repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* Xz.h - Xz interface
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| 2 | 2010-09-17 : Igor Pavlov : Public domain */
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| 3 |
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| 4 | #ifndef __XZ_H
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| 5 | #define __XZ_H
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| 6 |
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| 7 | #include "Sha256.h"
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| 8 |
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| 9 | EXTERN_C_BEGIN
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| 10 |
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| 11 | #define XZ_ID_Subblock 1
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| 12 | #define XZ_ID_Delta 3
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| 13 | #define XZ_ID_X86 4
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| 14 | #define XZ_ID_PPC 5
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| 15 | #define XZ_ID_IA64 6
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| 16 | #define XZ_ID_ARM 7
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| 17 | #define XZ_ID_ARMT 8
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| 18 | #define XZ_ID_SPARC 9
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| 19 | #define XZ_ID_LZMA2 0x21
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| 20 |
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| 21 | unsigned Xz_ReadVarInt(const Byte *p, size_t maxSize, UInt64 *value);
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| 22 | unsigned Xz_WriteVarInt(Byte *buf, UInt64 v);
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| 23 |
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| 24 | /* ---------- xz block ---------- */
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| 25 |
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| 26 | #define XZ_BLOCK_HEADER_SIZE_MAX 1024
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| 27 |
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| 28 | #define XZ_NUM_FILTERS_MAX 4
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| 29 | #define XZ_BF_NUM_FILTERS_MASK 3
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| 30 | #define XZ_BF_PACK_SIZE (1 << 6)
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| 31 | #define XZ_BF_UNPACK_SIZE (1 << 7)
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| 32 |
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| 33 | #define XZ_FILTER_PROPS_SIZE_MAX 20
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| 34 |
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| 35 | typedef struct
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| 36 | {
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| 37 | UInt64 id;
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| 38 | UInt32 propsSize;
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| 39 | Byte props[XZ_FILTER_PROPS_SIZE_MAX];
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| 40 | } CXzFilter;
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| 41 |
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| 42 | typedef struct
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| 43 | {
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| 44 | UInt64 packSize;
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| 45 | UInt64 unpackSize;
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| 46 | Byte flags;
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| 47 | CXzFilter filters[XZ_NUM_FILTERS_MAX];
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| 48 | } CXzBlock;
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| 49 |
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| 50 | #define XzBlock_GetNumFilters(p) (((p)->flags & XZ_BF_NUM_FILTERS_MASK) + 1)
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| 51 | #define XzBlock_HasPackSize(p) (((p)->flags & XZ_BF_PACK_SIZE) != 0)
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| 52 | #define XzBlock_HasUnpackSize(p) (((p)->flags & XZ_BF_UNPACK_SIZE) != 0)
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| 53 |
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| 54 | SRes XzBlock_Parse(CXzBlock *p, const Byte *header);
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| 55 | SRes XzBlock_ReadHeader(CXzBlock *p, ISeqInStream *inStream, Bool *isIndex, UInt32 *headerSizeRes);
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| 56 |
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| 57 | /* ---------- xz stream ---------- */
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| 58 |
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| 59 | #define XZ_SIG_SIZE 6
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| 60 | #define XZ_FOOTER_SIG_SIZE 2
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| 61 |
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| 62 | extern Byte XZ_SIG[XZ_SIG_SIZE];
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| 63 | extern Byte XZ_FOOTER_SIG[XZ_FOOTER_SIG_SIZE];
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| 64 |
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| 65 | #define XZ_STREAM_FLAGS_SIZE 2
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| 66 | #define XZ_STREAM_CRC_SIZE 4
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| 67 |
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| 68 | #define XZ_STREAM_HEADER_SIZE (XZ_SIG_SIZE + XZ_STREAM_FLAGS_SIZE + XZ_STREAM_CRC_SIZE)
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| 69 | #define XZ_STREAM_FOOTER_SIZE (XZ_FOOTER_SIG_SIZE + XZ_STREAM_FLAGS_SIZE + XZ_STREAM_CRC_SIZE + 4)
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| 70 |
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| 71 | #define XZ_CHECK_MASK 0xF
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| 72 | #define XZ_CHECK_NO 0
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| 73 | #define XZ_CHECK_CRC32 1
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| 74 | #define XZ_CHECK_CRC64 4
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| 75 | #define XZ_CHECK_SHA256 10
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| 76 |
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| 77 | typedef struct
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| 78 | {
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| 79 | int mode;
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| 80 | UInt32 crc;
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| 81 | UInt64 crc64;
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| 82 | CSha256 sha;
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| 83 | } CXzCheck;
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| 84 |
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| 85 | void XzCheck_Init(CXzCheck *p, int mode);
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| 86 | void XzCheck_Update(CXzCheck *p, const void *data, size_t size);
