |
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413 #if defined (ONOCR) |
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414 s.c_oflag &= ~(ONOCR); |
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415 #endif |
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416 #if defined (ONLRET) |
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417 s.c_oflag &= ~(ONLRET); |
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418 #endif |
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419 s.c_cc[VMIN] = 1; |
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420 s.c_cc[VTIME] = 0; |
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421 } |
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422 else |
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423 { |
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1358
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424 // Restore saved modes. |
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425 |
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529
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426 s = save_term; |
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427 } |
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428 ioctl (tty_fd, TCSETAW, &s); |
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429 } |
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430 #elif defined (HAVE_SGTTY_H) |
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431 { |
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432 struct sgttyb s; |
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433 static struct sgttyb save_term; |
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434 |
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435 if (on) |
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436 { |
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1358
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437 // Get terminal modes. |
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529
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438 |
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439 ioctl (tty_fd, TIOCGETP, &s); |
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440 |
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1358
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441 // Save modes and set certain variables dependent on modes. |
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529
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442 |
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443 save_term = s; |
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444 // ospeed = s.sg_ospeed; |
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445 // erase_char = s.sg_erase; |
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446 // kill_char = s.sg_kill; |
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447 |
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1358
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448 // Set the modes to the way we want them. |
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529
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449 |
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450 s.sg_flags |= CBREAK; |
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451 s.sg_flags &= ~(ECHO); |
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452 } |
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453 else |
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454 { |
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1358
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455 // Restore saved modes. |
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456 |
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529
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457 s = save_term; |
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458 } |
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459 ioctl (tty_fd, TIOCSETN, &s); |
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460 } |
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461 #else |
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462 LOSE! LOSE! |
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463 #endif |
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464 |
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465 curr_on = on; |
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466 } |
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467 |
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767
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468 // Read one character from the terminal. |
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469 |
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529
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470 int |
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471 kbhit (void) |
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472 { |
