{
    This file is part of the Free Pascal run time library.
    Copyright (c) 2012 by the Free Pascal development team

    File utility calls

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}



{$ifndef SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}
Function FileOpen (Const FileName : unicodestring; Mode : Integer) : THandle;
begin
  Result:=FileOpen(ToSingleByteFileSystemEncodedFileName(FileName),Mode);
end;


Function FileCreate (Const FileName : UnicodeString) : THandle;
begin
  Result:=FileCreate(ToSingleByteFileSystemEncodedFileName(FileName));
end;


Function FileCreate (Const FileName : UnicodeString; Rights : Integer) : THandle;
begin
  Result:=FileCreate(ToSingleByteFileSystemEncodedFileName(FileName),Rights);
end;


Function FileCreate (Const FileName : UnicodeString; ShareMode : Integer; Rights : Integer) : THandle;
begin
  Result:=FileCreate(ToSingleByteFileSystemEncodedFileName(FileName),ShareMode,Rights);
end;


Function FileAge (Const FileName : UnicodeString): Longint;
begin
  Result:=FileAge(ToSingleByteFileSystemEncodedFileName(FileName));
end;


Function FileExists (Const FileName : UnicodeString) : Boolean;
begin
  Result:=FileExists(ToSingleByteFileSystemEncodedFileName(FileName));
end;


Function DirectoryExists (Const Directory : UnicodeString) : Boolean;
begin
  Result:=DirectoryExists(ToSingleByteFileSystemEncodedFileName(Directory));
end;


Function FileGetAttr (Const FileName : UnicodeString) : Longint;
begin
  Result:=FileGetAttr(ToSingleByteFileSystemEncodedFileName(FileName));
end;


Function FileSetAttr (Const Filename : UnicodeString; Attr: longint) : Longint;
begin
  Result:=FileSetAttr(ToSingleByteFileSystemEncodedFileName(FileName),Attr);
end;


Function DeleteFile (Const FileName : UnicodeString) : Boolean;
begin
  Result:=DeleteFile(ToSingleByteFileSystemEncodedFileName(FileName));
end;


Function RenameFile (Const OldName, NewName : UnicodeString) : Boolean;

begin
  Result:=RenameFile(ToSingleByteFileSystemEncodedFileName(OldName),
                     ToSingleByteFileSystemEncodedFileName(NewName));
end;

{$ifdef OS_FILEISREADONLY}
Function FileIsReadOnly(const FileName: UnicodeString): Boolean;
begin
  Result:=FileIsReadOnly(ToSingleByteFileSystemEncodedFileName(FileName));
end;
{$endif}


{$ifdef OS_FILESETDATEBYNAME}
Function FileSetDate (Const FileName : UnicodeString;Age : Longint) : Longint;
begin
  Result:=FileSetDate(ToSingleByteFileSystemEncodedFileName(FileName),Age);
end;
{$endif}


function FileAge(const FileName: RawByteString; out FileDateTime: TDateTime; FollowLink: Boolean = True): Boolean;
Var
  Info : TRawByteSearchRec;
  A : Integer;
begin
  for A:=1 to Length(FileName) do
    if CharInSet(FileName[A],['?','*']) then
      Exit(False);
  A:=0;
  if not FollowLink then
    A:=A or faSymLink;
  Result:=FindFirst(FileName,A,Info)=0;
  if Result then
    begin
      FileDateTime:=FileDatetoDateTime(Info.Time);
      FindClose(Info);
    end;
end;


Function FileAge(const FileName: UnicodeString; out FileDateTime: TDateTime; FollowLink: Boolean = True): Boolean;
begin
  Result:=FileAge(ToSingleByteFileSystemEncodedFileName(FileName),FileDateTime,FollowLink);
end;


Function FileSearch (Const Name, DirList : UnicodeString; Options : TFileSearchoptions = [sfoImplicitCurrentDir]) : UnicodeString;
begin
  Result:=UnicodeString(FileSearch(ToSingleByteFileSystemEncodedFileName(Name),
                                   ToSingleByteFileSystemEncodedFileName(Dirlist),Options));
end;


Function FileSearch (Const Name, DirList : UnicodeString; ImplicitCurrentDir : Boolean) : UnicodeString;
begin
  Result:=UnicodeString(FileSearch(ToSingleByteFileSystemEncodedFileName(Name),
                                   ToSingleByteFileSystemEncodedFileName(DirList),ImplicitCurrentDir));
end;


Function ExeSearch (Const Name : UnicodeString; Const DirList : UnicodeString ='' ) : UnicodeString;
begin
  Result:=UnicodeString(ExeSearch(ToSingleByteFileSystemEncodedFileName(Name),
                                  ToSingleByteFileSystemEncodedFileName(Dirlist)));
end;



