util-vserver-0.30.208

[util-vserver.git] / lib_internal / util-isnumber.c

diff --git a/lib_internal/util-isnumber.c b/lib_internal/util-isnumber.c
new file mode 100644 (file)
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--- /dev/null
+++ b/lib_internal/util-isnumber.c
@@ -0,0 +1,38 @@
+// $Id: util-isnumber.c,v 1.1 2005/07/04 22:35:47 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2005 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//  
+// 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; version 2 of the License.
+//  
+// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "util.h"
+
+bool
+isNumber(char const *str, signed long *result)
+{
+  char *       errptr;
+  signed long  val;
+
+  val = strtol(str, &errptr, 0);
+  if (*errptr!='\0' || errptr==str)
+    return false;
+  else {
+    if (result) *result = val;
+    return true;
+  }
+}