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