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author | Kevin Wolf <kwolf@redhat.com> | 2018-02-01 20:00:44 +0100 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2018-03-09 15:17:47 +0100 |
commit | bcebf102ccc3c6db327f341adc379fdf0673ca6b (patch) | |
tree | 56c08493a098807202128cf4d8205c258fc02b9f /qobject | |
parent | 37974a97d4d29229255b39ddd16c31743e1880ed (diff) | |
download | qemu-bcebf102ccc3c6db327f341adc379fdf0673ca6b.zip qemu-bcebf102ccc3c6db327f341adc379fdf0673ca6b.tar.gz qemu-bcebf102ccc3c6db327f341adc379fdf0673ca6b.tar.bz2 |
qdict: Introduce qdict_rename_keys()
A few block drivers will need to rename .bdrv_create options for their
QAPIfication, so let's have a helper function for that.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'qobject')
-rw-r--r-- | qobject/qdict.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/qobject/qdict.c b/qobject/qdict.c index 23df84f..229b8c8 100644 --- a/qobject/qdict.c +++ b/qobject/qdict.c @@ -1072,3 +1072,37 @@ void qdict_join(QDict *dest, QDict *src, bool overwrite) entry = next; } } + +/** + * qdict_rename_keys(): Rename keys in qdict according to the replacements + * specified in the array renames. The array must be terminated by an entry + * with from = NULL. + * + * The renames are performed individually in the order of the array, so entries + * may be renamed multiple times and may or may not conflict depending on the + * order of the renames array. + * + * Returns true for success, false in error cases. + */ +bool qdict_rename_keys(QDict *qdict, const QDictRenames *renames, Error **errp) +{ + QObject *qobj; + + while (renames->from) { + if (qdict_haskey(qdict, renames->from)) { + if (qdict_haskey(qdict, renames->to)) { + error_setg(errp, "'%s' and its alias '%s' can't be used at the " + "same time", renames->to, renames->from); + return false; + } + + qobj = qdict_get(qdict, renames->from); + qobject_incref(qobj); + qdict_put_obj(qdict, renames->to, qobj); + qdict_del(qdict, renames->from); + } + + renames++; + } + return true; +} |