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