[PULL 11/53] qemu-option: Factor out helper opt_create()

[Markus Armbruster <armbru@redhat.com>]

There is just one use so far.  The next commit will add more.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200707160613.848843-12-armbru@redhat.com>
---
 util/qemu-option.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/util/qemu-option.c b/util/qemu-option.c
index e7b540a21b..1023fe7527 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -499,6 +499,23 @@ int qemu_opt_unset(QemuOpts *opts, const char *name)
     }
 }
 
+static QemuOpt *opt_create(QemuOpts *opts, const char *name, char *value,
+                           bool prepend)
+{
+    QemuOpt *opt = g_malloc0(sizeof(*opt));
+
+    opt->name = g_strdup(name);
+    opt->str = value;
+    opt->opts = opts;
+    if (prepend) {
+        QTAILQ_INSERT_HEAD(&opts->head, opt, next);
+    } else {
+        QTAILQ_INSERT_TAIL(&opts->head, opt, next);
+    }
+
+    return opt;
+}
+
 static void opt_set(QemuOpts *opts, const char *name, char *value,
                     bool prepend, bool *help_wanted, Error **errp)
 {
@@ -516,16 +533,8 @@ static void opt_set(QemuOpts *opts, const char *name, char *value,
         return;
     }
 
-    opt = g_malloc0(sizeof(*opt));
-    opt->name = g_strdup(name);
-    opt->opts = opts;
-    if (prepend) {
-        QTAILQ_INSERT_HEAD(&opts->head, opt, next);
-    } else {
-        QTAILQ_INSERT_TAIL(&opts->head, opt, next);
-    }
+    opt = opt_create(opts, name, value, prepend);
     opt->desc = desc;
-    opt->str = value;
     qemu_opt_parse(opt, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
-- 
2.26.2