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annotate src/file-io.cc @ 11572:7d6d8c1e471f
Grammarcheck Texinfo for files in src directory.
author | Rik <octave@nomad.inbox5.com> |
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date | Wed, 19 Jan 2011 17:51:22 -0800 |
parents | 57632dea2446 |
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rev | line source |
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1 | 1 /* |
2 | |
11523 | 3 Copyright (C) 1993-2011 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 | |
2095 | 23 // Originally written by John C. Campbell <jcc@bevo.che.wisc.edu> |
1230 | 24 // |
2095 | 25 // Thomas Baier <baier@ci.tuwien.ac.at> added the original versions of |
26 // the following functions: | |
1230 | 27 // |
2095 | 28 // popen |
29 // pclose | |
30 // execute (now popen2.m) | |
31 // sync_system (now merged with system) | |
32 // async_system (now merged with system) | |
1230 | 33 |
9322 | 34 // Extensively revised by John W. Eaton <jwe@octave.org>, |
2095 | 35 // April 1996. |
1 | 36 |
240 | 37 #ifdef HAVE_CONFIG_H |
1230 | 38 #include <config.h> |
1 | 39 #endif |
40 | |
4797 | 41 #include <cerrno> |
2095 | 42 #include <climits> |
4797 | 43 #include <cstdio> |
1343 | 44 |
3503 | 45 #include <iostream> |
7336 | 46 #include <stack> |
4726 | 47 #include <vector> |
1350 | 48 |
1230 | 49 #include <sys/types.h> |
1 | 50 #include <unistd.h> |
1350 | 51 |
5325 | 52 #ifdef HAVE_ZLIB_H |
53 #include <zlib.h> | |
54 #endif | |
55 | |
5102 | 56 #include "error.h" |
2926 | 57 #include "file-ops.h" |
6159 | 58 #include "file-stat.h" |
5102 | 59 #include "lo-ieee.h" |
6159 | 60 #include "oct-env.h" |
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61 #include "oct-locbuf.h" |
2926 | 62 |
1352 | 63 #include "defun.h" |
6108 | 64 #include "file-io.h" |
6159 | 65 #include "load-path.h" |
2095 | 66 #include "oct-fstrm.h" |
67 #include "oct-iostrm.h" | |
1377 | 68 #include "oct-map.h" |
1750 | 69 #include "oct-obj.h" |
2095 | 70 #include "oct-prcstrm.h" |
71 #include "oct-stream.h" | |
72 #include "oct-strstrm.h" | |
1 | 73 #include "pager.h" |
444 | 74 #include "sysdep.h" |
1352 | 75 #include "utils.h" |
2370 | 76 #include "variables.h" |
1583 | 77 |
2902 | 78 static octave_value stdin_file; |
79 static octave_value stdout_file; | |
80 static octave_value stderr_file; | |
81 | |
4468 | 82 static octave_stream stdin_stream; |
83 static octave_stream stdout_stream; | |
84 static octave_stream stderr_stream; | |
85 | |
1 | 86 void |
164 | 87 initialize_file_io (void) |
1 | 88 { |
4468 | 89 stdin_stream = octave_istream::create (&std::cin, "stdin"); |
2116 | 90 |
3531 | 91 // This uses octave_stdout (see pager.h), not std::cout so that Octave's |
2116 | 92 // standard output stream will pass through the pager. |
93 | |
4468 | 94 stdout_stream = octave_ostream::create (&octave_stdout, "stdout"); |
2116 | 95 |
4468 | 96 stderr_stream = octave_ostream::create (&std::cerr, "stderr"); |
1 | 97 |
2902 | 98 stdin_file = octave_stream_list::insert (stdin_stream); |
99 stdout_file = octave_stream_list::insert (stdout_stream); | |
100 stderr_file = octave_stream_list::insert (stderr_stream); | |
1 | 101 } |
102 | |
2095 | 103 void |
104 close_files (void) | |
1 | 105 { |
2095 | 106 octave_stream_list::clear (); |
107 } | |
636 | 108 |
5102 | 109 // List of files to delete when we exit or crash. |
110 // | |
5775 | 111 // FIXME -- this should really be static, but that causes |
5102 | 112 // problems on some systems. |
113 std::stack <std::string> tmp_files; | |
114 | |
115 void | |
116 mark_for_deletion (const std::string& file) | |
117 { | |
118 tmp_files.push (file); | |
119 } | |
120 | |
121 void | |
122 cleanup_tmp_files (void) | |
123 { | |
124 while (! tmp_files.empty ()) | |
125 { | |
126 std::string filename = tmp_files.top (); | |
127 tmp_files.pop (); | |
10411 | 128 gnulib::unlink (filename.c_str ()); |
5102 | 129 } |
130 } | |
131 | |
4036 | 132 static std::ios::openmode |
5325 | 133 fopen_mode_to_ios_mode (const std::string& mode_arg) |
1 | 134 { |
4036 | 135 std::ios::openmode retval = std::ios::in; |
896 | 136 |
5325 | 137 if (! mode_arg.empty ()) |
368 | 138 { |
2095 | 139 // Could probably be faster, but does it really matter? |
1766 | 140 |
5325 | 141 std::string mode = mode_arg; |
142 | |
7078 | 143 // 'W' and 'R' are accepted as 'w' and 'r', but we warn about |
144 // them because Matlab says they perform "automatic flushing" | |
145 // but we don't know precisely what action that implies. | |
146 | |
147 size_t pos = mode.find ('W'); | |
148 | |
8021 | 149 if (pos != std::string::npos) |
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150 { |
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151 warning ("fopen: treating mode \"W\" as equivalent to \"w\""); |
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152 mode[pos] = 'w'; |
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153 } |
7078 | 154 |
155 pos = mode.find ('R'); | |
156 | |
8021 | 157 if (pos != std::string::npos) |
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158 { |
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159 warning ("fopen: treating mode \"R\" as equivalent to \"r\""); |
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160 mode[pos] = 'r'; |
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161 } |
7078 | 162 |
163 pos = mode.find ('z'); | |
5325 | 164 |
8021 | 165 if (pos != std::string::npos) |
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166 { |
5325 | 167 #if defined (HAVE_ZLIB) |
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168 mode.erase (pos, 1); |
5325 | 169 #else |
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170 error ("this version of Octave does not support gzipped files"); |
5325 | 171 #endif |
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172 } |
5325 | 173 |
174 if (! error_state) | |
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175 { |
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176 if (mode == "rt") |
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177 retval = std::ios::in; |
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178 else if (mode == "wt") |
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179 retval = std::ios::out | std::ios::trunc; |
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180 else if (mode == "at") |
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181 retval = std::ios::out | std::ios::app; |
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182 else if (mode == "r+t" || mode == "rt+") |
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183 retval = std::ios::in | std::ios::out; |
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184 else if (mode == "w+t" || mode == "wt+") |
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185 retval = std::ios::in | std::ios::out | std::ios::trunc; |
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186 else if (mode == "a+t" || mode == "at+") |
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187 retval = std::ios::in | std::ios::out | std::ios::app; |
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188 else if (mode == "rb" || mode == "r") |
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189 retval = std::ios::in | std::ios::binary; |
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190 else if (mode == "wb" || mode == "w") |
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191 retval = std::ios::out | std::ios::trunc | std::ios::binary; |
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192 else if (mode == "ab" || mode == "a") |
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193 retval = std::ios::out | std::ios::app | std::ios::binary; |
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194 else if (mode == "r+b" || mode == "rb+" || mode == "r+") |
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195 retval = std::ios::in | std::ios::out | std::ios::binary; |
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196 else if (mode == "w+b" || mode == "wb+" || mode == "w+") |
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197 retval = (std::ios::in | std::ios::out | std::ios::trunc |
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198 | std::ios::binary); |
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199 else if (mode == "a+b" || mode == "ab+" || mode == "a+") |
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200 retval = (std::ios::in | std::ios::out | std::ios::app |
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201 | std::ios::binary); |
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202 else |
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203 ::error ("invalid mode specified"); |
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204 } |
1 | 205 } |
206 | |
207 return retval; | |
208 } | |
209 | |
1957 | 210 DEFUN (fclose, args, , |
3372 | 211 "-*- texinfo -*-\n\ |
212 @deftypefn {Built-in Function} {} fclose (@var{fid})\n\ | |
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213 Close the specified file. If successful, @code{fclose} returns 0,\n\ |
4594 | 214 otherwise, it returns -1.\n\ |
5642 | 215 @seealso{fopen, fseek, ftell}\n\ |
216 @end deftypefn") | |
529 | 217 { |
4233 | 218 octave_value retval = -1; |
529 | 219 |
220 int nargin = args.length (); | |
221 | |
2095 | 222 if (nargin == 1) |
4233 | 223 retval = octave_stream_list::remove (args(0), "fclose"); |
1 | 224 else |
5823 | 225 print_usage (); |
1 | 226 |
227 return retval; | |
228 } | |
229 | |
5144 | 230 DEFUN (fclear, args, , |
231 "-*- texinfo -*-\n\ | |
232 @deftypefn {Built-in Function} {} fclear (@var{fid})\n\ | |
233 Clear the stream state for the specified file.\n\ | |
234 @end deftypefn") | |
235 { | |
236 octave_value retval; | |
237 | |
238 int nargin = args.length (); | |
239 | |
240 if (nargin == 1) | |
241 { | |
242 int fid = octave_stream_list::get_file_number (args (0)); | |
243 | |
244 octave_stream os = octave_stream_list::lookup (fid, "fclear"); | |
245 | |
246 if (! error_state) | |
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247 os.clearerr (); |
5144 | 248 } |
249 else | |
5823 | 250 print_usage (); |
5144 | 251 |
252 return retval; | |
253 } | |
254 | |
1957 | 255 DEFUN (fflush, args, , |
3372 | 256 "-*- texinfo -*-\n\ |
257 @deftypefn {Built-in Function} {} fflush (@var{fid})\n\ | |
258 Flush output to @var{fid}. This is useful for ensuring that all\n\ | |
259 pending output makes it to the screen before some other event occurs.\n\ | |
260 For example, it is always a good idea to flush the standard output\n\ | |
261 stream before calling @code{input}.\n\ | |
5095 | 262 \n\ |
263 @code{fflush} returns 0 on success and an OS dependent error value\n\ | |
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264 (@minus{}1 on Unix) on error.\n\ |
5642 | 265 @seealso{fopen, fclose}\n\ |
266 @end deftypefn") | |
1181 | 267 { |
4233 | 268 octave_value retval = -1; |
1181 | 269 |
270 int nargin = args.length (); | |
271 | |
2095 | 272 if (nargin == 1) |
273 { | |
5775 | 274 // FIXME -- any way to avoid special case for stdout? |
2609 | 275 |
276 int fid = octave_stream_list::get_file_number (args (0)); | |
277 | |
278 if (fid == 1) | |
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279 { |
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280 flush_octave_stdout (); |
2095 | 281 |
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282 retval = 0; |
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283 } |
2095 | 284 else |
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285 { |
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286 octave_stream os = octave_stream_list::lookup (fid, "fflush"); |
2609 | 287 |
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288 if (! error_state) |
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289 retval = os.flush (); |
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290 } |
2095 | 291 } |
292 else | |
5823 | 293 print_usage (); |
1181 | 294 |
295 return retval; | |
296 } | |
297 | |
2095 | 298 DEFUN (fgetl, args, , |
3372 | 299 "-*- texinfo -*-\n\ |
300 @deftypefn {Built-in Function} {} fgetl (@var{fid}, @var{len})\n\ | |
301 Read characters from a file, stopping after a newline, or EOF,\n\ | |
302 or @var{len} characters have been read. The characters read, excluding\n\ | |
303 the possible trailing newline, are returned as a string.\n\ | |
1339 | 304 \n\ |
3372 | 305 If @var{len} is omitted, @code{fgetl} reads until the next newline\n\ |
306 character.\n\ | |
307 \n\ | |
308 If there are no more characters to read, @code{fgetl} returns @minus{}1.\n\ | |
5642 | 309 @seealso{fread, fscanf}\n\ |
310 @end deftypefn") | |
1339 | 311 { |
4468 | 312 static std::string who = "fgetl"; |
313 | |
