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

NAME
       wctrans - define character mapping

SYNOPSIS
       #include <wctype.h>

       wctrans_t wctrans(const char *charclass);

DESCRIPTION
       The wctrans() function is defined for valid character mapping names identified in the cur-
       rent locale. The charclass is a string identifying a generic character  mapping	name  for
       which  codeset-specific information is required. The following character mapping names are
       defined in all locales: tolower and toupper.

       The function shall return a value of type wctrans_t, which can be used as the second argu-
       ment to subsequent calls of towctrans().  The wctrans() function shall determine values of
       wctrans_t according to the rules of the coded character set defined by  character  mapping
       information in the program's locale (category LC_CTYPE ). The values returned by wctrans()
       shall be valid until a call to setlocale() that modifies the category LC_CTYPE .

RETURN VALUE
       The wctrans() function shall return 0	and may set errno to indicate the error   if  the
       given  character  mapping  name	is not valid for the current locale (category LC_CTYPE );
       otherwise, it shall return a non-zero object of type wctrans_t that can be used	in  calls
       to towctrans().

ERRORS
       The wctrans() function may fail if:

       EINVAL The  character  mapping  name  pointed  to by charclass is not valid in the current
	      locale.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       towctrans() , the Base Definitions volume of IEEE Std 1003.1-2001, <wctype.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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       WCTRANS(P)
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