epoc32/include/stdapis/stlportv5/stl/_string_hash.h
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
changeset 4 837f303aceeb
parent 3 e1b950c65cb4
permissions -rw-r--r--
Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
williamr@2
     1
/*
williamr@2
     2
 * Copyright (c) 1997-1999
williamr@2
     3
 * Silicon Graphics Computer Systems, Inc.
williamr@2
     4
 *
williamr@4
     5
 * Copyright (c) 1999
williamr@2
     6
 * Boris Fomitchev
williamr@2
     7
 *
williamr@2
     8
 * This material is provided "as is", with absolutely no warranty expressed
williamr@2
     9
 * or implied. Any use is at your own risk.
williamr@2
    10
 *
williamr@4
    11
 * Permission to use or copy this software for any purpose is hereby granted
williamr@2
    12
 * without fee, provided the above notices are retained on all copies.
williamr@2
    13
 * Permission to modify the code and to distribute modified code is granted,
williamr@2
    14
 * provided the above notices are retained, and a notice that the code was
williamr@2
    15
 * modified is included with the above copyright notice.
williamr@2
    16
 *
williamr@2
    17
 */
williamr@2
    18
williamr@2
    19
#ifndef _STLP_STRING_HASH_H
williamr@4
    20
#define _STLP_STRING_HASH_H
williamr@2
    21
williamr@2
    22
#ifndef _STLP_HASH_FUN_H
williamr@2
    23
# include <stl/_hash_fun.h>
williamr@2
    24
#endif
williamr@2
    25
williamr@4
    26
#ifndef _STLP_INTERNAL_STRING_H
williamr@2
    27
# include <stl/_string.h>
williamr@2
    28
#endif
williamr@2
    29
williamr@2
    30
_STLP_BEGIN_NAMESPACE
williamr@2
    31
williamr@2
    32
template <class _CharT, class _Traits, class _Alloc>
williamr@2
    33
_STLP_INLINE_LOOP size_t
williamr@2
    34
__stl_string_hash(const basic_string<_CharT,_Traits,_Alloc>& __s) {
williamr@2
    35
  unsigned long __h = 0;
williamr@2
    36
  size_t __len = __s.size();
williamr@2
    37
  const _CharT* __data = __s.data();
williamr@2
    38
  for ( size_t __i = 0; __i < __len; ++__i)
williamr@4
    39
    __h = /* 5 *__h */(__h << 2) + __h + __data[__i];
williamr@2
    40
  return size_t(__h);
williamr@2
    41
}
williamr@2
    42
williamr@4
    43
#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
williamr@2
    44
williamr@2
    45
template <class _CharT, class _Traits, class _Alloc>
williamr@2
    46
struct hash<basic_string<_CharT,_Traits,_Alloc> > {
williamr@2
    47
  size_t operator()(const basic_string<_CharT,_Traits,_Alloc>& __s) const
williamr@2
    48
    { return __stl_string_hash(__s); }
williamr@2
    49
};
williamr@2
    50
williamr@2
    51
#else
williamr@2
    52
williamr@4
    53
_STLP_TEMPLATE_NULL
williamr@4
    54
struct _STLP_CLASS_DECLSPEC hash<string> {
williamr@2
    55
  size_t operator()(const string& __s) const
williamr@2
    56
    { return __stl_string_hash(__s); }
williamr@2
    57
};
williamr@2
    58
williamr@4
    59
#  if defined (_STLP_HAS_WCHAR_T)
williamr@4
    60
_STLP_TEMPLATE_NULL
williamr@4
    61
struct _STLP_CLASS_DECLSPEC hash<wstring> {
williamr@2
    62
  size_t operator()(const wstring& __s) const
williamr@2
    63
    { return __stl_string_hash(__s); }
williamr@2
    64
};
williamr@4
    65
#  endif
williamr@2
    66
williamr@2
    67
#endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
williamr@2
    68
williamr@2
    69
_STLP_END_NAMESPACE
williamr@2
    70
williamr@2
    71
#endif