|
1
|
1 /* |
|
|
2 |
|
2847
|
3 Copyright (C) 1996, 1997 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 |
|
|
9 Free Software Foundation; either version 2, or (at your option) any |
|
|
10 later version. |
|
|
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 |
|
|
18 along with Octave; see the file COPYING. If not, write to the Free |
|
1315
|
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
1
|
20 |
|
|
21 */ |
|
|
22 |
|
240
|
23 #ifdef HAVE_CONFIG_H |
|
1192
|
24 #include <config.h> |
|
1
|
25 #endif |
|
|
26 |
|
3716
|
27 #include <cerrno> |
|
1343
|
28 #include <climits> |
|
1346
|
29 #include <cstring> |
|
1343
|
30 |
|
3503
|
31 #include <fstream> |
|
|
32 #include <iostream> |
|
1728
|
33 #include <string> |
|
|
34 |
|
1350
|
35 #ifdef HAVE_UNISTD_H |
|
2442
|
36 #ifdef HAVE_SYS_TYPES_H |
|
1
|
37 #include <sys/types.h> |
|
2442
|
38 #endif |
|
1
|
39 #include <unistd.h> |
|
|
40 #endif |
|
367
|
41 |
|
3566
|
42 // Include setjmp.h, not csetjmp since the latter might only define |
|
|
43 // the ANSI standard C interface. |
|
|
44 |
|
|
45 #include <setjmp.h> |
|
|
46 |
|
3040
|
47 #include "dir-ops.h" |
|
|
48 #include "file-ops.h" |
|
2926
|
49 #include "file-stat.h" |
|
4051
|
50 #include "lo-sstream.h" |
|
1651
|
51 #include "oct-cmplx.h" |
|
2926
|
52 #include "oct-env.h" |
|
3040
|
53 #include "pathsearch.h" |
|
1755
|
54 #include "str-vec.h" |
|
1651
|
55 |
|
4216
|
56 #include "Cell.h" |
|
2492
|
57 #include <defaults.h> |
|
1352
|
58 #include "defun.h" |
|
|
59 #include "dirfns.h" |
|
|
60 #include "error.h" |
|
|
61 #include "gripes.h" |
|
|
62 #include "input.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 |
|
3354
|
72 // Should expressions like ones (-1, 5) result in an empty matrix or |
|
|
73 // an error? A positive value means yes. A negative value means |
|
|
74 // yes, but print a warning message. Zero means it should be |
|
|
75 // considered an error. |
|
|
76 static int Vtreat_neg_dim_as_zero; |
|
|
77 |
|
4143
|
78 // Return TRUE if S is a valid identifier. |
|
|
79 |
|
|
80 bool |
|
|
81 valid_identifier (const char *s) |
|
|
82 { |
|
|
83 if (! s || ! (isalnum (*s) || *s == '_')) |
|
|
84 return false; |
|
|
85 |
|
|
86 while (*++s != '\0') |
|
|
87 if (! (isalnum (*s) || *s == '_')) |
|
|
88 return false; |
|
|
89 |
|
|
90 return true; |
|
|
91 } |
|
|
92 |
|
|
93 bool |
|
|
94 valid_identifier (const std::string& s) |
|
|
95 { |
|
|
96 return valid_identifier (s.c_str ()); |
|
|
97 } |
|
|
98 |
|
1
|
99 int |
|
3523
|
100 almost_match (const std::string& std, const std::string& s, int min_match_len, |
|
526
|
101 int case_sens) |
|
1
|
102 { |
|
1755
|
103 int stdlen = std.length (); |
|
|
104 int slen = s.length (); |
|
1
|
105 |
|
|
106 return (slen <= stdlen |
|
|
107 && slen >= min_match_len |
|
287
|
108 && (case_sens |
|
1755
|
109 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
|
3350
|
110 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
|
287
|
111 } |
|
|
112 |
|
581
|
113 // Ugh. |
|
|
114 |
|
287
|
115 int |
|
3523
|
116 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
|
287
|
117 int min_toks_to_match, int max_toks) |
|
|
118 { |
|
|
119 int status = 0; |
|
