예제 #1
0
파일: IdPreMap.java 프로젝트: fpapai/basex
 /**
  * Adds a record to the table and the ID index.
  *
  * @param i index in the table where the record should be inserted
  * @param pre pre value
  * @param fid first ID value
  * @param nid last ID value
  * @param inc increment value
  * @param oid original ID value
  */
 private void add(
     final int i, final int pre, final int fid, final int nid, final int inc, final int oid) {
   if (rows == pres.length) {
     final int s = Array.newSize(rows);
     pres = Arrays.copyOf(pres, s);
     fids = Arrays.copyOf(fids, s);
     nids = Arrays.copyOf(nids, s);
     incs = Arrays.copyOf(incs, s);
     oids = Arrays.copyOf(oids, s);
   }
   if (i < rows) {
     final int destPos = i + 1;
     final int length = rows - i;
     System.arraycopy(pres, i, pres, destPos, length);
     System.arraycopy(fids, i, fids, destPos, length);
     System.arraycopy(nids, i, nids, destPos, length);
     System.arraycopy(incs, i, incs, destPos, length);
     System.arraycopy(oids, i, oids, destPos, length);
   }
   pres[i] = pre;
   fids[i] = fid;
   nids[i] = nid;
   incs[i] = inc;
   oids[i] = oid;
   ++rows;
 }
예제 #2
0
  /**
   * Sets the output text.
   *
   * @param t output text
   * @param s text size
   */
  public final void setText(final byte[] t, final int s) {
    // remove invalid characters and compare old with new string
    int ns = 0;
    final int ts = text.size();
    final byte[] tt = text.text();
    boolean eq = true;
    for (int r = 0; r < s; ++r) {
      final byte b = t[r];
      // support characters, highlighting codes, tabs and newlines
      if (b >= ' ' || b <= TokenBuilder.MARK || b == 0x09 || b == 0x0A) {
        t[ns++] = t[r];
      }
      eq &= ns < ts && ns < s && t[ns] == tt[ns];
    }
    eq &= ns == ts;

    // new text is different...
    if (!eq) {
      text = new BaseXTextTokens(Arrays.copyOf(t, ns));
      rend.setText(text);
      scroll.pos(0);
    }
    if (undo != null) undo.store(t.length != ns ? Arrays.copyOf(t, ns) : t, 0);
    SwingUtilities.invokeLater(calc);
  }
예제 #3
0
 /**
  * Sets the output text.
  *
  * @param text output text
  * @param size text size
  */
 public final void setText(final byte[] text, final int size) {
   byte[] txt = text;
   if (Token.contains(text, '\r')) {
     // remove carriage returns
     int ns = 0;
     for (int r = 0; r < size; ++r) {
       final byte b = text[r];
       if (b != '\r') text[ns++] = b;
     }
     // new text is different...
     txt = Arrays.copyOf(text, ns);
   } else if (text.length != size) {
     txt = Arrays.copyOf(text, size);
   }
   if (editor.text(txt)) {
     if (hist != null) hist.store(txt, editor.pos(), 0);
   }
   if (isShowing()) resizeCode.invokeLater();
 }
예제 #4
0
파일: Data.java 프로젝트: JosuaKrause/basex
 /**
  * Returns the byte buffer.
  *
  * @return byte buffer
  */
 private byte[] buffer() {
   final byte[] bb = bp == b.length ? b : Arrays.copyOf(b, bp);
   bp = 0;
   return bb;
 }
예제 #5
0
  @Override
  public void insert(final int pre, final byte[] entries) {
    final int nnew = entries.length;
    if (nnew == 0) return;
    dirty();

    // number of records to be inserted
    final int nr = nnew >>> IO.NODEPOWER;

    int split = 0;
    if (used == 0) {
      // special case: insert new data into first block if database is empty
      readPage(0);
      usedPages.set(0);
      ++used;
    } else if (pre > 0) {
      // find the offset within the block where the new records will be inserted
      split = cursor(pre - 1) + IO.NODESIZE;
    } else {
      // all insert operations will add data after first node.
      // i.e., there is no "insert before first document" statement
      throw Util.notExpected("Insertion at beginning of populated table.");
    }

    // number of bytes occupied by old records in the current block
    final int nold = npre - fpre << IO.NODEPOWER;
    // number of bytes occupied by old records which will be moved at the end
    final int moved = nold - split;

    // special case: all entries fit in the current block
    Buffer bf = bm.current();
    if (nold + nnew <= IO.BLOCKSIZE) {
      Array.move(bf.data, split, nnew, moved);
      System.arraycopy(entries, 0, bf.data, split, nnew);
      bf.dirty = true;

      // increment first pre-values of blocks after the last modified block
      for (int i = page + 1; i < used; ++i) fpres[i] += nr;
      // update cached variables (fpre is not changed)
      npre += nr;
      meta.size += nr;
      return;
    }

    // append old entries at the end of the new entries
    final byte[] all = new byte[nnew + moved];
    System.arraycopy(entries, 0, all, 0, nnew);
    System.arraycopy(bf.data, split, all, nnew, moved);

    // fill in the current block with new entries
    // number of bytes which fit in the first block
    int nrem = IO.BLOCKSIZE - split;
    if (nrem > 0) {
      System.arraycopy(all, 0, bf.data, split, nrem);
      bf.dirty = true;
    }

    // number of new required blocks and remaining bytes
    final int req = all.length - nrem;
    int needed = req / IO.BLOCKSIZE;
    final int remain = req % IO.BLOCKSIZE;

    if (remain > 0) {
      // check if the last entries can fit in the block after the current one
      if (page + 1 < used) {
        final int o = occSpace(page + 1) << IO.NODEPOWER;
        if (remain <= IO.BLOCKSIZE - o) {
          // copy the last records
          readPage(page + 1);
          bf = bm.current();
          System.arraycopy(bf.data, 0, bf.data, remain, o);
          System.arraycopy(all, all.length - remain, bf.data, 0, remain);
          bf.dirty = true;
          // reduce the pre value, since it will be later incremented with nr
          fpres[page] -= remain >>> IO.NODEPOWER;
          // go back to the previous block
          readPage(page - 1);
        } else {
          // there is not enough space in the block - allocate a new one
          ++needed;
        }
      } else {
        // this is the last block - allocate a new one
        ++needed;
      }
    }

    // number of expected blocks: existing blocks + needed block - empty blocks
    final int exp = blocks + needed - (blocks - used);
    if (exp > fpres.length) {
      // resize directory arrays if existing ones are too small
      final int ns = Math.max(fpres.length << 1, exp);
      fpres = Arrays.copyOf(fpres, ns);
      pages = Arrays.copyOf(pages, ns);
    }

    // make place for the blocks where the new entries will be written
    Array.move(fpres, page + 1, needed, used - page - 1);
    Array.move(pages, page + 1, needed, used - page - 1);

    // write the all remaining entries
    while (needed-- > 0) {
      freeBlock();
      nrem += write(all, nrem);
      fpres[page] = fpres[page - 1] + IO.ENTRIES;
      pages[page] = (int) bm.current().pos;
    }

    // increment all fpre values after the last modified block
    for (int i = page + 1; i < used; ++i) fpres[i] += nr;

    meta.size += nr;

    // update cached variables
    fpre = fpres[page];
    npre = page + 1 < used && fpres[page + 1] < meta.size ? fpres[page + 1] : meta.size;
  }