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Code Issues

Avoid integer overflow in date arithmetic - thanks to Claudio

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This commit is contained in:
asfernandes 2007-07-31 15:22:19 +00:00
parent 2ef9d6ae41
commit 6e945e5be7
1 changed files with 4 additions and 2 deletions
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6
src/jrd/SysFunction.cpp
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@ -1388,14 +1388,16 @@ static dsc* evlDateDiff(Jrd::thread_db* tdbb, SysFunction* function, Jrd::jrd_no
break;
case blr_extract_second:
result = oneDay * (timestamp2.value().timestamp_date - timestamp1.value().timestamp_date);
result = (SINT64) oneDay *
(timestamp2.value().timestamp_date - timestamp1.value().timestamp_date);
result += ((SINT64) timestamp2.value().timestamp_time -
(SINT64) timestamp1.value().timestamp_time) /
ISC_TIME_SECONDS_PRECISION;
break;
case blr_extract_millisecond:
result = oneDay * (timestamp2.value().timestamp_date - timestamp1.value().timestamp_date) * 1000;
result = (SINT64) oneDay *
(timestamp2.value().timestamp_date - timestamp1.value().timestamp_date) * 1000;
result += ((SINT64) timestamp2.value().timestamp_time -
(SINT64) timestamp1.value().timestamp_time) /
(ISC_TIME_SECONDS_PRECISION / 1000);