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 * @(#)fnmatch.c 8.2 (Berkeley) 4/16/94 37 * $DragonFly: src/lib/libc/gen/fnmatch.c,v 1.6 2005/11/13 00:07:42 swildner Exp $ 38 */ 39 40 /* 41 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 42 * Compares a filename or pathname to a pattern. 43 */ 44 45 #include <ctype.h> 46 #include <fnmatch.h> 47 #include <string.h> 48 #include <stdio.h> 49 50 #include "collate.h" 51 52 #define EOS '\0' 53 54 #define RANGE_MATCH 1 55 #define RANGE_NOMATCH 0 56 #define RANGE_ERROR (-1) 57 58 static int rangematch (const char *, char, int, char **); 59 60 int 61 fnmatch(const char *pattern, const char *string, int flags) 62 { 63 const char *stringstart; 64 char *newp; 65 char c, test; 66 67 for (stringstart = string;;) 68 switch (c = *pattern++) { 69 case EOS: 70 if ((flags & FNM_LEADING_DIR) && *string == '/') 71 return (0); 72 return (*string == EOS ? 0 : FNM_NOMATCH); 73 case '?': 74 if (*string == EOS) 75 return (FNM_NOMATCH); 76 if (*string == '/' && (flags & FNM_PATHNAME)) 77 return (FNM_NOMATCH); 78 if (*string == '.' && (flags & FNM_PERIOD) && 79 (string == stringstart || 80 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 81 return (FNM_NOMATCH); 82 ++string; 83 break; 84 case '*': 85 c = *pattern; 86 /* Collapse multiple stars. */ 87 while (c == '*') 88 c = *++pattern; 89 90 if (*string == '.' && (flags & FNM_PERIOD) && 91 (string == stringstart || 92 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 93 return (FNM_NOMATCH); 94 95 /* Optimize for pattern with * at end or before /. */ 96 if (c == EOS) 97 if (flags & FNM_PATHNAME) 98 return ((flags & FNM_LEADING_DIR) || 99 strchr(string, '/') == NULL ? 100 0 : FNM_NOMATCH); 101 else 102 return (0); 103 else if (c == '/' && flags & FNM_PATHNAME) { 104 if ((string = strchr(string, '/')) == NULL) 105 return (FNM_NOMATCH); 106 break; 107 } 108 109 /* General case, use recursion. */ 110 while ((test = *string) != EOS) { 111 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 112 return (0); 113 if (test == '/' && flags & FNM_PATHNAME) 114 break; 115 ++string; 116 } 117 return (FNM_NOMATCH); 118 case '[': 119 if (*string == EOS) 120 return (FNM_NOMATCH); 121 if (*string == '/' && (flags & FNM_PATHNAME)) 122 return (FNM_NOMATCH); 123 if (*string == '.' && (flags & FNM_PERIOD) && 124 (string == stringstart || 125 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 126 return (FNM_NOMATCH); 127 128 switch (rangematch(pattern, *string, flags, &newp)) { 129 case RANGE_ERROR: 130 goto norm; 131 case RANGE_MATCH: 132 pattern = newp; 133 break; 134 case RANGE_NOMATCH: 135 return (FNM_NOMATCH); 136 } 137 ++string; 138 break; 139 case '\\': 140 if (!(flags & FNM_NOESCAPE)) { 141 if ((c = *pattern++) == EOS) { 142 c = '\\'; 143 --pattern; 144 } 145 } 146 /* FALLTHROUGH */ 147 default: 148 norm: 149 if (c == *string) 150 ; 151 else if ((flags & FNM_CASEFOLD) && 152 (tolower((unsigned char)c) == 153 tolower((unsigned char)*string))) 154 ; 155 else 156 return (FNM_NOMATCH); 157 string++; 158 break; 159 } 160 /* NOTREACHED */ 161 } 162 163 static int 164 rangematch(const char *pattern, char test, int flags, char **newp) 165 { 166 int negate, ok; 167 char c, c2; 168 169 /* 170 * A bracket expression starting with an unquoted circumflex 171 * character produces unspecified results (IEEE 1003.2-1992, 172 * 3.13.2). This implementation treats it like '!', for 173 * consistency with the regular expression syntax. 174 * J.T. Conklin (conklin@ngai.kaleida.com) 175 */ 176 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 177 ++pattern; 178 179 if (flags & FNM_CASEFOLD) 180 test = tolower((unsigned char)test); 181 182 /* 183 * A right bracket shall lose its special meaning and represent 184 * itself in a bracket expression if it occurs first in the list. 185 * -- POSIX.2 2.8.3.2 186 */ 187 ok = 0; 188 c = *pattern++; 189 do { 190 if (c == '\\' && !(flags & FNM_NOESCAPE)) 191 c = *pattern++; 192 if (c == EOS) 193 return (RANGE_ERROR); 194 195 if (c == '/' && (flags & FNM_PATHNAME)) 196 return (RANGE_NOMATCH); 197 198 if (flags & FNM_CASEFOLD) 199 c = tolower((unsigned char)c); 200 201 if (*pattern == '-' 202 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 203 pattern += 2; 204 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 205 c2 = *pattern++; 206 if (c2 == EOS) 207 return (RANGE_ERROR); 208 209 if (flags & FNM_CASEFOLD) 210 c2 = tolower((unsigned char)c2); 211 212 if (__collate_load_error ? 213 c <= test && test <= c2 : 214 __collate_range_cmp(c, test) <= 0 215 && __collate_range_cmp(test, c2) <= 0 216 ) 217 ok = 1; 218 } else if (c == test) 219 ok = 1; 220 } while ((c = *pattern++) != ']'); 221 222 *newp = __DECONST(char *, pattern); 223 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 224 } 225