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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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1350
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43 #ifdef HAVE_UNISTD_H |
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529
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44 #include <sys/types.h> |
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45 #include <unistd.h> |
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46 #endif |
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1
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47 |
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1430
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48 #if defined (HAVE_TERMIOS_H) |
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49 #include <termios.h> |
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50 #elif defined (HAVE_TERMIO_H) |
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51 #include <termio.h> |
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52 #elif defined (HAVE_SGTTY_H) |
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53 #include <sgtty.h> |
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54 #else |
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55 LOSE! LOSE! |
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56 #endif |
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57 |
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1463
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58 #if defined (HAVE_FLOATINGPOINT_H) |
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59 #include <floatingpoint.h> |
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60 #endif |
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61 |
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62 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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63 #include <sys/utsname.h> |
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64 #endif |
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65 |
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66 #include <readline/readline.h> |
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67 |
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68 extern char *term_clrpag; |
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69 extern "C" void _rl_output_character_function (); |
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70 |
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1352
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71 #include "defun.h" |
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72 #include "error.h" |
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73 #include "f77-uscore.h" |
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542
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74 #include "help.h" |
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529
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75 #include "input.h" |
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1352
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76 #include "oct-obj.h" |
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1670
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77 #include "toplev.h" |
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1352
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78 #include "sysdep.h" |
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79 #include "tree-const.h" |
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529
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80 #include "utils.h" |
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81 |
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1463
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82 extern "C" double F77_FCN (d1mach, D1MACH) (const int&); |
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529
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83 |
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84 #ifndef STDIN_FILENO |
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85 #define STDIN_FILENO 1 |
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86 #endif |
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444
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87 |
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88 // Octave's idea of infinity. |
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89 double octave_Inf; |
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90 |
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91 // Octave's idea of not a number. |
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92 double octave_NaN; |
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1
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93 |
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1226
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94 // The floating point format on this system. |
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95 floating_point_format native_float_format = OCTAVE_UNKNOWN_FLT_FMT; |
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96 |
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1415
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97 // Nonzero if the machine we are running on is big-endian. |
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98 int octave_words_big_endian; |
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99 |
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1
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100 #ifdef NeXT |
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101 extern "C" |
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102 { |
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103 typedef void (*_cplus_fcn_int) (int); |
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104 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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105 } |
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106 |
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107 static void |
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108 malloc_handler (int code) |
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109 { |
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110 if (code == 5) |
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217
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111 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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112 else |
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113 { |
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114 panic ("probably irrecoverable malloc error: code %d", code); |
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115 } |
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116 } |
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117 |
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118 static void |
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119 NeXT_init (void) |
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120 { |
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121 malloc_error (malloc_handler); |
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122 } |
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123 #endif |
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124 |
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1226
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125 union equiv |
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126 { |
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127 double d; |
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128 int i[2]; |
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129 }; |
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130 |
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131 struct float_params |
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132 { |
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133 floating_point_format fp_fmt; |
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134 equiv fp_par[4]; |
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135 }; |
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136 |
