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 1.4 2003/11/12 20:21:23 eirikn 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(pattern, string, flags) 62 const char *pattern, *string; 63 int flags; 64 { 65 const char *stringstart; 66 char *newp; 67 char c, test; 68 69 for (stringstart = string;;) 70 switch (c = *pattern++) { 71 case EOS: 72 if ((flags & FNM_LEADING_DIR) && *string == '/') 73 return (0); 74 return (*string == EOS ? 0 : FNM_NOMATCH); 75 case '?': 76 if (*string == EOS) 77 return (FNM_NOMATCH); 78 if (*string == '/' && (flags & FNM_PATHNAME)) 79 return (FNM_NOMATCH); 80 if (*string == '.' && (flags & FNM_PERIOD) && 81 (string == stringstart || 82 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 83 return (FNM_NOMATCH); 84 ++string; 85 break; 86 case '*': 87 c = *pattern; 88 /* Collapse multiple stars. */ 89 while (c == '*') 90 c = *++pattern; 91 92 if (*string == '.' && (flags & FNM_PERIOD) && 93 (string == stringstart || 94 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 95 return (FNM_NOMATCH); 96 97 /* Optimize for pattern with * at end or before /. */ 98 if (c == EOS) 99 if (flags & FNM_PATHNAME) 100 return ((flags & FNM_LEADING_DIR) || 101 strchr(string, '/') == NULL ? 102 0 : FNM_NOMATCH); 103 else 104 return (0); 105 else if (c == '/' && flags & FNM_PATHNAME) { 106 if ((string = strchr(string, '/')) == NULL) 107 return (FNM_NOMATCH); 108 break; 109 } 110 111 /* General case, use recursion. */ 112 while ((test = *string) != EOS) { 113 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 114 return (0); 115 if (test == '/' && flags & FNM_PATHNAME) 116 break; 117 ++string; 118 } 119 return (FNM_NOMATCH); 120 case '[': 121 if (*string == EOS) 122 return (FNM_NOMATCH); 123 if (*string == '/' && (flags & FNM_PATHNAME)) 124 return (FNM_NOMATCH); 125 if (*string == '.' && (flags & FNM_PERIOD) && 126 (string == stringstart || 127 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 128 return (FNM_NOMATCH); 129 130 switch (rangematch(pattern, *string, flags, &newp)) { 131 case RANGE_ERROR: 132 goto norm; 133 case RANGE_MATCH: 134 pattern = newp; 135 break; 136 case RANGE_NOMATCH: 137 return (FNM_NOMATCH); 138 } 139 ++string; 140 break; 141 case '\\': 142 if (!(flags & FNM_NOESCAPE)) { 143 if ((c = *pattern++) == EOS) { 144 c = '\\'; 145 --pattern; 146 } 147 } 148 /* FALLTHROUGH */ 149 default: 150 norm: 151 if (c == *string) 152 ; 153 else if ((flags & FNM_CASEFOLD) && 154 (tolower((unsigned char)c) == 155 tolower((unsigned char)*string))) 156 ; 157 else 158 return (FNM_NOMATCH); 159 string++; 160 break; 161 } 162 /* NOTREACHED */ 163 } 164 165 static int 166 rangematch(pattern, test, flags, newp) 167 const char *pattern; 168 char test; 169 int flags; 170 char **newp; 171 { 172 int negate, ok; 173 char c, c2; 174 175 /* 176 * A bracket expression starting with an unquoted circumflex 177 * character produces unspecified results (IEEE 1003.2-1992, 178 * 3.13.2). This implementation treats it like '!', for 179 * consistency with the regular expression syntax. 180 * J.T. Conklin (conklin@ngai.kaleida.com) 181 */ 182 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 183 ++pattern; 184 185 if (flags & FNM_CASEFOLD) 186 test = tolower((unsigned char)test); 187 188 /* 189 * A right bracket shall lose its special meaning and represent 190 * itself in a bracket expression if it occurs first in the list. 191 * -- POSIX.2 2.8.3.2 192 */ 193 ok = 0; 194 c = *pattern++; 195 do { 196 if (c == '\\' && !(flags & FNM_NOESCAPE)) 197 c = *pattern++; 198 if (c == EOS) 199 return (RANGE_ERROR); 200 201 if (c == '/' && (flags & FNM_PATHNAME)) 202 return (RANGE_NOMATCH); 203 204 if (flags & FNM_CASEFOLD) 205 c = tolower((unsigned char)c); 206 207 if (*pattern == '-' 208 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 209 pattern += 2; 210 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 211 c2 = *pattern++; 212 if (c2 == EOS) 213 return (RANGE_ERROR); 214 215 if (flags & FNM_CASEFOLD) 216 c2 = tolower((unsigned char)c2); 217 218 if (__collate_load_error ? 219 c <= test && test <= c2 : 220 __collate_range_cmp(c, test) <= 0 221 && __collate_range_cmp(test, c2) <= 0 222 ) 223 ok = 1; 224 } else if (c == test) 225 ok = 1; 226 } while ((c = *pattern++) != ']'); 227 228 *newp = (char *)pattern; 229 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 230 } 231