Method CodeExtract

UnLuac/src/unluac/decompile/CodeExtract.java:47–90

(Version version, int sizeOp, int sizeA, int sizeB, int sizeC)

  }
  
  public CodeExtract(Version version, int sizeOp, int sizeA, int sizeB, int sizeC) {
    switch(version.instructionformat.get()) {
      case LUA50:
        op = new Field(sizeOp, 0);
        A = new Field(sizeA, sizeB + sizeC + sizeOp);
        B = new Field(sizeB, sizeB + sizeOp);
        C = new Field(sizeC, sizeOp);
        k = null;
        Ax = null;
        sJ = null;
        Bx = new Field(sizeB + sizeC, sizeOp);
        sBx = new Field(sizeB + sizeC, sizeOp, size_to_mask(sizeB + sizeC) / 2);
        x = new Field(32, 0);
        break;
      case LUA51:
        op = new Field(6, 0);
        A = new Field(8, 6);
        B = new Field(9, 23);
        C = new Field(9, 14);
        k = null;
        Ax = new Field(26, 6);
        sJ = null;
        Bx = new Field(18, 14);
        sBx = new Field(18, 14, 131071);
        x = new Field(32, 0);
        break;
      case LUA54:
        op = new Field(7, 0);
        A = new Field(8, 7);
        B = new Field(8, 16);
        C = new Field(8, 24);
        k = new Field(1, 15);
        Ax = new Field(25, 7);
        sJ = new Field(25, 7, (1 << 24) - 1);
        Bx = new Field(17, 15);
        sBx = new Field(17, 15, (1 << 16) - 1);
        x = new Field(32, 0);
        break;
      default:
        throw new IllegalStateException();
    }
    Integer rk_offset = version.rkoffset.get();
    this.rk_offset = (rk_offset == null) ? -1 : rk_offset;
  }

  public boolean is_k(int field) {
    return field >= rk_offset;