084a102af3
We have keys with values > 127, so it must be an unsigned char. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
|
|
* readkey.c - read keystrokes and decode standard escape sequences
|
|
*
|
|
* Partly based on busybox vi
|
|
*
|
|
* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/ctype.h>
|
|
#include <readkey.h>
|
|
|
|
struct esc_cmds {
|
|
const char *seq;
|
|
unsigned char val;
|
|
};
|
|
|
|
static const struct esc_cmds esccmds[] = {
|
|
{"OA", BB_KEY_UP}, // cursor key Up
|
|
{"OB", BB_KEY_DOWN}, // cursor key Down
|
|
{"OC", BB_KEY_RIGHT}, // Cursor Key Right
|
|
{"OD", BB_KEY_LEFT}, // cursor key Left
|
|
{"OH", BB_KEY_HOME}, // Cursor Key Home
|
|
{"OF", BB_KEY_END}, // Cursor Key End
|
|
{"[A", BB_KEY_UP}, // cursor key Up
|
|
{"[B", BB_KEY_DOWN}, // cursor key Down
|
|
{"[C", BB_KEY_RIGHT}, // Cursor Key Right
|
|
{"[D", BB_KEY_LEFT}, // cursor key Left
|
|
{"[H", BB_KEY_HOME}, // Cursor Key Home
|
|
{"[F", BB_KEY_END}, // Cursor Key End
|
|
{"[1~", BB_KEY_HOME}, // Cursor Key Home
|
|
{"[2~", BB_KEY_INSERT}, // Cursor Key Insert
|
|
{"[3~", BB_KEY_DEL}, // Cursor Key Delete
|
|
{"[4~", BB_KEY_END}, // Cursor Key End
|
|
{"[5~", BB_KEY_PAGEUP}, // Cursor Key Page Up
|
|
{"[6~", BB_KEY_PAGEDOWN},// Cursor Key Page Down
|
|
};
|
|
|
|
int read_key(void)
|
|
{
|
|
char c;
|
|
char esc[5];
|
|
c = getc();
|
|
|
|
if (c == 27) {
|
|
int i = 0;
|
|
esc[i++] = getc();
|
|
esc[i++] = getc();
|
|
if (isdigit(esc[1])) {
|
|
while(1) {
|
|
esc[i] = getc();
|
|
if (esc[i++] == '~')
|
|
break;
|
|
if (i == ARRAY_SIZE(esc))
|
|
return -1;
|
|
}
|
|
}
|
|
esc[i] = 0;
|
|
for (i = 0; i < ARRAY_SIZE(esccmds); i++){
|
|
if (!strcmp(esc, esccmds[i].seq))
|
|
return esccmds[i].val;
|
|
}
|
|
return -1;
|
|
}
|
|
return c;
|
|
}
|
|
EXPORT_SYMBOL(read_key);
|