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1
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1 // sysdep.cc -*- C++ -*- |
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2 /* |
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3 |
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1009
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4 Copyright (C) 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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661
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24 /* |
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25 |
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26 The function gethostname was adapted from a similar function from GNU |
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27 Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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28 Software Foundation, Inc. |
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29 |
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30 */ |
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31 |
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240
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32 #ifdef HAVE_CONFIG_H |
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1192
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33 #include <config.h> |
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34 #endif |
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35 |
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529
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36 #include <sys/types.h> |
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37 #ifdef HAVE_UNISTD_H |
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38 #include <unistd.h> |
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39 #endif |
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470
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40 #include <math.h> |
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844
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41 #include <float.h> |
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529
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42 #include <stddef.h> |
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43 #include <stdlib.h> |
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529
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44 #include <stdio.h> |
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45 |
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529
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46 #include "tree-const.h" |
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47 #include "octave.h" |
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542
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48 #include "help.h" |
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529
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49 #include "input.h" |
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50 #include "utils.h" |
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51 #include "oct-obj.h" |
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52 #include "error.h" |
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444
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53 #include "sysdep.h" |
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529
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54 #include "defun.h" |
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1226
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55 #include "f77-uscore.h" |
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529
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56 |
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57 extern "C" |
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58 { |
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59 #include <readline/readline.h> |
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60 |
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61 extern char *term_clrpag; |
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62 extern void _rl_output_character_function (); |
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63 |
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64 #if defined (HAVE_TERMIOS_H) |
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65 #include <termios.h> |
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66 #elif defined (HAVE_TERMIO_H) |
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67 #include <termio.h> |
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68 #elif defined (HAVE_SGTTY_H) |
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69 #include <sgtty.h> |
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70 #else |
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71 LOSE! LOSE! |
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72 #endif |
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73 |
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74 extern double F77_FCN (d1mach) (const int&); |
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529
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75 } |
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76 |
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77 #ifndef STDIN_FILENO |
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78 #define STDIN_FILENO 1 |
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79 #endif |
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444
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80 |
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81 // Octave's idea of infinity. |
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82 double octave_Inf; |
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83 |
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84 // Octave's idea of not a number. |
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85 double octave_NaN; |
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86 |
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1226
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87 // The floating point format on this system. |
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88 floating_point_format native_float_format = OCTAVE_UNKNOWN_FLT_FMT; |
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89 |
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959
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90 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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91 #include <floatingpoint.h> |
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92 #endif |
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93 |
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94 #ifdef NeXT |
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95 extern "C" |
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96 { |
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97 typedef void (*_cplus_fcn_int) (int); |
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98 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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99 } |
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100 |
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101 static void |
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102 malloc_handler (int code) |
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103 { |
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104 if (code == 5) |
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217
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105 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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106 else |
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107 { |
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108 panic ("probably irrecoverable malloc error: code %d", code); |
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109 } |
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110 } |
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111 |
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112 static void |
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113 NeXT_init (void) |
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114 { |
