chore: initial commit (extracted from Launchers monorepo)

Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
2026-04-29 14:07:51 +02:00
commit d074cc7c07
3848 changed files with 1076682 additions and 0 deletions
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+// ZlibDecoder.h
+
+#ifndef ZIP7_INC_ZLIB_DECODER_H
+#define ZIP7_INC_ZLIB_DECODER_H
+
+#include "DeflateDecoder.h"
+
+namespace NCompress {
+namespace NZlib {
+
+const UInt32 ADLER_INIT_VAL = 1;
+
+Z7_CLASS_IMP_NOQIB_1(
+  COutStreamWithAdler
+  , ISequentialOutStream
+)
+  UInt32 _adler;
+  CMyComPtr<ISequentialOutStream> _stream;
+  UInt64 _size;
+public:
+  void SetStream(ISequentialOutStream *stream) { _stream = stream; }
+  void ReleaseStream() { _stream.Release(); }
+  void Init() { _adler = ADLER_INIT_VAL; _size = 0; }
+  UInt32 GetAdler() const { return _adler; }
+  UInt64 GetSize() const { return _size; }
+};
+
+Z7_CLASS_IMP_NOQIB_1(
+  CDecoder
+  , ICompressCoder
+)
+  CMyComPtr2<ISequentialOutStream, COutStreamWithAdler> AdlerStream;
+  CMyComPtr2<ICompressCoder, NDeflate::NDecoder::CCOMCoder> DeflateDecoder;
+  Int32 _inputProcessedSize_Additional;
+public:
+  bool IsAdlerOptional;
+  
+  CDecoder(): IsAdlerOptional(false) {}
+  UInt64 GetInputProcessedSize() const
+  {
+    return (UInt64)(
+      (Int64)DeflateDecoder->GetInputProcessedSize() +
+      (Int64)_inputProcessedSize_Additional);
+  }
+  UInt64 GetOutputProcessedSize() const { return AdlerStream->GetSize(); }
+};
+
+static bool inline IsZlib(const Byte *p)
+{
+  if ((p[0] & 0xF) != 8) // method
+    return false;
+  if (((unsigned)p[0] >> 4) > 7) // logar_window_size minus 8.
+    return false;
+  if ((p[1] & 0x20) != 0) // dictPresent
+    return false;
+  if ((((UInt32)p[0] << 8) + p[1]) % 31 != 0)
+    return false;
+  return true;
+}
+
+// IsZlib_3bytes checks 2 bytes of zlib header and starting byte of Deflate stream
+
+static bool inline IsZlib_3bytes(const Byte *p)
+{
+  if (!IsZlib(p))
+    return false;
+  const unsigned val = p[2];
+  const unsigned blockType = (val >> 1) & 0x3;
+  if (blockType == 3) // unsupported block type for deflate
+    return false;
+  if (blockType == NCompress::NDeflate::NBlockType::kStored && (val >> 3) != 0)
+    return false;
+  return true;
+}
+
+}}
+
+#endif