Mercurial > octave
annotate libinterp/corefcn/sysdep.cc @ 21556:12f207a534aa
maint: merge stable to default.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 28 Mar 2016 22:56:18 -0400 |
parents | 40de9f8f23a6 9f0088f3f335 |
children | f6663c49870c |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2015 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 |
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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) |
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40 # include <termios.h> |
1430 | 41 #elif defined (HAVE_TERMIO_H) |
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42 # include <termio.h> |
1430 | 43 #elif defined (HAVE_SGTTY_H) |
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44 # include <sgtty.h> |
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45 #endif |
4067 | 46 |
47 #if defined (HAVE_CONIO_H) | |
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48 # include <conio.h> |
1430 | 49 #endif |
50 | |
3248 | 51 #if defined (HAVE_SYS_IOCTL_H) |
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52 # include <sys/ioctl.h> |
3248 | 53 #endif |
54 | |
1463 | 55 #if defined (HAVE_FLOATINGPOINT_H) |
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56 # include <floatingpoint.h> |
1463 | 57 #endif |
58 | |
2508 | 59 #if defined (HAVE_IEEEFP_H) |
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60 # include <ieeefp.h> |
2508 | 61 #endif |
62 | |
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63 #if defined (HAVE_OMP_H) |
21556 | 64 # include <omp.h> |
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65 #endif |
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66 |
2926 | 67 #include "cmd-edit.h" |
68 #include "file-ops.h" | |
2893 | 69 #include "lo-mappers.h" |
7231 | 70 #include "lo-math.h" |
2317 | 71 #include "mach-info.h" |
2926 | 72 #include "oct-env.h" |
5451 | 73 #include "quit.h" |
1769 | 74 |
6208 | 75 #include "Cell.h" |
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76 #include "builtins.h" |
1352 | 77 #include "defun.h" |
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78 #include "display.h" |
1352 | 79 #include "error.h" |
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80 #include "errwarn.h" |
529 | 81 #include "input.h" |
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82 #include "ovl.h" |
2370 | 83 #include "ov.h" |
3234 | 84 #include "pager.h" |
6419 | 85 #include "parse.h" |
5770 | 86 #include "sighandlers.h" |
1352 | 87 #include "sysdep.h" |
1755 | 88 #include "toplev.h" |
529 | 89 #include "utils.h" |
6598 | 90 #include "file-stat.h" |
529 | 91 |
92 #ifndef STDIN_FILENO | |
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93 # define STDIN_FILENO 1 |
529 | 94 #endif |
444 | 95 |
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96 #if defined (__386BSD__) || defined (__FreeBSD__) || defined (__NetBSD__) |
2508 | 97 static void |
98 BSD_init (void) | |
99 { | |
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100 # if defined (HAVE_FLOATINGPOINT_H) |
2508 | 101 // Disable trapping on common exceptions. |
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102 # ifndef FP_X_DNML |
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103 # define FP_X_DNML 0 |
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104 # endif |
2508 | 105 fpsetmask (~(FP_X_OFL|FP_X_INV|FP_X_DZ|FP_X_DNML|FP_X_UFL|FP_X_IMP)); |
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106 # endif |
2508 | 107 } |
108 #endif | |
109 | |
6956 | 110 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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111 |
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112 #define WIN32_LEAN_AND_MEAN |
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113 #include <tlhelp32.h> |
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114 #include <windows.h> |
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115 |
6080 | 116 static void |
117 w32_set_octave_home (void) | |
118 { | |
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119 std::string bin_dir; |
6080 | 120 |
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121 HANDLE h = CreateToolhelp32Snapshot (TH32CS_SNAPMODULE |
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122 #ifdef TH32CS_SNAPMODULE32 |
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123 | TH32CS_SNAPMODULE32 |
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124 #endif |
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125 , 0); |
6080 | 126 |
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127 if (h != INVALID_HANDLE_VALUE) |
6080 | 128 { |
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129 MODULEENTRY32 mod_info; |
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130 |
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131 ZeroMemory (&mod_info, sizeof (mod_info)); |
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132 mod_info.dwSize = sizeof (mod_info); |
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133 |
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134 if (Module32First (h, &mod_info)) |
14445 | 135 { |
136 do | |
137 { | |
138 std::string mod_name (mod_info.szModule); | |
6080 | 139 |
14445 | 140 if (mod_name.find ("octinterp") != std::string::npos) |
141 { | |
142 bin_dir = mod_info.szExePath; | |
143 if (bin_dir[bin_dir.length () - 1] != '\\') | |
144 bin_dir.append (1, '\\'); | |
145 break; | |
146 } | |
147 } | |
148 while (Module32Next (h, &mod_info)); | |
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149 } |
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150 |
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151 CloseHandle (h); |
6080 | 152 } |
153 | |
154 if (! bin_dir.empty ()) | |
155 { | |
156 size_t pos = bin_dir.rfind ("\\bin\\"); | |
157 | |
8021 | 158 if (pos != std::string::npos) |
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159 octave_env::putenv ("OCTAVE_HOME", bin_dir.substr (0, pos)); |
6080 | 160 } |
161 } | |
162 | |
6960 | 163 void |
5451 | 164 w32_set_quiet_shutdown (void) |
165 { | |
166 // Let the user close the console window or shutdown without the | |
167 // pesky dialog. | |
168 // | |
