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SprmUtils.javaAPI DocApache Poi 3.0.13604Mon Jan 01 18:55:34 GMT 2007org.apache.poi.hwpf.sprm

SprmUtils

public class SprmUtils extends Object

Fields Summary
Constructors Summary
public SprmUtils()
Methods Summary
public static intaddSpecialSprm(short instruction, byte[] varParam, java.util.List list)

    byte[] sprm = new byte[varParam.length + 4];
    System.arraycopy(varParam, 0, sprm, 4, varParam.length);
    LittleEndian.putShort(sprm, instruction);
    LittleEndian.putShort(sprm, 2, (short)(varParam.length + 1));
    list.add(sprm);
    return sprm.length;
public static intaddSprm(short instruction, int param, byte[] varParam, java.util.List 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
        break;
    }
    LittleEndian.putShort(sprm, 0, instruction);
    list.add(sprm);
    return sprm.length;
public static intconvertBrcToInt(short[] brc)

    byte[] buf = new byte[4];
    LittleEndian.putShort(buf, brc[0]);
    LittleEndian.putShort(buf, LittleEndian.SHORT_SIZE, brc[1]);
    return LittleEndian.getInt(buf);
public static byte[]getGrpprl(java.util.List 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 = (byte[])sprmList.remove(0);
      System.arraycopy(sprm, 0, grpprl, index, sprm.length);
      index += sprm.length;
    }

    return grpprl;
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;