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115 malloc_error (malloc_handler); |
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116 } |
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117 #endif |
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118 |
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119 union equiv |
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120 { |
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121 double d; |
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122 int i[2]; |
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123 }; |
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124 |
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125 struct float_params |
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126 { |
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127 floating_point_format fp_fmt; |
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128 equiv fp_par[4]; |
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129 }; |
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130 |
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131 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ |
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132 do \ |
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133 { \ |
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134 fp.fp_fmt = (fmt); \ |
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135 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ |
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136 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ |
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137 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ |
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138 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ |
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139 } \ |
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140 while (0) |
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141 |
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142 static int |
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143 equiv_compare (const equiv *std, const equiv *v, int len) |
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144 { |
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145 int i; |
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146 for (i = 0; i < len; i++) |
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147 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) |
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148 return 0; |
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149 return 1; |
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150 } |
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151 |
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444
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152 static void |
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153 octave_ieee_init (void) |
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154 { |
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155 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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156 |
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157 // Some version of gcc on some old version of Linux used to crash when |
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158 // trying to make Inf and NaN. |
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159 |
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160 #if defined (HAVE_INFINITY) |
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470
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161 octave_Inf = (double) infinity (); |
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967
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162 #elif defined (linux) |
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444
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163 octave_Inf = HUGE_VAL; |
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967
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164 #elif defined (__alpha__) |
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529
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165 extern unsigned int DINFINITY[2]; |
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166 octave_Inf = (*((double *) (DINFINITY))); |
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167 #else |
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444
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168 double tmp = 1e+10; |
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169 octave_Inf = tmp; |
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170 for (;;) |
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171 { |
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172 octave_Inf *= 1e+10; |
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173 if (octave_Inf == tmp) |
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174 break; |
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175 tmp = octave_Inf; |
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176 } |
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177 #endif |
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529
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178 |
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444
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179 #if defined (HAVE_QUIET_NAN) |
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470
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180 octave_NaN = (double) quiet_nan (); |
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967
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181 #elif defined (linux) |
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444
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182 octave_NaN = NAN; |
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967
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183 #elif defined (__alpha__) |
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529
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184 extern unsigned int DQNAN[2]; |
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185 octave_NaN = (*((double *) (DQNAN))); |
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186 #else |
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444
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187 octave_NaN = octave_Inf / octave_Inf; |
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188 #endif |
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189 |
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190 #else |
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191 |
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192 // This is sort of cheesy, but what can we do, other than blowing it |
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193 // off completely, or writing an entire IEEE emulation package? |
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194 |
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195 octave_Inf = DBL_MAX; |
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196 octave_NaN = DBL_MAX; |
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197 |
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198 #endif |
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199 |
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200 float_params fp[5]; |
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201 |
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202 INIT_FLT_PAR (fp[0], OCTAVE_IEEE_BIG, |
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203 1048576, 0, |
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204 2146435071, -1, |
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205 1017118720, 0, |
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206 1018167296, 0); |
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207 |
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208 INIT_FLT_PAR (fp[1], OCTAVE_IEEE_LITTLE, |
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209 0, 1048576, |
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210 -1, 2146435071, |
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211 0, 1017118720, |
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212 0, 1018167296); |
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213 |
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214 INIT_FLT_PAR (fp[2], OCTAVE_VAX_D, |
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215 128, 0, |
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216 -32769, -1, |
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217 9344, 0, |
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218 9344, 0); |
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219 |
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220 INIT_FLT_PAR (fp[3], OCTAVE_VAX_G, |
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221 16, 0, |
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222 -32769, -1, |
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223 15552, 0, |
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224 15552, 0); |
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225 |
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226 INIT_FLT_PAR (fp[4], OCTAVE_UNKNOWN_FLT_FMT, |
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227 0, 0, |
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228 0, 0, |
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229 0, 0, |
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230 0, 0); |
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231 |
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232 equiv mach_fp_par[4]; |
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233 |
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234 mach_fp_par[0].d = F77_FCN (d1mach) (1); |
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235 mach_fp_par[1].d = F77_FCN (d1mach) (2); |
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236 mach_fp_par[2].d = F77_FCN (d1mach) (3); |
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237 mach_fp_par[3].d = F77_FCN (d1mach) (4); |
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238 |
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239 int i = 0; |
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240 do |
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241 { |
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242 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) |
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243 { |
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244 native_float_format = fp[i].fp_fmt; |
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245 break; |
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246 } |
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247 } |
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248 while (fp[++i].fp_fmt != OCTAVE_UNKNOWN_FLT_FMT); |
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249 |
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250 if (native_float_format == OCTAVE_UNKNOWN_FLT_FMT) |
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251 panic ("unrecognized floating point format!"); |
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444
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252 } |
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253 |
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505
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254 #if defined (EXCEPTION_IN_MATH) |
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255 extern "C" |
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256 { |
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257 int |
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258 matherr (struct exception *x) |
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259 { |
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260 // Possibly print our own message someday. Should probably be |
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261 // user-switchable. |
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262 |
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263 switch (x->type) |
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264 { |
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265 case DOMAIN: |
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266 case SING: |
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267 case OVERFLOW: |
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268 case UNDERFLOW: |
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269 case TLOSS: |
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270 case PLOSS: |
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271 default: |
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272 break; |
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273 } |
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274 |
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275 // But don't print the system message. |
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276 |
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277 return 1; |
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278 } |
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279 } |
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280 #endif |
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281 |
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282 void |
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283 sysdep_init (void) |
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284 { |
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959
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285 #if defined (__386BSD__) || defined (__FreeBSD__) |
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998
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286 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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287 // Disable trapping on common exceptions. |
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288 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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289 #endif |
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959
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290 #endif |
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401
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291 |
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1
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292 #ifdef NeXT |
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293 NeXT_init (); |
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294 #endif |
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444
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295 |
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296 octave_ieee_init (); |
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1
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297 } |
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298 |
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767
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299 // Set terminal in raw mode. From less-177. |
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300 // |
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301 // Change terminal to "raw mode", or restore to "normal" mode. |
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302 // "Raw mode" means |
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303 // 1. An outstanding read will complete on receipt of a single keystroke. |
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304 // 2. Input is not echoed. |
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305 // 3. On output, \n is mapped to \r\n. |
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306 // 4. \t is NOT expanded into spaces. |
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307 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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308 // etc. are NOT disabled. |
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309 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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310 |
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529
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311 void |
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312 raw_mode (int on) |
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313 { |
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314 static int curr_on = 0; |
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315 |
