From 5f3f35a2c29bd91c52d0470ba5a6beed8b6e4bed Mon Sep 17 00:00:00 2001
From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Fri, 24 Feb 2012 04:25:08 +0000
Subject: [PATCH] Mark getnextarg function as returning a borrowed reference

---
 psycopg/bytes_format.c | 1 +
 psycopg/config.h       | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/psycopg/bytes_format.c b/psycopg/bytes_format.c
index 1e729e49..b22422b0 100644
--- a/psycopg/bytes_format.c
+++ b/psycopg/bytes_format.c
@@ -86,6 +86,7 @@
 
 /* Helpers for formatstring */
 
+CPYCHECKER_RETURNS_BORROWED_REF
 Py_LOCAL_INLINE(PyObject *)
 getnextarg(PyObject *args, Py_ssize_t arglen, Py_ssize_t *p_argidx)
 {
diff --git a/psycopg/config.h b/psycopg/config.h
index 2112043b..321587a0 100644
--- a/psycopg/config.h
+++ b/psycopg/config.h
@@ -160,4 +160,12 @@ static double round(double num)
 #define isinf(x) (!finite((x)) && (x)==(x))
 #endif
 
+/* decorator for the gcc cpychecker plugin */
+#if defined(WITH_CPYCHECKER_RETURNS_BORROWED_REF_ATTRIBUTE)
+  #define CPYCHECKER_RETURNS_BORROWED_REF \
+    __attribute__((cpychecker_returns_borrowed_ref))
+#else
+  #define CPYCHECKER_RETURNS_BORROWED_REF
+#endif
+
 #endif /* !defined(PSYCOPG_CONFIG_H) */