/*
 * Copyright (c) 1999
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1999 
 * Boris Fomitchev
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */ 
# include "stlport_prefix.h"

#include <string>
#include <locale>
#include <algorithm>
#include <vector>

__STL_BEGIN_NAMESPACE

_Locale_collate* __acquire_collate(const char* name);
void __release_collate(_Locale_collate* cat);

# ifndef __STL_NO_WCHAR_T

// collate_byname<wchar_t>

collate_byname<wchar_t>::collate_byname(const char* name, size_t refs)
  : collate<wchar_t>(refs),
    _M_collate(__acquire_collate(name))
{
  if (!_M_collate)
    locale::_M_throw_runtime_error();
}

collate_byname<wchar_t>::~collate_byname() 
{
  __release_collate(_M_collate);
}

int collate_byname<wchar_t>::do_compare(const wchar_t* low1,
                                        const wchar_t* high1,
                                        const wchar_t* low2,
                                        const wchar_t* high2) const
{
  return _Locale_strwcmp(_M_collate,
                         low1, high1 - low1, 
                         low2, high2 - low2);
}

collate_byname<wchar_t>::string_type
collate_byname<wchar_t>
  ::do_transform(const wchar_t* low, const wchar_t* high) const
{
  __vector__<wchar_t, allocator<wchar_t> > buf(high - low);
  size_t n = _Locale_strwxfrm(_M_collate,
                              &buf.front(), high - low,
                              low, high - low);
  wchar_t& __c1 = *(buf.begin());
  wchar_t& __c2 = *(buf.begin() + n);
  return string_type( &__c1, &__c2 );
}

# endif /*  __STL_NO_WCHAR_T */

__STL_END_NAMESPACE


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// mode:C++
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