clear method

k-wojcik · Jul 24, 2024 · b641ce1 · b641ce1
1 parent 6a387f8
commit b641ce1
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diff --git a/src/Roaring.Net/NativeMethods.cs b/src/Roaring.Net/NativeMethods.cs
@@ -55,6 +55,9 @@ internal static unsafe class NativeMethods
     [DllImport("roaring")]
     public static extern void roaring_bitmap_remove_range_closed(IntPtr bitmap, uint min, uint max);
 
+    [DllImport("roaring")]
+    public static extern void roaring_bitmap_clear(IntPtr bitmap);
+
     [DllImport("roaring")]
     public static extern void roaring_bitmap_remove_many(IntPtr bitmap, uint count, uint* values);
 

diff --git a/src/Roaring.Net/Roaring32/Roaring32Bitmap.cs b/src/Roaring.Net/Roaring32/Roaring32Bitmap.cs
@@ -147,6 +147,8 @@ public void RemoveRange(uint min, uint max)
         NativeMethods.roaring_bitmap_remove_range_closed(_pointer, min, max);
     }
 
+    public void Clear() => NativeMethods.roaring_bitmap_clear(_pointer);
+
     // TODO roaring_bitmap_contains_bulk
 
     public bool Contains(uint value) => NativeMethods.roaring_bitmap_contains(_pointer, value);

diff --git a/test/Roaring.Net.Test/Roaring32/RemoveTests.cs b/test/Roaring.Net.Test/Roaring32/RemoveTests.cs
@@ -164,4 +164,30 @@ public void RemoveRange_CorrectRange_BitmapRemovesRange(uint minTest, uint maxTe
 
         Assert.Equal(expected, actual);
     }
+
+    [Fact]
+    public void Clear_BitmapIsEmpty_DoesNotRemoveValues()
+    {
+        // Arrange
+        using var testObject = Roaring32BitmapTestObject.GetEmpty();
+
+        // Act
+        testObject.Bitmap.Clear();
+
+        // Assert
+        Assert.Empty(testObject.Bitmap.Values);
+    }
+
+    [Fact]
+    public void Clear_BitmapHasValues_RemovesAllValuesFromBitmap()
+    {
+        // Arrange
+        using var testObject = Roaring32BitmapTestObject.GetDefault();
+
+        // Act
+        testObject.Bitmap.Clear();
+
+        // Assert
+        Assert.Empty(testObject.Bitmap.Values);
+    }
 }