Mercurial > octave-nkf
annotate src/sysdep.cc @ 11234:2718e1fdf82f
IEEE math initialization tweaks
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 10 Nov 2010 21:52:51 -0500 |
| parents | 1dfbcc9eee92 |
| children | 0d9640d755b1 |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2003, |
| 8920 | 4 2005, 2006, 2007, 2008, 2009 John W. Eaton |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 240 | 24 #ifdef HAVE_CONFIG_H |
| 1192 | 25 #include <config.h> |
| 1 | 26 #endif |
| 27 | |
| 1346 | 28 #include <cfloat> |
| 1343 | 29 #include <cstddef> |
| 1346 | 30 #include <cstdio> |
| 1343 | 31 #include <cstdlib> |
| 32 #include <cstring> | |
| 33 | |
| 3503 | 34 #include <iostream> |
| 1728 | 35 #include <string> |
| 36 | |
| 529 | 37 #include <sys/types.h> |
| 38 #include <unistd.h> | |
| 1 | 39 |
| 1430 | 40 #if defined (HAVE_TERMIOS_H) |
| 41 #include <termios.h> | |
| 42 #elif defined (HAVE_TERMIO_H) | |
| 43 #include <termio.h> | |
| 44 #elif defined (HAVE_SGTTY_H) | |
| 45 #include <sgtty.h> | |
| 4067 | 46 #endif |
| 47 | |
| 48 #if defined (HAVE_CONIO_H) | |
| 49 #include <conio.h> | |
| 1430 | 50 #endif |
| 51 | |
| 3248 | 52 #if defined (HAVE_SYS_IOCTL_H) |
| 53 #include <sys/ioctl.h> | |
| 54 #endif | |
| 55 | |
| 1463 | 56 #if defined (HAVE_FLOATINGPOINT_H) |
| 57 #include <floatingpoint.h> | |
| 58 #endif | |
| 59 | |
| 2508 | 60 #if defined (HAVE_IEEEFP_H) |
| 61 #include <ieeefp.h> | |
| 62 #endif | |
| 63 | |
| 2926 | 64 #include "cmd-edit.h" |
| 65 #include "file-ops.h" | |
| 2893 | 66 #include "lo-mappers.h" |
| 7231 | 67 #include "lo-math.h" |
| 2317 | 68 #include "mach-info.h" |
| 2926 | 69 #include "oct-env.h" |
| 5451 | 70 #include "quit.h" |
| 1769 | 71 |
| 6208 | 72 #include "Cell.h" |
| 1352 | 73 #include "defun.h" |
| 74 #include "error.h" | |
| 529 | 75 #include "input.h" |
| 1755 | 76 #include "oct-obj.h" |
| 2370 | 77 #include "ov.h" |
| 3234 | 78 #include "pager.h" |
| 6419 | 79 #include "parse.h" |
| 5770 | 80 #include "sighandlers.h" |
| 1352 | 81 #include "sysdep.h" |
| 1755 | 82 #include "toplev.h" |
| 529 | 83 #include "utils.h" |
| 6598 | 84 #include "file-stat.h" |
| 529 | 85 |
| 86 #ifndef STDIN_FILENO | |
| 87 #define STDIN_FILENO 1 | |
| 88 #endif | |
| 444 | 89 |
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90 #if defined (__386BSD__) || defined (__FreeBSD__) || defined (__NetBSD__) |
| 2508 | 91 static void |
| 92 BSD_init (void) | |
| 93 { | |
| 94 #if defined (HAVE_FLOATINGPOINT_H) | |
| 95 // Disable trapping on common exceptions. | |
| 4164 | 96 #ifndef FP_X_DNML |
| 97 #define FP_X_DNML 0 | |
| 98 #endif | |
| 2508 | 99 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
| 100 #endif | |
| 101 } | |
| 102 #endif | |
| 103 | |
| 6956 | 104 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
| 6080 | 105 static void |
| 106 w32_set_octave_home (void) | |
| 107 { | |
| 108 int n = 1024; | |
| 109 | |
| 6086 | 110 std::string bin_dir (n, '\0'); |
| 6080 | 111 |
| 112 while (true) | |
| 113 { | |
| 6954 | 114 HMODULE hMod = GetModuleHandle ("octinterp"); |
| 115 int status = GetModuleFileName (hMod, &bin_dir[0], n); | |
| 6080 | 116 |
| 117 if (status < n) | |
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118 { |
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119 bin_dir.resize (status); |
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120 break; |
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121 } |
| 6080 | 122 else |
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123 { |
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124 n *= 2; |
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125 bin_dir.resize (n); |
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126 } |
| 6080 | 127 } |
| 128 | |
| 129 if (! bin_dir.empty ()) | |
| 130 { | |
