1 files changed, 53 insertions, 0 deletions
diff --git a/boost/compute/detail/sha1.hpp b/boost/compute/detail/sha1.hpp
new file mode 100644
index 0000000000..5685fa4407
--- /dev/null
+++ b/boost/compute/detail/sha1.hpp
@@ -0,0 +1,53 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_DETAIL_SHA1_HPP
+#define BOOST_COMPUTE_DETAIL_SHA1_HPP
+
+#include <sstream>
+#include <iomanip>
+#include <boost/uuid/sha1.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+// Accumulates SHA1 hash of the passed strings.
+class sha1 {
+    public:
+        sha1(const std::string &s = "") {
+            if (!s.empty()) this->process(s);
+        }
+
+        sha1& process(const std::string &s) {
+            h.process_bytes(s.c_str(), s.size());
+            return *this;
+        }
+
+        operator std::string() {
+            unsigned int digest[5];
+            h.get_digest(digest);
+
+            std::ostringstream buf;
+            for(int i = 0; i < 5; ++i)
+                buf << std::hex << std::setfill('0') << std::setw(8) << digest[i];
+
+            return buf.str();
+        }
+    private:
+        boost::uuids::detail::sha1 h;
+};
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+
+#endif // BOOST_COMPUTE_DETAIL_SHA1_HPP