u-tools/apps/tar/gnu/fnmatch.c

   1 /* -*- buffer-read-only: t -*- vi: set ro: */
   2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
   3 /* Copyright (C) 1991-1993, 1996-2007, 2009-2011 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifndef _LIBC
  20 # include <config.h>
  21 #endif
  22
  23 /* Enable GNU extensions in fnmatch.h.  */
  24 #ifndef _GNU_SOURCE
  25 # define _GNU_SOURCE    1
  26 #endif
  27
  28 #if ! defined __builtin_expect && __GNUC__ < 3
  29 # define __builtin_expect(expr, expected) (expr)
  30 #endif
  31
  32 #include <fnmatch.h>
  33
  34 #include <alloca.h>
  35 #include <assert.h>
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <stddef.h>
  39 #include <stdbool.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #define WIDE_CHAR_SUPPORT \
  44   (HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \
  45    && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))
  46
  47 /* For platform which support the ISO C amendement 1 functionality we
  48    support user defined character classes.  */
  49 #if defined _LIBC || WIDE_CHAR_SUPPORT
  50 # include <wctype.h>
  51 # include <wchar.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_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 #  define ALLOCA_LIMIT 2000
 280   if (__builtin_expect (MB_CUR_MAX, 1) != 1)
 281     {
 282       mbstate_t ps;
 283       size_t patsize;
 284       size_t strsize;
 285       size_t totsize;
 286       wchar_t *wpattern;
 287       wchar_t *wstring;
 288       int res;
 289
 290       /* Calculate the size needed to convert the strings to
 291          wide characters.  */
 292       memset (&ps, '\0', sizeof (ps));
 293       patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
 294       if (__builtin_expect (patsize != 0, 1))
 295         {
 296           assert (mbsinit (&ps));
 297           strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
 298           if (__builtin_expect (strsize != 0, 1))
 299             {
 300               assert (mbsinit (&ps));
 301               totsize = patsize + strsize;
 302               if (__builtin_expect (! (patsize <= totsize
 303                                        && totsize <= SIZE_MAX / sizeof (wchar_t)),
 304                                     0))
 305                 {
 306                   errno = ENOMEM;
 307                   return -1;
 308                 }
 309
 310               /* Allocate room for the wide characters.  */
 311               if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
 312                 wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));
 313               else
 314                 {
 315                   wpattern = malloc (totsize * sizeof (wchar_t));
 316                   if (__builtin_expect (! wpattern, 0))
 317                     {
 318                       errno = ENOMEM;
 319                       return -1;
 320                     }
 321                 }
 322               wstring = wpattern + patsize;
 323
 324               /* Convert the strings into wide characters.  */
 325               mbsrtowcs (wpattern, &pattern, patsize, &ps);
 326               assert (mbsinit (&ps));
 327               mbsrtowcs (wstring, &string, strsize, &ps);
 328
 329               res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
 330                                        flags & FNM_PERIOD, flags);
 331
 332               if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
 333                 free (wpattern);
 334               return res;
 335             }
 336         }
 337     }
 338
 339 # endif /* HANDLE_MULTIBYTE */
 340
 341   return internal_fnmatch (pattern, string, string + strlen (string),
 342                            flags & FNM_PERIOD, flags);
 343 }
 344
 345 # ifdef _LIBC
 346 #  undef fnmatch
 347 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
 348 #  if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
 349 strong_alias (__fnmatch, __fnmatch_old)
 350 compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
 351 #  endif
 352 libc_hidden_ver (__fnmatch, fnmatch)
 353 # endif
 354
 355 #endif  /* _LIBC or not __GNU_LIBRARY__.  */