fsfw/container/SimpleRingBuffer.cpp

82 lines
2.2 KiB
C++

#include <framework/container/SimpleRingBuffer.h>
#include <cstring>
SimpleRingBuffer::SimpleRingBuffer(const size_t size, bool overwriteOld) :
RingBufferBase<>(0, size, overwriteOld) {
buffer = new uint8_t[size];
}
SimpleRingBuffer::SimpleRingBuffer(uint8_t *buffer, const size_t size,
bool overwriteOld):
RingBufferBase<>(0, size, overwriteOld), buffer(buffer) {}
SimpleRingBuffer::~SimpleRingBuffer() {
delete[] buffer;
}
ReturnValue_t SimpleRingBuffer::writeData(const uint8_t* data,
size_t amount) {
if (availableWriteSpace() >= amount or overwriteOld) {
size_t amountTillWrap = writeTillWrap();
if (amountTillWrap >= amount) {
// remaining size in buffer is sufficient to fit full amount.
memcpy(&buffer[write], data, amount);
}
else {
memcpy(&buffer[write], data, amountTillWrap);
memcpy(buffer, data + amountTillWrap, amount - amountTillWrap);
}
incrementWrite(amount);
return HasReturnvaluesIF::RETURN_OK;
} else {
return HasReturnvaluesIF::RETURN_FAILED;
}
}
ReturnValue_t SimpleRingBuffer::readData(uint8_t* data, size_t amount,
bool incrementReadPtr, bool readRemaining, size_t* trueAmount) {
size_t availableData = availableReadData(READ_PTR);
size_t amountTillWrap = readTillWrap(READ_PTR);
if (availableData < amount) {
if (readRemaining) {
// more data available than amount specified.
amount = availableData;
} else {
return HasReturnvaluesIF::RETURN_FAILED;
}
}
if (trueAmount != nullptr) {
*trueAmount = amount;
}
if (amountTillWrap >= amount) {
memcpy(data, &buffer[read[READ_PTR]], amount);
} else {
memcpy(data, &buffer[read[READ_PTR]], amountTillWrap);
memcpy(data + amountTillWrap, buffer, amount - amountTillWrap);
}
if(incrementReadPtr) {
deleteData(amount, readRemaining);
}
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t SimpleRingBuffer::deleteData(size_t amount,
bool deleteRemaining, size_t* trueAmount) {
size_t availableData = availableReadData(READ_PTR);
if (availableData < amount) {
if (deleteRemaining) {
amount = availableData;
} else {
return HasReturnvaluesIF::RETURN_FAILED;
}
}
if (trueAmount != nullptr) {
*trueAmount = amount;
}
incrementRead(amount, READ_PTR);
return HasReturnvaluesIF::RETURN_OK;
}