Mercurial > hg > octave-lyh
annotate src/sysdep.cc @ 14383:07c55bceca23 stable
Fix guarded_eval() subfunction in fminunc (bug #35534).
* fminunc.m: Fix guarded_eval() subfunction in fminunc (bug #35534).
| author | Olaf Till <olaf.till@uni-jena.de> |
|---|---|
| date | Wed, 15 Feb 2012 14:44:37 +0100 |
| parents | ebcb0f83698f |
| children | eff4a5933e28 |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
|
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3 Copyright (C) 1993-2012 John W. Eaton |
| 1 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 1 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 1 | 20 |
| 21 */ | |
| 22 | |
| 240 | 23 #ifdef HAVE_CONFIG_H |
| 1192 | 24 #include <config.h> |
| 1 | 25 #endif |
| 26 | |
| 1346 | 27 #include <cfloat> |
| 1343 | 28 #include <cstddef> |
| 1346 | 29 #include <cstdio> |
| 1343 | 30 #include <cstdlib> |
| 31 #include <cstring> | |
| 32 | |
| 3503 | 33 #include <iostream> |
| 1728 | 34 #include <string> |
| 35 | |
| 529 | 36 #include <sys/types.h> |
| 37 #include <unistd.h> | |
| 1 | 38 |
| 1430 | 39 #if defined (HAVE_TERMIOS_H) |
| 40 #include <termios.h> | |
| 41 #elif defined (HAVE_TERMIO_H) | |
| 42 #include <termio.h> | |
| 43 #elif defined (HAVE_SGTTY_H) | |
| 44 #include <sgtty.h> | |
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45 #endif |
| 4067 | 46 |
| 47 #if defined (HAVE_CONIO_H) | |
| 48 #include <conio.h> | |
| 1430 | 49 #endif |
| 50 | |
| 3248 | 51 #if defined (HAVE_SYS_IOCTL_H) |
| 52 #include <sys/ioctl.h> | |
| 53 #endif | |
| 54 | |
| 1463 | 55 #if defined (HAVE_FLOATINGPOINT_H) |
| 56 #include <floatingpoint.h> | |
| 57 #endif | |
| 58 | |
| 2508 | 59 #if defined (HAVE_IEEEFP_H) |
| 60 #include <ieeefp.h> | |
| 61 #endif | |
| 62 | |
| 2926 | 63 #include "cmd-edit.h" |
| 64 #include "file-ops.h" | |
| 2893 | 65 #include "lo-mappers.h" |
| 7231 | 66 #include "lo-math.h" |
| 2317 | 67 #include "mach-info.h" |
| 2926 | 68 #include "oct-env.h" |
| 5451 | 69 #include "quit.h" |
| 1769 | 70 |
| 6208 | 71 #include "Cell.h" |
| 1352 | 72 #include "defun.h" |
| 73 #include "error.h" | |
| 529 | 74 #include "input.h" |
| 1755 | 75 #include "oct-obj.h" |
| 2370 | 76 #include "ov.h" |
| 3234 | 77 #include "pager.h" |
| 6419 | 78 #include "parse.h" |
| 5770 | 79 #include "sighandlers.h" |
| 1352 | 80 #include "sysdep.h" |
| 1755 | 81 #include "toplev.h" |
| 529 | 82 #include "utils.h" |
| 6598 | 83 #include "file-stat.h" |
| 529 | 84 |
| 85 #ifndef STDIN_FILENO | |
| 86 #define STDIN_FILENO 1 | |
| 87 #endif | |
| 444 | 88 |
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89 #if defined (__386BSD__) || defined (__FreeBSD__) || defined (__NetBSD__) |
| 2508 | 90 static void |
| 91 BSD_init (void) | |
| 92 { | |
| 93 #if defined (HAVE_FLOATINGPOINT_H) | |
| 94 // Disable trapping on common exceptions. | |
| 4164 | 95 #ifndef FP_X_DNML |
| 96 #define FP_X_DNML 0 | |
| 97 #endif | |
| 2508 | 98 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
| 99 #endif | |
| 100 } | |
| 101 #endif | |
| 102 | |
| 6956 | 103 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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104 |
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105 #define WIN32_LEAN_AND_MEAN |
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106 #include <tlhelp32.h> |
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107 |
| 6080 | 108 static void |
| 109 w32_set_octave_home (void) | |
| 110 { | |
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111 std::string bin_dir; |
| 6080 | 112 |
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113 HANDLE h = CreateToolhelp32Snapshot (TH32CS_SNAPMODULE |
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114 #ifdef TH32CS_SNAPMODULE32 |
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115 | TH32CS_SNAPMODULE32 |
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116 #endif |
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117 , 0); |
| 6080 | 118 |
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119 if (h != INVALID_HANDLE_VALUE) |
| 6080 | 120 { |
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121 MODULEENTRY32 mod_info; |
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122 |
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123 ZeroMemory (&mod_info, sizeof (mod_info)); |
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124 mod_info.dwSize = sizeof (mod_info); |
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125 |
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126 if (Module32First (h, &mod_info)) |
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127 { |
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128 do |
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129 { |
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130 std::string mod_name (mod_info.szModule); |
| 6080 | 131 |
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132 if (mod_name.find ("octinterp") != std::string::npos) |
