if (pos < 0)
goto error;
if (pos >= n) {
+ vars_drop(v, v->n - n);
isl_stream_error(s, tok, "unknown identifier");
goto error;
}
if (negate)
res = isl_map_subtract(isl_map_copy(map), res);
- while (isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
+ while (res && isl_stream_eat_if_available(s, ISL_TOKEN_AND)) {
isl_map *res_i;
negate = isl_stream_eat_if_available(s, ISL_TOKEN_NOT);
return pma;
}
+/* Read an isl_union_pw_multi_aff from "s".
+ * We currently read a generic object and if it turns out to be a set or
+ * a map, we convert that to an isl_union_pw_multi_aff.
+ * It would be more efficient if we were to construct
+ * the isl_union_pw_multi_aff directly.
+ */
+__isl_give isl_union_pw_multi_aff *isl_stream_read_union_pw_multi_aff(
+ struct isl_stream *s)
+{
+ struct isl_obj obj;
+
+ obj = obj_read(s);
+ if (!obj.v)
+ return NULL;
+
+ if (obj.type == isl_obj_map || obj.type == isl_obj_set)
+ obj = to_union(s->ctx, obj);
+ if (obj.type == isl_obj_union_map)
+ return isl_union_pw_multi_aff_from_union_map(obj.v);
+ if (obj.type == isl_obj_union_set)
+ return isl_union_pw_multi_aff_from_union_set(obj.v);
+
+ obj.type->free(obj.v);
+ isl_die(s->ctx, isl_error_invalid, "unexpected object type",
+ return NULL);
+}
+
+/* Read an isl_union_pw_multi_aff from "str".
+ */
+__isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_read_from_str(
+ isl_ctx *ctx, const char *str)
+{
+ isl_union_pw_multi_aff *upma;
+ struct isl_stream *s = isl_stream_new_str(ctx, str);
+ if (!s)
+ return NULL;
+ upma = isl_stream_read_union_pw_multi_aff(s);
+ isl_stream_free(s);
+ return upma;
+}
+
/* Assuming "pa" represents a single affine expression defined on a universe
* domain, extract this affine expression.
*/