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169 // FIXME: should this be user configurable? |
5451 | 170 SetProcessShutdownParameters (0x280, SHUTDOWN_NORETRY); |
171 } | |
172 | |
6960 | 173 void |
5451 | 174 MINGW_signal_cleanup (void) |
175 { | |
5455 | 176 w32_set_quiet_shutdown (); |
5451 | 177 } |
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178 |
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179 static void |
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180 w32_init (void) |
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181 { |
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182 w32_set_octave_home (); |
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183 |
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184 command_editor::prefer_env_winsize (true); |
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185 } |
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186 |
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187 static bool |
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188 w32_shell_execute (const std::string& file) |
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189 { |
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190 } |
5451 | 191 #endif |
192 | |
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193 DEFUN (__open_with_system_app__, args, , |
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194 "-*- texinfo -*-\n\ |
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195 @deftypefn {} {} __open_with_system_app__ (@var{file})\n\ |
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196 Undocumented internal function.\n\ |
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197 @end deftypefn") |
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198 { |
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199 if (args.length () != 1) |
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200 print_usage (); |
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201 |
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202 std::string file = args(0).xstring_value ("__open_with_system_app__: argument must be a filename"); |
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203 |
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204 octave_value retval; |
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205 |
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206 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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207 HINSTANCE status = ShellExecute (0, 0, file.c_str (), 0, 0, |
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208 SW_SHOWNORMAL); |
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209 |
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210 // ShellExecute returns a value greater than 32 if successful. |
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211 retval = (reinterpret_cast<ptrdiff_t> (status) > 32); |
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212 #elif defined (__APPLE__) |
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213 octave_value_list tmp |
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214 = Fsystem (ovl ("open " + file + " 2> /dev/null", |
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215 false, "async"), |
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216 1); |
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217 |
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218 retval = (tmp(0).double_value () == 0); |
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219 #else |
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220 octave_value_list tmp |
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221 = Fsystem (ovl ("xdg-open " + file + " 2> /dev/null", |
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222 false, "async"), |
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223 1); |
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224 |
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225 retval = (tmp(0).double_value () == 0); |
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226 #endif |
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227 |
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228 return retval; |
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229 } |
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230 |
5451 | 231 #if defined (__MINGW32__) |
232 static void | |
233 MINGW_init (void) | |
234 { | |
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235 w32_init (); |
5451 | 236 } |
237 #endif | |
238 | |
6080 | 239 #if defined (_MSC_VER) |
240 static void | |
241 MSVC_init (void) | |
242 { | |
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243 w32_init (); |
6080 | 244 } |
245 #endif | |
246 | |
4091 | 247 |
6598 | 248 // Return TRUE if FILE1 and FILE2 refer to the same (physical) file. |
249 | |
250 bool | |
251 same_file_internal (const std::string& file1, const std::string& file2) | |
252 { | |
253 #ifdef OCTAVE_USE_WINDOWS_API | |
254 | |
6691 | 255 bool retval = false; |
256 | |
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257 const char *f1 = file1.c_str (); |
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258 const char *f2 = file2.c_str (); |
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259 |
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260 bool f1_is_dir = GetFileAttributes (f1) & FILE_ATTRIBUTE_DIRECTORY; |
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261 bool f2_is_dir = GetFileAttributes (f2) & FILE_ATTRIBUTE_DIRECTORY; |
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262 |
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263 // Windows native code |
6598 | 264 // Reference: http://msdn2.microsoft.com/en-us/library/aa363788.aspx |
265 | |
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266 DWORD share = FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE; |
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267 |
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268 HANDLE hfile1 |
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269 = CreateFile (f1, 0, share, 0, OPEN_EXISTING, |
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270 f1_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); |