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316 int tty_fd = STDIN_FILENO; |
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317 if (! isatty (tty_fd)) |
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318 { |
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319 if (interactive) |
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320 error ("stdin is not a tty!"); |
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321 return; |
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322 } |
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323 |
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324 if (on == curr_on) |
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325 return; |
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326 |
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327 #if defined (HAVE_TERMIOS_H) |
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328 { |
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329 struct termios s; |
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330 static struct termios save_term; |
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331 |
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332 if (on) |
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333 { |
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334 // Get terminal modes. |
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335 |
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336 tcgetattr (tty_fd, &s); |
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337 |
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338 // Save modes and set certain variables dependent on modes. |
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339 |
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340 save_term = s; |
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341 // ospeed = s.c_cflag & CBAUD; |
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342 // erase_char = s.c_cc[VERASE]; |
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343 // kill_char = s.c_cc[VKILL]; |
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344 |
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345 // Set the modes to the way we want them. |
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346 |
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347 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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348 s.c_oflag |= (OPOST|ONLCR); |
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349 #if defined (OCRNL) |
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350 s.c_oflag &= ~(OCRNL); |
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351 #endif |
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352 #if defined (ONOCR) |
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353 s.c_oflag &= ~(ONOCR); |
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354 #endif |
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355 #if defined (ONLRET) |
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356 s.c_oflag &= ~(ONLRET); |
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357 #endif |
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358 s.c_cc[VMIN] = 1; |
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359 s.c_cc[VTIME] = 0; |
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360 } |
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361 else |
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362 { |
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363 // Restore saved modes. |
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364 s = save_term; |
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365 } |
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366 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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367 } |
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368 #elif defined (HAVE_TERMIO_H) |
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369 { |
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370 struct termio s; |
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371 static struct termio save_term; |
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372 |
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373 if (on) |
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374 { |
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375 // Get terminal modes. |
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376 |
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377 ioctl (tty_fd, TCGETA, &s); |
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378 |
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379 // Save modes and set certain variables dependent on modes. |
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380 |
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381 save_term = s; |
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382 // ospeed = s.c_cflag & CBAUD; |
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383 // erase_char = s.c_cc[VERASE]; |
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384 // kill_char = s.c_cc[VKILL]; |
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385 |
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386 // Set the modes to the way we want them. |
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387 |
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388 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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389 s.c_oflag |= (OPOST|ONLCR); |
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390 #if defined (OCRNL) |
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391 s.c_oflag &= ~(OCRNL); |
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392 #endif |
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393 #if defined (ONOCR) |
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394 s.c_oflag &= ~(ONOCR); |
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395 #endif |
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396 #if defined (ONLRET) |
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397 s.c_oflag &= ~(ONLRET); |
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398 #endif |
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399 s.c_cc[VMIN] = 1; |
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400 s.c_cc[VTIME] = 0; |
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401 } |
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402 else |
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403 { |
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404 // Restore saved modes. |
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405 s = save_term; |
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406 } |
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407 ioctl (tty_fd, TCSETAW, &s); |
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408 } |
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409 #elif defined (HAVE_SGTTY_H) |
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410 { |
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411 struct sgttyb s; |
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412 static struct sgttyb save_term; |
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413 |
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414 if (on) |
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415 { |
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416 // Get terminal modes. |
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417 |
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418 ioctl (tty_fd, TIOCGETP, &s); |
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419 |
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420 // Save modes and set certain variables dependent on modes. |
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421 |
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422 save_term = s; |
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423 // ospeed = s.sg_ospeed; |
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424 // erase_char = s.sg_erase; |
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425 // kill_char = s.sg_kill; |
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426 |
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427 // Set the modes to the way we want them. |
