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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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401
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84 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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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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444
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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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401
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201 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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202 // Disable trapping on common exceptions. |
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203 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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204 #endif |
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205 |
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206 #ifdef NeXT |
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207 NeXT_init (); |
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208 #endif |
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209 |
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210 octave_ieee_init (); |
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211 } |
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212 |
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213 // Set terminal in raw mode. From less-177. |
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214 // |
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215 // Change terminal to "raw mode", or restore to "normal" mode. |
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216 // "Raw mode" means |
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217 // 1. An outstanding read will complete on receipt of a single keystroke. |
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218 // 2. Input is not echoed. |
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219 // 3. On output, \n is mapped to \r\n. |
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220 // 4. \t is NOT expanded into spaces. |
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221 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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222 // etc. are NOT disabled. |
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223 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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224 |
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529
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225 void |
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226 raw_mode (int on) |
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227 { |
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228 static int curr_on = 0; |
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229 |
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230 int tty_fd = STDIN_FILENO; |
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231 if (! isatty (tty_fd)) |
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232 { |
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233 if (interactive) |
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234 error ("stdin is not a tty!"); |
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235 return; |
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236 } |
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237 |
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238 if (on == curr_on) |
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239 return; |
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240 |
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241 #if defined (HAVE_TERMIOS_H) |
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242 { |
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243 struct termios s; |
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244 static struct termios save_term; |
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245 |
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246 if (on) |
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247 { |
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248 // Get terminal modes. |
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249 |
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250 tcgetattr (tty_fd, &s); |
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251 |
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252 // Save modes and set certain variables dependent on modes. |
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253 |
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254 save_term = s; |
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255 // ospeed = s.c_cflag & CBAUD; |
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256 // erase_char = s.c_cc[VERASE]; |
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257 // kill_char = s.c_cc[VKILL]; |
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258 |
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259 // Set the modes to the way we want them. |
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260 |
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261 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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262 s.c_oflag |= (OPOST|ONLCR); |
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263 #if defined (OCRNL) |
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264 s.c_oflag &= ~(OCRNL); |
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265 #endif |
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266 #if defined (ONOCR) |
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267 s.c_oflag &= ~(ONOCR); |
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268 #endif |
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269 #if defined (ONLRET) |
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270 s.c_oflag &= ~(ONLRET); |
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271 #endif |
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272 s.c_cc[VMIN] = 1; |
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273 s.c_cc[VTIME] = 0; |
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274 } |
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275 else |
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276 { |
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277 // Restore saved modes. |
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278 s = save_term; |
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279 } |
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280 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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281 } |
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282 #elif defined (HAVE_TERMIO_H) |
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283 { |
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284 struct termio s; |
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285 static struct termio save_term; |
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286 |
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287 if (on) |
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288 { |
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289 // Get terminal modes. |
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290 |
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291 ioctl (tty_fd, TCGETA, &s); |
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292 |
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293 // Save modes and set certain variables dependent on modes. |
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294 |
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295 save_term = s; |
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296 // ospeed = s.c_cflag & CBAUD; |
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297 // erase_char = s.c_cc[VERASE]; |
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298 // kill_char = s.c_cc[VKILL]; |
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299 |
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300 // Set the modes to the way we want them. |
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301 |
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302 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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303 s.c_oflag |= (OPOST|ONLCR); |
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304 #if defined (OCRNL) |
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305 s.c_oflag &= ~(OCRNL); |
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306 #endif |
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307 #if defined (ONOCR) |
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308 s.c_oflag &= ~(ONOCR); |
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309 #endif |
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310 #if defined (ONLRET) |
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311 s.c_oflag &= ~(ONLRET); |
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312 #endif |
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313 s.c_cc[VMIN] = 1; |
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314 s.c_cc[VTIME] = 0; |
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315 } |
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316 else |
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317 { |
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318 // Restore saved modes. |
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319 s = save_term; |
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320 } |
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321 ioctl (tty_fd, TCSETAW, &s); |
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322 } |
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323 #elif defined (HAVE_SGTTY_H) |
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324 { |
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325 struct sgttyb s; |
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326 static struct sgttyb save_term; |
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327 |
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328 if (on) |
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329 { |
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330 // Get terminal modes. |
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331 |
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332 ioctl (tty_fd, TIOCGETP, &s); |
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333 |
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334 // Save modes and set certain variables dependent on modes. |
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335 |
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336 save_term = s; |
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337 // ospeed = s.sg_ospeed; |
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338 // erase_char = s.sg_erase; |
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339 // kill_char = s.sg_kill; |
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340 |
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341 // Set the modes to the way we want them. |
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342 |
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343 s.sg_flags |= CBREAK; |
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344 s.sg_flags &= ~(ECHO); |
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345 } |
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346 else |
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347 { |
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348 // Restore saved modes. |
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349 s = save_term; |
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350 } |
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351 ioctl (tty_fd, TIOCSETN, &s); |
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352 } |
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353 #else |
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354 LOSE! LOSE! |
