fixed uninitialized function results

git-svn-id: trunk@16088 -

components/codetools/basiccodetools.pas

@@ -2965,7 +2965,7 @@ end;
 function TextBeginsWith(Txt: PChar; TxtLen: integer; StartTxt: PChar;
     StartTxtLen: integer; CaseSensitive: boolean): boolean;
 begin
-  if TxtLen<StartTxtLen then exit;
+  if TxtLen<StartTxtLen then exit(false);
   Result:=CompareText(Txt,StartTxtLen,StartTxt,StartTxtLen,CaseSensitive)=0;
 end;
 

components/codetools/codeatom.pas

@@ -177,6 +177,7 @@ function AtomPosition(StartPos, EndPos: integer): TAtomPosition;
 begin
   Result.StartPos:=StartPos;
   Result.EndPos:=EndPos;
+  Result.Flag:=cafNone;
 end;
 
 function CodePosition(P: integer; Code: TCodeBuffer): TCodePosition;
@@ -406,6 +407,7 @@ begin
   else begin
     Result.StartPos:=1;
     Result.EndPos:=1;
+    Result.Flag:=cafNone;
   end;
 end;
 

components/codetools/directivestree.pas

@@ -2099,7 +2099,7 @@ var
   function HasCodeBetween(FromPos, ToPos: integer): boolean;
   begin
     if FromPos<1 then FromPos:=1;
-    if FromPos>ToPos then exit;
+    if FromPos>ToPos then exit(false);
     MoveCursorToPos(FromPos);
     ReadNextAtom;
     Result:=AtomStart<ToPos;

components/codetools/finddeclarationtool.pas

@@ -1817,7 +1817,7 @@ end;
 function TFindDeclarationTool.FindUnitCaseInsensitive(var AnUnitName,
   AnUnitInFilename: string): string;
 begin
-  if not CheckDirectoryCache then exit;
+  if not CheckDirectoryCache then exit('');
   Result:=DirectoryCache.FindUnitSourceInCompletePath(
                                               AnUnitName,AnUnitInFilename,true);
 end;

components/codetools/lfmtrees.pas

@@ -431,7 +431,7 @@ end;
 
 function TLFMTree.ParseIfNeeded: boolean;
 begin
-  if not UpdateNeeded then exit;
+  if not UpdateNeeded then exit(true);
   Result:=Parse(LFMBuffer);
 end;
 

components/codetools/resourcecodetool.pas

@@ -82,6 +82,7 @@ function TResourceCodeTool.FindLazarusResourceHeaderComment(
 begin
   Result.StartPos:=-1;
   Result.EndPos:=-1;
+  Result.Flag:=cafNone;
   SetSource(ResourceCode);
 
   Result.StartPos:=FindNextNonSpace(Src,1);

components/codetools/stdcodetools.pas

@@ -1400,6 +1400,8 @@ var LinkIndex: integer;
   CurCode: TCodeBuffer;
 begin
   Result.StartPos:=-1;
+  Result.EndPos:=-1;
+  Result.Flag:=cafNone;
   LinkIndex:=-1;
   CurCode:=FindNextIncludeInInitialization(LinkIndex);
   while (CurCode<>nil) do begin

debugger/debugger.pp

@@ -3301,7 +3301,7 @@ end;
 
 function TDBGCallStack.InternalGetEntry(AIndex: Integer): TCallStackEntry;
 begin
-  if FEntries.GetData(AIndex, Result) then Exit;
+  if FEntries.GetData(AIndex, Result) then Exit(nil);
 
   Result := CreateStackEntry(AIndex);
   if Result = nil then Exit;

designer/designermenu.pp

@@ -655,6 +655,7 @@ function TDesignerMainMenu.GetMaxCoordinates(DesignerMenuItem: PDesignerMenuItem
 var
   temp_coord: TRect;
 begin
+  Result:=Rect(0,0,0,0);
   if (DesignerMenuItem^.coord.Right > Max_Width) then
     Max_Width:=DesignerMenuItem^.coord.Right;
   if (DesignerMenuItem^.coord.Bottom > Max_Height) then

ide/codeexplorer.pas

@@ -1123,7 +1123,7 @@ var
   ChildNode: TTreeNode;
   HasVisibleChilds: Boolean;
 begin
-  if ANode=nil then exit;
+  if ANode=nil then exit(false);
   ChildNode:=ANode.GetFirstChild;
   HasVisibleChilds:=false;
   while ChildNode<>nil do begin

ide/codetoolsdefines.pas

@@ -1391,7 +1391,7 @@ function TCodeToolsDefinesEditor.ConsistencyCheck: integer;
   function CheckNode(ATreeNode: TTreeNode): integer;
   var ADefNode, DummyDefNode: TDefineTemplate;
   begin
-    if ATreeNode=nil then exit;
+    if ATreeNode=nil then exit(0);
     ADefNode:=TDefineTemplate(ATreeNode.Data);
 //writeln(' CheckNode "',ATreeNode.Text,'" "',ADefNode.Name,'"');
     if ADefNode=nil then begin

ide/debugmanager.pas

@@ -1985,7 +1985,7 @@ var
   OldBreakPoint: TIDEBreakPoint;
 begin
   OldBreakPoint:=FBreakPoints.Find(AFilename,ALine);
-  if OldBreakPoint=nil then exit;
+  if OldBreakPoint=nil then exit(mrOk);
   OldBreakPoint.Free;
   Project1.Modified:=true;
   Result := mrOK

ide/diskdiffsdialog.pas

@@ -179,7 +179,7 @@ begin
   if EnvironmentOptions.CheckDiskChangesWithLoading then begin
     CheckUnitsWithLoading;
     CheckPackagesWithLoading;
-    if ListsAreEmpty then exit;
+    if ListsAreEmpty then exit(mrIgnore);
   end;
   DiskDiffsDlg:=TDiskDiffsDlg.Create(nil);
   DiskDiffsDlg.UnitList:=AnUnitList;

ide/helpmanager.pas

@@ -1252,7 +1252,7 @@ begin
   BaseURL:='';
   HTMLHint:='';
   Code:=CodeToolBoss.LoadFile(ExpandedFilename,true,false);
-  if Code=nil then exit;
+  if Code=nil then exit(shrHelpNotFound);
   if CodeHelpBoss.GetHTMLHint(Code,CodePos.X,CodePos.Y,true,
     BaseURL,HTMLHint,CacheWasUsed)=chprSuccess
   then

ide/main.pp

@@ -12522,7 +12522,7 @@ var
   ActiveUnitInfo: TUnitInfo;
   LogCaretXY: TPoint;
 begin
-  if not BeginCodeTool(ActiveSrcEdit,ActiveUnitInfo,[]) then exit;
+  if not BeginCodeTool(ActiveSrcEdit,ActiveUnitInfo,[]) then exit(false);
   {$IFDEF IDE_DEBUG}
   writeln('');
   writeln('[TMainIDE.DoInitIdentCompletion] ************');
@@ -12544,7 +12544,7 @@ var
   ActiveSrcEdit: TSourceEditor;
   ActiveUnitInfo: TUnitInfo;
 begin
-  if not BeginCodeTool(ActiveSrcEdit,ActiveUnitInfo,[]) then exit;
+  if not BeginCodeTool(ActiveSrcEdit,ActiveUnitInfo,[]) then exit(false);
   {$IFDEF IDE_DEBUG}
   writeln('');
   writeln('[TMainIDE.DoShowCodeContext] ************');

ide/sourcemarks.pas

@@ -555,7 +555,7 @@ end;
 
 function TSourceMarks.Add(AMark: TSourceMark): integer;
 begin
-  if AMark=nil then exit;
+  if AMark=nil then exit(-1);
   Result:=fItems.Add(AMark);
   fSortedItems.Add(AMark);
   AMark.FSourceMarks:=Self;

