add()

void GSE2::waveform::TCHK2::add

(

const intT &

value

)

Add a value to the checksum.

This function adds the sample value to the checksum.

Parameters

value

sample value to add

Definition at line 77 of file gsexx_TCHK2.cc.

References GSE2::waveform::helper::abs(), Msum, and value().

Referenced by GSE2::waveform::TDAT2sum::add(), and GSE2::tests::test_chk2().

{
  const intT modulo=100000000; // a one and eight zeros
  intT sample_value=value;

  // check for sample value overflow 
  if (helper::abs(sample_value) >= modulo)
  {
    sample_value = sample_value - int(sample_value/modulo)*modulo;
  }

  // add the sample value to the checksum
  Msum += sample_value;

  // check for checksum overflow
  if (helper::abs(Msum) >= modulo)
  {
    Msum = Msum - int(Msum/modulo)*modulo;
  }
}

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