huwcampbell.com
Reactos
1/*
2 * Copyright (c) 1998
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
18
19#ifndef _STLP_BITSET
20
21// This implementation of bitset<> has a second template parameter,
22// _WordT, which defaults to unsigned long. *YOU SHOULD NOT USE
23// THIS FEATURE*. It is experimental, and it may be removed in
24// future releases.
25
26// A bitset of size N, using words of type _WordT, will have
27// N % (sizeof(_WordT) * CHAR_BIT) unused bits. (They are the high-
28// order bits in the highest word.) It is a class invariant
29// of class bitset<> that those unused bits are always zero.
30
31// Most of the actual code isn't contained in bitset<> itself, but in the
32// base class _Base_bitset. The base class works with whole words, not with
33// individual bits. This allows us to specialize _Base_bitset for the
34// important special case where the bitset is only a single word.
35
36// The C++ standard does not define the precise semantics of operator[].
37// In this implementation the const version of operator[] is equivalent
38// to test(), except that it does no range checking. The non-const version
39// returns a reference to a bit, again without doing any range checking.
40
41#ifndef _STLP_OUTERMOST_HEADER_ID
42# define _STLP_OUTERMOST_HEADER_ID 0x2
43# include <stl/_prolog.h>
44# define _STLP_BITSET
45#endif
46
47#if (_STLP_OUTERMOST_HEADER_ID == 0x2)
48# ifndef _STLP_INTERNAL_BITSET
49# include <stl/_bitset.h>
50# endif
51#endif
52
53#if (_STLP_OUTERMOST_HEADER_ID != 0x2) || defined (_STLP_IMPORT_VENDOR_STD)
54# if defined (_STLP_HAS_INCLUDE_NEXT)
55# include_next <bitset>
56# else
57# include _STLP_NATIVE_HEADER(bitset)
58# endif
59#endif
60
61#if (_STLP_OUTERMOST_HEADER_ID == 0x2 )
62# include <stl/_epilog.h>
63# undef _STLP_OUTERMOST_HEADER_ID
64#endif
65
66#endif /* _STLP_BITSET */
67
68// Local Variables:
69// mode:C++
70// End: