Mercurial > hg > ucx / file diff

--- a/src/cx/map.h	Fri Nov 07 19:23:21 2025 +0100
+++ b/src/cx/map.h	Sat Nov 08 23:45:19 2025 +0100
@@ -603,6 +603,123 @@
 CX_EXPORT int cxMapUnion(CxMap *dst, const CxMap *src,
         cx_clone_func clone_func, const CxAllocator *clone_allocator, void *data);
 
+/**
+ * Performs a shallow clone of one map into another.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * If the destination map already contains entries, the cloned entries
+ * are added to that map, possibly overwriting existing elements when
+ * the keys already exist.
+ *
+ * When elements in the destination map need to be replaced, any destructor
+ * function is called on the replaced elements before replacing them.
+ *
+ * @attention If the cloned elements need to be destroyed by a destructor
+ * function, you must make sure that the destination map also uses this
+ * destructor function.
+ *
+ * @param dst the destination map
+ * @param src the source map
+ * @retval zero when all elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ * @see cxMapClone()
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapCloneSimple(CxMap *dst, const CxMap *src);
+
+/**
+ * Clones entries of a map if their key is not present in another map.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * @param dst the destination map
+ * @param minuend the map to subtract the entries from
+ * @param subtrahend the map containing the elements to be subtracted
+ * @retval zero when the elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapDifferenceSimple(CxMap *dst, const CxMap *minuend, const CxMap *subtrahend);
+
+/**
+ * Clones entries of a map if their key is not present in a list.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * Note that the list must contain keys of type @c CxKey
+ * (or pointers to such keys) and must use @c cx_hash_key_cmp
+ * as the compare function.
+ * Generic key types cannot be processed in this case.
+ *
+ * @param dst the destination map
+ * @param src the source map
+ * @param keys the list of @c CxKey items
+ * @retval zero when the elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ * @see cxMapListDifference()
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapListDifferenceSimple(CxMap *dst, const CxMap *src, const CxList *keys);
+
+
+/**
+ * Clones entries of a map only if their key is present in another map.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * @param dst the destination map
+ * @param src the map to clone the entries from
+ * @param other the map to check for existence of the keys
+ * @retval zero when the elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapIntersectionSimple(CxMap *dst, const CxMap *src, const CxMap *other);
+
+/**
+ * Clones entries of a map only if their key is present in a list.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * Note that the list must contain keys of type @c CxKey
+ * (or pointers to such keys) and must use @c cx_hash_key_cmp
+ * as the compare function.
+ * Generic key types cannot be processed in this case.
+ *
+ * @param dst the destination map
+ * @param src the source map
+ * @param keys the list of @c CxKey items
+ * @retval zero when the elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapListIntersectionSimple(CxMap *dst, const CxMap *src, const CxList *keys);
+
+/**
+ * Clones entries into a map if their key does not exist yet.
+ *
+ * This function uses the default allocator, if needed, and performs
+ * shallow clones with @c memcpy().
+ *
+ * If you want to calculate the union of two maps into a fresh new map,
+ * you can proceed as follows:
+ * 1. Clone the first map into a fresh, empty map.
+ * 2. Use this function to clone the second map into the result from step 1.
+ *
+ * @param dst the destination map
+ * @param src the map to clone the entries from
+ * @retval zero when the elements were successfully cloned
+ * @retval non-zero when an allocation error occurred
+ */
+cx_attr_nonnull
+CX_EXPORT int cxMapUnionSimple(CxMap *dst, const CxMap *src);
+
 #ifdef    __cplusplus
 } // extern "C"
 #endif