Commit graph

3 commits

Author SHA1 Message Date
Dan Streetman
ca7fc7e962 lib: correct 842 decompress for 32 bit
Avoid 64 bit mod operation, which won't work on 32 bit systems.
Simple subtraction can be used instead in this case.

Reported-By: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-05-13 10:31:59 +08:00
Dan Streetman
f7ead7b47a lib: make lib/842 decompress functions static
Make the do_index and do_op functions static.

They are used only internally by the 842 decompression function,
and should be static.

Reported-By: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-05-13 10:31:55 +08:00
Dan Streetman
2da572c959 lib: add software 842 compression/decompression
Add 842-format software compression and decompression functions.
Update the MAINTAINERS 842 section to include the new files.

The 842 compression function can compress any input data into the 842
compression format.  The 842 decompression function can decompress any
standard-format 842 compressed data - specifically, either a compressed
data buffer created by the 842 software compression function, or a
compressed data buffer created by the 842 hardware compressor (located
in PowerPC coprocessors).

The 842 compressed data format is explained in the header comments.

This is used in a later patch to provide a full software 842 compression
and decompression crypto interface.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-05-11 15:06:43 +08:00