1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/integer/integer_mask.hpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,93 @@
     1.4 +//  Boost integer/integer_mask.hpp header file  ------------------------------//
     1.5 +
     1.6 +//  (C) Copyright Daryle Walker 2001.
     1.7 +//  Distributed under the Boost Software License, Version 1.0. (See
     1.8 +//  accompanying file LICENSE_1_0.txt or copy at
     1.9 +//  http://www.boost.org/LICENSE_1_0.txt)
    1.10 +
    1.11 +//  See http://www.boost.org for updates, documentation, and revision history. 
    1.12 +
    1.13 +#ifndef BOOST_INTEGER_INTEGER_MASK_HPP
    1.14 +#define BOOST_INTEGER_INTEGER_MASK_HPP
    1.15 +
    1.16 +#include <boost/integer_fwd.hpp>  // self include
    1.17 +
    1.18 +#include <boost/config.hpp>   // for BOOST_STATIC_CONSTANT
    1.19 +#include <boost/integer.hpp>  // for boost::uint_t
    1.20 +
    1.21 +#include <climits>  // for UCHAR_MAX, etc.
    1.22 +#include <cstddef>  // for std::size_t
    1.23 +
    1.24 +#include <boost/limits.hpp>  // for std::numeric_limits
    1.25 +
    1.26 +
    1.27 +namespace boost
    1.28 +{
    1.29 +
    1.30 +
    1.31 +//  Specified single-bit mask class declaration  -----------------------------//
    1.32 +//  (Lowest bit starts counting at 0.)
    1.33 +
    1.34 +template < std::size_t Bit >
    1.35 +struct high_bit_mask_t
    1.36 +{
    1.37 +    typedef typename uint_t<(Bit + 1)>::least  least;
    1.38 +    typedef typename uint_t<(Bit + 1)>::fast   fast;
    1.39 +
    1.40 +    BOOST_STATIC_CONSTANT( least, high_bit = (least( 1u ) << Bit) );
    1.41 +    BOOST_STATIC_CONSTANT( fast, high_bit_fast = (fast( 1u ) << Bit) );
    1.42 +
    1.43 +    BOOST_STATIC_CONSTANT( std::size_t, bit_position = Bit );
    1.44 +
    1.45 +};  // boost::high_bit_mask_t
    1.46 +
    1.47 +
    1.48 +//  Specified bit-block mask class declaration  ------------------------------//
    1.49 +//  Makes masks for the lowest N bits
    1.50 +//  (Specializations are needed when N fills up a type.)
    1.51 +
    1.52 +template < std::size_t Bits >
    1.53 +struct low_bits_mask_t
    1.54 +{
    1.55 +    typedef typename uint_t<Bits>::least  least;
    1.56 +    typedef typename uint_t<Bits>::fast   fast;
    1.57 +
    1.58 +    BOOST_STATIC_CONSTANT( least, sig_bits = (~( ~(least( 0u )) << Bits )) );
    1.59 +    BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
    1.60 +
    1.61 +    BOOST_STATIC_CONSTANT( std::size_t, bit_count = Bits );
    1.62 +
    1.63 +};  // boost::low_bits_mask_t
    1.64 +
    1.65 +
    1.66 +#define BOOST_LOW_BITS_MASK_SPECIALIZE( Type )                                  \
    1.67 +  template <  >  struct low_bits_mask_t< std::numeric_limits<Type>::digits >  { \
    1.68 +      typedef std::numeric_limits<Type>           limits_type;                  \
    1.69 +      typedef uint_t<limits_type::digits>::least  least;                        \
    1.70 +      typedef uint_t<limits_type::digits>::fast   fast;                         \
    1.71 +      BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );              \
    1.72 +      BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );            \
    1.73 +      BOOST_STATIC_CONSTANT( std::size_t, bit_count = limits_type::digits );    \
    1.74 +  }
    1.75 +
    1.76 +BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned char );
    1.77 +
    1.78 +#if USHRT_MAX > UCHAR_MAX
    1.79 +BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned short );
    1.80 +#endif
    1.81 +
    1.82 +#if UINT_MAX > USHRT_MAX
    1.83 +BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned int );
    1.84 +#endif
    1.85 +
    1.86 +#if ULONG_MAX > UINT_MAX
    1.87 +BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned long );
    1.88 +#endif
    1.89 +
    1.90 +#undef BOOST_LOW_BITS_MASK_SPECIALIZE
    1.91 +
    1.92 +
    1.93 +}  // namespace boost
    1.94 +
    1.95 +
    1.96 +#endif  // BOOST_INTEGER_INTEGER_MASK_HPP