| 1 | /* Copyright (C) 1991-1993, 1996-2007, 2009-2019 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__. */ |