williamr@2: /*
williamr@2:  * Copyright (c) 1996-1998
williamr@2:  * Silicon Graphics Computer Systems, Inc.
williamr@2:  *
williamr@2:  * Permission to use, copy, modify, distribute and sell this software
williamr@2:  * and its documentation for any purpose is hereby granted without fee,
williamr@2:  * provided that the above copyright notice appear in all copies and
williamr@2:  * that both that copyright notice and this permission notice appear
williamr@2:  * in supporting documentation.  Silicon Graphics makes no
williamr@2:  * representations about the suitability of this software for any
williamr@2:  * purpose.  It is provided "as is" without express or implied warranty.
williamr@2:  *
williamr@2:  *
williamr@2:  * Copyright (c) 1994
williamr@2:  * Hewlett-Packard Company
williamr@2:  *
williamr@2:  * Permission to use, copy, modify, distribute and sell this software
williamr@2:  * and its documentation for any purpose is hereby granted without fee,
williamr@2:  * provided that the above copyright notice appear in all copies and
williamr@2:  * that both that copyright notice and this permission notice appear
williamr@2:  * in supporting documentation.  Hewlett-Packard Company makes no
williamr@2:  * representations about the suitability of this software for any
williamr@2:  * purpose.  It is provided "as is" without express or implied warranty.
williamr@2:  *
williamr@2:  */
williamr@2: 
williamr@2: /* NOTE: This is an internal header file, included by other STL headers.
williamr@2:  *   You should not attempt to use it directly.
williamr@2:  */
williamr@2: 
williamr@2: #ifndef _STLP_HASH_FUN_H
williamr@2: #define _STLP_HASH_FUN_H
williamr@2: 
williamr@2: # ifndef _STLP_CSTDDEF
williamr@2: #  include <cstddef>
williamr@2: # endif
williamr@2: 
williamr@2: _STLP_BEGIN_NAMESPACE
williamr@2: 
williamr@2: template <class _Key> struct hash { };
williamr@2: 
williamr@2: inline size_t __stl_hash_string(const char* __s)
williamr@2: {
williamr@2:   _STLP_FIX_LITERAL_BUG(__s)
williamr@2:   unsigned long __h = 0; 
williamr@2:   for ( ; *__s; ++__s)
williamr@2:     __h = 5*__h + *__s;
williamr@2:   
williamr@2:   return size_t(__h);
williamr@2: }
williamr@2: 
williamr@2: _STLP_TEMPLATE_NULL struct hash<char*>
williamr@2: {
williamr@2:   size_t operator()(const char* __s) const { _STLP_FIX_LITERAL_BUG(__s) return __stl_hash_string(__s); }
williamr@2: };
williamr@2: 
williamr@2: _STLP_TEMPLATE_NULL struct hash<const char*>
williamr@2: {
williamr@2:   size_t operator()(const char* __s) const { _STLP_FIX_LITERAL_BUG(__s) return __stl_hash_string(__s); }
williamr@2: };
williamr@2: 
williamr@2: _STLP_TEMPLATE_NULL struct hash<char> {
williamr@2:   size_t operator()(char __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<unsigned char> {
williamr@2:   size_t operator()(unsigned char __x) const { return __x; }
williamr@2: };
williamr@2: #ifndef _STLP_NO_SIGNED_BUILTINS
williamr@2: _STLP_TEMPLATE_NULL struct hash<signed char> {
williamr@2:   size_t operator()(unsigned char __x) const { return __x; }
williamr@2: };
williamr@2: #endif
williamr@2: _STLP_TEMPLATE_NULL struct hash<short> {
williamr@2:   size_t operator()(short __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<unsigned short> {
williamr@2:   size_t operator()(unsigned short __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<int> {
williamr@2:   size_t operator()(int __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<unsigned int> {
williamr@2:   size_t operator()(unsigned int __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<long> {
williamr@2:   size_t operator()(long __x) const { return __x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<unsigned long> {
williamr@2:   size_t operator()(unsigned long __x) const { return __x; }
williamr@2: };
williamr@2: 
williamr@2: # if defined (_STLP_LONG_LONG)
williamr@2: _STLP_TEMPLATE_NULL struct hash<_STLP_LONG_LONG> {
williamr@2:   size_t operator()(long x) const { return x; }
williamr@2: };
williamr@2: _STLP_TEMPLATE_NULL struct hash<unsigned _STLP_LONG_LONG> {
williamr@2:   size_t operator()(unsigned long x) const { return x; }
williamr@2: };
williamr@2: # endif
williamr@2: 
williamr@2: _STLP_END_NAMESPACE
williamr@2: 
williamr@2: #endif /* _STLP_HASH_FUN_H */
williamr@2: 
williamr@2: // Local Variables:
williamr@2: // mode:C++
williamr@2: // End: