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/*
* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program 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 of the
* License, or any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* Line-based console
*
*/
#include <stdint.h>
#include <stddef.h>
#include <ipxe/ansiesc.h>
#include <ipxe/lineconsole.h>
/**
* Print a character to a line-based console
*
* @v character Character to be printed
* @ret print Print line
*/
size_t line_putchar ( struct line_console *line, int character ) {
/* Strip ANSI escape sequences */
character = ansiesc_process ( &line->ctx, character );
if ( character < 0 )
return 0;
/* Handle backspace characters */
if ( character == '\b' ) {
if ( line->index )
line->index--;
return 0;
}
/* Ignore carriage return */
if ( character == '\r' )
return 0;
/* Treat newline as a terminator */
if ( character == '\n' )
character = 0;
/* Add character to buffer */
line->buffer[line->index++] = character;
/* Do nothing more unless we reach end-of-line (or end-of-buffer) */
if ( ( character != 0 ) &&
( line->index < ( line->len - 1 /* NUL */ ) ) ) {
return 0;
}
/* Reset to start of buffer */
line->index = 0;
return 1;
}
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