// XzHandler.cpp

#include "StdAfx.h"

#include "Alloc.h"
#include "XzCrc64.h"
#include "XzEnc.h"

#include "Common/ComTry.h"
#include "Common/Defs.h"
#include "Common/IntToString.h"

#include "Windows/PropVariant.h"

#include "7zip/ICoder.h"

#include "7zip/Common/CWrappers.h"
#include "7zip/Common/ProgressUtils.h"
#include "7zip/Common/RegisterArc.h"
#include "7zip/Common/StreamUtils.h"

#include "7zip/Compress/CopyCoder.h"

#include "7zip/Archive/IArchive.h"

#ifndef EXTRACT_ONLY
#include "7zip/Archive/Common/HandlerOut.h"
#endif

#include "7zip/Archive/XzHandler.h"

using namespace NWindows;

namespace NCompress {
namespace NLzma2 {

HRESULT SetLzma2Prop(PROPID propID, const PROPVARIANT &prop, CLzma2EncProps &lzma2Props);

}}

namespace NArchive {
namespace NXz {

struct CCrc64Gen { CCrc64Gen() { Crc64GenerateTable(); } } g_Crc64TableInit;

static const char *k_LZMA2_Name = "LZMA2";

void CStatInfo::Clear()
{
  InSize = 0;
  OutSize = 0;
  PhySize = 0;
  
  NumStreams = 0;
  NumBlocks = 0;
  
  UnpackSize_Defined = false;
  
  NumStreams_Defined = false;
  NumBlocks_Defined = false;
  
  IsArc = false;
  UnexpectedEnd = false;
  DataAfterEnd = false;
  Unsupported = false;
  HeadersError = false;
  DataError = false;
  CrcError = false;
}

class CHandler:
  public IInArchive,
  public IArchiveOpenSeq,
  #ifndef EXTRACT_ONLY
  public IOutArchive,
  public ISetProperties,
  public CMultiMethodProps,
  #endif
  public CMyUnknownImp
{
  CStatInfo _stat;
  
  bool _isArc;
  bool _needSeekToStart;
  bool _phySize_Defined;
  
  CMyComPtr<IInStream> _stream;
  CMyComPtr<ISequentialInStream> _seqStream;

  AString _methodsString;

  #ifndef EXTRACT_ONLY

  UInt32 _filterId;

  void Init()
  {
    _filterId = 0;
    CMultiMethodProps::Init();
  }
  
  #endif

  HRESULT Open2(IInStream *inStream, /* UInt32 flags, */ IArchiveOpenCallback *callback);

  HRESULT Decode2(ISequentialInStream *seqInStream, ISequentialOutStream *outStream,
      CDecoder &decoder, ICompressProgressInfo *progress)
  {
    RINOK(decoder.Decode(seqInStream, outStream, progress));
    _stat = decoder;
    _phySize_Defined = true;
    return S_OK;
  }

public:
  MY_QUERYINTERFACE_BEGIN2(IInArchive)
  MY_QUERYINTERFACE_ENTRY(IArchiveOpenSeq)
  #ifndef EXTRACT_ONLY
  MY_QUERYINTERFACE_ENTRY(IOutArchive)
  MY_QUERYINTERFACE_ENTRY(ISetProperties)
  #endif
  MY_QUERYINTERFACE_END
  MY_ADDREF_RELEASE

  INTERFACE_IInArchive(;)
  STDMETHOD(OpenSeq)(ISequentialInStream *stream);

  #ifndef EXTRACT_ONLY
  INTERFACE_IOutArchive(;)
  STDMETHOD(SetProperties)(const wchar_t * const *names, const PROPVARIANT *values, UInt32 numProps);
  #endif

  CHandler();
};

CHandler::CHandler()
{
  #ifndef EXTRACT_ONLY
  Init();
  #endif
}


static const Byte kProps[] =
{
  kpidSize,
  kpidPackSize,
  kpidMethod
};

static const Byte kArcProps[] =
{
  kpidMethod,
  kpidNumStreams,
  kpidNumBlocks
};

