X-Git-Url: https://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fshared%2Futils.pas;h=20706c661dae397f8a0b4914ab00e9caa765a252;hb=6fc3ad181843ea8ee8c1be9060fda475b8d906b4;hp=f61035e5c4ac6a6fbf736df86b64e53901c4550e;hpb=a4f25c41dfd783a925aa2dab4b9b84753d5c3f18;p=d2df-sdl.git

diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index f61035e..20706c6 100644
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
@@ -1,9 +1,8 @@
-(* Copyright (C)  DooM 2D:Forever Developers
+(* Copyright (C)  Doom 2D: Forever Developers
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
+ * the Free Software Foundation, version 3 of the License ONLY.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -19,7 +18,12 @@ unit utils;
 interface
 
 uses
-  SysUtils, Classes;
+  SysUtils, Classes, md5;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+type
+  SSArray = array of ShortString;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
@@ -75,16 +79,21 @@ function isWadPath (const fn: AnsiString): Boolean;
 // adds ".wad" extension if filename doesn't have one of ".wad", ".pk3", ".zip"
 function addWadExtension (const fn: AnsiString): AnsiString;
 
+// check wad signature
+function isWadData (data: Pointer; len: LongWord): Boolean;
+
 // convert number to strig with nice commas
-function Int64ToStrComma (i: Int64): AnsiString;
+function int64ToStrComma (i: Int64): AnsiString;
 
-function UpCase1251 (ch: Char): Char;
-function LoCase1251 (ch: Char): Char;
+function upcase1251 (ch: AnsiChar): AnsiChar; inline;
+function locase1251 (ch: AnsiChar): AnsiChar; inline;
+function IsValid1251 (ch: Word): Boolean;
+function IsPrintable1251 (ch: AnsiChar): Boolean;
 
 function toLowerCase1251 (const s: AnsiString): AnsiString;
 
 // `true` if strings are equal; ignoring case for cp1251
-function StrEquCI1251 (const s0, s1: AnsiString): Boolean;
+function strEquCI1251 (const s0, s1: AnsiString): Boolean;
 
 function utf8Valid (const s: AnsiString): Boolean;
 
@@ -95,11 +104,27 @@ function utf8to1251 (s: AnsiString): AnsiString;
 // nobody cares about shitdoze, so i'll use the same code path for it
 function findFileCI (var pathname: AnsiString; lastIsDir: Boolean=false): Boolean;
 
+// return fixed AnsiString or empty AnsiString
+function findDiskWad (fname: AnsiString): AnsiString;
+// slashes must be normalized!
+function isWadNamesEqu (wna, wnb: AnsiString): Boolean;
+
 // they throws
 function openDiskFileRO (pathname: AnsiString): TStream;
 function createDiskFile (pathname: AnsiString): TStream;
+// creates file if necessary
+function openDiskFileRW (pathname: AnsiString): TStream;
 
 // little endian
+procedure writeSign (st: TStream; const sign: AnsiString);
+function checkSign (st: TStream; const sign: AnsiString): Boolean;
+
+procedure writeBool (st: TStream; b: Boolean);
+function readBool (st: TStream): Boolean;
+
+procedure writeStr (st: TStream; const str: AnsiString; maxlen: LongWord=65535);
+function readStr (st: TStream; maxlen: LongWord=65535): AnsiString;
+
 procedure writeInt (st: TStream; v: Byte); overload;
 procedure writeInt (st: TStream; v: ShortInt); overload;
 procedure writeInt (st: TStream; v: Word); overload;
@@ -148,7 +173,9 @@ function nmin (a, b: Int64): Int64; inline; overload;
 function nmin (a, b: UInt64): UInt64; inline; overload;
 function nmin (a, b: Single): Single; inline; overload;
 function nmin (a, b: Double): Double; inline; overload;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nmin (a, b: Extended): Extended; inline; overload;
+{$ENDIF}
 
