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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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1742
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45 #include <iostream.h> |
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46 |
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1350
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47 #ifdef HAVE_UNISTD_H |
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529
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48 #include <sys/types.h> |
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49 #include <unistd.h> |
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50 #endif |
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1
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51 |
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1430
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52 #if defined (HAVE_TERMIOS_H) |
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53 #include <termios.h> |
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54 #elif defined (HAVE_TERMIO_H) |
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55 #include <termio.h> |
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56 #elif defined (HAVE_SGTTY_H) |
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57 #include <sgtty.h> |
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58 #else |
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59 LOSE! LOSE! |
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60 #endif |
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61 |
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1463
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62 #if defined (HAVE_FLOATINGPOINT_H) |
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63 #include <floatingpoint.h> |
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64 #endif |
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65 |
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66 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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67 #include <sys/utsname.h> |
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68 #endif |
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69 |
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70 #include <readline/readline.h> |
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71 |
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72 extern char *term_clrpag; |
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73 extern "C" void _rl_output_character_function (); |
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74 |
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1352
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75 #include "defun.h" |
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76 #include "error.h" |
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77 #include "f77-uscore.h" |
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542
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78 #include "help.h" |
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529
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79 #include "input.h" |
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1742
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80 #include "mappers.h" |
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1670
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81 #include "toplev.h" |
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1352
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82 #include "sysdep.h" |
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1742
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83 #include "pt-const.h" |
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84 #include "oct-obj.h" |
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529
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85 #include "utils.h" |
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86 |
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1463
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87 extern "C" double F77_FCN (d1mach, D1MACH) (const int&); |
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529
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88 |
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89 #ifndef STDIN_FILENO |
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90 #define STDIN_FILENO 1 |
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91 #endif |
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444
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92 |
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93 // Octave's idea of infinity. |
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94 double octave_Inf; |
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95 |
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96 // Octave's idea of not a number. |
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97 double octave_NaN; |
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98 |
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1226
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99 // The floating point format on this system. |
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100 floating_point_format native_float_format = OCTAVE_UNKNOWN_FLT_FMT; |
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101 |
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1415
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102 // Nonzero if the machine we are running on is big-endian. |
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103 int octave_words_big_endian; |
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104 |
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1
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105 #ifdef NeXT |
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106 extern "C" |
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107 { |
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108 typedef void (*_cplus_fcn_int) (int); |
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109 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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110 } |
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111 |
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112 static void |
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113 malloc_handler (int code) |
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114 { |
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115 if (code == 5) |
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217
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116 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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117 else |
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118 { |
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119 panic ("probably irrecoverable malloc error: code %d", code); |
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120 } |
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121 } |
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122 |
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123 static void |
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124 NeXT_init (void) |
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125 { |
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126 malloc_error (malloc_handler); |
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127 } |
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128 #endif |
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129 |
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1226
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130 union equiv |
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131 { |
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132 double d; |
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133 int i[2]; |
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134 }; |
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135 |
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136 struct float_params |
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137 { |
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138 floating_point_format fp_fmt; |
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139 equiv fp_par[4]; |
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140 }; |
