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byteBuffer: wrapped buffer support

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This commit is contained in:
Matej Sekoranja
2014-04-09 15:18:40 +02:00
parent f7957c8ea5
commit 76a54d38e4
1 changed files with 23 additions and 4 deletions
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27
pvDataApp/misc/byteBuffer.h
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@@ -202,22 +202,40 @@ public:
*
* @param size The number of bytes.
* @param byteOrder The byte order.
* Must be one of EPICS_BYTE_ORDER,EPICS_ENDIAN_LITTLE,EPICS_ENDIAN_BIG,
* Must be one of EPICS_BYTE_ORDER,EPICS_ENDIAN_LITTLE,EPICS_ENDIAN_BIG.
*/
ByteBuffer(std::size_t size, int byteOrder = EPICS_BYTE_ORDER) :
_buffer(0), _size(size),
_reverseEndianess(byteOrder != EPICS_BYTE_ORDER),
_reverseFloatEndianess(byteOrder != EPICS_FLOAT_WORD_ORDER)
_reverseFloatEndianess(byteOrder != EPICS_FLOAT_WORD_ORDER),
_wrapped(false)
{
_buffer = (char*)malloc(size);
clear();
}
/**
* Constructor for wrapping existing buffers.
* Given buffer will not be released by the ByteBuffer instance.
* @param buffer Existing buffer.
* @param size The number of bytes.
* @param byteOrder The byte order.
* Must be one of EPICS_BYTE_ORDER,EPICS_ENDIAN_LITTLE,EPICS_ENDIAN_BIG.
*/
ByteBuffer(char* buffer, std::size_t size, int byteOrder = EPICS_BYTE_ORDER) :
_buffer(buffer), _size(size),
_reverseEndianess(byteOrder != EPICS_BYTE_ORDER),
_reverseFloatEndianess(byteOrder != EPICS_FLOAT_WORD_ORDER),
_wrapped(true)
{
clear();
}
/**
* Destructor
*/
~ByteBuffer()
{
if (_buffer) free(_buffer);
if (_buffer && !_wrapped) free(_buffer);
}
/**
* Set the byte order.
@@ -618,7 +636,8 @@ private:
char* _limit;
std::size_t _size;
bool _reverseEndianess;
bool _reverseFloatEndianess;
bool _reverseFloatEndianess;
bool _wrapped;
};
template<>