fnmatch.c revision 25269
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 ((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 142 return (FNM_NOMATCH); 143 string++; 144 break; 145 } 146 /* NOTREACHED */ 147} 148 149static const char * 150rangematch(pattern, test, flags) 151 const char *pattern; 152 char test; 153 int flags; 154{ 155 int negate, ok; 156 char c, c2; 157 158 /* 159 * A bracket expression starting with an unquoted circumflex 160 * character produces unspecified results (IEEE 1003.2-1992, 161 * 3.13.2). This implementation treats it like '!', for 162 * consistency with the regular expression syntax. 163 * J.T. Conklin (conklin@ngai.kaleida.com) 164 */ 165 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 166 ++pattern; 167 168 if (flags & FNM_CASEFOLD) 169 test = tolower((unsigned char)test); 170 171 for (ok = 0; (c = *pattern++) != ']';) { 172 if (c == '\\' && !(flags & FNM_NOESCAPE)) 173 c = *pattern++; 174 if (c == EOS) 175 return (NULL); 176 177 if (flags & FNM_CASEFOLD) 178 c = tolower((unsigned char)c); 179 180 if (*pattern == '-' 181 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 182 pattern += 2; 183 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 184 c2 = *pattern++; 185 if (c2 == EOS) 186 return (NULL); 187 188 if (flags & FNM_CASEFOLD) 189 c2 = tolower((unsigned char)c2); 190 191 if (__collate_load_error ? 192 c <= test && test <= c2 : 193 __collate_range_cmp(c, test) <= 0 194 && __collate_range_cmp(test, c2) <= 0 195 ) 196 ok = 1; 197 } else if (c == test) 198 ok = 1; 199 } 200 return (ok == negate ? NULL : pattern); 201} 202