Mercurial > hg > octave-nkf
annotate src/utils.cc @ 12007:dc56a38b5a64 release-3-2-x
var.m: fix typos (thinkos?) in previous change
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 23 Jun 2009 12:57:57 +0200 |
| parents | 224634b2e6e3 |
| children | 2894af292e69 |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 8920 | 4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 John W. Eaton |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 240 | 24 #ifdef HAVE_CONFIG_H |
| 1192 | 25 #include <config.h> |
| 1 | 26 #endif |
| 27 | |
| 3716 | 28 #include <cerrno> |
| 1343 | 29 #include <climits> |
| 1346 | 30 #include <cstring> |
| 1343 | 31 |
| 3503 | 32 #include <fstream> |
| 33 #include <iostream> | |
| 1728 | 34 #include <string> |
| 35 | |
| 1350 | 36 #ifdef HAVE_UNISTD_H |
| 2442 | 37 #ifdef HAVE_SYS_TYPES_H |
| 1 | 38 #include <sys/types.h> |
| 2442 | 39 #endif |
| 1 | 40 #include <unistd.h> |
| 41 #endif | |
| 367 | 42 |
| 4302 | 43 #include "quit.h" |
| 44 | |
| 3040 | 45 #include "dir-ops.h" |
| 46 #include "file-ops.h" | |
| 2926 | 47 #include "file-stat.h" |
| 4732 | 48 #include "lo-mappers.h" |
| 1651 | 49 #include "oct-cmplx.h" |
| 2926 | 50 #include "oct-env.h" |
| 3040 | 51 #include "pathsearch.h" |
| 1755 | 52 #include "str-vec.h" |
| 1651 | 53 |
| 4216 | 54 #include "Cell.h" |
| 2492 | 55 #include <defaults.h> |
| 1352 | 56 #include "defun.h" |
| 57 #include "dirfns.h" | |
| 58 #include "error.h" | |
| 59 #include "gripes.h" | |
| 60 #include "input.h" | |
| 5832 | 61 #include "load-path.h" |
| 5465 | 62 #include "oct-errno.h" |
| 1742 | 63 #include "oct-hist.h" |
| 1750 | 64 #include "oct-obj.h" |
| 1352 | 65 #include "pager.h" |
| 1690 | 66 #include "sysdep.h" |
| 1750 | 67 #include "toplev.h" |
| 1 | 68 #include "unwind-prot.h" |
| 1352 | 69 #include "utils.h" |
| 70 #include "variables.h" | |
| 1 | 71 |
| 4143 | 72 // Return TRUE if S is a valid identifier. |
| 73 | |
| 74 bool | |
| 75 valid_identifier (const char *s) | |
| 76 { | |
| 5290 | 77 if (! s || ! (isalpha (*s) || *s == '_' || *s == '$')) |
| 4143 | 78 return false; |
| 79 | |
| 80 while (*++s != '\0') | |
| 5290 | 81 if (! (isalnum (*s) || *s == '_' || *s == '$')) |
| 4143 | 82 return false; |
| 83 | |
| 84 return true; | |
| 85 } | |
| 86 | |
| 87 bool | |
| 88 valid_identifier (const std::string& s) | |
| 89 { | |
| 90 return valid_identifier (s.c_str ()); | |
| 91 } | |
| 92 | |
|
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93 DEFUN (isvarname, args, , |
| 5040 | 94 "-*- texinfo -*-\n\ |
| 95 @deftypefn {Built-in Function} {} isvarname (@var{name})\n\ | |
| 4264 | 96 Return true if @var{name} is a valid variable name\n\ |
| 97 @end deftypefn") | |
| 98 { | |
| 99 octave_value retval; | |
| 100 | |
| 101 int argc = args.length () + 1; | |
| 102 | |
| 4610 | 103 string_vector argv = args.make_argv ("isvarname"); |
| 4264 | 104 |
| 105 if (error_state) | |
| 106 return retval; | |
| 107 | |
| 108 if (argc == 2) | |
| 109 retval = valid_identifier (argv[1]); | |
| 110 else | |
| 5823 | 111 print_usage (); |
| 4264 | 112 |
| 113 return retval; | |
| 114 } | |
| 115 | |
| 6323 | 116 // Return TRUE if F and G are both names for the same file. |
| 117 | |
| 118 bool | |
| 119 same_file (const std::string& f, const std::string& g) | |
| 120 { | |
| 6598 | 121 return same_file_internal (f, g); |
| 6323 | 122 } |
| 123 | |
| 1 | 124 int |
| 3523 | 125 almost_match (const std::string& std, const std::string& s, int min_match_len, |
| 526 | 126 int case_sens) |
| 1 | 127 { |
| 1755 | 128 int stdlen = std.length (); |
| 129 int slen = s.length (); | |
| 1 | 130 |
| 131 return (slen <= stdlen | |
| 132 && slen >= min_match_len | |
| 287 | 133 && (case_sens |
| 1755 | 134 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
| 3350 | 135 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
| 287 | 136 } |
| 137 | |
| 581 | 138 // Ugh. |
| 139 | |
| 287 | 140 int |
| 3523 | 141 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
| 287 | 142 int min_toks_to_match, int max_toks) |
| 143 { | |
| 144 int status = 0; | |
| 145 int tok_count = 0; | |
| 146 int toks_matched = 0; | |
| 147 | |
| 1755 | 148 if (s.empty () || max_toks < 1) |
| 287 | 149 return status; |
| 150 | |
| 1755 | 151 char *kw = strsave (s.c_str ()); |
| 287 | 152 |
| 153 char *t = kw; | |
| 154 while (*t != '\0') | |
| 155 { | |
| 156 if (*t == '\t') | |
| 157 *t = ' '; | |
| 158 t++; | |
| 159 } | |
| 160 | |
| 161 char *beg = kw; | |
| 162 while (*beg == ' ') | |
| 163 beg++; | |
| 164 | |
| 165 if (*beg == '\0') | |
| 166 return status; | |
| 167 | |
| 168 | |
| 3072 | 169 const char **to_match = new const char * [max_toks + 1]; |
| 170 const char * const *s1 = std; | |
| 171 const char **s2 = to_match; | |
| 287 | 172 |
| 526 | 173 if (! s1 || ! s2) |
| 287 | 174 goto done; |
| 175 | |
| 176 s2[tok_count] = beg; | |
| 177 char *end; | |
| 526 | 178 while ((end = strchr (beg, ' ')) != 0) |
