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//===========================================================================

//

//      setvbuf.cxx

//

//      Implementation of C library buffering setup as per ANSI 7.9.5.6

//

//===========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

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//

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// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

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// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//===========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    jlarmour

// Contributors: 

// Date:         2000-04-20

// Purpose:     

// Description: 

// Usage:       

//

//####DESCRIPTIONEND####

//

//===========================================================================

// CONFIGURATION

#include <pkgconf/libc_stdio.h>   // Configuration header

// INCLUDES

#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions

#include <stddef.h>                 // NULL and size_t from compiler

#include <errno.h>                  // Error codes

#include <stdio.h>                  // header for setvbuf()

#include <cyg/libc/stdio/stream.hxx>// C libray streams

// FUNCTIONS

externC int

setvbuf( FILE *stream, char *buf, int mode, size_t size )

{

#ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO

    Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;

    Cyg_ErrNo err;

#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS

    if ( !real_stream->lock_me() ) {

        errno = EBADF;

        return EBADF;

    } // if

#endif

    err = real_stream->io_buf.set_buffer( (cyg_ucount32) size,

                                          (cyg_uint8 *) buf );

    if (!err) {

        switch (mode) {

        case _IONBF:

            CYG_ASSERT( (size == 0) && (buf == NULL),

                        "No buffering wanted but size/address specified!" );

            real_stream->flags.buffering = false;

            real_stream->flags.line_buffering = false;

            break;

        case _IOLBF:

            real_stream->flags.buffering = true;

            real_stream->flags.line_buffering = true;

            break;

        case _IOFBF:

            real_stream->flags.buffering = true;

            real_stream->flags.line_buffering = false;

            break;

        default:

            err = EINVAL;

            break;

        } // switch

    } // if

#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS

    real_stream->unlock_me();

#endif

    if (err) {

        errno = err;

        return err;

    } // if

    return 0;

#else // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO

    errno = ENOSUPP;

    return ENOSUPP;

#endif // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO

} // setvbuf()

// EOF setvbuf.cxx