fix: Overflow on Android when overflow check is off. Related to: #123

Spelt · Nov 18, 2022 · 9a0e811 · 9a0e811
1 parent 38d1abe
commit 9a0e811
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/Lib/Classes/Common/ZXing.Common.BitArrayImplementation.pas b/Lib/Classes/Common/ZXing.Common.BitArrayImplementation.pas
@@ -158,7 +158,10 @@ function TBitArrayImplementation.getNextUnset(from: Integer): Integer;
   currentBits := not Fbits[bitsOffset];
 
   // mask off lesser bits first
-  currentBits := currentBits and (not( (1 shl (from and $1F)) - 1));
+  {$OVERFLOWCHECKS OFF}
+  currentBits := currentBits and -(1 shl (from and $1F));
+  {$OVERFLOWCHECKS ON}
+
   while (currentBits = 0) do
   begin
     Inc(bitsOffset);