| 287 | 179 { |
| 180 *end = '\0'; | |
| 181 beg = end + 1; | |
| 182 | |
| 183 while (*beg == ' ') | |
| 184 beg++; | |
| 185 | |
| 186 if (*beg == '\0') | |
| 187 break; | |
| 188 | |
| 189 tok_count++; | |
| 190 if (tok_count >= max_toks) | |
| 191 goto done; | |
| 192 | |
| 193 s2[tok_count] = beg; | |
| 194 } | |
| 526 | 195 s2[tok_count+1] = 0; |
| 287 | 196 |
| 197 s2 = to_match; | |
| 198 | |
| 199 for (;;) | |
| 200 { | |
| 201 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) | |
| 202 goto done; | |
| 203 | |
| 204 toks_matched++; | |
| 205 | |
| 206 s1++; | |
| 207 s2++; | |
| 208 | |
| 209 if (! *s2) | |
| 210 { | |
| 211 status = (toks_matched >= min_toks_to_match); | |
| 212 goto done; | |
| 213 } | |
| 214 | |
| 215 if (! *s1) | |
| 216 goto done; | |
| 217 } | |
| 218 | |
| 219 done: | |
| 220 | |
| 221 delete [] kw; | |
| 222 delete [] to_match; | |
| 223 | |
| 224 return status; | |
| 1 | 225 } |
| 226 | |
| 2234 | 227 // Return non-zero if either NR or NC is zero. Return -1 if this |
| 228 // should be considered fatal; return 1 if this is ok. | |
| 229 | |
| 230 int | |
| 5275 | 231 empty_arg (const char * /* name */, octave_idx_type nr, octave_idx_type nc) |
| 2234 | 232 { |
| 4478 | 233 return (nr == 0 || nc == 0); |
| 2234 | 234 } |
| 235 | |
| 581 | 236 // See if the given file is in the path. |
| 237 | |
| 3536 | 238 std::string |
| 4243 | 239 search_path_for_file (const std::string& path, const string_vector& names) |
| 686 | 240 { |
| 3174 | 241 dir_path p (path); |
| 686 | 242 |
| 4243 | 243 return octave_env::make_absolute (p.find_first_of (names), |
| 244 octave_env::getcwd ()); | |
| 686 | 245 } |
| 246 | |
| 4216 | 247 // Find all locations of the given file in the path. |
| 248 | |
| 249 string_vector | |
| 4243 | 250 search_path_for_all_files (const std::string& path, const string_vector& names) |
| 4216 | 251 { |
| 252 dir_path p (path); | |
| 253 | |
| 4243 | 254 string_vector sv = p.find_all_first_of (names); |
| 4216 | 255 |
| 6379 | 256 octave_idx_type len = sv.length (); |
| 4216 | 257 |
| 6379 | 258 for (octave_idx_type i = 0; i < len; i++) |
| 4216 | 259 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
| 260 | |
| 261 return sv; | |
| 262 } | |
| 263 | |
| 264 static string_vector | |
| 265 make_absolute (const string_vector& sv) | |
| 266 { | |
| 6379 | 267 octave_idx_type len = sv.length (); |
| 268 | |
| 269 string_vector retval (len); | |
| 4216 | 270 |
| 6379 | 271 for (octave_idx_type i = 0; i < len; i++) |
| 272 retval[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); | |
| 273 | |
| 274 return retval; | |
| 4216 | 275 } |
| 276 | |
| 3195 | 277 DEFUN (file_in_loadpath, args, , |
| 3446 | 278 "-*- texinfo -*-\n\ |
| 4216 | 279 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
| 280 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ | |
| 3195 | 281 \n\ |
| 5448 | 282 Return the absolute name of @var{file} if it can be found in\n\ |
| 5814 | 283 the list of directories specified by @code{path}.\n\ |
| 4216 | 284 If no file is found, return an empty matrix.\n\ |
| 285 \n\ | |
| 5448 | 286 If the first argument is a cell array of strings, search each\n\ |
| 4243 | 287 directory of the loadpath for element of the cell array and return\n\ |
| 288 the first that matches.\n\ | |
| 289 \n\ | |
| 4216 | 290 If the second optional argument @code{\"all\"} is supplied, return\n\ |
| 291 a cell array containing the list of all files that have the same\n\ | |
| 292 name in the path. If no files are found, return an empty cell array.\n\ | |
| 5814 | 293 @seealso{file_in_path, path}\n\ |
| 5642 | 294 @end deftypefn") |
| 3195 | 295 { |
| 4216 | 296 octave_value retval; |
| 3195 | 297 |
| 4243 | 298 int nargin = args.length (); |
| 3195 | 299 |
| 4243 | 300 if (nargin == 1 || nargin == 2) |
| 4216 | 301 { |
| 4243 | 302 string_vector names = args(0).all_strings (); |
| 303 | |
| 304 if (! error_state && names.length () > 0) | |
| 305 { | |
| 306 if (nargin == 1) | |
| 307 { | |
| 308 std::string fname = octave_env::make_absolute | |
| 5832 | 309 (load_path::find_first_of (names), octave_env::getcwd ()); |
| 4243 | 310 |
| 311 if (fname.empty ()) | |
| 312 retval = Matrix (); | |
| 313 else | |
| 314 retval = fname; | |
| 315 } | |
| 316 else if (nargin == 2) | |
| 317 { | |
| 318 std::string opt = args(1).string_value (); | |
| 319 | |
| 320 if (! error_state && opt == "all") | |
| 5832 | 321 retval = Cell (make_absolute (load_path::find_all_first_of (names))); |
| 4243 | 322 else |
| 4249 | 323 error ("file_in_loadpath: invalid option"); |
| 4243 | 324 } |
| 325 } | |
| 4216 | 326 else |
| 4243 | 327 error ("file_in_loadpath: expecting string as first argument"); |
| 4216 | 328 } |
| 3195 | 329 else |
| 5823 | 330 print_usage (); |
| 3195 | 331 |
| 332 return retval; | |
| 333 } | |
| 334 | |
| 1957 | 335 DEFUN (file_in_path, args, , |
| 3301 | 336 "-*- texinfo -*-\n\ |