Function FileSearch (Const Name, DirList : RawByteString; Options : TFileSearchoptions = [sfoImplicitCurrentDir]) : RawByteString;
Var
  I : longint;
  Temp : RawByteString;
begin
  Result:=Name;
  temp:=SetDirSeparators(DirList);
  // Start with checking the file in the current directory
  If (sfoImplicitCurrentDir in Options) and (Result <> '') and FileExists(Result) Then
    exit;
  while True do begin
    If Temp = '' then
      Break; // No more directories to search - fail
    I:=pos(PathSeparator,Temp);
    If I<>0 then
      begin
        Result:=Copy (Temp,1,i-1);
        system.Delete(Temp,1,I);
      end
    else
      begin
        Result:=Temp;
        Temp:='';
      end;
    If Result<>'' then
      begin
      If (sfoStripQuotes in Options) and (Result[1]='"') and (Result[Length(Result)]='"') then
        Result:=Copy(Result,2,Length(Result)-2);
      if (Result<>'') then
        Result:=IncludeTrailingPathDelimiter(Result)+name;
      end;
    If (Result <> '') and FileExists(Result) Then
      exit;
  end;
  Result:='';
end;


Function FileSearch (Const Name, DirList : RawByteString; ImplicitCurrentDir : Boolean) : RawByteString;
begin
  if ImplicitCurrentDir then
    Result:=FileSearch(Name,DirList,[sfoImplicitCurrentDir])
  else
    Result:=FileSearch(Name,DirList,[]);
end;


Function ExeSearch (Const Name : RawByteString; Const DirList : RawByteString ='' ) : RawByteString;
Var
  D : RawByteString;
  O : TFileSearchOptions;
begin
  D:=DirList;
  if (D='') then
    D:=GetEnvironmentVariable('PATH');
{$ifdef unix}
  O:=[];
{$else unix}
  O:=[sfoImplicitCurrentDir,sfoStripQuotes];
{$endif unix}
  Result := FileSearch(Name, D, O);
end;

{$endif}

{$ifndef SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}
Function FileOpen (Const FileName : rawbytestring; Mode : Integer) : THandle;
begin
  Result:=FileOpen(UnicodeString(FileName),Mode);
end;


Function FileCreate (Const FileName : RawByteString) : THandle;
begin
  Result:=FileCreate(UnicodeString(FileName));
end;


Function FileCreate (Const FileName : RawByteString; Rights : Integer) : THandle;
begin
  Result:=FileCreate(UnicodeString(FileName),Rights);
end;


Function FileCreate (Const FileName : RawByteString; ShareMode : Integer; Rights : Integer) : THandle;
begin
  Result:=FileCreate(UnicodeString(FileName),ShareMode,Rights);
end;


Function FileAge (Const FileName : RawByteString): Longint;
begin
  Result:=FileAge(UnicodeString(FileName));
end;


Function FileExists (Const FileName : RawByteString) : Boolean;
begin
  Result:=FileExists(UnicodeString(FileName));
end;


Function DirectoryExists (Const Directory : RawByteString) : Boolean;
begin
  Result:=DirectoryExists(UnicodeString(Directory));
end;


Function FileGetAttr (Const FileName : RawByteString) : Longint;
begin
  Result:=FileGetAttr(unicodestring(FileName));
end;


Function FileSetAttr (Const Filename : RawByteString; Attr: longint) : Longint;
begin
  Result:=FileSetAttr(unicodestring(FileName),Attr);
end;


Function DeleteFile (Const FileName : RawByteString) : Boolean;
begin
  Result:=DeleteFile(UnicodeString(FileName));
end;


Function RenameFile (Const OldName, NewName : RawByteString) : Boolean;
begin
  Result:=RenameFile(UnicodeString(OldName),UnicodeString(NewName));
end;

{$ifdef OS_FILEISREADONLY}
Function FileIsReadOnly(const FileName: RawByteString): Boolean;
begin
  Result:=FileIsReadOnly(UnicodeString(FileName));
end;
{$endif}

{$ifdef OS_FILESETDATEBYNAME}
Function FileSetDate (Const FileName : RawByteString;Age : Longint) : Longint;
begin
  Result:=FileSetDate(UnicodeString(FileName),Age);
end;
{$endif}


function FileAge(const FileName: UnicodeString; out FileDateTime: TDateTime; FollowLink: Boolean = True): Boolean;
Var
  Info : TUnicodeSearchRec;
  A : Integer;

begin
  for A:=1 to Length(FileName) do
    if CharInSet(FileName[A],['?','*']) then
      Exit(False);
  A:=0;
  if not FollowLink then
    A:=A or faSymLink;
  Result:=FindFirst(FileName,A,Info)=0;
  if Result then
    begin
      FileDateTime:=FileDatetoDateTime(Info.Time);
      FindClose(Info);
    end;
end;


