From 3ede66098fc010499fe1d0d255d4c9767b4df62a Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Mon, 8 Jun 2015 22:09:09 +0200
Subject: [PATCH] added BitReader class

---
 io/bitreader.cpp | 37 +++++++++++++++++++++++++++++++++++++
 io/bitreader.h   | 15 +++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 io/bitreader.cpp
 create mode 100644 io/bitreader.h

diff --git a/io/bitreader.cpp b/io/bitreader.cpp
new file mode 100644
index 0000000..a5c9f2c
--- /dev/null
+++ b/io/bitreader.cpp
@@ -0,0 +1,37 @@
+#include "bitreader.h"
+
+using namespace std;
+
+namespace IoUtilities {
+
+/*!
+ * \class IoUtilities::BitReader
+ * \brief The BitReader class allows bitwise reading of buffered data.
+ */
+
+/*!
+ * \brief Skips the specified number of bits without reading it.
+ * \param Specifies the number of bits to skip.
+ * \throws Throws ios_base::failure if the end of the buffer is exceeded.
+ *         The reader becomes invalid in that case.
+ */
+void BitReader::skipBits(std::size_t bitCount)
+{
+    if(bitCount < m_bitsAvail) {
+        m_bitsAvail -= bitCount;
+        if(!m_bitsAvail) {
+            m_bitsAvail = 8;
+            if(++m_buffer >= m_end) {
+                throw ios_base::failure("end of buffer exceeded");
+            }
+        }
+    } else {
+        if((m_buffer += (bitCount -= m_bitsAvail) / 8) >= m_end) {
+            throw ios_base::failure("end of buffer exceeded");
+        }
+        m_bitsAvail = 8 - (bitCount % 8);
+    }
+}
+
+} // namespace IoUtilities
+
diff --git a/io/bitreader.h b/io/bitreader.h
new file mode 100644
index 0000000..fe42da3
--- /dev/null
+++ b/io/bitreader.h
@@ -0,0 +1,15 @@
+#ifndef IOUTILITIES_BITREADER_H
+#define IOUTILITIES_BITREADER_H
+
+
+namespace IoUtilities {
+
+class BitReader
+{
+public:
+    BitReader();
+};
+
+} // namespace IoUtilities
+
+#endif // IOUTILITIES_BITREADER_H