6691 | 271 |
272 if (hfile1 != INVALID_HANDLE_VALUE) | |
273 { | |
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274 HANDLE hfile2 |
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275 = CreateFile (f2, 0, share, 0, OPEN_EXISTING, |
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276 f2_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); |
6598 | 277 |
6691 | 278 if (hfile2 != INVALID_HANDLE_VALUE) |
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279 { |
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280 BY_HANDLE_FILE_INFORMATION hfi1; |
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281 BY_HANDLE_FILE_INFORMATION hfi2; |
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282 |
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283 if (GetFileInformationByHandle (hfile1, &hfi1) |
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284 && GetFileInformationByHandle (hfile2, &hfi2)) |
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285 { |
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286 retval = (hfi1.dwVolumeSerialNumber == hfi2.dwVolumeSerialNumber |
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287 && hfi1.nFileIndexHigh == hfi2.nFileIndexHigh |
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288 && hfi1.nFileIndexLow == hfi2.nFileIndexLow); |
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289 } |
6598 | 290 |
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291 CloseHandle (hfile2); |
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292 } |
6691 | 293 |
6598 | 294 CloseHandle (hfile1); |
295 } | |
6691 | 296 |
297 return retval; | |
6598 | 298 |
299 #else | |
300 | |
301 // POSIX Code | |
302 | |
303 file_stat fs_file1 (file1); | |
304 file_stat fs_file2 (file2); | |
305 | |
306 return (fs_file1 && fs_file2 | |
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307 && fs_file1.ino () == fs_file2.ino () |
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308 && fs_file1.dev () == fs_file2.dev ()); |
6598 | 309 |
310 #endif | |
311 } | |
312 | |
1 | 313 void |
314 sysdep_init (void) | |
315 { | |
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316 #if defined (HAVE_OMP_GET_NUM_THREADS) |
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317 omp_get_num_threads (); |
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318 #endif |
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319 |
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320 #if defined (__386BSD__) || defined (__FreeBSD__) || defined (__NetBSD__) |
2508 | 321 BSD_init (); |
5451 | 322 #elif defined (__MINGW32__) |
323 MINGW_init (); | |
6080 | 324 #elif defined (_MSC_VER) |
325 MSVC_init (); | |
1 | 326 #endif |
327 } | |
328 | |
5451 | 329 void |
330 sysdep_cleanup (void) | |
331 { | |
332 MINGW_SIGNAL_CLEANUP (); | |
333 } | |
334 | |
767 | 335 // Set terminal in raw mode. From less-177. |
336 // | |
337 // Change terminal to "raw mode", or restore to "normal" mode. | |
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338 // "Raw mode" means |
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339 // 1. An outstanding read will complete on receipt of a single keystroke. |
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340 // 2. Input is not echoed. |
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341 // 3. On output, \n is mapped to \r\n. |
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342 // 4. \t is NOT expanded into spaces. |
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343 // 5. Signal-causing characters such as ctrl-C (interrupt), |
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344 // etc. are NOT disabled. |
767 | 345 // It doesn't matter whether an input \n is mapped to \r, or vice versa. |
346 | |
529 | 347 void |
3657 | 348 raw_mode (bool on, bool wait) |
529 | 349 { |
3657 | 350 static bool curr_on = false; |
529 | 351 |
352 int tty_fd = STDIN_FILENO; | |
14160 | 353 if (! gnulib::isatty (tty_fd)) |
529 | 354 { |
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355 if (interactive && ! forced_interactive) |
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356 error ("stdin is not a tty!"); |
529 | 357 } |
358 | |
359 if (on == curr_on) | |
360 return; | |
361 | |
362 #if defined (HAVE_TERMIOS_H) | |
363 { | |
364 struct termios s; | |
365 static struct termios save_term; | |
366 | |
367 if (on) | |
368 { | |
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369 // Get terminal modes. |
529 | 370 |
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371 tcgetattr (tty_fd, &s); |
529 | 372 |
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373 // Save modes and set certain variables dependent on modes. |
529 | 374 |
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375 save_term = s; |
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376 // ospeed = s.c_cflag & CBAUD; |
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377 // erase_char = s.c_cc[VERASE]; |
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378 // kill_char = s.c_cc[VKILL]; |
529 | 379 |
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380 // Set the modes to the way we want them. |
529 | 381 |
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382 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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383 s.c_oflag |= (OPOST|ONLCR); |
529 | 384 #if defined (OCRNL) |
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385 s.c_oflag &= ~(OCRNL); |
529 | 386 #endif |
387 #if defined (ONOCR) | |
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388 s.c_oflag &= ~(ONOCR); |
529 | 389 #endif |
390 #if defined (ONLRET) | |
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391 s.c_oflag &= ~(ONLRET); |
529 | 392 #endif |
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393 s.c_cc[VMIN] = wait ? 1 : 0; |
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394 s.c_cc[VTIME] = 0; |
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395 } |
529 | 396 else |
397 { | |
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398 // Restore saved modes. |
1358 | 399 |
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400 s = save_term; |
529 | 401 } |
3658 | 402 |
