Update <qapi/qmp/qdict.h>
+ Update <qapi/qjson.h>
Change-Id: Idf7b9603edd8dadee05bbaa00af7c504c102fe81
diff --git a/include/qapi/qmp/qdict.h b/include/qapi/qmp/qdict.h
index 5cefd80..1ddf97b 100644
--- a/include/qapi/qmp/qdict.h
+++ b/include/qapi/qmp/qdict.h
@@ -68,5 +68,6 @@
void qdict_flatten(QDict *qdict);
void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start);
+void qdict_array_split(QDict *src, QList **dst);
#endif /* QDICT_H */
diff --git a/include/qapi/qmp/qjson.h b/include/qapi/qmp/qjson.h
index 73351ed..ee4d31a 100644
--- a/include/qapi/qmp/qjson.h
+++ b/include/qapi/qmp/qjson.h
@@ -19,7 +19,7 @@
#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qstring.h"
-QObject *qobject_from_json(const char *string) GCC_FMT_ATTR(1, 0);
+QObject *qobject_from_json(const char *string);
QObject *qobject_from_jsonf(const char *string, ...) GCC_FMT_ATTR(1, 2);
QObject *qobject_from_jsonv(const char *string, va_list *ap) GCC_FMT_ATTR(1, 0);
diff --git a/qobject/qdict.c b/qobject/qdict.c
index 17e14f0..66e04c6 100644
--- a/qobject/qdict.c
+++ b/qobject/qdict.c
@@ -477,7 +477,43 @@
g_free(qdict);
}
-static void qdict_do_flatten(QDict *qdict, QDict *target, const char *prefix)
+static void qdict_flatten_qdict(QDict *qdict, QDict *target,
+ const char *prefix);
+
+static void qdict_flatten_qlist(QList *qlist, QDict *target, const char *prefix)
+{
+ QObject *value;
+ const QListEntry *entry;
+ char *new_key;
+ int i;
+
+ /* This function is never called with prefix == NULL, i.e., it is always
+ * called from within qdict_flatten_q(list|dict)(). Therefore, it does not
+ * need to remove list entries during the iteration (the whole list will be
+ * deleted eventually anyway from qdict_flatten_qdict()). */
+ assert(prefix);
+
+ entry = qlist_first(qlist);
+
+ for (i = 0; entry; entry = qlist_next(entry), i++) {
+ value = qlist_entry_obj(entry);
+ new_key = g_strdup_printf("%s.%i", prefix, i);
+
+ if (qobject_type(value) == QTYPE_QDICT) {
+ qdict_flatten_qdict(qobject_to_qdict(value), target, new_key);
+ } else if (qobject_type(value) == QTYPE_QLIST) {
+ qdict_flatten_qlist(qobject_to_qlist(value), target, new_key);
+ } else {
+ /* All other types are moved to the target unchanged. */
+ qobject_incref(value);
+ qdict_put_obj(target, new_key, value);
+ }
+
+ g_free(new_key);
+ }
+}
+
+static void qdict_flatten_qdict(QDict *qdict, QDict *target, const char *prefix)
{
QObject *value;
const QDictEntry *entry, *next;
@@ -500,7 +536,11 @@
if (qobject_type(value) == QTYPE_QDICT) {
/* Entries of QDicts are processed recursively, the QDict object
* itself disappears. */
- qdict_do_flatten(qobject_to_qdict(value), target,
+ qdict_flatten_qdict(qobject_to_qdict(value), target,
+ new_key ? new_key : entry->key);
+ delete = true;
+ } else if (qobject_type(value) == QTYPE_QLIST) {
+ qdict_flatten_qlist(qobject_to_qlist(value), target,
new_key ? new_key : entry->key);
delete = true;
} else if (prefix) {
@@ -526,12 +566,14 @@
/**
* qdict_flatten(): For each nested QDict with key x, all fields with key y
- * are moved to this QDict and their key is renamed to "x.y". This operation
- * is applied recursively for nested QDicts.
+ * are moved to this QDict and their key is renamed to "x.y". For each nested
+ * QList with key x, the field at index y is moved to this QDict with the key
+ * "x.y" (i.e., the reverse of what qdict_array_split() does).
+ * This operation is applied recursively for nested QDicts and QLists.
*/
void qdict_flatten(QDict *qdict)
{
- qdict_do_flatten(qdict, qdict, NULL);
+ qdict_flatten_qdict(qdict, qdict, NULL);
}
/* extract all the src QDict entries starting by start into dst */
@@ -554,3 +596,72 @@
entry = next;
}
}
+
+static bool qdict_has_prefixed_entries(const QDict *src, const char *start)
+{
+ const QDictEntry *entry;
+
+ for (entry = qdict_first(src); entry; entry = qdict_next(src, entry)) {
+ if (strstart(entry->key, start, NULL)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/**
+ * qdict_array_split(): This function moves array-like elements of a QDict into
+ * a new QList. Every entry in the original QDict with a key "%u" or one
+ * prefixed "%u.", where %u designates an unsigned integer starting at 0 and
+ * incrementally counting up, will be moved to a new QDict at index %u in the
+ * output QList with the key prefix removed, if that prefix is "%u.". If the
+ * whole key is just "%u", the whole QObject will be moved unchanged without
+ * creating a new QDict. The function terminates when there is no entry in the
+ * QDict with a prefix directly (incrementally) following the last one; it also
+ * returns if there are both entries with "%u" and "%u." for the same index %u.
+ * Example: {"0.a": 42, "0.b": 23, "1.x": 0, "4.y": 1, "o.o": 7, "2": 66}
+ * (or {"1.x": 0, "4.y": 1, "0.a": 42, "o.o": 7, "0.b": 23, "2": 66})
+ * => [{"a": 42, "b": 23}, {"x": 0}, 66]
+ * and {"4.y": 1, "o.o": 7} (remainder of the old QDict)
+ */
+void qdict_array_split(QDict *src, QList **dst)
+{
+ unsigned i;
+
+ *dst = qlist_new();
+
+ for (i = 0; i < UINT_MAX; i++) {
+ QObject *subqobj;
+ bool is_subqdict;
+ QDict *subqdict;
+ char indexstr[32], prefix[32];
+ size_t snprintf_ret;
+
+ snprintf_ret = snprintf(indexstr, 32, "%u", i);
+ assert(snprintf_ret < 32);
+
+ subqobj = qdict_get(src, indexstr);
+
+ snprintf_ret = snprintf(prefix, 32, "%u.", i);
+ assert(snprintf_ret < 32);
+
+ is_subqdict = qdict_has_prefixed_entries(src, prefix);
+
+ // There may be either a single subordinate object (named "%u") or
+ // multiple objects (each with a key prefixed "%u."), but not both.
+ if (!subqobj == !is_subqdict) {
+ break;
+ }
+
+ if (is_subqdict) {
+ qdict_extract_subqdict(src, &subqdict, prefix);
+ assert(qdict_size(subqdict) > 0);
+ } else {
+ qobject_incref(subqobj);
+ qdict_del(src, indexstr);
+ }
+
+ qlist_append_obj(*dst, subqobj ?: QOBJECT(subqdict));
+ }
+}
