com.generallycloud.baseio.common.StringLexer Maven / Gradle / Ivy

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/*
 * Copyright 2015-2017 GenerallyCloud.com
 *  
 * 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.
 */ 
package com.generallycloud.baseio.common;

public class StringLexer {

	private int index;
	
	private char [] codes;
	
	public StringLexer(int index, char[] codes) {
		this.index = index;
		this.codes = codes;
	}
	
	public void previous(){
		index--;
	}
	
	public boolean next(int size){
		return (index+=size) < codes.length;
	}
	
//	public char [] sub(int start,int size){
//		if(start+size < codes.length){
//			char []chs = new char[size];
//			for (int i = 0; i < size; i++) {
//				chs[i] = 
//			}
//		}else{
//			return null;
//		}
//	}

	public boolean next(){
		return ++index < codes.length;
//		if (++index == codes.length) {
//			//throw new JSONSyntaxException("eof");
//			return EOF;
//		}
//		return codes[index];
	}
	
	public char charAt(int index){
		return codes[index];
	}
	
	public char current(){
		return codes[index];
	}
	
	public int currentIndex(){
		return index;
	}
	
	public boolean complate(){
		return index + 1 == codes.length;
	}
	
	@Override
	public String toString() {
		return new String(codes);
	}
}