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1
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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5307
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, 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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1192
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25 #include <config.h> |
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1
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26 #endif |
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27 |
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1346
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28 #include <cfloat> |
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3124
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29 #include <cmath> |
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1343
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30 #include <cstddef> |
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1346
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31 #include <cstdio> |
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1343
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32 #include <cstdlib> |
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33 #include <cstring> |
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34 |
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3503
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35 #include <iostream> |
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1728
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36 #include <string> |
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37 |
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1350
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38 #ifdef HAVE_UNISTD_H |
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2442
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39 #ifdef HAVE_SYS_TYPES_H |
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529
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40 #include <sys/types.h> |
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2442
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41 #endif |
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529
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42 #include <unistd.h> |
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43 #endif |
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1
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44 |
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1430
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45 #if defined (HAVE_TERMIOS_H) |
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46 #include <termios.h> |
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47 #elif defined (HAVE_TERMIO_H) |
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48 #include <termio.h> |
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49 #elif defined (HAVE_SGTTY_H) |
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50 #include <sgtty.h> |
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4067
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51 #endif |
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52 |
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53 #if defined (HAVE_CONIO_H) |
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54 #include <conio.h> |
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1430
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55 #endif |
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56 |
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3248
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57 #if defined (HAVE_SYS_IOCTL_H) |
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58 #include <sys/ioctl.h> |
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59 #endif |
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60 |
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1463
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61 #if defined (HAVE_FLOATINGPOINT_H) |
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62 #include <floatingpoint.h> |
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63 #endif |
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64 |
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2508
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65 #if defined (HAVE_IEEEFP_H) |
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66 #include <ieeefp.h> |
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67 #endif |
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68 |
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1463
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69 #if !defined (HAVE_GETHOSTNAME) && defined (HAVE_SYS_UTSNAME_H) |
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70 #include <sys/utsname.h> |
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71 #endif |
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72 |
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2926
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73 #include "cmd-edit.h" |
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74 #include "file-ops.h" |
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2893
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75 #include "lo-mappers.h" |
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2317
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76 #include "mach-info.h" |
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2926
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77 #include "oct-env.h" |
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5451
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78 #include "quit.h" |
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1769
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79 |
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1352
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80 #include "defun.h" |
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81 #include "error.h" |
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529
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82 #include "input.h" |
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1755
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83 #include "oct-obj.h" |
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2370
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84 #include "ov.h" |
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3234
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85 #include "pager.h" |
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5770
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86 #include "sighandlers.h" |
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1352
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87 #include "sysdep.h" |
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1755
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88 #include "toplev.h" |
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529
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89 #include "utils.h" |
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90 |
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91 #ifndef STDIN_FILENO |
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92 #define STDIN_FILENO 1 |
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93 #endif |
