1TOWCTRANS(3P)              POSIX Programmer's Manual             TOWCTRANS(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       towctrans - wide-character transliteration
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SYNOPSIS

15       #include <wctype.h>
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17       wint_t towctrans(wint_t wc, wctrans_t desc);
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DESCRIPTION

21       The towctrans() function shall transliterate the wide-character code wc
22       using  the  mapping  described  by  desc.  The  current  setting of the
23       LC_CTYPE category should be the same as during the  call  to  wctrans()
24       that  returned  the  value desc.  If the value of desc is invalid (that
25       is, not obtained by a call to wctrans() or desc  is  invalidated  by  a
26       subsequent  call  to setlocale() that has affected category LC_CTYPE ),
27       the result is unspecified.
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29       An application wishing to check for error situations should  set  errno
30       to  0  before  calling  towctrans(). If errno is non-zero on return, an
31       error has occurred.
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RETURN VALUE

34       If successful, the towctrans() function shall return the  mapped  value
35       of  wc  using the mapping described by desc. Otherwise, it shall return
36       wc unchanged.
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ERRORS

39       The towctrans() function may fail if:
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41       EINVAL desc contains an invalid transliteration descriptor.
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44       The following sections are informative.
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EXAMPLES

47       None.
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APPLICATION USAGE

50       The strings "tolower" and "toupper" are reserved for the standard  map‐
51       ping  names.  In  the table below, the functions in the left column are
52       equivalent to the functions in the right column.
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55              towlower(wc)    towctrans(wc, wctrans("tolower"))
56              towupper(wc)    towctrans(wc, wctrans("toupper"))
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RATIONALE

59       None.
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FUTURE DIRECTIONS

62       None.
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SEE ALSO

65       towlower(), towupper(),  wctrans(),  the  Base  Definitions  volume  of
66       IEEE Std 1003.1-2001, <wctype.h>
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69       Portions  of  this text are reprinted and reproduced in electronic form
70       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
71       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
72       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
73       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
74       event of any discrepancy between this version and the original IEEE and
75       The  Open Group Standard, the original IEEE and The Open Group Standard
76       is the referee document. The original Standard can be  obtained  online
77       at http://www.opengroup.org/unix/online.html .
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81IEEE/The Open Group                  2003                        TOWCTRANS(3P)
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