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-rwxr-xr-xCPP/7zip/Common/StreamUtils.cpp56
1 files changed, 56 insertions, 0 deletions
diff --git a/CPP/7zip/Common/StreamUtils.cpp b/CPP/7zip/Common/StreamUtils.cpp
new file mode 100755
index 0000000..57ff4ee
--- /dev/null
+++ b/CPP/7zip/Common/StreamUtils.cpp
@@ -0,0 +1,56 @@
+// StreamUtils.cpp
+
+#include "StdAfx.h"
+
+#include "StreamUtils.h"
+
+static const UInt32 kBlockSize = ((UInt32)1 << 31);
+
+HRESULT ReadStream(ISequentialInStream *stream, void *data, size_t *processedSize)
+{
+ size_t size = *processedSize;
+ *processedSize = 0;
+ while (size != 0)
+ {
+ UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize;
+ UInt32 processedSizeLoc;
+ HRESULT res = stream->Read(data, curSize, &processedSizeLoc);
+ *processedSize += processedSizeLoc;
+ data = (void *)((Byte *)data + processedSizeLoc);
+ size -= processedSizeLoc;
+ RINOK(res);
+ if (processedSizeLoc == 0)
+ return S_OK;
+ }
+ return S_OK;
+}
+
+HRESULT ReadStream_FALSE(ISequentialInStream *stream, void *data, size_t size)
+{
+ size_t processedSize = size;
+ RINOK(ReadStream(stream, data, &processedSize));
+ return (size == processedSize) ? S_OK : S_FALSE;
+}
+
+HRESULT ReadStream_FAIL(ISequentialInStream *stream, void *data, size_t size)
+{
+ size_t processedSize = size;
+ RINOK(ReadStream(stream, data, &processedSize));
+ return (size == processedSize) ? S_OK : E_FAIL;
+}
+
+HRESULT WriteStream(ISequentialOutStream *stream, const void *data, size_t size)
+{
+ while (size != 0)
+ {
+ UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize;
+ UInt32 processedSizeLoc;
+ HRESULT res = stream->Write(data, curSize, &processedSizeLoc);
+ data = (const void *)((const Byte *)data + processedSizeLoc);
+ size -= processedSizeLoc;
+ RINOK(res);
+ if (processedSizeLoc == 0)
+ return E_FAIL;
+ }
+ return S_OK;
+}