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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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1
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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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1728
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43 #include <string> |
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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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69 |
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70 extern char *term_clrpag; |
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71 extern "C" void _rl_output_character_function (); |
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72 |
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1352
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73 #include "defun.h" |
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74 #include "error.h" |
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75 #include "f77-uscore.h" |
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542
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76 #include "help.h" |
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529
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77 #include "input.h" |
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1352
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78 #include "oct-obj.h" |
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1670
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79 #include "toplev.h" |
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1352
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80 #include "sysdep.h" |
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81 #include "tree-const.h" |
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529
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82 #include "utils.h" |
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83 |
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1463
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84 extern "C" double F77_FCN (d1mach, D1MACH) (const int&); |
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529
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85 |
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86 #ifndef STDIN_FILENO |
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87 #define STDIN_FILENO 1 |
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88 #endif |
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444
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89 |
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90 // Octave's idea of infinity. |
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91 double octave_Inf; |
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92 |
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93 // Octave's idea of not a number. |
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94 double octave_NaN; |
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1
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95 |
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1226
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96 // The floating point format on this system. |
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97 floating_point_format native_float_format = OCTAVE_UNKNOWN_FLT_FMT; |
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98 |
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1415
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99 // Nonzero if the machine we are running on is big-endian. |
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100 int octave_words_big_endian; |
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101 |
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1
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102 #ifdef NeXT |
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103 extern "C" |
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104 { |
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105 typedef void (*_cplus_fcn_int) (int); |
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106 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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107 } |
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108 |
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109 static void |
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110 malloc_handler (int code) |
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111 { |
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112 if (code == 5) |
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217
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113 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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114 else |
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115 { |
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116 panic ("probably irrecoverable malloc error: code %d", code); |
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117 } |
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118 } |
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119 |
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120 static void |
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121 NeXT_init (void) |
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122 { |
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123 malloc_error (malloc_handler); |
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124 } |
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125 #endif |
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126 |
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1226
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127 union equiv |
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128 { |
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129 double d; |
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130 int i[2]; |
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131 }; |
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132 |
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133 struct float_params |
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134 { |
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135 floating_point_format fp_fmt; |
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136 equiv fp_par[4]; |
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137 }; |
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138 |
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139 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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140 do \ |
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141 { \ |
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142 fp.fp_fmt = (fmt); \ |
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143 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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144 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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145 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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146 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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147 } \ |
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148 while (0) |
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149 |
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150 static int |
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151 equiv_compare (const equiv *std, const equiv *v, int len) |
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152 { |
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153 int i; |
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154 for (i = 0; i < len; i++) |
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155 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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156 return 0; |
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157 return 1; |
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158 } |
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159 |
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444
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160 static void |
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161 octave_ieee_init (void) |
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162 { |
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163 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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164 |
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165 // Some version of gcc on some old version of Linux used to crash when |
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166 // trying to make Inf and NaN. |
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167 |
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168 #if defined (HAVE_INFINITY) |
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470
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169 octave_Inf = (double) infinity (); |
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967
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170 #elif defined (linux) |
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444
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171 octave_Inf = HUGE_VAL; |
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967
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172 #elif defined (__alpha__) |
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529
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173 extern unsigned int DINFINITY[2]; |
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174 octave_Inf = (*((double *) (DINFINITY))); |
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175 #else |
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444
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176 double tmp = 1e+10; |
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177 octave_Inf = tmp; |
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178 for (;;) |
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179 { |
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180 octave_Inf *= 1e+10; |
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181 if (octave_Inf == tmp) |
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182 break; |
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183 tmp = octave_Inf; |
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184 } |
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185 #endif |
