[process] Include process name in debug messages
[ipxe.git] / src / core / lineconsole.c
1 /*
2 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * Line-based console
29 *
30 */
31
32 #include <stdint.h>
33 #include <stddef.h>
34 #include <ipxe/ansiesc.h>
35 #include <ipxe/lineconsole.h>
36
37 /**
38 * Print a character to a line-based console
39 *
40 * @v character Character to be printed
41 * @ret print Print line
42 */
43 size_t line_putchar ( struct line_console *line, int character ) {
44
45 /* Strip ANSI escape sequences */
46 character = ansiesc_process ( &line->ctx, character );
47 if ( character < 0 )
48 return 0;
49
50 /* Handle backspace characters */
51 if ( character == '\b' ) {
52 if ( line->index )
53 line->index--;
54 return 0;
55 }
56
57 /* Ignore carriage return */
58 if ( character == '\r' )
59 return 0;
60
61 /* Treat newline as a terminator */
62 if ( character == '\n' )
63 character = 0;
64
65 /* Add character to buffer */
66 line->buffer[line->index++] = character;
67
68 /* Do nothing more unless we reach end-of-line (or end-of-buffer) */
69 if ( ( character != 0 ) &&
70 ( line->index < ( line->len - 1 /* NUL */ ) ) ) {
71 return 0;
72 }
73
74 /* Reset to start of buffer */
75 line->index = 0;
76
77 return 1;
78 }