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355 #endif |
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356 |
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357 curr_on = on; |
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358 } |
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359 |
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767
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360 // Read one character from the terminal. |
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361 |
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529
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362 int |
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363 kbhit (void) |
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364 { |
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365 int c; |
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366 raw_mode (1); |
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367 c = cin.get (); |
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368 raw_mode (0); |
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369 return c; |
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370 } |
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371 |
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712
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372 DEFUN ("clc", Fclc, Sclc, 0, 0, |
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373 "clc (): clear screen") |
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374 { |
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375 Octave_object retval; |
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376 |
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377 rl_beg_of_line (); |
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378 rl_kill_line (1); |
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379 |
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380 #if ! defined (_GO32_) |
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381 if (term_clrpag) |
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382 tputs (term_clrpag, 1, _rl_output_character_function); |
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383 else |
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384 crlf (); |
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385 #else |
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386 crlf (); |
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387 #endif |
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388 |
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389 fflush (rl_outstream); |
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390 |
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391 return retval; |
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392 } |
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393 |
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549
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394 DEFALIAS (home, clc); |
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395 |
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712
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396 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
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529
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397 "getenv (STRING): get environment variable values") |
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398 { |
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399 Octave_object retval; |
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400 |
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401 int nargin = args.length (); |
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402 |
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712
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403 if (nargin == 1) |
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529
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404 { |
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712
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405 char *name = args(0).string_value (); |
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636
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406 |
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407 if (! error_state) |
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408 { |
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409 char *value = getenv (name); |
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410 if (value) |
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411 retval = value; |
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412 else |
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413 retval = ""; |
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414 } |
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529
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415 } |
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416 else |
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417 print_usage ("getenv"); |
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418 |
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419 return retval; |
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420 } |
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421 |
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712
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422 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
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529
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423 "kbhit: get a single character from the terminal") |
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424 { |
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425 Octave_object retval; |
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426 |
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427 // XXX FIXME XXX -- add timeout and default value args? |
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428 |
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429 if (interactive) |
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430 { |
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431 int c = kbhit (); |
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432 char *s = new char [2]; |
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433 s[0] = c; |
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434 s[1] = '\0'; |
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435 retval = s; |
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436 } |
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437 |
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438 return retval; |
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439 } |
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440 |
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441 DEFUN ("pause", Fpause, Spause, 1, 1, |
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442 "pause (seconds): suspend program execution") |
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443 { |
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444 Octave_object retval; |
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445 |
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446 int nargin = args.length (); |
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447 |
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712
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448 if (! (nargin == 0 || nargin == 1)) |
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529
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449 { |
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450 print_usage ("pause"); |
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451 return retval; |
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452 } |
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453 |
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454 if (interactive) |
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455 { |
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456 switch (nargin) |
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457 { |
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712
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458 case 1: |
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529
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459 { |
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712
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460 double dval = args(0).double_value (); |
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636
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461 |
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462 if (! error_state) |
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529
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463 { |
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636
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464 int delay = NINT (dval); |
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465 if (delay > 0) |
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466 sleep (delay); |
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529
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467 } |
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468 } |
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636
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469 break; |
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470 |
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529
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471 default: |
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472 if (kbhit () == EOF) |
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473 clean_up_and_exit (0); |
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474 break; |
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475 } |
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476 } |
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477 |
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478 return retval; |
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479 } |
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480 |
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481 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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482 extern "C" |
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483 { |
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484 #include <sys/utsname.h> |
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485 int |
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486 gethostname (char *name, int namelen) |
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487 { |
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488 int i; |
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489 struct utsname ut; |
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490 |
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491 --namelen; |
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492 |
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493 uname (&ut); |
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494 i = strlen (ut.nodename) + 1; |
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495 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
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496 name[namelen] = '\0'; |
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497 |
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498 return 0; |
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499 } |
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500 } |
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501 #endif |
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502 |
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503 /* |
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1
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504 ;;; Local Variables: *** |
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505 ;;; mode: C++ *** |
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506 ;;; page-delimiter: "^/\\*" *** |
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507 ;;; End: *** |
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508 */ |
