1 /* Copyright (C) 1991-1993, 1996-2007, 2009-2018 Free Software Foundation, Inc. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; either version 3, or (at your option) 6 any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program; if not, see <https://www.gnu.org/licenses/>. */ 15 16 #ifndef _LIBC 17 # include <config.h> 18 #endif 19 20 /* Enable GNU extensions in fnmatch.h. */ 21 #ifndef _GNU_SOURCE 22 # define _GNU_SOURCE 1 23 #endif 24 25 #include <fnmatch.h> 26 27 #include <alloca.h> 28 #include <assert.h> 29 #include <ctype.h> 30 #include <errno.h> 31 #include <stddef.h> 32 #include <stdbool.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 #define WIDE_CHAR_SUPPORT \ 37 (HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \ 38 && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY)) 39 40 /* For platform which support the ISO C amendment 1 functionality we 41 support user defined character classes. */ 42 #if defined _LIBC || WIDE_CHAR_SUPPORT 43 # include <wctype.h> 44 # include <wchar.h> 45 #endif 46 47 /* We need some of the locale data (the collation sequence information) 48 but there is no interface to get this information in general. Therefore 49 we support a correct implementation only in glibc. */ 50 #ifdef _LIBC 51 # include "../locale/localeinfo.h" 52 # include "../locale/elem-hash.h" 53 # include "../locale/coll-lookup.h" 54 # include <shlib-compat.h> 55 56 # define CONCAT(a,b) __CONCAT(a,b) 57 # define mbsrtowcs __mbsrtowcs 58 # define fnmatch __fnmatch 59 extern int fnmatch (const char *pattern, const char *string, int flags); 60 #endif 61 62 #ifndef SIZE_MAX 63 # define SIZE_MAX ((size_t) -1) 64 #endif 65 66 #include "flexmember.h" 67 68 #ifndef FALLTHROUGH 69 # if __GNUC__ < 7 70 # define FALLTHROUGH ((void) 0) 71 # else 72 # define FALLTHROUGH __attribute__ ((__fallthrough__)) 73 # endif 74 #endif 75 76 /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */ 77 #define NO_LEADING_PERIOD(flags) \ 78 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD)) 79 80 /* Comment out all this code if we are using the GNU C Library, and are not 81 actually compiling the library itself, and have not detected a bug 82 in the library. This code is part of the GNU C 83 Library, but also included in many other GNU distributions. Compiling 84 and linking in this code is a waste when using the GNU C library 85 (especially if it is a shared library). Rather than having every GNU 86 program understand 'configure --with-gnu-libc' and omit the object files, 87 it is simpler to just do this in the source for each such file. */ 88 89 #if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU 90 91 92 # if ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK)) 93 # define isblank(c) ((c) == ' ' || (c) == '\t') 94 # endif 95 96 # define STREQ(s1, s2) (strcmp (s1, s2) == 0) 97 98 # if defined _LIBC || WIDE_CHAR_SUPPORT 99 /* The GNU C library provides support for user-defined character classes 100 and the functions from ISO C amendment 1. */ 101 # ifdef CHARCLASS_NAME_MAX 102 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX 103 # else 104 /* This shouldn't happen but some implementation might still have this 105 problem. Use a reasonable default value. */ 106 # define CHAR_CLASS_MAX_LENGTH 256 107 # endif 108 109 # ifdef _LIBC 110 # define IS_CHAR_CLASS(string) __wctype (string) 111 # else 112 # define IS_CHAR_CLASS(string) wctype (string) 113 # endif 114 115 # ifdef _LIBC 116 # define ISWCTYPE(WC, WT) __iswctype (WC, WT) 117 # else 118 # define ISWCTYPE(WC, WT) iswctype (WC, WT) 119 # endif 120 121 # if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC 122 /* In this case we are implementing the multibyte character handling. */ 123 # define HANDLE_MULTIBYTE 1 124 # endif 125 126 # else 127 # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, 'xdigit'. */ 128 129 # define IS_CHAR_CLASS(string) \ 130 (STREQ (string, "alpha") || STREQ (string, "upper") \ 131 || STREQ (string, "lower") || STREQ (string, "digit") \ 132 || STREQ (string, "alnum") || STREQ (string, "xdigit") \ 133 || STREQ (string, "space") || STREQ (string, "print") \ 134 || STREQ (string, "punct") || STREQ (string, "graph") \ 135 || STREQ (string, "cntrl") || STREQ (string, "blank")) 136 # endif 137 138 /* Avoid depending on library functions or files 139 whose names are inconsistent. */ 140 141 /* Global variable. */ 142 static int posixly_correct; 143 144 # ifndef internal_function 145 /* Inside GNU libc we mark some function in a special way. In other 146 environments simply ignore the marking. */ 147 # define internal_function 148 # endif 149 150 /* Note that this evaluates C many times. */ 151 # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c)) 152 # define CHAR char 153 # define UCHAR unsigned char 154 # define INT int 155 # define FCT internal_fnmatch 156 # define EXT ext_match 157 # define END end_pattern 158 # define L_(CS) CS 159 # ifdef _LIBC 160 # define BTOWC(C) __btowc (C) 161 # else 162 # define BTOWC(C) btowc (C) 163 # endif 164 # define STRLEN(S) strlen (S) 165 # define STRCAT(D, S) strcat (D, S) 166 # ifdef _LIBC 167 # define MEMPCPY(D, S, N) __mempcpy (D, S, N) 168 # else 169 # if HAVE_MEMPCPY 170 # define MEMPCPY(D, S, N) mempcpy (D, S, N) 171 # else 172 # define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N))) 173 # endif 174 # endif 175 # define MEMCHR(S, C, N) memchr (S, C, N) 176 # include "fnmatch_loop.c" 177 178 179 # if HANDLE_MULTIBYTE 180 # define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c)) 181 # define CHAR wchar_t 182 # define UCHAR wint_t 183 # define INT wint_t 184 # define FCT internal_fnwmatch 185 # define EXT ext_wmatch 186 # define END end_wpattern 187 # define L_(CS) L##CS 188 # define BTOWC(C) (C) 189 # ifdef _LIBC 190 # define STRLEN(S) __wcslen (S) 191 # define STRCAT(D, S) __wcscat (D, S) 192 # define MEMPCPY(D, S, N) __wmempcpy (D, S, N) 193 # else 194 # define STRLEN(S) wcslen (S) 195 # define STRCAT(D, S) wcscat (D, S) 196 # if HAVE_WMEMPCPY 197 # define MEMPCPY(D, S, N) wmempcpy (D, S, N) 198 # else 199 # define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N)) 200 # endif 201 # endif 202 # define MEMCHR(S, C, N) wmemchr (S, C, N) 203 # define WIDE_CHAR_VERSION 1 204 205 # undef IS_CHAR_CLASS 206 /* We have to convert the wide character string in a multibyte string. But 207 we know that the character class names consist of alphanumeric characters 208 from the portable character set, and since the wide character encoding 209 for a member of the portable character set is the same code point as 210 its single-byte encoding, we can use a simplified method to convert the 211 string to a multibyte character string. */ 212 static wctype_t 213 is_char_class (const wchar_t *wcs) 214 { 215 char s[CHAR_CLASS_MAX_LENGTH + 1]; 216 char *cp = s; 217 218 do 219 { 220 /* Test for a printable character from the portable character set. */ 221 # ifdef _LIBC 222 if (*wcs < 0x20 || *wcs > 0x7e 223 || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60) 224 return (wctype_t) 0; 225 # else 226 switch (*wcs) 227 { 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'+': case L',': case L'-': case L'.': case L'/': 231 case L'0': case