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141 |
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142 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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143 do \ |
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144 { \ |
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145 fp.fp_fmt = (fmt); \ |
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146 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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147 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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148 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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149 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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150 } \ |
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151 while (0) |
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152 |
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153 static int |
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154 equiv_compare (const equiv *std, const equiv *v, int len) |
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155 { |
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156 int i; |
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157 for (i = 0; i < len; i++) |
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158 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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159 return 0; |
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160 return 1; |
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161 } |
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162 |
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444
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163 static void |
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164 octave_ieee_init (void) |
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165 { |
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166 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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167 |
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168 // Some version of gcc on some old version of Linux used to crash when |
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169 // trying to make Inf and NaN. |
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170 |
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171 #if defined (HAVE_INFINITY) |
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470
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172 octave_Inf = (double) infinity (); |
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967
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173 #elif defined (linux) |
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444
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174 octave_Inf = HUGE_VAL; |
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967
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175 #elif defined (__alpha__) |
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529
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176 extern unsigned int DINFINITY[2]; |
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177 octave_Inf = (*((double *) (DINFINITY))); |
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178 #else |
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444
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179 double tmp = 1e+10; |
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180 octave_Inf = tmp; |
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181 for (;;) |
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182 { |
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183 octave_Inf *= 1e+10; |
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184 if (octave_Inf == tmp) |
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185 break; |
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186 tmp = octave_Inf; |
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187 } |
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188 #endif |
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529
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189 |
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1384
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190 #endif |
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191 |
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192 #if defined (HAVE_ISNAN) |
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193 |
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444
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194 #if defined (HAVE_QUIET_NAN) |
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470
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195 octave_NaN = (double) quiet_nan (); |
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967
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196 #elif defined (linux) |
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444
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197 octave_NaN = NAN; |
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967
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198 #elif defined (__alpha__) |
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529
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199 extern unsigned int DQNAN[2]; |
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200 octave_NaN = (*((double *) (DQNAN))); |
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201 #else |
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444
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202 octave_NaN = octave_Inf / octave_Inf; |
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203 #endif |
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204 |
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205 #endif |
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1226
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206 |
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207 float_params fp[5]; |
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208 |
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209 INIT_FLT_PAR (fp[0], OCTAVE_IEEE_BIG, |
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210 1048576, 0, |
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211 2146435071, -1, |
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212 1017118720, 0, |
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213 1018167296, 0); |
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214 |
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215 INIT_FLT_PAR (fp[1], OCTAVE_IEEE_LITTLE, |
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216 0, 1048576, |
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217 -1, 2146435071, |
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218 0, 1017118720, |
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219 0, 1018167296); |
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220 |
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221 INIT_FLT_PAR (fp[2], OCTAVE_VAX_D, |
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222 128, 0, |
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223 -32769, -1, |
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224 9344, 0, |
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225 9344, 0); |
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226 |
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227 INIT_FLT_PAR (fp[3], OCTAVE_VAX_G, |
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228 16, 0, |
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229 -32769, -1, |
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230 15552, 0, |
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231 15552, 0); |
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232 |
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233 INIT_FLT_PAR (fp[4], OCTAVE_UNKNOWN_FLT_FMT, |
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234 0, 0, |
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235 0, 0, |
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236 0, 0, |
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237 0, 0); |
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238 |
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239 equiv mach_fp_par[4]; |
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240 |
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1255
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241 mach_fp_par[0].d = F77_FCN (d1mach, D1MACH) (1); |
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242 mach_fp_par[1].d = F77_FCN (d1mach, D1MACH) (2); |
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243 mach_fp_par[2].d = F77_FCN (d1mach, D1MACH) (3); |
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244 mach_fp_par[3].d = F77_FCN (d1mach, D1MACH) (4); |
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245 |
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246 int i = 0; |
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247 do |
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248 { |
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249 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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250 { |
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251 native_float_format = fp[i].fp_fmt; |
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252 break; |
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253 } |
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254 } |
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255 while (fp[++i].fp_fmt != OCTAVE_UNKNOWN_FLT_FMT); |
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256 |
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257 if (native_float_format == OCTAVE_UNKNOWN_FLT_FMT) |
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258 panic ("unrecognized floating point format!"); |
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444
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259 } |
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260 |
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1415
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261 static void |
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262 ten_little_endians (void) |
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263 { |
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264 // Are we little or big endian? From Harbison & Steele. |
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265 |
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266 union |
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267 { |
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268 long l; |
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269 char c[sizeof (long)]; |
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270 } u; |
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271 |
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272 u.l = 1; |
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273 |
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274 octave_words_big_endian = (u.c[sizeof (long) - 1] == 1); |
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275 } |
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276 |
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505
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277 #if defined (EXCEPTION_IN_MATH) |
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278 extern "C" |
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279 int |
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280 matherr (struct exception *x) |
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281 { |
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1358
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282 // Possibly print our own message someday. Should probably be |
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283 // user-switchable. |
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505
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284 |
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285 switch (x->type) |
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286 { |
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287 case DOMAIN: |
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288 case SING: |
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289 case OVERFLOW: |
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290 case UNDERFLOW: |
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291 case TLOSS: |
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292 case PLOSS: |
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293 default: |
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294 break; |
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295 } |
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296 |
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1358
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297 // But don't print the system message. |
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505
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298 |
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299 return 1; |
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300 } |
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1466
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301 #endif |
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505
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302 |
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1
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303 void |
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304 sysdep_init (void) |
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305 { |
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959
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306 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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307 #if defined (HAVE_FLOATINGPOINT_H) |
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1358
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308 // Disable trapping on common exceptions. |
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401
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309 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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310 #endif |
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959
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311 #endif |
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401
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312 |
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1
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313 #ifdef NeXT |
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314 NeXT_init (); |
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315 #endif |
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444
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316 |
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317 octave_ieee_init (); |
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1415
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318 |
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319 ten_little_endians (); |
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1
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320 } |
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321 |
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767
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322 // Set terminal in raw mode. From less-177. |
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323 // |
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324 // Change terminal to "raw mode", or restore to "normal" mode. |
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325 // "Raw mode" means |
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326 // 1. An outstanding read will complete on receipt of a single keystroke. |
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327 // 2. Input is not echoed. |
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328 // 3. On output, \n is mapped to \r\n. |
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329 // 4. \t is NOT expanded into spaces. |
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330 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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331 // etc. are NOT disabled. |
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332 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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333 |
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529
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334 void |
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335 raw_mode (int on) |
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336 { |
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337 static int curr_on = 0; |
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338 |
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339 int tty_fd = STDIN_FILENO; |
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340 if (! isatty (tty_fd)) |
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341 { |
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342 if (interactive) |
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343 error ("stdin is not a tty!"); |
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344 return; |
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345 } |
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346 |
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347 if (on == curr_on) |
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348 return; |
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349 |
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350 #if defined (HAVE_TERMIOS_H) |
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351 { |
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352 struct termios s; |
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353 static struct termios save_term; |
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354 |
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355 if (on) |
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356 { |
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1358
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357 // Get terminal modes. |
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529
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358 |
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359 tcgetattr (tty_fd, &s); |
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360 |
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1358
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361 // Save modes and set certain variables dependent on modes. |
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529
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362 |
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363 save_term = s; |
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364 // ospeed = s.c_cflag & CBAUD; |
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365 // erase_char = s.c_cc[VERASE]; |
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366 // kill_char = s.c_cc[VKILL]; |
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367 |
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1358
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368 // Set the modes to the way we want them. |
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529
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369 |
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370 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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371 s.c_oflag |= (OPOST|ONLCR); |
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372 #if defined (OCRNL) |
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373 s.c_oflag &= ~(OCRNL); |
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374 #endif |
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375 #if defined (ONOCR) |
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376 s.c_oflag &= ~(ONOCR); |
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377 #endif |
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378 #if defined (ONLRET) |
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379 s.c_oflag &= ~(ONLRET); |
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380 #endif |
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381 s.c_cc[VMIN] = 1; |
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382 s.c_cc[VTIME] = 0; |
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383 } |
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384 else |
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385 { |
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1358
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386 // Restore saved modes. |
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387 |
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529
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388 s = save_term; |
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389 } |
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390 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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391 } |
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392 #elif defined (HAVE_TERMIO_H) |
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393 { |
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394 struct termio s; |
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395 static struct termio save_term; |
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396 |
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397 if (on) |
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398 { |
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1358
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399 // Get terminal modes. |
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529
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400 |
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401 ioctl (tty_fd, TCGETA, &s); |
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402 |
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1358
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403 // Save modes and set certain variables dependent on modes. |
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529
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404 |
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405 save_term = s; |
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406 // ospeed = s.c_cflag & CBAUD; |
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407 // erase_char = s.c_cc[VERASE]; |
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408 // kill_char = s.c_cc[VKILL]; |
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409 |
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1358
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410 // Set the modes to the way we want them. |
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529
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411 |
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412 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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413 s.c_oflag |= (OPOST|ONLCR); |
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414 #if defined (OCRNL) |
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415 s.c_oflag &= ~(OCRNL); |
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416 #endif |
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417 #if defined (ONOCR) |
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418 s.c_oflag &= ~(ONOCR); |
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419 #endif |
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420 #if defined (ONLRET) |
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421 s.c_oflag &= ~(ONLRET); |
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422 #endif |
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423 s.c_cc[VMIN] = 1; |
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424 s.c_cc[VTIME] = 0; |
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425 } |
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426 else |
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427 { |
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1358
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428 // Restore saved modes. |
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429 |
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529
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430 s = save_term; |
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431 } |
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432 ioctl (tty_fd, TCSETAW, &s); |
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433 } |
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434 #elif defined (HAVE_SGTTY_H) |
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435 { |
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436 struct sgttyb s; |
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437 static struct sgttyb save_term; |
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438 |