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| 87 | int XzCheck_Final(CXzCheck *p, Byte *digest);
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| 88 |
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| 89 | typedef UInt16 CXzStreamFlags;
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| 90 |
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| 91 | #define XzFlags_IsSupported(f) ((f) <= XZ_CHECK_MASK)
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| 92 | #define XzFlags_GetCheckType(f) ((f) & XZ_CHECK_MASK)
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| 93 | #define XzFlags_HasDataCrc32(f) (Xz_GetCheckType(f) == XZ_CHECK_CRC32)
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| 94 | unsigned XzFlags_GetCheckSize(CXzStreamFlags f);
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| 95 |
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| 96 | SRes Xz_ParseHeader(CXzStreamFlags *p, const Byte *buf);
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| 97 | SRes Xz_ReadHeader(CXzStreamFlags *p, ISeqInStream *inStream);
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| 98 |
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| 99 | typedef struct
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| 100 | {
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| 101 | UInt64 unpackSize;
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| 102 | UInt64 totalSize;
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| 103 | } CXzBlockSizes;
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| 104 |
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| 105 | typedef struct
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| 106 | {
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| 107 | CXzStreamFlags flags;
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| 108 | size_t numBlocks;
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| 109 | size_t numBlocksAllocated;
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| 110 | CXzBlockSizes *blocks;
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| 111 | UInt64 startOffset;
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| 112 | } CXzStream;
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| 113 |
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| 114 | void Xz_Construct(CXzStream *p);
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| 115 | void Xz_Free(CXzStream *p, ISzAlloc *alloc);
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| 116 |
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| 117 | #define XZ_SIZE_OVERFLOW ((UInt64)(Int64)-1)
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| 118 |
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| 119 | UInt64 Xz_GetUnpackSize(const CXzStream *p);
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| 120 | UInt64 Xz_GetPackSize(const CXzStream *p);
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| 121 |
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| 122 | typedef struct
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| 123 | {
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| 124 | size_t num;
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| 125 | size_t numAllocated;
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| 126 | CXzStream *streams;
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| 127 | } CXzs;
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| 128 |
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| 129 | void Xzs_Construct(CXzs *p);
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| 130 | void Xzs_Free(CXzs *p, ISzAlloc *alloc);
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| 131 | SRes Xzs_ReadBackward(CXzs *p, ILookInStream *inStream, Int64 *startOffset, ICompressProgress *progress, ISzAlloc *alloc);
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| 132 |
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| 133 | UInt64 Xzs_GetNumBlocks(const CXzs *p);
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| 134 | UInt64 Xzs_GetUnpackSize(const CXzs *p);
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| 135 |
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| 136 | typedef enum
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| 137 | {
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| 138 | CODER_STATUS_NOT_SPECIFIED, /* use main error code instead */
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| 139 | CODER_STATUS_FINISHED_WITH_MARK, /* stream was finished with end mark. */
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| 140 | CODER_STATUS_NOT_FINISHED, /* stream was not finished */
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| 141 | CODER_STATUS_NEEDS_MORE_INPUT /* you must provide more input bytes */
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| 142 | } ECoderStatus;
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| 143 |
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| 144 | typedef enum
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| 145 | {
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| 146 | CODER_FINISH_ANY, /* finish at any point */
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| 147 | CODER_FINISH_END /* block must be finished at the end */
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| 148 | } ECoderFinishMode;
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| 149 |
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| 150 | typedef struct _IStateCoder
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| 151 | {
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| 152 | void *p;
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| 153 | void (*Free)(void *p, ISzAlloc *alloc);
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| 154 | SRes (*SetProps)(void *p, const Byte *props, size_t propSize, ISzAlloc *alloc);
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| 155 | void (*Init)(void *p);
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| 156 | SRes (*Code)(void *p, Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
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| 157 | int srcWasFinished, ECoderFinishMode finishMode, int *wasFinished);
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| 158 | } IStateCoder;
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| 159 |
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| 160 | #define MIXCODER_NUM_FILTERS_MAX 4
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| 161 |
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| 162 | typedef struct
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| 163 | {
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| 164 | ISzAlloc *alloc;
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| 165 | Byte *buf;
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| 166 | int numCoders;
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| 167 | int finished[MIXCODER_NUM_FILTERS_MAX - 1];
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| 168 | size_t pos[MIXCODER_NUM_FILTERS_MAX - 1];
