From b3affb29cff0b16e24a53e0b629daffb597c499c Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@kernel.org>
Date: Mon, 29 Jan 2024 13:43:07 +0100
Subject: [PATCH] lib/string/strftime.[ch]: STRFTIME(): Add macro

This macro makes sure that the first argument is an array, and
calculates its size.

Reviewed-by: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 lib/Makefile.am       |  2 ++
 lib/string/strftime.c |  7 +++++++
 lib/string/strftime.h | 19 +++++++++++++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 lib/string/strftime.c
 create mode 100644 lib/string/strftime.h

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 58d9c142..0aa9d5ec 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -149,6 +149,8 @@ libshadow_la_SOURCES = \
 	string/stpecpy.h \
 	string/stpeprintf.c \
 	string/stpeprintf.h \
+	string/strftime.c \
+	string/strftime.h \
 	string/strncpy.h \
 	string/strtcpy.c \
 	string/strtcpy.h \
diff --git a/lib/string/strftime.c b/lib/string/strftime.c
new file mode 100644
index 00000000..ea1deb3f
--- /dev/null
+++ b/lib/string/strftime.c
@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "strftime.h"
diff --git a/lib/string/strftime.h b/lib/string/strftime.h
new file mode 100644
index 00000000..bebb31a4
--- /dev/null
+++ b/lib/string/strftime.h
@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRFTIME_H_
+#define SHADOW_INCLUDE_LIB_STRFTIME_H_
+
+
+#include <config.h>
+
+#include <time.h>
+
+#include "sizeof.h"
+
+
+#define STRFTIME(dst, fmt, ...)  strftime(dst, NITEMS(dst), fmt, __VA_ARGS__)
+
+
+#endif  // include guard