|
120 int tok_count = 0; |
|
|
121 int toks_matched = 0; |
|
|
122 |
|
1755
|
123 if (s.empty () || max_toks < 1) |
|
287
|
124 return status; |
|
|
125 |
|
1755
|
126 char *kw = strsave (s.c_str ()); |
|
287
|
127 |
|
|
128 char *t = kw; |
|
|
129 while (*t != '\0') |
|
|
130 { |
|
|
131 if (*t == '\t') |
|
|
132 *t = ' '; |
|
|
133 t++; |
|
|
134 } |
|
|
135 |
|
|
136 char *beg = kw; |
|
|
137 while (*beg == ' ') |
|
|
138 beg++; |
|
|
139 |
|
|
140 if (*beg == '\0') |
|
|
141 return status; |
|
|
142 |
|
|
143 |
|
3072
|
144 const char **to_match = new const char * [max_toks + 1]; |
|
|
145 const char * const *s1 = std; |
|
|
146 const char **s2 = to_match; |
|
287
|
147 |
|
526
|
148 if (! s1 || ! s2) |
|
287
|
149 goto done; |
|
|
150 |
|
|
151 s2[tok_count] = beg; |
|
|
152 char *end; |
|
526
|
153 while ((end = strchr (beg, ' ')) != 0) |
|
287
|
154 { |
|
|
155 *end = '\0'; |
|
|
156 beg = end + 1; |
|
|
157 |
|
|
158 while (*beg == ' ') |
|
|
159 beg++; |
|
|
160 |
|
|
161 if (*beg == '\0') |
|
|
162 break; |
|
|
163 |
|
|
164 tok_count++; |
|
|
165 if (tok_count >= max_toks) |
|
|
166 goto done; |
|
|
167 |
|
|
168 s2[tok_count] = beg; |
|
|
169 } |
|
526
|
170 s2[tok_count+1] = 0; |
|
287
|
171 |
|
|
172 s2 = to_match; |
|
|
173 |
|
|
174 for (;;) |
|
|
175 { |
|
|
176 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
|
|
177 goto done; |
|
|
178 |
|
|
179 toks_matched++; |
|
|
180 |
|
|
181 s1++; |
|
|
182 s2++; |
|
|
183 |
|
|
184 if (! *s2) |
|
|
185 { |
|
|
186 status = (toks_matched >= min_toks_to_match); |
|
|
187 goto done; |
|
|
188 } |
|
|
189 |
|
|
190 if (! *s1) |
|
|
191 goto done; |
|
|
192 } |
|
|
193 |
|
|
194 done: |
|
|
195 |
|
|
196 delete [] kw; |
|
|
197 delete [] to_match; |
|
|
198 |
|
|
199 return status; |
|
1
|
200 } |
|
|
201 |
|
2234
|
202 // Return non-zero if either NR or NC is zero. Return -1 if this |
|
|
203 // should be considered fatal; return 1 if this is ok. |
|
|
204 |
|
|
205 int |
|
|
206 empty_arg (const char *name, int nr, int nc) |
|
|
207 { |
|
|
208 int is_empty = 0; |
|
|
209 |
|
|
210 if (nr == 0 || nc == 0) |
|
|
211 { |
|
|
212 int flag = Vpropagate_empty_matrices; |
|
|
213 |
|
|
214 if (flag < 0) |
|
|
215 { |
|
|
216 gripe_empty_arg (name, 0); |
|
|
217 is_empty = 1; |
|
|
218 } |
|
|
219 else if (flag == 0) |
|
|
220 { |
|
|
221 gripe_empty_arg (name, 1); |
|
|
222 is_empty = -1; |
|
|
223 } |
|
|
224 else |
|
|
225 is_empty = 1; |
|
|
226 } |
|
|
227 |
|
|
228 return is_empty; |
|
|
229 } |
|
|
230 |
|
581
|
231 // See if the given file is in the path. |
|
|
232 |
|
3536
|
233 std::string |
|
4243
|
234 search_path_for_file (const std::string& path, const string_vector& names) |
|
686
|
235 { |
|
3174
|
236 dir_path p (path); |
|
686
|
237 |
|
4243
|
238 return octave_env::make_absolute (p.find_first_of (names), |
|
|
239 octave_env::getcwd ()); |
|
686
|
240 } |
|
|
241 |
|
4216
|
242 // Find all locations of the given file in the path. |
|
|
243 |
|
|
244 string_vector |
|
4243
|
245 search_path_for_all_files (const std::string& path, const string_vector& names) |
|
4216
|
246 { |
|
|
247 dir_path p (path); |
|
|
248 |
|
4243
|
249 string_vector sv = p.find_all_first_of (names); |