| 131 size_t pos = bin_dir.rfind ("\\bin\\"); | |
| 132 | |
| 8021 | 133 if (pos != std::string::npos) |
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134 octave_env::putenv ("OCTAVE_HOME", bin_dir.substr (0, pos)); |
| 6080 | 135 } |
| 136 } | |
| 137 | |
| 6960 | 138 void |
| 5451 | 139 w32_set_quiet_shutdown (void) |
| 140 { | |
| 141 // Let the user close the console window or shutdown without the | |
| 142 // pesky dialog. | |
| 143 // | |
| 5775 | 144 // FIXME -- should this be user configurable? |
| 5451 | 145 SetProcessShutdownParameters (0x280, SHUTDOWN_NORETRY); |
| 146 } | |
| 147 | |
| 6960 | 148 void |
| 5451 | 149 MINGW_signal_cleanup (void) |
| 150 { | |
| 5455 | 151 w32_set_quiet_shutdown (); |
| 5451 | 152 |
| 5455 | 153 w32_raise_final (); |
| 5451 | 154 } |
| 155 #endif | |
| 156 | |
| 157 #if defined (__MINGW32__) | |
| 158 static void | |
| 159 MINGW_init (void) | |
| 160 { | |
| 6080 | 161 w32_set_octave_home (); |
| 162 | |
| 5451 | 163 // Init mutex to protect setjmp/longjmp and get main thread context |
| 164 w32_sigint_init (); | |
| 165 | |
| 166 w32_set_quiet_shutdown (); | |
| 167 } | |
| 168 #endif | |
| 169 | |
| 6080 | 170 #if defined (_MSC_VER) |
| 171 static void | |
| 172 MSVC_init (void) | |
| 173 { | |
| 174 w32_set_octave_home (); | |
| 6135 | 175 |
| 176 // Init mutex to protect setjmp/longjmp and get main thread context | |
| 177 w32_sigint_init (); | |
| 178 | |
| 179 w32_set_quiet_shutdown (); | |
| 6080 | 180 } |
| 181 #endif | |
| 182 | |
| 4091 | 183 |
| 6598 | 184 // Return TRUE if FILE1 and FILE2 refer to the same (physical) file. |
| 185 | |
| 186 bool | |
| 187 same_file_internal (const std::string& file1, const std::string& file2) | |
| 188 { | |
| 189 #ifdef OCTAVE_USE_WINDOWS_API | |
| 190 | |
| 6691 | 191 bool retval = false; |
| 192 | |
| 6598 | 193 // Windows native code |
| 194 // Reference: http://msdn2.microsoft.com/en-us/library/aa363788.aspx | |
| 195 | |
| 6691 | 196 HANDLE hfile1 = CreateFile (file1.c_str (), 0, FILE_SHARE_READ, 0, |
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197 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 6691 | 198 |
| 199 if (hfile1 != INVALID_HANDLE_VALUE) | |
| 200 { | |
| 201 HANDLE hfile2 = CreateFile (file2.c_str (), 0, FILE_SHARE_READ, 0, | |
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202 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| 6598 | 203 |
| 6691 | 204 if (hfile2 != INVALID_HANDLE_VALUE) |
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205 { |
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206 BY_HANDLE_FILE_INFORMATION hfi1; |
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207 BY_HANDLE_FILE_INFORMATION hfi2; |
| 6691 | 208 |
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209 if (GetFileInformationByHandle (hfile1, &hfi1) |
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210 && GetFileInformationByHandle (hfile2, &hfi2)) |
| 6598 | 211 |
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212 retval = (hfi1.dwVolumeSerialNumber == hfi2.dwVolumeSerialNumber |
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213 && hfi1.nFileIndexHigh == hfi2.nFileIndexHigh |
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214 && hfi1.nFileIndexLow == hfi2.nFileIndexLow); |
| 6598 | 215 |
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216 CloseHandle (hfile2); |
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217 } |
| 6691 | 218 |
| 6598 | 219 CloseHandle (hfile1); |
| 220 } | |
| 6691 | 221 |
| 222 return retval; | |
| 6598 | 223 |
| 224 #else | |
| 225 | |
| 226 // POSIX Code | |
| 227 | |
| 228 file_stat fs_file1 (file1); | |
| 229 file_stat fs_file2 (file2); | |
| 230 | |
| 231 return (fs_file1 && fs_file2 | |
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232 && fs_file1.ino () == fs_file2.ino () |