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444
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94 |
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2508
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95 #if defined (__386BSD__) || defined (__FreeBSD__) |
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96 static void |
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97 BSD_init (void) |
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98 { |
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99 #if defined (HAVE_FLOATINGPOINT_H) |
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100 // Disable trapping on common exceptions. |
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4164
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101 #ifndef FP_X_DNML |
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102 #define FP_X_DNML 0 |
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103 #endif |
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2508
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104 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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105 #endif |
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106 } |
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107 #endif |
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108 |
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6080
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109 static void |
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110 w32_set_octave_home (void) |
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111 { |
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112 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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113 int n = 1024; |
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114 |
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6086
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115 std::string bin_dir (n, '\0'); |
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116 |
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117 while (true) |
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118 { |
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119 int status = GetModuleFileName (0, &bin_dir[0], n); |
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120 |
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121 if (status < n) |
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122 { |
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123 bin_dir.resize (status); |
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124 break; |
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125 } |
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126 else |
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127 { |
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128 n *= 2; |
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129 bin_dir.resize (n); |
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130 } |
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131 } |
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132 |
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133 if (! bin_dir.empty ()) |
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134 { |
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135 size_t pos = bin_dir.rfind ("\\bin\\"); |
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136 |
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137 if (pos != NPOS) |
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138 octave_env::putenv ("OCTAVE_HOME", bin_dir.substr (0, pos)); |
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139 } |
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140 #endif |
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141 } |
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142 |
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5451
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143 void |
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144 w32_set_quiet_shutdown (void) |
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145 { |
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146 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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147 // Let the user close the console window or shutdown without the |
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148 // pesky dialog. |
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149 // |
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5775
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150 // FIXME -- should this be user configurable? |
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151 SetProcessShutdownParameters (0x280, SHUTDOWN_NORETRY); |
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152 #endif |
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153 } |
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154 |
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155 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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156 void |
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157 MINGW_signal_cleanup (void) |
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158 { |
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5455
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159 w32_set_quiet_shutdown (); |
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5451
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160 |
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5455
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161 w32_raise_final (); |
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5451
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162 } |
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163 #endif |
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164 |
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165 #if defined (__MINGW32__) |
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166 static void |
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167 MINGW_init (void) |
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168 { |
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6080
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169 w32_set_octave_home (); |
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170 |
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5451
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171 // Init mutex to protect setjmp/longjmp and get main thread context |
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172 w32_sigint_init (); |
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173 |
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174 w32_set_quiet_shutdown (); |
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175 } |
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176 #endif |
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177 |
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6080
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178 #if defined (_MSC_VER) |
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179 static void |
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180 MSVC_init (void) |
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181 { |
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182 w32_set_octave_home (); |
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183 } |
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184 #endif |
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185 |
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4091
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186 #if defined (__CYGWIN__) |
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187 |
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188 #include <limits.h> |
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189 #include <sys/cygwin.h> |
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190 |
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191 static void |
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192 CYGWIN_init (void) |
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193 { |
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4470
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194 // Make sure TMPDIR contains an absolute windows path. Use '/' |
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195 // rather than '\\' so that sh expansion won't mess file names. |
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196 |
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4091
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197 std::string tmpdir = octave_env::getenv ("TMPDIR"); |
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198 |
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199 if (tmpdir.empty ()) |
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4470
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200 tmpdir = "/tmp"; |
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201 |
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202 char buf [PATH_MAX]; |
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4091
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203 |
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4470
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204 if (cygwin32_conv_to_full_win32_path (tmpdir.c_str (), buf) < 0) |
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205 panic ("CYGWIN_init: unable to convert TMPDIR (= \"%s\") to Windows directory name", |
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206 tmpdir.c_str ()); |
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207 else |
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208 { |
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209 tmpdir = buf; |
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4091
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210 |
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4470
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211 for (size_t i = 0; i < tmpdir.length (); i++) |
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212 if (tmpdir[i] == '\\') |
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213 tmpdir[i] = '/'; |
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4091
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214 } |
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4470
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215 |
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216 octave_env::putenv ("TMPDIR", tmpdir); |
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4091
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217 } |
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218 #endif |
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219 |
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4284
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220 #if defined (__DECCXX) |
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221 |
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222 // These don't seem to be instantiated automatically... |
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223 |
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224 template std::istream& |
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225 std::operator >> (std::istream&, std::complex<double>&); |
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226 |
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227 template std::string& |
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228 std::string::append (const std::string&, size_t, size_t); |
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229 |
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230 #endif |
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231 |
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2610
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232 #if defined (NeXT) |
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1
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233 extern "C" |
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234 { |
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235 typedef void (*_cplus_fcn_int) (int); |
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236 extern void (*malloc_error (_cplus_fcn_int)) (int); |
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237 } |
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238 |
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239 static void |
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240 malloc_handler (int code) |
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241 { |
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242 if (code == 5) |
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217
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243 warning ("hopefully recoverable malloc error: freeing wild pointer"); |
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1
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244 else |
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2926
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245 panic ("probably irrecoverable malloc error: code %d", code); |
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1
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246 } |
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247 |
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248 static void |
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249 NeXT_init (void) |
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250 { |
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251 malloc_error (malloc_handler); |
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252 } |
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3333
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253 #endif |
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1
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254 |
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2546
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255 #if defined (__EMX__) |
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256 OS2_init (void) |
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257 { |
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258 _control87 ((EM_INVALID | EM_DENORMAL | EM_ZERODIVIDE | EM_OVERFLOW |
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259 | EM_UNDERFLOW | EM_INEXACT), MCW_EM); |
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260 } |
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261 #endif |
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262 |
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2508
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263 #if defined (SCO) |
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264 static void |
