Mercurial > hg > octave-nkf
annotate libinterp/corefcn/sysdep.cc @ 17744:d63878346099
maint: Update copyright notices for release.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 23 Oct 2013 22:09:27 -0400 |
parents | 68fc671a9339 |
children | 175b392e91fe |
rev | line source |
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1 | 1 /* |
2 | |
17744
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3 Copyright (C) 1993-2013 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" |
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72 #include "builtins.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) |
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105 |
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106 #define WIN32_LEAN_AND_MEAN |
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107 #include <tlhelp32.h> |
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108 |
6080 | 109 static void |
110 w32_set_octave_home (void) | |
111 { | |
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112 std::string bin_dir; |
6080 | 113 |
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114 HANDLE h = CreateToolhelp32Snapshot (TH32CS_SNAPMODULE |
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115 #ifdef TH32CS_SNAPMODULE32 |
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116 | TH32CS_SNAPMODULE32 |
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117 #endif |
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118 , 0); |
6080 | 119 |
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120 if (h != INVALID_HANDLE_VALUE) |
6080 | 121 { |
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122 MODULEENTRY32 mod_info; |
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123 |
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124 ZeroMemory (&mod_info, sizeof (mod_info)); |
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125 mod_info.dwSize = sizeof (mod_info); |
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126 |
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127 if (Module32First (h, &mod_info)) |
14445 | 128 { |
129 do | |
130 { | |
131 std::string mod_name (mod_info.szModule); | |
6080 | 132 |
14445 | 133 if (mod_name.find ("octinterp") != std::string::npos) |
134 { | |
135 bin_dir = mod_info.szExePath; | |
136 if (bin_dir[bin_dir.length () - 1] != '\\') | |
137 bin_dir.append (1, '\\'); | |
138 break; | |
139 } | |
140 } | |
141 while (Module32Next (h, &mod_info)); | |
142 } | |
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143 |
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144 CloseHandle (h); |
6080 | 145 } |
146 | |
147 if (! bin_dir.empty ()) | |
148 { | |
149 size_t pos = bin_dir.rfind ("\\bin\\"); | |
150 | |
8021 | 151 if (pos != std::string::npos) |
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152 octave_env::putenv ("OCTAVE_HOME", bin_dir.substr (0, pos)); |
6080 | 153 } |
154 } | |
155 | |
6960 | 156 void |
5451 | 157 w32_set_quiet_shutdown (void) |
158 { | |
159 // Let the user close the console window or shutdown without the | |
160 // pesky dialog. | |
161 // | |
5775 | 162 // FIXME -- should this be user configurable? |
5451 | 163 SetProcessShutdownParameters (0x280, SHUTDOWN_NORETRY); |
164 } | |
165 | |
6960 | 166 void |
5451 | 167 MINGW_signal_cleanup (void) |
168 { | |
5455 | 169 w32_set_quiet_shutdown (); |
5451 | 170 } |
171 #endif | |
172 | |
173 #if defined (__MINGW32__) | |
174 static void | |
175 MINGW_init (void) | |
176 { | |
6080 | 177 w32_set_octave_home (); |
5451 | 178 } |
179 #endif | |
180 | |
6080 | 181 #if defined (_MSC_VER) |
182 static void | |
183 MSVC_init (void) | |
184 { | |
185 w32_set_octave_home (); | |
186 } | |
187 #endif | |
188 | |
4091 | 189 |
6598 | 190 // Return TRUE if FILE1 and FILE2 refer to the same (physical) file. |
191 | |
192 bool | |
193 same_file_internal (const std::string& file1, const std::string& file2) | |
194 { | |
195 #ifdef OCTAVE_USE_WINDOWS_API | |
196 | |
6691 | 197 bool retval = false; |
198 | |
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199 const char *f1 = file1.c_str (); |
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200 const char *f2 = file2.c_str (); |
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201 |
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202 bool f1_is_dir = GetFileAttributes (f1) & FILE_ATTRIBUTE_DIRECTORY; |
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203 bool f2_is_dir = GetFileAttributes (f2) & FILE_ATTRIBUTE_DIRECTORY; |
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204 |
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205 // Windows native code |
6598 | 206 // Reference: http://msdn2.microsoft.com/en-us/library/aa363788.aspx |
207 | |
