81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
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* readkey.c - read keystrokes and decode standard escape sequences
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*
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* Partly based on busybox vi
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <linux/ctype.h>
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#include <readkey.h>
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struct esc_cmds {
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const char *seq;
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char val;
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};
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static const struct esc_cmds esccmds[] = {
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{"OA", BB_KEY_UP}, // cursor key Up
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{"OB", BB_KEY_DOWN}, // cursor key Down
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{"OC", BB_KEY_RIGHT}, // Cursor Key Right
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{"OD", BB_KEY_LEFT}, // cursor key Left
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{"OH", BB_KEY_HOME}, // Cursor Key Home
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{"OF", BB_KEY_END}, // Cursor Key End
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{"[A", BB_KEY_UP}, // cursor key Up
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{"[B", BB_KEY_DOWN}, // cursor key Down
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{"[C", BB_KEY_RIGHT}, // Cursor Key Right
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{"[D", BB_KEY_LEFT}, // cursor key Left
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{"[H", BB_KEY_HOME}, // Cursor Key Home
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{"[F", BB_KEY_END}, // Cursor Key End
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{"[1~", BB_KEY_HOME}, // Cursor Key Home
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{"[2~", BB_KEY_INSERT}, // Cursor Key Insert
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{"[3~", BB_KEY_DEL}, // Cursor Key Delete
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{"[4~", BB_KEY_END}, // Cursor Key End
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{"[5~", BB_KEY_PAGEUP}, // Cursor Key Page Up
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{"[6~", BB_KEY_PAGEDOWN},// Cursor Key Page Down
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};
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int read_key(void)
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{
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char c;
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char esc[5];
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c = getc();
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if (c == 27) {
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int i = 0;
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esc[i++] = getc();
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esc[i++] = getc();
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if (isdigit(esc[1])) {
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while(1) {
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esc[i] = getc();
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if (esc[i++] == '~')
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break;
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if (i == ARRAY_SIZE(esc))
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return -1;
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}
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}
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esc[i] = 0;
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for (i = 0; i < ARRAY_SIZE(esccmds); i++){
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if (!strcmp(esc, esccmds[i].seq))
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return esccmds[i].val;
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}
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return -1;
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}
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return c;
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}
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EXPORT_SYMBOL(read_key);
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