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This patch adds a deep-copy callback to sqfs_object_t and removes the
copying mechanism from sqfs_compressor_t. This is also interesting for
other types.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This allows getting the compressor configuration back after
creating it, for various purposes.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Make every dynamically allocated, opaque data structure inherit from
a common sqfs_object_t structure with common entry points (e.g. destroy).
This removes tons of public API functions and replaces them with a
simple sqfs_destroy instead. If semantics of the (until now implicit)
object system need to be extended, it can be much more conveniantely
done this way.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of returning the ID through a pointer and an error code as
return status, return a single int that could be a compressor ID
(positive values) or an error code (negative values).
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- Add an explicit "you're holding it wrong" error code.
- Consistently return error codes and not have some special places
where -1 is returned.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- Padd the compressor config union
- 128 bytes aught to be enough for everyone, i.e. future compressors.
- Insist that the padding space is initialized to 0. If a field gets
added to an existing compressor, it can test for 0 as a sentinel
value.
- Add a size field to the hook structure, aka "the Microsoft way".
- The explanation is in the comment.
- Don't make the Microsoft mistake of checking for >=, insist on *exact*
size match. Future users will need a fallback if their hooks are
rejected. But at least they will be rejected instead of silently not
being used.
- Add an unsupported flag check to the dir tree reader.
- Add a basic abi unit test that, for now, checks the size of the compressor
config struct fields.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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