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233 && fs_file1.dev () == fs_file2.dev ()); |
| 6598 | 234 |
| 235 #endif | |
| 236 } | |
| 237 | |
| 1 | 238 void |
| 239 sysdep_init (void) | |
| 240 { | |
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241 #if defined (__386BSD__) || defined (__FreeBSD__) || defined(__NetBSD__) |
| 2508 | 242 BSD_init (); |
| 5451 | 243 #elif defined (__MINGW32__) |
| 244 MINGW_init (); | |
| 6080 | 245 #elif defined (_MSC_VER) |
| 246 MSVC_init (); | |
| 1 | 247 #endif |
| 248 } | |
| 249 | |
| 5451 | 250 void |
| 251 sysdep_cleanup (void) | |
| 252 { | |
| 253 MINGW_SIGNAL_CLEANUP (); | |
| 254 } | |
| 255 | |
| 767 | 256 // Set terminal in raw mode. From less-177. |
| 257 // | |
| 258 // Change terminal to "raw mode", or restore to "normal" mode. | |
| 259 // "Raw mode" means | |
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260 // 1. An outstanding read will complete on receipt of a single keystroke. |
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261 // 2. Input is not echoed. |
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262 // 3. On output, \n is mapped to \r\n. |
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263 // 4. \t is NOT expanded into spaces. |
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264 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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265 // etc. are NOT disabled. |
| 767 | 266 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
| 267 | |
| 529 | 268 void |
| 3657 | 269 raw_mode (bool on, bool wait) |
| 529 | 270 { |
| 3657 | 271 static bool curr_on = false; |
| 529 | 272 |
| 273 int tty_fd = STDIN_FILENO; | |
| 274 if (! isatty (tty_fd)) | |
| 275 { | |
| 276 if (interactive) | |
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277 error ("stdin is not a tty!"); |
| 529 | 278 return; |
| 279 } | |
| 280 | |
| 281 if (on == curr_on) | |
| 282 return; | |
| 283 | |
| 284 #if defined (HAVE_TERMIOS_H) | |
| 285 { | |
| 286 struct termios s; | |
| 287 static struct termios save_term; | |
| 288 | |
| 289 if (on) | |
| 290 { | |
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291 // Get terminal modes. |
| 529 | 292 |
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293 tcgetattr (tty_fd, &s); |
| 529 | 294 |
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295 // Save modes and set certain variables dependent on modes. |
| 529 | 296 |
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297 save_term = s; |
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298 // ospeed = s.c_cflag & CBAUD; |
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299 // erase_char = s.c_cc[VERASE]; |
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300 // kill_char = s.c_cc[VKILL]; |
| 529 | 301 |
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302 // Set the modes to the way we want them. |
| 529 | 303 |
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304 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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305 s.c_oflag |= (OPOST|ONLCR); |
| 529 | 306 #if defined (OCRNL) |
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307 s.c_oflag &= ~(OCRNL); |
| 529 | 308 #endif |
| 309 #if defined (ONOCR) | |
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310 s.c_oflag &= ~(ONOCR); |
| 529 | 311 #endif |
| 312 #if defined (ONLRET) | |
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313 s.c_oflag &= ~(ONLRET); |
| 529 | 314 #endif |
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315 s.c_cc[VMIN] = wait ? 1 : 0; |
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316 s.c_cc[VTIME] = 0; |
| 529 | 317 } |
| 318 else | |
| 319 { | |
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320 // Restore saved modes. |