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265 SCO_init (void) |
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266 { |
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267 #if defined (HAVE_IEEEFP_H) |
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268 // Disable trapping on common exceptions. |
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269 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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270 #endif |
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271 } |
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272 #endif |
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273 |
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1
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274 void |
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275 sysdep_init (void) |
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276 { |
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959
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277 #if defined (__386BSD__) || defined (__FreeBSD__) |
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2508
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278 BSD_init (); |
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4091
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279 #elif defined (__CYGWIN__) |
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280 CYGWIN_init (); |
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5451
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281 #elif defined (__MINGW32__) |
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282 MINGW_init (); |
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6080
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283 #elif defined (_MSC_VER) |
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284 MSVC_init (); |
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2610
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285 #elif defined (NeXT) |
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1
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286 NeXT_init (); |
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2610
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287 #elif defined (__EMX__) |
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2546
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288 OS2_init (); |
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2508
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289 #elif defined (SCO) |
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290 SCO_init (); |
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1
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291 #endif |
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444
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292 |
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293 octave_ieee_init (); |
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1
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294 } |
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295 |
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5451
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296 void |
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297 sysdep_cleanup (void) |
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298 { |
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299 MINGW_SIGNAL_CLEANUP (); |
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300 } |
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301 |
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767
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302 // Set terminal in raw mode. From less-177. |
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303 // |
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304 // Change terminal to "raw mode", or restore to "normal" mode. |
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305 // "Raw mode" means |
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306 // 1. An outstanding read will complete on receipt of a single keystroke. |
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307 // 2. Input is not echoed. |
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308 // 3. On output, \n is mapped to \r\n. |
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309 // 4. \t is NOT expanded into spaces. |
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310 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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311 // etc. are NOT disabled. |
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312 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
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313 |
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529
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314 void |
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3657
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315 raw_mode (bool on, bool wait) |
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529
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316 { |
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3657
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317 static bool curr_on = false; |
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529
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318 |
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319 int tty_fd = STDIN_FILENO; |
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320 if (! isatty (tty_fd)) |
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321 { |
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322 if (interactive) |
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323 error ("stdin is not a tty!"); |
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324 return; |
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325 } |
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326 |
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327 if (on == curr_on) |
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328 return; |
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329 |
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330 #if defined (HAVE_TERMIOS_H) |
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331 { |
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332 struct termios s; |
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333 static struct termios save_term; |
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334 |
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335 if (on) |
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336 { |
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1358
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337 // Get terminal modes. |
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529
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338 |
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339 tcgetattr (tty_fd, &s); |
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340 |
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1358
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341 // Save modes and set certain variables dependent on modes. |
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529
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342 |
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343 save_term = s; |
