_TOUPPER(P)                                 POSIX Programmer's Manual                                _TOUPPER(P)

NAME

       _toupper - transliterate lowercase characters to uppercase

SYNOPSIS

       #include <ctype.h>

       int _toupper(int c);

DESCRIPTION

       The  _toupper()  macro shall be equivalent to toupper() except that the application shall ensure that the
       argument c is a lowercase letter.

RETURN VALUE

       Upon successful completion, _toupper() shall return the uppercase letter corresponding  to  the  argument
       passed.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       islower() , toupper() , the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc and The Open Group. In the event of any discrepancy between this version and the  original  IEEE  and
       The  Open  Group  Standard,  the  original  IEEE and The Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                           _TOUPPER(P)