| 337 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ | |
| 4216 | 338 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
| 5448 | 339 Return the absolute name of @var{file} if it can be found in\n\ |
| 3301 | 340 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
| 5814 | 341 directories in the format described for @code{path}. If no file\n\ |
| 5794 | 342 is found, return an empty matrix. For example,\n\ |
| 3301 | 343 \n\ |
| 344 @example\n\ | |
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345 @group\n\ |
| 5456 | 346 file_in_path (EXEC_PATH, \"sh\")\n\ |
| 347 @result{} \"/bin/sh\"\n\ | |
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348 @end group\n\ |
| 3301 | 349 @end example\n\ |
| 4216 | 350 \n\ |
| 5448 | 351 If the second argument is a cell array of strings, search each\n\ |
| 4243 | 352 directory of the path for element of the cell array and return\n\ |
| 353 the first that matches.\n\ | |
| 354 \n\ | |
| 4216 | 355 If the third optional argument @code{\"all\"} is supplied, return\n\ |
| 356 a cell array containing the list of all files that have the same\n\ | |
| 357 name in the path. If no files are found, return an empty cell array.\n\ | |
| 4249 | 358 @seealso{file_in_loadpath}\n\ |
| 3301 | 359 @end deftypefn") |
| 686 | 360 { |
| 4216 | 361 octave_value retval; |
| 686 | 362 |
| 4243 | 363 int nargin = args.length (); |
| 1755 | 364 |
| 4243 | 365 if (nargin == 2 || nargin == 3) |
| 686 | 366 { |
| 4243 | 367 std::string path = args(0).string_value (); |
| 368 | |
| 369 if (! error_state) | |
| 370 { | |
| 4249 | 371 string_vector names = args(1).all_strings (); |
| 4243 | 372 |
| 373 if (! error_state && names.length () > 0) | |
| 374 { | |
| 375 if (nargin == 2) | |
| 376 { | |
| 377 std::string fname = search_path_for_file (path, names); | |
| 686 | 378 |
| 4243 | 379 if (fname.empty ()) |
| 380 retval = Matrix (); | |
| 381 else | |
| 382 retval = fname; | |
| 383 } | |
| 384 else if (nargin == 3) | |
| 385 { | |
| 4249 | 386 std::string opt = args(2).string_value (); |
| 4243 | 387 |
| 388 if (! error_state && opt == "all") | |
| 389 retval = Cell (make_absolute (search_path_for_all_files (path, names))); | |
| 390 else | |
| 4249 | 391 error ("file_in_path: invalid option"); |
| 4243 | 392 } |
| 393 } | |
| 394 else | |
| 395 error ("file_in_path: expecting string as second argument"); | |
| 396 } | |
| 1755 | 397 else |
| 4243 | 398 error ("file_in_path: expecting string as first argument"); |
| 686 | 399 } |
| 400 else | |
| 5823 | 401 print_usage (); |
| 686 | 402 |
| 403 return retval; | |
| 404 } | |
| 405 | |
| 3536 | 406 std::string |
| 3523 | 407 file_in_path (const std::string& name, const std::string& suffix) |
| 526 | 408 { |
| 3523 | 409 std::string nm = name; |
| 526 | 410 |
| 1755 | 411 if (! suffix.empty ()) |
| 412 nm.append (suffix); | |
| 686 | 413 |
| 5832 | 414 return octave_env::make_absolute |
| 415 (load_path::find_file (nm), octave_env::getcwd ()); | |
| 526 | 416 } |
| 417 | |
| 581 | 418 // See if there is an function file in the path. If so, return the |
| 419 // full path to the file. | |
| 420 | |
| 3536 | 421 std::string |
| 3523 | 422 fcn_file_in_path (const std::string& name) |
| 526 | 423 { |
| 3523 | 424 std::string retval; |
| 908 | 425 |
| 1755 | 426 int len = name.length (); |
| 427 | |
| 428 if (len > 0) | |
| 429 { | |
| 5832 | 430 if (octave_env::absolute_pathname (name)) |
| 431 { | |
| 432 file_stat fs (name); | |
| 433 | |
| 434 if (fs.exists ()) | |
| 435 retval = name; | |
| 436 } | |
| 437 else if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') | |
| 438 retval = load_path::find_fcn_file (name.substr (0, len-2)); | |
| 908 | 439 else |
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440 { |
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441 std::string fname = name; |
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442 size_t pos = name.find_first_of (Vfilemarker); |
| 8021 | 443 if (pos != std::string::npos) |
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444 fname = name.substr (0, pos); |
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445 |
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446 retval = load_path::find_fcn_file (fname); |
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447 } |
| 908 | 448 } |
| 1755 | 449 |
| 450 return retval; | |
| 526 | 451 } |
| 452 | |
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453 // See if there is a directory called "name" in the path and if it |
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454 // contains a Contents.m file return the full path to this file. |
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455 |
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456 std::string |
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457 contents_file_in_path (const std::string& dir) |
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458 { |
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459 std::string retval; |
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460 |
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461 if (dir.length () > 0) |
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462 { |
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463 std::string tcontents = file_ops::concat (load_path::find_dir (dir), |
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464 std::string ("Contents.m")); |
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465 |
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466 file_stat fs (tcontents); |
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467 |
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468 if (fs.exists ()) |
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469 retval = octave_env::make_absolute (tcontents, octave_env::getcwd ()); |
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470 } |
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471 |
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472 return retval; |
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473 } |
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474 |
| 5864 | 475 // See if there is a .oct file in the path. If so, return the |
| 581 | 476 // full path to the file. |
| 477 | |
| 3536 | 478 std::string |
| 3523 | 479 oct_file_in_path (const std::string& name) |
| 572 | 480 { |
| 3523 | 481 std::string retval; |
| 908 | 482 |
| 1755 | 483 int len = name.length (); |
| 484 | |
| 485 if (len > 0) | |
| 486 { | |
| 5832 | 487 if (octave_env::absolute_pathname (name)) |
| 488 { | |
| 489 file_stat fs (name); | |
| 490 | |
| 491 if (fs.exists ()) | |
| 492 retval = name; | |
| 493 } | |
| 494 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'o' | |
| 495 && name [len - 2] == 'c' && name [len - 1] == 't') | |
| 496 retval = load_path::find_oct_file (name.substr (0, len-4)); | |
| 908 | 497 else |
| 5832 | 498 retval = load_path::find_oct_file (name); |
| 908 | 499 } |
| 1755 | 500 |
| 501 return retval; | |
| 572 | 502 } |
| 503 | |
| 5864 | 504 // See if there is a .mex file in the path. If so, return the |
| 505 // full path to the file. | |
| 506 | |
| 507 std::string | |
| 508 mex_file_in_path (const std::string& name) | |
| 509 { | |
| 510 std::string retval; | |
| 511 | |
| 512 int len = name.length (); | |
| 513 | |
| 514 if (len > 0) | |
| 515 { | |
| 516 if (octave_env::absolute_pathname (name)) | |
| 517 { | |
| 518 file_stat fs (name); | |
| 519 | |
| 520 if (fs.exists ()) | |
| 521 retval = name; | |
| 522 } | |
| 523 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'm' | |
| 524 && name [len - 2] == 'e' && name [len - 1] == 'x') | |
| 525 retval = load_path::find_mex_file (name.substr (0, len-4)); | |
| 526 else | |
| 527 retval = load_path::find_mex_file (name); | |
| 528 } | |
| 529 | |
| 530 return retval; | |
| 531 } | |
| 532 | |
| 3103 | 533 // Replace backslash escapes in a string with the real values. |
| 534 | |
| 3536 | 535 std::string |
| 3523 | 536 do_string_escapes (const std::string& s) |
| 3103 | 537 { |
| 3523 | 538 std::string retval; |
| 3103 | 539 |
| 540 size_t i = 0; | |
| 541 size_t j = 0; | |
| 542 size_t len = s.length (); | |
| 543 | |
| 544 retval.resize (len); | |
| 545 | |
| 546 while (j < len) | |
| 547 { | |
| 548 if (s[j] == '\\' && j+1 < len) | |
| 549 { | |
| 550 switch (s[++j]) | |
| 551 { | |
| 3893 | 552 case '0': |
| 553 retval[i] = '\0'; | |
| 554 break; | |
| 555 | |
| 3103 | 556 case 'a': |
| 557 retval[i] = '\a'; | |
| 558 break; | |
| 559 | |
| 560 case 'b': // backspace | |
| 561 retval[i] = '\b'; | |
| 562 break; | |
| 563 | |
| 564 case 'f': // formfeed | |
| 565 retval[i] = '\f'; | |
| 566 break; | |
| 567 | |
| 568 case 'n': // newline | |
| 569 retval[i] = '\n'; | |
| 570 break; | |
| 571 | |
| 572 case 'r': // carriage return | |
| 573 retval[i] = '\r'; | |
| 574 break; | |
| 575 | |
| 576 case 't': // horizontal tab | |
| 577 retval[i] = '\t'; | |
| 578 break; | |
| 579 | |
| 580 case 'v': // vertical tab | |
| 581 retval[i] = '\v'; | |
| 582 break; | |
| 583 | |
| 584 case '\\': // backslash | |
| 585 retval[i] = '\\'; | |
| 586 break; | |
| 587 | |
| 588 case '\'': // quote | |
| 589 retval[i] = '\''; | |
| 590 break; | |
| 591 | |
| 592 case '"': // double quote | |
| 593 retval[i] = '"'; | |
| 594 break; | |
| 595 | |
| 596 default: | |
| 597 warning ("unrecognized escape sequence `\\%c' --\ | |
| 598 converting to `%c'", s[j], s[j]); | |
| 599 retval[i] = s[j]; | |
| 600 break; | |
| 601 } | |
| 602 } | |
| 603 else | |
| 604 { | |
| 605 retval[i] = s[j]; | |
| 606 } | |
| 607 | |
| 608 i++; | |
| 609 j++; | |
| 610 } | |
| 611 | |
| 3105 | 612 retval.resize (i); |
| 3103 | 613 |
| 614 return retval; | |
| 615 } | |
| 616 | |
| 617 DEFUN (do_string_escapes, args, , | |
| 3446 | 618 "-*- texinfo -*-\n\ |
