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      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 
     26 inline static bool isBMPVariationSelector(uint32_t codePoint) {
     27     return VS1 <= codePoint && codePoint <= VS16;
     28 }
     29 
     30 inline static bool isVariationSelectorSupplement(uint32_t codePoint) {
     31     return VS17 <= codePoint && codePoint <= VS256;
     32 }
     33 
     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 
     44 bool isVariationSelector(uint32_t codePoint) {
     45     return isBMPVariationSelector(codePoint) || isVariationSelectorSupplement(codePoint);
     46 }
     47 
     48 }  // namespace minikin
     49