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403 tcsetattr (tty_fd, wait ? TCSAFLUSH : TCSADRAIN, &s); |
529 | 404 } |
405 #elif defined (HAVE_TERMIO_H) | |
406 { | |
407 struct termio s; | |
408 static struct termio save_term; | |
409 | |
410 if (on) | |
411 { | |
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412 // Get terminal modes. |
529 | 413 |
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414 ioctl (tty_fd, TCGETA, &s); |
529 | 415 |
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416 // Save modes and set certain variables dependent on modes. |
529 | 417 |
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418 save_term = s; |
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419 // ospeed = s.c_cflag & CBAUD; |
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420 // erase_char = s.c_cc[VERASE]; |
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421 // kill_char = s.c_cc[VKILL]; |
529 | 422 |
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423 // Set the modes to the way we want them. |
529 | 424 |
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425 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); |
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426 s.c_oflag |= (OPOST|ONLCR); |
529 | 427 #if defined (OCRNL) |
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428 s.c_oflag &= ~(OCRNL); |
529 | 429 #endif |
430 #if defined (ONOCR) | |
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431 s.c_oflag &= ~(ONOCR); |
529 | 432 #endif |
433 #if defined (ONLRET) | |
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434 s.c_oflag &= ~(ONLRET); |
529 | 435 #endif |
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436 s.c_cc[VMIN] = wait ? 1 : 0; |
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437 } |
529 | 438 else |
439 { | |
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440 // Restore saved modes. |
1358 | 441 |
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442 s = save_term; |
529 | 443 } |
3658 | 444 |
529 | 445 ioctl (tty_fd, TCSETAW, &s); |
446 } | |
447 #elif defined (HAVE_SGTTY_H) | |
448 { | |
449 struct sgttyb s; | |
450 static struct sgttyb save_term; | |
451 | |
452 if (on) | |
453 { | |
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454 // Get terminal modes. |
529 | 455 |
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456 ioctl (tty_fd, TIOCGETP, &s); |
529 | 457 |
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458 // Save modes and set certain variables dependent on modes. |
529 | 459 |
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460 save_term = s; |
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461 // ospeed = s.sg_ospeed; |
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462 // erase_char = s.sg_erase; |
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463 // kill_char = s.sg_kill; |
529 | 464 |
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465 // Set the modes to the way we want them. |
529 | 466 |
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467 s.sg_flags |= CBREAK; |
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468 s.sg_flags &= ~(ECHO); |
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469 } |
529 | 470 else |
471 { | |
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472 // Restore saved modes. |
1358 | 473 |
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474 s = save_term; |
529 | 475 } |
3658 | 476 |
529 | 477 ioctl (tty_fd, TIOCSETN, &s); |
478 } | |
479 #else | |
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480 warn_disabled_feature ("", "raw mode console I/O"); |
4064 | 481 |
482 // Make sure the current mode doesn't toggle. | |
483 on = curr_on; | |
529 | 484 #endif |
485 | |
486 curr_on = on; | |
487 } | |
488 | |
6726 | 489 FILE * |
490 octave_popen (const char *command, const char *mode) | |
491 { | |
492 #if defined (__MINGW32__) || defined (_MSC_VER) | |
493 if (mode && mode[0] && ! mode[1]) | |
494 { | |
495 char tmode[3]; | |
496 tmode[0] = mode[0]; | |
497 tmode[1] = 'b'; | |
498 tmode[2] = 0; | |
499 | |
500 return _popen (command, tmode); | |
501 } | |
502 else | |
503 return _popen (command, mode); | |
504 #else | |
505 return popen (command, mode); | |
506 #endif | |
507 } | |
508 | |
509 int | |
510 octave_pclose (FILE *f) | |
511 { | |
512 #if defined (__MINGW32__) || defined (_MSC_VER) | |
513 return _pclose (f); | |
514 #else | |
515 return pclose (f); | |
516 #endif | |
517 } | |
518 | |
767 | 519 // Read one character from the terminal. |
520 | |
529 | 521 int |
4067 | 522 octave_kbhit (bool wait) |
529 | 523 { |
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524 #if defined (HAVE__KBHIT) && defined (HAVE__GETCH) |
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525 // This essentially means we are on a Windows system. |
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526 int c; |
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527 |
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528 if (wait) |
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529 c = _getch (); |
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530 else |
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531 c = (! _kbhit ()) ? 0 : _getch (); |
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532 |
4067 | 533 #else |
3658 | 534 raw_mode (true, wait); |
535 | |
5770 | 536 // Get current handler. |
537 octave_interrupt_handler saved_interrupt_handler | |
538 = octave_ignore_interrupts (); | |
539 | |
540 // Restore it, disabling system call restarts (if possible) so the | |
541 // read can be interrupted. | |
542 | |
543 octave_set_interrupt_handler (saved_interrupt_handler, false); | |
544 | |
3658 | 545 int c = std::cin.get (); |
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546 |
3658 | 547 if (std::cin.fail () || std::cin.eof ()) |
548 std::cin.clear (); | |
549 | |
5770 | 550 // Restore it, enabling system call restarts (if possible). |
551 octave_set_interrupt_handler (saved_interrupt_handler, true); | |
552 | |
3658 | 553 raw_mode (false, true); |
4067 | 554 #endif |
3658 | 555 |
529 | 556 return c; |
557 } | |
558 | |
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559 std::string |
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560 get_P_tmpdir (void) |
