opensolaris man page for _tolower

_tolower(3C)						   Standard C Library Functions 					      _tolower(3C)

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

SYNOPSIS
       #include <ctype.h>

       int _tolower(int c);

DESCRIPTION
       The _tolower() macro is equivalent to tolower(3C) except that the argument c must be an upper-case letter.

RETURN VALUES
       On successful completion, _tolower() returns the lower-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
       isupper(3C), tolower(3C), attributes(5), standards(5)

SunOS 5.10							    24 Jul 2002 						      _tolower(3C)