2599 | 314 octave_value_list retval; |
315 | |
4233 | 316 retval(1) = 0; |
317 retval(0) = -1; | |
1339 | 318 |
319 int nargin = args.length (); | |
320 | |
321 if (nargin == 1 || nargin == 2) | |
2095 | 322 { |
4468 | 323 octave_stream os = octave_stream_list::lookup (args(0), who); |
2095 | 324 |
3341 | 325 if (! error_state) |
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326 { |
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327 octave_value len_arg = (nargin == 2) ? args(1) : octave_value (); |
2095 | 328 |
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329 bool err = false; |
2095 | 330 |
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331 std::string tmp = os.getl (len_arg, err, who); |
2095 | 332 |
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333 if (! (error_state || err)) |
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334 { |
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335 retval(1) = tmp.length (); |
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336 retval(0) = tmp; |
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337 } |
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338 } |
2095 | 339 } |
1339 | 340 else |
5823 | 341 print_usage (); |
1339 | 342 |
343 return retval; | |
344 } | |
345 | |
2095 | 346 DEFUN (fgets, args, , |
3372 | 347 "-*- texinfo -*-\n\ |
348 @deftypefn {Built-in Function} {} fgets (@var{fid}, @var{len})\n\ | |
349 Read characters from a file, stopping after a newline, or EOF,\n\ | |
350 or @var{len} characters have been read. The characters read, including\n\ | |
351 the possible trailing newline, are returned as a string.\n\ | |
529 | 352 \n\ |
3372 | 353 If @var{len} is omitted, @code{fgets} reads until the next newline\n\ |
354 character.\n\ | |
355 \n\ | |
356 If there are no more characters to read, @code{fgets} returns @minus{}1.\n\ | |
7781 | 357 @seealso{fputs, fopen, fread, fscanf}\n\ |
5642 | 358 @end deftypefn") |
529 | 359 { |
4468 | 360 static std::string who = "fgets"; |
361 | |
2599 | 362 octave_value_list retval; |
363 | |
364 retval(1) = 0.0; | |
365 retval(0) = -1.0; | |
529 | 366 |
367 int nargin = args.length (); | |
368 | |
1338 | 369 if (nargin == 1 || nargin == 2) |
2095 | 370 { |
4468 | 371 octave_stream os = octave_stream_list::lookup (args(0), who); |
2095 | 372 |
3341 | 373 if (! error_state) |
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374 { |
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375 octave_value len_arg = (nargin == 2) ? args(1) : octave_value (); |
2095 | 376 |
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377 bool err = false; |
2095 | 378 |
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379 std::string tmp = os.gets (len_arg, err, who); |
2095 | 380 |
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381 if (! (error_state || err)) |
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382 { |
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383 retval(1) = tmp.length (); |
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384 retval(0) = tmp; |
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385 } |
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386 } |
2095 | 387 } |
1338 | 388 else |
5823 | 389 print_usage (); |
529 | 390 |
391 return retval; | |
392 } | |
393 | |
9701 | 394 DEFUN (fskipl, args, , |
395 "-*- texinfo -*-\n\ | |
396 @deftypefn {Built-in Function} {} fskipl (@var{fid}, @var{count})\n\ | |
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397 Skip a given number of lines, i.e., discards characters until an end-of-line\n\ |
9701 | 398 is met exactly @var{count}-times, or end-of-file occurs.\n\ |
399 Returns the number of lines skipped (end-of-line sequences encountered).\n\ | |
400 If @var{count} is omitted, it defaults to 1. @var{count} may also be\n\ | |
401 @code{Inf}, in which case lines are skipped to the end of file.\n\ | |
402 This form is suitable for counting lines in a file.\n\ | |
403 @seealso{fgetl, fgets}\n\ | |
404 @end deftypefn") | |
405 { | |
406 static std::string who = "fskipl"; | |
407 | |
408 octave_value retval; | |
409 | |
410 int nargin = args.length (); | |
411 | |
412 if (nargin == 1 || nargin == 2) | |
413 { | |
414 octave_stream os = octave_stream_list::lookup (args(0), who); | |
415 | |
416 if (! error_state) | |
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417 { |
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418 octave_value count_arg = (nargin == 2) ? args(1) : octave_value (); |
9701 | 419 |
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420 bool err = false; |
9701 | 421 |
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422 long tmp = os.skipl (count_arg, err, who); |
9701 | 423 |
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424 if (! (error_state || err)) |
9701 | 425 retval = tmp; |
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426 } |
9701 | 427 } |
428 else | |
429 print_usage (); | |
430 | |
431 return retval; | |
432 } | |
433 | |
434 | |
3340 | 435 static octave_stream |
3523 | 436 do_stream_open (const std::string& name, const std::string& mode, |
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437 const std::string& arch, int& fid) |
1 | 438 { |
3340 | 439 octave_stream retval; |
1 | 440 |
2095 | 441 fid = -1; |
1 | 442 |
4036 | 443 std::ios::openmode md = fopen_mode_to_ios_mode (mode); |
1 | 444 |
2095 | 445 if (! error_state) |
446 { | |
2318 | 447 oct_mach_info::float_format flt_fmt = |
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448 oct_mach_info::string_to_float_format (arch); |
1 | 449 |
4798 | 450 if (! error_state) |
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451 { |
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452 std::string fname = file_ops::tilde_expand (name); |
6159 | 453 |
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454 file_stat fs (fname); |
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455 |
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456 if (! (md & std::ios::out |
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457 || octave_env::absolute_pathname (fname) |
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458 || octave_env::rooted_relative_pathname (fname))) |
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459 { |
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460 if (! fs.exists ()) |
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461 { |
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462 std::string tmp |
10250 | 463 = octave_env::make_absolute (load_path::find_file (fname)); |
6159 | 464 |
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465 if (! tmp.empty ()) |
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466 { |
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467 warning_with_id ("Octave:fopen-file-in-path", |
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468 "fopen: file found in load path"); |
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469 fname = tmp; |
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470 } |
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471 } |
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472 } |
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473 |
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474 if (! fs.is_dir ()) |
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475 { |
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476 std::string tmode = mode; |
6405 | 477 |
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478 // Use binary mode if 't' is not specified, but don't add |
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479 // 'b' if it is already present. |
6405 | 480 |
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481 size_t bpos = tmode.find ('b'); |
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482 size_t tpos = tmode.find ('t'); |
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483 |
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484 if (bpos == std::string::npos && tpos == std::string::npos) |
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485 tmode += 'b'; |
6405 | 486 |
6905 | 487 #if defined (HAVE_ZLIB) |
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488 size_t pos = tmode.find ('z'); |
4798 | 489 |
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490 if (pos != std::string::npos) |
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491 { |
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492 tmode.erase (pos, 1); |
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493 |
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494 FILE *fptr = ::fopen (fname.c_str (), tmode.c_str ()); |
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495 |
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496 int fd = fileno (fptr); |
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497 |
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498 gzFile gzf = ::gzdopen (fd, tmode.c_str ()); |
5325 | 499 |
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500 if (fptr) |
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501 retval = octave_zstdiostream::create (fname, gzf, fd, |
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502 md, flt_fmt); |
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503 else |
10411 | 504 retval.error (gnulib::strerror (errno)); |
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505 } |
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506 else |
5325 | 507 #endif |
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508 { |
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509 FILE *fptr = ::fopen (fname.c_str (), tmode.c_str ()); |
5325 | 510 |
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511 retval = octave_stdiostream::create (fname, fptr, md, flt_fmt); |
5370 | 512 |
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513 if (! fptr) |
10411 | 514 retval.error (gnulib::strerror (errno)); |
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515 } |
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516 |
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517 } |
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518 } |
1 | 519 } |
520 | |
2095 | 521 return retval; |
522 } | |
1 | 523 |
3340 | 524 static octave_stream |
2095 | 525 do_stream_open (const octave_value& tc_name, const octave_value& tc_mode, |
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526 const octave_value& tc_arch, const char *fcn, int& fid) |
2095 | 527 { |
3340 | 528 octave_stream retval; |
2095 | 529 |
530 fid = -1; | |
531 | |
3523 | 532 std::string name = tc_name.string_value (); |
2095 | 533 |
534 if (! error_state) | |
1 | 535 { |
3523 | 536 std::string mode = tc_mode.string_value (); |
2095 | 537 |
538 if (! error_state) | |
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539 { |
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540 std::string arch = tc_arch.string_value (); |
1 | 541 |
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542 if (! error_state) |
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543 retval = do_stream_open (name, mode, arch, fid); |
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544 else |
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545 ::error ("%s: architecture type must be a string", fcn); |
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546 } |
2095 | 547 else |
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548 ::error ("%s: file mode must be a string", fcn); |
1 | 549 } |
2095 | 550 else |
551 ::error ("%s: file name must be a string", fcn); | |
1 | 552 |
553 return retval; | |
554 } | |
555 | |
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556 DEFUN (fopen, args, nargout, |
3372 | 557 "-*- texinfo -*-\n\ |
10840 | 558 @deftypefn {Built-in Function} {[@var{fid}, @var{msg}] =} fopen (@var{name}, @var{mode}, @var{arch})\n\ |
3372 | 559 @deftypefnx {Built-in Function} {@var{fid_list} =} fopen (\"all\")\n\ |
5353 | 560 @deftypefnx {Built-in Function} {[@var{file}, @var{mode}, @var{arch}] =} fopen (@var{fid})\n\ |
3372 | 561 The first form of the @code{fopen} function opens the named file with\n\ |
562 the specified mode (read-write, read-only, etc.) and architecture\n\ | |
563 interpretation (IEEE big endian, IEEE little endian, etc.), and returns\n\ | |
564 an integer value that may be used to refer to the file later. If an\n\ | |
565 error occurs, @var{fid} is set to @minus{}1 and @var{msg} contains the\n\ | |
566 corresponding system error message. The @var{mode} is a one or two\n\ | |
567 character string that specifies whether the file is to be opened for\n\ | |
568 reading, writing, or both.\n\ | |
1181 | 569 \n\ |
3372 | 570 The second form of the @code{fopen} function returns a vector of file ids\n\ |
