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LazListClasses: fix overflow error

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(cherry picked from commit c34dc52a82)
This commit is contained in:
Martin 2025-06-28 13:33:06 +02:00
parent c400834a6f
commit cd560cc67d
1 changed files with 3 additions and 3 deletions
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6
components/lazutils/lazlistclasses.pas
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@ -799,7 +799,7 @@ begin
// use space at front of list // use space at front of list
i := ACount; i := ACount;
if (AIndex = Cnt) and (CntFreeFront-ACount > CntFreeEnd) then // move all entries; if (AIndex = Cnt) and (CntFreeFront-ACount > CntFreeEnd) then // move all entries;
i := i + Max(Cardinal(CntFreeFront-ACount-CntFreeEnd) div 2 - 1, 0); // Make some room at the end of the list i := i + Max(integer(Cardinal(CntFreeFront-ACount-CntFreeEnd) div 2) - 1, 0); // Make some room at the end of the list
PSource := FMem.FirstItemPointer; PSource := FMem.FirstItemPointer;
PTarget := PSource - (i * FItemSize.ItemSize); PTarget := PSource - (i * FItemSize.ItemSize);
@ -816,7 +816,7 @@ begin
if CanEnd then begin if CanEnd then begin
// use space at end of list // use space at end of list
if (AIndex = 0) and (CntFreeEnd-ACount > CntFreeFront) then // move all entries; if (AIndex = 0) and (CntFreeEnd-ACount > CntFreeFront) then // move all entries;
i := max(Cardinal(CntFreeEnd-ACount-CntFreeFront) div 2 - 1, 0) // Make some room at the end of the list i := max(integer(Cardinal(CntFreeEnd-ACount-CntFreeFront) div 2) - 1, 0) // Make some room at the end of the list
else else
i := 0; i := 0;
@ -837,7 +837,7 @@ begin
begin begin
// split to both ends // split to both ends
assert((cap >= ACount) and (CntFreeFront> 0) and (CntFreeEnd > 0), 'TLazShiftBufferListObj.InsertRows: (cap >= ACount) and (CntFreeFront> 0) and (CntFreeEnd > 0)'); assert((cap >= ACount) and (CntFreeFront> 0) and (CntFreeEnd > 0), 'TLazShiftBufferListObj.InsertRows: (cap >= ACount) and (CntFreeFront> 0) and (CntFreeEnd > 0)');
i := Max(Cardinal(Cap-Cnt-ACount) div 2 - 1, 0); i := Max(integer(Cardinal(Cap-Cnt-ACount) div 2) - 1, 0);
PSource := FMem.FirstItemPointer; PSource := FMem.FirstItemPointer;
PTarget := PSource - ((CntFreeFront - i) * FItemSize.ItemSize); PTarget := PSource - ((CntFreeFront - i) * FItemSize.ItemSize);