add env functions

1 files changed, 16 insertions, 0 deletions

diff --git a/env.h b/env.h
new file mode 100644
index 0000000..6fcf8cc
--- /dev/null
+++ b/env.h
@@ -0,0 +1,16 @@
+#ifndef ENV_H
+#define ENV_H
+
+struct list;
+struct atom;
+
+struct list *env_new();
+struct atom *env_lookup(struct list *env, const char *symbol);
+struct list *env_extend(struct list *env, int count, ...); //const char *symbol, struct atom *value
+// struct list *env_extend_env(struct list *enva, struct list *envb);
+int env_set(struct list *env, const char *symbol,
+    struct atom *value);
+void env_free(struct list *env);
+struct list *env_clone(struct list *env);
+
+#endif