From 13142dc7f38e6b148efadc97edffca8664b9cde7 Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Wed, 20 Aug 2025 22:43:23 +0100
Subject: refactor lisp runtime to use vec_t* instead of ivec_t*

bit nicer to look at, should have about the same painful performance
hit anyway.
---
 alisp.h       | 14 +++++---------
 constructor.c |  6 +++---
 sys.c         |  6 +++---
 tag.c         | 12 ++++--------
 4 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/alisp.h b/alisp.h
index fe24c74..bf12784 100644
--- a/alisp.h
+++ b/alisp.h
@@ -53,7 +53,9 @@ typedef struct Vector
   void *data;
 } vec_t;
 
-#define VEC_MULT 2
+#define VEC_MULT             2
+#define VEC_DEFAULT_CAPACITY 8
+
 void vec_free(vec_t *);
 void vec_ensure_free(vec_t *, u64);
 void vec_append(vec_t *, void *, u64);
@@ -103,12 +105,6 @@ typedef struct
   lisp_t *car, *cdr;
 } cons_t;
 
-typedef struct
-{
-  // 2 levels of indirection... disgusting
-  void *data;
-} lvec_t;
-
 /// System context - essentially something to help with system management
 typedef struct
 {
@@ -129,7 +125,7 @@ lisp_t *cons(sys_t *, lisp_t *, lisp_t *);
 i64 as_int(lisp_t *);
 sv_t *as_sym(lisp_t *);
 cons_t *as_cons(lisp_t *);
-void *as_vec(lisp_t *);
+vec_t *as_vec(lisp_t *);
 
 #define CAR(L) (as_cons(L)->car)
 #define CDR(L) (as_cons(L)->cdr)
@@ -174,6 +170,6 @@ tag_t get_tag(lisp_t *);
 lisp_t *tag_int(i64);
 lisp_t *tag_sym(sv_t *);
 lisp_t *tag_cons(cons_t *);
-lisp_t *tag_vec(lvec_t *);
+lisp_t *tag_vec(vec_t *);
 
 #endif
diff --git a/constructor.c b/constructor.c
index a20e66a..910ed2a 100644
--- a/constructor.c
+++ b/constructor.c
@@ -34,9 +34,9 @@ lisp_t *cons(sys_t *sys, lisp_t *car, lisp_t *cdr)
 
 lisp_t *make_vec(sys_t *sys, u64 capacity)
 {
-  lvec_t *lvec = calloc(1, sizeof(*lvec));
-  ivec_make(&lvec->data, capacity);
-  lisp_t *ptr = tag_vec(lvec);
+  vec_t *vec = calloc(1, sizeof(*vec));
+  vec_ensure_free(vec, MAX(capacity, VEC_DEFAULT_CAPACITY));
+  lisp_t *ptr = tag_vec(vec);
   sys_register(sys, ptr);
   return ptr;
 }
diff --git a/sys.c b/sys.c
index 195b2a1..d3a9bb2 100644
--- a/sys.c
+++ b/sys.c
@@ -57,9 +57,9 @@ void sys_cleanup(sys_t *sys)
       break;
     case TAG_VEC:
     {
-      lvec_t *lvec = as_vec(allocated);
-      ivec_free(&lvec->data);
-      free(lvec);
+      vec_t *vec = as_vec(allocated);
+      vec_free(vec);
+      free(vec);
       break;
     }
     case TAG_NIL:
diff --git a/tag.c b/tag.c
index f5338d6..874d532 100644
--- a/tag.c
+++ b/tag.c
@@ -27,9 +27,9 @@ lisp_t *tag_sym(sv_t *str)
   return TAG((u64)str, SYM);
 }
 
-lisp_t *tag_vec(lvec_t *lvec)
+lisp_t *tag_vec(vec_t *vec)
 {
-  return TAG((u64)lvec, VEC);
+  return TAG((u64)vec, VEC);
 }
 
 lisp_t *tag_cons(cons_t *cons)
@@ -69,12 +69,8 @@ cons_t *as_cons(lisp_t *obj)
   return (cons_t *)UNTAG(obj, CONS);
 }
 
-void *as_vec(lisp_t *obj)
+vec_t *as_vec(lisp_t *obj)
 {
   assert(IS_TAG(obj, VEC));
-  lvec_t *vec = (lvec_t *)UNTAG(obj, VEC);
-  if (vec)
-    return vec->data;
-  else
-    return NULL;
+  return (vec_t *)UNTAG(obj, VEC);
 }
-- 
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