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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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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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542
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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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143 |
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144 |
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145 #if defined (HAVE_QUIET_NAN) |
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146 octave_NaN = (double) quiet_nan (); |
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444
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147 #else |
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148 #ifdef linux |
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149 octave_NaN = NAN; |
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150 #else |
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529
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151 #ifdef __alpha__ |
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152 extern unsigned int DQNAN[2]; |
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153 octave_NaN = (*((double *) (DQNAN))); |
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154 #else |
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155 octave_NaN = octave_Inf / octave_Inf; |
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156 #endif |
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157 #endif |
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529
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158 #endif |
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159 |
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160 #else |
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161 |
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162 // This is sort of cheesy, but what can we do, other than blowing it |
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163 // off completely, or writing an entire IEEE emulation package? |
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164 |
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165 octave_Inf = DBL_MAX; |
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166 octave_NaN = DBL_MAX; |
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167 |
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168 #endif |
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169 } |
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170 |
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171 |
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172 #if defined (EXCEPTION_IN_MATH) |
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173 extern "C" |
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174 { |
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175 int |
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176 matherr (struct exception *x) |
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177 { |
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178 // Possibly print our own message someday. Should probably be |
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179 // user-switchable. |
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180 |
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181 switch (x->type) |
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182 { |
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183 case DOMAIN: |
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184 case SING: |
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185 case OVERFLOW: |
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186 case UNDERFLOW: |
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187 case TLOSS: |
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188 case PLOSS: |
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189 default: |
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190 break; |
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191 } |
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192 |
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193 // But don't print the system message. |
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194 |
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195 return 1; |
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196 } |
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197 } |
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198 #endif |
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199 |
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200 void |
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201 sysdep_init (void) |
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202 { |
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401
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203 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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204 // Disable trapping on common exceptions. |
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205 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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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 /* |
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529
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216 * Set terminal in raw mode. From less-177. |
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217 * |
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218 * Change terminal to "raw mode", or restore to "normal" mode. |
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219 * "Raw mode" means |
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220 * 1. An outstanding read will complete on receipt of a single keystroke. |
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221 * 2. Input is not echoed. |
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222 * 3. On output, \n is mapped to \r\n. |
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223 * 4. \t is NOT expanded into spaces. |
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224 * 5. Signal-causing characters such as ctrl-C (interrupt), |
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225 * etc. are NOT disabled. |
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226 * It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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227 */ |
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228 void |
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229 raw_mode (int on) |
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230 { |
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231 static int curr_on = 0; |
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232 |
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233 int tty_fd = STDIN_FILENO; |
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234 if (! isatty (tty_fd)) |
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235 { |
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236 if (interactive) |
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237 error ("stdin is not a tty!"); |
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238 return; |
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239 } |
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240 |
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241 if (on == curr_on) |
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242 return; |
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243 |
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244 #if defined (HAVE_TERMIOS_H) |
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245 { |
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246 struct termios s; |
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247 static struct termios save_term; |
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248 |
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249 if (on) |
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250 { |
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251 // Get terminal modes. |
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252 |
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253 tcgetattr (tty_fd, &s); |
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254 |
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255 // Save modes and set certain variables dependent on modes. |
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256 |
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257 save_term = s; |
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258 // ospeed = s.c_cflag & CBAUD; |
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259 // erase_char = s.c_cc[VERASE]; |
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260 // kill_char = s.c_cc[VKILL]; |
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261 |
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262 // Set the modes to the way we want them. |
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263 |
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264 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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265 s.c_oflag |= (OPOST|ONLCR); |
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266 #if defined (OCRNL) |
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267 s.c_oflag &= ~(OCRNL); |
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268 #endif |
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269 #if defined (ONOCR) |
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270 s.c_oflag &= ~(ONOCR); |
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271 #endif |
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272 #if defined (ONLRET) |
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273 s.c_oflag &= ~(ONLRET); |
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274 #endif |
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275 s.c_cc[VMIN] = 1; |
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276 s.c_cc[VTIME] = 0; |
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277 } |
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278 else |
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279 { |
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280 // Restore saved modes. |
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281 s = save_term; |
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282 } |
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283 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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284 } |
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285 #elif defined (HAVE_TERMIO_H) |
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286 { |
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287 struct termio s; |
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288 static struct termio save_term; |
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289 |
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290 if (on) |
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291 { |
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292 // Get terminal modes. |
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293 |
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294 ioctl (tty_fd, TCGETA, &s); |
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295 |
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296 // Save modes and set certain variables dependent on modes. |
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297 |
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298 save_term = s; |
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299 // ospeed = s.c_cflag & CBAUD; |
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300 // erase_char = s.c_cc[VERASE]; |
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301 // kill_char = s.c_cc[VKILL]; |
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302 |
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303 // Set the modes to the way we want them. |
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304 |
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305 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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306 s.c_oflag |= (OPOST|ONLCR); |
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307 #if defined (OCRNL) |
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308 s.c_oflag &= ~(OCRNL); |
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309 #endif |
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310 #if defined (ONOCR) |
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311 s.c_oflag &= ~(ONOCR); |
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312 #endif |
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313 #if defined (ONLRET) |
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314 s.c_oflag &= ~(ONLRET); |
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315 #endif |
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316 s.c_cc[VMIN] = 1; |
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317 s.c_cc[VTIME] = 0; |
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318 } |
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319 else |
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320 { |
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321 // Restore saved modes. |
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322 s = save_term; |
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323 } |
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324 ioctl (tty_fd, TCSETAW, &s); |
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325 } |
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326 #elif defined (HAVE_SGTTY_H) |
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327 { |
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328 struct sgttyb s; |
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329 static struct sgttyb save_term; |
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330 |
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331 if (on) |
