com.google.zxing.common
Class BitSource

java.lang.Object
  extended by com.google.zxing.common.BitSource

public final class BitSource
extends Object

This provides an easy abstraction to read bits at a time from a sequence of bytes, where the number of bits read is not often a multiple of 8.

This class is thread-safe but not reentrant. Unless the caller modifies the bytes array it passed in, in which case all bets are off.

Since:
BlackBerry API 6.0.0

Constructor Summary
BitSource(byte[] bytes)
           
 
Method Summary
 int available()
           
 int readBits(int numBits)
           
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 



Constructor Detail

BitSource

public BitSource(byte[] bytes)
Parameters:
bytes - bytes from which this will read bits. Bits will be read from the first byte first. Bits are read within a byte from most-significant to least-significant bit.
Since:
BlackBerry API 6.0.0


Method Detail

readBits

public int readBits(int numBits)
Parameters:
numBits - number of bits to read
Returns:
int representing the bits read. The bits will appear as the least-significant bits of the int
Throws:
IllegalArgumentException - if numBits isn't in [1,32]
Since:
BlackBerry API 6.0.0

available

public int available()
Returns:
number of bits that can be read successfully
Since:
BlackBerry API 6.0.0





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