1 /* Copyright (C) 1991,1992,1993,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006 2 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program 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 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 17 18 #ifndef _LIBC 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 #if ! defined __builtin_expect && __GNUC__ < 3 28 # define __builtin_expect(expr, expected) (expr) 29 #endif 30 31 #include <fnmatch.h> 32 33 #include <alloca.h> 34 #include <assert.h> 35 #include <ctype.h> 36 #include <errno.h> 37 #include <stddef.h> 38 #include <stdbool.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #define WIDE_CHAR_SUPPORT \ 43 (HAVE_WCTYPE_H && HAVE_WCHAR_H && HAVE_BTOWC \ 44 && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY)) 45 46 /* For platform which support the ISO C amendement 1 functionality we 47 support user defined character classes. */ 48 #if defined _LIBC || WIDE_CHAR_SUPPORT 49 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */ 50 # include <wchar.h> 51 # include <wctype.h> 52 #endif 53 54 /* We need some of the locale data (the collation sequence information) 55 but there is no interface to get this information in general. Therefore 56 we support a correct implementation only in glibc. */ 57 #ifdef _LIBC 58 # include "../locale/localeinfo.h" 59 # include "../locale/elem-hash.h" 60 # include "../locale/coll-lookup.h" 61 # include <shlib-compat.h> 62 63 # define CONCAT(a,b) __CONCAT(a,b) 64 # define mbsrtowcs __mbsrtowcs 65 # define fnmatch __fnmatch 66 extern int fnmatch (const char *pattern, const char *string, int flags); 67 #endif 68 69 #ifndef SIZE_MAX 70 # define SIZE_MAX ((size_t) -1) 71 #endif 72 73 /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */ 74 #define NO_LEADING_PERIOD(flags) \ 75 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD)) 76 77 /* Comment out all this code if we are using the GNU C Library, and are not 78 actually compiling the library itself, and have not detected a bug 79 in the library. This code is part of the GNU C 80 Library, but also included in many other GNU distributions. Compiling 81 and linking in this code is a waste when using the GNU C library 82 (especially if it is a shared library). Rather than having every GNU 83 program understand `configure --with-gnu-libc' and omit the object files, 84 it is simpler to just do this in the source for each such file. */ 85 86 #if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU 87 88 89 # if ! (defined isblank || HAVE_DECL_ISBLANK) 90 # define isblank(c) ((c) == ' ' || (c) == '\t') 91 # endif 92 93 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0)) 94 95 # if defined _LIBC || WIDE_CHAR_SUPPORT 96 /* The GNU C library provides support for user-defined character classes 97 and the functions from ISO C amendement 1. */ 98 # ifdef CHARCLASS_NAME_MAX 99 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX 100 # else 101 /* This shouldn't happen but some implementation might still have this 102 problem. Use a reasonable default value. */ 103 # define CHAR_CLASS_MAX_LENGTH 256 104 # endif 105 106 # ifdef _LIBC 107 # define IS_CHAR_CLASS(string) __wctype (string) 108 # else 109 # define IS_CHAR_CLASS(string) wctype (string) 110 # endif 111 112 # ifdef _LIBC 113 # define ISWCTYPE(WC, WT) __iswctype (WC, WT) 114 # else 115 # define ISWCTYPE(WC, WT) iswctype (WC, WT) 116 # endif 117 118 # if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC 119 /* In this case we are implementing the multibyte character handling. */ 120 # define HANDLE_MULTIBYTE 1 121 # endif 122 123 # else 124 # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */ 125 126 # define IS_CHAR_CLASS(string) \ 127 (STREQ (string, "alpha") || STREQ (string, "upper") \ 128 || STREQ (string, "lower") || STREQ (string, "digit") \ 129 || STREQ (string, "alnum") || STREQ (string, "xdigit") \ 130 || STREQ (string, "space") || STREQ (string, "print") \ 131 || STREQ (string, "punct") || STREQ (string, "graph") \ 132 || STREQ (string, "cntrl") || STREQ (string, "blank")) 133 # endif 134 135 /* Avoid depending on library functions or files 136 whose names are inconsistent. */ 137 138 /* Global variable. */ 139 static int posixly_correct; 140 141 # ifndef internal_function 142 /* Inside GNU libc we mark some function in a special way. In other 143 environments simply ignore the marking. */ 144 # define internal_function 145 # endif 146 147 /* Note that this evaluates C many times. */ 148 # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c)) 149 # define CHAR char 150 # define UCHAR unsigned char 151 # define INT int 152 # define FCT internal_fnmatch 153 # define EXT ext_match 154 # define END end_pattern 155 # define L_(CS) CS 156 # ifdef _LIBC 157 # define BTOWC(C) __btowc (C) 158 # else 159 # define BTOWC(C) btowc (C) 160 # endif 161 # define STRLEN(S) strlen (S) 162 # define STRCAT(D, S) strcat (D, S) 163 # ifdef _LIBC 164 # define MEMPCPY(D, S, N) __mempcpy (D, S, N) 165 # else 166 # if HAVE_MEMPCPY 167 # define MEMPCPY(D, S, N) mempcpy (D, S, N) 168 # else 169 # define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N))) 170 # endif 171 # endif 172 # define MEMCHR(S, C, N) memchr (S, C, N) 173 # define STRCOLL(S1, S2) strcoll (S1, S2) 174 # include "fnmatch_loop.c" 175 176 177 # if HANDLE_MULTIBYTE 178 # define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c)) 179 # define CHAR wchar_t 180 # define UCHAR wint_t 181 # define INT wint_t 182 # define FCT internal_fnwmatch 183 # define EXT ext_wmatch 184 # define END end_wpattern 185 # define L_(CS) L##CS 186 # define BTOWC(C) (C) 187 # ifdef _LIBC 188 # define STRLEN(S) __wcslen (S) 189 # define STRCAT(D, S) __wcscat (D, S) 190 # define MEMPCPY(D, S, N) __wmempcpy (D, S, N) 191 # else 192 # define STRLEN(S) wcslen (S) 193 # define STRCAT(D, S) wcscat (D, S) 194 # if HAVE_WMEMPCPY 195 # define MEMPCPY(D, S, N) wmempcpy (D, S, N) 196 # else 197 # define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N)) 198 # endif 199 # endif 200 # define MEMCHR(S, C, N) wmemchr (S, C, N) 201 # define STRCOLL(S1, S2) wcscoll (S1, S2) 202 # define WIDE_CHAR_VERSION 1 203 204 # undef IS_CHAR_CLASS 205 /* We have to convert the wide character string in a multibyte string. But 206 we know that the character class names consist of alphanumeric characters 207 from the portable character set, and since the wide character encoding 208 for a member of the portable character set is the same code point as 209 its single-byte encoding, we can use a simplified method to convert the 210 string to a multibyte character string. */ 211 static wctype_t 212 is_char_class (const wchar_t *wcs) 213 { 214 char s[CHAR_CLASS_MAX_LENGTH + 1]; 215 char *cp = s; 216 217 do 218 { 219 /* Test for a printable character from the portable character set. */ 220 # ifdef _LIBC 221 if (*wcs < 0x20 || *wcs > 0x7e 222 || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60) 223 return (wctype_t) 0; 224 # else 225 switch (*wcs) 226 { 227 case L' ': case L'!': case L'"': case L'#': case L'%': 228 case L'&': case L'\'': case L'(': case L')': case L'*': 229 case L'+': case L',': case L'-': case L'.': case L'/': 230 case L'0': case L'1': case L'2': case L'3': case L'4': 231 case L'5': case