1 /* 2 * Copyright 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 17 #ifndef IMG_UTILS_ORDERABLE 18 #define IMG_UTILS_ORDERABLE 19 20 #include <cutils/compiler.h> 21 #include <stdint.h> 22 23 namespace android { 24 namespace img_utils { 25 26 #define COMPARE_DEF(op) \ 27 inline bool operator op (const Orderable& orderable) const; 28 29 /** 30 * Subclasses of Orderable can be compared and sorted. This is 31 * intended to be used to create sorted arrays of TIFF entries 32 * and IFDs. 33 */ 34 class ANDROID_API Orderable { 35 public: 36 virtual ~Orderable(); 37 38 /** 39 * Comparison operatotors are based on the value returned 40 * from this method. 41 */ 42 virtual uint32_t getComparableValue() const = 0; 43 44 COMPARE_DEF(>) 45 COMPARE_DEF(<) 46 COMPARE_DEF(>=) 47 COMPARE_DEF(<=) 48 COMPARE_DEF(==) 49 COMPARE_DEF(!=) 50 }; 51 52 #undef COMPARE_DEF 53 54 } /*namespace img_utils*/ 55 } /*namespace android*/ 56 57 #endif /*IMG_UTILS_ORDERABLE*/ 58