diff options
author | Daniel P. Berrange <berrange@redhat.com> | 2017-02-03 12:06:48 +0000 |
---|---|---|
committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-02-09 17:28:49 +0100 |
commit | e998e2090fffe8083af381e41dc30a25e22fc28b (patch) | |
tree | 67055450f1dd10270b20e36c11766fa87a12e7ab /util/qemu-option.c | |
parent | 57a6d6d538c596292003d131035dc4f7cb44474d (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.c | 19 |
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(). |