CPPLapack Code

//=============================================================================
/*! _dgsmatrix+dgbmatrix operator */
inline _dgematrix operator+(const _dgsmatrix& matA, const dgbmatrix& matB)
{
#ifdef  CPPL_VERBOSE
  std::cerr << "# [MARK] operator+(const _dgsmatrix&, const dgbmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
  
#ifdef  CPPL_DEBUG
  if(matA.N!=matB.N || matA.M!=matB.M){
    std::cerr << "[ERROR] operator+(const _dgsmatrix&, const dgbmatrix&)" << std::endl
              << "These two matrises can not make a summation." << std::endl
              << "Your input was (" << matA.M << "x" << matA.N << ") + (" << matB.M << "x" << matB.N << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  dgematrix newmat( matA.to_dgematrix() );
  
  for(long i=0; i<matB.M; i++){
    for(long j=std::max(long(0),i-matB.KL); j<std::min(matB.N,i+matB.KU+1); j++){
      newmat(i,j)+=matB(i,j);
    }
  }
  
  matA.destroy();
  return _(newmat);
}

//=============================================================================
/*! _dgsmatrix-dgbmatrix operator */
inline _dgematrix operator-(const _dgsmatrix& matA, const dgbmatrix& matB)
{
#ifdef  CPPL_VERBOSE
  std::cerr << "# [MARK] operator-(const _dgsmatrix&, const dgbmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
  
#ifdef  CPPL_DEBUG
  if(matA.N!=matB.N || matA.M!=matB.M){
    std::cerr << "[ERROR] operator+(const _dgsmatrix&, const dgbmatrix&)" << std::endl
              << "These two matrises can not make a summation." << std::endl
              << "Your input was (" << matA.M << "x" << matA.N << ") + (" << matB.M << "x" << matB.N << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  dgematrix newmat( matA.to_dgematrix() );
  
  for(long i=0; i<matB.M; i++){
    for(long j=std::max(long(0),i-matB.KL); j<std::min(matB.N,i+matB.KU+1); j++){
      newmat(i,j)-=matB(i,j);
    }
  }
  
  matA.destroy();
  return _(newmat);
}

//=============================================================================
/*! _dgsmatrix*dgbmatrix operator */
inline _dgematrix operator*(const _dgsmatrix& matA, const dgbmatrix& matB)
{
#ifdef  CPPL_VERBOSE
  std::cerr << "# [MARK] operator*(const _dgsmatrix&, const dgbmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
  
#ifdef  CPPL_DEBUG
  if(matA.N!=matB.M){
    std::cerr << "[ERROR] operator*(const _dgsmatrix&, const dgbmatrix&)" << std::endl
              << "These two matrises can not make a product." << std::endl
              << "Your input was (" << matA.M << "x" << matA.N << ") * (" << matB.M << "x" << matB.N << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  dgematrix newmat( matA.M, matB.N );
  newmat.zero();
  
  for(std::vector<dcomponent>::const_iterator it=matA.Data.begin(); it!=matA.Data.end(); it++){
    for(long j=std::max(long(0),it->j-matB.KL); j<std::min(matB.N,it->j+matB.KU+1); j++){
      newmat(it->i,j) += it->v*matB(it->j,j);
    }
  }
  
  matA.destroy();
  return _(newmat);
}