/home/ntakagi/work/STLport-5.1.5/stlport/stl/_hash_fun.h Go to the documentation of this file. /* * 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:

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