From f419bacb4b11f42f87e6e9bc9e8a4719499559f2 Mon Sep 17 00:00:00 2001
From: Francois Fleuret <francois@fleuret.org>
Date: Sun, 23 Dec 2012 14:10:46 +0100
Subject: [PATCH] Now parses options from the command line.

To get the same behavior as before, please use:

  ./mtp --verbose --trajectory-file result.trj --graph-file graph.dot < tracker.dat

instead of simply

 ./mtp tracker.dat
---
 README.txt |   2 +-
 mtp.cc     | 125 ++++++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 97 insertions(+), 30 deletions(-)

diff --git a/README.txt b/README.txt
index afe5cb2..894f59d 100644
--- a/README.txt
+++ b/README.txt
@@ -30,7 +30,7 @@ tracker.dat, and print the optimal detected trajectories.
 
 If you now execute
 
-  ./mtp tracker.dat
+  ./mtp --verbose --trajectory-file result.trj --graph-file graph.dot < tracker.dat
 
 It will load the file tracker.dat saved by the previous command, run
 the detection, save the detected trajectories in result.trj, and the
diff --git a/mtp.cc b/mtp.cc
index 61dcc21..957e56f 100644
--- a/mtp.cc
+++ b/mtp.cc
@@ -25,64 +25,131 @@
 #include <iostream>
 #include <fstream>
 #include <sys/time.h>
+#include <getopt.h>
+#include <string.h>
 
 using namespace std;
 
 #include "mtp_tracker.h"
 
+#define FILENAME_SIZE 1024
+
+char trajectory_filename[FILENAME_SIZE];
+char graph_filename[FILENAME_SIZE];
+int verbose;
+
+void usage(ostream *os) {
+  (*os) << "mtp [-h|--help] [-v|--verbose] [-t|--trajectory-filename <trajectory filename>] [-g|--graph-filename <graph filename>] [<tracking parameter file>]" << endl;
+}
+
 scalar_t diff_in_second(struct timeval *start, struct timeval *end) {
   return
     scalar_t(end->tv_sec - start->tv_sec) +
     scalar_t(end->tv_usec - start->tv_usec)/1000000;
 }
 
-int main(int argc, char **argv) {
+void do_tracking(istream *in_tracker) {
   timeval start_time, end_time;
+  MTPTracker *tracker = new MTPTracker();
 
-  if(argc < 2) {
-    cerr << argv[0] << " <tracker file>" << endl;
-    exit(EXIT_FAILURE);
+  if(verbose) { cout << "Reading the tracking parameters." << endl; }
+  tracker->read(in_tracker);
+
+  if(verbose) { cout << "Building the graph ... "; cout.flush(); }
+  gettimeofday(&start_time, 0);
+  tracker->build_graph();
+  gettimeofday(&end_time, 0);
+  if(verbose) { cout << "done (" << diff_in_second(&start_time, &end_time) << "s)." << endl; }
+
+  if(verbose) { cout << "Tracking ... "; cout.flush(); }
+  gettimeofday(&start_time, 0);
+  tracker->track();
+  gettimeofday(&end_time, 0);
+  if(verbose) { cout << "done (" << diff_in_second(&start_time, &end_time) << "s)." << endl; }
+
+  if(strcmp(trajectory_filename, "")) {
+    ofstream out_traj(trajectory_filename);
+    tracker->write_trajectories(&out_traj);
+    if(verbose) { cout << "Wrote " << trajectory_filename << "." << endl; }
+  } else {
+    tracker->write_trajectories(&cout);
+  }
+
+  if(strcmp(graph_filename, "") != 0) {
+    ofstream out_dot(graph_filename);
+    tracker->print_graph_dot(&out_dot);
+    if(verbose) { cout << "Wrote " << graph_filename << "." << endl; }
   }
 
-  ifstream *in_tracker = new ifstream(argv[1]);
+  delete tracker;
+}
 
-  if(in_tracker->good()) {
+static struct option long_options[] = {
+  { "trajectory-file", 1, 0, 't' },
+  { "graph-file", 1, 0, 'g' },
+  { "help", no_argument, 0, 'h' },
+  { "verbose", no_argument, 0, 'v' },
+  { 0, 0, 0, 0 }
+};
 
-    MTPTracker *tracker = new MTPTracker();
+int main(int argc, char **argv) {
+  int c;
+  int error = 0, show_help = 0;
 
-    cout << "Reading " << argv[1] << "." << endl;
-    tracker->read(in_tracker);
+  // strncpy(trajectory_filename, "result.trj", FILENAME_SIZE);
+  strncpy(trajectory_filename, "", FILENAME_SIZE);
+  strncpy(graph_filename, "", FILENAME_SIZE);
+  verbose = 0;
 
-    cout << "Building the graph ... "; cout.flush();
-    gettimeofday(&start_time, 0);
-    tracker->build_graph();
-    gettimeofday(&end_time, 0);
-    cout << "done (" << diff_in_second(&start_time, &end_time) << "s)." << endl;
+  while ((c = getopt_long(argc, argv, "t:g:hv",
+                          long_options, NULL)) != -1) {
 
-    cout << "Tracking ... "; cout.flush();
-    gettimeofday(&start_time, 0);
-    tracker->track();
-    gettimeofday(&end_time, 0);
-    cout << "done (" << diff_in_second(&start_time, &end_time) << "s)." << endl;
+    switch(c) {
 
-    ofstream out_traj("result.trj");
-    tracker->write_trajectories(&out_traj);
-    cout << "Wrote result.trj" << endl;
+    case 't':
+      strncpy(trajectory_filename, optarg, FILENAME_SIZE);
+      break;
 
-    ofstream out_dot("graph.dot");
-    tracker->print_graph_dot(&out_dot);
-    cout << "Wrote graph.dot" << endl;
+    case 'g':
+      strncpy(graph_filename, optarg, FILENAME_SIZE);
+      break;
 
-    delete tracker;
+    case 'h':
+      show_help = 1;
+      break;
 
-  } else {
+    case 'v':
+      verbose = 1;
+      break;
+
+    default:
+      error = 1;
+      break;
+    }
+  }
 
-    cerr << "Can not open " << argv[1] << endl;
+  if(error) {
+    usage(&cerr);
     exit(EXIT_FAILURE);
+  }
 
+  if(show_help) {
+    usage(&cout);
+    exit(EXIT_SUCCESS);
   }
 
-  delete in_tracker;
+  if(optind < argc) {
+    ifstream *file_in_tracker = new ifstream(argv[optind]);
+    if(file_in_tracker->good()) {
+      do_tracking(file_in_tracker);
+    } else {
+      cerr << "Can not open " << argv[optind] << endl;
+      exit(EXIT_FAILURE);
+    }
+    delete file_in_tracker;
+  } else {
+    do_tracking(&cin);
+  }
 
   exit(EXIT_SUCCESS);
 }
-- 
2.39.5