From 94d3e79a8617f88dc0219cfdeedfa3147833719d Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 24 Jun 2019 14:43:36 +0200
Subject: Initialize at openlb-1-3

---
 src/io/base64.cpp | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/io/base64.cpp

(limited to 'src/io/base64.cpp')

diff --git a/src/io/base64.cpp b/src/io/base64.cpp
new file mode 100644
index 0000000..de373e0
--- /dev/null
+++ b/src/io/base64.cpp
@@ -0,0 +1,72 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2007 Jonas Latt
+ *  E-mail contact: info@openlb.net
+ *  The most recent release of OpenLB can be downloaded at
+ *  <http://www.openlb.net/>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public
+ *  License along with this program; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA  02110-1301, USA.
+*/
+
+#include "base64.h"
+#include "base64.hh"
+
+namespace olb {
+
+// All of the following is a workaround to the following problem: on a
+// 32-bit machine where unsigned int is the same as size_t, Base64Encoder
+// needs to be instantiated on one integer type only. On some 64-bit
+// platforms however, size_t is not equal to unsigned int. In that case,
+// Base64Encoder needs to be instantiated twice. It is however not
+// possible to instantiate this class first on unsigned int and then
+// on size_t, because this yields a double instantiation, and thus
+// an error, where these types are the same. To avoid this problem,
+// the chosen instantiation types are unsigned int and size_t where
+// these types are different, and unsigned char and unsigned int where
+// they are similar. A template-based if-then-else construct is used
+// to distinguish the two cases.
+
+template<bool areEqual> struct DistinctUint;
+
+template<>
+struct DistinctUint<true> {
+  typedef unsigned char T1;
+  typedef size_t T2;
+};
+
+template<>
+struct DistinctUint<false> {
+  typedef unsigned int T1;
+  typedef size_t T2;
+};
+
+typedef DistinctUint<sizeof(unsigned int)==sizeof(size_t)>::T1 T1;
+typedef DistinctUint<sizeof(unsigned int)==sizeof(size_t)>::T2 T2;
+
+template class Base64Encoder<bool>;
+template class Base64Encoder<float>;
+template class Base64Encoder<double>;
+template class Base64Encoder<T1>;
+template class Base64Encoder<T2>;
+template class Base64Encoder<unsigned char>;
+
+template class Base64Decoder<bool>;
+template class Base64Decoder<float>;
+template class Base64Decoder<double>;
+template class Base64Decoder<T1>;
+template class Base64Decoder<T2>;
+
+}
-- 
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