Add the ability to store values into the table.

include/table.h

@@ -52,6 +52,7 @@ struct libab_table_entry_s {
         libab_operator op;
         libab_function function;
         libab_basetype* basetype;
+        libab_ref value;
     } data_u;
 };
 
@@ -111,6 +112,15 @@ libab_function* libab_table_search_function(libab_table* table,
  */
 libab_basetype* libab_table_search_basetype(libab_table* table,
                                             const char* string);
+/**
+ * Searches for the given value in the table.
+ * @param table the table to search.
+ * @param string the table entry key.
+ * @param ref the reference to store the result into.
+ */
+void libab_table_search_value(libab_table* table,
+                                          const char* string,
+                                          libab_ref* ref);
 /**
  * Stores the given entry in the table under the given key.
  * @param table the table to store the entry into.

src/table.c

@@ -77,6 +77,23 @@ libab_basetype* libab_table_search_basetype(libab_table* table,
     return entry ? entry->data_u.basetype : NULL;
 }
 
+int _table_compare_value(const void* left, const void* right) {
+    const libab_table_entry* entry = right;
+    return entry->variant == ENTRY_VALUE;
+}
+
+void libab_table_search_value(libab_table* table,
+                                          const char* string,
+                                          libab_ref* ref) {
+    libab_table_entry* entry = 
+        libab_table_search_filter(table, string, NULL, _table_compare_value);
+    if(entry) {
+        libab_ref_copy(&entry->data_u.value, ref);
+    } else {
+        libab_ref_null(ref);
+    }
+}
+
 libab_result libab_table_put(libab_table* table, const char* string,
                              libab_table_entry* entry) {
     return libab_trie_put(&table->trie, string, entry);
@@ -103,5 +120,7 @@ void libab_table_entry_free(libab_table_entry* entry) {
         libab_function_free(&entry->data_u.function);
     } else if (entry->variant == ENTRY_BASETYPE) {
         libab_basetype_free(entry->data_u.basetype);
+    } else if (entry->variant == ENTRY_VALUE) {
+        libab_ref_free(&entry->data_u.value);
     }
 }