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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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529
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41 #include <stddef.h> |
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42 #include <stdlib.h> |
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529
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43 #include <stdio.h> |
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44 |
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529
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45 #include "tree-const.h" |
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46 #include "octave.h" |
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47 #include "help.h" |
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529
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48 #include "input.h" |
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49 #include "utils.h" |
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50 #include "oct-obj.h" |
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51 #include "error.h" |
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444
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52 #include "sysdep.h" |
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529
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53 #include "defun.h" |
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54 |
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55 extern "C" |
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56 { |
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57 #include <readline/readline.h> |
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58 |
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59 extern char *term_clrpag; |
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60 extern void _rl_output_character_function (); |
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61 |
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62 #if defined (HAVE_TERMIOS_H) |
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63 #include <termios.h> |
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64 #elif defined (HAVE_TERMIO_H) |
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65 #include <termio.h> |
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66 #elif defined (HAVE_SGTTY_H) |
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67 #include <sgtty.h> |
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68 #else |
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69 LOSE! LOSE! |
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70 #endif |
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71 } |
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72 |
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73 #ifndef STDIN_FILENO |
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74 #define STDIN_FILENO 1 |
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75 #endif |
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444
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76 |
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77 // Octave's idea of infinity. |
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78 double octave_Inf; |
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79 |
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80 // Octave's idea of not a number. |
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81 double octave_NaN; |
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82 |
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401
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83 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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84 #include <floatingpoint.h> |
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85 #endif |
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86 |
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87 #ifdef NeXT |
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88 extern "C" |
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89 { |
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90 typedef void (*_cplus_fcn_int) (int); |
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91 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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92 } |
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93 |
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94 static void |
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95 malloc_handler (int code) |
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96 { |
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97 if (code == 5) |
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98 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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99 else |
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100 { |
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101 panic ("probably irrecoverable malloc error: code %d", code); |
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102 } |
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103 } |
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104 |
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105 static void |
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106 NeXT_init (void) |
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107 { |
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108 malloc_error (malloc_handler); |
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109 } |
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110 #endif |
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111 |
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444
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112 static void |
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113 octave_ieee_init (void) |
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114 { |
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115 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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116 |
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117 // Some version of gcc on some old version of Linux used to crash when |
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118 // trying to make Inf and NaN. |
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119 |
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120 #if defined (HAVE_INFINITY) |
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121 octave_Inf = (double) infinity (); |
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122 #else |
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123 #ifdef linux |
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124 octave_Inf = HUGE_VAL; |
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125 #else |
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126 #ifdef __alpha__ |
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127 extern unsigned int DINFINITY[2]; |
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128 octave_Inf = (*((double *) (DINFINITY))); |
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129 #else |
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130 double tmp = 1e+10; |
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131 octave_Inf = tmp; |
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132 for (;;) |
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133 { |
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134 octave_Inf *= 1e+10; |
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135 if (octave_Inf == tmp) |
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136 break; |
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137 tmp = octave_Inf; |
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138 } |
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139 #endif |
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140 #endif |
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529
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141 #endif |
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142 |
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444
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143 #if defined (HAVE_QUIET_NAN) |
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144 octave_NaN = (double) quiet_nan (); |
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444
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145 #else |
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146 #ifdef linux |
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147 octave_NaN = NAN; |
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148 #else |
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529
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149 #ifdef __alpha__ |
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150 extern unsigned int DQNAN[2]; |
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151 octave_NaN = (*((double *) (DQNAN))); |
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152 #else |
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153 octave_NaN = octave_Inf / octave_Inf; |
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154 #endif |
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155 #endif |
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529
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156 #endif |
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157 |
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158 #else |
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159 |
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160 // This is sort of cheesy, but what can we do, other than blowing it |
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161 // off completely, or writing an entire IEEE emulation package? |
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162 |
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163 octave_Inf = DBL_MAX; |
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164 octave_NaN = DBL_MAX; |
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165 |
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166 #endif |
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167 } |
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168 |
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169 #if defined (EXCEPTION_IN_MATH) |
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170 extern "C" |
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171 { |
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172 int |
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173 matherr (struct exception *x) |
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174 { |
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175 // Possibly print our own message someday. Should probably be |
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176 // user-switchable. |
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177 |
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178 switch (x->type) |
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179 { |
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180 case DOMAIN: |
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181 case SING: |
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182 case OVERFLOW: |
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183 case UNDERFLOW: |
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184 case TLOSS: |
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185 case PLOSS: |
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186 default: |
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187 break; |
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188 } |
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189 |
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190 // But don't print the system message. |
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191 |
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192 return 1; |
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193 } |
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194 } |
