diff options
Diffstat (limited to 'libc/unistd/fnmatch.c')
| -rw-r--r-- | libc/unistd/fnmatch.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/libc/unistd/fnmatch.c b/libc/unistd/fnmatch.c new file mode 100644 index 0000000..ad31c9e --- /dev/null +++ b/libc/unistd/fnmatch.c @@ -0,0 +1,205 @@ +/* $OpenBSD: fnmatch.c,v 1.13 2006/03/31 05:34:14 deraadt 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 <ctype.h> +#include <stdio.h> +#include <string.h> +#include <fnmatch.h> + +#define EOS '\0' + +#define RANGE_MATCH 1 +#define RANGE_NOMATCH 0 +#define RANGE_ERROR (-1) + +static int rangematch(const char *, char, int, char **); + +int +fnmatch(const char *pattern, const char *string, int flags) +{ + const char *stringstart; + char *newp; + char c, test; + + for (stringstart = string;;) + switch (c = *pattern++) { + 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 = *pattern; + /* Collapse multiple stars. */ + while (c == '*') + c = *++pattern; + + 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 = *string) != 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 (*string == '.' && (flags & FNM_PERIOD) && + (string == stringstart || + ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) + return (FNM_NOMATCH); + + switch (rangematch(pattern, *string, flags, &newp)) { + case RANGE_ERROR: + /* not a good range, treat as normal text */ + goto normal; + case RANGE_MATCH: + pattern = newp; + break; + case RANGE_NOMATCH: + return (FNM_NOMATCH); + } + ++string; + break; + case '\\': + if (!(flags & FNM_NOESCAPE)) { + if ((c = *pattern++) == EOS) { + c = '\\'; + --pattern; + } + } + /* FALLTHROUGH */ + default: + normal: + if (c != *string && !((flags & FNM_CASEFOLD) && + (tolower((unsigned char)c) == + tolower((unsigned char)*string)))) + return (FNM_NOMATCH); + ++string; + break; + } + /* NOTREACHED */ +} + +static int +rangematch(const char *pattern, char test, int flags, char **newp) +{ + 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 == '^'))) + ++pattern; + + if (flags & FNM_CASEFOLD) + test = (char)tolower((unsigned char)test); + + /* + * A right bracket shall lose its special meaning and represent + * itself in a bracket expression if it occurs first in the list. + * -- POSIX.2 2.8.3.2 + */ + ok = 0; + c = *pattern++; + do { + if (c == '\\' && !(flags & FNM_NOESCAPE)) + c = *pattern++; + if (c == EOS) + return (RANGE_ERROR); + if (c == '/' && (flags & FNM_PATHNAME)) + return (RANGE_NOMATCH); + if ((flags & FNM_CASEFOLD)) + c = (char)tolower((unsigned char)c); + if (*pattern == '-' + && (c2 = *(pattern+1)) != EOS && c2 != ']') { + pattern += 2; + if (c2 == '\\' && !(flags & FNM_NOESCAPE)) + c2 = *pattern++; + if (c2 == EOS) + return (RANGE_ERROR); + if (flags & FNM_CASEFOLD) + c2 = (char)tolower((unsigned char)c2); + if (c <= test && test <= c2) + ok = 1; + } else if (c == test) + ok = 1; + } while ((c = *pattern++) != ']'); + + *newp = (char *)pattern; + return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); +} |