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/contrib/cvs/lib/fnmatch.c

https://bitbucket.org/freebsd/freebsd-head/
C | 181 lines | 125 code | 31 blank | 25 comment | 99 complexity | 4d0bb9042b3e64405e0478564b73dbd2 MD5 | raw file
  1/* Copyright (C) 1992 Free Software Foundation, Inc.
  2This file is part of the GNU C Library.
  3
  4The GNU C Library is free software; you can redistribute it and/or
  5modify it under the terms of the GNU Library General Public License as
  6published by the Free Software Foundation; either version 2 of the
  7License, or (at your option) any later version.
  8
  9The GNU C Library is distributed in the hope that it will be useful,
 10but WITHOUT ANY WARRANTY; without even the implied warranty of
 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 12Library General Public License for more details.  */
 13
 14/* Modified slightly by Brian Berliner <berliner@sun.com> and
 15   Jim Blandy <jimb@cyclic.com> for CVS use */
 16
 17#ifdef HAVE_CONFIG_H
 18# include "config.h"
 19#endif
 20
 21#include "system.h"
 22
 23/* IGNORE(@ */
 24/* #include <ansidecl.h> */
 25/* @) */
 26#include <errno.h>
 27#include "fnmatch.h"
 28
 29#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
 30extern int errno;
 31#endif
 32
 33/* Match STRING against the filename pattern PATTERN, returning zero if
 34   it matches, nonzero if not.  */
 35int
 36#if __STDC__
 37fnmatch (const char *pattern, const char *string, int flags)
 38#else
 39fnmatch (pattern, string, flags)
 40    char *pattern;
 41    char *string;
 42    int flags;
 43#endif
 44{
 45  register const char *p = pattern, *n = string;
 46  register char c;
 47
 48  if ((flags & ~__FNM_FLAGS) != 0)
 49    {
 50      errno = EINVAL;
 51      return -1;
 52    }
 53
 54  while ((c = *p++) != '\0')
 55    {
 56      switch (c)
 57	{
 58	case '?':
 59	  if (*n == '\0')
 60	    return FNM_NOMATCH;
 61	  else if ((flags & FNM_PATHNAME) && *n == '/')
 62	    return FNM_NOMATCH;
 63	  else if ((flags & FNM_PERIOD) && *n == '.' &&
 64		   (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
 65	    return FNM_NOMATCH;
 66	  break;
 67	  
 68	case '\\':
 69	  if (!(flags & FNM_NOESCAPE))
 70	    c = *p++;
 71	  if (FOLD_FN_CHAR (*n) != FOLD_FN_CHAR (c))
 72	    return FNM_NOMATCH;
 73	  break;
 74	  
 75	case '*':
 76	  if ((flags & FNM_PERIOD) && *n == '.' &&
 77	      (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
 78	    return FNM_NOMATCH;
 79	  
 80	  for (c = *p++; c == '?' || c == '*'; c = *p++, ++n)
 81	    if (((flags & FNM_PATHNAME) && *n == '/') ||
 82		(c == '?' && *n == '\0'))
 83	      return FNM_NOMATCH;
 84	  
 85	  if (c == '\0')
 86	    return 0;
 87	  
 88	  {
 89	    char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
 90	    for (--p; *n != '\0'; ++n)
 91	      if ((c == '[' || FOLD_FN_CHAR (*n) == FOLD_FN_CHAR (c1)) &&
 92		  fnmatch(p, n, flags & ~FNM_PERIOD) == 0)
 93		return 0;
 94	    return FNM_NOMATCH;
 95	  }
 96	  
 97	case '[':
 98	  {
 99	    /* Nonzero if the sense of the character class is inverted.  */
100	    register int not;
101	    
102	    if (*n == '\0')
103	      return FNM_NOMATCH;
104	    
105	    if ((flags & FNM_PERIOD) && *n == '.' &&
106		(n == string || ((flags & FNM_PATHNAME) && n[-1] == '/')))
107	      return FNM_NOMATCH;
108	    
109	    not = (*p == '!' || *p == '^');
110	    if (not)
111	      ++p;
112	    
113	    c = *p++;
114	    for (;;)
115	      {
116		register char cstart = c, cend = c;
117		
118		if (!(flags & FNM_NOESCAPE) && c == '\\')
119		  cstart = cend = *p++;
120		
121		if (c == '\0')
122		  /* [ (unterminated) loses.  */
123		  return FNM_NOMATCH;
124		
125		c = *p++;
126		
127		if ((flags & FNM_PATHNAME) && c == '/')
128		  /* [/] can never match.  */
129		  return FNM_NOMATCH;
130		
131		if (c == '-' && *p != ']')
132		  {
133		    cend = *p++;
134		    if (!(flags & FNM_NOESCAPE) && cend == '\\')
135		      cend = *p++;
136		    if (cend == '\0')
137		      return FNM_NOMATCH;
138		    c = *p++;
139		  }
140		
141		if (*n >= cstart && *n <= cend)
142		  goto matched;
143		
144		if (c == ']')
145		  break;
146	      }
147	    if (!not)
148	      return FNM_NOMATCH;
149	    break;
150	    
151	  matched:;
152	    /* Skip the rest of the [...] that already matched.  */
153	    while (c != ']')
154	      {
155		if (c == '\0')
156		  /* [... (unterminated) loses.  */
157		  return FNM_NOMATCH;
158		
159		c = *p++;
160		if (!(flags & FNM_NOESCAPE) && c == '\\')
161		  /* 1003.2d11 is unclear if this is right.  %%% */
162		  ++p;
163	      }
164	    if (not)
165	      return FNM_NOMATCH;
166	  }
167	  break;
168	  
169	default:
170	  if (FOLD_FN_CHAR (c) != FOLD_FN_CHAR (*n))
171	    return FNM_NOMATCH;
172	}
173      
174      ++n;
175    }
176
177  if (*n == '\0')
178    return 0;
179
180  return FNM_NOMATCH;
181}