Function CborEncode

source/serialization.cpp:182–228

// ***********************************************************************

void CborEncode(ResizableArray<u8>& output, u8 majorType, u8* pData, i64 dataSize, bool indefinite = false) {
	u8 additionalInfo;
	u8 followingBytes;

	// check if upper 32 bits are set, therefore needs 8 bytes of space
	if (dataSize & ~(0x100000000ull - 1)) {
		additionalInfo = 27;
		followingBytes = 8;
	// upper 16 bits this time (4 bytes)
	} else if (dataSize & ~(0x10000ull - 1)) {
		additionalInfo = 26;
		followingBytes = 4;
	// upper 8 bits (2 bytes)
	} else if (dataSize & ~(0x100ull - 1)) {
		additionalInfo = 25;
		followingBytes = 2;
	// upper 4 bits set (1 byte)
	} else if (dataSize >= 24) {
		additionalInfo = 24;
		followingBytes = 1;
	// remainder 0 - 23
	} else {
		additionalInfo = (u8)dataSize;
		followingBytes = 0;
	}

	if (indefinite) {
		additionalInfo = 31;
		followingBytes = 0;
	}

	i64 requiredSize = (i64)dataSize + followingBytes + 1; // extra 1 for header
	if (!(majorType == 2 || majorType == 3)) {
		requiredSize -= (i64)dataSize;
	}

	// Allocate more space in output if needed
	output.Reserve(output.GrowCapacity(output.count + requiredSize));

	output.pData[output.count] = (u8)majorType << 5 | additionalInfo;
	MemcpyBE(&output.pData[output.count+1], (u8*)&dataSize, followingBytes);
	if (pData != nullptr) {
		MemcpyLE(&output.pData[output.count+1+followingBytes], pData, dataSize);
	}

	output.count += requiredSize;
}

// ***********************************************************************