Updated boost to v1.55.0

[rsem.git] / boost / integer / integer_mask.hpp

diff --git a/boost/integer/integer_mask.hpp b/boost/integer/integer_mask.hpp
new file mode 100644 (file)
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+++ b/boost/integer/integer_mask.hpp
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+//  Boost integer/integer_mask.hpp header file  ------------------------------//
+
+//  (C) Copyright Daryle Walker 2001.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for updates, documentation, and revision history. 
+
+#ifndef BOOST_INTEGER_INTEGER_MASK_HPP
+#define BOOST_INTEGER_INTEGER_MASK_HPP
+
+#include <boost/integer_fwd.hpp>  // self include
+
+#include <boost/config.hpp>   // for BOOST_STATIC_CONSTANT
+#include <boost/integer.hpp>  // for boost::uint_t
+
+#include <climits>  // for UCHAR_MAX, etc.
+#include <cstddef>  // for std::size_t
+
+#include <boost/limits.hpp>  // for std::numeric_limits
+
+//
+// We simply cannot include this header on gcc without getting copious warnings of the kind:
+//
+// boost/integer/integer_mask.hpp:93:35: warning: use of C99 long long integer constant
+//
+// And yet there is no other reasonable implementation, so we declare this a system header
+// to suppress these warnings.
+//
+#if defined(__GNUC__) && (__GNUC__ >= 4)
+#pragma GCC system_header
+#endif
+
+namespace boost
+{
+
+
+//  Specified single-bit mask class declaration  -----------------------------//
+//  (Lowest bit starts counting at 0.)
+
+template < std::size_t Bit >
+struct high_bit_mask_t
+{
+    typedef typename uint_t<(Bit + 1)>::least  least;
+    typedef typename uint_t<(Bit + 1)>::fast   fast;
+
+    BOOST_STATIC_CONSTANT( least, high_bit = (least( 1u ) << Bit) );
+    BOOST_STATIC_CONSTANT( fast, high_bit_fast = (fast( 1u ) << Bit) );
+
+    BOOST_STATIC_CONSTANT( std::size_t, bit_position = Bit );
+
+};  // boost::high_bit_mask_t
+
+
+//  Specified bit-block mask class declaration  ------------------------------//
+//  Makes masks for the lowest N bits
+//  (Specializations are needed when N fills up a type.)
+
+template < std::size_t Bits >
+struct low_bits_mask_t
+{
+    typedef typename uint_t<Bits>::least  least;
+    typedef typename uint_t<Bits>::fast   fast;
+
+    BOOST_STATIC_CONSTANT( least, sig_bits = (~( ~(least( 0u )) << Bits )) );
+    BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+
+    BOOST_STATIC_CONSTANT( std::size_t, bit_count = Bits );
+
+};  // boost::low_bits_mask_t
+
+
+#define BOOST_LOW_BITS_MASK_SPECIALIZE( Type )                                  \
+  template <  >  struct low_bits_mask_t< std::numeric_limits<Type>::digits >  { \
+      typedef std::numeric_limits<Type>           limits_type;                  \
+      typedef uint_t<limits_type::digits>::least  least;                        \
+      typedef uint_t<limits_type::digits>::fast   fast;                         \
+      BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );              \
+      BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );            \
+      BOOST_STATIC_CONSTANT( std::size_t, bit_count = limits_type::digits );    \
+  }
+
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4245)  // 'initializing' : conversion from 'int' to 'const boost::low_bits_mask_t<8>::least', signed/unsigned mismatch
+#endif
+
+BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned char );
+
+#if USHRT_MAX > UCHAR_MAX
+BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned short );
+#endif
+
+#if UINT_MAX > USHRT_MAX
+BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned int );
+#endif
+
+#if ULONG_MAX > UINT_MAX
+BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned long );
+#endif
+
+#if defined(BOOST_HAS_LONG_LONG)
+    #if ((defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)) ||\
+        (defined(ULONG_LONG_MAX) && (ULONG_LONG_MAX > ULONG_MAX)) ||\
+        (defined(ULONGLONG_MAX) && (ULONGLONG_MAX > ULONG_MAX)) ||\
+        (defined(_ULLONG_MAX) && (_ULLONG_MAX > ULONG_MAX)))
+    BOOST_LOW_BITS_MASK_SPECIALIZE( boost::ulong_long_type );
+    #endif
+#elif defined(BOOST_HAS_MS_INT64)
+    #if 18446744073709551615ui64 > ULONG_MAX
+    BOOST_LOW_BITS_MASK_SPECIALIZE( unsigned __int64 );
+    #endif
+#endif
+
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
+#undef BOOST_LOW_BITS_MASK_SPECIALIZE
+
+
+}  // namespace boost
+
+
+#endif  // BOOST_INTEGER_INTEGER_MASK_HPP