142 lines
2.7 KiB
C++
142 lines
2.7 KiB
C++
/*
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* Modification History
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*
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* 2006-November-21 Jason Rohrer
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* Created. Copied from LittleEndian version.
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*/
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#ifndef BIG_ENDIAN_IMAGE_CONVERTER_INCLUDED
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#define BIG_ENDIAN_IMAGE_CONVERTER_INCLUDED
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#include "minorGems/graphics/ImageConverter.h"
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/**
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* A base class for converters that have big endian file formats.
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* Basically includes big endian reading and writing functions.
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*
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* @author Jason Rohrer
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*/
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class BigEndianImageConverter : public ImageConverter {
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public:
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// does not implement the ImageConverter interface,
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// which makes this class abstract.
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protected:
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/**
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* Writes a long value in big endian format.
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*
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* @param inLong the long value to write.
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* @param inStream the stream to write inLong to.
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*/
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void writeBigEndianLong( long inLong,
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OutputStream *inStream );
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/**
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* Writes a short value in big endian format.
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*
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* @param inShort the short value to write.
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* @param inStream the stream to write inShort to.
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*/
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void writeBigEndianShort( short inShort,
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OutputStream *inStream );
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/**
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* Reads a long value in big endian format.
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*
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* @param inStream the stream to read the long value from.
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*
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* @return the long value.
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*/
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long readBigEndianLong( InputStream *inStream );
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/**
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* Reads a short value in big endian format.
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*
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* @param inStream the stream to read the short value from.
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*
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* @return the short value.
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*/
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short readBigEndianShort( InputStream *inStream );
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};
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inline void BigEndianImageConverter::writeBigEndianLong( long inLong,
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OutputStream *inStream ) {
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unsigned char buffer[4];
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buffer[0] = (unsigned char)( ( inLong >> 24 ) & 0xFF );
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buffer[1] = (unsigned char)( ( inLong >> 16 ) & 0xFF );
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buffer[2] = (unsigned char)( ( inLong >> 8 ) & 0xFF );
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buffer[3] = (unsigned char)( inLong & 0xFF );
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inStream->write( buffer, 4 );
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}
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inline long BigEndianImageConverter::readBigEndianLong(
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InputStream *inStream ) {
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unsigned char buffer[4];
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inStream->read( buffer, 4 );
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long outLong =
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( buffer[0] << 24 ) |
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( buffer[1] << 16 ) |
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( buffer[2] << 8 ) |
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buffer[3];
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return outLong;
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}
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inline void BigEndianImageConverter::writeBigEndianShort( short inShort,
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OutputStream *inStream ) {
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unsigned char buffer[2];
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buffer[0] = (unsigned char)( ( inShort >> 8 ) & 0xFF );
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buffer[1] = (unsigned char)( inShort & 0xFF );
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inStream->write( buffer, 2 );
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}
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inline short BigEndianImageConverter::readBigEndianShort(
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InputStream *inStream ) {
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unsigned char buffer[2];
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inStream->read( buffer, 2 );
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long outShort =
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( buffer[0] << 8 ) |
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buffer[1];
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return outShort;
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}
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#endif
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