add code for raspberry-pi based p1 derotator

p1rotator/cmdlnopts.c

@@ -0,0 +1,76 @@
+/*
+ * cmdlnopts.c - the only function that parse cmdln args and returns glob parameters
+ *
+ * Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#include <assert.h>
+#include "cmdlnopts.h"
+#include "usefull_macros.h"
+
+#define RAD 57.2957795130823
+#define D2R(x) ((x) / RAD)
+#define R2D(x) ((x) * RAD)
+
+/*
+ * here are global parameters initialisation
+ */
+int help;
+glob_pars  G;
+
+int verbose = 0; // each -v increments this value, e.g. -vvv sets it to 3
+//            DEFAULTS
+// default global parameters
+glob_pars const Gdefault = {
+    .gotoangle = 400.,
+};
+
+/*
+ * Define command line options by filling structure:
+ *  name    has_arg flag    val     type        argptr          help
+*/
+myoption cmdlnopts[] = {
+    // set 1 to param despite of its repeating number:
+    {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&help),        _("show this help")},
+    // change p3 position, don't run guiding
+    {"goto",    NEED_ARG,   NULL,   'g',    arg_double, APTR(&G.gotoangle), _("rotate for given angle")},
+    // goto 0, don't run guiding
+    {"absmove", NO_ARGS,    NULL,   'a',    arg_none,   APTR(&G.absmove),   _("rotate to given absolute angle (or zero without -g)")},
+    // incremented parameter without args (any -v will increment value of "verbose")
+    {"verbose", NO_ARGS,    NULL,   'v',    arg_none,   APTR(&verbose),     _("verbose level (each -v increase it)")},
+    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;
+    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 || argc > 0) showhelp(-1, cmdlnopts);
+    return &G;
+}
+