1355   sqlite3_int64 iOfst    /* Start reading here */  in inmemRead()  argument
1359   if( iOfst<0 || iOfst>=pVFile->sz ){  in inmemRead()
1363   if( iOfst+iAmt>pVFile->sz ){  in inmemRead()
1365     iAmt = (int)(pVFile->sz - iOfst);  in inmemRead()
1366     memcpy(pData, pVFile->a + iOfst, iAmt);  in inmemRead()
1369   memcpy(pData, pVFile->a + iOfst, iAmt);  in inmemRead()
1376   sqlite3_int64 iOfst    /* Start writing here */  in inmemWrite()  argument
1380   if( iOfst+iAmt > pVFile->sz ){  in inmemWrite()
1381     if( iOfst+iAmt >= MX_FILE_SZ ){  in inmemWrite()
1384     pVFile->a = safe_realloc(pVFile->a, (int)(iOfst+iAmt));  in inmemWrite()
1385     if( iOfst > pVFile->sz ){  in inmemWrite()
1386       memset(pVFile->a + pVFile->sz, 0, (int)(iOfst - pVFile->sz));  in inmemWrite()
1388     pVFile->sz = (int)(iOfst + iAmt);  in inmemWrite()
1390   memcpy(pVFile->a + iOfst, pData, iAmt);  in inmemWrite()