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133 { |
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134 bin_dir = mod_info.szExePath; |
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135 if (bin_dir[bin_dir.length () - 1] != '\\') |
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136 bin_dir.append (1, '\\'); |
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137 break; |
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138 } |
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139 } |
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140 while (Module32Next (h, &mod_info)); |
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141 } |
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142 |
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143 CloseHandle (h); |
| 6080 | 144 } |
| 145 | |
| 146 if (! bin_dir.empty ()) | |
| 147 { | |
| 148 size_t pos = bin_dir.rfind ("\\bin\\"); | |
| 149 | |
| 8021 | 150 if (pos != std::string::npos) |
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151 octave_env::putenv ("OCTAVE_HOME", bin_dir.substr (0, pos)); |
| 6080 | 152 } |
| 153 } | |
| 154 | |
| 6960 | 155 void |
| 5451 | 156 w32_set_quiet_shutdown (void) |
| 157 { | |
| 158 // Let the user close the console window or shutdown without the | |
| 159 // pesky dialog. | |
| 160 // | |
| 5775 | 161 // FIXME -- should this be user configurable? |
| 5451 | 162 SetProcessShutdownParameters (0x280, SHUTDOWN_NORETRY); |
| 163 } | |
| 164 | |
| 6960 | 165 void |
| 5451 | 166 MINGW_signal_cleanup (void) |
| 167 { | |
| 5455 | 168 w32_set_quiet_shutdown (); |
| 5451 | 169 |
| 5455 | 170 w32_raise_final (); |
| 5451 | 171 } |
| 172 #endif | |
| 173 | |
| 174 #if defined (__MINGW32__) | |
| 175 static void | |
| 176 MINGW_init (void) | |
| 177 { | |
| 6080 | 178 w32_set_octave_home (); |
| 179 | |
| 5451 | 180 // Init mutex to protect setjmp/longjmp and get main thread context |
| 181 w32_sigint_init (); | |
| 182 | |
| 183 w32_set_quiet_shutdown (); | |
| 184 } | |
| 185 #endif | |
| 186 | |
| 6080 | 187 #if defined (_MSC_VER) |
| 188 static void | |
| 189 MSVC_init (void) | |
| 190 { | |
| 191 w32_set_octave_home (); | |
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192 |
| 6135 | 193 // Init mutex to protect setjmp/longjmp and get main thread context |
| 194 w32_sigint_init (); | |
| 195 | |
| 196 w32_set_quiet_shutdown (); | |
| 6080 | 197 } |
| 198 #endif | |
| 199 | |
| 4091 | 200 |
| 6598 | 201 // Return TRUE if FILE1 and FILE2 refer to the same (physical) file. |
| 202 | |
| 203 bool | |
| 204 same_file_internal (const std::string& file1, const std::string& file2) | |
| 205 { | |
| 206 #ifdef OCTAVE_USE_WINDOWS_API | |
| 207 | |
| 6691 | 208 bool retval = false; |
| 209 | |
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210 // Windows native code |
| 6598 | 211 // Reference: http://msdn2.microsoft.com/en-us/library/aa363788.aspx |
| 212 | |
| 6691 | 213 HANDLE hfile1 = CreateFile (file1.c_str (), 0, FILE_SHARE_READ, 0, |
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214 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 6691 | 215 |
| 216 if (hfile1 != INVALID_HANDLE_VALUE) | |
| 217 { | |
| 218 HANDLE hfile2 = CreateFile (file2.c_str (), 0, FILE_SHARE_READ, 0, | |
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219 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 6598 | 220 |
| 6691 | 221 if (hfile2 != INVALID_HANDLE_VALUE) |
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222 { |
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223 BY_HANDLE_FILE_INFORMATION hfi1; |
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224 BY_HANDLE_FILE_INFORMATION hfi2; |
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225 |
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226 if (GetFileInformationByHandle (hfile1, &hfi1) |
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227 && GetFileInformationByHandle (hfile2, &hfi2)) |
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228 |
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229 retval = (hfi1.dwVolumeSerialNumber == hfi2.dwVolumeSerialNumber |
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230 && hfi1.nFileIndexHigh == hfi2.nFileIndexHigh |
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231 && hfi1.nFileIndexLow == hfi2.nFileIndexLow); |
| 6598 | 232 |
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233 CloseHandle (hfile2); |
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234 } |
| 6691 | 235 |
| 6598 | 236 CloseHandle (hfile1); |
| 237 } | |
| 6691 | 238 |
| 239 return retval; | |
| 6598 | 240 |
| 241 #else | |
| 242 | |
| 243 // POSIX Code | |
| 244 | |
| 245 file_stat fs_file1 (file1); | |
| 246 file_stat fs_file2 (file2); | |
| 247 | |
| 248 return (fs_file1 && fs_file2 | |
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249 && fs_file1.ino () == fs_file2.ino () |
