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/*
* Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65
*
* Copyright (C) 2007-2009 Industrie Dial Face S.p.A.
* Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
*
* Copyright (C) 1999-2005 Igor Pavlov
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* LZMA_Alone stream format:
*
* uchar Properties[5]
* uint64 Uncompressed size
* uchar data[*]
*
*/
#include <config.h>
#include <common.h>
#include <watchdog.h>
#ifdef CONFIG_LZMA
#define LZMA_PROPERTIES_OFFSET 0
#define LZMA_SIZE_OFFSET LZMA_PROPS_SIZE
#define LZMA_DATA_OFFSET LZMA_SIZE_OFFSET+sizeof(uint64_t)
#include "LzmaTools.h"
#include "LzmaDec.h"
#include <linux/string.h>
#include <malloc.h>
static void *SzAlloc(void *p, size_t size) { p = p; return malloc(size); }
static void SzFree(void *p, void *address) { p = p; free(address); }
int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize,
unsigned char *inStream, SizeT length)
{
int res = SZ_ERROR_DATA;
int i;
ISzAlloc g_Alloc;
SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
SizeT outProcessed;
SizeT outSize;
SizeT outSizeHigh;
ELzmaStatus state;
SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE);
debug ("LZMA: Image address............... 0x%p\n", inStream);
debug ("LZMA: Properties address.......... 0x%p\n", inStream + LZMA_PROPERTIES_OFFSET);
debug ("LZMA: Uncompressed size address... 0x%p\n", inStream + LZMA_SIZE_OFFSET);
debug ("LZMA: Compressed data address..... 0x%p\n", inStream + LZMA_DATA_OFFSET);
debug ("LZMA: Destination address......... 0x%p\n", outStream);
memset(&state, 0, sizeof(state));
outSize = 0;
outSizeHigh = 0;
/* Read the uncompressed size */
for (i = 0; i < 8; i++) {
unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
if (i < 4) {
outSize += (UInt32)(b) << (i * 8);
} else {
outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
}
}
outSizeFull = (SizeT)outSize;
if (sizeof(SizeT) >= 8) {
/*
* SizeT is a 64 bit uint => We can manage files larger than 4GB!
*
*/
outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
} else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
/*
* SizeT is a 32 bit uint => We cannot manage files larger than
* 4GB! Assume however that all 0xf values is "unknown size" and
* not actually a file of 2^64 bits.
*
*/
if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) {
debug ("LZMA: 64bit support not enabled.\n");
return SZ_ERROR_DATA;
}
}
debug("LZMA: Uncompresed size............ 0x%zx\n", outSizeFull);
debug("LZMA: Compresed size.............. 0x%zx\n", compressedSize);
g_Alloc.Alloc = SzAlloc;
g_Alloc.Free = SzFree;
/* Short-circuit early if we know the buffer can't hold the results. */
if (outSizeFull != (SizeT)-1 && *uncompressedSize < outSizeFull)
return SZ_ERROR_OUTPUT_EOF;
/* Decompress */
outProcessed = *uncompressedSize;
WATCHDOG_RESET();
res = LzmaDecode(
outStream, &outProcessed,
inStream + LZMA_DATA_OFFSET, &compressedSize,
inStream, LZMA_PROPS_SIZE, LZMA_FINISH_END, &state, &g_Alloc);
*uncompressedSize = outProcessed;
if (res != SZ_OK) {
return res;
}
return res;
}
#endif
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