571 corresponding to all the currently open files, excluding the\n\ | |
572 @code{stdin}, @code{stdout}, and @code{stderr} streams.\n\ | |
2318 | 573 \n\ |
5353 | 574 The third form of the @code{fopen} function returns information about the\n\ |
575 open file given its file id.\n\ | |
1181 | 576 \n\ |
3372 | 577 For example,\n\ |
578 \n\ | |
579 @example\n\ | |
580 myfile = fopen (\"splat.dat\", \"r\", \"ieee-le\");\n\ | |
581 @end example\n\ | |
2095 | 582 \n\ |
3372 | 583 @noindent\n\ |
584 opens the file @file{splat.dat} for reading. If necessary, binary\n\ | |
585 numeric values will be read assuming they are stored in IEEE format with\n\ | |
586 the least significant bit first, and then converted to the native\n\ | |
587 representation.\n\ | |
2318 | 588 \n\ |
3372 | 589 Opening a file that is already open simply opens it again and returns a\n\ |
590 separate file id. It is not an error to open a file several times,\n\ | |
591 though writing to the same file through several different file ids may\n\ | |
592 produce unexpected results.\n\ | |
593 \n\ | |
594 The possible values @samp{mode} may have are\n\ | |
595 \n\ | |
596 @table @asis\n\ | |
597 @item @samp{r}\n\ | |
598 Open a file for reading.\n\ | |
3263 | 599 \n\ |
3372 | 600 @item @samp{w}\n\ |
7001 | 601 Open a file for writing. The previous contents are discarded.\n\ |
3372 | 602 \n\ |
603 @item @samp{a}\n\ | |
604 Open or create a file for writing at the end of the file.\n\ | |
605 \n\ | |
606 @item @samp{r+}\n\ | |
607 Open an existing file for reading and writing.\n\ | |
608 \n\ | |
609 @item @samp{w+}\n\ | |
610 Open a file for reading or writing. The previous contents are\n\ | |
611 discarded.\n\ | |
612 \n\ | |
613 @item @samp{a+}\n\ | |
614 Open or create a file for reading or writing at the end of the\n\ | |
615 file.\n\ | |
616 @end table\n\ | |
617 \n\ | |
4865 | 618 Append a \"t\" to the mode string to open the file in text mode or a\n\ |
619 \"b\" to open in binary mode. On Windows and Macintosh systems, text\n\ | |
620 mode reading and writing automatically converts linefeeds to the\n\ | |
621 appropriate line end character for the system (carriage-return linefeed\n\ | |
6665 | 622 on Windows, carriage-return on Macintosh). The default if no mode is\n\ |
4865 | 623 specified is binary mode.\n\ |
624 \n\ | |
5325 | 625 Additionally, you may append a \"z\" to the mode string to open a\n\ |
626 gzipped file for reading or writing. For this to be successful, you\n\ | |
627 must also open the file in binary mode.\n\ | |
628 \n\ | |
3372 | 629 The parameter @var{arch} is a string specifying the default data format\n\ |
630 for the file. Valid values for @var{arch} are:\n\ | |
2318 | 631 \n\ |
3372 | 632 @table @asis\n\ |
633 @samp{native}\n\ | |
634 The format of the current machine (this is the default).\n\ | |
635 \n\ | |
4082 | 636 @samp{ieee-be}\n\ |
3372 | 637 IEEE big endian format.\n\ |
638 \n\ | |
4082 | 639 @samp{ieee-le}\n\ |
3372 | 640 IEEE little endian format.\n\ |
2318 | 641 \n\ |
3372 | 642 @samp{vaxd}\n\ |
643 VAX D floating format.\n\ | |
2318 | 644 \n\ |
3372 | 645 @samp{vaxg}\n\ |
646 VAX G floating format.\n\ | |
2318 | 647 \n\ |
3372 | 648 @samp{cray}\n\ |
649 Cray floating format.\n\ | |
650 @end table\n\ | |
651 \n\ | |
652 @noindent\n\ | |
653 however, conversions are currently only supported for @samp{native}\n\ | |
654 @samp{ieee-be}, and @samp{ieee-le} formats.\n\ | |
7781 | 655 @seealso{fclose, fgets, fputs, fread, fseek, ferror, fprintf, fscanf, ftell, fwrite}\n\ |
5642 | 656 @end deftypefn") |
529 | 657 { |
2599 | 658 octave_value_list retval; |
659 | |
660 retval(0) = -1.0; | |
529 | 661 |
662 int nargin = args.length (); | |
663 | |
2095 | 664 if (nargin == 1) |
665 { | |
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666 if (nargout < 2 && args(0).is_string ()) |
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667 { |
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668 // If there is only one argument and it is a string but it |
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669 // is not the string "all", we assume it is a file to open |
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670 // with MODE = "r". To open a file called "all", you have |
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671 // to supply more than one argument. |
3263 | 672 |
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673 if (args(0).string_value () == "all") |
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674 return octave_stream_list::open_file_numbers (); |
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675 } |
2095 | 676 else |
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677 { |
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678 string_vector tmp = octave_stream_list::get_info (args(0)); |
529 | 679 |
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680 if (! error_state) |
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681 { |
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682 retval(2) = tmp(2); |
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683 retval(1) = tmp(1); |
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684 retval(0) = tmp(0); |
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685 } |
3263 | 686 |
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687 return retval; |
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688 } |
1 | 689 } |
690 | |
2095 | 691 if (nargin > 0 && nargin < 4) |
692 { | |
693 octave_value mode = (nargin == 2 || nargin == 3) | |
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694 ? args(1) : octave_value ("r"); |
2095 | 695 |
696 octave_value arch = (nargin == 3) | |
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697 ? args(2) : octave_value ("native"); |
2095 | 698 |
699 int fid = -1; | |
700 | |
3340 | 701 octave_stream os = do_stream_open (args(0), mode, arch, "fopen", fid); |
2095 | 702 |
5370 | 703 if (os && ! error_state) |
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704 { |
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705 retval(1) = ""; |
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706 retval(0) = octave_stream_list::insert (os); |
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707 } |
2095 | 708 else |
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709 { |
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710 int error_number = 0; |
5370 | 711 |
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712 retval(1) = os.error (false, error_number); |
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713 retval(0) = -1.0; |
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714 } |
2095 | 715 } |
716 else | |
5823 | 717 print_usage (); |
1 | 718 |
719 return retval; | |
720 } | |
721 | |
1957 | 722 DEFUN (freport, args, , |
3372 | 723 "-*- texinfo -*-\n\ |
724 @deftypefn {Built-in Function} {} freport ()\n\ | |
725 Print a list of which files have been opened, and whether they are open\n\ | |
10840 | 726 for reading, writing, or both. For example:\n\ |
3372 | 727 \n\ |
728 @example\n\ | |
729 @group\n\ | |
730 freport ()\n\ | |
731 \n\ | |
732 @print{} number mode name\n\ | |
733 @print{} \n\ | |
734 @print{} 0 r stdin\n\ | |
735 @print{} 1 w stdout\n\ | |
736 @print{} 2 w stderr\n\ | |
737 @print{} 3 r myfile\n\ | |
738 @end group\n\ | |
739 @end example\n\ | |
740 @end deftypefn") | |
1181 | 741 { |
2095 | 742 octave_value_list retval; |
1181 | 743 |
744 int nargin = args.length (); | |
745 | |
746 if (nargin > 0) | |
747 warning ("freport: ignoring extra arguments"); | |
748 | |
2095 | 749 octave_stdout << octave_stream_list::list_open_files (); |
1181 | 750 |
751 return retval; | |
752 } | |
753 | |
4715 | 754 DEFUN (frewind, args, nargout, |
3372 | 755 "-*- texinfo -*-\n\ |
756 @deftypefn {Built-in Function} {} frewind (@var{fid})\n\ | |
757 Move the file pointer to the beginning of the file @var{fid}, returning\n\ | |
4715 | 758 0 for success, and -1 if an error was encountered. It is equivalent to\n\ |
3372 | 759 @code{fseek (@var{fid}, 0, SEEK_SET)}.\n\ |
760 @end deftypefn") | |
529 | 761 { |
4715 | 762 octave_value retval; |
763 | |
764 int result = -1; | |
1 | 765 |
506 | 766 int nargin = args.length (); |
767 | |
2095 | 768 if (nargin == 1) |
1086 | 769 { |
3341 | 770 octave_stream os = octave_stream_list::lookup (args(0), "frewind"); |
636 | 771 |
3341 | 772 if (! error_state) |
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773 result = os.rewind (); |
1 | 774 } |
775 else | |
5823 | 776 print_usage (); |
1 | 777 |
4715 | 778 if (nargout > 0) |
779 retval = result; | |
780 | |
1 | 781 return retval; |
782 } | |
783 | |
1957 | 784 DEFUN (fseek, args, , |
3372 | 785 "-*- texinfo -*-\n\ |
786 @deftypefn {Built-in Function} {} fseek (@var{fid}, @var{offset}, @var{origin})\n\ | |
5095 | 787 Set the file pointer to any location within the file @var{fid}.\n\ |
788 \n\ | |
789 The pointer is positioned @var{offset} characters from the @var{origin},\n\ | |
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790 which may be one of the predefined variables @w{@code{SEEK_CUR}} (current\n\ |
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791 position), @w{@code{SEEK_SET}} (beginning), or @w{@code{SEEK_END}} (end of\n\ |
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792 file) or strings \"cof\", \"bof\" or \"eof\". If @var{origin} is omitted,\n\ |
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793 @w{@code{SEEK_SET}} is assumed. The offset must be zero, or a value returned\n\ |
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794 by @code{ftell} (in which case @var{origin} must be @w{@code{SEEK_SET}}).\n\ |
5095 | 795 \n\ |
796 Return 0 on success and -1 on error.\n\ | |
5642 | 797 @seealso{ftell, fopen, fclose}\n\ |
798 @end deftypefn") | |
529 | 799 { |
4233 | 800 octave_value retval = -1; |
529 | 801 |
802 int nargin = args.length (); | |
803 | |
2095 | 804 if (nargin == 2 || nargin == 3) |
805 { | |
3341 | 806 octave_stream os = octave_stream_list::lookup (args(0), "fseek"); |
1181 | 807 |
3341 | 808 if (! error_state) |
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809 { |
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810 octave_value origin_arg = (nargin == 3) |
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811 ? args(2) : octave_value (-1.0); |
1 | 812 |
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813 retval = os.seek (args(1), origin_arg); |
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814 } |
368 | 815 } |
2095 | 816 else |
5823 | 817 print_usage (); |
1 | 818 |
819 return retval; | |
820 } | |
821 | |
1957 | 822 DEFUN (ftell, args, , |
3372 | 823 "-*- texinfo -*-\n\ |
824 @deftypefn {Built-in Function} {} ftell (@var{fid})\n\ | |
825 Return the position of the file pointer as the number of characters\n\ | |
826 from the beginning of the file @var{fid}.\n\ | |
5642 | 827 @seealso{fseek, fopen, fclose}\n\ |
828 @end deftypefn") | |
1181 | 829 { |
4797 | 830 octave_value retval = -1; |
1 | 831 |
506 | 832 int nargin = args.length (); |
833 | |
2095 | 834 if (nargin == 1) |
1 | 835 { |
3341 | 836 octave_stream os = octave_stream_list::lookup (args(0), "ftell"); |
1 | 837 |
3341 | 838 if (! error_state) |
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839 retval = os.tell (); |
1 | 840 } |
841 else | |
5823 | 842 print_usage (); |
1 | 843 |
844 return retval; | |
845 } | |
846 | |
3737 | 847 DEFUN (fprintf, args, nargout, |
3372 | 848 "-*- texinfo -*-\n\ |
849 @deftypefn {Built-in Function} {} fprintf (@var{fid}, @var{template}, @dots{})\n\ | |
850 This function is just like @code{printf}, except that the output is\n\ | |
851 written to the stream @var{fid} instead of @code{stdout}.\n\ | |
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852 If @var{fid} is omitted, the output is written to @code{stdout}.\n\ |
5642 | 853 @seealso{printf, sprintf, fread, fscanf, fopen, fclose}\n\ |
854 @end deftypefn") | |
1181 | 855 { |
4468 | 856 static std::string who = "fprintf"; |
857 | |
4715 | 858 octave_value retval; |
859 | |
860 int result = -1; | |
4468 | 861 |
1181 | 862 int nargin = args.length (); |
863 | |
2875 | 864 if (nargin > 1 || (nargin > 0 && args(0).is_string ())) |
2095 | 865 { |
3340 | 866 octave_stream os; |
2873 | 867 int fmt_n = 0; |
868 | |
3737 | 869 if (args(0).is_string ()) |
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870 { |
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871 os = octave_stream_list::lookup (1, who); |
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872 } |
2873 | 873 else |
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874 { |
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875 fmt_n = 1; |
