diff --git a/Base/CMakeLists.txt b/Base/CMakeLists.txt index ebdb4c3..a9d7629 100644 --- a/Base/CMakeLists.txt +++ b/Base/CMakeLists.txt @@ -80,6 +80,7 @@ SET( SOURCES ) SET( HEADERS + "include/Bits.h" "include/BitStream.h" "include/Color.h" "include/CompressionJob.h" diff --git a/Base/include/Bits.h b/Base/include/Bits.h new file mode 100644 index 0000000..bb42996 --- /dev/null +++ b/Base/include/Bits.h @@ -0,0 +1,92 @@ +/* FasTC + * Copyright (c) 2014 University of North Carolina at Chapel Hill. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for educational, research, and non-profit purposes, without + * fee, and without a written agreement is hereby granted, provided that the + * above copyright notice, this paragraph, and the following four paragraphs + * appear in all copies. + * + * Permission to incorporate this software into commercial products may be + * obtained by contacting the authors or the Office of Technology Development + * at the University of North Carolina at Chapel Hill . + * + * This software program and documentation are copyrighted by the University of + * North Carolina at Chapel Hill. The software program and documentation are + * supplied "as is," without any accompanying services from the University of + * North Carolina at Chapel Hill or the authors. The University of North + * Carolina at Chapel Hill and the authors do not warrant that the operation of + * the program will be uninterrupted or error-free. The end-user understands + * that the program was developed for research purposes and is advised not to + * rely exclusively on the program for any reason. + * + * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE + * AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, + * OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF + * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA + * AT CHAPEL HILL OR THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY + * DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY + * STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON + * AN "AS IS" BASIS, AND THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND + * THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, + * ENHANCEMENTS, OR MODIFICATIONS. + * + * Please send all BUG REPORTS to . + * + * The authors may be contacted via: + * + * Pavel Krajcevski + * Dept of Computer Science + * 201 S Columbia St + * Frederick P. Brooks, Jr. Computer Science Bldg + * Chapel Hill, NC 27599-3175 + * USA + * + * + */ + +#ifndef __BASE_INCLUDE_BITS_H__ +#define __BASE_INCLUDE_BITS_H__ + +#include "TexCompTypes.h" + +namespace FasTC { + + template + class Bits { + private: + const IntType &m_Bits; + + // Don't copy + Bits() { } + Bits(const Bits &) { } + Bits &operator=(const Bits &) { } + + public: + explicit Bits(IntType &v) : m_Bits(v) { } + + bool operator[](uint32 bitPos) { + return (m_Bits >> bitPos) & 1; + } + + IntType operator()(uint32 start, uint32 end) { + if(start == end) { + return (*this)[start]; + } else if(start > end) { + uint32 t = start; + start = end; + end = t; + } + + uint64 mask = (1 << (end - start + 1)) - 1; + return (m_Bits >> start) & mask; + } + }; + +} // namespace FasTC +#endif // __BASE_INCLUDE_BITS_H__