1WCTRANS(P)                 POSIX Programmer's Manual                WCTRANS(P)
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NAME

6       wctrans - define character mapping
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SYNOPSIS

9       #include <wctype.h>
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11       wctrans_t wctrans(const char *charclass);
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DESCRIPTION

15       The  wctrans()  function  is  defined for valid character mapping names
16       identified in the current locale. The charclass is a string identifying
17       a generic character mapping name for which codeset-specific information
18       is required. The following character mapping names are defined  in  all
19       locales: tolower and toupper.
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21       The  function shall return a value of type wctrans_t, which can be used
22       as the  second  argument  to  subsequent  calls  of  towctrans().   The
23       wctrans() function shall determine values of wctrans_t according to the
24       rules of the coded character set defined by character mapping  informa‐
25       tion  in the program's locale (category LC_CTYPE ). The values returned
26       by wctrans() shall be valid until a call to setlocale()  that  modifies
27       the category LC_CTYPE .
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RETURN VALUE

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

36       The wctrans() function may fail if:
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38       EINVAL The character mapping name pointed to by charclass is not  valid
39              in the current locale.
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42       The following sections are informative.
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EXAMPLES

45       None.
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APPLICATION USAGE

48       None.
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RATIONALE

51       None.
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FUTURE DIRECTIONS

54       None.
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SEE ALSO

57       towctrans()  ,  the  Base  Definitions  volume of IEEE Std 1003.1-2001,
58       <wctype.h>
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61       Portions of this text are reprinted and reproduced in  electronic  form
62       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
63       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
64       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
65       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
66       event of any discrepancy between this version and the original IEEE and
67       The Open Group Standard, the original IEEE and The Open Group  Standard
68       is  the  referee document. The original Standard can be obtained online
69       at http://www.opengroup.org/unix/online.html .
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73IEEE/The Open Group                  2003                           WCTRANS(P)
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