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Diffstat (limited to 'src/port/fnmatch.c')
| -rw-r--r-- | src/port/fnmatch.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/port/fnmatch.c b/src/port/fnmatch.c new file mode 100644 index 00000000000..c7fbc54a317 --- /dev/null +++ b/src/port/fnmatch.c @@ -0,0 +1,198 @@ +/*------------------------------------------------------------------------- + * + * fnmatch.c + * fnmatch() - wildcard matching function + * + * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group + * + * + * IDENTIFICATION + * $PostgreSQL: pgsql/src/port/fnmatch.c,v 1.1 2008/11/24 09:15:16 mha Exp $ + * + * This file was taken from NetBSD and is used on platforms that don't + * provide fnmatch(). The NetBSD copyright terms follow. + *------------------------------------------------------------------------- + */ + +/* $NetBSD: fnmatch.c,v 1.21 2005/12/24 21:11:16 perry Exp $ */ + +/* + * Copyright (c) 1989, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Guido van Rossum. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. + * Compares a filename or pathname to a pattern. + */ + +#include "c.h" +#include "fnmatchstub.h" + +#define EOS '\0' + +static const char *rangematch (const char *, int, int); + +static inline int +foldcase(int ch, int flags) +{ + + if ((flags & FNM_CASEFOLD) != 0 && isupper(ch)) + return (tolower(ch)); + return (ch); +} + +#define FOLDCASE(ch, flags) foldcase((unsigned char)(ch), (flags)) + +int +fnmatch(pattern, string, flags) + const char *pattern, *string; + int flags; +{ + const char *stringstart; + char c, test; + + for (stringstart = string;;) + switch (c = FOLDCASE(*pattern++, flags)) { + case EOS: + if ((flags & FNM_LEADING_DIR) && *string == '/') + return (0); + return (*string == EOS ? 0 : FNM_NOMATCH); + case '?': + if (*string == EOS) + return (FNM_NOMATCH); + if (*string == '/' && (flags & FNM_PATHNAME)) + return (FNM_NOMATCH); + if (*string == '.' && (flags & FNM_PERIOD) && + (string == stringstart || + ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) + return (FNM_NOMATCH); + ++string; + break; + case '*': + c = FOLDCASE(*pattern, flags); + /* Collapse multiple stars. */ + while (c == '*') + c = FOLDCASE(*++pattern, flags); + + if (*string == '.' && (flags & FNM_PERIOD) && + (string == stringstart || + ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) + return (FNM_NOMATCH); + + /* Optimize for pattern with * at end or before /. */ + if (c == EOS) { + if (flags & FNM_PATHNAME) + return ((flags & FNM_LEADING_DIR) || + strchr(string, '/') == NULL ? + 0 : FNM_NOMATCH); + else + return (0); + } else if (c == '/' && flags & FNM_PATHNAME) { + if ((string = strchr(string, '/')) == NULL) + return (FNM_NOMATCH); + break; + } + + /* General case, use recursion. */ + while ((test = FOLDCASE(*string, flags)) != EOS) { + if (!fnmatch(pattern, string, + flags & ~FNM_PERIOD)) + return (0); + if (test == '/' && flags & FNM_PATHNAME) + break; + ++string; + } + return (FNM_NOMATCH); + case '[': + if (*string == EOS) + return (FNM_NOMATCH); + if (*string == '/' && flags & FNM_PATHNAME) + return (FNM_NOMATCH); + if ((pattern = + rangematch(pattern, FOLDCASE(*string, flags), + flags)) == NULL) + return (FNM_NOMATCH); + ++string; + break; + case '\\': + if (!(flags & FNM_NOESCAPE)) { + if ((c = FOLDCASE(*pattern++, flags)) == EOS) { + c = '\\'; + --pattern; + } + } + /* FALLTHROUGH */ + default: + if (c != FOLDCASE(*string++, flags)) + return (FNM_NOMATCH); + break; + } + /* NOTREACHED */ +} + +static const char * +rangematch(pattern, test, flags) + const char *pattern; + int test, flags; +{ + int negate, ok; + char c, c2; + + /* + * A bracket expression starting with an unquoted circumflex + * character produces unspecified results (IEEE 1003.2-1992, + * 3.13.2). This implementation treats it like '!', for + * consistency with the regular expression syntax. + * J.T. Conklin (conklin@ngai.kaleida.com) + */ + if ((negate = (*pattern == '!' || *pattern == '^')) != 0) + ++pattern; + + for (ok = 0; (c = FOLDCASE(*pattern++, flags)) != ']';) { + if (c == '\\' && !(flags & FNM_NOESCAPE)) + c = FOLDCASE(*pattern++, flags); + if (c == EOS) + return (NULL); + if (*pattern == '-' + && (c2 = FOLDCASE(*(pattern+1), flags)) != EOS && + c2 != ']') { + pattern += 2; + if (c2 == '\\' && !(flags & FNM_NOESCAPE)) + c2 = FOLDCASE(*pattern++, flags); + if (c2 == EOS) + return (NULL); + if (c <= test && test <= c2) + ok = 1; + } else if (c == test) + ok = 1; + } + return (ok == negate ? NULL : pattern); +} |