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mbsinit(3posix)


NAME

   mbsinit --- determine conversion object status

SYNOPSIS

   #include <wchar.h>

   int mbsinit(const mbstate_t *ps);

DESCRIPTION

   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.12008
   defers to the ISO C standard.

   If  ps  is  not  a null pointer, the mbsinit() function shall determine
   whether the object pointed to by ps  describes  an  initial  conversion
   state.

RETURN VALUE

   The  mbsinit()  function shall return non-zero if ps is a null pointer,
   or if the pointed-to object  describes  an  initial  conversion  state;
   otherwise, it shall return zero.

   If  an mbstate_t object is altered by any of the functions described as
   ``restartable'', and is then used with a different character  sequence,
   or  in  the  other  conversion  direction, or with a different LC_CTYPE
   category setting than  on  earlier  function  calls,  the  behavior  is
   undefined.

ERRORS

   No errors are defined.

   The following sections are informative.

EXAMPLES

   None.

APPLICATION USAGE

   The  mbstate_t  object is used to describe the current conversion state
   from a particular character sequence to a wide-character  sequence  (or
   vice  versa)  under  the  rules of a particular setting of the LC_CTYPE
   category of the current locale.

   The initial conversion state corresponds, for a  conversion  in  either
   direction,  to the beginning of a new character sequence in the initial
   shift state. A zero valued mbstate_t object is  at  least  one  way  to
   describe  an  initial  conversion state. A zero valued mbstate_t object
   can be used to initiate conversion involving any character sequence, in
   any LC_CTYPE category setting.

RATIONALE

   None.

FUTURE DIRECTIONS

   None.

SEE ALSO

   mbrlen(), mbrtowc(), mbsrtowcs(), wcrtomb(), wcsrtombs()

   The Base Definitions volume of POSIX.12008, <wchar.h>

COPYRIGHT

   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 http://www.unix.org/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 .



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