lib/fnmatch.c

   1 #include "../rsync.h"
   2 #ifndef HAVE_FNMATCH
   3
   4 /* ----- THE FOLLOWING UP TO 'END' is glibc-2.1.2 posix/fnmatch.c
   5      except for the parts with '#if 0' */
   6
   7 /* Copyright (C) 1991, 92, 93, 96, 97, 98, 99 Free Software Foundation, Inc.
   8    This file is part of the GNU C Library.
   9
  10    This library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Library General Public License as
  12    published by the Free Software Foundation; either version 2 of the
  13    License, or (at your option) any later version.
  14
  15    This library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Library General Public License for more details.
  19
  20    You should have received a copy of the GNU Library General Public
  21    License along with this library; see the file COPYING.LIB.  If not,
  22    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #if 0   /* header files included better by ../rsync.h */
  26
  27 #if HAVE_CONFIG_H
  28 # include <config.h>
  29 #endif
  30
  31 /* Enable GNU extensions in fnmatch.h.  */
  32 #ifndef _GNU_SOURCE
  33 # define _GNU_SOURCE    1
  34 #endif
  35
  36 #include <errno.h>
  37 #include <fnmatch.h>
  38 #include <ctype.h>
  39
  40 #if HAVE_STRING_H || defined _LIBC
  41 # include <string.h>
  42 #else
  43 # include <strings.h>
  44 #endif
  45
  46 #if defined STDC_HEADERS || defined _LIBC
  47 # include <stdlib.h>
  48 #endif
  49
  50 #endif /* 0 */
  51 /* For platform which support the ISO C amendement 1 functionality we
  52    support user defined character classes.  */
  53 #if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
  54 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.  */
  55 # include <wchar.h>
  56 # include <wctype.h>
  57 #endif
  58
  59 /* Comment out all this code if we are using the GNU C Library, and are not
  60    actually compiling the library itself.  This code is part of the GNU C
  61    Library, but also included in many other GNU distributions.  Compiling
  62    and linking in this code is a waste when using the GNU C library
  63    (especially if it is a shared library).  Rather than having every GNU
  64    program understand `configure --with-gnu-libc' and omit the object files,
  65    it is simpler to just do this in the source for each such file.  */
  66
  67 #if 1
  68
  69 # if defined STDC_HEADERS || !defined isascii
  70 #  define ISASCII(c) 1
  71 # else
  72 #  define ISASCII(c) isascii(c)
  73 # endif
  74
  75 #ifdef isblank
  76 # define ISBLANK(c) (ISASCII (c) && isblank (c))
  77 #else
  78 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
  79 #endif
  80 #ifdef isgraph
  81 # define ISGRAPH(c) (ISASCII (c) && isgraph (c))
  82 #else
  83 # define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
  84 #endif
  85
  86 #define ISPRINT(c) (ISASCII (c) && isprint (c))
  87 #define ISDIGIT(c) (ISASCII (c) && isdigit (c))
  88 #define ISALNUM(c) (ISASCII (c) && isalnum (c))
  89 #define ISALPHA(c) (ISASCII (c) && isalpha (c))
  90 #define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
  91 #define ISLOWER(c) (ISASCII (c) && islower (c))
  92 #define ISPUNCT(c) (ISASCII (c) && ispunct (c))
  93 #define ISSPACE(c) (ISASCII (c) && isspace (c))
  94 #define ISUPPER(c) (ISASCII (c) && isupper (c))
  95 #define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
  96
  97 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
  98
  99 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
 100 /* The GNU C library provides support for user-defined character classes
 101    and the functions from ISO C amendement 1.  */
 102 #  ifdef CHARCLASS_NAME_MAX
 103 #   define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
 104 #  else
 105 /* This shouldn't happen but some implementation might still have this
 106    problem.  Use a reasonable default value.  */
