comparison DEPENDENCIES/generic/include/boost/crc.hpp @ 16:2665513ce2d3

Add boost headers

+//  Boost CRC library crc.hpp header file  -----------------------------------//
+
+//  Copyright 2001, 2004 Daryle Walker.  Use, modification, and distribution are
+//  subject to the Boost Software License, Version 1.0.  (See accompanying file
+//  LICENSE_1_0.txt or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
+
+//  See <http://www.boost.org/libs/crc/> for the library's home page.
+
+#ifndef BOOST_CRC_HPP
+#define BOOST_CRC_HPP
+
+#include <boost/config.hpp>   // for BOOST_STATIC_CONSTANT, etc.
+#include <boost/integer.hpp>  // for boost::uint_t
+
+#include <climits>  // for CHAR_BIT, etc.
+#include <cstddef>  // for std::size_t
+
+#include <boost/limits.hpp>  // for std::numeric_limits
+
+
+// The type of CRC parameters that can go in a template should be related
+// on the CRC's bit count.  This macro expresses that type in a compact
+// form, but also allows an alternate type for compilers that don't support
+// dependent types (in template value-parameters).
+#if !(defined(BOOST_NO_DEPENDENT_TYPES_IN_TEMPLATE_VALUE_PARAMETERS) || (defined(BOOST_MSVC) && (BOOST_MSVC <= 1300)))
+#define BOOST_CRC_PARM_TYPE  typename ::boost::uint_t<Bits>::fast
+#else
+#define BOOST_CRC_PARM_TYPE  unsigned long
+#endif
+
+// Some compilers [MS VC++ 6] cannot correctly set up several versions of a
+// function template unless every template argument can be unambiguously
+// deduced from the function arguments.  (The bug is hidden if only one version
+// is needed.)  Since all of the CRC function templates have this problem, the
+// workaround is to make up a dummy function argument that encodes the template
+// arguments.  Calls to such template functions need all their template
+// arguments explicitly specified.  At least one compiler that needs this
+// workaround also needs the default value for the dummy argument to be
+// specified in the definition.
+#if defined(__GNUC__) || !defined(BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS)
+#define BOOST_CRC_DUMMY_PARM_TYPE
+#define BOOST_CRC_DUMMY_INIT
+#define BOOST_ACRC_DUMMY_PARM_TYPE
+#define BOOST_ACRC_DUMMY_INIT
+#else
+namespace boost { namespace detail {
+    template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+     BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+     bool ReflectIn, bool ReflectRem >
+    struct dummy_crc_argument  { };
+} }
+#define BOOST_CRC_DUMMY_PARM_TYPE   , detail::dummy_crc_argument<Bits, \
+ TruncPoly, InitRem, FinalXor, ReflectIn, ReflectRem> *p_
+#define BOOST_CRC_DUMMY_INIT        BOOST_CRC_DUMMY_PARM_TYPE = 0
+#define BOOST_ACRC_DUMMY_PARM_TYPE  , detail::dummy_crc_argument<Bits, \
+ TruncPoly, 0, 0, false, false> *p_
+#define BOOST_ACRC_DUMMY_INIT       BOOST_ACRC_DUMMY_PARM_TYPE = 0
+#endif
+
+
+namespace boost
+{
+
+
+//  Forward declarations  ----------------------------------------------------//
+
+template < std::size_t Bits >
+    class crc_basic;
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly = 0u,
+           BOOST_CRC_PARM_TYPE InitRem = 0u,
+           BOOST_CRC_PARM_TYPE FinalXor = 0u, bool ReflectIn = false,
+           bool ReflectRem = false >
+    class crc_optimal;
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+    typename uint_t<Bits>::fast  crc( void const *buffer,
+     std::size_t byte_count
+     BOOST_CRC_DUMMY_PARM_TYPE );
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly >
+    typename uint_t<Bits>::fast  augmented_crc( void const *buffer,
+     std::size_t byte_count, typename uint_t<Bits>::fast initial_remainder
+     BOOST_ACRC_DUMMY_PARM_TYPE );
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly >
+    typename uint_t<Bits>::fast  augmented_crc( void const *buffer,
+     std::size_t byte_count
+     BOOST_ACRC_DUMMY_PARM_TYPE );
+
+typedef crc_optimal<16, 0x8005, 0, 0, true, true>         crc_16_type;
+typedef crc_optimal<16, 0x1021, 0xFFFF, 0, false, false>  crc_ccitt_type;
+typedef crc_optimal<16, 0x8408, 0, 0, true, true>         crc_xmodem_type;
+
+typedef crc_optimal<32, 0x04C11DB7, 0xFFFFFFFF, 0xFFFFFFFF, true, true>
+  crc_32_type;
+
+
+//  Forward declarations for implementation detail stuff  --------------------//
+//  (Just for the stuff that will be needed for the next two sections)
