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mbsrtowcs (3)
  • mbsrtowcs (3) ( Solaris man: Библиотечные вызовы )
  • mbsrtowcs (3) ( FreeBSD man: Библиотечные вызовы )
  • mbsrtowcs (3) ( Русские man: Библиотечные вызовы )
  • >> mbsrtowcs (3) ( Linux man: Библиотечные вызовы )
  • mbsrtowcs (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    mbsrtowcs - convert a multibyte string to a wide-character string
     
    

    SYNOPSIS

    #include <wchar.h>
    
    size_t mbsrtowcs(wchar_t *dest, const char **src,
                      size_t len, mbstate_t *ps);
    
     

    DESCRIPTION

    If dest is not a NULL pointer, the mbsrtowcs() function converts the multibyte string *src to a wide-character string starting at dest. At most len wide characters are written to dest. The shift state *ps is updated. The conversion is effectively performed by repeatedly calling mbrtowc(dest, *src, n, ps) where n is some positive number, as long as this call succeeds, and then incrementing dest by one and *src by the number of bytes consumed. The conversion can stop for three reasons:
    1.
    An invalid multibyte sequence has been encountered. In this case *src is left pointing to the invalid multibyte sequence, (size_t) -1 is returned, and errno is set to EILSEQ.
    2.
    len non-Laq\0aq wide characters have been stored at dest.    #include <this>
    case *src is left pointing to the next multibyte sequence to be converted, and the number of wide characters written to dest is returned.
    3.
    The multibyte string has been completely converted, including the terminating aq\0aq (which has the side effect of bringing back *ps to the initial state). In this case *src is set to NULL, and the number of wide characters written to dest, excluding the terminating Laq\0aq character, is returned.

    If dest is NULL, len is ignored, and the conversion proceeds as above, except that the converted wide characters are not written out to memory, and that no length limit exists.

    In both of the above cases, if ps is a NULL pointer, a static anonymous state only known to the mbsrtowcs() function is used instead.

    The programmer must ensure that there is room for at least len wide characters at dest.  

    RETURN VALUE

    The mbsrtowcs() function returns the number of wide characters that make up the converted part of the wide-character string, not including the terminating null wide character. If an invalid multibyte sequence was encountered, (size_t) -1 is returned, and errno set to EILSEQ.  

    CONFORMING TO

    C99.  

    NOTES

    The behavior of mbsrtowcs() depends on the LC_CTYPE category of the current locale.

    Passing NULL as ps is not multithread safe.  

    SEE ALSO

    iconv(3), mbsnrtowcs(3), mbstowcs(3)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


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