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diff --git a/libSYS/include/conv_string.h b/libSYS/include/conv_string.h
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+/**************************  Fraunhofer IIS FDK SysLib  **********************
+
+                        (C) Copyright Fraunhofer IIS (2009)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+/** \file   conv_string.h
+ *  \brief  String conversion functions.
+ */
+
+#ifndef _CONV_STRING_H
+#define _CONV_STRING_H
+
+
+
+#include "genericStds.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * \brief                Convert a bitbuffer to a hex string.
+ * \param string         Hex string.
+ * \param charBuf        Input buffer that has to be converted.
+ * \param charBufLength  Size of the input buffer.
+ * \return               Error code.
+ */
+INT charBuf2HexString(char *string, UCHAR *charBuf, INT charBufLength);
+
+/**
+ * \brief                Convert a hex string to bits.
+ * \param string         Hex string that has to be converted.
+ * \param charBuf        Output buffer holding the bits, will be filled up with zeros.
+ * \param charBufLength  Size of the output buffer.
+ * \return               Error code.
+ */
+INT hexString2CharBuf(const char *string, UCHAR *charBuf, UINT charBufLength);
+
+/**
+ * \brief    Convert a character representing a hex sign to the appropriate value.
+ * \param c  Character that has to be converted.
+ * \return   Converted value (value between 0 and 15), if 16, an error has occured.
+ */
+UCHAR hexChar2Dec(const char c);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _CONV_STRING_H */