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/*
* TransactionBuffer.cpp
*
* Created on: 17 May 2016
* Author: David
*/
#include "Core.h"
#include "TransactionBuffer.h"
#include <cstring>
void TransactionBuffer::Clear()
{
trType = 0;
ip = 0;
seq = 0;
fragment = 0;
dataLength = 0;
}
bool TransactionBuffer::SetMessage(uint32_t tt, uint32_t p_ip, uint32_t frag)
{
if (IsReady())
{
return false;
}
trType = tt;
ip = p_ip;
seq = 0;
fragment = frag;
dataLength = 0;
return true;
}
// Append data to the message in the output buffer, returning the length appended
size_t TransactionBuffer::AppendData(const void* dataToAppend, uint32_t length)
{
uint32_t spaceLeft = maxSpiDataLength - dataLength;
uint32_t bytesToCopy = min<size_t>(length, spaceLeft);
memcpy((char*)data + dataLength, dataToAppend, bytesToCopy);
dataLength += bytesToCopy;
return bytesToCopy;
}
// Get the address and size to write data into
char *TransactionBuffer::GetBuffer(size_t& length)
{
length = maxSpiDataLength - dataLength;
return reinterpret_cast<char*>(data) + dataLength;
}
// Say we have appended some data
void TransactionBuffer::DataAppended(size_t length)
{
dataLength += length;
}
// End
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