X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fsfs%2Fsfs.pas;h=11e1045459cc1e894c28a9f35aa20f0e4bf6aafc;hb=1b91259cc2544a3e3dd76adb5e8f8ef0879fc199;hp=7588ae7fc7bfad89bb544866293272e1dffe887c;hpb=4d17c87d4865a7e2a7089a226238a144bb6c8de2;p=d2df-sdl.git

diff --git a/src/sfs/sfs.pas b/src/sfs/sfs.pas
index 7588ae7..11e1045 100644
--- a/src/sfs/sfs.pas
+++ b/src/sfs/sfs.pas
@@ -1,6 +1,21 @@
+(* 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, 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *)
 // streaming file system (virtual)
-{$MODE DELPHI}
-{.$R-}
+{$INCLUDE ../shared/a_modes.inc}
+{$SCOPEDENUMS OFF}
+{.$R+}
 {.$DEFINE SFS_VOLDEBUG}
 unit sfs;
 
@@ -13,33 +28,29 @@ uses
 type
   ESFSError = class(Exception);
 
-  TSFSChar = AnsiChar;
-  TSFSString = AnsiString;
-
   TSFSVolume = class;
 
   TSFSFileInfo = class
   public
     fOwner: TSFSVolume; // òàê, íà âñÿêèé ñëó÷àé
-    fPath: TSFSString;  // ðàçäåëèòåëè êàòàëîãîâ -- "/"; êîðåíü íèêàê íå îáîçíà÷åí, åñëè íå ïóñòîå, îáÿçàíî çàâåðøàåòñÿ "/"
-    fName: TSFSString;  // òîëüêî èìÿ
+    fPath: AnsiString;  // ðàçäåëèòåëè êàòàëîãîâ -- "/"; êîðåíü íèêàê íå îáîçíà÷åí, åñëè íå ïóñòîå, îáÿçàíî çàâåðøàòüñÿ "/"
+    fName: AnsiString;  // òîëüêî èìÿ
     fSize: Int64;       // unpacked
     fOfs: Int64;        // in VFS (many of 'em need this %-)
 
     constructor Create (pOwner: TSFSVolume);
     destructor Destroy (); override;
 
-    property path: TSFSString read fPath;
-    property name: TSFSString read fName;
-    property size: Int64 read fSize;
+    property path: AnsiString read fPath;
+    property name: AnsiString read fName;
+    property size: Int64 read fSize; // can be -1 if size is unknown
   end;
 
   // âèðòóàëüíàÿ ôàéëîâàÿ ñèñòåìà. ÒÎËÜÊÎ ÄËß ×ÒÅÍÈß!
   // òîì ÍÅ ÄÎËÆÅÍ óáèâàòüñÿ íèêàê èíà÷å, ÷åì ïðè ïîìîùè ôàáðèêè!
   TSFSVolume = class
   protected
-    fRC: Integer; // refcounter for other objects
-    fFileName: TSFSString;// îáû÷íî èìÿ îðèãèíàëüíîãî ôàéëà
+    fFileName: AnsiString;// îáû÷íî èìÿ îðèãèíàëüíîãî ôàéëà
     fFileStream: TStream; // îáû÷íî ïîòîê äëÿ ÷òåíèÿ îðèãèíàëüíîãî ôàéëà
     fFiles: TObjectList;  // TSFSFileInfo èëè íàñëåäíèêè
 
@@ -64,7 +75,7 @@ type
     // ýòà ïðîöåäóðà ìîæåò ìåíÿòü fFiles!
     // fPath -- â ïðàâèëüíîé ôîðìå, ñ "/", êîðíåâîé "/" óáèò, ôèíàëüíûé äîáàâëåí.
     // åñëè ôàéë íå íàéäåí, âåðíóòü -1.
-    function FindFile (const fPath, fName: TSFSString): Integer; virtual;
+    function FindFile (const fPath, fName: AnsiString): Integer; virtual;
 
     // âîçâðàùàåò êîëè÷åñòâî ôàéëîâ â fFiles
     function GetFileCount (): Integer; virtual;
@@ -74,11 +85,9 @@ type
     // íèêàêèõ ïàäåíèé íà íåïðàâèëüíûå èíäåêñû!
     function GetFiles (index: Integer): TSFSFileInfo; virtual;
 
-    procedure removeCommonPath (); virtual;
-
   public
     // pSt íå îáÿçàòåëüíî çàïîìèíàòü, åñëè îí íå íóæåí.
-    constructor Create (const pFileName: TSFSString; pSt: TStream); virtual;
+    constructor Create (const pFileName: AnsiString; pSt: TStream); virtual;
     // fFileStream óíè÷òîæàòü íåëüçÿ, åñëè îí ðàâåí ïàðàìåòðó pSt êîíñòðóêòîðà.
     destructor Destroy (); override;
 
@@ -92,7 +101,7 @@ type
     function OpenFileByIndex (const index: Integer): TStream; virtual; abstract;
 
     // åñëè íå ñìîãëî îòêóïîðèòü ôàéëî (èëè åù¸ ãäå îøèáëîñü), çàøâûðí¸ò èñêëþ÷åíèå.
-    function OpenFileEx (const fName: TSFSString): TStream; virtual;
+    function OpenFileEx (const fName: AnsiString): TStream; virtual;
 
     property FileCount: Integer read GetFileCount; // ìîæåò âåðíóòü íîëü
     // ìîæåò âîçâðàùàòü NIL.
@@ -114,13 +123,13 @@ type
     // ôàéëà. åñëè íè îäíà ôàáðèêà ïðåôèêñ íå ïðèçíàåò, òî ôàéë íå îòêðîþò.
     // èñïîëüçóåòñÿ äëÿ ñêèïàíèÿ àâòîäåòåêòà.
     // SFS ÍÅ Ñ×ÈÒÀÅÒ ÏÐÅÔÈÊÑÎÌ ÑÒÐÎÊÓ ÊÎÐÎ×Å ÒÐ¨Õ ÑÈÌÂÎËÎÂ!
-    function IsMyVolumePrefix (const prefix: TSFSString): Boolean; virtual; abstract;
+    function IsMyVolumePrefix (const prefix: AnsiString): Boolean; virtual; abstract;
     // ïðîâåðÿåò, ìîæåò ëè ôàáðèêà ñäåëàòü òîì äëÿ äàííîãî ôàéëà.
     // st -- îòêðûòûé äëÿ ÷òåíèÿ ôàéëîâé ïîòîê. óêàçàòåëü ÷òåíèÿ ñòîèò â íà÷àëå.
     // ýòîò ïîòîê íåëüçÿ çàêðûâàòü!
     // prefix: òî, ÷òî áûëî ïåðåäàíî â IsMyVolumePrefix() èëè ''.
     // èñêëþ÷åíèå ñ÷èòàåòñÿ îøèáêîé, âîçâðàò NIL ñ÷èòàåòñÿ îøèáêîé.
-    function Produce (const prefix, fileName: TSFSString; st: TStream): TSFSVolume; virtual; abstract;
+    function Produce (const prefix, fileName: AnsiString; st: TStream): TSFSVolume; virtual; abstract;
     // êîãäà òîì áîëüøå íå íóæåí, îí áóäåò îòäàí ôàáðèêå íà ïåðåðàáîòêó.
     // äàëåå äâèæîê íå áóäåò þçàòü ñåé òîì.
     procedure Recycle (vol: TSFSVolume); virtual; abstract;
@@ -167,10 +176,10 @@ procedure SFSUnregisterVolumeFactory (factory: TSFSVolumeFactory);
 // è îáðàùàòüñÿ êàê "datafile::xxx".
 // "||" ïðåîáðàçóþòñÿ â ïðîñòîé "|" è ðàçäåëèòåëåì íå ñ÷èòàþòñÿ.
 // ïðèíèìàåòñÿ âî âíèìàíèå òîëüêî ïîñëåäíÿÿ òðóáà.
-function SFSAddDataFile (const dataFileName: TSFSString; top: Boolean=false): Boolean;
+function SFSAddDataFile (const dataFileName: AnsiString; top: Boolean=false): Boolean;
 
 // äîáàâèòü ñáîðíèê âðåìåííî
-function SFSAddDataFileTemp (const dataFileName: TSFSString; top: Boolean=false): Boolean;
+function SFSAddDataFileTemp (const dataFileName: AnsiString; top: Boolean=false): Boolean;
 
 // äîáàâèòü â ïîñòîÿííûé ñïèñîê ñáîðíèê èç ïîòîêà ds.
 // åñëè âîçâðàùàåò èñòèíó, òî SFS ñòàíîâèòñÿ âëÿäåëüöåì ïîòîêà ds è ñàìà
@@ -183,36 +192,36 @@ function SFSAddDataFileTemp (const dataFileName: TSFSString; top: Boolean=false)
 // âåðí¸ò ëîæü ïðè îøèáêå.
 // îòêðûâàåò ñáîðíèê èç ïîòîêà. dataFileName -- ÂÈÐÒÓÀËÜÍÎÅ èìÿ.
 // ò.å. íà ñàìîì äåëå òàêîãî ôàéëà ìîæåò è íå áûòü íà äèñêå.
-function SFSAddSubDataFile (const virtualName: TSFSString; ds: TStream; top: Boolean=false): Boolean;
+function SFSAddSubDataFile (const virtualName: AnsiString; ds: TStream; top: Boolean=false): Boolean;
 
 // øâûðÿåòñÿ èñêëþ÷åíèÿìè.
 // åñëè fName íå èìååò óêàçàíèÿ íà ôàéë äàííûõ (ýòî òî, ÷òî îòäåëåíî îò
 // îñòàëüíîãî èìåíè äâîåòî÷èåì), òî èùåì ñíà÷àëà ïî âñåì çàðåãèñòðèðîâàííûì
 // ôàéëàì äàííûõ, ïîòîì â òåêóùåì êàòàëîãå, ïîòîì â êàòàëîãå, îòêóäà ñòàðòîâàëè.
 // åñëè íè÷åãî íå íàøëè, êèäàåì èñêëþ÷åíèå.
-function SFSFileOpenEx (const fName: TSFSString): TStream;
+function SFSFileOpenEx (const fName: AnsiString): TStream;
 
