+
+ public interface CompareFunc {
+ public int compare(Object a, Object b);
+ }
+
+ public void sort(CompareFunc c) {
+ sort(this, null, c, 0, size-1);
+ }
+
+ public static void sort(Vec a, Vec b, CompareFunc c) {
+ if (b != null && a.size != b.size) throw new IllegalArgumentException("Vec a and b must be of equal size");
+ sort(a, b, c, 0, a.size-1);
+ }
+
+ private static final void sort(Vec a, Vec b, CompareFunc c, int start, int end) {
+ Object tmpa, tmpb = null;
+ if(start >= end) return;
+ if(end-start <= 6) {
+ for(int i=start+1;i<=end;i++) {
+ tmpa = a.store[i];
+ if (b != null) tmpb = b.store[i];
+ int j;
+ for(j=i-1;j>=start;j--) {
+ if(c.compare(a.store[j],tmpa) <= 0) break;
+ a.store[j+1] = a.store[j];
+ if (b != null) b.store[j+1] = b.store[j];
+ }
+ a.store[j+1] = tmpa;
+ if (b != null) b.store[j+1] = tmpb;
+ }
+ return;
+ }
+
+ Object pivot = a.store[end];
+ int lo = start - 1;
+ int hi = end;
+
+ do {
+ while(c.compare(a.store[++lo],pivot) < 0) { }
+ while((hi > lo) && c.compare(a.store[--hi],pivot) > 0) { }
+ swap(a, lo,hi);
+ if (b != null) swap(b, lo,hi);
+ } while(lo < hi);
+
+ swap(a, lo,end);
+ if (b != null) swap(b, lo,end);
+
+ sort(a, b, c, start, lo-1);
+ sort(a, b, c, lo+1, end);
+ }
+
+ private static final void swap(Vec vec, int a, int b) {
+ if(a != b) {
+ Object tmp = vec.store[a];
+ vec.store[a] = vec.store[b];
+ vec.store[b] = tmp;
+ }
+ }