[PATCH v2 4/9] vsprintf: Add scnprintf from kernel

[Markus Pargmann]

Signed-off-by: Markus Pargmann <mpa at pengutronix.de>
---
 include/stdio.h |  1 +
 lib/vsprintf.c  | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/stdio.h b/include/stdio.h
index f1909117621d..d0817bd0715a 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -13,6 +13,7 @@ void	serial_printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2
 
 int	sprintf(char *buf, const char *fmt, ...) __attribute__ ((format(__printf__, 2, 3)));
 int	snprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
+int	scnprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
 int	vsprintf(char *buf, const char *fmt, va_list args);
 char	*asprintf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
 char	*vasprintf(const char *fmt, va_list ap);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 800ded7939eb..9b8e8cf5f8e3 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -595,6 +595,30 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
 }
 EXPORT_SYMBOL(snprintf);
 
+/**
+ * scnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The return value is the number of characters written into @buf not including
+ * the trailing '\0'. If @size is == 0 the function returns 0.
+ */
+
+int scnprintf(char *buf, size_t size, const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i = vscnprintf(buf, size, fmt, args);
+	va_end(args);
+
+	return i;
+}
+EXPORT_SYMBOL(scnprintf);
+
 /* Simplified asprintf. */
 char *vasprintf(const char *fmt, va_list ap)
 {
-- 
2.6.2