org.apache.drill.exec.expr.fn.impl

Class ByteFunctionHelpers

java.lang.Object

org.apache.drill.exec.expr.fn.impl.ByteFunctionHelpers

public class ByteFunctionHelpers
extends Object

Constructor Summary

Constructors

Constructor and Description
ByteFunctionHelpers()

Method Summary

Modifier and Type	Method and Description
static int	compare(DrillBuf left, int lStart, int lEnd, byte[] right, int rStart, int rEnd) Helper function to compare a set of bytes in DrillBuf to a ByteArray.
static int	compare(DrillBuf left, int lStart, int lEnd, DrillBuf right, int rStart, int rEnd) Helper function to compare a set of bytes in two DrillBuffers.
static int	equal(DrillBuf left, int lStart, int lEnd, DrillBuf right, int rStart, int rEnd) Helper function to check for equality of bytes in two DrillBuffers
static int	getInteger(byte[] b, int index)
static int	getInteger(byte[] b, int index, boolean ignoreSign)
static boolean	getSign(byte[] b)
static void	setInteger(byte[] b, int index, int value)
static void	setSign(byte[] b, boolean sign)

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteFunctionHelpers

public ByteFunctionHelpers()

Method Detail

equal

public static final int equal(DrillBuf left,
                              int lStart,
                              int lEnd,
                              DrillBuf right,
                              int rStart,
                              int rEnd)

Helper function to check for equality of bytes in two DrillBuffers

Parameters:

left - Left DrillBuf for comparison

lStart - start offset in the buffer

lEnd - end offset in the buffer

right - Right DrillBuf for comparison

rStart - start offset in the buffer

rEnd - end offset in the buffer

Returns:

1 if left input is greater, -1 if left input is smaller, 0 otherwise

compare

public static final int compare(DrillBuf left,
                                int lStart,
                                int lEnd,
                                DrillBuf right,
                                int rStart,
                                int rEnd)

Helper function to compare a set of bytes in two DrillBuffers. Function will check data before completing in the case that

Parameters:

left - Left DrillBuf to compare

lStart - start offset in the buffer

lEnd - end offset in the buffer

right - Right DrillBuf to compare

rStart - start offset in the buffer

rEnd - end offset in the buffer

Returns:

1 if left input is greater, -1 if left input is smaller, 0 otherwise

compare

public static final int compare(DrillBuf left,
                                int lStart,
                                int lEnd,
                                byte[] right,
                                int rStart,
                                int rEnd)

Helper function to compare a set of bytes in DrillBuf to a ByteArray.

Parameters:

left - Left DrillBuf for comparison purposes

lStart - start offset in the buffer

lEnd - end offset in the buffer

right - second input to be compared

rStart - start offset in the byte array

rEnd - end offset in the byte array

Returns:

1 if left input is greater, -1 if left input is smaller, 0 otherwise

getInteger

public static int getInteger(byte[] b,
                             int index)

getInteger

public static int getInteger(byte[] b,
                             int index,
                             boolean ignoreSign)

setInteger

public static void setInteger(byte[] b,
                              int index,
                              int value)

setSign

public static void setSign(byte[] b,
                           boolean sign)

getSign

public static boolean getSign(byte[] b)