2 * Copyright (C) 2008, Francisco Claude, all rights reserved.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 #define WT_CODER_HUFF_HDR 2
31 #define WT_CODER_BINARY_HDR 3
33 /** Coder that defines the shape of a wavelet tree
35 * @author Francisco Claude
39 virtual ~wt_coder() {};
40 /** Tells if at level l the symbol is represented by a one or a zero */
41 virtual bool is_set(uint symbol, uint l)=0;
42 /** Tells if the path of symbol becomes unique at level l */
43 virtual bool done(uint symbol, uint l)=0;
44 /** Returns the size of the coder */
45 virtual uint size()=0;
46 /** Saves the coder to a file, returns 0 in case of success */
47 virtual uint save(FILE *fp)=0;
48 /** Loads a coder from a file, returns NULL in case of error */
49 static wt_coder * load(FILE *fp);
52 #include <wt_coder_huff.h>
53 #include <wt_coder_binary.h>