use hashmap in constants buffer to speed up translation time with large files

src/hashmap/hashmap.h

@@ -0,0 +1,37 @@
+#ifndef HASHMAP_H
+#define HASHMAP_H
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct ArgonObject ArgonObject;
+
+typedef void (*free_val_func)(void *val);
+
+struct node {
+  uint64_t hash;
+  void *key;
+  void *val;
+  size_t order;
+  struct node *next;
+};
+struct hashmap {
+  size_t size;
+  size_t count;
+  size_t order;
+  struct node **list;
+};
+
+struct hashmap *createHashmap();
+
+void hashmap_free(struct hashmap *t, free_val_func free_val);
+
+int hashCode(struct hashmap *t, uint64_t hash);
+
+int hashmap_remove(struct hashmap *t, uint64_t hash);
+
+void hashmap_insert(struct hashmap *t, uint64_t hash, void *key,
+                    void *val, size_t order);
+
+void *hashmap_lookup(struct hashmap *t, uint64_t hash);
+
+#endif // HASHMAP_H