498 lines
13 KiB
C
498 lines
13 KiB
C
/* XzEnc.c -- Xz Encode
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2009-06-04 : Igor Pavlov : Public domain */
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#include <stdlib.h>
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#include <string.h>
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#include "7zCrc.h"
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#include "Alloc.h"
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#include "Bra.h"
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#include "CpuArch.h"
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#ifdef USE_SUBBLOCK
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#include "SbEnc.h"
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#endif
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#include "XzEnc.h"
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static void *SzBigAlloc(void *p, size_t size) { p = p; return BigAlloc(size); }
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static void SzBigFree(void *p, void *address) { p = p; BigFree(address); }
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static ISzAlloc g_BigAlloc = { SzBigAlloc, SzBigFree };
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static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
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static void SzFree(void *p, void *address) { p = p; MyFree(address); }
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static ISzAlloc g_Alloc = { SzAlloc, SzFree };
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#define XzBlock_ClearFlags(p) (p)->flags = 0;
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#define XzBlock_SetNumFilters(p, n) (p)->flags |= ((n) - 1);
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#define XzBlock_SetHasPackSize(p) (p)->flags |= XZ_BF_PACK_SIZE;
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#define XzBlock_SetHasUnpackSize(p) (p)->flags |= XZ_BF_UNPACK_SIZE;
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static SRes WriteBytes(ISeqOutStream *s, const void *buf, UInt32 size)
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{
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return (s->Write(s, buf, size) == size) ? SZ_OK : SZ_ERROR_WRITE;
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}
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static SRes WriteBytesAndCrc(ISeqOutStream *s, const void *buf, UInt32 size, UInt32 *crc)
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{
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*crc = CrcUpdate(*crc, buf, size);
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return WriteBytes(s, buf, size);
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}
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SRes Xz_WriteHeader(CXzStreamFlags f, ISeqOutStream *s)
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{
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UInt32 crc;
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Byte header[XZ_STREAM_HEADER_SIZE];
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memcpy(header, XZ_SIG, XZ_SIG_SIZE);
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header[XZ_SIG_SIZE] = (Byte)(f >> 8);
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header[XZ_SIG_SIZE + 1] = (Byte)(f & 0xFF);
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crc = CrcCalc(header + XZ_SIG_SIZE, XZ_STREAM_FLAGS_SIZE);
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SetUi32(header + XZ_SIG_SIZE + XZ_STREAM_FLAGS_SIZE, crc);
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return WriteBytes(s, header, XZ_STREAM_HEADER_SIZE);
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}
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SRes XzBlock_WriteHeader(const CXzBlock *p, ISeqOutStream *s)
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{
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Byte header[XZ_BLOCK_HEADER_SIZE_MAX];
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unsigned pos = 1;
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int numFilters, i;
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header[pos++] = p->flags;
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if (XzBlock_HasPackSize(p)) pos += Xz_WriteVarInt(header + pos, p->packSize);
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if (XzBlock_HasUnpackSize(p)) pos += Xz_WriteVarInt(header + pos, p->unpackSize);
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numFilters = XzBlock_GetNumFilters(p);
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for (i = 0; i < numFilters; i++)
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{
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const CXzFilter *f = &p->filters[i];
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pos += Xz_WriteVarInt(header + pos, f->id);
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pos += Xz_WriteVarInt(header + pos, f->propsSize);
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memcpy(header + pos, f->props, f->propsSize);
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pos += f->propsSize;
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}
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while((pos & 3) != 0)
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header[pos++] = 0;
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header[0] = (Byte)(pos >> 2);
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SetUi32(header + pos, CrcCalc(header, pos));
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return WriteBytes(s, header, pos + 4);
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}
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SRes Xz_WriteFooter(CXzStream *p, ISeqOutStream *s)
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{
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Byte buf[32];
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UInt64 globalPos;
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{
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UInt32 crc = CRC_INIT_VAL;
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unsigned pos = 1 + Xz_WriteVarInt(buf + 1, p->numBlocks);
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size_t i;
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globalPos = pos;
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buf[0] = 0;
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RINOK(WriteBytesAndCrc(s, buf, pos, &crc));
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for (i = 0; i < p->numBlocks; i++)
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{
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const CXzBlockSizes *block = &p->blocks[i];
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pos = Xz_WriteVarInt(buf, block->totalSize);
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pos += Xz_WriteVarInt(buf + pos, block->unpackSize);
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globalPos += pos;
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RINOK(WriteBytesAndCrc(s, buf, pos, &crc));
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}
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pos = ((unsigned)globalPos & 3);
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if (pos != 0)
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{
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buf[0] = buf[1] = buf[2] = 0;
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RINOK(WriteBytesAndCrc(s, buf, 4 - pos, &crc));
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globalPos += 4 - pos;
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}
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{
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SetUi32(buf, CRC_GET_DIGEST(crc));
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RINOK(WriteBytes(s, buf, 4));
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globalPos += 4;
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}
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}
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{
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UInt32 indexSize = (UInt32)((globalPos >> 2) - 1);
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SetUi32(buf + 4, indexSize);
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buf[8] = (Byte)(p->flags >> 8);
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buf[9] = (Byte)(p->flags & 0xFF);
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SetUi32(buf, CrcCalc(buf + 4, 6));
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memcpy(buf + 10, XZ_FOOTER_SIG, XZ_FOOTER_SIG_SIZE);
