1 files changed, 131 insertions, 0 deletions
diff --git a/CPP/7zip/Compress/BZip2Original/BZip2Decoder.cpp b/CPP/7zip/Compress/BZip2Original/BZip2Decoder.cpp
new file mode 100755
index 00000000..5fb77d01
--- /dev/null
+++ b/CPP/7zip/Compress/BZip2Original/BZip2Decoder.cpp
@@ -0,0 +1,131 @@
+// BZip2Decoder.cpp
+
+#include "StdAfx.h"
+
+#include "BZip2Decoder.h"
+
+#include "../../../Common/Alloc.h"
+#include "Original/bzlib.h"
+
+namespace NCompress {
+namespace NBZip2 {
+
+static const UInt32 kBufferSize = (1 << 20);
+
+CDecoder::~CDecoder()
+{
+  BigFree(m_InBuffer);
+}
+
+struct CBZip2Decompressor: public bz_stream
+{
+  int Init(int verbosity, int small) { return BZ2_bzDecompressInit(this, verbosity, small); }
+  int Decompress()  { return BZ2_bzDecompress(this); }
+  int End()  { return BZ2_bzDecompressEnd(this); }
+  UInt64 GetTotalIn() const { return (UInt64(total_in_hi32) << 32) +  total_in_lo32; }
+  UInt64 GetTotalOut() const { return (UInt64(total_out_hi32) << 32) +  total_out_lo32; }
+};
+
+class CBZip2DecompressorReleaser
+{
+  CBZip2Decompressor *m_Decompressor;
+public:
+  CBZip2DecompressorReleaser(CBZip2Decompressor *decompressor): m_Decompressor(decompressor) {}
+  void Diable() { m_Decompressor = NULL; }
+  ~CBZip2DecompressorReleaser()  { if (m_Decompressor != NULL) m_Decompressor->End(); }
+};
+
+STDMETHODIMP CDecoder::CodeReal(ISequentialInStream *inStream,
+    ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
+    ICompressProgressInfo *progress)
+{
+  m_InSize = 0;
+  if (m_InBuffer == 0)
+  {
+    m_InBuffer = (Byte *)BigAlloc(kBufferSize * 2);
+    if (m_InBuffer == 0)
+      return E_OUTOFMEMORY;
+  }
+  Byte *outBuffer = m_InBuffer + kBufferSize;
+
+  CBZip2Decompressor bzStream;
+  bzStream.bzalloc = NULL;
+  bzStream.bzfree = NULL;
+  bzStream.opaque = NULL;
+
+  int result = bzStream.Init(0, 0);
+  switch(result)
+  {
+    case BZ_OK:
+      break;
+    case BZ_MEM_ERROR:
+      return E_OUTOFMEMORY;
+    default:
+      return E_FAIL;
+  }
+  CBZip2DecompressorReleaser releaser(&bzStream);
+  bzStream.avail_in = 0;
+  for (;;)
+  {
+    if (bzStream.avail_in == 0)
+    {
+      bzStream.next_in = (char *)m_InBuffer;
+      UInt32 processedSize;
+      RINOK(inStream->Read(m_InBuffer, kBufferSize, &processedSize));
+      bzStream.avail_in = processedSize;
+    }
+
+    bzStream.next_out = (char *)outBuffer;
+    bzStream.avail_out = kBufferSize;
+    result = bzStream.Decompress();
+    UInt32 numBytesToWrite = kBufferSize - bzStream.avail_out;
+    if (numBytesToWrite > 0)
+    {
+      UInt32 processedSize;
+      RINOK(outStream->Write(outBuffer, numBytesToWrite, &processedSize));
+      if (numBytesToWrite != processedSize)
+        return E_FAIL;
+    }
+
+    if (result == BZ_STREAM_END)
+      break;
+    switch(result)
+    {
+      case BZ_DATA_ERROR:
+      case BZ_DATA_ERROR_MAGIC:
+        return S_FALSE;
+      case BZ_OK:
+        break;
+      case BZ_MEM_ERROR:
+        return E_OUTOFMEMORY;
+      default:
+        return E_FAIL;
+    }
+    if (progress != NULL)
+    {
+      UInt64 totalIn = bzStream.GetTotalIn();
+      UInt64 totalOut = bzStream.GetTotalOut();
+      RINOK(progress->SetRatioInfo(&totalIn, &totalOut));
+    }
+  }
+  m_InSize = bzStream.GetTotalIn();
+  return S_OK;
+}
+
+STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
+    ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
+    ICompressProgressInfo *progress)
+{
+  try { return CodeReal(inStream, outStream, inSize, outSize, progress); }
+  catch(...) { return S_FALSE; }
+}
+
+STDMETHODIMP CDecoder::GetInStreamProcessedSize(UInt64 *value)
+{
+  if (value == NULL)
+    return E_INVALIDARG;
+  *value = m_InSize;
+  return S_OK;
+}
+
+}}