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