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250 && fs_file1.dev () == fs_file2.dev ()); |
| 6598 | 251 |
| 252 #endif | |
| 253 } | |
| 254 | |
| 1 | 255 void |
| 256 sysdep_init (void) | |
| 257 { | |
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258 #if defined (__386BSD__) || defined (__FreeBSD__) || defined(__NetBSD__) |
| 2508 | 259 BSD_init (); |
| 5451 | 260 #elif defined (__MINGW32__) |
| 261 MINGW_init (); | |
| 6080 | 262 #elif defined (_MSC_VER) |
| 263 MSVC_init (); | |
| 1 | 264 #endif |
| 265 } | |
| 266 | |
| 5451 | 267 void |
| 268 sysdep_cleanup (void) | |
| 269 { | |
| 270 MINGW_SIGNAL_CLEANUP (); | |
| 271 } | |
| 272 | |
| 767 | 273 // Set terminal in raw mode. From less-177. |
| 274 // | |
| 275 // Change terminal to "raw mode", or restore to "normal" mode. | |
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276 // "Raw mode" means |
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277 // 1. An outstanding read will complete on receipt of a single keystroke. |
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278 // 2. Input is not echoed. |
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279 // 3. On output, \n is mapped to \r\n. |
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280 // 4. \t is NOT expanded into spaces. |
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281 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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282 // etc. are NOT disabled. |
| 767 | 283 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
| 284 | |
| 529 | 285 void |
| 3657 | 286 raw_mode (bool on, bool wait) |
| 529 | 287 { |
| 3657 | 288 static bool curr_on = false; |
| 529 | 289 |
| 290 int tty_fd = STDIN_FILENO; | |
| 14160 | 291 if (! gnulib::isatty (tty_fd)) |
| 529 | 292 { |
| 293 if (interactive) | |
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294 error ("stdin is not a tty!"); |
| 529 | 295 return; |
| 296 } | |
| 297 | |
| 298 if (on == curr_on) | |
| 299 return; | |
| 300 | |
| 301 #if defined (HAVE_TERMIOS_H) | |
| 302 { | |
| 303 struct termios s; | |
| 304 static struct termios save_term; | |
| 305 | |
| 306 if (on) | |
| 307 { | |
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308 // Get terminal modes. |
| 529 | 309 |
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310 tcgetattr (tty_fd, &s); |
| 529 | 311 |
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312 // Save modes and set certain variables dependent on modes. |
| 529 | 313 |
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314 save_term = s; |
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315 // ospeed = s.c_cflag & CBAUD; |
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316 // erase_char = s.c_cc[VERASE]; |
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317 // kill_char = s.c_cc[VKILL]; |
| 529 | 318 |
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319 // Set the modes to the way we want them. |
| 529 | 320 |
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321 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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322 s.c_oflag |= (OPOST|ONLCR); |
| 529 | 323 #if defined (OCRNL) |
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324 s.c_oflag &= ~(OCRNL); |
| 529 | 325 #endif |
| 326 #if defined (ONOCR) | |
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327 s.c_oflag &= ~(ONOCR); |
| 529 | 328 #endif |
| 329 #if defined (ONLRET) | |
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330 s.c_oflag &= ~(ONLRET); |
| 529 | 331 #endif |
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332 s.c_cc[VMIN] = wait ? 1 : 0; |
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333 s.c_cc[VTIME] = 0; |
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334 } |
| 529 | 335 else |
| 336 { | |
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337 // Restore saved modes. |
| 1358 | 338 |
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339 s = save_term; |
| 529 | 340 } |
| 3658 | 341 |
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342 tcsetattr (tty_fd, wait ? TCSAFLUSH : TCSADRAIN, &s); |
| 529 | 343 } |
| 344 #elif defined (HAVE_TERMIO_H) | |
| 345 { | |
| 346 struct termio s; | |
| 347 static struct termio save_term; | |
| 348 | |
| 349 if (on) | |
| 350 { | |
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351 // Get terminal modes. |
| 529 | 352 |
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353 ioctl (tty_fd, TCGETA, &s); |
| 529 | 354 |
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355 // Save modes and set certain variables dependent on modes. |
| 529 | 356 |
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357 save_term = s; |
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358 // ospeed = s.c_cflag & CBAUD; |
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359 // erase_char = s.c_cc[VERASE]; |
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360 // kill_char = s.c_cc[VKILL]; |