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return WriteBytes(s, buf, 12);
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}
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}
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SRes Xz_AddIndexRecord(CXzStream *p, UInt64 unpackSize, UInt64 totalSize, ISzAlloc *alloc)
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{
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if (p->blocks == 0 || p->numBlocksAllocated == p->numBlocks)
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{
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size_t num = (p->numBlocks + 1) * 2;
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size_t newSize = sizeof(CXzBlockSizes) * num;
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CXzBlockSizes *blocks;
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if (newSize / sizeof(CXzBlockSizes) != num)
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return SZ_ERROR_MEM;
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blocks = alloc->Alloc(alloc, newSize);
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if (blocks == 0)
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return SZ_ERROR_MEM;
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if (p->numBlocks != 0)
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{
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memcpy(blocks, p->blocks, p->numBlocks * sizeof(CXzBlockSizes));
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Xz_Free(p, alloc);
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}
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p->blocks = blocks;
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p->numBlocksAllocated = num;
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}
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{
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CXzBlockSizes *block = &p->blocks[p->numBlocks++];
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block->totalSize = totalSize;
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block->unpackSize = unpackSize;
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}
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return SZ_OK;
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}
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/* ---------- CSeqCheckInStream ---------- */
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typedef struct
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{
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ISeqInStream p;
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ISeqInStream *realStream;
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UInt64 processed;
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CXzCheck check;
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} CSeqCheckInStream;
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void SeqCheckInStream_Init(CSeqCheckInStream *p, int mode)
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{
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p->processed = 0;
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XzCheck_Init(&p->check, mode);
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}
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void SeqCheckInStream_GetDigest(CSeqCheckInStream *p, Byte *digest)
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{
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XzCheck_Final(&p->check, digest);
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}
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static SRes SeqCheckInStream_Read(void *pp, void *data, size_t *size)
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{
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CSeqCheckInStream *p = (CSeqCheckInStream *)pp;
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SRes res = p->realStream->Read(p->realStream, data, size);
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XzCheck_Update(&p->check, data, *size);
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p->processed += *size;
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return res;
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}
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/* ---------- CSeqSizeOutStream ---------- */
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typedef struct
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{
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ISeqOutStream p;
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ISeqOutStream *realStream;
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UInt64 processed;
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} CSeqSizeOutStream;
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static size_t MyWrite(void *pp, const void *data, size_t size)
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{
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CSeqSizeOutStream *p = (CSeqSizeOutStream *)pp;
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size = p->realStream->Write(p->realStream, data, size);
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p->processed += size;
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return size;
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}
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/* ---------- CSeqInFilter ---------- */
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/*
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typedef struct _IFilter
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{
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void *p;
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void (*Free)(void *p, ISzAlloc *alloc);
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SRes (*SetProps)(void *p, const Byte *props, size_t propSize, ISzAlloc *alloc);
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void (*Init)(void *p);
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size_t (*Filter)(void *p, Byte *data, SizeT destLen);
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} IFilter;
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#define FILT_BUF_SIZE (1 << 19)
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typedef struct
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{
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ISeqInStream p;
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ISeqInStream *realStream;
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UInt32 x86State;
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UInt32 ip;
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UInt64 processed;
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CXzCheck check;
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Byte buf[FILT_BUF_SIZE];
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UInt32 bufferPos;
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UInt32 convertedPosBegin;
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UInt32 convertedPosEnd;
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IFilter *filter;
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} CSeqInFilter;
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static SRes SeqInFilter_Read(void *pp, void *data, size_t *size)
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{
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CSeqInFilter *p = (CSeqInFilter *)pp;
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size_t remSize = *size;
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*size = 0;
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while (remSize > 0)
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{
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int i;
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if (p->convertedPosBegin != p->convertedPosEnd)
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{
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UInt32 sizeTemp = p->convertedPosEnd - p->convertedPosBegin;
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if (remSize < sizeTemp)
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sizeTemp = (UInt32)remSize;
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memmove(data, p->buf + p->convertedPosBegin, sizeTemp);
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p->convertedPosBegin += sizeTemp;
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data = (void *)((Byte *)data + sizeTemp);
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remSize -= sizeTemp;
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*size += sizeTemp;
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break;
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}
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for (i = 0; p->convertedPosEnd + i < p->bufferPos; i++)
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p->buf[i] = p->buf[i + p->convertedPosEnd];
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p->bufferPos = i;
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p->convertedPosBegin = p->convertedPosEnd = 0;
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{
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size_t processedSizeTemp = FILT_BUF_SIZE - p->bufferPos;
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RINOK(p->realStream->Read(p->realStream, p->buf + p->bufferPos, &processedSizeTemp));
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p->bufferPos = p->bufferPos + (UInt32)processedSizeTemp;
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}
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p->convertedPosEnd = (UInt32)p->filter->Filter(p->filter->p, p->buf, p->bufferPos);
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if (p->convertedPosEnd == 0)
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{
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if (p->bufferPos == 0)
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break;
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else
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{
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p->convertedPosEnd = p->bufferPos;
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continue;
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}
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}
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if (p->convertedPosEnd > p->bufferPos)
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{
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for (; p->bufferPos < p->convertedPosEnd; p->bufferPos++)
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p->buf[p->bufferPos] = 0;
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p->convertedPosEnd = (UInt32)p->filter->Filter(p->filter->p, p->buf, p->bufferPos);
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}
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}
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return SZ_OK;
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}
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*/
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/*
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typedef struct
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{
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ISeqInStream p;
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ISeqInStream *realStream;
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CMixCoder mixCoder;
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Byte buf[FILT_BUF_SIZE];
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UInt32 bufPos;
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UInt32 bufSize;
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} CMixCoderSeqInStream;
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static SRes CMixCoderSeqInStream_Read(void *pp, void *data, size_t *size)
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{
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CMixCoderSeqInStream *p = (CMixCoderSeqInStream *)pp;
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SRes res = SZ_OK;
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size_t remSize = *size;
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*size = 0;
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while (remSize > 0)
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{
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if (p->bufPos == p->bufSize)
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{
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size_t curSize;
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p->bufPos = p->bufSize = 0;
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if (*size != 0)
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break;
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curSize = FILT_BUF_SIZE;
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RINOK(p->realStream->Read(p->realStream, p->buf, &curSize));
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p->bufSize = (UInt32)curSize;
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}
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{
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SizeT destLen = remSize;
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SizeT srcLen = p->bufSize - p->bufPos;
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res = MixCoder_Code(&p->mixCoder, data, &destLen, p->buf + p->bufPos, &srcLen, 0);
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data = (void *)((Byte *)data + destLen);
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remSize -= destLen;
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*size += destLen;
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p->bufPos += srcLen;
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}
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}
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return res;
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}
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*/
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#ifdef USE_SUBBLOCK
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typedef struct
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{
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ISeqInStream p;
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CSubblockEnc sb;
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UInt64 processed;
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} CSbEncInStream;
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void SbEncInStream_Init(CSbEncInStream *p)
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{
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p->processed = 0;
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SubblockEnc_Init(&p->sb);
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}
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static SRes SbEncInStream_Read(void *pp, void *data, size_t *size)
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{
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CSbEncInStream *p = (CSbEncInStream *)pp;
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SRes res = SubblockEnc_Read(&p->sb, data, size);
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p->processed += *size;
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return res;
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}
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#endif
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typedef struct
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{
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/* CMixCoderSeqInStream inStream; */
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CLzma2EncHandle lzma2;
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#ifdef USE_SUBBLOCK
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CSbEncInStream sb;
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#endif
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ISzAlloc *alloc;
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ISzAlloc *bigAlloc;
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} CLzma2WithFilters;
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static void Lzma2WithFilters_Construct(CLzma2WithFilters *p, ISzAlloc *alloc, ISzAlloc *bigAlloc)
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{
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p->alloc = alloc;
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p->bigAlloc = bigAlloc;
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p->lzma2 = NULL;
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#ifdef USE_SUBBLOCK
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p->sb.p.Read = SbEncInStream_Read;
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SubblockEnc_Construct(&p->sb.sb, p->alloc);
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#endif
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}
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static SRes Lzma2WithFilters_Create(CLzma2WithFilters *p)
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{
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p->lzma2 = Lzma2Enc_Create(p->alloc, p->bigAlloc);
