--- /dev/null
+/*****************************************************************
+ * SQUID - a library of functions for biological sequence analysis
+ * Copyright (C) 1992-2002 Washington University School of Medicine
+ *
+ * This source code is freely distributed under the terms of the
+ * GNU General Public License. See the files COPYRIGHT and LICENSE
+ * for details.
+ *****************************************************************/
+
+/* sre_ctype.c
+ *
+ * For portability. Some systems have functions tolower, toupper
+ * as macros (for instance, MIPS M-2000 RISC/os!)
+ *
+ * RCS $Id: sre_ctype.c 217 2011-03-19 10:27:10Z andreas $ (Original squid RCS Id: sre_ctype.c,v 1.3 2001/09/02 23:43:19 eddy Exp)
+ */
+
+#include <ctype.h>
+#include "squid.h"
+
+int
+sre_tolower(int c)
+{
+ if (isupper(c)) return tolower(c);
+ else return c;
+}
+
+int
+sre_toupper(int c)
+{
+ if (islower(c)) return toupper(c);
+ else return c;
+}
+