| 529 | 361 |
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362 // Set the modes to the way we want them. |
| 529 | 363 |
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364 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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365 s.c_oflag |= (OPOST|ONLCR); |
| 529 | 366 #if defined (OCRNL) |
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367 s.c_oflag &= ~(OCRNL); |
| 529 | 368 #endif |
| 369 #if defined (ONOCR) | |
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370 s.c_oflag &= ~(ONOCR); |
| 529 | 371 #endif |
| 372 #if defined (ONLRET) | |
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373 s.c_oflag &= ~(ONLRET); |
| 529 | 374 #endif |
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375 s.c_cc[VMIN] = wait ? 1 : 0; |
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376 } |
| 529 | 377 else |
| 378 { | |
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379 // Restore saved modes. |
| 1358 | 380 |
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381 s = save_term; |
| 529 | 382 } |
| 3658 | 383 |
| 529 | 384 ioctl (tty_fd, TCSETAW, &s); |
| 385 } | |
| 386 #elif defined (HAVE_SGTTY_H) | |
| 387 { | |
| 388 struct sgttyb s; | |
| 389 static struct sgttyb save_term; | |
| 390 | |
| 391 if (on) | |
| 392 { | |
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393 // Get terminal modes. |
| 529 | 394 |
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395 ioctl (tty_fd, TIOCGETP, &s); |
| 529 | 396 |
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397 // Save modes and set certain variables dependent on modes. |
| 529 | 398 |
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399 save_term = s; |
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400 // ospeed = s.sg_ospeed; |
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401 // erase_char = s.sg_erase; |
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402 // kill_char = s.sg_kill; |
| 529 | 403 |
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404 // Set the modes to the way we want them. |
| 529 | 405 |
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406 s.sg_flags |= CBREAK; |
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407 s.sg_flags &= ~(ECHO); |
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408 } |
| 529 | 409 else |
| 410 { | |
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411 // Restore saved modes. |
| 1358 | 412 |
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413 s = save_term; |
| 529 | 414 } |
| 3658 | 415 |
| 529 | 416 ioctl (tty_fd, TIOCSETN, &s); |
| 417 } | |
| 418 #else | |
| 4064 | 419 warning ("no support for raw mode console I/O on this system"); |
| 420 | |
| 421 // Make sure the current mode doesn't toggle. | |
| 422 on = curr_on; | |
| 529 | 423 #endif |
| 424 | |
| 425 curr_on = on; | |
| 426 } | |
| 427 | |
| 6726 | 428 FILE * |
| 429 octave_popen (const char *command, const char *mode) | |
| 430 { | |
| 431 #if defined (__MINGW32__) || defined (_MSC_VER) | |
| 432 if (mode && mode[0] && ! mode[1]) | |
| 433 { | |
| 434 char tmode[3]; | |
| 435 tmode[0] = mode[0]; | |
| 436 tmode[1] = 'b'; | |
| 437 tmode[2] = 0; | |
| 438 | |
| 439 return _popen (command, tmode); | |
| 440 } | |
| 441 else | |
| 442 return _popen (command, mode); | |
| 443 #else | |
| 444 return popen (command, mode); | |
| 445 #endif | |
| 446 } | |
| 447 | |
| 448 int | |
| 449 octave_pclose (FILE *f) | |
| 450 { | |
| 451 #if defined (__MINGW32__) || defined (_MSC_VER) | |
| 452 return _pclose (f); | |
| 453 #else | |
| 454 return pclose (f); | |
| 455 #endif | |
| 456 } | |
| 457 | |
| 767 | 458 // Read one character from the terminal. |
| 459 | |
| 529 | 460 int |
| 4067 | 461 octave_kbhit (bool wait) |
| 529 | 462 { |
| 4067 | 463 #ifdef HAVE__KBHIT |
| 4081 | 464 int c = (! wait && ! _kbhit ()) ? 0 : std::cin.get (); |
| 4067 | 465 #else |
| 3658 | 466 raw_mode (true, wait); |
| 467 | |
| 5770 | 468 // Get current handler. |
| 469 octave_interrupt_handler saved_interrupt_handler | |
| 470 = octave_ignore_interrupts (); | |
| 471 | |
| 472 // Restore it, disabling system call restarts (if possible) so the | |
| 473 // read can be interrupted. | |
| 474 | |
| 475 octave_set_interrupt_handler (saved_interrupt_handler, false); | |
| 476 | |
| 3658 | 477 int c = std::cin.get (); |
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478 |
| 3658 | 479 if (std::cin.fail () || std::cin.eof ()) |
| 480 std::cin.clear (); | |
| 481 | |
| 5770 | 482 // Restore it, enabling system call restarts (if possible). |
| 483 octave_set_interrupt_handler (saved_interrupt_handler, true); | |
| 484 | |
| 3658 | 485 raw_mode (false, true); |
| 4067 | 486 #endif |
| 3658 | 487 |
| 529 | 488 return c; |
| 489 } | |
| 490 | |
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491 std::string |
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492 get_P_tmpdir (void) |