IMP_IInArchive_Props
IMP_IInArchive_ArcProps

static inline char GetHex(unsigned value)
{
  return (char)((value < 10) ? ('0' + value) : ('A' + (value - 10)));
}

static inline void AddHexToString(AString &s, Byte value)
{
  s += GetHex(value >> 4);
  s += GetHex(value & 0xF);
}

static void AddUInt32ToString(AString &s, UInt32 value)
{
  char temp[16];
  ConvertUInt32ToString(value, temp);
  s += temp;
}

static void Lzma2PropToString(AString &s, unsigned prop)
{
  char c = 0;
  UInt32 size;
  if ((prop & 1) == 0)
    size = prop / 2 + 12;
  else
  {
    c = 'k';
    size = (UInt32)(2 | (prop & 1)) << (prop / 2 + 1);
    if (prop > 17)
    {
      size >>= 10;
      c = 'm';
    }
  }
  AddUInt32ToString(s, size);
  if (c != 0)
    s += c;
}

struct CMethodNamePair
{
  UInt32 Id;
  const char *Name;
};

static const CMethodNamePair g_NamePairs[] =
{
  { XZ_ID_Subblock, "SB" },
  { XZ_ID_Delta, "Delta" },
  { XZ_ID_X86, "BCJ" },
  { XZ_ID_PPC, "PPC" },
  { XZ_ID_IA64, "IA64" },
  { XZ_ID_ARM, "ARM" },
  { XZ_ID_ARMT, "ARMT" },
  { XZ_ID_SPARC, "SPARC" },
  { XZ_ID_LZMA2, "LZMA2" }
};

static AString GetMethodString(const CXzFilter &f)
{
  const char *p = NULL;
  for (unsigned i = 0; i < ARRAY_SIZE(g_NamePairs); i++)
    if (g_NamePairs[i].Id == f.id)
    {
      p = g_NamePairs[i].Name;
      break;
    }
  char temp[32];
  if (!p)
  {
    ::ConvertUInt64ToString(f.id, temp);
    p = temp;
  }

  AString s = p;

  if (f.propsSize > 0)
  {
    s += ':';
    if (f.id == XZ_ID_LZMA2 && f.propsSize == 1)
      Lzma2PropToString(s, f.props[0]);
    else if (f.id == XZ_ID_Delta && f.propsSize == 1)
      AddUInt32ToString(s, (UInt32)f.props[0] + 1);
    else
    {
      s += '[';
      for (UInt32 bi = 0; bi < f.propsSize; bi++)
        AddHexToString(s, f.props[bi]);
      s += ']';
    }
  }
  return s;
}

static void AddString(AString &dest, const AString &src)
{
  dest.Add_Space_if_NotEmpty();
  dest += src;
}

static const char * const kChecks[] =
{
    "NoCheck"
  , "CRC32"
  , NULL
  , NULL
  , "CRC64"
  , NULL
  , NULL
  , NULL
  , NULL
  , NULL
  , "SHA256"
  , NULL
  , NULL
  , NULL
  , NULL
  , NULL
};

static AString GetCheckString(const CXzs &xzs)
{
  size_t i;
  UInt32 mask = 0;
  for (i = 0; i < xzs.num; i++)
    mask |= ((UInt32)1 << XzFlags_GetCheckType(xzs.streams[i].flags));
  AString s;
  for (i = 0; i <= XZ_CHECK_MASK; i++)
    if (((mask >> i) & 1) != 0)
    {
      AString s2;
      if (kChecks[i])
        s2 = kChecks[i];
      else
      {
        s2 = "Check-";
        AddUInt32ToString(s2, (UInt32)i);
      }
      AddString(s, s2);
    }
  return s;
}

STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
  COM_TRY_BEGIN
  NCOM::CPropVariant prop;
  switch (propID)
  {
    case kpidPhySize: if (_phySize_Defined) prop = _stat.PhySize; break;
    case kpidNumStreams: if (_stat.NumStreams_Defined) prop = _stat.NumStreams; break;
    case kpidNumBlocks: if (_stat.NumBlocks_Defined) prop = _stat.NumBlocks; break;
    case kpidUnpackSize: if (_stat.UnpackSize_Defined) prop = _stat.OutSize; break;
    case kpidMethod: if (!_methodsString.IsEmpty()) prop = _methodsString; break;
    case kpidErrorFlags:
    {
      UInt32 v = 0;
      if (!_isArc) v |= kpv_ErrorFlags_IsNotArc;;
      if (_stat.UnexpectedEnd) v |= kpv_ErrorFlags_UnexpectedEnd;
      if (_stat.DataAfterEnd) v |= kpv_ErrorFlags_DataAfterEnd;
      if (_stat.HeadersError) v |= kpv_ErrorFlags_HeadersError;
      if (_stat.Unsupported) v |= kpv_ErrorFlags_UnsupportedMethod;
      if (_stat.DataError) v |= kpv_ErrorFlags_DataError;
      if (_stat.CrcError) v |= kpv_ErrorFlags_CrcError;
      prop = v;
    }
  }
  prop.Detach(value);
  return S_OK;
  COM_TRY_END
}

STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
  *numItems = 1;
  return S_OK;
}

STDMETHODIMP CHandler::GetProperty(UInt32, PROPID propID, PROPVARIANT *value)
{
  COM_TRY_BEGIN
  NCOM::CPropVariant prop;
  switch (propID)
  {
    case kpidSize: if (_stat.UnpackSize_Defined) prop = _stat.OutSize; break;
    case kpidPackSize: if (_phySize_Defined) prop = _stat.PhySize; break;
    case kpidMethod: if (!_methodsString.IsEmpty()) prop = _methodsString; break;
  }
  prop.Detach(value);
  return S_OK;
  COM_TRY_END
}


struct COpenCallbackWrap
{
  ICompressProgress p;
  IArchiveOpenCallback *OpenCallback;
  HRESULT Res;
  COpenCallbackWrap(IArchiveOpenCallback *progress);
};

static SRes OpenCallbackProgress(void *pp, UInt64 inSize, UInt64 /* outSize */)
{
  COpenCallbackWrap *p = (COpenCallbackWrap *)pp;
  if (p->OpenCallback)
    p->Res = p->OpenCallback->SetCompleted(NULL, &inSize);
  return (SRes)p->Res;
}

COpenCallbackWrap::COpenCallbackWrap(IArchiveOpenCallback *callback)
{
  p.Progress = OpenCallbackProgress;
  OpenCallback = callback;
  Res = SZ_OK;
}

struct CXzsCPP
{
  CXzs p;
  CXzsCPP() { Xzs_Construct(&p); }
  ~CXzsCPP() { Xzs_Free(&p, &g_Alloc); }
};

static HRESULT SRes_to_Open_HRESULT(SRes res)
{
  switch (res)
  {
    case SZ_OK: return S_OK;
    case SZ_ERROR_MEM: return E_OUTOFMEMORY;
    case SZ_ERROR_PROGRESS: return E_ABORT;
    /*
    case SZ_ERROR_UNSUPPORTED:
    case SZ_ERROR_CRC:
    case SZ_ERROR_DATA:
    case SZ_ERROR_ARCHIVE:
    case SZ_ERROR_NO_ARCHIVE:
      return S_FALSE;
    */
  }
  return S_FALSE;
}

HRESULT CHandler::Open2(IInStream *inStream, /* UInt32 flags, */ IArchiveOpenCallback *callback)
{
  _needSeekToStart = true;

  {
    CXzStreamFlags st;
    CSeqInStreamWrap inStreamWrap(inStream);
    SRes res = Xz_ReadHeader(&st, &inStreamWrap.p);
    if (res != SZ_OK)
      return SRes_to_Open_HRESULT(res);

    {
      CXzBlock block;
      Bool isIndex;
      UInt32 headerSizeRes;
      SRes res2 = XzBlock_ReadHeader(&block, &inStreamWrap.p, &isIndex, &headerSizeRes);
      if (res2 == SZ_OK && !isIndex)
      {
        unsigned numFilters = XzBlock_GetNumFilters(&block);
        for (unsigned i = 0; i < numFilters; i++)
          AddString(_methodsString, GetMethodString(block.filters[i]));
      }
    }
  }

