compat/fnmatch: update old-style definition to ANSI
[git/git.git] / compat / fnmatch / fnmatch.c
1 /* Copyright (C) 1991, 92, 93, 96, 97, 98, 99 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with this library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
18
19 #if HAVE_CONFIG_H
20 # include <config.h>
21 #endif
22
23 /* Enable GNU extensions in fnmatch.h. */
24 #ifndef _GNU_SOURCE
25 # define _GNU_SOURCE 1
26 #endif
27
28 #include <errno.h>
29 #include <fnmatch.h>
30 #include <ctype.h>
31
32 #if HAVE_STRING_H || defined _LIBC
33 # include <string.h>
34 #else
35 # include <strings.h>
36 #endif
37
38 #if defined STDC_HEADERS || defined _LIBC
39 # include <stdlib.h>
40 #endif
41
42 /* For platforms which support the ISO C amendment 1 functionality we
43 support user defined character classes. */
44 #if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
45 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
46 # include <wchar.h>
47 # include <wctype.h>
48 #endif
49
50 /* Comment out all this code if we are using the GNU C Library, and are not
51 actually compiling the library itself. This code is part of the GNU C
52 Library, but also included in many other GNU distributions. Compiling
53 and linking in this code is a waste when using the GNU C library
54 (especially if it is a shared library). Rather than having every GNU
55 program understand `configure --with-gnu-libc' and omit the object files,
56 it is simpler to just do this in the source for each such file. */
57
58 #if defined _LIBC || !defined __GNU_LIBRARY__
59
60
61 # if defined STDC_HEADERS || !defined isascii
62 # define ISASCII(c) 1
63 # else
64 # define ISASCII(c) isascii(c)
65 # endif
66
67 # ifdef isblank
68 # define ISBLANK(c) (ISASCII (c) && isblank (c))
69 # else
70 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
71 # endif
72 # ifdef isgraph
73 # define ISGRAPH(c) (ISASCII (c) && isgraph (c))
74 # else
75 # define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
76 # endif
77
78 # define ISPRINT(c) (ISASCII (c) && isprint (c))
79 # define ISDIGIT(c) (ISASCII (c) && isdigit (c))
80 # define ISALNUM(c) (ISASCII (c) && isalnum (c))
81 # define ISALPHA(c) (ISASCII (c) && isalpha (c))
82 # define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
83 # define ISLOWER(c) (ISASCII (c) && islower (c))
84 # define ISPUNCT(c) (ISASCII (c) && ispunct (c))
85 # define ISSPACE(c) (ISASCII (c) && isspace (c))
86 # define ISUPPER(c) (ISASCII (c) && isupper (c))
87 # define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
88
89 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
90
91 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
92 /* The GNU C library provides support for user-defined character classes
93 and the functions from ISO C amendment 1. */
94 # ifdef CHARCLASS_NAME_MAX
95 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
96 # else
97 /* This shouldn't happen but some implementation might still have this
98 problem. Use a reasonable default value. */
99 # define CHAR_CLASS_MAX_LENGTH 256
100 # endif
101
102 # ifdef _LIBC
103 # define IS_CHAR_CLASS(string) __wctype (string)
104 # else
105 # define IS_CHAR_CLASS(string) wctype (string)
106 # endif
107 # else
108 # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
109
110 # define IS_CHAR_CLASS(string) \
111 (STREQ (string, "alpha") || STREQ (string, "upper") \
112 || STREQ (string, "lower") || STREQ (string, "digit") \
113 || STREQ (string, "alnum") || STREQ (string, "xdigit") \
114 || STREQ (string, "space") || STREQ (string, "print") \
115 || STREQ (string, "punct") || STREQ (string, "graph") \
116 || STREQ (string, "cntrl") || STREQ (string, "blank"))
117 # endif
118
119 /* Avoid depending on library functions or files
120 whose names are inconsistent. */
121
122 # if !defined _LIBC && !defined getenv
123 extern char *getenv ();
124 # endif
125
126 # ifndef errno
127 extern int errno;
128 # endif
129
130 # ifndef NULL
131 # define NULL 0
132 # endif
133
134 /* This function doesn't exist on most systems. */
135
136 # if !defined HAVE___STRCHRNUL && !defined _LIBC
137 static char *
138 __strchrnul (const char *s, int c)
139
140
141 {
142 char *result = strchr (s, c);
143 if (result == NULL)
144 result = strchr (s, '\0');
145 return result;
146 }
147 # endif
148
149 # ifndef internal_function
150 /* Inside GNU libc we mark some function in a special way. In other
151 environments simply ignore the marking. */
152 # define internal_function
153 # endif
154
155 /* Match STRING against the filename pattern PATTERN, returning zero if
156 it matches, nonzero if not. */
157 static int internal_fnmatch __P ((const char *pattern, const char *string,
158 int no_leading_period, int flags))
