fnmatch.c revision 19132
11573Srgrimes/* 21573Srgrimes * Copyright (c) 1989, 1993, 1994 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Guido van Rossum. 71573Srgrimes * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 161573Srgrimes * 3. All advertising materials mentioning features or use of this software 171573Srgrimes * must display the following acknowledgement: 181573Srgrimes * This product includes software developed by the University of 191573Srgrimes * California, Berkeley and its contributors. 201573Srgrimes * 4. Neither the name of the University nor the names of its contributors 211573Srgrimes * may be used to endorse or promote products derived from this software 221573Srgrimes * without specific prior written permission. 231573Srgrimes * 241573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341573Srgrimes * SUCH DAMAGE. 351573Srgrimes */ 361573Srgrimes 371573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 381573Srgrimesstatic char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 391573Srgrimes#endif /* LIBC_SCCS and not lint */ 401573Srgrimes 411573Srgrimes/* 421573Srgrimes * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 431573Srgrimes * Compares a filename or pathname to a pattern. 441573Srgrimes */ 451573Srgrimes 4619059Swosch#include <ctype.h> 471573Srgrimes#include <fnmatch.h> 4817552Sache#include <locale.h> 491573Srgrimes#include <string.h> 5019059Swosch#include <stdio.h> 511573Srgrimes 521573Srgrimes#define EOS '\0' 531573Srgrimes 5419132Sachestatic const char *rangematch __P((const char *, char, int)); 551573Srgrimes 561573Srgrimesint 571573Srgrimesfnmatch(pattern, string, flags) 581573Srgrimes const char *pattern, *string; 591573Srgrimes int flags; 601573Srgrimes{ 611573Srgrimes const char *stringstart; 621573Srgrimes char c, test; 631573Srgrimes 641573Srgrimes for (stringstart = string;;) 651573Srgrimes switch (c = *pattern++) { 661573Srgrimes case EOS: 6719132Sache if ((flags & FNM_LEADING_DIR) && *string == '/') 6819132Sache return (0); 691573Srgrimes return (*string == EOS ? 0 : FNM_NOMATCH); 701573Srgrimes case '?': 711573Srgrimes if (*string == EOS) 721573Srgrimes return (FNM_NOMATCH); 731573Srgrimes if (*string == '/' && (flags & FNM_PATHNAME)) 741573Srgrimes return (FNM_NOMATCH); 751573Srgrimes if (*string == '.' && (flags & FNM_PERIOD) && 761573Srgrimes (string == stringstart || 771573Srgrimes ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 781573Srgrimes return (FNM_NOMATCH); 791573Srgrimes ++string; 801573Srgrimes break; 811573Srgrimes case '*': 821573Srgrimes c = *pattern; 831573Srgrimes /* Collapse multiple stars. */ 841573Srgrimes while (c == '*') 851573Srgrimes c = *++pattern; 861573Srgrimes 871573Srgrimes if (*string == '.' && (flags & FNM_PERIOD) && 881573Srgrimes (string == stringstart || 891573Srgrimes ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 901573Srgrimes return (FNM_NOMATCH); 911573Srgrimes 921573Srgrimes /* Optimize for pattern with * at end or before /. */ 931573Srgrimes if (c == EOS) 941573Srgrimes if (flags & FNM_PATHNAME) 951573Srgrimes return (strchr(string, '/') == NULL ? 