1 files changed, 30 insertions, 0 deletions
diff --git a/src/env.h b/src/env.h
new file mode 100644
index 0000000..577133a
--- /dev/null
+++ b/src/env.h
@@ -0,0 +1,30 @@
+#ifndef ENV_H
+#define ENV_H
+
+// #include "value.h"
+typedef struct value * value_t;
+
+#include "hashtable.h"
+
+typedef struct symbol_table *env_t;
+#define ENV_EMPTY NULL
+
+typedef void (*env_destroy_func)(char *key, value_t value);
+
+struct symbol_table {
+    hashtable_t table;
+
+    struct symbol_table *parent;
+    size_t refs;
+
+    env_destroy_func destroy_func;
+};
+
+env_t env_create(env_t parent, env_destroy_func destroy_func);
+void env_destroy(env_t env);
+
+int env_insert(env_t env, value_t key, value_t data);
+int env_query (env_t env, value_t key, value_t *data);
+int env_delete(env_t env, value_t key);
+
+#endif