Checksum.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.7.0
// ----------------------------------------------------------------------------
// pcl/Checksum.h - Released 2024-06-18T15:48:54Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
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// ----------------------------------------------------------------------------
 
#ifndef __PCL_Checksum_h
#define __PCL_Checksum_h
 
 
#include <pcl/Defs.h>
#include <pcl/Diagnostics.h>
 
#include <pcl/ByteArray.h>
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
size_type PCL_FUNC inline Checksum( const void* data, size_type length )
{
   PCL_PRECONDITION( data != nullptr )
   size_type S = 0;
   for ( const uint8* p = (const uint8*)data, * p1 = p+length; p < p1; ++p )
   {
      uint8 b = *p;
      if ( b & 0x01 ) ++S;
      if ( b & 0x02 ) ++S;
      if ( b & 0x04 ) ++S;
      if ( b & 0x08 ) ++S;
      if ( b & 0x10 ) ++S;
      if ( b & 0x20 ) ++S;
      if ( b & 0x40 ) ++S;
      if ( b & 0x80 ) ++S;
   }
   return S;
}
 
template <class C> inline
uint32 Checksum( const C& data )
{
   return Checksum( data.Begin(), sizeof( *(data.Begin()) )*data.Length() );
}
 
uint32 PCL_FUNC CRC32( const void* data, size_type length );
 
template <class C> inline
uint32 CRC32( const C& data )
{
   return CRC32( data.Begin(), sizeof( *(data.Begin()) )*data.Length() );
}
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif   // __PCL_Checksum_h
 
// ----------------------------------------------------------------------------
// EOF pcl/Checksum.h - Released 2024-06-18T15:48:54Z