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876 os = octave_stream_list::lookup (args(0), who); |
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877 } |
2095 | 878 |
3341 | 879 if (! error_state) |
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880 { |
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881 if (args(fmt_n).is_string ()) |
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882 { |
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883 octave_value_list tmp_args; |
2095 | 884 |
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885 if (nargin > 1 + fmt_n) |
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886 { |
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887 tmp_args.resize (nargin-fmt_n-1, octave_value ()); |
2095 | 888 |
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889 for (int i = fmt_n + 1; i < nargin; i++) |
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890 tmp_args(i-fmt_n-1) = args(i); |
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891 } |
2095 | 892 |
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893 result = os.printf (args(fmt_n), tmp_args, who); |
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894 } |
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895 else |
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896 ::error ("%s: format must be a string", who.c_str ()); |
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897 } |
2095 | 898 } |
899 else | |
5823 | 900 print_usage (); |
1181 | 901 |
4715 | 902 if (nargout > 0) |
903 retval = result; | |
904 | |
905 return retval; | |
1181 | 906 } |
907 | |
4715 | 908 DEFUN (printf, args, nargout, |
4468 | 909 "-*- texinfo -*-\n\ |
5095 | 910 @deftypefn {Built-in Function} {} printf (@var{template}, @dots{})\n\ |
4468 | 911 Print optional arguments under the control of the template string\n\ |
5653 | 912 @var{template} to the stream @code{stdout} and return the number of\n\ |
913 characters printed.\n\ | |
914 @ifclear OCTAVE_MANUAL\n\ | |
5095 | 915 \n\ |
5653 | 916 See the Formatted Output section of the GNU Octave manual for a\n\ |
917 complete description of the syntax of the template string.\n\ | |
918 @end ifclear\n\ | |
5642 | 919 @seealso{fprintf, sprintf, scanf}\n\ |
920 @end deftypefn") | |
4468 | 921 { |
922 static std::string who = "printf"; | |
923 | |
4715 | 924 octave_value retval; |
925 | |
926 int result = -1; | |
4468 | 927 |
928 int nargin = args.length (); | |
929 | |
930 if (nargin > 0) | |
931 { | |
932 if (args(0).is_string ()) | |
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933 { |
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934 octave_value_list tmp_args; |
4468 | 935 |
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936 if (nargin > 1) |
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937 { |
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938 tmp_args.resize (nargin-1, octave_value ()); |
4468 | 939 |
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940 for (int i = 1; i < nargin; i++) |
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941 tmp_args(i-1) = args(i); |
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942 } |
4468 | 943 |
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944 result = stdout_stream.printf (args(0), tmp_args, who); |
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945 } |
4468 | 946 else |
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947 ::error ("%s: format must be a string", who.c_str ()); |
4468 | 948 } |
949 else | |
5823 | 950 print_usage (); |
4468 | 951 |
4715 | 952 if (nargout > 0) |
953 retval = result; | |
954 | |
4468 | 955 return retval; |
956 } | |
957 | |
2095 | 958 DEFUN (fputs, args, , |
3372 | 959 "-*- texinfo -*-\n\ |
960 @deftypefn {Built-in Function} {} fputs (@var{fid}, @var{string})\n\ | |
961 Write a string to a file with no formatting.\n\ | |
5095 | 962 \n\ |
963 Return a non-negative number on success and EOF on error.\n\ | |
7781 | 964 @seealso{scanf, sscanf, fread, fprintf, fgets, fscanf}\n\ |
3372 | 965 @end deftypefn") |
1181 | 966 { |
4468 | 967 static std::string who = "fputs"; |
968 | |
4233 | 969 octave_value retval = -1; |
1181 | 970 |
971 int nargin = args.length (); | |
972 | |
2095 | 973 if (nargin == 2) |
974 { | |
4468 | 975 octave_stream os = octave_stream_list::lookup (args(0), who); |
1181 | 976 |
3341 | 977 if (! error_state) |
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978 retval = os.puts (args(1), who); |
2095 | 979 } |
1181 | 980 else |
5823 | 981 print_usage (); |
4468 | 982 |
983 return retval; | |
984 } | |
985 | |
986 DEFUN (puts, args, , | |
987 "-*- texinfo -*-\n\ | |
988 @deftypefn {Built-in Function} {} puts (@var{string})\n\ | |
989 Write a string to the standard output with no formatting.\n\ | |
5095 | 990 \n\ |
991 Return a non-negative number on success and EOF on error.\n\ | |
4468 | 992 @end deftypefn") |
993 { | |
994 static std::string who = "puts"; | |
995 | |
996 octave_value retval = -1; | |
997 | |
998 if (args.length () == 1) | |
999 retval = stdout_stream.puts (args(0), who); | |
1000 else | |
5823 | 1001 print_usage (); |
1181 | 1002 |
1003 return retval; | |
1004 } | |
1005 | |
2095 | 1006 DEFUN (sprintf, args, , |
3372 | 1007 "-*- texinfo -*-\n\ |
1008 @deftypefn {Built-in Function} {} sprintf (@var{template}, @dots{})\n\ | |
1009 This is like @code{printf}, except that the output is returned as a\n\ | |
1010 string. Unlike the C library function, which requires you to provide a\n\ | |
1011 suitably sized string as an argument, Octave's @code{sprintf} function\n\ | |
1012 returns the string, automatically sized to hold all of the items\n\ | |
1013 converted.\n\ | |
5642 | 1014 @seealso{printf, fprintf, sscanf}\n\ |
1015 @end deftypefn") | |
1 | 1016 { |
4468 | 1017 static std::string who = "sprintf"; |
1018 | |
2095 | 1019 octave_value_list retval; |
1 | 1020 |
2095 | 1021 int nargin = args.length (); |
1 | 1022 |
2095 | 1023 if (nargin > 0) |
1 | 1024 { |
2116 | 1025 retval(2) = -1.0; |
1026 retval(1) = "unknown error"; | |
1027 retval(0) = ""; | |
1028 | |
3340 | 1029 octave_ostrstream *ostr = new octave_ostrstream (); |
1 | 1030 |
3340 | 1031 octave_stream os (ostr); |
628 | 1032 |
3340 | 1033 if (os.is_valid ()) |
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1034 { |
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1035 octave_value fmt_arg = args(0); |
6007 | 1036 |
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1037 if (fmt_arg.is_string ()) |
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1038 { |
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1039 octave_value_list tmp_args; |
1 | 1040 |
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1041 if (nargin > 1) |
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1042 { |
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1043 tmp_args.resize (nargin-1, octave_value ()); |
1 | 1044 |
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1045 for (int i = 1; i < nargin; i++) |
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1046 tmp_args(i-1) = args(i); |
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1047 } |
628 | 1048 |
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1049 retval(2) = os.printf (fmt_arg, tmp_args, who); |
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1050 retval(1) = os.error (); |
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1051 retval(0) = octave_value (ostr->str (), |
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1052 fmt_arg.is_sq_string () ? '\'' : '"'); |
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1053 } |
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1054 else |
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1055 ::error ("%s: format must be a string", who.c_str ()); |
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1056 } |
2095 | 1057 else |
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1058 ::error ("%s: unable to create output buffer", who.c_str ()); |
1 | 1059 } |
1060 else | |
5823 | 1061 print_usage (); |
1 | 1062 |
1063 return retval; | |
1064 } | |
1065 | |
2095 | 1066 DEFUN (fscanf, args, , |
3372 | 1067 "-*- texinfo -*-\n\ |
10840 | 1068 @deftypefn {Built-in Function} {[@var{val}, @var{count}] =} fscanf (@var{fid}, @var{template}, @var{size})\n\ |
7650 | 1069 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}] =} fscanf (@var{fid}, @var{template}, \"C\")\n\ |
3372 | 1070 In the first form, read from @var{fid} according to @var{template},\n\ |
1071 returning the result in the matrix @var{val}.\n\ | |
2122 | 1072 \n\ |
3372 | 1073 The optional argument @var{size} specifies the amount of data to read\n\ |
1074 and may be one of\n\ | |
1075 \n\ | |
1076 @table @code\n\ | |
1077 @item Inf\n\ | |
1078 Read as much as possible, returning a column vector.\n\ | |
1079 \n\ | |
1080 @item @var{nr}\n\ | |
1081 Read up to @var{nr} elements, returning a column vector.\n\ | |
2122 | 1082 \n\ |
3372 | 1083 @item [@var{nr}, Inf]\n\ |
1084 Read as much as possible, returning a matrix with @var{nr} rows. If the\n\ | |
1085 number of elements read is not an exact multiple of @var{nr}, the last\n\ | |
1086 column is padded with zeros.\n\ | |
1087 \n\ | |
1088 @item [@var{nr}, @var{nc}]\n\ | |
1089 Read up to @code{@var{nr} * @var{nc}} elements, returning a matrix with\n\ | |
1090 @var{nr} rows. If the number of elements read is not an exact multiple\n\ | |
1091 of @var{nr}, the last column is padded with zeros.\n\ | |
1092 @end table\n\ | |
2122 | 1093 \n\ |
3372 | 1094 @noindent\n\ |
1095 If @var{size} is omitted, a value of @code{Inf} is assumed.\n\ | |
2122 | 1096 \n\ |
3372 | 1097 A string is returned if @var{template} specifies only character\n\ |
1098 conversions.\n\ | |
2215 | 1099 \n\ |
3372 | 1100 The number of items successfully read is returned in @var{count}.\n\ |
2215 | 1101 \n\ |
3372 | 1102 In the second form, read from @var{fid} according to @var{template},\n\ |
1103 with each conversion specifier in @var{template} corresponding to a\n\ | |
1104 single scalar return value. This form is more `C-like', and also\n\ | |
3491 | 1105 compatible with previous versions of Octave. The number of successful\n\ |
1106 conversions is returned in @var{count}\n\ | |
5653 | 1107 @ifclear OCTAVE_MANUAL\n\ |
1108 \n\ | |
1109 See the Formatted Input section of the GNU Octave manual for a\n\ | |
1110 complete description of the syntax of the template string.\n\ | |
1111 @end ifclear\n\ | |
7781 | 1112 @seealso{scanf, sscanf, fread, fprintf, fgets, fputs}\n\ |
5642 | 1113 @end deftypefn") |
1181 | 1114 { |
4468 | 1115 static std::string who = "fscanf"; |
1116 | |
2095 | 1117 octave_value_list retval; |
1181 | 1118 |
1119 int nargin = args.length (); | |
1120 | |
2215 | 1121 if (nargin == 3 && args(2).is_string ()) |
2095 | 1122 { |
4468 | 1123 octave_stream os = octave_stream_list::lookup (args(0), who); |
1181 | 1124 |
3341 | 1125 if (! error_state) |
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1126 { |
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1127 if (args(1).is_string ()) |
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1128 retval = os.oscanf (args(1), who); |
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1129 else |
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1130 ::error ("%s: format must be a string", who.c_str ()); |
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1131 } |
2095 | 1132 } |
1181 | 1133 else |
2215 | 1134 { |
1135 retval (1) = 0.0; | |
1136 retval (0) = Matrix (); | |
1137 | |
1138 if (nargin == 2 || nargin == 3) | |
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1139 { |
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1140 octave_stream os = octave_stream_list::lookup (args(0), who); |
2215 | 1141 |
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1142 if (! error_state) |
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1143 { |
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1144 if (args(1).is_string ()) |
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1145 { |
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1146 octave_idx_type count = 0; |
2215 | 1147 |
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1148 Array<double> size = (nargin == 3) |
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1149 ? args(2).vector_value () |
11570
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1150 : Array<double> (dim_vector (1, 1), lo_ieee_inf_value ()); |
2215 | 1151 |
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1152 if (! error_state) |
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1153 { |
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1154 octave_value tmp = os.scanf (args(1), size, count, who); |
2215 | 1155 |
