Add Weather_chk

Auxiliary_utils/Weather_chk/cmdlnopts.c

@@ -0,0 +1,73 @@
+/*
+ * This file is part of the ttyterm project.
+ * Copyright 2020 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 <assert.h> // assert
+#include <stdio.h>  // printf
+#include <string.h> // memcpy
+#include <usefull_macros.h>
+#include "cmdlnopts.h"
+
+/*
+ * here are global parameters initialisation
+ */
+static int help;
+static glob_pars  G;
+
+//            DEFAULTS
+// default global parameters
+glob_pars const Gdefault = {
+    .speed = 9600,
+    .ttyname = "/dev/ttyUSB0",
+};
+
+/*
+ * Define command line options by filling structure:
+ *  name    has_arg flag    val     type        argptr          help
+*/
+static myoption cmdlnopts[] = {
+    // set 1 to param despite of its repeating number:
+    {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&help),        _("show this help")},
+    {"speed",   NEED_ARG,   NULL,   's',    arg_int,    APTR(&G.speed),     _("baudrate (default: 9600)")},
+    {"devname", NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.ttyname),   _("serial device name")},
+    end_option
+};
+
+/**
+ * Parse command line options and return dynamically allocated structure
+ *      to global parameters
+ * @param argc - copy of argc from main
+ * @param argv - copy of argv from main
+ * @return allocated structure with global parameters
+ */
+glob_pars *parse_args(int argc, char **argv){
+    void *ptr = memcpy(&G, &Gdefault, sizeof(G)); assert(ptr);
+    // format of help: "Usage: progname [args]\n"
+    change_helpstring(_("Usage: %s [args]\n\n\tWhere args are:\n"));
+    // parse arguments
+    parseargs(&argc, &argv, cmdlnopts);
+    if(help) showhelp(-1, cmdlnopts);
+    if(argc > 0){
+        WARNX("Wrong arguments:\n");
+        for(int i = 0; i < argc; i++)
+            fprintf(stderr, "\t%s\n", argv[i]);
+        signals(9);
+    }
+    return &G;
+}
+