 function nmax (a, b: Byte): Byte; inline; overload;
 function nmax (a, b: ShortInt): ShortInt; inline; overload;
@@ -160,8 +187,9 @@ function nmax (a, b: Int64): Int64; inline; overload;
 function nmax (a, b: UInt64): UInt64; inline; overload;
 function nmax (a, b: Single): Single; inline; overload;
 function nmax (a, b: Double): Double; inline; overload;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nmax (a, b: Extended): Extended; inline; overload;
-
+{$ENDIF}
 function nclamp (v, a, b: Byte): Byte; inline; overload;
 function nclamp (v, a, b: ShortInt): ShortInt; inline; overload;
 function nclamp (v, a, b: Word): Word; inline; overload;
@@ -172,14 +200,15 @@ function nclamp (v, a, b: Int64): Int64; inline; overload;
 function nclamp (v, a, b: UInt64): UInt64; inline; overload;
 function nclamp (v, a, b: Single): Single; inline; overload;
 function nclamp (v, a, b: Double): Double; inline; overload;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nclamp (v, a, b: Extended): Extended; inline; overload;
-
+{$ENDIF}
 
 type
   TFormatStrFCallback = procedure (constref buf; len: SizeUInt);
 
 // returns formatted string if `writerCB` is `nil`, empty string otherwise
-function formatstrf (const fmt: AnsiString; args: array of const; writerCB: TFormatStrFCallback=nil): AnsiString;
+function formatstrf (const fmt: AnsiString; const args: array of const; writerCB: TFormatStrFCallback=nil): AnsiString;
 
 function wchar2win (wc: WideChar): AnsiChar; inline;
 function utf2win (const s: AnsiString): AnsiString;
@@ -235,6 +264,8 @@ type
     procedure clear (); inline;
 
     procedure append (constref it: ItemT); inline;
+    procedure delete (idx: Integer); inline;
+    function remove (idx: Integer): ItemT; inline;
 
   public
     property count: Integer read mCount;
@@ -243,8 +274,58 @@ type
   end;
 
 
+procedure FillMemory (Dest: Pointer; Len: LongWord; Ch: Byte); inline;
+procedure CopyMemory (Dest: Pointer; Src: Pointer; Len: LongWord); inline;
+procedure ZeroMemory (Dest: Pointer; Len: LongWord); inline;
+
+
+type
+  TDiskFileInfo = record
+    diskName: AnsiString;
+    size: LongInt;
+    age: LongInt;
+    // not changed by info getter; used in other parts of the code
+    userName: AnsiString;
+    tag: Integer;
+    hash: TMD5Digest;
+    udata: Pointer;
+  end;
+
+function GetDiskFileInfo (fname: AnsiString; var info: TDiskFileInfo): Boolean;
+
+
 implementation
 
+uses
+  xstreams;
+
+const wadExtensions: array [0..6] of AnsiString = (
+  '.dfz',
+  '.wad',
+  '.dfwad',
+  '.pk3',
+  '.pak',
+  '.zip',
+  '.dfzip'
+);
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+procedure CopyMemory (Dest: Pointer; Src: Pointer; Len: LongWord); inline;
+begin
+  Move(Src^, Dest^, Len);
+end;
+
+procedure FillMemory (Dest: Pointer; Len: LongWord; Ch: Byte); inline;
+begin
+  FillChar(Dest^, Len, Ch);
+end;
+
+procedure ZeroMemory (Dest: Pointer; Len: LongWord); inline;
+begin
+  FillChar(Dest^, Len, 0);
+end;
+
 
 // ////////////////////////////////////////////////////////////////////////// //
 constructor TSimpleList.TEnumerator.Create (const aitems: TItemArr; acount: Integer);
@@ -328,16 +409,46 @@ end;
 
 
 procedure TSimpleList.append (constref it: ItemT); inline;
+var
+  newsz: Integer;
 begin
-  if (mCount = Length(mItems)) then
+  if (mCount >= Length(mItems)) then
   begin
-    if (mCount = 0) then SetLength(mItems, 128) else SetLength(mItems, mCount*2);
+    newsz := mCount+(mCount div 3)+128;
+    SetLength(mItems, newsz);
   end;
   mItems[mCount] := it;
   Inc(mCount);
 end;
 
 
+procedure TSimpleList.delete (idx: Integer); inline;
+var
+  f: Integer;
+begin
+  if (idx >= 0) and (idx < mCount) then
+  begin
+    for f := idx+1 to mCount-1 do mItems[f-1] := mItems[f];
+  end;
+end;
+
+
+function TSimpleList.remove (idx: Integer): ItemT; inline;
+var
+  f: Integer;
+begin
+  if (idx >= 0) and (idx < mCount) then
+  begin
+    result := mItems[idx];
+    for f := idx+1 to mCount-1 do mItems[f-1] := mItems[f];
+  end
+  else
+  begin
+    result := Default(ItemT);
+  end;
+end;
+
+
 // ////////////////////////////////////////////////////////////////////////// //
 var
   wc2shitmap: array[0..65535] of AnsiChar;
@@ -466,25 +577,25 @@ var
     if (code < 0) or (code > $10FFFF) then begin result := '?'; exit; end;
     if (code <= $7f) then
     begin
-      result := Char(code and $ff);
+      result := AnsiChar(code and $ff);
     end
     else if (code <= $7FF) then
     begin
-      result := Char($C0 or (code shr 6));
-      result += Char($80 or (code and $3F));
+      result := AnsiChar($C0 or (code shr 6));
+      result += AnsiChar($80 or (code and $3F));
     end
     else if (code <= $FFFF) then
     begin
-      result := Char($E0 or (code shr 12));
-      result += Char($80 or ((code shr 6) and $3F));
-      result += Char($80 or (code and $3F));
+      result := AnsiChar($E0 or (code shr 12));
+      result += AnsiChar($80 or ((code shr 6) and $3F));
+      result += AnsiChar($80 or (code and $3F));
     end
     else if (code <= $10FFFF) then
     begin
-      result := Char($F0 or (code shr 18));
-      result += Char($80 or ((code shr 12) and $3F));
-      result += Char($80 or ((code shr 6) and $3F));
-      result += Char($80 or (code and $3F));
+      result := AnsiChar($F0 or (code shr 18));
+      result += AnsiChar($80 or ((code shr 12) and $3F));
+      result += AnsiChar($80 or ((code shr 6) and $3F));
+      result += AnsiChar($80 or (code and $3F));
     end
     else
     begin
@@ -732,10 +843,13 @@ end;
 
 function hasWadExtension (const fn: AnsiString): Boolean;
 var
-  ext: AnsiString;
+  ext, newExt: AnsiString;
 begin
   ext := getFilenameExt(fn);
-  result := StrEquCI1251(ext, '.wad') or StrEquCI1251(ext, '.pk3') or StrEquCI1251(ext, '.zip');
+  result := true;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then exit;
+  result := false;
+  //result := StrEquCI1251(ext, '.wad') or StrEquCI1251(ext, '.pk3') or StrEquCI1251(ext, '.zip') or StrEquCI1251(ext, '.dfz');
 end;
 
 
@@ -746,6 +860,22 @@ begin
 end;
 
 
+function isWadData (data: Pointer; len: LongWord): Boolean;
+  var p: PChar;
+begin
+  p := PChar(data);
+  Result :=
+    (* ZIP *)
+    ((len > 3) and (p[0] = 'P') and (p[1] = 'K') and (p[2] = #03) and (p[3] = #04)) or
+    ((len > 3) and (p[0] = 'P') and (p[1] = 'K') and (p[2] = #05) and (p[3] = #06)) or
+    (* PACK *)
+    ((len > 3) and (p[0] = 'P') and (p[1] = 'A') and (p[2] = 'C') and (p[3] = 'K')) or
+    ((len > 3) and (p[0] = 'S') and (p[1] = 'P') and (p[2] = 'A') and (p[3] = 'K')) or
+    (* DFWAD *)
+    ((len > 5) and (p[0] = 'D') and (p[1] = 'F') and (p[2] = 'W') and (p[3] = 'A') and (p[4] = 'D') and (p[5] = #01))
+end;
+
+
 function isWadPath (const fn: AnsiString): Boolean;
 var
   pos: Integer;
@@ -761,7 +891,7 @@ begin
       if (pos-4 > 1) and (fn[pos-4] = '.') and ((fn[pos+1] = '\') or (fn[pos+1] = '/')) then
       begin
         s := Copy(fn, pos-4, 4);
-        if StrEquCI1251(s, '.wad') or StrEquCI1251(s, '.pk3') or StrEquCI1251(s, '.zip') then
+        if StrEquCI1251(s, '.wad') or StrEquCI1251(s, '.pk3') or StrEquCI1251(s, '.zip') or StrEquCI1251(s, '.dfz') then
         begin
           result := true;
           exit;
@@ -773,7 +903,7 @@ begin
 end;
 
