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Add uint24 and network byte order conversions

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This commit is contained in:
Vinnie Falco
2013-08-10 19:40:57 -07:00
parent b4d0de9c61
commit 75b3b6bbfe
6 changed files with 282 additions and 1 deletions
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2
Subtrees/beast/Builds/VisualStudio2012/beast.vcxproj
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@@ -170,12 +170,14 @@
<ClInclude Include="..\..\modules\beast_core\maths\beast_MurmurHash.h" />
<ClInclude Include="..\..\modules\beast_core\maths\beast_Random.h" />
<ClInclude Include="..\..\modules\beast_core\maths\beast_Range.h" />
<ClInclude Include="..\..\modules\beast_core\maths\beast_uint24.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_Atomic.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_AtomicCounter.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_AtomicFlag.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_AtomicPointer.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_AtomicState.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_ByteOrder.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_ByteSwap.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_CacheLine.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_HeapBlock.h" />
<ClInclude Include="..\..\modules\beast_core\memory\beast_Memory.h" />

6
Subtrees/beast/Builds/VisualStudio2012/beast.vcxproj.filters
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@@ -836,6 +836,12 @@
<ClInclude Include="..\..\modules\beast_asio\basics\beast_PeerRole.h">
<Filter>beast_asio\basics</Filter>
</ClInclude>
<ClInclude Include="..\..\modules\beast_core\maths\beast_uint24.h">
<Filter>beast_core\maths</Filter>
</ClInclude>
<ClInclude Include="..\..\modules\beast_core\memory\beast_ByteSwap.h">
<Filter>beast_core\memory</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\modules\beast_core\beast_core.cpp">

2
Subtrees/beast/modules/beast_core/beast_core.h
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@@ -230,6 +230,8 @@ namespace beast
#include "time/beast_PerformedAtExit.h"
#include "diagnostic/beast_LeakChecked.h"
#include "memory/beast_ByteOrder.h"
#include "memory/beast_ByteSwap.h"
#include "maths/beast_uint24.h"
#include "logging/beast_Logger.h"
#include "threads/beast_Thread.h"
#include "diagnostic/beast_FPUFlags.h"

144
Subtrees/beast/modules/beast_core/maths/beast_uint24.h Normal file
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@@ -0,0 +1,144 @@
//------------------------------------------------------------------------------
/*
This file is part of Beast: https://github.com/vinniefalco/Beast
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#ifndef BEAST_UINT24_H_INCLUDED
#define BEAST_UINT24_H_INCLUDED
/** A 24 bit unsigned integer.
We try to be as compatible as possible with built in types.
*/
class uint24 : public SafeBool <uint24>
{
public:
enum { mask = 0xffffff };
inline uint24 () noexcept { /* uninitialized */ }
inline uint24 (uint24 const& other) noexcept : m_value (other.m_value) { }
inline uint24& operator= (uint24 const& other) noexcept { m_value = other.m_value; return *this; }
template <typename IntegralType> inline uint24 (IntegralType value) noexcept : m_value (value & mask) { }
template <typename IntegralType> inline uint24& operator= (IntegralType value) noexcept { m_value = value & mask; return *this; }
inline uint32 get () const noexcept { return m_value; }
inline bool asBoolean () const noexcept { return m_value != 0; }
inline operator String () const { return String (m_value); }
inline uint24& operator++ () noexcept { (++m_value) &= mask; return *this; }
inline uint24& operator-- () noexcept { (--m_value) &= mask; return *this; }
inline uint24 operator++ (int) noexcept { return uint24 (m_value + 1); }
inline uint24 operator-- (int) noexcept { return uint24 (m_value - 1); }
inline uint24& operator~ () { m_value = (~ m_value) & mask; return *this; }
inline uint24& operator+= (uint24 const& rhs) { m_value = (m_value + rhs.m_value) & mask; return *this; }
inline uint24& operator-= (uint24 const& rhs) { m_value = (m_value - rhs.m_value) & mask; return *this; }
inline uint24& operator*= (uint24 const& rhs) { m_value = (m_value * rhs.m_value) & mask; return *this; }
inline uint24& operator/= (uint24 const& rhs) { m_value = (m_value / rhs.m_value) & mask; return *this; }
inline uint24& operator|= (uint24 const& rhs) { m_value = (m_value | rhs.m_value) & mask; return *this; }
inline uint24& operator&= (uint24 const& rhs) { m_value = (m_value & rhs.m_value) & mask; return *this; }
inline uint24& operator^= (uint24 const& rhs) { m_value = (m_value ^ rhs.m_value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator+= (IntegralType value) { m_value = (m_value + value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator-= (IntegralType value) { m_value = (m_value - value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator*= (IntegralType value) { m_value = (m_value * value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator/= (IntegralType value) { m_value = (m_value / value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator|= (IntegralType value) { m_value = (m_value | value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator&= (IntegralType value) { m_value = (m_value & value) & mask; return *this; }
template <typename IntegralType> inline uint24& operator^= (IntegralType value) { m_value = (m_value ^ value) & mask; return *this; }
template <typename IntegralType> inline bool operator== (IntegralType value) const noexcept { return m_value == value; }
template <typename IntegralType> inline bool operator!= (IntegralType value) const noexcept { return m_value != value; }
template <typename IntegralType> inline bool operator< (IntegralType value) const noexcept { return m_value < value; }
template <typename IntegralType> inline bool operator> (IntegralType value) const noexcept { return m_value > value; }
template <typename IntegralType> inline bool operator<= (IntegralType value) const noexcept { return m_value <= value; }
template <typename IntegralType> inline bool operator>= (IntegralType value) const noexcept { return m_value >= value; }
// Construct from raw bytes
static uint24 from3RawBytes (void const* buf)
{
uint24 result;
uint8* const raw (reinterpret_cast <uint8*> (&result.m_value));
uint8 const* const data (reinterpret_cast <uint8 const*> (buf));
#if BEAST_LITTLE_ENDIAN
raw [0] = data [0];
raw [1] = data [1];
raw [2] = data [2];
raw [3] = 0;
#else
raw [0] = 0;
raw [1] = data [0];
raw [2] = data [1];
raw [3] = data [2];
#endif
return result;
}
private:
uint24* operator&();
uint24 const* operator&() const;
friend struct detail::SwapBytes <uint24>;
inline uint8& operator[] (int index) noexcept { bassert (index >= 0 && index < 3); return raw () [index]; }
inline uint8 operator[] (int index) const noexcept { bassert (index >= 0 && index < 3); return raw () [index]; }
#if BEAST_LITTLE_ENDIAN
inline uint8* raw () noexcept { return reinterpret_cast <uint8*> (&m_value); }
inline uint8 const* raw () const noexcept { return reinterpret_cast <uint8 const*> (&m_value); }
#else
inline uint8* raw () noexcept { return reinterpret_cast <uint8*> (&m_value) + 1; }
inline uint8 const* raw () const noexcept { return reinterpret_cast <uint8 const*> (&m_value) + 1; }
#endif
uint32 m_value;
};
inline uint24 const operator~ (uint24 const& value) noexcept { return uint24 (~value.get ()); }
inline uint24 const operator+ (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () + rhs.get ()); }
inline uint24 const operator- (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () - rhs.get ()); }
inline uint24 const operator/ (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () / rhs.get ()); }
inline uint24 const operator* (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () * rhs.get ()); }
inline uint24 const operator| (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () ^ rhs.get ()); }
inline uint24 const operator& (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () & rhs.get ()); }
inline uint24 const operator^ (uint24 const& lhs, uint24 const& rhs) noexcept { return uint24 (lhs.get () ^ rhs.get ()); }
inline bool operator== (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () == rhs.get (); }
inline bool operator!= (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () != rhs.get (); }
inline bool operator< (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () < rhs.get (); }
inline bool operator> (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () > rhs.get (); }
inline bool operator<= (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () <= rhs.get (); }
inline bool operator>= (uint24 const& lhs, uint24 const& rhs) noexcept { return lhs.get () >= rhs.get (); }
/** SwapBytes specialization uint24. */
namespace detail
{
template <>
struct SwapBytes <uint24>
{
inline uint24 const operator() (uint24 const& value) const noexcept
{
#if BEAST_LITTLE_ENDIAN
uint24 result;
result [0] = value [2];
result [1] = value [1];
result [2] = value [0];
result [3] = 0;
return result;
#else
return value;
#endif
}
};
}
#endif

3
Subtrees/beast/modules/beast_core/memory/beast_ByteOrder.h
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@@ -182,4 +182,5 @@ inline int ByteOrder::bigEndian24Bit (const char* const bytes)
inline void ByteOrder::littleEndian24BitToChars (const int value, char* const destBytes) { destBytes[0] = (char)(value & 0xff); destBytes[1] = (char)((value >> 8) & 0xff); destBytes[2] = (char)((value >> 16) & 0xff); }
inline void ByteOrder::bigEndian24BitToChars (const int value, char* const destBytes) { destBytes[0] = (char)((value >> 16) & 0xff); destBytes[1] = (char)((value >> 8) & 0xff); destBytes[2] = (char)(value & 0xff); }
#endif // BEAST_BYTEORDER_BEASTHEADER
#endif

126
Subtrees/beast/modules/beast_core/memory/beast_ByteSwap.h Normal file
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@@ -0,0 +1,126 @@
//------------------------------------------------------------------------------
/*
This file is part of Beast: https://github.com/vinniefalco/Beast
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#ifndef BEAST_BYTESWAP_H_INCLUDED
#define BEAST_BYTESWAP_H_INCLUDED
namespace detail
{
/** Specialized helper class template for swapping bytes.
Normally you won't use this directly, use the helper function
byteSwap instead. You can specialize this class for your
own user defined types, as was done for uint24.
@see swapBytes, uint24
*/
template <typename IntegralType>
struct SwapBytes
{
inline IntegralType operator() (IntegralType value) const noexcept
{
return ByteOrder::swap (value);
}
};
// Specializations for signed integers
template <>
struct SwapBytes <int16>
{
inline int16 operator() (int16 value) const noexcept
{
return static_cast <int16> (ByteOrder::swap (static_cast <uint16> (value)));
}
};
template <>
struct SwapBytes <int32>
{
inline int32 operator() (int32 value) const noexcept
{
return static_cast <int32> (ByteOrder::swap (static_cast <uint32> (value)));
}
};
template <>
struct SwapBytes <int64>
{
inline int64 operator() (int64 value) const noexcept
{
return static_cast <int64> (ByteOrder::swap (static_cast <uint64> (value)));
}
};
}
//------------------------------------------------------------------------------
/** Returns a type with the bytes swapped.
Little endian becomes big endian and vice versa. The underlying
type must be an integral type or behave like one.
*/
template <class IntegralType>
inline IntegralType swapBytes (IntegralType value) noexcept
{
return detail::SwapBytes <IntegralType> () (value);
}
/** Returns the machine byte-order value to little-endian byte order. */
template <typename IntegralType>
inline IntegralType toLittleEndian (IntegralType value) noexcept
{
#if BEAST_LITTLE_ENDIAN
return value;
#else
return swapBytes (value);
#endif
}
/** Returns the machine byte-order value to big-endian byte order. */
template <typename IntegralType>
inline IntegralType toBigEndian (IntegralType value) noexcept
{
#if BEAST_LITTLE_ENDIAN
return swapBytes (value);
#else
return value;
#endif
}
/** Returns the machine byte-order value to network byte order. */
template <typename IntegralType>
inline IntegralType toNetworkByteOrder (IntegralType value) noexcept
{
return toBigEndian (value);
}
/** Converts from network byte order to machine byte order. */
template <typename IntegralType>
inline IntegralType fromNetworkByteOrder (IntegralType value) noexcept
{
#if BEAST_LITTLE_ENDIAN
return swapBytes (value);
#else
return value;
#endif
}
#endif