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529
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186 |
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1384
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187 #endif |
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188 |
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189 #if defined (HAVE_ISNAN) |
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190 |
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444
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191 #if defined (HAVE_QUIET_NAN) |
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470
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192 octave_NaN = (double) quiet_nan (); |
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967
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193 #elif defined (linux) |
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444
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194 octave_NaN = NAN; |
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967
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195 #elif defined (__alpha__) |
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529
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196 extern unsigned int DQNAN[2]; |
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197 octave_NaN = (*((double *) (DQNAN))); |
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198 #else |
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444
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199 octave_NaN = octave_Inf / octave_Inf; |
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200 #endif |
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201 |
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202 #endif |
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1226
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203 |
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204 float_params fp[5]; |
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205 |
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206 INIT_FLT_PAR (fp[0], OCTAVE_IEEE_BIG, |
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207 1048576, 0, |
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208 2146435071, -1, |
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209 1017118720, 0, |
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210 1018167296, 0); |
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211 |
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212 INIT_FLT_PAR (fp[1], OCTAVE_IEEE_LITTLE, |
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213 0, 1048576, |
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214 -1, 2146435071, |
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215 0, 1017118720, |
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216 0, 1018167296); |
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217 |
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218 INIT_FLT_PAR (fp[2], OCTAVE_VAX_D, |
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219 128, 0, |
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220 -32769, -1, |
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221 9344, 0, |
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222 9344, 0); |
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223 |
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224 INIT_FLT_PAR (fp[3], OCTAVE_VAX_G, |
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225 16, 0, |
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226 -32769, -1, |
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227 15552, 0, |
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228 15552, 0); |
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229 |
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230 INIT_FLT_PAR (fp[4], OCTAVE_UNKNOWN_FLT_FMT, |
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231 0, 0, |
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232 0, 0, |
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233 0, 0, |
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234 0, 0); |
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235 |
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236 equiv mach_fp_par[4]; |
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237 |
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1255
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238 mach_fp_par[0].d = F77_FCN (d1mach, D1MACH) (1); |
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239 mach_fp_par[1].d = F77_FCN (d1mach, D1MACH) (2); |
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240 mach_fp_par[2].d = F77_FCN (d1mach, D1MACH) (3); |
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241 mach_fp_par[3].d = F77_FCN (d1mach, D1MACH) (4); |
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242 |
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243 int i = 0; |
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244 do |
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245 { |
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246 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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247 { |
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248 native_float_format = fp[i].fp_fmt; |
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249 break; |
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250 } |
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251 } |
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252 while (fp[++i].fp_fmt != OCTAVE_UNKNOWN_FLT_FMT); |
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253 |
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254 if (native_float_format == OCTAVE_UNKNOWN_FLT_FMT) |
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255 panic ("unrecognized floating point format!"); |
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444
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256 } |
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257 |
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1415
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258 static void |
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259 ten_little_endians (void) |
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260 { |
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261 // Are we little or big endian? From Harbison & Steele. |
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262 |
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263 union |
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264 { |
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265 long l; |
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266 char c[sizeof (long)]; |
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267 } u; |
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268 |
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269 u.l = 1; |
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270 |
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271 octave_words_big_endian = (u.c[sizeof (long) - 1] == 1); |
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272 } |
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273 |
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505
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274 #if defined (EXCEPTION_IN_MATH) |
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275 extern "C" |
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276 int |
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277 matherr (struct exception *x) |
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278 { |
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1358
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279 // Possibly print our own message someday. Should probably be |
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280 // user-switchable. |
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505
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281 |
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282 switch (x->type) |
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283 { |
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284 case DOMAIN: |
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285 case SING: |
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286 case OVERFLOW: |
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287 case UNDERFLOW: |
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288 case TLOSS: |
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289 case PLOSS: |
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290 default: |
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291 break; |
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292 } |
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293 |
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1358
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294 // But don't print the system message. |
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505
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295 |
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296 return 1; |
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297 } |
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1466
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298 #endif |
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505
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299 |
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1
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300 void |
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301 sysdep_init (void) |
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302 { |
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959
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303 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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304 #if defined (HAVE_FLOATINGPOINT_H) |
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1358
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305 // Disable trapping on common exceptions. |
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401
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306 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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307 #endif |
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959
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308 #endif |
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401
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309 |
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1
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310 #ifdef NeXT |
