1 /* $NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 #if 0 41 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 42 #else 43 static char rcsid[] = "$NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd Exp $"; 44 #endif 45 #endif /* LIBC_SCCS and not lint */ 46 47 /* 48 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 49 * Compares a filename or pathname to a pattern. 50 */ 51 52 #include <fnmatch.h> 53 #include <string.h> 54 55 #define EOS '\0' 56 57 static const char *rangematch (const char *, int, int); 58 59 int 60 fnmatch(const char *pattern, const char *string, int flags) 61 { 62 const char *stringstart; 63 char c, test; 64 65 for (stringstart = string;;) 66 switch (c = *pattern++) { 67 case EOS: 68 return (*string == EOS ? 0 : FNM_NOMATCH); 69 case '?': 70 if (*string == EOS) 71 return (FNM_NOMATCH); 72 if (*string == '/' && (flags & FNM_PATHNAME)) 73 return (FNM_NOMATCH); 74 if (*string == '.' && (flags & FNM_PERIOD) && 75 (string == stringstart || 76 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 77 return (FNM_NOMATCH); 78 ++string; 79 break; 80 case '*': 81 c = *pattern; 82 /* Collapse multiple stars. */ 83 while (c == '*') 84 c = *++pattern; 85 86 if (*string == '.' && (flags & FNM_PERIOD) && 87 (string == stringstart || 88 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 89 return (FNM_NOMATCH); 90 91 /* Optimize for pattern with * at end or before /. */ 92 if (c == EOS) 93 if (flags & FNM_PATHNAME) 94 return (strchr(string, '/') == NULL ? 95 0 : FNM_NOMATCH); 96 else 97 return (0); 98 else if (c == '/' && flags & FNM_PATHNAME) { 99 if ((string = strchr(string, '/')) == NULL) 100 return (FNM_NOMATCH); 101 break; 102 } 103 104 /* General case, use recursion. */ 105 while ((test = *string) != EOS) { 106 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 107 return (0); 108 if (test == '/' && flags & FNM_PATHNAME) 109 break; 110 ++string; 111 } 112 return (FNM_NOMATCH); 113 case '[': 114 if (*string == EOS) 115 return (FNM_NOMATCH); 116 if (*string == '/' && flags & FNM_PATHNAME) 117 return (FNM_NOMATCH); 118 if ((pattern = 119 rangematch(pattern, *string, flags)) == NULL) 120 return (FNM_NOMATCH); 121 ++string; 122 break; 123 case '\\': 124 if (!(flags & FNM_NOESCAPE)) { 125 if ((c = *pattern++) == EOS) { 126 c = '\\'; 127 --pattern; 128 } 129 } 130 /* FALLTHROUGH */ 131 default: 132 if (c != *string++) 133 return (FNM_NOMATCH); 134 break; 135 } 136 /* NOTREACHED */ 137 } 138 139 static const char * 140 rangematch(const char *pattern, int test, int flags) 141 { 142 int negate, ok; 143 char c, c2; 144 145 /* 146 * A bracket expression starting with an unquoted circumflex 147 * character produces unspecified results (IEEE 1003.2-1992, 148 * 3.13.2). This implementation treats it like '!', for 149 * consistency with the regular expression syntax. 150 * J.T. Conklin (conklin@ngai.kaleida.com) 151 */ 152 if (negate = (*pattern == '!' || *pattern == '^')) 153 ++pattern; 154 155 for (ok = 0; (c = *pattern++) != ']';) { 156 if (c == '\\' && !(flags & FNM_NOESCAPE)) 157 c = *pattern++; 158 if (c == EOS) 159 return (NULL); 160 if (*pattern == '-' 161 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 162 pattern += 2; 163 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 164 c2 = *pattern++; 165 if (c2 == EOS) 166 return (NULL); 167 if (c <= test && test <= c2) 168 ok = 1; 169 } else if (c == test) 170 ok = 1; 171 } 172 return (ok == negate ? NULL : pattern); 173 } 174