 // ïðè îøèáêå -- NIL, è íèêàêèõ èñêëþ÷åíèé.
-function SFSFileOpen (const fName: TSFSString): TStream;
+function SFSFileOpen (const fName: AnsiString): TStream;
 
 // âîçâðàùàåò NIL ïðè îøèáêå.
 // ïîñëå èñïîëüçîâàíèÿ, íàòóðàëüíî, èòåðàòîð íàäî ãðîõíóòü %-)
-function SFSFileList (const dataFileName: TSFSString): TSFSFileList;
+function SFSFileList (const dataFileName: AnsiString): TSFSFileList;
 
-function SFSReplacePathDelims (const s: TSFSString; newDelim: TSFSChar): TSFSString;
-// èãíîðèðóåò ðåãèñòð ñèìâîëîâ
-function SFSStrEqu (const s0, s1: TSFSString): Boolean;
+// çàïðåòèòü îñâîáîæäåíèå âðåìåííûõ òîìîâ (ìîæíî âûçûâàòü ðåêóðñèâíî)
+procedure sfsGCDisable ();
 
-// ðàçîáðàòü òîëñòîå èìÿ ôàéëà, âåðíóòü âèðòóàëüíîå èìÿ ïîñëåäíåãî ñïèñêà
-// èëè ïóñòóþ ñòîðîêó, åñëè ñïèñêîâ íå áûëî.
-function SFSGetLastVirtualName (const fn: TSFSString): string;
+// ðàçðåøèòü îñâîáîæäåíèå âðåìåííûõ òîìîâ (ìîæíî âûçûâàòü ðåêóðñèâíî)
+procedure sfsGCEnable ();
 
-// ïðåîáðàçîâàòü ÷èñëî â ñòðîêó, êðàñèâî ðàçáàâëÿÿ çàïÿòûìè
-function Int64ToStrComma (i: Int64): string;
+// for completeness sake
+procedure sfsGCCollect ();
 
-// `name` will be modified
-// return `true` if file was found
-function sfsFindFileCI (path: string; var name: string): Boolean;
+function SFSReplacePathDelims (const s: AnsiString; newDelim: Char): AnsiString;
+
+// ðàçîáðàòü òîëñòîå èìÿ ôàéëà, âåðíóòü âèðòóàëüíîå èìÿ ïîñëåäíåãî ñïèñêà
+// èëè ïóñòóþ ñòîðîêó, åñëè ñïèñêîâ íå áûëî.
+function SFSGetLastVirtualName (const fn: AnsiString): AnsiString;
 
 // Wildcard matching
 // this code is meant to allow wildcard pattern matches. tt is VERY useful
@@ -230,16 +239,9 @@ function sfsFindFileCI (path: string; var name: string): Boolean;
 //       'this [e-n]s a [!zy]est' -Would match 'this is a test', but would
 //                                 not match 'this as a yest'
 //
-function WildMatch (pattern, text: TSFSString): Boolean;
-function WildListMatch (wildList, text: TSFSString; delimChar: AnsiChar=':'): Integer;
-function HasWildcards (const pattern: TSFSString): Boolean;
-
-// this will compare only last path element from sfspath
-function SFSDFPathEqu (sfspath: string; path: string): Boolean;
-
-function SFSUpCase (ch: Char): Char;
-
-function utf8to1251 (s: TSFSString): TSFSString;
+function WildMatch (pattern, text: AnsiString): Boolean;
+function WildListMatch (wildList, text: AnsiString; delimChar: AnsiChar=':'): Integer;
+function HasWildcards (const pattern: AnsiString): Boolean;
 
 
 var
@@ -255,53 +257,13 @@ var
   // òåêóùåì. êàòàëîãè ðàçäåëÿþòñÿ òðóáîé ("|").
   // <currentdir> çàìåíÿåòñÿ íà òåêóùèé êàòàëîã (ñ çàâåðøàþùèì "/"),
   // <exedir> çàìåíÿåòñÿ íà êàòàëîã, ãäå ñèäèò .EXE (ñ çàâåðøàþùèì "/").
-  sfsDiskDirs: TSFSString = '<currentdir>|<exedir>';
+  sfsDiskDirs: AnsiString = '<currentdir>|<exedir>';
 
 
 implementation
 
 uses
-  xstreams;
-
-
-function Int64ToStrComma (i: Int64): string;
-var
-  f: Integer;
-begin
-  Str(i, result);
-  f := Length(result)+1;
-  while f > 4 do
-  begin
-    Dec(f, 3); Insert(',', result, f);
-  end;
-end;
-
-
-// `name` will be modified
-function sfsFindFileCI (path: string; var name: string): Boolean;
-var
-  sr: TSearchRec;
-  bestname: string = '';
-begin
-  if length(path) = 0 then path := '.';
-  while (length(path) > 0) and (path[length(path)] = '/') do Delete(path, length(path), 1);
-  if (length(path) = 0) or (path[length(path)] <> '/') then path := path+'/';
-  if FileExists(path+name) then begin result := true; exit; end;
-  if FindFirst(path+'*', faAnyFile, sr) = 0 then
-  repeat
-    if (sr.name = '.') or (sr.name = '..') then continue;
-    if (sr.attr and faDirectory) <> 0 then continue;
-    if sr.name = name then
-    begin
-      FindClose(sr);
-      result := true;
-      exit;
-    end;
-    if (length(bestname) = 0) and SFSStrEqu(sr.name, name) then bestname := sr.name;
-  until FindNext(sr) <> 0;
-  FindClose(sr);
-  if length(bestname) > 0 then begin result := true; name := bestname; end else result := false;
-end;
+  xstreams, utils;
 
 
 const
@@ -316,7 +278,7 @@ const
   WILD_CHAR_RANGE_NOT      = '!';
 
