1 /*
2  * Copyright (C) 2014 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 // Definitions internal to Minikin
17 
18 #define LOG_TAG "Minikin"
19 
20 #include <log/log.h>
21 
22 #include "MinikinInternal.h"
23 
24 namespace minikin {
25 
isBMPVariationSelector(uint32_t codePoint)26 inline static bool isBMPVariationSelector(uint32_t codePoint) {
27     return VS1 <= codePoint && codePoint <= VS16;
28 }
29 
isVariationSelectorSupplement(uint32_t codePoint)30 inline static bool isVariationSelectorSupplement(uint32_t codePoint) {
31     return VS17 <= codePoint && codePoint <= VS256;
32 }
33 
getVsIndex(uint32_t codePoint)34 uint16_t getVsIndex(uint32_t codePoint) {
35     if (isBMPVariationSelector(codePoint)) {
36         return codePoint - VS1;
37     } else if (isVariationSelectorSupplement(codePoint)) {
38         return codePoint - VS17 + 16;
39     } else {
40         return INVALID_VS_INDEX;
41     }
42 }
43 
isVariationSelector(uint32_t codePoint)44 bool isVariationSelector(uint32_t codePoint) {
45     return isBMPVariationSelector(codePoint) || isVariationSelectorSupplement(codePoint);
46 }
47 
48 }  // namespace minikin
49