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Re: [Qemu-devel] [PATCH v3 04/21] qapi: extend qdict_flatten() for QList


From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH v3 04/21] qapi: extend qdict_flatten() for QLists
Date: Thu, 12 Dec 2013 14:21:25 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.1

On 2013年12月12日 02:10, Max Reitz wrote:
Reversing qdict_array_split(), qdict_flatten() should flatten QLists as
well by interpreting them as QDicts where every entry's key is its
index.

This allows bringing QDicts with QLists from QMP commands to the same
form as they would be given as command-line options, thereby allowing
them to be parsed the same way.

Signed-off-by: Max Reitz <address@hidden>
---
  qobject/qdict.c | 45 +++++++++++++++++++++++++++++++++++++++++----
  1 file changed, 41 insertions(+), 4 deletions(-)

diff --git a/qobject/qdict.c b/qobject/qdict.c
index fca1902..d7ce4b3 100644
--- a/qobject/qdict.c
+++ b/qobject/qdict.c
@@ -477,7 +477,40 @@ static void qdict_destroy_obj(QObject *obj)
      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()). Also, prefix can
+     * never be NULL. */
+
+    entry = qlist_first(qlist);
+
+    for (i = 0; entry; entry = qlist_next(entry), i++) {
+        value = qlist_entry_obj(entry);
+
+        qobject_incref(value);
+        new_key = g_strdup_printf("%s.%i", prefix, i);
+        qdict_put_obj(target, new_key, value);
+
+        if (qobject_type(value) == QTYPE_QDICT) {
+            qdict_flatten_qdict(qobject_to_qdict(value), target, new_key);
+        } else {
+            qdict_flatten_qlist(qobject_to_qlist(value), target, new_key);
+        }
+    }
+}
+
+static void qdict_flatten_qdict(QDict *qdict, QDict *target, const char 
*prefix)

Sorry for replying twice on the same patch. But it would be nice if you could add a few comments on this function with some examples, as you did with qdict_array_split, I appreciated that. :)

Fam




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