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

  • BSD mandoc
     

    NAME

    
    
    fgetc
    
     
    getc
    
     
    getc_unlocked
    
     
    getchar
    
     
    getchar_unlocked
    
     
    getw
    
     - get next character or word from input stream
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <stdio.h>
    int fgetc (FILE *stream);
    int getc (FILE *stream);
    int getc_unlocked (FILE *stream);
    int getchar (void);
    int getchar_unlocked (void);
    int getw (FILE *stream);
     

    DESCRIPTION

    The fgetc ();
    function obtains the next input character (if present) from the stream pointed at by Fa stream , or the next character pushed back on the stream via ungetc(3).

    The getc ();
    function acts essentially identically to fgetc (,);
    but is a macro that expands in-line.

    The getchar ();
    function is equivalent to getc (stdin .);

    The getw ();
    function obtains the next Vt int (if present) from the stream pointed at by Fa stream .

    The getc_unlocked ();
    and getchar_unlocked ();
    functions are equivalent to getc ();
    and getchar ();
    respectively, except that the caller is responsible for locking the stream with flockfile(3) before calling them. These functions may be used to avoid the overhead of locking the stream for each character, and to avoid input being dispersed among multiple threads reading from the same stream.  

    RETURN VALUES

    If successful, these routines return the next requested object from the Fa stream . Character values are returned as an Vt unsigned char converted to an Vt int . If the stream is at end-of-file or a read error occurs, the routines return EOF The routines feof(3) and ferror(3) must be used to distinguish between end-of-file and error. If an error occurs, the global variable errno is set to indicate the error. The end-of-file condition is remembered, even on a terminal, and all subsequent attempts to read will return EOF until the condition is cleared with clearerr(3).  

    SEE ALSO

    ferror(3), flockfile(3), fopen(3), fread(3), getwc(3), putc(3), ungetc(3)  

    STANDARDS

    The fgetc (,);
    getc ();
    and getchar ();
    functions conform to St -isoC . The getc_unlocked ();
    and getchar_unlocked ();
    functions conform to St -p1003.1-2001 .  

    BUGS

    Since EOF is a valid integer value, feof(3) and ferror(3) must be used to check for failure after calling getw (.);
    The size and byte order of an Vt int varies from one machine to another, and getw ();
    is not recommended for portable applications.


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    SEE ALSO
    STANDARDS
    BUGS


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