fixed some issues with the collections lib

libs/collections/hashmap.c

@@ -1,6 +1,7 @@
 #include "hashmap.h"
 #include <groundext.h>
 #include <groundvm.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <uthash.h>
@@ -142,6 +143,26 @@ GroundValue destroyHashmapStruct(GroundScope* scope, List args) {
     return groundCreateValue(NONE);
 }
 
+GroundValue duplicateHashmapStruct(GroundScope* scope, List args) {
+    GroundObject* self = args.values[0].data.customVal;
+    GroundValue newSelf = groundCreateValue(CUSTOM, &hashmapStruct);
+
+    HashmapItem* src, *dst = NULL, *item, *tmp;
+    HASH_ITER(hh, src, item, tmp) {
+        HashmapItem *copy = malloc(sizeof(HashmapItem));
+        *copy = *item;
+        HASH_ADD_KEYPTR(hh, dst, copy->key, strlen(copy->key), copy);
+    }
+
+    GroundVariable* ptrField = groundFindVariable(scope, "ptr");
+    if (ptrField == NULL) {
+        ERROR("A field called \"ptr\" was not found", "FieldNotFound");
+    }
+    ptrField->value.data.intVal = (int64_t)src;
+
+    return newSelf;
+}
+
 void initHashmaps(GroundScope* scope) {
     hashmapStruct = groundCreateStruct();
 
@@ -154,6 +175,7 @@ void initHashmaps(GroundScope* scope) {
     groundAddFunctionToStruct(&hashmapStruct, "removeIfPresent", hashmapStructRemoveIfPresent, BOOL, 1, STRING, "key"); // remove a key from the hashmap, returns true if the key was removed or false if it didn't exist
     
     groundAddFunctionToStruct(&hashmapStruct, "destructor", destroyHashmapStruct, ANY, 0); 
+    groundAddFunctionToStruct(&hashmapStruct, "duplicator", duplicateHashmapStruct, ANY, 1, CUSTOM); 
     groundAddNativeFunction(scope, "newHashmap", hashmapStructConstructor, CUSTOM, 0);
     groundAddNativeFunction(scope, "Hashmap_SOLS_CONSTRUCTOR", hashmapStructConstructor, CUSTOM, 0);
 }