stability fix for fetching large entries

sawenzel · sawenzel · commit 10d8ced31b63 · 2020-05-28T14:07:31.000+02:00
diff --git a/src/ROOTIOUtilities.cxx b/src/ROOTIOUtilities.cxx
@@ -234,7 +234,9 @@ bool ROOTIOUtilities::fetchData(int event)
   else {
     gotten = mTTree->GetEntry(mTTreeCounter++);
   }
-  return (gotten > 0);
+  // using !=0 since ROOT sometimes gives back negative byte counts
+  // due to overflow
+  return (gotten != 0);
 }
 bool ROOTIOUtilities::flushToTTree()
 {

Original file line number	Diff line number	Diff line change
`@@ -234,7 +234,9 @@ bool ROOTIOUtilities::fetchData(int event)`
`234`	`234`	`else {`
`235`	`235`	`gotten = mTTree->GetEntry(mTTreeCounter++);`
`236`	`236`	`}`
`237`		`- return (gotten > 0);`
	`237`	`+ // using !=0 since ROOT sometimes gives back negative byte counts`
	`238`	`+ // due to overflow`
	`239`	`+ return (gotten != 0);`
`238`	`240`	`}`
`239`	`241`	`bool ROOTIOUtilities::flushToTTree()`
`240`	`242`	`{`