force to new usefull_macros lib

Daemons/weatherdaemon_newmeteo.deprecated/term.c

@@ -0,0 +1,156 @@
+/*
+ * This file is part of the weatherdaemon project.
+ * Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>  // isspace
+#include <stdio.h>
+#include <string.h>
+#include <strings.h> // strncasecmp
+#include <time.h>    // time(NULL)
+#include <limits.h>  // INT_MAX, INT_MIN
+#include <pthread.h>
+
+#include "cmdlnopts.h"
+#include "term.h"
+
+#define BUFLEN (4096)
+
+static TTY_descr *ttydescr = NULL;
+extern glob_pars *GP;
+
+static char buf[BUFLEN];
+static const char *emultemplate = "0R0,S=1.9,D=217.2,P=787.7,T=10.8,H=69.0,R=31.0,Ri=0.0,Rs=Y";
+
+/**
+ * read strings from terminal (ending with '\n') with timeout
+ * @return NULL if nothing was read or pointer to static buffer
+ */
+static char *read_string(){
+    //static int done = 0;
+    if(GP->emul){
+        strncpy(buf, emultemplate, BUFLEN);
+        return buf;
+    }
+    if(!ttydescr) ERRX("Serial device not initialized");
+    size_t r = 0, l;
+    int LL = BUFLEN - 1;
+    char *ptr = buf;
+    double d0 = dtime();
+    do{
+        if((l = read_tty(ttydescr))){
+            strncpy(ptr, ttydescr->buf, LL);
+            r += l; LL -= l; ptr += l;
+            //DBG("l=%zd, r=%zd, LL=%d", l, r, LL);
+            d0 = dtime();
+            if(r > 2 && ptr[-1] == '\n') break;
+        }
+    }while(dtime() - d0 < WAIT_TMOUT && LL);
+    if(r){
+        //buf[r] = 0;
+        //DBG("buf: %s", buf);
+        return buf;
+    }
+    return NULL;
+}
+
+/**
+ * Try to connect to `device` at baudrate speed
+ * @return 1 if OK
+ */
+int try_connect(char *device, int baudrate){
+    if(!device) return 0;
+    fflush(stdout);
+    ttydescr = new_tty(device, baudrate, 1024);
+    if(ttydescr) ttydescr = tty_open(ttydescr, 1); // exclusive open
+    if(!ttydescr) return 0;
+    while(read_tty(ttydescr)); // clear rbuf
+    LOGMSG("Connected to %s", device);
+    return 1;
+}
+
+// stop polling thread and close tty
+void stop_tty(){
+    if(ttydescr)  close_tty(&ttydescr);
+}
+
+static weather_t lastweather;
+typedef struct{
+    const char *parname;
+    int parlen;
+    double *weatherpar;
+} wpair_t;
+
+static const wpair_t wpairs[] = {
+    {"S=", 2, &lastweather.windspeed},
+    {"D=", 2, &lastweather.winddir},
+    {"P=", 2, &lastweather.pressure},
+    {"T=", 2, &lastweather.temperature},
+    {"H=", 2, &lastweather.humidity},
+    {"R=", 2, &lastweather.rainfall},
+    {NULL, 0, NULL}
+};
+
+static int parseans(char *str, weather_t *w){
+    if(strncmp(str, "0R0,", 4)){
+        WARNX("Wrong answer");
+        LOGWARN("poll_device() get wrong answer: %s", str);
+        return FALSE;
+    }
+    str += 3;
+    do{
+        ++str;
+        //DBG("start=%s", str);
+        const wpair_t *el = wpairs;
+        while(el->parname){
+            if(strncmp(str, el->parname, el->parlen) == 0){ // found next parameter
+                str += el->parlen;
+                char *endptr;
+                *el->weatherpar = strtod(str, &endptr);
+                DBG("found par: %s, val=%g", el->parname, *el->weatherpar);
+                if(endptr == str){
+                    DBG("Wrong double value");
+                    *el->weatherpar = 0.;
+                    //return FALSE;
+                }
+                break;
+            }
+            ++el;
+        }
+        str = strchr(str, ',');
+        //DBG("next=%s", str);
+    }while(str && *str);
+    lastweather.tmeasure = dtime();
+    if(w) memcpy(w, &lastweather, sizeof(weather_t));
+    return TRUE;
+}
+
+// get weather measurements; return FALSE if something failed
+int getlastweather(weather_t *w){
+    if(!GP->emul){
+        if(write_tty(ttydescr->comfd, "!0R0\r\n", 6))
+            return FALSE;
+    }
+    double t0 = dtime();
+    while(dtime() - t0 < T_POLLING_TMOUT){
+        char *r = NULL;
+        if((r = read_string())){ // parse new data
+            //DBG("got %s", r);
+            if(parseans(r, w)) return TRUE;
+        }
+    }
+    return FALSE;
+}