1 /* Copyright (C) 1991, 1992, 1993, 1996, 1997, 1998, 1999 Free Software
2 Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public License
16 along with this library; see the file COPYING.LIB. If not, write to the Free
17 Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
18 USA. */
19
20 #if HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23
24 /* Enable GNU extensions in fnmatch.h. */
25 #ifndef _GNU_SOURCE
26 # define _GNU_SOURCE 1
27 #endif
28
29 #include <errno.h>
30 #include <fnmatch.h>
31 #include <ctype.h>
32
33 #if HAVE_STRING_H || defined _LIBC
34 # include <string.h>
35 #else
36 # include <strings.h>
37 #endif
38
39 #if defined STDC_HEADERS || defined _LIBC
40 # include <stdlib.h>
41 #endif
42
43 /* For platform which support the ISO C amendement 1 functionality we
44 support user defined character classes. */
45 #if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
46 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
47 # include <wchar.h>
48 # include <wctype.h>
49 #endif
50
51 /* Comment out all this code if we are using the GNU C Library, and are not
52 actually compiling the library itself. This code is part of the GNU C
53 Library, but also included in many other GNU distributions. Compiling
54 and linking in this code is a waste when using the GNU C library
55 (especially if it is a shared library). Rather than having every GNU
56 program understand `configure --with-gnu-libc' and omit the object files,
57 it is simpler to just do this in the source for each such file. */
58
59 #if defined _LIBC || !defined __GNU_LIBRARY__
60
61
62 # if defined STDC_HEADERS || !defined isascii
63 # define ISASCII(c) 1
64 # else
65 # define ISASCII(c) isascii(c)
66 # endif
67
68 # ifdef isblank
69 # define ISBLANK(c) (ISASCII (c) && isblank (c))
70 # else
71 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
72 # endif
73 # ifdef isgraph
74 # define ISGRAPH(c) (ISASCII (c) && isgraph (c))
75 # else
76 # define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
77 # endif
78
79 # define ISPRINT(c) (ISASCII (c) && isprint (c))
80 # define ISDIGIT(c) (ISASCII (c) && isdigit (c))
81 # define ISALNUM(c) (ISASCII (c) && isalnum (c))
82 # define ISALPHA(c) (ISASCII (c) && isalpha (c))
83 # define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
84 # define ISLOWER(c) (ISASCII (c) && islower (c))
85 # define ISPUNCT(c) (ISASCII (c) && ispunct (c))
86 # define ISSPACE(c) (ISASCII (c) && isspace (c))
87 # define ISUPPER(c) (ISASCII (c) && isupper (c))
88 # define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
89
90 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
91
92 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
93 /* The GNU C library provides support for user-defined character classes
94 and the functions from ISO C amendement 1. */
95 # ifdef CHARCLASS_NAME_MAX
96 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
97 # else
98 /* This shouldn't happen but some implementation might still have this
99 problem. Use a reasonable default value. */
100 # define CHAR_CLASS_MAX_LENGTH 256
101 # endif
102
103 # ifdef _LIBC
104 # define IS_CHAR_CLASS(string) __wctype (string)
105 # else
106 # define IS_CHAR_CLASS(string) wctype (string)
107 # endif
108 # else
109 # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
110
111 # define IS_CHAR_CLASS(string) \
112 (STREQ (string, "alpha") || STREQ (string, "upper") \
113 || STREQ (string, "lower") || STREQ (string, "digit") \
114 || STREQ (string, "alnum") || STREQ (string, "xdigit") \
115 || STREQ (string, "space") || STREQ (string, "print") \
116 || STREQ (string, "punct") || STREQ (string, "graph") \
117 || STREQ (string, "cntrl") || STREQ (string, "blank"))
118 # endif
119
120 /* Avoid depending on library functions or files
121 whose names are inconsistent. */
122
123 # if !defined _LIBC && !defined getenv
124 extern char *getenv ();
125 # endif
126
127 # ifndef errno
128 extern int errno;
129 # endif
130
131 /* This function doesn't exist on most systems. */
132
133 # if !defined HAVE___STRCHRNUL && !defined _LIBC
134 static char *
135 __strchrnul (s, c)
136 const char *s;
137 int c;
138 {
139 char *result = strchr (s, c);
140 if (result == NULL)
141 result = strchr (s, '\0');
142 return result;
143 }
144 # endif
145
146 # ifndef internal_function
147 /* Inside GNU libc we mark some function in a special way. In other
148 environments simply ignore the marking. */
149 # define internal_function
150 # endif
151
152 /* Match STRING against the filename pattern PATTERN, returning zero if
153 it matches, nonzero if not. */
154 static int internal_fnmatch __P ((const char *pattern, const char *string,
155 int no_leading_period, int flags))
156 internal_function;