|
4216
|
250 |
|
|
251 int len = sv.length (); |
|
|
252 |
|
|
253 for (int i = 0; i < len; i++) |
|
|
254 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
|
|
255 |
|
|
256 return sv; |
|
|
257 } |
|
|
258 |
|
|
259 static string_vector |
|
|
260 make_absolute (const string_vector& sv) |
|
|
261 { |
|
|
262 int len = sv.length (); |
|
|
263 |
|
|
264 for (int i = 0; i < len; i++) |
|
|
265 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
|
|
266 |
|
|
267 return sv; |
|
|
268 } |
|
|
269 |
|
3195
|
270 DEFUN (file_in_loadpath, args, , |
|
3446
|
271 "-*- texinfo -*-\n\ |
|
4216
|
272 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
|
|
273 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ |
|
3195
|
274 \n\ |
|
4216
|
275 Return the absolute name name of @var{file} if it can be found in\n\ |
|
|
276 the list of directories specified by @code{LOADPATH}.\n\ |
|
|
277 If no file is found, return an empty matrix.\n\ |
|
|
278 \n\ |
|
4243
|
279 If the first argument is a cell array of of strings, search each\n\ |
|
|
280 directory of the loadpath for element of the cell array and return\n\ |
|
|
281 the first that matches.\n\ |
|
|
282 \n\ |
|
4216
|
283 If the second optional argument @code{\"all\"} is supplied, return\n\ |
|
|
284 a cell array containing the list of all files that have the same\n\ |
|
|
285 name in the path. If no files are found, return an empty cell array.\n\ |
|
3446
|
286 @end deftypefn\n\ |
|
|
287 @seealso{file_in_path}") |
|
3195
|
288 { |
|
4216
|
289 octave_value retval; |
|
3195
|
290 |
|
4243
|
291 int nargin = args.length (); |
|
3195
|
292 |
|
4243
|
293 if (nargin == 1 || nargin == 2) |
|
4216
|
294 { |
|
4243
|
295 string_vector names = args(0).all_strings (); |
|
|
296 |
|
|
297 if (! error_state && names.length () > 0) |
|
|
298 { |
|
|
299 if (nargin == 1) |
|
|
300 { |
|
|
301 std::string fname = octave_env::make_absolute |
|
|
302 (Vload_path_dir_path.find_first_of (names), |
|
|
303 octave_env::getcwd ()); |
|
|
304 |
|
|
305 if (fname.empty ()) |
|
|
306 retval = Matrix (); |
|
|
307 else |
|
|
308 retval = fname; |
|
|
309 } |
|
|
310 else if (nargin == 2) |
|
|
311 { |
|
|
312 std::string opt = args(1).string_value (); |
|
|
313 |
|
|
314 if (! error_state && opt == "all") |
|
|
315 retval = Cell (make_absolute (Vload_path_dir_path.find_all_first_of (names))); |
|
|
316 else |
|
|
317 print_usage ("file_in_loadpath: invalid option"); |
|
|
318 } |
|
|
319 } |
|
4216
|
320 else |
|
4243
|
321 error ("file_in_loadpath: expecting string as first argument"); |
|
4216
|
322 } |
|
3195
|
323 else |
|
|
324 print_usage ("file_in_loadpath"); |
|
|
325 |
|
|
326 return retval; |
|
|
327 } |
|
|
328 |
|
1957
|
329 DEFUN (file_in_path, args, , |
|
3301
|
330 "-*- texinfo -*-\n\ |
|
|
331 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
|
4216
|
332 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
|
3301
|
333 Return the absolute name name of @var{file} if it can be found in\n\ |
|
|
334 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
|
|
335 directories in the format described for the built-in variable\n\ |
|
4216
|
336 @code{LOADPATH}. If no file is found, return an empty matrix.\n\ |
