mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
9c55c54fb4
This allows the caller to easily detect how much of the destination buffer has been used. Signed-off-by: Simon Glass <sjg@chromium.org>
105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
/*
|
|
* (C) Copyright 2000-2006
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <command.h>
|
|
#include <image.h>
|
|
#include <malloc.h>
|
|
#include <u-boot/zlib.h>
|
|
|
|
#define ZALLOC_ALIGNMENT 16
|
|
#define HEAD_CRC 2
|
|
#define EXTRA_FIELD 4
|
|
#define ORIG_NAME 8
|
|
#define COMMENT 0x10
|
|
#define RESERVED 0xe0
|
|
#define DEFLATED 8
|
|
|
|
void *gzalloc(void *x, unsigned items, unsigned size)
|
|
{
|
|
void *p;
|
|
|
|
size *= items;
|
|
size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
|
|
|
|
p = malloc (size);
|
|
|
|
return (p);
|
|
}
|
|
|
|
void gzfree(void *x, void *addr, unsigned nb)
|
|
{
|
|
free (addr);
|
|
}
|
|
|
|
int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
|
|
{
|
|
int i, flags;
|
|
|
|
/* skip header */
|
|
i = 10;
|
|
flags = src[3];
|
|
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
|
|
puts ("Error: Bad gzipped data\n");
|
|
return (-1);
|
|
}
|
|
if ((flags & EXTRA_FIELD) != 0)
|
|
i = 12 + src[10] + (src[11] << 8);
|
|
if ((flags & ORIG_NAME) != 0)
|
|
while (src[i++] != 0)
|
|
;
|
|
if ((flags & COMMENT) != 0)
|
|
while (src[i++] != 0)
|
|
;
|
|
if ((flags & HEAD_CRC) != 0)
|
|
i += 2;
|
|
if (i >= *lenp) {
|
|
puts ("Error: gunzip out of data in header\n");
|
|
return (-1);
|
|
}
|
|
|
|
return zunzip(dst, dstlen, src, lenp, 1, i);
|
|
}
|
|
|
|
/*
|
|
* Uncompress blocks compressed with zlib without headers
|
|
*/
|
|
int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp,
|
|
int stoponerr, int offset)
|
|
{
|
|
z_stream s;
|
|
int err = 0;
|
|
int r;
|
|
|
|
s.zalloc = gzalloc;
|
|
s.zfree = gzfree;
|
|
|
|
r = inflateInit2(&s, -MAX_WBITS);
|
|
if (r != Z_OK) {
|
|
printf ("Error: inflateInit2() returned %d\n", r);
|
|
return -1;
|
|
}
|
|
s.next_in = src + offset;
|
|
s.avail_in = *lenp - offset;
|
|
s.next_out = dst;
|
|
s.avail_out = dstlen;
|
|
do {
|
|
r = inflate(&s, Z_FINISH);
|
|
if (stoponerr == 1 && r != Z_STREAM_END &&
|
|
(s.avail_out == 0 || r != Z_BUF_ERROR)) {
|
|
printf("Error: inflate() returned %d\n", r);
|
|
err = -1;
|
|
break;
|
|
}
|
|
s.avail_in = *lenp - offset - (int)(s.next_out - (unsigned char*)dst);
|
|
} while (r == Z_BUF_ERROR);
|
|
*lenp = s.next_out - (unsigned char *) dst;
|
|
inflateEnd(&s);
|
|
|
|
return err;
|
|
}
|