How to check if a value has no more than 15 bits?
assert (val <= 0x7fff); // or: assert (val < 0x8000);
Nooo! How disgusting! Let's try better:
assert (val < (1<<15));
Binary logarithm of 1<<15 is 15.
This is a real piece of code I'm working right now on.
assert (vals[0] < (1<<15));
assert (vals[1] < (1<<10));
assert (vals[2] < (1<<10));
assert (vals[3] < (1<<8));
assert (vals[4] < (1<<9));
vals[0] must be under 15 bits, vals[1] and 2 -- under 10 bits, etc. This is way better for self-documenting purposes than 0x7fff, 0x8000, 0x3fff, 0x4000, etc.
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