2009scape-item-definition-editor/src/com/alex/utils/Utils.java

package com.alex.utils;

import com.alex.io.OutputStream;
import com.alex.store.Store;

import java.math.BigInteger;

public final class Utils {
   public static byte[] cryptRSA(byte[] data, BigInteger exponent, BigInteger modulus) {
      return (new BigInteger(data)).modPow(exponent, modulus).toByteArray();
   }

   public static byte[] getArchivePacketData(int indexId, int archiveId, byte[] archive) {
      OutputStream stream = new OutputStream(archive.length + 4);
      stream.writeByte(indexId);
      stream.writeShort(archiveId);
      stream.writeByte(0);
      stream.writeInt(archive.length);
      int offset = 8;

      for(int var6 = 0; var6 < archive.length; ++var6) {
         if(offset == 512) {
            stream.writeByte(-1);
            offset = 1;
         }

         stream.writeByte(archive[var6]);
         ++offset;
      }

      byte[] var61 = new byte[stream.getOffset()];
      stream.setOffset(0);
      stream.getBytes(var61, 0, var61.length);
      return var61;
   }

   public static int getNameHash(String name) {
      return name.toLowerCase().hashCode();
   }

   public static int getInterfaceDefinitionsSize(Store store) {
      return store.getIndexes()[3].getLastArchiveId() + 1;
   }

   public static int getInterfaceDefinitionsComponentsSize(Store store, int interfaceId) {
      return store.getIndexes()[3].getLastFileId(interfaceId) + 1;
   }

   public static int getAnimationDefinitionsSize(Store store) {
      int lastArchiveId = store.getIndexes()[20].getLastArchiveId();
      return lastArchiveId * 128 + store.getIndexes()[20].getValidFilesCount(lastArchiveId);
   }

   public static int getItemDefinitionsSize(Store store) {
      int lastArchiveId = store.getIndexes()[19].getLastArchiveId();
      return lastArchiveId * 256 + store.getIndexes()[19].getValidFilesCount(lastArchiveId);
   }

   public static int getNPCDefinitionsSize(Store store) {
      int lastArchiveId = store.getIndexes()[18].getLastArchiveId();
      return lastArchiveId * 128 + store.getIndexes()[18].getValidFilesCount(lastArchiveId);
   }

   public static int getObjectDefinitionsSize(Store store) {
      int lastArchiveId = store.getIndexes()[16].getLastArchiveId();
      return lastArchiveId * 256 + store.getIndexes()[16].getValidFilesCount(lastArchiveId);
   }

   public static int getGraphicDefinitionsSize(Store store) {
      int lastArchiveId = store.getIndexes()[21].getLastArchiveId();
      return lastArchiveId * 256 + store.getIndexes()[21].getValidFilesCount(lastArchiveId);
   }
}