stdlib.h: Add strlen implementation

While gnu-efi provides a strlen implementation for Unicode strings, we
also need one for char *.

Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/stdlib.h b/stdlib.h
index de4f7e8..b44bef0 100644
--- a/stdlib.h
+++ b/stdlib.h
@@ -20,4 +20,16 @@ static inline void memcpy(char *dst, char *src, UINTN size)
 		*dst++ = *src++;
 }
 
+static inline int strlen(char *str)
+{
+	int len;
+
+	len = 0;
+	while (*str++)
+		len++;
+
+	return len;
+}
+
+
 #endif /* __STDLIB_H__ */