Lines Matching +full:xz +full:- +full:utils

2 XZ Embedded
5     XZ Embedded is a relatively small, limited implementation of the .xz
8     XZ Embedded was written for use in the Linux kernel, but the code can
13     of XZ Embedded isn't part of the Linux kernel tree. You should also
14     read linux/Documentation/xz.txt even if you aren't using XZ Embedded
26         cd linux/lib/xz
27         make -C /path/to/kernel/source \
28                 KCPPFLAGS=-I"$(pwd)/../../include" M="$(pwd)" \
34         cd linux/lib/xz
35         make -C /path/to/kernel/source \
36                 KCPPFLAGS=-I"$(pwd)/../../include" M="$(pwd)" \
51     XZ Embedded should compile as either GNU-C89 (used in the Linux
53     non-GNU C89 compiler or a C++ compiler should be quite easy as
54     long as there is a data type for unsigned 64-bit integer (or the
56     care than just using 32-bit integer instead of 64-bit).
58     If you use GCC, try to use a recent version. For example, on x86-32,
59     xz_dec_lzma2.c compiled with GCC 3.3.6 is 15-25 % slower than when
64     To embed the XZ decoder, copy the following files into a single
67         linux/include/linux/xz.h
68         linux/lib/xz/xz_crc32.c
69         linux/lib/xz/xz_dec_lzma2.c
70         linux/lib/xz/xz_dec_stream.c
71         linux/lib/xz/xz_lzma2.h
72         linux/lib/xz/xz_private.h
73         linux/lib/xz/xz_stream.h
76     Alternatively, xz.h may be placed into a different directory but then
80     Your code should use only the functions declared in xz.h. The rest of
81     the .h files are meant only for internal use in XZ Embedded.
87 Supporting concatenated .xz files
89     Regular .xz files can be concatenated as is and the xz command line
91     other popular formats and tools support this too). This kind of .xz
93     threaded XZ compressor, created this kind of .xz files.
96     This is good when XZ data is stored inside some other file format.
97     However, if one is decompressing regular standalone .xz files, one
104     XZ Embedded always supports the integrity check types None and
105     CRC32. Support for CRC64 is optional. SHA-256 is currently not
106     supported in XZ Embedded although the .xz format does support it.
107     The xz tool from XZ Utils uses CRC64 by default, but CRC32 is usually
110     If you want support for CRC64, you need to copy linux/lib/xz/xz_crc64.c
116     See xz.h for details.
128     If the .xz file being decompressed uses an integrity check type that
129     isn't supported by XZ Embedded, it is treated as an error and the
130     file cannot be decompressed. For multi-call mode, this can be modified
134     integrity check won't be verified. In single-call mode there's
136     in single-call mode.
141     linux/lib/xz/xz_dec_bcj.c into your application, and use appropriate
143     #defines in the code that just uses XZ Embedded via xz.h, but having
147         XZ_DEC_X86          x86-32 or x86-64    Little endian only
149         XZ_DEC_IA64         Itanium (IA-64)     Big or little endian
151         XZ_DEC_ARMTHUMB     ARM-Thumb           Little endian only
154     While some architectures are (partially) bi-endian, the endianness
161     ARM or ARM-Thumb. Implementing filters for them can be considered if
162     there is a need for such filters in real-world applications.
166     If you are including XZ Embedded into a shared library, you very
169     or application that also has XZ Embedded in it (which may even be
170     a different version of XZ Embedded). TODO: Provide an easy way
173     Please don't create a shared library of XZ Embedded itself unless
175     everytime you upgrade to a newer version of XZ Embedded. There are
177     XZ Embedded.