  RINOK(inStream->Seek(0, STREAM_SEEK_END, &_stat.PhySize));
  if (callback)
  {
    RINOK(callback->SetTotal(NULL, &_stat.PhySize));
  }

  CSeekInStreamWrap inStreamImp(inStream);

  CLookToRead lookStream;
  LookToRead_CreateVTable(&lookStream, True);
  lookStream.realStream = &inStreamImp.p;
  LookToRead_Init(&lookStream);

  COpenCallbackWrap openWrap(callback);

  CXzsCPP xzs;
  Int64 startPosition;
  SRes res = Xzs_ReadBackward(&xzs.p, &lookStream.s, &startPosition, &openWrap.p, &g_Alloc);
  if (res == SZ_ERROR_PROGRESS)
    return (openWrap.Res == S_OK) ? E_FAIL : openWrap.Res;
  /*
  if (res == SZ_ERROR_NO_ARCHIVE && xzs.p.num > 0)
    res = SZ_OK;
  */
  if (res == SZ_OK && startPosition == 0)
  {
    _phySize_Defined = true;

    _stat.OutSize = Xzs_GetUnpackSize(&xzs.p);
    _stat.UnpackSize_Defined = true;

    _stat.NumStreams = xzs.p.num;
    _stat.NumStreams_Defined = true;
    
    _stat.NumBlocks = Xzs_GetNumBlocks(&xzs.p);
    _stat.NumBlocks_Defined = true;

    AddString(_methodsString, GetCheckString(xzs.p));
  }
  else
  {
    res = SZ_OK;
  }

  RINOK(SRes_to_Open_HRESULT(res));
  _stream = inStream;
  _seqStream = inStream;
  _isArc = true;
  return S_OK;
}

STDMETHODIMP CHandler::Open(IInStream *inStream, const UInt64 *, IArchiveOpenCallback *callback)
{
  COM_TRY_BEGIN
  {
    Close();
    return Open2(inStream, callback);
  }
  COM_TRY_END
}

STDMETHODIMP CHandler::OpenSeq(ISequentialInStream *stream)
{
  Close();
  _seqStream = stream;
  _isArc = true;
  _needSeekToStart = false;
  return S_OK;
}

STDMETHODIMP CHandler::Close()
{
  _stat.Clear();

  _isArc = false;
  _needSeekToStart = false;

  _phySize_Defined = false;
  
   _methodsString.Empty();
  _stream.Release();
  _seqStream.Release();
  return S_OK;
}

class CSeekToSeqStream:
  public IInStream,
  public CMyUnknownImp
{
public:
  CMyComPtr<ISequentialInStream> Stream;
  MY_UNKNOWN_IMP1(IInStream)

  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
};

STDMETHODIMP CSeekToSeqStream::Read(void *data, UInt32 size, UInt32 *processedSize)
{
  return Stream->Read(data, size, processedSize);
}

STDMETHODIMP CSeekToSeqStream::Seek(Int64, UInt32, UInt64 *) { return E_NOTIMPL; }

CXzUnpackerCPP::CXzUnpackerCPP(): InBuf(0), OutBuf(0)
{
  XzUnpacker_Construct(&p, &g_Alloc);
}

CXzUnpackerCPP::~CXzUnpackerCPP()
{
  XzUnpacker_Free(&p);
  MyFree(InBuf);
  MyFree(OutBuf);
}

HRESULT CDecoder::Decode(ISequentialInStream *seqInStream, ISequentialOutStream *outStream, ICompressProgressInfo *progress)
{
  const size_t kInBufSize = 1 << 15;
  const size_t kOutBufSize = 1 << 21;

  Clear();
  DecodeRes = SZ_OK;

  XzUnpacker_Init(&xzu.p);
  if (!xzu.InBuf)
    xzu.InBuf = (Byte *)MyAlloc(kInBufSize);
  if (!xzu.OutBuf)
    xzu.OutBuf = (Byte *)MyAlloc(kOutBufSize);
  
  UInt32 inSize = 0;
  SizeT inPos = 0;
  SizeT outPos = 0;

  for (;;)
  {
    if (inPos == inSize)
    {
      inPos = inSize = 0;
      RINOK(seqInStream->Read(xzu.InBuf, kInBufSize, &inSize));
    }