157 static int
158 internal_function
159 internal_fnmatch (pattern, string, no_leading_period, flags)
160 const char *pattern;
161 const char *string;
162 int no_leading_period;
163 int flags;
164 {
165 register const char *p = pattern, *n = string;
166 register unsigned char c;
167
168 /* Note that this evaluates C many times. */
169 # ifdef _LIBC
170 # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
171 # else
172 # define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
173 # endif
174
175 while ((c = *p++) != '\0')
176 {
177 c = FOLD (c);
178
179 switch (c)
180 {
181 case '?':
182 if (*n == '\0')
183 return FNM_NOMATCH;
184 else if (*n == '/' && (flags & FNM_FILE_NAME))
185 return FNM_NOMATCH;
186 else if (*n == '.' && no_leading_period
187 && (n == string
188 || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
189 return FNM_NOMATCH;
190 break;
191
192 case '\\':
193 if (!(flags & FNM_NOESCAPE))
194 {
195 c = *p++;
196 if (c == '\0')
197 /* Trailing \ loses. */
198 return FNM_NOMATCH;
199 c = FOLD (c);
200 }
201 if (FOLD ((unsigned char) *n) != c)
202 return FNM_NOMATCH;
203 break;
204
205 case '*':
206 if (*n == '.' && no_leading_period
207 && (n == string
208 || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
209 return FNM_NOMATCH;
210
211 for (c = *p++; c == '?' || c == '*'; c = *p++)
212 {
213 if (*n == '/' && (flags & FNM_FILE_NAME))
214 /* A slash does not match a wildcard under FNM_FILE_NAME. */
215 return FNM_NOMATCH;
216 else if (c == '?')
217 {
218 /* A ? needs to match one character. */
219 if (*n == '\0')
220 /* There isn't another character; no match. */
221 return FNM_NOMATCH;
222 else
223 /* One character of the string is consumed in matching
224 this ? wildcard, so *??? won't match if there are
225 less than three characters. */
226 ++n;
227 }
228 }
229
230 if (c == '\0')
231 /* The wildcard(s) is/are the last element of the pattern.
232 If the name is a file name and contains another slash
233 this does mean it cannot match. */
234 return ((flags & FNM_FILE_NAME) && strchr (n, '/') != NULL
235 ? FNM_NOMATCH : 0);
236 else
237 {
238 const char *endp;
239
240 endp = __strchrnul (n, (flags & FNM_FILE_NAME) ? '/' : '\0');
241
242 if (c == '[')
243 {
244 int flags2 = ((flags & FNM_FILE_NAME)
245 ? flags : (flags & ~FNM_PERIOD));
246
247 for (--p; n < endp; ++n)
248 if (internal_fnmatch (p, n,
249 (no_leading_period
250 && (n == string
251 || (n[-1] == '/'
252 && (flags
253 & FNM_FILE_NAME)))),
254 flags2)
255 == 0)
256 return 0;
257 }
258 else if (c == '/' && (flags & FNM_FILE_NAME))
259 {
260 while (*n != '\0' && *n != '/')
261 ++n;
262 if (*n == '/'
263 && (internal_fnmatch (p, n + 1, flags & FNM_PERIOD,
264 flags) == 0))
265 return 0;
266 }
267 else
268 {
269 int flags2 = ((flags & FNM_FILE_NAME)
270 ? flags : (flags & ~FNM_PERIOD));
271
272 if (c == '\\' && !(flags & FNM_NOESCAPE))
273 c = *p;
274 c = FOLD (c);
275 for (--p; n < endp; ++n)
276 if (FOLD ((unsigned char) *n) == c
277 && (internal_fnmatch (p, n,
278 (no_leading_period
279 && (n == string
280 || (n[-1] == '/'
281 && (flags
282 & FNM_FILE_NAME)))),
283 flags2) == 0))
284 return 0;
285 }
286 }
287
288 /* If we come here no match is possible with the wildcard. */
289 return FNM_NOMATCH;
290
291 case '[':
292 {
293 /* Nonzero if the sense of the character class is inverted. */
294 static int posixly_correct;
295 register int not;
296 char cold;
297
298 if (posixly_correct == 0)
299 posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
300
301 if (*n == '\0')
302 return FNM_NOMATCH;
303
304 if (*n == '.' && no_leading_period && (n == string
305 || (n[-1] == '/'
306 && (flags
307 & FNM_FILE_NAME))))
308 return FNM_NOMATCH;
309
310 if (*n == '/' && (flags & FNM_FILE_NAME))
311 /* `/' cannot be matched. */
312 return FNM_NOMATCH;
313
314 not = (*p == '!' || (posixly_correct < 0 && *p == '^'));
315 if (not)
316 ++p;
317
318 c = *p++;
319 for (;;)
320 {
321 unsigned char fn = FOLD ((unsigned char) *n);
322
323 if (!(flags & FNM_NOESCAPE) && c == '\\')
324 {
325 if (*p == '\0')
326 return FNM_NOMATCH;
327 c = FOLD ((unsigned char) *p);
328 ++p;
329
330 if (c == fn)
331 goto matched;
332 }
333 else if (c == '[' && *p == ':')
334 {
335 /* Leave room for the null. */
336 char str[CHAR_CLASS_MAX_LENGTH + 1];
337 size_t c1 = 0;
338 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
339 wctype_t wt;
340 # endif
341 const char *startp = p;
342
343 for (;;)
344 {
345 if (c1 == CHAR_CLASS_MAX_LENGTH)
346 /* The name is too long and therefore the pattern
347 is ill-formed. */
348 return FNM_NOMATCH;
349
350 c = *++p;
351 if (c == ':' && p[1] == ']')
352 {
353 p += 2;
354 break;
355 }
356 if (c < 'a' || c >= 'z')
357 {
358 /* This cannot possibly be a character class name.
