fnmatch.c revision 24632
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 37#if defined(LIBC_SCCS) && !defined(lint) 38static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 39#endif /* LIBC_SCCS and not lint */ 40 41/* 42 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 43 * Compares a filename or pathname to a pattern. 44 */ 45 46#include <ctype.h> 47#include <fnmatch.h> 48#include <string.h> 49#include <stdio.h> 50 51#include "collate.h" 52 53#define EOS '\0' 54 55static const char *rangematch __P((const char *, char, int)); 56 57int 58fnmatch(pattern, string, flags) 59 const char *pattern, *string; 60 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 (strchr(string, '/') == NULL ? 97 0 : FNM_NOMATCH); 98 else 99 return (0); 100 else if (c == '/' && flags & FNM_PATHNAME) { 101 if ((string = strchr(string, '/')) == NULL) 102 return (FNM_NOMATCH); 103 break; 104 } 105 106 /* General case, use recursion. */ 107 while ((test = *string) != EOS) { 108 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 109 return (0); 110 if (test == '/' && flags & FNM_PATHNAME) 111 break; 112 ++string; 113 } 114 return (FNM_NOMATCH); 115 case '[': 116 if (*string == EOS) 117 return (FNM_NOMATCH); 118 if (*string == '/' && flags & FNM_PATHNAME) 119 return (FNM_NOMATCH); 120 if ((pattern = 121 rangematch(pattern, *string, flags)) == NULL) 122 return (FNM_NOMATCH); 123 ++string; 124 break; 125 case '\\': 126 if (!(flags & FNM_NOESCAPE)) { 127 if ((c = *pattern++) == EOS) { 128 c = '\\'; 129 --pattern; 130 } 131 } 132 /* FALLTHROUGH */ 133 default: 134 if (c == *string) 135 ; 136 else if ((flags & FNM_CASEFOLD) && 137 (tolower((unsigned char)c) == 138 tolower((unsigned char)*string))) 139 ; 140 else 141 return (FNM_NOMATCH); 142 string++; 143 break; 144 } 145 /* NOTREACHED */ 146} 147 148static const char * 149rangematch(pattern, test, flags) 150 const char *pattern; 151 char test; 152 int flags; 153{ 154 int negate, ok; 155 char c, c2; 156 157 /* 158 * A bracket expression starting with an unquoted circumflex 159 * character produces unspecified results (IEEE 1003.2-1992, 160 * 3.13.2). This implementation treats it like '!', for 161 * consistency with the regular expression syntax. 162 * J.T. Conklin (conklin@ngai.kaleida.com) 163 */ 164 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 165 ++pattern; 166 167 if (flags & FNM_CASEFOLD) 168 test = tolower((unsigned char)test); 169 170 for (ok = 0; (c = *pattern++) != ']';) { 171 if (c == '\\' && !(flags & FNM_NOESCAPE)) 172 c = *pattern++; 173 if (c == EOS) 174 return (NULL); 175 176 if (flags & FNM_CASEFOLD) 177 c = tolower((unsigned char)c); 178 179 if (*pattern == '-' 180 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 181 pattern += 2; 182 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 183 c2 = *pattern++; 184 if (c2 == EOS) 185 return (NULL); 186 187 if (flags & FNM_CASEFOLD) 188 c2 = tolower((unsigned char)c2); 189 190 if (__collate_load_error ? 191 c <= test && test <= c2 : 192 __collate_range_cmp(c, test) <= 0 193 && __collate_range_cmp(test, c2) <= 0 194 ) 195 ok = 1; 196 } else if (c == test) 197 ok = 1; 198 } 199 return (ok == negate ? NULL : pattern); 200} 201