#pragma once

#include "fs_fstat.hpp"

#define FS_FILE_CHANGED   0
#define FS_FILE_UNCHANGED 1

namespace fs
{
  static
  inline
  int
  file_changed(const int          fd_,
               const struct stat &orig_st_)
  {
    int rv;
    struct stat new_st;

    rv = fs::fstat(fd_,&new_st);
    if(rv < 0)
      return rv;

    if(orig_st_.st_ino != new_st.st_ino)
      return FS_FILE_CHANGED;
    if(orig_st_.st_dev != new_st.st_dev)
      return FS_FILE_CHANGED;
    if(orig_st_.st_size != new_st.st_size)
      return FS_FILE_CHANGED;
    if(orig_st_.st_mtim.tv_sec != new_st.st_mtim.tv_sec)
      return FS_FILE_CHANGED;
    if(orig_st_.st_mtim.tv_nsec != new_st.st_mtim.tv_nsec)
      return FS_FILE_CHANGED;

    return FS_FILE_UNCHANGED;
  }
}