1 files changed, 69 insertions, 0 deletions
diff --git a/src/utils/refcheck.c b/src/utils/refcheck.c
new file mode 100644
index 0000000..fbba568
--- /dev/null
+++ b/src/utils/refcheck.c
@@ -0,0 +1,69 @@
+/*
+ * This file is part of libdom.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2021 Michael Drake <tlsa@netsurf-browser.org>
+ */
+
+/** \file
+ * This is an API for walking a loaded DOM.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <dom/dom.h>
+
+struct dom_refcheck {
+	size_t len;
+	uintptr_t *array;
+};
+
+struct dom_refcheck *dom_refcheck(
+		struct dom_refcheck *rc,
+		uint32_t refcnt)
+{
+	if (rc == NULL) {
+		rc = calloc(1, sizeof(*rc));
+		if (rc == NULL) {
+			goto out;
+		}
+
+		if (refcnt == 0) {
+			goto out;
+		}
+	}
+
+	fprintf(stderr, "%p: refcnt: %u, len: %zu\n", rc, refcnt, rc->len);
+
+	if (refcnt == rc->len - 1) {
+		//rc->array[refcnt] ^= UINTPTR_MAX;
+		free((void *)rc->array[refcnt]);
+		rc->array[refcnt] = (uintptr_t)NULL;
+		rc->len = refcnt;
+
+	} else if (refcnt == rc->len + 1) {
+		uintptr_t *temp = realloc(rc->array, sizeof(*temp) * refcnt);
+		if (temp == NULL) {
+			goto out;
+		}
+		rc->array = temp;
+
+		rc->array[rc->len] = (uintptr_t)malloc(1);
+		//rc->array[rc->len] ^= UINTPTR_MAX;
+		rc->len = refcnt;
+	}
+
+	if (refcnt == 0) {
+		free(rc->array);
+		free(rc);
+		rc = NULL;
+		goto out;
+
+	} else {
+	}
+
+out:
+	return rc;
+}