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561 { |
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562 #if defined (__WIN32__) && ! defined (_POSIX_VERSION) |
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563 |
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564 std::string retval; |
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565 |
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566 #if defined (P_tmpdir) |
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567 retval = P_tmpdir; |
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568 #endif |
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569 |
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570 // Apparently some versions of MinGW and MSVC either don't define |
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571 // P_tmpdir, or they define it to a single backslash, neither of which |
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572 // is particularly helpful. |
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573 |
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574 if (retval.empty () || retval == "\\") |
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575 { |
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576 retval = octave_env::getenv ("TEMP"); |
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577 |
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578 if (retval.empty ()) |
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579 retval = octave_env::getenv ("TMP"); |
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580 |
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581 if (retval.empty ()) |
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582 retval = "c:\\temp"; |
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583 } |
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584 |
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585 return retval; |
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586 |
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587 #elif defined (P_tmpdir) |
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588 |
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589 return P_tmpdir; |
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590 |
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591 #else |
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592 |
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593 return "/tmp"; |
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594 |
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595 #endif |
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596 } |
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597 |
1957 | 598 DEFUN (clc, , , |
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599 "-*- texinfo -*-\n\ |
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600 @deftypefn {} {} clc ()\n\ |
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601 @deftypefnx {} {} home ()\n\ |
3332 | 602 Clear the terminal screen and move the cursor to the upper left corner.\n\ |
3333 | 603 @end deftypefn") |
529 | 604 { |
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605 bool skip_redisplay = true; |
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606 |
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607 command_editor::clear_screen (skip_redisplay); |
529 | 608 |
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609 return ovl (); |
529 | 610 } |
611 | |
549 | 612 DEFALIAS (home, clc); |
613 | |
1957 | 614 DEFUN (getenv, args, , |
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615 "-*- texinfo -*-\n\ |
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616 @deftypefn {} {} getenv (@var{var})\n\ |
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617 Return the value of the environment variable @var{var}.\n\ |
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618 \n\ |
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619 For example,\n\ |
3301 | 620 \n\ |
621 @example\n\ | |
622 getenv (\"PATH\")\n\ | |
623 @end example\n\ | |
624 \n\ | |
625 @noindent\n\ | |
626 returns a string containing the value of your path.\n\ | |
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627 @seealso{setenv, unsetenv}\n\ |
3301 | 628 @end deftypefn") |
529 | 629 { |
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630 if (args.length () != 1) |
5823 | 631 print_usage (); |
529 | 632 |
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633 std::string name = args(0).string_value (); |
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634 |
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635 return ovl (octave_env::getenv (name)); |
529 | 636 } |
637 | |
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638 /* |
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639 %!assert (ischar (getenv ("OCTAVE_HOME"))) |
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640 */ |
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641 |
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642 DEFUN (setenv, args, , |
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643 "-*- texinfo -*-\n\ |
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644 @deftypefn {} {} setenv (@var{var}, @var{value})\n\ |
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645 @deftypefnx {} {} setenv (@var{var})\n\ |
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646 @deftypefnx {} {} putenv (@dots{})\n\ |
3301 | 647 Set the value of the environment variable @var{var} to @var{value}.\n\ |
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648 \n\ |
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649 If no @var{value} is specified then the variable will be assigned the null\n\ |
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650 string.\n\ |
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651 @seealso{unsetenv, getenv}\n\ |
3301 | 652 @end deftypefn") |
1706 | 653 { |
654 int nargin = args.length (); | |
655 | |
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656 if (nargin < 1 || nargin > 2) |
5823 | 657 print_usage (); |
1706 | 658 |
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659 std::string var = args(0).xstring_value ("setenv: VAR must be a string"); |