159 internal_function;
160 static int
161 internal_function
162 internal_fnmatch (const char *pattern, const char *string, int no_leading_period, int flags)
163
164
165
166
167 {
168 register const char *p = pattern, *n = string;
169 register unsigned char c;
170
171 /* Note that this evaluates C many times. */
172 # ifdef _LIBC
173 # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
174 # else
175 # define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
176 # endif
177
178 while ((c = *p++) != '\0')
179 {
180 c = FOLD (c);
181
182 switch (c)
183 {
184 case '?':
185 if (*n == '\0')
186 return FNM_NOMATCH;
187 else if (*n == '/' && (flags & FNM_FILE_NAME))
188 return FNM_NOMATCH;
189 else if (*n == '.' && no_leading_period
190 && (n == string
191 || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
192 return FNM_NOMATCH;
193 break;
194
195 case '\\':
196 if (!(flags & FNM_NOESCAPE))
197 {
198 c = *p++;
199 if (c == '\0')
200 /* Trailing \ loses. */
201 return FNM_NOMATCH;
202 c = FOLD (c);
203 }
204 if (FOLD ((unsigned char) *n) != c)
205 return FNM_NOMATCH;
206 break;
207
208 case '*':
209 if (*n == '.' && no_leading_period
210 && (n == string
211 || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
212 return FNM_NOMATCH;
213
214 for (c = *p++; c == '?' || c == '*'; c = *p++)
215 {
216 if (*n == '/' && (flags & FNM_FILE_NAME))
217 /* A slash does not match a wildcard under FNM_FILE_NAME. */
218 return FNM_NOMATCH;
219 else if (c == '?')
220 {
221 /* A ? needs to match one character. */
222 if (*n == '\0')
223 /* There isn't another character; no match. */
224 return FNM_NOMATCH;
225 else
226 /* One character of the string is consumed in matching
227 this ? wildcard, so *??? won't match if there are
228 less than three characters. */
229 ++n;
230 }
231 }
232
233 if (c == '\0')
234 /* The wildcard(s) is/are the last element of the pattern.
235 If the name is a file name and contains another slash
236 this does mean it cannot match. */
237 return ((flags & FNM_FILE_NAME) && strchr (n, '/') != NULL
238 ? FNM_NOMATCH : 0);
239 else
240 {
241 const char *endp;
242
243 endp = __strchrnul (n, (flags & FNM_FILE_NAME) ? '/' : '\0');
244
245 if (c == '[')
246 {
247 int flags2 = ((flags & FNM_FILE_NAME)
248 ? flags : (flags & ~FNM_PERIOD));
249
250 for (--p; n < endp; ++n)
251 if (internal_fnmatch (p, n,
252 (no_leading_period
253 && (n == string
254 || (n[-1] == '/'
255 && (flags
256 & FNM_FILE_NAME)))),
257 flags2)
258 == 0)
259 return 0;
260 }
261 else if (c == '/' && (flags & FNM_FILE_NAME))
262 {
263 while (*n != '\0' && *n != '/')
264 ++n;
265 if (*n == '/'
266 && (internal_fnmatch (p, n + 1, flags & FNM_PERIOD,
267 flags) == 0))
268 return 0;
269 }
270 else
271 {
272 int flags2 = ((flags & FNM_FILE_NAME)
273 ? flags : (flags & ~FNM_PERIOD));
274
275 if (c == '\\' && !(flags & FNM_NOESCAPE))
276 c = *p;
277 c = FOLD (c);
278 for (--p; n < endp; ++n)
279 if (FOLD ((unsigned char) *n) == c
280 && (internal_fnmatch (p, n,
281 (no_leading_period
282 && (n == string
283 || (n[-1] == '/'
284 && (flags
285 & FNM_FILE_NAME)))),
286 flags2) == 0))
287 return 0;
288 }
289 }
290
291 /* If we come here no match is possible with the wildcard. */
292 return FNM_NOMATCH;
293
294 case '[':
295 {
296 /* Nonzero if the sense of the character class is inverted. */
297 static int posixly_correct;
298 register int not;
299 char cold;
300
301 if (posixly_correct == 0)
302 posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
303
304 if (*n == '\0')
305 return FNM_NOMATCH;
306
307 if (*n == '.' && no_leading_period && (n == string
308 || (n[-1] == '/'
309 && (flags
310 & FNM_FILE_NAME))))
311 return FNM_NOMATCH;
312
313 if (*n == '/' && (flags & FNM_FILE_NAME))
314 /* `/' cannot be matched. */
315 return FNM_NOMATCH;
316
317 not = (*p == '!' || (posixly_correct < 0 && *p == '^'));
318 if (not)
319 ++p;
320
321 c = *p++;
322 for (;;)
323 {
324 unsigned char fn = FOLD ((unsigned char) *n);
325
326 if (!(flags & FNM_NOESCAPE) && c == '\\')
327 {
328 if (*p == '\0')
329 return FNM_NOMATCH;
330 c = FOLD ((unsigned char) *p);
331 ++p;
332
333 if (c == fn)
334 goto matched;
335 }
336 else if (c == '[' && *p == ':')
337 {
338 /* Leave room for the null. */
339 char str[CHAR_CLASS_MAX_LENGTH + 1];
340 size_t c1 = 0;
341 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
342 wctype_t wt;
343 # endif
344 const char *startp = p;
345
346 for (;;)
347 {
348 if (c1 > CHAR_CLASS_MAX_LENGTH)
349 /* The name is too long and therefore the pattern
350 is ill-formed. */
351 return FNM_NOMATCH;
352
353 c = *++p;
354 if (c == ':' && p[1] == ']')
355 {
356 p += 2;
357 break;
358 }
359 if (c < 'a' || c >= 'z')
360 {
361 /* This cannot possibly be a character class name.
