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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is [Open Source Virtual Machine.].
*
* The Initial Developer of the Original Code is
* Adobe System Incorporated.
* Portions created by the Initial Developer are Copyright (C) 2004-2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Adobe AS3 Team
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef DATAIO_INCLUDED
#define DATAIO_INCLUDED
namespace avmshell
{
template <class T>
inline void CoreSwap(T& a, T& b)
{
T t = a;
a = b;
b = t;
}
inline void FlipU16(uint16_t& value)
{
uint8_t *pa = (uint8_t*)&(value);
CoreSwap(pa[0], pa[1]);
}
inline void FlipU64(uint64_t& value)
{
uint8_t *pa = (uint8_t*)&(value);
CoreSwap(pa[0], pa[7]);
CoreSwap(pa[1], pa[6]);
CoreSwap(pa[2], pa[5]);
CoreSwap(pa[3], pa[4]);
}
inline void FlipU32(uint32_t& value)
{
uint8_t *pa = (uint8_t *)&(value);
CoreSwap(pa[0], pa[3]);
CoreSwap(pa[1], pa[2]);
}
enum ObjectEncoding {
kAMF0 = 0,
kAMF3 = 3,
kEncodeDefault = kAMF3
};
enum Endian
{
kBigEndian = 0,
kLittleEndian = 1
};
class DataIOBase
{
public:
DataIOBase() { m_endian = kBigEndian; }
virtual ~DataIOBase()
{
m_endian = kBigEndian;
}
Endian GetEndian() const { return m_endian; }
void SetEndian(Endian endian) { m_endian = endian; }
void ConvertU16(uint16_t& value)
{
if (GetEndian() != GetNativeEndian())
{
FlipU16(value);
}
}
void ConvertU32(uint32_t& value)
{
if (GetEndian() != GetNativeEndian())
{
FlipU32(value);
}
}
void ConvertU64(uint64_t& value)
{
if (GetEndian() != GetNativeEndian())
{
FlipU64(value);
}
}
Endian GetNativeEndian() const
{
#if defined(AVMPLUS_LITTLE_ENDIAN)
return kLittleEndian;
#elif defined(AVMPLUS_BIG_ENDIAN)
return kBigEndian;
#else
#error
#endif
}
private:
Endian m_endian;
};
typedef unsigned char U8;
class DataInput : virtual public DataIOBase
{
public:
DataInput(Toplevel *toplevel) : m_toplevel(toplevel) {}
virtual uint32_t Available() = 0;
virtual void Read(void *buffer, uint32_t count) = 0;
bool ReadBoolean();
U8 ReadU8();
unsigned short ReadU16();
uint32_t ReadU32();
float ReadFloat();
double ReadDouble();
String* ReadUTF();
String* ReadUTFBytes(uint32_t length);
void ReadByteArray(ByteArray& buffer, uint32_t offset, uint32_t count);
protected:
Toplevel* const m_toplevel;
void ThrowEOFError();
void ThrowMemoryError();
void CheckEOF(uint32_t count);
};
class DataOutput : virtual public DataIOBase
{
public:
DataOutput(Toplevel *toplevel) : m_toplevel(toplevel) { }
virtual void Write(const void *buffer, uint32_t count) = 0;
void WriteBoolean(bool value);
void WriteU8(U8 value);
void WriteU16(unsigned short value);
void WriteU32(uint32_t value);
void WriteFloat(float value);
void WriteDouble(double value);
void WriteUTF(String *str);
void WriteUTFBytes(String *str);
void WriteByteArray(ByteArray& buffer, uint32_t offset, uint32_t count);
protected:
Toplevel* const m_toplevel;
void ThrowRangeError();
};
}
#endif /* DATAIO_INCLUDED */