|
3301
|
337 For example,\n\ |
|
|
338 \n\ |
|
|
339 @example\n\ |
|
|
340 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
|
|
341 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
|
|
342 @end example\n\ |
|
4216
|
343 \n\ |
|
4243
|
344 If the second argument is a cell array of of strings, search each\n\ |
|
|
345 directory of the path for element of the cell array and return\n\ |
|
|
346 the first that matches.\n\ |
|
|
347 \n\ |
|
4216
|
348 If the third optional argument @code{\"all\"} is supplied, return\n\ |
|
|
349 a cell array containing the list of all files that have the same\n\ |
|
|
350 name in the path. If no files are found, return an empty cell array.\n\ |
|
3301
|
351 @end deftypefn") |
|
686
|
352 { |
|
4216
|
353 octave_value retval; |
|
686
|
354 |
|
4243
|
355 int nargin = args.length (); |
|
1755
|
356 |
|
4243
|
357 if (nargin == 2 || nargin == 3) |
|
686
|
358 { |
|
4243
|
359 std::string path = args(0).string_value (); |
|
|
360 |
|
|
361 if (! error_state) |
|
|
362 { |
|
|
363 string_vector names = args(0).all_strings (); |
|
|
364 |
|
|
365 if (! error_state && names.length () > 0) |
|
|
366 { |
|
|
367 if (nargin == 2) |
|
|
368 { |
|
|
369 std::string fname = search_path_for_file (path, names); |
|
686
|
370 |
|
4243
|
371 if (fname.empty ()) |
|
|
372 retval = Matrix (); |
|
|
373 else |
|
|
374 retval = fname; |
|
|
375 } |
|
|
376 else if (nargin == 3) |
|
|
377 { |
|
|
378 std::string opt = args(1).string_value (); |
|
|
379 |
|
|
380 if (! error_state && opt == "all") |
|
|
381 retval = Cell (make_absolute (search_path_for_all_files (path, names))); |
|
|
382 else |
|
|
383 print_usage ("file_in_path: invalid option"); |
|
|
384 } |
|
|
385 } |
|
|
386 else |
|
|
387 error ("file_in_path: expecting string as second argument"); |
|
|
388 } |
|
1755
|
389 else |
|
4243
|
390 error ("file_in_path: expecting string as first argument"); |
|
686
|
391 } |
|
|
392 else |
|
|
393 print_usage ("file_in_path"); |
|
|
394 |
|
|
395 return retval; |
|
|
396 } |
|
|
397 |
|
3536
|
398 std::string |
|
3523
|
399 file_in_path (const std::string& name, const std::string& suffix) |
|
526
|
400 { |
|
3523
|
401 std::string nm = name; |
|
526
|
402 |
|
1755
|
403 if (! suffix.empty ()) |
|
|
404 nm.append (suffix); |
|
686
|
405 |
|
3174
|
406 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
|
|
407 octave_env::getcwd ()); |
|
526
|
408 } |
|
|
409 |
|
581
|
410 // See if there is an function file in the path. If so, return the |
|
|
411 // full path to the file. |
|
|
412 |
|
3536
|
413 std::string |
|
3523
|
414 fcn_file_in_path (const std::string& name) |
|
526
|
415 { |
|
3523
|
416 std::string retval; |
|
908
|
417 |
|
1755
|
418 int len = name.length (); |
|
|
419 |
|
|
420 if (len > 0) |
|
|
421 { |
|
|
422 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
423 retval = file_in_path (name, ""); |
|
908
|
424 else |
|
1755
|
425 retval = file_in_path (name, ".m"); |
|
908
|
426 } |
|
1755
|
427 |
|
|
428 return retval; |
|
526
|
429 } |
|
|
430 |
|
581
|
431 // See if there is an octave file in the path. If so, return the |
|
|
432 // full path to the file. |
|
|
433 |
|
3536
|
434 std::string |