ideintf/idetextconverter.pas

@@ -601,7 +601,9 @@ end;
 function TIDETextConverter.GetTempFilename: string;
 begin
   if TextConverterToolClasses<>nil then
-    Result:=TextConverterToolClasses.GetTempFilename;
+    Result:=TextConverterToolClasses.GetTempFilename
+  else
+    Result:='';
   if Result='' then
     Result:='temp.txt';
 end;

lcl/grids.pas

@@ -1490,7 +1490,6 @@ end;
 function NormalizarRect(const R:TRect): TRect;
 begin
   Result.Left:=Min(R.Left, R.Right);
-
   Result.Top:=Min(R.Top, R.Bottom);
   Result.Right:=Max(R.Left, R.Right);
   Result.Bottom:=Max(R.Top, R.Bottom);
@@ -4398,6 +4397,7 @@ function TCustomGrid.ColRowToOffset(IsCol, Relative: Boolean; Index:Integer;
 var
   Dim: Integer;
 begin
+  Result:=false;
   with FGCache do begin
     if IsCol then begin
       StartPos:=integer(PtrUInt(AccumWidth[index]));

lcl/include/clipbrd.inc

@@ -747,6 +747,7 @@ begin
   if CanReadFromCache then
     Result:=FCount
   else begin
+    Result:=0;
     if ClipboardGetFormats(ClipboardType,Result,List) then begin
       if List<>nil then FreeMem(List);
     end else

lcl/include/intfbasewinapi.inc

@@ -348,7 +348,7 @@ var
   function Breakable(Breaks : TList; Index : Integer) : Boolean;
   begin
     If not Assigned(Breaks) then
-      exit;
+      exit(false);
     Result := Breaks.IndexOf(Pointer(PtrInt(Index))) <> -1;
   end;
 

lcl/interfaces/gtk/gtkcallback.inc

@@ -106,14 +106,14 @@ begin
   // ToDo: Eventually there must be a 'before paint message'.
   if IsAfterGtk then
   begin
-    if TObject(Target) is TCustomControl then exit;
+    if TObject(Target) is TCustomControl then exit(false);
   end else
   begin
-    if not (TObject(Target) is TCustomControl) then exit;
+    if not (TObject(Target) is TCustomControl) then exit(false);
   end;
   {$ENDIF}
   
-  if (not RepaintAll) and ((Area^.Width<1) or (Area^.Height<1)) then exit;
+  if (not RepaintAll) and ((Area^.Width<1) or (Area^.Height<1)) then exit(false);
 
   MSG.Msg := LM_GTKPAINT;
   MSG.Data := TLMGtkPaintData.Create;

lcl/interfaces/gtk/gtklclintf.inc

@@ -942,7 +942,7 @@ function TGtkWidgetSet.AddProcessEventHandler(AHandle: THandle;
 var
   lHandler: PChildSignalEventHandler;
 begin
-  if AEventHandler = nil then exit;
+  if AEventHandler = nil then exit(nil);
   New(lHandler);
   lHandler^.PID := TPid(AHandle);
   lHandler^.UserData := AData;

lcl/interfaces/gtk/gtkproc.inc

@@ -865,6 +865,7 @@ var
   PS : PPaintStruct;
   Widget: PGtkWidget;
 begin
+  FillByte(Result,SizeOf(Result),0);
   Result.Msg := LM_PAINT;
   New(PS);
   FillChar(PS^, SizeOf(TPaintStruct), 0);
@@ -5292,7 +5293,7 @@ end;
 function SetAccelKey(const Widget: PGtkWidget;
   Key: guint; Mods: TGdkModifierType; const Signal: string): PAcceleratorKey;
 begin
-  if (Widget = nil) then exit;
+  if (Widget = nil) then exit(nil);
   Result:=GetAccelKey(Widget);
   if Result=nil then begin
     if Key>0 then begin
@@ -9473,6 +9474,7 @@ function GetWindowFunction(AForm : TCustomForm) : Longint;
 var
   ABorderStyle: TFormBorderStyle;
 begin
+  Result:=0;
   if not (csDesigning in AForm.ComponentState) then
     ABorderStyle:=AForm.BorderStyle
   else

lcl/interfaces/gtk/gtkthemes.pas

@@ -198,6 +198,7 @@ var
   DevCtx: TGtkDeviceContext absolute DC;
   ClientWidget: PGtkWidget;
 begin
+  FillByte(Result,SizeOf(Result),0);
   Result.Style := nil;
   if not GTKWidgetSet.IsValidDC(DC) then Exit;
   

lcl/interfaces/gtk/gtkwinapi.inc

@@ -8543,7 +8543,7 @@ var
   NewTopLevelObject: TObject;
   NewForm: TCustomForm;
 begin
-  if hWnd=0 then exit;
+  if hWnd=0 then exit(0);
   Widget:=PGtkWidget(hWnd);
   {$IfDef VerboseFocus}
   DebugLn('');

lcl/interfaces/gtk2/gtk2wscustomlistview.inc

@@ -755,6 +755,7 @@ var
   Iter: TGtkTreeIter;
   AValue: gboolean;
 begin
+  Result:=false;
   if not WSCheckHandleAllocated(ALV, 'ItemGetChecked')
   then Exit;
 

lcl/interfaces/gtk2/gtk2wsmenus.pp

@@ -303,6 +303,7 @@ var
   Group: PGSList;
   Item: Pointer;
 begin
+  Result:=false;
   if not WSCheckMenuItem(AMenuItem, 'SetCheck') then
     Exit;
   Item := Pointer(AMenuItem.Handle);

lcl/interfaces/gtk2/gtk2wsstdctrls.pp

@@ -736,6 +736,7 @@ class function TGtk2WSCustomListBox.GetStrings(
 var
   Widget: PGtkWidget;// pointer to gtk-widget
 begin
+  Result:=nil;
   if not WSCheckHandleAllocated(ACustomListBox, 'GetStrings') then
     Exit;
   case ACustomListBox.fCompStyle of

lcl/intfgraphics.pas

@@ -658,6 +658,7 @@ end;
 function QueryDescription(AFlags: TRawImageQueryFlags; AWidth: Integer = -1; AHeight: integer = -1): TRawImageDescription;
 begin
   Exclude(AFlags, riqfUpdate);
+  Result.Init;
   QueryDescription(Result, AFlags, AWidth, AHeight);
 end;
 
@@ -671,7 +672,6 @@ begin
   else begin
     if not (riqfUpdate in AFlags) then ADesc.Init;
   end;
-  
 end;
 
 function GetDescriptionFromDevice(ADC: HDC; AWidth, AHeight: integer): TRawImageDescription;
@@ -698,9 +698,10 @@ function AddAlphaToDescription(var ADesc: TRawImageDescription; APrec: Byte): Bo
 var
   Mask: Cardinal;
 begin
-  if ADesc.AlphaPrec >= APrec then Exit(False);
-  if ADesc.BitsPerPixel <> 32 then Exit(False);
-  if ADesc.Depth <> 24 then Exit(False);
+  Result:=false;
+  if ADesc.AlphaPrec >= APrec then Exit;
+  if ADesc.BitsPerPixel <> 32 then Exit;
+  if ADesc.Depth <> 24 then Exit;
 
   Mask := CreateBitMask(ADesc.RedShift, ADesc.RedPrec)
        or CreateBitMask(ADesc.GreenShift, ADesc.GreenPrec)

lcl/lclproc.pas

@@ -2910,7 +2910,7 @@ begin
     else
     begin
       if SrcI >= SrcCharCount then
-        if UnfinishedCharError then Exit
+        if UnfinishedCharError then Exit(trInvalidChar)
         else Break;
 
