dvander@2762: /*************************************************
dvander@2762: *      Perl-Compatible Regular Expressions       *
dvander@2762: *************************************************/
dvander@2762: 
dvander@2762: /* PCRE is a library of functions to support regular expressions whose syntax
dvander@2762: and semantics are as close as possible to those of the Perl 5 language.
dvander@2762: 
dvander@2762:                        Written by Philip Hazel
dvander@2762:            Copyright (c) 1997-2009 University of Cambridge
dvander@2762: 
dvander@2762: -----------------------------------------------------------------------------
dvander@2762: Redistribution and use in source and binary forms, with or without
dvander@2762: modification, are permitted provided that the following conditions are met:
dvander@2762: 
dvander@2762:     * Redistributions of source code must retain the above copyright notice,
dvander@2762:       this list of conditions and the following disclaimer.
dvander@2762: 
dvander@2762:     * Redistributions in binary form must reproduce the above copyright
dvander@2762:       notice, this list of conditions and the following disclaimer in the
dvander@2762:       documentation and/or other materials provided with the distribution.
dvander@2762: 
dvander@2762:     * Neither the name of the University of Cambridge nor the names of its
dvander@2762:       contributors may be used to endorse or promote products derived from
dvander@2762:       this software without specific prior written permission.
dvander@2762: 
dvander@2762: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
dvander@2762: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
dvander@2762: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
dvander@2762: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
dvander@2762: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
dvander@2762: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
dvander@2762: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
dvander@2762: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
dvander@2762: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
dvander@2762: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
dvander@2762: POSSIBILITY OF SUCH DAMAGE.
dvander@2762: -----------------------------------------------------------------------------
dvander@2762: */
dvander@2762: 
dvander@2762: 
dvander@2762: /* This module contains an internal function that is used to match an extended
dvander@2762: class. It is used by both pcre_exec() and pcre_def_exec(). */
dvander@2762: 
dvander@2762: 
dvander@2762: #ifdef HAVE_CONFIG_H
dvander@2762: #include "config.h"
dvander@2762: #endif
dvander@2762: 
dvander@2762: #include "pcre_internal.h"
dvander@2762: 
dvander@2762: 
dvander@2762: /*************************************************
dvander@2762: *       Match character against an XCLASS        *
dvander@2762: *************************************************/
dvander@2762: 
dvander@2762: /* This function is called to match a character against an extended class that
dvander@2762: might contain values > 255 and/or Unicode properties.
dvander@2762: 
dvander@2762: Arguments:
dvander@2762:   c           the character
dvander@2762:   data        points to the flag byte of the XCLASS data
dvander@2762: 
dvander@2762: Returns:      TRUE if character matches, else FALSE
dvander@2762: */
dvander@2762: 
dvander@2762: BOOL
dvander@2762: _pcre_xclass(int c, const uschar *data)
dvander@2762: {
dvander@2762: int t;
dvander@2762: BOOL negated = (*data & XCL_NOT) != 0;
dvander@2762: 
dvander@2762: /* Character values < 256 are matched against a bitmap, if one is present. If
dvander@2762: not, we still carry on, because there may be ranges that start below 256 in the
dvander@2762: additional data. */
dvander@2762: 
dvander@2762: if (c < 256)
dvander@2762:   {
dvander@2762:   if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
dvander@2762:     return !negated;   /* char found */
dvander@2762:   }
dvander@2762: 
dvander@2762: /* First skip the bit map if present. Then match against the list of Unicode
dvander@2762: properties or large chars or ranges that end with a large char. We won't ever
dvander@2762: encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */
dvander@2762: 
dvander@2762: if ((*data++ & XCL_MAP) != 0) data += 32;
dvander@2762: 
dvander@2762: while ((t = *data++) != XCL_END)
dvander@2762:   {
dvander@2762:   int x, y;
dvander@2762:   if (t == XCL_SINGLE)
dvander@2762:     {
dvander@2762:     GETCHARINC(x, data);
dvander@2762:     if (c == x) return !negated;
dvander@2762:     }
dvander@2762:   else if (t == XCL_RANGE)
dvander@2762:     {
dvander@2762:     GETCHARINC(x, data);
dvander@2762:     GETCHARINC(y, data);
dvander@2762:     if (c >= x && c <= y) return !negated;
dvander@2762:     }
dvander@2762: 
dvander@2762: #ifdef SUPPORT_UCP
dvander@2762:   else  /* XCL_PROP & XCL_NOTPROP */
dvander@2762:     {
dvander@2762:     const ucd_record *prop = GET_UCD(c);
dvander@2762: 
dvander@2762:     switch(*data)
dvander@2762:       {
dvander@2762:       case PT_ANY:
dvander@2762:       if (t == XCL_PROP) return !negated;
dvander@2762:       break;
dvander@2762: 
dvander@2762:       case PT_LAMP:
dvander@2762:       if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || prop->chartype == ucp_Lt) ==
dvander@2762:           (t == XCL_PROP)) return !negated;
dvander@2762:       break;
dvander@2762: 
dvander@2762:       case PT_GC:
dvander@2762:       if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated;
dvander@2762:       break;
dvander@2762: 
dvander@2762:       case PT_PC:
dvander@2762:       if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated;
dvander@2762:       break;
dvander@2762: 
dvander@2762:       case PT_SC:
dvander@2762:       if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated;
dvander@2762:       break;
dvander@2762: 
dvander@2762:       /* This should never occur, but compilers may mutter if there is no
dvander@2762:       default. */
dvander@2762: 
dvander@2762:       default:
dvander@2762:       return FALSE;
dvander@2762:       }
dvander@2762: 
dvander@2762:     data += 2;
dvander@2762:     }
dvander@2762: #endif  /* SUPPORT_UCP */
dvander@2762:   }
dvander@2762: 
dvander@2762: return negated;   /* char did not match */
dvander@2762: }
dvander@2762: 
dvander@2762: /* End of pcre_xclass.c */