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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
fc9c1727 | 2 | /* |
caf72ff3 | 3 | * Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65 |
fc9c1727 | 4 | * |
caf72ff3 | 5 | * Copyright (C) 2007-2009 Industrie Dial Face S.p.A. |
fc9c1727 LCM |
6 | * Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com) |
7 | * | |
8 | * Copyright (C) 1999-2005 Igor Pavlov | |
fc9c1727 LCM |
9 | */ |
10 | ||
11 | /* | |
12 | * LZMA_Alone stream format: | |
13 | * | |
14 | * uchar Properties[5] | |
15 | * uint64 Uncompressed size | |
16 | * uchar data[*] | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <common.h> | |
fafbb2c3 | 22 | #include <watchdog.h> |
fc9c1727 LCM |
23 | |
24 | #ifdef CONFIG_LZMA | |
25 | ||
26 | #define LZMA_PROPERTIES_OFFSET 0 | |
caf72ff3 | 27 | #define LZMA_SIZE_OFFSET LZMA_PROPS_SIZE |
fc9c1727 LCM |
28 | #define LZMA_DATA_OFFSET LZMA_SIZE_OFFSET+sizeof(uint64_t) |
29 | ||
30 | #include "LzmaTools.h" | |
caf72ff3 | 31 | #include "LzmaDec.h" |
fc9c1727 LCM |
32 | |
33 | #include <linux/string.h> | |
34 | #include <malloc.h> | |
35 | ||
867abdac JH |
36 | static void *SzAlloc(void *p, size_t size) { return malloc(size); } |
37 | static void SzFree(void *p, void *address) { free(address); } | |
caf72ff3 | 38 | |
fc9c1727 | 39 | int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize, |
caf72ff3 | 40 | unsigned char *inStream, SizeT length) |
fc9c1727 | 41 | { |
caf72ff3 LCM |
42 | int res = SZ_ERROR_DATA; |
43 | int i; | |
44 | ISzAlloc g_Alloc; | |
45 | ||
46 | SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */ | |
caf72ff3 LCM |
47 | SizeT outProcessed; |
48 | SizeT outSize; | |
49 | SizeT outSizeHigh; | |
50 | ELzmaStatus state; | |
51 | SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE); | |
52 | ||
dd059842 MV |
53 | debug ("LZMA: Image address............... 0x%p\n", inStream); |
54 | debug ("LZMA: Properties address.......... 0x%p\n", inStream + LZMA_PROPERTIES_OFFSET); | |
55 | debug ("LZMA: Uncompressed size address... 0x%p\n", inStream + LZMA_SIZE_OFFSET); | |
56 | debug ("LZMA: Compressed data address..... 0x%p\n", inStream + LZMA_DATA_OFFSET); | |
57 | debug ("LZMA: Destination address......... 0x%p\n", outStream); | |
caf72ff3 LCM |
58 | |
59 | memset(&state, 0, sizeof(state)); | |
60 | ||
61 | outSize = 0; | |
62 | outSizeHigh = 0; | |
63 | /* Read the uncompressed size */ | |
64 | for (i = 0; i < 8; i++) { | |
65 | unsigned char b = inStream[LZMA_SIZE_OFFSET + i]; | |
66 | if (i < 4) { | |
67 | outSize += (UInt32)(b) << (i * 8); | |
68 | } else { | |
69 | outSizeHigh += (UInt32)(b) << ((i - 4) * 8); | |
70 | } | |
71 | } | |
72 | ||
73 | outSizeFull = (SizeT)outSize; | |
74 | if (sizeof(SizeT) >= 8) { | |
75 | /* | |
76 | * SizeT is a 64 bit uint => We can manage files larger than 4GB! | |
77 | * | |
78 | */ | |
79 | outSizeFull |= (((SizeT)outSizeHigh << 16) << 16); | |
80 | } else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) { | |
81 | /* | |
82 | * SizeT is a 32 bit uint => We cannot manage files larger than | |
f68ab43d MF |
83 | * 4GB! Assume however that all 0xf values is "unknown size" and |
84 | * not actually a file of 2^64 bits. | |
caf72ff3 LCM |
85 | * |
86 | */ | |
f68ab43d MF |
87 | if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) { |
88 | debug ("LZMA: 64bit support not enabled.\n"); | |
89 | return SZ_ERROR_DATA; | |
90 | } | |
caf72ff3 LCM |
91 | } |
92 | ||
f3e6110a MF |
93 | debug("LZMA: Uncompresed size............ 0x%zx\n", outSizeFull); |
94 | debug("LZMA: Compresed size.............. 0x%zx\n", compressedSize); | |
caf72ff3 LCM |
95 | |
96 | g_Alloc.Alloc = SzAlloc; | |
97 | g_Alloc.Free = SzFree; | |
98 | ||
afca2942 KC |
99 | /* Short-circuit early if we know the buffer can't hold the results. */ |
100 | if (outSizeFull != (SizeT)-1 && *uncompressedSize < outSizeFull) | |
101 | return SZ_ERROR_OUTPUT_EOF; | |
102 | ||
caf72ff3 | 103 | /* Decompress */ |
f6eec89f | 104 | outProcessed = min(outSizeFull, *uncompressedSize); |
fafbb2c3 | 105 | |
106 | WATCHDOG_RESET(); | |
107 | ||
caf72ff3 LCM |
108 | res = LzmaDecode( |
109 | outStream, &outProcessed, | |
110 | inStream + LZMA_DATA_OFFSET, &compressedSize, | |
afca2942 | 111 | inStream, LZMA_PROPS_SIZE, LZMA_FINISH_END, &state, &g_Alloc); |
caf72ff3 | 112 | *uncompressedSize = outProcessed; |
4d3b8a0d | 113 | |
f6eec89f | 114 | debug("LZMA: Uncompressed ............... 0x%zx\n", outProcessed); |
4d3b8a0d | 115 | |
caf72ff3 LCM |
116 | if (res != SZ_OK) { |
117 | return res; | |
118 | } | |
119 | ||
120 | return res; | |
fc9c1727 LCM |
121 | } |
122 | ||
123 | #endif |