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 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 39 #endif /* LIBC_SCCS and not lint */ 40 41 /* 42 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 43 * Compares a filename or pathname to a pattern. 44 */ 45 46 #include <fnmatch.h> 47 #include <string.h> 48 49 #define EOS '\0' 50 51 static const char *rangematch __P((const char *, int, int)); 52 53 int 54 fnmatch(pattern, string, flags) 55 const char *pattern, *string; 56 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 (!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(pattern, test, flags) 137 const char *pattern; 138 int test, flags; 139 { 140 int negate, ok; 141 char c, c2; 142 143 /* 144 * A bracket expression starting with an unquoted circumflex 145 * character produces unspecified results (IEEE 1003.2-1992, 146 * 3.13.2). This implementation treats it like '!', for 147 * consistency with the regular expression syntax. 148 * J.T. Conklin (conklin@ngai.kaleida.com) 149 */ 150 if (negate = (*pattern == '!' || *pattern == '^')) 151 ++pattern; 152 153 for (ok = 0; (c = *pattern++) != ']';) { 154 if (c == '\\' && !(flags & FNM_NOESCAPE)) 155 c = *pattern++; 156 if (c == EOS) 157 return (NULL); 158 if (*pattern == '-' 159 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 160 pattern += 2; 161 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 162 c2 = *pattern++; 163 if (c2 == EOS) 164 return (NULL); 165 if (c <= test && test <= c2) 166 ok = 1; 167 } else if (c == test) 168 ok = 1; 169 } 170 return (ok == negate ? NULL : pattern); 171 } 172