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 53 static void *SzAlloc(void *p, size_t size) { p = p; return malloc(size); } 54 static void SzFree(void *p, void *address) { p = p; free(address); } 55 56 int 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