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| author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-29 16:04:01 +0100 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-29 16:04:01 +0100 |
| commit | 88083f8c683c18f4de68a20c863a82a9da65db8f (patch) | |
| tree | 926656892d9d80260da02ea8ea71031b140c51df /other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp | |
| parent | f999f544aad04069b03704d994a99352263f600b (diff) | |
| parent | 843e4ceffd6ce21a6e6db37419335eafdc543e18 (diff) | |
| download | UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.gz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.lz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.xz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.zip | |
Merge branch 'master' into Sync-weave
Diffstat (limited to 'other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp')
| -rw-r--r-- | other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp b/other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp new file mode 100644 index 000000000..ee103afe7 --- /dev/null +++ b/other-licenses/7zstub/src/CPP/7zip/Compress/ByteSwap.cpp @@ -0,0 +1,92 @@ +// ByteSwap.cpp
+
+#include "StdAfx.h"
+
+#include "../../Common/MyCom.h"
+
+#include "../ICoder.h"
+
+#include "../Common/RegisterCodec.h"
+
+namespace NCompress {
+namespace NByteSwap {
+
+class CByteSwap2:
+ public ICompressFilter,
+ public CMyUnknownImp
+{
+public:
+ MY_UNKNOWN_IMP1(ICompressFilter);
+ INTERFACE_ICompressFilter(;)
+};
+
+class CByteSwap4:
+ public ICompressFilter,
+ public CMyUnknownImp
+{
+public:
+ MY_UNKNOWN_IMP1(ICompressFilter);
+ INTERFACE_ICompressFilter(;)
+};
+
+STDMETHODIMP CByteSwap2::Init() { return S_OK; }
+
+STDMETHODIMP_(UInt32) CByteSwap2::Filter(Byte *data, UInt32 size)
+{
+ const UInt32 kStep = 2;
+ if (size < kStep)
+ return 0;
+ size &= ~(kStep - 1);
+
+ const Byte *end = data + (size_t)size;
+
+ do
+ {
+ Byte b0 = data[0];
+ data[0] = data[1];
+ data[1] = b0;
+ data += kStep;
+ }
+ while (data != end);
+
+ return size;
+}
+
+STDMETHODIMP CByteSwap4::Init() { return S_OK; }
+
+STDMETHODIMP_(UInt32) CByteSwap4::Filter(Byte *data, UInt32 size)
+{
+ const UInt32 kStep = 4;
+ if (size < kStep)
+ return 0;
+ size &= ~(kStep - 1);
+
+ const Byte *end = data + (size_t)size;
+
+ do
+ {
+ Byte b0 = data[0];
+ Byte b1 = data[1];
+ data[0] = data[3];
+ data[1] = data[2];
+ data[2] = b1;
+ data[3] = b0;
+ data += kStep;
+ }
+ while (data != end);
+
+ return size;
+}
+
+REGISTER_FILTER_CREATE(CreateFilter2, CByteSwap2())
+REGISTER_FILTER_CREATE(CreateFilter4, CByteSwap4())
+
+REGISTER_CODECS_VAR
+{
+ REGISTER_FILTER_ITEM(CreateFilter2, CreateFilter2, 0x20302, "Swap2"),
+ REGISTER_FILTER_ITEM(CreateFilter4, CreateFilter4, 0x20304, "Swap4")
+};
+
+REGISTER_CODECS(ByteSwap)
+
+}}
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