L'6': case L'7': case L'8': case L'9': 232 case L':': case L';': case L'<': case L'=': case L'>': 233 case L'?': 234 case L'A': case L'B': case L'C': case L'D': case L'E': 235 case L'F': case L'G': case L'H': case L'I': case L'J': 236 case L'K': case L'L': case L'M': case L'N': case L'O': 237 case L'P': case L'Q': case L'R': case L'S': case L'T': 238 case L'U': case L'V': case L'W': case L'X': case L'Y': 239 case L'Z': 240 case L'[': case L'\\': case L']': case L'^': case L'_': 241 case L'a': case L'b': case L'c': case L'd': case L'e': 242 case L'f': case L'g': case L'h': case L'i': case L'j': 243 case L'k': case L'l': case L'm': case L'n': case L'o': 244 case L'p': case L'q': case L'r': case L's': case L't': 245 case L'u': case L'v': case L'w': case L'x': case L'y': 246 case L'z': case L'{': case L'|': case L'}': case L'~': 247 break; 248 default: 249 return (wctype_t) 0; 250 } 251 # endif 252 253 /* Avoid overrunning the buffer. */ 254 if (cp == s + CHAR_CLASS_MAX_LENGTH) 255 return (wctype_t) 0; 256 257 *cp++ = (char) *wcs++; 258 } 259 while (*wcs != L'\0'); 260 261 *cp = '\0'; 262 263 # ifdef _LIBC 264 return __wctype (s); 265 # else 266 return wctype (s); 267 # endif 268 } 269 # define IS_CHAR_CLASS(string) is_char_class (string) 270 271 # include "fnmatch_loop.c" 272 # endif 273 274 275 int 276 fnmatch (const char *pattern, const char *string, int flags) 277 { 278 # if HANDLE_MULTIBYTE 279 # if HAVE_ALLOCA || defined _LIBC 280 # define ALLOCA_LIMIT 2000 281 # else 282 # define ALLOCA_LIMIT 0 283 # endif 284 if (__builtin_expect (MB_CUR_MAX, 1) != 1) 285 { 286 mbstate_t ps; 287 size_t patsize; 288 size_t strsize; 289 size_t totsize; 290 wchar_t *wpattern; 291 wchar_t *wstring; 292 int res; 293 294 /* Calculate the size needed to convert the strings to 295 wide characters. */ 296 memset (&ps, '\0', sizeof (ps)); 297 patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1; 298 if (__builtin_expect (patsize != 0, 1)) 299 { 300 assert (mbsinit (&ps)); 301 strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1; 302 if (__builtin_expect (strsize != 0, 1)) 303 { 304 assert (mbsinit (&ps)); 305 totsize = patsize + strsize; 306 if (__builtin_expect (! (patsize <= totsize 307 && totsize <= SIZE_MAX / sizeof (wchar_t)), 308 0)) 309 { 310 errno = ENOMEM; 311 return -1; 312 } 313 314 /* Allocate room for the wide characters. */ 315 if (__builtin_expect (totsize < ALLOCA_LIMIT, 1)) 316 wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t)); 317 else 318 { 319 wpattern = malloc (totsize * sizeof (wchar_t)); 320 if (__builtin_expect (! wpattern, 0)) 321 { 322 errno = ENOMEM; 323 return -1; 324 } 325 } 326 wstring = wpattern + patsize; 327 328 /* Convert the strings into wide characters. */ 329 mbsrtowcs (wpattern, &pattern, patsize, &ps); 330 assert (mbsinit (&ps)); 331 mbsrtowcs (wstring, &string, strsize, &ps); 332 333 res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1, 334 flags & FNM_PERIOD, flags); 335 336 if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0)) 337 free (wpattern); 338 return res; 339 } 340 } 341 } 342 343 # endif /* HANDLE_MULTIBYTE */ 344 345 return internal_fnmatch (pattern, string, string + strlen (string), 346 flags & FNM_PERIOD, flags); 347 } 348 349 # ifdef _LIBC 350 # undef fnmatch 351 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3); 352 # if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3) 353 strong_alias (__fnmatch, __fnmatch_old) 354 compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0); 355 # endif 356 libc_hidden_ver (__fnmatch, fnmatch) 357 # endif 358 359 #endif /* _LIBC or not __GNU_LIBRARY__. */ 360