 
-function Int64ToStrComma (i: Int64): AnsiString;
+function int64ToStrComma (i: Int64): AnsiString;
 var
   f: Integer;
 begin
@@ -786,7 +916,7 @@ begin
 end;
 
 
-function UpCase1251 (ch: Char): Char;
+function upcase1251 (ch: AnsiChar): AnsiChar; inline;
 begin
   if ch < #128 then
   begin
@@ -810,7 +940,7 @@ begin
 end;
 
 
-function LoCase1251 (ch: Char): Char;
+function locase1251 (ch: AnsiChar): AnsiChar; inline;
 begin
   if ch < #128 then
   begin
@@ -833,8 +963,18 @@ begin
   result := ch;
 end;
 
+function IsValid1251 (ch: Word): Boolean;
+begin
+  result := (ch = Ord('?')) or (wc2shitmap[ch] <> '?')
+end;
 
-function StrEquCI1251 (const s0, s1: AnsiString): Boolean;
+function IsPrintable1251 (ch: AnsiChar): Boolean;
+begin
+  result := (ch >= #32) and (ch <> #127)
+end;
+
+
+function strEquCI1251 (const s0, s1: AnsiString): Boolean;
 var
   i: Integer;
 begin
@@ -920,7 +1060,7 @@ const
   );
 
 
-function decodeUtf8Char (s: AnsiString; var pos: Integer): char;
+function decodeUtf8Char (s: AnsiString; var pos: Integer): AnsiChar;
 var
   b, c: Integer;
 begin
@@ -938,7 +1078,7 @@ begin
 
   b := Byte(s[pos]);
   Inc(pos);
-  if b < $80 then begin result := char(b); exit; end;
+  if b < $80 then begin result := AnsiChar(b); exit; end;
 
   // mask out unused bits
        if (b and $FE) = $FC then b := b and $01
@@ -959,7 +1099,7 @@ begin
   end;
 
   // done, try 1251
-  for c := 128 to 255 do if uni2wint[c] = b then begin result := char(c and $FF); exit; end;
+  for c := 128 to 255 do if uni2wint[c] = b then begin result := AnsiChar(c and $FF); exit; end;
   // alas
 end;
 
@@ -1051,9 +1191,57 @@ begin
 end;
 
 
+function isWadNamesEqu (wna, wnb: AnsiString): Boolean;
+var
+  ext, newExt: AnsiString;
+  found: Boolean;
+begin
+  result := StrEquCI1251(wna, wnb);
+  if result then exit;
+  // check first ext
+  ext := getFilenameExt(wna);
+  found := false;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
+  if not found then exit;
+  // check second ext
+  ext := getFilenameExt(wnb);
+  found := false;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
+  if not found then exit;
+  wna := forceFilenameExt(wna, '');
+  wnb := forceFilenameExt(wnb, '');
+  result := StrEquCI1251(wna, wnb);
+end;
+
+function findDiskWad (fname: AnsiString): AnsiString;
+var
+  origExt: AnsiString = '';
+  newExt: AnsiString = '';
+begin
+  result := '';
+  //writeln('findDiskWad00: fname=<', fname, '>');
+  if (findFileCI(fname)) then begin result := fname; exit; end;
+  origExt := getFilenameExt(fname);
+  fname := forceFilenameExt(fname, '');
+  //writeln(' findDiskWad01: fname=<', fname, '>; origExt=<', origExt, '>');
+  for newExt in wadExtensions do
+  begin
+    //writeln(' findDiskWad02: fname=<', fname, '>; origExt=<', origExt, '>; newExt=<', newExt, '>');
+    if (StrEquCI1251(newExt, origExt)) then
+    begin
+      //writeln('   SKIP');
+      continue;
+    end;
+    result := fname+newExt;
+    if (findFileCI(result)) then exit;
+  end;
+  result := '';
+end;
+
+
 function openDiskFileRO (pathname: AnsiString): TStream;
 begin
-  if not findFileCI(pathname) then raise Exception.Create('can''t open file "'+pathname+'"');
+  if not findFileCI(pathname) then raise EFileNotFoundException.Create('can''t open file "'+pathname+'"');
   result := TFileStream.Create(pathname, fmOpenRead or {fmShareDenyWrite}fmShareDenyNone);
 end;
 