 
-function HasWildcards (const pattern: TSFSString): Boolean;
+function HasWildcards (const pattern: AnsiString): Boolean;
 begin
   result :=
     (Pos(WILD_CHAR_ESCAPE, pattern) <> 0) or
@@ -326,7 +288,7 @@ begin
     (Pos(WILD_CHAR_RANGE_OPEN, pattern) <> 0);
 end;
 
-function MatchMask (const pattern: TSFSString; p, pend: Integer; const text: TSFSString; t, tend: Integer): Boolean;
+function MatchMask (const pattern: AnsiString; p, pend: Integer; const text: AnsiString; t, tend: Integer): Boolean;
 var
   rangeStart, rangeEnd: AnsiChar;
   rangeNot, rangeMatched: Boolean;
@@ -414,14 +376,14 @@ begin
 end;
 
 
-function WildMatch (pattern, text: TSFSString): Boolean;
+function WildMatch (pattern, text: AnsiString): Boolean;
 begin
   if pattern <> '' then pattern := AnsiLowerCase(pattern);
   if text <> '' then text := AnsiLowerCase(text);
   result := MatchMask(pattern, 1, -1, text, 1, -1);
 end;
 
-function WildListMatch (wildList, text: TSFSString; delimChar: AnsiChar=':'): Integer;
+function WildListMatch (wildList, text: AnsiString; delimChar: AnsiChar=':'): Integer;
 var
   s, e: Integer;
 begin
@@ -453,9 +415,10 @@ end;
 
 type
   TVolumeInfo = class
+  public
     fFactory: TSFSVolumeFactory;
     fVolume: TSFSVolume;
-    fPackName: TSFSString; // äëÿ îäíîãî è òîãî æå ôàéëà áóäåò òîëüêî îäèí òîì!
+    fPackName: AnsiString; // äëÿ îäíîãî è òîãî æå ôàéëà áóäåò òîëüêî îäèí òîì!
     fStream: TStream; // ôàéëîâûé ïîòîê äëÿ ñáîðíèêà
     fPermanent: Boolean; // èñòèíà -- íå áóäåò óãðîáëåíà, åñëè íå îñòàíåòñÿ íè îäíîãî îòêðûòîãî òîìà
     // èñòèíà -- ýòîò òîì áûë ñîçäàí èç ïîòîêà è íå èìååò äèñêîâîãî ôàéëà, ïîòîìó ôàáðèêå áóäåò ïåðåäàíî íå èìÿ ñáîðíèêà, à ïóñòàÿ ñòðîêà
@@ -478,13 +441,69 @@ type
 var
   factories: TObjectList; // TSFSVolumeFactory
   volumes: TObjectList;   // TVolumeInfo
+  gcdisabled: Integer = 0; // >0: disabled
+
+
+procedure sfsGCCollect ();
+var
+  f, c: Integer;
+  vi: TVolumeInfo;
+  used: Boolean;
+begin
+  // collect garbage
+  f := 0;
+  while f < volumes.Count do
+  begin
+    vi := TVolumeInfo(volumes[f]);
+    if (vi <> nil) and (not vi.fPermanent) and (vi.fOpenedFilesCount = 0) then
+    begin
+      // this volume probably can be removed
+      used := false;
+      c := volumes.Count-1;
+      while not used and (c >= 0) do
+      begin
+        if (c <> f) and (volumes[c] <> nil) then
+        begin
+          used := (TVolumeInfo(volumes[c]).fStream = vi.fStream);
+          if not used then used := (TVolumeInfo(volumes[c]).fVolume.fFileStream = vi.fStream);
+          if used then break;
+        end;
+        Dec(c);
+      end;
+      if not used then
+      begin
+        {$IFDEF SFS_VOLDEBUG}writeln('000: destroying volume "', TVolumeInfo(volumes[f]).fPackName, '"');{$ENDIF}
+        volumes.extract(vi); // remove from list
+        vi.Free; // and kill
+        f := 0;
+        continue;
+      end;
+    end;
+    Inc(f); // next volume
+  end;
+end;
+
+procedure sfsGCDisable ();
+begin
+  Inc(gcdisabled);
+end;
+
+procedure sfsGCEnable ();
+begin
+  Dec(gcdisabled);
+  if gcdisabled <= 0 then
+  begin
+    gcdisabled := 0;
+    sfsGCCollect();
+  end;
+end;
 
 
 // ðàçáèòü èìÿ ôàéëà íà ÷àñòè: ïðåôèêñ ôàéëîâîé ñèñòåìû, èìÿ ôàéëà äàííûõ,
 // ñîáñòâåííî èìÿ ôàéëà
 // èìÿ âûãëÿäèò êàê:
 // (("sfspfx:")?"datafile::")*"filename"
-procedure SplitFName (const fn: string; out dataFile, fileName: string);
+procedure SplitFName (const fn: AnsiString; out dataFile, fileName: AnsiString);
 var
   f: Integer;
 begin
@@ -503,7 +522,7 @@ begin
 end;
 
 // ñàéäýôôåêò: âûðåçàåò âèðòóàëüíîå èìÿ èç dataFile.
-function ExtractVirtName (var dataFile: string): string;
+function ExtractVirtName (var dataFile: AnsiString): AnsiString;
 var
   f: Integer;
 begin
@@ -531,7 +550,7 @@ end;
 // [sfspfx:]datafile[|virtname]
 // åñëè ïåðåä äâîåòî÷èåì ìåíüøå òð¸õ áóêâ, òî ýòî ñ÷èòàåòñÿ íå ïðåôèêñîì,
 // à èìåíåì äèñêà.
-procedure SplitDataName (const fn: string; out pfx, dataFile, virtName: string);
+procedure SplitDataName (const fn: AnsiString; out pfx, dataFile, virtName: AnsiString);
 var
   f: Integer;
 begin
@@ -547,7 +566,7 @@ end;
 
 // íàéòè ïðîèçâîäèòåëÿ äëÿ ýòîãî ôàéëà (åñëè ôàéë óæå îòêðûò).
 // onlyPerm: òîëüêî "ïîñòîÿííûå" ïðîèçâîäèòåëè.
-function FindVolumeInfo (const dataFileName: TSFSString; onlyPerm: Boolean=false): Integer;
+function FindVolumeInfo (const dataFileName: AnsiString; onlyPerm: Boolean=false): Integer;
 var
   f: Integer;
   vi: TVolumeInfo;
@@ -560,7 +579,7 @@ begin
       vi := TVolumeInfo(volumes[f]);
       if not onlyPerm or vi.fPermanent then
       begin
-        if SFSStrEqu(vi.fPackName, dataFileName) then
+        if StrEquCI1251(vi.fPackName, dataFileName) then
         begin
           result := f;
           exit;
@@ -587,66 +606,9 @@ begin
   end;
 end;
 
-function SFSUpCase (ch: Char): Char;
-begin
-  if ch < #128 then
-  begin
-    if (ch >= 'a') and (ch <= 'z') then Dec(ch, 32);
-  end
-  else
-  begin
-    if (ch >= #224) and (ch <= #255) then
-    begin
-      Dec(ch, 32);
-    end
-    else
-    begin
-      case ch of
-        #184, #186, #191: Dec(ch, 16);
-        #162, #179: Dec(ch);
-      end;
-    end;
-  end;
-  result := ch;
-end;
-
-function SFSStrEqu (const s0, s1: TSFSString): Boolean;
-var
-  i: Integer;
-begin
-  //result := (AnsiCompareText(s0, s1) == 0);
-  result := false;
-  if length(s0) <> length(s1) then exit;
-  for i := 1 to length(s0) do
-  begin
-    if SFSUpCase(s0[i]) <> SFSUpCase(s1[i]) then exit;
-  end;
-  result := true;
-end;
-
-// this will compare only last path element from sfspath
-function SFSDFPathEqu (sfspath: string; path: string): Boolean;
-{var
-  i: Integer;}
-begin
-  result := SFSStrEqu(sfspath, path);
-(*
-  if not result and (length(sfspath) > 1) then
-  begin
-    i := length(sfspath);
-    while i > 1 do
-    begin
-      while (i > 1) and (sfspath[i-1] <> '/') do Dec(i);
-      if i <= 1 then exit;
-      writeln('{', sfspath, '} [', Copy(sfspath, i, length(sfspath)), '] : [', path, ']');
-      result := SFSStrEqu(Copy(sfspath, i, length(sfspath)), path);
-    end;
-  end;
-*)
-end;
 
 // adds '/' too
-function normalizePath (fn: string): string;
+function normalizePath (fn: AnsiString): AnsiString;
 var
   i: Integer;
 begin
@@ -672,7 +634,7 @@ begin
   if (length(result) > 0) and (result[length(result)] <> '/') then result := result+'/';
 end;
 
-function SFSReplacePathDelims (const s: TSFSString; newDelim: TSFSChar): TSFSString;
+function SFSReplacePathDelims (const s: AnsiString; newDelim: Char): AnsiString;
 var
   f: Integer;
 begin
@@ -687,9 +649,9 @@ begin
   end;
 end;
 