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1156 if (! error_state) |
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1157 { |
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1158 retval(1) = count; |
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1159 retval(0) = tmp; |
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1160 } |
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1161 } |
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1162 } |
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1163 else |
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1164 ::error ("%s: format must be a string", who.c_str ()); |
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1165 } |
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1166 } |
2215 | 1167 else |
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1168 print_usage (); |
2215 | 1169 } |
1181 | 1170 |
1171 return retval; | |
1172 } | |
1173 | |
2095 | 1174 DEFUN (sscanf, args, , |
3372 | 1175 "-*- texinfo -*-\n\ |
10840 | 1176 @deftypefn {Built-in Function} {[@var{val}, @var{count}] =} sscanf (@var{string}, @var{template}, @var{size})\n\ |
7650 | 1177 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}] =} sscanf (@var{string}, @var{template}, \"C\")\n\ |
3372 | 1178 This is like @code{fscanf}, except that the characters are taken from the\n\ |
1179 string @var{string} instead of from a stream. Reaching the end of the\n\ | |
1180 string is treated as an end-of-file condition.\n\ | |
5642 | 1181 @seealso{fscanf, scanf, sprintf}\n\ |
1182 @end deftypefn") | |
444 | 1183 { |
4468 | 1184 static std::string who = "sscanf"; |
1185 | |
2095 | 1186 octave_value_list retval; |
444 | 1187 |
506 | 1188 int nargin = args.length (); |
1189 | |
2215 | 1190 if (nargin == 3 && args(2).is_string ()) |
2095 | 1191 { |
1192 if (args(0).is_string ()) | |
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1193 { |
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1194 std::string data = args(0).string_value (); |
444 | 1195 |
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1196 octave_stream os = octave_istrstream::create (data); |
1358 | 1197 |
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1198 if (os.is_valid ()) |
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1199 { |
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1200 if (args(1).is_string ()) |
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1201 retval = os.oscanf (args(1), who); |
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1202 else |
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1203 ::error ("%s: format must be a string", who.c_str ()); |
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1204 } |
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1205 else |
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1206 ::error ("%s: unable to create temporary input buffer", |
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1207 who.c_str ()); |
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1208 } |
636 | 1209 else |
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1210 ::error ("%s: first argument must be a string", who.c_str ()); |
444 | 1211 } |
1212 else | |
2215 | 1213 { |
1214 if (nargin == 2 || nargin == 3) | |
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1215 { |
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1216 retval(3) = -1.0; |
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1217 retval(2) = "unknown error"; |
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1218 retval(1) = 0.0; |
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1219 retval(0) = Matrix (); |
2215 | 1220 |
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1221 if (args(0).is_string ()) |
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1222 { |
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1223 std::string data = args(0).string_value (); |
2215 | 1224 |
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1225 octave_stream os = octave_istrstream::create (data); |
2215 | 1226 |
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1227 if (os.is_valid ()) |
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1228 { |
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1229 if (args(1).is_string ()) |
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1230 { |
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1231 octave_idx_type count = 0; |
2215 | 1232 |
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1233 Array<double> size = (nargin == 3) |
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1234 ? args(2).vector_value () |
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1235 : Array<double> (dim_vector (1, 1), |
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1236 lo_ieee_inf_value ()); |
2215 | 1237 |
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1238 octave_value tmp = os.scanf (args(1), size, count, who); |
2215 | 1239 |
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1240 if (! error_state) |
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1241 { |
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1242 // FIXME -- is this the right thing to do? |
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1243 // Extract error message first, because getting |
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1244 // position will clear it. |
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1245 std::string errmsg = os.error (); |
2215 | 1246 |
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1247 retval(3) = os.tell () + 1; |
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1248 retval(2) = errmsg; |
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1249 retval(1) = count; |
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1250 retval(0) = tmp; |
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1251 } |
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1252 } |
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1253 else |
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1254 ::error ("%s: format must be a string", who.c_str ()); |
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1255 } |
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1256 else |
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1257 ::error ("%s: unable to create temporary input buffer", |
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1258 who.c_str ()); |
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1259 } |
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1260 else |
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1261 ::error ("%s: first argument must be a string", who.c_str ()); |
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1262 } |
2215 | 1263 else |
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1264 print_usage (); |
2215 | 1265 } |
444 | 1266 |
1267 return retval; | |
1268 } | |
1269 | |
2215 | 1270 DEFUN (scanf, args, nargout, |
3372 | 1271 "-*- texinfo -*-\n\ |
10840 | 1272 @deftypefn {Built-in Function} {[@var{val}, @var{count}] =} scanf (@var{template}, @var{size})\n\ |
7650 | 1273 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}]] =} scanf (@var{template}, \"C\")\n\ |
3372 | 1274 This is equivalent to calling @code{fscanf} with @var{fid} = @code{stdin}.\n\ |
1275 \n\ | |
1276 It is currently not useful to call @code{scanf} in interactive\n\ | |
1277 programs.\n\ | |
5642 | 1278 @seealso{fscanf, sscanf, printf}\n\ |
1279 @end deftypefn") | |
2215 | 1280 { |
1281 int nargin = args.length (); | |
1282 | |
1283 octave_value_list tmp_args (nargin+1, octave_value ()); | |
1284 | |
1285 tmp_args (0) = 0.0; | |
1286 for (int i = 0; i < nargin; i++) | |
1287 tmp_args (i+1) = args (i); | |
1288 | |
1289 return Ffscanf (tmp_args, nargout); | |
1290 } | |
1291 | |
2116 | 1292 static octave_value |
1293 do_fread (octave_stream& os, const octave_value& size_arg, | |
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1294 const octave_value& prec_arg, const octave_value& skip_arg, |
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1295 const octave_value& arch_arg, octave_idx_type& count) |
2116 | 1296 { |
1297 octave_value retval; | |
1298 | |
1299 count = -1; | |
1300 | |
3810 | 1301 Array<double> size = size_arg.vector_value (); |
2116 | 1302 |
1303 if (! error_state) | |
1304 { | |
3523 | 1305 std::string prec = prec_arg.string_value (); |
2116 | 1306 |
1307 if (! error_state) | |
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1308 { |
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1309 int block_size = 1; |
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1310 oct_data_conv::data_type input_type; |
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1311 oct_data_conv::data_type output_type; |
4944 | 1312 |
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1313 oct_data_conv::string_to_data_type (prec, block_size, |
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1314 input_type, output_type); |
2116 | 1315 |
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1316 if (! error_state) |
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1317 { |
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1318 int skip = skip_arg.int_value (true); |
2116 | 1319 |
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1320 if (! error_state) |
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1321 { |
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1322 std::string arch = arch_arg.string_value (); |
3202 | 1323 |
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1324 if (! error_state) |
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1325 { |
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1326 oct_mach_info::float_format flt_fmt |
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1327 = oct_mach_info::string_to_float_format (arch); |
2116 | 1328 |
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1329 if (! error_state) |
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1330 retval = os.read (size, block_size, input_type, |
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1331 output_type, skip, flt_fmt, count); |
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1332 } |
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1333 else |
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1334 ::error ("fread: architecture type must be a string"); |
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1335 } |
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1336 else |
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1337 ::error ("fread: skip must be an integer"); |
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1338 } |
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1339 else |
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1340 ::error ("fread: invalid data type specified"); |
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1341 } |
2116 | 1342 else |
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1343 ::error ("fread: precision must be a string"); |
2116 | 1344 } |
1345 else | |
1346 ::error ("fread: invalid size specified"); | |
1347 | |
1348 return retval; | |
1349 } | |
1350 | |
1351 DEFUN (fread, args, , | |
3372 | 1352 "-*- texinfo -*-\n\ |
1353 @deftypefn {Built-in Function} {[@var{val}, @var{count}] =} fread (@var{fid}, @var{size}, @var{precision}, @var{skip}, @var{arch})\n\ | |
1354 Read binary data of type @var{precision} from the specified file ID\n\ | |
1355 @var{fid}.\n\ | |
1356 \n\ | |
1357 The optional argument @var{size} specifies the amount of data to read\n\ | |
1358 and may be one of\n\ | |
1359 \n\ | |
1360 @table @code\n\ | |
1361 @item Inf\n\ | |
1362 Read as much as possible, returning a column vector.\n\ | |
529 | 1363 \n\ |
3372 | 1364 @item @var{nr}\n\ |
1365 Read up to @var{nr} elements, returning a column vector.\n\ | |
1366 \n\ | |
1367 @item [@var{nr}, Inf]\n\ | |
1368 Read as much as possible, returning a matrix with @var{nr} rows. If the\n\ | |
1369 number of elements read is not an exact multiple of @var{nr}, the last\n\ | |
1370 column is padded with zeros.\n\ | |
1371 \n\ | |
1372 @item [@var{nr}, @var{nc}]\n\ | |
1373 Read up to @code{@var{nr} * @var{nc}} elements, returning a matrix with\n\ | |
1374 @var{nr} rows. If the number of elements read is not an exact multiple\n\ | |
1375 of @var{nr}, the last column is padded with zeros.\n\ | |
1376 @end table\n\ | |
1377 \n\ | |
1378 @noindent\n\ | |
1379 If @var{size} is omitted, a value of @code{Inf} is assumed.\n\ | |
2318 | 1380 \n\ |
3372 | 1381 The optional argument @var{precision} is a string specifying the type of\n\ |
1382 data to read and may be one of\n\ | |
1383 \n\ | |
1384 @table @code\n\ | |
4944 | 1385 @item \"schar\"\n\ |
1386 @itemx \"signed char\"\n\ | |
