long , ptr , and off_t are all 64 bits (8 bytes) in size.

Is Long Long always 64-bit?

The type long long is guaranteed to be at least 64 bits (although the guarantee is formally in the form of the range of values it must be able to represent).

Is long in Java 64-bit?

long: The long data type is a 64-bit two’s complement integer. The signed long has a minimum value of -263 and a maximum value of 263-1.