include/c++/stlport/stl/_tempbuf.c

   1 /*
   2  *
   3  *
   4  * Copyright (c) 1994
   5  * Hewlett-Packard Company
   6  *
   7  * Copyright (c) 1996,1997
   8  * Silicon Graphics Computer Systems, Inc.
   9  *
  10  * Copyright (c) 1997
  11  * Moscow Center for SPARC Technology
  12  *
  13  * Copyright (c) 1999
  14  * Boris Fomitchev
  15  *
  16  * This material is provided "as is", with absolutely no warranty expressed
  17  * or implied. Any use is at your own risk.
  18  *
  19  * Permission to use or copy this software for any purpose is hereby granted
  20  * without fee, provided the above notices are retained on all copies.
  21  * Permission to modify the code and to distribute modified code is granted,
  22  * provided the above notices are retained, and a notice that the code was
  23  * modified is included with the above copyright notice.
  24  *
  25  */
  26 #ifndef _STLP_TEMPBUF_C
  27 #define _STLP_TEMPBUF_C
  28
  29 #ifndef _STLP_INTERNAL_TEMPBUF_H
  30 # include <stl/_tempbuf.h>
  31 #endif
  32
  33 _STLP_BEGIN_NAMESPACE
  34
  35 template <class _Tp>
  36 pair<_Tp*, ptrdiff_t> _STLP_CALL
  37 __get_temporary_buffer(ptrdiff_t __len, _Tp*)
  38 {
  39   if (__len > ptrdiff_t(INT_MAX / sizeof(_Tp)))
  40     __len = INT_MAX / sizeof(_Tp);
  41
  42   while (__len > 0) {
  43     _Tp* __tmp = (_Tp*) malloc((size_t)__len * sizeof(_Tp));
  44     if (__tmp != 0)
  45       return pair<_Tp*, ptrdiff_t>(__tmp, __len);
  46     __len /= 2;
  47   }
  48
  49   return pair<_Tp*, ptrdiff_t>((_Tp*)0, 0);
  50 }
  51 _STLP_END_NAMESPACE
  52
  53 #endif /*  _STLP_TEMPBUF_C */
  54
  55 // Local Variables:
  56 // mode:C++
  57 // End: