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author | Max Reitz <mreitz@redhat.com> | 2017-11-14 19:01:25 +0100 |
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committer | Max Reitz <mreitz@redhat.com> | 2017-11-17 18:21:30 +0100 |
commit | b38dd678a21582e03ecd2dec76ccf8290455628a (patch) | |
tree | 1076a9bc7235d44314418bb7ef140685692e999e /qobject/qobject.c | |
parent | 254bf807e5354c7b424d6fc28cb17c4f9ba43e35 (diff) | |
download | qemu-b38dd678a21582e03ecd2dec76ccf8290455628a.zip qemu-b38dd678a21582e03ecd2dec76ccf8290455628a.tar.gz qemu-b38dd678a21582e03ecd2dec76ccf8290455628a.tar.bz2 |
qapi: Add qobject_is_equal()
This generic function (along with its implementations for different
types) determines whether two QObjects are equal.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20171114180128.17076-4-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'qobject/qobject.c')
-rw-r--r-- | qobject/qobject.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/qobject/qobject.c b/qobject/qobject.c index b0cafb6..b2a5360 100644 --- a/qobject/qobject.c +++ b/qobject/qobject.c @@ -27,3 +27,32 @@ void qobject_destroy(QObject *obj) assert(QTYPE_QNULL < obj->type && obj->type < QTYPE__MAX); qdestroy[obj->type](obj); } + + +static bool (*qis_equal[QTYPE__MAX])(const QObject *, const QObject *) = { + [QTYPE_NONE] = NULL, /* No such object exists */ + [QTYPE_QNULL] = qnull_is_equal, + [QTYPE_QNUM] = qnum_is_equal, + [QTYPE_QSTRING] = qstring_is_equal, + [QTYPE_QDICT] = qdict_is_equal, + [QTYPE_QLIST] = qlist_is_equal, + [QTYPE_QBOOL] = qbool_is_equal, +}; + +bool qobject_is_equal(const QObject *x, const QObject *y) +{ + /* We cannot test x == y because an object does not need to be + * equal to itself (e.g. NaN floats are not). */ + + if (!x && !y) { + return true; + } + + if (!x || !y || x->type != y->type) { + return false; + } + + assert(QTYPE_NONE < x->type && x->type < QTYPE__MAX); + + return qis_equal[x->type](x, y); +} |