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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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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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529
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28 #include <sys/types.h> |
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29 #ifdef HAVE_UNISTD_H |
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30 #include <unistd.h> |
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31 #endif |
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32 #include <math.h> |
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529
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33 #include <stddef.h> |
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34 #include <stdlib.h> |
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529
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35 #include <stdio.h> |
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36 |
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529
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37 #include "tree-const.h" |
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38 #include "octave.h" |
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39 #include "help.h" |
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529
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40 #include "input.h" |
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41 #include "utils.h" |
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42 #include "oct-obj.h" |
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43 #include "error.h" |
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444
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44 #include "sysdep.h" |
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529
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45 #include "defun.h" |
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46 |
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47 extern "C" |
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48 { |
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49 #include <readline/readline.h> |
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50 |
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51 extern char *term_clrpag; |
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52 extern void _rl_output_character_function (); |
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53 |
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54 #if defined (HAVE_TERMIOS_H) |
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55 #include <termios.h> |
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56 #elif defined (HAVE_TERMIO_H) |
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57 #include <termio.h> |
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58 #elif defined (HAVE_SGTTY_H) |
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59 #include <sgtty.h> |
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60 #else |
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61 LOSE! LOSE! |
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62 #endif |
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63 |
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64 extern int ioctl (); |
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65 } |
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66 |
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67 #ifndef STDIN_FILENO |
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68 #define STDIN_FILENO 1 |
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69 #endif |
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444
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70 |
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71 // Octave's idea of infinity. |
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72 double octave_Inf; |
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73 |
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74 // Octave's idea of not a number. |
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75 double octave_NaN; |
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76 |
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77 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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78 #include <floatingpoint.h> |
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79 #endif |
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80 |
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81 #ifdef NeXT |
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82 extern "C" |
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83 { |
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84 typedef void (*_cplus_fcn_int) (int); |
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85 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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86 } |
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87 |
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88 static void |
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89 malloc_handler (int code) |
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90 { |
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91 if (code == 5) |
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92 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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93 else |
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94 { |
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95 panic ("probably irrecoverable malloc error: code %d", code); |
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96 } |
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97 } |
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98 |
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99 static void |
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100 NeXT_init (void) |
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101 { |
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102 malloc_error (malloc_handler); |
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103 } |
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104 #endif |
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105 |
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444
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106 static void |
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107 octave_ieee_init (void) |
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108 { |
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109 #if defined (HAVE_ISINF) || defined (HAVE_FINITE) |
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110 |
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111 // Some version of gcc on some old version of Linux used to crash when |
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112 // trying to make Inf and NaN. |
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113 |
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114 #if defined (HAVE_INFINITY) |
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115 octave_Inf = (double) infinity (); |
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116 #else |
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117 #ifdef linux |
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118 octave_Inf = HUGE_VAL; |
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119 #else |
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120 #ifdef __alpha__ |
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121 extern unsigned int DINFINITY[2]; |
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122 octave_Inf = (*((double *) (DINFINITY))); |
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123 #else |
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124 double tmp = 1e+10; |
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125 octave_Inf = tmp; |
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126 for (;;) |
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127 { |
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128 octave_Inf *= 1e+10; |
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129 if (octave_Inf == tmp) |
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130 break; |
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131 tmp = octave_Inf; |
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132 } |
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133 #endif |
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134 #endif |
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529
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135 #endif |
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136 |
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137 |
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138 |
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139 #if defined (HAVE_QUIET_NAN) |
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140 octave_NaN = (double) quiet_nan (); |
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444
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141 #else |
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142 #ifdef linux |
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143 octave_NaN = NAN; |
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144 #else |
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529
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145 #ifdef __alpha__ |
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146 extern unsigned int DQNAN[2]; |
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147 octave_NaN = (*((double *) (DQNAN))); |
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148 #else |
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149 octave_NaN = octave_Inf / octave_Inf; |
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150 #endif |
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151 #endif |
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529
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152 #endif |
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153 |
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154 #else |
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155 |
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156 // This is sort of cheesy, but what can we do, other than blowing it |
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157 // off completely, or writing an entire IEEE emulation package? |
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158 |
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159 octave_Inf = DBL_MAX; |
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160 octave_NaN = DBL_MAX; |
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161 |
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162 #endif |
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163 } |
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164 |
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165 |
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166 #if defined (EXCEPTION_IN_MATH) |
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167 extern "C" |
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168 { |
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169 int |
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170 matherr (struct exception *x) |
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171 { |
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172 // Possibly print our own message someday. Should probably be |
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173 // user-switchable. |
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174 |
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175 switch (x->type) |
