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Diffstat (limited to 'gnu/usr.bin/tar/fnmatch.c')
| -rw-r--r-- | gnu/usr.bin/tar/fnmatch.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/gnu/usr.bin/tar/fnmatch.c b/gnu/usr.bin/tar/fnmatch.c new file mode 100644 index 000000000000..ed8c9eea7e35 --- /dev/null +++ b/gnu/usr.bin/tar/fnmatch.c @@ -0,0 +1,173 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with this library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <errno.h> +#include <fnmatch.h> + +#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS) +extern int errno; +#endif + +/* Match STRING against the filename pattern PATTERN, returning zero if + it matches, nonzero if not. */ +int +fnmatch (pattern, string, flags) + const char *pattern; + const char *string; + int flags; +{ + register const char *p = pattern, *n = string; + register char c; + + if ((flags & ~__FNM_FLAGS) != 0) + { + errno = EINVAL; + return -1; + } + + while ((c = *p++) != '\0') + { + switch (c) + { + case '?': + if (*n == '\0') + return FNM_NOMATCH; + else if ((flags & FNM_PATHNAME) && *n == '/') + return FNM_NOMATCH; + else if ((flags & FNM_PERIOD) && *n == '.' && + (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) + return FNM_NOMATCH; + break; + + case '\\': + if (!(flags & FNM_NOESCAPE)) + c = *p++; + if (*n != c) + return FNM_NOMATCH; + break; + + case '*': + if ((flags & FNM_PERIOD) && *n == '.' && + (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) + return FNM_NOMATCH; + + for (c = *p++; c == '?' || c == '*'; c = *p++, ++n) + if (((flags & FNM_PATHNAME) && *n == '/') || + (c == '?' && *n == '\0')) + return FNM_NOMATCH; + + if (c == '\0') + return 0; + + { + char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c; + for (--p; *n != '\0'; ++n) + if ((c == '[' || *n == c1) && + fnmatch (p, n, flags & ~FNM_PERIOD) == 0) + return 0; + return FNM_NOMATCH; + } + + case '[': + { + /* Nonzero if the sense of the character class is inverted. */ + register int not; + + if (*n == '\0') + return FNM_NOMATCH; + + if ((flags & FNM_PERIOD) && *n == '.' && + (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) + return FNM_NOMATCH; + + not = (*p == '!' || *p == '^'); + if (not) + ++p; + + c = *p++; + for (;;) + { + register char cstart = c, cend = c; + + if (!(flags & FNM_NOESCAPE) && c == '\\') + cstart = cend = *p++; + + if (c == '\0') + /* [ (unterminated) loses. */ + return FNM_NOMATCH; + + c = *p++; + + if ((flags & FNM_PATHNAME) && c == '/') + /* [/] can never match. */ + return FNM_NOMATCH; + + if (c == '-' && *p != ']') + { + cend = *p++; + if (!(flags & FNM_NOESCAPE) && cend == '\\') + cend = *p++; + if (cend == '\0') + return FNM_NOMATCH; + c = *p++; + } + + if (*n >= cstart && *n <= cend) + goto matched; + + if (c == ']') + break; + } + if (!not) + return FNM_NOMATCH; + break; + + matched:; + /* Skip the rest of the [...] that already matched. */ + while (c != ']') + { + if (c == '\0') + /* [... (unterminated) loses. */ + return FNM_NOMATCH; + + c = *p++; + if (!(flags & FNM_NOESCAPE) && c == '\\') + /* 1003.2d11 is unclear if this is right. %%% */ + ++p; + } + if (not) + return FNM_NOMATCH; + } + break; + + default: + if (c != *n) + return FNM_NOMATCH; + } + + ++n; + } + + if (*n == '\0') + return 0; + + if ((flags & FNM_LEADING_DIR) && *n == '/') + /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */ + return 0; + + return FNM_NOMATCH; +} |