77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
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/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* Line-based console
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*
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <ipxe/ansiesc.h>
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#include <ipxe/lineconsole.h>
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/** Line-based console ANSI escape sequence handlers */
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static struct ansiesc_handler line_ansiesc_handlers[] = {
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{ 0, NULL }
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};
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/** Line-based console ANSI escape sequence context */
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static struct ansiesc_context line_ansiesc_ctx = {
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.handlers = line_ansiesc_handlers,
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};
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/**
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* Print a character to a line-based console
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*
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* @v character Character to be printed
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* @ret print Print line
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*/
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size_t line_putchar ( struct line_console *line, int character ) {
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/* Strip ANSI escape sequences */
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character = ansiesc_process ( &line_ansiesc_ctx, character );
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if ( character < 0 )
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return 0;
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/* Ignore carriage return */
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if ( character == '\r' )
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return 0;
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/* Treat newline as a terminator */
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if ( character == '\n' )
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character = 0;
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/* Add character to buffer */
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line->buffer[line->index++] = character;
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/* Do nothing more unless we reach end-of-line (or end-of-buffer) */
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if ( ( character != 0 ) &&
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( line->index < ( line->len - 1 /* NUL */ ) ) ) {
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return 0;
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}
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/* Reset to start of buffer */
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line->index = 0;
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return 1;
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}
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