+
+namespace detail
+{
+    template < std::size_t Bits >
+        struct mask_uint_t;
+
+    template <  >
+        struct mask_uint_t< std::numeric_limits<unsigned char>::digits >;
+
+    #if USHRT_MAX > UCHAR_MAX
+    template <  >
+        struct mask_uint_t< std::numeric_limits<unsigned short>::digits >;
+    #endif
+
+    #if UINT_MAX > USHRT_MAX
+    template <  >
+        struct mask_uint_t< std::numeric_limits<unsigned int>::digits >;
+    #endif
+
+    #if ULONG_MAX > UINT_MAX
+    template <  >
+        struct mask_uint_t< std::numeric_limits<unsigned long>::digits >;
+    #endif
+
+    template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly, bool Reflect >
+        struct crc_table_t;
+
+    template < std::size_t Bits, bool DoReflect >
+        class crc_helper;
+
+    #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    template < std::size_t Bits >
+        class crc_helper< Bits, false >;
+    #endif
+
+}  // namespace detail
+
+
+//  Simple cyclic redundancy code (CRC) class declaration  -------------------//
+
+template < std::size_t Bits >
+class crc_basic
+{
+    // Implementation type
+    typedef detail::mask_uint_t<Bits>  masking_type;
+
+public:
+    // Type
+    typedef typename masking_type::least  value_type;
+
+    // Constant for the template parameter
+    BOOST_STATIC_CONSTANT( std::size_t, bit_count = Bits );
+
+    // Constructor
+    explicit  crc_basic( value_type truncated_polynominal,
+               value_type initial_remainder = 0, value_type final_xor_value = 0,
+               bool reflect_input = false, bool reflect_remainder = false );
+
+    // Internal Operations
+    value_type  get_truncated_polynominal() const;
+    value_type  get_initial_remainder() const;
+    value_type  get_final_xor_value() const;
+    bool        get_reflect_input() const;
+    bool        get_reflect_remainder() const;
+
+    value_type  get_interim_remainder() const;
+    void        reset( value_type new_rem );
+    void        reset();
+
+    // External Operations
+    void  process_bit( bool bit );
+    void  process_bits( unsigned char bits, std::size_t bit_count );
+    void  process_byte( unsigned char byte );
+    void  process_block( void const *bytes_begin, void const *bytes_end );
+    void  process_bytes( void const *buffer, std::size_t byte_count );
+
+    value_type  checksum() const;
+
+private:
+    // Member data
+    value_type  rem_;
+    value_type  poly_, init_, final_;  // non-const to allow assignability
+    bool        rft_in_, rft_out_;     // non-const to allow assignability
+
+};  // boost::crc_basic
+
+
+//  Optimized cyclic redundancy code (CRC) class declaration  ----------------//
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+class crc_optimal
+{
+    // Implementation type
+    typedef detail::mask_uint_t<Bits>  masking_type;
+
+public:
+    // Type
+    typedef typename masking_type::fast  value_type;
+
+    // Constants for the template parameters
+    BOOST_STATIC_CONSTANT( std::size_t, bit_count = Bits );
+    BOOST_STATIC_CONSTANT( value_type, truncated_polynominal = TruncPoly );
+    BOOST_STATIC_CONSTANT( value_type, initial_remainder = InitRem );
+    BOOST_STATIC_CONSTANT( value_type, final_xor_value = FinalXor );
+    BOOST_STATIC_CONSTANT( bool, reflect_input = ReflectIn );
+    BOOST_STATIC_CONSTANT( bool, reflect_remainder = ReflectRem );
+
+    // Constructor
+    explicit  crc_optimal( value_type init_rem = InitRem );
+
+    // Internal Operations
+    value_type  get_truncated_polynominal() const;
+    value_type  get_initial_remainder() const;
+    value_type  get_final_xor_value() const;
+    bool        get_reflect_input() const;
+    bool        get_reflect_remainder() const;
+
+    value_type  get_interim_remainder() const;
+    void        reset( value_type new_rem = InitRem );
+
+    // External Operations
+    void  process_byte( unsigned char byte );
+    void  process_block( void const *bytes_begin, void const *bytes_end );
+    void  process_bytes( void const *buffer, std::size_t byte_count );
+
+    value_type  checksum() const;
+
+    // Operators
+    void        operator ()( unsigned char byte );
+    value_type  operator ()() const;
+
+private:
+    // The implementation of output reflection depends on both reflect states.
