Copyright (c) 2000, 2011 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

public abstract class NumberLiteral extends Literal {

	char[] source;

	public NumberLiteral(char[] token, int s, int e) {
		this(s,e) ;
		this.source = token ;
	}

	public NumberLiteral(int s, int e) {
		super (s,e) ;
	}

	@Override
	public boolean isValidJavaStatement(){
		return false ;
	}

	@Override
	public char[] source(){
		return this.source;
	}
	protected static char[] removePrefixZerosAndUnderscores(char[] token, boolean isLong) {
		int max = token.length;
		int start = 0;
		int end = max - 1;
		if (isLong) {
			end--; // remove the 'L' or 'l'
		}
		if (max > 1 && token[0] == '0') {
			if (max > 2 && (token[1] == 'x' || token[1] == 'X')) {
				start = 2;
			} else if (max > 2 && (token[1] == 'b' || token[1] == 'B')) {
				start = 2;
			} else {
				start = 1;
			}
		}
		boolean modified = false;
		boolean ignore = true;
		loop: for (int i = start; i < max; i++) {
			char currentChar = token[i];
			switch(currentChar) {
				case '0' :
					// this is a prefix '0'
					if (ignore && !modified && (i < end)) {
						modified = true;
					}
					break;
				case '_' :
					modified = true;
					break loop;
				default :
					ignore = false;
			}
		}
		if (!modified) {
			return token;
		}
		ignore = true;
		StringBuffer buffer = new StringBuffer();
		buffer.append(token, 0, start);
		loop: for (int i = start; i < max; i++) {
			char currentChar = token[i];
			switch(currentChar) {
				case '0' :
					if (ignore && (i < end)) {
						// this is a prefix '0'
						continue loop;
					}
					break;
				case '_' :
					continue loop;
				default:
					ignore = false;
			}
			buffer.append(currentChar);
		}
		return buffer.toString().toCharArray();
	}
}