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JvMemoryData: Check if Offset overflows before adding to it. #114


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commented May 1, 2019

Improved version of #92
Includes raising an exception and is hopefully good enough now.
Fix for Mantis issue 6570

if Offset + FieldLen + 1 <= high(Offset) then
Inc(Offset, FieldLen + 1)
raise EIntOverflow.CreateResFmt(RsEFieldOffsetOverflow, [I]);

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obones May 1, 2019


To me, EIntOverflow is when an Integer value goes over MaxInt and here, I believe it's more an "out of range" issue, so ERangeError seems better to me

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MHumm May 1, 2019

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Ok, added another commit where I changed the exception thrown. I hope it's good for the merge now ;-) When implementing the first variant I really had both exception classes in mind...

@obones obones merged commit a48df1a into project-jedi:master May 1, 2019

@MHumm MHumm deleted the MHumm:Mantis6570_Overflow_in_JvMemoryData_with_exception branch May 2, 2019

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