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137 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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138 do \ |
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139 { \ |
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140 fp.fp_fmt = (fmt); \ |
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141 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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142 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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143 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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144 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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145 } \ |
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146 while (0) |
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147 |
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148 static int |
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149 equiv_compare (const equiv *std, const equiv *v, int len) |
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150 { |
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151 int i; |
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152 for (i = 0; i < len; i++) |
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153 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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154 return 0; |
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155 return 1; |
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156 } |
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157 |
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444
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158 static void |
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159 octave_ieee_init (void) |
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160 { |
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161 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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162 |
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163 // Some version of gcc on some old version of Linux used to crash when |
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164 // trying to make Inf and NaN. |
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165 |
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166 #if defined (HAVE_INFINITY) |
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470
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167 octave_Inf = (double) infinity (); |
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967
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168 #elif defined (linux) |
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444
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169 octave_Inf = HUGE_VAL; |
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967
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170 #elif defined (__alpha__) |
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529
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171 extern unsigned int DINFINITY[2]; |
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172 octave_Inf = (*((double *) (DINFINITY))); |
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173 #else |
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444
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174 double tmp = 1e+10; |
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175 octave_Inf = tmp; |
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176 for (;;) |
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177 { |
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178 octave_Inf *= 1e+10; |
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179 if (octave_Inf == tmp) |
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180 break; |
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181 tmp = octave_Inf; |
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182 } |
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183 #endif |
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529
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184 |
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1384
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185 #endif |
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186 |
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187 #if defined (HAVE_ISNAN) |
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188 |
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444
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189 #if defined (HAVE_QUIET_NAN) |
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470
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190 octave_NaN = (double) quiet_nan (); |
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967
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191 #elif defined (linux) |
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444
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192 octave_NaN = NAN; |
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967
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193 #elif defined (__alpha__) |
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529
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194 extern unsigned int DQNAN[2]; |
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195 octave_NaN = (*((double *) (DQNAN))); |
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196 #else |
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444
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197 octave_NaN = octave_Inf / octave_Inf; |
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198 #endif |
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199 |
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200 #endif |
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201 |
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202 float_params fp[5]; |
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203 |
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204 INIT_FLT_PAR (fp[0], OCTAVE_IEEE_BIG, |
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205 1048576, 0, |
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206 2146435071, -1, |
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207 1017118720, 0, |
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208 1018167296, 0); |
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209 |
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210 INIT_FLT_PAR (fp[1], OCTAVE_IEEE_LITTLE, |
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211 0, 1048576, |
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212 -1, 2146435071, |
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213 0, 1017118720, |
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214 0, 1018167296); |
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215 |
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216 INIT_FLT_PAR (fp[2], OCTAVE_VAX_D, |
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217 128, 0, |
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218 -32769, -1, |
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219 9344, 0, |
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220 9344, 0); |
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221 |
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222 INIT_FLT_PAR (fp[3], OCTAVE_VAX_G, |
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223 16, 0, |
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224 -32769, -1, |
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225 15552, 0, |
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226 15552, 0); |
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227 |
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228 INIT_FLT_PAR (fp[4], OCTAVE_UNKNOWN_FLT_FMT, |
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229 0, 0, |
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230 0, 0, |
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231 0, 0, |
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232 0, 0); |
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233 |
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234 equiv mach_fp_par[4]; |
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235 |
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1255
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236 mach_fp_par[0].d = F77_FCN (d1mach, D1MACH) (1); |
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237 mach_fp_par[1].d = F77_FCN (d1mach, D1MACH) (2); |
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238 mach_fp_par[2].d = F77_FCN (d1mach, D1MACH) (3); |
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239 mach_fp_par[3].d = F77_FCN (d1mach, D1MACH) (4); |
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240 |
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241 int i = 0; |
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242 do |
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243 { |
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244 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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245 { |
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246 native_float_format = fp[i].fp_fmt; |
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247 break; |
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248 } |
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249 } |
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250 while (fp[++i].fp_fmt != OCTAVE_UNKNOWN_FLT_FMT); |
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251 |
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252 if (native_float_format == OCTAVE_UNKNOWN_FLT_FMT) |
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253 panic ("unrecognized floating point format!"); |
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444
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254 } |
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255 |
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1415
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256 static void |
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257 ten_little_endians (void) |
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258 { |
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259 // Are we little or big endian? From Harbison & Steele. |
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260 |
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261 union |
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262 { |
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263 long l; |
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264 char c[sizeof (long)]; |
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265 } u; |
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266 |
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267 u.l = 1; |
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268 |
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269 octave_words_big_endian = (u.c[sizeof (long) - 1] == 1); |
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270 } |
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271 |
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505
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272 #if defined (EXCEPTION_IN_MATH) |
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273 extern "C" |
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274 int |
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275 matherr (struct exception *x) |
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276 { |
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1358
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277 // Possibly print our own message someday. Should probably be |
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278 // user-switchable. |
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505
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279 |
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280 switch (x->type) |
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281 { |
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282 case DOMAIN: |
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283 case SING: |
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284 case OVERFLOW: |
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285 case UNDERFLOW: |
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286 case TLOSS: |
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287 case PLOSS: |
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288 default: |
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289 break; |
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290 } |
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291 |
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1358
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292 // But don't print the system message. |
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505
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293 |
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294 return 1; |
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295 } |
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1466
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296 #endif |
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505
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297 |
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1
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298 void |
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299 sysdep_init (void) |
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300 { |
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959
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301 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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302 #if defined (HAVE_FLOATINGPOINT_H) |
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1358
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303 // Disable trapping on common exceptions. |
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401
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304 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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305 #endif |
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959
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306 #endif |
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401
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307 |
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1
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308 #ifdef NeXT |
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309 NeXT_init (); |
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310 #endif |
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444
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311 |
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312 octave_ieee_init (); |
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313 |
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314 ten_little_endians (); |
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1
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315 } |
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316 |
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767
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317 // Set terminal in raw mode. From less-177. |
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318 // |
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319 // Change terminal to "raw mode", or restore to "normal" mode. |
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320 // "Raw mode" means |
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321 // 1. An outstanding read will complete on receipt of a single keystroke. |
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322 // 2. Input is not echoed. |
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323 // 3. On output, \n is mapped to \r\n. |
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324 // 4. \t is NOT expanded into spaces. |
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325 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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326 // etc. are NOT disabled. |
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327 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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328 |
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529
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329 void |
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330 raw_mode (int on) |
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331 { |
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332 static int curr_on = 0; |
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333 |
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334 int tty_fd = STDIN_FILENO; |
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335 if (! isatty (tty_fd)) |
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336 { |
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337 if (interactive) |
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338 error ("stdin is not a tty!"); |
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339 return; |
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340 } |
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341 |
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342 if (on == curr_on) |
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343 return; |
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344 |
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345 #if defined (HAVE_TERMIOS_H) |
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346 { |
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347 struct termios s; |
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348 static struct termios save_term; |
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349 |
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350 if (on) |
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351 { |
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1358
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352 // Get terminal modes. |
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529
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353 |
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354 tcgetattr (tty_fd, &s); |
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355 |
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1358
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356 // Save modes and set certain variables dependent on modes. |
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529
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357 |
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358 save_term = s; |
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359 // ospeed = s.c_cflag & CBAUD; |
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360 // erase_char = s.c_cc[VERASE]; |
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361 // kill_char = s.c_cc[VKILL]; |
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362 |
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1358
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363 // Set the modes to the way we want them. |
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529
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364 |
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365 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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366 s.c_oflag |= (OPOST|ONLCR); |
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367 #if defined (OCRNL) |
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368 s.c_oflag &= ~(OCRNL); |
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369 #endif |
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370 #if defined (ONOCR) |
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371 s.c_oflag &= ~(ONOCR); |
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372 #endif |
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373 #if defined (ONLRET) |
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374 s.c_oflag &= ~(ONLRET); |
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375 #endif |
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376 s.c_cc[VMIN] = 1; |
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377 s.c_cc[VTIME] = 0; |
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378 } |
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379 else |
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380 { |
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1358
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381 // Restore saved modes. |
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382 |
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529
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383 s = save_term; |
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384 } |
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385 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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386 } |
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387 #elif defined (HAVE_TERMIO_H) |
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388 { |
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389 struct termio s; |
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390 static struct termio save_term; |
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391 |
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392 if (on) |
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393 { |
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1358
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394 // Get terminal modes. |
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529
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395 |
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396 ioctl (tty_fd, TCGETA, &s); |
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397 |
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1358
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398 // Save modes and set certain variables dependent on modes. |
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529
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399 |
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400 save_term = s; |
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401 // ospeed = s.c_cflag & CBAUD; |
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402 // erase_char = s.c_cc[VERASE]; |
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403 // kill_char = s.c_cc[VKILL]; |
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404 |
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1358
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405 // Set the modes to the way we want them. |
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529
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406 |
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407 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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408 s.c_oflag |= (OPOST|ONLCR); |
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409 #if defined (OCRNL) |
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410 s.c_oflag &= ~(OCRNL); |
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411 #endif |
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412 #if defined (ONOCR) |
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413 s.c_oflag &= ~(ONOCR); |
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414 #endif |
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415 #if defined (ONLRET) |
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416 s.c_oflag &= ~(ONLRET); |
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417 #endif |
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418 s.c_cc[VMIN] = 1; |
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419 s.c_cc[VTIME] = 0; |
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420 } |
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421 else |
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422 { |
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1358
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423 // Restore saved modes. |
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424 |
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529
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425 s = save_term; |
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426 } |
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427 ioctl (tty_fd, TCSETAW, &s); |