@@ -1070,6 +1258,30 @@ begin
 end;
 
 
+function openDiskFileRW (pathname: AnsiString): TStream;
+var
+  path: AnsiString;
+  oldname: AnsiString;
+begin
+  //writeln('*** TRYING R/W FILE "', pathname, '"');
+  path := ExtractFilePath(pathname);
+  if length(path) > 0 then
+  begin
+    if not findFileCI(path, true) then raise Exception.Create('can''t create file "'+pathname+'"');
+  end;
+  oldname := pathname;
+  if findFileCI(oldname) then
+  begin
+    //writeln('*** found old file "', oldname, '"');
+    result := TFileStream.Create(oldname, fmOpenReadWrite or fmShareDenyWrite);
+  end
+  else
+  begin
+    result := TFileStream.Create(path+ExtractFileName(pathname), fmCreate);
+  end;
+end;
+
+
 procedure writeIntegerLE (st: TStream; vp: Pointer; size: Integer);
 {$IFDEF ENDIAN_LITTLE}
 begin
@@ -1108,6 +1320,36 @@ begin
 end;
 {$ENDIF}
 
+procedure writeSign (st: TStream; const sign: AnsiString);
+begin
+  if (Length(sign) > 0) then st.WriteBuffer(sign[1], Length(sign));
+end;
+
+function checkSign (st: TStream; const sign: AnsiString): Boolean;
+var
+  buf: packed array[0..7] of AnsiChar;
+  f: Integer;
+begin
+  result := false;
+  if (Length(sign) > 0) then
+  begin
+    if (Length(sign) <= 8) then
+    begin
+      st.ReadBuffer(buf[0], Length(sign));
+      for f := 1 to Length(sign) do if (buf[f-1] <> sign[f]) then exit;
+    end
+    else
+    begin
+      for f := 1 to Length(sign) do
+      begin
+        st.ReadBuffer(buf[0], 1);
+        if (buf[0] <> sign[f]) then exit;
+      end;
+    end;
+  end;
+  result := true;
+end;
+
 procedure writeInt (st: TStream; v: Byte); overload; begin writeIntegerLE(st, @v, 1); end;
 procedure writeInt (st: TStream; v: ShortInt); overload; begin writeIntegerLE(st, @v, 1); end;
 procedure writeInt (st: TStream; v: Word); overload; begin writeIntegerLE(st, @v, 2); end;
@@ -1126,6 +1368,31 @@ procedure writeIntBE (st: TStream; v: LongInt); overload; begin writeIntegerBE(s
 procedure writeIntBE (st: TStream; v: Int64); overload; begin writeIntegerBE(st, @v, 8); end;
 procedure writeIntBE (st: TStream; v: UInt64); overload; begin writeIntegerBE(st, @v, 8); end;
 
+procedure writeBool (st: TStream; b: Boolean); begin writeInt(st, Byte(b)); end;
+function readBool (st: TStream): Boolean; begin result := (readByte(st) <> 0); end;
+
+
+procedure writeStr (st: TStream; const str: AnsiString; maxlen: LongWord=65535);
+begin
+  if (Length(str) > maxlen) then raise XStreamError.Create('string too long');
+  if (maxlen <= 65535) then writeInt(st, Word(Length(str))) else writeInt(st, LongWord(Length(str)));
+  if (Length(str) > 0) then st.WriteBuffer(str[1], Length(str));
+end;
+
+function readStr (st: TStream; maxlen: LongWord=65535): AnsiString;
+var
+  len: Integer;
+begin
+  result := '';
+  if (maxlen <= 65535) then len := readWord(st) else len := Integer(readLongWord(st));
+  if (len < 0) or (len > maxlen) then raise XStreamError.Create('string too long');
+  if (len > 0) then
+  begin
+    SetLength(result, len);
+    st.ReadBuffer(result[1], len);
+  end;
+end;
+
 
