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Fix a case in fts4 where a corrupt %_stat table could lead to a crash.

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FossilOrigin-Name: 4ade96ce974244fc34bb97713d3cba10e3d33056
This commit is contained in:
dan
2011-02-01 17:55:48 +00:00
parent a240fd01b6
commit 0bfda98155
5 changed files with 50 additions and 18 deletions
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5
ext/fts3/fts3_snippet.c
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@ -960,6 +960,7 @@ static int fts3MatchinfoSelectDoctotal(
a = sqlite3_column_blob(pStmt, 0);
a += sqlite3Fts3GetVarint(a, &nDoc);
if( nDoc==0 ) return SQLITE_CORRUPT;
*pnDoc = (u32)nDoc;
if( paLen ) *paLen = a;
@ -1166,9 +1167,11 @@ static int fts3MatchinfoValues(
if( rc==SQLITE_OK ){
int iCol;
for(iCol=0; iCol<pInfo->nCol; iCol++){
u32 iVal;
sqlite3_int64 nToken;
a += sqlite3Fts3GetVarint(a, &nToken);
pInfo->aMatchinfo[iCol] = (u32)(((u32)(nToken&0xffffffff)+nDoc/2)/nDoc);
iVal = (u32)(((u32)(nToken&0xffffffff)+nDoc/2)/nDoc);
pInfo->aMatchinfo[iCol] = iVal;
}
}
}