[Qemu-devel] [PATCH 18/20] char: Convert qemu_chr_info() to QObject

[Luiz Capitulino <lcapitulino@redhat.com>]

Each device is represented by a QDict. The returned QObject is a QList
of all devices.

This commit should not change user output.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 monitor.c   |    3 ++-
 qemu-char.c |   43 +++++++++++++++++++++++++++++++++++++++++--
 qemu-char.h |    4 +++-
 3 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/monitor.c b/monitor.c
index 5c092d0..a74578f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2356,7 +2356,8 @@ static const mon_cmd_t info_cmds[] = {
         .args_type  = "",
         .params     = "",
         .help       = "show the character devices",
-        .mhandler.info = qemu_chr_info,
+        .user_print = qemu_chr_info_print,
+        .mhandler.info_new = qemu_chr_info,
     },
     {
         .name       = "block",
diff --git a/qemu-char.c b/qemu-char.c
index da5c15c..c0d1cb0 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -32,6 +32,7 @@
 #include "hw/usb.h"
 #include "hw/baum.h"
 #include "hw/msmouse.h"
+#include "qemu-objects.h"
 
 #include <unistd.h>
 #include <fcntl.h>
@@ -2469,13 +2470,51 @@ void qemu_chr_close(CharDriverState *chr)
     qemu_free(chr);
 }
 
-void qemu_chr_info(Monitor *mon)
+static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
 {
+    QDict *chr_dict;
+    Monitor *mon = opaque;
+
+    chr_dict = qobject_to_qdict(obj);
+    monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
+                                         qdict_get_str(chr_dict, "filename"));
+}
+
+void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
+{
+    qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
+}
+
+/**
+ * qemu_chr_info(): Character devices information
+ *
+ * Each device is represented by a QDict. The returned QObject is a QList
+ * of all devices.
+ *
+ * The QDict contains the following:
+ *
+ * - "label": device's label
+ * - "filename": device's file
+ *
+ * Example:
+ *
+ * [ { "label": "monitor", "filename", "stdio" },
+ *   { "label": "serial0", "filename": "vc" } ]
+ */
+void qemu_chr_info(Monitor *mon, QObject **ret_data)
+{
+    QList *chr_list;
     CharDriverState *chr;
 
+    chr_list = qlist_new();
+
     QTAILQ_FOREACH(chr, &chardevs, next) {
-        monitor_printf(mon, "%s: filename=%s\n", chr->label, chr->filename);
+        QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
+                                          chr->label, chr->filename);
+        qlist_append_obj(chr_list, obj);
     }
+
+    *ret_data = QOBJECT(chr_list);
 }
 
 CharDriverState *qemu_chr_find(const char *name)
diff --git a/qemu-char.h b/qemu-char.h
index 9957db1..48f54d8 100644
--- a/qemu-char.h
+++ b/qemu-char.h
@@ -5,6 +5,7 @@
 #include "qemu-queue.h"
 #include "qemu-option.h"
 #include "qemu-config.h"
+#include "qobject.h"
 
 /* character device */
 
@@ -87,7 +88,8 @@ int qemu_chr_can_read(CharDriverState *s);
 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len);
 int qemu_chr_get_msgfd(CharDriverState *s);
 void qemu_chr_accept_input(CharDriverState *s);
-void qemu_chr_info(Monitor *mon);
+void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);
+void qemu_chr_info(Monitor *mon, QObject **ret_data);
 CharDriverState *qemu_chr_find(const char *name);
 
 extern int term_escape_char;
-- 
1.6.6.rc1.39.g9a42