add isl_union_pw_*_scale_val

[platform/upstream/isl.git] / isl_union_templ.c

diff --git a/isl_union_templ.c b/isl_union_templ.c
index cd55f4e..65ab08f 100644 (file)
--- a/isl_union_templ.c
+++ b/isl_union_templ.c
@@ -805,6 +805,70 @@ error:
        return NULL;
 }
 
+/* Multiply *entry by the isl_val "user".
+ *
+ * Return 0 on success and -1 on error.
+ */
+static int scale_val(void **entry, void *user)
+{
+       PW **pw = (PW **)entry;
+       isl_val *v = user;
+
+       *pw = FN(PW,scale_val)(*pw, isl_val_copy(v));
+       if (!*pw)
+               return -1;
+
+       return 0;
+}
+
+/* Multiply "u" by "v" and return the result.
+ */
+__isl_give UNION *FN(UNION,scale_val)(__isl_take UNION *u,
+       __isl_take isl_val *v)
+{
+       if (!u || !v)
+               goto error;
+       if (isl_val_is_one(v)) {
+               isl_val_free(v);
+               return u;
+       }
+
+       if (DEFAULT_IS_ZERO && u && isl_val_is_zero(v)) {
+               UNION *zero;
+               isl_space *space = FN(UNION,get_space)(u);
+#ifdef HAS_TYPE
+               zero = FN(UNION,ZERO)(space, u->type);
+#else
+               zero = FN(UNION,ZERO)(space);
+#endif
+               FN(UNION,free)(u);
+               isl_val_free(v);
+               return zero;
+       }
+
+       if (!isl_val_is_rat(v))
+               isl_die(isl_val_get_ctx(v), isl_error_invalid,
+                       "expecting rational factor", goto error);
+
+       u = FN(UNION,cow)(u);
+       if (!u)
+               return NULL;
+
+#ifdef HAS_TYPE
+       if (isl_val_is_neg(v))
+               u->type = isl_fold_type_negate(u->type);
+#endif
+       if (isl_hash_table_foreach(u->dim->ctx, &u->table, &scale_val, v) < 0)
+               goto error;
+
+       isl_val_free(v);
+       return u;
+error:
+       isl_val_free(v);
+       FN(UNION,free)(u);
+       return NULL;
+}
+
 S(UNION,plain_is_equal_data)
 {
        UNION *u2;