Merge remote-tracking branch 'origin/master'

1 files changed, 64 insertions, 0 deletions

diff --git a/impl/constructor.c b/impl/constructor.c
new file mode 100644
index 0000000..4c8efa4
--- /dev/null
+++ b/impl/constructor.c
@@ -0,0 +1,64 @@
+/* Copyright (C) 2025 Aryadev Chavali
+
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the Unlicense for details.
+
+ * You may distribute and modify this code under the terms of the Unlicense,
+ * which you should have received a copy of along with this program.  If not,
+ * please go to <https://unlicense.org/>.
+
+ * Created: 2025-08-20
+ * Description: Lisp constructors/destructors
+ */
+
+#include <malloc.h>
+
+#include <alisp.h>
+
+lisp_t *make_int(i64 i)
+{
+  return tag_int(i);
+}
+
+lisp_t *cons(sys_t *sys, lisp_t *car, lisp_t *cdr)
+{
+  cons_t *cons = calloc(1, sizeof(*cons));
+  cons->car    = car;
+  cons->cdr    = cdr;
+
+  lisp_t *lcons = tag_cons(cons);
+  sys_register(sys, lcons);
+  return lcons;
+}
+
+lisp_t *make_vec(sys_t *sys, u64 capacity)
+{
+  vec_t *vec = calloc(1, sizeof(*vec));
+  vec_init(vec, capacity);
+  lisp_t *ptr = tag_vec(vec);
+  sys_register(sys, ptr);
+  return ptr;
+}
+
+lisp_t *intern(sys_t *sys, sv_t sv)
+{
+  char *str = sym_table_find(&sys->symtable, sv);
+  return tag_sym(str);
+}
+
+lisp_t *car(lisp_t *lsp)
+{
+  if (!IS_TAG(lsp, CONS))
+    return NIL;
+  else
+    return CAR(lsp);
+}
+
+lisp_t *cdr(lisp_t *lsp)
+{
+  if (!IS_TAG(lsp, CONS))
+    return NIL;
+  else
+    return CDR(lsp);
+}