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/*  Visualization Library                                                             */
/*  http://visualizationlibrary.org                                                   */
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#ifndef MD5CheckSum_INCLUDE_ONCE
#define MD5CheckSum_INCLUDE_ONCE

#include <vlCore/link_config.hpp>
#include <string>
#include <string.h>

namespace vl
{
  class VirtualFile;

  /**
   * Computes the MD5 of a given buffer or VirtualFile.
  */
  class VLCORE_EXPORT MD5CheckSum
  {
  public:
    MD5CheckSum() { memset(mMD5, 0, 16); }

    const unsigned char* md5() const { return mMD5; }

    std::string toStdString() const;

    void compute(void* buffer, int len);

    void compute(VirtualFile* file);

    bool operator==(const MD5CheckSum& other) const { return memcmp(mMD5, other.mMD5, 16) == 0; }

    bool operator!=(const MD5CheckSum& other) const { return memcmp(mMD5, other.mMD5, 16) != 0; }

    bool operator< (const MD5CheckSum& other) const { return memcmp(mMD5, other.mMD5, 16) <  0; }

  protected:
    unsigned char mMD5[16];
  };
}

#endif