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4 bytes and reduces running time by one half of one percent.
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based handling of a 6-byte header with with two 24-bit integer reads. Use
xmalloc() and xzalloc().
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shouldn't be a problem if we register signal handlers with sigaction(SA_RESTART)
Straighten out count and len (I generally consistently use "count" for the
current progress and "len" for the total, but this time I got them backwards
for some reason and don't want to confuse myself in future.)
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for limit[] to move a test out of a loop. Unroll a single-bit get_bits()
to avoid a function call in the common case on a hot path. And one more
application of the old "two tests in one via typecasting and/or math" trick.
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but it looks cleaner.
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out how to turn an if/else into a multiply and subtract (saving 2 bytes).
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out the bunzip2 library.
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need 3. Doing varargs for this doesn't really appeal to me (bugs in waiting)
so I made an xcreate() that takes 3 args, and had xopen() call it with 0 for
the third argument. That way, if we feed O_CREAT to xopen() the permission
000 result should be easy to spot.
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can use mercurial branches to keep this sort of thing separate, but at
the moment I'm just going to check in some dangling config entries that
don't control anything yet.
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unrolling a small memmove.
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