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311 NeXT_init (); |
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312 #endif |
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444
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313 |
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314 octave_ieee_init (); |
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1415
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315 |
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316 ten_little_endians (); |
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1
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317 } |
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318 |
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767
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319 // Set terminal in raw mode. From less-177. |
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320 // |
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321 // Change terminal to "raw mode", or restore to "normal" mode. |
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322 // "Raw mode" means |
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323 // 1. An outstanding read will complete on receipt of a single keystroke. |
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324 // 2. Input is not echoed. |
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325 // 3. On output, \n is mapped to \r\n. |
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326 // 4. \t is NOT expanded into spaces. |
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327 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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328 // etc. are NOT disabled. |
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329 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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330 |
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529
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331 void |
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332 raw_mode (int on) |
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333 { |
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334 static int curr_on = 0; |
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335 |
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336 int tty_fd = STDIN_FILENO; |
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337 if (! isatty (tty_fd)) |
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338 { |
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339 if (interactive) |
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340 error ("stdin is not a tty!"); |
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341 return; |
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342 } |
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343 |
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344 if (on == curr_on) |
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345 return; |
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346 |
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347 #if defined (HAVE_TERMIOS_H) |
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348 { |
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349 struct termios s; |
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350 static struct termios save_term; |
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351 |
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352 if (on) |
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353 { |
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1358
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354 // Get terminal modes. |
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529
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355 |
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356 tcgetattr (tty_fd, &s); |
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357 |
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1358
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358 // Save modes and set certain variables dependent on modes. |
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529
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359 |
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360 save_term = s; |
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361 // ospeed = s.c_cflag & CBAUD; |
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362 // erase_char = s.c_cc[VERASE]; |
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363 // kill_char = s.c_cc[VKILL]; |
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364 |
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1358
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365 // Set the modes to the way we want them. |
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529
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366 |
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367 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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368 s.c_oflag |= (OPOST|ONLCR); |
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369 #if defined (OCRNL) |
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370 s.c_oflag &= ~(OCRNL); |
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371 #endif |
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372 #if defined (ONOCR) |
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373 s.c_oflag &= ~(ONOCR); |
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374 #endif |
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375 #if defined (ONLRET) |
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376 s.c_oflag &= ~(ONLRET); |
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377 #endif |
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378 s.c_cc[VMIN] = 1; |
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379 s.c_cc[VTIME] = 0; |
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380 } |
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381 else |
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382 { |
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1358
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383 // Restore saved modes. |
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384 |
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529
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385 s = save_term; |
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386 } |
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387 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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388 } |
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389 #elif defined (HAVE_TERMIO_H) |
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390 { |
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391 struct termio s; |
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392 static struct termio save_term; |
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393 |
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394 if (on) |
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395 { |
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1358
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396 // Get terminal modes. |
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529
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397 |
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398 ioctl (tty_fd, TCGETA, &s); |
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399 |
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1358
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400 // Save modes and set certain variables dependent on modes. |
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529
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401 |
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402 save_term = s; |
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403 // ospeed = s.c_cflag & CBAUD; |
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404 // erase_char = s.c_cc[VERASE]; |
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405 // kill_char = s.c_cc[VKILL]; |
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406 |
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1358
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407 // Set the modes to the way we want them. |
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529
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408 |
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409 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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410 s.c_oflag |= (OPOST|ONLCR); |
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411 #if defined (OCRNL) |
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412 s.c_oflag &= ~(OCRNL); |
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413 #endif |
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414 #if defined (ONOCR) |
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415 s.c_oflag &= ~(ONOCR); |
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416 #endif |
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417 #if defined (ONLRET) |
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418 s.c_oflag &= ~(ONLRET); |
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419 #endif |
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420 s.c_cc[VMIN] = 1; |
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421 s.c_cc[VTIME] = 0; |
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422 } |
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423 else |
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424 { |
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1358
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425 // Restore saved modes. |
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426 |
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529
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427 s = save_term; |
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428 } |
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429 ioctl (tty_fd, TCSETAW, &s); |
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430 } |
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431 #elif defined (HAVE_SGTTY_H) |
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432 { |
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433 struct sgttyb s; |
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434 static struct sgttyb save_term; |
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435 |
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436 if (on) |
