- Added support for command line option parsing

- Creates a vector with filenames to be opened; not actually useful now,
it's already in place when it'll be needed.


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@191 3ecf2c5c-341e-0410-92b4-d18e462d057c

po/POTFILES.in

@@ -1,6 +1,5 @@
 # List of source files which contain translatable strings.
 
-# src/pippo.cc
+src/parseopts.cc
-# src/pluto.cc
 # ...
 

src/Makefile.am

@@ -48,9 +48,13 @@ sgpemv2_LDADD = $(PYTHON_LDFLAGS) \
 sgpemv2_LDFLAGS = $(PYTHON_EXTRA_LDFLAGS)
 
 # Please keep this in sorted order:
-sgpemv2_SOURCES = main.cc
+sgpemv2_SOURCES = \
+	main.cc \
+	parseopts.cc
 
-noinst_HEADERS = # main.hh ...
+noinst_HEADERS = \
+	main.hh \
+	parseopts.hh
 
 # loadable python modules
 mod_PYTHON = # policy.py

src/main.cc

@@ -21,31 +21,47 @@
 #include "config.h"
 #include "gettext.h"
 
+#include "parseopts.hh"
+
+#include <algorithm>
+#include <functional>
 #include <iostream>
+#include <iterator>
+#include <string>
+#include <vector>
 
-// Static functions declarations:
-static void print_license();
 
-int main(int argc, char* argv[]) {
+// Functor to be used by for_each()
+struct create_fnames_vect : public std::unary_function<const char*, void> 
+{
+  typedef std::vector<std::string>& vect_type;
+public:
+  create_fnames_vect(vect_type v) : _v(v) {}
+  void operator()(const char* str) {_v.push_back(str);}
+private:
+  vect_type _v;
+};
+
+
+int 
+main(int argc, char* argv[]) 
+{
+  using namespace std;
+
   // Set up gettext support
   setlocale(LC_ALL, "");
   bindtextdomain(PACKAGE, LOCALEDIR);
   textdomain(PACKAGE);
 
-  // Print out license informations
+  // Parses options and prepares vector with 
-  print_license();
+  // filenames of documents to be opened
+  vector<string> filenames;
+  {
+    int a_count  = argc;
+    char** a_ptr = argv;
+    parse_options(a_count, a_ptr);
+    for_each(a_ptr, a_ptr+a_count, create_fnames_vect(filenames));
+  }
 
   return 0;
 }
-
-void print_license() {
-  // Do _NOT_ translate this text.
-  std::cerr <<
-    "SGPEMv2, Copyright (C) 2005, 2006  University of Padova,\n"
-    "                  dept. of Pure and Applied Mathematics.\n"
-    "SGPEMv2 comes with ABSOLUTELY NO WARRANTY. This is free \n"
-    "software, and you are welcome to redistribute it under  \n"
-    "the terms of the GNU General Public License; for details\n"
-    "see file COPYING contained in the source package.       \n" 
-    	<< std::endl;
-}

src/parseopts.cc

@@ -0,0 +1,117 @@
+// src/parseopts.cc - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "config.h"
+#include "gettext.h"
+
+#include "main.hh"
+#include "parseopts.hh"
+
+#ifdef _GNU_SOURCE
+#include <getopt.h>
+#endif
+
+#include <cstdio>
+#include <cstdlib>
+#include <unistd.h>
+#include <iostream>
+
+// Static declarations:
+static void display_help();
+
+void
+parse_options(int& argc, char**& argv) 
+{
+  print_license();
+  
+  static const char* short_options = "nh";
+
+  #ifdef _GNU_SOURCE
+  // Initialize the array for GNU long options
+  static struct option long_options[] = 
+    {
+      {"no-gui", no_argument, NULL, 'n' },
+      {"help",   no_argument, NULL, 'h' },
+    };
+  int option_index = 0;
+  #endif
+
+  int opt;
+  do 
+    {
+      #ifdef _GNU_SOURCE
+      opt = getopt_long(argc, argv, short_options,
+			long_options, &option_index);
+      #else 
+      opt = getopt(argc, argv, short_options);
+      #endif
+      
+      switch(opt) 
+	{
+	case -1:
+	  // We have finished normally
+	  break;
+	case 'n' :
+	  // We don't return to main, instead we 
+	  // initialize the command line version
+	  // of sgpemv2 (?)
+	  
+	  // FIXME : to be written!
+	  break;
+	case 'h' :
+	default :
+	  display_help();
+	}
+    } while( opt != -1 );
+  
+  argc -= optind;
+  argv += optind;
+}
+
+
+void
+display_help() {
+  printf( _("SGPEMv2 is an educational software acting as a process scheduling simulator\n"
+            "\n\nUsage : stradivari [options]" // filenames"
+            "\n\nOptions:\n"
+            "\t-h, --help              this help you're reading\n"
+            "\t-n, --no-gui            starts the program in command line mode\n"
+	    //            "\nFilenames:\n"
+	    //            "\t                        a list of any valid SGPEMv2 XML file\n"
+	    //	          "\t                        to be opened, space-separated.\n"
+            "\nLong options are available only on GNU systems.\n\n" ) );
+  exit(0);
+}
+
+
+void 
+print_license() 
+{
+  // Do _NOT_ translate this text.
+  std::cerr <<
+    "SGPEMv2, Copyright (C) 2005, 2006  University of Padova,\n"
+    "                  dept. of Pure and Applied Mathematics.\n"
+    "SGPEMv2 comes with ABSOLUTELY NO WARRANTY. This is free \n"
+    "software, and you are welcome to redistribute it under  \n"
+    "the terms of the GNU General Public License; for details\n"
+    "see file COPYING contained in the source package.       \n" 
+    	<< std::endl;
+}
+

src/parseopts.hh

@@ -0,0 +1,40 @@
+// src/parseopts.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef PARSEOPTS_HH
+#define PARSEOPTS_HH 1
+
+//! Parses command line options 
+/** Parses command line options and sets argv to the first filename 
+ *  given to the cmdline. 
+ *  If no filename is given, in the end argc will be 0
+ *  Else argc will contain the length of the remaining argv[].
+ *  If you still need the initial values of the global argc and argv
+ *  passed to the main routine, remember to store them somewhere before
+ *  calling this function.
+ *  \param argc The number of elements of the argv array
+ *  \param argv The array of command line parameter strings
+ */
+void parse_options(int& argc, char**& argv);
+
+//! Prints license notice text to stderr
+void print_license();
+
+#endif