fnmatch.c revision 156230
1/* 2 * Copyright (c) 1989, 1993, 1994 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 * From FreeBSD fnmatch.c 1.11 37 * $Id: fnmatch.c,v 1.3 1997/08/19 02:34:30 jdp Exp $ 38 */ 39 40#if defined(LIBC_SCCS) && !defined(lint) 41static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 42#endif /* LIBC_SCCS and not lint */ 43 44/* 45 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 46 * Compares a filename or pathname to a pattern. 47 */ 48 49#include <ctype.h> 50#include <string.h> 51#include <stdio.h> 52 53#include "fnmatch.h" 54 55#define EOS '\0' 56 57static const char *rangematch(const char *, char, int); 58 59int 60fnmatch(const char *pattern, const char *string, int flags) 61{ 62 const char *stringstart; 63 char c, test; 64 65 for (stringstart = string;;) 66 switch (c = *pattern++) { 67 case EOS: 68 if ((flags & FNM_LEADING_DIR) && *string == '/') 69 return (0); 70 return (*string == EOS ? 0 : FNM_NOMATCH); 71 case '?': 72 if (*string == EOS) 73 return (FNM_NOMATCH); 74 if (*string == '/' && (flags & FNM_PATHNAME)) 75 return (FNM_NOMATCH); 76 if (*string == '.' && (flags & FNM_PERIOD) && 77 (string == stringstart || 78 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 79 return (FNM_NOMATCH); 80 ++string; 81 break; 82 case '*': 83 c = *pattern; 84 /* Collapse multiple stars. */ 85 while (c == '*') 86 c = *++pattern; 87 88 if (*string == '.' && (flags & FNM_PERIOD) && 89 (string == stringstart || 90 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 91 return (FNM_NOMATCH); 92 93 /* Optimize for pattern with * at end or before /. */ 94 if (c == EOS) 95 if (flags & FNM_PATHNAME) 96 return ((flags & FNM_LEADING_DIR) || 97 strchr(string, '/') == NULL ? 98 0 : FNM_NOMATCH); 99 else 100 return (0); 101 else if (c == '/' && flags & FNM_PATHNAME) { 102 if ((string = strchr(string, '/')) == NULL) 103 return (FNM_NOMATCH); 104 break; 105 } 106 107 /* General case, use recursion. */ 108 while ((test = *string) != EOS) { 109 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 110 return (0); 111 if (test == '/' && flags & FNM_PATHNAME) 112 break; 113 ++string; 114 } 115 return (FNM_NOMATCH); 116 case '[': 117 if (*string == EOS) 118 return (FNM_NOMATCH); 119 if (*string == '/' && flags & FNM_PATHNAME) 120 return (FNM_NOMATCH); 121 if ((pattern = 122 rangematch(pattern, *string, flags)) == NULL) 123 return (FNM_NOMATCH); 124 ++string; 125 break; 126 case '\\': 127 if (!(flags & FNM_NOESCAPE)) { 128 if ((c = *pattern++) == EOS) { 129 c = '\\'; 130 --pattern; 131 } 132 } 133 /* FALLTHROUGH */ 134 default: 135 if (c == *string) 136 ; 137 else if ((flags & FNM_CASEFOLD) && 138 (tolower((unsigned char)c) == 139 tolower((unsigned char)*string))) 140 ; 141 else if ((flags & FNM_PREFIX_DIRS) && *string == EOS && 142 ((c == '/' && string != stringstart) || 143 (string == stringstart+1 && *stringstart == '/'))) 144 return (0); 145 else 146 return (FNM_NOMATCH); 147 string++; 148 break; 149 } 150 /* NOTREACHED */ 151} 152 153static const char * 154rangematch(const char *pattern, char test, int flags) 155{ 156 int negate, ok; 157 char c, c2; 158 159 /* 160 * A bracket expression starting with an unquoted circumflex 161 * character produces unspecified results (IEEE 1003.2-1992, 162 * 3.13.2). This implementation treats it like '!', for 163 * consistency with the regular expression syntax. 164 * J.T. Conklin (conklin@ngai.kaleida.com) 165 */ 166 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 167 ++pattern; 168 169 if (flags & FNM_CASEFOLD) 170 test = tolower((unsigned char)test); 171 172 for (ok = 0; (c = *pattern++) != ']';) { 173 if (c == '\\' && !(flags & FNM_NOESCAPE)) 174 c = *pattern++; 175 if (c == EOS) 176 return (NULL); 177 178 if (flags & FNM_CASEFOLD) 179 c = tolower((unsigned char)c); 180 181 if (*pattern == '-' 182 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 183 pattern += 2; 184 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 185 c2 = *pattern++; 186 if (c2 == EOS) 187 return (NULL); 188 189 if (flags & FNM_CASEFOLD) 190 c2 = tolower((unsigned char)c2); 191 192 if ((unsigned char)c <= (unsigned char)test && 193 (unsigned char)test <= (unsigned char)c2) 194 ok = 1; 195 } else if (c == test) 196 ok = 1; 197 } 198 return (ok == negate ? NULL : pattern); 199} 200