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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 Free Software Foundation, 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jlarmour
// Contributors:
// Date: 2000-04-19
// Purpose:
// Description:
// Usage: Do not include this file directly, instead
// #include <cyg/libc/stdio/streambuf.hxx>
//
//####DESCRIPTIONEND####
//
//===========================================================================
// CONFIGURATION
#include <pkgconf/libc_stdio.h> // Configuration header
// Include buffered I/O?
#if defined(CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO)
// INCLUDES
#include <cyg/infra/cyg_type.h> // Common project-wide type definitions
#include <cyg/infra/cyg_ass.h> // Assertion support
#include <errno.h> // Cyg_ErrNo
#include <stdio.h> // fpos_t and iobuf defines
#include <stdlib.h> // free()
#include <cyg/libc/stdio/streambuf.hxx> // header for this file, just in case
#include <limits.h> // 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
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