1 files changed, 56 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/Common/StreamUtils.cpp b/other-licenses/7zstub/src/CPP/7zip/Common/StreamUtils.cpp
new file mode 100644
index 000000000..a79de2352
--- /dev/null
+++ b/other-licenses/7zstub/src/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) throw()
+{
+  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) throw()
+{
+  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) throw()
+{
+  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) throw()
+{
+  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;
+}