3372 | 1387 Signed character.\n\ |
529 | 1388 \n\ |
4944 | 1389 @item \"uchar\"\n\ |
1390 @itemx \"unsigned char\"\n\ | |
3372 | 1391 Unsigned character.\n\ |
1392 \n\ | |
4944 | 1393 @item \"int8\"\n\ |
1394 @itemx \"integer*1\"\n\ | |
1395 \n\ | |
1396 8-bit signed integer.\n\ | |
2318 | 1397 \n\ |
4944 | 1398 @item \"int16\"\n\ |
1399 @itemx \"integer*2\"\n\ | |
1400 16-bit signed integer.\n\ | |
3372 | 1401 \n\ |
4944 | 1402 @item \"int32\"\n\ |
1403 @itemx \"integer*4\"\n\ | |
1404 32-bit signed integer.\n\ | |
3372 | 1405 \n\ |
4944 | 1406 @item \"int64\"\n\ |
1407 @itemx \"integer*8\"\n\ | |
1408 64-bit signed integer.\n\ | |
1409 \n\ | |
1410 @item \"uint8\"\n\ | |
1411 8-bit unsigned integer.\n\ | |
529 | 1412 \n\ |
4944 | 1413 @item \"uint16\"\n\ |
1414 16-bit unsigned integer.\n\ | |
3372 | 1415 \n\ |
4944 | 1416 @item \"uint32\"\n\ |
1417 32-bit unsigned integer.\n\ | |
3372 | 1418 \n\ |
4944 | 1419 @item \"uint64\"\n\ |
1420 64-bit unsigned integer.\n\ | |
1421 \n\ | |
1422 @item \"single\"\n\ | |
3372 | 1423 @itemx \"float32\"\n\ |
1424 @itemx \"real*4\"\n\ | |
4944 | 1425 32-bit floating point number.\n\ |
3372 | 1426 \n\ |
1427 @item \"double\"\n\ | |
1428 @itemx \"float64\"\n\ | |
1429 @itemx \"real*8\"\n\ | |
4944 | 1430 64-bit floating point number.\n\ |
1431 \n\ | |
1432 @item \"char\"\n\ | |
1433 @itemx \"char*1\"\n\ | |
1434 Single character.\n\ | |
3372 | 1435 \n\ |
4944 | 1436 @item \"short\"\n\ |
1437 Short integer (size is platform dependent).\n\ | |
1438 \n\ | |
1439 @item \"int\"\n\ | |
1440 Integer (size is platform dependent).\n\ | |
1441 \n\ | |
1442 @item \"long\"\n\ | |
1443 Long integer (size is platform dependent).\n\ | |
3372 | 1444 \n\ |
4944 | 1445 @item \"ushort\"\n\ |
1446 @itemx \"unsigned short\"\n\ | |
1447 Unsigned short integer (size is platform dependent).\n\ | |
4610 | 1448 \n\ |
4944 | 1449 @item \"uint\"\n\ |
1450 @itemx \"unsigned int\"\n\ | |
1451 Unsigned integer (size is platform dependent).\n\ | |
4610 | 1452 \n\ |
4944 | 1453 @item \"ulong\"\n\ |
1454 @itemx \"unsigned long\"\n\ | |
1455 Unsigned long integer (size is platform dependent).\n\ | |
1456 \n\ | |
1457 @item \"float\"\n\ | |
1458 Single precision floating point number (size is platform dependent).\n\ | |
3372 | 1459 @end table\n\ |
1460 \n\ | |
1461 @noindent\n\ | |
1462 The default precision is @code{\"uchar\"}.\n\ | |
2318 | 1463 \n\ |
4944 | 1464 The @var{precision} argument may also specify an optional repeat\n\ |
1465 count. For example, @samp{32*single} causes @code{fread} to read\n\ | |
1466 a block of 32 single precision floating point numbers. Reading in\n\ | |
1467 blocks is useful in combination with the @var{skip} argument.\n\ | |
1468 \n\ | |
1469 The @var{precision} argument may also specify a type conversion.\n\ | |
1470 For example, @samp{int16=>int32} causes @code{fread} to read 16-bit\n\ | |
1471 integer values and return an array of 32-bit integer values. By\n\ | |
1472 default, @code{fread} returns a double precision array. The special\n\ | |
1473 form @samp{*TYPE} is shorthand for @samp{TYPE=>TYPE}.\n\ | |
1474 \n\ | |
7096 | 1475 The conversion and repeat counts may be combined. For example, the\n\ |
1476 specification @samp{32*single=>single} causes @code{fread} to read\n\ | |
1477 blocks of single precision floating point values and return an array\n\ | |
1478 of single precision values instead of the default array of double\n\ | |
1479 precision values.\n\ | |
4944 | 1480 \n\ |
3372 | 1481 The optional argument @var{skip} specifies the number of bytes to skip\n\ |
4944 | 1482 after each element (or block of elements) is read. If it is not\n\ |
1483 specified, a value of 0 is assumed. If the final block read is not\n\ | |
1484 complete, the final skip is omitted. For example,\n\ | |
1485 \n\ | |
1486 @example\n\ | |
1487 fread (f, 10, \"3*single=>single\", 8)\n\ | |
1488 @end example\n\ | |
1489 \n\ | |
1490 @noindent\n\ | |
1491 will omit the final 8-byte skip because the last read will not be\n\ | |
1492 a complete block of 3 values.\n\ | |
3372 | 1493 \n\ |
1494 The optional argument @var{arch} is a string specifying the data format\n\ | |
1495 for the file. Valid values are\n\ | |
529 | 1496 \n\ |
3372 | 1497 @table @code\n\ |
1498 @item \"native\"\n\ | |
1499 The format of the current machine.\n\ | |
1500 \n\ | |
4546 | 1501 @item \"ieee-be\"\n\ |
3372 | 1502 IEEE big endian.\n\ |
1503 \n\ | |
4546 | 1504 @item \"ieee-le\"\n\ |
3372 | 1505 IEEE little endian.\n\ |
2318 | 1506 \n\ |
3372 | 1507 @item \"vaxd\"\n\ |
1508 VAX D floating format.\n\ | |
1509 \n\ | |
1510 @item \"vaxg\"\n\ | |
1511 VAX G floating format.\n\ | |
2318 | 1512 \n\ |
3372 | 1513 @item \"cray\"\n\ |
1514 Cray floating format.\n\ | |
1515 @end table\n\ | |
2318 | 1516 \n\ |
3372 | 1517 @noindent\n\ |
1518 Conversions are currently only supported for @code{\"ieee-be\"} and\n\ | |
1519 @code{\"ieee-le\"} formats.\n\ | |
2318 | 1520 \n\ |
3372 | 1521 The data read from the file is returned in @var{val}, and the number of\n\ |
1522 values read is returned in @code{count}\n\ | |
5642 | 1523 @seealso{fwrite, fopen, fclose}\n\ |
1524 @end deftypefn") | |
529 | 1525 { |
2095 | 1526 octave_value_list retval; |
2116 | 1527 |
1528 int nargin = args.length (); | |
1529 | |
2318 | 1530 if (nargin > 0 && nargin < 6) |
2116 | 1531 { |
1532 retval(1) = -1.0; | |
1533 retval(0) = Matrix (); | |
1534 | |
3341 | 1535 octave_stream os = octave_stream_list::lookup (args(0), "fread"); |
2116 | 1536 |
3341 | 1537 if (! error_state) |
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1538 { |
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1539 octave_value size = lo_ieee_inf_value (); |
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1540 octave_value prec = "uchar"; |
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1541 octave_value skip = 0; |
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1542 octave_value arch = "unknown"; |
2116 | 1543 |
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1544 int idx = 1; |
2116 | 1545 |
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1546 if (nargin > idx && ! args(idx).is_string ()) |
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1547 size = args(idx++); |
4257 | 1548 |
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1549 if (nargin > idx) |
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1550 prec = args(idx++); |
2116 | 1551 |
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1552 if (nargin > idx) |
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1553 skip = args(idx++); |
4257 | 1554 |
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1555 if (nargin > idx) |
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1556 arch = args(idx++); |
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1557 else if (skip.is_string ()) |
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1558 { |
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1559 arch = skip; |
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1560 skip = 0; |
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1561 } |
2116 | 1562 |
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1563 octave_idx_type count = -1; |
2116 | 1564 |
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1565 octave_value tmp = do_fread (os, size, prec, skip, arch, count); |
2116 | 1566 |
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1567 retval(1) = count; |
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1568 retval(0) = tmp; |
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1569 } |
2116 | 1570 } |
1571 else | |
5823 | 1572 print_usage (); |
2116 | 1573 |
529 | 1574 return retval; |
1575 } | |
1576 | |
2116 | 1577 static int |
1578 do_fwrite (octave_stream& os, const octave_value& data, | |
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1579 const octave_value& prec_arg, const octave_value& skip_arg, |
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1580 const octave_value& arch_arg) |
2116 | 1581 { |
1582 int retval = -1; | |
1583 | |
3523 | 1584 std::string prec = prec_arg.string_value (); |
2116 | 1585 |
1586 if (! error_state) | |
1587 { | |
4944 | 1588 int block_size = 1; |
1589 oct_data_conv::data_type output_type; | |
1590 | |
1591 oct_data_conv::string_to_data_type (prec, block_size, output_type); | |
2116 | 1592 |
1593 if (! error_state) | |
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1594 { |
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1595 int skip = skip_arg.int_value (true); |
2116 | 1596 |
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1597 if (! error_state) |
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1598 { |
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1599 std::string arch = arch_arg.string_value (); |
3202 | 1600 |
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1601 if (! error_state) |
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1602 { |
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1603 oct_mach_info::float_format flt_fmt |
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1604 = oct_mach_info::string_to_float_format (arch); |
2116 | 1605 |
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1606 if (! error_state) |
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1607 retval = os.write (data, block_size, output_type, |
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1608 skip, flt_fmt); |
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1609 } |
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1610 else |
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1611 ::error ("fwrite: architecture type must be a string"); |
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1612 } |
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1613 else |
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1614 ::error ("fwrite: skip must be an integer"); |
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1615 } |
3202 | 1616 else |
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1617 ::error ("fwrite: invalid precision specified"); |
2116 | 1618 } |
1619 else | |
1620 ::error ("fwrite: precision must be a string"); | |
1621 | |
1622 return retval; | |
1623 } | |
1624 | |
1625 DEFUN (fwrite, args, , | |
3372 | 1626 "-*- texinfo -*-\n\ |
1627 @deftypefn {Built-in Function} {@var{count} =} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip}, @var{arch})\n\ | |
1628 Write data in binary form of type @var{precision} to the specified file\n\ | |
1629 ID @var{fid}, returning the number of values successfully written to the\n\ | |
1630 file.\n\ | |
1181 | 1631 \n\ |
3372 | 1632 The argument @var{data} is a matrix of values that are to be written to\n\ |
1633 the file. The values are extracted in column-major order.\n\ | |
1181 | 1634 \n\ |
3372 | 1635 The remaining arguments @var{precision}, @var{skip}, and @var{arch} are\n\ |
1636 optional, and are interpreted as described for @code{fread}.\n\ | |
1181 | 1637 \n\ |
3372 | 1638 The behavior of @code{fwrite} is undefined if the values in @var{data}\n\ |
1639 are too large to fit in the specified precision.\n\ | |
5642 | 1640 @seealso{fread, fopen, fclose}\n\ |
1641 @end deftypefn") | |
1181 | 1642 { |
4233 | 1643 octave_value retval = -1; |
2116 | 1644 |
1645 int nargin = args.length (); | |
1646 | |
1647 if (nargin > 1 && nargin < 6) | |
1648 { | |
3341 | 1649 octave_stream os = octave_stream_list::lookup (args(0), "fwrite"); |
2116 | 1650 |
3341 | 1651 if (! error_state) |
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1652 { |
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1653 octave_value prec = "uchar"; |
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1654 octave_value skip = 0; |
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1655 octave_value arch = "unknown"; |
2318 | 1656 |
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1657 int idx = 1; |
7708
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1658 |
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1659 octave_value data = args(idx++); |
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1660 |
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1661 if (nargin > idx) |
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1662 prec = args(idx++); |
2318 | 1663 |
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1664 if (nargin > idx) |
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1665 skip = args(idx++); |
2318 | 1666 |
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1667 if (nargin > idx) |
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1668 arch = args(idx++); |
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1669 else if (skip.is_string ()) |
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1670 { |