|
3523
|
435 oct_file_in_path (const std::string& name) |
|
572
|
436 { |
|
3523
|
437 std::string retval; |
|
908
|
438 |
|
1755
|
439 int len = name.length (); |
|
|
440 |
|
|
441 if (len > 0) |
|
|
442 { |
|
|
443 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
|
908
|
444 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
1755
|
445 retval = file_in_path (name, ""); |
|
908
|
446 else |
|
1755
|
447 retval = file_in_path (name, ".oct"); |
|
908
|
448 } |
|
1755
|
449 |
|
|
450 return retval; |
|
572
|
451 } |
|
|
452 |
|
3103
|
453 // Replace backslash escapes in a string with the real values. |
|
|
454 |
|
3536
|
455 std::string |
|
3523
|
456 do_string_escapes (const std::string& s) |
|
3103
|
457 { |
|
3523
|
458 std::string retval; |
|
3103
|
459 |
|
|
460 size_t i = 0; |
|
|
461 size_t j = 0; |
|
|
462 size_t len = s.length (); |
|
|
463 |
|
|
464 retval.resize (len); |
|
|
465 |
|
|
466 while (j < len) |
|
|
467 { |
|
|
468 if (s[j] == '\\' && j+1 < len) |
|
|
469 { |
|
|
470 switch (s[++j]) |
|
|
471 { |
|
3893
|
472 case '0': |
|
|
473 retval[i] = '\0'; |
|
|
474 break; |
|
|
475 |
|
3103
|
476 case 'a': |
|
|
477 retval[i] = '\a'; |
|
|
478 break; |
|
|
479 |
|
|
480 case 'b': // backspace |
|
|
481 retval[i] = '\b'; |
|
|
482 break; |
|
|
483 |
|
|
484 case 'f': // formfeed |
|
|
485 retval[i] = '\f'; |
|
|
486 break; |
|
|
487 |
|
|
488 case 'n': // newline |
|
|
489 retval[i] = '\n'; |
|
|
490 break; |
|
|
491 |
|
|
492 case 'r': // carriage return |
|
|
493 retval[i] = '\r'; |
|
|
494 break; |
|
|
495 |
|
|
496 case 't': // horizontal tab |
|
|
497 retval[i] = '\t'; |
|
|
498 break; |
|
|
499 |
|
|
500 case 'v': // vertical tab |
|
|
501 retval[i] = '\v'; |
|
|
502 break; |
|
|
503 |
|
|
504 case '\\': // backslash |
|
|
505 retval[i] = '\\'; |
|
|
506 break; |
|
|
507 |
|
|
508 case '\'': // quote |
|
|
509 retval[i] = '\''; |
|
|
510 break; |
|
|
511 |
|
|
512 case '"': // double quote |
|
|
513 retval[i] = '"'; |
|
|
514 break; |
|
|
515 |
|
|
516 default: |
|
|
517 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
518 converting to `%c'", s[j], s[j]); |
|
|
519 retval[i] = s[j]; |
|
|
520 break; |
|
|
521 } |
|
|
522 } |
|
|
523 else |
|
|
524 { |
|
|
525 retval[i] = s[j]; |
|
|
526 } |
|
|
527 |
|
|
528 i++; |
|
|
529 j++; |
|
|
530 } |
|
|
531 |
|
3105
|
532 retval.resize (i); |
|
3103
|
533 |
|
|
534 return retval; |
|
|
535 } |
|
|
536 |
|
|
537 DEFUN (do_string_escapes, args, , |
|
3446
|
538 "-*- texinfo -*-\n\ |
|
|
539 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
|
|
540 Convert special characters in @var{string} to their escaped forms.\n\ |
|
|
541 @end deftypefn") |
|
3103
|
542 { |
|
|
543 octave_value retval; |
|
|
544 |
|
|
545 int nargin = args.length (); |
|
|
546 |
|
|
547 if (nargin == 1) |
|
|
548 { |
|
|
549 if (args(0).is_string ()) |
|
|
550 retval = do_string_escapes (args(0).string_value ()); |
|
|
551 else |
|
|
552 error ("do_string_escapes: argument must be a string"); |
|
|
553 } |
|
|
554 else |
|
|
555 print_usage ("do_string_escapes"); |
|
|
556 |
|
|
557 return retval; |
|
|
558 } |
|
|
559 |
|
1755
|
560 const char * |
|
801
|
561 undo_string_escape (char c) |
|
|
