CPPLapack Code

//=============================================================================
/*! zgsmatrix+_zgematrix operator */
inline _zgematrix operator+(const zgsmatrix& matA, const _zgematrix& matB)
{CPPL_VERBOSE_REPORT;
#ifdef  CPPL_DEBUG
  if(matA.m!=matB.m || matA.n!=matB.n){
    ERROR_REPORT;
    std::cerr << "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
  
  const std::vector<zcomponent>::const_iterator matA_data_end =matA.data.end();
  for(std::vector<zcomponent>::const_iterator it=matA.data.begin(); it!=matA_data_end; it++){
    matB(it->i,it->j) += it->v;
  }
  
  return matB;
}

//=============================================================================
/*! zgsmatrix-_zgematrix operator */
inline _zgematrix operator-(const zgsmatrix& matA, const _zgematrix& matB)
{CPPL_VERBOSE_REPORT;
#ifdef  CPPL_DEBUG
  if(matA.m!=matB.m || matA.n!=matB.n){
    ERROR_REPORT;
    std::cerr << "These two matrises can not make a subtraction." << std::endl
              << "Your input was (" << matA.m << "x" << matA.n << ") - (" << matB.n << "x" << matB.n << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  //// change sign ////
  for(CPPL_INT i=0; i<matB.m*matB.n; i++){
    matB.array[i]=-matB.array[i];
  }
  
  //// add ////
  const std::vector<zcomponent>::const_iterator matA_data_end =matA.data.end();
  for(std::vector<zcomponent>::const_iterator it=matA.data.begin(); it!=matA_data_end; it++){
    matB(it->i,it->j) += it->v;
  }
  
  return matB;
}

//=============================================================================
/*! zgsmatrix*_zgematrix operator */
inline _zgematrix operator*(const zgsmatrix& matA, const _zgematrix& matB)
{CPPL_VERBOSE_REPORT;
#ifdef  CPPL_DEBUG
  if(matA.n!=matB.m){
    ERROR_REPORT;
    std::cerr << "These two matrises can not make a product." << std::endl
              << "Your input was (" << matA.m << "x" << matA.n << ") * (" << matB.n << "x" << matB.n << ")." << std::endl;
    exit(1);
  }
#endif//CPPL_DEBUG
  
  zgematrix newmat(matA.m, matB.n);
  newmat.zero();
  
  const std::vector<zcomponent>::const_iterator matA_data_end =matA.data.end();
  for(std::vector<zcomponent>::const_iterator it=matA.data.begin(); it!=matA_data_end; it++){
    for(CPPL_INT j=0; j<matB.n; j++){
      newmat(it->i,j) += it->v *matB(it->j,j);
    }
  }
  
  matB.destroy();
  return _(newmat);
}