1 files changed, 14 insertions, 0 deletions
diff --git a/runtime/klee-libc/tolower.c b/runtime/klee-libc/tolower.c
new file mode 100644
index 00000000..265f5deb
--- /dev/null
+++ b/runtime/klee-libc/tolower.c
@@ -0,0 +1,14 @@
+//===-- tolower.c ---------------------------------------------------------===//
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+int tolower(int ch) {
+  if ( (unsigned int)(ch - 'A') < 26u )
+    ch -= 'A' - 'a';
+  return ch;
+}