562 { |
|
|
563 if (! c) |
|
1755
|
564 return ""; |
|
801
|
565 |
|
|
566 switch (c) |
|
|
567 { |
|
3893
|
568 case '\0': |
|
|
569 return "\\0"; |
|
|
570 |
|
801
|
571 case '\a': |
|
|
572 return "\\a"; |
|
|
573 |
|
|
574 case '\b': // backspace |
|
|
575 return "\\b"; |
|
|
576 |
|
|
577 case '\f': // formfeed |
|
|
578 return "\\f"; |
|
|
579 |
|
|
580 case '\n': // newline |
|
|
581 return "\\n"; |
|
|
582 |
|
|
583 case '\r': // carriage return |
|
|
584 return "\\r"; |
|
|
585 |
|
|
586 case '\t': // horizontal tab |
|
|
587 return "\\t"; |
|
|
588 |
|
|
589 case '\v': // vertical tab |
|
|
590 return "\\v"; |
|
|
591 |
|
|
592 case '\\': // backslash |
|
|
593 return "\\\\"; |
|
|
594 |
|
|
595 case '"': // double quote |
|
|
596 return "\\\""; |
|
|
597 |
|
|
598 default: |
|
1755
|
599 { |
|
|
600 static char retval[2]; |
|
|
601 retval[0] = c; |
|
|
602 retval[1] = '\0'; |
|
|
603 return retval; |
|
|
604 } |
|
801
|
605 } |
|
|
606 } |
|
|
607 |
|
3536
|
608 std::string |
|
3523
|
609 undo_string_escapes (const std::string& s) |
|
801
|
610 { |
|
3523
|
611 std::string retval; |
|
801
|
612 |
|
1755
|
613 for (size_t i = 0; i < s.length (); i++) |
|
|
614 retval.append (undo_string_escape (s[i])); |
|
801
|
615 |
|
1755
|
616 return retval; |
|
801
|
617 } |
|
|
618 |
|
1957
|
619 DEFUN (undo_string_escapes, args, , |
|
3361
|
620 "-*- texinfo -*-\n\ |
|
|
621 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
622 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
623 example, the expression\n\ |
|
|
624 \n\ |
|
|
625 @example\n\ |
|
|
626 bell = \"\\a\";\n\ |
|
|
627 @end example\n\ |
|
|
628 \n\ |
|
|
629 @noindent\n\ |
|
|
630 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
631 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
632 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
633 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
634 able to print the original representation of the string, with the\n\ |
|
|
635 special characters replaced by their escape sequences. For example,\n\ |
|
|
636 \n\ |
|
|
637 @example\n\ |
|
|
638 octave:13> undo_string_escapes (bell)\n\ |
|
|
639 ans = \\a\n\ |
|
|
640 @end example\n\ |
|
|
641 \n\ |
|
|
642 @noindent\n\ |
|
|
643 replaces the unprintable alert character with its printable\n\ |
|
|
644 representation.\n\ |
|
|
645 @end deftypefn") |
|
801
|
646 { |
|
2086
|
647 octave_value retval; |
|
801
|
648 |
|
|
649 int nargin = args.length (); |
|
|
650 |
|
3103
|
651 if (nargin == 1) |
|
|
652 { |
|
|
653 if (args(0).is_string ()) |
|
|
654 retval = undo_string_escapes (args(0).string_value ()); |
|
|
655 else |
|
|
656 error ("undo_string_escapes: argument must be a string"); |
|
|
657 } |
|
801
|
658 else |
|
1023
|
659 print_usage ("undo_string_escapes"); |
|
801
|
660 |
|
|
661 return retval; |
|
|
662 } |
|
|
663 |
|
4243
|
664 DEFUN (find_first_of_in_loadpath, args, , "") |
|
|
665 { |
|
|
666 octave_value retval; |
|
|
667 |
|
|
668 if (args.length () == 1) |
|
|
669 { |
|
|
670 string_vector names = args(0).all_strings (); |
|
|
671 |
|
|
672 if (! error_state) |
|
|
673 retval = Vload_path_dir_path.find_all_first_of (names); |
|
|
674 } |
|
|
675 else |
