towctrans_l(3p) — Linux manual page


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

PROLOG         top

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

NAME         top

       towctrans, towctrans_l — wide-character transliteration

SYNOPSIS         top

       #include <wctype.h>

       wint_t towctrans(wint_t wc, wctrans_t desc);
       wint_t towctrans_l(wint_t wc, wctrans_t desc,
           locale_t locale);

DESCRIPTION         top

       For towctrans(): The functionality described on this reference page
       is aligned with the ISO C standard. Any conflict between the
       requirements described here and the ISO C standard is unintentional.
       This volume of POSIX.1‐2008 defers to the ISO C standard.

       The towctrans() and towctrans_l() functions shall transliterate the
       wide-character code wc using the mapping described by desc.

       The current setting of the LC_CTYPE category in the current locale or
       in the locale represented by locale, respectively, should be the same
       as during the call to wctrans() or wctrans_l() that returned the
       value desc.

       If the value of desc is invalid (that is, not obtained by a call to
       wctrans() or desc is invalidated by a subsequent call to setlocale()
       that has affected category LC_CTYPE), the result is unspecified.

       If the value of desc is invalid (that is, not obtained by a call to
       wctrans_l() with the same locale object locale) the result is

       An application wishing to check for error situations should set errno
       to 0 before calling towctrans() or towctrans_l().

       If errno is non-zero on return, an error has occurred.

       The behavior is undefined if the locale argument to towctrans_l() is
       the special locale object LC_GLOBAL_LOCALE or is not a valid locale
       object handle.

RETURN VALUE         top

       If successful, the towctrans() and towctrans_l() functions shall
       return the mapped value of wc using the mapping described by desc.
       Otherwise, they shall return wc unchanged.

ERRORS         top

       These functions may fail if:

       EINVAL desc contains an invalid transliteration descriptor.

       The following sections are informative.

EXAMPLES         top



       The strings "tolower" and "toupper" are reserved for the standard
       mapping names. In the table below, the functions in the left column
       are equivalent to the functions in the right column.

           towlower(wc)            towctrans(wc, wctrans("tolower"))
           towlower_l(wc, locale)  towctrans_l(wc, wctrans("tolower"), locale)
           towupper(wc)            towctrans(wc, wctrans("toupper"))
           towupper_l(wc, locale)  towctrans_l(wc, wctrans("toupper"), locale)

RATIONALE         top




SEE ALSO         top

       towlower(3p), towupper(3p), wctrans(3p)

       The Base Definitions volume of POSIX.1‐2008, wctype.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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 original
       Standard can be obtained online at .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see .

IEEE/The Open Group                 2013                       TOWCTRANS(3P)