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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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401
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4 Copyright (C) 1993, 1994 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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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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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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55 |
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56 extern "C" |
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57 { |
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58 #include <readline/readline.h> |
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59 |
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60 extern char *term_clrpag; |
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61 extern void _rl_output_character_function (); |
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62 |
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63 #if defined (HAVE_TERMIOS_H) |
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64 #include <termios.h> |
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65 #elif defined (HAVE_TERMIO_H) |
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66 #include <termio.h> |
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67 #elif defined (HAVE_SGTTY_H) |
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68 #include <sgtty.h> |
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69 #else |
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70 LOSE! LOSE! |
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71 #endif |
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72 } |
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73 |
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74 #ifndef STDIN_FILENO |
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75 #define STDIN_FILENO 1 |
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76 #endif |
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444
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77 |
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78 // Octave's idea of infinity. |
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79 double octave_Inf; |
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80 |
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81 // Octave's idea of not a number. |
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82 double octave_NaN; |
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83 |
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959
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84 #if defined (HAVE_FLOATINGPOINT_H) |
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401
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85 #include <floatingpoint.h> |
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86 #endif |
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87 |
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88 #ifdef NeXT |
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89 extern "C" |
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90 { |
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91 typedef void (*_cplus_fcn_int) (int); |
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92 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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93 } |
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94 |
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95 static void |
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96 malloc_handler (int code) |
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97 { |
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98 if (code == 5) |
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99 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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100 else |
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101 { |
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102 panic ("probably irrecoverable malloc error: code %d", code); |
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103 } |
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104 } |
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105 |
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106 static void |
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107 NeXT_init (void) |
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108 { |
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109 malloc_error (malloc_handler); |
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110 } |
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111 #endif |
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112 |
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444
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113 static void |
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114 octave_ieee_init (void) |
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115 { |
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116 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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117 |
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118 // Some version of gcc on some old version of Linux used to crash when |
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119 // trying to make Inf and NaN. |
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120 |
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121 #if defined (HAVE_INFINITY) |
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122 octave_Inf = (double) infinity (); |
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123 #else |
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124 #ifdef linux |
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125 octave_Inf = HUGE_VAL; |
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126 #else |
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127 #ifdef __alpha__ |
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128 extern unsigned int DINFINITY[2]; |
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129 octave_Inf = (*((double *) (DINFINITY))); |
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130 #else |
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131 double tmp = 1e+10; |
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132 octave_Inf = tmp; |
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133 for (;;) |
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134 { |
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135 octave_Inf *= 1e+10; |
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136 if (octave_Inf == tmp) |
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137 break; |
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138 tmp = octave_Inf; |
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139 } |
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140 #endif |
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141 #endif |
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529
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142 #endif |
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143 |
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144 #if defined (HAVE_QUIET_NAN) |
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145 octave_NaN = (double) quiet_nan (); |
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444
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146 #else |
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147 #ifdef linux |
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148 octave_NaN = NAN; |
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149 #else |
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529
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150 #ifdef __alpha__ |
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151 extern unsigned int DQNAN[2]; |
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152 octave_NaN = (*((double *) (DQNAN))); |
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153 #else |
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154 octave_NaN = octave_Inf / octave_Inf; |
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155 #endif |
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156 #endif |
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529
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157 #endif |
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158 |
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159 #else |
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160 |
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161 // This is sort of cheesy, but what can we do, other than blowing it |
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162 // off completely, or writing an entire IEEE emulation package? |
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163 |
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164 octave_Inf = DBL_MAX; |
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165 octave_NaN = DBL_MAX; |
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166 |
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167 #endif |
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168 } |
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169 |
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170 #if defined (EXCEPTION_IN_MATH) |
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171 extern "C" |
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172 { |
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173 int |
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174 matherr (struct exception *x) |
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175 { |
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176 // Possibly print our own message someday. Should probably be |
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177 // user-switchable. |
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178 |
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179 switch (x->type) |
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180 { |
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181 case DOMAIN: |
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182 case SING: |
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183 case OVERFLOW: |
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184 case UNDERFLOW: |
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185 case TLOSS: |
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186 case PLOSS: |
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187 default: |
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188 break; |
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189 } |
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190 |
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191 // But don't print the system message. |
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192 |
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193 return 1; |
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194 } |
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195 } |
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196 #endif |
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197 |
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198 void |
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199 sysdep_init (void) |
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200 { |
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201 #if defined (HAVE_FPSETMASK) |
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202 #if defined (__386BSD__) || defined (__FreeBSD__) |
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203 // Disable trapping on common exceptions. |
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204 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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205 #endif |
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959
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206 #endif |
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207 |
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208 #ifdef NeXT |
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209 NeXT_init (); |
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210 #endif |
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211 |
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212 octave_ieee_init (); |
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213 } |
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214 |
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215 // Set terminal in raw mode. From less-177. |
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216 // |
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217 // Change terminal to "raw mode", or restore to "normal" mode. |
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218 // "Raw mode" means |
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219 // 1. An outstanding read will complete on receipt of a single keystroke. |
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220 // 2. Input is not echoed. |
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221 // 3. On output, \n is mapped to \r\n. |
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222 // 4. \t is NOT expanded into spaces. |
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223 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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224 // etc. are NOT disabled. |
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225 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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226 |
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529
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227 void |
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228 raw_mode (int on) |
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229 { |
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230 static int curr_on = 0; |
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231 |
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232 int tty_fd = STDIN_FILENO; |
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233 if (! isatty (tty_fd)) |
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234 { |
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235 if (interactive) |
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236 error ("stdin is not a tty!"); |
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237 return; |
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238 } |
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239 |
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240 if (on == curr_on) |
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241 return; |
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242 |
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243 #if defined (HAVE_TERMIOS_H) |
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244 { |
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245 struct termios s; |
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246 static struct termios save_term; |
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247 |
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248 if (on) |
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249 { |
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250 // Get terminal modes. |
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251 |
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252 tcgetattr (tty_fd, &s); |
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253 |
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254 // Save modes and set certain variables dependent on modes. |
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255 |
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256 save_term = s; |
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257 // ospeed = s.c_cflag & CBAUD; |
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258 // erase_char = s.c_cc[VERASE]; |
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259 // kill_char = s.c_cc[VKILL]; |
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260 |
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261 // Set the modes to the way we want them. |
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262 |
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263 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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264 s.c_oflag |= (OPOST|ONLCR); |
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265 #if defined (OCRNL) |
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266 s.c_oflag &= ~(OCRNL); |
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267 #endif |
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268 #if defined (ONOCR) |
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269 s.c_oflag &= ~(ONOCR); |
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270 #endif |
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271 #if defined (ONLRET) |
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272 s.c_oflag &= ~(ONLRET); |
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273 #endif |
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274 s.c_cc[VMIN] = 1; |
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275 s.c_cc[VTIME] = 0; |
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276 } |
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277 else |
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278 { |
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279 // Restore saved modes. |
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280 s = save_term; |
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281 } |
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282 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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283 } |
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284 #elif defined (HAVE_TERMIO_H) |
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285 { |
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286 struct termio s; |
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287 static struct termio save_term; |
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288 |
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289 if (on) |
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290 { |
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291 // Get terminal modes. |
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292 |
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293 ioctl (tty_fd, TCGETA, &s); |
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294 |
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295 // Save modes and set certain variables dependent on modes. |
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296 |
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297 save_term = s; |
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298 // ospeed = s.c_cflag & CBAUD; |
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299 // erase_char = s.c_cc[VERASE]; |
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300 // kill_char = s.c_cc[VKILL]; |
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301 |
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302 // Set the modes to the way we want them. |
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303 |
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304 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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305 s.c_oflag |= (OPOST|ONLCR); |
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306 #if defined (OCRNL) |
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307 s.c_oflag &= ~(OCRNL); |
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308 #endif |
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309 #if defined (ONOCR) |
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310 s.c_oflag &= ~(ONOCR); |
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311 #endif |
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312 #if defined (ONLRET) |
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313 s.c_oflag &= ~(ONLRET); |
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314 #endif |
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315 s.c_cc[VMIN] = 1; |
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316 s.c_cc[VTIME] = 0; |
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317 } |
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318 else |
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319 { |
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320 // Restore saved modes. |
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321 s = save_term; |
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322 } |
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323 ioctl (tty_fd, TCSETAW, &s); |
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324 } |
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325 #elif defined (HAVE_SGTTY_H) |
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326 { |
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327 struct sgttyb s; |
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328 static struct sgttyb save_term; |
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329 |
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330 if (on) |
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331 { |
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332 // Get terminal modes. |
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333 |
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334 ioctl (tty_fd, TIOCGETP, &s); |
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335 |
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336 // Save modes and set certain variables dependent on modes. |
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337 |
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338 save_term = s; |
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339 // ospeed = s.sg_ospeed; |
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340 // erase_char = s.sg_erase; |
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341 // kill_char = s.sg_kill; |
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342 |
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343 // Set the modes to the way we want them. |
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344 |
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345 s.sg_flags |= CBREAK; |
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346 s.sg_flags &= ~(ECHO); |
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347 } |
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348 else |
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349 { |
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350 // Restore saved modes. |
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351 s = save_term; |
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352 } |
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353 ioctl (tty_fd, TIOCSETN, &s); |
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354 } |
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355 #else |
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356 LOSE! LOSE! |
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357 #endif |
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358 |
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359 curr_on = on; |
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360 } |
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361 |
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767
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362 // Read one character from the terminal. |
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363 |
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529
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364 int |
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365 kbhit (void) |
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366 { |
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367 int c; |
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368 raw_mode (1); |
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369 c = cin.get (); |
