/*
Copyright (C) 1997-2001 Id Software, Inc.

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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

// Created on 09.12.2003 by RST.
// $Id: Lib.java,v 1.12 2005-01-09 23:41:53 cawe Exp $

package jake2.util;

import jake2.Globals;
import jake2.qcommon.Com;
import jake2.qcommon.FS;

import java.io.*;
import java.nio.*;

public class Lib {


	/*
	=============
	VectorToString
	
	This is just a convenience function
	for printing vectors
	=============
	*/
	public static String vtos(float[] v) {
		return (int) v[0] + " " + (int) v[1] + " " + (int) v[2];
	}
	public static String vtofs(float[] v) {
		return v[0] + " " + v[1] + " " + v[2];
	}
	public static String vtofsbeaty(float[] v) {
		return Com.sprintf("%8.2f %8.2f %8.2f", new Vargs().add(v[0]).add(v[1]).add(v[2]));
	}
	public static short rand() {
		//return (short) (Math.random() * 0x8000);
		return (short)Globals.rnd.nextInt(Short.MAX_VALUE+1);
	}
	public static float crandom() {
		return (Globals.rnd.nextFloat() - 0.5f) * 2.0f;
		//return (float) (Math.random() - 0.5) * 2.0f;
	}
	public static float random() {
		return Globals.rnd.nextFloat();
	}
	public static float crand() {
		return (Globals.rnd.nextFloat() - 0.5f) * 2.0f;
	}
	public static int strcmp(String in1, String in2) {
		return in1.compareTo(in2);
	}

	public static float atof(String in) {
		float res = 0;
	
		try {
			res = Float.parseFloat(in);
		}
		catch (Exception e) {
		}
	
		return res;
	}
	public static int Q_stricmp(String in1, String in2) {
		return in1.compareToIgnoreCase(in2);
	}
	//	  =================================================================================
	
	public static int atoi(String in) {
		try {
			return Integer.parseInt(in);
		}
		catch (Exception e) {
			return 0;
		}
	}
	public static float[] atov(String v) {
		float[] res = { 0, 0, 0 };
	
		int i1 = v.indexOf(" ");
		int i2 = v.indexOf(" ", i1 + 1);
	
		res[0] = atof(v.substring(0, i1));
		res[1] = atof(v.substring(i1 + 1, i2));
		res[2] = atof(v.substring(i2 + 1, v.length()));
	
		return res;
	}
	public static int strlen(char in[]) {
		for (int i = 0; i < in.length; i++)
			if (in[i] == 0)
				return i;
		return in.length;
	}
	public static int strlen(byte in[]) {
		for (int i = 0; i < in.length; i++)
			if (in[i] == 0)
				return i;
		return in.length;
	}

	public static String hexdumpfile(ByteBuffer bb, int len) throws IOException {
	
		ByteBuffer bb1 = bb.slice();
	
		byte buf[] = new byte[len];
	
		bb1.get(buf);
	
		return hexDump(buf, len, false);
	}
	// dump data as hexstring
	public static String hexDump(byte data1[], int len, boolean showAddress) {
		StringBuffer result = new StringBuffer();
		StringBuffer charfield = new StringBuffer();
		int i = 0;
		while (i < len) {
			if ((i & 0xf) == 0) {
				if (showAddress) {
					String address = Integer.toHexString(i);
					address = ("0000".substring(0, 4 - address.length()) + address).toUpperCase();
					result.append(address + ": ");
				}
			}
			int v = data1[i];
	
			result.append(hex2(v));
			result.append(" ");
	
			charfield.append(readableChar(v));
			i++;
	
			// nach dem letzten, newline einfuegen
			if ((i & 0xf) == 0) {
				result.append(charfield);
				result.append("\n");
				charfield.setLength(0);
			}
			//	in der Mitte ein Luecke einfuegen ?
			else if ((i & 0xf) == 8) {
				result.append(" ");
			}
		}
		return result.toString();
	}
	//formats an hex byte
	public static String hex2(int i) {
		String val = Integer.toHexString(i & 0xff);
		return ("00".substring(0, 2 - val.length()) + val).toUpperCase();
	}
	public static char readableChar(int i) {
		if ((i < 0x20) || (i > 0x7f))
			return '.';
		else
			return (char) i;
	}
	public static void printv(String in, float arr[]) {
		for (int n = 0; n < arr.length; n++) {
			Com.Println(in + "[" + n + "]: " + arr[n]);
		}
	}
	static final byte nullfiller[] = new byte[8192];
	public static void fwriteString(String s, int len, RandomAccessFile f) throws IOException {
		if (s ==  null) 
			return;
		int diff = len - s.length();
		if (diff > 0) {
			f.write(s.getBytes());
	