| 1358 | 321 |
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322 s = save_term; |
| 529 | 323 } |
| 3658 | 324 |
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325 tcsetattr (tty_fd, wait ? TCSAFLUSH : TCSADRAIN, &s); |
| 529 | 326 } |
| 327 #elif defined (HAVE_TERMIO_H) | |
| 328 { | |
| 329 struct termio s; | |
| 330 static struct termio save_term; | |
| 331 | |
| 332 if (on) | |
| 333 { | |
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334 // Get terminal modes. |
| 529 | 335 |
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336 ioctl (tty_fd, TCGETA, &s); |
| 529 | 337 |
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338 // Save modes and set certain variables dependent on modes. |
| 529 | 339 |
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340 save_term = s; |
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341 // ospeed = s.c_cflag & CBAUD; |
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342 // erase_char = s.c_cc[VERASE]; |
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343 // kill_char = s.c_cc[VKILL]; |
| 529 | 344 |
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345 // Set the modes to the way we want them. |
| 529 | 346 |
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347 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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348 s.c_oflag |= (OPOST|ONLCR); |
| 529 | 349 #if defined (OCRNL) |
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350 s.c_oflag &= ~(OCRNL); |
| 529 | 351 #endif |
| 352 #if defined (ONOCR) | |
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353 s.c_oflag &= ~(ONOCR); |
| 529 | 354 #endif |
| 355 #if defined (ONLRET) | |
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356 s.c_oflag &= ~(ONLRET); |
| 529 | 357 #endif |
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358 s.c_cc[VMIN] = wait ? 1 : 0; |
| 529 | 359 } |
| 360 else | |
| 361 { | |
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362 // Restore saved modes. |
| 1358 | 363 |
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364 s = save_term; |
| 529 | 365 } |
| 3658 | 366 |
| 529 | 367 ioctl (tty_fd, TCSETAW, &s); |
| 368 } | |
| 369 #elif defined (HAVE_SGTTY_H) | |
| 370 { | |
| 371 struct sgttyb s; | |
| 372 static struct sgttyb save_term; | |
| 373 | |
| 374 if (on) | |
| 375 { | |
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376 // Get terminal modes. |
| 529 | 377 |
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378 ioctl (tty_fd, TIOCGETP, &s); |
| 529 | 379 |
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380 // Save modes and set certain variables dependent on modes. |
| 529 | 381 |
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382 save_term = s; |
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383 // ospeed = s.sg_ospeed; |
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384 // erase_char = s.sg_erase; |
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385 // kill_char = s.sg_kill; |
| 529 | 386 |
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387 // Set the modes to the way we want them. |
| 529 | 388 |
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389 s.sg_flags |= CBREAK; |
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390 s.sg_flags &= ~(ECHO); |
| 529 | 391 } |
| 392 else | |
| 393 { | |
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394 // Restore saved modes. |
| 1358 | 395 |
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396 s = save_term; |
| 529 | 397 } |
| 3658 | 398 |
| 529 | 399 ioctl (tty_fd, TIOCSETN, &s); |
| 400 } | |
| 401 #else | |
| 4064 | 402 warning ("no support for raw mode console I/O on this system"); |
| 403 | |
| 404 // Make sure the current mode doesn't toggle. | |
| 405 on = curr_on; | |
| 529 | 406 #endif |
| 407 | |
