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5a4f10d71b
The gzip API uses the u64 type in it, which is not available in the host build. This makes it impossible to include the header file. We could make this type available, but it seems unnecessary. Limiting the compression size to that of the 'unsigned long' type seems good enough. On 32-bit machines the limit then becomes 4GB, which likely exceeds available RAM anyway, therefore it should be sufficient. On 64-bit machines this is effectively u64 anyway. Update the header file and implementation to use 'ulong' instead of 'u64'. Add a definition of u32 for the cases that seem to need exactly that length. This should be safe enough. Signed-off-by: Simon Glass <sjg@chromium.org>
105 lines
3.3 KiB
C
105 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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