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

    NAME

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

    SYNOPSIS

    #include <stdlib.h>
    
    size_t mbstowcs(wchar_t *dest, const char *src, size_t n);
    
     

    DESCRIPTION

    If dest is not a NULL pointer, the mbstowcs() function converts the multibyte string src to a wide-character string starting at dest. At most n wide characters are written to dest. The conversion starts in the initial state. The conversion can stop for three reasons:
    1.
    An invalid multibyte sequence has been encountered. In this case (size_t) -1 is returned.
    2.
    n non-Laq\0aq wide characters have been stored at dest.    #include <this>
    case the number of wide characters written to dest is returned, but the shift state at this point is lost.
    3.
    The multibyte string has been completely converted, including the terminating aq\0aq. In this case the number of wide characters written to dest, excluding the terminating Laq\0aq character, is returned.

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

    If dest is NULL, n 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 order to avoid the case 2 above, the programmer should make sure n is greater or equal to mbstowcs(NULL,src,0)+1.  

    RETURN VALUE

    The mbstowcs() 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.  

    CONFORMING TO

    C99.  

    NOTES

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

    The function mbsrtowcs(3) provides a better interface to the same functionality.  

    SEE ALSO

    mbsrtowcs(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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