diff options
Diffstat (limited to 'mdk-stage1/dietlibc/lib/isalnum.c')
| -rw-r--r-- | mdk-stage1/dietlibc/lib/isalnum.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mdk-stage1/dietlibc/lib/isalnum.c b/mdk-stage1/dietlibc/lib/isalnum.c index 4d363fab9..3192cc20d 100644 --- a/mdk-stage1/dietlibc/lib/isalnum.c +++ b/mdk-stage1/dietlibc/lib/isalnum.c @@ -1,7 +1,9 @@ #include <ctype.h> -int __isalnum_ascii(int c) { - return isalpha(c) || isdigit(c); +int __isalnum_ascii ( int ch ); +int __isalnum_ascii ( int ch ) { + return (unsigned int)((ch | 0x20) - 'a') < 26u || + (unsigned int)( ch - '0') < 10u; } -int isalnum(int c) __attribute__((weak,alias("__isalnum_ascii"))); +int isalnum ( int ch ) __attribute__((weak,alias("__isalnum_ascii"))); |