altos/scheme: Add ports. Split scheme code up.

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

diff --git a/src/scheme/ao_scheme_frame.c b/src/scheme/ao_scheme_frame.c
index 9ae5bb7293e95b09eeddf41e5534d7044be25880..e4da279bcd0b4fdfcfa88678b6206ddb78a21698 100644 (file)
--- a/src/scheme/ao_scheme_frame.c
+++ b/src/scheme/ao_scheme_frame.c
@@ -36,12 +36,12 @@ frame_vals_mark(void *addr)
        for (f = 0; f < vals->size; f++) {
                struct ao_scheme_val    *v = &vals->vals[f];
 
+               ao_scheme_poly_mark(v->atom, 0);
                ao_scheme_poly_mark(v->val, 0);
-               MDBG_MOVE("frame mark atom %s %d val %d at %d    ",
+               MDBG_MOVE("frame mark atom %s %d val %d at %d\n",
                          ao_scheme_poly_atom(v->atom)->name,
                          MDBG_OFFSET(ao_scheme_ref(v->atom)),
                          MDBG_OFFSET(ao_scheme_ref(v->val)), f);
-               MDBG_DO(printf("\n"));
        }
 }
 
@@ -140,16 +140,16 @@ const struct ao_scheme_type ao_scheme_frame_type = {
 int ao_scheme_frame_print_indent;
 
 static void
-ao_scheme_frame_indent(int extra)
+ao_scheme_frame_indent(FILE *out, int extra)
 {
        int                             i;
-       putchar('\n');
+       putc('\n', out);
        for (i = 0; i < ao_scheme_frame_print_indent+extra; i++)
-               putchar('\t');
+               putc('\t', out);
 }
 
 void
-ao_scheme_frame_write(ao_poly p, bool write)
+ao_scheme_frame_write(FILE *out, ao_poly p, bool write)
 {
        struct ao_scheme_frame          *frame = ao_scheme_poly_frame(p);
        struct ao_scheme_frame          *clear = frame;
@@ -161,23 +161,23 @@ ao_scheme_frame_write(ao_poly p, bool write)
                struct ao_scheme_frame_vals     *vals = ao_scheme_poly_frame_vals(frame->vals);
 
                if (written != 0)
-                       printf(", ");
+                       fputs(", ", out);
                if (ao_scheme_print_mark_addr(frame)) {
-                       printf("recurse...");
+                       fputs("recurse...", out);
                        break;
                }
 
-               putchar('{');
+               putc('{', out);
                written++;
                for (f = 0; f < frame->num; f++) {
-                       ao_scheme_frame_indent(1);
-                       ao_scheme_poly_write(vals->vals[f].atom, write);
-                       printf(" = ");
-                       ao_scheme_poly_write(vals->vals[f].val, write);
+                       ao_scheme_frame_indent(out, 1);
+                       ao_scheme_poly_write(out, vals->vals[f].atom, write);
+                       fputs(" = ", out);
+                       ao_scheme_poly_write(out, vals->vals[f].val, write);
                }
                frame = ao_scheme_poly_frame(frame->prev);
-               ao_scheme_frame_indent(0);
-               putchar('}');
+               ao_scheme_frame_indent(out, 0);
+               putc('}', out);
        }
        if (ao_scheme_print_stop()) {
                while (written--) {
@@ -345,6 +345,41 @@ ao_scheme_frame_add(struct ao_scheme_frame *frame, ao_poly atom, ao_poly val)
        return val;
 }
 
+#ifdef AO_SCHEME_FEATURE_UNDEF
+ao_poly
+ao_scheme_frame_del(struct ao_scheme_frame *frame, ao_poly atom)
+{
+       struct ao_scheme_frame_vals     *vals = ao_scheme_poly_frame_vals(frame->vals);
+       int                             l = ao_scheme_frame_find(frame, frame->num, atom);
+       int                             f = frame->num;
+       struct ao_scheme_frame          *moved_frame;
+
+       if (l >= frame->num)
+               return _ao_scheme_bool_false;
+
+       if (vals->vals[l].atom != atom)
+               return _ao_scheme_bool_false;
+
+       /* squash the deleted entry */
+       memmove(&vals->vals[l],
+               &vals->vals[l+1],
+               (f - l) * sizeof (struct ao_scheme_val));
+
+       /* allocate a smaller vals array */
+       ao_scheme_frame_stash(frame);
+       moved_frame = ao_scheme_frame_realloc(frame, f - 1);
+       frame = ao_scheme_frame_fetch();
+
+       /*
+        * We couldn't allocate a smaller frame, so just
+        * ignore the last value in the array
+        */
+       if (!moved_frame)
+               frame->num = f - 1;
+       return _ao_scheme_bool_true;
+}
+#endif
+
 struct ao_scheme_frame *ao_scheme_frame_global;
 struct ao_scheme_frame *ao_scheme_frame_current;