2^-14 fails to serialize on little-endian systems about libcbor

[dgrigsby]

The problem appears to be in cbor_encode_half.
"exp" is -14 (which is correct), represented in a byte as 0xf2.
Then this is interpreted as passing the if (exp > 15) test at line 147.
A zero is returned, which causes cbor_serialize_alloc to uselessly resize the buffer and try again.
The screenshot below shows the sordid details.

[dgrigsby]

This may mean you can't encode any half-float between 0 and 0.5.

[PJK]

Hi @dgrigsby,

I'm not sure this problem has to do with endianess -- I've added all the examples to the test suite (075cdbf) and they seem to pass on x86 machines.

Could you please describe the complete setup/XCode config?

Thank you!

[PJK]

You were right, there was a problem in how the encoding works. Until there is a native way to represent half floats in C, it will remain a compromise, but I've updated the encoding so that it always produces a reasonable value.

#49 together with #50 should resolve your issue.