Bit syntax endianness confusion
Tue Dec 5 18:50:34 CET 2000
Tony Rogvall wrote:
>Expression like yours above does not make much
>sense (Field1:4/little) since only byte sequences
>are affected by the endian order.
Yes, I suspected as much. Since I'm dealing with a file of N fields of
fixed size (specifically 64 bits), it is easy to do a swizzle up front with
preprocess(B) -> preprocess(B, ).
preprocess(<<B:8/binary, Rest/binary>>, Acc) ->
preprocess(<<>>, Acc) ->
Using binary patterns directly in byteswap is faster for the case when the
input binary is 4 bytes, but I didn't test the 8 byte case. Either version
is plenty fast for the disassembler I'm working on.
It would be nice to be able to specify an overall endianess for a pattern,
maybe like this:
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