public IntCharSet and()

in jflex/src/main/java/jflex/core/unicode/IntCharSet.java [314:355]

32 lines of code
9 McCabe index (conditional complexity)


  public IntCharSet and(IntCharSet set) {
    if (DEBUG) {
      Out.dump("intersection");
      Out.dump("this  : " + this);
      Out.dump("other : " + set);
    }

    IntCharSet result = new IntCharSet();

    int i = 0; // index in this.intervals
    int j = 0; // index in set.intervals

    int size = intervals.size();
    int setSize = set.intervals.size();

    while (i < size && j < setSize) {
      Interval x = this.intervals.get(i);
      Interval y = set.intervals.get(j);

      if (x.end < y.start) {
        i++;
        continue;
      }

      if (y.end < x.start) {
        j++;
        continue;
      }

      result.intervals.add(new Interval(max(x.start, y.start), min(x.end, y.end)));

      if (x.end >= y.end) j++;
      if (y.end >= x.end) i++;
    }

    if (DEBUG) {
      Out.dump("result: " + result);
      assert result.invariants();
    }

    return result;
  }