From: Arnd Bergmann <a...@arndb.de>
gcc warns a few thousand times about the isdigit() shadow:
include/linux/ctype.h:26:19: warning: declaration of 'isdigit' shadows a
built-in function [-Wshadow]
As there is already a compiler builtin, just use that, and make
it clear we do that by defining a macro. Unfortunately, clang
does not have the isdigit() builtin, so this has to be conditional.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
include/linux/ctype.h | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/include/linux/ctype.h b/include/linux/ctype.h
index 363b004426db..c407acb258c2 100644
--- a/include/linux/ctype.h
+++ b/include/linux/ctype.h
@@ -23,10 +23,6 @@ extern const unsigned char _ctype[];
#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
-static inline int isdigit(int c)
-{
- return '0' <= c && c <= '9';
-}
#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
#define islower(c) ((__ismask(c)&(_L)) != 0)
#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
@@ -39,6 +35,18 @@ static inline int isdigit(int c)
#define isascii(c) (((unsigned char)(c))<=0x7f)
#define toascii(c) (((unsigned char)(c))&0x7f)
+#if defined __has_builtin
+#if __has_builtin(__builtin_isdigit)
+#define isdigit(ch) __builtin_isdigit(ch)
+#endif
+#endif
+#ifndef isdigit
+static inline int isdigit(int c)
+{
+ return '0' <= c && c <= '9';
+}
+#endif
+
static inline unsigned char __tolower(unsigned char c)
{
if (isupper(c))
--
2.27.0