 107 #   define CHAR_CLASS_MAX_LENGTH 256
 108 #  endif
 109
 110 #  ifdef _LIBC
 111 #   define IS_CHAR_CLASS(string) __wctype (string)
 112 #  else
 113 #   define IS_CHAR_CLASS(string) wctype (string)
 114 #  endif
 115 # else
 116 #  define CHAR_CLASS_MAX_LENGTH  6 /* Namely, `xdigit'.  */
 117
 118 #  define IS_CHAR_CLASS(string)                                               \
 119    (STREQ (string, "alpha") || STREQ (string, "upper")                        \
 120     || STREQ (string, "lower") || STREQ (string, "digit")                     \
 121     || STREQ (string, "alnum") || STREQ (string, "xdigit")                    \
 122     || STREQ (string, "space") || STREQ (string, "print")                     \
 123     || STREQ (string, "punct") || STREQ (string, "graph")                     \
 124     || STREQ (string, "cntrl") || STREQ (string, "blank"))
 125 # endif
 126
 127 /* Avoid depending on library functions or files
 128    whose names are inconsistent.  */
 129
 130 # if !defined _LIBC && !defined getenv
 131 extern char *getenv ();
 132 # endif
 133
 134 # ifndef errno
 135 extern int errno;
 136 # endif
 137
 138 /* Match STRING against the filename pattern PATTERN, returning zero if
 139    it matches, nonzero if not.  */
 140 static int
 141 #ifdef _LIBC
 142 internal_function
 143 #endif
 144 internal_fnmatch (const char *pattern, const char *string,
 145                   int no_leading_period, int flags)
 146 {
 147   register const char *p = pattern, *n = string;
 148   register unsigned char c;
 149
 150 /* Note that this evaluates C many times.  */
 151 # ifdef _LIBC
 152 #  define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
 153 # else
 154 #  define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
 155 # endif
 156
 157   while ((c = *p++) != '\0')
 158     {
 159       c = FOLD (c);
 160
 161       switch (c)
 162         {
 163         case '?':
 164           if (*n == '\0')
 165             return FNM_NOMATCH;
 166           else if (*n == '/' && (flags & FNM_FILE_NAME))
 167             return FNM_NOMATCH;
 168           else if (*n == '.' && no_leading_period
 169                    && (n == string
 170                        || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
 171             return FNM_NOMATCH;
 172           break;
 173
 174         case '\\':
 175           if (!(flags & FNM_NOESCAPE))
 176             {
 177               c = *p++;
 178               if (c == '\0')
 179                 /* Trailing \ loses.  */
 180                 return FNM_NOMATCH;
 181               c = FOLD (c);
 182             }
 183           if (FOLD ((unsigned char) *n) != c)
 184             return FNM_NOMATCH;
 185           break;
 186
 187         case '*':
 188           if (*n == '.' && no_leading_period
 189               && (n == string
 190                   || (n[-1] == '/' && (flags & FNM_FILE_NAME))))
 191             return FNM_NOMATCH;
 192
 193           for (c = *p++; c == '?' || c == '*'; c = *p++)
 194             {
 195               if (*n == '/' && (flags & FNM_FILE_NAME))
 196                 /* A slash does not match a wildcard under FNM_FILE_NAME.  */
 197                 return FNM_NOMATCH;
 198               else if (c == '?')
 199                 {
 200                   /* A ? needs to match one character.  */
 201                   if (*n == '\0')
 202                     /* There isn't another character; no match.  */
 203                     return FNM_NOMATCH;
 204                   else
 205                     /* One character of the string is consumed in matching
 206                        this ? wildcard, so *??? won't match if there are
 207                        less than three characters.  */
 208                     ++n;
 209                 }
 210             }
 211
 212           if (c == '\0')
 213             /* The wildcard(s) is/are the last element of the pattern.