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195 #endif |
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196 |
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197 void |
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198 sysdep_init (void) |
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199 { |
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401
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200 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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201 // Disable trapping on common exceptions. |
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202 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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203 #endif |
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204 |
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205 #ifdef NeXT |
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206 NeXT_init (); |
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207 #endif |
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208 |
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209 octave_ieee_init (); |
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210 } |
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211 |
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212 // Set terminal in raw mode. From less-177. |
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213 // |
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214 // Change terminal to "raw mode", or restore to "normal" mode. |
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215 // "Raw mode" means |
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216 // 1. An outstanding read will complete on receipt of a single keystroke. |
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217 // 2. Input is not echoed. |
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218 // 3. On output, \n is mapped to \r\n. |
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219 // 4. \t is NOT expanded into spaces. |
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220 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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221 // etc. are NOT disabled. |
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222 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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223 |
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529
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224 void |
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225 raw_mode (int on) |
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226 { |
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227 static int curr_on = 0; |
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228 |
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229 int tty_fd = STDIN_FILENO; |
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230 if (! isatty (tty_fd)) |
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231 { |
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232 if (interactive) |
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233 error ("stdin is not a tty!"); |
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234 return; |
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235 } |
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236 |
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237 if (on == curr_on) |
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238 return; |
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239 |
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240 #if defined (HAVE_TERMIOS_H) |
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241 { |
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242 struct termios s; |
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243 static struct termios save_term; |
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244 |
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245 if (on) |
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246 { |
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247 // Get terminal modes. |
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248 |
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249 tcgetattr (tty_fd, &s); |
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250 |
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251 // Save modes and set certain variables dependent on modes. |
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252 |
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253 save_term = s; |
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254 // ospeed = s.c_cflag & CBAUD; |
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255 // erase_char = s.c_cc[VERASE]; |
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256 // kill_char = s.c_cc[VKILL]; |
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257 |
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258 // Set the modes to the way we want them. |
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259 |
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260 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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261 s.c_oflag |= (OPOST|ONLCR); |
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262 #if defined (OCRNL) |
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263 s.c_oflag &= ~(OCRNL); |
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264 #endif |
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265 #if defined (ONOCR) |
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266 s.c_oflag &= ~(ONOCR); |
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267 #endif |
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268 #if defined (ONLRET) |
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269 s.c_oflag &= ~(ONLRET); |
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270 #endif |
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271 s.c_cc[VMIN] = 1; |
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272 s.c_cc[VTIME] = 0; |
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273 } |
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274 else |
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275 { |
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276 // Restore saved modes. |
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277 s = save_term; |
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278 } |
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279 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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280 } |
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281 #elif defined (HAVE_TERMIO_H) |
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282 { |
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283 struct termio s; |
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284 static struct termio save_term; |
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285 |
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286 if (on) |
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287 { |
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288 // Get terminal modes. |
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289 |
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290 ioctl (tty_fd, TCGETA, &s); |
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291 |
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292 // Save modes and set certain variables dependent on modes. |
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293 |
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294 save_term = s; |
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295 // ospeed = s.c_cflag & CBAUD; |
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296 // erase_char = s.c_cc[VERASE]; |
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297 // kill_char = s.c_cc[VKILL]; |
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298 |
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299 // Set the modes to the way we want them. |
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300 |
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301 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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302 s.c_oflag |= (OPOST|ONLCR); |
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303 #if defined (OCRNL) |
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304 s.c_oflag &= ~(OCRNL); |
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305 #endif |
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306 #if defined (ONOCR) |
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307 s.c_oflag &= ~(ONOCR); |
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308 #endif |
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309 #if defined (ONLRET) |
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310 s.c_oflag &= ~(ONLRET); |
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311 #endif |
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312 s.c_cc[VMIN] = 1; |
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313 s.c_cc[VTIME] = 0; |
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314 } |
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315 else |
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316 { |
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317 // Restore saved modes. |
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318 s = save_term; |
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319 } |
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320 ioctl (tty_fd, TCSETAW, &s); |
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321 } |
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322 #elif defined (HAVE_SGTTY_H) |
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323 { |
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324 struct sgttyb s; |
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325 static struct sgttyb save_term; |
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326 |
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327 if (on) |
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328 { |
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329 // Get terminal modes. |
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330 |
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331 ioctl (tty_fd, TIOCGETP, &s); |
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332 |
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333 // Save modes and set certain variables dependent on modes. |
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334 |
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335 save_term = s; |
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336 // ospeed = s.sg_ospeed; |
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337 // erase_char = s.sg_erase; |
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338 // kill_char = s.sg_kill; |
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339 |
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340 // Set the modes to the way we want them. |
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341 |
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342 s.sg_flags |= CBREAK; |
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343 s.sg_flags &= ~(ECHO); |
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344 } |
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345 else |
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346 { |
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347 // Restore saved modes. |
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348 s = save_term; |
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349 } |
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350 ioctl (tty_fd, TIOCSETN, &s); |
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351 } |
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352 #else |
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353 LOSE! LOSE! |
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354 #endif |
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355 |
