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Guard against unsigned ickyness for files less than 1024 bytes

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Change-Id: I360fb8db35b36194c4f7ae08c93126e2a7bda853
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Tor Lillqvist
2013-02-19 17:38:19 +02:00
parent a062799bd6
commit 95e6a0885e
1 changed files with 7 additions and 1 deletions
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8
extensions/source/macosx/spotlight/OOoSpotlightImporter.m
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@@ -219,8 +219,14 @@ static bool findCentralDirectoryEnd(NSFileHandle *file)
[file seekToFileOffset: (fileLength - 4)]; [file seekToFileOffset: (fileLength - 4)];
unsigned long long limit;
if (fileLength > 1024)
limit = fileLength - 1024;
else
limit = 0;
unsigned long long offset; unsigned long long offset;
while ((offset = [file offsetInFile]) > 0 && offset >= fileLength - 1024) while ((offset = [file offsetInFile]) > limit)
{ {
unsigned signature = readInt(file); unsigned signature = readInt(file);
if (signature == CDIR_END_SIG) if (signature == CDIR_END_SIG)