[brlcad-commits] SF.net SVN: brlcad:[55398] brlcad/trunk/src/anim/anim_sort.c

[<car...@us...>]

Revision: 55398
          http://sourceforge.net/p/brlcad/code/55398
Author:   carlmoore
Date:     2013-05-13 18:20:22 +0000 (Mon, 13 May 2013)
Log Message:
-----------
Usage, h, ?

Modified Paths:
--------------
    brlcad/trunk/src/anim/anim_sort.c

Modified: brlcad/trunk/src/anim/anim_sort.c
===================================================================
--- brlcad/trunk/src/anim/anim_sort.c	2013-05-13 18:05:48 UTC (rev 55397)
+++ brlcad/trunk/src/anim/anim_sort.c	2013-05-13 18:20:22 UTC (rev 55398)
@@ -29,14 +29,14 @@
 
 #include "common.h"
 
-#include <stdio.h>
+#include "bio.h"
 #include <string.h>
 #include <stdlib.h>
 
 #include "bu.h"
 
 
-#define OPT_STR "ci"
+#define OPT_STR "cih?"
 
 #define MAXLEN 50 /*maximum length of lines to be read */
 #define MAXLINES 30		/* maximum length of lines to be stored*/
@@ -44,7 +44,11 @@
 int suppressed;		/* flag: suppress printing of 'clean;' commands */
 int incremental;	/* flag: order for incremental time resolution */
 
+void usage(void){
+	fprintf(stderr,"Usage: anim_fly [-f factor] [-r] [-p integer] [-b max_bank_angle] [-s step] in.table out.table\n");
+}
 
+
 int get_args(int argc, char **argv)
 {
 
@@ -60,7 +64,6 @@
 		incremental = 1;
 		break;
 	    default:
-		fprintf(stderr, "Unknown option: -%c\n", c);
 		return 0;
 	}
     }
@@ -77,9 +80,15 @@
     char line[MAXLEN];
     char pbuffer[MAXLEN*MAXLINES];
 
+    if (argc == 1 && isatty(fileno(stdin)) && isatty(fileno(stdout))){
+	usage();
+    	return 0;
+    }
 
-    if (!get_args(argc, argv))
-	fprintf(stderr, "Get_args error\n");
+    if (!get_args(argc, argv)){
+	usage();
+	return 0;
+    }
 
     /* copy any lines preceding the first "start" command */
     last_pos = bu_ftell(stdin);

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