summaryrefslogtreecommitdiffstats
path: root/src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp')
-rw-r--r--src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp89
1 files changed, 0 insertions, 89 deletions
diff --git a/src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp b/src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp
deleted file mode 100644
index 90d6715db..000000000
--- a/src/libs/7zip/unix/CPP/7zip/Compress/ZlibDecoder.cpp
+++ /dev/null
@@ -1,89 +0,0 @@
-// ZlibDecoder.cpp
-
-#include "StdAfx.h"
-
-#include "../Common/StreamUtils.h"
-
-#include "ZlibDecoder.h"
-
-namespace NCompress {
-namespace NZlib {
-
-#define DEFLATE_TRY_BEGIN try {
-#define DEFLATE_TRY_END } catch(...) { return S_FALSE; }
-
-#define ADLER_MOD 65521
-#define ADLER_LOOP_MAX 5550
-
-UInt32 Adler32_Update(UInt32 adler, const Byte *buf, size_t size)
-{
- UInt32 a = adler & 0xFFFF;
- UInt32 b = (adler >> 16) & 0xFFFF;
- while (size > 0)
- {
- unsigned curSize = (size > ADLER_LOOP_MAX) ? ADLER_LOOP_MAX : (unsigned )size;
- unsigned i;
- for (i = 0; i < curSize; i++)
- {
- a += buf[i];
- b += a;
- }
- buf += curSize;
- size -= curSize;
- a %= ADLER_MOD;
- b %= ADLER_MOD;
- }
- return (b << 16) + a;
-}
-
-STDMETHODIMP COutStreamWithAdler::Write(const void *data, UInt32 size, UInt32 *processedSize)
-{
- HRESULT result = _stream->Write(data, size, &size);
- _adler = Adler32_Update(_adler, (const Byte *)data, size);
- if (processedSize != NULL)
- *processedSize = size;
- return result;
-}
-
-STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
- const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress)
-{
- DEFLATE_TRY_BEGIN
- if (!AdlerStream)
- AdlerStream = AdlerSpec = new COutStreamWithAdler;
- if (!DeflateDecoder)
- {
- DeflateDecoderSpec = new NDeflate::NDecoder::CCOMCoder;
- DeflateDecoderSpec->ZlibMode = true;
- DeflateDecoder = DeflateDecoderSpec;
- }
-
- Byte buf[2];
- RINOK(ReadStream_FALSE(inStream, buf, 2));
- int method = buf[0] & 0xF;
- if (method != 8)
- return S_FALSE;
- // int dicSize = buf[0] >> 4;
- if ((((UInt32)buf[0] << 8) + buf[1]) % 31 != 0)
- return S_FALSE;
- if ((buf[1] & 0x20) != 0) // dictPresent
- return S_FALSE;
- // int level = (buf[1] >> 6);
-
- AdlerSpec->SetStream(outStream);
- AdlerSpec->Init();
- HRESULT res = DeflateDecoder->Code(inStream, AdlerStream, inSize, outSize, progress);
- AdlerSpec->ReleaseStream();
-
- if (res == S_OK)
- {
- const Byte *p = DeflateDecoderSpec->ZlibFooter;
- UInt32 adler = ((UInt32)p[0] << 24) | ((UInt32)p[1] << 16) | ((UInt32)p[2] << 8) | p[3];
- if (adler != AdlerSpec->GetAdler())
- return S_FALSE;
- }
- return res;
- DEFLATE_TRY_END
-}
-
-}}