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473 int c; |
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474 raw_mode (1); |
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475 c = cin.get (); |
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|
476 raw_mode (0); |
|
|
477 return c; |
|
|
478 } |
|
|
479 |
|
1111
|
480 char * |
|
1126
|
481 octave_getcwd (char *buf, int len) |
|
1111
|
482 { |
|
1113
|
483 #if defined (__EMX__) |
|
1111
|
484 return _getcwd2 (buf, len); |
|
|
485 #else |
|
|
486 return getcwd (buf, len); |
|
|
487 #endif |
|
|
488 } |
|
|
489 |
|
|
490 int |
|
1128
|
491 octave_chdir (const char *path) |
|
1111
|
492 { |
|
1113
|
493 #if defined (__EMX__) |
|
1111
|
494 int retval = -1; |
|
|
495 |
|
|
496 if (strlen (path) == 2 && path[1] == ':') |
|
|
497 { |
|
|
498 char *upper_case_dir_name = strupr (path); |
|
|
499 _chdrive (upper_case_dir_name[0]); |
|
|
500 if (_getdrive () == upper_case_dir_name[0]) |
|
|
501 retval = _chdir2 ("/"); |
|
|
502 } |
|
|
503 else |
|
|
504 retval = _chdir2 (path); |
|
|
505 |
|
|
506 return retval; |
|
|
507 #else |
|
|
508 return chdir (path); |
|
|
509 #endif |
|
|
510 } |
|
|
511 |
|
712
|
512 DEFUN ("clc", Fclc, Sclc, 0, 0, |
|
529
|
513 "clc (): clear screen") |
|
|
514 { |
|
|
515 Octave_object retval; |
|
|
516 |
|
|
517 rl_beg_of_line (); |
|
|
518 rl_kill_line (1); |
|
|
519 |
|
|
520 #if ! defined (_GO32_) |
|
|
521 if (term_clrpag) |
|
|
522 tputs (term_clrpag, 1, _rl_output_character_function); |
|
|
523 else |
|
|
524 crlf (); |
|
|
525 #else |
|
|
526 crlf (); |
|
|
527 #endif |
|
|
528 |
|
|
529 fflush (rl_outstream); |
|
|
530 |
|
|
531 return retval; |
|
|
532 } |
|
|
533 |
|
549
|
534 DEFALIAS (home, clc); |
|
|
535 |
|
712
|
536 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
|
529
|
537 "getenv (STRING): get environment variable values") |
|
|
538 { |
|
|
539 Octave_object retval; |
|
|
540 |
|
|
541 int nargin = args.length (); |
|
|
542 |
|
712
|
543 if (nargin == 1) |
|
529
|
544 { |
|
1363
|
545 const char *name = args(0).string_value (); |
|
636
|
546 |
|
|
547 if (! error_state) |
|
|
548 { |
|
|
549 char *value = getenv (name); |
|
|
550 if (value) |
|
|
551 retval = value; |
|
|
552 else |
|
|
553 retval = ""; |
|
|
554 } |
|
529
|
555 } |
|
|
556 else |
|
|
557 print_usage ("getenv"); |
|
|
558 |
|
|
559 return retval; |
|
|
560 } |
|
|
561 |
|
712
|
562 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
|
529
|
563 "kbhit: get a single character from the terminal") |
|
|
564 { |
|
|
565 Octave_object retval; |
|
|
566 |
|
1358
|
567 // XXX FIXME XXX -- add timeout and default value args? |
|
529
|
568 |
|
|
569 if (interactive) |
|
|
570 { |
|
|
571 int c = kbhit (); |
|
|
572 char *s = new char [2]; |
|
|
573 s[0] = c; |
|
|
574 s[1] = '\0'; |
|
|
575 retval = s; |
|
|
576 } |
|
|
577 |
|
|
578 return retval; |
|
|
579 } |
|
|
580 |
|
|
581 DEFUN ("pause", Fpause, Spause, 1, 1, |
|
|
582 "pause (seconds): suspend program execution") |
|
|
583 { |
|
|
584 Octave_object retval; |
|
|
585 |
|
|
586 int nargin = args.length (); |
|
|
587 |
|
712
|
588 if (! (nargin == 0 || nargin == 1)) |
|
529
|
589 { |
|
|
590 print_usage ("pause"); |
|
|
591 return retval; |
|
|
592 } |
|
|
593 |
|
|
594 if (interactive) |
|
|
595 { |
|
|
596 switch (nargin) |
|
|
597 { |
|
712
|
598 case 1: |
|
529
|
599 { |
|
712
|
600 double dval = args(0).double_value (); |
|
636
|
601 |
|
|
602 if (! error_state) |
|
529
|
603 { |
|
1086
|
604 if (xisnan (dval)) |
|
|
605 warning ("pause: NaN is an invalid delay"); |
|
|
606 else |
|
|
607 { |
|
|
608 int delay = NINT (dval); |
|
|
609 if (delay > 0) |
|
|
610 sleep (delay); |
|
|
611 } |
|
529
|
612 } |
|
|
613 } |
|
636
|
614 break; |
|
|
615 |
|
529
|
616 default: |
|
|
617 if (kbhit () == EOF) |
|
|
618 clean_up_and_exit (0); |
|
|
619 break; |
|
|
620 } |
|
|
621 } |
|
|
622 |
|
|
623 return retval; |
|
|
624 } |
|
|
625 |
|
862
|
626 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
|
|
627 // point functions really work. |
|
|
628 |
|
|
629 DEFUN ("isieee", Fisieee, Sisieee, 1, 1, |
|
|
630 "isieee (): return 1 if host uses IEEE floating point") |
|
|
631 { |
|
1226
|
632 return (double) (native_float_format == OCTAVE_IEEE_LITTLE |
|
|
633 || native_float_format == OCTAVE_IEEE_BIG); |
|
862
|
634 } |
|
|
635 |
|
529
|
636 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
637 extern "C" |
|
|
638 { |
|
|
639 #include <sys/utsname.h> |
|
|
640 int |
|
|
641 gethostname (char *name, int namelen) |
|
|
642 { |
|
|
643 int i; |
|
|
644 struct utsname ut; |
|
|
645 |
|
|
646 --namelen; |
|
|
647 |
|
|
648 uname (&ut); |
|
|
649 i = strlen (ut.nodename) + 1; |
|
|
650 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
651 name[namelen] = '\0'; |
|
|
652 |
|
|
653 return 0; |
|
|
654 } |
|
|
655 } |
|
|
656 #endif |
|
|
657 |
|
|
658 /* |
|
1
|
659 ;;; Local Variables: *** |
|
|
660 ;;; mode: C++ *** |
|
|
661 ;;; page-delimiter: "^/\\*" *** |
|
|
662 ;;; End: *** |
|
|
663 */ |
