1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Guido van Rossum. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 /* from: static char sccsid[] = "@(#)fnmatch.c 8.1 (Berkeley) 6/4/93"; */ 39 static char *rcsid = "$Id: fnmatch.c,v 1.10 1993/11/24 19:43:51 jtc Exp $"; 40 #endif /* LIBC_SCCS and not lint */ 41 42 /* 43 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 44 * Compares a filename or pathname to a pattern. 45 */ 46 47 #include <fnmatch.h> 48 #include <string.h> 49 50 #define EOS '\0' 51 52 static const char *rangematch __P((const char *, int, int)); 53 54 int 55 fnmatch(pattern, string, flags) 56 register const char *pattern, *string; 57 int flags; 58 { 59 const char *stringstart = string; 60 register char c; 61 char test; 62 63 for (;;) 64 switch (c = *pattern++) { 65 case EOS: 66 return (*string == EOS ? 0 : FNM_NOMATCH); 67 case '?': 68 if (*string == EOS) 69 return (FNM_NOMATCH); 70 if (*string == '/' && (flags & FNM_PATHNAME)) 71 return (FNM_NOMATCH); 72 if (*string == '.' && (flags & FNM_PERIOD) && 73 (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 74 return (FNM_NOMATCH); 75 ++string; 76 break; 77 case '*': 78 c = *pattern; 79 /* Collapse multiple stars. */ 80 while (c == '*') 81 c = *++pattern; 82 83 if (*string == '.' && (flags & FNM_PERIOD) && 84 (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 85 return (FNM_NOMATCH); 86 87 /* Optimize for pattern with * at end or before /. */ 88 if (c == EOS) 89 if (flags & FNM_PATHNAME) 90 return (strchr(string, '/') == NULL ? 91 0 : FNM_NOMATCH); 92 else 93 return (0); 94 else if (c == '/' && flags & FNM_PATHNAME) { 95 if ((string = strchr(string, '/')) == NULL) 96 return (FNM_NOMATCH); 97 break; 98 } 99 100 /* General case, use recursion. */ 101 while ((test = *string) != EOS) { 102 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 103 return (0); 104 if (test == '/' && flags & FNM_PATHNAME) 105 break; 106 ++string; 107 } 108 return (FNM_NOMATCH); 109 case '[': 110 if (*string == EOS) 111 return (FNM_NOMATCH); 112 if (*string == '/' && flags & FNM_PATHNAME) 113 return (FNM_NOMATCH); 114 if ((pattern = rangematch(pattern, *string, flags)) == NULL) 115 return (FNM_NOMATCH); 116 ++string; 117 break; 118 case '\\': 119 if (!(flags & FNM_NOESCAPE)) { 120 if ((c = *pattern++) == EOS) { 121 c = '\\'; 122 --pattern; 123 } 124 } 125 /* FALLTHROUGH */ 126 default: 127 if (c != *string++) 128 return (FNM_NOMATCH); 129 break; 130 } 131 /* NOTREACHED */ 132 } 133 134 static const char * 135 rangematch(pattern, test, flags) 136 register const char *pattern; 137 register int test; 138 int flags; 139 { 140 register char c, c2; 141 int negate, ok; 142 143 /* A bracket expression starting with an unquoted circumflex 144 * character produces unspecified results (IEEE 1003.2-1992, 145 * 3.13.2). I have chosen to treat it like '!', for 146 * consistancy with regular expression syntax. 147 */ 148 if (negate = (*pattern == '!' || *pattern == '^')) { 149 pattern++; 150 } 151 152 for (ok = 0; (c = *pattern++) != ']';) { 153 if (c == '\\' && !(flags & FNM_NOESCAPE)) { 154 c = *pattern++; 155 } 156 if (c == EOS) { 157 return (NULL); 158 } 159 160 if (*pattern == '-' 161 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 162 pattern += 2; 163 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) { 164 c2 = *pattern++; 165 } 166 if (c2 == EOS) { 167 return (NULL); 168 } 169 170 if (c <= test && test <= c2) { 171 ok = 1; 172 } 173 } else if (c == test) { 174 ok = 1; 175 } 176 } 177 178 return (ok == negate ? NULL : pattern); 179 } 180