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1671 arch = skip; |
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1672 skip = 0; |
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1673 } |
2116 | 1674 |
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1675 double status = do_fwrite (os, data, prec, skip, arch); |
2825 | 1676 |
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1677 retval = status; |
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1678 } |
2116 | 1679 } |
1680 else | |
5823 | 1681 print_usage (); |
2116 | 1682 |
1181 | 1683 return retval; |
1684 } | |
1685 | |
5906 | 1686 DEFUNX ("feof", Ffeof, args, , |
3372 | 1687 "-*- texinfo -*-\n\ |
1688 @deftypefn {Built-in Function} {} feof (@var{fid})\n\ | |
1689 Return 1 if an end-of-file condition has been encountered for a given\n\ | |
1690 file and 0 otherwise. Note that it will only return 1 if the end of the\n\ | |
1691 file has already been encountered, not if the next read operation will\n\ | |
1692 result in an end-of-file condition.\n\ | |
5642 | 1693 @seealso{fread, fopen, fclose}\n\ |
1694 @end deftypefn") | |
529 | 1695 { |
4233 | 1696 octave_value retval = -1; |
529 | 1697 |
1698 int nargin = args.length (); | |
1699 | |
2095 | 1700 if (nargin == 1) |
1701 { | |
3341 | 1702 octave_stream os = octave_stream_list::lookup (args(0), "feof"); |
444 | 1703 |
3341 | 1704 if (! error_state) |
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1705 retval = os.eof () ? 1.0 : 0.0; |
2095 | 1706 } |
529 | 1707 else |
5823 | 1708 print_usage (); |
444 | 1709 |
1710 return retval; | |
1711 } | |
1712 | |
5906 | 1713 DEFUNX ("ferror", Fferror, args, , |
3372 | 1714 "-*- texinfo -*-\n\ |
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1715 @deftypefn {Built-in Function} {[@var{err}, @var{msg}] =} ferror (@var{fid}, \"clear\")\n\ |
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1716 Return 1 if an error condition has been encountered for the file ID\n\ |
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1717 @var{fid} and 0 otherwise. Note that it will only return 1 if an error\n\ |
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1718 has already been encountered, not if the next operation will result in\n\ |
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1719 an error condition.\n\ |
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1720 \n\ |
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1721 The second argument is optional. If it is supplied, also clear the\n\ |
3372 | 1722 error condition.\n\ |
1723 @end deftypefn") | |
1230 | 1724 { |
2095 | 1725 octave_value_list retval; |
1230 | 1726 |
2095 | 1727 int nargin = args.length (); |
1230 | 1728 |
2095 | 1729 if (nargin == 1 || nargin == 2) |
1730 { | |
3341 | 1731 octave_stream os = octave_stream_list::lookup (args(0), "ferror"); |
1230 | 1732 |
3341 | 1733 if (! error_state) |
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1734 { |
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1735 bool clear = false; |
1230 | 1736 |
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1737 if (nargin == 2) |
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1738 { |
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1739 std::string opt = args(1).string_value (); |
2095 | 1740 |
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1741 if (! error_state) |
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1742 clear = (opt == "clear"); |
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1743 else |
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1744 return retval; |
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1745 } |
1755 | 1746 |
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1747 int error_number = 0; |
2095 | 1748 |
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1749 std::string error_message = os.error (clear, error_number); |
1230 | 1750 |
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1751 retval(1) = error_number; |
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1752 retval(0) = error_message; |
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1753 } |
1230 | 1754 } |
2095 | 1755 else |
5823 | 1756 print_usage (); |
1230 | 1757 |
1758 return retval; | |
1759 } | |
1760 | |
1957 | 1761 DEFUN (popen, args, , |
3301 | 1762 "-*- texinfo -*-\n\ |
4326 | 1763 @deftypefn {Built-in Function} {@var{fid} =} popen (@var{command}, @var{mode})\n\ |
3301 | 1764 Start a process and create a pipe. The name of the command to run is\n\ |
1765 given by @var{command}. The file identifier corresponding to the input\n\ | |
1766 or output stream of the process is returned in @var{fid}. The argument\n\ | |
1767 @var{mode} may be\n\ | |
1768 \n\ | |
1769 @table @code\n\ | |
1770 @item \"r\"\n\ | |
1771 The pipe will be connected to the standard output of the process, and\n\ | |
1772 open for reading.\n\ | |
1230 | 1773 \n\ |
3301 | 1774 @item \"w\"\n\ |
1775 The pipe will be connected to the standard input of the process, and\n\ | |
1776 open for writing.\n\ | |
1777 @end table\n\ | |
1778 \n\ | |
10840 | 1779 For example:\n\ |
1230 | 1780 \n\ |
3301 | 1781 @example\n\ |
1782 @group\n\ | |
1783 fid = popen (\"ls -ltr / | tail -3\", \"r\");\n\ | |
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1784 while (ischar (s = fgets (fid)))\n\ |
3301 | 1785 fputs (stdout, s);\n\ |
1786 endwhile\n\ | |
1787 @print{} drwxr-xr-x 33 root root 3072 Feb 15 13:28 etc\n\ | |
1788 @print{} drwxr-xr-x 3 root root 1024 Feb 15 13:28 lib\n\ | |
1789 @print{} drwxrwxrwt 15 root root 2048 Feb 17 14:53 tmp\n\ | |
1790 @end group\n\ | |
1791 @end example\n\ | |
1792 @end deftypefn") | |
1230 | 1793 { |
4233 | 1794 octave_value retval = -1; |
1230 | 1795 |
1796 int nargin = args.length (); | |
1797 | |
2095 | 1798 if (nargin == 2) |
1799 { | |
3523 | 1800 std::string name = args(0).string_value (); |
1230 | 1801 |
2095 | 1802 if (! error_state) |
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1803 { |
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1804 std::string mode = args(1).string_value (); |
1230 | 1805 |
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1806 if (! error_state) |
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1807 { |
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1808 if (mode == "r") |
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1809 { |
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1810 octave_stream ips = octave_iprocstream::create (name); |
1230 | 1811 |
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1812 retval = octave_stream_list::insert (ips); |
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1813 } |
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1814 else if (mode == "w") |
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1815 { |
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1816 octave_stream ops = octave_oprocstream::create (name); |
1230 | 1817 |
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1818 retval = octave_stream_list::insert (ops); |
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1819 } |
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1820 else |
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1821 ::error ("popen: invalid mode specified"); |
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1822 } |
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1823 else |
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1824 ::error ("popen: mode must be a string"); |
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1825 } |
2095 | 1826 else |
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1827 ::error ("popen: name must be a string"); |
2095 | 1828 } |
1230 | 1829 else |
5823 | 1830 print_usage (); |
1230 | 1831 |
1832 return retval; | |
1833 } | |
1834 | |
1957 | 1835 DEFUN (pclose, args, , |
3381 | 1836 "-*- texinfo -*-\n\ |
3301 | 1837 @deftypefn {Built-in Function} {} pclose (@var{fid})\n\ |
1838 Close a file identifier that was opened by @code{popen}. You may also\n\ | |
1839 use @code{fclose} for the same purpose.\n\ | |
1840 @end deftypefn") | |
1230 | 1841 { |
4233 | 1842 octave_value retval = -1; |
1230 | 1843 |
1844 int nargin = args.length (); | |
1845 | |
2095 | 1846 if (nargin == 1) |
4233 | 1847 retval = octave_stream_list::remove (args(0), "pclose"); |
1377 | 1848 else |
5823 | 1849 print_usage (); |
1379 | 1850 |
1851 return retval; | |
1852 } | |
1853 | |
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1854 DEFUNX ("tmpnam", Ftmpnam, args, , |
3372 | 1855 "-*- texinfo -*-\n\ |
4267 | 1856 @deftypefn {Built-in Function} {} tmpnam (@var{dir}, @var{prefix})\n\ |
3372 | 1857 Return a unique temporary file name as a string.\n\ |
1858 \n\ | |
4267 | 1859 If @var{prefix} is omitted, a value of @code{\"oct-\"} is used.\n\ |
1860 If @var{dir} is also omitted, the default directory for temporary files\n\ | |
1861 is used. If @var{dir} is provided, it must exist, otherwise the default\n\ | |
1862 directory for temporary files is used. Since the named file is not\n\ | |
1863 opened, by @code{tmpnam}, it is possible (though relatively unlikely)\n\ | |
1864 that it will not be available by the time your program attempts to open it.\n\ | |
5642 | 1865 @seealso{tmpfile, mkstemp, P_tmpdir}\n\ |
1866 @end deftypefn") | |
1802 | 1867 { |
2095 | 1868 octave_value retval; |
1802 | 1869 |
2936 | 1870 int len = args.length (); |
1871 | |
1872 if (len < 3) | |
1873 { | |
3523 | 1874 std::string dir = len > 0 ? args(0).string_value () : std::string (); |
2936 | 1875 |
1876 if (! error_state) | |
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1877 { |
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1878 std::string pfx |
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1879 = len > 1 ? args(1).string_value () : std::string ("oct-"); |
4267 | 1880 |
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1881 if (! error_state) |
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1882 retval = octave_tempnam (dir, pfx); |
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1883 else |
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1884 ::error ("expecting second argument to be a string"); |
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1885 } |
4267 | 1886 else |
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1887 ::error ("expecting first argument to be a string"); |
2936 | 1888 } |
1802 | 1889 else |
5823 | 1890 print_usage (); |
1802 | 1891 |
1892 return retval; | |
1893 } | |
1894 | |
2458 | 1895 DEFALIAS (octave_tmp_file_name, tmpnam); |
1896 | |
4326 | 1897 DEFUN (tmpfile, args, , |
1898 "-*- texinfo -*-\n\ | |
1899 @deftypefn {Built-in Function} {[@var{fid}, @var{msg}] =} tmpfile ()\n\ | |
1900 Return the file ID corresponding to a new temporary file with a unique\n\ | |
1901 name. The file is opened in binary read/write (@code{\"w+b\"}) mode.\n\ | |
1902 The file will be deleted automatically when it is closed or when Octave\n\ | |
1903 exits.\n\ | |
1904 \n\ | |
1905 If successful, @var{fid} is a valid file ID and @var{msg} is an empty\n\ | |
1906 string. Otherwise, @var{fid} is -1 and @var{msg} contains a\n\ | |
1907 system-dependent error message.\n\ | |
5642 | 1908 @seealso{tmpnam, mkstemp, P_tmpdir}\n\ |
1909 @end deftypefn") | |
4326 | 1910 { |
1911 octave_value_list retval; | |
1912 | |
1913 retval(1) = std::string (); | |
1914 retval(0) = -1; | |
1915 | |
1916 int nargin = args.length (); | |
1917 | |
1918 if (nargin == 0) | |
1919 { | |
1920 FILE *fid = tmpfile (); | |
1921 | |
1922 if (fid) | |
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1923 { |
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1924 std::string nm; |
4326 | 1925 |
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1926 std::ios::openmode md = fopen_mode_to_ios_mode ("w+b"); |
4326 | 1927 |
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1928 octave_stream s = octave_stdiostream::create (nm, fid, md); |
4326 | 1929 |
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1930 if (s) |
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1931 retval(0) = octave_stream_list::insert (s); |
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1932 else |
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1933 error ("tmpfile: failed to create octave_stdiostream object"); |
4326 | 1934 |
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1935 } |
4326 | 1936 else |
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1937 { |
10411 | 1938 retval(1) = gnulib::strerror (errno); |
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1939 retval(0) = -1; |
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1940 } |
4326 | 1941 } |
1942 else | |
5823 | 1943 print_usage (); |
4326 | 1944 |
1945 return retval; | |
