GEOS  3.6.2
ByteOrderDataInStream.h
00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2005-2006 Refractions Research Inc.
00007  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************
00015  *
00016  * Last port: io/ByteOrderDataInStream.java rev. 1.1 (JTS-1.10)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_IO_BYTEORDERDATAINSTREAM_H
00021 #define GEOS_IO_BYTEORDERDATAINSTREAM_H
00022 
00023 #include <geos/export.h>
00024 
00025 //#include <geos/platform.h>
00026 //#include <geos/io/ParseException.h>
00027 //#include <geos/io/ByteOrderValues.h>
00028 #include <geos/inline.h>
00029 
00030 #include <iosfwd> // ostream, istream (if we remove inlines)
00031 
00032 namespace geos {
00033 namespace io {
00034 
00035 /*
00036  * \class ByteOrderDataInStream io.h geos.h
00037  * 
00038  * Allows reading an stream of primitive datatypes from an underlying
00039  * istream, with the representation being in either common byte ordering.
00040  *
00041  */
00042 class GEOS_DLL ByteOrderDataInStream {
00043 
00044 public:
00045 
00046         ByteOrderDataInStream(std::istream *s=NULL);
00047 
00048         ~ByteOrderDataInStream();
00049 
00054         void setInStream(std::istream *s);
00055 
00056         void setOrder(int order);
00057 
00058         unsigned char readByte(); // throws ParseException
00059 
00060         int readInt(); // throws ParseException
00061 
00062         long readLong(); // throws ParseException
00063 
00064         double readDouble(); // throws ParseException
00065 
00066 private:
00067         int byteOrder;
00068         std::istream *stream;
00069 
00070         // buffers to hold primitive datatypes
00071         unsigned char buf[8];
00072 
00073 };
00074 
00075 } // namespace io
00076 } // namespace geos
00077 
00078 #ifdef GEOS_INLINE
00079 #include <geos/io/ByteOrderDataInStream.inl>
00080 #endif
00081 
00082 #endif // #ifndef GEOS_IO_BYTEORDERDATAINSTREAM_H