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437 { |
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1358
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438 // Get terminal modes. |
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529
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439 |
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440 ioctl (tty_fd, TIOCGETP, &s); |
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441 |
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1358
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442 // Save modes and set certain variables dependent on modes. |
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529
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443 |
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444 save_term = s; |
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445 // ospeed = s.sg_ospeed; |
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446 // erase_char = s.sg_erase; |
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447 // kill_char = s.sg_kill; |
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448 |
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1358
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449 // Set the modes to the way we want them. |
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529
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450 |
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451 s.sg_flags |= CBREAK; |
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452 s.sg_flags &= ~(ECHO); |
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453 } |
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454 else |
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455 { |
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1358
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456 // Restore saved modes. |
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457 |
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529
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458 s = save_term; |
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459 } |
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460 ioctl (tty_fd, TIOCSETN, &s); |
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461 } |
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462 #else |
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463 LOSE! LOSE! |
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464 #endif |
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465 |
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466 curr_on = on; |
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467 } |
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468 |
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767
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469 // Read one character from the terminal. |
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470 |
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529
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471 int |
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472 kbhit (void) |
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473 { |
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474 int c; |
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475 raw_mode (1); |
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476 c = cin.get (); |
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477 raw_mode (0); |
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478 return c; |
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479 } |
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480 |
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1111
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481 char * |
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1126
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482 octave_getcwd (char *buf, int len) |
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1111
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483 { |
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1113
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484 #if defined (__EMX__) |
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1111
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485 return _getcwd2 (buf, len); |
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486 #else |
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487 return getcwd (buf, len); |
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488 #endif |
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489 } |
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490 |
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491 int |
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1128
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492 octave_chdir (const char *path) |
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1111
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493 { |
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1113
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494 #if defined (__EMX__) |
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1111
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495 int retval = -1; |
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496 |
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497 if (strlen (path) == 2 && path[1] == ':') |
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498 { |
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499 char *upper_case_dir_name = strupr (path); |
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500 _chdrive (upper_case_dir_name[0]); |
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501 if (_getdrive () == upper_case_dir_name[0]) |
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502 retval = _chdir2 ("/"); |
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503 } |
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504 else |
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505 retval = _chdir2 (path); |
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506 |
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507 return retval; |
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508 #else |
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509 return chdir (path); |
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510 #endif |
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511 } |
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512 |
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1488
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513 DEFUN ("clc", Fclc, Sclc, 00, |
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529
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514 "clc (): clear screen") |
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515 { |
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516 Octave_object retval; |
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517 |
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518 rl_beg_of_line (); |
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519 rl_kill_line (1); |
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520 |
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521 #if ! defined (_GO32_) |
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522 if (term_clrpag) |
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523 tputs (term_clrpag, 1, _rl_output_character_function); |
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524 else |
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525 crlf (); |
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526 #else |
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527 crlf (); |
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528 #endif |
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529 |
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530 fflush (rl_outstream); |
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531 |
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532 return retval; |
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533 } |
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534 |
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549
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535 DEFALIAS (home, clc); |
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536 |
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1488
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537 DEFUN ("getenv", Fgetenv, Sgetenv, 10, |
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529
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538 "getenv (STRING): get environment variable values") |
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539 { |
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540 Octave_object retval; |
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541 |
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542 int nargin = args.length (); |
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543 |
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712
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544 if (nargin == 1) |
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529
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545 { |
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1728
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546 string tstr = args(0).string_value (); |
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547 const char *name = tstr.c_str (); |
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636
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548 |
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549 if (! error_state) |
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550 { |
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551 char *value = getenv (name); |
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552 if (value) |
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553 retval = value; |
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554 else |
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555 retval = ""; |
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556 } |
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529
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557 } |
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558 else |
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559 print_usage ("getenv"); |
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560 |
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561 return retval; |
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562 } |
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563 |
