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; }