106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef __GZIP_H
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#define __GZIP_H
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struct blk_desc;
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/**
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* gzip_parse_header() - Parse a header from a gzip file
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*
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* This returns the length of the header.
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*
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* @src: Pointer to gzip file
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* @len: Length of data
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* Return: length of header in bytes, or -1 if not enough data
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*/
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int gzip_parse_header(const unsigned char *src, unsigned long len);
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/**
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* gunzip() - Decompress gzipped data
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*
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* @dst: Destination for uncompressed data
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* @dstlen: Size of destination buffer
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* @src: Source data to decompress
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* @lenp: Returns length of uncompressed data
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* Return: 0 if OK, -1 on error
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*/
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int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp);
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/**
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* zunzip() - Uncompress blocks compressed with zlib without headers
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*
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* @dst: Destination for uncompressed data
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* @dstlen: Size of destination buffer
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* @src: Source data to decompress
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* @lenp: On entry, length data at @src. On exit, number of bytes used from @src
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* @stoponerr: 0 to continue when a decode error is found, 1 to stop
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* @offset: start offset within the src buffer
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* Return: 0 if OK, -1 on error
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*/
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int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp,
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int stoponerr, int offset);
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/**
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* gzwrite progress indicators: defined weak to allow board-specific
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* overrides:
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*
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* gzwrite_progress_init called on startup
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* gzwrite_progress called during decompress/write loop
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* gzwrite_progress_finish called at end of loop to
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* indicate success (retcode=0) or failure
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*/
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void gzwrite_progress_init(ulong expected_size);
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void gzwrite_progress(int iteration, ulong bytes_written, ulong total_bytes);
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void gzwrite_progress_finish(int retcode, ulong totalwritten, ulong totalsize,
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u32 expected_crc, u32 calculated_crc);
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/**
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* gzwrite() - decompress and write gzipped image from memory to block device
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*
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* @src: compressed image address
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* @len: compressed image length in bytes
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* @dev: block device descriptor
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* @szwritebuf: bytes per write (pad to erase size)
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* @startoffs: offset in bytes of first write
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* @szexpected: expected uncompressed length, may be zero to use gzip trailer
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* for files under 4GiB
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* Return: 0 if OK, -1 on error
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*/
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int gzwrite(unsigned char *src, int len, struct blk_desc *dev, ulong szwritebuf,
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ulong startoffs, ulong szexpected);
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/**
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* gzip()- Compress data into a buffer using the gzip algorithm
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*
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* @dst: Destination buffer for compressed data
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* @lenp: On entry, space available in destination buffer (in bytes). On exit,
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* number of bytes used in the buffer
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* @src: Source data to compress
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* @srclen: Size of source data
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* Return: 0 if OK, -1 on error
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*/
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int gzip(void *dst, unsigned long *lenp, unsigned char *src, ulong srclen);
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/**
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* zzip() - Compress blocks with zlib
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*
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* @dst: Destination for compressed data
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* @lenp: On entry, length data at @dst. On exit, number of bytes written to
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* @dst
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* @src: Source data to compress
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* @srclen: Size of source data
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* @stoponerr: 0 to continue when a decode error is found, 1 to stop
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* @func: Some sort of function that is called to do something. !ADD DOCS HERE!
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*/
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int zzip(void *dst, ulong *lenp, unsigned char *src, ulong srclen,
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int stoponerr, int (*func)(ulong, ulong));
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#endif
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