 214                If the name is a file name and contains another slash
 215                this does mean it cannot match.  */
 216             return ((flags & FNM_FILE_NAME) && strchr (n, '/') != NULL
 217                     ? FNM_NOMATCH : 0);
 218           else
 219             {
 220               const char *endp;
 221
 222 #if 0
 223               endp = __strchrnul (n, (flags & FNM_FILE_NAME) ? '/' : '\0');
 224 #else
 225 /* replace call to internal glibc function with equivalent */
 226               if (!(flags & FNM_FILE_NAME) || ((endp = strchr(n, '/')) == NULL))
 227                 endp = n + strlen(n);
 228 #endif
 229
 230               if (c == '[')
 231                 {
 232                   int flags2 = ((flags & FNM_FILE_NAME)
 233                                 ? flags : (flags & ~FNM_PERIOD));
 234
 235                   for (--p; n < endp; ++n)
 236                     if (internal_fnmatch (p, n,
 237                                           (no_leading_period
 238                                            && (n == string
 239                                                || (n[-1] == '/'
 240                                                    && (flags
 241                                                        & FNM_FILE_NAME)))),
 242                                           flags2)
 243                         == 0)
 244                       return 0;
 245                 }
 246               else if (c == '/' && (flags & FNM_FILE_NAME))
 247                 {
 248                   while (*n != '\0' && *n != '/')
 249                     ++n;
 250                   if (*n == '/'
 251                       && (internal_fnmatch (p, n + 1, flags & FNM_PERIOD,
 252                                             flags) == 0))
 253                     return 0;
 254                 }
 255               else
 256                 {
 257                   int flags2 = ((flags & FNM_FILE_NAME)
 258                                 ? flags : (flags & ~FNM_PERIOD));
 259
 260                   if (c == '\\' && !(flags & FNM_NOESCAPE))
 261                     c = *p;
 262                   c = FOLD (c);
 263                   for (--p; n < endp; ++n)
 264                     if (FOLD ((unsigned char) *n) == c
 265                         && (internal_fnmatch (p, n,
 266                                               (no_leading_period
 267                                                && (n == string
 268                                                    || (n[-1] == '/'
 269                                                        && (flags
 270                                                            & FNM_FILE_NAME)))),
 271                                               flags2) == 0))
 272                       return 0;
 273                 }
 274             }
 275
 276           /* If we come here no match is possible with the wildcard.  */
 277           return FNM_NOMATCH;
 278
 279         case '[':
 280           {
 281             /* Nonzero if the sense of the character class is inverted.  */
 282             static int posixly_correct;
 283             register int not;
 284             char cold;
 285
 286             if (posixly_correct == 0)
 287               posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1;
 288
 289             if (*n == '\0')
 290               return FNM_NOMATCH;
 291
 292             if (*n == '.' && no_leading_period && (n == string
 293                                                    || (n[-1] == '/'
 294                                                        && (flags
 295                                                            & FNM_FILE_NAME))))
 296               return FNM_NOMATCH;
 297
 298             if (*n == '/' && (flags & FNM_FILE_NAME))
 299               /* `/' cannot be matched.  */
 300               return FNM_NOMATCH;
 301
 302             not = (*p == '!' || (posixly_correct < 0 && *p == '^'));
 303             if (not)
 304               ++p;
 305
 306             c = *p++;
 307             for (;;)
 308               {
 309                 unsigned char fn = FOLD ((unsigned char) *n);
 310
 311                 if (!(flags & FNM_NOESCAPE) && c == '\\')
 312                   {
 313                     if (*p == '\0')
 314                       return FNM_NOMATCH;
 315                     c = FOLD ((unsigned char) *p);
 316                     ++p;
 317
 318                     if (c == fn)
 319                       goto matched;
 320                   }
 321                 else if (c == '[' && *p == ':')
 322                   {
 323                     /* Leave room for the null.  */
 324                     char str[CHAR_CLASS_MAX_LENGTH + 1];
 325                     size_t c1 = 0;
 326 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
 327                     wctype_t wt;
 328 # endif
 329                     const char *startp = p;
 330
 331                     for (;;)
 332                       {
 333                         if (c1 == CHAR_CLASS_MAX_LENGTH)
 334                           /* The name is too long and therefore the pattern
 335                              is ill-formed.  */
 336                           return FNM_NOMATCH;
 337
 338                         c = *++p;
 339                         if (c == ':' && p[1] == ']')
 340                           {
 341                             p += 2;
 342                             break;
 343                           }
 344                         if (c < 'a' || c >= 'z')
 345                           {
 346                             /* This cannot possibly be a character class name.
