diff options
| -rw-r--r-- | include/qapi/qmp/qdict.h | 3 | ||||
| -rw-r--r-- | qobject/qdict.c | 32 |
2 files changed, 35 insertions, 0 deletions
diff --git a/include/qapi/qmp/qdict.h b/include/qapi/qmp/qdict.h index 1ddf97b1c3..d68f4eb4d5 100644 --- a/include/qapi/qmp/qdict.h +++ b/include/qapi/qmp/qdict.h @@ -16,6 +16,7 @@ #include "qapi/qmp/qobject.h" #include "qapi/qmp/qlist.h" #include "qemu/queue.h" +#include <stdbool.h> #include <stdint.h> #define QDICT_BUCKET_MAX 512 @@ -70,4 +71,6 @@ void qdict_flatten(QDict *qdict); void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start); void qdict_array_split(QDict *src, QList **dst); +void qdict_join(QDict *dest, QDict *src, bool overwrite); + #endif /* QDICT_H */ diff --git a/qobject/qdict.c b/qobject/qdict.c index 42ec4c0d2c..ea239f082e 100644 --- a/qobject/qdict.c +++ b/qobject/qdict.c @@ -665,3 +665,35 @@ void qdict_array_split(QDict *src, QList **dst) qlist_append_obj(*dst, subqobj ?: QOBJECT(subqdict)); } } + +/** + * qdict_join(): Absorb the src QDict into the dest QDict, that is, move all + * elements from src to dest. + * + * If an element from src has a key already present in dest, it will not be + * moved unless overwrite is true. + * + * If overwrite is true, the conflicting values in dest will be discarded and + * replaced by the corresponding values from src. + * + * Therefore, with overwrite being true, the src QDict will always be empty when + * this function returns. If overwrite is false, the src QDict will be empty + * iff there were no conflicts. + */ +void qdict_join(QDict *dest, QDict *src, bool overwrite) +{ + const QDictEntry *entry, *next; + + entry = qdict_first(src); + while (entry) { + next = qdict_next(src, entry); + + if (overwrite || !qdict_haskey(dest, entry->key)) { + qobject_incref(entry->value); + qdict_put_obj(dest, entry->key, entry->value); + qdict_del(src, entry->key); + } + + entry = next; + } +} |