 procedure readIntegerLE (st: TStream; vp: Pointer; size: Integer);
 {$IFDEF ENDIAN_LITTLE}
@@ -1195,7 +1462,9 @@ function nmin (a, b: Int64): Int64; inline; overload; begin if (a < b) then resu
 function nmin (a, b: UInt64): UInt64; inline; overload; begin if (a < b) then result := a else result := b; end;
 function nmin (a, b: Single): Single; inline; overload; begin if (a < b) then result := a else result := b; end;
 function nmin (a, b: Double): Double; inline; overload; begin if (a < b) then result := a else result := b; end;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nmin (a, b: Extended): Extended; inline; overload; begin if (a < b) then result := a else result := b; end;
+{$ENDIF}
 
 function nmax (a, b: Byte): Byte; inline; overload; begin if (a > b) then result := a else result := b; end;
 function nmax (a, b: ShortInt): ShortInt; inline; overload; begin if (a > b) then result := a else result := b; end;
@@ -1207,7 +1476,9 @@ function nmax (a, b: Int64): Int64; inline; overload; begin if (a > b) then resu
 function nmax (a, b: UInt64): UInt64; inline; overload; begin if (a > b) then result := a else result := b; end;
 function nmax (a, b: Single): Single; inline; overload; begin if (a > b) then result := a else result := b; end;
 function nmax (a, b: Double): Double; inline; overload; begin if (a > b) then result := a else result := b; end;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nmax (a, b: Extended): Extended; inline; overload; begin if (a > b) then result := a else result := b; end;
+{$ENDIF}
 
 function nclamp (v, a, b: Byte): Byte; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
 function nclamp (v, a, b: ShortInt): ShortInt; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
@@ -1219,8 +1490,9 @@ function nclamp (v, a, b: Int64): Int64; inline; overload; begin if (v < a) then
 function nclamp (v, a, b: UInt64): UInt64; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
 function nclamp (v, a, b: Single): Single; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
 function nclamp (v, a, b: Double): Double; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
+{$IF DEFINED(CPU386) OR DEFINED(CPUAMD64)}
 function nclamp (v, a, b: Extended): Extended; inline; overload; begin if (v < a) then result := a else if (v > b) then result := b else result := v; end;
-
+{$ENDIF}
 
 // ////////////////////////////////////////////////////////////////////////// //
 {$IFDEF WINDOWS}
@@ -1252,7 +1524,7 @@ end;
 *)
 
 
-function formatstrf (const fmt: AnsiString; args: array of const; writerCB: TFormatStrFCallback=nil): AnsiString;
+function formatstrf (const fmt: AnsiString; const args: array of const; writerCB: TFormatStrFCallback=nil): AnsiString;
 const
   PadSpaces: AnsiString = '                                                                       ';
   PadZeroes: AnsiString = '00000000000000000000000000000000000000000000000000000000000000000000000';
@@ -1752,6 +2024,32 @@ begin
 end;
 
 
+function GetDiskFileInfo (fname: AnsiString; var info: TDiskFileInfo): Boolean;
+var
+  age: LongInt;
+  size: LongInt;
+  handle: THandle;
+begin
+  result := false;
+  if (length(fname) = 0) then exit;
+  if not findFileCI(fname) then exit;
+  // get age
+  age := FileAge(fname);
+  if (age = -1) then exit;
+  // get size
+  handle := FileOpen(fname, fmOpenRead or fmShareDenyNone);
+  if (handle = THandle(-1)) then exit;
+  size := FileSeek(handle, 0, fsFromEnd);
+  FileClose(handle);
+  if (size = -1) then exit;
+  // fill info
+  info.diskName := fname;
+  info.size := size;
+  info.age := age;
+  result := true;
+end;
+
+
 (*
 var
   ss: ShortString;