internal static void checkList(IntegrityCk pCheck, int isFreeList, int iPage, int N, string zContext)
{
int i;
int expected = N;
int iFirst = iPage;
while (N-- > 0 && pCheck.mxErr != 0)
{
var pOvflPage = new PgHdr();
if (iPage < 1)
{
checkAppendMsg(pCheck, zContext, "%d of %d pages missing from overflow list starting at %d", N + 1, expected, iFirst);
break;
}
if (checkRef(pCheck, (uint)iPage, zContext) != 0)
{
break;
}
byte[] pOvflData;
if (Pager.sqlite3PagerGet(pCheck.pPager, (Pgno)iPage, ref pOvflPage) != 0)
{
checkAppendMsg(pCheck, zContext, "failed to get page %d", iPage);
break;
}
pOvflData = Pager.sqlite3PagerGetData(pOvflPage);
if (isFreeList != 0)
{
int n = (int)ConvertEx.sqlite3Get4byte(pOvflData, 4);
#if !SQLITE_OMIT_AUTOVACUUM
if (pCheck.pBt.autoVacuum)
{
checkPtrmap(pCheck, (uint)iPage, PTRMAP_FREEPAGE, 0, zContext);
}
#endif
if (n > (int)pCheck.pBt.usableSize / 4 - 2)
{
checkAppendMsg(pCheck, zContext, "freelist leaf count too big on page %d", iPage);
N--;
}
else
{
for (i = 0; i < n; i++)
{
Pgno iFreePage = ConvertEx.sqlite3Get4byte(pOvflData, 8 + i * 4);
#if !SQLITE_OMIT_AUTOVACUUM
if (pCheck.pBt.autoVacuum)
{
checkPtrmap(pCheck, iFreePage, PTRMAP_FREEPAGE, 0, zContext);
}
#endif
checkRef(pCheck, iFreePage, zContext);
}
N -= n;
}
}
#if !SQLITE_OMIT_AUTOVACUUM
else
{
/* If this database supports auto-vacuum and iPage is not the last
** page in this overflow list, check that the pointer-map entry for
** the following page matches iPage.
*/
if (pCheck.pBt.autoVacuum && N > 0)
{
i = (int)ConvertEx.sqlite3Get4byte(pOvflData);
checkPtrmap(pCheck, (uint)i, PTRMAP_OVERFLOW2, (uint)iPage, zContext);
}
}
#endif
iPage = (int)ConvertEx.sqlite3Get4byte(pOvflData);
Pager.sqlite3PagerUnref(pOvflPage);
}
}
