string

粗糙集应用软件

/*
 * Copyright (c) 1997-1999
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1999 
 * Boris Fomitchev
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */

#ifndef __SGI_STL_STRING
#define __SGI_STL_STRING

# ifndef __STL_CONFIG_H
#  include <stl_config.h>
# endif

#ifndef __SGI_STL_HASH_FUN_H
# include <stl_hash_fun.h>
#endif

#ifdef __STL_USE_NATIVE_STRING

# if defined (__STL_MSVC)
// lower #ifdef level
#  include <use_ansi.h>
#  include <iterator>
#  include <streambuf>
#  include <istream>
# endif

// STLport uses native string if new iostreams are being used, 
// as part of compiled runtime library depends on it.
// Edit relative path below (or put full path) to get native <string> included.
// DO NOT use SGI <string> with native <iostream> unless you recompile 
// standard C++ runtime library with STLport installed. 

#  include __STL_NATIVE_HEADER(string)

# endif /* __STL_USE_NATIVE_STRING */

# if !defined (__STL_USE_NATIVE_STRING) || defined (__STL_USE_OWN_NAMESPACE)

# include <stl_string.h>

# endif /*__STL_USE_NATIVE_STRING */

# if defined (__STL_DEBUG) && ( !defined (__STL_USE_NATIVE_STRING) || defined (__STL_USE_OWN_NAMESPACE))
#  define _Make_ptr(__i)   (__i)._M_iterator
# else
#  define _Make_ptr(__i)   __i
# endif

__STL_BEGIN_NAMESPACE

template <class _CharT, class _Traits, class _Alloc>
__STL_INLINE_LOOP size_t 
__stl_string_hash(const basic_string<_CharT,_Traits,_Alloc>& __s) {
  unsigned long __h = 0; 
  typedef typename basic_string<_CharT,_Traits,_Alloc>::const_pointer const_ptr;
  for ( const_ptr __i = _Make_ptr(__s.begin());
       __i != _Make_ptr(__s.end());
       ++__i)
    __h = 5*__h + *__i;
  return size_t(__h);
}

#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION

template <class _CharT, class _Traits, class _Alloc>
struct hash<basic_string<_CharT,_Traits,_Alloc> > {
  size_t operator()(const basic_string<_CharT,_Traits,_Alloc>& __s) const
    { return __stl_string_hash(__s); }
};

#else

__STL_TEMPLATE_NULL struct hash<string> {
  size_t operator()(const string& __s) const
    { return __stl_string_hash(__s); }
};

# if defined (__STL_HAS_WCHAR_T)
__STL_TEMPLATE_NULL struct hash<wstring> {
  size_t operator()(const wstring& __s) const
    { return __stl_string_hash(__s); }
};
# endif

#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */

__STL_END_NAMESPACE

// cleanup

# ifndef __IBMCPP__
#  undef _Make_ptr
# endif

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma reset woff 1174
#pragma reset woff 1375
#endif

#endif /* __SGI_STL_STRING */


// Local Variables:
// mode:C++
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