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439 if (on) |
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440 { |
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1358
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441 // Get terminal modes. |
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529
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442 |
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443 ioctl (tty_fd, TIOCGETP, &s); |
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444 |
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1358
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445 // Save modes and set certain variables dependent on modes. |
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529
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446 |
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447 save_term = s; |
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448 // ospeed = s.sg_ospeed; |
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449 // erase_char = s.sg_erase; |
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450 // kill_char = s.sg_kill; |
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451 |
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1358
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452 // Set the modes to the way we want them. |
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529
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453 |
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454 s.sg_flags |= CBREAK; |
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455 s.sg_flags &= ~(ECHO); |
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456 } |
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457 else |
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458 { |
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1358
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459 // Restore saved modes. |
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460 |
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529
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461 s = save_term; |
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462 } |
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463 ioctl (tty_fd, TIOCSETN, &s); |
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464 } |
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465 #else |
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466 LOSE! LOSE! |
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467 #endif |
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468 |
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469 curr_on = on; |
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470 } |
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471 |
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767
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472 // Read one character from the terminal. |
|
|
473 |
|
529
|
474 int |
|
|
475 kbhit (void) |
|
|
476 { |
|
|
477 int c; |
|
|
478 raw_mode (1); |
|
|
479 c = cin.get (); |
|
|
480 raw_mode (0); |
|
|
481 return c; |
|
|
482 } |
|
|
483 |
|
1111
|
484 char * |
|
1126
|
485 octave_getcwd (char *buf, int len) |
|
1111
|
486 { |
|
1113
|
487 #if defined (__EMX__) |
|
1111
|
488 return _getcwd2 (buf, len); |
|
|
489 #else |
|
|
490 return getcwd (buf, len); |
|
|
491 #endif |
|
|
492 } |
|
|
493 |
|
|
494 int |
|
1128
|
495 octave_chdir (const char *path) |
|
1111
|
496 { |
|
1113
|
497 #if defined (__EMX__) |
|
1111
|
498 int retval = -1; |
|
|
499 |
|
|
500 if (strlen (path) == 2 && path[1] == ':') |
|
|
501 { |
|
|
502 char *upper_case_dir_name = strupr (path); |
|
|
503 _chdrive (upper_case_dir_name[0]); |
|
|
504 if (_getdrive () == upper_case_dir_name[0]) |
|
|
505 retval = _chdir2 ("/"); |
|
|
506 } |
|
|
507 else |
|
|
508 retval = _chdir2 (path); |
|
|
509 |
|
|
510 return retval; |
|
|
511 #else |
|
|
512 return chdir (path); |
|
|
513 #endif |
|
|
514 } |
|
|
515 |
|
1488
|
516 DEFUN ("clc", Fclc, Sclc, 00, |
|
529
|
517 "clc (): clear screen") |
|
|
518 { |
|
|
519 Octave_object retval; |
|
|
520 |
|
|
521 rl_beg_of_line (); |
|
|
522 rl_kill_line (1); |
|
|
523 |
|
|
524 #if ! defined (_GO32_) |
|
|
525 if (term_clrpag) |
|
|
526 tputs (term_clrpag, 1, _rl_output_character_function); |
|
|
527 else |
|
|
528 crlf (); |
|
|
529 #else |
|
|
530 crlf (); |
|
|
531 #endif |
|
|
532 |
|
|
533 fflush (rl_outstream); |
|
|
534 |
|
|
535 return retval; |
|
|
536 } |
|
|
537 |
|
549
|
538 DEFALIAS (home, clc); |
|
|
539 |
|
1488
|
540 DEFUN ("getenv", Fgetenv, Sgetenv, 10, |
|
529
|
541 "getenv (STRING): get environment variable values") |
|
|
542 { |
|
|
543 Octave_object retval; |
|
|
544 |
|
|
545 int nargin = args.length (); |
|
|
546 |
|
712
|
547 if (nargin == 1) |
|
529
|
548 { |
|
1728
|
549 string tstr = args(0).string_value (); |
|
|
550 const char *name = tstr.c_str (); |
|
636
|
551 |
|
|
552 if (! error_state) |
|
|
553 { |
|
|
554 char *value = getenv (name); |
|
|
555 if (value) |
|
|
556 retval = value; |
|
|
557 else |
|
|
558 retval = ""; |
|
|
559 } |
|
529
|
560 } |
|
|
561 else |
|
|
562 print_usage ("getenv"); |
|
|
563 |
|
|
564 return retval; |
|
|
565 } |
|
|
566 |
|
1706
|
567 DEFUN ("putenv", Fputenv, Sputenv, 10, |
|
|
568 "putenv (VAR, VALUE): define environment variable VAR=VALUE") |
|
|
569 { |
|
|
570 Octave_object retval; |
|
|
571 |
|
|
572 int nargin = args.length (); |
|
|
573 |
|
|
574 if (nargin == 2) |
|
|
575 { |
|
1728
|
576 string tstr1 = args(0).string_value (); |
|
|
577 const char *var = tstr1.c_str (); |
|
1706
|
578 |
|
|
579 if (! error_state) |
|
|
580 { |
|
1728
|
581 string tstr2 = args(1).string_value (); |
|
|
582 const char *val = tstr2.c_str (); |
|
1706
|
583 |
|
|
584 if (! error_state) |
|
1711
|
585 oct_putenv (var, val); |
|
1706
|
586 else |
|
|
587 error ("putenv: second argument should be a string"); |
|
|
588 } |
|
|
589 else |
|
|
590 error ("putenv: first argument should be a string"); |
|
|
591 } |
|
|
592 else |
|
|
593 print_usage ("putenv"); |
|
|
594 |
|
|
595 return retval; |
|
|
596 } |
|
|
597 |
|
1488
|
598 DEFUN ("kbhit", Fkbhit, Skbhit, 00, |
|
529
|
599 "kbhit: get a single character from the terminal") |
|
|
600 { |
|
|
601 Octave_object retval; |
|
|
602 |
|
1358
|
603 // XXX FIXME XXX -- add timeout and default value args? |
|
529
|
604 |
|
|
605 if (interactive) |
|
|
606 { |
|
|
607 int c = kbhit (); |
|
|
608 char *s = new char [2]; |
|
|
609 s[0] = c; |
|
|
610 s[1] = '\0'; |
|
|
611 retval = s; |
|
|
612 } |
|
|
613 |
|
|
614 return retval; |
|
|
615 } |
|
|
616 |
|
1488
|
617 DEFUN ("pause", Fpause, Spause, 10, |
|
529
|
618 "pause (seconds): suspend program execution") |
|
|
619 { |
|
|
620 Octave_object retval; |
|
|
621 |
|
|
622 int nargin = args.length (); |
|
|
623 |
|
712
|
624 if (! (nargin == 0 || nargin == 1)) |
|
529
|
625 { |
|
|
626 print_usage ("pause"); |
|
|
627 return retval; |
|
|
628 } |
|
|
629 |
|
1579
|
630 if (nargin == 1) |
|
529
|
631 { |
|
1579
|
632 double dval = args(0).double_value (); |
|
636
|
633 |
|
1579
|
634 if (! error_state) |
|
|
635 { |
|
|
636 if (xisnan (dval)) |
|
|
637 warning ("pause: NaN is an invalid delay"); |
|
|
638 else |
|
|
639 { |
|
|
640 int delay = NINT (dval); |
|
|
641 if (delay > 0) |
|
|
642 sleep (delay); |
|
|
643 } |
|
529
|
644 } |
|
|
645 } |
|
1579
|
646 else |
|
|
647 { |
|
|
648 if (kbhit () == EOF) |
|
|
649 clean_up_and_exit (0); |
|
|
650 } |
|
529
|
651 |
|
|
652 return retval; |
|
|
653 } |
|
|
654 |
|
862
|
655 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
|
|
656 // point functions really work. |
|
|
657 |
|
1488
|
658 DEFUN ("isieee", Fisieee, Sisieee, 00, |
|
862
|
659 "isieee (): return 1 if host uses IEEE floating point") |
|
|
660 { |
|
1226
|
661 return (double) (native_float_format == OCTAVE_IEEE_LITTLE |
|
|
662 || native_float_format == OCTAVE_IEEE_BIG); |
|
862
|
663 } |
|
|
664 |
|
529
|
665 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
666 int |
|
|
667 gethostname (char *name, int namelen) |
|
|
668 { |
|
|
669 int i; |
|
|
670 struct utsname ut; |
|
|
671 |
|
|
672 --namelen; |
|
|
673 |
|
|
674 uname (&ut); |
|
|
675 i = strlen (ut.nodename) + 1; |
|
|
676 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
677 name[namelen] = '\0'; |
|
|
678 |
|
|
679 return 0; |
|
|
680 } |
|
|
681 #endif |
|
|
682 |
|
|
683 /* |
|
1
|
684 ;;; Local Variables: *** |
|
|
685 ;;; mode: C++ *** |
|
|
686 ;;; page-delimiter: "^/\\*" *** |
|
|
687 ;;; End: *** |
|
|
688 */ |
