Package org.tmatesoft.sqljet.core.internal

Examples of org.tmatesoft.sqljet.core.internal.ISqlJetMemoryPointer.remaining()

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         * Set zIn to point at the start of the input buffer and zTerm to point
         * 1* byte past the end.** Variable zOut is set to point at the output
         * buffer, space obtained* from sqlite3_malloc().
         */
        zOut = SqlJetUtility.translate(pMem.z, pMem.enc, desiredEnc);
        pMem.n = zOut.remaining();

        assert ((pMem.n + (desiredEnc == SqlJetEncoding.UTF8 ? 1 : 2)) <= len);

        pMem.release();
        pMem.flags.removeAll(SqlJetUtility.of(SqlJetVdbeMemFlags.Static, SqlJetVdbeMemFlags.Dyn,
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                // assert( sizeof(u16)==2 );
                // assert( sizeof(Pgno)==4 );
                pBt = new SqlJetBtreeShared();
                pBt.pPager = new SqlJetPager();
                pBt.pPager.open(pVfs, filename, SqlJetBtreeFlags.toPagerFlags(flags), type, permissions);
                pBt.pPager.readFileHeader(zDbHeader.remaining(), zDbHeader);
                pBt.pPager.setBusyhandler(new ISqlJetBusyHandler() {
                    public boolean call(int number) {
                        return invokeBusyHandler(number);
                    }
                });
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                        throw new SqlJetException(errCode);
                    }

                    assert (dbSizeValid);
                    if (dbSize > 0) {
                        PAGERTRACE("CKVERS %s %d\n", PAGERID(), dbFileVers.remaining());
                        fd.read(dbFileVers, dbFileVers.remaining(), 24);
                    } else {
                        SqlJetUtility.memset(dbFileVers, (byte) 0, dbFileVers.remaining());
                    }
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                    }

                    assert (dbSizeValid);
                    if (dbSize > 0) {
                        PAGERTRACE("CKVERS %s %d\n", PAGERID(), dbFileVers.remaining());
                        fd.read(dbFileVers, dbFileVers.remaining(), 24);
                    } else {
                        SqlJetUtility.memset(dbFileVers, (byte) 0, dbFileVers.remaining());
                    }

                    if (SqlJetUtility.memcmp(this.dbFileVers, dbFileVers, dbFileVers.remaining()) != 0) {
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                    assert (dbSizeValid);
                    if (dbSize > 0) {
                        PAGERTRACE("CKVERS %s %d\n", PAGERID(), dbFileVers.remaining());
                        fd.read(dbFileVers, dbFileVers.remaining(), 24);
                    } else {
                        SqlJetUtility.memset(dbFileVers, (byte) 0, dbFileVers.remaining());
                    }

                    if (SqlJetUtility.memcmp(this.dbFileVers, dbFileVers, dbFileVers.remaining()) != 0) {
                        reset();
                    }
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                        fd.read(dbFileVers, dbFileVers.remaining(), 24);
                    } else {
                        SqlJetUtility.memset(dbFileVers, (byte) 0, dbFileVers.remaining());
                    }

                    if (SqlJetUtility.memcmp(this.dbFileVers, dbFileVers, dbFileVers.remaining()) != 0) {
                        reset();
                    }
                }
                assert (SqlJetPagerLockingMode.EXCLUSIVE == lockingMode || SqlJetPagerState.SHARED == state);
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                } catch (SqlJetException e) {
                    rc = e;
                }
            } else {
                try {
                    jfd.write(zeroHdr, zeroHdr.remaining(), 0);
                } catch (SqlJetException e) {
                    rc = e;
                }
            }
            if (rc == null && !noSync) {
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            return null;

        len = read32bits(journal, szJ - 16);
        cksum = read32bitsUnsigned(journal, szJ - 12);

        journal.read(aMagic, aMagic.remaining(), szJ - 8);
        if (0 != SqlJetUtility.memcmp(aMagic, aJournalMagic, aMagic.remaining()))
            return null;

        ISqlJetMemoryPointer zMaster = SqlJetUtility.allocatePtr(len);
        journal.read(zMaster, len, szJ - 16 - len);
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        len = read32bits(journal, szJ - 16);
        cksum = read32bitsUnsigned(journal, szJ - 12);

        journal.read(aMagic, aMagic.remaining(), szJ - 8);
        if (0 != SqlJetUtility.memcmp(aMagic, aJournalMagic, aMagic.remaining()))
            return null;

        ISqlJetMemoryPointer zMaster = SqlJetUtility.allocatePtr(len);
        journal.read(zMaster, len, szJ - 16 - len);
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     * @return
     * @throws SqlJetIOException
     */
    private int read32bits(final ISqlJetFile fd, final long offset) throws SqlJetIOException {
        ISqlJetMemoryPointer ac = SqlJetUtility.allocatePtr(4);
        fd.read(ac, ac.remaining(), offset);
        return SqlJetUtility.get4byte(ac);
    }

    /**
     * @param fd
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