+    BOOST_STATIC_CONSTANT( bool, reflect_output = (ReflectRem != ReflectIn) );
+
+    #ifndef __BORLANDC__
+    #define BOOST_CRC_REF_OUT_VAL  reflect_output
+    #else
+    typedef crc_optimal  self_type;
+    #define BOOST_CRC_REF_OUT_VAL  (self_type::reflect_output)
+    #endif
+
+    // More implementation types
+    typedef detail::crc_table_t<Bits, TruncPoly, ReflectIn>  crc_table_type;
+    typedef detail::crc_helper<Bits, ReflectIn>              helper_type;
+    typedef detail::crc_helper<Bits, BOOST_CRC_REF_OUT_VAL>  reflect_out_type;
+
+    #undef BOOST_CRC_REF_OUT_VAL
+
+    // Member data
+    value_type  rem_;
+
+};  // boost::crc_optimal
+
+
+//  Implementation detail stuff  ---------------------------------------------//
+
+namespace detail
+{
+    // Forward declarations for more implementation details
+    template < std::size_t Bits >
+        struct high_uint_t;
+
+    template < std::size_t Bits >
+        struct reflector;
+
+
+    // Traits class for mask; given the bit number
+    // (1-based), get the mask for that bit by itself.
+    template < std::size_t Bits >
+    struct high_uint_t
+        : boost::uint_t< Bits >
+    {
+        typedef boost::uint_t<Bits>        base_type;
+        typedef typename base_type::least  least;
+        typedef typename base_type::fast   fast;
+
+#if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 243
+        static const least high_bit = 1ul << ( Bits - 1u );
+        static const fast high_bit_fast = 1ul << ( Bits - 1u );
+#else
+        BOOST_STATIC_CONSTANT( least, high_bit = (least( 1u ) << ( Bits
+         - 1u )) );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = (fast( 1u ) << ( Bits
+         - 1u )) );
+#endif
+
+    };  // boost::detail::high_uint_t
+
+
+    // Reflection routine class wrapper
+    // (since MS VC++ 6 couldn't handle the unwrapped version)
+    template < std::size_t Bits >
+    struct reflector
+    {
+        typedef typename boost::uint_t<Bits>::fast  value_type;
+
+        static  value_type  reflect( value_type x );
+
+    };  // boost::detail::reflector
+
+    // Function that reflects its argument
+    template < std::size_t Bits >
+    typename reflector<Bits>::value_type
+    reflector<Bits>::reflect
+    (
+        typename reflector<Bits>::value_type  x
+    )
+    {
+        value_type        reflection = 0;
+        value_type const  one = 1;
+
+        for ( std::size_t i = 0 ; i < Bits ; ++i, x >>= 1 )
+        {
+            if ( x & one )
+            {
+                reflection |= ( one << (Bits - 1u - i) );
+            }
+        }
+
+        return reflection;
+    }
+
+
+    // Traits class for masks; given the bit number (1-based),
+    // get the mask for that bit and its lower bits.