961573Srgrimes 0 : FNM_NOMATCH); 971573Srgrimes else 981573Srgrimes return (0); 991573Srgrimes else if (c == '/' && flags & FNM_PATHNAME) { 1001573Srgrimes if ((string = strchr(string, '/')) == NULL) 1011573Srgrimes return (FNM_NOMATCH); 1021573Srgrimes break; 1031573Srgrimes } 1041573Srgrimes 1051573Srgrimes /* General case, use recursion. */ 1061573Srgrimes while ((test = *string) != EOS) { 1071573Srgrimes if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 1081573Srgrimes return (0); 1091573Srgrimes if (test == '/' && flags & FNM_PATHNAME) 1101573Srgrimes break; 1111573Srgrimes ++string; 1121573Srgrimes } 1131573Srgrimes return (FNM_NOMATCH); 1141573Srgrimes case '[': 1151573Srgrimes if (*string == EOS) 1161573Srgrimes return (FNM_NOMATCH); 1171573Srgrimes if (*string == '/' && flags & FNM_PATHNAME) 1181573Srgrimes return (FNM_NOMATCH); 1191573Srgrimes if ((pattern = 1201573Srgrimes rangematch(pattern, *string, flags)) == NULL) 1211573Srgrimes return (FNM_NOMATCH); 1221573Srgrimes ++string; 1231573Srgrimes break; 1241573Srgrimes case '\\': 1251573Srgrimes if (!(flags & FNM_NOESCAPE)) { 1261573Srgrimes if ((c = *pattern++) == EOS) { 1271573Srgrimes c = '\\'; 1281573Srgrimes --pattern; 1291573Srgrimes } 1301573Srgrimes } 1311573Srgrimes /* FALLTHROUGH */ 1321573Srgrimes default: 13319059Swosch if (c == *string) 13419059Swosch ; 13519132Sache else if ((flags & FNM_CASEFOLD) && 13619132Sache (tolower((unsigned char)c) == 13719132Sache tolower((unsigned char)*string))) 13819059Swosch ; 13919059Swosch else 1401573Srgrimes return (FNM_NOMATCH); 14119059Swosch string++; 1421573Srgrimes break; 1431573Srgrimes } 1441573Srgrimes /* NOTREACHED */ 1451573Srgrimes} 1461573Srgrimes 1471573Srgrimesstatic const char * 1481573Srgrimesrangematch(pattern, test, flags) 1491573Srgrimes const char *pattern; 15019132Sache char test; 15119132Sache int flags; 1521573Srgrimes{ 1531573Srgrimes int negate, ok; 1541573Srgrimes char c, c2; 1551573Srgrimes 1561573Srgrimes /* 1571573Srgrimes * A bracket expression starting with an unquoted circumflex 1581573Srgrimes * character produces unspecified results (IEEE 1003.2-1992, 1591573Srgrimes * 3.13.2). This implementation treats it like '!', for 1601573Srgrimes * consistency with the regular expression syntax. 1611573Srgrimes * J.T. Conklin (conklin@ngai.kaleida.com) 1621573Srgrimes */ 16317141Sjkh if ( (negate = (*pattern == '!' || *pattern == '^')) ) 1641573Srgrimes ++pattern; 1658870Srgrimes 16619132Sache if (flags & FNM_CASEFOLD) 16719132Sache test = tolower((unsigned char)test); 16819059Swosch 1691573Srgrimes for (ok = 0; (c = *pattern++) != ']';) { 1701573Srgrimes if (c == '\\' && !(flags & FNM_NOESCAPE)) 1711573Srgrimes c = *pattern++; 1721573Srgrimes if (c == EOS) 1731573Srgrimes return (NULL); 17419059Swosch 17519132Sache if (flags & FNM_CASEFOLD) 17619132Sache c = tolower((unsigned char)c); 17719059Swosch 1788870Srgrimes if (*pattern == '-' 1791573Srgrimes && (c2 = *(pattern+1)) != EOS && c2 != ']') { 1801573Srgrimes pattern += 2; 1811573Srgrimes if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 1821573Srgrimes c2 = *pattern++; 1831573Srgrimes if (c2 == EOS) 1841573Srgrimes return (NULL); 18519059Swosch 18619132Sache if (flags & FNM_CASEFOLD) 18719132Sache c2 = tolower((unsigned char)c2); 18819059Swosch 18917552Sache if ( collate_range_cmp(c, test) <= 0 19017552Sache && collate_range_cmp(test, c2) <= 0 19117533Sache ) 1921573Srgrimes ok = 1; 1931573Srgrimes } else if (c == test) 1941573Srgrimes ok = 1; 1951573Srgrimes } 1961573Srgrimes return (ok == negate ? NULL : pattern); 1971573Srgrimes} 198