nc_io.cc

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//   File description
 
#include "arts.h"
 
#ifdef ENABLE_NETCDF
 
#include "exceptions.h"
#include "file.h"
#include "messages.h"
#include "nc_io.h"
#include "nc_io_types.h"
 
//   Default file name
 
 
void nca_filename(String &filename, const String &varname) {
  if ("" == filename) {
    extern const String out_basename;
    filename = out_basename + "." + varname + ".nc";
  }
}
 
 
void nca_filename_with_index(String &filename, const Index &file_index,
                             const String &varname) {
  if ("" == filename) {
    extern const String out_basename;
    ostringstream os;
    os << out_basename << "." << varname << "." << file_index << ".nc";
    filename = os.str();
  } else {
    ostringstream os;
    os << filename << "." << file_index << ".nc";
    filename = os.str();
  }
}
 
 
template <typename T>
void nca_read_from_file(const String &filename, T &type,
                        const Verbosity &verbosity) {
  CREATE_OUT2;
 
  String efilename = expand_path(filename);
 
  out2 << "  Reading " << efilename << '\n';
 
  bool fail = false;
  String fail_msg;
#pragma omp critical(netcdf__critical_region)
  {
    int ncid;
    if (nc_open(efilename.c_str(), NC_NOWRITE, &ncid)) {
      fail = true;
      fail_msg = "Error opening file. Does it exists?";
    } else {
      try {
        nca_read_from_file(ncid, type, verbosity);
      } catch (const std::runtime_error &e) {
        fail = true;
        fail_msg = e.what();
      }
      nc_close(ncid);
    }
  }
 
  if (fail)
    ARTS_USER_ERROR("Error reading file: ", efilename, '\n', fail_msg);
}
 
 
template <typename T>
void nca_write_to_file(const String &filename, const T &type,
                       const Verbosity &verbosity) {
  CREATE_OUT2;
 
  String efilename = add_basedir(filename);
 
  out2 << "  Writing " << efilename << '\n';
 
  bool fail = false;
  String fail_msg;
#pragma omp critical(netcdf__critical_region)
  {
    int ncid;
    if (nc_create(efilename.c_str(), NC_CLOBBER | NC_NETCDF4, &ncid)) {
      fail = true;
      fail_msg = "Error opening file for writing.";
    } else {
      try {
        nca_write_to_file(ncid, type, verbosity);
      } catch (const std::runtime_error &e) {
        fail = true;
        fail_msg = e.what();
      }
      nc_close(ncid);
    }
  }
 
  if (fail)
    ARTS_USER_ERROR("Error writing file: ", efilename, '\n', fail_msg);
}
 
 
void nca_def_dim(const int ncid, const String &name, const Index nelem,
                 int *ncdim) {
  int retval;
  if ((retval = nc_def_dim(ncid, name.c_str(), nelem, ncdim)))
    nca_error(retval, "nc_def_dim");
}
 
 
void nca_def_var(const int ncid, const String &name, const nc_type type,
                 const int ndims, const int *dims, int *varid) {
  int retval;
  if ((retval = nc_def_var(ncid, name.c_str(), type, ndims, dims, varid)))
    nca_error(retval, "nc_def_var");
}
 
 
int nca_def_ArrayOfIndex(const int ncid, const String &name,
                         const ArrayOfIndex &a) {
  std::array<int, 1> ncdims;
  int varid;
  if (a.nelem()) {
    nca_def_dim(ncid, name + "_nelem", a.nelem(), &ncdims[0]);
    nca_def_var(ncid, name, NC_INT, 1, &ncdims[0], &varid);
  } else
    varid = -1;
 
  return varid;
}
 
 
int nca_def_Vector(const int ncid, const String &name, const Vector &v) {
  std::array<int, 1> ncdims;
  int varid;
  if (v.nelem()) {
    nca_def_dim(ncid, name + "_nelem", v.nelem(), &ncdims[0]);
    nca_def_var(ncid, name, NC_DOUBLE, 1, &ncdims[0], &varid);
  } else
    varid = -1;
 
  return varid;
}
 
 
int nca_def_Matrix(const int ncid, const String &name, const Matrix &m) {
  std::array<int, 2> ncdims;
  int varid;
  if (m.nrows() && m.ncols()) {
    nca_def_dim(ncid, name + "_nrows", m.nrows(), &ncdims[0]);
    nca_def_dim(ncid, name + "_ncols", m.ncols(), &ncdims[1]);
    nca_def_var(ncid, name, NC_DOUBLE, 2, &ncdims[0], &varid);
  } else
    varid = -1;
 
  return varid;
}
 
 
int nca_def_Tensor4(const int ncid, const String &name, const Tensor4 &t) {
  std::array<int, 4> ncdims;
  int varid;
  if (t.nbooks() && t.npages() && t.nrows() && t.ncols()) {
    nca_def_dim(ncid, name + "_nbooks", t.nbooks(), &ncdims[0]);
    nca_def_dim(ncid, name + "_npages", t.npages(), &ncdims[1]);
    nca_def_dim(ncid, name + "_nrows", t.nrows(), &ncdims[2]);
    nca_def_dim(ncid, name + "_ncols", t.ncols(), &ncdims[3]);
    nca_def_var(ncid, name, NC_DOUBLE, 4, &ncdims[0], &varid);
  } else
    varid = -1;
 
  return varid;
}
 
 
Index nca_get_dim(const int ncid, const String &name, const bool noerror) {
  int retval, dimid;
  size_t ndim;
  if ((retval = nc_inq_dimid(ncid, name.c_str(), &dimid))) {
    if (!noerror)
      nca_error(retval, "nc_inq_ndims(" + name + ")");
    else
      return 0;
  }
  if ((retval = nc_inq_dimlen(ncid, dimid, &ndim))) {
    if (!noerror)
      nca_error(retval, "nc_inq_dimlen(" + name + ")");
    else
      return 0;
  }
 
