1 files changed, 96 insertions, 0 deletions
diff --git a/indra/llmessage/lliobuffer.cpp b/indra/llmessage/lliobuffer.cpp
new file mode 100644
index 0000000000..f5d1ebd595
--- /dev/null
+++ b/indra/llmessage/lliobuffer.cpp
@@ -0,0 +1,96 @@
+/** 
+ * @file lliobuffer.cpp
+ * @author Phoenix
+ * @date 2005-05-04
+ * @brief Definition of buffer based implementations of IO Pipes.
+ *
+ * Copyright (c) 2005-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#include "linden_common.h"
+#include "lliobuffer.h"
+
+//
+// LLIOBuffer
+//
+LLIOBuffer::LLIOBuffer() :
+	mBuffer(NULL),
+	mBufferSize(0L),
+	mReadHead(NULL),
+	mWriteHead(NULL)
+{
+}
+
+LLIOBuffer::~LLIOBuffer()
+{
+	if(mBuffer)
+	{
+		delete[] mBuffer;
+	}
+}
+
+U8* LLIOBuffer::data() const
+{
+	return mBuffer;
+}
+
+S64 LLIOBuffer::size() const
+{
+	return mBufferSize;
+}
+
+U8* LLIOBuffer::current() const
+{
+	return mReadHead;
+}
+
+S64 LLIOBuffer::bytesLeft() const
+{
+	return mWriteHead - mReadHead;
+}
+
+void LLIOBuffer::clear()
+{
+	mReadHead = mBuffer;
+	mWriteHead = mBuffer;
+}
+
+LLIOPipe::EStatus LLIOBuffer::seek(LLIOBuffer::EHead head, S64 delta)
+{
+	LLIOPipe::EStatus status = STATUS_ERROR;
+	switch(head)
+	{
+	case READ:
+		if(((delta >= 0) && ((mReadHead + delta) <= mWriteHead))
+		   || (delta < 0) && ((mReadHead + delta) >= mBuffer))
+		{
+			mReadHead += delta;
+			status = STATUS_OK;
+		}
+		break;
+	case WRITE:
+		if(((delta >= 0) && ((mWriteHead + delta) < (mBuffer + mBufferSize)))
+		   || (delta < 0) && ((mWriteHead + delta) > mReadHead))
+		{
+			mWriteHead += delta;
+			status = STATUS_OK;
+		}
+	default:
+		break;
+	}
+	return status;
+}
+
+// virtual
+LLIOPipe::EStatus LLIOBuffer::process_impl(
+	const LLChannelDescriptors& channels,
+	buffer_ptr_t& buffer,
+	bool& eos,
+	LLSD& context,
+	LLPumpIO* pump)
+{
+	// no-op (I think)
+	llwarns << "You are using an LLIOBuffer which is deprecated." << llendl;
+	return STATUS_OK;
+}