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344 // ospeed = s.c_cflag & CBAUD; |
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345 // erase_char = s.c_cc[VERASE]; |
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346 // kill_char = s.c_cc[VKILL]; |
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347 |
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1358
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348 // Set the modes to the way we want them. |
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529
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349 |
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350 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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351 s.c_oflag |= (OPOST|ONLCR); |
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352 #if defined (OCRNL) |
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353 s.c_oflag &= ~(OCRNL); |
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354 #endif |
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355 #if defined (ONOCR) |
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356 s.c_oflag &= ~(ONOCR); |
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357 #endif |
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358 #if defined (ONLRET) |
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359 s.c_oflag &= ~(ONLRET); |
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360 #endif |
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3658
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361 s.c_cc[VMIN] = wait ? 1 : 0; |
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529
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362 s.c_cc[VTIME] = 0; |
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363 } |
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364 else |
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365 { |
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1358
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366 // Restore saved modes. |
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367 |
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529
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368 s = save_term; |
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369 } |
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3658
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370 |
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529
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371 tcsetattr (tty_fd, TCSAFLUSH, &s); |
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372 } |
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373 #elif defined (HAVE_TERMIO_H) |
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374 { |
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375 struct termio s; |
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376 static struct termio save_term; |
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377 |
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378 if (on) |
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379 { |
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1358
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380 // Get terminal modes. |
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529
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381 |
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382 ioctl (tty_fd, TCGETA, &s); |
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383 |
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1358
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384 // Save modes and set certain variables dependent on modes. |
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529
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385 |
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386 save_term = s; |
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387 // ospeed = s.c_cflag & CBAUD; |
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388 // erase_char = s.c_cc[VERASE]; |
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389 // kill_char = s.c_cc[VKILL]; |
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390 |
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1358
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391 // Set the modes to the way we want them. |
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529
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392 |
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393 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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394 s.c_oflag |= (OPOST|ONLCR); |
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395 #if defined (OCRNL) |
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396 s.c_oflag &= ~(OCRNL); |
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397 #endif |
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398 #if defined (ONOCR) |
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399 s.c_oflag &= ~(ONOCR); |
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400 #endif |
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401 #if defined (ONLRET) |
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402 s.c_oflag &= ~(ONLRET); |
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403 #endif |
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3658
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404 s.c_cc[VMIN] = wait ? 1 : 0; |
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529
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405 } |
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406 else |
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407 { |
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1358
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408 // Restore saved modes. |
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409 |
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529
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410 s = save_term; |
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411 } |
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3658
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412 |
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529
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413 ioctl (tty_fd, TCSETAW, &s); |
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414 } |
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415 #elif defined (HAVE_SGTTY_H) |
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416 { |
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417 struct sgttyb s; |
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418 static struct sgttyb save_term; |
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419 |
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420 if (on) |
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421 { |
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1358
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422 // Get terminal modes. |
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529
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423 |
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424 ioctl (tty_fd, TIOCGETP, &s); |
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425 |
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1358
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426 // Save modes and set certain variables dependent on modes. |