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176 { |
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177 case DOMAIN: |
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178 case SING: |
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179 case OVERFLOW: |
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180 case UNDERFLOW: |
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181 case TLOSS: |
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182 case PLOSS: |
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183 default: |
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184 break; |
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185 } |
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186 |
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187 // But don't print the system message. |
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188 |
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189 return 1; |
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190 } |
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191 } |
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192 #endif |
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193 |
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194 void |
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195 sysdep_init (void) |
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196 { |
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197 #if defined (__386BSD__) && defined (HAVE_FLOATINGPOINT_H) |
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198 // Disable trapping on common exceptions. |
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199 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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200 #endif |
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201 |
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202 #ifdef NeXT |
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203 NeXT_init (); |
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204 #endif |
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205 |
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206 octave_ieee_init (); |
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207 } |
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208 |
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209 /* |
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529
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210 * Set terminal in raw mode. From less-177. |
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211 * |
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212 * Change terminal to "raw mode", or restore to "normal" mode. |
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213 * "Raw mode" means |
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214 * 1. An outstanding read will complete on receipt of a single keystroke. |
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215 * 2. Input is not echoed. |
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216 * 3. On output, \n is mapped to \r\n. |
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217 * 4. \t is NOT expanded into spaces. |
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218 * 5. Signal-causing characters such as ctrl-C (interrupt), |
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219 * etc. are NOT disabled. |
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220 * It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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221 */ |
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222 void |
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223 raw_mode (int on) |
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224 { |
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225 static int curr_on = 0; |
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226 |
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227 int tty_fd = STDIN_FILENO; |
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228 if (! isatty (tty_fd)) |
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229 { |
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230 if (interactive) |
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231 error ("stdin is not a tty!"); |
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232 return; |
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233 } |
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234 |
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235 if (on == curr_on) |
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236 return; |
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237 |
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238 #if defined (HAVE_TERMIOS_H) |
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239 { |
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240 struct termios s; |
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241 static struct termios save_term; |
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242 |
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243 if (on) |
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244 { |
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245 // Get terminal modes. |
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246 |
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247 tcgetattr (tty_fd, &s); |
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248 |
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249 // Save modes and set certain variables dependent on modes. |
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250 |
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251 save_term = s; |
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252 // ospeed = s.c_cflag & CBAUD; |
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253 // erase_char = s.c_cc[VERASE]; |
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254 // kill_char = s.c_cc[VKILL]; |
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255 |
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256 // Set the modes to the way we want them. |
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257 |
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258 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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259 s.c_oflag |= (OPOST|ONLCR); |
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260 #if defined (OCRNL) |
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261 s.c_oflag &= ~(OCRNL); |
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262 #endif |
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263 #if defined (ONOCR) |
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264 s.c_oflag &= ~(ONOCR); |
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265 #endif |
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266 #if defined (ONLRET) |
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267 s.c_oflag &= ~(ONLRET); |
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268 #endif |
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269 s.c_cc[VMIN] = 1; |
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270 s.c_cc[VTIME] = 0; |
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271 } |
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272 else |
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273 { |
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274 // Restore saved modes. |
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275 s = save_term; |
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276 } |
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277 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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278 } |
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279 #elif defined (HAVE_TERMIO_H) |
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280 { |
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281 struct termio s; |
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282 static struct termio save_term; |
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283 |
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284 if (on) |
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285 { |
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286 // Get terminal modes. |
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287 |
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288 ioctl (tty_fd, TCGETA, &s); |
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289 |
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290 // Save modes and set certain variables dependent on modes. |
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291 |
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292 save_term = s; |
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293 // ospeed = s.c_cflag & CBAUD; |
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294 // erase_char = s.c_cc[VERASE]; |
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295 // kill_char = s.c_cc[VKILL]; |
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296 |
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297 // Set the modes to the way we want them. |
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298 |
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299 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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300 s.c_oflag |= (OPOST|ONLCR); |
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301 #if defined (OCRNL) |
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302 s.c_oflag &= ~(OCRNL); |
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303 #endif |
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304 #if defined (ONOCR) |
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305 s.c_oflag &= ~(ONOCR); |
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306 #endif |
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307 #if defined (ONLRET) |
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308 s.c_oflag &= ~(ONLRET); |
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309 #endif |
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310 s.c_cc[VMIN] = 1; |
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311 s.c_cc[VTIME] = 0; |
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312 } |
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313 else |
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314 { |
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315 // Restore saved modes. |
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316 s = save_term; |
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317 } |
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318 ioctl (tty_fd, TCSETAW, &s); |
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319 } |
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320 #elif defined (HAVE_SGTTY_H) |
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321 { |
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322 struct sgttyb s; |
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323 static struct sgttyb save_term; |
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324 |
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325 if (on) |
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326 { |
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327 // Get terminal modes. |
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328 |
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329 ioctl (tty_fd, TIOCGETP, &s); |
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330 |
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331 // Save modes and set certain variables dependent on modes. |
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332 |
