Package com.itextpdf.barcodes.qrcode

Class BitVector

  • final class BitVector
extends java.lang.Object
    JAVAPORT: This should be combined with BitArray in the future, although that class is not yet dynamically resizeable. This implementation is reasonable but there is a lot of function calling in loops I'd like to get rid of.

    • Constructor Summary

      Constructors 
      Constructor Description
      BitVector()
      Create a bitvector usng the default size

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void appendBit​(int bit)
      Append the a bit to the bit vector
      void appendBits​(int value, int numBits)
      Append "numBits" bits in "value" to the bit vector.
      void appendBitVector​(BitVector bits)
      Append a different BitVector to this BitVector
      private void appendByte​(int value)
      Add a new byte to the end, possibly reallocating and doubling the size of the array if we've run out of room.
      int at​(int index)
      Return the bit value at "index".
      byte[] getArray()
      Callers should not assume that array.length is the exact number of bytes needed to hold sizeInBits - it will typically be larger for efficiency.
      int size()  
      int sizeInBytes()  
      java.lang.String toString()  
      void xor​(BitVector other)
      XOR the contents of this bitvector with the contetns of "other"

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • sizeInBits

        private int sizeInBits

      • array

        private byte[] array

    • Constructor Detail

      • BitVector

        public BitVector()
        Create a bitvector usng the default size

    • Method Detail

      • at

        public int at​(int index)
        Return the bit value at "index".
        Parameters:
        index - index in the vector
        Returns:
        bit value at "index"

      • size

        public int size()
        Returns:
        the number of bits in the bit vector.

      • sizeInBytes

        public int sizeInBytes()
        Returns:
        the number of bytes in the bit vector.

      • appendBit

        public void appendBit​(int bit)
        Append the a bit to the bit vector
        Parameters:
        bit - 0 or 1

      • appendBits

        public void appendBits​(int value,
                       int numBits)
        Append "numBits" bits in "value" to the bit vector. Examples: - appendBits(0x00, 1) adds 0. - appendBits(0x00, 4) adds 0000. - appendBits(0xff, 8) adds 11111111.
        Parameters:
        value - int interpreted as bitvector
        numBits - 0 <= numBits <= 32.

      • appendBitVector

        public void appendBitVector​(BitVector bits)
        Append a different BitVector to this BitVector
        Parameters:
        bits - BitVector to append

      • xor

        public void xor​(BitVector other)
        XOR the contents of this bitvector with the contetns of "other"
        Parameters:
        other - Bitvector of equal length

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
        Returns:
        String representation of the bitvector

      • getArray

        public byte[] getArray()
        Callers should not assume that array.length is the exact number of bytes needed to hold sizeInBits - it will typically be larger for efficiency.
        Returns:
        size of the array containing the bitvector

      • appendByte

        private void appendByte​(int value)
        Add a new byte to the end, possibly reallocating and doubling the size of the array if we've run out of room.
        Parameters:
        value - byte to add.