| /* |
| * 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 (_STLP_MSVC) || (_STLP_MSVC < 1300) || defined (_WIN64) |
| _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: |