-function SFSGetLastVirtualName (const fn: TSFSString): string;
+function SFSGetLastVirtualName (const fn: AnsiString): AnsiString;
 var
-  rest, tmp: string;
+  rest, tmp: AnsiString;
   f: Integer;
 begin
   rest := fn;
@@ -708,7 +670,7 @@ var
   used: Boolean; // ôëàæîê çàþçàíîñòè ïîòîêà êåì-òî åù¸
 begin
   if fFactory <> nil then fFactory.Recycle(fVolume);
-  if fVolume <> nil then used := (fVolume.fRC <> 0) else used := false;
+  used := false;
   fVolume := nil;
   fFactory := nil;
   fPackName := '';
@@ -754,12 +716,12 @@ begin
   if fOwner <> nil then
   begin
     Dec(fOwner.fOpenedFilesCount);
-    if not fOwner.fPermanent and (fOwner.fOpenedFilesCount < 1) then
+    if (gcdisabled = 0) and not fOwner.fPermanent and (fOwner.fOpenedFilesCount < 1) then
     begin
       f := volumes.IndexOf(fOwner);
       if f <> -1 then
       begin
-        {$IFDEF SFS_VOLDEBUG}writeln('destroying volume "', TVolumeInfo(volumes[f]).fPackName, '"');{$ENDIF}
+        {$IFDEF SFS_VOLDEBUG}writeln('001: destroying volume "', TVolumeInfo(volumes[f]).fPackName, '"');{$ENDIF}
         volumes[f] := nil; // this will destroy the volume
       end;
     end;
@@ -787,24 +749,19 @@ end;
 
 
 { TSFSVolume }
-constructor TSFSVolume.Create (const pFileName: TSFSString; pSt: TStream);
+constructor TSFSVolume.Create (const pFileName: AnsiString; pSt: TStream);
 begin
   inherited Create();
-  fRC := 0;
   fFileStream := pSt;
   fFileName := pFileName;
   fFiles := TObjectList.Create(true);
 end;
 
-procedure TSFSVolume.removeCommonPath ();
-begin
-end;
-
 procedure TSFSVolume.DoDirectoryRead ();
 var
   f, c: Integer;
   sfi: TSFSFileInfo;
-  tmp: TSFSString;
+  tmp: AnsiString;
 begin
   fFileName := ExpandFileName(SFSReplacePathDelims(fFileName, '/'));
   ReadDirectory();
@@ -831,7 +788,6 @@ begin
     sfi.fPath := normalizePath(sfi.fPath);
     if (length(sfi.fPath) = 0) and (length(sfi.fName) = 0) then sfi.Free else Inc(f);
   end;
-  removeCommonPath();
 end;
 
 destructor TSFSVolume.Destroy ();
@@ -843,11 +799,10 @@ end;
 
 procedure TSFSVolume.Clear ();
 begin
-  fRC := 0; //FIXME
   fFiles.Clear();
 end;
 
-function TSFSVolume.FindFile (const fPath, fName: TSFSString): Integer;
+function TSFSVolume.FindFile (const fPath, fName: AnsiString): Integer;
 begin
   if fFiles = nil then result := -1
   else
@@ -858,8 +813,8 @@ begin
       Dec(result);
       if fFiles[result] <> nil then
       begin
-        if SFSStrEqu(fPath, TSFSFileInfo(fFiles[result]).fPath) and
-           SFSStrEqu(fName, TSFSFileInfo(fFiles[result]).fName) then exit;
+        if StrEquCI1251(fPath, TSFSFileInfo(fFiles[result]).fPath) and
+           StrEquCI1251(fName, TSFSFileInfo(fFiles[result]).fName) then exit;
       end;
     end;
     result := -1;
@@ -881,9 +836,9 @@ begin
   end;
 end;
 
-function TSFSVolume.OpenFileEx (const fName: TSFSString): TStream;
+function TSFSVolume.OpenFileEx (const fName: AnsiString): TStream;
 var
-  fp, fn: TSFSString;
+  fp, fn: AnsiString;
   f, ls: Integer;
 begin
   fp := fName;
@@ -923,12 +878,11 @@ var
 begin
   f := FindVolumeInfoByVolumeInstance(fVolume);
   ASSERT(f <> -1);
-  if fVolume <> nil then Dec(fVolume.fRC);
   Dec(TVolumeInfo(volumes[f]).fOpenedFilesCount);
   // óáü¸ì çàïèñü, åñëè îíà âðåìåííàÿ, è â íåé íåò áîëüøå íè÷åãî îòêðûòîãî
-  if not TVolumeInfo(volumes[f]).fPermanent and (TVolumeInfo(volumes[f]).fOpenedFilesCount < 1) then
+  if (gcdisabled = 0) and not TVolumeInfo(volumes[f]).fPermanent and (TVolumeInfo(volumes[f]).fOpenedFilesCount < 1) then
   begin
-    {$IFDEF SFS_VOLDEBUG}writeln('destroying volume "', TVolumeInfo(volumes[f]).fPackName, '"');{$ENDIF}
+    {$IFDEF SFS_VOLDEBUG}writeln('002: destroying volume "', TVolumeInfo(volumes[f]).fPackName, '"');{$ENDIF}
     volumes[f] := nil;
   end;
   inherited Destroy();
@@ -974,7 +928,7 @@ begin
 end;
 
