Subversion Repositories openrisc_me

#ifndef CYGONCE_LIBC_STDIO_IO_INL

#define CYGONCE_LIBC_STDIO_IO_INL

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

//

//      io.inl

//

//      Internal C library stdio io interface inlines

//

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

//####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

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// 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

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):     nickg

// Contributors:

// Date:          2000-06-30

// Purpose:

// Description:

// Usage:         #include 

//

//####DESCRIPTIONEND####

//

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

// CONFIGURATION

#include    // Configuration header

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

// INCLUDES

#include 

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

// FileIO versions of IO functions

#ifdef CYGPKG_LIBC_STDIO_FILEIO

inline Cyg_ErrNo cyg_stdio_open( const char *filename,

                                 const Cyg_StdioStream::OpenMode rw,

                                 const cyg_bool binary,

                                 const cyg_bool append,

                                 cyg_stdio_handle_t *dev)

{

    mode_t mode = 0;

    int fd;

    switch( rw )

    {

    case Cyg_StdioStream::CYG_STREAM_WRITE:

        mode = O_WRONLY|O_CREAT|O_TRUNC;

        break;

    case Cyg_StdioStream::CYG_STREAM_READ:

        mode = O_RDONLY;

        break;

    case Cyg_StdioStream::CYG_STREAM_READWRITE:

        mode = O_RDWR;

        break;

    }

    if( append )

    {

        mode |= O_APPEND;

        mode &= ~O_TRUNC;

    }

    fd = open( filename, mode );

    if( fd < 0 )

        return errno;

    *dev = fd;

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_close( cyg_stdio_handle_t dev )

{

    if( close( dev ) != ENOERR )

        return errno;

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_read( cyg_stdio_handle_t dev,

                                 void *buffer, cyg_uint32 *len )

{

    if( dev != CYG_STDIO_HANDLE_NULL )

    {

        ssize_t done = read( dev, buffer, *len );

        if( done < 0 )

        {

            *len = 0;

            return errno;

        }

        *len = done;

    }

    // If the device is NULL, just return EOF indication

    else *len = 0;

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_write( cyg_stdio_handle_t dev,

                                 const void *buffer, cyg_uint32 *len )

{

    if( dev != CYG_STDIO_HANDLE_NULL )

    {

        ssize_t done = write( dev, buffer, *len );

        if( done < 0 )

        {

            *len = 0;

            return errno;

        }

        *len = done;

    }

    // if the device is NULL, just absorb all writes.

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_lseek( cyg_stdio_handle_t dev,

                                  off_t *pos, int whence )

{

    off_t newpos = lseek( dev, *pos, whence );

    if( newpos < 0 )

        return errno;

    *pos = newpos;

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_flush( cyg_stdio_handle_t dev )

{

    int err = fsync( dev );

    if( err < 0 )

        return errno;

    return ENOERR;

}

inline cyg_bool cyg_stdio_interactive( cyg_stdio_handle_t dev )

{

    struct stat buf;

    int err;

    err = fstat( dev, &buf );

    // If we get an error, assume interactive.

    if( err < 0 )

        return true;

    if( S_ISCHR(buf.st_mode) )

        return true;

    return false;

}

#endif // CYGPKG_LIBC_STDIO_FILEIO

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

// Direct IO versions of IO functions

#ifndef CYGPKG_LIBC_STDIO_FILEIO

inline Cyg_ErrNo cyg_stdio_open( const char *filename,

                                 const Cyg_StdioStream::OpenMode rw,

                                 const cyg_bool binary,

                                 const cyg_bool append,

                                 cyg_stdio_handle_t *dev)

{

    return cyg_io_lookup( filename, dev );

}

inline Cyg_ErrNo cyg_stdio_close( cyg_stdio_handle_t dev )

{

    // Devices do not get closed

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_read( cyg_stdio_handle_t dev,

                                 void *buffer, cyg_uint32 *len )

{

    return cyg_io_read( dev, buffer, len );

}

inline Cyg_ErrNo cyg_stdio_write( cyg_stdio_handle_t dev,

                                 const void *buffer, cyg_uint32 *len )

{

    return cyg_io_write( dev, buffer, len );

}

inline cyg_uint32 cyg_stdio_lseek( cyg_stdio_handle_t dev,

                                  cyg_uint32 *pos, int whence )

{

    // No seeking in raw devices, just return fake success

    return ENOERR;

}

inline Cyg_ErrNo cyg_stdio_flush( cyg_stdio_handle_t dev )

{

    return cyg_io_get_config(dev,

                             CYG_IO_GET_CONFIG_SERIAL_OUTPUT_DRAIN,

                             NULL, NULL);

}

inline cyg_bool cyg_stdio_interactive( cyg_stdio_handle_t dev )

{

    return true;

}

#endif // !CYGPKG_LIBC_STDIO_FILEIO

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

#endif // CYGONCE_LIBC_STDIO_IO_INL multiple inclusion protection

// EOF io.inl