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370 raw_mode (0); |
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371 return c; |
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372 } |
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373 |
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712
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374 DEFUN ("clc", Fclc, Sclc, 0, 0, |
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529
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375 "clc (): clear screen") |
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376 { |
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377 Octave_object retval; |
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378 |
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379 rl_beg_of_line (); |
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380 rl_kill_line (1); |
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381 |
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382 #if ! defined (_GO32_) |
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383 if (term_clrpag) |
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384 tputs (term_clrpag, 1, _rl_output_character_function); |
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385 else |
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386 crlf (); |
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387 #else |
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388 crlf (); |
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389 #endif |
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390 |
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391 fflush (rl_outstream); |
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392 |
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393 return retval; |
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394 } |
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395 |
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549
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396 DEFALIAS (home, clc); |
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397 |
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712
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398 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
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529
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399 "getenv (STRING): get environment variable values") |
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400 { |
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401 Octave_object retval; |
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402 |
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403 int nargin = args.length (); |
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404 |
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712
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405 if (nargin == 1) |
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529
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406 { |
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712
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407 char *name = args(0).string_value (); |
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636
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408 |
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409 if (! error_state) |
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410 { |
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411 char *value = getenv (name); |
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412 if (value) |
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413 retval = value; |
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414 else |
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415 retval = ""; |
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416 } |
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529
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417 } |
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418 else |
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419 print_usage ("getenv"); |
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420 |
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421 return retval; |
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422 } |
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423 |
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712
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424 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
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529
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425 "kbhit: get a single character from the terminal") |
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426 { |
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427 Octave_object retval; |
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428 |
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429 // XXX FIXME XXX -- add timeout and default value args? |
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430 |
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431 if (interactive) |
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432 { |
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433 int c = kbhit (); |
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434 char *s = new char [2]; |
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435 s[0] = c; |
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436 s[1] = '\0'; |
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437 retval = s; |
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438 } |
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439 |
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440 return retval; |
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441 } |
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442 |
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443 DEFUN ("pause", Fpause, Spause, 1, 1, |
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444 "pause (seconds): suspend program execution") |
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445 { |
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446 Octave_object retval; |
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447 |
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448 int nargin = args.length (); |
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449 |
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712
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450 if (! (nargin == 0 || nargin == 1)) |
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529
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451 { |
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452 print_usage ("pause"); |
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453 return retval; |
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454 } |
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455 |
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456 if (interactive) |
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457 { |
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458 switch (nargin) |
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459 { |
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712
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460 case 1: |
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529
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461 { |
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712
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462 double dval = args(0).double_value (); |
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636
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463 |
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464 if (! error_state) |
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529
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465 { |
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636
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466 int delay = NINT (dval); |
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467 if (delay > 0) |
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468 sleep (delay); |
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529
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469 } |
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470 } |
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636
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471 break; |
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472 |
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529
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473 default: |
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474 if (kbhit () == EOF) |
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475 clean_up_and_exit (0); |
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476 break; |
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477 } |
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478 } |
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479 |
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480 return retval; |
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481 } |
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482 |
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862
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483 // XXX FIXME XXX -- maybe this should only return 1 if IEEE floating |
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484 // point functions really work. |
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485 |
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486 DEFUN ("isieee", Fisieee, Sisieee, 1, 1, |
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487 "isieee (): return 1 if host uses IEEE floating point") |
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488 { |
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489 Octave_object retval; |
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490 |
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491 #if defined (IEEE_BIG_ENDIAN) || defined (IEEE_LITTLE_ENDIAN) |
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492 retval = 1.0; |
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493 #else |
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494 retval = 0.0; |
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495 #endif |
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496 |
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497 return retval; |
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498 } |
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499 |
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529
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500 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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501 extern "C" |
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502 { |
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503 #include <sys/utsname.h> |
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504 int |
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505 gethostname (char *name, int namelen) |
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506 { |
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507 int i; |
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508 struct utsname ut; |
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509 |
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510 --namelen; |
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511 |
|
|
512 uname (&ut); |
|
|
513 i = strlen (ut.nodename) + 1; |
|
|
514 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
|
|
515 name[namelen] = '\0'; |
|
|
516 |
|
|
517 return 0; |
|
|
518 } |
|
|
519 } |
|
|
520 #endif |
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|
521 |
|
|
522 /* |
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1
|
523 ;;; Local Variables: *** |
|
|
524 ;;; mode: C++ *** |
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525 ;;; page-delimiter: "^/\\*" *** |
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|
526 ;;; End: *** |
|
|
527 */ |
