diff options
Diffstat (limited to 'posix/fnmatch_loop.c')
| -rw-r--r-- | posix/fnmatch_loop.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/posix/fnmatch_loop.c b/posix/fnmatch_loop.c new file mode 100644 index 0000000000..037a26d623 --- /dev/null +++ b/posix/fnmatch_loop.c @@ -0,0 +1,336 @@ +/* Copyright (C) 1991-1993, 1996-1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Match STRING against the filename pattern PATTERN, returning zero if + it matches, nonzero if not. */ +static int FCT (const CHAR *pattern, const CHAR *string, + int no_leading_period, int flags) internal_function; + +static int +internal_function +FCT (pattern, string, no_leading_period, flags) + const CHAR *pattern; + const CHAR *string; + int no_leading_period; + int flags; +{ + register const CHAR *p = pattern, *n = string; + register UCHAR c; + + while ((c = *p++) != L('\0')) + { + c = FOLD (c); + + switch (c) + { + case L('?'): + if (*n == L('\0')) + return FNM_NOMATCH; + else if (*n == L('/') && (flags & FNM_FILE_NAME)) + return FNM_NOMATCH; + else if (*n == L('.') && no_leading_period + && (n == string + || (n[-1] == L('/') && (flags & FNM_FILE_NAME)))) + return FNM_NOMATCH; + break; + + case L('\\'): + if (!(flags & FNM_NOESCAPE)) + { + c = *p++; + if (c == L('\0')) + /* Trailing \ loses. */ + return FNM_NOMATCH; + c = FOLD (c); + } + if (FOLD ((UCHAR) *n) != c) + return FNM_NOMATCH; + break; + + case L('*'): + if (*n == L('.') && no_leading_period + && (n == string + || (n[-1] == L('/') && (flags & FNM_FILE_NAME)))) + return FNM_NOMATCH; + + for (c = *p++; c == L('?') || c == L('*'); c = *p++) + { + if (*n == L('/') && (flags & FNM_FILE_NAME)) + /* A slash does not match a wildcard under FNM_FILE_NAME. */ + return FNM_NOMATCH; + else if (c == L('?')) + { + /* A ? needs to match one character. */ + if (*n == L('\0')) + /* There isn't another character; no match. */ + return FNM_NOMATCH; + else + /* One character of the string is consumed in matching + this ? wildcard, so *??? won't match if there are + less than three characters. */ + ++n; + } + } + + if (c == L('\0')) + /* The wildcard(s) is/are the last element of the pattern. + If the name is a file name and contains another slash + this does mean it cannot match. */ + return ((flags & FNM_FILE_NAME) && STRCHR (n, L('/')) != NULL + ? FNM_NOMATCH : 0); + else + { + const CHAR *endp; + + endp = STRCHRNUL (n, (flags & FNM_FILE_NAME) ? L('/') : L('\0')); + + if (c == L('[')) + { + int flags2 = ((flags & FNM_FILE_NAME) + ? flags : (flags & ~FNM_PERIOD)); + + for (--p; n < endp; ++n) + if (FCT (p, n, (no_leading_period + && (n == string + || (n[-1] == L('/') + && (flags & FNM_FILE_NAME)))), + flags2) == 0) + return 0; + } + else if (c == L('/') && (flags & FNM_FILE_NAME)) + { + while (*n != L('\0') && *n != L('/')) + ++n; + if (*n == L('/') + && (FCT (p, n + 1, flags & FNM_PERIOD, flags) == 0)) + return 0; + } + else + { + int flags2 = ((flags & FNM_FILE_NAME) + ? flags : (flags & ~FNM_PERIOD)); + + if (c == L('\\') && !(flags & FNM_NOESCAPE)) + c = *p; + c = FOLD (c); + for (--p; n < endp; ++n) + if (FOLD ((UCHAR) *n) == c + && (FCT (p, n, (no_leading_period + && (n == string + || (n[-1] == L('/') + && (flags & FNM_FILE_NAME)))), + flags2) == 0)) + return 0; + } + } + + /* If we come here no match is possible with the wildcard. */ + return FNM_NOMATCH; + + case L('['): + { + /* Nonzero if the sense of the character class is inverted. */ + static int posixly_correct; + register int not; + CHAR cold; + + if (posixly_correct == 0) + posixly_correct = getenv ("POSIXLY_CORRECT") != NULL ? 