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332 { |
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333 // Get terminal modes. |
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334 |
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335 ioctl (tty_fd, TIOCGETP, &s); |
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336 |
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337 // Save modes and set certain variables dependent on modes. |
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338 |
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339 save_term = s; |
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340 // ospeed = s.sg_ospeed; |
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341 // erase_char = s.sg_erase; |
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342 // kill_char = s.sg_kill; |
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343 |
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344 // Set the modes to the way we want them. |
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345 |
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346 s.sg_flags |= CBREAK; |
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347 s.sg_flags &= ~(ECHO); |
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348 } |
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349 else |
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350 { |
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351 // Restore saved modes. |
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352 s = save_term; |
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353 } |
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354 ioctl (tty_fd, TIOCSETN, &s); |
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355 } |
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356 #else |
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357 LOSE! LOSE! |
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358 #endif |
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359 |
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360 curr_on = on; |
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361 } |
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362 |
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363 /* |
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364 * Read one character from the terminal. |
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365 */ |
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366 int |
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367 kbhit (void) |
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368 { |
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369 int c; |
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370 raw_mode (1); |
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371 c = cin.get (); |
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372 raw_mode (0); |
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373 return c; |
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374 } |
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375 |
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712
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376 DEFUN ("clc", Fclc, Sclc, 0, 0, |
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377 "clc (): clear screen") |
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378 { |
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379 Octave_object retval; |
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380 |
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381 rl_beg_of_line (); |
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382 rl_kill_line (1); |
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383 |
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384 #if ! defined (_GO32_) |
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385 if (term_clrpag) |
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386 tputs (term_clrpag, 1, _rl_output_character_function); |
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387 else |
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388 crlf (); |
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389 #else |
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390 crlf (); |
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391 #endif |
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392 |
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393 fflush (rl_outstream); |
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394 |
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395 return retval; |
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396 } |
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397 |
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549
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398 DEFALIAS (home, clc); |
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399 |
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712
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400 DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, |
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529
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401 "getenv (STRING): get environment variable values") |
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402 { |
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403 Octave_object retval; |
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404 |
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405 int nargin = args.length (); |
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406 |
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712
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407 if (nargin == 1) |
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529
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408 { |
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712
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409 char *name = args(0).string_value (); |
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636
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410 |
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411 if (! error_state) |
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412 { |
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413 char *value = getenv (name); |
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414 if (value) |
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415 retval = value; |
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416 else |
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417 retval = ""; |
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418 } |
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529
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419 } |
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420 else |
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421 print_usage ("getenv"); |
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422 |
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423 return retval; |
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424 } |
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425 |
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712
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426 DEFUN ("kbhit", Fkbhit, Skbhit, 0, 1, |
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529
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427 "kbhit: get a single character from the terminal") |
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428 { |
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429 Octave_object retval; |
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430 |
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431 // XXX FIXME XXX -- add timeout and default value args? |
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432 |
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433 if (interactive) |
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434 { |
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435 int c = kbhit (); |
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436 char *s = new char [2]; |
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437 s[0] = c; |
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438 s[1] = '\0'; |
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439 retval = s; |
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440 } |
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441 |
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442 return retval; |
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443 } |
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444 |
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445 DEFUN ("pause", Fpause, Spause, 1, 1, |
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446 "pause (seconds): suspend program execution") |
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447 { |
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448 Octave_object retval; |
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449 |
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450 int nargin = args.length (); |
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451 |
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712
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452 if (! (nargin == 0 || nargin == 1)) |
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529
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453 { |
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454 print_usage ("pause"); |
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455 return retval; |
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456 } |
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457 |
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458 if (interactive) |
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459 { |
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460 switch (nargin) |
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461 { |
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712
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462 case 1: |
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529
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463 { |
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712
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464 double dval = args(0).double_value (); |
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636
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465 |
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466 if (! error_state) |
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529
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467 { |
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636
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468 int delay = NINT (dval); |
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469 if (delay > 0) |
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470 sleep (delay); |
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529
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471 } |
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472 } |
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636
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473 break; |
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474 |
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529
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475 default: |
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476 if (kbhit () == EOF) |
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477 clean_up_and_exit (0); |
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478 break; |
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479 } |
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480 } |
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481 |
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482 return retval; |
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483 } |
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484 |
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485 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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486 extern "C" |
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487 { |
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488 #include <sys/utsname.h> |
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489 int |
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490 gethostname (char *name, int namelen) |
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491 { |
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492 int i; |
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493 struct utsname ut; |
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494 |
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495 --namelen; |
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496 |
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497 uname (&ut); |
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498 i = strlen (ut.nodename) + 1; |
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499 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
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500 name[namelen] = '\0'; |
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501 |
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502 return 0; |
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503 } |
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504 } |
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505 #endif |
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506 |
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507 /* |
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1
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508 ;;; Local Variables: *** |
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509 ;;; mode: C++ *** |
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510 ;;; page-delimiter: "^/\\*" *** |
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511 ;;; End: *** |
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512 */ |
