internal RC clearDatabasePage(Pgno pgno, int freePageFlag, ref int pnChange)
{
var pPage = new MemPage();
Debug.Assert(MutexEx.Held(this.Mutex));
if (pgno > btreePagecount())
{
return(SysEx.SQLITE_CORRUPT_BKPT());
}
var rc = getAndInitPage(pgno, ref pPage);
if (rc != RC.OK)
{
return(rc);
}
for (var i = 0; i < pPage.Cells; i++)
{
var iCell = pPage.FindCell(i);
var pCell = pPage.Data;
if (pPage.Leaf == 0)
{
rc = clearDatabasePage(ConvertEx.Get4(pCell, iCell), 1, ref pnChange);
if (rc != RC.OK)
{
goto cleardatabasepage_out;
}
}
rc = pPage.clearCell(iCell);
if (rc != RC.OK)
{
goto cleardatabasepage_out;
}
}
if (pPage.Leaf == 0)
{
rc = clearDatabasePage(ConvertEx.Get4(pPage.Data, 8), 1, ref pnChange);
if (rc != RC.OK)
{
goto cleardatabasepage_out;
}
}
else
{
pnChange += pPage.Cells;
}
if (freePageFlag != 0)
{
pPage.freePage(ref rc);
}
else if ((rc = Pager.Write(pPage.DbPage)) == RC.OK)
{
pPage.zeroPage(pPage.Data[0] | Btree.PTF_LEAF);
}
cleardatabasepage_out:
pPage.releasePage();
return(rc);
}
internal RC clearDatabasePage(Pgno pgno, int freePageFlag, ref int pnChange)
{
var pPage = new MemPage();
Debug.Assert(MutexEx.Held(this.Mutex));
if (pgno > btreePagecount())
return SysEx.SQLITE_CORRUPT_BKPT();
var rc = getAndInitPage(pgno, ref pPage);
if (rc != RC.OK)
return rc;
for (var i = 0; i < pPage.Cells; i++)
{
var iCell = pPage.FindCell(i);
var pCell = pPage.Data;
if (pPage.Leaf == 0)
{
rc = clearDatabasePage(ConvertEx.Get4(pCell, iCell), 1, ref pnChange);
if (rc != RC.OK)
goto cleardatabasepage_out;
}
rc = pPage.clearCell(iCell);
if (rc != RC.OK)
goto cleardatabasepage_out;
}
if (pPage.Leaf == 0)
{
rc = clearDatabasePage(ConvertEx.Get4(pPage.Data, 8), 1, ref pnChange);
if (rc != RC.OK)
goto cleardatabasepage_out;
}
else
pnChange += pPage.Cells;
if (freePageFlag != 0)
pPage.freePage(ref rc);
else if ((rc = Pager.Write(pPage.DbPage)) == RC.OK)
pPage.zeroPage(pPage.Data[0] | Btree.PTF_LEAF);
cleardatabasepage_out:
pPage.releasePage();
return rc;
}