  return (Index)ndim;
}
 
 
void nca_get_data(const int ncid, const String &name, int *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_var_int(ncid, varid, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, long *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_var_long(ncid, varid, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, long long *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_var_longlong(ncid, varid, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, Numeric *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_var_double(ncid, varid, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, size_t start,
                  size_t count, Numeric *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_vara_double(ncid, varid, &start, &count, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, char *data) {
  int retval, varid;
  if ((retval = nc_inq_varid(ncid, name.c_str(), &varid)))
    nca_error(retval, "nc_inq_varid(" + name + ")");
  if ((retval = nc_get_var_text(ncid, varid, data)))
    nca_error(retval, "nc_get_var(" + name + ")");
}
 
 
void nca_get_data(const int ncid, const String &name, ArrayOfIndex &aoi,
                  const bool noerror) {
  Index nelem = nca_get_dim(ncid, name + "_nelem", noerror);
  aoi.resize(nelem);
  if (nelem) {
    nca_get_data(ncid, name, aoi.data());
  }
}
 
 
void nca_get_data(const int ncid, const String &name,
                  ArrayOfArrayOfSpeciesTag &aast, const bool noerror) {
  ArrayOfIndex species_count;
  nca_get_data(ncid, name + "_count", species_count, noerror);
  aast.resize(species_count.nelem());
  if (species_count.nelem()) {
    Index species_strings_nelem =
        nca_get_dim(ncid, name + "_strings_nelem", noerror);
    Index species_strings_length =
        nca_get_dim(ncid, name + "_strings_length", noerror);
    char *species_strings =
        new char[species_strings_nelem * species_strings_length];  // FIXME: THIS SHOULD NOT USE "new"
    if (species_count.nelem())
      nca_get_data(ncid, name + "_strings", species_strings);
 
    Index si = 0;
    for (Index i = 0; i < species_count.nelem(); i++) {
      aast[i].resize(0);
      for (Index j = 0; j < species_count[i]; j++) {
        aast[i].push_back(SpeciesTag(&species_strings[si]));
        si += species_strings_length;
      }
    }
 
    delete[] species_strings;
  }
}
 
 
void nca_get_data(const int ncid, const String &name, Vector &v,
                  const bool noerror) {
  Index nelem = nca_get_dim(ncid, name + "_nelem", noerror);
  v.resize(nelem);
  if (nelem)
    nca_get_data(ncid, name, v.unsafe_data_handle());
}
 
 
void nca_get_data(const int ncid, const String &name, Matrix &m,
                  const bool noerror) {
  Index nrows = nca_get_dim(ncid, name + "_nrows", noerror);
  Index ncols = nca_get_dim(ncid, name + "_ncols", noerror);
  m.resize(nrows, ncols);
  if (nrows && ncols)
    nca_get_data(ncid, name, m.unsafe_data_handle());
}
 
 
void nca_get_data(const int ncid, const String &name, Tensor4 &t,
                  const bool noerror) {
  Index nbooks = nca_get_dim(ncid, name + "_nbooks", noerror);
  Index npages = nca_get_dim(ncid, name + "_npages", noerror);
  Index nrows = nca_get_dim(ncid, name + "_nrows", noerror);
  Index ncols = nca_get_dim(ncid, name + "_ncols", noerror);
  t.resize(nbooks, npages, nrows, ncols);
  if (nbooks && npages && nrows && ncols)
    nca_get_data(ncid, name, t.unsafe_data_handle());
}
 
 
void nca_put_var(const int ncid, const int varid, const long *ind_arr) {
  int retval;
  if ((retval = nc_put_var_long(ncid, varid, ind_arr)))
    nca_error(retval, "nc_put_var");
}
 
 
void nca_put_var(const int ncid, const int varid, const long long *ind_arr) {
  int retval;
  if ((retval = nc_put_var_longlong(ncid, varid, ind_arr)))
    nca_error(retval, "nc_put_var");
}
 
 
bool nca_put_var(const int ncid, const int varid, const ArrayOfIndex &a) {
  bool fail = true;
  if (a.nelem()) {
    nca_put_var(ncid, varid, a.data());
    fail = false;
  }
  return fail;
}
 
 
bool nca_put_var(const int ncid, const int varid, const Vector &v) {
  bool fail = true;
  if (v.nelem()) {
    int retval;
    if ((retval = nc_put_var_double(ncid, varid, v.unsafe_data_handle())))
      nca_error(retval, "nc_put_var");
    fail = false;
  }
  return fail;
}
 
 
bool nca_put_var(const int ncid, const int varid, const Matrix &m) {
  bool fail = true;
  if (m.nrows() && m.ncols()) {
    int retval;
    if ((retval = nc_put_var_double(ncid, varid, m.unsafe_data_handle())))
      nca_error(retval, "nc_put_var");
    fail = false;
  }
  return fail;
}
 
 
bool nca_put_var(const int ncid, const int varid, const Tensor4 &t) {
  bool fail = true;
  if (t.nbooks() && t.npages() && t.nrows() && t.ncols()) {
    int retval;
    if ((retval = nc_put_var_double(ncid, varid, t.unsafe_data_handle())))
      nca_error(retval, "nc_put_var");
    fail = false;
  }
  return fail;
}
 
 
void nca_error(const int e, const std::string_view s) {
  ARTS_USER_ERROR("NetCDF error: ", s, ", ", e, "\nCheck your input file.");
}
 
// We can't do the instantiation at the beginning of this file, because the
// implementation of nca_write_to_file and nca_read_from_file have to be known.
 
#include "nc_io_instantiation.h"
 
#endif /* ENABLE_NETCDF */