diff options
Diffstat (limited to 'mdk-stage1/dietlibc/lib/toupper.c')
-rw-r--r-- | mdk-stage1/dietlibc/lib/toupper.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mdk-stage1/dietlibc/lib/toupper.c b/mdk-stage1/dietlibc/lib/toupper.c index c048e60bb..f7d415e95 100644 --- a/mdk-stage1/dietlibc/lib/toupper.c +++ b/mdk-stage1/dietlibc/lib/toupper.c @@ -1,6 +1,8 @@ #include <ctype.h> -inline int toupper(int c) { - return (c>='a' && c<='z')?c-'a'+'A':c; +inline int toupper(int ch) { + if ( (unsigned int)(ch - 'a') < 26u ) + ch += 'A' - 'a'; + return ch; } |