mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 07:13:03 +00:00
26c7fdadcb
Update the LZ4 compression module based on LZ4 v1.8.3 in order to use the newest LZ4_decompress_safe_partial() which can now decode exactly the nb of bytes requested. Signed-off-by: Huang Jianan <jnhuang95@gmail.com>
73 lines
2.8 KiB
C
73 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright 2019 Google LLC
|
|
*/
|
|
|
|
#ifndef __LZ4_H
|
|
#define __LZ4_H
|
|
|
|
/**
|
|
* ulz4fn() - Decompress LZ4 data
|
|
*
|
|
* @src: Source data to decompress
|
|
* @srcn: Length of source data
|
|
* @dst: Destination for uncompressed data
|
|
* @dstn: Returns length of uncompressed data
|
|
* Return: 0 if OK, -EPROTONOSUPPORT if the magic number or version number are
|
|
* not recognised or independent blocks are used, -EINVAL if the reserved
|
|
* fields are non-zero, or input is overrun, -EENOBUFS if the destination
|
|
* buffer is overrun, -EEPROTO if the compressed data causes an error in
|
|
* the decompression algorithm
|
|
*/
|
|
int ulz4fn(const void *src, size_t srcn, void *dst, size_t *dstn);
|
|
|
|
/**
|
|
* LZ4_decompress_safe() - Decompression protected against buffer overflow
|
|
* @source: source address of the compressed data
|
|
* @dest: output buffer address of the uncompressed data
|
|
* which must be already allocated
|
|
* @compressedSize: is the precise full size of the compressed block
|
|
* @maxDecompressedSize: is the size of 'dest' buffer
|
|
*
|
|
* Decompresses data from 'source' into 'dest'.
|
|
* If the source stream is detected malformed, the function will
|
|
* stop decoding and return a negative result.
|
|
* This function is protected against buffer overflow exploits,
|
|
* including malicious data packets. It never writes outside output buffer,
|
|
* nor reads outside input buffer.
|
|
*
|
|
* Return: number of bytes decompressed into destination buffer
|
|
* (necessarily <= maxDecompressedSize)
|
|
* or a negative result in case of error
|
|
*/
|
|
int LZ4_decompress_safe(const char *source, char *dest,
|
|
int compressedSize, int maxDecompressedSize);
|
|
|
|
/**
|
|
* LZ4_decompress_safe_partial() - Decompress a block of size 'compressedSize'
|
|
* at position 'source' into buffer 'dest'
|
|
* @source: source address of the compressed data
|
|
* @dest: output buffer address of the decompressed data which must be
|
|
* already allocated
|
|
* @compressedSize: is the precise full size of the compressed block.
|
|
* @targetOutputSize: the decompression operation will try
|
|
* to stop as soon as 'targetOutputSize' has been reached
|
|
* @maxDecompressedSize: is the size of destination buffer
|
|
*
|
|
* This function decompresses a compressed block of size 'compressedSize'
|
|
* at position 'source' into destination buffer 'dest'
|
|
* of size 'maxDecompressedSize'.
|
|
* The function tries to stop decompressing operation as soon as
|
|
* 'targetOutputSize' has been reached, reducing decompression time.
|
|
* This function never writes outside of output buffer,
|
|
* and never reads outside of input buffer.
|
|
* It is therefore protected against malicious data packets.
|
|
*
|
|
* Return: the number of bytes decoded in the destination buffer
|
|
* (necessarily <= maxDecompressedSize)
|
|
* or a negative result in case of error
|
|
*
|
|
*/
|
|
int LZ4_decompress_safe_partial(const char *src, char *dst,
|
|
int compressedSize, int targetOutputSize, int dstCapacity);
|
|
#endif
|