Module org.maxicp

Package org.maxicp.util

Class NumberUtils

java.lang.Object

org.maxicp.util.NumberUtils

public class NumberUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
NumberUtils()

Method Summary

Modifier and Type	Method	Description
static int	ceilDiv(int v1, int v2)
static int	floorDiv(int v1, int v2)
static boolean	isPerfectSquare(int n)
static int	maxFloorDiv(int c, int... vals)
static int	minCeilDiv(int c, int... vals)
static boolean	negativeProduct(int v1, int v2)
static boolean	overFlowMul(int a, int b)
static boolean	positiveProduct(int v1, int v2)
static int	safeMul(int a, int b)

Methods inherited from class java.lang.Object

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

Constructor Details

NumberUtils

public NumberUtils()

Method Details

isPerfectSquare

public static boolean isPerfectSquare(int n)

negativeProduct

public static boolean negativeProduct(int v1,
 int v2)

positiveProduct

public static boolean positiveProduct(int v1,
 int v2)

ceilDiv

public static int ceilDiv(int v1,
 int v2)

Parameters:

v1 -

v2 - != 0

Returns:

ceil(v1/v2)

floorDiv

public static int floorDiv(int v1,
 int v2)

Parameters:

v1 -

v2 - != 0

Returns:

floor(v1/v2)

minCeilDiv

public static int minCeilDiv(int c,
 int... vals)

Parameters:

c - != 0

vals - different from 0

Returns:

min(ceil(c/v)) with v in vals

maxFloorDiv

public static int maxFloorDiv(int c,
 int... vals)

Parameters:

c - != 0

vals - different from 0

Returns:

max(floor(c/v)) with v in vals

overFlowMul

public static boolean overFlowMul(int a,
 int b)

Parameters:

a -

b -

Returns:

true if a*b generates an overflow

safeMul

public static int safeMul(int a,
 int b)

Parameters:

a -

b -

Returns:

a*b (rounded to Integer.MAX_VALUE /Integer.MIN_VALUE in case of overflow)