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. 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 static char rcsid[] = "$NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd 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 #ifdef HAVE_CONFIG_H 49 #include <config.h> 50 #endif 51 52 #include <roken.h> 53 54 #include <fnmatch.h> 55 #include <string.h> 56 57 #define EOS '\0' 58 59 static const char *rangematch (const char *, int, int); 60 61 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 62 rk_fnmatch(const char *pattern, const char *string, int flags) 63 { 64 const char *stringstart; 65 char c, test; 66 67 for (stringstart = string;;) 68 switch (c = *pattern++) { 69 case EOS: 70 return (*string == EOS ? 0 : FNM_NOMATCH); 71 case '?': 72 if (*string == EOS) 73 return (FNM_NOMATCH); 74 if (*string == '/' && (flags & FNM_PATHNAME)) 75 return (FNM_NOMATCH); 76 if (*string == '.' && (flags & FNM_PERIOD) && 77 (string == stringstart || 78 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 79 return (FNM_NOMATCH); 80 ++string; 81 break; 82 case '*': 83 c = *pattern; 84 /* Collapse multiple stars. */ 85 while (c == '*') 86 c = *++pattern; 87 88 if (*string == '.' && (flags & FNM_PERIOD) && 89 (string == stringstart || 90 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 91 return (FNM_NOMATCH); 92 93 /* Optimize for pattern with * at end or before /. */ 94 if (c == EOS) 95 if (flags & FNM_PATHNAME) 96 return (strchr(string, '/') == NULL ? 97 0 : FNM_NOMATCH); 98 else 99 return (0); 100 else if (c == '/' && flags & FNM_PATHNAME) { 101 if ((string = strchr(string, '/')) == NULL) 102 return (FNM_NOMATCH); 103 break; 104 } 105 106 /* General case, use recursion. */ 107 while ((test = *string) != EOS) { 108 if (!rk_fnmatch(pattern, string, flags & ~FNM_PERIOD)) 109 return (0); 110 if (test == '/' && flags & FNM_PATHNAME) 111 break; 112 ++string; 113 } 114 return (FNM_NOMATCH); 115 case '[': 116 if (*string == EOS) 117 return (FNM_NOMATCH); 118 if (*string == '/' && flags & FNM_PATHNAME) 119 return (FNM_NOMATCH); 120 if ((pattern = 121 rangematch(pattern, *string, flags)) == NULL) 122 return (FNM_NOMATCH); 123 ++string; 124 break; 125 case '\\': 126 if (!(flags & FNM_NOESCAPE)) { 127 if ((c = *pattern++) == EOS) { 128 c = '\\'; 129 --pattern; 130 } 131 } 132 /* FALLTHROUGH */ 133 default: 134 if (c != *string++) 135 return (FNM_NOMATCH); 136 break; 137 } 138 /* NOTREACHED */ 139 } 140 141 static const char * 142 rangematch(const char *pattern, int test, int flags) 143 { 144 int negate, ok; 145 char c, c2; 146 147 /* 148 * A bracket expression starting with an unquoted circumflex 149 * character produces unspecified results (IEEE 1003.2-1992, 150 * 3.13.2). This implementation treats it like '!', for 151 * consistency with the regular expression syntax. 152 * J.T. Conklin (conklin@ngai.kaleida.com) 153 */ 154 if (negate = (*pattern == '!' || *pattern == '^')) 155 ++pattern; 156 157 for (ok = 0; (c = *pattern++) != ']';) { 158 if (c == '\\' && !(flags & FNM_NOESCAPE)) 159 c = *pattern++; 160 if (c == EOS) 161 return (NULL); 162 if (*pattern == '-' 163 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 164 pattern += 2; 165 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 166 c2 = *pattern++; 167 if (c2 == EOS) 168 return (NULL); 169 if (c <= test && test <= c2) 170 ok = 1; 171 } else if (c == test) 172 ok = 1; 173 } 174 return (ok == negate ? NULL : pattern); 175 } 176