/*************************************************

*      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) 1997-2012 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. It is used by both pcre_exec() and pcre_def_exec(). */

#include "config.h"

#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 and/or Unicode properties.

Arguments:

  c           the character

  data        points to the flag byte of the XCLASS data

Returns:      TRUE if character matches, else FALSE

*/

BOOL

PRIV(xclass)(int c, const pcre_uchar *data, BOOL utf)

{

int t;

BOOL negated = (*data & XCL_NOT) != 0;

(void)utf;

#ifdef COMPILE_PCRE8

/* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */

utf = TRUE;

#endif

/* 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 &&

    (((pcre_uint8 *)(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 / sizeof(pcre_uchar);

while ((t = *data++) != XCL_END)

  {

  int x, y;

  if (t == XCL_SINGLE)

    {

#ifdef SUPPORT_UTF

    if (utf)

      {

      GETCHARINC(x, data); /* macro generates multiple statements */

      }

    else

#endif

      x = *data++;

    if (c == x) return !negated;

    }

  else if (t == XCL_RANGE)

    {

#ifdef SUPPORT_UTF

    if (utf)

      {

      GETCHARINC(x, data); /* macro generates multiple statements */

      GETCHARINC(y, data); /* macro generates multiple statements */

      }

    else

#endif

      {

      x = *data++;

      y = *data++;

      }

    if (c >= x && c <= y) return !negated;

    }

#ifdef SUPPORT_UCP

  else  /* XCL_PROP & XCL_NOTPROP */

    {

    const pcre_uint8 chartype = UCD_CHARTYPE(c);

    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] == PRIV(ucp_gentype)[chartype]) == (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] == UCD_SCRIPT(c)) == (t == XCL_PROP)) return !negated;

      break;

      case PT_ALNUM:

      if ((PRIV(ucp_gentype)[chartype] == ucp_L ||

           PRIV(ucp_gentype)[chartype] == ucp_N) == (t == XCL_PROP))

        return !negated;

      break;

      case PT_SPACE:    /* Perl space */

      if ((PRIV(ucp_gentype)[chartype] == ucp_Z ||

           c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR)

             == (t == XCL_PROP))

        return !negated;

      break;

      case PT_PXSPACE:  /* POSIX space */

      if ((PRIV(ucp_gentype)[chartype] == ucp_Z ||

           c == CHAR_HT || c == CHAR_NL || c == CHAR_VT ||

           c == CHAR_FF || c == CHAR_CR) == (t == XCL_PROP))

        return !negated;

      break;

      case PT_WORD:

      if ((PRIV(ucp_gentype)[chartype] == ucp_L ||

           PRIV(ucp_gentype)[chartype] == ucp_N || c == CHAR_UNDERSCORE)

             == (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 */