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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 *  EncodingGBK.java
 * ---------------
 */
package org.jpedal.fonts;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
import org.jpedal.utils.LogWriter;

/**
 *
 * @author suda
 */
public class EncodingGBK implements CmapEncoding {

	private final int[] uniMap = new int[65536];

	public EncodingGBK() {
		final ClassLoader loader = this.getClass().getClassLoader();
		String line;
		int gbkVal, unicodeVal;
		final BufferedReader input_stream;

		try {
			input_stream = new BufferedReader(
					new InputStreamReader(loader.getResourceAsStream("org/jpedal/res/pdf/GBKtoUNI.cfg")));
			while (true) {
				line = input_stream.readLine();
				if (line == null) {
					break;
				}
				if (line.startsWith("0x")) {
					final StringTokenizer values = new StringTokenizer(line);
					final String xx = values.nextToken().substring(2);
					final String yy = values.nextToken().substring(2);
					gbkVal = Integer.parseInt(xx, 16);
					unicodeVal = Integer.parseInt(yy, 16);
					uniMap[gbkVal] = unicodeVal;
				}
			}
			input_stream.close();
		} catch (final Exception e) {
			LogWriter.writeLog("Exception: " + e.getMessage());
		}
	}

	@Override
	public int getUnicodeValue(final int cid) {
		if (cid <= 0x7f) {
			return cid;
		}
		return uniMap[cid];
	}

}