--- a/th_string.c	Wed Feb 18 13:28:29 2015 +0200
+++ b/th_string.c	Wed Feb 18 21:13:44 2015 +0200
@@ -574,6 +574,28 @@
 }
 
 
+BOOL th_get_boolean(const char *str, BOOL *value)
+{
+    if (!th_strcasecmp(str, "yes") ||
+        !th_strcasecmp(str, "true") ||
+        !th_strcasecmp(str, "1"))
+    {
+        *value = TRUE;
+        return TRUE;
+    }
+    else
+    if (!th_strcasecmp(str, "no") ||
+        !th_strcasecmp(str, "false") ||
+        !th_strcasecmp(str, "0"))
+    {
+        *value = FALSE;
+        return TRUE;
+    }
+    else
+        return FALSE;
+}
+
+
 static void th_pad(FILE *outFile, int count)
 {
     while (count--)