362 Match it as a normal range. */
363 p = startp;
364 c = '[';
365 goto normal_bracket;
366 }
367 str[c1++] = c;
368 }
369 str[c1] = '\0';
370
371 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
372 wt = IS_CHAR_CLASS (str);
373 if (wt == 0)
374 /* Invalid character class name. */
375 return FNM_NOMATCH;
376
377 if (__iswctype (__btowc ((unsigned char) *n), wt))
378 goto matched;
379 # else
380 if ((STREQ (str, "alnum") && ISALNUM ((unsigned char) *n))
381 || (STREQ (str, "alpha") && ISALPHA ((unsigned char) *n))
382 || (STREQ (str, "blank") && ISBLANK ((unsigned char) *n))
383 || (STREQ (str, "cntrl") && ISCNTRL ((unsigned char) *n))
384 || (STREQ (str, "digit") && ISDIGIT ((unsigned char) *n))
385 || (STREQ (str, "graph") && ISGRAPH ((unsigned char) *n))
386 || (STREQ (str, "lower") && ISLOWER ((unsigned char) *n))
387 || (STREQ (str, "print") && ISPRINT ((unsigned char) *n))
388 || (STREQ (str, "punct") && ISPUNCT ((unsigned char) *n))
389 || (STREQ (str, "space") && ISSPACE ((unsigned char) *n))
390 || (STREQ (str, "upper") && ISUPPER ((unsigned char) *n))
391 || (STREQ (str, "xdigit") && ISXDIGIT ((unsigned char) *n)))
392 goto matched;
393 # endif
394 }
395 else if (c == '\0')
396 /* [ (unterminated) loses. */
397 return FNM_NOMATCH;
398 else
399 {
400 normal_bracket:
401 if (FOLD (c) == fn)
402 goto matched;
403
404 cold = c;
405 c = *p++;
406
407 if (c == '-' && *p != ']')
408 {
409 /* It is a range. */
410 unsigned char cend = *p++;
411 if (!(flags & FNM_NOESCAPE) && cend == '\\')
412 cend = *p++;
413 if (cend == '\0')
414 return FNM_NOMATCH;
415
416 if (cold <= fn && fn <= FOLD (cend))
417 goto matched;
418
419 c = *p++;
420 }
421 }
422
423 if (c == ']')
424 break;
425 }
426
427 if (!not)
428 return FNM_NOMATCH;
429 break;
430
431 matched:
432 /* Skip the rest of the [...] that already matched. */
433 while (c != ']')
434 {
435 if (c == '\0')
436 /* [... (unterminated) loses. */
437 return FNM_NOMATCH;
438
439 c = *p++;
440 if (!(flags & FNM_NOESCAPE) && c == '\\')
441 {
442 if (*p == '\0')
443 return FNM_NOMATCH;
444 /* XXX 1003.2d11 is unclear if this is right. */
445 ++p;
446 }
447 else if (c == '[' && *p == ':')
448 {
449 do
450 if (*++p == '\0')
451 return FNM_NOMATCH;
452 while (*p != ':' || p[1] == ']');
453 p += 2;
454 c = *p;
455 }
456 }
457 if (not)
458 return FNM_NOMATCH;
459 }
460 break;
461
462 default:
463 if (c != FOLD ((unsigned char) *n))
464 return FNM_NOMATCH;
465 }
466
467 ++n;
468 }
469
470 if (*n == '\0')
471 return 0;
472
473 if ((flags & FNM_LEADING_DIR) && *n == '/')
474 /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */
475 return 0;
476
477 return FNM_NOMATCH;
478
479 # undef FOLD
480 }
481
482
483 int
484 fnmatch (const char *pattern, const char *string, int flags)
485
486
487
488 {
489 return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
490 }
491
492 #endif /* _LIBC or not __GNU_LIBRARY__. */