# Visualization Library

A lightweight C++ OpenGL middleware for 2D/3D graphics

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# D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlCore/MD5CheckSum.cpp

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    00001 /**************************************************************************************/
    00002 /*                                                                                    */
    00003 /*  Visualization Library                                                             */
    00004 /*  http://www.visualizationlibrary.org                                               */
    00005 /*                                                                                    */
    00006 /*  Copyright (c) 2005-2010, Michele Bosi                                             */
    00007 /*  All rights reserved.                                                              */
    00008 /*                                                                                    */
    00009 /*  Redistribution and use in source and binary forms, with or without modification,  */
    00010 /*  are permitted provided that the following conditions are met:                     */
    00011 /*                                                                                    */
    00012 /*  - Redistributions of source code must retain the above copyright notice, this     */
    00013 /*  list of conditions and the following disclaimer.                                  */
    00014 /*                                                                                    */
    00015 /*  - Redistributions in binary form must reproduce the above copyright notice, this  */
    00016 /*  list of conditions and the following disclaimer in the documentation and/or       */
    00017 /*  other materials provided with the distribution.                                   */
    00018 /*                                                                                    */
    00019 /*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND   */
    00020 /*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED     */
    00021 /*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE            */
    00022 /*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR  */
    00023 /*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    */
    00024 /*  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;      */
    00025 /*  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON    */
    00026 /*  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT           */
    00027 /*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS     */
    00028 /*  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                      */
    00029 /*                                                                                    */
    00030 /**************************************************************************************/
    00031
    00032 #include <vlCore/MD5CheckSum.hpp>
    00033 #include <vlCore/VirtualFile.hpp>
    00034 #include <cstdio>
    00035 #include <cstring>
    00036
    00037 #include "3rdparty/md5/md5.c"
    00038
    00039 using namespace vl;
    00040
    00041 std::string MD5CheckSum::toStdString() const
    00042 {
    00043   char sum[33];
    00044   sprintf ( sum, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
    00045     mMD5[0], mMD5[1], mMD5[2],  mMD5[3],  mMD5[4],  mMD5[5],  mMD5[6],  mMD5[7],
    00046     mMD5[8], mMD5[9], mMD5[10], mMD5[11], mMD5[12], mMD5[13], mMD5[14], mMD5[15] );
    00047   return sum;
    00048 }
    00049 //-----------------------------------------------------------------------------
    00050 void MD5CheckSum::compute(void* buffer, int len)
    00051 {
    00052   MD5Context md5context;
    00053   MD5Init(&md5context);
    00054   MD5Update(&md5context, (unsigned char*)buffer, len);
    00055   MD5Final(mMD5,&md5context);
    00056 }
    00057 //-----------------------------------------------------------------------------
    00058 void MD5CheckSum::compute(VirtualFile* file)
    00059 {
    00060   const int CHUNK_SIZE = 128*1024;
    00061   std::vector<unsigned char> buffer;
    00062   buffer.resize(CHUNK_SIZE);
    00063   MD5Context md5context;
    00064   MD5Init(&md5context);
    00065
    00066   for( unsigned bytes_read = (unsigned)file->read(&buffer.front(), CHUNK_SIZE);
    00067        bytes_read;
    00068        bytes_read = (unsigned)file->read(&buffer.front(), CHUNK_SIZE) )
    00069   {
    00070     MD5Update(&md5context, &buffer.front(), bytes_read);
    00071   }
    00072
    00073   MD5Final(mMD5,&md5context);
    00074 }
    00075 //-----------------------------------------------------------------------------

Visualization Library v2011.09.1162 Reference Documentation
Copyright 2005-2011 Michele Bosi. All rights reserved.
Updated on Thu Jan 26 2012 00:43:29.
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