Mercurial > octave
annotate libinterp/corefcn/file-io.cc @ 20846:f2cd811f0f9e
maint: Refactor C++ calls to print_usage to resemble m-files (2015 code sprint)
* file-io.cc (Ffopen): Move nargin checking to the top of the function.
author | Mike Miller <mtmiller@octave.org> |
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date | Sat, 12 Dec 2015 09:32:37 -0500 |
parents | f428cbe7576f |
children | 1142cf6abc0d |
rev | line source |
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1 | 1 /* |
2 | |
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maint: Update copyright notices for 2015.
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3 Copyright (C) 1993-2015 John W. Eaton |
1 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
1 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1 | 20 |
21 */ | |
22 | |
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> |
42 #include <cstdio> | |
1343 | 43 |
3503 | 44 #include <iostream> |
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45 #include <limits> |
7336 | 46 #include <stack> |
4726 | 47 #include <vector> |
1350 | 48 |
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49 #include <fcntl.h> |
1230 | 50 #include <sys/types.h> |
1 | 51 #include <unistd.h> |
1350 | 52 |
5325 | 53 #ifdef HAVE_ZLIB_H |
54 #include <zlib.h> | |
55 #endif | |
56 | |
5102 | 57 #include "error.h" |
2926 | 58 #include "file-ops.h" |
6159 | 59 #include "file-stat.h" |
5102 | 60 #include "lo-ieee.h" |
6159 | 61 #include "oct-env.h" |
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62 #include "oct-locbuf.h" |
2926 | 63 |
1352 | 64 #include "defun.h" |
6108 | 65 #include "file-io.h" |
6159 | 66 #include "load-path.h" |
2095 | 67 #include "oct-fstrm.h" |
68 #include "oct-iostrm.h" | |
1377 | 69 #include "oct-map.h" |
1750 | 70 #include "oct-obj.h" |
2095 | 71 #include "oct-prcstrm.h" |
72 #include "oct-stream.h" | |
73 #include "oct-strstrm.h" | |
1 | 74 #include "pager.h" |
444 | 75 #include "sysdep.h" |
1352 | 76 #include "utils.h" |
2370 | 77 #include "variables.h" |
1583 | 78 |
2902 | 79 static octave_value stdin_file; |
80 static octave_value stdout_file; | |
81 static octave_value stderr_file; | |
82 | |
4468 | 83 static octave_stream stdin_stream; |
84 static octave_stream stdout_stream; | |
85 static octave_stream stderr_stream; | |
86 | |
1 | 87 void |
164 | 88 initialize_file_io (void) |
1 | 89 { |
4468 | 90 stdin_stream = octave_istream::create (&std::cin, "stdin"); |
2116 | 91 |
3531 | 92 // This uses octave_stdout (see pager.h), not std::cout so that Octave's |
2116 | 93 // standard output stream will pass through the pager. |
94 | |
4468 | 95 stdout_stream = octave_ostream::create (&octave_stdout, "stdout"); |
2116 | 96 |
4468 | 97 stderr_stream = octave_ostream::create (&std::cerr, "stderr"); |
1 | 98 |
2902 | 99 stdin_file = octave_stream_list::insert (stdin_stream); |
100 stdout_file = octave_stream_list::insert (stdout_stream); | |
101 stderr_file = octave_stream_list::insert (stderr_stream); | |
1 | 102 } |
103 | |
2095 | 104 void |
105 close_files (void) | |
1 | 106 { |
2095 | 107 octave_stream_list::clear (); |
108 } | |
636 | 109 |
5102 | 110 // List of files to delete when we exit or crash. |
111 // | |
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112 // FIXME: this should really be static, |
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113 // but that causes problems on some systems. |
5102 | 114 std::stack <std::string> tmp_files; |
115 | |
116 void | |
117 mark_for_deletion (const std::string& file) | |
118 { | |
119 tmp_files.push (file); | |
120 } | |
121 | |
122 void | |
123 cleanup_tmp_files (void) | |
124 { | |
125 while (! tmp_files.empty ()) | |
126 { | |
127 std::string filename = tmp_files.top (); | |
128 tmp_files.pop (); | |
10411 | 129 gnulib::unlink (filename.c_str ()); |
5102 | 130 } |
131 } | |
132 | |
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133 static void |
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134 normalize_fopen_mode (std::string& mode, bool& use_zlib) |
1 | 135 { |
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136 use_zlib = false; |
896 | 137 |
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138 if (! mode.empty ()) |
368 | 139 { |
2095 | 140 // Could probably be faster, but does it really matter? |
1766 | 141 |
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142 // Accept 'W', 'R', and 'A' as 'w', 'r', and 'a' but we warn about |
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143 // them because Matlab says they don't perform "automatic |
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144 // flushing" but we don't know precisely what action that implies. |
7078 | 145 |
146 size_t pos = mode.find ('W'); | |
147 | |
8021 | 148 if (pos != std::string::npos) |
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149 { |
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150 warning_with_id ("Octave:fopen-mode", |
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151 "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_with_id ("Octave:fopen-mode", |
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160 "fopen: treating mode \"R\" as equivalent to \"r\""); |
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161 mode[pos] = 'r'; |
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162 } |
7078 | 163 |
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164 pos = mode.find ('A'); |
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165 |
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166 if (pos != std::string::npos) |
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167 { |
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168 warning_with_id ("Octave:fopen-mode", |
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169 "fopen: treating mode \"A\" as equivalent to \"a\""); |
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170 mode[pos] = 'a'; |
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171 } |
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172 |
7078 | 173 pos = mode.find ('z'); |
5325 | 174 |
8021 | 175 if (pos != std::string::npos) |
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176 { |
5325 | 177 #if defined (HAVE_ZLIB) |
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178 use_zlib = true; |
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179 mode.erase (pos, 1); |
5325 | 180 #else |
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181 error ("this version of Octave does not support gzipped files"); |
5325 | 182 #endif |
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183 } |
5325 | 184 |
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185 // Use binary mode if 't' is not specified, but don't add |
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186 // 'b' if it is already present. |
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187 |
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188 size_t bpos = mode.find ('b'); |
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189 size_t tpos = mode.find ('t'); |
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190 |
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191 if (bpos == std::string::npos && tpos == std::string::npos) |
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192 mode += 'b'; |
1 | 193 } |
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194 } |
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195 |
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196 static std::ios::openmode |
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197 fopen_mode_to_ios_mode (const std::string& mode) |
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198 { |
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199 std::ios::openmode retval = std::ios::in; |
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200 |
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201 if (mode == "rt") |
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202 retval = std::ios::in; |
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203 else if (mode == "wt") |
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204 retval = std::ios::out | std::ios::trunc; |
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205 else if (mode == "at") |
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206 retval = std::ios::out | std::ios::app; |
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207 else if (mode == "r+t" || mode == "rt+") |
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208 retval = std::ios::in | std::ios::out; |
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209 else if (mode == "w+t" || mode == "wt+") |
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210 retval = std::ios::in | std::ios::out | std::ios::trunc; |
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211 else if (mode == "a+t" || mode == "at+") |
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212 retval = std::ios::in | std::ios::out | std::ios::app; |
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213 else if (mode == "rb" || mode == "r") |
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214 retval = std::ios::in | std::ios::binary; |
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215 else if (mode == "wb" || mode == "w") |
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216 retval = std::ios::out | std::ios::trunc | std::ios::binary; |
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217 else if (mode == "ab" || mode == "a") |
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218 retval = std::ios::out | std::ios::app | std::ios::binary; |
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219 else if (mode == "r+b" || mode == "rb+" || mode == "r+") |
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220 retval = std::ios::in | std::ios::out | std::ios::binary; |
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221 else if (mode == "w+b" || mode == "wb+" || mode == "w+") |
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222 retval = (std::ios::in | std::ios::out | std::ios::trunc |
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223 | std::ios::binary); |
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224 else if (mode == "a+b" || mode == "ab+" || mode == "a+") |
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225 retval = (std::ios::in | std::ios::out | std::ios::app |
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226 | std::ios::binary); |
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227 else |
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228 error ("invalid mode specified"); |
1 | 229 |
230 return retval; | |
231 } | |
232 | |
1957 | 233 DEFUN (fclose, args, , |
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234 "-*- texinfo -*-\n\ |
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235 @deftypefn {Built-in Function} {} fclose (@var{fid})\n\ |
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236 @deftypefnx {Built-in Function} {} fclose (\"all\")\n\ |
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237 @deftypefnx {Built-in Function} {@var{status} =} fclose (\"all\")\n\ |
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238 Close the file specified by the file descriptor @var{fid}.\n\ |
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239 \n\ |
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240 If successful, @code{fclose} returns 0, otherwise, it returns -1. The\n\ |
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241 second form of the @code{fclose} call closes all open files except\n\ |
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242 @code{stdin}, @code{stdout}, @code{stderr}, and any FIDs associated\n\ |
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243 with gnuplot.\n\ |
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244 @seealso{fopen, fflush, freport}\n\ |
5642 | 245 @end deftypefn") |
529 | 246 { |
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247 if (args.length () != 1) |
5823 | 248 print_usage (); |
1 | 249 |
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250 return octave_value (octave_stream_list::remove (args(0), "fclose")); |
1 | 251 } |
252 | |
5144 | 253 DEFUN (fclear, args, , |
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254 "-*- texinfo -*-\n\ |
5144 | 255 @deftypefn {Built-in Function} {} fclear (@var{fid})\n\ |
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256 Clear the stream state for the file specified by the file descriptor\n\ |
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257 @var{fid}.\n\ |
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258 @seealso{ferror, fopen}\n\ |
5144 | 259 @end deftypefn") |
260 { | |
261 octave_value retval; | |
262 | |
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263 if (args.length () != 1) |
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264 print_usage (); |
5144 | 265 |
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266 int fid = octave_stream_list::get_file_number (args(0)); |
5144 | 267 |
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268 octave_stream os = octave_stream_list::lookup (fid, "fclear"); |
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269 |
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270 os.clearerr (); |
5144 | 271 |
272 return retval; | |
273 } | |
274 | |
1957 | 275 DEFUN (fflush, args, , |
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276 "-*- texinfo -*-\n\ |
3372 | 277 @deftypefn {Built-in Function} {} fflush (@var{fid})\n\ |
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278 Flush output to file descriptor @var{fid}.\n\ |
5095 | 279 \n\ |
280 @code{fflush} returns 0 on success and an OS dependent error value\n\ | |
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281 (@minus{}1 on Unix) on error.\n\ |
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282 \n\ |
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283 Programming Note: Flushing is useful for ensuring that all pending output\n\ |
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284 makes it to the screen before some other event occurs. For example, it is\n\ |
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285 always a good idea to flush the standard output stream before calling\n\ |
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286 @code{input}.\n\ |
5642 | 287 @seealso{fopen, fclose}\n\ |
288 @end deftypefn") | |
1181 | 289 { |
4233 | 290 octave_value retval = -1; |
1181 | 291 |
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292 if (args.length () != 1) |
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293 print_usage (); |
1181 | 294 |
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295 // FIXME: any way to avoid special case for stdout? |
2609 | 296 |
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297 int fid = octave_stream_list::get_file_number (args(0)); |
2095 | 298 |
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299 if (fid == 1) |
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300 { |
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301 flush_octave_stdout (); |
2609 | 302 |
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303 retval = 0; |
2095 | 304 } |
305 else | |
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306 { |
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307 octave_stream os = octave_stream_list::lookup (fid, "fflush"); |
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308 |
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309 retval = os.flush (); |
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310 } |
1181 | 311 |
312 return retval; | |
313 } | |
314 | |
2095 | 315 DEFUN (fgetl, args, , |
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316 "-*- texinfo -*-\n\ |
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317 @deftypefn {Built-in Function} {@var{str} =} fgetl (@var{fid})\n\ |
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318 @deftypefnx {Built-in Function} {@var{str} =} fgetl (@var{fid}, @var{len})\n\ |
3372 | 319 Read characters from a file, stopping after a newline, or EOF,\n\ |
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320 or @var{len} characters have been read.\n\ |
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321 \n\ |
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322 The characters read, excluding the possible trailing newline, are returned\n\ |
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323 as a string.\n\ |
1339 | 324 \n\ |
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325 If @var{len} is omitted, @code{fgetl} reads until the next newline character.\n\ |
3372 | 326 \n\ |
327 If there are no more characters to read, @code{fgetl} returns @minus{}1.\n\ | |
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328 \n\ |
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329 To read a line and return the terminating newline see @code{fgets}.\n\ |
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330 @seealso{fgets, fscanf, fread, fopen}\n\ |
5642 | 331 @end deftypefn") |
1339 | 332 { |
4468 | 333 static std::string who = "fgetl"; |
334 | |
2599 | 335 octave_value_list retval; |
336 | |
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337 int nargin = args.length (); |
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338 |
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339 if (nargin < 1 || nargin > 2) |
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340 print_usage (); |
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341 |
4233 | 342 retval(1) = 0; |
343 retval(0) = -1; | |
1339 | 344 |