    SizeT inLen = inSize - inPos;
    SizeT outLen = kOutBufSize - outPos;
    ECoderStatus status;
    
    SRes res = XzUnpacker_Code(&xzu.p,
        xzu.OutBuf + outPos, &outLen,
        xzu.InBuf + inPos, &inLen,
        (inSize == 0 ? CODER_FINISH_END : CODER_FINISH_ANY), &status);

    inPos += inLen;
    outPos += outLen;

    InSize += inLen;
    OutSize += outLen;

    DecodeRes = res;

    bool finished = ((inLen == 0 && outLen == 0) || res != SZ_OK);

    if (outStream)
    {
      if (outPos == kOutBufSize || finished)
      {
        if (outPos != 0)
        {
          RINOK(WriteStream(outStream, xzu.OutBuf, outPos));
          outPos = 0;
        }
      }
    }
    else
      outPos = 0;
    
    if (progress)
    {
      RINOK(progress->SetRatioInfo(&InSize, &OutSize));
    }
    
    if (finished)
    {
      PhySize = InSize;
      NumStreams = xzu.p.numStartedStreams;
      if (NumStreams > 0)
        IsArc = true;
      NumBlocks = xzu.p.numTotalBlocks;

      UnpackSize_Defined = true;
      NumStreams_Defined = true;
      NumBlocks_Defined = true;

      UInt64 extraSize = XzUnpacker_GetExtraSize(&xzu.p);

      if (res == SZ_OK)
      {
        if (status == CODER_STATUS_NEEDS_MORE_INPUT)
        {
          extraSize = 0;
          if (!XzUnpacker_IsStreamWasFinished(&xzu.p))
          {
            // finished at padding bytes, but padding is not aligned for 4
            UnexpectedEnd = true;
            res = SZ_ERROR_DATA;
          }
        }
        else // status == CODER_STATUS_NOT_FINISHED
          res = SZ_ERROR_DATA;
      }
      else if (res == SZ_ERROR_NO_ARCHIVE)
      {
        if (InSize == extraSize)
          IsArc = false;
        else
        {
          if (extraSize != 0 || inPos != inSize)
          {
            DataAfterEnd = true;
            res = SZ_OK;
          }
        }
      }

      DecodeRes = res;
      PhySize -= extraSize;

      switch (res)
      {
        case SZ_OK: break;
        case SZ_ERROR_NO_ARCHIVE: IsArc = false; break;
        case SZ_ERROR_ARCHIVE: HeadersError = true; break;
        case SZ_ERROR_UNSUPPORTED: Unsupported = true; break;
        case SZ_ERROR_CRC: CrcError = true; break;
        case SZ_ERROR_DATA: DataError = true; break;
        default: DataError = true; break;
      }

      break;
    }
  }

  return S_OK;
}

Int32 CDecoder::Get_Extract_OperationResult() const
{
  Int32 opRes;
  if (!IsArc)
    opRes = NExtract::NOperationResult::kIsNotArc;
  else if (UnexpectedEnd)
    opRes = NExtract::NOperationResult::kUnexpectedEnd;
  else if (DataAfterEnd)
    opRes = NExtract::NOperationResult::kDataAfterEnd;
  else if (CrcError)
    opRes = NExtract::NOperationResult::kCRCError;
  else if (Unsupported)
    opRes = NExtract::NOperationResult::kUnsupportedMethod;
  else if (HeadersError)
    opRes = NExtract::NOperationResult::kDataError;
  else if (DataError)
    opRes = NExtract::NOperationResult::kDataError;
  else if (DecodeRes != SZ_OK)
    opRes = NExtract::NOperationResult::kDataError;
  else
    opRes = NExtract::NOperationResult::kOK;
  return opRes;
}

STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
    Int32 testMode, IArchiveExtractCallback *extractCallback)
{
  COM_TRY_BEGIN
  if (numItems == 0)
    return S_OK;
  if (numItems != (UInt32)(Int32)-1 && (numItems != 1 || indices[0] != 0))
    return E_INVALIDARG;

  if (_phySize_Defined)
    extractCallback->SetTotal(_stat.PhySize);

