posix/fnmatch.c

   1 /* Copyright (C) 1991,1992,1993,1996,1997,1998,1999,2000,2001,2002,2003,2007,2010,2011
   2         Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 /* Enable GNU extensions in fnmatch.h.  */
  25 #ifndef _GNU_SOURCE
  26 # define _GNU_SOURCE    1
  27 #endif
  28
  29 #include <assert.h>
  30 #include <errno.h>
  31 #include <fnmatch.h>
  32 #include <ctype.h>
  33
  34 #if HAVE_STRING_H || defined _LIBC
  35 # include <string.h>
  36 #else
  37 # include <strings.h>
  38 #endif
  39
  40 #if defined STDC_HEADERS || defined _LIBC
  41 # include <stdlib.h>
  42 #endif
  43
  44 #ifdef _LIBC
  45 # include <alloca.h>
  46 #else
  47 # define alloca_account(size., var) alloca (size)
  48 #endif
  49
  50 /* For platform which support the ISO C amendement 1 functionality we
  51    support user defined character classes.  */
  52 #if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
  53 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.  */
  54 # include <wchar.h>
  55 # include <wctype.h>
  56 #endif
  57
  58 /* We need some of the locale data (the collation sequence information)
  59    but there is no interface to get this information in general.  Therefore
  60    we support a correct implementation only in glibc.  */
  61 #ifdef _LIBC
  62 # include "../locale/localeinfo.h"
  63 # include "../locale/elem-hash.h"
  64 # include "../locale/coll-lookup.h"
  65 # include <shlib-compat.h>
  66
  67 # define CONCAT(a,b) __CONCAT(a,b)
  68 # define mbsrtowcs __mbsrtowcs
  69 # define fnmatch __fnmatch
  70 extern int fnmatch (const char *pattern, const char *string, int flags);
  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.  This code is part of the GNU C
  79    Library, but also included in many other GNU distributions.  Compiling
  80    and linking in this code is a waste when using the GNU C library
  81    (especially if it is a shared library).  Rather than having every GNU
  82    program understand `configure --with-gnu-libc' and omit the object files,
  83    it is simpler to just do this in the source for each such file.  */
  84
  85 #if defined _LIBC || !defined __GNU_LIBRARY__
  86
  87
  88 # if defined STDC_HEADERS || !defined isascii
  89 #  define ISASCII(c) 1
  90 # else
  91 #  define ISASCII(c) isascii(c)
  92 # endif
  93
  94 # ifdef isblank
  95 #  define ISBLANK(c) (ISASCII (c) && isblank (c))
  96 # else
  97 #  define ISBLANK(c) ((c) == ' ' || (c) == '\t')
  98 # endif
  99 # ifdef isgraph
 100 #  define ISGRAPH(c) (ISASCII (c) && isgraph (c))
 101 # else
 102 #  define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
 103 # endif
 104
 105 # define ISPRINT(c) (ISASCII (c) && isprint (c))
 106 # define ISDIGIT(c) (ISASCII (c) && isdigit (c))
 107 # define ISALNUM(c) (ISASCII (c) && isalnum (c))
 108 # define ISALPHA(c) (ISASCII (c) && isalpha (c))
 109 # define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
 110 # define ISLOWER(c) (ISASCII (c) && islower (c))
 111 # define ISPUNCT(c) (ISASCII (c) && ispunct (c))
 112 # define ISSPACE(c) (ISASCII (c) && isspace (c))
 113 # define ISUPPER(c) (ISASCII (c) && isupper (c))
 114 # define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
 115
 116 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
 117
 118 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
 119 /* The GNU C library provides support for user-defined character classes
 120    and the functions from ISO C amendement 1.  */
 121 #  ifdef CHARCLASS_NAME_MAX
 122 #   define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
 123 #  else
 124 /* This shouldn't happen but some implementation might still have this
 125    problem.  Use a reasonable default value.  */
 126 #   define CHAR_CLASS_MAX_LENGTH 256
 127 #  endif
 128
 129 #  ifdef _LIBC
 130 #   define IS_CHAR_CLASS(string) __wctype (string)
 131 #  else
 132 #   define IS_CHAR_CLASS(string) wctype (string)