1706 | 660 |
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661 std::string val = (nargin == 2 |
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662 ? args(1).xstring_value ("setenv: VALUE must be a string") |
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663 : ""); |
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664 |
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665 octave_env::putenv (var, val); |
1706 | 666 |
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667 return ovl (); |
1706 | 668 } |
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669 |
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670 DEFALIAS (putenv, setenv); |
1706 | 671 |
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672 /* |
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673 %!test |
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674 %! setenv ("dummy_variable_that_cannot_matter", "foobar"); |
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675 %! assert (getenv ("dummy_variable_that_cannot_matter"), "foobar"); |
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676 %! unsetenv ("dummy_variable_that_cannot_matter"); |
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677 %! assert (getenv ("dummy_variable_that_cannot_matter"), ""); |
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678 */ |
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679 |
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680 DEFUN (unsetenv, args, , |
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681 "-*- texinfo -*-\n\ |
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682 @deftypefn {} {@var{status} =} unsetenv (@var{var})\n\ |
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683 Delete the environment variable @var{var}.\n\ |
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684 \n\ |
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685 Return 0 if the variable was deleted, or did not exist, and -1 if an error\n\ |
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686 occurred.\n\ |
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687 @seealso{setenv, getenv}\n\ |
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688 @end deftypefn") |
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689 { |
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690 if (args.length () != 1) |
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691 print_usage (); |
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692 |
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693 std::string tmp = args(0).string_value (); |
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694 |
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695 return ovl (gnulib::unsetenv (tmp.c_str ())); |
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696 } |
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697 |
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698 /* |
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699 ## Test for unsetenv is in setenv test |
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700 */ |
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701 |
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702 // FIXME: perhaps kbhit should also be able to print a prompt? |
3372 | 703 |
3657 | 704 DEFUN (kbhit, args, , |
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705 "-*- texinfo -*-\n\ |
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706 @deftypefn {} {} kbhit ()\n\ |
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707 @deftypefnx {} {} kbhit (1)\n\ |
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708 Read a single keystroke from the keyboard.\n\ |
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709 \n\ |
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710 If called with an argument, don't wait for a keypress.\n\ |
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711 \n\ |
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712 For example,\n\ |
3372 | 713 \n\ |
714 @example\n\ | |
715 x = kbhit ();\n\ | |
716 @end example\n\ | |
717 \n\ | |
718 @noindent\n\ | |
719 will set @var{x} to the next character typed at the keyboard as soon as\n\ | |
720 it is typed.\n\ | |
3657 | 721 \n\ |
722 @example\n\ | |
723 x = kbhit (1);\n\ | |
724 @end example\n\ | |
725 \n\ | |
726 @noindent\n\ | |
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727 is identical to the above example, but doesn't wait for a keypress,\n\ |
3657 | 728 returning the empty string if no key is available.\n\ |
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729 @seealso{input, pause}\n\ |
3372 | 730 @end deftypefn") |
529 | 731 { |
4233 | 732 octave_value retval; |
529 | 733 |
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734 // FIXME: add timeout and default value args? |
529 | 735 |
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736 if (interactive) |
529 | 737 { |
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738 Fdrawnow (); |
6423 | 739 |
4067 | 740 int c = octave_kbhit (args.length () == 0); |
3657 | 741 |
3658 | 742 if (c == -1) |
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743 c = 0; |
3657 | 744 |
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745 char s[2] = { static_cast<char> (c), '\0' }; |
16015 | 746 |
529 | 747 retval = s; |
748 } | |
749 | |
750 return retval; | |
751 } | |
752 | |
1957 | 753 DEFUN (pause, args, , |
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754 "-*- texinfo -*-\n\ |
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755 @deftypefn {} {} pause ()\n\ |
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756 @deftypefnx {} {} pause (@var{n})\n\ |
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757 Suspend the execution of the program for @var{n} seconds.\n\ |
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758 \n\ |
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759 If invoked without an input arguments then the program is suspended until a\n\ |
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760 character is typed.\n\ |
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761 \n\ |