L'1': case L'2': case L'3': case L'4': 232 case L'5': case L'6': case L'7': case L'8': case L'9': 233 case L':': case L';': case L'<': case L'=': case L'>': 234 case L'?': 235 case L'A': case L'B': case L'C': case L'D': case L'E': 236 case L'F': case L'G': case L'H': case L'I': case L'J': 237 case L'K': case L'L': case L'M': case L'N': case L'O': 238 case L'P': case L'Q': case L'R': case L'S': case L'T': 239 case L'U': case L'V': case L'W': case L'X': case L'Y': 240 case L'Z': 241 case L'[': case L'\\': case L']': case L'^': case L'_': 242 case L'a': case L'b': case L'c': case L'd': case L'e': 243 case L'f': case L'g': case L'h': case L'i': case L'j': 244 case L'k': case L'l': case L'm': case L'n': case L'o': 245 case L'p': case L'q': case L'r': case L's': case L't': 246 case L'u': case L'v': case L'w': case L'x': case L'y': 247 case L'z': case L'{': case L'|': case L'}': case L'~': 248 break; 249 default: 250 return (wctype_t) 0; 251 } 252 # endif 253 254 /* Avoid overrunning the buffer. */ 255 if (cp == s + CHAR_CLASS_MAX_LENGTH) 256 return (wctype_t) 0; 257 258 *cp++ = (char) *wcs++; 259 } 260 while (*wcs != L'\0'); 261 262 *cp = '\0'; 263 264 # ifdef _LIBC 265 return __wctype (s); 266 # else 267 return wctype (s); 268 # endif 269 } 270 # define IS_CHAR_CLASS(string) is_char_class (string) 271 272 # include "fnmatch_loop.c" 273 # endif 274 275 276 int 277 fnmatch (const char *pattern, const char *string, int flags) 278 { 279 # if HANDLE_MULTIBYTE 280 # define ALLOCA_LIMIT 2000 281 if (__builtin_expect (MB_CUR_MAX, 1) != 1) 282 { 283 mbstate_t ps; 284 size_t patsize; 285 size_t strsize; 286 size_t totsize; 287 wchar_t *wpattern; 288 wchar_t *wstring; 289 int res; 290 291 /* Calculate the size needed to convert the strings to 292 wide characters. */ 293 memset (&ps, '\0', sizeof (ps)); 294 patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1; 295 if (__builtin_expect (patsize != 0, 1)) 296 { 297 assert (mbsinit (&ps)); 298 strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1; 299 if (__builtin_expect (strsize != 0, 1)) 300 { 301 assert (mbsinit (&ps)); 302 totsize = patsize + strsize; 303 if (__builtin_expect (! (patsize <= totsize 304 && totsize <= SIZE_MAX / sizeof (wchar_t)), 305 0)) 306 { 307 errno = ENOMEM; 308 return -1; 309 } 310 311 /* Allocate room for the wide characters. */ 312 if (__builtin_expect (totsize < ALLOCA_LIMIT, 1)) 313 wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t)); 314 else 315 { 316 wpattern = malloc (totsize * sizeof (wchar_t)); 317 if (__builtin_expect (! wpattern, 0)) 318 { 319 errno = ENOMEM; 320 return -1; 321 } 322 } 323 wstring = wpattern + patsize; 324 325 /* Convert the strings into wide characters. */ 326 mbsrtowcs (wpattern, &pattern, patsize, &ps); 327 assert (mbsinit (&ps)); 328 mbsrtowcs (wstring, &string, strsize, &ps); 329 330 res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1, 331 flags & FNM_PERIOD, flags); 332 333 if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0)) 334 free (wpattern); 335 return res; 336 } 337 } 338 } 339 340 # endif /* HANDLE_MULTIBYTE */ 341 342 return internal_fnmatch (pattern, string, string + strlen (string), 343 flags & FNM_PERIOD, flags); 344 } 345 346 # ifdef _LIBC 347 # undef fnmatch 348 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3); 349 # if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3) 350 strong_alias (__fnmatch, __fnmatch_old) 351 compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0); 352 # endif 353 libc_hidden_ver (__fnmatch, fnmatch) 354 # endif 355 356 #endif /* _LIBC or not __GNU_LIBRARY__. */ 357