Guard against unsigned ickyness for files less than 1024 bytes

Change-Id: I360fb8db35b36194c4f7ae08c93126e2a7bda853
2013-02-19 17:38:19 +02:00
parent a062799bd6
commit 95e6a0885e
1 changed files with 7 additions and 1 deletions
--- a/extensions/source/macosx/spotlight/OOoSpotlightImporter.m
+++ b/extensions/source/macosx/spotlight/OOoSpotlightImporter.m
@@ -219,8 +219,14 @@ static bool findCentralDirectoryEnd(NSFileHandle *file)

    [file seekToFileOffset: (fileLength - 4)];

+    unsigned long long limit;
+    if (fileLength > 1024)
+        limit = fileLength - 1024;
+    else
+        limit = 0;
+
    unsigned long long offset;
-    while ((offset = [file offsetInFile]) > 0 && offset >= fileLength - 1024)
+    while ((offset = [file offsetInFile]) > limit)
    {
        unsigned signature = readInt(file);
        if (signature == CDIR_END_SIG)