Mercurial > hg > ucx / file diff

--- a/src/map.c	Sun Nov 02 18:04:35 2025 +0100
+++ b/src/map.c	Mon Nov 03 19:55:04 2025 +0100
@@ -215,3 +215,55 @@
     }
     return 0;
 }
+
+int cxMapIntersection(CxMap *dst, const CxMap *src, const CxMap *other,
+        cx_clone_func clone_func, const CxAllocator *clone_allocator, void *data) {
+    if (clone_allocator == NULL) clone_allocator = cxDefaultAllocator;
+
+    CxMapIterator src_iter = cxMapIterator(src);
+    cx_foreach(const CxMapEntry *, entry, src_iter) {
+        if (!cxMapContains(other, *entry->key)) {
+            continue;
+        }
+        void** dst_mem = cxMapEmplace(dst, *entry->key);
+        if (dst_mem == NULL) {
+            return 1; // LCOV_EXCL_LINE
+        }
+        void *target = cxCollectionStoresPointers(dst) ? NULL : dst_mem;
+        void* dst_ptr = clone_func(target, entry->value, clone_allocator, data);
+        if (dst_ptr == NULL) {
+            cx_map_remove_uninitialized_entry(dst, *(entry->key));
+            return 1;
+        }
+        if (cxCollectionStoresPointers(dst)) {
+            *dst_mem = dst_ptr;
+        }
+    }
+    return 0;
+}
+
+int cxMapListIntersection(CxMap *dst, const CxMap *src, const CxList *keys,
+        cx_clone_func clone_func, const CxAllocator *clone_allocator, void *data) {
+    if (clone_allocator == NULL) clone_allocator = cxDefaultAllocator;
+
+    CxMapIterator src_iter = cxMapIterator(src);
+    cx_foreach(const CxMapEntry *, entry, src_iter) {
+        if (!cxListContains(keys, entry->key)) {
+            continue;
+        }
+        void** dst_mem = cxMapEmplace(dst, *entry->key);
+        if (dst_mem == NULL) {
+            return 1; // LCOV_EXCL_LINE
+        }
+        void *target = cxCollectionStoresPointers(dst) ? NULL : dst_mem;
+        void* dst_ptr = clone_func(target, entry->value, clone_allocator, data);
+        if (dst_ptr == NULL) {
+            cx_map_remove_uninitialized_entry(dst, *(entry->key));
+            return 1;
+        }
+        if (cxCollectionStoresPointers(dst)) {
+            *dst_mem = dst_ptr;
+        }
+    }
+    return 0;
+}