| 619 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ | |
| 620 Convert special characters in @var{string} to their escaped forms.\n\ | |
| 621 @end deftypefn") | |
| 3103 | 622 { |
| 623 octave_value retval; | |
| 624 | |
| 625 int nargin = args.length (); | |
| 626 | |
| 627 if (nargin == 1) | |
| 628 { | |
| 629 if (args(0).is_string ()) | |
| 630 retval = do_string_escapes (args(0).string_value ()); | |
| 631 else | |
| 632 error ("do_string_escapes: argument must be a string"); | |
| 633 } | |
| 634 else | |
| 5823 | 635 print_usage (); |
| 3103 | 636 |
| 637 return retval; | |
| 638 } | |
| 639 | |
| 1755 | 640 const char * |
| 801 | 641 undo_string_escape (char c) |
| 642 { | |
| 643 if (! c) | |
| 1755 | 644 return ""; |
| 801 | 645 |
| 646 switch (c) | |
| 647 { | |
| 3893 | 648 case '\0': |
| 649 return "\\0"; | |
| 650 | |
| 801 | 651 case '\a': |
| 652 return "\\a"; | |
| 653 | |
| 654 case '\b': // backspace | |
| 655 return "\\b"; | |
| 656 | |
| 657 case '\f': // formfeed | |
| 658 return "\\f"; | |
| 659 | |
| 660 case '\n': // newline | |
| 661 return "\\n"; | |
| 662 | |
| 663 case '\r': // carriage return | |
| 664 return "\\r"; | |
| 665 | |
| 666 case '\t': // horizontal tab | |
| 667 return "\\t"; | |
| 668 | |
| 669 case '\v': // vertical tab | |
| 670 return "\\v"; | |
| 671 | |
| 672 case '\\': // backslash | |
| 673 return "\\\\"; | |
| 674 | |
| 675 case '"': // double quote | |
| 676 return "\\\""; | |
| 677 | |
| 678 default: | |
| 1755 | 679 { |
| 680 static char retval[2]; | |
| 681 retval[0] = c; | |
| 682 retval[1] = '\0'; | |
| 683 return retval; | |
| 684 } | |
| 801 | 685 } |
| 686 } | |
| 687 | |
| 3536 | 688 std::string |
| 3523 | 689 undo_string_escapes (const std::string& s) |
| 801 | 690 { |
| 3523 | 691 std::string retval; |
| 801 | 692 |
| 1755 | 693 for (size_t i = 0; i < s.length (); i++) |
| 694 retval.append (undo_string_escape (s[i])); | |
| 801 | 695 |
| 1755 | 696 return retval; |
| 801 | 697 } |
| 698 | |
| 1957 | 699 DEFUN (undo_string_escapes, args, , |
| 3361 | 700 "-*- texinfo -*-\n\ |
| 701 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ | |
| 702 Converts special characters in strings back to their escaped forms. For\n\ | |
| 703 example, the expression\n\ | |
| 704 \n\ | |
| 705 @example\n\ | |
| 706 bell = \"\\a\";\n\ | |
| 707 @end example\n\ | |
| 708 \n\ | |
| 709 @noindent\n\ | |
| 710 assigns the value of the alert character (control-g, ASCII code 7) to\n\ | |
| 711 the string variable @code{bell}. If this string is printed, the\n\ | |
| 712 system will ring the terminal bell (if it is possible). This is\n\ | |
| 713 normally the desired outcome. However, sometimes it is useful to be\n\ | |
| 714 able to print the original representation of the string, with the\n\ | |
| 715 special characters replaced by their escape sequences. For example,\n\ | |
| 716 \n\ | |
| 717 @example\n\ | |
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718 @group\n\ |
| 3361 | 719 octave:13> undo_string_escapes (bell)\n\ |
| 720 ans = \\a\n\ | |
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721 @end group\n\ |
| 3361 | 722 @end example\n\ |
| 723 \n\ | |
| 724 @noindent\n\ | |
| 725 replaces the unprintable alert character with its printable\n\ | |
| 726 representation.\n\ | |
| 727 @end deftypefn") | |
| 801 | 728 { |
| 2086 | 729 octave_value retval; |
| 801 | 730 |
| 731 int nargin = args.length (); | |
| 732 | |
| 3103 | 733 if (nargin == 1) |
| 734 { | |
| 735 if (args(0).is_string ()) | |
| 736 retval = undo_string_escapes (args(0).string_value ()); | |
| 737 else | |
| 738 error ("undo_string_escapes: argument must be a string"); | |
| 739 } | |
| 801 | 740 else |
| 5823 | 741 print_usage (); |
| 801 | 742 |
| 743 return retval; | |
| 744 } | |
| 745 | |
| 8229 | 746 DEFUN (is_absolute_filename, args, , |
| 747 "-*- texinfo -*-\n\ | |
| 748 @deftypefn {Built-in Function} {} is_absolute_filename (@var{file})\n\ | |
| 749 Return true if @var{file} is an absolute filename.\n\ | |
| 750 @end deftypefn") | |
| 751 { | |
| 752 octave_value retval = false; | |
| 753 | |
| 754 if (args.length () == 1) | |
| 755 retval = (args(0).is_string () | |
| 756 && octave_env::absolute_pathname (args(0).string_value ())); | |
| 757 else | |
| 758 print_usage (); | |
| 759 | |
| 760 return retval; | |
| 761 } | |
| 762 | |
| 763 DEFUN (is_rooted_relative_filename, args, , | |
| 764 "-*- texinfo -*-\n\ | |
| 765 @deftypefn {Built-in Function} {} is_rooted_relative_filename (@var{file})\n\ | |
| 766 Return true if @var{file} is a rooted-relative filename.\n\ | |
| 767 @end deftypefn") | |
| 768 { | |
| 769 octave_value retval = false; | |
| 770 | |
| 771 if (args.length () == 1) | |
| 772 retval = (args(0).is_string () | |
| 773 && octave_env::rooted_relative_pathname (args(0).string_value ())); | |
| 774 else | |
| 775 print_usage (); | |
| 776 | |
| 777 return retval; | |
| 778 } | |