359 Match it as a normal range. */
360 p = startp;
361 c = '[';
362 goto normal_bracket;
363 }
364 str[c1++] = c;
365 }
366 str[c1] = '\0';
367
368 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
369 wt = IS_CHAR_CLASS (str);
370 if (wt == 0)
371 /* Invalid character class name. */
372 return FNM_NOMATCH;
373
374 if (__iswctype (__btowc ((unsigned char) *n), wt))
375 goto matched;
376 # else
377 if ((STREQ (str, "alnum") && ISALNUM ((unsigned char) *n))
378 || (STREQ (str, "alpha") && ISALPHA ((unsigned char) *n))
379 || (STREQ (str, "blank") && ISBLANK ((unsigned char) *n))
380 || (STREQ (str, "cntrl") && ISCNTRL ((unsigned char) *n))
381 || (STREQ (str, "digit") && ISDIGIT ((unsigned char) *n))
382 || (STREQ (str, "graph") && ISGRAPH ((unsigned char) *n))
383 || (STREQ (str, "lower") && ISLOWER ((unsigned char) *n))
384 || (STREQ (str, "print") && ISPRINT ((unsigned char) *n))
385 || (STREQ (str, "punct") && ISPUNCT ((unsigned char) *n))
386 || (STREQ (str, "space") && ISSPACE ((unsigned char) *n))
387 || (STREQ (str, "upper") && ISUPPER ((unsigned char) *n))
388 || (STREQ (str, "xdigit") && ISXDIGIT ((unsigned char) *n)))
389 goto matched;
390 # endif
391 }
392 else if (c == '\0')
393 /* [ (unterminated) loses. */
394 return FNM_NOMATCH;
395 else
396 {
397 normal_bracket:
398 if (FOLD (c) == fn)
399 goto matched;
400
401 cold = c;
402 c = *p++;
403
404 if (c == '-' && *p != ']')
405 {
406 /* It is a range. */
407 unsigned char cend = *p++;
408 if (!(flags & FNM_NOESCAPE) && cend == '\\')
409 cend = *p++;
410 if (cend == '\0')
411 return FNM_NOMATCH;
412
413 if (cold <= fn && fn <= FOLD (cend))
414 goto matched;
415
416 c = *p++;
417 }
418 }
419
420 if (c == ']')
421 break;
422 }
423
424 if (!not)
425 return FNM_NOMATCH;
426 break;
427
428 matched:
429 /* Skip the rest of the [...] that already matched. */
430 while (c != ']')
431 {
432 if (c == '\0')
433 /* [... (unterminated) loses. */
434 return FNM_NOMATCH;
435
436 c = *p++;
437 if (!(flags & FNM_NOESCAPE) && c == '\\')
438 {
439 if (*p == '\0')
440 return FNM_NOMATCH;
441 /* XXX 1003.2d11 is unclear if this is right. */
442 ++p;
443 }
444 else if (c == '[' && *p == ':')
445 {
446 do
447 if (*++p == '\0')
448 return FNM_NOMATCH;
449 while (*p != ':' || p[1] == ']');
450 p += 2;
451 c = *p;
452 }
453 }
454 if (not)
455 return FNM_NOMATCH;
456 }
457 break;
458
459 default:
460 if (c != FOLD ((unsigned char) *n))
461 return FNM_NOMATCH;
462 }
463
464 ++n;
465 }
466
467 if (*n == '\0')
468 return 0;
469
470 if ((flags & FNM_LEADING_DIR) && *n == '/')
471 /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */
472 return 0;
473
474 return FNM_NOMATCH;
475
476 # undef FOLD
477 }
478
479
480 int
481 fnmatch (pattern, string, flags)
482 const char *pattern;
483 const char *string;
484 int flags;
485 {
486 return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
487 }
488
489 #endif /* _LIBC or not __GNU_LIBRARY__. */