       B2 := Byte(Src[SrcI]);
@@ -2924,12 +2924,12 @@ begin
           Inc(DestI);
         end
         else // invalid character, assume single byte UTF-8 char
-          if InvalidCharError(1) then Exit;
+          if InvalidCharError(1) then Exit(trInvalidChar);
       end
       else
       begin
         if SrcI >= SrcCharCount then
-          if UnfinishedCharError then Exit
+          if UnfinishedCharError then Exit(trInvalidChar)
           else Break;
 
         B3 := Byte(Src[SrcI]);
@@ -2955,12 +2955,12 @@ begin
             end;
           end
           else // invalid character, assume single byte UTF-8 char
-            if InvalidCharError(2) then Exit;
+            if InvalidCharError(2) then Exit(trInvalidChar);
         end
         else
         begin
           if SrcI >= SrcCharCount then
-            if UnfinishedCharError then Exit
+            if UnfinishedCharError then Exit(trInvalidChar)
             else Break;
 
           B4 := Byte(Src[SrcI]);
@@ -2979,7 +2979,7 @@ begin
             Inc(DestI);
           end
           else // invalid character, assume single byte UTF-8 char
-            if InvalidCharError(3) then Exit;
+            if InvalidCharError(3) then Exit(trInvalidChar);
         end;
       end;
     end;
@@ -3115,7 +3115,7 @@ begin
     else
     begin
       if SrcI >= SrcWideCharCount then
-        if UnfinishedCharError then Exit
+        if UnfinishedCharError then Exit(trInvalidChar)
         else Break;
 
       W2 := Word(Src[SrcI]);
@@ -3155,13 +3155,13 @@ begin
             end;
           end
           else // invalid character, assume single wide char UTF-16 char
-            if InvalidCharError(1) then Exit;
+            if InvalidCharError(1) then Exit(trInvalidChar);
         end
         else // invalid character, assume single wide char UTF-16 char
-          if InvalidCharError(1) then Exit;
+          if InvalidCharError(1) then Exit(trInvalidChar);
       end
       else // invalid character, assume single wide char UTF-16 char
-        if InvalidCharError(1) then Exit;
+        if InvalidCharError(1) then Exit(trInvalidChar);
     end;
   end;
 

lcl/lresources.pp

@@ -1533,6 +1533,7 @@ begin
     dvaInt32:
       Read(Result, SizeOf(Result));
   else
+    Result:=0;
     PropValueError;
   end;
 end;
@@ -1745,6 +1746,7 @@ begin
     dvaNull:
       Result := 'Null';
   else
+    Result:='';
     PropValueError;
   end;
 end;
@@ -3728,6 +3730,9 @@ begin
       Result := 'True';
     vaNull:
       Result := 'Null';
+  else
+    Result:='';
+    RaiseGDBException('');
   end;
 end;
 
@@ -3824,7 +3829,6 @@ begin
     Read(Pointer(@Result[1])^, i);
 end;
 
-
 function TLRSObjectReader.ReadWideString: WideString;
 var
   i: Integer;

packager/packageeditor.pas

@@ -1985,7 +1985,7 @@ end;
 
 function TPackageEditorForm.CanBeAddedToProject: boolean;
 begin
-  if LazPackage=nil then exit;
+  if LazPackage=nil then exit(false);
   Result:=PackageEditors.AddToProject(LazPackage,true)=mrOk;
 end;
 

packager/pkgmanager.pas

@@ -816,7 +816,7 @@ function TPkgManager.OnPackageEditorRevertPackage(Sender: TObject;
 begin
   if APackage.AutoCreated or (not FilenameIsAbsolute(APackage.Filename))
   or (not FileExists(APackage.Filename)) then
-    exit;
+    exit(mrCancel);
   Result:=DoOpenPackageFile(APackage.Filename,[pofRevert]);
 end;
 
@@ -918,7 +918,7 @@ end;
 function TPkgManager.PackageGraphExplorerOpenProject(Sender: TObject;
   AProject: TProject): TModalResult;
 begin
-  if AProject<>Project1 then exit;
+  if AProject<>Project1 then exit(mrCancel);
   Result:=MainIDE.DoShowProjectInspector;
 end;