From: Steve Sistare <steven.sistare@oracle.com>
Date: Tue, 27 Feb 2024 15:33:19 +0000 (+0100)
Subject: qapi: New QAPI_LIST_LENGTH()
X-Git-Tag: v9.0.0-rc0~34^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=745736ae0cbe48dd7d58456baf084dc106320a87;p=thirdparty%2Fqemu.git

qapi: New QAPI_LIST_LENGTH()

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20240227153321.467343-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---

diff --git a/include/qapi/util.h b/include/qapi/util.h
index 81a2b13a333..20dfea8a545 100644
--- a/include/qapi/util.h
+++ b/include/qapi/util.h
@@ -56,4 +56,17 @@ int parse_qapi_name(const char *name, bool complete);
     (tail) = &(*(tail))->next; \
 } while (0)
 
+/*
+ * For any GenericList @list, return its length.
+ */
+#define QAPI_LIST_LENGTH(list)                                      \
+    ({                                                              \
+        size_t _len = 0;                                            \
+        typeof(list) _tail;                                         \
+        for (_tail = list; _tail != NULL; _tail = _tail->next) {    \
+            _len++;                                                 \
+        }                                                           \
+        _len;                                                       \
+    })
+
 #endif