Import Upstream version 2.0.0+dfsgupstream/2.0.0+dfsg

1 files changed, 79 insertions, 0 deletions

diff --git a/src/lib/io/StreamBuffer.h b/src/lib/io/StreamBuffer.h
new file mode 100644
index 0000000..49b666b
--- /dev/null
+++ b/src/lib/io/StreamBuffer.h
@@ -0,0 +1,79 @@
+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "base/EventTypes.h"
+#include "common/stdlist.h"
+#include "common/stdvector.h"
+
+//! FIFO of bytes
+/*!
+This class maintains a FIFO (first-in, last-out) buffer of bytes.
+*/
+class StreamBuffer {
+public:
+    StreamBuffer();
+    ~StreamBuffer();
+
+    //! @name manipulators
+    //@{
+
+    //! Read data without removing from buffer
+    /*!
+    Return a pointer to memory with the next \c n bytes in the buffer
+    (which must be <= getSize()).  The caller must not modify the returned
+    memory nor delete it.
+    */
+    const void*            peek(UInt32 n);
+
+    //! Discard data
+    /*!
+    Discards the next \c n bytes.  If \c n >= getSize() then the buffer
+    is cleared.
+    */
+    void                pop(UInt32 n);
+
+    //! Write data to buffer
+    /*!
+    Appends \c n bytes from \c data to the buffer.
+    */
+    void                write(const void* data, UInt32 n);
+
+    //@}
+    //! @name accessors
+    //@{
+
+    //! Get size of buffer
+    /*!
+    Returns the number of bytes in the buffer.
+    */
+    UInt32                getSize() const;
+
+    //@}
+
+private:
+    static const UInt32    kChunkSize;
+
+    typedef std::vector<UInt8> Chunk;
+    typedef std::list<Chunk> ChunkList;
+
+    ChunkList            m_chunks;
+    UInt32                m_size;
+    UInt32                m_headUsed;
+};