+    template < std::size_t Bits >
+    struct mask_uint_t
+        : high_uint_t< Bits >
+    {
+        typedef high_uint_t<Bits>          base_type;
+        typedef typename base_type::least  least;
+        typedef typename base_type::fast   fast;
+
+        #ifndef __BORLANDC__
+        using base_type::high_bit;
+        using base_type::high_bit_fast;
+        #else
+        BOOST_STATIC_CONSTANT( least, high_bit = base_type::high_bit );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
+        #endif
+
+#if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 243
+        static const least sig_bits = (~( ~( 0ul ) << Bits )) ;
+#else
+        BOOST_STATIC_CONSTANT( least, sig_bits = (~( ~(least( 0u )) << Bits )) );
+#endif
+#if defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 0 && __GNUC_PATCHLEVEL__ == 2
+        // Work around a weird bug that ICEs the compiler in build_c_cast
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = static_cast<fast>(sig_bits) );
+#else
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+#endif
+    };  // boost::detail::mask_uint_t
+
+    template <  >
+    struct mask_uint_t< std::numeric_limits<unsigned char>::digits >
+        : high_uint_t< std::numeric_limits<unsigned char>::digits >
+    {
+        typedef high_uint_t<std::numeric_limits<unsigned char>::digits>
+          base_type;
+        typedef base_type::least  least;
+        typedef base_type::fast   fast;
+
+        #ifndef __BORLANDC__
+        using base_type::high_bit;
+        using base_type::high_bit_fast;
+        #else
+        BOOST_STATIC_CONSTANT( least, high_bit = base_type::high_bit );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
+        #endif
+
+        BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+
+    };  // boost::detail::mask_uint_t
+
+    #if USHRT_MAX > UCHAR_MAX
+    template <  >
+    struct mask_uint_t< std::numeric_limits<unsigned short>::digits >
+        : high_uint_t< std::numeric_limits<unsigned short>::digits >
+    {
+        typedef high_uint_t<std::numeric_limits<unsigned short>::digits>
+          base_type;
+        typedef base_type::least  least;
+        typedef base_type::fast   fast;
+
+        #ifndef __BORLANDC__
+        using base_type::high_bit;
+        using base_type::high_bit_fast;
+        #else
+        BOOST_STATIC_CONSTANT( least, high_bit = base_type::high_bit );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
+        #endif
+
+        BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+
+    };  // boost::detail::mask_uint_t
+    #endif
+
+    #if UINT_MAX > USHRT_MAX
+    template <  >
+    struct mask_uint_t< std::numeric_limits<unsigned int>::digits >
+        : high_uint_t< std::numeric_limits<unsigned int>::digits >
+    {
+        typedef high_uint_t<std::numeric_limits<unsigned int>::digits>
+          base_type;
+        typedef base_type::least  least;
+        typedef base_type::fast   fast;
+
+        #ifndef __BORLANDC__
+        using base_type::high_bit;
+        using base_type::high_bit_fast;
+        #else
+        BOOST_STATIC_CONSTANT( least, high_bit = base_type::high_bit );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
+        #endif
+
+        BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+
+    };  // boost::detail::mask_uint_t
+    #endif
+
+    #if ULONG_MAX > UINT_MAX
+    template <  >
+    struct mask_uint_t< std::numeric_limits<unsigned long>::digits >
+        : high_uint_t< std::numeric_limits<unsigned long>::digits >
+    {
+        typedef high_uint_t<std::numeric_limits<unsigned long>::digits>
+          base_type;
+        typedef base_type::least  least;
+        typedef base_type::fast   fast;
+
+        #ifndef __BORLANDC__
+        using base_type::high_bit;
+        using base_type::high_bit_fast;
+        #else
+        BOOST_STATIC_CONSTANT( least, high_bit = base_type::high_bit );
+        BOOST_STATIC_CONSTANT( fast, high_bit_fast = base_type::high_bit_fast );
+        #endif
+
+        BOOST_STATIC_CONSTANT( least, sig_bits = (~( least(0u) )) );
+        BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
+
+    };  // boost::detail::mask_uint_t
+    #endif
+
+
+    // CRC table generator
+    template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly, bool Reflect >
+    struct crc_table_t
+    {
+        BOOST_STATIC_CONSTANT( std::size_t, byte_combos = (1ul << CHAR_BIT) );
+
+        typedef mask_uint_t<Bits>            masking_type;
+        typedef typename masking_type::fast  value_type;
+#if defined(__BORLANDC__) && defined(_M_IX86) && (__BORLANDC__ == 0x560)
+        // for some reason Borland's command line compiler (version 0x560)
+        // chokes over this unless we do the calculation for it:
+        typedef value_type                   table_type[ 0x100 ];
+#elif defined(__GNUC__)
+        // old versions of GCC (before 4.0.2) choke on using byte_combos
+        // as a constant expression when compiling with -pedantic.
+        typedef value_type                   table_type[1ul << CHAR_BIT];
+#else
+        typedef value_type                   table_type[ byte_combos ];
+#endif
+
+        static  void  init_table();
+
+        static  table_type  table_;
+
+    };  // boost::detail::crc_table_t
+
+    // CRC table generator static data member definition
+    // (Some compilers [Borland C++] require the initializer to be present.)
+    template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly, bool Reflect >
+    typename crc_table_t<Bits, TruncPoly, Reflect>::table_type
+    crc_table_t<Bits, TruncPoly, Reflect>::table_
+     = { 0 };
+
+    // Populate CRC lookup table
+    template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly, bool Reflect >
+    void
+    crc_table_t<Bits, TruncPoly, Reflect>::init_table
+    (
+    )
+    {
+        // compute table only on the first run
+        static  bool  did_init = false;
+        if ( did_init )  return;
+
+        // factor-out constants to avoid recalculation
+        value_type const     fast_hi_bit = masking_type::high_bit_fast;
+        unsigned char const  byte_hi_bit = 1u << (CHAR_BIT - 1u);
+
+        // loop over every possible dividend value
+        unsigned char  dividend = 0;
+        do
+        {
+            value_type  remainder = 0;
+
+            // go through all the dividend's bits
+            for ( unsigned char mask = byte_hi_bit ; mask ; mask >>= 1 )
+            {
+                // check if divisor fits
+                if ( dividend & mask )
+                {
+                    remainder ^= fast_hi_bit;
+                }
+
+                // do polynominal division
+                if ( remainder & fast_hi_bit )
+                {
+                    remainder <<= 1;
+                    remainder ^= TruncPoly;
+                }
+                else
+                {
+                    remainder <<= 1;
+                }
+            }
+
+            table_[ crc_helper<CHAR_BIT, Reflect>::reflect(dividend) ]
+             = crc_helper<Bits, Reflect>::reflect( remainder );
+        }
+        while ( ++dividend );
+
+        did_init = true;
+    }
+
+    #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    // Align the msb of the remainder to a byte
+    template < std::size_t Bits, bool RightShift >
+    class remainder
+    {
+    public:
+        typedef typename uint_t<Bits>::fast  value_type;
+
+        static unsigned char align_msb( value_type rem )
+            { return rem >> (Bits - CHAR_BIT); }
+    };
+
+    // Specialization for the case that the remainder has less
+    // bits than a byte: align the remainder msb to the byte msb
+    template < std::size_t Bits >
+    class remainder< Bits, false >
+    {
+    public:
+        typedef typename uint_t<Bits>::fast  value_type;
+
+        static unsigned char align_msb( value_type rem )
+            { return rem << (CHAR_BIT - Bits); }
+    };
+    #endif
+
+    // CRC helper routines
+    template < std::size_t Bits, bool DoReflect >
+    class crc_helper
+    {
+    public:
+        // Type
+        typedef typename uint_t<Bits>::fast  value_type;
+
+    #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+        // Possibly reflect a remainder
+        static  value_type  reflect( value_type x )
+            { return detail::reflector<Bits>::reflect( x ); }
+
+        // Compare a byte to the remainder's highest byte
+        static  unsigned char  index( value_type rem, unsigned char x )
+            { return x ^ rem; }
+
+        // Shift out the remainder's highest byte
+        static  value_type  shift( value_type rem )
+            { return rem >> CHAR_BIT; }
+    #else
+        // Possibly reflect a remainder
+        static  value_type  reflect( value_type x )
+            { return DoReflect ? detail::reflector<Bits>::reflect( x ) : x; }
