Question

I am porting some Java code to Objective C and know enough bitwise to get a headache. Can someone point me to the objC equivalents to Double.doubleToLongBits and Float.floatToIntBits?

Answer 1

There’s no safe way to assign the bits of a double to a long in Objective C.
In Java, long and double are both 64bits. In some cases for Objective C, long is 32bit and double is 64bit.

You should use long long instead.

int intValue = *((int*)(&floatValue));
long long llValue = *((long long*)(&doubleValue));