Visualization Library 2.1.0

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

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MD5CheckSum.cpp
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31 
32 #include <vlCore/MD5CheckSum.hpp>
33 #include <vlCore/VirtualFile.hpp>
34 #include <cstdio>
35 #include <cstring>
36 
37 #include "external/md5/md5.c"
38 
39 using namespace vl;
40 
41 std::string MD5CheckSum::toStdString() const
42 {
43  char sum[33];
44  sprintf ( sum, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
45  mMD5[0], mMD5[1], mMD5[2], mMD5[3], mMD5[4], mMD5[5], mMD5[6], mMD5[7],
46  mMD5[8], mMD5[9], mMD5[10], mMD5[11], mMD5[12], mMD5[13], mMD5[14], mMD5[15] );
47  return sum;
48 }
49 //-----------------------------------------------------------------------------
50 void MD5CheckSum::compute(void* buffer, int len)
51 {
52  MD5Context md5context;
53  MD5Init(&md5context);
54  MD5Update(&md5context, (unsigned char*)buffer, len);
55  MD5Final(mMD5,&md5context);
56 }
57 //-----------------------------------------------------------------------------
59 {
60  const int CHUNK_SIZE = 128*1024;
61  std::vector<unsigned char> buffer;
62  buffer.resize(CHUNK_SIZE);
63  MD5Context md5context;
64  MD5Init(&md5context);
65 
66  for( unsigned bytes_read = (unsigned)file->read(&buffer.front(), CHUNK_SIZE);
67  bytes_read;
68  bytes_read = (unsigned)file->read(&buffer.front(), CHUNK_SIZE) )
69  {
70  MD5Update(&md5context, &buffer.front(), bytes_read);
71  }
72 
73  MD5Final(mMD5,&md5context);
74 }
75 //-----------------------------------------------------------------------------
long long read(void *buffer, long long byte_count)
Reads byte_count bytes from a file. Returns the number of bytes actually read.
Definition: VirtualFile.cpp:82
An abstract class representing a file.
Definition: VirtualFile.hpp:60
void compute(void *buffer, int len)
Definition: MD5CheckSum.cpp:50
std::string toStdString() const
Definition: MD5CheckSum.cpp:41
Visualization Library main namespace.
unsigned char mMD5[16]
Definition: MD5CheckSum.hpp:66