+
+        // Compare a byte to the remainder's highest byte
+        static  unsigned char  index( value_type rem, unsigned char x )
+            { return x ^ ( DoReflect ? rem :
+                                ((Bits>CHAR_BIT)?( rem >> (Bits - CHAR_BIT) ) :
+                                    ( rem << (CHAR_BIT - Bits) ))); }
+
+        // Shift out the remainder's highest byte
+        static  value_type  shift( value_type rem )
+            { return DoReflect ? rem >> CHAR_BIT : rem << CHAR_BIT; }
+    #endif
+
+    };  // boost::detail::crc_helper
+
+    #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    template < std::size_t Bits >
+    class crc_helper<Bits, false>
+    {
+    public:
+        // Type
+        typedef typename uint_t<Bits>::fast  value_type;
+
+        // Possibly reflect a remainder
+        static  value_type  reflect( value_type x )
+            { return x; }
+
+        // Compare a byte to the remainder's highest byte
+        static  unsigned char  index( value_type rem, unsigned char x )
+            { return x ^ remainder<Bits,(Bits>CHAR_BIT)>::align_msb( rem ); }
+
+        // Shift out the remainder's highest byte
+        static  value_type  shift( value_type rem )
+            { return rem << CHAR_BIT; }
+
+    };  // boost::detail::crc_helper
+    #endif
+
+
+}  // namespace detail
+
+
+//  Simple CRC class function definitions  -----------------------------------//
+
+template < std::size_t Bits >
+inline
+crc_basic<Bits>::crc_basic
+(
+    typename crc_basic<Bits>::value_type  truncated_polynominal,
+    typename crc_basic<Bits>::value_type  initial_remainder,      // = 0
+    typename crc_basic<Bits>::value_type  final_xor_value,        // = 0
+    bool                                  reflect_input,          // = false
+    bool                                  reflect_remainder       // = false
+)
+    : rem_( initial_remainder ), poly_( truncated_polynominal )
+    , init_( initial_remainder ), final_( final_xor_value )
+    , rft_in_( reflect_input ), rft_out_( reflect_remainder )
+{
+}
+
+template < std::size_t Bits >
+inline
+typename crc_basic<Bits>::value_type
+crc_basic<Bits>::get_truncated_polynominal
+(
+) const
+{
+    return poly_;
+}
+
+template < std::size_t Bits >
+inline
+typename crc_basic<Bits>::value_type
+crc_basic<Bits>::get_initial_remainder
+(
+) const
+{
+    return init_;
+}
+
+template < std::size_t Bits >
+inline
+typename crc_basic<Bits>::value_type
+crc_basic<Bits>::get_final_xor_value
+(
+) const
+{
+    return final_;
+}
+
+template < std::size_t Bits >
+inline
+bool
+crc_basic<Bits>::get_reflect_input
+(
+) const
+{
+    return rft_in_;
+}
+
+template < std::size_t Bits >
+inline
+bool
+crc_basic<Bits>::get_reflect_remainder
+(
+) const
+{
+    return rft_out_;
+}
+
+template < std::size_t Bits >
+inline
+typename crc_basic<Bits>::value_type
+crc_basic<Bits>::get_interim_remainder
+(
+) const
+{
+    return rem_ & masking_type::sig_bits;
+}
+
+template < std::size_t Bits >
+inline
+void
+crc_basic<Bits>::reset
+(
+    typename crc_basic<Bits>::value_type  new_rem
+)
+{
+    rem_ = new_rem;
+}
+
+template < std::size_t Bits >
+inline
+void
+crc_basic<Bits>::reset
+(
+)
+{
+    this->reset( this->get_initial_remainder() );
+}
+
+template < std::size_t Bits >
+inline
+void
+crc_basic<Bits>::process_bit
+(
+    bool  bit
+)
+{
+    value_type const  high_bit_mask = masking_type::high_bit;
+
+    // compare the new bit with the remainder's highest
+    rem_ ^= ( bit ? high_bit_mask : 0u );
+
+    // a full polynominal division step is done when the highest bit is one
+    bool const  do_poly_div = static_cast<bool>( rem_ & high_bit_mask );
+
+    // shift out the highest bit
+    rem_ <<= 1;
+
+    // carry out the division, if needed
+    if ( do_poly_div )
+    {
+        rem_ ^= poly_;