|
|
676 print_usage ("find_first_of_in_loadpath"); |
|
|
677 |
|
|
678 return retval; |
|
|
679 } |
|
|
680 |
|
|
681 |
|
3879
|
682 // #if 0 |
|
3716
|
683 |
|
|
684 // Octave could use some way to access the value of ERRNO, but this is |
|
|
685 // probably not the best interface, so don't depend on it... |
|
|
686 |
|
|
687 DEFUN (ERRNO, args, , |
|
|
688 "-*- texinfo -*-\n\ |
|
|
689 @deftypefn {Built-in Function} {@var{system_error_number}} errno ()\n\ |
|
|
690 Return the current value of the system-dependent variable errno.\n\ |
|
|
691 @end deftypefn") |
|
|
692 { |
|
|
693 octave_value retval; |
|
|
694 |
|
|
695 if (args.length () == 0) |
|
|
696 retval = static_cast<double> (errno); |
|
|
697 else |
|
|
698 print_usage ("errno"); |
|
|
699 |
|
|
700 return retval; |
|
|
701 } |
|
|
702 |
|
3879
|
703 // #endif |
|
3716
|
704 |
|
2285
|
705 static void |
|
3523
|
706 warn_old_style_preference (bool val, const std::string& sval) |
|
2285
|
707 { |
|
|
708 warning |
|
|
709 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
710 sval.c_str (), (val ? 1 : 0)); |
|
|
711 } |
|
|
712 |
|
2204
|
713 // Check the value of a string variable to see if it it's ok to do |
|
|
714 // something. |
|
|
715 // |
|
|
716 // return of 1 => always ok. |
|
|
717 // return of 0 => never ok. |
|
|
718 // return of -1 => ok, but give me warning (default). |
|
|
719 |
|
|
720 int |
|
3523
|
721 check_preference (const std::string& var) |
|
2204
|
722 { |
|
|
723 int pref = -1; |
|
|
724 |
|
3523
|
725 std::string val = builtin_string_variable (var); |
|
2204
|
726 |
|
|
727 if (val.empty ()) |
|
|
728 { |
|
|
729 double dval = 0; |
|
|
730 if (builtin_real_scalar_variable (var, dval)) |
|
|
731 pref = NINT (dval); |
|
|
732 } |
|
|
733 else |
|
|
734 { |
|
3565
|
735 if (val == "yes" || val == "true") |
|
2285
|
736 { |
|
|
737 warn_old_style_preference (true, val); |
|
|
738 pref = 1; |
|
|
739 } |
|
3565
|
740 else if (val == "never" || val == "no" || val == "false") |
|
2285
|
741 { |
|
|
742 warn_old_style_preference (false, val); |
|
|
743 pref = 0; |
|
|
744 } |
|
2204
|
745 } |
|
|
746 |
|
|
747 return pref; |
|
|
748 } |
|
|
749 |
|
3354
|
750 static void |
|
|
751 check_dimensions (int& nr, int& nc, const char *warnfor) |
|
|
752 { |
|
|
753 if (nr < 0 || nc < 0) |
|
|
754 { |
|
|
755 if (Vtreat_neg_dim_as_zero) |
|
|
756 { |
|
|
757 nr = (nr < 0) ? 0 : nr; |
|
|
758 nc = (nc < 0) ? 0 : nc; |
|
|
759 |
|
|
760 if (Vtreat_neg_dim_as_zero < 0) |
|
|
761 warning ("%s: converting negative dimension to zero", |
|
|
762 warnfor); |
|
|
763 } |
|
|
764 else |
|
|
765 error ("%s: can't create a matrix with negative dimensions", |
|
|
766 warnfor); |
|
|
767 } |
|
|
768 } |
|
|
769 |
|
|
770 void |
|
|
771 get_dimensions (const octave_value& a, const char *warn_for, |
|
|
772 int& nr, int& nc) |
|
|
773 { |
|
|
774 if (a.is_scalar_type ()) |
|
|
775 { |
|
|
776 nr = nc = a.nint_value (); |
|
|
777 } |
|
|
778 else |
|
|
779 { |
|
|
780 nr = a.rows (); |
|
|
781 nc = a.columns (); |
|
|
782 |
|
|
783 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
784 { |
|
3419
|
785 Array<double> v = a.vector_value (); |
|
3354
|
786 |
|
|
787 if (error_state) |
|
