1/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C 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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#if HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22/* Enable GNU extensions in fnmatch.h. */
23#ifndef _GNU_SOURCE
24# define _GNU_SOURCE 1
25#endif
26
27#include <assert.h>
28#include <errno.h>
29#include <fnmatch.h>
30#include <ctype.h>
31#include <string.h>
32
33#if defined STDC_HEADERS || defined _LIBC
34# include <stdlib.h>
35#endif
36
37#ifdef _LIBC
38# include <alloca.h>
39#else
40# define alloca_account(size., var) alloca (size)
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/* We need some of the locale data (the collation sequence information)
52 but there is no interface to get this information in general. Therefore
53 we support a correct implementation only in glibc. */
54#ifdef _LIBC
55# include "../locale/localeinfo.h"
56# include "../locale/elem-hash.h"
57# include "../locale/coll-lookup.h"
58# include <shlib-compat.h>
59
60# define CONCAT(a,b) __CONCAT(a,b)
61# define mbsrtowcs __mbsrtowcs
62# define fnmatch __fnmatch
63extern int fnmatch (const char *pattern, const char *string, int flags);
64#endif
65
66/* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
67#define NO_LEADING_PERIOD(flags) \
68 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
69
70/* Comment out all this code if we are using the GNU C Library, and are not
71 actually compiling the library itself. This code is part of the GNU C
72 Library, but also included in many other GNU distributions. Compiling
73 and linking in this code is a waste when using the GNU C library
74 (especially if it is a shared library). Rather than having every GNU
75 program understand `configure --with-gnu-libc' and omit the object files,
76 it is simpler to just do this in the source for each such file. */
77
78#if defined _LIBC || !defined __GNU_LIBRARY__
79
80
81# if defined STDC_HEADERS || !defined isascii
82# define ISASCII(c) 1
83# else
84# define ISASCII(c) isascii(c)
85# endif
86
87# ifdef isblank
88# define ISBLANK(c) (ISASCII (c) && isblank (c))
89# else
90# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
91# endif
92# ifdef isgraph
93# define ISGRAPH(c) (ISASCII (c) && isgraph (c))
94# else
95# define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
96# endif
97
98# define ISPRINT(c) (ISASCII (c) && isprint (c))
99# define ISDIGIT(c) (ISASCII (c) && isdigit (c))
100# define ISALNUM(c) (ISASCII (c) && isalnum (c))
101# define ISALPHA(c) (ISASCII (c) && isalpha (c))
102# define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
103# define ISLOWER(c) (ISASCII (c) && islower (c))
104# define ISPUNCT(c) (ISASCII (c) && ispunct (c))
105# define ISSPACE(c) (ISASCII (c) && isspace (c))
106# define ISUPPER(c) (ISASCII (c) && isupper (c))
107# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
108
109# define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
110
111# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
112/* The GNU C library provides support for user-defined character classes
113 and the functions from ISO C amendement 1. */
114# ifdef CHARCLASS_NAME_MAX
115# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
116# else
117/* This shouldn't happen but some implementation might still have this
118 problem. Use a reasonable default value. */
119# define CHAR_CLASS_MAX_LENGTH 256
120# endif
121
122# ifdef _LIBC
123# define IS_CHAR_CLASS(string) __wctype (string)
124# else
125# define IS_CHAR_CLASS(string) wctype (string)
126# endif
127
128# ifdef _LIBC
129# define ISWCTYPE(WC, WT) __iswctype (WC, WT)
130# else
131# define ISWCTYPE(WC, WT) iswctype (WC, WT)
132# endif
133
134# if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
135/* In this case we are implementing the multibyte character handling. */
136# define HANDLE_MULTIBYTE 1
137# endif
138
139# else
140# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
141
142# define IS_CHAR_CLASS(string) \
143 (STREQ (string, "alpha") || STREQ (string, "upper") \
144 || STREQ (string, "lower") || STREQ (string, "digit") \
145 || STREQ (string, "alnum") || STREQ (string, "xdigit") \
146 || STREQ (string, "space") || STREQ (string, "print") \
147 || STREQ (string, "punct") || STREQ (string, "graph") \
148 || STREQ (string, "cntrl") || STREQ (string, "blank"))
149# endif
150
