xref: /openbmc/u-boot/lib/lzma/LzmaTools.c (revision 6b7c0f5e)
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