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529
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427 |
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428 save_term = s; |
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429 // ospeed = s.sg_ospeed; |
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430 // erase_char = s.sg_erase; |
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431 // kill_char = s.sg_kill; |
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432 |
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1358
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433 // Set the modes to the way we want them. |
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529
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434 |
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435 s.sg_flags |= CBREAK; |
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436 s.sg_flags &= ~(ECHO); |
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437 } |
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438 else |
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439 { |
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1358
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440 // Restore saved modes. |
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441 |
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529
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442 s = save_term; |
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443 } |
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3658
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444 |
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529
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445 ioctl (tty_fd, TIOCSETN, &s); |
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446 } |
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447 #else |
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4064
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448 warning ("no support for raw mode console I/O on this system"); |
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449 |
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450 // Make sure the current mode doesn't toggle. |
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451 on = curr_on; |
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529
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452 #endif |
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453 |
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454 curr_on = on; |
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455 } |
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456 |
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767
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457 // Read one character from the terminal. |
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458 |
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529
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459 int |
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4067
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460 octave_kbhit (bool wait) |
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529
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461 { |
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4067
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462 #ifdef HAVE__KBHIT |
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4081
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463 int c = (! wait && ! _kbhit ()) ? 0 : std::cin.get (); |
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4067
|
464 #else |
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3658
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465 raw_mode (true, wait); |
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466 |
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5770
|
467 // Get current handler. |
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|
468 octave_interrupt_handler saved_interrupt_handler |
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|
469 = octave_ignore_interrupts (); |
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470 |
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|
471 // Restore it, disabling system call restarts (if possible) so the |
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|
472 // read can be interrupted. |
|
|
473 |
|
|
474 octave_set_interrupt_handler (saved_interrupt_handler, false); |
|
|
475 |
|
3658
|
476 int c = std::cin.get (); |
|
5770
|
477 |
|
3658
|
478 if (std::cin.fail () || std::cin.eof ()) |
|
|
479 std::cin.clear (); |
|
|
480 |
|
5770
|
481 // Restore it, enabling system call restarts (if possible). |
|
|
482 octave_set_interrupt_handler (saved_interrupt_handler, true); |
|
|
483 |
|
3658
|
484 raw_mode (false, true); |
|
4067
|
485 #endif |
|
3658
|
486 |
|
529
|
487 return c; |
|
|
488 } |
|
|
489 |
|
1957
|
490 DEFUN (clc, , , |
|
3332
|
491 "-*- texinfo -*-\n\ |
|
|
492 @deftypefn {Built-in Function} {} clc ()\n\ |
|
|
493 @deftypefnx {Built-in Function} {} home ()\n\ |
|
|
494 Clear the terminal screen and move the cursor to the upper left corner.\n\ |
|
3333
|
495 @end deftypefn") |
|
529
|
496 { |
|
2926
|
497 command_editor::clear_screen (); |
|
529
|
498 |
|
2926
|
499 return octave_value_list (); |
|
529
|
500 } |
|
|
501 |
|
549
|
502 DEFALIAS (home, clc); |
|
|
503 |
|
1957
|
504 DEFUN (getenv, args, , |
|
3301
|
505 "-*- texinfo -*-\n\ |
|
|
506 @deftypefn {Built-in Function} {} getenv (@var{var})\n\ |
|
|
507 Return the value of the environment variable @var{var}. For example,\n\ |
|
|
508 \n\ |
|
|
509 @example\n\ |
|
|
510 getenv (\"PATH\")\n\ |
|
|
511 @end example\n\ |
|
|
512 \n\ |
|
|
513 @noindent\n\ |
|
|
514 returns a string containing the value of your path.\n\ |
|
|
515 @end deftypefn") |
|
529
|
516 { |
|
4233
|
517 octave_value retval; |
|
529
|
518 |
|
|
519 int nargin = args.length (); |
|
|
520 |
|
712
|
521 if (nargin == 1) |
|
529
|
522 { |
|
3523
|
523 std::string name = args(0).string_value (); |
|
636
|
524 |
|
|
525 if (! error_state) |
|
2926
|
526 retval = octave_env::getenv (name); |
|
529
|
527 } |
|
|
528 else |
|
5823
|
529 print_usage (); |
|
529
|
530 |
|
|
531 return retval; |
|
|
532 } |
|
|
533 |
|
1957
|
534 DEFUN (putenv, args, , |
|
3301
|
535 "-*- texinfo -*-\n\ |
|
|
536 @deftypefn {Built-in Function} {} putenv (@var{var}, @var{value})\n\ |
|
|
537 Set the value of the environment variable @var{var} to @var{value}.\n\ |
|
|
538 @end deftypefn") |
|
1706
|
539 { |
|
2086
|
540 octave_value_list retval; |
|
1706
|
541 |
|
|
542 int nargin = args.length (); |
|
|
543 |
|
|
544 if (nargin == 2) |
|
|
545 { |
|
3523
|
546 std::string var = args(0).string_value (); |
|
1706
|
547 |
|
|
548 if (! error_state) |
|
|
549 { |
|
3523
|
550 std::string val = args(1).string_value (); |
|
1706
|
551 |
|
|
552 if (! error_state) |
|
2926
|
553 octave_env::putenv (var, val); |
|
1706
|
554 else |
|
|
555 error ("putenv: second argument should be a string"); |
|
|
556 } |
|
|
557 else |
|
|
558 error ("putenv: first argument should be a string"); |
|
|
559 } |
|
|
560 else |
|
5823
|
561 print_usage (); |
|
1706
|
562 |
|
|
563 return retval; |
|
|
564 } |
|
|
565 |
|
5775
|
566 // FIXME -- perhaps kbhit should also be able to print a prompt? |
|
3372
|
567 |
|
3657
|
568 DEFUN (kbhit, args, , |
|
3372
|
569 "-*- texinfo -*-\n\ |
|
|
570 @deftypefn {Built-in Function} {} kbhit ()\n\ |