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208 DWORD share = FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE; |
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209 |
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210 HANDLE hfile1 |
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211 = CreateFile (f1, 0, share, 0, OPEN_EXISTING, |
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212 f1_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); |
6691 | 213 |
214 if (hfile1 != INVALID_HANDLE_VALUE) | |
215 { | |
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216 HANDLE hfile2 |
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217 = CreateFile (f2, 0, share, 0, OPEN_EXISTING, |
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218 f2_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); |
6598 | 219 |
6691 | 220 if (hfile2 != INVALID_HANDLE_VALUE) |
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221 { |
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222 BY_HANDLE_FILE_INFORMATION hfi1; |
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223 BY_HANDLE_FILE_INFORMATION hfi2; |
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224 |
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225 if (GetFileInformationByHandle (hfile1, &hfi1) |
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226 && GetFileInformationByHandle (hfile2, &hfi2)) |
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227 { |
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228 retval = (hfi1.dwVolumeSerialNumber == hfi2.dwVolumeSerialNumber |
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229 && hfi1.nFileIndexHigh == hfi2.nFileIndexHigh |
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230 && hfi1.nFileIndexLow == hfi2.nFileIndexLow); |
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231 } |
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 { |
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537 bool skip_redisplay = true; |
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538 |
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539 command_editor::clear_screen (skip_redisplay); |
529 | 540 |
2926 | 541 return octave_value_list (); |
529 | 542 } |
543 | |
549 | 544 DEFALIAS (home, clc); |
545 | |
1957 | 546 DEFUN (getenv, args, , |
3301 | 547 "-*- texinfo -*-\n\ |
548 @deftypefn {Built-in Function} {} getenv (@var{var})\n\ | |
549 Return the value of the environment variable @var{var}. For example,\n\ | |
550 \n\ | |
551 @example\n\ | |
552 getenv (\"PATH\")\n\ | |
553 @end example\n\ | |
554 \n\ | |
555 @noindent\n\ | |
556 returns a string containing the value of your path.\n\ | |
557 @end deftypefn") | |
529 | 558 { |
4233 | 559 octave_value retval; |
529 | 560 |
561 int nargin = args.length (); | |
562 | |
712 | 563 if (nargin == 1) |
529 | 564 { |
3523 | 565 std::string name = args(0).string_value (); |
636 | 566 |
567 if (! error_state) | |
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568 retval = octave_env::getenv (name); |
529 | 569 } |
570 else | |
5823 | 571 print_usage (); |
529 | 572 |
573 return retval; | |
574 } | |
575 | |
1957 | 576 DEFUN (putenv, args, , |
3301 | 577 "-*- texinfo -*-\n\ |
10840 | 578 @deftypefn {Built-in Function} {} putenv (@var{var}, @var{value})\n\ |
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579 @deftypefnx {Built-in Function} {} setenv (@var{var}, @var{value})\n\ |
3301 | 580 Set the value of the environment variable @var{var} to @var{value}.\n\ |
581 @end deftypefn") | |
1706 | 582 { |
2086 | 583 octave_value_list retval; |
1706 | 584 |
585 int nargin = args.length (); | |
586 | |
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587 if (nargin == 2 || nargin == 1) |
1706 | 588 { |
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589 std::string var = args(0).string_value (); |
1706 | 590 |
591 if (! error_state) | |
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592 { |
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593 std::string val = (nargin == 2 |
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594 ? args(1).string_value () : std::string ()); |
1706 | 595 |
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596 if (! error_state) |
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597 octave_env::putenv (var, val); |
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598 else |
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599 error ("putenv: VALUE must be a string"); |
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600 } |
1706 | 601 else |
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602 error ("putenv: VAR must be a string"); |
1706 | 603 } |
604 else | |
5823 | 605 print_usage (); |
