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125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/* geany_encoding=koi8-r
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* client.c - terminal parser
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*
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* Copyright 2018 Edward V. Emelianoff <eddy@sao.ru>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <strings.h> // strncasecmp
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#include <time.h> // time(NULL)
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#include <limits.h> // INT_MAX, INT_MIN
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#include "term.h"
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#define BUFLEN 1024
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TTY_descr *ttydescr = NULL;
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static char buf[BUFLEN];
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/**
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* read strings from terminal (ending with '\n') with timeout
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* @return NULL if nothing was read or pointer to static buffer
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*/
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static char *read_string(){
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if(!ttydescr) ERRX("Serial device not initialized");
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size_t r = 0, l;
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int LL = BUFLEN - 1;
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char *ptr = NULL;
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static char *optr = NULL;
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if(optr && *optr){
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ptr = optr;
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optr = strchr(optr, '\n');
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if(optr) ++optr;
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//DBG("got data, roll to next; ptr=%s\noptr=%s",ptr,optr);
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return ptr;
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}
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ptr = buf;
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double d0 = dtime();
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do{
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if((l = read_tty(ttydescr))){
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r += l; LL -= l; ptr += l;
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if(ptr[-1] == '\n') break;
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d0 = dtime();
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}
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}while(dtime() - d0 < WAIT_TMOUT && LL);
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if(r){
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buf[r] = 0;
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//DBG("r=%zd, got string: %s", r, buf);
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optr = strchr(buf, '\n');
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if(optr) ++optr;
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return buf;
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}
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return NULL;
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}
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/**
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* Try to connect to `device` at baudrate speed
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* @return 1 if OK
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*/
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int try_connect(char *device, int baudrate){
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if(!device) return 0;
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fflush(stdout);
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ttydescr = new_tty(device, baudrate, 1024);
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if(ttydescr) ttydescr = tty_open(ttydescr, 1); // exclusive open
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if(!ttydescr) return 0;
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while(read_tty(ttydescr)); // clear rbuf
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LOGMSG("Connected to %s", device);
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return 1;
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}
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/**
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* run terminal emulation: send user's commands and show answers
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*/
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void run_terminal(){
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if(!ttydescr) ERRX("Terminal not connected");
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green(_("Work in terminal mode without echo\n"));
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int rb;
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size_t l;
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setup_con();
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while(1){
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if((l = read_tty(ttydescr))){
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printf("%s", ttydescr->buf);
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}
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if((rb = read_console())){
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char c = (char) rb;
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write_tty(ttydescr->comfd, &c, 1);
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}
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}
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}
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/**
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* Poll serial port for new dataportion
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* @return: NULL if no data received, pointer to string if valid data received
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*/
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char *poll_device(){
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char *ans;
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double t0 = dtime();
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while(dtime() - t0 < T_POLLING_TMOUT){
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if((ans = read_string())){ // parse new data
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DBG("got %s", ans);
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/*
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* INSERT CODE HERE
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* (data validation)
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*/
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return ans;
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}
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}
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return NULL;
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}
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