From 9c336eed8ce72bdcd42aaebcb4761e2668e75bed Mon Sep 17 00:00:00 2001
From: tTh <tth@konrad.lan>
Date: Thu, 27 Apr 2023 23:59:59 +0200
Subject: [PATCH] adding command line options

---
 tools/read_obj.c | 42 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 6 deletions(-)

diff --git a/tools/read_obj.c b/tools/read_obj.c
index 10a5197..a16a659 100644
--- a/tools/read_obj.c
+++ b/tools/read_obj.c
@@ -5,6 +5,7 @@
 #include	<stdio.h>
 #include	<stdlib.h>
 #include	<libgen.h>		// for basename(3)
+#include        <unistd.h>
 
 #include	"../bubulles.h"
 #include	"../edges.h"
@@ -13,22 +14,51 @@
 
 int	verbosity = 0;
 
+/* --------------------------------------------------------------------- */
+void help(void)
+{
+printf("nothing to say...\n");
+exit(0);
+}
+/* --------------------------------------------------------------------- */
+
 int main(int argc, char *argv[])
 {
-int		foo;
-char		*fname;		/* see manpage basename(3) */
+int		foo, opt;
+// char		*fname;			/* see manpage basename(3) */
 
 fprintf(stderr, "\n### READ_OBJ       compiled %s at %s\n", __DATE__, __TIME__);
 
-if (2 != argc) {
+if (1 == argc) {
 	bubulles_version(1);
 	exit(0);
 	}
 
-verbosity = 0;
+while ((opt = getopt(argc, argv, "hv")) != -1) {
+	switch(opt) {
+		case 'h':
+			help();			break;
+		case 'v':
+			verbosity++;		break;
+		default:
+			exit(1);
+			break;
+		}
+	}
 
-foo = try_to_read_an_OBJ_file(argv[1], 0);
-fprintf(stderr, "try to read '%s' -> %d\n", argv [1], foo);
+
+if (optind < argc) {
+	// fprintf(stderr, "ARG = %s\n", argv[optind]);
+	foo = try_to_read_an_OBJ_file(argv[optind], 0);
+	if (foo) {
+		fprintf(stderr, "Error number %d on '%s'\n", foo, argv[optind]);
+		exit(1);
+		}
+	}
+else	{
+	fprintf(stderr, "%s need a input filename\n", argv[0]);
+	exit(1);
+	}
 
 return 0;
 }