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428 |
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429 s.sg_flags |= CBREAK; |
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430 s.sg_flags &= ~(ECHO); |
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431 } |
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432 else |
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433 { |
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434 // Restore saved modes. |
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435 s = save_term; |
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436 } |
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437 ioctl (tty_fd, TIOCSETN, &s); |
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438 } |
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439 #else |
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440 LOSE! LOSE! |
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441 #endif |
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442 |
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443 curr_on = on; |
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444 } |
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445 |
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767
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446 // Read one character from the terminal. |
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447 |
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529
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448 int |
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449 kbhit (void) |
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450 { |
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451 int c; |
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452 raw_mode (1); |
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453 c = cin.get (); |
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454 raw_mode (0); |
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455 return c; |
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456 } |
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457 |
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1111
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458 char * |
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1126
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459 octave_getcwd (char *buf, int len) |
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1111
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460 { |
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1113
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461 #if defined (__EMX__) |
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1111
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462 return _getcwd2 (buf, len); |
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463 #else |
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464 return getcwd (buf, len); |
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465 #endif |
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466 } |
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467 |
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468 int |
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1128
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469 octave_chdir (const char *path) |
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1111
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470 { |
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1113
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471 #if defined (__EMX__) |
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1111
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472 int retval = -1; |
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473 |
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474 if (strlen (path) == 2 && path[1] == ':') |
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475 { |
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476 char *upper_case_dir_name = strupr (path); |
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477 _chdrive (upper_case_dir_name[0]); |
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478 if (_getdrive () == upper_case_dir_name[0]) |
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479 retval = _chdir2 ("/"); |
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480 } |
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481 else |
|
|
482 retval = _chdir2 (path); |
|
|
483 |
|
|
484 return retval; |
|
|
485 #else |
|
|
486 return chdir (path); |
|
|
487 #endif |
|
|
488 } |
|
|
489 |
|
712
|
490 DEFUN ("clc", Fclc, Sclc, 0, 0, |
|
529
|
491 "clc (): clear screen") |
|
|
492 { |
|
|
493 Octave_object retval; |
|
|
494 |
|
|
495 rl_beg_of_line (); |
|
|
496 rl_kill_line (1); |
|
|
497 |
|
|
498 #if ! defined (_GO32_) |
|
|
499 if (term_clrpag) |
|
|
500 tputs (term_clrpag, 1, _rl_output_character_function); |
|
|
501 else |
|
|
502 crlf (); |
|
|
503 #else |
|
|
504 crlf (); |
|
|
505 #endif |
|
|
506 |
|
|
507 fflush (rl_outstream); |
|
|
508 |
|
|
509 return retval; |
|
|
510 } |
|
|
511 |
|
549
|
512 DEFALIAS (home, clc); |
|
|
513 |
|
712
|
514 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
|
529
|
515 "getenv (STRING): get environment variable values") |
|
|
516 { |
|
|
517 Octave_object retval; |
|
|
518 |
|
|
519 int nargin = args.length (); |
|
|
520 |
|
712
|
521 if (nargin == 1) |
|
529
|
522 { |
|
712
|
523 char *name = args(0).string_value (); |
|
636
|
524 |
|
|
525 if (! error_state) |
|
|
526 { |
|
|
527 char *value = getenv (name); |
|
|
528 if (value) |
|
|
529 retval = value; |
|
|
530 else |
|
|
531 retval = ""; |
|
|
532 } |
|
529
|
533 } |
|
|
534 else |
|
|
535 print_usage ("getenv"); |
|
|
536 |
|
|
537 return retval; |
|
|
538 } |
|
|
539 |
|
712
|
540 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
|
529
|
541 "kbhit: get a single character from the terminal") |
|
|
542 { |
|
|
543 Octave_object retval; |
|
|
544 |
|
|
545 // XXX FIXME XXX -- add timeout and default value args? |
|
|
546 |
|
|
547 if (interactive) |
|
|
548 { |
|
|
549 int c = kbhit (); |
|
|
550 char *s = new char [2]; |
|
|
551 s[0] = c; |
|
|
552 s[1] = '\0'; |
|
|
553 retval = s; |
|
|
554 } |
|
|
555 |
|
|
556 return retval; |
|
|
557 } |
|
|
558 |
|
|
559 DEFUN ("pause", Fpause, Spause, 1, 1, |
|
|
560 "pause (seconds): suspend program execution") |
|
|
561 { |
|
|
562 Octave_object retval; |
|
|
563 |
|
|
564 int nargin = args.length (); |
|
|
565 |
|
712
|
566 if (! (nargin == 0 || nargin == 1)) |
|
529
|
567 { |
|
|
568 print_usage ("pause"); |
|
|
569 return retval; |
|
|
570 } |
|
|
571 |
|
|
572 if (interactive) |
|
|
573 { |
|
|
574 switch (nargin) |
|
|
575 { |
|
712
|
576 case 1: |
|
529
|
577 { |
|
712
|
578 double dval = args(0).double_value (); |
|
636
|
579 |
|
|
580 if (! error_state) |
|
529
|
581 { |
|
1086
|
582 if (xisnan (dval)) |
|
|
583 warning ("pause: NaN is an invalid delay"); |
|
|
584 else |
|
|
585 { |
|
|
586 int delay = NINT (dval); |
|
|
587 if (delay > 0) |
|
|
588 sleep (delay); |
|
|
589 } |
|
529
|
590 } |
|
|
591 } |
|
636
|
592 break; |
|
|
593 |
|
529
|
594 default: |
|
|
595 if (kbhit () == EOF) |
|
|
596 clean_up_and_exit (0); |
|
|
597 break; |
|
|
598 } |
|
|
599 } |
|
|
600 |
|
|
601 return retval; |
|
|
602 } |
|
|
603 |
|
862
|
604 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
|
|
605 // point functions really work. |
|
|
606 |
|
|
607 DEFUN ("isieee", Fisieee, Sisieee, 1, 1, |
|
|
608 "isieee (): return 1 if host uses IEEE floating point") |
|
|
609 { |
|
1226
|
610 return (double) (native_float_format == OCTAVE_IEEE_LITTLE |
|
|
611 || native_float_format == OCTAVE_IEEE_BIG); |
|
862
|
612 } |
|
|
613 |
|
529
|
614 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
|
|
615 extern "C" |
|
|
616 { |
|
|
617 #include <sys/utsname.h> |
|
|
618 int |
|
|
619 gethostname (char *name, int namelen) |
|
|
620 { |
|
|
621 int i; |
|
|
622 struct utsname ut; |
|
|
623 |
|
|
624 --namelen; |
|
|
625 |
|
|
626 uname (&ut); |
|
|
627 i = strlen (ut.nodename) + 1; |
|
|
628 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
629 name[namelen] = '\0'; |
|
|
630 |
|
|
631 return 0; |
|
|
632 } |
|
|
633 } |
|
|
634 #endif |
|
|
635 |
|
|
636 /* |
|
1
|
637 ;;; Local Variables: *** |
|
|
638 ;;; mode: C++ *** |
|
|
639 ;;; page-delimiter: "^/\\*" *** |
|
|
640 ;;; End: *** |
|
|
641 */ |