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345 octave_stream os = octave_stream_list::lookup (args(0), who); |
1339 | 346 |
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347 octave_value len_arg = (nargin == 2) ? args(1) : octave_value (); |
2095 | 348 |
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349 bool err = false; |
2095 | 350 |
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351 std::string tmp = os.getl (len_arg, err, who); |
2095 | 352 |
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353 if (! err) |
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354 { |
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355 retval(1) = tmp.length (); |
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356 retval(0) = tmp; |
2095 | 357 } |
1339 | 358 |
359 return retval; | |
360 } | |
361 | |
2095 | 362 DEFUN (fgets, args, , |
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363 "-*- texinfo -*-\n\ |
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364 @deftypefn {Built-in Function} {@var{str} =} fgets (@var{fid})\n\ |
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365 @deftypefnx {Built-in Function} {@var{str} =} fgets (@var{fid}, @var{len})\n\ |
3372 | 366 Read characters from a file, stopping after a newline, or EOF,\n\ |
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367 or @var{len} characters have been read.\n\ |
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368 \n\ |
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369 The characters read, including the possible trailing newline, are returned\n\ |
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370 as a string.\n\ |
529 | 371 \n\ |
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372 If @var{len} is omitted, @code{fgets} reads until the next newline character.\n\ |
3372 | 373 \n\ |
374 If there are no more characters to read, @code{fgets} returns @minus{}1.\n\ | |
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375 \n\ |
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376 To read a line and discard the terminating newline see @code{fgetl}.\n\ |
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377 @seealso{fputs, fgetl, fscanf, fread, fopen}\n\ |
5642 | 378 @end deftypefn") |
529 | 379 { |
4468 | 380 static std::string who = "fgets"; |
381 | |
2599 | 382 octave_value_list retval; |
383 | |
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384 int nargin = args.length (); |
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385 |
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386 if (nargin < 1 || nargin > 2) |
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387 print_usage (); |
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388 |
2599 | 389 retval(1) = 0.0; |
390 retval(0) = -1.0; | |
529 | 391 |
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392 octave_stream os = octave_stream_list::lookup (args(0), who); |
529 | 393 |
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394 octave_value len_arg = (nargin == 2) ? args(1) : octave_value (); |
2095 | 395 |
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396 bool err = false; |
2095 | 397 |
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398 std::string tmp = os.gets (len_arg, err, who); |
2095 | 399 |
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400 if (! err) |
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401 { |
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402 retval(1) = tmp.length (); |
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403 retval(0) = tmp; |
2095 | 404 } |
529 | 405 |
406 return retval; | |
407 } | |
408 | |
9701 | 409 DEFUN (fskipl, args, , |
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410 "-*- texinfo -*-\n\ |
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411 @deftypefn {Built-in Function} {@var{nlines} =} fskipl (@var{fid})\n\ |
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412 @deftypefnx {Built-in Function} {@var{nlines} =} fskipl (@var{fid}, @var{count})\n\ |
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413 @deftypefnx {Built-in Function} {@var{nlines} =} fskipl (@var{fid}, Inf)\n\ |
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414 Read and skip @var{count} lines from the file specified by the file\n\ |
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415 descriptor @var{fid}.\n\ |
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416 \n\ |
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417 @code{fskipl} discards characters until an end-of-line is encountered exactly\n\ |
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418 @var{count}-times, or until the end-of-file marker is found.\n\ |
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419 \n\ |
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420 If @var{count} is omitted, it defaults to 1. @var{count} may also be\n\ |
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421 @code{Inf}, in which case lines are skipped until the end of the file.\n\ |
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422 This form is suitable for counting the number of lines in a file.\n\ |
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423 \n\ |
9701 | 424 Returns the number of lines skipped (end-of-line sequences encountered).\n\ |
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425 @seealso{fgetl, fgets, fscanf, fopen}\n\ |
9701 | 426 @end deftypefn") |
427 { | |
428 static std::string who = "fskipl"; | |
429 | |
430 octave_value retval; | |
431 | |
432 int nargin = args.length (); | |
433 | |
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434 if (nargin < 1 || nargin > 2) |
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435 print_usage (); |
9701 | 436 |
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437 octave_stream os = octave_stream_list::lookup (args(0), who); |
9701 | 438 |
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439 octave_value count_arg = (nargin == 2) ? args(1) : octave_value (); |
9701 | 440 |
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441 bool err = false; |
9701 | 442 |
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443 off_t tmp = os.skipl (count_arg, err, who); |
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444 |
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445 if (! err) |
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446 retval = tmp; |
9701 | 447 |
448 return retval; | |
449 } | |
450 | |
451 | |
3340 | 452 static octave_stream |
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453 do_stream_open (const std::string& name, const std::string& mode_arg, |
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454 const std::string& arch, int& fid) |
1 | 455 { |
3340 | 456 octave_stream retval; |
1 | 457 |
2095 | 458 fid = -1; |
1 | 459 |
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460 std::string mode = mode_arg; |
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461 bool use_zlib = false; |
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462 normalize_fopen_mode (mode, use_zlib); |
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463 |
4036 | 464 std::ios::openmode md = fopen_mode_to_ios_mode (mode); |
1 | 465 |
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466 oct_mach_info::float_format flt_fmt = |
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467 oct_mach_info::string_to_float_format (arch); |
1 | 468 |
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469 std::string fname = file_ops::tilde_expand (name); |
6159 | 470 |
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471 file_stat fs (fname); |
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472 |
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473 if (! (md & std::ios::out)) |
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474 fname = find_data_file_in_load_path ("fopen", fname); |
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475 |
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476 if (! fs.is_dir ()) |
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477 { |
6905 | 478 #if defined (HAVE_ZLIB) |
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479 if (use_zlib) |
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480 { |
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481 FILE *fptr = gnulib::fopen (fname.c_str (), mode.c_str ()); |
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482 |
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483 int fd = fileno (fptr); |
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484 |
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485 gzFile gzf = ::gzdopen (fd, mode.c_str ()); |
5325 | 486 |
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487 if (fptr) |
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488 retval = octave_zstdiostream::create (fname, gzf, fd, |
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489 md, flt_fmt); |
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490 else |
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491 retval.error (gnulib::strerror (errno)); |
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492 } |
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493 else |
5325 | 494 #endif |
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495 { |
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496 FILE *fptr = gnulib::fopen (fname.c_str (), mode.c_str ()); |
5370 | 497 |
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498 retval = octave_stdiostream::create (fname, fptr, md, |
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499 flt_fmt); |
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500 |
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501 if (! fptr) |
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502 retval.error (gnulib::strerror (errno)); |
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503 } |
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504 |
1 | 505 } |
506 | |
2095 | 507 return retval; |
508 } | |
1 | 509 |
3340 | 510 static octave_stream |
2095 | 511 do_stream_open (const octave_value& tc_name, const octave_value& tc_mode, |
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512 const octave_value& tc_arch, const char *fcn, int& fid) |
2095 | 513 { |
3340 | 514 octave_stream retval; |
2095 | 515 |
516 fid = -1; | |
517 | |
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518 std::string name = tc_name.xstring_value ("%s: filename must be a string", fcn); |
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519 std::string mode = tc_mode.xstring_value ("%s: file mode must be a string", fcn); |
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520 std::string arch = tc_arch.xstring_value ("%s: architecture type must be a string", fcn); |
1 | 521 |
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522 retval = do_stream_open (name, mode, arch, fid); |
1 | 523 |
524 return retval; | |
525 } | |
526 | |
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527 DEFUN (fopen, args, nargout, |
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528 "-*- texinfo -*-\n\ |
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529 @deftypefn {Built-in Function} {@var{fid} =} fopen (@var{name})\n\ |
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530 @deftypefnx {Built-in Function} {@var{fid} =} fopen (@var{name}, @var{mode})\n\ |
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531 @deftypefnx {Built-in Function} {@var{fid} =} fopen (@var{name}, @var{mode}, @var{arch})\n\ |
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532 @deftypefnx {Built-in Function} {[@var{fid}, @var{msg}] =} fopen (@dots{})\n\ |
3372 | 533 @deftypefnx {Built-in Function} {@var{fid_list} =} fopen (\"all\")\n\ |
5353 | 534 @deftypefnx {Built-in Function} {[@var{file}, @var{mode}, @var{arch}] =} fopen (@var{fid})\n\ |
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535 Open a file for low-level I/O or query open files and file descriptors.\n\ |
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536 \n\ |
3372 | 537 The first form of the @code{fopen} function opens the named file with\n\ |
538 the specified mode (read-write, read-only, etc.) and architecture\n\ | |
539 interpretation (IEEE big endian, IEEE little endian, etc.), and returns\n\ | |
540 an integer value that may be used to refer to the file later. If an\n\ | |
541 error occurs, @var{fid} is set to @minus{}1 and @var{msg} contains the\n\ | |
542 corresponding system error message. The @var{mode} is a one or two\n\ | |
543 character string that specifies whether the file is to be opened for\n\ | |
544 reading, writing, or both.\n\ | |
1181 | 545 \n\ |
3372 | 546 The second form of the @code{fopen} function returns a vector of file ids\n\ |
547 corresponding to all the currently open files, excluding the\n\ | |
548 @code{stdin}, @code{stdout}, and @code{stderr} streams.\n\ | |
2318 | 549 \n\ |
5353 | 550 The third form of the @code{fopen} function returns information about the\n\ |
551 open file given its file id.\n\ | |
1181 | 552 \n\ |
3372 | 553 For example,\n\ |
554 \n\ | |
555 @example\n\ | |
556 myfile = fopen (\"splat.dat\", \"r\", \"ieee-le\");\n\ | |
557 @end example\n\ | |
2095 | 558 \n\ |
3372 | 559 @noindent\n\ |
560 opens the file @file{splat.dat} for reading. If necessary, binary\n\ | |
561 numeric values will be read assuming they are stored in IEEE format with\n\ | |
562 the least significant bit first, and then converted to the native\n\ | |
563 representation.\n\ | |
2318 | 564 \n\ |
3372 | 565 Opening a file that is already open simply opens it again and returns a\n\ |
566 separate file id. It is not an error to open a file several times,\n\ | |
567 though writing to the same file through several different file ids may\n\ | |
568 produce unexpected results.\n\ | |
569 \n\ | |
570 The possible values @samp{mode} may have are\n\ | |
571 \n\ | |
572 @table @asis\n\ | |
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573 @item @samp{r} (default)\n\ |
3372 | 574 Open a file for reading.\n\ |
3263 | 575 \n\ |
3372 | 576 @item @samp{w}\n\ |
7001 | 577 Open a file for writing. The previous contents are discarded.\n\ |
3372 | 578 \n\ |
579 @item @samp{a}\n\ | |
580 Open or create a file for writing at the end of the file.\n\ | |
581 \n\ | |
582 @item @samp{r+}\n\ | |
583 Open an existing file for reading and writing.\n\ | |
584 \n\ | |
585 @item @samp{w+}\n\ | |
586 Open a file for reading or writing. The previous contents are\n\ | |
587 discarded.\n\ | |
588 \n\ | |
589 @item @samp{a+}\n\ | |
590 Open or create a file for reading or writing at the end of the\n\ | |
591 file.\n\ | |
592 @end table\n\ | |
593 \n\ | |
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594 Append a @qcode{\"t\"} to the mode string to open the file in text mode or a\n\ |
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595 @qcode{\"b\"} to open in binary mode. On Windows and Macintosh systems, text\n\ |
4865 | 596 mode reading and writing automatically converts linefeeds to the\n\ |
597 appropriate line end character for the system (carriage-return linefeed\n\ | |
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598 on Windows, carriage-return on Macintosh). The default when no mode is\n\ |
4865 | 599 specified is binary mode.\n\ |
600 \n\ | |
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601 Additionally, you may append a @qcode{\"z\"} to the mode string to open a\n\ |
5325 | 602 gzipped file for reading or writing. For this to be successful, you\n\ |
603 must also open the file in binary mode.\n\ | |
604 \n\ | |
3372 | 605 The parameter @var{arch} is a string specifying the default data format\n\ |
606 for the file. Valid values for @var{arch} are:\n\ | |
2318 | 607 \n\ |
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608 @table @asis\n\ |
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609 @item @qcode{\"native\"} or @qcode{\"n\"} (default)\n\ |
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610 The format of the current machine.\n\ |
3372 | 611 \n\ |
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612 @item @qcode{\"ieee-be\"} or @qcode{\"b\"}\n\ |
3372 | 613 IEEE big endian format.\n\ |
614 \n\ | |
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615 @item @qcode{\"ieee-le\"} or @qcode{\"l\"}\n\ |
3372 | 616 IEEE little endian format.\n\ |
617 @end table\n\ | |
618 \n\ | |
619 @noindent\n\ | |
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620 However, conversions are currently only supported for @samp{native},\n\ |
3372 | 621 @samp{ieee-be}, and @samp{ieee-le} formats.\n\ |
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622 \n\ |
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623 When opening a new file that does not yet exist, permissions will be set to\n\ |
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624 @code{0666 - @var{umask}}.\n\ |
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625 @seealso{fclose, fgets, fgetl, fscanf, fread, fputs, fdisp, fprintf, fwrite, fskipl, fseek, frewind, ftell, feof, ferror, fclear, fflush, freport, umask}\n\ |
5642 | 626 @end deftypefn") |
529 | 627 { |
2599 | 628 octave_value_list retval; |
629 | |
630 retval(0) = -1.0; | |
529 | 631 |
632 int nargin = args.length (); | |
633 | |
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634 if (nargin < 1 || nargin > 4) |
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635 print_usage (); |
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636 |
2095 | 637 if (nargin == 1) |
638 { | |
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639 if (args(0).is_string ()) |
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640 { |
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641 // If there is only one argument and it is a string but it |
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642 // is not the string "all", we assume it is a file to open |
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643 // with MODE = "r". To open a file called "all", you have |
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644 // to supply more than one argument. |
3263 | 645 |
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646 if (nargout < 2 && args(0).string_value () == "all") |
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647 return octave_stream_list::open_file_numbers (); |
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648 } |
2095 | 649 else |
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650 { |
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651 string_vector tmp = octave_stream_list::get_info (args(0)); |
529 | 652 |
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653 retval(2) = tmp(2); |
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654 retval(1) = tmp(1); |
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655 retval(0) = tmp(0); |
3263 | 656 |
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657 return retval; |
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658 } |
1 | 659 } |
660 | |
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661 octave_value mode = (nargin == 2 || nargin == 3) |
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662 ? args(1) : octave_value ("r"); |
2095 | 663 |
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664 octave_value arch = (nargin == 3) |
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665 ? args(2) : octave_value ("native"); |
2095 | 666 |
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667 int fid = -1; |
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668 |
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669 octave_stream os = do_stream_open (args(0), mode, arch, "fopen", fid); |
5370 | 670 |
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671 if (os) |
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672 { |
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673 retval(1) = ""; |
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674 retval(0) = octave_stream_list::insert (os); |
2095 | 675 } |
676 else | |
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677 { |
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678 int error_number = 0; |
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679 |
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680 retval(1) = os.error (false, error_number); |
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681 retval(0) = -1.0; |
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682 } |
1 | 683 |
684 return retval; | |
685 } | |
686 | |
1957 | 687 DEFUN (freport, args, , |
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688 "-*- texinfo -*-\n\ |
3372 | 689 @deftypefn {Built-in Function} {} freport ()\n\ |
690 Print a list of which files have been opened, and whether they are open\n\ | |
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691 for reading, writing, or both.\n\ |
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692 \n\ |
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693 For example:\n\ |
3372 | 694 \n\ |
695 @example\n\ | |
696 @group\n\ | |
697 freport ()\n\ | |
698 \n\ | |
19123 | 699 @print{} number mode arch name\n\ |
700 @print{} ------ ---- ---- ----\n\ | |
701 @print{} 0 r ieee-le stdin\n\ | |
702 @print{} 1 w ieee-le stdout\n\ | |
703 @print{} 2 w ieee-le stderr\n\ | |
704 @print{} 3 r ieee-le myfile\n\ | |
3372 | 705 @end group\n\ |
706 @end example\n\ | |
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707 @seealso{fopen, fclose, is_valid_file_id}\n\ |
3372 | 708 @end deftypefn") |
1181 | 709 { |
2095 | 710 octave_value_list retval; |
1181 | 711 |
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712 if (args.length () > 0) |
1181 | 713 warning ("freport: ignoring extra arguments"); |
714 | |
2095 | 715 octave_stdout << octave_stream_list::list_open_files (); |
1181 | 716 |
717 return retval; | |
718 } | |
719 | |
4715 | 720 DEFUN (frewind, args, nargout, |
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721 "-*- texinfo -*-\n\ |
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722 @deftypefn {Built-in Function} {} frewind (@var{fid})\n\ |
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723 @deftypefnx {Built-in Function} {@var{status} =} frewind (@var{fid})\n\ |
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724 Move the file pointer to the beginning of the file specified by file\n\ |
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725 descriptor @var{fid}.\n\ |
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726 \n\ |
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727 @code{frewind} returns 0 for success, and -1 if an error is encountered. It\n\ |
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728 is equivalent to @code{fseek (@var{fid}, 0, SEEK_SET)}.\n\ |
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729 @seealso{fseek, ftell, fopen}\n\ |
3372 | 730 @end deftypefn") |
529 | 731 { |
4715 | 732 octave_value retval; |
733 | |
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734 if (args.length () != 1) |
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735 print_usage (); |
506 | 736 |
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737 int result = -1; |
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738 |
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739 octave_stream os = octave_stream_list::lookup (args(0), "frewind"); |
636 | 740 |
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741 result = os.rewind (); |
1 | 742 |
4715 | 743 if (nargout > 0) |
744 retval = result; | |
745 | |
1 | 746 return retval; |
747 } | |
748 | |
1957 | 749 DEFUN (fseek, args, , |
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750 "-*- texinfo -*-\n\ |
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751 @deftypefn {Built-in Function} {} fseek (@var{fid}, @var{offset})\n\ |
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752 @deftypefnx {Built-in Function} {} fseek (@var{fid}, @var{offset}, @var{origin})\n\ |
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753 @deftypefnx {Built-in Function} {@var{status} =} fseek (@dots{})\n\ |
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754 Set the file pointer to the location @var{offset} within the file @var{fid}.\n\ |
5095 | 755 \n\ |
756 The pointer is positioned @var{offset} characters from the @var{origin},\n\ | |
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757 which may be one of the predefined variables @w{@code{SEEK_CUR}} (current\n\ |
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758 position), @w{@code{SEEK_SET}} (beginning), or @w{@code{SEEK_END}} (end of\n\ |
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759 file) or strings @qcode{\"cof\"}, @qcode{\"bof\"} or @qcode{\"eof\"}. If\n\ |
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760 @var{origin} is omitted, @w{@code{SEEK_SET}} is assumed. @var{offset} may\n\ |
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761 be positive, negative, or zero but not all combinations of @var{origin} and\n\ |
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762 @var{offset} can be realized.\n\ |
5095 | 763 \n\ |
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764 @code{fseek} returns 0 on success and -1 on error.\n\ |
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765 @seealso{fskipl, frewind, ftell, fopen}\n\ |
5642 | 766 @end deftypefn") |
529 | 767 { |
4233 | 768 octave_value retval = -1; |
529 | 769 |
770 int nargin = args.length (); | |
771 | |
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772 if (nargin < 2 || nargin > 3) |
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773 print_usage (); |
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774 |
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775 octave_stream os = octave_stream_list::lookup (args(0), "fseek"); |
1181 | 776 |
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777 octave_value origin_arg = (nargin == 3) |
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778 ? args(2) : octave_value (-1.0); |
1 | 779 |
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780 retval = os.seek (args(1), origin_arg); |
1 | 781 |
782 return retval; | |
783 } | |
784 | |
1957 | 785 DEFUN (ftell, args, , |
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786 "-*- texinfo -*-\n\ |
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787 @deftypefn {Built-in Function} {@var{pos} =} ftell (@var{fid})\n\ |
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788 Return the position of the file pointer as the number of characters from the\n\ |
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789 beginning of the file specified by file descriptor @var{fid}.\n\ |
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790 @seealso{fseek, frewind, feof, fopen}\n\ |
5642 | 791 @end deftypefn") |
1181 | 792 { |
4797 | 793 octave_value retval = -1; |
1 | 794 |
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795 if (args.length () != 1) |
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796 print_usage (); |
506 | 797 |
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798 octave_stream os = octave_stream_list::lookup (args(0), "ftell"); |
1 | 799 |
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800 retval = os.tell (); |
1 | 801 |
802 return retval; | |
803 } | |
804 | |
3737 | 805 DEFUN (fprintf, args, nargout, |
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806 "-*- texinfo -*-\n\ |
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807 @deftypefn {Built-in Function} {} fprintf (@var{fid}, @var{template}, @dots{})\n\ |
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808 @deftypefnx {Built-in Function} {} fprintf (@var{template}, @dots{})\n\ |
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809 @deftypefnx {Built-in Function} {@var{numbytes} =} fprintf (@dots{})\n\ |
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810 This function is equivalent to @code{printf}, except that the output is\n\ |
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811 written to the file descriptor @var{fid} instead of @code{stdout}.\n\ |
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812 \n\ |
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813 If @var{fid} is omitted, the output is written to @code{stdout} making the\n\ |
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814 function exactly equivalent to @code{printf}.\n\ |
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815 \n\ |
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816 The optional output returns the number of bytes written to the file.\n\ |
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817 \n\ |
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818 Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\ |
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819 the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\ |
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820 expanded even when the template string is defined with single quotes.\n\ |
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821 @seealso{fputs, fdisp, fwrite, fscanf, printf, sprintf, fopen}\n\ |
5642 | 822 @end deftypefn") |
1181 | 823 { |
4468 | 824 static std::string who = "fprintf"; |
825 | |
4715 | 826 octave_value retval; |
827 | |
828 int result = -1; | |
4468 | 829 |
1181 | 830 int nargin = args.length (); |
831 | |
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832 if (! (nargin > 1 || (nargin > 0 && args(0).is_string ()))) |
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833 print_usage (); |
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834 |
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835 octave_stream os; |
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836 int fmt_n = 0; |
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837 |
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838 if (args(0).is_string ()) |
2095 | 839 { |
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840 os = octave_stream_list::lookup (1, who); |
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841 } |
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842 else |
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843 { |
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844 fmt_n = 1; |
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845 os = octave_stream_list::lookup (args(0), who); |
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846 } |
2873 | 847 |
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848 if (args(fmt_n).is_string ()) |
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849 { |
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850 octave_value_list tmp_args; |
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851 |
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852 if (nargin > 1 + fmt_n) |
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853 { |
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854 tmp_args.resize (nargin-fmt_n-1, octave_value ()); |
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855 |
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856 for (int i = fmt_n + 1; i < nargin; i++) |
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857 tmp_args(i-fmt_n-1) = args(i); |
10315
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858 } |
2095 | 859 |
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860 result = os.printf (args(fmt_n), tmp_args, who); |
2095 | 861 } |
862 else | |
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863 error ("%s: format TEMPLATE must be a string", who.c_str ()); |
1181 | 864 |
4715 | 865 if (nargout > 0) |
866 retval = result; | |
867 | |
868 return retval; | |
1181 | 869 } |
870 | |
4715 | 871 DEFUN (printf, args, nargout, |
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872 "-*- texinfo -*-\n\ |
5095 | 873 @deftypefn {Built-in Function} {} printf (@var{template}, @dots{})\n\ |
4468 | 874 Print optional arguments under the control of the template string\n\ |
5653 | 875 @var{template} to the stream @code{stdout} and return the number of\n\ |
876 characters printed.\n\ | |
877 @ifclear OCTAVE_MANUAL\n\ | |
5095 | 878 \n\ |
5653 | 879 See the Formatted Output section of the GNU Octave manual for a\n\ |
880 complete description of the syntax of the template string.\n\ | |
881 @end ifclear\n\ | |
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882 \n\ |
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|
883 Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\ |
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884 the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\ |
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885 expanded even when the template string is defined with single quotes.\n\ |
5642 | 886 @seealso{fprintf, sprintf, scanf}\n\ |
887 @end deftypefn") | |
4468 | 888 { |
889 static std::string who = "printf"; | |
890 | |
4715 | 891 octave_value retval; |
892 | |
893 int result = -1; | |
4468 | 894 |
895 int nargin = args.length (); | |
896 | |
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897 if (nargin == 0) |
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898 print_usage (); |
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899 |
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900 if (args(0).is_string ()) |
4468 | 901 { |
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902 octave_value_list tmp_args; |
4468 | 903 |
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904 if (nargin > 1) |
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905 { |
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|
906 tmp_args.resize (nargin-1, octave_value ()); |
4468 | 907 |
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908 for (int i = 1; i < nargin; i++) |
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909 tmp_args(i-1) = args(i); |
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910 } |
4468 | 911 |
20805
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912 result = stdout_stream.printf (args(0), tmp_args, who); |
4468 | 913 } |
914 else | |
20805
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915 error ("%s: format TEMPLATE must be a string", who.c_str ()); |
4468 | 916 |
4715 | 917 if (nargout > 0) |
918 retval = result; | |
919 | |
4468 | 920 return retval; |
921 } | |
922 | |
2095 | 923 DEFUN (fputs, args, , |
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924 "-*- texinfo -*-\n\ |
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925 @deftypefn {Built-in Function} {} fputs (@var{fid}, @var{string})\n\ |
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926 @deftypefnx {Built-in Function} {@var{status} =} fputs (@var{fid}, @var{string})\n\ |
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927 Write the string @var{string} to the file with file descriptor @var{fid}.\n\ |
5095 | 928 \n\ |
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929 The string is written to the file with no additional formatting. Use\n\ |
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930 @code{fdisp} instead to automatically append a newline character appropriate\n\ |
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931 for the local machine.\n\ |
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932 \n\ |
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933 Return a non-negative number on success or EOF on error.\n\ |
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934 @seealso{fdisp, fprintf, fwrite, fopen}\n\ |
3372 | 935 @end deftypefn") |
1181 | 936 { |
4468 | 937 static std::string who = "fputs"; |
938 | |
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939 if (args.length () != 2) |
5823 | 940 print_usage (); |
4468 | 941 |
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942 octave_stream os = octave_stream_list::lookup (args(0), who); |
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943 |
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944 return octave_value (os.puts (args(1), who)); |
4468 | 945 } |
946 | |
947 DEFUN (puts, args, , | |
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948 "-*- texinfo -*-\n\ |
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949 @deftypefn {Built-in Function} {} puts (@var{string})\n\ |
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950 @deftypefnx {Built-in Function} {@var{status} =} puts (@var{string})\n\ |
4468 | 951 Write a string to the standard output with no formatting.\n\ |
5095 | 952 \n\ |
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953 The string is written verbatim to the standard output. Use @code{disp} to\n\ |
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954 automatically append a newline character appropriate for the local machine.\n\ |
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955 \n\ |
5095 | 956 Return a non-negative number on success and EOF on error.\n\ |
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957 @seealso{fputs, disp}\n\ |
4468 | 958 @end deftypefn") |
959 { | |
960 static std::string who = "puts"; | |
961 | |
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962 if (args.length () != 1) |
5823 | 963 print_usage (); |
1181 | 964 |
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965 return octave_value (stdout_stream.puts (args(0), who)); |
1181 | 966 } |
967 | |
2095 | 968 DEFUN (sprintf, args, , |
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969 "-*- texinfo -*-\n\ |
3372 | 970 @deftypefn {Built-in Function} {} sprintf (@var{template}, @dots{})\n\ |
971 This is like @code{printf}, except that the output is returned as a\n\ | |
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972 string.\n\ |
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973 \n\ |
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974 Unlike the C library function, which requires you to provide a suitably\n\ |
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975 sized string as an argument, Octave's @code{sprintf} function returns the\n\ |
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976 string, automatically sized to hold all of the items converted.\n\ |
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977 \n\ |
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978 Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\ |
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|
979 the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\ |
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|
980 expanded even when the template string is defined with single quotes.\n\ |
5642 | 981 @seealso{printf, fprintf, sscanf}\n\ |
982 @end deftypefn") | |
1 | 983 { |
4468 | 984 static std::string who = "sprintf"; |
985 | |
2095 | 986 octave_value_list retval; |
1 | 987 |
2095 | 988 int nargin = args.length (); |
1 | 989 |
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990 if (nargin == 0) |
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|
991 print_usage (); |
2116 | 992 |
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993 retval(2) = -1.0; |
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994 retval(1) = "unknown error"; |
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995 retval(0) = ""; |
1 | 996 |
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997 octave_ostrstream *ostr = new octave_ostrstream (); |
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998 |
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999 octave_stream os (ostr); |
628 | 1000 |
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1001 if (os.is_valid ()) |
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1002 { |
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1003 octave_value fmt_arg = args(0); |
1 | 1004 |
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1005 if (fmt_arg.is_string ()) |
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1006 { |
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1007 octave_value_list tmp_args; |
1 | 1008 |
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1009 if (nargin > 1) |
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1010 { |
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1011 tmp_args.resize (nargin-1, octave_value ()); |
628 | 1012 |
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1013 for (int i = 1; i < nargin; i++) |
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1014 tmp_args(i-1) = args(i); |
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1015 } |
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1016 |
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1017 retval(2) = os.printf (fmt_arg, tmp_args, who); |
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1018 retval(1) = os.error (); |
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1019 |
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1020 std::string result = ostr->str (); |
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1021 char type = fmt_arg.is_sq_string () ? '\'' : '"'; |
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1022 |
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1023 retval(0) = (result.empty () |
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1024 ? octave_value (charMatrix (1, 0), type) |
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1025 : octave_value (result, type)); |
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1026 } |
2095 | 1027 else |
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1028 error ("%s: format TEMPLATE must be a string", who.c_str ()); |
1 | 1029 } |
1030 else | |
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1031 error ("%s: unable to create output buffer", who.c_str ()); |
1 | 1032 |
1033 return retval; | |
1034 } | |
1035 | |
2095 | 1036 DEFUN (fscanf, args, , |
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1037 "-*- texinfo -*-\n\ |
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1038 @deftypefn {Built-in Function} {[@var{val}, @var{count}, @var{errmsg}] =} fscanf (@var{fid}, @var{template}, @var{size})\n\ |
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1039 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}, @var{errmsg}] =} fscanf (@var{fid}, @var{template}, \"C\")\n\ |
3372 | 1040 In the first form, read from @var{fid} according to @var{template},\n\ |
1041 returning the result in the matrix @var{val}.\n\ | |
2122 | 1042 \n\ |
3372 | 1043 The optional argument @var{size} specifies the amount of data to read\n\ |
1044 and may be one of\n\ | |
1045 \n\ | |
1046 @table @code\n\ | |
1047 @item Inf\n\ | |
1048 Read as much as possible, returning a column vector.\n\ | |
1049 \n\ | |
1050 @item @var{nr}\n\ | |
1051 Read up to @var{nr} elements, returning a column vector.\n\ | |
2122 | 1052 \n\ |
3372 | 1053 @item [@var{nr}, Inf]\n\ |
1054 Read as much as possible, returning a matrix with @var{nr} rows. If the\n\ | |
1055 number of elements read is not an exact multiple of @var{nr}, the last\n\ | |
1056 column is padded with zeros.\n\ | |
1057 \n\ | |
1058 @item [@var{nr}, @var{nc}]\n\ | |
1059 Read up to @code{@var{nr} * @var{nc}} elements, returning a matrix with\n\ | |
1060 @var{nr} rows. If the number of elements read is not an exact multiple\n\ | |
1061 of @var{nr}, the last column is padded with zeros.\n\ | |
1062 @end table\n\ | |
2122 | 1063 \n\ |
3372 | 1064 @noindent\n\ |
1065 If @var{size} is omitted, a value of @code{Inf} is assumed.\n\ | |
2122 | 1066 \n\ |
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1067 A string is returned if @var{template} specifies only character conversions.\n\ |
2215 | 1068 \n\ |
3372 | 1069 The number of items successfully read is returned in @var{count}.\n\ |
2215 | 1070 \n\ |
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1071 If an error occurs, @var{errmsg} contains a system-dependent error message.\n\ |
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1072 \n\ |
3372 | 1073 In the second form, read from @var{fid} according to @var{template},\n\ |
1074 with each conversion specifier in @var{template} corresponding to a\n\ | |
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1075 single scalar return value. This form is more ``C-like'', and also\n\ |
3491 | 1076 compatible with previous versions of Octave. The number of successful\n\ |
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1077 conversions is returned in @var{count}\n\ |
5653 | 1078 @ifclear OCTAVE_MANUAL\n\ |
1079 \n\ | |
1080 See the Formatted Input section of the GNU Octave manual for a\n\ | |
1081 complete description of the syntax of the template string.\n\ | |
1082 @end ifclear\n\ | |
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1083 @seealso{fgets, fgetl, fread, scanf, sscanf, fopen}\n\ |
5642 | 1084 @end deftypefn") |
1181 | 1085 { |
4468 | 1086 static std::string who = "fscanf"; |
1087 | |
2095 | 1088 octave_value_list retval; |
1181 | 1089 |
1090 int nargin = args.length (); | |
1091 | |
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1092 if (nargin < 2 || nargin > 3) |
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1093 print_usage (); |
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1094 |
2215 | 1095 if (nargin == 3 && args(2).is_string ()) |
2095 | 1096 { |
4468 | 1097 octave_stream os = octave_stream_list::lookup (args(0), who); |
1181 | 1098 |
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1099 if (args(1).is_string ()) |
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1100 retval = os.oscanf (args(1), who); |
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1101 else |
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1102 error ("%s: format TEMPLATE must be a string", who.c_str ()); |
2095 | 1103 } |
1181 | 1104 else |
2215 | 1105 { |
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1106 retval(2) = "unknown error"; |
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1107 retval(1) = 0.0; |
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1108 retval(0) = Matrix (); |
2215 | 1109 |
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1110 octave_stream os = octave_stream_list::lookup (args(0), who); |
2215 | 1111 |
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1112 if (args(1).is_string ()) |
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1113 { |
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1114 octave_idx_type count = 0; |
2215 | 1115 |
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1116 Array<double> size = (nargin == 3) |
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1117 ? args(2).vector_value () |
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1118 : Array<double> (dim_vector (1, 1), |
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1119 lo_ieee_inf_value ()); |
2215 | 1120 |
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1121 octave_value tmp = os.scanf (args(1), size, count, who); |
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1122 |
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1123 retval(2) = os.error (); |
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1124 retval(1) = count; |
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1125 retval(0) = tmp; |
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1126 } |
2215 | 1127 else |
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1128 error ("%s: format must be a string", who.c_str ()); |
2215 | 1129 } |
1181 | 1130 |
1131 return retval; | |
1132 } | |
1133 | |
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1134 static std::string |
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1135 get_sscanf_data (const octave_value& val) |
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1136 { |
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1137 std::string retval; |
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1138 |
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1139 if (val.is_string ()) |
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1140 { |
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1141 octave_value tmp = val.reshape (dim_vector (1, val.numel ())); |
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1142 |
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1143 retval = tmp.string_value (); |
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1144 } |
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1145 else |
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1146 error ("sscanf: argument STRING must be a string"); |
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1147 |
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1148 return retval; |
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1149 } |
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1150 |
2095 | 1151 DEFUN (sscanf, args, , |
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1152 "-*- texinfo -*-\n\ |
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1153 @deftypefn {Built-in Function} {[@var{val}, @var{count}, @var{errmsg}, @var{pos}] =} sscanf (@var{string}, @var{template}, @var{size})\n\ |
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1154 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}, @var{errmsg}] =} sscanf (@var{string}, @var{template}, \"C\")\n\ |
3372 | 1155 This is like @code{fscanf}, except that the characters are taken from the\n\ |
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1156 string @var{string} instead of from a stream.\n\ |
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1157 \n\ |
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1158 Reaching the end of the string is treated as an end-of-file condition. In\n\ |
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1159 addition to the values returned by @code{fscanf}, the index of the next\n\ |
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1160 character to be read is returned in @var{pos}.\n\ |
5642 | 1161 @seealso{fscanf, scanf, sprintf}\n\ |
1162 @end deftypefn") | |
444 | 1163 { |
4468 | 1164 static std::string who = "sscanf"; |
1165 | |
2095 | 1166 octave_value_list retval; |
444 | 1167 |
506 | 1168 int nargin = args.length (); |
1169 | |
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1170 if (nargin < 2 || nargin > 3) |
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1171 print_usage (); |
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1172 |
2215 | 1173 if (nargin == 3 && args(2).is_string ()) |
2095 | 1174 { |
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1175 std::string data = get_sscanf_data (args(0)); |
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1176 |
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1177 octave_stream os = octave_istrstream::create (data); |
1358 | 1178 |
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1179 if (os.is_valid ()) |
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1180 { |
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1181 if (args(1).is_string ()) |
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1182 retval = os.oscanf (args(1), who); |
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1183 else |
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1184 error ("%s: format TEMPLATE must be a string", who.c_str ()); |
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1185 } |
636 | 1186 else |
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1187 error ("%s: unable to create temporary input buffer", who.c_str ()); |
444 | 1188 } |
1189 else | |
2215 | 1190 { |
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1191 retval(3) = -1.0; |
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1192 retval(2) = "unknown error"; |
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1193 retval(1) = 0.0; |
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1194 retval(0) = Matrix (); |
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1195 |
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1196 std::string data = get_sscanf_data (args(0)); |
2215 | 1197 |
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1198 octave_stream os = octave_istrstream::create (data); |
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1199 |
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1200 if (os.is_valid ()) |
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1201 { |
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1202 if (args(1).is_string ()) |
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1203 { |
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1204 octave_idx_type count = 0; |
2215 | 1205 |
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1206 Array<double> size = (nargin == 3) |
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1207 ? args(2).vector_value () |
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1208 : Array<double> (dim_vector (1, 1), |
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1209 lo_ieee_inf_value ()); |
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1210 |
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1211 octave_value tmp = os.scanf (args(1), size, count, who); |
