#1 Portability issue

[JL]

AFAIK, only GNU compilers can handle this code. The reason is the non-standard GNUism known as "case ranges".

Replacing those 'switch' with 'if-else' statements will make the code more portable.

[Remi Chateauneu]

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This is right. The reason for that is the efficiency and concision of the code generated by gcc, but if-then-else is probably fast enough.