From 0f1d005a2a7123f4077dbe3ff446ced8f240f1f8 Mon Sep 17 00:00:00 2001
From: Magnus Lundborg <lundborg.magnus@gmail.com>
Date: Mon, 4 Nov 2013 14:18:29 +0100
Subject: Let CMake check endianness for MD5. Remove GROMACS header.


diff --git a/include/md5.h b/include/md5.h
index 5aef902..5776af8 100644
--- a/include/md5.h
+++ b/include/md5.h
@@ -1,3 +1,7 @@
+
+/* This file has been modified in the TNG library distribution. Modifications
+ * are marked below. */
+
 /*
   Copyright (C) 1999, 2002 Aladdin Enterprises.  All rights reserved.
 
@@ -49,6 +53,9 @@
 #ifndef md5_INCLUDED
 #  define md5_INCLUDED
 
+
+/* The comment below does not apply to the version included in the TNG
+ * library. */
 /*
  * This package supports both compile-time and run-time determination of CPU
  * byte order.  If ARCH_IS_BIG_ENDIAN is defined as 0, the code will be
@@ -70,16 +77,20 @@ typedef struct md5_state_s {
 } md5_state_t;
 
 #ifdef __cplusplus
-extern "C" 
+extern "C"
 {
 #endif
 
+/* The USE_WINDOWS define below was added in TNG library distribution of this
+ * file in order to compile properly in MSVC */
 #ifndef USE_WINDOWS
 #if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
 #define USE_WINDOWS
 #endif /* win32... */
 #endif /* not defined USE_WINDOWS */
 
+/* The DECLSPECDLLEXPORT define below was added in the TNG library distribution
+ * of this file. It is also used in the function declarations. */
 #ifndef DECLSPECDLLEXPORT
 #ifdef USE_WINDOWS
 #define DECLSPECDLLEXPORT __declspec(dllexport)
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 20923d8..45e13d2 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -15,6 +15,14 @@ if(HAVE_INTTYPES_H)
   set_property(TARGET tng_io APPEND PROPERTY COMPILE_DEFINITIONS USE_STD_INTTYPES_H)
 endif()
 
+# This test is for md5. The TNG library itself determines the actual byte order -
+# not just if it is small or big endian.
+include(TestBigEndian)
+test_big_endian(TNG_INTEGER_BIG_ENDIAN)
+if(TNG_INTEGER_BIG_ENDIAN)
+  set_property(TARGET tng_io APPEND PROPERTY COMPILE_DEFINITIONS TNG_INTEGER_BIG_ENDIAN)
+endif()
+
 if(ZLIB_FOUND)
   set_property(TARGET tng_io APPEND PROPERTY COMPILE_DEFINITIONS USE_ZLIB)
   target_link_libraries(tng_io tng_compress ${ZLIB_LIBRARIES})
diff --git a/src/lib/md5.c b/src/lib/md5.c
index 8ea5b13..bd11de3 100644
--- a/src/lib/md5.c
+++ b/src/lib/md5.c
@@ -1,46 +1,16 @@
-/*
- *
- *             This source code is distributed with
- *
- *                 G   R   O   M   A   C   S
- *
- *          GROningen MAchine for Chemical Simulations
- *
- *                           VERSION 4.5
- * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
- * Copyright (c) 1991-2010, The GROMACS development team,
- * check out http://www.gromacs.org for more information.
- *
- * Gromacs 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.
- *
- * If you want to redistribute modifications, please consider that
- * scientific software is very special. Version control is crucial -
- * bugs must be traceable. We will be happy to consider code for
- * inclusion in the official distribution, but derived work must not
- * be called official GROMACS. Details are found in the README & COPYING
- * files - if they are missing, get the official version at www.gromacs.org.
- *
- * To help us fund GROMACS development, we humbly ask that you cite
- * the papers on the package - you can find them in the top README file.
- *
- * For more info, check our website at http://www.gromacs.org
- *
- * And Hey:
- * GROningen Mixture of Alchemy and Childrens' Stories
- */
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
+/* This file has been modified in the TNG library distribution. Modifications
+ * are marked below. */
 
-#ifdef GMX_INTEGER_BIG_ENDIAN
+/* The define below was added in the TNG library distribution of this file. */
+#ifdef TNG_INTEGER_BIG_ENDIAN
 #define ARCH_IS_BIG_ENDIAN 1
 #else
 #define ARCH_IS_BIG_ENDIAN 0
 #endif
 
+/* The defines below were added in TNG library distribution of this file
+ * in order to compile properly in MSVC */
+
 #ifndef USE_WINDOWS
 #if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
 #define USE_WINDOWS
@@ -181,6 +151,7 @@
 #define T63    0x2ad7d2bb
 #define T64 /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)
 
+/* In the TNG library inline has been changed to TNG_INLINE */
 static TNG_INLINE void
 md5_process(md5_state_t *pms, const md5_byte_t *data /*[64]*/)
 {
-- 
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