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1706
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564 DEFUN ("putenv", Fputenv, Sputenv, 10, |
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565 "putenv (VAR, VALUE): define environment variable VAR=VALUE") |
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566 { |
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567 Octave_object retval; |
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568 |
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569 int nargin = args.length (); |
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570 |
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571 if (nargin == 2) |
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572 { |
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1728
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573 string tstr1 = args(0).string_value (); |
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574 const char *var = tstr1.c_str (); |
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1706
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575 |
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576 if (! error_state) |
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577 { |
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1728
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578 string tstr2 = args(1).string_value (); |
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579 const char *val = tstr2.c_str (); |
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1706
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580 |
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581 if (! error_state) |
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1711
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582 oct_putenv (var, val); |
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1706
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583 else |
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584 error ("putenv: second argument should be a string"); |
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585 } |
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586 else |
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587 error ("putenv: first argument should be a string"); |
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588 } |
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589 else |
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590 print_usage ("putenv"); |
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591 |
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592 return retval; |
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593 } |
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594 |
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1488
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595 DEFUN ("kbhit", Fkbhit, Skbhit, 00, |
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529
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596 "kbhit: get a single character from the terminal") |
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597 { |
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598 Octave_object retval; |
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599 |
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1358
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600 // XXX FIXME XXX -- add timeout and default value args? |
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529
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601 |
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602 if (interactive) |
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603 { |
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604 int c = kbhit (); |
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605 char *s = new char [2]; |
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606 s[0] = c; |
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607 s[1] = '\0'; |
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608 retval = s; |
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609 } |
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610 |
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611 return retval; |
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612 } |
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613 |
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1488
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614 DEFUN ("pause", Fpause, Spause, 10, |
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529
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615 "pause (seconds): suspend program execution") |
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616 { |
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617 Octave_object retval; |
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618 |
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619 int nargin = args.length (); |
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620 |
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712
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621 if (! (nargin == 0 || nargin == 1)) |
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529
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622 { |
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623 print_usage ("pause"); |
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624 return retval; |
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625 } |
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626 |
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1579
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627 if (nargin == 1) |
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529
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628 { |
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1579
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629 double dval = args(0).double_value (); |
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636
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630 |
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1579
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631 if (! error_state) |
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632 { |
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633 if (xisnan (dval)) |
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634 warning ("pause: NaN is an invalid delay"); |
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635 else |
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636 { |
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637 int delay = NINT (dval); |
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638 if (delay > 0) |
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639 sleep (delay); |
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640 } |
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529
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641 } |
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642 } |
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1579
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643 else |
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644 { |
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645 if (kbhit () == EOF) |
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646 clean_up_and_exit (0); |
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647 } |
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529
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648 |
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649 return retval; |
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650 } |
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651 |
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862
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652 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
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653 // point functions really work. |
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654 |
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1488
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655 DEFUN ("isieee", Fisieee, Sisieee, 00, |
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862
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656 "isieee (): return 1 if host uses IEEE floating point") |
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657 { |
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1226
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658 return (double) (native_float_format == OCTAVE_IEEE_LITTLE |
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659 || native_float_format == OCTAVE_IEEE_BIG); |
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862
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660 } |
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661 |
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529
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662 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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663 int |
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664 gethostname (char *name, int namelen) |
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665 { |
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666 int i; |
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667 struct utsname ut; |
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668 |
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669 --namelen; |
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670 |
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671 uname (&ut); |
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672 i = strlen (ut.nodename) + 1; |
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673 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
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674 name[namelen] = '\0'; |
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675 |
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676 return 0; |
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677 } |
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678 #endif |
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679 |
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680 /* |
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1
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681 ;;; Local Variables: *** |
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682 ;;; mode: C++ *** |
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683 ;;; page-delimiter: "^/\\*" *** |
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684 ;;; End: *** |
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685 */ |