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428 } |
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429 #elif defined (HAVE_SGTTY_H) |
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430 { |
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431 struct sgttyb s; |
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432 static struct sgttyb save_term; |
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433 |
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434 if (on) |
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435 { |
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1358
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436 // Get terminal modes. |
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529
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437 |
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438 ioctl (tty_fd, TIOCGETP, &s); |
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439 |
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1358
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440 // Save modes and set certain variables dependent on modes. |
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529
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441 |
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442 save_term = s; |
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443 // ospeed = s.sg_ospeed; |
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444 // erase_char = s.sg_erase; |
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445 // kill_char = s.sg_kill; |
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446 |
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1358
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447 // Set the modes to the way we want them. |
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529
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448 |
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449 s.sg_flags |= CBREAK; |
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450 s.sg_flags &= ~(ECHO); |
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451 } |
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452 else |
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453 { |
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1358
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454 // Restore saved modes. |
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455 |
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529
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456 s = save_term; |
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457 } |
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458 ioctl (tty_fd, TIOCSETN, &s); |
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459 } |
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460 #else |
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461 LOSE! LOSE! |
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462 #endif |
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463 |
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464 curr_on = on; |
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465 } |
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466 |
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767
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467 // Read one character from the terminal. |
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468 |
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529
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469 int |
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470 kbhit (void) |
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471 { |
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472 int c; |
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473 raw_mode (1); |
|
|
474 c = cin.get (); |
|
|
475 raw_mode (0); |
|
|
476 return c; |
|
|
477 } |
|
|
478 |
|
1111
|
479 char * |
|
1126
|
480 octave_getcwd (char *buf, int len) |
|
1111
|
481 { |
|
1113
|
482 #if defined (__EMX__) |
|
1111
|
483 return _getcwd2 (buf, len); |
|
|
484 #else |
|
|
485 return getcwd (buf, len); |
|
|
486 #endif |
|
|
487 } |
|
|
488 |
|
|
489 int |
|
1128
|
490 octave_chdir (const char *path) |
|
1111
|
491 { |
|
1113
|
492 #if defined (__EMX__) |
|
1111
|
493 int retval = -1; |
|
|
494 |
|
|
495 if (strlen (path) == 2 && path[1] == ':') |
|
|
496 { |
|
|
497 char *upper_case_dir_name = strupr (path); |
|
|
498 _chdrive (upper_case_dir_name[0]); |
|
|
499 if (_getdrive () == upper_case_dir_name[0]) |
|
|
500 retval = _chdir2 ("/"); |
|
|
501 } |
|
|
502 else |
|
|
503 retval = _chdir2 (path); |
|
|
504 |
|
|
505 return retval; |
|
|
506 #else |
|
|
507 return chdir (path); |
|
|
508 #endif |
|
|
509 } |
|
|
510 |
|
1488
|
511 DEFUN ("clc", Fclc, Sclc, 00, |
|
529
|
512 "clc (): clear screen") |
|
|
513 { |
|
|
514 Octave_object retval; |
|
|
515 |
|
|
516 rl_beg_of_line (); |
|
|
517 rl_kill_line (1); |
|
|
518 |
|
|
519 #if ! defined (_GO32_) |
|
|
520 if (term_clrpag) |
|
|
521 tputs (term_clrpag, 1, _rl_output_character_function); |
|
|
522 else |
|
|
523 crlf (); |
|
|
524 #else |
|
|
525 crlf (); |
|
|
526 #endif |
|
|
527 |
|
|
528 fflush (rl_outstream); |
|
|
529 |
|
|
530 return retval; |
|
|
531 } |
|
|
532 |
|
549
|
533 DEFALIAS (home, clc); |
|
|
534 |
|
1488
|
535 DEFUN ("getenv", Fgetenv, Sgetenv, 10, |
|
529
|
536 "getenv (STRING): get environment variable values") |
|
|
537 { |
|
|
538 Octave_object retval; |
|
|
539 |
|
|
540 int nargin = args.length (); |
|
|
541 |
|
712
|
542 if (nargin == 1) |
|
529
|
543 { |
|
1363
|
544 const char *name = args(0).string_value (); |
|
636
|
545 |
|
|
546 if (! error_state) |
|
|
547 { |
|
|
548 char *value = getenv (name); |
|
|
549 if (value) |
|
|
550 retval = value; |
|
|
551 else |
|
|
552 retval = ""; |
|
|
553 } |
|
529
|
554 } |
|
|
555 else |
|
|
556 print_usage ("getenv"); |
|
|
557 |
|
|
558 return retval; |
|
|
559 } |
|
|
560 |
|
1488
|
561 DEFUN ("kbhit", Fkbhit, Skbhit, 00, |
|
529
|
562 "kbhit: get a single character from the terminal") |
|
|
563 { |
|
|
564 Octave_object retval; |
|
|
565 |
|
1358
|
566 // XXX FIXME XXX -- add timeout and default value args? |
|
529
|
567 |
|
|
568 if (interactive) |
|
|
569 { |
|
|
570 int c = kbhit (); |
|
|
571 char *s = new char [2]; |
|
|
572 s[0] = c; |
|
|
573 s[1] = '\0'; |
|
|
574 retval = s; |
|
|
575 } |
|
|
576 |
|
|
577 return retval; |
|
|
578 } |
|
|
579 |
|
1488
|
580 DEFUN ("pause", Fpause, Spause, 10, |
|
529
|
581 "pause (seconds): suspend program execution") |
|
|
582 { |
|
|
583 Octave_object retval; |
|
|
584 |
|
|
585 int nargin = args.length (); |
|
|
586 |
|
712
|
587 if (! (nargin == 0 || nargin == 1)) |
|
529
|
588 { |
|
|
589 print_usage ("pause"); |
|
|
590 return retval; |
|
|
591 } |
|
|
592 |
|
1579
|
593 if (nargin == 1) |
|
529
|
594 { |
|
1579
|
595 double dval = args(0).double_value (); |
|
636
|
596 |
|
1579
|
597 if (! error_state) |
|
|
598 { |
|
|
599 if (xisnan (dval)) |
|
|
600 warning ("pause: NaN is an invalid delay"); |
|
|
601 else |
|
|
602 { |
|
|
603 int delay = NINT (dval); |
|
|
604 if (delay > 0) |
|
|
605 sleep (delay); |
|
|
606 } |
|
529
|
607 } |
|
|
608 } |
|
1579
|
609 else |
|
|
610 { |
|
|
611 if (kbhit () == EOF) |
|
|
612 clean_up_and_exit (0); |
|
|
613 } |
|
529
|
614 |
|
|
615 return retval; |
|
|
616 } |
|
|
617 |
|
862
|
618 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
|
|
619 // point functions really work. |
|
|
620 |
|
1488
|
621 DEFUN ("isieee", Fisieee, Sisieee, 00, |
|
862
|
622 "isieee (): return 1 if host uses IEEE floating point") |
|
|
623 { |
|
1226
|
624 return (double) (native_float_format == OCTAVE_IEEE_LITTLE |
|
|
625 || native_float_format == OCTAVE_IEEE_BIG); |
|
862
|
626 } |
|
|
627 |
|
529
|
628 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
629 int |
|
|
630 gethostname (char *name, int namelen) |
|
|
631 { |
|
|
632 int i; |
|
|
633 struct utsname ut; |
|
|
634 |
|
|
635 --namelen; |
|
|
636 |
|
|
637 uname (&ut); |
|
|
638 i = strlen (ut.nodename) + 1; |
|
|
639 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
640 name[namelen] = '\0'; |
|
|
641 |
|
|
642 return 0; |
|
|
643 } |
|
|
644 #endif |
|
|
645 |
|
|
646 /* |
|
1
|
647 ;;; Local Variables: *** |
|
|
648 ;;; mode: C++ *** |
|
|
649 ;;; page-delimiter: "^/\\*" *** |
|
|
650 ;;; End: *** |
|
|
651 */ |