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356 curr_on = on; |
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357 } |
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358 |
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767
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359 // Read one character from the terminal. |
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360 |
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529
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361 int |
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362 kbhit (void) |
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363 { |
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364 int c; |
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365 raw_mode (1); |
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366 c = cin.get (); |
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367 raw_mode (0); |
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368 return c; |
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369 } |
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370 |
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712
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371 DEFUN ("clc", Fclc, Sclc, 0, 0, |
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372 "clc (): clear screen") |
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373 { |
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374 Octave_object retval; |
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375 |
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376 rl_beg_of_line (); |
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377 rl_kill_line (1); |
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378 |
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379 #if ! defined (_GO32_) |
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380 if (term_clrpag) |
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381 tputs (term_clrpag, 1, _rl_output_character_function); |
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382 else |
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383 crlf (); |
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384 #else |
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385 crlf (); |
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386 #endif |
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387 |
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388 fflush (rl_outstream); |
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389 |
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390 return retval; |
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391 } |
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392 |
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549
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393 DEFALIAS (home, clc); |
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394 |
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712
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395 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
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529
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396 "getenv (STRING): get environment variable values") |
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397 { |
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398 Octave_object retval; |
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399 |
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400 int nargin = args.length (); |
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401 |
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712
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402 if (nargin == 1) |
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529
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403 { |
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712
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404 char *name = args(0).string_value (); |
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636
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405 |
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406 if (! error_state) |
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407 { |
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408 char *value = getenv (name); |
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409 if (value) |
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410 retval = value; |
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411 else |
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412 retval = ""; |
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413 } |
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529
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414 } |
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415 else |
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416 print_usage ("getenv"); |
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417 |
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418 return retval; |
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419 } |
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420 |
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712
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421 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
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529
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422 "kbhit: get a single character from the terminal") |
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423 { |
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424 Octave_object retval; |
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425 |
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426 // XXX FIXME XXX -- add timeout and default value args? |
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427 |
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428 if (interactive) |
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429 { |
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430 int c = kbhit (); |
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431 char *s = new char [2]; |
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432 s[0] = c; |
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433 s[1] = '\0'; |
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434 retval = s; |
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435 } |
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436 |
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437 return retval; |
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438 } |
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439 |
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440 DEFUN ("pause", Fpause, Spause, 1, 1, |
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441 "pause (seconds): suspend program execution") |
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442 { |
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443 Octave_object retval; |
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444 |
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445 int nargin = args.length (); |
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446 |
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712
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447 if (! (nargin == 0 || nargin == 1)) |
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529
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448 { |
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449 print_usage ("pause"); |
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450 return retval; |
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451 } |
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452 |
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453 if (interactive) |
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454 { |
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455 switch (nargin) |
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456 { |
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712
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457 case 1: |
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529
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458 { |
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712
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459 double dval = args(0).double_value (); |
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636
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460 |
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461 if (! error_state) |
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529
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462 { |
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636
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463 int delay = NINT (dval); |
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464 if (delay > 0) |
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465 sleep (delay); |
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529
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466 } |
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467 } |
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636
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468 break; |
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469 |
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529
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470 default: |
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471 if (kbhit () == EOF) |
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472 clean_up_and_exit (0); |
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473 break; |
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474 } |
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475 } |
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476 |
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477 return retval; |
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478 } |
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479 |
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480 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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481 extern "C" |
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482 { |
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483 #include <sys/utsname.h> |
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484 int |
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485 gethostname (char *name, int namelen) |
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486 { |
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487 int i; |
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488 struct utsname ut; |
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489 |
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490 --namelen; |
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491 |
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492 uname (&ut); |
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493 i = strlen (ut.nodename) + 1; |
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494 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
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495 name[namelen] = '\0'; |
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496 |
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497 return 0; |
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498 } |
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499 } |
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500 #endif |
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501 |
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502 /* |
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1
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503 ;;; Local Variables: *** |
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504 ;;; mode: C++ *** |
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505 ;;; page-delimiter: "^/\\*" *** |
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506 ;;; End: *** |
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507 */ |
