int readInt()

in mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java [1372:1429]
39 lines of code
8 McCabe index (conditional complexity)

    /* no qualifier */int readInt( PageIO[] pageIos, long position )
    {
        // Compute the page in which we will store the data given the
        // current position
        int pageNb = computePageNb( position );

        // Compute the position in the current page
        int pagePos = ( int ) ( position + ( pageNb + 1 ) * LONG_SIZE + INT_SIZE ) - pageNb * pageSize;

        ByteBuffer pageData = pageIos[pageNb].getData();
        int remaining = pageData.capacity() - pagePos;
        int value = 0;

        if ( remaining >= INT_SIZE )
        {
            value = pageData.getInt( pagePos );
        }
        else
        {
            value = 0;

            switch ( remaining )
            {
                case 3:
                    value += ( ( pageData.get( pagePos + 2 ) & 0x00FF ) << 8 );
                    // Fallthrough !!!

                case 2:
                    value += ( ( pageData.get( pagePos + 1 ) & 0x00FF ) << 16 );
                    // Fallthrough !!!

                case 1:
                    value += ( pageData.get( pagePos ) << 24 );
                    break;
            }

            // Now deal with the next page
            pageData = pageIos[pageNb + 1].getData();
            pagePos = LINK_SIZE;

            switch ( remaining )
            {
                case 1:
                    value += ( pageData.get( pagePos ) & 0x00FF ) << 16;
                    // fallthrough !!!

                case 2:
                    value += ( pageData.get( pagePos + 2 - remaining ) & 0x00FF ) << 8;
                    // fallthrough !!!

                case 3:
                    value += ( pageData.get( pagePos + 3 - remaining ) & 0x00FF );
                    break;
            }
        }

        return value;
    }