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contiki/core/ctk/ctk-term-in.c

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/*
* Copyright (c) 2004, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Adam Dunkels <adam@sics.se>
*
* $Id: ctk-term-in.c,v 1.1 2006/06/17 22:41:16 adamdunkels Exp $
*/
#include <string.h>
#include "ctk/ctk.h"
#include "ctk-term.h"
#include "ctk-term-int.h"
#include "ctk-term-ascii.h"
#define PRINTF(x)
/*-----------------------------------------------------------------------------------*/
/*
* #defines and enums
*/
/*-----------------------------------------------------------------------------------*/
/* Size of input key buffer */
#define NUMKEYS 20
/* ANSI character classes */
enum {ACC_C0, ACC_INTERM, ACC_PARAM, ACC_LOWCASE, ACC_UPCASE,ACC_C1, ACC_G1, ACC_DEL, ACC_SPEC };
/*-----------------------------------------------------------------------------------*/
/*
* Structures
*/
/*-----------------------------------------------------------------------------------*/
/* Structure for mapping a character sequence to a key */
struct seqmap
{
const char* seq;
const ctk_arch_key_t key;
};
/*-----------------------------------------------------------------------------------*/
/*
* Local variables
*/
/*-----------------------------------------------------------------------------------*/
static ctk_arch_key_t keys[NUMKEYS];
static int firstkey, lastkey;
/* Sequences starting with ESC [ .... */
const static struct seqmap ctrlmap[] =
{
{"A",CH_CURS_UP},
{"B",CH_CURS_DOWN},
{"C",CH_CURS_RIGHT},
{"D",CH_CURS_LEFT},
{"11~",CH_F1},
{"12~",CH_F2},
{"13~",CH_F3},
{"14~",CH_F4},
// linux console
{"[A",CH_F1},
{"[B",CH_F2},
{"[C",CH_F3},
{"[D",CH_F4},
{0,0}
};
/* Sequences starting with ESC O .... */
const static struct seqmap ss3map[] =
{
{"A",CH_CURS_UP},
{"B",CH_CURS_DOWN},
{"C",CH_CURS_RIGHT},
{"D",CH_CURS_LEFT},
{"P",CH_F1},
{"Q",CH_F2},
{"R",CH_F3},
{"S",CH_F4},
{0,0}
};
/*-----------------------------------------------------------------------------------*/
/*
* Add a key to the input buffer
*/
/*-----------------------------------------------------------------------------------*/
static void
enqueue_key(ctk_arch_key_t k)
{
keys[lastkey] = k;
++lastkey;
if(lastkey >= NUMKEYS) {
lastkey = 0;
}
}
/*-----------------------------------------------------------------------------------*/
/*
* Classify a character
*/
/*-----------------------------------------------------------------------------------*/
static unsigned char
classify(unsigned char c)
{
if (0x00 <= c && c <=0x1f) return ACC_C0;
if (0x20 <= c && c <=0x2f) return ACC_INTERM;
if (0x30 <= c && c <=0x3f) return ACC_PARAM;
if (0x40 <= c && c <=0x5f) return ACC_UPCASE;
if (0x60 <= c && c <=0x7e) return ACC_LOWCASE;
if (c == 0x7f) return ACC_DEL;
if (0x90 <= c && c <=0x9f) return ACC_C1;
if (c == 0xa0) return ACC_SPEC;
if (0xA1 <= c && c <=0xfe) return ACC_G1;
if (0x90 <= c && c <=0x9f) return ACC_C1;
if (c == 0xff) return ACC_SPEC;
return ACC_SPEC;
}
/*-----------------------------------------------------------------------------------*/
/*
* Lookup a key sequence in a sequencemap and queue the key if sequence found
*/
/*-----------------------------------------------------------------------------------*/
static void
lookup_seq(const char* str, const struct seqmap* map)
{
while (map->seq != 0) {
if (strcmp(str,map->seq) == 0) {
enqueue_key(map->key);
return;
}
map++;
}
}
/*-----------------------------------------------------------------------------------*/
/* \internal
* Parse a character stream
* Returns -1 if c is consumed by the state machine 1 else.
