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authorDaniel P. Berrange <berrange@redhat.com>2017-02-03 12:06:48 +0000
committerGerd Hoffmann <kraxel@redhat.com>2017-02-09 17:28:49 +0100
commite998e2090fffe8083af381e41dc30a25e22fc28b (patch)
tree67055450f1dd10270b20e36c11766fa87a12e7ab /util/qemu-option.c
parent57a6d6d538c596292003d131035dc4f7cb44474d (diff)
util: add iterators for QemuOpts values
To iterate over all QemuOpts currently requires using a callback function which is inconvenient for control flow. Add support for using iterator functions more directly QemuOptsIter iter; QemuOpt *opt; qemu_opts_iter_init(&iter, opts, "repeated-key"); while ((opt = qemu_opts_iter_next(&iter)) != NULL) { ....do something... } Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170203120649.15637-8-berrange@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'util/qemu-option.c')
-rw-r--r--util/qemu-option.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 3467dc2397..d611946333 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -332,6 +332,25 @@ const char *qemu_opt_get(QemuOpts *opts, const char *name)
return opt ? opt->str : NULL;
}
+void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name)
+{
+ iter->opts = opts;
+ iter->opt = QTAILQ_FIRST(&opts->head);
+ iter->name = name;
+}
+
+const char *qemu_opt_iter_next(QemuOptsIter *iter)
+{
+ QemuOpt *ret = iter->opt;
+ if (iter->name) {
+ while (ret && !g_str_equal(iter->name, ret->name)) {
+ ret = QTAILQ_NEXT(ret, next);
+ }
+ }
+ iter->opt = ret ? QTAILQ_NEXT(ret, next) : NULL;
+ return ret ? ret->str : NULL;
+}
+
/* Get a known option (or its default) and remove it from the list
* all in one action. Return a malloced string of the option value.
* Result must be freed by caller with g_free().