|
3657
|
571 Read a single keystroke from the keyboard. If called with one\n\ |
|
|
572 argument, don't wait for a keypress. For example,\n\ |
|
3372
|
573 \n\ |
|
|
574 @example\n\ |
|
|
575 x = kbhit ();\n\ |
|
|
576 @end example\n\ |
|
|
577 \n\ |
|
|
578 @noindent\n\ |
|
|
579 will set @var{x} to the next character typed at the keyboard as soon as\n\ |
|
|
580 it is typed.\n\ |
|
3657
|
581 \n\ |
|
|
582 @example\n\ |
|
|
583 x = kbhit (1);\n\ |
|
|
584 @end example\n\ |
|
|
585 \n\ |
|
|
586 @noindent\n\ |
|
|
587 identical to the above example, but don't wait for a keypress,\n\ |
|
|
588 returning the empty string if no key is available.\n\ |
|
3372
|
589 @end deftypefn") |
|
529
|
590 { |
|
4233
|
591 octave_value retval; |
|
529
|
592 |
|
5775
|
593 // FIXME -- add timeout and default value args? |
|
529
|
594 |
|
3676
|
595 if (interactive || forced_interactive) |
|
529
|
596 { |
|
4067
|
597 int c = octave_kbhit (args.length () == 0); |
|
3657
|
598 |
|
3658
|
599 if (c == -1) |
|
|
600 c = 0; |
|
3657
|
601 |
|
529
|
602 char *s = new char [2]; |
|
|
603 s[0] = c; |
|
|
604 s[1] = '\0'; |
|
|
605 retval = s; |
|
|
606 } |
|
|
607 |
|
|
608 return retval; |
|
|
609 } |
|
|
610 |
|
1957
|
611 DEFUN (pause, args, , |
|
3301
|
612 "-*- texinfo -*-\n\ |
|
|
613 @deftypefn {Built-in Function} {} pause (@var{seconds})\n\ |
|
|
614 Suspend the execution of the program. If invoked without any arguments,\n\ |
|
|
615 Octave waits until you type a character. With a numeric argument, it\n\ |
|
|
616 pauses for the given number of seconds. For example, the following\n\ |
|
|
617 statement prints a message and then waits 5 seconds before clearing the\n\ |
|
|
618 screen.\n\ |
|
|
619 \n\ |
|
|
620 @example\n\ |
|
|
621 @group\n\ |
|
|
622 fprintf (stderr, \"wait please...\n\");\n\ |
|
|
623 pause (5);\n\ |
|
|
624 clc;\n\ |
|
|
625 @end group\n\ |
|
|
626 @end example\n\ |
|
|
627 @end deftypefn") |
|
529
|
628 { |
|
2086
|
629 octave_value_list retval; |
|
529
|
630 |
|
|
631 int nargin = args.length (); |
|
|
632 |
|
712
|
633 if (! (nargin == 0 || nargin == 1)) |
|
529
|
634 { |
|
5823
|
635 print_usage (); |
|
529
|
636 return retval; |
|
|
637 } |
|
|
638 |
|
1579
|
639 if (nargin == 1) |
|
529
|
640 { |
|
1579
|
641 double dval = args(0).double_value (); |
|
636
|
642 |
|
1579
|
643 if (! error_state) |
|
|
644 { |
|
|
645 if (xisnan (dval)) |
|
|
646 warning ("pause: NaN is an invalid delay"); |
|
2630
|
647 else if (xisinf (dval)) |
|
3234
|
648 { |
|
|
649 flush_octave_stdout (); |
|
4067
|
650 octave_kbhit (); |
|
3234
|
651 } |
|
1579
|
652 else |
|
4086
|
653 octave_sleep (dval); |
|
529
|
654 } |
|
|
655 } |
|
1579
|
656 else |
|
3234
|
657 { |
|
|
658 flush_octave_stdout (); |
|
4067
|
659 octave_kbhit (); |
|
3234
|
660 } |
|
2630
|
661 |
|
|
662 return retval; |
|
|
663 } |
|
|
664 |
|
|
665 DEFUN (sleep, args, , |
|
3301
|
666 "-*- texinfo -*-\n\ |
|
|
667 @deftypefn {Built-in Function} {} sleep (@var{seconds})\n\ |
|
|
668 Suspend the execution of the program for the given number of seconds.\n\ |
|
|
669 @end deftypefn") |
|
2630
|
670 { |
|
|
671 octave_value_list retval; |
|
|
672 |
|
|
673 if (args.length () == 1) |
|
1579
|
674 { |
|
2630
|
675 double dval = args(0).double_value (); |
|
|
676 |
|
|
677 if (! error_state) |
|
|
678 { |
|
|
679 if (xisnan (dval)) |
|
|
680 warning ("sleep: NaN is an invalid delay"); |
|
|
681 else |
|
4086
|
682 octave_sleep (dval); |
|
2630
|
683 } |
|
1579
|
684 } |
|
2630
|
685 else |
|
5823
|
686 print_usage (); |
|
2630
|
687 |
|
|
688 return retval; |
|
|
689 } |
|
|
690 |
|
|
691 DEFUN (usleep, args, , |
|
3301
|
692 "-*- texinfo -*-\n\ |
|
|
693 @deftypefn {Built-in Function} {} usleep (@var{microseconds})\n\ |
|
|
694 Suspend the execution of the program for the given number of\n\ |
|
|
695 microseconds. On systems where it is not possible to sleep for periods\n\ |
|
|
696 of time less than one second, @code{usleep} will pause the execution for\n\ |
|
|
697 @code{round (@var{microseconds} / 1e6)} seconds.\n\ |
|
|
698 @end deftypefn") |
|
2630
|
699 { |
|
|
700 octave_value_list retval; |
|
|
701 |
|
|
702 if (args.length () == 1) |
|
|
703 { |
|
|
704 double dval = args(0).double_value (); |
|
|
705 |
|
|
706 if (! error_state) |
|
|
707 { |
|
|
708 if (xisnan (dval)) |
|
|
709 warning ("usleep: NaN is an invalid delay"); |
|
|
710 else |
|
|
711 { |
|
|
712 int delay = NINT (dval); |
|
2631
|
713 |
|
2630
|
714 if (delay > 0) |
|
3308
|
715 octave_usleep (delay); |
|
2630
|
716 } |
|
|
717 } |
|
|
718 } |
|
|
719 else |
|
5823
|
720 print_usage (); |
|
529
|
721 |
|
|
722 return retval; |
|
|
723 } |
|
|
724 |
|
5775
|
725 // FIXME -- maybe this should only return 1 if IEEE floating |
|
862
|
726 // point functions really work. |
|
|
727 |
|
1957
|
728 DEFUN (isieee, , , |
|
3301
|
729 "-*- texinfo -*-\n\ |
|
|
730 @deftypefn {Built-in Function} {} isieee ()\n\ |
|
|
731 Return 1 if your computer claims to conform to the IEEE standard for\n\ |
|
|
732 floating point calculations.\n\ |
|
|
733 @end deftypefn") |
|
862
|
734 { |
|
4600
|
735 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
|
2317
|
736 |
|
4574
|
737 return octave_value (flt_fmt == oct_mach_info::flt_fmt_ieee_little_endian |
|
|
738 || flt_fmt == oct_mach_info::flt_fmt_ieee_big_endian); |
|
862
|
739 } |
|
|
740 |
|
4600
|
741 DEFUN (native_float_format, , , |
|
|
742 "-*- texinfo -*-\n\ |
|
|
743 @deftypefn {Built-in Function} {} native_float_format ()\n\ |
|
|
744 Return the native floating point format as a string\n\ |
|
|
745 @end deftypefn") |
|
|
746 { |
|
|
747 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
|
|
748 |
|
|
749 return octave_value (oct_mach_info::float_format_as_string (flt_fmt)); |
|
|
750 } |
|
|
751 |
|
1957
|
752 DEFUN (tilde_expand, args, , |
|
3301
|
753 "-*- texinfo -*-\n\ |
|
|
754 @deftypefn {Built-in Function} {} tilde_expand (@var{string})\n\ |
|
|
755 Performs tilde expansion on @var{string}. If @var{string} begins with a\n\ |
|
|
756 tilde character, (@samp{~}), all of the characters preceding the first\n\ |
|
|
757 slash (or all characters, if there is no slash) are treated as a\n\ |
|
|
758 possible user name, and the tilde and the following characters up to the\n\ |
|
|
759 slash are replaced by the home directory of the named user. If the\n\ |
|
|
760 tilde is followed immediately by a slash, the tilde is replaced by the\n\ |
|
|
761 home directory of the user running Octave. For example,\n\ |
|
|
762 \n\ |
|
|
763 @example\n\ |
|
|
764 @group\n\ |
|
|
765 tilde_expand (\"~joeuser/bin\")\n\ |
|
|
766 @result{} \"/home/joeuser/bin\"\n\ |
|
|
767 tilde_expand (\"~/bin\")\n\ |
|
|
768 @result{} \"/home/jwe/bin\"\n\ |
|
|
769 @end group\n\ |
|
|
770 @end example\n\ |
|
|
771 @end deftypefn") |
|
1750
|
772 { |
|
4233
|
773 octave_value retval; |
|
1750
|
774 |
|
|
775 int nargin = args.length (); |
|
|
776 |
|
|
777 if (nargin == 1) |
|
2926
|
778 retval = file_ops::tilde_expand (args(0).all_strings ()); |
|
1750
|
779 else |
|
5823
|
780 print_usage (); |
|
1750
|
781 |
|
|
782 return retval; |
|
|
783 } |
|
|
784 |
|
2552
|
785 #if defined (__EMX__) && defined (OS2) |
|
|
786 |
|
4208
|
787 DEFCMD (extproc, , , |
|
2926
|
788 "extproc: ignored by Octave") |
|
2552
|
789 { |
|
|
790 return octave_value_list (); |
|
|
791 } |
|
|
792 |
|
|
793 DEFALIAS (EXTPROC, extproc); |
|
|
794 |
|
|
795 #endif |
|
|
796 |
|
529
|
797 /* |
|
1
|
798 ;;; Local Variables: *** |
|
|
799 ;;; mode: C++ *** |
|
|
800 ;;; End: *** |
|
|
801 */ |