| 779 | |
| 780 DEFUN (make_absolute_filename, args, , | |
| 781 "-*- texinfo -*-\n\ | |
| 782 @deftypefn {Built-in Function} {} make_absolute_filename (@var{file})\n\ | |
| 783 Return the full name of @var{file}, relative to the current directory.\n\ | |
| 784 @end deftypefn") | |
| 785 { | |
| 786 octave_value retval = std::string (); | |
| 787 | |
| 788 if (args.length () == 1) | |
| 789 { | |
| 790 std::string nm = args(0).string_value (); | |
| 791 | |
| 792 if (! error_state) | |
| 793 retval = octave_env::make_absolute (nm, octave_env::getcwd ()); | |
| 794 else | |
| 795 error ("make_absolute_filename: expecting argument to be a file name"); | |
| 796 } | |
| 797 else | |
| 798 print_usage (); | |
| 799 | |
| 800 return retval; | |
| 801 } | |
| 802 | |
| 803 DEFUN (find_dir_in_path, args, , | |
| 804 "-*- texinfo -*-\n\ | |
| 805 @deftypefn {Built-in Function} {} find_dir_in_path (@var{dir})\n\ | |
| 806 Return the full name of the path element matching @var{dir}. The\n\ | |
| 807 match is performed at the end of each path element. For example, if\n\ | |
| 808 @var{dir} is @code{\"foo/bar\"}, it matches the path element\n\ | |
| 809 @code{\"/some/dir/foo/bar\"}, but not @code{\"/some/dir/foo/bar/baz\"}\n\ | |
| 8715 | 810 or @code{\"/some/dir/allfoo/bar\"}.\n\ |
| 8229 | 811 @end deftypefn") |
| 812 { | |
| 813 octave_value retval = std::string (); | |
| 814 | |
| 815 if (args.length () == 1) | |
| 816 { | |
| 817 std::string dir = args(0).string_value (); | |
| 818 | |
| 819 if (! error_state) | |
| 820 retval = load_path::find_dir (dir); | |
| 821 else | |
| 822 error ("find_dir_in_path: expecting argument to be a directory name"); | |
| 823 } | |
| 824 else | |
| 825 print_usage (); | |
| 826 | |
| 827 return retval; | |
| 828 } | |
| 829 | |
| 5465 | 830 DEFUNX ("errno", Ferrno, args, , |
| 3716 | 831 "-*- texinfo -*-\n\ |
| 5465 | 832 @deftypefn {Built-in Function} {@var{err} =} errno ()\n\ |
| 833 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{val})\n\ | |
| 834 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{name})\n\ | |
| 835 Return the current value of the system-dependent variable errno,\n\ | |
| 836 set its value to @var{val} and return the previous value, or return\n\ | |
| 837 the named error code given @var{name} as a character string, or -1\n\ | |
| 838 if @var{name} is not found.\n\ | |
| 3716 | 839 @end deftypefn") |
| 840 { | |
| 841 octave_value retval; | |
| 842 | |
| 5465 | 843 int nargin = args.length (); |
| 844 | |
| 845 if (nargin == 1) | |
| 846 { | |
| 847 if (args(0).is_string ()) | |
| 848 { | |
| 849 std::string nm = args(0).string_value (); | |
| 850 | |
| 851 if (! error_state) | |
| 852 retval = octave_errno::lookup (nm); | |
| 853 else | |
| 854 error ("errno: expecting character string argument"); | |
| 855 } | |
| 856 else | |
| 857 { | |
| 858 int val = args(0).int_value (); | |
| 859 | |
| 860 if (! error_state) | |
| 861 retval = octave_errno::set (val); | |
| 862 else | |
| 863 error ("errno: expecting integer argument"); | |
| 864 } | |
| 865 } | |
| 866 else if (nargin == 0) | |
| 867 retval = octave_errno::get (); | |
| 3716 | 868 else |
| 5823 | 869 print_usage (); |
| 3716 | 870 |
| 871 return retval; | |
| 872 } | |
| 873 | |
| 5465 | 874 DEFUN (errno_list, args, , |
| 875 "-*- texinfo -*-\n\ | |
| 876 @deftypefn {Built-in Function} {} errno_list ()\n\ | |
| 877 Return a structure containing the system-dependent errno values.\n\ | |
| 878 @end deftypefn") | |
| 879 { | |
| 880 octave_value retval; | |
| 881 | |
| 882 if (args.length () == 0) | |
| 883 retval = octave_errno::list (); | |
| 884 else | |
| 5823 | 885 print_usage (); |
| 5465 | 886 |
| 887 return retval; | |
| 888 } | |
| 3716 | 889 |
| 2285 | 890 static void |
| 5275 | 891 check_dimensions (octave_idx_type& nr, octave_idx_type& nc, const char *warnfor) |
| 3354 | 892 { |
| 893 if (nr < 0 || nc < 0) | |
| 894 { | |
| 5781 | 895 warning_with_id ("Octave:neg-dim-as-zero", |
| 896 "%s: converting negative dimension to zero", warnfor); | |
| 3354 | 897 |
| 4457 | 898 nr = (nr < 0) ? 0 : nr; |
| 899 nc = (nc < 0) ? 0 : nc; | |
| 3354 | 900 } |
| 901 } | |
| 902 | |
| 903 void | |
| 4513 | 904 check_dimensions (dim_vector& dim, const char *warnfor) |
| 4481 | 905 { |
| 906 bool neg = false; | |
| 907 | |
| 908 for (int i = 0; i < dim.length (); i++) | |
| 909 { | |
| 910 if (dim(i) < 0) | |
| 911 { | |
| 912 dim(i) = 0; | |
| 913 neg = true; | |
| 914 } | |
| 915 } | |
| 916 | |
| 5781 | 917 if (neg) |
| 918 warning_with_id ("Octave:neg-dim-as-zero", | |
| 919 "%s: converting negative dimension to zero", warnfor); | |
| 4481 | 920 } |
| 921 | |
| 922 | |
| 923 void | |
| 924 get_dimensions (const octave_value& a, const char *warn_for, | |
| 4513 | 925 dim_vector& dim) |
| 4481 | 926 { |
| 927 if (a.is_scalar_type ()) | |
| 928 { | |
| 929 dim.resize (2); | |
| 4732 | 930 dim(0) = a.int_value (); |