+    }
+}
+
+template < std::size_t Bits >
+void
+crc_basic<Bits>::process_bits
+(
+    unsigned char  bits,
+    std::size_t    bit_count
+)
+{
+    // ignore the bits above the ones we want
+    bits <<= CHAR_BIT - bit_count;
+
+    // compute the CRC for each bit, starting with the upper ones
+    unsigned char const  high_bit_mask = 1u << ( CHAR_BIT - 1u );
+    for ( std::size_t i = bit_count ; i > 0u ; --i, bits <<= 1u )
+    {
+        process_bit( static_cast<bool>(bits & high_bit_mask) );
+    }
+}
+
+template < std::size_t Bits >
+inline
+void
+crc_basic<Bits>::process_byte
+(
+    unsigned char  byte
+)
+{
+    process_bits( (rft_in_ ? detail::reflector<CHAR_BIT>::reflect(byte)
+     : byte), CHAR_BIT );
+}
+
+template < std::size_t Bits >
+void
+crc_basic<Bits>::process_block
+(
+    void const *  bytes_begin,
+    void const *  bytes_end
+)
+{
+    for ( unsigned char const * p
+     = static_cast<unsigned char const *>(bytes_begin) ; p < bytes_end ; ++p )
+    {
+        process_byte( *p );
+    }
+}
+
+template < std::size_t Bits >
+inline
+void
+crc_basic<Bits>::process_bytes
+(
+    void const *  buffer,
+    std::size_t   byte_count
+)
+{
+    unsigned char const * const  b = static_cast<unsigned char const *>(
+     buffer );
+
+    process_block( b, b + byte_count );
+}
+
+template < std::size_t Bits >
+inline
+typename crc_basic<Bits>::value_type
+crc_basic<Bits>::checksum
+(
+) const
+{
+    return ( (rft_out_ ? detail::reflector<Bits>::reflect( rem_ ) : rem_)
+     ^ final_ ) & masking_type::sig_bits;
+}
+
+
+//  Optimized CRC class function definitions  --------------------------------//
+
+// Macro to compact code
+#define BOOST_CRC_OPTIMAL_NAME  crc_optimal<Bits, TruncPoly, InitRem, \
+ FinalXor, ReflectIn, ReflectRem>
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+BOOST_CRC_OPTIMAL_NAME::crc_optimal
+(
+    typename BOOST_CRC_OPTIMAL_NAME::value_type  init_rem  // = InitRem
+)
+    : rem_( helper_type::reflect(init_rem) )
+{
+    crc_table_type::init_table();
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::get_truncated_polynominal
+(
+) const
+{
+    return TruncPoly;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::get_initial_remainder
+(
+) const
+{
+    return InitRem;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::get_final_xor_value
+(
+) const
+{
+    return FinalXor;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+bool
+BOOST_CRC_OPTIMAL_NAME::get_reflect_input
+(
+) const
+{
+    return ReflectIn;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+bool
+BOOST_CRC_OPTIMAL_NAME::get_reflect_remainder
+(
+) const
+{
+    return ReflectRem;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::get_interim_remainder
+(
+) const
+{
+    // Interim remainder should be _un_-reflected, so we have to undo it.
+    return helper_type::reflect( rem_ ) & masking_type::sig_bits_fast;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+void
+BOOST_CRC_OPTIMAL_NAME::reset
+(
+    typename BOOST_CRC_OPTIMAL_NAME::value_type  new_rem  // = InitRem
+)
+{
+    rem_ = helper_type::reflect( new_rem );
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+void
+BOOST_CRC_OPTIMAL_NAME::process_byte
+(
+    unsigned char  byte
+)
+{
+    process_bytes( &byte, sizeof(byte) );
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+void
+BOOST_CRC_OPTIMAL_NAME::process_block
+(
+    void const *  bytes_begin,
+    void const *  bytes_end
+)
+{
+    // Recompute the CRC for each byte passed
+    for ( unsigned char const * p
+     = static_cast<unsigned char const *>(bytes_begin) ; p < bytes_end ; ++p )
+    {
+        // Compare the new byte with the remainder's higher bits to
+        // get the new bits, shift out the remainder's current higher
+        // bits, and update the remainder with the polynominal division
+        // of the new bits.
