The new modes are equal-rank, exclusive sub-modes of LM_IN_PROGRESS. Teach
opts_next_list(), opts_type_int() and opts_type_uint64() to handle them.
Also enumerate explicitly what functions are valid to call in what modes:
- opts_next_list() is valid to call while flattening a range,
- opts_end_list(): ditto,
- lookup_scalar() is invalid to call during flattening; generated qapi
traversal code must continue asking for the same kind of signed/unsigned
list element until the interval is fully flattened,
- processed(): ditto.
List mode restrictions are always formulated in positive / inclusive
sense. The restrictions for lookup_scalar() and processed() are
automatically satisfied by current qapi traversals if the schema to build
is compatible with OptsVisitor.
The new list modes are not entered yet.
Signed-off-by: Laszlo Ersek <ler...@redhat.com>
---
qapi/opts-visitor.c | 44 ++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index ab9a602..e8e317f 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -22,7 +22,9 @@ enum ListMode
{
LM_NONE, /* not traversing a list of repeated options */
LM_STARTED, /* opts_start_list() succeeded */
- LM_IN_PROGRESS /* opts_next_list() has been called */
+ LM_IN_PROGRESS, /* opts_next_list() has been called */
+ LM_SIGNED_INTERVAL, /* flattening an interval with signed bounds */
+ LM_UNSIGNED_INTERVAL /* flattening an interval with unsigned bounds */
};
typedef enum ListMode ListMode;
@@ -47,6 +49,15 @@ struct OptsVisitor
ListMode list_mode;
GQueue *repeated_opts;
+ /* When parsing a list of repeating options as integers, values of the form
+ * "a-b", representing a closed interval, are allowed. Elements in the
+ * range are generated individually.
+ */
+ union {
+ int64_t s;
+ uint64_t u;
+ } range_next, range_limit;
+
/* If "opts_root->id" is set, reinstantiate it as a fake QemuOpt for
* uniformity. Only its "name" and "str" fields are set. "fake_id_opt" does
* not survive or escape the OptsVisitor object.
@@ -185,6 +196,22 @@ opts_next_list(Visitor *v, GenericList **list, Error
**errp)
link = list;
break;
+ case LM_SIGNED_INTERVAL:
+ case LM_UNSIGNED_INTERVAL:
+ link = &(*list)->next;
+
+ if (ov->list_mode == LM_SIGNED_INTERVAL) {
+ if (ov->range_next.s < ov->range_limit.s) {
+ ++ov->range_next.s;
+ break;
+ }
+ } else if (ov->range_next.u < ov->range_limit.u) {
+ ++ov->range_next.u;
+ break;
+ }
+ ov->list_mode = LM_IN_PROGRESS;
+ /* range has been completed, fall through in order to pop option */
+
case LM_IN_PROGRESS: {
const QemuOpt *opt;
@@ -211,7 +238,10 @@ opts_end_list(Visitor *v, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
- assert(ov->list_mode == LM_STARTED || ov->list_mode == LM_IN_PROGRESS);
+ assert(ov->list_mode == LM_STARTED ||
+ ov->list_mode == LM_IN_PROGRESS ||
+ ov->list_mode == LM_SIGNED_INTERVAL ||
+ ov->list_mode == LM_UNSIGNED_INTERVAL);
ov->repeated_opts = NULL;
ov->list_mode = LM_NONE;
}
@@ -303,6 +333,11 @@ opts_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
long long val;
char *endptr;
+ if (ov->list_mode == LM_SIGNED_INTERVAL) {
+ *obj = ov->range_next.s;
+ return;
+ }
+
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
@@ -328,6 +363,11 @@ opts_type_uint64(Visitor *v, uint64_t *obj, const char
*name, Error **errp)
const QemuOpt *opt;
const char *str;
+ if (ov->list_mode == LM_UNSIGNED_INTERVAL) {
+ *obj = ov->range_next.u;
+ return;
+ }
+
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
--
1.7.1