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493 { |
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494 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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495 |
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496 std::string retval; |
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497 |
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498 #if defined (P_tmpdir) |
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499 retval = P_tmpdir; |
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500 #endif |
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501 |
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502 // Apparently some versions of MinGW and MSVC either don't define |
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503 // P_tmpdir, or they define it to a single backslash, neither of which |
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504 // is particularly helpful. |
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505 |
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506 if (retval.empty () || retval == "\\") |
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507 { |
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508 retval = octave_env::getenv ("TEMP"); |
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509 |
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510 if (retval.empty ()) |
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511 retval = octave_env::getenv ("TMP"); |
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512 |
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513 if (retval.empty ()) |
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514 retval = "c:\\temp"; |
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515 } |
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516 |
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517 return retval; |
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518 |
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519 #elif defined (P_tmpdir) |
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520 |
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521 return P_tmpdir; |
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522 |
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523 #else |
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524 |
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525 return "/tmp"; |
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526 |
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527 #endif |
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528 } |
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529 |
| 1957 | 530 DEFUN (clc, , , |
| 3332 | 531 "-*- texinfo -*-\n\ |
| 10840 | 532 @deftypefn {Built-in Function} {} clc ()\n\ |
| 3332 | 533 @deftypefnx {Built-in Function} {} home ()\n\ |
| 534 Clear the terminal screen and move the cursor to the upper left corner.\n\ | |
| 3333 | 535 @end deftypefn") |
| 529 | 536 { |
| 2926 | 537 command_editor::clear_screen (); |
| 529 | 538 |
| 2926 | 539 return octave_value_list (); |
| 529 | 540 } |
| 541 | |
| 549 | 542 DEFALIAS (home, clc); |
| 543 | |
| 1957 | 544 DEFUN (getenv, args, , |
| 3301 | 545 "-*- texinfo -*-\n\ |
| 546 @deftypefn {Built-in Function} {} getenv (@var{var})\n\ | |
| 547 Return the value of the environment variable @var{var}. For example,\n\ | |
| 548 \n\ | |
| 549 @example\n\ | |
| 550 getenv (\"PATH\")\n\ | |
| 551 @end example\n\ | |
| 552 \n\ | |
| 553 @noindent\n\ | |
| 554 returns a string containing the value of your path.\n\ | |
| 555 @end deftypefn") | |
| 529 | 556 { |
| 4233 | 557 octave_value retval; |
| 529 | 558 |
| 559 int nargin = args.length (); | |
| 560 | |
| 712 | 561 if (nargin == 1) |
| 529 | 562 { |
| 3523 | 563 std::string name = args(0).string_value (); |
| 636 | 564 |
| 565 if (! error_state) | |
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566 retval = octave_env::getenv (name); |
| 529 | 567 } |
| 568 else | |
| 5823 | 569 print_usage (); |
| 529 | 570 |
| 571 return retval; | |
| 572 } | |
| 573 | |
| 1957 | 574 DEFUN (putenv, args, , |
| 3301 | 575 "-*- texinfo -*-\n\ |
| 10840 | 576 @deftypefn {Built-in Function} {} putenv (@var{var}, @var{value})\n\ |
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577 @deftypefnx {Built-in Function} {} setenv (@var{var}, @var{value})\n\ |
| 3301 | 578 Set the value of the environment variable @var{var} to @var{value}.\n\ |
| 579 @end deftypefn") | |
| 1706 | 580 { |
| 2086 | 581 octave_value_list retval; |
| 1706 | 582 |
| 583 int nargin = args.length (); | |
| 584 | |
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585 if (nargin == 2 || nargin == 1) |
| 1706 | 586 { |
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587 std::string var = args(0).string_value (); |
| 1706 | 588 |
| 589 if (! error_state) | |
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590 { |