  UInt64 currentTotalPacked = 0;
  RINOK(extractCallback->SetCompleted(&currentTotalPacked));
  CMyComPtr<ISequentialOutStream> realOutStream;
  Int32 askMode = testMode ?
      NExtract::NAskMode::kTest :
      NExtract::NAskMode::kExtract;
  
  RINOK(extractCallback->GetStream(0, &realOutStream, askMode));
  
  if (!testMode && !realOutStream)
    return S_OK;

  extractCallback->PrepareOperation(askMode);

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> lpsRef = lps;
  lps->Init(extractCallback, true);

  if (_needSeekToStart)
  {
    if (!_stream)
      return E_FAIL;
    RINOK(_stream->Seek(0, STREAM_SEEK_SET, NULL));
  }
  else
    _needSeekToStart = true;

  CDecoder decoder;
  RINOK(Decode2(_seqStream, realOutStream, decoder, lpsRef));
  Int32 opRes = decoder.Get_Extract_OperationResult();

  realOutStream.Release();
  return extractCallback->SetOperationResult(opRes);
  COM_TRY_END
}

#ifndef EXTRACT_ONLY

STDMETHODIMP CHandler::GetFileTimeType(UInt32 *timeType)
{
  *timeType = NFileTimeType::kUnix;
  return S_OK;
}

STDMETHODIMP CHandler::UpdateItems(ISequentialOutStream *outStream, UInt32 numItems,
    IArchiveUpdateCallback *updateCallback)
{
  COM_TRY_BEGIN

  CSeqOutStreamWrap seqOutStream(outStream);
  
  if (numItems == 0)
  {
    SRes res = Xz_EncodeEmpty(&seqOutStream.p);
    return SResToHRESULT(res);
  }
  
  if (numItems != 1)
    return E_INVALIDARG;

  Int32 newData, newProps;
  UInt32 indexInArchive;
  if (!updateCallback)
    return E_FAIL;
  RINOK(updateCallback->GetUpdateItemInfo(0, &newData, &newProps, &indexInArchive));

  if (IntToBool(newProps))
  {
    {
      NCOM::CPropVariant prop;
      RINOK(updateCallback->GetProperty(0, kpidIsDir, &prop));
      if (prop.vt != VT_EMPTY)
        if (prop.vt != VT_BOOL || prop.boolVal != VARIANT_FALSE)
          return E_INVALIDARG;
    }
  }

  if (IntToBool(newData))
  {
    UInt64 size;
    {
      NCOM::CPropVariant prop;
      RINOK(updateCallback->GetProperty(0, kpidSize, &prop));
      if (prop.vt != VT_UI8)
        return E_INVALIDARG;
      size = prop.uhVal.QuadPart;
      RINOK(updateCallback->SetTotal(size));
    }

    CLzma2EncProps lzma2Props;
    Lzma2EncProps_Init(&lzma2Props);

    lzma2Props.lzmaProps.level = GetLevel();

    CMyComPtr<ISequentialInStream> fileInStream;
    RINOK(updateCallback->GetStream(0, &fileInStream));

    CSeqInStreamWrap seqInStream(fileInStream);

    {
      NCOM::CPropVariant prop = (UInt64)size;
      RINOK(NCompress::NLzma2::SetLzma2Prop(NCoderPropID::kReduceSize, prop, lzma2Props));
    }

    FOR_VECTOR (i, _methods)
    {
      COneMethodInfo &m = _methods[i];
      SetGlobalLevelAndThreads(m
      #ifndef _7ZIP_ST
      , _numThreads
      #endif
      );
      {
        FOR_VECTOR (j, m.Props)
        {
          const CProp &prop = m.Props[j];
          RINOK(NCompress::NLzma2::SetLzma2Prop(prop.Id, prop.Value, lzma2Props));
        }
      }
    }

    #ifndef _7ZIP_ST
    lzma2Props.numTotalThreads = _numThreads;
    #endif

    CLocalProgress *lps = new CLocalProgress;
    CMyComPtr<ICompressProgressInfo> progress = lps;
    lps->Init(updateCallback, true);

