casadi_trans.hpp

//
//    MIT No Attribution
//
//    Copyright (C) 2010-2023 Joel Andersson, Joris Gillis, Moritz Diehl, KU Leuven.
//
//    Permission is hereby granted, free of charge, to any person obtaining a copy of this
//    software and associated documentation files (the "Software"), to deal in the Software
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// SYMBOL "trans"
template<typename T1>
void casadi_trans(const T1* x, const casadi_int* sp_x, T1* y,
    const casadi_int* sp_y, casadi_int* tmp) {
  casadi_int ncol_x, nnz_x, ncol_y, k;
  const casadi_int* row_x, *colind_y;
  ncol_x = sp_x[1];
  nnz_x = sp_x[2 + ncol_x];
  row_x = sp_x + 2 + ncol_x+1;
  ncol_y = sp_y[1];
  colind_y = sp_y+2;
  for (k=0; k<ncol_y; ++k) tmp[k] = colind_y[k];
  for (k=0; k<nnz_x; ++k) {
    y[tmp[row_x[k]]++] = x[k];
  }
}