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333 save_term = s; |
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334 // ospeed = s.sg_ospeed; |
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335 // erase_char = s.sg_erase; |
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336 // kill_char = s.sg_kill; |
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337 |
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338 // Set the modes to the way we want them. |
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339 |
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340 s.sg_flags |= CBREAK; |
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341 s.sg_flags &= ~(ECHO); |
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342 } |
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343 else |
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344 { |
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345 // Restore saved modes. |
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346 s = save_term; |
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347 } |
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348 ioctl (tty_fd, TIOCSETN, &s); |
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349 } |
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350 #else |
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351 LOSE! LOSE! |
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352 #endif |
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353 |
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354 curr_on = on; |
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355 } |
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356 |
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357 /* |
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358 * Read one character from the terminal. |
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359 */ |
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360 int |
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361 kbhit (void) |
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362 { |
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363 int c; |
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364 raw_mode (1); |
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365 c = cin.get (); |
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366 raw_mode (0); |
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367 return c; |
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368 } |
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369 |
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370 DEFUN ("clc", Fclc, Sclc, 1, 0, |
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371 "clc (): clear screen") |
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372 { |
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373 Octave_object retval; |
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374 |
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375 rl_beg_of_line (); |
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376 rl_kill_line (1); |
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377 |
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378 #if ! defined (_GO32_) |
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379 if (term_clrpag) |
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380 tputs (term_clrpag, 1, _rl_output_character_function); |
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381 else |
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382 crlf (); |
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383 #else |
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384 crlf (); |
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385 #endif |
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386 |
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387 fflush (rl_outstream); |
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388 |
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389 return retval; |
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390 } |
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391 |
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392 DEFUN ("getenv", Fgetenv, Sgetenv, 2, 1, |
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393 "getenv (STRING): get environment variable values") |
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394 { |
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395 Octave_object retval; |
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396 |
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397 int nargin = args.length (); |
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398 |
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399 if (nargin == 2 && args(1).is_string_type ()) |
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400 { |
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401 char *value = getenv (args(1).string_value ()); |
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402 if (value) |
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403 retval = value; |
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404 else |
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405 retval = ""; |
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406 } |
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407 else |
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408 print_usage ("getenv"); |
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409 |
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410 return retval; |
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411 } |
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412 |
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545
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413 DEFALIAS (home, clc); |
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414 |
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415 DEFUN ("kbhit", Fkbhit, Skbhit, 1, 1, |
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416 "kbhit: get a single character from the terminal") |
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417 { |
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418 Octave_object retval; |
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419 |
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420 // XXX FIXME XXX -- add timeout and default value args? |
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421 |
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422 if (interactive) |
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423 { |
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424 int c = kbhit (); |
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425 char *s = new char [2]; |
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426 s[0] = c; |
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427 s[1] = '\0'; |
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428 retval = s; |
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429 } |
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430 |
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431 return retval; |
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432 } |
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433 |
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434 DEFUN ("pause", Fpause, Spause, 1, 1, |
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435 "pause (seconds): suspend program execution") |
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436 { |
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437 Octave_object retval; |
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438 |
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439 int nargin = args.length (); |
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440 |
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441 if (! (nargin == 1 || nargin == 2)) |
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442 { |
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443 print_usage ("pause"); |
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444 return retval; |
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445 } |
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446 |
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447 if (interactive) |
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448 { |
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449 switch (nargin) |
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450 { |
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451 case 2: |
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452 { |
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453 int delay = NINT (args(1).double_value ()); |
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454 if (delay > 0) |
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455 { |
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456 sleep (delay); |
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457 break; |
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458 } |
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459 } |
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460 default: |
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461 if (kbhit () == EOF) |
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462 clean_up_and_exit (0); |
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463 break; |
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464 } |
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465 } |
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466 |
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467 return retval; |
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468 } |
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469 |
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470 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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471 extern "C" |
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472 { |
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473 #include <sys/utsname.h> |
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474 int |
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475 gethostname (char *name, int namelen) |
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476 { |
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477 int i; |
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478 struct utsname ut; |
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479 |
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480 --namelen; |
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481 |
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482 uname (&ut); |
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483 i = strlen (ut.nodename) + 1; |
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484 strncpy (name, ut.nodename, i < namelen ? i : namelen); |
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485 name[namelen] = '\0'; |
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486 |
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487 return 0; |
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488 } |
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489 } |
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490 #endif |
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491 |
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492 /* |
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493 ;;; Local Variables: *** |
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494 ;;; mode: C++ *** |
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495 ;;; page-delimiter: "^/\\*" *** |
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496 ;;; End: *** |
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497 */ |
