827   u8 *aFrame                      /* OUT: Write encoded frame here */  in walEncodeFrame()  argument
832   sqlite3Put4byte(&aFrame[0], iPage);  in walEncodeFrame()
833   sqlite3Put4byte(&aFrame[4], nTruncate);  in walEncodeFrame()
835     memcpy(&aFrame[8], pWal->hdr.aSalt, 8);  in walEncodeFrame()
838     walChecksumBytes(nativeCksum, aFrame, 8, aCksum, aCksum);  in walEncodeFrame()
841     sqlite3Put4byte(&aFrame[16], aCksum[0]);  in walEncodeFrame()
842     sqlite3Put4byte(&aFrame[20], aCksum[1]);  in walEncodeFrame()
844     memset(&aFrame[8], 0, 16);  in walEncodeFrame()
858   u8 *aFrame                      /* Frame data */  in walDecodeFrame()  argument
868   if( memcmp(&pWal->hdr.aSalt, &aFrame[8], 8)!=0 ){  in walDecodeFrame()
874   pgno = sqlite3Get4byte(&aFrame[0]);  in walDecodeFrame()
885   walChecksumBytes(nativeCksum, aFrame, 8, aCksum, aCksum);  in walDecodeFrame()
887   if( aCksum[0]!=sqlite3Get4byte(&aFrame[16])   in walDecodeFrame()
888    || aCksum[1]!=sqlite3Get4byte(&aFrame[20])   in walDecodeFrame()
898   *pnTruncate = sqlite3Get4byte(&aFrame[4]);  in walDecodeFrame()
1256     u8 *aFrame = 0;               /* Malloc'd buffer to load entire frame */  in walIndexRecover()  local
1311     aFrame = (u8 *)sqlite3_malloc64(szFrame + WALINDEX_PGSZ);  in walIndexRecover()
1312     if( !aFrame ){  in walIndexRecover()
1316     aData = &aFrame[WAL_FRAME_HDRSIZE];  in walIndexRecover()
1338         rc = sqlite3OsRead(pWal->pWalFd, aFrame, szFrame, iOffset);  in walIndexRecover()
1340         isValid = walDecodeFrame(pWal, &pgno, &nTruncate, aData, aFrame);  in walIndexRecover()
1390     sqlite3_free(aFrame);  in walIndexRecover()
2517   u8 *aFrame = 0;                 /* Malloc'd buffer to load entire frame */  in walBeginShmUnreliable()  local
2609   aFrame = (u8 *)sqlite3_malloc64(szFrame);  in walBeginShmUnreliable()
2610   if( aFrame==0 ){  in walBeginShmUnreliable()
2614   aData = &aFrame[WAL_FRAME_HDRSIZE];  in walBeginShmUnreliable()
2630     rc = sqlite3OsRead(pWal->pWalFd, aFrame, szFrame, iOffset);  in walBeginShmUnreliable()
2632     if( !walDecodeFrame(pWal, &pgno, &nTruncate, aData, aFrame) ) break;  in walBeginShmUnreliable()
2646   sqlite3_free(aFrame);  in walBeginShmUnreliable()
3537   u8 aFrame[WAL_FRAME_HDRSIZE];   /* Buffer to assemble frame-header in */  in walWriteOneFrame()  local
3539   walEncodeFrame(p->pWal, pPage->pgno, nTruncate, pData, aFrame);  in walWriteOneFrame()
3540   rc = walWriteToLog(p, aFrame, sizeof(aFrame), iOffset);  in walWriteOneFrame()
3543   rc = walWriteToLog(p, pData, p->szPage, iOffset+sizeof(aFrame));  in walWriteOneFrame()
3559   u8 aFrame[WAL_FRAME_HDRSIZE];   /* Buffer to assemble frame-headers in */  in walRewriteChecksums()  local
3591       walEncodeFrame(pWal, iPgno, nDbSize, &aBuf[WAL_FRAME_HDRSIZE], aFrame);  in walRewriteChecksums()
3592       rc = sqlite3OsWrite(pWal->pWalFd, aFrame, sizeof(aFrame), iOff);  in walRewriteChecksums()