tProj.hh - pism - [fork] customized build of PISM, the parallel ice sheet model (tillflux branch)
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       tProj.hh (1713B)
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            1 /* Copyright (C) 2016, 2017, 2019, 2020 PISM Authors
            2  *
            3  * This file is part of PISM.
            4  *
            5  * PISM is free software; you can redistribute it and/or modify it under the
            6  * terms of the GNU General Public License as published by the Free Software
            7  * Foundation; either version 3 of the License, or (at your option) any later
            8  * version.
            9  *
           10  * PISM is distributed in the hope that it will be useful, but WITHOUT ANY
           11  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
           12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
           13  * details.
           14  *
           15  * You should have received a copy of the GNU General Public License
           16  * along with PISM; if not, write to the Free Software
           17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
           18  */
           19 
           20 #ifndef PROJ_WRAPPER_H
           21 #define PROJ_WRAPPER_H
           22 
           23 #include <string>
           24 
           25 #include <proj.h>
           26 
           27 #include "pism/util/error_handling.hh"
           28 
           29 namespace pism {
           30 
           31 //! A wrapper for PJ that makes sure `pj_destroy` is called.
           32 class Proj {
           33 public:
           34   Proj(const std::string &input, const std::string &output) {
           35     m_pj = proj_create_crs_to_crs(PJ_DEFAULT_CTX, input.c_str(), output.c_str(), 0);
           36     if (m_pj == 0) {
           37       throw RuntimeError::formatted(PISM_ERROR_LOCATION,
           38                                     "Failed to initialize projection transformation '%s' to '%s' (errno: %d, %s).",
           39                                     input.c_str(), output.c_str(),
           40                                     proj_errno(0),
           41                                     proj_errno_string(proj_errno(0)));
           42     }
           43   }
           44 
           45   ~Proj() {
           46     proj_destroy(m_pj);
           47   }
           48   PJ* operator*() {
           49     return m_pj;
           50   }
           51 private:
           52   PJ *m_pj;
           53 };
           54 
           55 } // end of namespace pism
           56 
           57 
           58 #endif /* PROJ_WRAPPER_H */