151/* Avoid depending on library functions or files
152 whose names are inconsistent. */
153
154# if !defined _LIBC && !defined getenv
155extern char *getenv ();
156# endif
157
158# ifndef errno
159extern int errno;
160# endif
161
162/* Global variable. */
163static int posixly_correct;
164
165/* This function doesn't exist on most systems. */
166
167# if !defined HAVE___STRCHRNUL && !defined _LIBC
168static char *
169__strchrnul (const char *s, int c)
170{
171 char *result = strchr (s, c);
172 if (result == NULL)
173 result = strchr (s, '\0');
174 return result;
175}
176# endif
177
178# if HANDLE_MULTIBYTE && !defined HAVE___STRCHRNUL && !defined _LIBC
179static wchar_t *
180__wcschrnul (const wchar_t *s, wint_t c)
181{
182 wchar_t *result = wcschr (s, c);
183 if (result == NULL)
184 result = wcschr (s, '\0');
185 return result;
186}
187# endif
188
189/* Note that this evaluates C many times. */
190# ifdef _LIBC
191# define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
192# else
193# define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
194# endif
195# define CHAR char
196# define UCHAR unsigned char
197# define INT int
198# define FCT internal_fnmatch
199# define EXT ext_match
200# define END end_pattern
201# define STRUCT fnmatch_struct
202# define L(CS) CS
203# ifdef _LIBC
204# define BTOWC(C) __btowc (C)
205# else
206# define BTOWC(C) btowc (C)
207# endif
208# define STRLEN(S) strlen (S)
209# define STRCAT(D, S) strcat (D, S)
210# define MEMPCPY(D, S, N) __mempcpy (D, S, N)
211# define MEMCHR(S, C, N) memchr (S, C, N)
212# define STRCOLL(S1, S2) strcoll (S1, S2)
213# define WIDE_CHAR_VERSION 0
214# include <locale/weight.h>
215# define FINDIDX findidx
216# include "fnmatch_loop.c"
217
218
219# if HANDLE_MULTIBYTE
220/* Note that this evaluates C many times. */
221# ifdef _LIBC
222# define FOLD(c) ((flags & FNM_CASEFOLD) ? __towlower (c) : (c))
223# else
224# define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? towlower (c) : (c))
225# endif
226# define CHAR wchar_t
227# define UCHAR wint_t
228# define INT wint_t
229# define FCT internal_fnwmatch
230# define EXT ext_wmatch
231# define END end_wpattern
232# define STRUCT fnwmatch_struct
233# define L(CS) L##CS
234# define BTOWC(C) (C)
235# define STRLEN(S) __wcslen (S)
236# define STRCAT(D, S) __wcscat (D, S)
237# define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
238# define MEMCHR(S, C, N) __wmemchr (S, C, N)
239# define STRCOLL(S1, S2) wcscoll (S1, S2)
240# define WIDE_CHAR_VERSION 1
241/* Change the name the header defines so it doesn't conflict with
242 the <locale/weight.h> version included above. */
243# define findidx findidxwc
244# include <locale/weightwc.h>
245# undef findidx
246# define FINDIDX findidxwc
247
248# undef IS_CHAR_CLASS
249/* We have to convert the wide character string in a multibyte string. But
250 we know that the character class names consist of alphanumeric characters
251 from the portable character set, and since the wide character encoding
252 for a member of the portable character set is the same code point as
253 its single-byte encoding, we can use a simplified method to convert the
254 string to a multibyte character string. */
255static wctype_t
256is_char_class (const wchar_t *wcs)
257{
258 char s[CHAR_CLASS_MAX_LENGTH + 1];
259 char *cp = s;
260
261 do
262 {
263 /* Test for a printable character from the portable character set. */
264# ifdef _LIBC
265 if (*wcs < 0x20 || *wcs > 0x7e
266 || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
267 return (wctype_t) 0;
268# else
269 switch (*wcs)
270 {
271 case L' ': case L'!': case L'"': case L'#': case L'%':
272 case L'&': case L'\'': case L'(': case L')': case L'*':
273 case L'+': case L',': case L'-': case L'.': case L'/':
274 case L'0': case L'1': case L'2': case L'3': case L'4':
275 case L'5': case L'6': case L'7': case L'8': case L'9':
276 case L':': case L';': case L'<': case L'=': case L'>':
277 case L'?':
278 case L'A': case L'B': case L'C': case L'D': case L'E':
279 case L'F': case L'G': case L'H': case L'I': case L'J':
280 case L'K': case L'L': case L'M': case L'N': case L'O':
281 case L'P': case L'Q': case L'R': case L'S': case L'T':
282 case L'U': case L'V': case L'W': case L'X': case L'Y':
283 case L'Z':
284 case L'[': case L'\\': case L']': case L'^': case L'_':
285 case L'a': case L'b': case L'c': case L'd': case L'e':
