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word_altlist.h
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1 /**********************************************************************
2 * File: word_altlist.h
3 * Description: Declaration of the Word Alternate List Class
4 * Author: Ahmad Abdulkader
5 * Created: 2008
6 *
7 * (C) Copyright 2008, Google Inc.
8 ** Licensed under the Apache License, Version 2.0 (the "License");
9 ** you may not use this file except in compliance with the License.
10 ** You may obtain a copy of the License at
11 ** http://www.apache.org/licenses/LICENSE-2.0
12 ** Unless required by applicable law or agreed to in writing, software
13 ** distributed under the License is distributed on an "AS IS" BASIS,
14 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 ** See the License for the specific language governing permissions and
16 ** limitations under the License.
17 *
18 **********************************************************************/
19
20 // The WordAltList abstracts a alternate list of words and their corresponding
21 // costs that result from the word recognition process. The class inherits
22 // from the AltList class
23 // It provides methods to add a new word alternate, its corresponding score and
24 // a tag.
25
26 #ifndef WORD_ALT_LIST_H
27 #define WORD_ALT_LIST_H
28
29 #include "altlist.h"
30
31 namespace tesseract {
32 class WordAltList : public AltList {
33 public:
34 explicit WordAltList(int max_alt);
35 ~WordAltList();
36 // Sort the list of alternates based on cost
37 void Sort();
38 // insert an alternate word with the specified cost and tag
39 bool Insert(char_32 *char_ptr, int cost, void *tag = NULL);
40 // returns the alternate string at the specified position
41 inline char_32 * Alt(int alt_idx) { return word_alt_[alt_idx]; }
42 // print each entry of the altlist, both UTF8 and unichar ids, and
43 // their costs, to stderr
44 void PrintDebug();
45 private:
46 char_32 **word_alt_;
47 };
48 } // namespace tesseract
49
50 #endif // WORD_ALT_LIST_H