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762 @var{n} is a positive real value and may be a fraction of a second,\n\ |
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763 for example:\n\ |
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764 \n\ |
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765 @example\n\ |
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766 @group\n\ |
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767 tic; pause (0.05); toc\n\ |
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768 @print{} Elapsed time is 0.05039 seconds.\n\ |
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769 @end group\n\ |
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770 @end example\n\ |
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771 \n\ |
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772 The following example prints a message and then waits 5 seconds before\n\ |
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773 clearing the screen.\n\ |
3301 | 774 \n\ |
775 @example\n\ | |
776 @group\n\ | |
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777 disp (\"wait please...\");\n\ |
3301 | 778 pause (5);\n\ |
779 clc;\n\ | |
780 @end group\n\ | |
781 @end example\n\ | |
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782 \n\ |
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783 @seealso{kbhit}\n\ |
3301 | 784 @end deftypefn") |
529 | 785 { |
786 int nargin = args.length (); | |
787 | |
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788 if (nargin > 1) |
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789 print_usage (); |
529 | 790 |
1579 | 791 if (nargin == 1) |
529 | 792 { |
1579 | 793 double dval = args(0).double_value (); |
636 | 794 |
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795 if (xisnan (dval)) |
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796 warning ("pause: NaN is an invalid delay"); |
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797 else |
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798 { |
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799 Fdrawnow (); |
6419 | 800 |
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801 if (xisinf (dval)) |
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802 { |
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803 flush_octave_stdout (); |
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804 octave_kbhit (); |
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805 } |
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806 else |
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807 octave_sleep (dval); |
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808 } |
529 | 809 } |
1579 | 810 else |
3234 | 811 { |
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812 Fdrawnow (); |
3234 | 813 flush_octave_stdout (); |
4067 | 814 octave_kbhit (); |
3234 | 815 } |
2630 | 816 |
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817 return ovl (); |
2630 | 818 } |
819 | |
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820 /* |
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821 %!test |
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822 %! pause (1); |
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823 |
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824 %!error (pause (1, 2)) |
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825 */ |
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826 |
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827 // FIXME: maybe this should only return 1 if IEEE floating |
862 | 828 // point functions really work. |
829 | |
1957 | 830 DEFUN (isieee, , , |
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831 "-*- texinfo -*-\n\ |
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832 @deftypefn {} {} isieee ()\n\ |
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833 Return true if your computer @emph{claims} to conform to the IEEE standard\n\ |
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834 for floating point calculations.\n\ |
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835 \n\ |
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836 No actual tests are performed.\n\ |
3301 | 837 @end deftypefn") |
862 | 838 { |
4600 | 839 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); |
2317 | 840 |
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841 return ovl (flt_fmt == oct_mach_info::flt_fmt_ieee_little_endian |
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842 || flt_fmt == oct_mach_info::flt_fmt_ieee_big_endian); |
862 | 843 } |
844 | |
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845 /* |
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846 %!assert (islogical (isieee ())) |
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847 */ |
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848 |
4600 | 849 DEFUN (native_float_format, , , |
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850 "-*- texinfo -*-\n\ |
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851 @deftypefn {} {} native_float_format ()\n\ |
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852 Return the native floating point format as a string.\n\ |
4600 | 853 @end deftypefn") |
854 { | |
855 oct_mach_info::float_format flt_fmt = oct_mach_info::native_float_format (); | |
856 | |
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857 return ovl (oct_mach_info::float_format_as_string (flt_fmt)); |
4600 | 858 } |
859 | |
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860 /* |
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861 %!assert (ischar (native_float_format ())) |
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862 */ |
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863 |
1957 | 864 DEFUN (tilde_expand, args, , |
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865 "-*- texinfo -*-\n\ |
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866 @deftypefn {} {} tilde_expand (@var{string})\n\ |
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867 @deftypefnx {} {} tilde_expand (@var{cellstr})\n\ |
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868 Perform tilde expansion on @var{string}.\n\ |
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869 \n\ |
