merge_sort[T](le, b));
}
+fn swap[T](vec[mutable T] arr, uint x, uint y) {
+ auto a = arr.(x);
+ arr.(x) = arr.(y);
+ arr.(y) = a;
+}
+
+fn part[T](lteq[mutable T] compare_func, vec[mutable T] arr, uint left,
+ uint right, uint pivot) -> uint {
+
+ fn compare[T](lteq[mutable T] compare_func, vec[mutable T]arr,
+ uint arr_idx, &T arr_value) -> bool {
+
+ ret compare_func(arr.(arr_idx),arr_value);
+ }
+
+ auto pivot_value = arr.(pivot);
+ swap[T](arr, pivot, right);
+ let uint storage_index = left;
+ let uint i = left;
+ while (i<right) {
+ if (compare[T](compare_func, arr, i, pivot_value)) {
+ swap[T](arr, i, storage_index);
+ storage_index += 1u;
+ }
+ i += 1u;
+ }
+ swap[T](arr, storage_index, right);
+ ret storage_index;
+}
+
+fn qsort[T](lteq[mutable T] compare_func, vec[mutable T] arr, uint left,
+ uint right) {
+
+ if (right > left) {
+ auto pivot = (left+right)/2u;
+ auto new_pivot = part[T](compare_func, arr, left, right, pivot);
+ if (new_pivot == 0u) {
+ ret;
+ }
+ qsort[T](compare_func, arr, left, new_pivot - 1u);
+ qsort[T](compare_func, arr, new_pivot + 1u, right);
+ }
+}
+
+fn quick_sort[T](lteq[mutable T] compare_func, vec[mutable T] arr) {
+
+ if (len[mutable T](arr) == 0u) {
+ ret;
+ }
+ qsort[T](compare_func, arr, 0u, (len[mutable T](arr)) - 1u);
+}
+
// Local Variables:
// mode: rust;
// fill-column: 78;
--- /dev/null
+use std;
+
+fn check_sort(vec[mutable int] v1, vec[mutable int] v2) {
+ auto len = std._vec.len[int](v1);
+
+ fn ltequal(&int a, &int b) -> bool {
+ ret a <= b;
+ }
+ auto f = ltequal;
+ std.sort.quick_sort[int](f, v1);
+ auto i = 0u;
+ while (i < len) {
+ log v2.(i);
+ assert (v2.(i) == v1.(i));
+ i += 1u;
+ }
+}
+
+
+fn main() {
+ {
+ auto v1 = vec(mutable 3,7,4,5,2,9,5,8);
+ auto v2 = vec(mutable 2,3,4,5,5,7,8,9);
+ check_sort(v1, v2);
+ }
+
+ {
+ auto v1 = vec(mutable 1,1,1);
+ auto v2 = vec(mutable 1,1,1);
+ check_sort(v1, v2);
+ }
+
+ {
+ let vec[mutable int] v1 = vec(mutable);
+ let vec[mutable int] v2 = vec(mutable);
+ check_sort(v1, v2);
+ }
+
+ {
+ auto v1 = vec(mutable 9);
+ auto v2 = vec(mutable 9);
+ check_sort(v1, v2);
+ }
+
+ {
+ auto v1 = vec(mutable 9,3,3,3,9);
+ auto v2 = vec(mutable 3,3,3,9,9);
+ check_sort(v1, v2);
+ }
+
+}
+
+// Local Variables:
+// mode: rust;
+// fill-column: 78;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
+// End:
+
+