diff options
Diffstat (limited to 'newlib/libc/ctype/isalnum.c')
| -rw-r--r-- | newlib/libc/ctype/isalnum.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/newlib/libc/ctype/isalnum.c b/newlib/libc/ctype/isalnum.c index 3fd5f9515..8bc2897c9 100644 --- a/newlib/libc/ctype/isalnum.c +++ b/newlib/libc/ctype/isalnum.c @@ -18,7 +18,7 @@ DESCRIPTION <<isalnum>> is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero for alphabetic or numeric ASCII characters, and <<0>> for other arguments. It is defined -for all integer values. +only if <[c]> is representable as an unsigned char or if <[c]> is EOF. You can use a compiled subroutine instead of the macro definition by undefining the macro using `<<#undef isalnum>>'. |