Method: IO#binmode

Defined in:
io.c

#binmode ⇒ self

Sets the stream’s data mode as binary (see Data Mode).

A stream’s data mode may not be changed from binary to text.

Returns:

  • (self) 


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# File 'io.c', line 6405

static VALUE
rb_io_binmode_m(VALUE io)
{
    VALUE write_io;

    rb_io_ascii8bit_binmode(io);

    write_io = GetWriteIO(io);
    if (write_io != io)
        rb_io_ascii8bit_binmode(write_io);
    return io;
}