 
-function SFSAddDataFileEx (dataFileName: TSFSString; ds: TStream; top, permanent: Integer): Integer;
+function SFSAddDataFileEx (dataFileName: AnsiString; ds: TStream; top, permanent: Integer): Integer;
 // dataFileName ìîæåò èìåòü ïðåôèêñ òèïà "zip:" (ñì. âûøå: IsMyPrefix).
 // ìîæåò âûêèíóòü èñêëþ÷åíèå!
 // top:
@@ -995,8 +949,8 @@ var
   vi: TVolumeInfo;
   f: Integer;
   st, st1: TStream;
-  pfx: TSFSString;
-  fn, vfn, tmp: TSFSString;
+  pfx: AnsiString;
+  fn, vfn, tmp: AnsiString;
 begin
   f := Pos('::', dataFileName);
   if f <> 0 then
@@ -1023,7 +977,7 @@ begin
     except
       FreeAndNil(st);
       // óäàëèì íåèñïîëüçóåìûé âðåìåííûé òîì.
-      if not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[result] := nil;
+      if (gcdisabled = 0) and not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[result] := nil;
       raise;
     end;
     // óðà. îòêðûëè ôàéë. êèäàåì â âîçäóõ ÷åï÷èêè, ïðîäîëæàåì ðàçâëå÷åíèå.
@@ -1054,7 +1008,7 @@ begin
   end;
 
   if ds <> nil then st := ds
-  else st := TFileStream.Create(fn, fmOpenRead or fmShareDenyWrite);
+  else st := TFileStream.Create(fn, fmOpenRead or {fmShareDenyWrite}fmShareDenyNone);
   st.Position := 0;
 
   volumes.Pack();
@@ -1105,7 +1059,7 @@ begin
   vi.fOpenedFilesCount := 0;
 end;
 
-function SFSAddSubDataFile (const virtualName: TSFSString; ds: TStream; top: Boolean=false): Boolean;
+function SFSAddSubDataFile (const virtualName: AnsiString; ds: TStream; top: Boolean=false): Boolean;
 var
   tv: Integer;
 begin
@@ -1119,7 +1073,7 @@ begin
   end;
 end;
 
-function SFSAddDataFile (const dataFileName: TSFSString; top: Boolean=false): Boolean;
+function SFSAddDataFile (const dataFileName: AnsiString; top: Boolean=false): Boolean;
 var
   tv: Integer;
 begin
@@ -1132,7 +1086,7 @@ begin
   end;
 end;
 
-function SFSAddDataFileTemp (const dataFileName: TSFSString; top: Boolean=false): Boolean;
+function SFSAddDataFileTemp (const dataFileName: AnsiString; top: Boolean=false): Boolean;
 var
   tv: Integer;
 begin
@@ -1147,10 +1101,10 @@ end;
 
 
 
-function SFSExpandDirName (const s: TSFSString): TSFSString;
+function SFSExpandDirName (const s: AnsiString): AnsiString;
 var
   f, e: Integer;
-  es: TSFSString;
+  es: AnsiString;
 begin
   f := 1; result := s;
   while f < Length(result) do
@@ -1175,9 +1129,9 @@ begin
   end;
 end;
 
-function SFSFileOpenEx (const fName: TSFSString): TStream;
+function SFSFileOpenEx (const fName: AnsiString): TStream;
 var
-  dataFileName, fn: TSFSString;
+  dataFileName, fn: AnsiString;
   f: Integer;
   vi: TVolumeInfo;
   diskChecked: Boolean;
@@ -1186,7 +1140,7 @@ var
   function CheckDisk (): TStream;
   // ïðîâåðèì, åñòü ëè ôàëî fn ãäå-òî íà äèñêàõ.
   var
-    dfn, dirs, cdir: TSFSString;
+    dfn, dirs, cdir: AnsiString;
     f: Integer;
   begin
     result := nil;
@@ -1202,7 +1156,7 @@ var
       cdir := SFSReplacePathDelims(SFSExpandDirName(cdir), '/');
       if cdir[Length(cdir)] <> '/' then cdir := cdir+'/';
       try
-        result := TFileStream.Create(cdir+dfn, fmOpenRead or fmShareDenyWrite);
+        result := TFileStream.Create(cdir+dfn, fmOpenRead or {fmShareDenyWrite}fmShareDenyNone);
         exit;
       except
       end;
@@ -1232,7 +1186,7 @@ begin
       ps := TOwnedPartialStream.Create(vi, result, 0, result.Size, true);
     except
       result.Free();
-      if not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[f] := nil;
+      if (gcdisabled = 0) and not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[f] := nil;
       result := CheckDisk(); // îáëîì ñ datafile, ïðîâåðèì äèñê
       if result = nil then raise ESFSError.Create('file not found: "'+fName+'"');
       exit;
@@ -1277,7 +1231,7 @@ begin
   if result = nil then raise ESFSError.Create('file not found: "'+fName+'"');
 end;
 
-function SFSFileOpen (const fName: TSFSString): TStream;
+function SFSFileOpen (const fName: AnsiString): TStream;
 begin
   try
     result := SFSFileOpenEx(fName);
@@ -1286,7 +1240,7 @@ begin
   end;
 end;
 
-function SFSFileList (const dataFileName: TSFSString): TSFSFileList;
+function SFSFileList (const dataFileName: AnsiString): TSFSFileList;
 var
   f: Integer;
   vi: TVolumeInfo;
@@ -1303,131 +1257,12 @@ begin
 
   try
     result := TSFSFileList.Create(vi.fVolume);
-    Inc(vi.fVolume.fRC);
   except
-    if not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[f] := nil;
+    if (gcdisabled = 0) and not vi.fPermanent and (vi.fOpenedFilesCount < 1) then volumes[f] := nil;
   end;
 end;
 