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591 std::string val = (nargin == 2 |
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592 ? args(1).string_value () : std::string ()); |
| 1706 | 593 |
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594 if (! error_state) |
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595 octave_env::putenv (var, val); |
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596 else |
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597 error ("putenv: VALUE must be a string"); |
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598 } |
| 1706 | 599 else |
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600 error ("putenv: VAR must be a string"); |
| 1706 | 601 } |
| 602 else | |
| 5823 | 603 print_usage (); |
| 1706 | 604 |
| 605 return retval; | |
| 606 } | |
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607 |
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608 DEFALIAS (setenv, putenv); |
| 1706 | 609 |
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610 /* |
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611 %!assert (ischar (getenv ("OCTAVE_HOME"))); |
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612 %!test |
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613 %! setenv ("dummy_variable_that_cannot_matter", "foobar"); |
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614 %! assert (getenv ("dummy_variable_that_cannot_matter"), "foobar"); |
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615 */ |
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616 |
| 5775 | 617 // FIXME -- perhaps kbhit should also be able to print a prompt? |
| 3372 | 618 |
| 3657 | 619 DEFUN (kbhit, args, , |
| 3372 | 620 "-*- texinfo -*-\n\ |
| 621 @deftypefn {Built-in Function} {} kbhit ()\n\ | |
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622 Read a single keystroke from the keyboard. If called with one\n\ |
| 3657 | 623 argument, don't wait for a keypress. For example,\n\ |
| 3372 | 624 \n\ |
| 625 @example\n\ | |
| 626 x = kbhit ();\n\ | |
| 627 @end example\n\ | |
| 628 \n\ | |
| 629 @noindent\n\ | |
| 630 will set @var{x} to the next character typed at the keyboard as soon as\n\ | |
| 631 it is typed.\n\ | |
| 3657 | 632 \n\ |
| 633 @example\n\ | |
| 634 x = kbhit (1);\n\ | |
| 635 @end example\n\ | |
| 636 \n\ | |
| 637 @noindent\n\ | |
| 638 identical to the above example, but don't wait for a keypress,\n\ | |
| 639 returning the empty string if no key is available.\n\ | |
| 3372 | 640 @end deftypefn") |
| 529 | 641 { |
| 4233 | 642 octave_value retval; |
| 529 | 643 |
| 5775 | 644 // FIXME -- add timeout and default value args? |
| 529 | 645 |
| 3676 | 646 if (interactive || forced_interactive) |
| 529 | 647 { |
| 6423 | 648 feval ("drawnow"); |
| 649 | |
| 4067 | 650 int c = octave_kbhit (args.length () == 0); |
| 3657 | 651 |
| 3658 | 652 if (c == -1) |
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653 c = 0; |
| 3657 | 654 |
| 529 | 655 char *s = new char [2]; |
| 656 s[0] = c; | |
| 657 s[1] = '\0'; | |
| 658 retval = s; | |
| 659 } | |
| 660 | |
| 661 return retval; | |
| 662 } | |
| 663 | |
| 1957 | 664 DEFUN (pause, args, , |
| 3301 | 665 "-*- texinfo -*-\n\ |
| 666 @deftypefn {Built-in Function} {} pause (@var{seconds})\n\ | |
| 667 Suspend the execution of the program. If invoked without any arguments,\n\ | |
| 668 Octave waits until you type a character. With a numeric argument, it\n\ | |
| 669 pauses for the given number of seconds. For example, the following\n\ | |
| 670 statement prints a message and then waits 5 seconds before clearing the\n\ | |
| 671 screen.\n\ | |
| 672 \n\ | |
| 673 @example\n\ | |
| 674 @group\n\ | |
| 6848 | 675 fprintf (stderr, \"wait please...\\n\");\n\ |
| 3301 | 676 pause (5);\n\ |
| 677 clc;\n\ | |
| 678 @end group\n\ | |
| 679 @end example\n\ | |
| 680 @end deftypefn") | |
| 529 | 681 { |
| 2086 | 682 octave_value_list retval; |
| 529 | 683 |
| 684 int nargin = args.length (); | |
| 685 | |
| 712 | 686 if (! (nargin == 0 || nargin == 1)) |
| 529 | 687 { |
| 5823 | 688 print_usage (); |
| 529 | 689 return retval; |
| 690 } | |
| 691 | |
| 1579 | 692 if (nargin == 1) |
| 529 | 693 { |
| 1579 | 694 double dval = args(0).double_value (); |
| 636 | 695 |
| 1579 | 696 if (! error_state) |
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697 { |
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698 if (! xisnan (dval)) |
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699 { |
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700 feval ("drawnow"); |
| 6419 | 701 |
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702 if (xisinf (dval)) |
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703 { |
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704 flush_octave_stdout (); |
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705 octave_kbhit (); |
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706 } |