2215 | 1212 |
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1213 // FIXME: is this the right thing to do? |
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1214 // Extract error message first, because getting |
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1215 // position will clear it. |
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1216 std::string errmsg = os.error (); |
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1217 |
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1218 retval(3) = (os.eof () ? data.length () : os.tell ()) + 1; |
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1219 retval(2) = errmsg; |
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1220 retval(1) = count; |
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1221 retval(0) = tmp; |
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1222 } |
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1223 else |
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1224 error ("%s: format TEMPLATE must be a string", |
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1225 who.c_str ()); |
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1226 } |
2215 | 1227 else |
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1228 error ("%s: unable to create temporary input buffer", |
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1229 who.c_str ()); |
2215 | 1230 } |
444 | 1231 |
1232 return retval; | |
1233 } | |
1234 | |
2215 | 1235 DEFUN (scanf, args, nargout, |
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1236 "-*- texinfo -*-\n\ |
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1237 @deftypefn {Built-in Function} {[@var{val}, @var{count}, @var{errmsg}] =} scanf (@var{template}, @var{size})\n\ |
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1238 @deftypefnx {Built-in Function} {[@var{v1}, @var{v2}, @dots{}, @var{count}, @var{errmsg}]] =} scanf (@var{template}, \"C\")\n\ |
3372 | 1239 This is equivalent to calling @code{fscanf} with @var{fid} = @code{stdin}.\n\ |
1240 \n\ | |
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1241 It is currently not useful to call @code{scanf} in interactive programs.\n\ |
5642 | 1242 @seealso{fscanf, sscanf, printf}\n\ |
1243 @end deftypefn") | |
2215 | 1244 { |
1245 int nargin = args.length (); | |
1246 | |
1247 octave_value_list tmp_args (nargin+1, octave_value ()); | |
1248 | |
1249 tmp_args (0) = 0.0; | |
1250 for (int i = 0; i < nargin; i++) | |
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1251 tmp_args(i+1) = args(i); |
2215 | 1252 |
1253 return Ffscanf (tmp_args, nargout); | |
1254 } | |
1255 | |
2116 | 1256 static octave_value |
1257 do_fread (octave_stream& os, const octave_value& size_arg, | |
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1258 const octave_value& prec_arg, const octave_value& skip_arg, |
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1259 const octave_value& arch_arg, octave_idx_type& count) |
2116 | 1260 { |
1261 count = -1; | |
1262 | |
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1263 Array<double> size = size_arg.xvector_value ("fread: invalid SIZE specified"); |
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1264 |
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1265 std::string prec = prec_arg.xstring_value ("fread: PRECISION must be a string"); |
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1266 |
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1267 int block_size = 1; |
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1268 oct_data_conv::data_type input_type; |
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1269 oct_data_conv::data_type output_type; |
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1270 |
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1271 try |
2116 | 1272 { |
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1273 oct_data_conv::string_to_data_type (prec, block_size, |
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1274 input_type, output_type); |
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1275 } |
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1276 catch (octave_execution_exception& e) |
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1277 { |
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1278 error (e, "fread: invalid PRECISION specified"); |
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1279 } |
4944 | 1280 |
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1281 int skip = 0; |
3202 | 1282 |
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1283 try |
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1284 { |
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1285 skip = skip_arg.int_value (true); |
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1286 } |
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1287 catch (octave_execution_exception& e) |
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1288 { |
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1289 error (e, "fread: SKIP must be an integer"); |
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1290 } |
2116 | 1291 |
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1292 std::string arch = arch_arg.xstring_value ("fread: ARCH architecture type must be a string"); |
2116 | 1293 |
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1294 oct_mach_info::float_format flt_fmt |
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1295 = oct_mach_info::string_to_float_format (arch); |
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1296 |
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1297 return os.read (size, block_size, input_type, output_type, skip, |
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1298 flt_fmt, count); |
2116 | 1299 } |
1300 | |
1301 DEFUN (fread, args, , | |
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1302 "-*- texinfo -*-\n\ |
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1303 @deftypefn {Built-in Function} {@var{val} =} fread (@var{fid})\n\ |
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1304 @deftypefnx {Built-in Function} {@var{val} =} fread (@var{fid}, @var{size})\n\ |
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1305 @deftypefnx {Built-in Function} {@var{val} =} fread (@var{fid}, @var{size}, @var{precision})\n\ |
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1306 @deftypefnx {Built-in Function} {@var{val} =} fread (@var{fid}, @var{size}, @var{precision}, @var{skip})\n\ |
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1307 @deftypefnx {Built-in Function} {@var{val} =} fread (@var{fid}, @var{size}, @var{precision}, @var{skip}, @var{arch})\n\ |
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1308 @deftypefnx {Built-in Function} {[@var{val}, @var{count}] =} fread (@dots{})\n\ |
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1309 Read binary data from the file specified by the file descriptor @var{fid}.\n\ |
3372 | 1310 \n\ |
1311 The optional argument @var{size} specifies the amount of data to read\n\ | |
1312 and may be one of\n\ | |
1313 \n\ | |
1314 @table @code\n\ | |
1315 @item Inf\n\ | |
1316 Read as much as possible, returning a column vector.\n\ | |
529 | 1317 \n\ |
3372 | 1318 @item @var{nr}\n\ |
1319 Read up to @var{nr} elements, returning a column vector.\n\ | |
1320 \n\ | |
1321 @item [@var{nr}, Inf]\n\ | |
1322 Read as much as possible, returning a matrix with @var{nr} rows. If the\n\ | |
1323 number of elements read is not an exact multiple of @var{nr}, the last\n\ | |
1324 column is padded with zeros.\n\ | |
1325 \n\ | |
1326 @item [@var{nr}, @var{nc}]\n\ | |
1327 Read up to @code{@var{nr} * @var{nc}} elements, returning a matrix with\n\ | |
1328 @var{nr} rows. If the number of elements read is not an exact multiple\n\ | |
1329 of @var{nr}, the last column is padded with zeros.\n\ | |
1330 @end table\n\ | |
1331 \n\ | |
1332 @noindent\n\ | |
1333 If @var{size} is omitted, a value of @code{Inf} is assumed.\n\ | |
2318 | 1334 \n\ |
3372 | 1335 The optional argument @var{precision} is a string specifying the type of\n\ |
1336 data to read and may be one of\n\ | |
1337 \n\ | |
11595
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1338 @table @asis\n\ |
17281
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1339 @item @qcode{\"schar\"}\n\ |
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1340 @itemx @qcode{\"signed char\"}\n\ |
3372 | 1341 Signed character.\n\ |
529 | 1342 \n\ |
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1343 @item @qcode{\"uchar\"}\n\ |
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1344 @itemx @qcode{\"unsigned char\"}\n\ |
3372 | 1345 Unsigned character.\n\ |
1346 \n\ | |
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1347 @item @qcode{\"int8\"}\n\ |
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1348 @itemx @qcode{\"integer*1\"}\n\ |
4944 | 1349 \n\ |
1350 8-bit signed integer.\n\ | |
2318 | 1351 \n\ |
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1352 @item @qcode{\"int16\"}\n\ |
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1353 @itemx @qcode{\"integer*2\"}\n\ |
4944 | 1354 16-bit signed integer.\n\ |
3372 | 1355 \n\ |
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1356 @item @qcode{\"int32\"}\n\ |
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1357 @itemx @qcode{\"integer*4\"}\n\ |
4944 | 1358 32-bit signed integer.\n\ |
3372 | 1359 \n\ |
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1360 @item @qcode{\"int64\"}\n\ |
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1361 @itemx @qcode{\"integer*8\"}\n\ |
4944 | 1362 64-bit signed integer.\n\ |
1363 \n\ | |
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1364 @item @qcode{\"uint8\"}\n\ |
4944 | 1365 8-bit unsigned integer.\n\ |
529 | 1366 \n\ |
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1367 @item @qcode{\"uint16\"}\n\ |
4944 | 1368 16-bit unsigned integer.\n\ |
3372 | 1369 \n\ |
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1370 @item @qcode{\"uint32\"}\n\ |
4944 | 1371 32-bit unsigned integer.\n\ |
3372 | 1372 \n\ |
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1373 @item @qcode{\"uint64\"}\n\ |
4944 | 1374 64-bit unsigned integer.\n\ |
1375 \n\ | |
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1376 @item @qcode{\"single\"}\n\ |
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1377 @itemx @qcode{\"float32\"}\n\ |
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1378 @itemx @qcode{\"real*4\"}\n\ |
4944 | 1379 32-bit floating point number.\n\ |
3372 | 1380 \n\ |
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1381 @item @qcode{\"double\"}\n\ |
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1382 @itemx @qcode{\"float64\"}\n\ |
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1383 @itemx @qcode{\"real*8\"}\n\ |
4944 | 1384 64-bit floating point number.\n\ |
1385 \n\ | |
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1386 @item @qcode{\"char\"}\n\ |
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1387 @itemx @qcode{\"char*1\"}\n\ |
4944 | 1388 Single character.\n\ |
3372 | 1389 \n\ |
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1390 @item @qcode{\"short\"}\n\ |
4944 | 1391 Short integer (size is platform dependent).\n\ |
1392 \n\ | |
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1393 @item @qcode{\"int\"}\n\ |
4944 | 1394 Integer (size is platform dependent).\n\ |
1395 \n\ | |
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1396 @item @qcode{\"long\"}\n\ |
4944 | 1397 Long integer (size is platform dependent).\n\ |
3372 | 1398 \n\ |
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|
1399 @item @qcode{\"ushort\"}\n\ |
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|
1400 @itemx @qcode{\"unsigned short\"}\n\ |
4944 | 1401 Unsigned short integer (size is platform dependent).\n\ |
4610 | 1402 \n\ |
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1403 @item @qcode{\"uint\"}\n\ |
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|
1404 @itemx @qcode{\"unsigned int\"}\n\ |
4944 | 1405 Unsigned integer (size is platform dependent).\n\ |
4610 | 1406 \n\ |
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1407 @item @qcode{\"ulong\"}\n\ |
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|
1408 @itemx @qcode{\"unsigned long\"}\n\ |
4944 | 1409 Unsigned long integer (size is platform dependent).\n\ |
1410 \n\ | |
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|
1411 @item @qcode{\"float\"}\n\ |
4944 | 1412 Single precision floating point number (size is platform dependent).\n\ |
3372 | 1413 @end table\n\ |
1414 \n\ | |
1415 @noindent\n\ | |
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|
1416 The default precision is @qcode{\"uchar\"}.\n\ |
2318 | 1417 \n\ |
4944 | 1418 The @var{precision} argument may also specify an optional repeat\n\ |
1419 count. For example, @samp{32*single} causes @code{fread} to read\n\ | |
1420 a block of 32 single precision floating point numbers. Reading in\n\ | |
1421 blocks is useful in combination with the @var{skip} argument.\n\ | |
1422 \n\ | |
1423 The @var{precision} argument may also specify a type conversion.\n\ | |
1424 For example, @samp{int16=>int32} causes @code{fread} to read 16-bit\n\ | |
1425 integer values and return an array of 32-bit integer values. By\n\ | |
1426 default, @code{fread} returns a double precision array. The special\n\ | |
1427 form @samp{*TYPE} is shorthand for @samp{TYPE=>TYPE}.\n\ | |
1428 \n\ | |
7096 | 1429 The conversion and repeat counts may be combined. For example, the\n\ |
1430 specification @samp{32*single=>single} causes @code{fread} to read\n\ | |
1431 blocks of single precision floating point values and return an array\n\ | |
1432 of single precision values instead of the default array of double\n\ | |
1433 precision values.\n\ | |
4944 | 1434 \n\ |
3372 | 1435 The optional argument @var{skip} specifies the number of bytes to skip\n\ |
4944 | 1436 after each element (or block of elements) is read. If it is not\n\ |
1437 specified, a value of 0 is assumed. If the final block read is not\n\ | |
1438 complete, the final skip is omitted. For example,\n\ | |
1439 \n\ | |
1440 @example\n\ | |
1441 fread (f, 10, \"3*single=>single\", 8)\n\ | |
1442 @end example\n\ | |
1443 \n\ | |
1444 @noindent\n\ | |
1445 will omit the final 8-byte skip because the last read will not be\n\ | |
1446 a complete block of 3 values.\n\ | |
3372 | 1447 \n\ |
1448 The optional argument @var{arch} is a string specifying the data format\n\ | |
1449 for the file. Valid values are\n\ | |
529 | 1450 \n\ |
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1451 @table @asis\n\ |
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Rik <rik@octave.org>
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1452 @item @qcode{\"native\"} or @qcode{\"n\"}\n\ |
3372 | 1453 The format of the current machine.\n\ |
1454 \n\ | |
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1455 @item @qcode{\"ieee-be\"} or @qcode{\"b\"}\n\ |
3372 | 1456 IEEE big endian.\n\ |
1457 \n\ | |
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1458 @item @qcode{\"ieee-le\"} or @qcode{\"l\"}\n\ |
3372 | 1459 IEEE little endian.\n\ |
1460 @end table\n\ | |
2318 | 1461 \n\ |
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|
1462 If no @var{arch} is given the value used in the call to @code{fopen} which\n\ |
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1463 created the file descriptor is used. Otherwise, the value specified with\n\ |
97edbce9b975
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1464 @code{fread} overrides that of @code{fopen} and determines the data format.\n\ |
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|
1465 \n\ |
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|
1466 The output argument @var{val} contains the data read from the file.\n\ |
20439
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|
1467 \n\ |
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|
1468 The optional return value @var{count} contains the number of elements read.\n\ |
14438
6a8c3cd326fd
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|
1469 @seealso{fwrite, fgets, fgetl, fscanf, fopen}\n\ |
5642 | 1470 @end deftypefn") |
529 | 1471 { |
2095 | 1472 octave_value_list retval; |
2116 | 1473 |
1474 int nargin = args.length (); | |
1475 | |
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1476 if (nargin < 1 || nargin > 5) |
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|
1477 print_usage (); |
2116 | 1478 |
20805
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1479 retval(1) = -1.0; |
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1480 retval(0) = Matrix (); |
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1481 |
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|
1482 octave_stream os = octave_stream_list::lookup (args(0), "fread"); |
2116 | 1483 |
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1484 octave_value size = lo_ieee_inf_value (); |
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1485 octave_value prec = "uchar"; |
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1486 octave_value skip = 0; |
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1487 octave_value arch = "unknown"; |
2116 | 1488 |
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1489 int idx = 1; |
2116 | 1490 |
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1491 if (nargin > idx && ! args(idx).is_string ()) |
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1492 size = args(idx++); |
2116 | 1493 |
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|
1494 if (nargin > idx) |
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1495 prec = args(idx++); |
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1496 |
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1497 if (nargin > idx) |
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1498 skip = args(idx++); |
4257 | 1499 |
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1500 if (nargin > idx) |
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1501 arch = args(idx++); |
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1502 else if (skip.is_string ()) |
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1503 { |
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1504 arch = skip; |
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1505 skip = 0; |
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1506 } |
2116 | 1507 |
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1508 octave_idx_type count = -1; |
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1509 |
20805
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1510 octave_value tmp = do_fread (os, size, prec, skip, arch, count); |
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1511 |
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1512 retval(1) = count; |
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1513 retval(0) = tmp; |
2116 | 1514 |
529 | 1515 return retval; |
1516 } | |
1517 | |
2116 | 1518 static int |
1519 do_fwrite (octave_stream& os, const octave_value& data, | |
10315
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1520 const octave_value& prec_arg, const octave_value& skip_arg, |
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1521 const octave_value& arch_arg) |
2116 | 1522 { |
20700
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|
1523 std::string prec = prec_arg.xstring_value ("fwrite: PRECISION must be a string"); |
20581
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1524 |
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1525 int block_size = 1; |
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1526 oct_data_conv::data_type output_type; |
2116 | 1527 |
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1528 try |
20581
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1529 { |
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1530 oct_data_conv::string_to_data_type (prec, block_size, output_type); |
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1531 } |
20785
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|
1532 catch (octave_execution_exception& e) |
20741
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1533 { |
20756
200ae1d650b7
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|
1534 error (e, "fwrite: invalid PRECISION specified"); |
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1535 } |
2116 | 1536 |
20747
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1537 int skip = 0; |
3202 | 1538 |
20741
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|
1539 try |
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|
1540 { |
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|
1541 skip = skip_arg.int_value (true); |
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|
1542 } |
20785
b6f2909e7f94
always throw exception after debugging with debug_on_error
John W. Eaton <jwe@octave.org>
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|
1543 catch (octave_execution_exception& e) |
20741
a5ab31b52ae8
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|
1544 { |
20756
200ae1d650b7
propagate octave_execution_exception objects through try/catch blocks
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|
1545 error (e, "fwrite: SKIP must be an integer"); |
20741
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1546 } |
2116 | 1547 |
20741
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1548 std::string arch = arch_arg.xstring_value ("fwrite: ARCH architecture type must be a string"); |
2116 | 1549 |
20741
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1550 oct_mach_info::float_format flt_fmt |
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1551 = oct_mach_info::string_to_float_format (arch); |
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1552 |
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1553 return os.write (data, block_size, output_type, skip, flt_fmt); |
2116 | 1554 } |
1555 | |
1556 DEFUN (fwrite, args, , | |
17787
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Rik <rik@octave.org>
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1557 "-*- texinfo -*-\n\ |
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1558 @deftypefn {Built-in Function} {} fwrite (@var{fid}, @var{data})\n\ |
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1559 @deftypefnx {Built-in Function} {} fwrite (@var{fid}, @var{data}, @var{precision})\n\ |
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1560 @deftypefnx {Built-in Function} {} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip})\n\ |
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1561 @deftypefnx {Built-in Function} {} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip}, @var{arch})\n\ |
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1562 @deftypefnx {Built-in Function} {@var{count} =} fwrite (@dots{})\n\ |
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1563 Write data in binary form to the file specified by the file descriptor\n\ |
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1564 @var{fid}, returning the number of values @var{count} successfully written\n\ |
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1565 to the file.\n\ |
1181 | 1566 \n\ |
3372 | 1567 The argument @var{data} is a matrix of values that are to be written to\n\ |
1568 the file. The values are extracted in column-major order.\n\ | |
1181 | 1569 \n\ |
3372 | 1570 The remaining arguments @var{precision}, @var{skip}, and @var{arch} are\n\ |
1571 optional, and are interpreted as described for @code{fread}.\n\ | |
1181 | 1572 \n\ |
3372 | 1573 The behavior of @code{fwrite} is undefined if the values in @var{data}\n\ |
1574 are too large to fit in the specified precision.\n\ | |
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1575 @seealso{fread, fputs, fprintf, fopen}\n\ |
5642 | 1576 @end deftypefn") |
1181 | 1577 { |
2116 | 1578 int nargin = args.length (); |
1579 | |
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1580 if (nargin < 2 || nargin > 5) |
5823 | 1581 print_usage (); |
2116 | 1582 |
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1583 octave_stream os = octave_stream_list::lookup (args(0), "fwrite"); |
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1584 |
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1585 octave_value prec = "uchar"; |
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1586 octave_value skip = 0; |
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1587 octave_value arch = "unknown"; |
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1588 |
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1589 int idx = 1; |
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1590 |
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1591 octave_value data = args(idx++); |
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1592 |
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1593 if (nargin > idx) |
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1594 prec = args(idx++); |
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1595 |
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1596 if (nargin > idx) |
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1597 skip = args(idx++); |
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1598 |
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1599 if (nargin > idx) |
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1600 arch = args(idx++); |
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1601 else if (skip.is_string ()) |
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1602 { |
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1603 arch = skip; |
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1604 skip = 0; |
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1605 } |
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1606 |
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1607 return octave_value (do_fwrite (os, data, prec, skip, arch)); |
1181 | 1608 } |
1609 | |
5906 | 1610 DEFUNX ("feof", Ffeof, args, , |
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1611 "-*- texinfo -*-\n\ |
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1612 @deftypefn {Built-in Function} {@var{status} =} feof (@var{fid})\n\ |
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1613 Return 1 if an end-of-file condition has been encountered for the file\n\ |
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1614 specified by file descriptor @var{fid} and 0 otherwise.\n\ |
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1615 \n\ |
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1616 Note that @code{feof} will only return 1 if the end of the file has already\n\ |
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1617 been encountered, not if the next read operation will result in an\n\ |
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1618 end-of-file condition.\n\ |
19109
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1619 @seealso{fread, frewind, fseek, fclear, fopen}\n\ |
5642 | 1620 @end deftypefn") |
529 | 1621 { |
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|
1622 if (args.length () != 1) |
5823 | 1623 print_usage (); |
444 | 1624 |
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1625 octave_stream os = octave_stream_list::lookup (args(0), "feof"); |
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1626 |
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1627 return octave_value (os.eof () ? 1.0 : 0.0); |
444 | 1628 } |
1629 | |
5906 | 1630 DEFUNX ("ferror", Fferror, args, , |
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1631 "-*- texinfo -*-\n\ |
19150 | 1632 @deftypefn {Built-in Function} {@var{msg} =} ferror (@var{fid})\n\ |
1633 @deftypefnx {Built-in Function} {[@var{msg}, @var{err}] =} ferror (@var{fid})\n\ | |
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1634 @deftypefnx {Built-in Function} {[@var{dots}] =} ferror (@var{fid}, \"clear\")\n\ |
19150 | 1635 Query the error status of the stream specified by file descriptor @var{fid}\n\ |
1636 \n\ | |
1637 If an error condition exists then return a string @var{msg} describing the\n\ | |
1638 error. Otherwise, return an empty string @qcode{\"\"}.\n\ | |
9797
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1639 \n\ |
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Rik <rik@octave.org>
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1640 The second input @qcode{\"clear\"} is optional. If supplied, the error\n\ |
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1641 state on the stream will be cleared.\n\ |
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1642 \n\ |
19150 | 1643 The optional second output is a numeric indication of the error status.\n\ |
1644 @var{err} is 1 if an error condition has been encountered and 0 otherwise.\n\ | |
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1645 \n\ |
19150 | 1646 Note that @code{ferror} indicates if an error has already occurred, not\n\ |
1647 whether the next operation will result in an error condition.\n\ | |
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1648 @seealso{fclear, fopen}\n\ |
3372 | 1649 @end deftypefn") |
1230 | 1650 { |
2095 | 1651 octave_value_list retval; |
1230 | 1652 |
2095 | 1653 int nargin = args.length (); |
1230 | 1654 |
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1655 if (nargin < 1 || nargin > 2) |
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1656 print_usage (); |
1230 | 1657 |
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1658 octave_stream os = octave_stream_list::lookup (args(0), "ferror"); |
1230 | 1659 |
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1660 bool clear = false; |
2095 | 1661 |
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1662 if (nargin == 2) |
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1663 { |
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1664 std::string opt = args(1).string_value (); |
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1665 |
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1666 clear = (opt == "clear"); |
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1667 } |
1755 | 1668 |
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1669 int error_number = 0; |
1230 | 1670 |
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1671 std::string error_message = os.error (clear, error_number); |
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1672 |
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1673 retval(1) = error_number; |
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1674 retval(0) = error_message; |
1230 | 1675 |
1676 return retval; | |
1677 } | |
1678 | |
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1679 DEFUNX ("popen", Fpopen, args, , |
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1680 "-*- texinfo -*-\n\ |
4326 | 1681 @deftypefn {Built-in Function} {@var{fid} =} popen (@var{command}, @var{mode})\n\ |
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1682 Start a process and create a pipe.\n\ |
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1683 \n\ |
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1684 The name of the command to run is given by @var{command}. The argument\n\ |
3301 | 1685 @var{mode} may be\n\ |
1686 \n\ | |
1687 @table @code\n\ | |
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1688 @item @qcode{\"r\"}\n\ |
3301 | 1689 The pipe will be connected to the standard output of the process, and\n\ |
1690 open for reading.\n\ | |
1230 | 1691 \n\ |
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1692 @item @qcode{\"w\"}\n\ |
3301 | 1693 The pipe will be connected to the standard input of the process, and\n\ |
1694 open for writing.\n\ | |
1695 @end table\n\ | |
1696 \n\ | |
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1697 The file identifier corresponding to the input or output stream of the\n\ |
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1698 process is returned in @var{fid}.\n\ |
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1699 \n\ |
10840 | 1700 For example:\n\ |
1230 | 1701 \n\ |
3301 | 1702 @example\n\ |
1703 @group\n\ | |
1704 fid = popen (\"ls -ltr / | tail -3\", \"r\");\n\ | |
7768
a2d9f325b65a
Use isschar instead of deprecated isstr
Rafael Laboissiere <rafael@debian.org>
parents:
7730
diff
changeset
|
1705 while (ischar (s = fgets (fid)))\n\ |
3301 | 1706 fputs (stdout, s);\n\ |
1707 endwhile\n\ | |
14360
97883071e8e4
doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents:
14210
diff
changeset
|
1708 \n\ |
97883071e8e4
doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents:
14210
diff
changeset
|
1709 @print{} drwxr-xr-x 33 root root 3072 Feb 15 13:28 etc\n\ |
97883071e8e4
doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents:
14210
diff
changeset
|
1710 @print{} drwxr-xr-x 3 root root 1024 Feb 15 13:28 lib\n\ |
97883071e8e4
doc: Correct off-by-1 spacings in all .cc docstrings
Rik <octave@nomad.inbox5.com>
parents:
14210
diff
changeset
|
1711 @print{} drwxrwxrwt 15 root root 2048 Feb 17 14:53 tmp\n\ |
3301 | 1712 @end group\n\ |
1713 @end example\n\ | |
18950
ed3cb9f81145
file-io.cc (popen): Add seealso popen2
Andreas Weber <andy.weber.aw@gmail.com>
parents:
18487
diff
changeset
|
1714 @seealso{popen2}\n\ |
3301 | 1715 @end deftypefn") |
1230 | 1716 { |
4233 | 1717 octave_value retval = -1; |
1230 | 1718 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1719 if (args.length () != 2) |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1720 print_usage (); |
1230 | 1721 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1722 std::string name = args(0).xstring_value ("popen: COMMAND must be a string"); |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1723 std::string mode = args(1).xstring_value ("popen: MODE must be a string"); |
1230 | 1724 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1725 if (mode == "r") |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1726 { |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1727 octave_stream ips = octave_iprocstream::create (name); |
1230 | 1728 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1729 retval = octave_stream_list::insert (ips); |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1730 } |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1731 else if (mode == "w") |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1732 { |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1733 octave_stream ops = octave_oprocstream::create (name); |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1734 |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1735 retval = octave_stream_list::insert (ops); |
2095 | 1736 } |
1230 | 1737 else |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1738 error ("popen: invalid MODE specified"); |
1230 | 1739 |
1740 return retval; | |
1741 } | |
1742 | |
16308
122c1a7a3004
avoid trouble if pclose is a macro
John W. Eaton <jwe@octave.org>
parents:
16099
diff
changeset
|
1743 DEFUNX ("pclose", Fpclose, args, , |
17787
175b392e91fe
Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
1744 "-*- texinfo -*-\n\ |
3301 | 1745 @deftypefn {Built-in Function} {} pclose (@var{fid})\n\ |
19109
e90bfaadb489
doc: Increase seealso links between low level C IO functions.
Rik <rik@octave.org>
parents:
19030
diff
changeset
|
1746 Close a file identifier that was opened by @code{popen}.\n\ |
e90bfaadb489
doc: Increase seealso links between low level C IO functions.
Rik <rik@octave.org>
parents:
19030
diff
changeset
|
1747 \n\ |
e90bfaadb489
doc: Increase seealso links between low level C IO functions.
Rik <rik@octave.org>
parents:
19030
diff
changeset
|
1748 The function @code{fclose} may also be used for the same purpose.\n\ |
e90bfaadb489
doc: Increase seealso links between low level C IO functions.
Rik <rik@octave.org>
parents:
19030
diff
changeset
|
1749 @seealso{fclose, popen}\n\ |
3301 | 1750 @end deftypefn") |
1230 | 1751 { |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1752 if (args.length () != 1) |
5823 | 1753 print_usage (); |
1379 | 1754 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1755 return octave_value (octave_stream_list::remove (args(0), "pclose")); |
1379 | 1756 } |
1757 | |
19278
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1758 DEFUN (tempname, args, , |
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1759 "-*- texinfo -*-\n\ |
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1760 @deftypefn {Built-in Function} {@var{fname} =} tempname ()\n\ |
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1761 @deftypefnx {Built-in Function} {@var{fname} =} tempname (@var{dir})\n\ |
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1762 @deftypefnx {Built-in Function} {@var{fname} =} tempname (@var{dir}, @var{prefix})\n\ |
20713
2469d78a1d8b
Consistently use 'filename' rather than 'file name' throughout code base.
Rik <rik@octave.org>
parents:
20704
diff
changeset
|
1763 Return a unique temporary filename as a string.\n\ |
3372 | 1764 \n\ |
17281
bc924baa2c4e
doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents:
17170
diff
changeset
|
1765 If @var{prefix} is omitted, a value of @qcode{\"oct-\"} is used.\n\ |
20172
4f45eaf83908
doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents:
20101
diff
changeset
|
1766 \n\ |
4267 | 1767 If @var{dir} is also omitted, the default directory for temporary files\n\ |
19385
3b4d6780d6b8
doc: Add missing closing parenthesis in tempname docstring.
Rik <rik@octave.org>
parents:
19278
diff
changeset
|
1768 (@code{P_tmpdir}) is used. If @var{dir} is provided, it must exist,\n\ |
19210
841d8f606bcd
doc: Improve docstrings for tempname, tempdir family of functions.
Rik <rik@octave.org>
parents:
19150
diff
changeset
|
1769 otherwise the default directory for temporary files is used.\n\ |
841d8f606bcd
doc: Improve docstrings for tempname, tempdir family of functions.
Rik <rik@octave.org>
parents:
19150
diff
changeset
|
1770 \n\ |
19278
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1771 Programming Note: Because the named file is not opened by @code{tempname},\n\ |
19210
841d8f606bcd
doc: Improve docstrings for tempname, tempdir family of functions.
Rik <rik@octave.org>
parents:
19150
diff
changeset
|
1772 it is possible, though relatively unlikely, that it will not be available\n\ |
841d8f606bcd
doc: Improve docstrings for tempname, tempdir family of functions.
Rik <rik@octave.org>
parents:
19150
diff
changeset
|
1773 by the time your program attempts to open it. If this is a concern,\n\ |
19278
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1774 see @code{tmpfile}.\n\ |
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
19268
diff
changeset
|
1775 @seealso{mkstemp, tempdir, P_tmpdir, tmpfile}\n\ |
5642 | 1776 @end deftypefn") |
1802 | 1777 { |
2095 | 1778 octave_value retval; |
1802 | 1779 |
20812
d9ca869ca124
maint: Clean-up more instances of print_usage().
Rik <rik@octave.org>
parents:
20805
diff
changeset
|
1780 int nargin = args.length (); |
2936 | 1781 |
20812
d9ca869ca124
maint: Clean-up more instances of print_usage().
Rik <rik@octave.org>
parents:
20805
diff
changeset
|
1782 if (nargin > 2) |
5823 | 1783 print_usage (); |
1802 | 1784 |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1785 std::string dir; |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1786 |
20812
d9ca869ca124
maint: Clean-up more instances of print_usage().
Rik <rik@octave.org>
parents:
20805
diff
changeset
|
1787 if (nargin > 0) |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1788 dir = args(0).xstring_value ("tempname: DIR must be a string"); |
2d6ddb2b157c
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John W. Eaton <jwe@octave.org>
parents:
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|
1789 |
2d6ddb2b157c
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John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1790 std::string pfx ("oct-"); |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1791 |
20812
d9ca869ca124
maint: Clean-up more instances of print_usage().
Rik <rik@octave.org>
parents:
20805
diff
changeset
|
1792 if (nargin > 1) |
20805
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1793 pfx = args(1).xstring_value ("tempname: PREFIX must be a string"); |
2d6ddb2b157c
eliminate return statements after calls to print_usage
John W. Eaton <jwe@octave.org>
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|
1794 |
2d6ddb2b157c
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John W. Eaton <jwe@octave.org>
parents:
20785
diff
changeset
|
1795 return octave_value (octave_tempnam (dir, pfx)); |
1802 | 1796 } |
1797 | |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1798 /* |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
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diff
changeset
|
1799 %!test |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
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diff
changeset
|
1800 %! if (ispc ()) |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1801 %! envname = "TMP"; |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1802 %! else |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1803 %! envname = "TMPDIR"; |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1804 %! endif |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1805 %! envdir = getenv (envname); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1806 %! unsetenv (envname); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1807 %! unwind_protect |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1808 %! ## Test 0-argument form |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1809 %! fname = tempname (); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1810 %! [tmpdir, tmpfname] = fileparts (fname); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1811 %! assert (tmpdir, P_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1812 %! assert (tmpfname (1:4), "oct-"); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1813 %! ## Test 1-argument form |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1814 %! tmp_tmpdir = [P_tmpdir filesep() substr(tmpfname, -5)]; |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1815 %! mkdir (tmp_tmpdir) || error ("Unable to create tmp dir"); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1816 %! setenv (envname, P_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1817 %! fname = tempname (tmp_tmpdir); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1818 %! [tmpdir, tmpfname] = fileparts (fname); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1819 %! assert (tmpdir, tmp_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1820 %! assert (tmpfname (1:4), "oct-"); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1821 %! ## Test 1-argument form w/null tmpdir |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1822 %! fname = tempname (""); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1823 %! [tmpdir, tmpfname] = fileparts (fname); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1824 %! assert (tmpdir, P_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1825 %! assert (tmpfname (1:4), "oct-"); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1826 %! ## Test 2-argument form |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1827 %! fname = tempname (tmp_tmpdir, "pfx-"); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1828 %! [tmpdir, tmpfname] = fileparts (fname); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1829 %! assert (tmpdir, tmp_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1830 %! assert (tmpfname (1:4), "pfx-"); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
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19403
diff
changeset
|
1831 %! ## Test 2-argument form w/null prefix |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1832 %! fname = tempname (tmp_tmpdir, ""); |
19597
db92e7e28e1f
strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents:
19420
diff
changeset
|
1833 %! [tmpdir, tmpfname] = fileparts (fname); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1834 %! assert (tmpdir, tmp_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1835 %! assert (tmpfname (1:4), "file"); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1836 %! unwind_protect_cleanup |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1837 %! rmdir (tmp_tmpdir); |
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
19403
diff
changeset
|
1838 %! if (isempty (envdir)) |
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1839 %! unsetenv (envname); |
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1840 %! else |
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1841 %! setenv (envname, envdir); |
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1842 %! endif |
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1843 %! end_unwind_protect |
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1844 */ |
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1845 |
4326 | 1846 DEFUN (tmpfile, args, , |
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1847 "-*- texinfo -*-\n\ |
4326 | 1848 @deftypefn {Built-in Function} {[@var{fid}, @var{msg}] =} tmpfile ()\n\ |
1849 Return the file ID corresponding to a new temporary file with a unique\n\ | |
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1850 name.\n\ |
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1851 \n\ |
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1852 The file is opened in binary read/write (@qcode{\"w+b\"}) mode and will be\n\ |
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1853 deleted automatically when it is closed or when Octave exits.\n\ |
4326 | 1854 \n\ |
1855 If successful, @var{fid} is a valid file ID and @var{msg} is an empty\n\ | |
1856 string. Otherwise, @var{fid} is -1 and @var{msg} contains a\n\ | |
1857 system-dependent error message.\n\ | |
19278
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1858 @seealso{tempname, mkstemp, tempdir, P_tmpdir}\n\ |
5642 | 1859 @end deftypefn") |
4326 | 1860 { |
1861 octave_value_list retval; | |
1862 | |
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1863 if (args.length () != 0) |
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1864 print_usage (); |
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1865 |
4326 | 1866 retval(1) = std::string (); |
1867 retval(0) = -1; | |
1868 | |
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1869 FILE *fid = gnulib::tmpfile (); |
4326 | 1870 |
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1871 if (fid) |
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1872 { |
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1873 std::string nm; |
4326 | 1874 |
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1875 std::ios::openmode md = fopen_mode_to_ios_mode ("w+b"); |
4326 | 1876 |
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1877 octave_stream s = octave_stdiostream::create (nm, fid, md); |
4326 | 1878 |
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1879 if (s) |
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1880 retval(0) = octave_stream_list::insert (s); |
4326 | 1881 else |
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1882 error ("tmpfile: failed to create octave_stdiostream object"); |
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1883 |
4326 | 1884 } |
1885 else | |
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1886 { |
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1887 retval(1) = gnulib::strerror (errno); |
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1888 retval(0) = -1; |
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1889 } |
4326 | 1890 |
1891 return retval; | |
1892 } | |
1893 | |
1894 DEFUN (mkstemp, args, , | |
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1895 "-*- texinfo -*-\n\ |
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1896 @deftypefn {Built-in Function} {[@var{fid}, @var{name}, @var{msg}] =} mkstemp (\"@var{template}\")\n\ |
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1897 @deftypefnx {Built-in Function} {[@var{fid}, @var{name}, @var{msg}] =} mkstemp (\"@var{template}\", @var{delete})\n\ |
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1898 Return the file descriptor @var{fid} corresponding to a new temporary file\n\ |
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1899 with a unique name created from @var{template}.\n\ |
4326 | 1900 \n\ |
19210
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1901 The last six characters of @var{template} must be @qcode{\"XXXXXX\"} and\n\ |
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1902 these are replaced with a string that makes the filename unique. The file\n\ |
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1903 is then created with mode read/write and permissions that are system\n\ |
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1904 dependent (on GNU/Linux systems, the permissions will be 0600 for versions of\n\ |
19230
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1905 glibc 2.0.7 and later). The file is opened in binary mode and with the\n\ |
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1906 @w{@code{O_EXCL}} flag.\n\ |
4326 | 1907 \n\ |
19109
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1908 If the optional argument @var{delete} is supplied and is true, the file will\n\ |
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1909 be deleted automatically when Octave exits.\n\ |
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1910 \n\ |
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1911 If successful, @var{fid} is a valid file ID, @var{name} is the name of the\n\ |
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1912 file, and @var{msg} is an empty string. Otherwise, @var{fid} is -1,\n\ |
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1913 @var{name} is empty, and @var{msg} contains a system-dependent error message.\n\ |
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1914 @seealso{tempname, tempdir, P_tmpdir, tmpfile, fopen}\n\ |
5642 | 1915 @end deftypefn") |
4326 | 1916 { |
1917 octave_value_list retval; | |
1918 | |
