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path: root/lib/sqfs/comp/lzma.c
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2020-06-04lzma compressor: add support for the "extreme" flagDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Change the signature of sqfs_compressor_create to return an error codeDavid Oberhollenzer
Make sure the function has a way of telling the caller *why* it failed. This way, the function can convey whether it had an internal error, an allocation failure, whether the arguments are totaly nonsensical, or simply that the compressor *or specific configuration* is not supported. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Add a generic copying mechanism to sqfs_object_tDavid Oberhollenzer
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>
2020-02-27Add a function to the compressor interface to get the configurationDavid Oberhollenzer
This allows getting the compressor configuration back after creating it, for various purposes. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-12Implement a more explicit object systemDavid Oberhollenzer
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>
2019-11-24Cleanup libsquashfs invalid argument error codesDavid Oberhollenzer
- 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>
2019-09-28Fix unwanted sign extension in lzma decompressorDavid Oberhollenzer
First extend the uint8_t to size_t, then do the arithmetic, otherwise there is an addtional implicit conversion to int, possibly resulting in unwanted sign extension. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Remove use of ssize_t from library APIDavid Oberhollenzer
ssize_t is only available on POSIX platforms and even there it is only defined to hold at least -1 in the range of negative numbers. This commit replaces ssize_t return types with sqfs_s32 and the coresponding function arguments with sqfs_u32. Because the range of positiv numbers for a signed 32 bit number is only half that of the unsigned version, additional checks have to be added. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Cleanup: replace fixed with data types with typedefsDavid Oberhollenzer
This is a fully automated search and replace, i.e. I ran this: git grep -l uint8_t | xargs sed -i 's/uint8_t/sqfs_u8/g' git grep -l uint16_t | xargs sed -i 's/uint16_t/sqfs_u16/g' git grep -l uint32_t | xargs sed -i 's/uint32_t/sqfs_u32/g' git grep -l uint64_t | xargs sed -i 's/uint64_t/sqfs_u64/g' git grep -l int8_t | xargs sed -i 's/int8_t/sqfs_s8/g' git grep -l int16_t | xargs sed -i 's/int16_t/sqfs_s16/g' git grep -l int32_t | xargs sed -i 's/int32_t/sqfs_s32/g' git grep -l int64_t | xargs sed -i 's/int64_t/sqfs_s64/g' and than added the appropriate definitions to sqfs/predef.h The whole point being better compatibillity with platforms that may not have an stdint.h with the propper definitions. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Fix typo in error enumeratorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Fix lzma compressor: test if compression actually shrunk the dataDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-09-27Add xz-utils based lzma compressor implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>