86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
// clang-format off
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/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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https://www.lammps.org/, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------- */
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#include "reader.h"
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#include "error.h"
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using namespace LAMMPS_NS;
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// only proc 0 calls methods of this class, except for constructor/destructor
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/* ---------------------------------------------------------------------- */
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Reader::Reader(LAMMPS *lmp) : Pointers(lmp)
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{
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fp = nullptr;
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}
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/* ----------------------------------------------------------------------
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try to open given file
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generic version for ASCII files that may be compressed
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------------------------------------------------------------------------- */
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void Reader::open_file(const char *file)
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{
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if (fp != nullptr) close_file();
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if (utils::strmatch(file,"\\.gz$")) {
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compressed = 1;
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#ifdef LAMMPS_GZIP
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auto gunzip = fmt::format("gzip -c -d {}",file);
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#ifdef _WIN32
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fp = _popen(gunzip.c_str(),"rb");
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#else
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fp = popen(gunzip.c_str(),"r");
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#endif
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#else
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error->one(FLERR,"Cannot open gzipped file without gzip support");
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#endif
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} else {
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compressed = 0;
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fp = fopen(file,"r");
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}
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if (fp == nullptr)
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error->one(FLERR,"Cannot open file {}: {}",
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file, utils::getsyserror());
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}
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/* ----------------------------------------------------------------------
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close current file if open
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generic version for ASCII files that may be compressed
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------------------------------------------------------------------------- */
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void Reader::close_file()
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{
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if (fp == nullptr) return;
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if (compressed) pclose(fp);
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else fclose(fp);
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fp = nullptr;
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}
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/* ----------------------------------------------------------------------
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detect unused arguments
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------------------------------------------------------------------------- */
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void Reader::settings(int narg, char** /*args*/)
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{
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if (narg > 0)
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error->all(FLERR,"Illegal read_dump command");
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}
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