home *** CD-ROM | disk | FTP | other *** search
- /*************************************************
- * Perl-Compatible Regular Expressions *
- *************************************************/
-
- /* PCRE is a library of functions to support regular expressions whose syntax
- and semantics are as close as possible to those of the Perl 5 language.
-
- Written by Philip Hazel
- Copyright (c) 1997-2007 University of Cambridge
-
- -----------------------------------------------------------------------------
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- * 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.
-
- * Neither the name of the University of Cambridge 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
- -----------------------------------------------------------------------------
- */
-
-
- /* This module contains an internal function that is used to match an extended
- class (one that contains characters whose values are > 255). It is used by both
- pcre_exec() and pcre_def_exec(). */
-
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "pcre_internal.h"
-
-
- /*************************************************
- * Match character against an XCLASS *
- *************************************************/
-
- /* This function is called to match a character against an extended class that
- might contain values > 255.
-
- Arguments:
- c the character
- data points to the flag byte of the XCLASS data
-
- Returns: TRUE if character matches, else FALSE
- */
-
- BOOL
- _pcre_xclass(int c, const uschar *data)
- {
- int t;
- BOOL negated = (*data & XCL_NOT) != 0;
-
- /* Character values < 256 are matched against a bitmap, if one is present. If
- not, we still carry on, because there may be ranges that start below 256 in the
- additional data. */
-
- if (c < 256)
- {
- if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
- return !negated; /* char found */
- }
-
- /* First skip the bit map if present. Then match against the list of Unicode
- properties or large chars or ranges that end with a large char. We won't ever
- encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
-
- if ((*data++ & XCL_MAP) != 0) data += 32;
-
- while ((t = *data++) != XCL_END)
- {
- int x, y;
- if (t == XCL_SINGLE)
- {
- GETCHARINC(x, data);
- if (c == x) return !negated;
- }
- else if (t == XCL_RANGE)
- {
- GETCHARINC(x, data);
- GETCHARINC(y, data);
- if (c >= x && c <= y) return !negated;
- }
-
- #ifdef SUPPORT_UCP
- else /* XCL_PROP & XCL_NOTPROP */
- {
- int chartype, script;
- int category = _pcre_ucp_findprop(c, &chartype, &script);
-
- switch(*data)
- {
- case PT_ANY:
- if (t == XCL_PROP) return !negated;
- break;
-
- case PT_LAMP:
- if ((chartype == ucp_Lu || chartype == ucp_Ll || chartype == ucp_Lt) ==
- (t == XCL_PROP)) return !negated;
- break;
-
- case PT_GC:
- if ((data[1] == category) == (t == XCL_PROP)) return !negated;
- break;
-
- case PT_PC:
- if ((data[1] == chartype) == (t == XCL_PROP)) return !negated;
- break;
-
- case PT_SC:
- if ((data[1] == script) == (t == XCL_PROP)) return !negated;
- break;
-
- /* This should never occur, but compilers may mutter if there is no
- default. */
-
- default:
- return FALSE;
- }
-
- data += 2;
- }
- #endif /* SUPPORT_UCP */
- }
-
- return negated; /* char did not match */
- }
-
- /* End of pcre_xclass.c */
-