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git.ipfire.org Git - people/ms/u-boot.git/blob - lib/gunzip.c
2 * (C) Copyright 2000-2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <u-boot/zlib.h>
31 #define ZALLOC_ALIGNMENT 16
39 void *zalloc(void *, unsigned, unsigned);
40 void zfree(void *, void *, unsigned);
42 void *zalloc(void *x
, unsigned items
, unsigned size
)
47 size
= (size
+ ZALLOC_ALIGNMENT
- 1) & ~(ZALLOC_ALIGNMENT
- 1);
54 void zfree(void *x
, void *addr
, unsigned nb
)
59 int gunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
)
66 if (src
[2] != DEFLATED
|| (flags
& RESERVED
) != 0) {
67 puts ("Error: Bad gzipped data\n");
70 if ((flags
& EXTRA_FIELD
) != 0)
71 i
= 12 + src
[10] + (src
[11] << 8);
72 if ((flags
& ORIG_NAME
) != 0)
75 if ((flags
& COMMENT
) != 0)
78 if ((flags
& HEAD_CRC
) != 0)
81 puts ("Error: gunzip out of data in header\n");
85 return zunzip(dst
, dstlen
, src
, lenp
, 1, i
);
89 * Uncompress blocks compressed with zlib without headers
91 int zunzip(void *dst
, int dstlen
, unsigned char *src
, unsigned long *lenp
,
92 int stoponerr
, int offset
)
100 r
= inflateInit2(&s
, -MAX_WBITS
);
102 printf ("Error: inflateInit2() returned %d\n", r
);
105 s
.next_in
= src
+ offset
;
106 s
.avail_in
= *lenp
- offset
;
108 s
.avail_out
= dstlen
;
109 r
= inflate(&s
, Z_FINISH
);
110 if ((r
!= Z_STREAM_END
) && (stoponerr
==1)) {
111 printf ("Error: inflate() returned %d\n", r
);
115 *lenp
= s
.next_out
- (unsigned char *) dst
;