/*

 * Copyright (c) 1996-1998

 * Silicon Graphics Computer Systems, Inc.

 *

 * Permission to use, copy, modify, distribute and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appear in all copies and

 * that both that copyright notice and this permission notice appear

 * in supporting documentation.  Silicon Graphics makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 *

 * Copyright (c) 1994

 * Hewlett-Packard Company

 *

 * Permission to use, copy, modify, distribute and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appear in all copies and

 * that both that copyright notice and this permission notice appear

 * in supporting documentation.  Hewlett-Packard Company makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 */

/* NOTE: This is an internal header file, included by other STL headers.

 *   You should not attempt to use it directly.

 */

#ifndef _STLP_HASH_FUN_H

#define _STLP_HASH_FUN_H

#ifndef _STLP_INTERNAL_CSTDDEF

#  include <stl/_cstddef.h>

#endif

_STLP_BEGIN_NAMESPACE

template <class _Key> struct hash { };

_STLP_MOVE_TO_PRIV_NAMESPACE

inline size_t __stl_hash_string(const char* __s) {

  _STLP_FIX_LITERAL_BUG(__s)

  unsigned long __h = 0;

  for ( ; *__s; ++__s)

    __h = 5*__h + *__s;

  return size_t(__h);

}

_STLP_MOVE_TO_STD_NAMESPACE

_STLP_TEMPLATE_NULL

struct hash<char*> {

  size_t operator()(const char* __s) const {

    _STLP_FIX_LITERAL_BUG(__s)

    return _STLP_PRIV __stl_hash_string(__s);

  }

};

_STLP_TEMPLATE_NULL

struct hash<const char*> {

  size_t operator()(const char* __s) const {

    _STLP_FIX_LITERAL_BUG(__s)

    return _STLP_PRIV __stl_hash_string(__s);

  }

};

_STLP_TEMPLATE_NULL struct hash<char> {

  size_t operator()(char __x) const { return __x; }

};

_STLP_TEMPLATE_NULL struct hash<unsigned char> {

  size_t operator()(unsigned char __x) const { return __x; }

};

#if !defined (_STLP_NO_SIGNED_BUILTINS)

_STLP_TEMPLATE_NULL struct hash<signed char> {

  size_t operator()(unsigned char __x) const { return __x; }

};

#endif

_STLP_TEMPLATE_NULL struct hash<short> {

  size_t operator()(short __x) const { return __x; }

};

_STLP_TEMPLATE_NULL struct hash<unsigned short> {

  size_t operator()(unsigned short __x) const { return __x; }

};

_STLP_TEMPLATE_NULL struct hash<int> {

  size_t operator()(int __x) const { return __x; }

};

#if defined (_WIN64) || !defined (_STLP_MSVC) || (_STLP_MSVC < 1300)

_STLP_TEMPLATE_NULL struct hash<unsigned int> {

  size_t operator()(unsigned int __x) const { return __x; }

};

#else

/* MSVC .Net since 2002 has a 64 bits portability warning feature. typedef

 * like size_t are tagged as potential 64 bits variables making them different from

 * unsigned int. To avoid the warning when a hash container is instanciated with

 * the size_t key we prefer to grant the size_t specialization rather than the

 * unsigned int one.

 */

_STLP_TEMPLATE_NULL struct hash<size_t> {

  size_t operator()(size_t __x) const { return __x; }

};

#endif

_STLP_TEMPLATE_NULL struct hash<long> {

  size_t operator()(long __x) const { return __x; }

};

_STLP_TEMPLATE_NULL struct hash<unsigned long> {

  size_t operator()(unsigned long __x) const { return __x; }

};

#if defined (_STLP_LONG_LONG)

_STLP_TEMPLATE_NULL struct hash<_STLP_LONG_LONG> {

  size_t operator()(_STLP_LONG_LONG x) const { return (size_t)x; }

};

_STLP_TEMPLATE_NULL struct hash<unsigned _STLP_LONG_LONG> {

  size_t operator()(unsigned _STLP_LONG_LONG x) const { return (size_t)x; }

};

#endif

_STLP_TEMPLATE_NULL

struct hash<void *>

{

    union __vp {

        size_t s;

        void  *p;

    };

    size_t operator()(void *__x) const

      {

        __vp vp;

        vp.p = __x;

        return vp.s;

      }

};

_STLP_END_NAMESPACE

#endif /* _STLP_HASH_FUN_H */

// Local Variables:

// mode:C++

// End: