Merge branch 'master' into doe

1 files changed, 83 insertions, 0 deletions

diff --git a/test-chill/unit-tests/cprog/QuickSorter.cc b/test-chill/unit-tests/cprog/QuickSorter.cc
new file mode 100644
index 0000000..3ade346
--- /dev/null
+++ b/test-chill/unit-tests/cprog/QuickSorter.cc
@@ -0,0 +1,83 @@
+#include "QuickSorter.h"
+
+/* Python
+
+def swap(l, i, k):
+    v = l[i]
+    l[i] = l[k]
+    l[k] = v
+    print(str(l))
+
+def partition(l, start, end):
+    print("PARTITION {} [{}:{}]".format(l, start, end))
+    p_value = l[end]
+    p_index = end-1
+    
+    for i in range(start, end):
+        while(i < p_index and l[i] >= p_value):
+            swap(l, i, p_index)
+            p_index -= 1
+        while(i >= p_index and l[i] < p_value):
+            swap(l, i, p_index)
+            p_index += 1
+    swap(l, p_index, end)
+    print("DONE {}|[{}]|{}:{}".format(l[start:p_index], l[p_index], l[p_index+1:end+1], p_value))
+    return p_index
+
+def qsort(l, i, k):
+    if i < k:
+        p = partition(l, i, k)
+        qsort(l,i,p-1)
+        qsort(l,p+1,k)
+
+if __name__ == "__main__":
+    import random as r
+    x = [int(r.random()*12) for i in range(12)]
+    print(x)
+    qsort(x, 0, len(x)-1)
+    print(x)
+    
+*/
+
+static void swap(std::vector<int>& list, int i, int k) {
+    int v = list[i];
+    list[i] = list[k];
+    list[k] = v;
+}
+
+static int partition(std::vector<int>& list, int i, int k) {
+    int pivot_value = list[k];
+    int pivot_index = k - 1;
+    
+    for(int index = i; index < k; index++) {
+        while((index < pivot_index) && (list[index] >= pivot_value)) {
+            swap(list, index, pivot_index);
+            pivot_index--;
+        }
+        while((index >= pivot_index) && (list[index] < pivot_value)) {
+            swap(list, index, pivot_index);
+            pivot_index++;
+        }
+    }
+    swap(list, pivot_index, k);
+    return pivot_index;
+}
+
+static void quicksort(std::vector<int>& list, int i, int k) {
+    if(i < k) {
+        int p = partition(list, i, k);
+        quicksort(list, i, p-1);
+        quicksort(list, p+1, k);
+    }
+}
+
+QuickSorter::QuickSorter() {
+    this->name = std::string("quicksort");
+}
+
+QuickSorter::~QuickSorter() {
+}
+
+void QuickSorter::sort(std::vector<int>& list) const {
+    quicksort(list, 0, list.size()-1);
+}