1 : -1; + + if (*n == L('\0')) + return FNM_NOMATCH; + + if (*n == L('.') && no_leading_period + && (n == string + || (n[-1] == L('/') && (flags & FNM_FILE_NAME)))) + return FNM_NOMATCH; + + if (*n == L('/') && (flags & FNM_FILE_NAME)) + /* `/' cannot be matched. */ + return FNM_NOMATCH; + + not = (*p == L('!') || (posixly_correct < 0 && *p == L('^'))); + if (not) + ++p; + + c = *p++; + for (;;) + { + UCHAR fn = FOLD ((UCHAR) *n); + + if (!(flags & FNM_NOESCAPE) && c == L('\\')) + { + if (*p == L('\0')) + return FNM_NOMATCH; + c = FOLD ((UCHAR) *p); + ++p; + + if (c == fn) + goto matched; + } + else if (c == L('[') && *p == L(':')) + { + /* Leave room for the null. */ + CHAR str[CHAR_CLASS_MAX_LENGTH + 1]; + size_t c1 = 0; +# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H) + wctype_t wt; +# endif + const CHAR *startp = p; + + for (;;) + { + if (c1 == CHAR_CLASS_MAX_LENGTH) + /* The name is too long and therefore the pattern + is ill-formed. */ + return FNM_NOMATCH; + + c = *++p; + if (c == L(':') && p[1] == L(']')) + { + p += 2; + break; + } + if (c < L('a') || c >= L('z')) + { + /* This cannot possibly be a character class name. + Match it as a normal range. */ + p = startp; + c = L('['); + goto normal_bracket; + } + str[c1++] = c; + } + str[c1] = L('\0'); + +# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H) + wt = IS_CHAR_CLASS (str); + if (wt == 0) + /* Invalid character class name. */ + return FNM_NOMATCH; + + if (__iswctype (__btowc ((UCHAR) *n), wt)) + goto matched; +# else + if ((STREQ (str, L("alnum")) && ISALNUM ((UCHAR) *n)) + || (STREQ (str, L("alpha")) && ISALPHA ((UCHAR) *n)) + || (STREQ (str, L("blank")) && ISBLANK ((UCHAR) *n)) + || (STREQ (str, L("cntrl")) && ISCNTRL ((UCHAR) *n)) + || (STREQ (str, L("digit")) && ISDIGIT ((UCHAR) *n)) + || (STREQ (str, L("graph")) && ISGRAPH ((UCHAR) *n)) + || (STREQ (str, L("lower")) && ISLOWER ((UCHAR) *n)) + || (STREQ (str, L("print")) && ISPRINT ((UCHAR) *n)) + || (STREQ (str, L("punct")) && ISPUNCT ((UCHAR) *n)) + || (STREQ (str, L("space")) && ISSPACE ((UCHAR) *n)) + || (STREQ (str, L("upper")) && ISUPPER ((UCHAR) *n)) + || (STREQ (str, L("xdigit")) && ISXDIGIT ((UCHAR) *n))) + goto matched; +# endif + } + else if (c == L('\0')) + /* [ (unterminated) loses. */ + return FNM_NOMATCH; + else + { + normal_bracket: + if (FOLD (c) == fn) + goto matched; + + cold = c; + c = *p++; + + if (c == L('-') && *p != L(']')) + { + /* It is a range. */ + UCHAR cend = *p++; + if (!(flags & FNM_NOESCAPE) && cend == L('\\')) + cend = *p++; + if (cend == L('\0')) + return FNM_NOMATCH; + + if (cold <= fn && fn <= FOLD (cend)) + goto matched; + + c = *p++; + } + } + + if (c == L(']')) + break; + } + + if (!not) + return FNM_NOMATCH; + break; + + matched: + /* Skip the rest of the [...] that already matched. */ + while (c != L(']')) + { + if (c == L('\0')) + /* [... (unterminated) loses. */ + return FNM_NOMATCH; + + c = *p++; + if (!(flags & FNM_NOESCAPE) && c == L('\\')) + { + if (*p == L('\0')) + return FNM_NOMATCH; + /* XXX 1003.2d11 is unclear if this is right. */ + ++p; + } + else if (c == L('[') && *p == L(':')) + { + do + if (*++p == L('\0')) + return FNM_NOMATCH; + while (*p != L(':') || p[1] == L(']')); + p += 2; + c = *p; + } + } + if (not) + return FNM_NOMATCH; + } + break; + + default: + if (c != FOLD ((UCHAR) *n)) + return FNM_NOMATCH; + } + + ++n; + } + + if (*n == '\0') + return 0; + + if ((flags & FNM_LEADING_DIR) && *n == L('/')) + /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */ + return 0; + + return FNM_NOMATCH; + +#undef FOLD +#undef CHAR +#undef UCHAR +#undef FCT +#undef STRCHR +#undef STRCHRNUL +#undef L +} |