| 408 curr_on = on; | |
| 409 } | |
| 410 | |
| 6726 | 411 FILE * |
| 412 octave_popen (const char *command, const char *mode) | |
| 413 { | |
| 414 #if defined (__MINGW32__) || defined (_MSC_VER) | |
| 415 if (mode && mode[0] && ! mode[1]) | |
| 416 { | |
| 417 char tmode[3]; | |
| 418 tmode[0] = mode[0]; | |
| 419 tmode[1] = 'b'; | |
| 420 tmode[2] = 0; | |
| 421 | |
| 422 return _popen (command, tmode); | |
| 423 } | |
| 424 else | |
| 425 return _popen (command, mode); | |
| 426 #else | |
| 427 return popen (command, mode); | |
| 428 #endif | |
| 429 } | |
| 430 | |
| 431 int | |
| 432 octave_pclose (FILE *f) | |
| 433 { | |
| 434 #if defined (__MINGW32__) || defined (_MSC_VER) | |
| 435 return _pclose (f); | |
| 436 #else | |
| 437 return pclose (f); | |
| 438 #endif | |
| 439 } | |
| 440 | |
| 767 | 441 // Read one character from the terminal. |
| 442 | |
| 529 | 443 int |
| 4067 | 444 octave_kbhit (bool wait) |
| 529 | 445 { |
| 4067 | 446 #ifdef HAVE__KBHIT |
| 4081 | 447 int c = (! wait && ! _kbhit ()) ? 0 : std::cin.get (); |
| 4067 | 448 #else |
| 3658 | 449 raw_mode (true, wait); |
| 450 | |
| 5770 | 451 // Get current handler. |
| 452 octave_interrupt_handler saved_interrupt_handler | |
| 453 = octave_ignore_interrupts (); | |
| 454 | |
| 455 // Restore it, disabling system call restarts (if possible) so the | |
| 456 // read can be interrupted. | |
| 457 | |
| 458 octave_set_interrupt_handler (saved_interrupt_handler, false); | |
| 459 | |
| 3658 | 460 int c = std::cin.get (); |
| 5770 | 461 |
| 3658 | 462 if (std::cin.fail () || std::cin.eof ()) |
| 463 std::cin.clear (); | |
| 464 | |
| 5770 | 465 // Restore it, enabling system call restarts (if possible). |
| 466 octave_set_interrupt_handler (saved_interrupt_handler, true); | |
| 467 | |
| 3658 | 468 raw_mode (false, true); |
| 4067 | 469 #endif |
| 3658 | 470 |
| 529 | 471 return c; |
| 472 } | |
| 473 | |
| 1957 | 474 DEFUN (clc, , , |
| 3332 | 475 "-*- texinfo -*-\n\ |
| 10840 | 476 @deftypefn {Built-in Function} {} clc ()\n\ |
| 3332 | 477 @deftypefnx {Built-in Function} {} home ()\n\ |
| 478 Clear the terminal screen and move the cursor to the upper left corner.\n\ | |
| 3333 | 479 @end deftypefn") |
| 529 | 480 { |
| 2926 | 481 command_editor::clear_screen (); |
| 529 | 482 |
| 2926 | 483 return octave_value_list (); |
| 529 | 484 } |
| 485 | |
| 549 | 486 DEFALIAS (home, clc); |
| 487 | |
| 1957 | 488 DEFUN (getenv, args, , |
| 3301 | 489 "-*- texinfo -*-\n\ |
| 490 @deftypefn {Built-in Function} {} getenv (@var{var})\n\ | |
| 491 Return the value of the environment variable @var{var}. For example,\n\ | |
| 492 \n\ | |
| 493 @example\n\ | |
| 494 getenv (\"PATH\")\n\ | |
| 495 @end example\n\ | |
| 496 \n\ | |
| 497 @noindent\n\ | |
| 498 returns a string containing the value of your path.\n\ | |
| 499 @end deftypefn") | |
| 529 | 500 { |
| 4233 | 501 octave_value retval; |
| 529 | 502 |
| 503 int nargin = args.length (); | |
| 504 | |
| 712 | 505 if (nargin == 1) |
| 529 | 506 { |
| 3523 | 507 std::string name = args(0).string_value (); |
| 636 | 508 |
| 509 if (! error_state) | |
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510 retval = octave_env::getenv (name); |
| 529 | 511 } |
| 512 else | |
| 5823 | 513 print_usage (); |
| 529 | 514 |
| 515 return retval; | |
| 516 } | |
| 517 | |
| 1957 | 518 DEFUN (putenv, args, , |
| 3301 | 519 "-*- texinfo -*-\n\ |
| 10840 | 520 @deftypefn {Built-in Function} {} putenv (@var{var}, @var{value})\n\ |
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521 @deftypefnx {Built-in Function} {} setenv (@var{var}, @var{value})\n\ |
| 3301 | 522 Set the value of the environment variable @var{var} to @var{value}.\n\ |
| 523 @end deftypefn") | |
| 1706 | 524 { |
| 2086 | 525 octave_value_list retval; |
| 1706 | 526 |
| 527 int nargin = args.length (); | |