| 4481 | 931 dim(1) = dim(0); |
| 932 } | |
| 933 else | |
| 934 { | |
| 5275 | 935 octave_idx_type nr = a.rows (); |
| 936 octave_idx_type nc = a.columns (); | |
| 4481 | 937 |
| 938 if (nr == 1 || nc == 1) | |
| 939 { | |
| 940 Array<double> v = a.vector_value (); | |
| 941 | |
| 942 if (error_state) | |
| 943 return; | |
| 944 | |
| 5275 | 945 octave_idx_type n = v.length (); |
| 4481 | 946 dim.resize (n); |
| 5275 | 947 for (octave_idx_type i = 0; i < n; i++) |
| 4783 | 948 dim(i) = static_cast<int> (fix (v(i))); |
| 4481 | 949 } |
| 950 else | |
| 5257 | 951 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
| 4481 | 952 } |
| 953 | |
| 5258 | 954 if (! error_state) |
| 955 check_dimensions (dim, warn_for); // May set error_state. | |
| 4481 | 956 } |
| 957 | |
| 958 | |
| 959 void | |
| 3354 | 960 get_dimensions (const octave_value& a, const char *warn_for, |
| 5275 | 961 octave_idx_type& nr, octave_idx_type& nc) |
| 3354 | 962 { |
| 963 if (a.is_scalar_type ()) | |
| 964 { | |
| 4732 | 965 nr = nc = a.int_value (); |
| 3354 | 966 } |
| 967 else | |
| 968 { | |
| 969 nr = a.rows (); | |
| 970 nc = a.columns (); | |
| 971 | |
| 972 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) | |
| 973 { | |
| 3419 | 974 Array<double> v = a.vector_value (); |
| 3354 | 975 |
| 976 if (error_state) | |
| 977 return; | |
| 978 | |
| 5275 | 979 nr = static_cast<octave_idx_type> (fix (v (0))); |
| 980 nc = static_cast<octave_idx_type> (fix (v (1))); | |
| 3354 | 981 } |
| 982 else | |
| 5257 | 983 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
| 3354 | 984 } |
| 985 | |
| 5258 | 986 if (! error_state) |
| 987 check_dimensions (nr, nc, warn_for); // May set error_state. | |
| 3354 | 988 } |
| 989 | |
| 990 void | |
| 991 get_dimensions (const octave_value& a, const octave_value& b, | |
| 5275 | 992 const char *warn_for, octave_idx_type& nr, octave_idx_type& nc) |
| 3354 | 993 { |
| 4732 | 994 nr = a.is_empty () ? 0 : a.int_value (); |
| 995 nc = b.is_empty () ? 0 : b.int_value (); | |
| 3354 | 996 |
| 997 if (error_state) | |
| 998 error ("%s: expecting two scalar arguments", warn_for); | |
| 999 else | |
| 1000 check_dimensions (nr, nc, warn_for); // May set error_state. | |
| 1001 } | |
| 1002 | |
| 4478 | 1003 Matrix |
| 5275 | 1004 identity_matrix (octave_idx_type nr, octave_idx_type nc) |
| 4478 | 1005 { |
| 1006 Matrix m (nr, nc, 0.0); | |
| 1007 | |
| 1008 if (nr > 0 && nc > 0) | |
| 1009 { | |
| 5275 | 1010 octave_idx_type n = std::min (nr, nc); |
| 4478 | 1011 |
| 5275 | 1012 for (octave_idx_type i = 0; i < n; i++) |
| 4478 | 1013 m (i, i) = 1.0; |
| 1014 } | |
| 1015 | |
| 1016 return m; | |
| 1017 } | |
| 1018 | |
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1019 FloatMatrix |
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1020 float_identity_matrix (octave_idx_type nr, octave_idx_type nc) |
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1021 { |
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1022 FloatMatrix m (nr, nc, 0.0); |
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1023 |
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1024 if (nr > 0 && nc > 0) |
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1025 { |
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1026 octave_idx_type n = std::min (nr, nc); |
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1027 |
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1028 for (octave_idx_type i = 0; i < n; i++) |
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1029 m (i, i) = 1.0; |
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1030 } |
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1031 |
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1032 return m; |
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1033 } |
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1034 |
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1035 int |
| 3622 | 1036 octave_format (std::ostream& os, const char *fmt, ...) |
| 3620 | 1037 { |
| 1038 int retval = -1; | |
| 1039 | |
| 1040 va_list args; | |
| 1041 va_start (args, fmt); | |
| 1042 | |
| 1043 retval = octave_vformat (os, fmt, args); | |
| 1044 | |
| 1045 va_end (args); | |
| 1046 | |
| 1047 return retval; | |
| 1048 } | |
| 1049 | |
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1050 int |
| 3622 | 1051 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
| 3620 | 1052 { |
| 1053 int retval = -1; | |
| 1054 | |
| 3775 | 1055 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
| 3620 | 1056 |
| 4135 | 1057 std::streambuf *sb = os.rdbuf (); |
| 1058 | |
| 1059 if (sb) | |
| 4302 | 1060 { |
| 1061 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1062 | |
| 1063 retval = sb->vform (fmt, args); | |
| 1064 | |
| 1065 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1066 } | |
| 3620 | 1067 |
| 1068 #else | |
| 1069 | |
| 1070 char *s = octave_vsnprintf (fmt, args); | |
