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#pragma once

#include <util/generic/fwd.h>
#include <util/system/fhandle.h>

class TFile;
class TFsPath;

struct TFileStat {
    ui32 Mode = 0; /* protection */ 
    ui32 Uid = 0;  /* user ID of owner */ 
    ui32 Gid = 0;  /* group ID of owner */ 

    ui64 NLinks = 0;         /* number of hard links */
    ui64 Size = 0;           /* total size, in bytes */
    ui64 INode = 0;          /* inode number */
    ui64 AllocationSize = 0; /* number of bytes allocated on the disk */

    time_t ATime = 0; /* time of last access */ 
    time_t MTime = 0; /* time of last modification */ 
    time_t CTime = 0; /* time of last status change */ 

public:
    TFileStat();

    bool IsNull() const noexcept;
 
    bool IsFile() const noexcept;
    bool IsDir() const noexcept;
    bool IsSymlink() const noexcept;

    explicit TFileStat(const TFile& f);
    explicit TFileStat(FHANDLE f);
    TFileStat(const TFsPath& fileName, bool nofollow = false);
    TFileStat(const TString& fileName, bool nofollow = false);
    TFileStat(const char* fileName, bool nofollow = false);

    friend bool operator==(const TFileStat& l, const TFileStat& r) noexcept;
    friend bool operator!=(const TFileStat& l, const TFileStat& r) noexcept;
 
private:
    void MakeFromFileName(const char* fileName, bool nofollow);
};

i64 GetFileLength(FHANDLE fd);
i64 GetFileLength(const char* name); 
i64 GetFileLength(const TString& name);