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fixes bug 207846 "M17 FF09x [@ msvcrt.dll - nsStorageInputStream::Read] Miscellaneous non-repeatable browsing crashes" r=dbradley sr=bzbarsky

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This commit is contained in:
darin%meer.net 2004-09-29 16:45:22 +00:00
parent b534038da0
commit c0d4ded502
1 changed files with 8 additions and 1 deletions
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9
xpcom/io/nsStorageStream.cpp
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@ -313,8 +313,15 @@ nsStorageStream::Seek(PRInt32 aPosition)
mWriteCursor = mSegmentedBuffer->GetSegment(mLastSegmentNum);
NS_ASSERTION(mWriteCursor, "null mWriteCursor");
mSegmentEnd = mWriteCursor + mSegmentSize;
// Adjust write cursor for current segment offset. This test is necessary
// because SegNum may reference the next-to-be-allocated segment, in which
// case we need to be pointing at the end of the last segment.
PRInt32 segmentOffset = SegOffset(aPosition);
mWriteCursor += segmentOffset;
if (segmentOffset == 0 && (SegNum(aPosition) > (PRUint32) mLastSegmentNum))
mWriteCursor = mSegmentEnd;
else
mWriteCursor += segmentOffset;
PR_LOG(StorageStreamLog, PR_LOG_DEBUG,
("nsStorageStream [%x] Seek mWriteCursor=%x mSegmentEnd=%x\n",