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 */ 38 39 /* 40 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 41 * Compares a filename or pathname to a pattern. 42 */ 43 44 #include <ctype.h> 45 #include <fnmatch.h> 46 #include <string.h> 47 #include <stdio.h> 48 49 #include "collate.h" 50 51 #define EOS '\0' 52 53 #define RANGE_MATCH 1 54 #define RANGE_NOMATCH 0 55 #define RANGE_ERROR (-1) 56 57 static int rangematch __P((const char *, char, int, char **)); 58 59 int 60 fnmatch(pattern, string, flags) 61 const char *pattern, *string; 62 int flags; 63 { 64 const char *stringstart; 65 char *newp; 66 char c, test; 67 68 for (stringstart = string;;) 69 switch (c = *pattern++) { 70 case EOS: 71 if ((flags & FNM_LEADING_DIR) && *string == '/') 72 return (0); 73 return (*string == EOS ? 0 : FNM_NOMATCH); 74 case '?': 75 if (*string == EOS) 76 return (FNM_NOMATCH); 77 if (*string == '/' && (flags & FNM_PATHNAME)) 78 return (FNM_NOMATCH); 79 if (*string == '.' && (flags & FNM_PERIOD) && 80 (string == stringstart || 81 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 82 return (FNM_NOMATCH); 83 ++string; 84 break; 85 case '*': 86 c = *pattern; 87 /* Collapse multiple stars. */ 88 while (c == '*') 89 c = *++pattern; 90 91 if (*string == '.' && (flags & FNM_PERIOD) && 92 (string == stringstart || 93 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 94 return (FNM_NOMATCH); 95 96 /* Optimize for pattern with * at end or before /. */ 97 if (c == EOS) 98 if (flags & FNM_PATHNAME) 99 return ((flags & FNM_LEADING_DIR) || 100 strchr(string, '/') == NULL ? 101 0 : FNM_NOMATCH); 102 else 103 return (0); 104 else if (c == '/' && flags & FNM_PATHNAME) { 105 if ((string = strchr(string, '/')) == NULL) 106 return (FNM_NOMATCH); 107 break; 108 } 109 110 /* General case, use recursion. */ 111 while ((test = *string) != EOS) { 112 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 113 return (0); 114 if (test == '/' && flags & FNM_PATHNAME) 115 break; 116 ++string; 117 } 118 return (FNM_NOMATCH); 119 case '[': 120 if (*string == EOS) 121 return (FNM_NOMATCH); 122 if (*string == '/' && (flags & FNM_PATHNAME)) 123 return (FNM_NOMATCH); 124 if (*string == '.' && (flags & FNM_PERIOD) && 125 (string == stringstart || 126 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 127 return (FNM_NOMATCH); 128 129 switch (rangematch(pattern, *string, flags, &newp)) { 130 case RANGE_ERROR: 131 goto norm; 132 case RANGE_MATCH: 133 pattern = newp; 134 break; 135 case RANGE_NOMATCH: 136 return (FNM_NOMATCH); 137 } 138 ++string; 139 break; 140 case '\\': 141 if (!(flags & FNM_NOESCAPE)) { 142 if ((c = *pattern++) == EOS) { 143 c = '\\'; 144 --pattern; 145 } 146 } 147 /* FALLTHROUGH */ 148 default: 149 norm: 150 if (c == *string) 151 ; 152 else if ((flags & FNM_CASEFOLD) && 153 (tolower((unsigned char)c) == 154 tolower((unsigned char)*string))) 155 ; 156 else 157 return (FNM_NOMATCH); 158 string++; 159 break; 160 } 161 /* NOTREACHED */ 162 } 163 164 static int 165 rangematch(pattern, test, flags, newp) 166 const char *pattern; 167 char test; 168 int flags; 169 char **newp; 170 { 171 int negate, ok; 172 char c, c2; 173 174 /* 175 * A bracket expression starting with an unquoted circumflex 176 * character produces unspecified results (IEEE 1003.2-1992, 177 * 3.13.2). This implementation treats it like '!', for 178 * consistency with the regular expression syntax. 179 * J.T. Conklin (conklin@ngai.kaleida.com) 180 */ 181 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 182 ++pattern; 183 184 if (flags & FNM_CASEFOLD) 185 test = tolower((unsigned char)test); 186 187 /* 188 * A right bracket shall lose its special meaning and represent 189 * itself in a bracket expression if it occurs first in the list. 190 * -- POSIX.2 2.8.3.2 191 */ 192 ok = 0; 193 c = *pattern++; 194 do { 195 if (c == '\\' && !(flags & FNM_NOESCAPE)) 196 c = *pattern++; 197 if (c == EOS) 198 return (RANGE_ERROR); 199 200 if (c == '/' && (flags & FNM_PATHNAME)) 201 return (RANGE_NOMATCH); 202 203 if (flags & FNM_CASEFOLD) 204 c = tolower((unsigned char)c); 205 206 if (*pattern == '-' 207 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 208 pattern += 2; 209 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 210 c2 = *pattern++; 211 if (c2 == EOS) 212 return (RANGE_ERROR); 213 214 if (flags & FNM_CASEFOLD) 215 c2 = tolower((unsigned char)c2); 216 217 if (__collate_load_error ? 218 c <= test && test <= c2 : 219 __collate_range_cmp(c, test) <= 0 220 && __collate_range_cmp(test, c2) <= 0 221 ) 222 ok = 1; 223 } else if (c == test) 224 ok = 1; 225 } while ((c = *pattern++) != ']'); 226 227 *newp = (char *)pattern; 228 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 229 } 230