| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 org.apache.poi.hwpf.sprm; |
| |
| import java.util.List; |
| |
| import org.apache.poi.util.Internal; |
| import org.apache.poi.util.LittleEndian; |
| |
| |
| @Internal |
| public final class SprmUtils |
| { |
| public SprmUtils() |
| { |
| } |
| |
| public static byte[] shortArrayToByteArray(short[] convert) |
| { |
| byte[] buf = new byte[convert.length * LittleEndian.SHORT_SIZE]; |
| |
| for (int x = 0; x < convert.length; x++) |
| { |
| LittleEndian.putShort(buf, x * LittleEndian.SHORT_SIZE, convert[x]); |
| } |
| |
| return buf; |
| } |
| |
| public static int addSpecialSprm(short instruction, byte[] varParam, List<byte[]> list) |
| { |
| byte[] sprm = new byte[varParam.length + 4]; |
| System.arraycopy(varParam, 0, sprm, 4, varParam.length); |
| LittleEndian.putShort(sprm, 0, instruction); |
| LittleEndian.putShort(sprm, 2, (short)(varParam.length + 1)); |
| list.add(sprm); |
| return sprm.length; |
| } |
| |
| public static int addSprm( short instruction, boolean param, |
| List<byte[]> list ) |
| { |
| return addSprm( instruction, param ? 1 : 0, null, list ); |
| } |
| |
| public static int addSprm(short instruction, int param, byte[] varParam, List<byte[]> list) |
| { |
| int type = (instruction & 0xe000) >> 13; |
| |
| byte[] sprm = null; |
| switch(type) |
| { |
| case 0: |
| case 1: |
| sprm = new byte[3]; |
| sprm[2] = (byte)param; |
| break; |
| case 2: |
| sprm = new byte[4]; |
| LittleEndian.putShort(sprm, 2, (short)param); |
| break; |
| case 3: |
| sprm = new byte[6]; |
| LittleEndian.putInt(sprm, 2, param); |
| break; |
| case 4: |
| case 5: |
| sprm = new byte[4]; |
| LittleEndian.putShort(sprm, 2, (short)param); |
| break; |
| case 6: |
| sprm = new byte[3 + varParam.length]; |
| sprm[2] = (byte)varParam.length; |
| System.arraycopy(varParam, 0, sprm, 3, varParam.length); |
| break; |
| case 7: |
| sprm = new byte[5]; |
| // this is a three byte int so it has to be handled special |
| byte[] temp = new byte[4]; |
| LittleEndian.putInt(temp, 0, param); |
| System.arraycopy(temp, 0, sprm, 2, 3); |
| break; |
| default: |
| //should never happen |
| throw new RuntimeException("Invalid sprm type"); |
| } |
| LittleEndian.putShort(sprm, 0, instruction); |
| list.add(sprm); |
| return sprm.length; |
| } |
| |
| public static byte[] getGrpprl(List<byte[]> sprmList, int size) |
| { |
| // spit out the final grpprl |
| byte[] grpprl = new byte[size]; |
| int listSize = sprmList.size() - 1; |
| int index = 0; |
| for (; listSize >= 0; listSize--) |
| { |
| byte[] sprm = sprmList.remove(0); |
| System.arraycopy(sprm, 0, grpprl, index, sprm.length); |
| index += sprm.length; |
| } |
| |
| return grpprl; |
| |
| } |
| |
| public static int convertBrcToInt(short[] brc) |
| { |
| byte[] buf = new byte[4]; |
| LittleEndian.putShort(buf, 0, brc[0]); |
| LittleEndian.putShort(buf, LittleEndian.SHORT_SIZE, brc[1]); |
| return LittleEndian.getInt(buf); |
| } |
| } |