stl_hash_fun.h
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上传用户:sichengcw
上传日期:2009-02-17
资源大小:202k
文件大小:3k
源码类别:
STL
开发平台:
Visual C++
- /*
- * Copyright (c) 1996
- * 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 __SGI_STL_HASH_FUN_H
- #define __SGI_STL_HASH_FUN_H
- #include <stddef.h>
- __STL_BEGIN_NAMESPACE
- template <class Key> struct hash { };
- inline size_t __stl_hash_string(const char* s)
- {
- unsigned long h = 0;
- for ( ; *s; ++s)
- h = 5*h + *s;
- return size_t(h);
- }
- __STL_TEMPLATE_NULL struct hash<char*>
- {
- size_t operator()(const char* s) const { return __stl_hash_string(s); }
- };
- __STL_TEMPLATE_NULL struct hash<const char*>
- {
- size_t operator()(const char* s) const { return __stl_hash_string(s); }
- };
- __STL_TEMPLATE_NULL struct hash<char> {
- size_t operator()(char x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<unsigned char> {
- size_t operator()(unsigned char x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<signed char> {
- size_t operator()(unsigned char x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<short> {
- size_t operator()(short x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<unsigned short> {
- size_t operator()(unsigned short x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<int> {
- size_t operator()(int x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<unsigned int> {
- size_t operator()(unsigned int x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<long> {
- size_t operator()(long x) const { return x; }
- };
- __STL_TEMPLATE_NULL struct hash<unsigned long> {
- size_t operator()(unsigned long x) const { return x; }
- };
- __STL_END_NAMESPACE
- #endif /* __SGI_STL_HASH_FUN_H */
- // Local Variables:
- // mode:C++
- // End: