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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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TOWCTRANS(3P) POSIX Programmer's Manual TOWCTRANS(3P)
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.
towctrans, towctrans_l — wide-character transliteration
#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);
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.1‐2017 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
unspecified.
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.
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.
These functions may fail if:
EINVAL desc contains an invalid transliteration descriptor.
The following sections are informative.
None.
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)
None.
None.
towlower(3p), towupper(3p), wctrans(3p)
The Base Definitions volume of POSIX.1‐2017, wctype.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
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
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 TOWCTRANS(3P)
Pages that refer to this page: wctype.h(0p), wctrans(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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