From 803524799631bcc96ee1fa7e194516fb23d8d9b3 Mon Sep 17 00:00:00 2001
From: Adam NAILI
Date: Tue, 9 Jan 2018 14:27:48 +0100
Subject: Implementing option --help handling

---
 src/main.c | 57 +++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 41 insertions(+), 16 deletions(-)

diff --git a/src/main.c b/src/main.c
index 86f071d..7757f9a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,25 +1,50 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
 #include "gui/gui.h"
 #include "MLV/MLV_path.h"
 
 int main(int argc, char **argv) {
-  if (argc < 3) {
-    fprintf(stderr, "Not enough argument (2 correct pathfiles required)\n");
-    exit(-1);
-  }
-  if (argc > 3) {
-    fprintf(stderr, "Too much arguments (2 correct pathfiles required)\n");
-    exit(-2);
-  }
-  if (!(MLV_path_is_a_file(argv[1])) || !(MLV_path_is_a_file(argv[2]))) {
-    fprintf(stderr, "One path is incorrect\n");
-    exit(-3);
+  int opt = 0;
+  int help = -1;
+  static struct option long_options[] = {
+    {"help", 0, 0, 'h'},
+    {0, 0, 0, 0}
   };
-  GUI *gui = gui_create(argv[1], argv[2]);
-  while (mode != EXITING) {
-    gui_handle_event(gui);
+  int long_index = 0;
+  /*Option handling*/
+  while ((opt = getopt_long_only(argc, argv, "h", long_options, &long_index)) != -1) {
+    switch (opt) {
+      case 'h':
+        help = 0;
+        break;
+      default:
+        exit(EXIT_FAILURE);
+    }
+  }
+  if (help == 0) {
+    printf(
+      "--Morphing's Help--\nTo use the morphing, you need to put two correct paths to image files.\n\nCorrect image format :\nICO(Icon)/CUR(Cursor)/BMP, PNM (PPM/PGM/PBM), XPM, LBM(IFF ILBM), PCX, GIF, JPEG, PNG, TGA, TIFF, and XV.\n\nMorphing made by:\n Pacien TRAN-GIRARD and Adam NAILI\n");
+  } else {
+    int nbArg = argc - optind;
+    if (nbArg < 2) {
+      fprintf(stderr, "Not enough argument (2 correct pathfiles required)\n");
+      exit(-1);
+    }
+    if (nbArg > 2) {
+      fprintf(stderr, "Too much arguments (2 correct pathfiles required)\n");
+      exit(-2);
+    }
+    if (!(MLV_path_is_a_file(argv[optind])) || !(MLV_path_is_a_file(argv[optind + 1]))) {
+      fprintf(stderr, "One path is incorrect\n");
+      exit(-3);
+    };
+    GUI *gui = gui_create(argv[optind], argv[optind + 1]);
+    while (mode != EXITING) {
+      gui_handle_event(gui);
+    }
+    gui_destroy(gui);
   }
-  gui_destroy(gui);
-  return 0;
+  exit(EXIT_SUCCESS);
 }
-- 
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