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git.ipfire.org Git - thirdparty/u-boot.git/blob - fs/cramfs/uncompress.c
4 * Copyright (C) 1999 Linus Torvalds
5 * Copyright (C) 2000-2002 Transmeta Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
11 * cramfs interfaces to the uncompression library. There's really just
14 * - cramfs_uncompress_init() - called to initialize the thing.
15 * - cramfs_uncompress_exit() - tell me when you're done
16 * - cramfs_uncompress_block() - uncompress a block.
18 * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We
19 * only have one stream, and we'll initialize it only once even if it
20 * then is used by multiple filesystems.
26 #include <u-boot/zlib.h>
28 static z_stream stream
;
30 /* Returns length of decompressed data. */
31 int cramfs_uncompress_block (void *dst
, void *src
, int srclen
)
35 inflateReset (&stream
);
38 stream
.avail_in
= srclen
;
40 stream
.next_out
= dst
;
41 stream
.avail_out
= 4096 * 2;
43 err
= inflate (&stream
, Z_FINISH
);
45 if (err
!= Z_STREAM_END
)
47 return stream
.total_out
;
50 /*printf ("Error %d while decompressing!\n", err); */
51 /*printf ("%p(%d)->%p\n", src, srclen, dst); */
55 int cramfs_uncompress_init (void)
59 stream
.zalloc
= gzalloc
;
60 stream
.zfree
= gzfree
;
64 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
65 stream
.outcb
= (cb_func
) WATCHDOG_RESET
;
67 stream
.outcb
= Z_NULL
;
68 #endif /* CONFIG_HW_WATCHDOG */
70 err
= inflateInit (&stream
);
72 printf ("Error: inflateInit2() returned %d\n", err
);
79 int cramfs_uncompress_exit (void)