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

    NAME

    wcwidth - number of column positions of a wide-character code
     
    

    SYNOPSIS

    #include <wchar.h>

    int wcwidth(wchar_t wc);
     

    DESCRIPTION

    The wcwidth() function shall determine the number of column positions required for the wide character wc. The application shall ensure that the value of wc is a character representable as a wchar_t, and is a wide-character code corresponding to a valid character in the current locale.  

    RETURN VALUE

    The wcwidth() function shall either return 0 (if wc is a null wide-character code), or return the number of column positions to be occupied by the wide-character code wc, or return -1 (if wc does not correspond to a printable wide-character code).  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

    This function was removed from the final ISO/IEC 9899:1990/Amendment 1:1995 (E), and the return value for a non-printable wide character is not specified.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    wcswidth() , the Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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