 347                                Match it as a normal range.  */
 348                             p = startp;
 349                             c = '[';
 350                             goto normal_bracket;
 351                           }
 352                         str[c1++] = c;
 353                       }
 354                     str[c1] = '\0';
 355
 356 # if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
 357                     wt = IS_CHAR_CLASS (str);
 358                     if (wt == 0)
 359                       /* Invalid character class name.  */
 360                       return FNM_NOMATCH;
 361
 362                     if (__iswctype (__btowc ((unsigned char) *n), wt))
 363                       goto matched;
 364 # else
 365                     if ((STREQ (str, "alnum") && ISALNUM ((unsigned char) *n))
 366                         || (STREQ (str, "alpha") && ISALPHA ((unsigned char) *n))
 367                         || (STREQ (str, "blank") && ISBLANK ((unsigned char) *n))
 368                         || (STREQ (str, "cntrl") && ISCNTRL ((unsigned char) *n))
 369                         || (STREQ (str, "digit") && ISDIGIT ((unsigned char) *n))
 370                         || (STREQ (str, "graph") && ISGRAPH ((unsigned char) *n))
 371                         || (STREQ (str, "lower") && ISLOWER ((unsigned char) *n))
 372                         || (STREQ (str, "print") && ISPRINT ((unsigned char) *n))
 373                         || (STREQ (str, "punct") && ISPUNCT ((unsigned char) *n))
 374                         || (STREQ (str, "space") && ISSPACE ((unsigned char) *n))
 375                         || (STREQ (str, "upper") && ISUPPER ((unsigned char) *n))
 376                         || (STREQ (str, "xdigit") && ISXDIGIT ((unsigned char) *n)))
 377                       goto matched;
 378 # endif
 379                   }
 380                 else if (c == '\0')
 381                   /* [ (unterminated) loses.  */
 382                   return FNM_NOMATCH;
 383                 else
 384                   {
 385                   normal_bracket:
 386                     if (FOLD (c) == fn)
 387                       goto matched;
 388
 389                     cold = c;
 390                     c = *p++;
 391
 392                     if (c == '-' && *p != ']')
 393                       {
 394                         /* It is a range.  */
 395                         unsigned char cend = *p++;
 396                         if (!(flags & FNM_NOESCAPE) && cend == '\\')
 397                           cend = *p++;
 398                         if (cend == '\0')
 399                           return FNM_NOMATCH;
 400
 401                         if (cold <= fn && fn <= FOLD (cend))
 402                           goto matched;
 403
 404                         c = *p++;
 405                       }
 406                   }
 407
 408                 if (c == ']')
 409                   break;
 410               }
 411
 412             if (!not)
 413               return FNM_NOMATCH;
 414             break;
 415
 416           matched:
 417             /* Skip the rest of the [...] that already matched.  */
 418             while (c != ']')
 419               {
 420                 if (c == '\0')
 421                   /* [... (unterminated) loses.  */
 422                   return FNM_NOMATCH;
 423
 424                 c = *p++;
 425                 if (!(flags & FNM_NOESCAPE) && c == '\\')
 426                   {
 427                     if (*p == '\0')
 428                       return FNM_NOMATCH;
 429                     /* XXX 1003.2d11 is unclear if this is right.  */
 430                     ++p;
 431                   }
 432                 else if (c == '[' && *p == ':')
 433                   {
 434                     do
 435                       if (*++p == '\0')
 436                         return FNM_NOMATCH;
 437                     while (*p != ':' || p[1] == ']');
 438                     p += 2;
 439                     c = *p;
 440                   }
 441               }
 442             if (not)
 443               return FNM_NOMATCH;
 444           }
 445           break;
 446
 447         default:
 448           if (c != FOLD ((unsigned char) *n))
 449             return FNM_NOMATCH;
 450         }
 451
 452       ++n;
 453     }
 454
 455   if (*n == '\0')
 456     return 0;
 457
 458   if ((flags & FNM_LEADING_DIR) && *n == '/')
 459     /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
 460     return 0;
 461
 462   return FNM_NOMATCH;
 463
 464 # undef FOLD
 465 }
 466
 467
 468 int
 469 fnmatch (pattern, string, flags)
 470      const char *pattern;
 471      const char *string;
 472      int flags;
 473 {
 474   return internal_fnmatch (pattern, string, flags & FNM_PERIOD, flags);
 475 }
 476
 477 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
 478 /* ----- END glibc-2.1.2 posix/fnmatch.c */
 479
 480 #else   /* HAVE_FNMATCH */
 481 void fnmatch_dummy(void) {}
 482 #endif