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

    NAME

    ungetwc - push back a wide character onto a FILE stream
     
    

    SYNOPSIS

    #include <wchar.h>
    
    wint_t ungetwc(wint_t wc, FILE *stream);
    
     

    DESCRIPTION

    The ungetwc() function is the wide-character equivalent of the ungetc(3) function. It pushes back a wide character onto stream and returns it.

    If wc is WEOF, it returns WEOF. If wc is an invalid wide character, it sets errno to EILSEQ and returns WEOF.

    If wc is a valid wide character, it is pushed back onto the stream and thus becomes available for future wide-character read operations. The file-position indicator is decremented by one or more. The end-of-file indicator is cleared. The backing storage of the file is not affected.

    Note: wc need not be the last wide-character read from the stream; it can be any other valid wide character.

    If the implementation supports multiple push-back operations in a row, the pushed-back wide characters will be read in reverse order; however, only one level of push-back is guaranteed.  

    RETURN VALUE

    The ungetwc() function returns wc when successful, or WEOF upon failure.  

    CONFORMING TO

    C99.  

    NOTES

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

    SEE ALSO

    fgetwc(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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