 133 #  endif
 134
 135 #  ifdef _LIBC
 136 #   define ISWCTYPE(WC, WT)     __iswctype (WC, WT)
 137 #  else
 138 #   define ISWCTYPE(WC, WT)     iswctype (WC, WT)
 139 #  endif
 140
 141 #  if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
 142 /* In this case we are implementing the multibyte character handling.  */
 143 #   define HANDLE_MULTIBYTE     1
 144 #  endif
 145
 146 # else
 147 #  define CHAR_CLASS_MAX_LENGTH  6 /* Namely, `xdigit'.  */
 148
 149 #  define IS_CHAR_CLASS(string)                                               \
 150    (STREQ (string, "alpha") || STREQ (string, "upper")                        \
 151     || STREQ (string, "lower") || STREQ (string, "digit")                     \
 152     || STREQ (string, "alnum") || STREQ (string, "xdigit")                    \
 153     || STREQ (string, "space") || STREQ (string, "print")                     \
 154     || STREQ (string, "punct") || STREQ (string, "graph")                     \
 155     || STREQ (string, "cntrl") || STREQ (string, "blank"))
 156 # endif
 157
 158 /* Avoid depending on library functions or files
 159    whose names are inconsistent.  */
 160
 161 # if !defined _LIBC && !defined getenv
 162 extern char *getenv ();
 163 # endif
 164
 165 # ifndef errno
 166 extern int errno;
 167 # endif
 168
 169 /* Global variable.  */
 170 static int posixly_correct;
 171
 172 /* This function doesn't exist on most systems.  */
 173
 174 # if !defined HAVE___STRCHRNUL && !defined _LIBC
 175 static char *
 176 __strchrnul (s, c)
 177      const char *s;
 178      int c;
 179 {
 180   char *result = strchr (s, c);
 181   if (result == NULL)
 182     result = strchr (s, '\0');
 183   return result;
 184 }
 185 # endif
 186
 187 # if HANDLE_MULTIBYTE && !defined HAVE___STRCHRNUL && !defined _LIBC
 188 static wchar_t *
 189 __wcschrnul (s, c)
 190      const wchar_t *s;
 191      wint_t c;
 192 {
 193   wchar_t *result = wcschr (s, c);
 194   if (result == NULL)
 195     result = wcschr (s, '\0');
 196   return result;
 197 }
 198 # endif
 199
 200 # ifndef internal_function
 201 /* Inside GNU libc we mark some function in a special way.  In other
 202    environments simply ignore the marking.  */
 203 #  define internal_function
 204 # endif
 205
 206 /* Note that this evaluates C many times.  */
 207 # ifdef _LIBC
 208 #  define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
 209 # else
 210 #  define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
 211 # endif
 212 # define CHAR   char
 213 # define UCHAR  unsigned char
 214 # define INT    int
 215 # define FCT    internal_fnmatch
 216 # define EXT    ext_match
 217 # define END    end_pattern
 218 # define STRUCT fnmatch_struct
 219 # define L(CS)  CS
 220 # ifdef _LIBC
 221 #  define BTOWC(C)      __btowc (C)
 222 # else
 223 #  define BTOWC(C)      btowc (C)
 224 # endif
 225 # define STRLEN(S) strlen (S)
 226 # define STRCAT(D, S) strcat (D, S)
 227 # define MEMPCPY(D, S, N) __mempcpy (D, S, N)
 228 # define MEMCHR(S, C, N) memchr (S, C, N)
 229 # define STRCOLL(S1, S2) strcoll (S1, S2)
 230 # include "fnmatch_loop.c"
 231
 232
 233 # if HANDLE_MULTIBYTE
 234 /* Note that this evaluates C many times.  */
 235 #  ifdef _LIBC
 236 #   define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
 237 #  else
 238 #   define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? towlower (c) : (c))
 239 #  endif
 240 #  define CHAR  wchar_t
 241 #  define UCHAR wint_t
 242 #  define INT   wint_t
 243 #  define FCT   internal_fnwmatch
 244 #  define EXT   ext_wmatch
 245 #  define END   end_wpattern
 246 #  define STRUCT fnwmatch_struct
 247 #  define L(CS) L##CS
 248 #  define BTOWC(C)      (C)
 249 #  define STRLEN(S) __wcslen (S)
 250 #  define STRCAT(D, S) __wcscat (D, S)
 251 #  define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
 252 #  define MEMCHR(S, C, N) wmemchr (S, C, N)
 253 #  define STRCOLL(S1, S2) wcscoll (S1, S2)
