com.esri.core.geometry.NumberUtils Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of esri-geometry-api Show documentation
The Esri Geometry API for Java enables developers to write custom applications for analysis of spatial data.
There is a newer version: 2.2.4
/*
 Copyright 1995-2013 Esri

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 For additional information, contact:
 Environmental Systems Research Institute, Inc.
 Attn: Contracts Dept
 380 New York Street
 Redlands, California, USA 92373

 email: [email protected]
 */

package com.esri.core.geometry;

class NumberUtils {

	static int snap(int v, int minv, int maxv) {
		return v < minv ? minv : v > maxv ? maxv : v;
	}

	static long snap(long v, long minv, long maxv) {
		return v < minv ? minv : v > maxv ? maxv : v;
	}

	public static double snap(double v, double minv, double maxv) {
		return v < minv ? minv : v > maxv ? maxv : v;
	}

	public static int sizeOf(double v) {
		return 8;
	}

	public static int sizeOfDouble() {
		return 8;
	}

	public static int sizeOf(int v) {
		return 4;
	}

	public static int sizeOf(long v) {
		return 8;
	}

	public static int sizeOf(byte v) {
		return 1;
	}

	public static boolean isNaN(double d) {
		return Double.isNaN(d);
	}

	public final static double TheNaN = Double.NaN;

	public static double NaN() {
		return Double.NaN;
	}

	// public static void main(String[] args)
	// {
	// System.out.println(Long.toHexString(Double.doubleToLongBits(Double.NaN)));
	// System.out.println(Double.longBitsToDouble(0x7FF8000000000001L));
	//
	// System.out.println(Long.toHexString(Double.doubleToLongBits(Double.NEGATIVE_INFINITY)));
	// System.out.println(Double.longBitsToDouble(0xFFF8000000000000L));
	// System.out.println(Double.NEGATIVE_INFINITY);
	// }

	public static int hash(int n) {
		int hash = 5381;
		hash = ((hash << 5) + hash) + (n & 0xFF); /* hash * 33 + c */
		hash = ((hash << 5) + hash) + ((n >> 8) & 0xFF);
		hash = ((hash << 5) + hash) + ((n >> 16) & 0xFF);
		hash = ((hash << 5) + hash) + ((n >> 24) & 0xFF);
		hash &= 0x7FFFFFFF;
		return hash;
	}

	public static int hash(double d) {
		long bits = Double.doubleToLongBits(d);
		int hc = (int) (bits ^ (bits >>> 32));
		return hash(hc);
	}

	public static int hash(int hashIn, int n) {
		int hash = ((hashIn << 5) + hashIn) + (n & 0xFF); /* hash * 33 + c */
		hash = ((hash << 5) + hash) + ((n >> 8) & 0xFF);
		hash = ((hash << 5) + hash) + ((n >> 16) & 0xFF);
		hash = ((hash << 5) + hash) + ((n >> 24) & 0xFF);
		hash &= 0x7FFFFFFF;
		return hash;
	}

	public static int hash(int hash, double d) {
		long bits = Double.doubleToLongBits(d);
		int hc = (int) (bits ^ (bits >>> 32));
		return hash(hash, hc);
	}

	public static long doubleToInt64Bits(double d) {
		return Double.doubleToLongBits(d);
	}

	public static double negativeInf() {
		return Double.NEGATIVE_INFINITY;
	}

	public static double positiveInf() {
		return Double.POSITIVE_INFINITY;
	}

	public static int intMax() {
		return Integer.MAX_VALUE;
	}

	public static double doubleEps() {
		return 2.2204460492503131e-016;
	}

	public static double doubleMax() {
		return Double.MAX_VALUE;
	}

	public static int nextRand(int prevRand) {
		return (1103515245 * prevRand + 12345) & intMax(); // according to Wiki,
															// this is gcc's
	}

}