From: Jim Meyering <jim@meyering.net>
Date: Sun, 2 Oct 1994 22:50:11 +0000 (+0000)
Subject: Initial revision
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de20ab0a2c7a38fa0109e1e9a5a729e4fa6c0313;p=pspp

Initial revision
---

diff --git a/lib/long-options.c b/lib/long-options.c
new file mode 100644
index 0000000000..c1071bfaf7
--- /dev/null
+++ b/lib/long-options.c
@@ -0,0 +1,79 @@
+/* Utility to accept --help and --version options as unobtrusively as possible.
+   Copyright (C) 1993, 1994 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   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 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Jim Meyering (meyering@comco.com) */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <getopt.h>
+#include "long-options.h"
+
+static struct option const long_options[] =
+{
+  {"help", no_argument, 0, 'h'},
+  {"version", no_argument, 0, 'v'},
+  {0, 0, 0, 0}
+};
+
+/* Process long options --help and --version, but only if argc == 2.
+   Be careful not to gobble up `--'.  */
+
+void
+parse_long_options (argc, argv, command_name, version_string, usage)
+     int argc;
+     char **argv;
+     const char *command_name;
+     const char *version_string;
+     void (*usage)();
+{
+  int c;
+  int saved_opterr;
+  int saved_optind;
+
+  saved_opterr = opterr;
+  saved_optind = optind;
+
+  /* Don't print an error message for unrecognized options.  */
+  opterr = 0;
+
+  if (argc == 2
+      && (c = getopt_long (argc, argv, "+", long_options, (int *) 0)) != EOF)
+    {
+      switch (c)
+	{
+	case 'h':
+	  (*usage) (0);
+
+	case 'v':
+	  printf ("%s - %s\n", command_name, version_string);
+	  exit (0);
+	
+	default:
+	  /* Don't process any other long-named options.  */
+	  break;
+	}
+    }
+
+  /* Restore previous value.  */
+  opterr = saved_opterr;
+
+  /* Restore optind in case it has advanced past a leading `--'.  */
+  optind = saved_optind;
+}
diff --git a/lib/long-options.h b/lib/long-options.h
new file mode 100644
index 0000000000..220305ce6e
--- /dev/null
+++ b/lib/long-options.h
@@ -0,0 +1,11 @@
+#ifndef __P
+#if defined (__GNUC__) || (defined (__STDC__) && __STDC__)
+#define __P(args) args
+#else
+#define __P(args) ()
+#endif  /* GCC.  */
+#endif  /* Not __P.  */
+
+void
+  parse_long_options __P ((int _argc, char **_argv, const char *_command_name,
+			   const char *_version_string, void (*_usage) (int)));