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// Locale support -*- C++ -*-

// Copyright (C) 2000, 2003 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 2, 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 General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

//

// ISO C++ 14882: 22.1  Locales

//

// ctype bits to be inlined go here. Non-inlinable (ie virtual do_*)

// functions go in ctype.cc

// The following definitions are portable, but insanely slow. If one

// cares at all about performance, then specialized ctype

// functionality should be added for the native os in question: see

// the config/os/bits/ctype_*.h files.

// Constructing a synthetic "C" table should be seriously considered...

  bool

  ctype<char>::

  is(mask __m, char __c) const

  {

    if (_M_table)

      return _M_table[static_cast<unsigned char>(__c)] & __m;

    else

      {

        bool __ret = false;

        const size_t __bitmasksize = 15;

        size_t __bitcur = 0; // Lowest bitmask in ctype_base == 0

        for (; __bitcur <= __bitmasksize; ++__bitcur)

          {

            const mask __bit = static_cast<mask>(1 << __bitcur);

            if (__m & __bit)

              {

                bool __testis;

                switch (__bit)

                  {

                  case space:

                    __testis = isspace(__c);

                    break;

                  case print:

                    __testis = isprint(__c);

                    break;

                  case cntrl:

                    __testis = iscntrl(__c);

                    break;

                  case upper:

                    __testis = isupper(__c);

                    break;

                  case lower:

                    __testis = islower(__c);

                    break;

                  case alpha:

                    __testis = isalpha(__c);

                    break;

                  case digit:

                    __testis = isdigit(__c);

                    break;

                  case punct:

                    __testis = ispunct(__c);

                    break;

                  case xdigit:

                    __testis = isxdigit(__c);

                    break;

                  case alnum:

                    __testis = isalnum(__c);

                    break;

                  case graph:

                    __testis = isgraph(__c);

                    break;

                  default:

                    __testis = false;

                    break;

                  }

                __ret |= __testis;

              }

          }

        return __ret;

      }

  }

  const char*

  ctype<char>::

  is(const char* __low, const char* __high, mask* __vec) const

  {

    if (_M_table)

      while (__low < __high)

        *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];

    else

      {

        // Highest bitmask in ctype_base == 10.

        const size_t __bitmasksize = 15;

        for (;__low < __high; ++__vec, ++__low)

          {

            mask __m = 0;

            // Lowest bitmask in ctype_base == 0

            size_t __i = 0;

            for (;__i <= __bitmasksize; ++__i)

              {

                const mask __bit = static_cast<mask>(1 << __i);

                if (this->is(__bit, *__low))

                  __m |= __bit;

              }

            *__vec = __m;

          }

      }

    return __high;

  }

  const char*

  ctype<char>::

  scan_is(mask __m, const char* __low, const char* __high) const

  {

    if (_M_table)

      while (__low < __high

             && !(_M_table[static_cast<unsigned char>(*__low)] & __m))

        ++__low;

    else

      while (__low < __high && !this->is(__m, *__low))

        ++__low;

    return __low;

  }

  const char*

  ctype<char>::

  scan_not(mask __m, const char* __low, const char* __high) const

  {

    if (_M_table)

      while (__low < __high

             && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)

        ++__low;

    else

      while (__low < __high && this->is(__m, *__low) != 0)

        ++__low;

    return __low;

  }