comm: almost total rewrite; add testsuite

[oweals/busybox.git] / coreutils / seq.c

diff --git a/coreutils/seq.c b/coreutils/seq.c
index 8006be83dc5227481906dd08ce75ac4ef9bab194..01d71f256b9bc4df5c0105f6c773a933f6e252bd 100644 (file)
--- a/coreutils/seq.c
+++ b/coreutils/seq.c
@@ -2,50 +2,39 @@
 /*
  * seq implementation for busybox
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of version 2 of the GNU General Public License as
- *  published by the Free Software Foundation.
+ * Copyright (C) 2004, Glenn McGrath
  *
- *  This program 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 Library General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include "busybox.h"
+#include "libbb.h"
+
+/* This is a NOFORK applet. Be very careful! */
+
 
-extern int seq_main(int argc, char **argv)
+int seq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int seq_main(int argc, char **argv)
 {
-       double last;
-       double first = 1;
-       double increment = 1;
-       double i;
+       double last, increment, i;
 
-       if (argc == 4) {
-               first = atof(argv[1]);
-               increment = atof(argv[2]);
-       } else if (argc == 3) {
-               first = atof(argv[1]);
-       } else if (argc != 2) {
-               bb_show_usage();
+       i = increment = 1;
+       switch (argc) {
+               case 4:
+                       increment = atof(argv[2]);
+               case 3:
+                       i = atof(argv[1]);
+               case 2:
+                       last = atof(argv[argc-1]);
+                       break;
+               default:
+                       bb_show_usage();
        }
-       last = atof(argv[argc - 1]);
 
        /* You should note that this is pos-5.0.91 semantics, -- FK. */
-       if ((first > last) && (increment > 0)) {
-               return EXIT_SUCCESS;
-       }
-
-       for (i = first; ((first <= last) ? (i <= last) : (i >= last));
-            i += increment) {
+       while ((increment > 0 && i <= last) || (increment < 0 && i >= last)) {
                printf("%g\n", i);
+               i += increment;
        }
 
-       return EXIT_SUCCESS;
+       return fflush(stdout);
 }