bool
Block::fromBuffer(const uint8_t* buffer, size_t maxSize, Block& block)
{
const uint8_t* tempBegin = buffer;
const uint8_t* tempEnd = buffer + maxSize;
uint32_t type = 0;
bool isOk = Tlv::readType(tempBegin, tempEnd, type);
if (!isOk)
return false;
uint64_t length;
isOk = Tlv::readVarNumber(tempBegin, tempEnd, length);
if (!isOk)
return false;
if (length > static_cast<uint64_t>(tempEnd - tempBegin))
{
return false;
}
BufferPtr sharedBuffer = make_shared<Buffer>(buffer, tempBegin + length);
block = Block(sharedBuffer, type,
sharedBuffer->begin(), sharedBuffer->end(),
sharedBuffer->begin() + (tempBegin - buffer), sharedBuffer->end());
return true;
}
std::tuple<bool, Block>
Block::fromBuffer(const uint8_t* buffer, size_t maxSize)
{
const uint8_t* tempBegin = buffer;
const uint8_t* tempEnd = buffer + maxSize;
uint32_t type = 0;
bool isOk = tlv::readType(tempBegin, tempEnd, type);
if (!isOk)
return std::make_tuple(false, Block());
uint64_t length;
isOk = tlv::readVarNumber(tempBegin, tempEnd, length);
if (!isOk)
return std::make_tuple(false, Block());
if (length > static_cast<uint64_t>(tempEnd - tempBegin))
return std::make_tuple(false, Block());
BufferPtr sharedBuffer = make_shared<Buffer>(buffer, tempBegin + length);
return std::make_tuple(true,
Block(sharedBuffer, type,
sharedBuffer->begin(), sharedBuffer->end(),
sharedBuffer->begin() + (tempBegin - buffer), sharedBuffer->end()));
}