CTYPE(3)                  OpenBSD Programmer's Manual                 CTYPE(3)

NAME
     ctype - character classification macros

SYNOPSIS
     #include <ctype.h>

     int
     isalpha(int c);

     int
     isupper(int c);

     int
     islower(int c);

     int
     isdigit(int c);

     int
     isxdigit(int c);

     int
     isalnum(int c);

     int
     isspace(int c);

     int
     ispunct(int c);

     int
     isprint(int c);

     int
     isgraph(int c);

     int
     iscntrl(int c);

     int
     isblank(int c);

     int
     isascii(int c);

     int
     toupper(int c);

     int
     tolower(int c);

     int
     toascii(int c);

DESCRIPTION
     The above macros perform character tests and conversions on the integer
     c.

     See each function's own manual page for more information.

SEE ALSO
     isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
     isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3),
     isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

STANDARDS
     These functions, with the exception of isblank() and toascii(), conform
     to ANSI X3.159-1989 (``ANSI C'').

OpenBSD 4.9                      May 31, 2007                      OpenBSD 4.9