 254 #  define WIDE_CHAR_VERSION 1
 255
 256 #  undef IS_CHAR_CLASS
 257 /* We have to convert the wide character string in a multibyte string.  But
 258    we know that the character class names consist of alphanumeric characters
 259    from the portable character set, and since the wide character encoding
 260    for a member of the portable character set is the same code point as
 261    its single-byte encoding, we can use a simplified method to convert the
 262    string to a multibyte character string.  */
 263 static wctype_t
 264 is_char_class (const wchar_t *wcs)
 265 {
 266   char s[CHAR_CLASS_MAX_LENGTH + 1];
 267   char *cp = s;
 268
 269   do
 270     {
 271       /* Test for a printable character from the portable character set.  */
 272 #  ifdef _LIBC
 273       if (*wcs < 0x20 || *wcs > 0x7e
 274           || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
 275         return (wctype_t) 0;
 276 #  else
 277       switch (*wcs)
 278         {
 279         case L' ': case L'!': case L'"': case L'#': case L'%':
 280         case L'&': case L'\'': case L'(': case L')': case L'*':
 281         case L'+': case L',': case L'-': case L'.': case L'/':
 282         case L'0': case L'1': case L'2': case L'3': case L'4':
 283         case L'5': case L'6': case L'7': case L'8': case L'9':
 284         case L':': case L';': case L'<': case L'=': case L'>':
 285         case L'?':
 286         case L'A': case L'B': case L'C': case L'D': case L'E':
 287         case L'F': case L'G': case L'H': case L'I': case L'J':
 288         case L'K': case L'L': case L'M': case L'N': case L'O':
 289         case L'P': case L'Q': case L'R': case L'S': case L'T':
 290         case L'U': case L'V': case L'W': case L'X': case L'Y':
 291         case L'Z':
 292         case L'[': case L'\\': case L']': case L'^': case L'_':
 293         case L'a': case L'b': case L'c': case L'd': case L'e':
 294         case L'f': case L'g': case L'h': case L'i': case L'j':
 295         case L'k': case L'l': case L'm': case L'n': case L'o':
 296         case L'p': case L'q': case L'r': case L's': case L't':
 297         case L'u': case L'v': case L'w': case L'x': case L'y':
 298         case L'z': case L'{': case L'|': case L'}': case L'~':
 299           break;
 300         default:
 301           return (wctype_t) 0;
 302         }
 303 #  endif
 304
 305       /* Avoid overrunning the buffer.  */
 306       if (cp == s + CHAR_CLASS_MAX_LENGTH)
 307         return (wctype_t) 0;
 308
 309       *cp++ = (char) *wcs++;
 310     }
 311   while (*wcs != L'\0');
 312
 313   *cp = '\0';
 314
 315 #  ifdef _LIBC
 316   return __wctype (s);
 317 #  else
 318   return wctype (s);
 319 #  endif
 320 }
 321 #  define IS_CHAR_CLASS(string) is_char_class (string)
 322
 323 #  include "fnmatch_loop.c"
 324 # endif
 325
 326
 327 int
 328 fnmatch (pattern, string, flags)
 329      const char *pattern;
 330      const char *string;
 331      int flags;
 332 {
 333 # if HANDLE_MULTIBYTE
 334   if (__builtin_expect (MB_CUR_MAX, 1) != 1)
 335     {
 336       mbstate_t ps;
 337       size_t n;
 338       const char *p;
 339       wchar_t *wpattern_malloc = NULL;
 340       wchar_t *wpattern;
 341       wchar_t *wstring_malloc = NULL;
 342       wchar_t *wstring;
 343       size_t alloca_used = 0;
 344
 345       /* Convert the strings into wide characters.  */
 346       memset (&ps, '\0', sizeof (ps));
 347       p = pattern;
 348 #ifdef _LIBC
 349       n = strnlen (pattern, 1024);
 350 #else
 351       n = strlen (pattern);
 352 #endif
 353       if (__builtin_expect (n < 1024, 1))
 354         {
 355           wpattern = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
 356                                                  alloca_used);
 357           n = mbsrtowcs (wpattern, &p, n + 1, &ps);
 358           if (__builtin_expect (n == (size_t) -1, 0))
 359             /* Something wrong.
