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block-qdict: Clean up qdict_crumple() a bit

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When you mix scalar and non-scalar keys, whether you get an "already
set as scalar" or an "already set as dict" error depends on qdict
iteration order.  Neither message makes much sense.  Replace by
""Cannot mix scalar and non-scalar keys".  This is similar to the
message we get for mixing list and non-list keys.

I find qdict_crumple()'s first loop hard to understand.  Rearrange it
and add a comment.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2018-06-14 21:14:37 +02:00 committed by Kevin Wolf
parent f1b34a248e
commit 3692b5d768
1 changed files with 19 additions and 19 deletions
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38
qobject/block-qdict.c
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@ -403,7 +403,7 @@ static int qdict_is_list(QDict *maybe_list, Error **errp)
QObject *qdict_crumple(const QDict *src, Error **errp)
{
const QDictEntry *ent;
QDict *two_level, *multi_level = NULL;
QDict *two_level, *multi_level = NULL, *child_dict;
QObject *dst = NULL, *child;
size_t i;
char *prefix = NULL;
@ -422,28 +422,28 @@ QObject *qdict_crumple(const QDict *src, Error **errp)
}
qdict_split_flat_key(ent->key, &prefix, &suffix);
child = qdict_get(two_level, prefix);
if (suffix) {
QDict *child_dict = qobject_to(QDict, child);
if (!child_dict) {
if (child) {
error_setg(errp, "Key %s prefix is already set as a scalar",
prefix);
goto error;
}
child_dict = qobject_to(QDict, child);
child_dict = qdict_new();
qdict_put_obj(two_level, prefix, QOBJECT(child_dict));
}
qdict_put_obj(child_dict, suffix, qobject_ref(ent->value));
} else {
if (child) {
error_setg(errp, "Key %s prefix is already set as a dict",
prefix);
if (child) {
/*
* If @child_dict, then all previous keys with this prefix
* had a suffix. If @suffix, this one has one as well,
* and we're good, else there's a clash.
*/
if (!child_dict || !suffix) {
error_setg(errp, "Cannot mix scalar and non-scalar keys");
goto error;
}
}
if (suffix) {
if (!child_dict) {
child_dict = qdict_new();
qdict_put(two_level, prefix, child_dict);
}
qdict_put_obj(child_dict, suffix, qobject_ref(ent->value));
} else {
qdict_put_obj(two_level, prefix, qobject_ref(ent->value));
}