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if (p->lzma2 == 0)
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return SZ_ERROR_MEM;
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return SZ_OK;
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}
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static void Lzma2WithFilters_Free(CLzma2WithFilters *p)
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{
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#ifdef USE_SUBBLOCK
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SubblockEnc_Free(&p->sb.sb);
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#endif
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if (p->lzma2)
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{
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Lzma2Enc_Destroy(p->lzma2);
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p->lzma2 = NULL;
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}
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}
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static SRes Xz_Compress(CXzStream *xz,
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CLzma2WithFilters *lzmaf,
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ISeqOutStream *outStream,
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ISeqInStream *inStream,
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const CLzma2EncProps *lzma2Props,
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Bool useSubblock,
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ICompressProgress *progress)
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{
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xz->flags = XZ_CHECK_CRC32;
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RINOK(Lzma2Enc_SetProps(lzmaf->lzma2, lzma2Props));
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RINOK(Xz_WriteHeader(xz->flags, outStream));
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{
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CSeqCheckInStream checkInStream;
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CSeqSizeOutStream seqSizeOutStream;
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CXzBlock block;
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int filterIndex = 0;
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XzBlock_ClearFlags(&block);
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XzBlock_SetNumFilters(&block, 1 + (useSubblock ? 1 : 0));
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if (useSubblock)
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{
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CXzFilter *f = &block.filters[filterIndex++];
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f->id = XZ_ID_Subblock;
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f->propsSize = 0;
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}
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{
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CXzFilter *f = &block.filters[filterIndex++];
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f->id = XZ_ID_LZMA2;
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f->propsSize = 1;
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f->props[0] = Lzma2Enc_WriteProperties(lzmaf->lzma2);
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}
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seqSizeOutStream.p.Write = MyWrite;
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seqSizeOutStream.realStream = outStream;
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seqSizeOutStream.processed = 0;
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RINOK(XzBlock_WriteHeader(&block, &seqSizeOutStream.p));
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checkInStream.p.Read = SeqCheckInStream_Read;
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checkInStream.realStream = inStream;
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SeqCheckInStream_Init(&checkInStream, XzFlags_GetCheckType(xz->flags));
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#ifdef USE_SUBBLOCK
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if (useSubblock)
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{
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lzmaf->sb.sb.inStream = &checkInStream.p;
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SubblockEnc_Init(&lzmaf->sb.sb);
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}
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#endif
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{
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UInt64 packPos = seqSizeOutStream.processed;
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SRes res = Lzma2Enc_Encode(lzmaf->lzma2, &seqSizeOutStream.p,
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#ifdef USE_SUBBLOCK
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useSubblock ? &lzmaf->sb.p:
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#endif
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&checkInStream.p,
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progress);
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RINOK(res);
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block.unpackSize = checkInStream.processed;
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block.packSize = seqSizeOutStream.processed - packPos;
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}
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{
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unsigned padSize = 0;
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Byte buf[128];
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while((((unsigned)block.packSize + padSize) & 3) != 0)
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buf[padSize++] = 0;
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SeqCheckInStream_GetDigest(&checkInStream, buf + padSize);
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RINOK(WriteBytes(&seqSizeOutStream.p, buf, padSize + XzFlags_GetCheckSize(xz->flags)));
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RINOK(Xz_AddIndexRecord(xz, block.unpackSize, seqSizeOutStream.processed - padSize, &g_Alloc));
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}
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}
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return Xz_WriteFooter(xz, outStream);
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}
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SRes Xz_Encode(ISeqOutStream *outStream, ISeqInStream *inStream,
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const CLzma2EncProps *lzma2Props, Bool useSubblock,
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ICompressProgress *progress)
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{
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SRes res;
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CXzStream xz;
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CLzma2WithFilters lzmaf;
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Xz_Construct(&xz);
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Lzma2WithFilters_Construct(&lzmaf, &g_Alloc, &g_BigAlloc);
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res = Lzma2WithFilters_Create(&lzmaf);
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if (res == SZ_OK)
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res = Xz_Compress(&xz, &lzmaf, outStream, inStream,
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lzma2Props, useSubblock, progress);
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Lzma2WithFilters_Free(&lzmaf);
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Xz_Free(&xz, &g_Alloc);
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return res;
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}
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SRes Xz_EncodeEmpty(ISeqOutStream *outStream)
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{
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SRes res;
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CXzStream xz;
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Xz_Construct(&xz);
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res = Xz_WriteHeader(xz.flags, outStream);
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if (res == SZ_OK)
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res = Xz_WriteFooter(&xz, outStream);
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Xz_Free(&xz, &g_Alloc);
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return res;
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}
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