			f.write(nullfiller, 0, diff);
		}
		else
			f.write(s.getBytes(), 0, len);
	}
	public static RandomAccessFile fopen(String name, String mode) {
		try {
			return new RandomAccessFile(name, mode);
		}
		catch (Exception e) {
			Com.DPrintf("Could not open file:" + name);
			return null;
		}
	}
	public static void fclose(RandomAccessFile f) {
		try {
			f.close();
		}
		catch (Exception e) {
		}
	}
	public static String freadString(RandomAccessFile f, int len) {
		byte buffer[] = new byte[len];
		FS.Read(buffer, len, f);
	
		return Lib.CtoJava(buffer);
	}
	public static String rightFrom(String in, char c) {
		int pos = in.lastIndexOf(c);
		if (pos == -1)
			return "";
		else if (pos < in.length())
			return in.substring(pos + 1, in.length());
		return "";
	}
	public static String leftFrom(String in, char c) {
		int pos = in.lastIndexOf(c);
		if (pos == -1)
			return "";
		else if (pos < in.length())
			return in.substring(0, pos);
		return "";
	}

	public static int rename(String oldn, String newn) {
		try {
			File f1 = new File(oldn);
			File f2 = new File(newn);
			f1.renameTo(f2);
			return 0;
		}
		catch (Exception e) {
			return 1;
		}
	}
	public static byte[] getIntBytes(int c) {
		byte b[] = new byte[4];
		b[0] = (byte) ((c & 0xff));
		b[1] = (byte) ((c >>> 8) & 0xff);
		b[2] = (byte) ((c >>> 16) & 0xff);
		b[3] = (byte) ((c >>> 24) & 0xff);
		return b;
	}
	public static int getInt(byte b[]) {
		return (b[0] & 0xff) | ((b[1] & 0xff) << 8) | ((b[2] & 0xff) << 16) | ((b[3] & 0xff) << 24);
	}
	public static float[] clone(float in[]) {
		float out[] = new float[in.length];
	
		if (in.length != 0)
			System.arraycopy(in, 0, out, 0, in.length);
	
		return out;
	}
	
	public static String CtoJava(String old) {
	    int index = old.indexOf('\0');
	    if (index == 0) return "";
	    return (index > 0) ? old.substring(0, index) : old; 
	}
	
	public static String CtoJava(byte[] old) {
		return CtoJava(old, 0, old.length);
	}

	public static String CtoJava(byte[] old, int offset, int maxLenght) {
		if (old.length == 0 || old[0] == 0) return "";
	    int i;
	    for (i = offset; old[i] != 0 && (i - offset) < maxLenght; i++);
		return new String(old, offset, i - offset);
	}
	
	
	/*
	 * java.nio.* Buffer util functions
	 */
	
	public static final int SIZEOF_FLOAT = 4;
	public static final int SIZEOF_INT = 4;
	
	public static FloatBuffer newFloatBuffer(int numElements) {
	  ByteBuffer bb = newByteBuffer(numElements * SIZEOF_FLOAT);
	  return bb.asFloatBuffer();
	}
	public static FloatBuffer newFloatBuffer(int numElements, ByteOrder order) {
	  ByteBuffer bb = newByteBuffer(numElements * SIZEOF_FLOAT, order);
	  return bb.asFloatBuffer();
	}
	public static IntBuffer newIntBuffer(int numElements) {
	  ByteBuffer bb = newByteBuffer(numElements * SIZEOF_INT);
	  return bb.asIntBuffer();
	}
	public static IntBuffer newIntBuffer(int numElements, ByteOrder order) {
	  ByteBuffer bb = newByteBuffer(numElements * SIZEOF_INT, order);
	  return bb.asIntBuffer();
	}
	public static ByteBuffer newByteBuffer(int numElements) {
	  ByteBuffer bb = ByteBuffer.allocateDirect(numElements);
	  bb.order(ByteOrder.nativeOrder());
	  return bb;
	}
	public static ByteBuffer newByteBuffer(int numElements, ByteOrder order) {
	  ByteBuffer bb = ByteBuffer.allocateDirect(numElements);
	  bb.order(order);
	  return bb;
	}
}