1 files changed, 36 insertions, 0 deletions
diff --git a/contrib/gperf/lib/hash.cc b/contrib/gperf/lib/hash.cc
new file mode 100644
index 0000000..72a287f
--- /dev/null
+++ b/contrib/gperf/lib/hash.cc
@@ -0,0 +1,36 @@
+/* 
+Copyright (C) 1990 Free Software Foundation
+    written by Doug Lea (dl@rocky.oswego.edu)
+
+This file is part of the GNU C++ Library.  This library is free
+software; you can redistribute it and/or modify it under the terms of
+the GNU Library General Public License as published by the Free
+Software Foundation; either version 2 of the License, or (at your
+option) any later version.  This library 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 Library General Public License for more details.
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <hash.h>
+
+/*
+ some useful hash functions
+*/
+
+unsigned int hashpjw (const char* x) // From Dragon book, p436
+{
+  unsigned int h = 0;
+  unsigned int g;
+
+  while (*x != 0)
+  {
+    h = (h << 4) + (unsigned char) *x++;
+    if ((g = h & 0xf0000000) != 0)
+      h = (h ^ (g >> 24)) ^ g;
+  }
+  return h;
+}