| 528 | |
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529 if (nargin == 2 || nargin == 1) |
| 1706 | 530 { |
| 3523 | 531 std::string var = args(0).string_value (); |
| 1706 | 532 |
| 533 if (! error_state) | |
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534 { |
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535 std::string val = (nargin == 2 |
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536 ? args(1).string_value () : std::string ()); |
| 1706 | 537 |
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538 if (! error_state) |
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539 octave_env::putenv (var, val); |
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540 else |
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541 error ("putenv: second argument should be a string"); |
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542 } |
| 1706 | 543 else |
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544 error ("putenv: first argument should be a string"); |
| 1706 | 545 } |
| 546 else | |
| 5823 | 547 print_usage (); |
| 1706 | 548 |
| 549 return retval; | |
| 550 } | |
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551 DEFALIAS (setenv, putenv); |
| 1706 | 552 |
| 5775 | 553 // FIXME -- perhaps kbhit should also be able to print a prompt? |
| 3372 | 554 |
| 3657 | 555 DEFUN (kbhit, args, , |
| 3372 | 556 "-*- texinfo -*-\n\ |
| 557 @deftypefn {Built-in Function} {} kbhit ()\n\ | |
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558 Read a single keystroke from the keyboard. If called with one\n\ |
| 3657 | 559 argument, don't wait for a keypress. For example,\n\ |
| 3372 | 560 \n\ |
| 561 @example\n\ | |
| 562 x = kbhit ();\n\ | |
| 563 @end example\n\ | |
| 564 \n\ | |
| 565 @noindent\n\ | |
| 566 will set @var{x} to the next character typed at the keyboard as soon as\n\ | |
| 567 it is typed.\n\ | |
| 3657 | 568 \n\ |
| 569 @example\n\ | |
| 570 x = kbhit (1);\n\ | |
| 571 @end example\n\ | |
| 572 \n\ | |
| 573 @noindent\n\ | |
| 574 identical to the above example, but don't wait for a keypress,\n\ | |
| 575 returning the empty string if no key is available.\n\ | |
| 3372 | 576 @end deftypefn") |
| 529 | 577 { |
| 4233 | 578 octave_value retval; |
| 529 | 579 |
| 5775 | 580 // FIXME -- add timeout and default value args? |
| 529 | 581 |
| 3676 | 582 if (interactive || forced_interactive) |
| 529 | 583 { |
| 6423 | 584 feval ("drawnow"); |
| 585 | |
| 4067 | 586 int c = octave_kbhit (args.length () == 0); |
| 3657 | 587 |
| 3658 | 588 if (c == -1) |
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589 c = 0; |
| 3657 | 590 |
| 529 | 591 char *s = new char [2]; |
| 592 s[0] = c; | |
| 593 s[1] = '\0'; | |
| 594 retval = s; | |
| 595 } | |
| 596 | |
| 597 return retval; | |
| 598 } | |
| 599 | |
| 1957 | 600 DEFUN (pause, args, , |
| 3301 | 601 "-*- texinfo -*-\n\ |
| 602 @deftypefn {Built-in Function} {} pause (@var{seconds})\n\ | |
| 603 Suspend the execution of the program. If invoked without any arguments,\n\ | |
| 604 Octave waits until you type a character. With a numeric argument, it\n\ | |
| 605 pauses for the given number of seconds. For example, the following\n\ | |
| 606 statement prints a message and then waits 5 seconds before clearing the\n\ | |
| 607 screen.\n\ | |
| 608 \n\ | |
| 609 @example\n\ | |
| 610 @group\n\ | |
| 6848 | 611 fprintf (stderr, \"wait please...\\n\");\n\ |
| 3301 | 612 pause (5);\n\ |
| 613 clc;\n\ | |
| 614 @end group\n\ | |
| 615 @end example\n\ | |
| 616 @end deftypefn") | |
| 529 | 617 { |
| 2086 | 618 octave_value_list retval; |
| 529 | 619 |
| 620 int nargin = args.length (); | |
| 621 | |
| 712 | 622 if (! (nargin == 0 || nargin == 1)) |
| 529 | 623 { |
| 5823 | 624 print_usage (); |
| 529 | 625 return retval; |
| 626 } | |
| 627 | |
| 1579 | 628 if (nargin == 1) |
| 529 | 629 { |
| 1579 | 630 double dval = args(0).double_value (); |
| 636 | 631 |
| 1579 | 632 if (! error_state) |
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633 { |
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634 if (! xisnan (dval)) |
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635 { |
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636 feval ("drawnow"); |
| 6419 | 637 |
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638 if (xisinf (dval)) |
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639 { |
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640 flush_octave_stdout (); |
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641 octave_kbhit (); |
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642 } |
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643 else |
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644 octave_sleep (dval); |
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645 } |
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646 else |
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647 warning ("pause: NaN is an invalid delay"); |
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648 } |
| 529 | 649 } |
| 1579 | 650 else |
| 3234 | 651 { |
| 6423 | 652 feval ("drawnow"); |
| 3234 | 653 flush_octave_stdout (); |
| 4067 | 654 octave_kbhit (); |
| 3234 | 655 } |
| 2630 | 656 |
| 657 return retval; | |
| 658 } | |
| 659 | |
| 660 DEFUN (sleep, args, , | |
| 3301 | 661 "-*- texinfo -*-\n\ |
| 662 @deftypefn {Built-in Function} {} sleep (@var{seconds})\n\ | |
| 663 Suspend the execution of the program for the given number of seconds.\n\ | |
| 664 @end deftypefn") | |
| 2630 | 665 { |
| 666 octave_value_list retval; | |
| 667 | |
| 668 if (args.length () == 1) | |
| 1579 | 669 { |
| 2630 | 670 double dval = args(0).double_value (); |
| 671 | |
| 672 if (! error_state) | |
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673 { |
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674 if (xisnan (dval)) |
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675 warning ("sleep: NaN is an invalid delay"); |
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676 else |
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677 { |
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678 feval ("drawnow"); |
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679 octave_sleep (dval); |
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680 } |
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681 } |
| 1579 | 682 } |
| 2630 | 683 else |
| 5823 | 684 print_usage (); |
| 2630 | 685 |
| 686 return retval; | |
| 687 } | |
| 688 | |
| 689 DEFUN (usleep, args, , | |
| 3301 | 690 "-*- texinfo -*-\n\ |
| 691 @deftypefn {Built-in Function} {} usleep (@var{microseconds})\n\ | |
| 692 Suspend the execution of the program for the given number of\n\ | |
| 693 microseconds. On systems where it is not possible to sleep for periods\n\ | |
| 694 of time less than one second, @code{usleep} will pause the execution for\n\ | |
| 695 @code{round (@var{microseconds} / 1e6)} seconds.\n\ | |
| 696 @end deftypefn") | |
| 2630 | 697 { |
| 698 octave_value_list retval; | |
| 699 | |
| 700 if (args.length () == 1) | |
| 701 { | |
| 702 double dval = args(0).double_value (); | |
| 703 | |
| 704 if (! error_state) | |
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705 { |
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706 if (xisnan (dval)) |
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707 warning ("usleep: NaN is an invalid delay"); |
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708 else |
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709 { |
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710 feval ("drawnow"); |
