X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fshared%2Fxstreams.pas;h=81a104cc9e33be77409318c25766fcdc5b0382b3;hb=dd0d8ac4cc2a0aa774f25c8a1a774f7358acfae7;hp=5e026e19e6ef9b196087a62e7d5f59d762fd654a;hpb=ac201b02f10ef558087d50f6b03b4519ab567558;p=d2df-sdl.git

diff --git a/src/shared/xstreams.pas b/src/shared/xstreams.pas
index 5e026e1..81a104c 100644
--- a/src/shared/xstreams.pas
+++ b/src/shared/xstreams.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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/>.
+ *)
 // special stream classes
-{$MODE DELPHI}
-{$R+}
+{$INCLUDE a_modes.inc}
+{.$R+}
 unit xstreams;
 
 interface
@@ -301,9 +316,10 @@ begin
   fSize := aSize;
   GetMem(fBuffer, ZBufSize);
   fSkipHeader := aSkipHeader;
+  fSrcStPos := fSrcSt.position;
+  FillChar(fZlibSt, sizeof(fZlibSt), 0);
   if fSkipHeader then err := inflateInit2(fZlibSt, -MAX_WBITS) else err := inflateInit(fZlibSt);
   if err <> Z_OK then raise XStreamError.Create(zerror(err));
-  fSrcStPos := fSrcSt.position;
 end;
 
 
@@ -319,29 +335,31 @@ end;
 function TUnZStream.readBuf (var buffer; count: LongInt): LongInt;
 var
   err: Integer;
-  lastavail: LongInt;
+  sz: LongInt;
 begin
-  fZlibSt.next_out := @buffer;
-  fZlibSt.avail_out := count;
-  lastavail := count;
-  while fZlibSt.avail_out <> 0 do
+  result := 0;
+  if (fSize >= 0) and (fPos >= fSize) then exit;
+  if count > 0 then
   begin
-    if fZlibSt.avail_in = 0 then
+    fZlibSt.next_out := @buffer;
+    fZlibSt.avail_out := count;
+    sz := fZlibSt.avail_out;
+    while fZlibSt.avail_out > 0 do
     begin
-      // refill the buffer
-      fZlibSt.next_in := fBuffer;
-      fZlibSt.avail_in := fSrcSt.read(Fbuffer^, ZBufSize);
-      //Inc(compressed_read, fZlibSt.avail_in);
-      Inc(fPos, lastavail-fZlibSt.avail_out);
-      lastavail := fZlibSt.avail_out;
+      if fZlibSt.avail_in = 0 then
+      begin
+        // refill the buffer
+        fZlibSt.next_in := fBuffer;
+        fZlibSt.avail_in := fSrcSt.read(Fbuffer^, ZBufSize);
+      end;
+      err := inflate(fZlibSt, Z_NO_FLUSH);
+      if (err <> Z_OK) and (err <> Z_STREAM_END) then raise XStreamError.Create(zerror(err));
+      Inc(result, sz-fZlibSt.avail_out);
+      Inc(fPos, sz-fZlibSt.avail_out);
+      sz := fZlibSt.avail_out;
+      if err = Z_STREAM_END then begin fSize := fPos; break; end;
     end;
-    err := inflate(fZlibSt, Z_NO_FLUSH);
-    if err = Z_STREAM_END then fSize := fPos; break;
-    if err <> Z_OK then raise XStreamError.Create(zerror(err));
   end;
-  //if err = Z_STREAM_END then Dec(compressed_read, fZlibSt.avail_in);
-  Inc(fPos, lastavail-fZlibSt.avail_out);
-  result := count-fZlibSt.avail_out;
 end;
 
 
@@ -359,7 +377,7 @@ begin
     //writeln('  reading ', rd, ' bytes...');
     rr := readBuf(buf, rd);
     //writeln('  got ', rr, ' bytes; fPos=', fPos, '; fSkipToPos=', fSkipToPos);
-    if rd <> rr then raise XStreamError.Create('seek error');
+    if rr <= 0 then raise XStreamError.Create('seek error');
   end;
   //writeln('  pos: fPos=', fPos, '; fSkipToPos=', fSkipToPos);
   fSkipToPos := -1;
@@ -379,12 +397,12 @@ begin
     while true do
     begin
       rd := readBuf(buf, 4096);
-      if rd <> 4096 then break;
+      if rd = 0 then break;
     end;
     fSize := fPos;
     //writeln('  unzstream size is ', fSize);
   finally
-    fSkipToPos := opos;
+    if fSkipToPos < 0 then fSkipToPos := opos;
   end;
 end;
 
@@ -407,9 +425,11 @@ procedure TUnZStream.reset ();
 var
   err: Integer;
 begin
+  //writeln('doing RESET');
   fSrcSt.position := fSrcStPos;
   fPos := 0;
   inflateEnd(fZlibSt);
+  FillChar(fZlibSt, sizeof(fZlibSt), 0);
   if fSkipHeader then err := inflateInit2(fZlibSt, -MAX_WBITS) else err := inflateInit(fZlibSt);
   if err <> Z_OK then raise XStreamError.Create(zerror(err));
 end;