altos/scheme: Rename to 'scheme', clean up build

[fw/altos] / src / scheme / ao_scheme_cons.c

diff --git a/src/scheme/ao_scheme_cons.c b/src/scheme/ao_scheme_cons.c
new file mode 100644 (file)
index 0000000..03dad95
--- /dev/null
+++ b/src/scheme/ao_scheme_cons.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 GNU
+ * General Public License for more details.
+ */
+
+#include "ao_scheme.h"
+
+static void cons_mark(void *addr)
+{
+       struct ao_scheme_cons   *cons = addr;
+
+       for (;;) {
+               ao_poly cdr = cons->cdr;
+
+               ao_scheme_poly_mark(cons->car, 1);
+               if (!cdr)
+                       break;
+               if (ao_scheme_poly_type(cdr) != AO_SCHEME_CONS) {
+                       ao_scheme_poly_mark(cdr, 1);
+                       break;
+               }
+               cons = ao_scheme_poly_cons(cdr);
+               if (ao_scheme_mark_memory(&ao_scheme_cons_type, cons))
+                       break;
+       }
+}
+
+static int cons_size(void *addr)
+{
+       (void) addr;
+       return sizeof (struct ao_scheme_cons);
+}
+
+static void cons_move(void *addr)
+{
+       struct ao_scheme_cons   *cons = addr;
+
+       if (!cons)
+               return;
+
+       for (;;) {
+               ao_poly                 cdr;
+               struct ao_scheme_cons   *c;
+               int     ret;
+
+               MDBG_MOVE("cons_move start %d (%d, %d)\n",
+                         MDBG_OFFSET(cons), MDBG_OFFSET(ao_scheme_ref(cons->car)), MDBG_OFFSET(ao_scheme_ref(cons->cdr)));
+               (void) ao_scheme_poly_move(&cons->car, 1);
+               cdr = cons->cdr;
+               if (!cdr)
+                       break;
+               if (ao_scheme_poly_base_type(cdr) != AO_SCHEME_CONS) {
+                       (void) ao_scheme_poly_move(&cons->cdr, 0);
+                       break;
+               }
+               c = ao_scheme_poly_cons(cdr);
+               ret = ao_scheme_move_memory(&ao_scheme_cons_type, (void **) &c);
+               if (c != ao_scheme_poly_cons(cons->cdr))
+                       cons->cdr = ao_scheme_cons_poly(c);
+               MDBG_MOVE("cons_move end %d (%d, %d)\n",
+                         MDBG_OFFSET(cons), MDBG_OFFSET(ao_scheme_ref(cons->car)), MDBG_OFFSET(ao_scheme_ref(cons->cdr)));
+               if (ret)
+                       break;
+               cons = c;
+       }
+}
+
+const struct ao_scheme_type ao_scheme_cons_type = {
+       .mark = cons_mark,
+       .size = cons_size,
+       .move = cons_move,
+       .name = "cons",
+};
+
+struct ao_scheme_cons *ao_scheme_cons_free_list;
+
+struct ao_scheme_cons *
+ao_scheme_cons_cons(ao_poly car, ao_poly cdr)
+{
+       struct ao_scheme_cons   *cons;
+
+       if (ao_scheme_cons_free_list) {
+               cons = ao_scheme_cons_free_list;
+               ao_scheme_cons_free_list = ao_scheme_poly_cons(cons->cdr);
+       } else {
+               ao_scheme_poly_stash(0, car);
+               ao_scheme_poly_stash(1, cdr);
+               cons = ao_scheme_alloc(sizeof (struct ao_scheme_cons));
+               cdr = ao_scheme_poly_fetch(1);
+               car = ao_scheme_poly_fetch(0);
+               if (!cons)
+                       return NULL;
+       }
+       cons->car = car;
+       cons->cdr = cdr;
+       return cons;
+}
+
+struct ao_scheme_cons *
+ao_scheme_cons_cdr(struct ao_scheme_cons *cons)
+{
+       ao_poly cdr = cons->cdr;
+       if (cdr == AO_SCHEME_NIL)
+               return NULL;
+       if (ao_scheme_poly_type(cdr) != AO_SCHEME_CONS) {
+               (void) ao_scheme_error(AO_SCHEME_INVALID, "improper list");
+               return NULL;
+       }
+       return ao_scheme_poly_cons(cdr);
+}
+
+ao_poly
+ao_scheme__cons(ao_poly car, ao_poly cdr)
+{
+       return ao_scheme_cons_poly(ao_scheme_cons_cons(car, cdr));
+}
+
+void
+ao_scheme_cons_free(struct ao_scheme_cons *cons)
+{
+#if DBG_FREE_CONS
+       ao_scheme_cons_check(cons);
+#endif
+       while (cons) {
+               ao_poly cdr = cons->cdr;
+               cons->cdr = ao_scheme_cons_poly(ao_scheme_cons_free_list);
+               ao_scheme_cons_free_list = cons;
+               cons = ao_scheme_poly_cons(cdr);
+       }
+}
+
+void
+ao_scheme_cons_write(ao_poly c)
+{
+       struct ao_scheme_cons   *cons = ao_scheme_poly_cons(c);
+       ao_poly                 cdr;
+       int                     first = 1;
+
+       printf("(");
+       while (cons) {
+               if (!first)
+                       printf(" ");
+               ao_scheme_poly_write(cons->car);
+               cdr = cons->cdr;
+               if (cdr == c) {
+                       printf(" ...");
+                       break;
+               }
+               if (ao_scheme_poly_type(cdr) == AO_SCHEME_CONS) {
+                       cons = ao_scheme_poly_cons(cdr);
+                       first = 0;
+               } else {
+                       printf(" . ");
+                       ao_scheme_poly_write(cdr);
+                       cons = NULL;
+               }
+       }
+       printf(")");
+}
+
+void
+ao_scheme_cons_display(ao_poly c)
+{
+       struct ao_scheme_cons   *cons = ao_scheme_poly_cons(c);
+       ao_poly                 cdr;
+
+       while (cons) {
+               ao_scheme_poly_display(cons->car);
+               cdr = cons->cdr;
+               if (cdr == c) {
+                       printf("...");
+                       break;
+               }
+               if (ao_scheme_poly_type(cdr) == AO_SCHEME_CONS)
+                       cons = ao_scheme_poly_cons(cdr);
+               else {
+                       ao_scheme_poly_display(cdr);
+                       cons = NULL;
+               }
+       }
+}
+
+int
+ao_scheme_cons_length(struct ao_scheme_cons *cons)
+{
+       int     len = 0;
+       while (cons) {
+               len++;
+               cons = ao_scheme_poly_cons(cons->cdr);
+       }
+       return len;
+}