| 6423 | 711 |
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712 int delay = NINT (dval); |
| 2631 | 713 |
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714 if (delay > 0) |
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715 octave_usleep (delay); |
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716 } |
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717 } |
| 2630 | 718 } |
| 719 else | |
| 5823 | 720 print_usage (); |
| 529 | 721 |
| 722 return retval; | |
| 723 } | |
| 724 | |
| 5775 | 725 // FIXME -- maybe this should only return 1 if IEEE floating |
| 862 | 726 // point functions really work. |
| 727 | |
| 1957 | 728 DEFUN (isieee, , , |
| 3301 | 729 "-*- texinfo -*-\n\ |
| 730 @deftypefn {Built-in Function} {} isieee ()\n\ | |
| 731 Return 1 if your computer claims to conform to the IEEE standard for\n\ | |
| 732 floating point calculations.\n\ | |
| 733 @end deftypefn") | |
| 862 | 734 { |
| 4600 | 735 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
| 2317 | 736 |
| 4574 | 737 return octave_value (flt_fmt == oct_mach_info::flt_fmt_ieee_little_endian |
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738 || flt_fmt == oct_mach_info::flt_fmt_ieee_big_endian); |
| 862 | 739 } |
| 740 | |
| 4600 | 741 DEFUN (native_float_format, , , |
| 742 "-*- texinfo -*-\n\ | |
| 743 @deftypefn {Built-in Function} {} native_float_format ()\n\ | |
| 744 Return the native floating point format as a string\n\ | |
| 745 @end deftypefn") | |
| 746 { | |
| 747 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); | |
| 748 | |
| 749 return octave_value (oct_mach_info::float_format_as_string (flt_fmt)); | |
| 750 } | |
| 751 | |
| 1957 | 752 DEFUN (tilde_expand, args, , |
| 3301 | 753 "-*- texinfo -*-\n\ |
| 754 @deftypefn {Built-in Function} {} tilde_expand (@var{string})\n\ | |
| 755 Performs tilde expansion on @var{string}. If @var{string} begins with a\n\ | |
| 756 tilde character, (@samp{~}), all of the characters preceding the first\n\ | |
| 757 slash (or all characters, if there is no slash) are treated as a\n\ | |
| 758 possible user name, and the tilde and the following characters up to the\n\ | |
| 759 slash are replaced by the home directory of the named user. If the\n\ | |
| 760 tilde is followed immediately by a slash, the tilde is replaced by the\n\ | |
| 10840 | 761 home directory of the user running Octave. For example:\n\ |
| 3301 | 762 \n\ |
| 763 @example\n\ | |
| 764 @group\n\ | |
| 765 tilde_expand (\"~joeuser/bin\")\n\ | |
| 766 @result{} \"/home/joeuser/bin\"\n\ | |
| 767 tilde_expand (\"~/bin\")\n\ | |
| 768 @result{} \"/home/jwe/bin\"\n\ | |
| 769 @end group\n\ | |
| 770 @end example\n\ | |
| 771 @end deftypefn") | |
| 1750 | 772 { |
| 4233 | 773 octave_value retval; |
| 1750 | 774 |
| 775 int nargin = args.length (); | |
| 776 | |
| 777 if (nargin == 1) | |
| 6116 | 778 { |
| 779 octave_value arg = args(0); | |
| 780 | |
| 781 string_vector sv = arg.all_strings (); | |
| 782 | |
| 783 if (! error_state) | |
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784 { |
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785 sv = file_ops::tilde_expand (sv); |
| 6116 | 786 |
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787 if (arg.is_cellstr ()) |
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788 retval = Cell (arg.dims (), sv); |
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789 else |
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790 retval = sv; |
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791 } |
| 6116 | 792 else |
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793 error ("tilde_expand: expecting argument to be char or cellstr object"); |
| 6116 | 794 } |
| 1750 | 795 else |
| 5823 | 796 print_usage (); |
| 1750 | 797 |
| 798 return retval; | |
| 799 } |