Bitsets

[Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>]

Hi folks,

Despite the underwhelming response from this list regarding my
creation of a new bitset abstract data type for GCC, the Bison folks
are keen to use the code so I've cleaned it up and have made it
suitable for possible inclusion in libiberty.

I would like someone to review the code, in particular the interface.
I've tried to make this a consistent and clean design but would
welcome feedback for improvements.

My goal is for this code to replace the sbitmap and bitmap
implementations in GCC so that we can avoid all the hackery in files
such as df.c that have to do battle with two different and
inconsistent bitset interfaces.

Michael.

Attachment: bitset.patch.gz
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