This is code that I've seen:
memcpy(&byte_array[start], &value, sizeof(value));
It, however, doesn't consider the architecture's byteorder, and will not work correctly on the "other" sex.
This is my version:
for(x = 0; x < sizeof(value); x++, value>>=8) byte_array[start+x] = value & 0xff;It works because it deals only with values, and cares nothing about byte order. Yes, I am looking at the value as a sequence of bits, but I do not care how many bits there are, and regardless of byteorder, the bits are always arranged with msb to the left and lsb to the right.