 360                XXX Do we have to set `errno' to something which mbsrtows hasn't
 361                already done?  */
 362             return -1;
 363           if (p)
 364             {
 365               memset (&ps, '\0', sizeof (ps));
 366               goto prepare_wpattern;
 367             }
 368         }
 369       else
 370         {
 371         prepare_wpattern:
 372           n = mbsrtowcs (NULL, &pattern, 0, &ps);
 373           if (__builtin_expect (n == (size_t) -1, 0))
 374             /* Something wrong.
 375                XXX Do we have to set `errno' to something which mbsrtows hasn't
 376                already done?  */
 377             return -1;
 378           if (__builtin_expect (n >= (size_t) -1 / sizeof (wchar_t), 0))
 379             {
 380               __set_errno (ENOMEM);
 381               return -2;
 382             }
 383           wpattern_malloc = wpattern
 384             = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
 385           assert (mbsinit (&ps));
 386           if (wpattern == NULL)
 387             return -2;
 388           (void) mbsrtowcs (wpattern, &pattern, n + 1, &ps);
 389         }
 390
 391       assert (mbsinit (&ps));
 392 #ifdef _LIBC
 393       n = strnlen (string, 1024);
 394 #else
 395       n = strlen (string);
 396 #endif
 397       p = string;
 398       if (__builtin_expect (n < 1024, 1))
 399         {
 400           wstring = (wchar_t *) alloca_account ((n + 1) * sizeof (wchar_t),
 401                                                 alloca_used);
 402           n = mbsrtowcs (wstring, &p, n + 1, &ps);
 403           if (__builtin_expect (n == (size_t) -1, 0))
 404             {
 405               /* Something wrong.
 406                  XXX Do we have to set `errno' to something which
 407                  mbsrtows hasn't already done?  */
 408             free_return:
 409               free (wpattern_malloc);
 410               return -1;
 411             }
 412           if (p)
 413             {
 414               memset (&ps, '\0', sizeof (ps));
 415               goto prepare_wstring;
 416             }
 417         }
 418       else
 419         {
 420         prepare_wstring:
 421           n = mbsrtowcs (NULL, &string, 0, &ps);
 422           if (__builtin_expect (n == (size_t) -1, 0))
 423             /* Something wrong.
 424                XXX Do we have to set `errno' to something which mbsrtows hasn't
 425                already done?  */
 426             goto free_return;
 427           if (__builtin_expect (n >= (size_t) -1 / sizeof (wchar_t), 0))
 428             {
 429               free (wpattern_malloc);
 430               __set_errno (ENOMEM);
 431               return -2;
 432             }
 433
 434           wstring_malloc = wstring
 435             = (wchar_t *) malloc ((n + 1) * sizeof (wchar_t));
 436           if (wstring == NULL)
 437             {
 438               free (wpattern_malloc);
 439               return -2;
 440             }
 441           assert (mbsinit (&ps));
 442           (void) mbsrtowcs (wstring, &string, n + 1, &ps);
 443         }
 444
 445       int res = internal_fnwmatch (wpattern, wstring, wstring + n,
 446                                    flags & FNM_PERIOD, flags, NULL,
 447                                    alloca_used);
 448
 449       free (wstring_malloc);
 450       free (wpattern_malloc);
 451
 452       return res;
 453     }
 454 # endif  /* mbstate_t and mbsrtowcs or _LIBC.  */
 455
 456   return internal_fnmatch (pattern, string, string + strlen (string),
 457                            flags & FNM_PERIOD, flags, NULL, 0);
 458 }
 459
 460 # ifdef _LIBC
 461 #  undef fnmatch
 462 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
 463 #  if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
 464 strong_alias (__fnmatch, __fnmatch_old)
 465 compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
 466 #  endif
 467 libc_hidden_ver (__fnmatch, fnmatch)
 468 # endif
 469
 470 #endif  /* _LIBC or not __GNU_LIBRARY__.  */