stl_tempbuf.c

粗糙集应用软件

/*
 *
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Copyright (c) 1996,1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1997
 * Moscow Center for SPARC Technology
 *
 * 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 __STL_TEMPBUF_C
#define __STL_TEMPBUF_C

__STL_BEGIN_NAMESPACE

template <class _Tp>
pair<_Tp*, ptrdiff_t> 
__get_temporary_buffer(ptrdiff_t __len, _Tp*)
{
  if (__len > ptrdiff_t(INT_MAX / sizeof(_Tp)))
    __len = INT_MAX / sizeof(_Tp);

  while (__len > 0) {
    _Tp* __tmp = (_Tp*) malloc((size_t)__len * sizeof(_Tp));
    if (__tmp != 0)
      return pair<_Tp*, ptrdiff_t>(__tmp, __len);
    __len /= 2;
  }

  return pair<_Tp*, ptrdiff_t>((_Tp*)0, 0);
}
__STL_END_NAMESPACE

#endif /*  __STL_TEMPBUF_C */

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