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870 If @var{string} begins with a tilde character, (@samp{~}), all of the\n\ |
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871 characters preceding the first slash (or all characters, if there is no\n\ |
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872 slash) are treated as a possible user name, and the tilde and the following\n\ |
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873 characters up to the slash are replaced by the home directory of the named\n\ |
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874 user. If the tilde is followed immediately by a slash, the tilde is\n\ |
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875 replaced by the home directory of the user running Octave.\n\ |
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876 \n\ |
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877 If the input is a cell array of strings @var{cellstr} then tilde expansion\n\ |
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878 is performed on each string element.\n\ |
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879 \n\ |
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880 Examples:\n\ |
3301 | 881 \n\ |
882 @example\n\ | |
883 @group\n\ | |
884 tilde_expand (\"~joeuser/bin\")\n\ | |
885 @result{} \"/home/joeuser/bin\"\n\ | |
886 tilde_expand (\"~/bin\")\n\ | |
887 @result{} \"/home/jwe/bin\"\n\ | |
888 @end group\n\ | |
889 @end example\n\ | |
890 @end deftypefn") | |
1750 | 891 { |
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892 if (args.length () != 1) |
5823 | 893 print_usage (); |
1750 | 894 |
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895 octave_value arg = args(0); |
6116 | 896 |
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897 string_vector sv = arg.xstring_vector_value ("tilde_expand: argument must be char or cellstr object"); |
6116 | 898 |
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899 sv = file_ops::tilde_expand (sv); |
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900 |
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901 if (arg.is_cellstr ()) |
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902 return ovl (Cell (arg.dims (), sv)); |
1750 | 903 else |
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904 return ovl (sv); |
1750 | 905 } |
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906 |
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907 /* |
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908 %!test |
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909 %! home = get_home_directory (); |
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910 %! assert (tilde_expand ("~/foobar"), [home "/foobar"]); |
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911 %! assert (tilde_expand ("/foo/bar"), "/foo/bar"); |
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912 %! assert (tilde_expand ("foo/bar"), "foo/bar"); |
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913 */ |
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914 |
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915 DEFUN (get_home_directory, , , |
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916 "-*- texinfo -*-\n\ |
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917 @deftypefn {} {@var{homedir} =} get_home_directory ()\n\ |
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918 Return the current home directory.\n\ |
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919 \n\ |
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920 On most systems, this is equivalent to @code{getenv (\"HOME\")}. On Windows\n\ |
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921 systems, if the environment variable @env{HOME} is not set then it is\n\ |
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922 equivalent to\n\ |
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923 @code{fullfile (getenv (\"HOMEDRIVE\"), getenv (\"HOMEPATH\"))}\n\ |
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924 @seealso{getenv}\n\ |
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925 @end deftypefn") |
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926 { |
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927 return ovl (octave_env::get_home_directory ()); |
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928 } |
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929 |
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930 /* |
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931 %!test |
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932 %! if (! ispc ()) |
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933 %! assert (get_home_directory (), getenv ("HOME")); |
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934 %! endif |
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935 */ |
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936 |
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937 // This function really belongs in display.cc, but including defun.h in |
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938 // that file results in conflicts with symbols from headers that are |
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939 // needed for X11 and Carbon functions. |
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940 |
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941 DEFUN (have_window_system, , , |
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942 "-*- texinfo -*-\n\ |
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943 @deftypefn {} {} have_window_system ()\n\ |
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944 Return true if a window system is available (X11, Windows, or Apple OS X)\n\ |
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945 and false otherwise.\n\ |
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946 @seealso{isguirunning}\n\ |
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947 @end deftypefn") |
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948 { |
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949 return ovl (display_info::display_available ()); |
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950 } |