1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef DIGRAPH_UTILS_H
18 #define DIGRAPH_UTILS_H
19 
20 #include "defines.h"
21 
22 namespace latinime {
23 
24 class DictionaryHeaderStructurePolicy;
25 
26 class DigraphUtils {
27  public:
28     typedef enum {
29         NOT_A_DIGRAPH_INDEX,
30         FIRST_DIGRAPH_CODEPOINT,
31         SECOND_DIGRAPH_CODEPOINT
32     } DigraphCodePointIndex;
33 
34     typedef enum {
35         DIGRAPH_TYPE_NONE,
36         DIGRAPH_TYPE_GERMAN_UMLAUT,
37     } DigraphType;
38 
39     typedef struct { int first; int second; int compositeGlyph; } digraph_t;
40 
41     static bool hasDigraphForCodePoint(const DictionaryHeaderStructurePolicy *const headerPolicy,
42             const int compositeGlyphCodePoint);
43     static int getDigraphCodePointForIndex(const int compositeGlyphCodePoint,
44             const DigraphCodePointIndex digraphCodePointIndex);
45 
46  private:
47     DISALLOW_IMPLICIT_CONSTRUCTORS(DigraphUtils);
48     static DigraphType getDigraphTypeForDictionary(
49             const DictionaryHeaderStructurePolicy *const headerPolicy);
50     static int getAllDigraphsForDigraphTypeAndReturnSize(
51             const DigraphType digraphType, const digraph_t **const digraphs);
52     static const digraph_t *getDigraphForCodePoint(const int compositeGlyphCodePoint);
53     static const digraph_t *getDigraphForDigraphTypeAndCodePoint(
54             const DigraphType digraphType, const int compositeGlyphCodePoint);
55 
56     static const digraph_t GERMAN_UMLAUT_DIGRAPHS[];
57     static const DigraphType USED_DIGRAPH_TYPES[];
58 };
59 } // namespace latinime
60 #endif // DIGRAPH_UTILS_H
61