LXR uboot/lib/lzma/LzmaTools.c

   1/*
   2 * Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65
   3 *
   4 * Copyright (C) 2007-2009 Industrie Dial Face S.p.A.
   5 * Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
   6 *
   7 * Copyright (C) 1999-2005 Igor Pavlov
   8 *
   9 * See file CREDITS for list of people who contributed to this
  10 * project.
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License as
  14 * published by the Free Software Foundation; either version 2 of
  15 * the License, or (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25 * MA 02111-1307 USA
  26 */
  27
  28/*
  29 * LZMA_Alone stream format:
  30 *
  31 * uchar   Properties[5]
  32 * uint64  Uncompressed size
  33 * uchar   data[*]
  34 *
  35 */
  36
  37#include <config.h>
  38#include <common.h>
  39#include <watchdog.h>
  40
  41#ifdef CONFIG_LZMA
  42
  43#define LZMA_PROPERTIES_OFFSET 0
  44#define LZMA_SIZE_OFFSET       LZMA_PROPS_SIZE
  45#define LZMA_DATA_OFFSET       LZMA_SIZE_OFFSET+sizeof(uint64_t)
  46
  47#include "LzmaTools.h"
  48#include "LzmaDec.h"
  49
  50#include <linux/string.h>
  51#include <malloc.h>
  52
  53static void *SzAlloc(void *p, size_t size) { p = p; return malloc(size); }
  54static void SzFree(void *p, void *address) { p = p; free(address); }
  55
  56int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize,
  57                  unsigned char *inStream,  SizeT  length)
  58{
  59    int res = SZ_ERROR_DATA;
  60    int i;
  61    ISzAlloc g_Alloc;
  62
  63    SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
  64    SizeT outProcessed;
  65    SizeT outSize;
  66    SizeT outSizeHigh;
  67    ELzmaStatus state;
  68    SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE);
  69
  70    debug ("LZMA: Image address............... 0x%lx\n", inStream);
  71    debug ("LZMA: Properties address.......... 0x%lx\n", inStream + LZMA_PROPERTIES_OFFSET);
  72    debug ("LZMA: Uncompressed size address... 0x%lx\n", inStream + LZMA_SIZE_OFFSET);
  73    debug ("LZMA: Compressed data address..... 0x%lx\n", inStream + LZMA_DATA_OFFSET);
  74    debug ("LZMA: Destination address......... 0x%lx\n", outStream);
  75
  76    memset(&state, 0, sizeof(state));
  77
  78    outSize = 0;
  79    outSizeHigh = 0;
  80    /* Read the uncompressed size */
  81    for (i = 0; i < 8; i++) {
  82        unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
  83            if (i < 4) {
  84                outSize     += (UInt32)(b) << (i * 8);
  85        } else {
  86                outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
  87        }
  88    }
  89
  90    outSizeFull = (SizeT)outSize;
  91    if (sizeof(SizeT) >= 8) {
  92        /*
  93         * SizeT is a 64 bit uint => We can manage files larger than 4GB!
  94         *
  95         */
  96            outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
  97    } else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
  98        /*
  99         * SizeT is a 32 bit uint => We cannot manage files larger than
 100         * 4GB!  Assume however that all 0xf values is "unknown size" and
 101         * not actually a file of 2^64 bits.
 102         *
 103         */
 104        if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) {
 105            debug ("LZMA: 64bit support not enabled.\n");
 106            return SZ_ERROR_DATA;
 107        }
 108    }
 109
 110    debug ("LZMA: Uncompresed size............ 0x%lx\n", outSizeFull);
 111    debug ("LZMA: Compresed size.............. 0x%lx\n", compressedSize);
 112
 113    g_Alloc.Alloc = SzAlloc;
 114    g_Alloc.Free = SzFree;
 115
 116    /* Decompress */
 117    outProcessed = outSizeFull;
 118
 119    WATCHDOG_RESET();
 120
 121    res = LzmaDecode(
 122        outStream, &outProcessed,
 123        inStream + LZMA_DATA_OFFSET, &compressedSize,
 124        inStream, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &state, &g_Alloc);
 125    *uncompressedSize = outProcessed;
 126    if (res != SZ_OK)  {
 127        return res;
 128    }
 129
 130    return res;
 131}
 132
 133#endif
 134