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707 else |
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708 octave_sleep (dval); |
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709 } |
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710 else |
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711 warning ("pause: NaN is an invalid delay"); |
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712 } |
| 529 | 713 } |
| 1579 | 714 else |
| 3234 | 715 { |
| 6423 | 716 feval ("drawnow"); |
| 3234 | 717 flush_octave_stdout (); |
| 4067 | 718 octave_kbhit (); |
| 3234 | 719 } |
| 2630 | 720 |
| 721 return retval; | |
| 722 } | |
| 723 | |
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724 /* |
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725 %!error (pause (1, 2)); |
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726 %!test |
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727 %! pause (1); |
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728 */ |
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729 |
| 2630 | 730 DEFUN (sleep, args, , |
| 3301 | 731 "-*- texinfo -*-\n\ |
| 732 @deftypefn {Built-in Function} {} sleep (@var{seconds})\n\ | |
| 733 Suspend the execution of the program for the given number of seconds.\n\ | |
| 734 @end deftypefn") | |
| 2630 | 735 { |
| 736 octave_value_list retval; | |
| 737 | |
| 738 if (args.length () == 1) | |
| 1579 | 739 { |
| 2630 | 740 double dval = args(0).double_value (); |
| 741 | |
| 742 if (! error_state) | |
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743 { |
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744 if (xisnan (dval)) |
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745 warning ("sleep: NaN is an invalid delay"); |
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746 else |
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747 { |
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748 feval ("drawnow"); |
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749 octave_sleep (dval); |
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750 } |
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751 } |
| 1579 | 752 } |
| 2630 | 753 else |
| 5823 | 754 print_usage (); |
| 2630 | 755 |
| 756 return retval; | |
| 757 } | |
| 758 | |
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759 /* |
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760 %!error (sleep ()); |
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761 %!error (sleep (1, 2)); |
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762 %!test |
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763 %! sleep (1); |
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764 */ |
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765 |
| 2630 | 766 DEFUN (usleep, args, , |
| 3301 | 767 "-*- texinfo -*-\n\ |
| 768 @deftypefn {Built-in Function} {} usleep (@var{microseconds})\n\ | |
| 769 Suspend the execution of the program for the given number of\n\ | |
| 770 microseconds. On systems where it is not possible to sleep for periods\n\ | |
| 771 of time less than one second, @code{usleep} will pause the execution for\n\ | |
| 772 @code{round (@var{microseconds} / 1e6)} seconds.\n\ | |
| 773 @end deftypefn") | |
| 2630 | 774 { |
| 775 octave_value_list retval; | |
| 776 | |
| 777 if (args.length () == 1) | |
| 778 { | |
| 779 double dval = args(0).double_value (); | |
| 780 | |
| 781 if (! error_state) | |
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782 { |
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783 if (xisnan (dval)) |
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784 warning ("usleep: NaN is an invalid delay"); |
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785 else |
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786 { |
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787 feval ("drawnow"); |
| 6423 | 788 |
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789 int delay = NINT (dval); |
| 2631 | 790 |
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791 if (delay > 0) |
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792 octave_usleep (delay); |
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793 } |
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794 } |
| 2630 | 795 } |
| 796 else | |
| 5823 | 797 print_usage (); |
| 529 | 798 |
| 799 return retval; | |
| 800 } | |
| 801 | |
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802 /* |
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803 %!error (usleep ()); |
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804 %!error (usleep (1, 2)); |
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805 %!test |
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806 %! usleep (1000); |
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807 */ |
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808 |