    CCompressProgressWrap progressWrap(progress);
    CXzProps xzProps;
    CXzFilterProps filter;
    XzProps_Init(&xzProps);
    XzFilterProps_Init(&filter);
    xzProps.lzma2Props = &lzma2Props;
    xzProps.filterProps = (_filterId != 0 ? &filter : NULL);
    switch (_crcSize)
    {
      case  0: xzProps.checkId = XZ_CHECK_NO; break;
      case  4: xzProps.checkId = XZ_CHECK_CRC32; break;
      case  8: xzProps.checkId = XZ_CHECK_CRC64; break;
      case 32: xzProps.checkId = XZ_CHECK_SHA256; break;
      default: return E_INVALIDARG;
    }
    filter.id = _filterId;
    if (_filterId == XZ_ID_Delta)
    {
      bool deltaDefined = false;
      FOR_VECTOR (j, _filterMethod.Props)
      {
        const CProp &prop = _filterMethod.Props[j];
        if (prop.Id == NCoderPropID::kDefaultProp && prop.Value.vt == VT_UI4)
        {
          UInt32 delta = (UInt32)prop.Value.ulVal;
          if (delta < 1 || delta > 256)
            return E_INVALIDARG;
          filter.delta = delta;
          deltaDefined = true;
        }
      }
      if (!deltaDefined)
        return E_INVALIDARG;
    }
    SRes res = Xz_Encode(&seqOutStream.p, &seqInStream.p, &xzProps, &progressWrap.p);
    if (res == SZ_OK)
      return updateCallback->SetOperationResult(NArchive::NUpdate::NOperationResult::kOK);
    return SResToHRESULT(res);
  }

  if (indexInArchive != 0)
    return E_INVALIDARG;

  CMyComPtr<IArchiveUpdateCallbackFile> opCallback;
  updateCallback->QueryInterface(IID_IArchiveUpdateCallbackFile, (void **)&opCallback);
  if (opCallback)
  {
    RINOK(opCallback->ReportOperation(NEventIndexType::kInArcIndex, 0, NUpdateNotifyOp::kReplicate))
  }

  if (_stream)
  {
    if (_phySize_Defined)
      RINOK(updateCallback->SetTotal(_stat.PhySize));
    RINOK(_stream->Seek(0, STREAM_SEEK_SET, NULL));
  }

  CLocalProgress *lps = new CLocalProgress;
  CMyComPtr<ICompressProgressInfo> progress = lps;
  lps->Init(updateCallback, true);

  return NCompress::CopyStream(_stream, outStream, progress);

  COM_TRY_END
}

STDMETHODIMP CHandler::SetProperties(const wchar_t * const *names, const PROPVARIANT *values, UInt32 numProps)
{
  COM_TRY_BEGIN

  Init();
  for (UInt32 i = 0; i < numProps; i++)
  {
    RINOK(SetProperty(names[i], values[i]));
  }

  if (!_filterMethod.MethodName.IsEmpty())
  {
    unsigned k;
    for (k = 0; k < ARRAY_SIZE(g_NamePairs); k++)
    {
      const CMethodNamePair &pair = g_NamePairs[k];
      if (StringsAreEqualNoCase_Ascii(_filterMethod.MethodName, pair.Name))
      {
        _filterId = pair.Id;
        break;
      }
    }
    if (k == ARRAY_SIZE(g_NamePairs))
      return E_INVALIDARG;
  }

  _methods.DeleteFrontal(GetNumEmptyMethods());
  if (_methods.Size() > 1)
    return E_INVALIDARG;
  if (_methods.Size() == 1)
  {
    AString &methodName = _methods[0].MethodName;
    if (methodName.IsEmpty())
      methodName = k_LZMA2_Name;
    else if (!methodName.IsEqualTo_Ascii_NoCase(k_LZMA2_Name))
      return E_INVALIDARG;
  }
  
  return S_OK;

  COM_TRY_END
}

#endif

REGISTER_ARC_IO(
  "xz", "xz txz", "* .tar", 0xC,
  XZ_SIG,
  0,
  NArcInfoFlags::kKeepName,
  NULL)

}}
