CMakeLua/Utilities/cmtar/compat/fnmatch.c

   1 /*  $OpenBSD: fnmatch.c,v 1.6 1998/03/19 00:29:59 millert Exp $  */
   2
   3 /*
   4  * Copyright (c) 1989, 1993, 1994
   5  *  The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Guido van Rossum.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *  This product includes software developed by the University of
  21  *  California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #if defined(LIBC_SCCS) && !defined(lint)
  40 #if 0
  41 static char sccsid[] = "@(#)fnmatch.c  8.2 (Berkeley) 4/16/94";
  42 #else
  43 static char rcsid[] = "$OpenBSD: fnmatch.c,v 1.6 1998/03/19 00:29:59 millert Exp $";
  44 #endif
  45 #endif /* LIBC_SCCS and not lint */
  46
  47 /*
  48  * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
  49  * Compares a filename or pathname to a pattern.
  50  */
  51
  52 #include <libtar/config.h>
  53
  54 #include <stdio.h>
  55
  56 #ifdef STDC_HEADERS
  57 # include <string.h>
  58 #endif
  59
  60 #ifdef HAVE_CTYPE_H
  61 # include <ctype.h>
  62 #endif
  63
  64 #include <libtar/compat.h>
  65
  66
  67 #define  EOS  '\0'
  68
  69 #define  RANGE_MATCH  1
  70 #define  RANGE_NOMATCH  0
  71 #define  RANGE_ERROR  (-1)
  72
  73 static int rangematch (const char *, char, int, char **);
  74
  75 int
  76 fnmatch(pattern, string, flags)
  77   const char *pattern, *string;
  78   int flags;
  79 {
  80   const char *stringstart;
  81   char *newp;
  82   char c, test;
  83
  84   for (stringstart = string;;)
  85     switch (c = *pattern++) {
  86     case EOS:
  87       if ((flags & FNM_LEADING_DIR) && *string == '/')
  88         return (0);
  89       return (*string == EOS ? 0 : FNM_NOMATCH);
  90     case '?':
  91       if (*string == EOS)
  92         return (FNM_NOMATCH);
  93       if (*string == '/' && (flags & FNM_PATHNAME))
  94         return (FNM_NOMATCH);
  95       if (*string == '.' && (flags & FNM_PERIOD) &&
  96           (string == stringstart ||
  97           ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
  98         return (FNM_NOMATCH);
  99       ++string;
 100       break;
 101     case '*':
 102       c = *pattern;
 103       /* Collapse multiple stars. */
 104       while (c == '*')
 105         c = *++pattern;
 106
 107       if (*string == '.' && (flags & FNM_PERIOD) &&
 108           (string == stringstart ||
 109           ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
 110         return (FNM_NOMATCH);
 111
 112       /* Optimize for pattern with * at end or before /. */
 113       if (c == EOS) {
 114         if (flags & FNM_PATHNAME)
 115           return ((flags & FNM_LEADING_DIR) ||
 116               strchr(string, '/') == NULL ?
 117               0 : FNM_NOMATCH);
 118         else
 119           return (0);
 120       } else if (c == '/' && (flags & FNM_PATHNAME)) {
 121         if ((string = strchr(string, '/')) == NULL)
 122           return (FNM_NOMATCH);
 123         break;
 124       }
 125
 126       /* General case, use recursion. */
 127       while ((test = *string) != EOS) {
 128         if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
 129           return (0);
 130         if (test == '/' && (flags & FNM_PATHNAME))
 131           break;
 132         ++string;
 133       }
 134       return (FNM_NOMATCH);
 135     case '[':
 136       if (*string == EOS)
 137         return (FNM_NOMATCH);
 138       if (*string == '/' && (flags & FNM_PATHNAME))
 139         return (FNM_NOMATCH);
 140       if (*string == '.' && (flags & FNM_PERIOD) &&
 141           (string == stringstart ||
 142           ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
 143         return (FNM_NOMATCH);
 144
 145       switch (rangematch(pattern, *string, flags, &newp)) {
 146       case RANGE_ERROR:
 147         /* not a good range, treat as normal text */
 148         goto normal;
 149       case RANGE_MATCH:
 150         pattern = newp;
 151         break;
 152       case RANGE_NOMATCH:
 153         return (FNM_NOMATCH);
 154       }
 155       ++string;
 156       break;
 157     case '\\':
 158       if (!(flags & FNM_NOESCAPE)) {
 159         if ((c = *pattern++) == EOS) {
 160           c = '\\';
 161           --pattern;
 162         }
 163       }
 164       /* FALLTHROUGH */
 165     default:
 166     normal:
 167       if (c != *string && !((flags & FNM_CASEFOLD) &&
 168          (tolower((unsigned char)c) ==
 169          tolower((unsigned char)*string))))
 170         return (FNM_NOMATCH);
 171       ++string;
 172       break;
 173     }
 174   /* NOTREACHED */
 175 }
 176
 177 static int
 178 rangematch(pattern, test, flags, newp)
 179   const char *pattern;
 180   char test;
 181   int flags;
 182   char **newp;
 183 {
 184   int negate, ok;
 185   char c, c2;
 186
 187   /*
 188    * A bracket expression starting with an unquoted circumflex
 189    * character produces unspecified results (IEEE 1003.2-1992,
 190    * 3.13.2).  This implementation treats it like '!', for
 191    * consistency with the regular expression syntax.
 192    * J.T. Conklin (conklin@ngai.kaleida.com)
 193    */
 194   negate = (*pattern == '!' || *pattern == '^');
 195   if (negate)
 196     ++pattern;
 197
 198   if (flags & FNM_CASEFOLD)
 199     test = tolower((unsigned char)test);
 200
 201   /*
 202    * A right bracket shall lose its special meaning and represent
 203    * itself in a bracket expression if it occurs first in the list.
 204    * -- POSIX.2 2.8.3.2
 205    */
 206   ok = 0;
 207   c = *pattern++;
 208   do {
 209     if (c == '\\' && !(flags & FNM_NOESCAPE))
 210       c = *pattern++;
 211     if (c == EOS)
 212       return (RANGE_ERROR);
 213     if (c == '/' && (flags & FNM_PATHNAME))
 214       return (RANGE_NOMATCH);
 215     if ((flags & FNM_CASEFOLD))
 216       c = tolower((unsigned char)c);
 217     if (*pattern == '-'
 218         && (c2 = *(pattern+1)) != EOS && c2 != ']') {
 219       pattern += 2;
 220       if (c2 == '\\' && !(flags & FNM_NOESCAPE))
 221         c2 = *pattern++;
 222       if (c2 == EOS)
 223         return (RANGE_ERROR);
 224       if (flags & FNM_CASEFOLD)
 225         c2 = tolower((unsigned char)c2);
 226       if (c <= test && test <= c2)
 227         ok = 1;
 228     } else if (c == test)
 229       ok = 1;
 230   } while ((c = *pattern++) != ']');
 231
 232   *newp = (char *)pattern;
 233   return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
 234 }