+        unsigned char const  byte_index = helper_type::index( rem_, *p );
+        rem_ = helper_type::shift( rem_ );
+        rem_ ^= crc_table_type::table_[ byte_index ];
+    }
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+void
+BOOST_CRC_OPTIMAL_NAME::process_bytes
+(
+    void const *   buffer,
+    std::size_t  byte_count
+)
+{
+    unsigned char const * const  b = static_cast<unsigned char const *>(
+     buffer );
+    process_block( b, b + byte_count );
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::checksum
+(
+) const
+{
+    return ( reflect_out_type::reflect(rem_) ^ get_final_xor_value() )
+     & masking_type::sig_bits_fast;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+void
+BOOST_CRC_OPTIMAL_NAME::operator ()
+(
+    unsigned char  byte
+)
+{
+    process_byte( byte );
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename BOOST_CRC_OPTIMAL_NAME::value_type
+BOOST_CRC_OPTIMAL_NAME::operator ()
+(
+) const
+{
+    return checksum();
+}
+
+
+//  CRC computation function definition  -------------------------------------//
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly,
+           BOOST_CRC_PARM_TYPE InitRem, BOOST_CRC_PARM_TYPE FinalXor,
+           bool ReflectIn, bool ReflectRem >
+inline
+typename uint_t<Bits>::fast
+crc
+(
+    void const *  buffer,
+    std::size_t   byte_count
+    BOOST_CRC_DUMMY_INIT
+)
+{
+    BOOST_CRC_OPTIMAL_NAME  computer;
+    computer.process_bytes( buffer, byte_count );
+    return computer.checksum();
+}
+
+
+//  Augmented-message CRC computation function definitions  ------------------//
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly >
+typename uint_t<Bits>::fast
+augmented_crc
+(
+    void const *                 buffer,
+    std::size_t                  byte_count,
+    typename uint_t<Bits>::fast  initial_remainder
+    BOOST_ACRC_DUMMY_INIT
+)
+{
+    typedef unsigned char                                byte_type;
+    typedef detail::mask_uint_t<Bits>                    masking_type;
+    typedef detail::crc_table_t<Bits, TruncPoly, false>  crc_table_type;
+
+    typename masking_type::fast  rem = initial_remainder;
+    byte_type const * const      b = static_cast<byte_type const *>( buffer );
+    byte_type const * const      e = b + byte_count;
+
+    crc_table_type::init_table();
+    for ( byte_type const * p = b ; p < e ; ++p )
+    {
+        // Use the current top byte as the table index to the next
+        // "partial product."  Shift out that top byte, shifting in
+        // the next augmented-message byte.  Complete the division.
+        byte_type const  byte_index = rem >> ( Bits - CHAR_BIT );
+        rem <<= CHAR_BIT;
+        rem |= *p;
+        rem ^= crc_table_type::table_[ byte_index ];
+    }
+
+    return rem & masking_type::sig_bits_fast;
+}
+
+template < std::size_t Bits, BOOST_CRC_PARM_TYPE TruncPoly >
+inline
+typename uint_t<Bits>::fast
+augmented_crc
+(
+    void const *  buffer,
+    std::size_t   byte_count
+    BOOST_ACRC_DUMMY_INIT
+)
+{
+   // The last function argument has its type specified so the other version of
+   // augmented_crc will be called.  If the cast wasn't in place, and the
+   // BOOST_ACRC_DUMMY_INIT added a third argument (for a workaround), the "0"
+   // would match as that third argument, leading to infinite recursion.
+   return augmented_crc<Bits, TruncPoly>( buffer, byte_count,
+    static_cast<typename uint_t<Bits>::fast>(0) );
+}
+
+
+}  // namespace boost
+
+
+// Undo header-private macros
+#undef BOOST_CRC_OPTIMAL_NAME
+#undef BOOST_ACRC_DUMMY_INIT
+#undef BOOST_ACRC_DUMMY_PARM_TYPE
+#undef BOOST_CRC_DUMMY_INIT
+#undef BOOST_CRC_DUMMY_PARM_TYPE
+#undef BOOST_CRC_PARM_TYPE
+
+
+#endif  // BOOST_CRC_HPP
+