/*

  * 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: