diff --git a/progs/transform.c b/progs/transform.c
new file mode 100644
index 0000000..c0557f0
--- /dev/null
+++ b/progs/transform.c
@@ -0,0 +1,79 @@
+/****************************************************************************
+ * Copyright (c) 2009-2010,2011 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey                                                *
+ ****************************************************************************/
+#include <progs.priv.h>
+#include <string.h>
+
+#include <transform.h>
+
+MODULE_ID("$Id: transform.c,v 1.3 2011/05/14 22:41:17 tom Exp $")
+
+#ifdef SUFFIX_IGNORED
+static void
+trim_suffix(const char *a, size_t *len)
+{
+    const char ignore[] = SUFFIX_IGNORED;
+
+    if (sizeof(ignore) != 0) {
+	bool trim = FALSE;
+	size_t need = (sizeof(ignore) - 1);
+
+	if (*len > need) {
+	    size_t first = *len - need;
+	    size_t n;
+	    trim = TRUE;
+	    for (n = first; n < *len; ++n) {
+		if (tolower(UChar(a[n])) != tolower(UChar(ignore[n - first]))) {
+		    trim = FALSE;
+		    break;
+		}
+	    }
+	    if (trim) {
+		*len -= need;
+	    }
+	}
+    }
+}
+#else
+#define trim_suffix(a, len)	/* nothing */
+#endif
+
+bool
+same_program(const char *a, const char *b)
+{
+    size_t len_a = strlen(a);
+    size_t len_b = strlen(b);
+
+    trim_suffix(a, &len_a);
+    trim_suffix(b, &len_b);
+
+    return (len_a == len_b) && (strncmp(a, b, len_a) == 0);
+}