fnmatch.c revision 26492
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 55#define RANGE_MATCH 1 56#define RANGE_NOMATCH 0 57#define RANGE_ERROR (-1) 58 59static int rangematch __P((const char *, char, int, char **)); 60 61int 62fnmatch(pattern, string, flags) 63 const char *pattern, *string; 64 int flags; 65{ 66 const char *stringstart; 67 char *newp; 68 char c, test; 69 70 for (stringstart = string;;) 71 switch (c = *pattern++) { 72 case EOS: 73 if ((flags & FNM_LEADING_DIR) && *string == '/') 74 return (0); 75 return (*string == EOS ? 0 : FNM_NOMATCH); 76 case '?': 77 if (*string == EOS) 78 return (FNM_NOMATCH); 79 if (*string == '/' && (flags & FNM_PATHNAME)) 80 return (FNM_NOMATCH); 81 if (*string == '.' && (flags & FNM_PERIOD) && 82 (string == stringstart || 83 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 84 return (FNM_NOMATCH); 85 ++string; 86 break; 87 case '*': 88 c = *pattern; 89 /* Collapse multiple stars. */ 90 while (c == '*') 91 c = *++pattern; 92 93 if (*string == '.' && (flags & FNM_PERIOD) && 94 (string == stringstart || 95 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 96 return (FNM_NOMATCH); 97 98 /* Optimize for pattern with * at end or before /. */ 99 if (c == EOS) 100 if (flags & FNM_PATHNAME) 101 return ((flags & FNM_LEADING_DIR) || 102 strchr(string, '/') == NULL ? 103 0 : FNM_NOMATCH); 104 else 105 return (0); 106 else if (c == '/' && flags & FNM_PATHNAME) { 107 if ((string = strchr(string, '/')) == NULL) 108 return (FNM_NOMATCH); 109 break; 110 } 111 112 /* General case, use recursion. */ 113 while ((test = *string) != EOS) { 114 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 115 return (0); 116 if (test == '/' && flags & FNM_PATHNAME) 117 break; 118 ++string; 119 } 120 return (FNM_NOMATCH); 121 case '[': 122 if (*string == EOS) 123 return (FNM_NOMATCH); 124 if (*string == '/' && (flags & FNM_PATHNAME)) 125 return (FNM_NOMATCH); 126 if (*string == '.' && (flags & FNM_PERIOD) && 127 (string == stringstart || 128 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 129 return (FNM_NOMATCH); 130 131 switch (rangematch(pattern, *string, flags, &newp)) { 132 case RANGE_ERROR: 133 goto norm; 134 case RANGE_MATCH: 135 pattern = newp; 136 break; 137 case RANGE_NOMATCH: 138 return (FNM_NOMATCH); 139 } 140 ++string; 141 break; 142 case '\\': 143 if (!(flags & FNM_NOESCAPE)) { 144 if ((c = *pattern++) == EOS) { 145 c = '\\'; 146 --pattern; 147 } 148 } 149 /* FALLTHROUGH */ 150 default: 151 norm: 152 if (c == *string) 153 ; 154 else if ((flags & FNM_CASEFOLD) && 155 (tolower((unsigned char)c) == 156 tolower((unsigned char)*string))) 157 ; 158 else 159 return (FNM_NOMATCH); 160 string++; 161 break; 162 } 163 /* NOTREACHED */ 164} 165 166static int 167rangematch(pattern, test, flags, newp) 168 const char *pattern; 169 char test; 170 int flags; 171 char **newp; 172{ 173 int negate, ok; 174 char c, c2; 175 176 /* 177 * A bracket expression starting with an unquoted circumflex 178 * character produces unspecified results (IEEE 1003.2-1992, 179 * 3.13.2). This implementation treats it like '!', for 180 * consistency with the regular expression syntax. 181 * J.T. Conklin (conklin@ngai.kaleida.com) 182 */ 183 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 184 ++pattern; 185 186 if (flags & FNM_CASEFOLD) 187 test = tolower((unsigned char)test); 188 189 /* 190 * A right bracket shall lose its special meaning and represent 191 * itself in a bracket expression if it occurs first in the list. 192 * -- POSIX.2 2.8.3.2 193 */ 194 ok = 0; 195 c = *pattern++; 196 do { 197 if (c == '\\' && !(flags & FNM_NOESCAPE)) 198 c = *pattern++; 199 if (c == EOS) 200 return (RANGE_ERROR); 201 202 if (c == '/' && (flags & FNM_PATHNAME)) 203 return (RANGE_NOMATCH); 204 205 if (flags & FNM_CASEFOLD) 206 c = tolower((unsigned char)c); 207 208 if (*pattern == '-' 209 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 210 pattern += 2; 211 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 212 c2 = *pattern++; 213 if (c2 == EOS) 214 return (RANGE_ERROR); 215 216 if (flags & FNM_CASEFOLD) 217 c2 = tolower((unsigned char)c2); 218 219 if (__collate_load_error ? 220 c <= test && test <= c2 : 221 __collate_range_cmp(c, test) <= 0 222 && __collate_range_cmp(test, c2) <= 0 223 ) 224 ok = 1; 225 } else if (c == test) 226 ok = 1; 227 } while ((c = *pattern++) != ']'); 228 229 *newp = (char *)pattern; 230 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 231} 232