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1919 int nargin = args.length (); |
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1920 |
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1921 if (nargin < 1 || nargin > 2) |
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1922 print_usage (); |
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1923 |
4326 | 1924 retval(2) = std::string (); |
1925 retval(1) = std::string (); | |
1926 retval(0) = -1; | |
1927 | |
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1928 std::string tmpl8 = args(0).xstring_value ("mkstemp: TEMPLATE argument must be a string"); |
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1929 |
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1930 OCTAVE_LOCAL_BUFFER (char, tmp, tmpl8.size () + 1); |
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1931 strcpy (tmp, tmpl8.c_str ()); |
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1932 |
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1933 int fd = gnulib::mkostemp (tmp, O_BINARY); |
4326 | 1934 |
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1935 if (fd < 0) |
4326 | 1936 { |
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1937 retval(2) = gnulib::strerror (errno); |
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1938 retval(0) = fd; |
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1939 } |
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1940 else |
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1941 { |
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1942 const char *fopen_mode = "w+b"; |
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1943 |
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1944 FILE *fid = fdopen (fd, fopen_mode); |
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1945 |
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1946 if (fid) |
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1947 { |
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1948 std::string nm = tmp; |
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1949 |
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1950 std::ios::openmode md = fopen_mode_to_ios_mode (fopen_mode); |
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1951 |
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1952 octave_stream s = octave_stdiostream::create (nm, fid, md); |
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1953 |
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1954 if (s) |
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1955 { |
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1956 retval(1) = nm; |
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1957 retval(0) = octave_stream_list::insert (s); |
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1958 |
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1959 if (nargin == 2 && args(1).is_true ()) |
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1960 mark_for_deletion (nm); |
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1961 } |
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1962 else |
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1963 error ("mkstemp: failed to create octave_stdiostream object"); |
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1964 } |
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1965 else |
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1966 { |
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1967 retval(2) = gnulib::strerror (errno); |
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1968 retval(0) = -1; |
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1969 } |
4326 | 1970 } |
1971 | |
1972 return retval; | |
1973 } | |
1974 | |
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1975 // FIXME: This routine also exists verbatim in syscalls.cc. |
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1976 // Maybe change to be a general utility routine. |
1400 | 1977 static int |
1978 convert (int x, int ibase, int obase) | |
1979 { | |
1980 int retval = 0; | |
1981 | |
1982 int tmp = x % obase; | |
1983 | |
1984 if (tmp > ibase - 1) | |
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1985 error ("umask: invalid digit"); |
1400 | 1986 else |
1987 { | |
1988 retval = tmp; | |
1989 int mult = ibase; | |
1990 while ((x = (x - tmp) / obase)) | |
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1991 { |
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1992 tmp = x % obase; |
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1993 if (tmp > ibase - 1) |
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1994 { |
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1995 error ("umask: invalid digit"); |
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1996 break; |
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1997 } |
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1998 retval += mult * tmp; |
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1999 mult *= ibase; |
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2000 } |
1400 | 2001 } |
2002 | |
2003 return retval; | |
2004 } | |
2005 | |
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2006 DEFUNX ("umask", Fumask, args, , |
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2007 "-*- texinfo -*-\n\ |
3301 | 2008 @deftypefn {Built-in Function} {} umask (@var{mask})\n\ |
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2009 Set the permission mask for file creation.\n\ |
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2010 \n\ |
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2011 The parameter @var{mask} is an integer, interpreted as an octal number.\n\ |
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2012 \n\ |
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2013 If successful, returns the previous value of the mask (as an integer to be\n\ |
4715 | 2014 interpreted as an octal number); otherwise an error message is printed.\n\ |
20198
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2015 \n\ |
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2016 The permission mask is a UNIX concept used when creating new objects on a\n\ |
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2017 file system such as files, directories, or named FIFOs. The object to be\n\ |
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2018 created has base permissions in an octal number @var{mode} which are\n\ |
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2019 modified according to the octal value of @var{mask}. The final permissions\n\ |
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2020 for the new object are @code{@var{mode} - @var{mask}}.\n\ |
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2021 @seealso{fopen, mkdir, mkfifo}\n\ |
3301 | 2022 @end deftypefn") |
1400 | 2023 { |
2095 | 2024 octave_value_list retval; |
1400 | 2025 |
2026 int status = 0; | |
2027 | |
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2028 if (args.length () != 1) |
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2029 print_usage (); |
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2030 |
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2031 int mask = args(0).xint_value ("umask: MASK must be an integer"); |
1400 | 2032 |
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2033 if (mask < 0) |
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2034 { |
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2035 status = -1; |
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2036 error ("umask: MASK must be a positive integer value"); |
1400 | 2037 } |
2038 else | |
20805
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2039 { |
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2040 int oct_mask = convert (mask, 8, 10); |
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2041 |
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2042 status = convert (octave_umask (oct_mask), 10, 8); |
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2043 } |
1400 | 2044 |
2045 if (status >= 0) | |
4233 | 2046 retval(0) = status; |
1400 | 2047 |
2048 return retval; | |
2049 } | |
2050 | |
5749 | 2051 static octave_value |
6483 | 2052 const_value (const char *, const octave_value_list& args, int val) |
2189 | 2053 { |
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2054 if (args.length () != 0) |
5823 | 2055 print_usage (); |
5749 | 2056 |
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2057 return octave_value (val); |
5749 | 2058 } |
2059 | |
2060 DEFUNX ("P_tmpdir", FP_tmpdir, args, , | |
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2061 "-*- texinfo -*-\n\ |
5749 | 2062 @deftypefn {Built-in Function} {} P_tmpdir ()\n\ |
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2063 Return the name of the host system's @strong{default} directory for\n\ |
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2064 temporary files.\n\ |
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2065 \n\ |
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2066 Programming Note: The value returned by @code{P_tmpdir} is always the\n\ |
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2067 default location. This value may not agree with that returned from\n\ |
20097
1f9ed81bd173
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2068 @code{tempdir} if the user has overridden the default with the @env{TMPDIR}\n\ |
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2069 environment variable.\n\ |
19278
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2070 @seealso{tempdir, tempname, mkstemp, tmpfile}\n\ |
5749 | 2071 @end deftypefn") |
2072 { | |
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2073 if (args.length () != 0) |
5823 | 2074 print_usage (); |
5749 | 2075 |
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2076 return octave_value (get_P_tmpdir ()); |
5749 | 2077 } |
2341 | 2078 |
5749 | 2079 // NOTE: the values of SEEK_SET, SEEK_CUR, and SEEK_END have to be |
2080 // this way for Matlab compatibility. | |
2081 | |
2082 DEFUNX ("SEEK_SET", FSEEK_SET, args, , | |
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2083 "-*- texinfo -*-\n\ |
10840 | 2084 @deftypefn {Built-in Function} {} SEEK_SET ()\n\ |
5749 | 2085 @deftypefnx {Built-in Function} {} SEEK_CUR ()\n\ |
2086 @deftypefnx {Built-in Function} {} SEEK_END ()\n\ | |
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2087 Return the numerical value to pass to @code{fseek} to perform one of the\n\ |
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2088 following actions:\n\ |
14366
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|
2089 \n\ |
3372 | 2090 @table @code\n\ |
2091 @item SEEK_SET\n\ | |
2092 Position file relative to the beginning.\n\ | |
2093 \n\ | |
2094 @item SEEK_CUR\n\ | |
2095 Position file relative to the current position.\n\ | |
2096 \n\ | |
2097 @item SEEK_END\n\ | |
5749 | 2098 Position file relative to the end.\n\ |
3372 | 2099 @end table\n\ |
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2100 @seealso{fseek}\n\ |
5749 | 2101 @end deftypefn") |
2102 { | |
2103 return const_value ("SEEK_SET", args, -1); | |
2104 } | |
2189 | 2105 |
5749 | 2106 DEFUNX ("SEEK_CUR", FSEEK_CUR, args, , |
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2107 "-*- texinfo -*-\n\ |
5749 | 2108 @deftypefn {Built-in Function} {} SEEK_CUR ()\n\ |
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2109 Return the numerical value to pass to @code{fseek} to\n\ |
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2110 position the file pointer relative to the current position.\n\ |
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2111 @seealso{SEEK_SET, SEEK_END}\n\ |
5749 | 2112 @end deftypefn") |
2113 { | |
2114 return const_value ("SEEK_CUR", args, 0); | |
2115 } | |
2189 | 2116 |
5749 | 2117 DEFUNX ("SEEK_END", FSEEK_END, args, , |
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2118 "-*- texinfo -*-\n\ |
5749 | 2119 @deftypefn {Built-in Function} {} SEEK_END ()\n\ |
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2120 Return the numerical value to pass to @code{fseek} to\n\ |
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2121 position the file pointer relative to the end of the file.\n\ |
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2122 @seealso{SEEK_SET, SEEK_CUR}\n\ |
5749 | 2123 @end deftypefn") |
2124 { | |
2125 return const_value ("SEEK_END", args, 1); | |
2126 } | |
2127 | |
2128 static octave_value | |
6483 | 2129 const_value (const char *, const octave_value_list& args, |
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2130 const octave_value& val) |
5749 | 2131 { |
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2132 if (args.length () != 0) |
5823 | 2133 print_usage (); |
5749 | 2134 |
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2135 return octave_value (val); |
5749 | 2136 } |
2137 | |
2138 DEFUNX ("stdin", Fstdin, args, , | |
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2139 "-*- texinfo -*-\n\ |
5749 | 2140 @deftypefn {Built-in Function} {} stdin ()\n\ |
2141 Return the numeric value corresponding to the standard input stream.\n\ | |
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2142 \n\ |
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2143 When Octave is used interactively, stdin is filtered through the command\n\ |
5749 | 2144 line editing functions.\n\ |
5333 | 2145 @seealso{stdout, stderr}\n\ |
5749 | 2146 @end deftypefn") |
2147 { | |
2148 return const_value ("stdin", args, stdin_file); | |
2149 } | |
2189 | 2150 |
5749 | 2151 DEFUNX ("stdout", Fstdout, args, , |
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2152 "-*- texinfo -*-\n\ |
5749 | 2153 @deftypefn {Built-in Function} {} stdout ()\n\ |
2154 Return the numeric value corresponding to the standard output stream.\n\ | |
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2155 \n\ |
5749 | 2156 Data written to the standard output is normally filtered through the pager.\n\ |
5333 | 2157 @seealso{stdin, stderr}\n\ |
5749 | 2158 @end deftypefn") |
2159 { | |
2160 return const_value ("stdout", args, stdout_file); | |
2161 } | |
2189 | 2162 |
5749 | 2163 DEFUNX ("stderr", Fstderr, args, , |
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2164 "-*- texinfo -*-\n\ |
5749 | 2165 @deftypefn {Built-in Function} {} stderr ()\n\ |
2166 Return the numeric value corresponding to the standard error stream.\n\ | |
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2167 \n\ |
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2168 Even if paging is turned on, the standard error is not sent to the pager.\n\ |
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2169 It is useful for error messages and prompts.\n\ |
5333 | 2170 @seealso{stdin, stdout}\n\ |
5749 | 2171 @end deftypefn") |
2172 { | |
2173 return const_value ("stderr", args, stderr_file); | |
2189 | 2174 } |