| 1071 | |
| 1072 if (s) | |
| 1073 { | |
| 1074 os << s; | |
| 1075 | |
| 1076 retval = strlen (s); | |
| 1077 } | |
| 1078 | |
| 1079 #endif | |
| 1080 | |
| 1081 return retval; | |
| 1082 } | |
| 1083 | |
| 4302 | 1084 // We manage storage. User should not free it, and its contents are |
| 1085 // only valid until next call to vsnprintf. | |
| 1086 | |
| 1087 // Interrupts might happen if someone makes a call with something that | |
| 1088 // will require a very large buffer. If we are interrupted in that | |
| 1089 // case, we should make the buffer size smaller for the next call. | |
| 1090 | |
| 1091 #define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF \ | |
| 1092 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \ | |
| 1093 delete [] buf; \ | |
| 1094 buf = 0; \ | |
| 1095 size = initial_size; \ | |
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1096 octave_rethrow_exception (); \ |
| 4302 | 1097 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 |
| 1098 | |
| 4485 | 1099 #if defined __GNUC__ && defined __va_copy |
| 1100 #define SAVE_ARGS(saved_args, args) __va_copy (saved_args, args) | |
| 1101 #elif defined va_copy | |
| 1102 #define SAVE_ARGS(saved_args, args) va_copy (saved_args, args) | |
| 1103 #else | |
| 1104 #define SAVE_ARGS(saved_args, args) saved_args = args | |
| 1105 #endif | |
| 1106 | |
| 4302 | 1107 char * |
| 1108 octave_vsnprintf (const char *fmt, va_list args) | |
| 1109 { | |
| 1110 static const size_t initial_size = 100; | |
| 1111 | |
| 1112 static size_t size = initial_size; | |
| 1113 | |
| 1114 static char *buf = 0; | |
| 1115 | |
| 4482 | 1116 #if defined (HAVE_C99_VSNPRINTF) |
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1117 size_t nchars = 0; |
| 4482 | 1118 #else |
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1119 int nchars = 0; |
| 4482 | 1120 #endif |
| 4302 | 1121 |
| 1122 if (! buf) | |
| 1123 buf = new char [size]; | |
| 1124 | |
| 1125 if (! buf) | |
| 1126 return 0; | |
| 1127 | |
| 1128 #if defined (HAVE_C99_VSNPRINTF) | |
| 1129 | |
| 4485 | 1130 // Note that the caller is responsible for calling va_end on args. |
| 1131 // We will do it for saved_args. | |
| 1132 | |
| 1133 va_list saved_args; | |
| 1134 | |
| 1135 SAVE_ARGS (saved_args, args); | |
| 1136 | |
| 4302 | 1137 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
| 1138 | |
| 1139 nchars = octave_raw_vsnprintf (buf, size, fmt, args); | |
| 1140 | |
| 1141 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1142 | |
| 1143 if (nchars >= size) | |
| 1144 { | |
| 1145 size = nchars + 1; | |
| 1146 | |
| 1147 delete [] buf; | |
| 1148 | |
| 1149 buf = new char [size]; | |
| 1150 | |
| 1151 if (buf) | |
| 1152 { | |
| 1153 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; | |
| 1154 | |
| 4485 | 1155 octave_raw_vsnprintf (buf, size, fmt, saved_args); |
| 4302 | 1156 |
| 1157 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1158 } | |
| 1159 } | |
| 1160 | |
| 4485 | 1161 va_end (saved_args); |
| 1162 | |
| 4302 | 1163 #else |
| 1164 | |
| 1165 while (1) | |
| 1166 { | |
| 4485 | 1167 va_list saved_args; |
| 1168 | |
| 1169 SAVE_ARGS (saved_args, args); | |
| 1170 | |
| 4302 | 1171 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
| 1172 | |
| 4485 | 1173 nchars = octave_raw_vsnprintf (buf, size, fmt, saved_args); |
| 1174 | |
| 1175 va_end (saved_args); | |
| 4302 | 1176 |
| 1177 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1178 | |
| 4351 | 1179 if (nchars > -1 && nchars < size-1) |
| 4302 | 1180 return buf; |
| 1181 else | |
| 1182 { | |
| 1183 delete [] buf; | |
| 1184 | |
| 1185 size *= 2; | |
| 1186 | |
| 1187 buf = new char [size]; | |
| 1188 | |
| 1189 if (! buf) | |
| 1190 return 0; | |
| 1191 } | |
| 1192 } | |
| 1193 | |
| 1194 #endif | |
| 1195 | |
| 1196 return buf; | |
| 1197 } | |
| 1198 | |
| 1199 char * | |
| 1200 octave_snprintf (const char *fmt, ...) | |
| 1201 { | |
| 1202 char *retval = 0; | |
| 1203 | |
| 1204 va_list args; | |
| 1205 va_start (args, fmt); | |
| 1206 | |
| 1207 retval = octave_vsnprintf (fmt, args); | |
| 1208 | |
| 1209 va_end (args); | |
| 1210 | |
| 1211 return retval; | |
| 1212 } | |
| 1213 | |
| 4086 | 1214 void |
| 1215 octave_sleep (double seconds) | |
| 1216 { | |
| 1217 if (seconds > 0) | |
| 1218 { | |
| 1219 double t; | |
| 1220 | |
| 4093 | 1221 unsigned int usec |
| 4783 | 1222 = static_cast<unsigned int> (modf (seconds, &t) * 1000000); |
| 4086 | 1223 |
| 4093 | 1224 unsigned int sec |
| 4783 | 1225 = (t > UINT_MAX) ? UINT_MAX : static_cast<unsigned int> (t); |
| 4086 | 1226 |
| 5770 | 1227 // Versions of these functions that accept unsigned int args are |
| 1228 // defined in cutils.c. | |
| 4086 | 1229 octave_sleep (sec); |
| 1230 octave_usleep (usec); | |
| 1231 } | |
| 1232 } | |
| 1233 | |
| 572 | 1234 /* |
| 1 | 1235 ;;; Local Variables: *** |
| 1236 ;;; mode: C++ *** | |
| 1237 ;;; End: *** | |
| 1238 */ |