Examples of BitBuffer

com.slytechs.utils.memory.BitBuffer
s entire state of the buffer b.position(6); b.order(ByteOrder.BIG_ENDIAN); System.out .printf("Position=%d, order=%s\n", b.position(), b.order().toString()); @author Mark Bednarczyk @author Sly Technologies, Inc.
org.codehaus.preon.buffer.BitBuffer
The interface providing methods reading a given number of bits from the byte buffer and conveting them to the byte, short, int, long (all unsigned) and also to the boolean type values. It is possible to start reading from any location in the byte buffer by explicitly giving the bit position of the first bit to read. The API also supports reading values one by one by setting the position of the first bit to read to the internal bit pointer position. Both little and big endian reading formats are supported.
In case of byte base reading i.e. given bits fit completely all bits in bytes, the big endian and little endian implementations differ only in the reversed bytes order. Otherwise, the implementation is more complicated - in order to read the given bits, the buffering bytes containing these bits are stored in internal buffer. For the little endian implementation the offset to the closest given bit is calucated from the least significant bit in that internal buffer, but for the big endian from the most significant bit (e.g. for the byte: 11010011 and bit position = 1 and number of bits to read = 3, the given bits would be 101 for big endian and 001 for little endian, what gives the values 5 and 1 respectively. @author Wilfred Springer
org.tools.utils.BitBuffer
Circular (LIFO) bit buffer allowing reading and writing chunks up to 32 bits to and from the buffer at the same time. The buffer's length is not self-adjusting but the capacity can be changed during usage. However this will be costly because the buffer needs to be copied. Not thread safe! For usage in XML input/output the conversions to/from XML safe Strings are included. Comment: Bit operations on integers are also included in java.util.BitSet and java.lang.Integer but neither of them offers the abilities to store/read a couple of bits at the same time.

Examples of org.tools.utils.BitBuffer


        Node child = new Node("Maps");
        parent.appendChild(child);


        // terrain map
        BitBuffer terrainMapBuffer = new BitBuffer(BITSIZE_TERRAINID * rows * columns);
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                terrainMapBuffer.add(map[row][column].terrainID, BITSIZE_TERRAINID);
            }
        }
        Node schild = new Node("Terrains");
        schild.appendChild(terrainMapBuffer.toXMLString());
        child.appendChild(schild);


        // resources map
        BitBuffer resourcesMapBuffer = new BitBuffer((BITSIZE_RESOURCEID + 1) * rows * columns);
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                resourcesMapBuffer.add(map[row][column].resourceID, BITSIZE_RESOURCEID);
                resourcesMapBuffer.add(map[row][column].resourceVisible);
            }
        }
        schild = new Node("Resources");
        schild.appendChild(resourcesMapBuffer.toXMLString());
        child.appendChild(schild);


        // provinces
        BitBuffer provinceMapBuffer = new BitBuffer(BITSIZE_PROVINCEID * rows * columns);
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                provinceMapBuffer.add(map[row][column].provinceID, BITSIZE_PROVINCEID);
            }
        }
        schild = new Node("Provinces");
        schild.appendChild(provinceMapBuffer.toXMLString());
        child.appendChild(schild);


        // railroads
        BitBuffer railMapBuffer = new BitBuffer(BITSIZE_RAILROAD_CONFIG * rows * columns);
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                railMapBuffer.add(map[row][column].railroadConfig, BITSIZE_RAILROAD_CONFIG);
            }
        }
        schild = new Node("Railroads");
        schild.appendChild(railMapBuffer.toXMLString());
        child.appendChild(schild);


        // river overlay
        BitBuffer riverBuffer = new BitBuffer(BITSIZE_RIVERID * rows * columns);
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                riverBuffer.add(map[row][column].riverID, BITSIZE_RIVERID);
            }
        }
        schild = new Node("Rivers");
        schild.appendChild(riverBuffer.toXMLString());
        child.appendChild(schild);


        // nation list
        parent.appendChild(nations.toXML());

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Examples of org.tools.utils.BitBuffer


        Node child = parent.getFirstChild("Maps");


        // readingt of terrain map
        String content = child.getFirstChild("Terrains").getValue();
        BitBuffer terbuffer = BitBuffer.fromXMLString(content);
        terbuffer.trimTo(BITSIZE_TERRAINID * size);


        // readingt of terrain map
        content = child.getFirstChild("Resources").getValue();
        BitBuffer resbuffer = BitBuffer.fromXMLString(content);
        resbuffer.trimTo((BITSIZE_RESOURCEID + 1) * size);


        // reading of provinces map
        // TODO if no such element returns null and getValue will throw exception
        content = child.getFirstChild("Provinces").getValue();
        BitBuffer probuffer = BitBuffer.fromXMLString(content);
        probuffer.trimTo(BITSIZE_PROVINCEID * size);


        // reading of railroads map
        content = child.getFirstChild("Railroads").getValue();
        BitBuffer railbuffer = BitBuffer.fromXMLString(content);
        railbuffer.trimTo(BITSIZE_RAILROAD_CONFIG * size);


        // reading of rivers map
        content = child.getFirstChild("Rivers").getValue();
        BitBuffer riverbuffer = BitBuffer.fromXMLString(content);
        riverbuffer.trimTo(BITSIZE_RIVERID * size);


        // TODO test size of string with size
        // TODO more checks (positivity)
        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                Tile tile = new Tile();
                tile.terrainID = terbuffer.get(BITSIZE_TERRAINID);
                tile.resourceID = resbuffer.get(BITSIZE_RESOURCEID);
                tile.resourceVisible = resbuffer.get();
                tile.provinceID = probuffer.get(BITSIZE_PROVINCEID);
                tile.railroadConfig = railbuffer.get(BITSIZE_RAILROAD_CONFIG);
                tile.riverID = riverbuffer.get(BITSIZE_RIVERID);
                map[row][column] = tile;
            }
        }


        // just a test

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