Endianness puzzle

Hal Murray hmurray at megapathdsl.net
Tue Dec 13 01:16:33 UTC 2016

Disclaimer: I could easily get something backwards.  I've worked with both 
and can easily switch even when I shouldn't.

> +#define LAST32MASK	0x00000000ffffffffUL
> +#define FIRST32MASK	0xffffffff00000000UL

FIRST and LAST seem like poor choices for words.  Do you mean first on the 
wire?  Network protocols are almost always little endian.

In any case, those masks are not within an ifdef so they will be used in both 

If you want the low or high bits, the masks and macros don't depend on the 
endianness if you are extracting from a uint64_t.  You may need to invent a 
new host2net type macro to byte swap an 8 byte chunk if you want to 
send/receive those chunks from the network.

These are my opinions.  I hate spam.

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