// copy_file.cxx

#include "dataset_util/copy_file.h"
#include "dataset_util/FileStatus.h"
#include "dataset_util/ssystem.h"
#include <unistd.h>

using std::string;

int copy_file(string infile, string outfile, bool overwrite) {
  int sstat;
  if ( infile.size() == 0 ) return 1;
  if ( outfile.size() == 0 ) return 2;
  if ( ! FileStatus(infile).exists() ) return 3;
  if ( FileStatus(outfile).exists() ) {
    if ( ! overwrite ) return 4;
    if ( FileStatus(outfile).is_directory() ) return 5;
    if ( ! FileStatus(outfile).is_regular() ) return 6;
    int ustat = unlink(outfile.c_str());
    if ( ustat ) return 7;
  }
  sstat = ssystem("cp " + infile + " " + outfile);
  if ( sstat ) return 8;
  return 0;
}