Add overwrite() to BitMap64

Author: Ezibenroc

pyroaring/bitmap.pxi

@@ -441,6 +441,23 @@ cdef class BitMap64(AbstractBitMap64):
         """
         self.__ixor__(other)
 
+    def overwrite(self, AbstractBitMap64 other):
+        """
+        Clear the bitmap and overwrite it with another.
+
+        >>> bm = BitMap64([3, 12])
+        >>> other = BitMap64([4, 14])
+        >>> bm.overwrite(other)
+        >>> other.remove(4)
+        >>> bm
+        BitMap64([4, 14])
+        >>> other
+        BitMap64([14])
+        """
+        if self._c_bitmap == other._c_bitmap:
+            raise ValueError('Cannot overwrite itself')
+        croaring.roaring64_bitmap_overwrite(self._c_bitmap, other._c_bitmap)
+
     def clear(self):
         """
         Remove all elements from this set.

pyroaring/croaring.pxd

@@ -168,6 +168,7 @@ cdef extern from "roaring.h":
     roaring64_bitmap_t *roaring64_bitmap_portable_deserialize_safe(const char *buf, size_t maxbytes)
     bool roaring64_bitmap_internal_validate(const roaring64_bitmap_t *r, const char **reason)
     roaring64_bitmap_t *roaring64_bitmap_add_offset_signed(const roaring64_bitmap_t *r, bool positive, uint64_t offset)
+    void roaring64_bitmap_overwrite(roaring64_bitmap_t *dest, const roaring64_bitmap_t *src)
     roaring64_iterator_t *roaring64_iterator_create(const roaring64_bitmap_t *r)
     void roaring64_iterator_free(roaring64_iterator_t *it)
     bool roaring64_iterator_has_value(const roaring64_iterator_t *it)

test.py

@@ -1560,7 +1560,6 @@ def test_copy_writable(self, list1: list[int], cow: bool) -> None:
         assert new_element in b2
         assert new_element not in b1
 
-    @pytest.mark.skipif(not is_32_bits, reason="not supported yet")
     @given(bitmap_cls, small_integer_list, small_integer_list, st.booleans())
     def test_overwrite(self, BitMapClass: type[EitherBitMap], list1: list[int], list2: list[int], cow: bool) -> None:
         assume(set(list1) != set(list2))