1 /* $NetBSD: fnmatch.c,v 1.24 2011/01/31 19:10:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Guido van Rossum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if defined(LIBC_SCCS) && !defined(lint) 36 #if 0 37 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 38 #else 39 __RCSID("$NetBSD: fnmatch.c,v 1.24 2011/01/31 19:10:18 christos Exp $"); 40 #endif 41 #endif /* LIBC_SCCS and not lint */ 42 43 /* 44 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 45 * Compares a filename or pathname to a pattern. 46 */ 47 48 #include "k5-platform.h" 49 #include <ctype.h> 50 #ifndef _DIAGASSERT 51 #define _DIAGASSERT(x) 52 #endif 53 54 #define EOS '\0' 55 56 static inline int 57 foldcase(int ch, int flags) 58 { 59 60 if ((flags & FNM_CASEFOLD) != 0 && isupper(ch)) 61 return tolower(ch); 62 return ch; 63 } 64 65 #define FOLDCASE(ch, flags) foldcase((unsigned char)(ch), (flags)) 66 67 static const char * 68 rangematch(const char *pattern, int test, int flags) 69 { 70 int negate, ok; 71 char c, c2; 72 73 _DIAGASSERT(pattern != NULL); 74 75 /* 76 * A bracket expression starting with an unquoted circumflex 77 * character produces unspecified results (IEEE 1003.2-1992, 78 * 3.13.2). This implementation treats it like '!', for 79 * consistency with the regular expression syntax. 80 * J.T. Conklin (conklin@ngai.kaleida.com) 81 */ 82 if ((negate = (*pattern == '!' || *pattern == '^')) != 0) 83 ++pattern; 84 85 for (ok = 0; (c = FOLDCASE(*pattern++, flags)) != ']';) { 86 if (c == '\\' && !(flags & FNM_NOESCAPE)) 87 c = FOLDCASE(*pattern++, flags); 88 if (c == EOS) 89 return NULL; 90 if (*pattern == '-' 91 && (c2 = FOLDCASE(*(pattern + 1), flags)) != EOS && 92 c2 != ']') { 93 pattern += 2; 94 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 95 c2 = FOLDCASE(*pattern++, flags); 96 if (c2 == EOS) 97 return NULL; 98 if (c <= test && test <= c2) 99 ok = 1; 100 } else if (c == test) 101 ok = 1; 102 } 103 return ok == negate ? NULL : pattern; 104 } 105 106 107 static int 108 fnmatchx(const char *pattern, const char *string, int flags, size_t recursion) 109 { 110 const char *stringstart; 111 char c, test; 112 113 _DIAGASSERT(pattern != NULL); 114 _DIAGASSERT(string != NULL); 115 116 if (recursion-- == 0) 117 return FNM_NORES; 118 119 for (stringstart = string;;) { 120 switch (c = FOLDCASE(*pattern++, flags)) { 121 case EOS: 122 if ((flags & FNM_LEADING_DIR) && *string == '/') 123 return 0; 124 return *string == EOS ? 0 : FNM_NOMATCH; 125 case '?': 126 if (*string == EOS) 127 return FNM_NOMATCH; 128 if (*string == '/' && (flags & FNM_PATHNAME)) 129 return FNM_NOMATCH; 130 if (*string == '.' && (flags & FNM_PERIOD) && 131 (string == stringstart || 132 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 133 return FNM_NOMATCH; 134 ++string; 135 break; 136 case '*': 137 c = FOLDCASE(*pattern, flags); 138 /* Collapse multiple stars. */ 139 while (c == '*') 140 c = FOLDCASE(*++pattern, flags); 141 142 if (*string == '.' && (flags & FNM_PERIOD) && 143 (string == stringstart || 144 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 145 return FNM_NOMATCH; 146 147 /* Optimize for pattern with * at end or before /. */ 148 if (c == EOS) { 149 if (flags & FNM_PATHNAME) 150 return (flags & FNM_LEADING_DIR) || 151 strchr(string, '/') == NULL ? 152 0 : FNM_NOMATCH; 153 else 154 return 0; 155 } else if (c == '/' && flags & FNM_PATHNAME) { 156 if ((string = strchr(string, '/')) == NULL) 157 return FNM_NOMATCH; 158 break; 159 } 160 161 /* General case, use recursion. */ 162 while ((test = FOLDCASE(*string, flags)) != EOS) { 163 int e; 164 switch ((e = fnmatchx(pattern, string, 165 flags & ~FNM_PERIOD, recursion))) { 166 case FNM_NOMATCH: 167 break; 168 default: 169 return e; 170 } 171 if (test == '/' && flags & FNM_PATHNAME) 172 break; 173 ++string; 174 } 175 return FNM_NOMATCH; 176 case '[': 177 if (*string == EOS) 178 return FNM_NOMATCH; 179 if (*string == '/' && flags & FNM_PATHNAME) 180 return FNM_NOMATCH; 181 if ((pattern = rangematch(pattern, 182 FOLDCASE(*string, flags), flags)) == NULL) 183 return FNM_NOMATCH; 184 ++string; 185 break; 186 case '\\': 187 if (!(flags & FNM_NOESCAPE)) { 188 if ((c = FOLDCASE(*pattern++, flags)) == EOS) { 189 c = '\\'; 190 --pattern; 191 } 192 } 193 /* FALLTHROUGH */ 194 default: 195 if (c != FOLDCASE(*string++, flags)) 196 return FNM_NOMATCH; 197 break; 198 } 199 } 200 /* NOTREACHED */ 201 } 202 203 int 204 k5_fnmatch(const char *pattern, const char *string, int flags) 205 { 206 return fnmatchx(pattern, string, flags, 64); 207 } 208