1946 } | |
1947 | |
1948 DEFUN (mkstemp, args, , | |
1949 "-*- texinfo -*-\n\ | |
5109 | 1950 @deftypefn {Built-in Function} {[@var{fid}, @var{name}, @var{msg}] =} mkstemp (@var{template}, @var{delete})\n\ |
4326 | 1951 Return the file ID corresponding to a new temporary file with a unique\n\ |
1952 name created from @var{template}. The last six characters of @var{template}\n\ | |
5016 | 1953 must be @code{XXXXXX} and these are replaced with a string that makes the\n\ |
4326 | 1954 filename unique. The file is then created with mode read/write and\n\ |
1955 permissions that are system dependent (on GNU/Linux systems, the permissions\n\ | |
1956 will be 0600 for versions of glibc 2.0.7 and later). The file is opened\n\ | |
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1957 with the @w{@code{O_EXCL}} flag.\n\ |
4326 | 1958 \n\ |
1959 If the optional argument @var{delete} is supplied and is true,\n\ | |
1960 the file will be deleted automatically when Octave exits, or when\n\ | |
1961 the function @code{purge_tmp_files} is called.\n\ | |
1962 \n\ | |
1963 If successful, @var{fid} is a valid file ID, @var{name} is the name of\n\ | |
7001 | 1964 the file, and @var{msg} is an empty string. Otherwise, @var{fid}\n\ |
4326 | 1965 is -1, @var{name} is empty, and @var{msg} contains a system-dependent\n\ |
1966 error message.\n\ | |
5642 | 1967 @seealso{tmpfile, tmpnam, P_tmpdir}\n\ |
1968 @end deftypefn") | |
4326 | 1969 { |
1970 octave_value_list retval; | |
1971 | |
1972 retval(2) = std::string (); | |
1973 retval(1) = std::string (); | |
1974 retval(0) = -1; | |
1975 | |
1976 int nargin = args.length (); | |
1977 | |
1978 if (nargin == 1 || nargin == 2) | |
1979 { | |
1980 std::string tmpl8 = args(0).string_value (); | |
1981 | |
1982 if (! error_state) | |
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1983 { |
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1984 OCTAVE_LOCAL_BUFFER (char, tmp, tmpl8.size () + 1); |
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1985 strcpy (tmp, tmpl8.c_str ()); |
4326 | 1986 |
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1987 int fd = mkstemp (tmp); |
4326 | 1988 |
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1989 if (fd < 0) |
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1990 { |
10411 | 1991 retval(2) = gnulib::strerror (errno); |
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1992 retval(0) = fd; |
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1993 } |
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1994 else |
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1995 { |
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1996 const char *fopen_mode = "w+"; |
4326 | 1997 |
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1998 FILE *fid = fdopen (fd, fopen_mode); |
4326 | 1999 |
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2000 if (fid) |
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2001 { |
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2002 std::string nm = tmp; |
4326 | 2003 |
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2004 std::ios::openmode md = fopen_mode_to_ios_mode (fopen_mode); |
4326 | 2005 |
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2006 octave_stream s = octave_stdiostream::create (nm, fid, md); |
4326 | 2007 |
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2008 if (s) |
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2009 { |
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2010 retval(1) = nm; |
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2011 retval(0) = octave_stream_list::insert (s); |
4326 | 2012 |
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2013 if (nargin == 2 && args(1).is_true ()) |
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2014 mark_for_deletion (nm); |
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2015 } |
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2016 else |
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2017 error ("mkstemp: failed to create octave_stdiostream object"); |
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2018 } |
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2019 else |
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2020 { |
10411 | 2021 retval(2) = gnulib::strerror (errno); |
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2022 retval(0) = -1; |
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2023 } |
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2024 } |
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2025 } |
4326 | 2026 else |
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2027 error ("mkstemp: expecting string as first argument"); |
4326 | 2028 } |
2029 else | |
5823 | 2030 print_usage (); |
4326 | 2031 |
2032 return retval; | |
2033 } | |
2034 | |
1400 | 2035 static int |
2036 convert (int x, int ibase, int obase) | |
2037 { | |
2038 int retval = 0; | |
2039 | |
2040 int tmp = x % obase; | |
2041 | |
2042 if (tmp > ibase - 1) | |
2095 | 2043 ::error ("umask: invalid digit"); |
1400 | 2044 else |
2045 { | |
2046 retval = tmp; | |
2047 int mult = ibase; | |
2048 while ((x = (x - tmp) / obase)) | |
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2049 { |
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2050 tmp = x % obase; |
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2051 if (tmp > ibase - 1) |
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2052 { |
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2053 ::error ("umask: invalid digit"); |
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2054 break; |
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2055 } |
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2056 retval += mult * tmp; |
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2057 mult *= ibase; |
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2058 } |
1400 | 2059 } |
2060 | |
2061 return retval; | |
2062 } | |
2063 | |
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2064 DEFUNX ("umask", Fumask, args, , |
3301 | 2065 "-*- texinfo -*-\n\ |
2066 @deftypefn {Built-in Function} {} umask (@var{mask})\n\ | |
2067 Set the permission mask for file creation. The parameter @var{mask}\n\ | |
4715 | 2068 is an integer, interpreted as an octal number. If successful,\n\ |
2069 returns the previous value of the mask (as an integer to be\n\ | |
2070 interpreted as an octal number); otherwise an error message is printed.\n\ | |
3301 | 2071 @end deftypefn") |
1400 | 2072 { |
2095 | 2073 octave_value_list retval; |
1400 | 2074 |
2075 int status = 0; | |
2076 | |
2077 if (args.length () == 1) | |
2078 { | |
3202 | 2079 int mask = args(0).int_value (true); |
1400 | 2080 |
3202 | 2081 if (! error_state) |
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2082 { |
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2083 if (mask < 0) |
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2084 { |
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2085 status = -1; |
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2086 ::error ("umask: MASK must be a positive integer value"); |
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2087 } |
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2088 else |
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2089 { |
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2090 int oct_mask = convert (mask, 8, 10); |
1400 | 2091 |
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2092 if (! error_state) |
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2093 status = convert (octave_umask (oct_mask), 10, 8); |
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2094 } |
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2095 } |
3202 | 2096 else |
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2097 { |
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2098 status = -1; |
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2099 ::error ("umask: expecting integer argument"); |
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2100 } |
1400 | 2101 } |
2102 else | |
5823 | 2103 print_usage (); |
1400 | 2104 |
2105 if (status >= 0) | |
4233 | 2106 retval(0) = status; |
1400 | 2107 |
2108 return retval; | |
2109 } | |
2110 | |
5749 | 2111 static octave_value |
6483 | 2112 const_value (const char *, const octave_value_list& args, int val) |
2189 | 2113 { |
5749 | 2114 octave_value retval; |
2115 | |
2116 int nargin = args.length (); | |
2117 | |
2118 if (nargin == 0) | |
2119 retval = val; | |
2120 else | |
5823 | 2121 print_usage (); |
5749 | 2122 |
2123 return retval; | |
2124 } | |
2125 | |
4267 | 2126 #if ! defined (P_tmpdir) |
2127 #define P_tmpdir "/tmp" | |
2128 #endif | |
2129 | |
5749 | 2130 DEFUNX ("P_tmpdir", FP_tmpdir, args, , |
2131 "-*- texinfo -*-\n\ | |
2132 @deftypefn {Built-in Function} {} P_tmpdir ()\n\ | |
2133 Return the default name of the directory for temporary files on\n\ | |
2134 this system. The name of this directory is system dependent.\n\ | |
2135 @end deftypefn") | |
2136 { | |
2137 octave_value retval; | |
2138 | |
2139 int nargin = args.length (); | |
4267 | 2140 |
5749 | 2141 if (nargin == 0) |
2142 retval = P_tmpdir; | |
2143 else | |
5823 | 2144 print_usage (); |
5749 | 2145 |
2146 return retval; | |
2147 } | |
2341 | 2148 |
5749 | 2149 // NOTE: the values of SEEK_SET, SEEK_CUR, and SEEK_END have to be |
2150 // this way for Matlab compatibility. | |
2151 | |
2152 DEFUNX ("SEEK_SET", FSEEK_SET, args, , | |
2153 "-*- texinfo -*-\n\ | |
10840 | 2154 @deftypefn {Built-in Function} {} SEEK_SET ()\n\ |
5749 | 2155 @deftypefnx {Built-in Function} {} SEEK_CUR ()\n\ |
2156 @deftypefnx {Built-in Function} {} SEEK_END ()\n\ | |
2157 Return the value required to request that @code{fseek} perform\n\ | |
2158 one of the following actions:\n\ | |
3372 | 2159 @table @code\n\ |
2160 @item SEEK_SET\n\ | |
2161 Position file relative to the beginning.\n\ | |
2162 \n\ | |
2163 @item SEEK_CUR\n\ | |
2164 Position file relative to the current position.\n\ | |
2165 \n\ | |
2166 @item SEEK_END\n\ | |
5749 | 2167 Position file relative to the end.\n\ |
3372 | 2168 @end table\n\ |
5749 | 2169 @end deftypefn") |
2170 { | |
2171 return const_value ("SEEK_SET", args, -1); | |
2172 } | |
2189 | 2173 |
5749 | 2174 DEFUNX ("SEEK_CUR", FSEEK_CUR, args, , |
2175 "-*- texinfo -*-\n\ | |
2176 @deftypefn {Built-in Function} {} SEEK_CUR ()\n\ | |
3458 | 2177 See SEEK_SET.\n\ |
5749 | 2178 @end deftypefn") |
2179 { | |
2180 return const_value ("SEEK_CUR", args, 0); | |
2181 } | |
2189 | 2182 |
5749 | 2183 DEFUNX ("SEEK_END", FSEEK_END, args, , |
2184 "-*- texinfo -*-\n\ | |
2185 @deftypefn {Built-in Function} {} SEEK_END ()\n\ | |
3458 | 2186 See SEEK_SET.\n\ |
5749 | 2187 @end deftypefn") |
2188 { | |
2189 return const_value ("SEEK_END", args, 1); | |
2190 } | |
2191 | |
2192 static octave_value | |
6483 | 2193 const_value (const char *, const octave_value_list& args, |
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2194 const octave_value& val) |
5749 | 2195 { |
2196 octave_value retval; | |
2197 | |
2198 int nargin = args.length (); | |
2189 | 2199 |
5749 | 2200 if (nargin == 0) |
2201 retval = val; | |
2202 else | |
5823 | 2203 print_usage (); |
5749 | 2204 |
2205 return retval; | |
2206 } | |
2207 | |
2208 DEFUNX ("stdin", Fstdin, args, , | |
2209 "-*- texinfo -*-\n\ | |
2210 @deftypefn {Built-in Function} {} stdin ()\n\ | |
2211 Return the numeric value corresponding to the standard input stream.\n\ | |
2212 When Octave is used interactively, this is filtered through the command\n\ | |
2213 line editing functions.\n\ | |
5333 | 2214 @seealso{stdout, stderr}\n\ |
5749 | 2215 @end deftypefn") |
2216 { | |
2217 return const_value ("stdin", args, stdin_file); | |
2218 } | |
2189 | 2219 |
5749 | 2220 DEFUNX ("stdout", Fstdout, args, , |
2221 "-*- texinfo -*-\n\ | |
2222 @deftypefn {Built-in Function} {} stdout ()\n\ | |
2223 Return the numeric value corresponding to the standard output stream.\n\ | |
2224 Data written to the standard output is normally filtered through the pager.\n\ | |
5333 | 2225 @seealso{stdin, stderr}\n\ |
5749 | 2226 @end deftypefn") |
2227 { | |
2228 return const_value ("stdout", args, stdout_file); | |
2229 } | |
2189 | 2230 |
5749 | 2231 DEFUNX ("stderr", Fstderr, args, , |
2232 "-*- texinfo -*-\n\ | |
2233 @deftypefn {Built-in Function} {} stderr ()\n\ | |
2234 Return the numeric value corresponding to the standard error stream.\n\ | |
2235 Even if paging is turned on, the standard error is not sent to the\n\ | |
2236 pager. It is useful for error messages and prompts.\n\ | |
5333 | 2237 @seealso{stdin, stdout}\n\ |
5749 | 2238 @end deftypefn") |
2239 { | |
2240 return const_value ("stderr", args, stderr_file); | |
2189 | 2241 } |