parse hex string to bytes. values can be separated by spaces

gistfile1.cpp

void parseData(const char* dataStr, unsigned char* data, int* length) {
	::memset(data, 0, sizeof(data));
	const char* ds = dataStr;
	unsigned char* d = data;
	char byteStr[3] = { 0 };
	while (true) {
		if (ds[0] == ' ') {
			++ds;
		}
		if (ds[0] == 0 || ds[1] == 0) {
			break;
		}
		byteStr[0] = ds[0];
		byteStr[1] = ds[1];
		char* endPtr = 0;
		int num = strtoul(byteStr, &endPtr, 16);
		printf("%c %c => %i\n", ds[0], ds[1], num);
		*d = num;
		++(*length);
		ds += 2;
		++d;
	}
}