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| 169 | size_t size[MIXCODER_NUM_FILTERS_MAX - 1];
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| 170 | UInt64 ids[MIXCODER_NUM_FILTERS_MAX];
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| 171 | IStateCoder coders[MIXCODER_NUM_FILTERS_MAX];
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| 172 | } CMixCoder;
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| 173 |
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| 174 | void MixCoder_Construct(CMixCoder *p, ISzAlloc *alloc);
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| 175 | void MixCoder_Free(CMixCoder *p);
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| 176 | void MixCoder_Init(CMixCoder *p);
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| 177 | SRes MixCoder_SetFromMethod(CMixCoder *p, int coderIndex, UInt64 methodId);
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| 178 | SRes MixCoder_Code(CMixCoder *p, Byte *dest, SizeT *destLen,
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| 179 | const Byte *src, SizeT *srcLen, int srcWasFinished,
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| 180 | ECoderFinishMode finishMode, ECoderStatus *status);
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| 181 |
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| 182 | typedef enum
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| 183 | {
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| 184 | XZ_STATE_STREAM_HEADER,
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| 185 | XZ_STATE_STREAM_INDEX,
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| 186 | XZ_STATE_STREAM_INDEX_CRC,
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| 187 | XZ_STATE_STREAM_FOOTER,
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| 188 | XZ_STATE_STREAM_PADDING,
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| 189 | XZ_STATE_BLOCK_HEADER,
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| 190 | XZ_STATE_BLOCK,
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| 191 | XZ_STATE_BLOCK_FOOTER
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| 192 | } EXzState;
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| 193 |
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| 194 | typedef struct
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| 195 | {
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| 196 | EXzState state;
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| 197 | UInt32 pos;
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| 198 | unsigned alignPos;
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| 199 | unsigned indexPreSize;
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| 200 |
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| 201 | CXzStreamFlags streamFlags;
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| 202 |
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| 203 | UInt32 blockHeaderSize;
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| 204 | UInt64 packSize;
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| 205 | UInt64 unpackSize;
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| 206 |
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| 207 | UInt64 numBlocks;
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| 208 | UInt64 indexSize;
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| 209 | UInt64 indexPos;
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| 210 | UInt64 padSize;
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| 211 |
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| 212 | UInt64 numStreams;
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| 213 |
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| 214 | UInt32 crc;
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| 215 | CMixCoder decoder;
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| 216 | CXzBlock block;
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| 217 | CXzCheck check;
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| 218 | CSha256 sha;
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| 219 | Byte shaDigest[SHA256_DIGEST_SIZE];
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| 220 | Byte buf[XZ_BLOCK_HEADER_SIZE_MAX];
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| 221 | } CXzUnpacker;
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| 222 |
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| 223 | SRes XzUnpacker_Create(CXzUnpacker *p, ISzAlloc *alloc);
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| 224 | void XzUnpacker_Free(CXzUnpacker *p);
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| 225 |
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| 226 | /*
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| 227 | finishMode:
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| 228 | It has meaning only if the decoding reaches output limit (*destLen).
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| 229 | LZMA_FINISH_ANY - use smallest number of input bytes
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| 230 | LZMA_FINISH_END - read EndOfStream marker after decoding
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| 231 |
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| 232 | Returns:
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| 233 | SZ_OK
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| 234 | status:
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| 235 | LZMA_STATUS_FINISHED_WITH_MARK
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| 236 | LZMA_STATUS_NOT_FINISHED
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| 237 | SZ_ERROR_DATA - Data error
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| 238 | SZ_ERROR_MEM - Memory allocation error
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| 239 | SZ_ERROR_UNSUPPORTED - Unsupported properties
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| 240 | SZ_ERROR_INPUT_EOF - It needs more bytes in input buffer (src).
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| 241 | */
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| 242 |
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| 243 |
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| 244 | SRes XzUnpacker_Code(CXzUnpacker *p, Byte *dest, SizeT *destLen,
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| 245 | const Byte *src, SizeT *srcLen, /* int srcWasFinished, */ int finishMode,
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| 246 | ECoderStatus *status);
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| 247 |
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| 248 | Bool XzUnpacker_IsStreamWasFinished(CXzUnpacker *p);
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| 249 |
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| 250 | EXTERN_C_END
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| 251 |
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| 252 | #endif
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