port SQLite fork to wasm

sdk/allocator.c

@@ -0,0 +1,13 @@
+#include "allocator.h"
+#include <stdlib.h>
+
+#define UNUSED(x) (void)(x)
+
+void *allocate(size_t size) {
+    return malloc(size);
+}
+
+void deallocate(void *ptr, size_t size) {
+    UNUSED(size);
+    free(ptr);
+}