LzmaUncompress

Syntax

#include <cafe.h>
#include <lzmalib.h>

MY_STDAPI LzmaUncompress(unsigned char *dest, size_t *destLen, const unsigned char *src,
			 SizeT *srcLen, const unsigned char *props, size_t propsSize);

Parameters

dest Output data.

destLen In: output data size.
Out: processed output size.

src Input data.

srcLen In: Input data size.
Out: processed input size.

props

Pointer to a 5-byte buffer containing the LZMA compression properties from LzmaCompress.

Offset	Size	Description
0	1	lc, lb, and pb in encoded form.
1	4	dictSize (in little-endian order).

propsSize Size of properties in props buffer; propsSize = LZMA_PROPS_SIZE = 5.

Return Values

`SZ_OK`	OK.
`SZ_ERROR_DATA`	Data error.
`SZ_ERROR_MEM`	Memory allocation error.
`SZ_UNSUPPORTED`	Unsupported properties.
`SZ_ERROR_INPUT_EOF`	Input src is too short.

Description

Decompress the data referenced by src into the buffer referenced by dest using the LZMA decompression algorithm from the public domain LZMALIB version 9.20 that is available at www.7-zip.org (http://www.7-zip.org/download.html).

Memory Requirements

For decompression, dictSize + state_size is required, where state_size = (4 + (1.5 << (lc + lp))) KB. By default (lc=3, lp=0), state_size = 16 KB.

Demo

There is a demonstration of the usage of compression and decompression in the demo folder:

$CAFE_ROOT/system/src/demo/uselzma

A demonstration involving the parsing and extraction from a 7-Zip file created in Windows is in the demo folder:

$CAFE_ROOT/system/src/demo/szfile

Do Not Call From

None.

Revision History

2014/11/07 Initial version.

CONFIDENTIAL