opensolaris man page for _toupper

_toupper(3C)						   Standard C Library Functions 					      _toupper(3C)

NAME
       _toupper - transliterate lower-case characters to upper-case

SYNOPSIS
       #include <ctype.h>

       int _toupper(int c);

DESCRIPTION
       The _toupper() macro is equivalent to toupper(3C) except that the argument c must be a lower-case letter.

RETURN VALUES
       On successful completion, _toupper() returns the upper-case letter corresponding to the argument passed.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       islower(3C), toupper(3C), attributes(5), standards(5)

SunOS 5.10							    24 Jul 2002 						      _toupper(3C)