Function FileAge(const FileName: RawbyteString; out FileDateTime: TDateTime; FollowLink: Boolean = True): Boolean;
begin
  Result:=FileAge(UnicodeString(FileName),FileDateTime,FollowLink);
end;


Function FileSearch (Const Name, DirList : UnicodeString; Options : TFileSearchoptions = [sfoImplicitCurrentDir]) : UnicodeString;
Var
  I : longint;
  Temp : UnicodeString;
begin
  Result:=Name;
  temp:=SetDirSeparators(DirList);
  // Start with checking the file in the current directory
  If (sfoImplicitCurrentDir in Options) and (Result <> '') and FileExists(Result) Then
    exit;
  while True do begin
    If Temp = '' then
      Break; // No more directories to search - fail
    I:=pos(PathSeparator,Temp);
    If I<>0 then
      begin
        Result:=Copy (Temp,1,i-1);
        system.Delete(Temp,1,I);
      end
    else
      begin
        Result:=Temp;
        Temp:='';
      end;
    If Result<>'' then
      begin
      If (sfoStripQuotes in Options) and (Result[1]='"') and (Result[Length(Result)]='"') then
        Result:=Copy(Result,2,Length(Result)-2);
      if (Result<>'') then
        Result:=IncludeTrailingPathDelimiter(Result)+name;
      end;
    If (Result <> '') and FileExists(Result) Then
      exit;
  end;
  Result:='';
end;


Function FileSearch (Const Name, DirList : RawbyteString; Options : TFileSearchoptions = [sfoImplicitCurrentDir]) : RawByteString;
begin
  Result:=ToSingleByteFileSystemEncodedFileName(FileSearch(unicodestring(name),unicodestring(dirlist),options));
end;


Function FileSearch (Const Name, DirList : RawbyteString; ImplicitCurrentDir : Boolean) : RawByteString;
begin
  Result:=ToSingleByteFileSystemEncodedFileName(FileSearch(unicodestring(name),unicodestring(dirlist),ImplicitCurrentDir));
end;


Function FileSearch (Const Name, DirList : UnicodeString; ImplicitCurrentDir : Boolean) : UnicodeString;
begin
  if ImplicitCurrentDir then
    Result:=FileSearch(Name,DirList,[sfoImplicitCurrentDir])
  else
    Result:=FileSearch(Name,DirList,[]);
end;


Function ExeSearch (Const Name : UnicodeString; Const DirList : UnicodeString ='' ) : UnicodeString;
Var
  D : UnicodeString;
  O : TFileSearchOptions;
begin
  D:=DirList;
  if (D='') then
    D:=UnicodeString(GetEnvironmentVariable('PATH'));
{$ifdef unix}
  O:=[];
{$else unix}
  O:=[sfoImplicitCurrentDir,sfoStripQuotes];
{$endif unix}
  Result := FileSearch(Name, D, O);
end;


Function ExeSearch (Const Name : RawbyteString; Const DirList : RawbyteString ='' ) : RawByteString;
begin
  Result:=ToSingleByteFileSystemEncodedFileName(ExeSearch(unicodestring(name),unicodestring(dirlist)));
end;
{$endif}


Function GetFileHandle(var f : File):THandle;
begin
  Result:=filerec(f).handle;
end;


Function GetFileHandle(var f : Text):THandle;
begin
  Result:=textrec(f).handle;
end;


{ FindFirst/FindNext. In order to avoid having to duplicate most code in th
  OS-specific implementations, we let those implementations fill in all
  fields of TRawbyte/UnicodeSearchRec, except for the name. That field is
  filled in by the OS-indepedent wrappers, which also takes care of setting
  the appropriate code page if applicable.
}

type
  TAbstractSearchRec = Record
    Time : Longint;
    Size : Int64;
    Attr : Longint;
    { this will be assigned by the generic code; it is actually either a
      rawbytestring or unicodestring; keep it a reference-counted type
      so that -gt doesn't overwrite it, the field name should be
      indication enough that you should not touch it }
    Name_do_not_touch : RawByteString;
    ExcludeAttr : Longint;
    FindHandle : {$ifdef FINDHANDLE_IS_POINTER}Pointer{$else}THandle{$endif};
  {$ifdef unix}
    Mode : TMode;
  {$endif unix}
  {$ifdef USEFINDDATA}
    FindData : TFindData;
  {$endif}
  end;


