/*

  * Copyright (c) 1997-1999

  * 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.

  *

  */

 #ifndef _STLP_STRING_HASH_H

 # define _STLP_STRING_HASH_H

 #ifndef _STLP_HASH_FUN_H

 # include <stl/_hash_fun.h>

 #endif

 #ifndef _STLP_STRING_H

 # include <stl/_string.h>

 #endif

 _STLP_BEGIN_NAMESPACE

 template <class _CharT, class _Traits, class _Alloc>

 _STLP_INLINE_LOOP size_t

 __stl_string_hash(const basic_string<_CharT,_Traits,_Alloc>& __s) {

   unsigned long __h = 0;

   typedef typename basic_string<_CharT,_Traits,_Alloc>::const_pointer const_ptr;

   size_t __len = __s.size();

   const _CharT* __data = __s.data();

   for ( size_t __i = 0; __i < __len; ++__i)

     __h = 5*__h + __data[__i];

   return size_t(__h);

 }

 #ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION

 template <class _CharT, class _Traits, class _Alloc>

 struct hash<basic_string<_CharT,_Traits,_Alloc> > {

   size_t operator()(const basic_string<_CharT,_Traits,_Alloc>& __s) const

     { return __stl_string_hash(__s); }

 };

 #else

 _STLP_TEMPLATE_NULL struct _STLP_CLASS_DECLSPEC hash<string> {

   size_t operator()(const string& __s) const

     { return __stl_string_hash(__s); }

 };

 # if defined (_STLP_HAS_WCHAR_T)

 _STLP_TEMPLATE_NULL struct _STLP_CLASS_DECLSPEC hash<wstring> {

   size_t operator()(const wstring& __s) const

     { return __stl_string_hash(__s); }

 };

 # endif

 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */

 _STLP_END_NAMESPACE

 #endif