*/
/*-----------------------------------------------------------------------------------*/
static int
parse_input(struct ctk_term_state* st, unsigned char c)
{
unsigned char cl = classify(c);
int ret = -1;
switch(st->inputstate) {
case ANS_IDLE:
switch(cl) {
case ACC_C0:
{
switch(c) {
case ASCII_ESC: st->inputstate = ANS_ESCSEQ; break;
case ASCII_BS: enqueue_key(CH_DEL); break;
case ASCII_HT: enqueue_key(CH_TAB); break;
case ASCII_FF: ctk_term_redraw(st); break;
case ASCII_CR: enqueue_key(CH_ENTER); break;
}
}
break;
case ACC_INTERM:
case ACC_PARAM:
case ACC_LOWCASE:
case ACC_UPCASE:
case ACC_G1:
ret = 1;
break;
case ACC_C1:
if (c == ASCII_CSI) {
st->inputstate = ANS_CTRLSEQ;
st->ctrlCnt = 0;
}
else if (c == ASCII_SS3) {
st->inputstate = ANS_SS3;
st->ctrlCnt = 0;
}
break;
case ACC_DEL:
enqueue_key(CH_DEL);
break;
case ACC_SPEC:
break;
}
break;
case ANS_ESCSEQ:
{
switch(cl) {
case ACC_C0:
case ACC_DEL:
break;
case ACC_INTERM:
st->inputstate = ANS_ESCSEQ_1;
break;
case ACC_UPCASE:
/* C1 control character */
if (c == '[') {
st->inputstate = ANS_CTRLSEQ;
st->ctrlCnt = 0;
}
else if (c == 'O') {
st->inputstate = ANS_SS3;
st->ctrlCnt = 0;
}
else {
st->inputstate = ANS_IDLE;
}
break;
case ACC_PARAM:
/* Private 2-character sequence */
case ACC_LOWCASE:
/* Standard 2-character sequence */
default:
st->inputstate = ANS_IDLE;
break;
}
}
break;
case ANS_ESCSEQ_1:
{
switch(cl) {
case ACC_C0:
case ACC_INTERM:
break;
case ACC_PARAM:
/* Private function*/
case ACC_LOWCASE:
case ACC_UPCASE:
/* Standard function */
default:
st->inputstate = ANS_IDLE;
break;
}
}
break;
case ANS_SS3:
{
switch(cl) {
case ACC_PARAM:
if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c;
break;
case ACC_UPCASE:
/* VT100 PF seq */
if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c;
st->inputstate = ANS_IDLE;
st->ctrlbuf[st->ctrlCnt] = 0;
lookup_seq((const char*)(st->ctrlbuf), ss3map);
break;
default:
st->inputstate = ANS_IDLE;
break;
}
}
break;
case ANS_CTRLSEQ:
{
switch(cl) {
case ACC_C0:
break;
case ACC_INTERM:
case ACC_PARAM:
if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c;
break;
case ACC_LOWCASE:
case ACC_UPCASE:
/* Standard control sequence */
if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c;
/* Cygwin console sends ESC [ [ A for function keys */
if (c != '[') {
st->ctrlbuf[st->ctrlCnt] = 0;
lookup_seq((const char*)(st->ctrlbuf), ctrlmap);
st->inputstate = ANS_IDLE;
}
break;
default:
st->inputstate = ANS_IDLE;
break;
}
}
break;
}
return ret;
}
/*-----------------------------------------------------------------------------------*/
/*
* Initialize the input buffer
*/
/*-----------------------------------------------------------------------------------*/
void ctk_term_input_init()
{
firstkey = lastkey = 0;
}
/*-----------------------------------------------------------------------------------*/
/**
* Handles an input character provided by the client
*
* \param ts State information
* \param b Input character
*/
/*-----------------------------------------------------------------------------------*/
void ctk_term_input(struct ctk_term_state* ts, unsigned char b)
{
int ret = parse_input(ts, b);
PRINTF(("terminput: 0x%02x\n", b));
if (ret > 0) {
enqueue_key((ctk_arch_key_t)b);
}
}
/*-----------------------------------------------------------------------------------*/
/**
* Checks the key press input queue to see if there are pending
* keys. Called by the CTK module.
*
* \return Zero if no key presses are in buffer, non-zero if there are
* key presses in input buffer.
*/
/*-----------------------------------------------------------------------------------*/
unsigned char
ctk_arch_keyavail(void)
{
return firstkey != lastkey;
}
/*-----------------------------------------------------------------------------------*/
/**
* Retrieves key presses from the VNC client. Called by the CTK
* module.
*
* \return The next key in the input queue.
*/
/*-----------------------------------------------------------------------------------*/
ctk_arch_key_t
ctk_arch_getkey(void)
{
ctk_arch_key_t key;
key = keys[firstkey];
if(firstkey != lastkey) {
++firstkey;
if(firstkey >= NUMKEYS) {
firstkey = 0;
}
}
return key;
}
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