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The gzip library can drain all of the input to internal buffers
and still keep providing data even if avail_in is zero. Previously
it was assumed that avail_in != 0 if there is still data expected out,
but this logic breaks near end-of-file for multiple short reads.
Adjust logic to not process end-of-file event too early.
fixes #10809
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musl implements support for malloc.h, but it is only a stub. we do not use
any of the GNU-specific malloc interfaces, so just use POSIX stdlib.h instead.
ref #10794
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In most places where pointer can be an 'error' it cannot be null
pointer. Further, in those cases just calling PTR_ERR() is not enough
to handle the null case. Simplify code by removing this case.
If NULL case needs to be handled, it's better to add separate check
and return fixed error code in that case.
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- apk_istream_splice usage is converted to apk_stream_copy which
is the newer variant. With caching enabled by default, this
makes more sense mmapping or using separate buffers.
- apk_istream_tee is reworked to write to apk_ostream, which simplifies
quite a bit of various things
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The interface was slightly cumbersome, so replace these functions
to return explicit error, and make the return blob a pointer arg.
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Add compression header of adb files. Support uncompressed and
deflate compression at this time.
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It turns out inflate() can output zero bytes, even if it consumed
data. This had the unfortunate side effect of returning zero bytes
(end-of-file) condition before calling the boundary callbacks. This
fixes the logic to not return zero reads on gzip boundary.
In practice this fixes the seldom seen issues of apk reporting
bad signature (when it was correct).
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In case of failure when loading an APKINDEX, no errors are
propagated to the user which may uncorrectly interpret the
current problem.
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