Package com.solab.iso8583.util

Class Bcd

  • public final class Bcd
extends java.lang.Object
    Routines for Binary Coded Digits.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.math.BigInteger decodeRightPaddedToBigInteger​(byte[] buf, int pos, int length)
      Decodes a right-padded BCD-encoded number as a BigInteger.
      static long decodeRightPaddedToLong​(byte[] buf, int pos, int length)  
      static java.math.BigInteger decodeToBigInteger​(byte[] buf, int pos, int length)
      Decodes a BCD-encoded number as a BigInteger.
      static long decodeToLong​(byte[] buf, int pos, int length)
      Decodes a BCD-encoded number as a long.
      static void encode​(java.lang.String value, byte[] buf)
      Encode the value as BCD and put it in the buffer.
      static void encodeRightPadded​(java.lang.String value, byte[] buf)
      Encode the value as BCD and put it in the buffer.
      static int parseBcdLength​(byte b)
      Convert two bytes of BCD length to an int, e.g.
      static int parseBcdLength2bytes​(byte[] b, int offset)
      Convert two bytes of BCD length to an int, e.g.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • decodeToLong

        public static long decodeToLong​(byte[] buf,
                                int pos,
                                int length)
                         throws java.lang.IndexOutOfBoundsException
        Decodes a BCD-encoded number as a long.
        Parameters:
        buf - The byte buffer containing the BCD data.
        pos - The starting position in the buffer.
        length - The number of DIGITS (not bytes) to read.
        Throws:
        java.lang.IndexOutOfBoundsException

      • decodeRightPaddedToLong

        public static long decodeRightPaddedToLong​(byte[] buf,
                                           int pos,
                                           int length)
                                    throws java.lang.IndexOutOfBoundsException
        Throws:
        java.lang.IndexOutOfBoundsException

      • encode

        public static void encode​(java.lang.String value,
                          byte[] buf)
        Encode the value as BCD and put it in the buffer. The buffer must be big enough to store the digits in the original value (half the length of the string).

      • encodeRightPadded

        public static void encodeRightPadded​(java.lang.String value,
                                     byte[] buf)
        Encode the value as BCD and put it in the buffer. The buffer must be big enough to store the digits in the original value (half the length of the string). If the value contains an odd number of digits, the last one is stored in its own byte at the end, padded with an F nibble.

      • decodeToBigInteger

        public static java.math.BigInteger decodeToBigInteger​(byte[] buf,
                                                      int pos,
                                                      int length)
                                               throws java.lang.IndexOutOfBoundsException
        Decodes a BCD-encoded number as a BigInteger.
        Parameters:
        buf - The byte buffer containing the BCD data.
        pos - The starting position in the buffer.
        length - The number of DIGITS (not bytes) to read.
        Throws:
        java.lang.IndexOutOfBoundsException

      • decodeRightPaddedToBigInteger

        public static java.math.BigInteger decodeRightPaddedToBigInteger​(byte[] buf,
                                                                 int pos,
                                                                 int length)
                                                          throws java.lang.IndexOutOfBoundsException
        Decodes a right-padded BCD-encoded number as a BigInteger.
        Parameters:
        buf - The byte buffer containing the BCD data.
        pos - The starting position in the buffer.
        length - The number of DIGITS (not bytes) to read.
        Throws:
        java.lang.IndexOutOfBoundsException

      • parseBcdLength

        public static int parseBcdLength​(byte b)
        Convert two bytes of BCD length to an int, e.g. 0x4521 into 4521, starting at the specified offset.

      • parseBcdLength2bytes

        public static int parseBcdLength2bytes​(byte[] b,
                                       int offset)
        Convert two bytes of BCD length to an int, e.g. 0x4521 into 4521, starting at the specified offset.