forked from lijiext/lammps
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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http://lammps.sandia.gov, 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 "stdio.h"
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#include "string.h"
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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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/* ---------------------------------------------------------------------- */
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Reader::Reader(LAMMPS *lmp) : Pointers(lmp)
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{
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fp = NULL;
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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 != NULL) close_file();
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compressed = 0;
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const char *suffix = file + strlen(file) - 3;
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if (suffix > file && strcmp(suffix,".gz") == 0) compressed = 1;
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if (!compressed) fp = fopen(file,"r");
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else {
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#ifdef LAMMPS_GZIP
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char gunzip[1024];
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sprintf(gunzip,"gzip -c -d %s",file);
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#ifdef _WIN32
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fp = _popen(gunzip,"rb");
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#else
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fp = popen(gunzip,"r");
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#endif
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#else
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error->one(FLERR,"Cannot open gzipped file");
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#endif
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}
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if (fp == NULL) {
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char str[128];
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sprintf(str,"Cannot open file %s",file);
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error->one(FLERR,str);
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}
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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 == NULL) return;
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if (compressed) pclose(fp);
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else fclose(fp);
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fp = NULL;
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}
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