|
788 return; |
|
|
789 |
|
|
790 nr = NINT (v (0)); |
|
|
791 nc = NINT (v (1)); |
|
|
792 } |
|
|
793 else |
|
|
794 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
|
795 } |
|
|
796 |
|
|
797 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
798 } |
|
|
799 |
|
|
800 void |
|
|
801 get_dimensions (const octave_value& a, const octave_value& b, |
|
|
802 const char *warn_for, int& nr, int& nc) |
|
|
803 { |
|
|
804 nr = a.is_empty () ? 0 : a.nint_value (); |
|
|
805 nc = b.is_empty () ? 0 : b.nint_value (); |
|
|
806 |
|
|
807 if (error_state) |
|
|
808 error ("%s: expecting two scalar arguments", warn_for); |
|
|
809 else |
|
|
810 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
811 } |
|
|
812 |
|
3620
|
813 extern int |
|
3622
|
814 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
815 { |
|
|
816 int retval = -1; |
|
|
817 |
|
|
818 va_list args; |
|
|
819 va_start (args, fmt); |
|
|
820 |
|
|
821 retval = octave_vformat (os, fmt, args); |
|
|
822 |
|
|
823 va_end (args); |
|
|
824 |
|
|
825 return retval; |
|
|
826 } |
|
|
827 |
|
|
828 extern int |
|
3622
|
829 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
830 { |
|
|
831 int retval = -1; |
|
|
832 |
|
3775
|
833 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
834 |
|
4135
|
835 std::streambuf *sb = os.rdbuf (); |
|
|
836 |
|
|
837 if (sb) |
|
|
838 retval = sb->vform (fmt, args); |
|
3620
|
839 |
|
|
840 #else |
|
|
841 |
|
|
842 char *s = octave_vsnprintf (fmt, args); |
|
|
843 |
|
|
844 if (s) |
|
|
845 { |
|
|
846 os << s; |
|
|
847 |
|
|
848 retval = strlen (s); |
|
|
849 } |
|
|
850 |
|
|
851 #endif |
|
|
852 |
|
|
853 return retval; |
|
|
854 } |
|
|
855 |
|
4086
|
856 void |
|
|
857 octave_sleep (double seconds) |
|
|
858 { |
|
|
859 if (seconds > 0) |
|
|
860 { |
|
|
861 double t; |
|
|
862 |
|
4093
|
863 unsigned int usec |
|
|
864 = static_cast <unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
865 |
|
4093
|
866 unsigned int sec |
|
|
867 = (t > UINT_MAX) ? UINT_MAX : static_cast <unsigned int> (t); |
|
4086
|
868 |
|
|
869 octave_sleep (sec); |
|
|
870 octave_usleep (usec); |
|
|
871 } |
|
|
872 } |
|
|
873 |
|
3354
|
874 static int |
|
|
875 treat_neg_dim_as_zero (void) |
|
|
876 { |
|
|
877 Vtreat_neg_dim_as_zero = check_preference ("treat_neg_dim_as_zero"); |
|
|
878 |
|
|
879 return 0; |
|
|
880 } |
|
|
881 |
|
|
882 void |
|
|
883 symbols_of_utils (void) |
|
|
884 { |
|
4233
|
885 DEFVAR (treat_neg_dim_as_zero, false, treat_neg_dim_as_zero, |
|
3369
|
886 "-*- texinfo -*-\n\ |
|
|
887 @defvr {Built-in Variable} treat_neg_dim_as_zero\n\ |
|
|
888 If the value of @code{treat_neg_dim_as_zero} is nonzero, expressions\n\ |
|
|
889 like\n\ |
|
|
890 \n\ |
|
|
891 @example\n\ |
|
|
892 eye (-1)\n\ |
|
|
893 @end example\n\ |
|
|
894 \n\ |
|
|
895 @noindent\n\ |
|
|
896 produce an empty matrix (i.e., row and column dimensions are zero).\n\ |
|
|
897 Otherwise, an error message is printed and control is returned to the\n\ |
|
|
898 top level. The default value is 0.\n\ |
|
|
899 @end defvr"); |
|
3354
|
900 } |
|
|
901 |
|
572
|
902 /* |
|
1
|
903 ;;; Local Variables: *** |
|
|
904 ;;; mode: C++ *** |
|
|
905 ;;; End: *** |
|
|
906 */ |
