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Minor optimization to allocateSpace().

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FossilOrigin-Name: d007bc339b9ea6d59a3dd2b0c5e77e9c801b16f6
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drh
2015-06-25 15:04:56 +00:00
parent 6918095d81
commit ded340e4fc
3 changed files with 15 additions and 10 deletions
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11
src/btree.c
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@@ -1440,9 +1440,14 @@ static int allocateSpace(MemPage *pPage, int nByte, int *pIdx){
** then the cell content offset of an empty page wants to be 65536.
** However, that integer is too large to be stored in a 2-byte unsigned
** integer, so a value of 0 is used in its place. */
top = get2byteNotZero(&data[hdr+5]);
if( gap>top || (u32)top>pPage->pBt->usableSize ){
return SQLITE_CORRUPT_BKPT;
top = get2byte(&data[hdr+5]);
assert( top<=pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
if( gap>top ){
if( top==0 && pPage->pBt->usableSize==65536 ){
top = 65536;
}else{
return SQLITE_CORRUPT_BKPT;
}
}
/* If there is enough space between gap and top for one more cell pointer