286 case L'f': case L'g': case L'h': case L'i': case L'j':
287 case L'k': case L'l': case L'm': case L'n': case L'o':
288 case L'p': case L'q': case L'r': case L's': case L't':
289 case L'u': case L'v': case L'w': case L'x': case L'y':
290 case L'z': case L'{': case L'|': case L'}': case L'~':
291 break;
292 default:
293 return (wctype_t) 0;
294 }
295# endif
296
297 /* Avoid overrunning the buffer. */
298 if (cp == s + CHAR_CLASS_MAX_LENGTH)
299 return (wctype_t) 0;
300
301 *cp++ = (char) *wcs++;
302 }
303 while (*wcs != L'\0');
304
305 *cp = '\0';
306
307# ifdef _LIBC
308 return __wctype (s);
309# else
310 return wctype (s);
311# endif
312}
313# define IS_CHAR_CLASS(string) is_char_class (string)
314
315# include "fnmatch_loop.c"
316# endif
317
318
319int
320fnmatch (const char *pattern, const char *string, int flags)
321{
322# if HANDLE_MULTIBYTE
323 if (__builtin_expect (MB_CUR_MAX, 1) != 1)
324 {
325 mbstate_t ps;
326 size_t n;
327 const char *p;
328 wchar_t *wpattern_malloc = NULL;
329 wchar_t *wpattern;
330 wchar_t *wstring_malloc = NULL;
331 wchar_t *wstring;
332 size_t alloca_used = 0;
333
334 /* Convert the strings into wide characters. */
335 memset (&ps, '\0', sizeof (ps));
336 p = pattern;
337#ifdef _LIBC
338 n = __strnlen (pattern, 1024);
339#else
340 n = strlen (pattern);
341#endif
342 if (__glibc_likely (n < 1024))
343 {
344 wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
345 alloca_used);
346 n = mbsrtowcs (wpattern, &p, n + 1, &ps);
347 if (__glibc_unlikely (n == (size_t) -1))
348 /* Something wrong.
349 XXX Do we have to set `errno' to something which mbsrtows hasn't
350 already done? */
351 return -1;
352 if (p)
353 {
354 memset (&ps, '\0', sizeof (ps));
355 goto prepare_wpattern;
356 }
357 }
358 else
359 {
360 prepare_wpattern:
361 n = mbsrtowcs (NULL, &pattern, 0, &ps);
362 if (__glibc_unlikely (n == (size_t) -1))
363 /* Something wrong.
364 XXX Do we have to set `errno' to something which mbsrtows hasn't
365 already done? */
366 return -1;
367 if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
368 {
369 __set_errno (ENOMEM);
370 return -2;
371 }
372 wpattern_malloc = wpattern
373 = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
374 assert (mbsinit (&ps));
375 if (wpattern == NULL)
376 return -2;
377 (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
378 }
379
380 assert (mbsinit (&ps));
381#ifdef _LIBC
382 n = __strnlen (string, 1024);
383#else
384 n = strlen (string);
385#endif
386 p = string;
387 if (__glibc_likely (n < 1024))
388 {
389 wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
390 alloca_used);
391 n = mbsrtowcs (wstring, &p, n + 1, &ps);
392 if (__glibc_unlikely (n == (size_t) -1))
393 {
394 /* Something wrong.
395 XXX Do we have to set `errno' to something which
396 mbsrtows hasn't already done? */
397 free_return:
398 free (wpattern_malloc);
399 return -1;
400 }
401 if (p)
402 {
403 memset (&ps, '\0', sizeof (ps));
404 goto prepare_wstring;
405 }
406 }
407 else
408 {
409 prepare_wstring:
410 n = mbsrtowcs (NULL, &string, 0, &ps);
411 if (__glibc_unlikely (n == (size_t) -1))
412 /* Something wrong.
413 XXX Do we have to set `errno' to something which mbsrtows hasn't
414 already done? */
415 goto free_return;
416 if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
417 {
418 free (wpattern_malloc);
419 __set_errno (ENOMEM);
420 return -2;
421 }
422
423 wstring_malloc = wstring
424 = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
425 if (wstring == NULL)
426 {
427 free (wpattern_malloc);
428 return -2;
429 }
430 assert (mbsinit (&ps));
431 (void) mbsrtowcs (wstring, &string, n + 1, &ps);
432 }
433
434 int res = internal_fnwmatch (wpattern, wstring, wstring + n,
435 flags & FNM_PERIOD, flags, NULL,
436 alloca_used);
437
438 free (wstring_malloc);
439 free (wpattern_malloc);
440
441 return res;
442 }
443# endif /* mbstate_t and mbsrtowcs or _LIBC. */
444
445 return internal_fnmatch (pattern, string, string + strlen (string),
446 flags & FNM_PERIOD, flags, NULL, 0);
447}
448
449# ifdef _LIBC
450# undef fnmatch
451versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
452# if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
453strong_alias (__fnmatch, __fnmatch_old)
454compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
455# endif
456libc_hidden_ver (__fnmatch, fnmatch)
457# endif
458
459#endif /* _LIBC or not __GNU_LIBRARY__. */
460