 
-// ////////////////////////////////////////////////////////////////////////// //
-// utils
-// `ch`: utf8 start
-// -1: invalid utf8
-function utf8CodeLen (ch: Word): Integer;
-begin
-  if ch < $80 then begin result := 1; exit; end;
-  if (ch and $FE) = $FC then begin result := 6; exit; end;
-  if (ch and $FC) = $F8 then begin result := 5; exit; end;
-  if (ch and $F8) = $F0 then begin result := 4; exit; end;
-  if (ch and $F0) = $E0 then begin result := 3; exit; end;
-  if (ch and $E0) = $C0 then begin result := 2; exit; end;
-  result := -1; // invalid
-end;
-
-
-function utf8Valid (s: string): Boolean;
-var
-  pos, len: Integer;
-begin
-  result := false;
-  pos := 1;
-  while pos <= length(s) do
-  begin
-    len := utf8CodeLen(Byte(s[pos]));
-    if len < 1 then exit; // invalid sequence start
-    if pos+len-1 > length(s) then exit; // out of chars in string
-    Dec(len);
-    Inc(pos);
-    // check other sequence bytes
-    while len > 0 do
-    begin
-      if (Byte(s[pos]) and $C0) <> $80 then exit;
-      Dec(len);
-      Inc(pos);
-    end;
-  end;
-  result := true;
-end;
-
-
-// ////////////////////////////////////////////////////////////////////////// //
-const
-  // TODO: move this to a separate file
-  uni2wint: array [128..255] of Word = (
-    $0402,$0403,$201A,$0453,$201E,$2026,$2020,$2021,$20AC,$2030,$0409,$2039,$040A,$040C,$040B,$040F,
-    $0452,$2018,$2019,$201C,$201D,$2022,$2013,$2014,$003F,$2122,$0459,$203A,$045A,$045C,$045B,$045F,
-    $00A0,$040E,$045E,$0408,$00A4,$0490,$00A6,$00A7,$0401,$00A9,$0404,$00AB,$00AC,$00AD,$00AE,$0407,
-    $00B0,$00B1,$0406,$0456,$0491,$00B5,$00B6,$00B7,$0451,$2116,$0454,$00BB,$0458,$0405,$0455,$0457,
-    $0410,$0411,$0412,$0413,$0414,$0415,$0416,$0417,$0418,$0419,$041A,$041B,$041C,$041D,$041E,$041F,
-    $0420,$0421,$0422,$0423,$0424,$0425,$0426,$0427,$0428,$0429,$042A,$042B,$042C,$042D,$042E,$042F,
-    $0430,$0431,$0432,$0433,$0434,$0435,$0436,$0437,$0438,$0439,$043A,$043B,$043C,$043D,$043E,$043F,
-    $0440,$0441,$0442,$0443,$0444,$0445,$0446,$0447,$0448,$0449,$044A,$044B,$044C,$044D,$044E,$044F
-  );
-
-
-function decodeUtf8Char (s: TSFSString; var pos: Integer): char;
-var
-  b, c: Integer;
-begin
-  (* The following encodings are valid, except for the 5 and 6 byte
-   * combinations:
-   *  0xxxxxxx
-   *  110xxxxx 10xxxxxx
-   *  1110xxxx 10xxxxxx 10xxxxxx
-   *  11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-   *  111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-   *  1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-   *)
-  result := '?';
-  if pos > length(s) then exit;
-
-  b := Byte(s[pos]);
-  Inc(pos);
-  if b < $80 then begin result := char(b); exit; end;
-
-  // mask out unused bits
-       if (b and $FE) = $FC then b := b and $01
-  else if (b and $FC) = $F8 then b := b and $03
-  else if (b and $F8) = $F0 then b := b and $07
-  else if (b and $F0) = $E0 then b := b and $0F
-  else if (b and $E0) = $C0 then b := b and $1F
-  else exit; // invalid utf8
-
-  // now continue
-  while pos <= length(s) do
-  begin
-    c := Byte(s[pos]);
-    if (c and $C0) <> $80 then break; // no more
-    b := b shl 6;
-    b := b or (c and $3F);
-    Inc(pos);
-  end;
-
-  // done, try 1251
-  for c := 128 to 255 do if uni2wint[c] = b then begin result := char(c and $FF); exit; end;
-  // alas
-end;
-
-
-function utf8to1251 (s: TSFSString): TSFSString;
-var
-  pos: Integer;
-begin
-  if not utf8Valid(s) then begin result := s; exit; end;
-  pos := 1;
-  while pos <= length(s) do
-  begin
-    if Byte(s[pos]) >= $80 then break;
-    Inc(pos);
-  end;
-  if pos > length(s) then begin result := s; exit; end; // nothing to do here
-  result := '';
-  pos := 1;
-  while pos <= length(s) do result := result+decodeUtf8Char(s, pos);
-end;
-
-
 initialization
   factories := TObjectList.Create(true);
   volumes := TObjectList.Create(true);