Util.java

/*
    Bible Plus A Bible Reader for Blackberry
    Copyright (C) 2010 Yohanes Nugroho

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

    Yohanes Nugroho (yohanes@gmail.com)
 */

package com.compactbyte.bibleplus.reader;

public class Util {

	static char[] hebrewtab;

	static char[] greektab;

	public static int readInt(byte[] data, int offs) {
		return (((data[offs] & 0xff) << 24) |
			((data[offs + 1] & 0xff) << 16) |
			((data[offs + 2] & 0xff) << 8) | (data[offs + 3] & 0xff));
	}

	public static int readShort(byte[] data, int offs) {
		return ((data[offs] & 0xff) << 8) | (data[offs + 1] & 0xff);
	}

	public static String readString(byte[] data, int offs, int length, String encoding) {
		try {
			//			byte[] b = new byte[length];
//			System.arraycopy(data, offs, b, 0, length);
//			Log.d("readString", (s.length() > 20? s.substring(0, 20): s) + " encoding " + encoding + " from " + Arrays.toString(b));
			return new String(data, offs, length, encoding);
		} catch (java.io.UnsupportedEncodingException e) {
			return readStringISO8859_1(data, offs, length);
		}
	}

	public static String readStringGreek(byte[] data, int offs, int length) {
		return readStringWithTable(data, offs, length, greektab);
	}

	public static String readStringHebrew(byte[] data, int offs, int length) {
		return readStringWithTable(data, offs, length, hebrewtab);
	}
	
	private static String readStringWithTable(byte[] data, int offs, int length, char[] tab) {
		char[] s = new char[length];
		for (int i = 0; i < length; i++) {
			s[i] = tab[data[offs+i] & 0xff];
		}
		return new String(s);
	}

	public static String readStringISO8859_1(byte[] data, int offs, int length) {
		try {
			return new String(data, offs, length, "ISO-8859-1");
		} catch (java.io.UnsupportedEncodingException e) {

			return "";
		}
	}

	public static String readStringTrimZeroWithMaybeGreekHebrew(byte[] data, int offs, int length, BiblePlusPDB bible) {
		if (bible.isGreek()) {
			return readStringTrimZeroWithTable(data, offs, length, greektab);
		} else if (bible.isHebrew()) {
			return readStringTrimZeroWithTable(data, offs, length, hebrewtab);
		} else {
			return readStringTrimZero(data, offs, length, bible.getEncoding());
		}
	}
	
	public static String readStringWithMaybeGreekHebrew(byte[] data, int offs, int length, BiblePlusPDB bible) {
		if (bible.isGreek()) {
			return readStringWithTable(data, offs, length, greektab);
		} else if (bible.isHebrew()) {
			return readStringWithTable(data, offs, length, hebrewtab);
		} else {
			return readString(data, offs, length, bible.getEncoding());
		}
	}
	
	public static String readStringTrimZeroWithTable(byte[] data, int offs, int length, char[] tab) {
		int i = offs + length - 1;
		while (i >= offs) {
			if (data[i] != 0) {
				break;
			}
			i--;
		}
		int len = i - offs + 1;
		if (len < 0) {
			return "";
		}
		
		return readStringWithTable(data, offs, len, tab);
	}
	
	public static String readStringTrimZero(byte[] data, int offs, int length, String encoding) {
		try {
			int i = offs + length - 1;
			while (i >= offs) {
				if (data[i] != 0) {
					break;
				}
				i--;
			}
			int len = i - offs + 1;
			if (len < 0) {
				return "";
			}
			
			String s;
						
			s = new String(data, offs, len, encoding);
			
//			byte[] b = new byte[len];
//			System.arraycopy(data, offs, b, 0, len);
//			Log.d("readString(TZ)", (s.length() > 20? s.substring(0, 20): s) + " encoding " + encoding + " from " + dumpByteArray(b));

			return s;
		} catch (java.io.UnsupportedEncodingException e) {
			return "";
		}
	}

	public static void setTables(char[] _hebrewtab, char[] _greektab) {
		hebrewtab = _hebrewtab;
		greektab = _greektab;
	}

}