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#ifndef CYGONCE_LIBC_STDIO_STREAMBUF_INL

#define CYGONCE_LIBC_STDIO_STREAMBUF_INL

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

//

//      streambuf.inl

//

//      Internal C library stdio stream buffer inline functions

//

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

//####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):    jlarmour

// Contributors:

// Date:         2000-04-19

// Purpose:

// Description:

// Usage:       Do not include this file directly, instead

//              #include 

//

//####DESCRIPTIONEND####

//

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

// CONFIGURATION

#include    // Configuration header

// Include buffered I/O?

#if defined(CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO)

// INCLUDES

#include           // Common project-wide type definitions

#include            // Assertion support

#include                        // Cyg_ErrNo

#include                        // fpos_t and iobuf defines

#include                       // free()

#include   // header for this file, just in case

#include                       // INT_MAX

// FUNCTIONS

inline

Cyg_StdioStreamBuffer::Cyg_StdioStreamBuffer( cyg_ucount32 size,

                                              cyg_uint8 *new_buffer ) :

#if defined(CYGSEM_LIBC_STDIO_SETVBUF_MALLOC)

    call_free(false),

    buffer_bottom( NULL ),

    buffer_size(0),

#else

    buffer_bottom( static_buffer ),

    buffer_size(sizeof(static_buffer)),

#endif

    buffer_top(NULL),

    current_buffer_position(NULL)

{

    // NB Many of the above members in the initialisation list may seem

    // unnecessary, but it is to ensure a defined state if e.g. the malloc

    // in set_buffer() should fail

    (void)set_buffer(size, new_buffer);

} // Cyg_StdioStreamBuffer constructor

inline

Cyg_StdioStreamBuffer::~Cyg_StdioStreamBuffer()

{

#ifdef CYGSEM_LIBC_STDIO_SETVBUF_MALLOC

    if ((buffer_bottom != NULL) && call_free)

        free( buffer_bottom );

#endif

} // Cyg_StdioStreamBuffer destructor

inline cyg_ucount32

Cyg_StdioStreamBuffer::get_buffer_space_used( void )

{

    return (buffer_top - current_buffer_position);

} // get_buffer_space_used()

inline cyg_count32

Cyg_StdioStreamBuffer::get_buffer_size( void )

{

#ifdef CYGSEM_LIBC_STDIO_DYNAMIC_SETVBUF

    if (buffer_bottom==NULL)

        return -1;

#endif

    return buffer_size;

} // get_buffer_size()

inline cyg_ucount32

Cyg_StdioStreamBuffer::get_buffer_addr_to_read( cyg_uint8 **buffer )

{

    *buffer = current_buffer_position;

    return (buffer_top - current_buffer_position);

} // get_buffer_addr_to_read()

inline void

Cyg_StdioStreamBuffer::set_bytes_read( cyg_ucount32 bytes )

{

    cyg_uint8 *buffer_max = &buffer_bottom[ get_buffer_size() ];

    current_buffer_position += bytes;

    // INT_MAX is used by some callers to mean infinite.

    CYG_ASSERT( (current_buffer_position <= buffer_top)

                || (get_buffer_size() == INT_MAX),

                "read too many bytes from buffer" );

    if (current_buffer_position == buffer_max)

        current_buffer_position = buffer_top = &buffer_bottom[0];

} // set_bytes_read()

inline cyg_ucount32

Cyg_StdioStreamBuffer::get_buffer_addr_to_write( cyg_uint8 **buffer )

{

    cyg_uint8 *buffer_max = &buffer_bottom[ get_buffer_size() ];

    *buffer = buffer_top;

    return (buffer_max - buffer_top);

} // get_buffer_addr_to_write()

inline void

Cyg_StdioStreamBuffer::set_bytes_written( cyg_ucount32 bytes )

{

    buffer_top += bytes;

    // INT_MAX is used by some callers to mean infinite.

    CYG_ASSERT( (buffer_top <= &buffer_bottom[ get_buffer_size() ])

                || (get_buffer_size() == INT_MAX),

                "wrote too many bytes into buffer" );

} // set_bytes_written()

inline void

Cyg_StdioStreamBuffer::drain_buffer( void )

{

    buffer_top = current_buffer_position = &buffer_bottom[0];

} // drain_buffer()

#endif // if defined(CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO)

#endif // CYGONCE_LIBC_STDIO_STREAMBUF_INL multiple inclusion protection

// EOF streambuf.inl