| 5775 | 809 // FIXME -- maybe this should only return 1 if IEEE floating |
| 862 | 810 // point functions really work. |
| 811 | |
| 1957 | 812 DEFUN (isieee, , , |
| 3301 | 813 "-*- texinfo -*-\n\ |
| 814 @deftypefn {Built-in Function} {} isieee ()\n\ | |
|
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815 Return true if your computer @emph{claims} to conform to the IEEE standard\n\ |
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816 for floating point calculations. No actual tests are performed.\n\ |
| 3301 | 817 @end deftypefn") |
| 862 | 818 { |
| 4600 | 819 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
| 2317 | 820 |
| 4574 | 821 return octave_value (flt_fmt == oct_mach_info::flt_fmt_ieee_little_endian |
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822 || flt_fmt == oct_mach_info::flt_fmt_ieee_big_endian); |
| 862 | 823 } |
| 824 | |
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825 /* |
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826 %!assert (islogical (isieee ())); |
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827 */ |
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828 |
| 4600 | 829 DEFUN (native_float_format, , , |
| 830 "-*- texinfo -*-\n\ | |
| 831 @deftypefn {Built-in Function} {} native_float_format ()\n\ | |
| 832 Return the native floating point format as a string\n\ | |
| 833 @end deftypefn") | |
| 834 { | |
| 835 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); | |
| 836 | |
| 837 return octave_value (oct_mach_info::float_format_as_string (flt_fmt)); | |
| 838 } | |
| 839 | |
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840 /* |
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841 %!assert (ischar (native_float_format ())); |
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842 */ |
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843 |
| 1957 | 844 DEFUN (tilde_expand, args, , |
| 3301 | 845 "-*- texinfo -*-\n\ |
| 846 @deftypefn {Built-in Function} {} tilde_expand (@var{string})\n\ | |
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847 Perform tilde expansion on @var{string}. If @var{string} begins with a\n\ |
| 3301 | 848 tilde character, (@samp{~}), all of the characters preceding the first\n\ |
| 849 slash (or all characters, if there is no slash) are treated as a\n\ | |
| 850 possible user name, and the tilde and the following characters up to the\n\ | |
| 851 slash are replaced by the home directory of the named user. If the\n\ | |
| 852 tilde is followed immediately by a slash, the tilde is replaced by the\n\ | |
| 10840 | 853 home directory of the user running Octave. For example:\n\ |
| 3301 | 854 \n\ |
| 855 @example\n\ | |
| 856 @group\n\ | |
| 857 tilde_expand (\"~joeuser/bin\")\n\ | |
| 858 @result{} \"/home/joeuser/bin\"\n\ | |
| 859 tilde_expand (\"~/bin\")\n\ | |
| 860 @result{} \"/home/jwe/bin\"\n\ | |
| 861 @end group\n\ | |
| 862 @end example\n\ | |
| 863 @end deftypefn") | |
| 1750 | 864 { |
| 4233 | 865 octave_value retval; |
| 1750 | 866 |
| 867 int nargin = args.length (); | |
| 868 | |
| 869 if (nargin == 1) | |
| 6116 | 870 { |
| 871 octave_value arg = args(0); | |
| 872 | |
| 873 string_vector sv = arg.all_strings (); | |
| 874 | |
| 875 if (! error_state) | |
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876 { |
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877 sv = file_ops::tilde_expand (sv); |
| 6116 | 878 |
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879 if (arg.is_cellstr ()) |
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880 retval = Cell (arg.dims (), sv); |
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881 else |
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882 retval = sv; |
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883 } |
| 6116 | 884 else |
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885 error ("tilde_expand: expecting argument to be char or cellstr object"); |
| 6116 | 886 } |
| 1750 | 887 else |
| 5823 | 888 print_usage (); |
| 1750 | 889 |
| 890 return retval; | |
| 891 } | |
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892 |
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893 /* |
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894 %!test |
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895 %! if (isempty (getenv ("HOME"))) |
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896 %! setenv ("HOME", "foobar"); |
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897 %! endif |
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898 %! home = getenv ("HOME"); |
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899 %! assert (tilde_expand ("~/foobar"), strcat (home, "/foobar")); |
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900 %! assert (tilde_expand ("/foo/bar"), "/foo/bar"); |
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901 %! assert (tilde_expand ("foo/bar"), "foo/bar"); |
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902 */ |