147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Copyright (c) 1997-2009 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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/* This module contains an internal function that is used to match an extended
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class. It is used by both pcre_exec() and pcre_def_exec(). */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre_internal.h"
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/*************************************************
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* Match character against an XCLASS *
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*************************************************/
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/* This function is called to match a character against an extended class that
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might contain values > 255 and/or Unicode properties.
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Arguments:
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c the character
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data points to the flag byte of the XCLASS data
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Returns: TRUE if character matches, else FALSE
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*/
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BOOL
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_pcre_xclass(int c, const uschar *data)
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{
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int t;
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BOOL negated = (*data & XCL_NOT) != 0;
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/* Character values < 256 are matched against a bitmap, if one is present. If
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not, we still carry on, because there may be ranges that start below 256 in the
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additional data. */
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if (c < 256)
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{
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if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
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return !negated; /* char found */
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}
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/* First skip the bit map if present. Then match against the list of Unicode
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properties or large chars or ranges that end with a large char. We won't ever
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encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
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if ((*data++ & XCL_MAP) != 0) data += 32;
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while ((t = *data++) != XCL_END)
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{
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int x, y;
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if (t == XCL_SINGLE)
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{
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GETCHARINC(x, data);
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if (c == x) return !negated;
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}
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else if (t == XCL_RANGE)
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{
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GETCHARINC(x, data);
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GETCHARINC(y, data);
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if (c >= x && c <= y) return !negated;
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}
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#ifdef SUPPORT_UCP
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else /* XCL_PROP & XCL_NOTPROP */
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{
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const ucd_record *prop = GET_UCD(c);
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switch(*data)
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{
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case PT_ANY:
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if (t == XCL_PROP) return !negated;
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break;
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case PT_LAMP:
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if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || prop->chartype == ucp_Lt) ==
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(t == XCL_PROP)) return !negated;
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break;
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case PT_GC:
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if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
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break;
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case PT_PC:
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if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
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break;
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case PT_SC:
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if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
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break;
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/* This should never occur, but compilers may mutter if there is no
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default. */
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default:
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return FALSE;
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}
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data += 2;
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}
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#endif /* SUPPORT_UCP */
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}
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return negated; /* char did not match */
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}
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/* End of pcre_xclass.c */
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