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qapi: qobject input visitor variant for use with keyval_parse()

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Currently the QObjectInputVisitor assumes that all scalar values are
directly represented as the final types declared by the thing being
visited. i.e. it assumes an 'int' is using QInt, and a 'bool' is using
QBool, etc.  This is good when QObjectInputVisitor is fed a QObject
that came from a JSON document on the QMP monitor, as it will strictly
validate correctness.

To allow QObjectInputVisitor to be reused for visiting a QObject
originating from keyval_parse(), an alternative mode is needed where
all the scalars types are represented as QString and converted on the
fly to the final desired type.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1475246744-29302-8-git-send-email-berrange@redhat.com>

Rebased, conflicts resolved, commit message updated to refer to
keyval_parse().  autocast replaced by keyval in identifiers,
noautocast replaced by fail in tests.

Fix qobject_input_type_uint64_keyval() not to reject '-', for QemuOpts
compatibility: replace parse_uint_full() by open-coded
parse_option_number().  The next commit will add suitable tests.
Leave out the fancy ERANGE error reporting for now, but add a TODO
comment.  Add it qobject_input_type_int64_keyval() and
qobject_input_type_number_keyval(), too.

Open code parse_option_bool() and parse_option_size() so we have to
call qobject_input_get_name() only when actually needed.  Again, leave
out ERANGE error reporting for now.

QAPI/QMP downstream extension prefixes __RFQDN_ don't work, because
keyval_parse() splits them at '.'.  This will be addressed later in
the series.

qobject_input_type_int64_keyval(), qobject_input_type_uint64_keyval(),
qobject_input_type_number_keyval() tweaked for style.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <1488317230-26248-5-git-send-email-armbru@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-02-28 22:26:50 +01:00 • committed by Markus Armbruster
parent d454dbe0ee
commit cbd8acf38f
3 changed files with 358 additions and 5 deletions
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9
include/qapi/qobject-input-visitor.h
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@ -59,4 +59,13 @@ typedef struct QObjectInputVisitor QObjectInputVisitor;
*/
Visitor *qobject_input_visitor_new(QObject *obj);
/*
* Create a QObject input visitor for @obj for use with keyval_parse()
*
* This is like qobject_input_visitor_new(), except scalars are all
* QString, and error messages refer to parts of @obj in the syntax
* keyval_parse() uses for KEYs.
*/
Visitor *qobject_input_visitor_new_keyval(QObject *obj);
#endif