{$ifdef SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}
Function InternalFindFirst (Const Path : RawByteString; Attr : Longint; out Rslt : TAbstractSearchRec; var Name: RawByteString) : Longint; forward;
Function InternalFindNext (var Rslt : TAbstractSearchRec; var Name : RawByteString) : Longint; forward;
{$endif SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}

{$ifdef SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}
Function InternalFindFirst (Const Path : UnicodeString; Attr : Longint; out Rslt : TAbstractSearchRec; var Name: UnicodeString) : Longint; forward;
Function InternalFindNext (var Rslt : TAbstractSearchRec; var Name : UnicodeString) : Longint; forward;
{$endif SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}

procedure InternalFindClose(var Handle: {$ifdef FINDHANDLE_IS_POINTER}Pointer{$else}THandle{$endif}{$ifdef USEFINDDATA};var FindData: TFindData{$endif}); forward;


{$ifndef SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}
Function FindFirst (Const Path : RawByteString; Attr : Longint; out Rslt : TRawByteSearchRec) : Longint;
var
  Name: UnicodeString;
begin
  Result:=InternalFindFirst(UnicodeString(Path),Attr,TAbstractSearchRec(Rslt),Name);
  if Result=0 then
    widestringmanager.Unicode2AnsiMoveProc(PUnicodeChar(Name),Rslt.Name,DefaultRTLFileSystemCodePage,length(Name));
end;


Function FindNext (Var Rslt : TRawByteSearchRec) : Longint;
var
  Name: UnicodeString;
begin
  Result:=InternalFindNext(TAbstractSearchRec(Rslt),Name);
  if Result=0 then
    widestringmanager.Unicode2AnsiMoveProc(PUnicodeChar(Name),Rslt.Name,DefaultRTLFileSystemCodePage,length(Name));
end;

{$else not SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}

Function FindFirst (Const Path : RawByteString; Attr : Longint; out Rslt : TRawByteSearchRec) : Longint;
begin
  Result:=InternalFindFirst(Path,Attr,TAbstractSearchRec(Rslt),Rslt.Name);
  if Result=0 then
    SetCodePage(Rslt.Name,DefaultRTLFileSystemCodePage);
end;


Function FindNext (Var Rslt : TRawByteSearchRec) : Longint;
begin
  Result:=InternalFindNext(TAbstractSearchRec(Rslt),Rslt.Name);
  if Result=0 then
    SetCodePage(Rslt.Name,DefaultRTLFileSystemCodePage);
end;

{$endif not SYSUTILS_HAS_ANSISTR_FILEUTIL_IMPL}


{$ifndef SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}
Function FindFirst (Const Path : UnicodeString; Attr : Longint; out Rslt : TUnicodeSearchRec) : Longint;
var
  Name: RawByteString;
begin
  Result:=InternalFindFirst(ToSingleByteFileSystemEncodedFileName(Path),Attr,TAbstractSearchRec(Rslt),Name);
  if Result=0 then
    Rslt.Name:=UnicodeString(Name);
end;


Function FindNext (Var Rslt : TUnicodeSearchRec) : Longint;
var
  Name: RawByteString;
begin
  Result:=InternalFindNext(TAbstractSearchRec(Rslt),Name);
  if Result=0 then
    Rslt.Name:=UnicodeString(Name);
end;

{$else not SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}

Function FindFirst (Const Path : UnicodeString; Attr : Longint; out Rslt : TUnicodeSearchRec) : Longint;
begin
  Result:=InternalFindFirst(Path,Attr,TAbstractSearchRec(Rslt),Rslt.Name);
end;


Function FindNext (Var Rslt : TUnicodeSearchRec) : Longint;
begin
  Result:=InternalFindNext(TAbstractSearchRec(Rslt),Rslt.Name);
end;

{$endif not SYSUTILS_HAS_UNICODESTR_FILEUTIL_IMPL}

Procedure FindClose(Var f: TRawByteSearchRec);
begin
  InternalFindClose(f.FindHandle{$ifdef USEFINDDATA},f.FindData{$endif});
end;


Procedure FindClose(Var f: TUnicodeSearchRec);
begin
  InternalFindClose(f.FindHandle{$ifdef USEFINDDATA},f.FindData{$endif});
end;

{ TUnicodeSearchRec }

function TUnicodeSearchRec.GetTimeStamp: TDateTime;
begin
  Result := FileDateToDateTime(Time);
end;

{ TRawbyteSearchRec }

function TRawbyteSearchRec.GetTimeStamp: TDateTime;
begin
  Result := FileDateToDateTime(Time);
end;


{$ifndef SYSUTILS_HAS_FILEFLUSH_IMPL}
function FileFlush(Handle: THandle): Boolean;
begin
  Result:= False;
end;
{$endif}