1 files changed, 170 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/Compress/PpmdDecoder.cpp b/other-licenses/7zstub/src/CPP/7zip/Compress/PpmdDecoder.cpp
new file mode 100644
index 0000000000..4820c0a7c0
--- /dev/null
+++ b/other-licenses/7zstub/src/CPP/7zip/Compress/PpmdDecoder.cpp
@@ -0,0 +1,170 @@
+// PpmdDecoder.cpp
+// 2009-03-11 : Igor Pavlov : Public domain
+
+#include "StdAfx.h"
+
+#include "../../../C/Alloc.h"
+#include "../../../C/CpuArch.h"
+
+#include "../Common/StreamUtils.h"
+
+#include "PpmdDecoder.h"
+
+namespace NCompress {
+namespace NPpmd {
+
+static const UInt32 kBufSize = (1 << 20);
+
+enum
+{
+  kStatus_NeedInit,
+  kStatus_Normal,
+  kStatus_Finished,
+  kStatus_Error
+};
+
+CDecoder::~CDecoder()
+{
+  ::MidFree(_outBuf);
+  Ppmd7_Free(&_ppmd, &g_BigAlloc);
+}
+
+STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *props, UInt32 size)
+{
+  if (size < 5)
+    return E_INVALIDARG;
+  _order = props[0];
+  UInt32 memSize = GetUi32(props + 1);
+  if (_order < PPMD7_MIN_ORDER ||
+      _order > PPMD7_MAX_ORDER ||
+      memSize < PPMD7_MIN_MEM_SIZE ||
+      memSize > PPMD7_MAX_MEM_SIZE)
+    return E_NOTIMPL;
+  if (!_inStream.Alloc(1 << 20))
+    return E_OUTOFMEMORY;
+  if (!Ppmd7_Alloc(&_ppmd, memSize, &g_BigAlloc))
+    return E_OUTOFMEMORY;
+  return S_OK;
+}
+
+HRESULT CDecoder::CodeSpec(Byte *memStream, UInt32 size)
+{
+  switch (_status)
+  {
+    case kStatus_Finished: return S_OK;
+    case kStatus_Error: return S_FALSE;
+    case kStatus_NeedInit:
+      _inStream.Init();
+      if (!Ppmd7z_RangeDec_Init(&_rangeDec))
+      {
+        _status = kStatus_Error;
+        return S_FALSE;
+      }
+      _status = kStatus_Normal;
+      Ppmd7_Init(&_ppmd, _order);
+      break;
+  }
+  if (_outSizeDefined)
+  {
+    const UInt64 rem = _outSize - _processedSize;
+    if (size > rem)
+      size = (UInt32)rem;
+  }
+
+  UInt32 i;
+  int sym = 0;
+  for (i = 0; i != size; i++)
+  {
+    sym = Ppmd7_DecodeSymbol(&_ppmd, &_rangeDec.vt);
+    if (_inStream.Extra || sym < 0)
+      break;
+    memStream[i] = (Byte)sym;
+  }
+
+  _processedSize += i;
+  if (_inStream.Extra)
+  {
+    _status = kStatus_Error;
+    return _inStream.Res;
+  }
+  if (sym < 0)
+    _status = (sym < -1) ? kStatus_Error : kStatus_Finished;
+  return S_OK;
+}
+
+STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+    const UInt64 * /* inSize */, const UInt64 *outSize, ICompressProgressInfo *progress)
+{
+  if (!_outBuf)
+  {
+    _outBuf = (Byte *)::MidAlloc(kBufSize);
+    if (!_outBuf)
+      return E_OUTOFMEMORY;
+  }
+  
+  _inStream.Stream = inStream;
+  SetOutStreamSize(outSize);
+
+  do
+  {
+    const UInt64 startPos = _processedSize;
+    HRESULT res = CodeSpec(_outBuf, kBufSize);
+    size_t processed = (size_t)(_processedSize - startPos);
+    RINOK(WriteStream(outStream, _outBuf, processed));
+    RINOK(res);
+    if (_status == kStatus_Finished)
+      break;
+    if (progress)
+    {
+      UInt64 inSize = _inStream.GetProcessed();
+      RINOK(progress->SetRatioInfo(&inSize, &_processedSize));
+    }
+  }
+  while (!_outSizeDefined || _processedSize < _outSize);
+  return S_OK;
+}
+
+STDMETHODIMP CDecoder::SetOutStreamSize(const UInt64 *outSize)
+{
+  _outSizeDefined = (outSize != NULL);
+  if (_outSizeDefined)
+    _outSize = *outSize;
+  _processedSize = 0;
+  _status = kStatus_NeedInit;
+  return S_OK;
+}
+
+
+STDMETHODIMP CDecoder::GetInStreamProcessedSize(UInt64 *value)
+{
+  *value = _inStream.GetProcessed();
+  return S_OK;
+}
+
+#ifndef NO_READ_FROM_CODER
+
+STDMETHODIMP CDecoder::SetInStream(ISequentialInStream *inStream)
+{
+  InSeqStream = inStream;
+  _inStream.Stream = inStream;
+  return S_OK;
+}
+
+STDMETHODIMP CDecoder::ReleaseInStream()
+{
+  InSeqStream.Release();
+  return S_OK;
+}
+
+STDMETHODIMP CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize)
+{
+  const UInt64 startPos = _processedSize;
+  HRESULT res = CodeSpec((Byte *)data, size);
+  if (processedSize)
+    *processedSize = (UInt32)(_processedSize - startPos);
+  return res;
+}
+
+#endif
+
+}}