1706 | 606 |
607 return retval; | |
608 } | |
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609 |
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610 DEFALIAS (setenv, putenv); |
1706 | 611 |
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612 /* |
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613 %!assert (ischar (getenv ("OCTAVE_HOME"))) |
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614 %!test |
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615 %! setenv ("dummy_variable_that_cannot_matter", "foobar"); |
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616 %! assert (getenv ("dummy_variable_that_cannot_matter"), "foobar"); |
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617 */ |
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618 |
5775 | 619 // FIXME -- perhaps kbhit should also be able to print a prompt? |
3372 | 620 |
3657 | 621 DEFUN (kbhit, args, , |
3372 | 622 "-*- texinfo -*-\n\ |
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623 @deftypefn {Built-in Function} {} kbhit ()\n\ |
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624 @deftypefnx {Built-in Function} {} kbhit (1)\n\ |
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625 Read a single keystroke from the keyboard. If called with an\n\ |
3657 | 626 argument, don't wait for a keypress. For example,\n\ |
3372 | 627 \n\ |
628 @example\n\ | |
629 x = kbhit ();\n\ | |
630 @end example\n\ | |
631 \n\ | |
632 @noindent\n\ | |
633 will set @var{x} to the next character typed at the keyboard as soon as\n\ | |
634 it is typed.\n\ | |
3657 | 635 \n\ |
636 @example\n\ | |
637 x = kbhit (1);\n\ | |
638 @end example\n\ | |
639 \n\ | |
640 @noindent\n\ | |
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641 is identical to the above example, but doesn't wait for a keypress,\n\ |
3657 | 642 returning the empty string if no key is available.\n\ |
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643 @seealso{input}\n\ |
3372 | 644 @end deftypefn") |
529 | 645 { |
4233 | 646 octave_value retval; |
529 | 647 |
5775 | 648 // FIXME -- add timeout and default value args? |
529 | 649 |
3676 | 650 if (interactive || forced_interactive) |
529 | 651 { |
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652 Fdrawnow (); |
6423 | 653 |
4067 | 654 int c = octave_kbhit (args.length () == 0); |
3657 | 655 |
3658 | 656 if (c == -1) |
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657 c = 0; |
3657 | 658 |
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659 char s[2] = { static_cast<char> (c), '\0' }; |
16015 | 660 |
529 | 661 retval = s; |
662 } | |
663 | |
664 return retval; | |
665 } | |
666 | |
1957 | 667 DEFUN (pause, args, , |
3301 | 668 "-*- texinfo -*-\n\ |
669 @deftypefn {Built-in Function} {} pause (@var{seconds})\n\ | |
670 Suspend the execution of the program. If invoked without any arguments,\n\ | |
671 Octave waits until you type a character. With a numeric argument, it\n\ | |
672 pauses for the given number of seconds. For example, the following\n\ | |
673 statement prints a message and then waits 5 seconds before clearing the\n\ | |
674 screen.\n\ | |
675 \n\ | |
676 @example\n\ | |
677 @group\n\ | |
6848 | 678 fprintf (stderr, \"wait please...\\n\");\n\ |
3301 | 679 pause (5);\n\ |
680 clc;\n\ | |
681 @end group\n\ | |
682 @end example\n\ | |
683 @end deftypefn") | |
529 | 684 { |
2086 | 685 octave_value_list retval; |
529 | 686 |
687 int nargin = args.length (); | |
688 | |
712 | 689 if (! (nargin == 0 || nargin == 1)) |
529 | 690 { |
5823 | 691 print_usage (); |
529 | 692 return retval; |
693 } | |
694 | |
1579 | 695 if (nargin == 1) |
529 | 696 { |
1579 | 697 double dval = args(0).double_value (); |
636 | 698 |
1579 | 699 if (! error_state) |
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700 { |
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701 if (! xisnan (dval)) |
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702 { |
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703 Fdrawnow (); |
6419 | 704 |
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705 if (xisinf (dval)) |
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706 { |
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707 flush_octave_stdout (); |
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708 octave_kbhit (); |
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709 } |
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710 else |
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711 octave_sleep (dval); |
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712 } |
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713 else |
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714 warning ("pause: NaN is an invalid delay"); |
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715 } |
529 | 716 } |
1579 | 717 else |
3234 | 718 { |
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719 Fdrawnow (); |
3234 | 720 flush_octave_stdout (); |
4067 | 721 octave_kbhit (); |
3234 | 722 } |
2630 | 723 |
724 return retval; | |
725 } | |
726 | |
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727 /* |
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728 %!test |
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729 %! pause (1); |
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730 |
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731 %!error (pause (1, 2)) |
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732 */ |
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733 |
2630 | 734 DEFUN (sleep, args, , |
3301 | 735 "-*- texinfo -*-\n\ |
736 @deftypefn {Built-in Function} {} sleep (@var{seconds})\n\ | |
737 Suspend the execution of the program for the given number of seconds.\n\ | |
738 @end deftypefn") | |
2630 | 739 { |
740 octave_value_list retval; | |
741 | |
742 if (args.length () == 1) | |
1579 | 743 { |
2630 | 744 double dval = args(0).double_value (); |
745 | |
746 if (! error_state) | |
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747 { |
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748 if (xisnan (dval)) |
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749 warning ("sleep: NaN is an invalid delay"); |
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750 else |
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751 { |
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752 Fdrawnow (); |
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753 octave_sleep (dval); |
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754 } |
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755 } |
1579 | 756 } |
2630 | 757 else |
5823 | 758 print_usage (); |
2630 | 759 |
760 return retval; | |
761 } | |
762 | |
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763 /* |
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764 %!test |
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765 %! sleep (1); |
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766 |
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767 %!error (sleep ()) |
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768 %!error (sleep (1, 2)) |
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769 */ |
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770 |
2630 | 771 DEFUN (usleep, args, , |
3301 | 772 "-*- texinfo -*-\n\ |
773 @deftypefn {Built-in Function} {} usleep (@var{microseconds})\n\ | |
774 Suspend the execution of the program for the given number of\n\ | |
775 microseconds. On systems where it is not possible to sleep for periods\n\ | |
776 of time less than one second, @code{usleep} will pause the execution for\n\ | |
777 @code{round (@var{microseconds} / 1e6)} seconds.\n\ | |
778 @end deftypefn") | |
2630 | 779 { |
780 octave_value_list retval; | |
781 | |
782 if (args.length () == 1) | |
783 { | |
784 double dval = args(0).double_value (); | |
785 | |
786 if (! error_state) | |
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787 { |
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788 if (xisnan (dval)) |
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789 warning ("usleep: NaN is an invalid delay"); |
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790 else |
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791 { |
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792 Fdrawnow (); |
6423 | 793 |
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794 int delay = NINT (dval); |
2631 | 795 |
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796 if (delay > 0) |
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797 octave_usleep (delay); |
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798 } |
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799 } |
2630 | 800 } |
801 else | |
5823 | 802 print_usage (); |
529 | 803 |
804 return retval; | |
805 } | |
806 | |
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807 /* |
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808 %!test |
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809 %! usleep (1000); |
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810 |
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811 %!error (usleep ()) |
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812 %!error (usleep (1, 2)) |
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813 */ |
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814 |
5775 | 815 // FIXME -- maybe this should only return 1 if IEEE floating |
862 | 816 // point functions really work. |
817 | |
1957 | 818 DEFUN (isieee, , , |
3301 | 819 "-*- texinfo -*-\n\ |
820 @deftypefn {Built-in Function} {} isieee ()\n\ | |
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821 Return true if your computer @emph{claims} to conform to the IEEE standard\n\ |
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822 for floating point calculations. No actual tests are performed.\n\ |
3301 | 823 @end deftypefn") |
862 | 824 { |
4600 | 825 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
2317 | 826 |
4574 | 827 return octave_value (flt_fmt == oct_mach_info::flt_fmt_ieee_little_endian |
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828 || flt_fmt == oct_mach_info::flt_fmt_ieee_big_endian); |
862 | 829 } |
830 | |
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831 /* |
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832 %!assert (islogical (isieee ())) |
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833 */ |
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834 |
4600 | 835 DEFUN (native_float_format, , , |
836 "-*- texinfo -*-\n\ | |
837 @deftypefn {Built-in Function} {} native_float_format ()\n\ | |
838 Return the native floating point format as a string\n\ | |
839 @end deftypefn") | |
840 { | |
841 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); | |
842 | |
843 return octave_value (oct_mach_info::float_format_as_string (flt_fmt)); | |
844 } | |
845 | |
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846 /* |
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847 %!assert (ischar (native_float_format ())) |
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848 */ |
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849 |
1957 | 850 DEFUN (tilde_expand, args, , |
3301 | 851 "-*- texinfo -*-\n\ |
852 @deftypefn {Built-in Function} {} tilde_expand (@var{string})\n\ | |
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853 Perform tilde expansion on @var{string}. If @var{string} begins with a\n\ |
3301 | 854 tilde character, (@samp{~}), all of the characters preceding the first\n\ |
855 slash (or all characters, if there is no slash) are treated as a\n\ | |
856 possible user name, and the tilde and the following characters up to the\n\ | |
857 slash are replaced by the home directory of the named user. If the\n\ | |
858 tilde is followed immediately by a slash, the tilde is replaced by the\n\ | |
10840 | 859 home directory of the user running Octave. For example:\n\ |
3301 | 860 \n\ |
861 @example\n\ | |
862 @group\n\ | |
863 tilde_expand (\"~joeuser/bin\")\n\ | |
864 @result{} \"/home/joeuser/bin\"\n\ | |
865 tilde_expand (\"~/bin\")\n\ | |
866 @result{} \"/home/jwe/bin\"\n\ | |
867 @end group\n\ | |
868 @end example\n\ | |
869 @end deftypefn") | |
1750 | 870 { |
4233 | 871 octave_value retval; |
1750 | 872 |
873 int nargin = args.length (); | |
874 | |
875 if (nargin == 1) | |
6116 | 876 { |
877 octave_value arg = args(0); | |
878 | |
879 string_vector sv = arg.all_strings (); | |
880 | |
881 if (! error_state) | |
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882 { |
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883 sv = file_ops::tilde_expand (sv); |
6116 | 884 |
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885 if (arg.is_cellstr ()) |
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886 retval = Cell (arg.dims (), sv); |
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887 else |
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888 retval = sv; |
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889 } |
6116 | 890 else |
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891 error ("tilde_expand: expecting argument to be char or cellstr object"); |
6116 | 892 } |
1750 | 893 else |
5823 | 894 print_usage (); |
1750 | 895 |
896 return retval; | |
897 } | |
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898 |
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899 /* |
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900 %!test |
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901 %! if (isempty (getenv ("HOME"))) |
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902 %! setenv ("HOME", "foobar"); |
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903 %! endif |
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904 %! home = getenv ("HOME"); |
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905 %! assert (tilde_expand ("~/foobar"), strcat (home, "/foobar")); |
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906 %! assert (tilde_expand ("/foo/bar"), "/foo/bar"); |
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907 %! assert (tilde_expand ("foo/bar"), "foo/bar"); |
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908 */ |