casadi_to_mex.hpp

//
//    MIT No Attribution
//
//    Copyright (C) 2010-2023 Joel Andersson, Joris Gillis, Moritz Diehl, KU Leuven.
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// SYMBOL "to_mex"
template<typename T1>
mxArray* casadi_to_mex(const casadi_int* sp, const T1* x) {
  casadi_int nrow, ncol, c, k;
#ifndef CASADI_MEX_NO_SPARSE
  casadi_int nnz;
#endif
  const casadi_int *colind, *row;
  mxArray *p;
  double *d;
#ifndef CASADI_MEX_NO_SPARSE
  casadi_int i;
  mwIndex *j;
#endif /* CASADI_MEX_NO_SPARSE */
  nrow = *sp++;
  ncol = *sp++;
  colind = sp;
  row = sp+ncol+1;
#ifndef CASADI_MEX_NO_SPARSE
  nnz = sp[ncol];
  if (nnz!=nrow*ncol) {
    p = mxCreateSparse(nrow, ncol, nnz, mxREAL);
    for (i=0, j=mxGetJc(p); i<=ncol; ++i) *j++ = *colind++;
    for (i=0, j=mxGetIr(p); i<nnz; ++i) *j++ = *row++;
    if (x) {
      d = (double*)mxGetData(p);
      for (i=0; i<nnz; ++i) *d++ = casadi_to_double(*x++);
    }
    return p;
  }
#endif /* CASADI_MEX_NO_SPARSE */
  p = mxCreateDoubleMatrix(nrow, ncol, mxREAL);
  if (x) {
    d = (double*)mxGetData(p);
    for (c=0; c<ncol; ++c) {
      for (k=colind[c]; k<colind[c+1]; ++k) {
        d[row[k]+c*nrow] = casadi_to_double(*x++);
      }
    }
  }
  return p;
}