3.13

7zip/UI/Common/SortUtils.cpp

@@ -0,0 +1,30 @@
+// SortUtils.cpp
+
+#include "StdAfx.h"
+
+#include "SortUtils.h"
+
+static int __cdecl CompareStrings(const void *a1, const void *a2)
+{
+  const UString &s1 = *(*(*((const UString ***)a1)));
+  const UString &s2 = *(*(*((const UString ***)a2)));
+  return s1.CompareNoCase(s2);
+}
+
+void SortStringsToIndices(UStringVector &strings, CIntVector &indices)
+{
+  indices.Clear();
+  if (strings.IsEmpty())
+    return;
+  int numItems = strings.Size();
+  CPointerVector pointers;
+  pointers.Reserve(numItems);
+  indices.Reserve(numItems);
+  int i;
+  for(i = 0; i < numItems; i++)
+    pointers.Add(&strings.CPointerVector::operator[](i));
+  void **stringsBase  = (void **)pointers[0];
+  qsort(&pointers[0], numItems, sizeof(void *), CompareStrings);
+  for(i = 0; i < numItems; i++)
+    indices.Add((void **)pointers[i] - stringsBase);
+}