1 /* 2 * Copyright (C) 2017 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 #ifndef HIDUTIL_HIDLOCAL_H_ 17 #define HIDUTIL_HIDLOCAL_H_ 18 19 #include "HidItem.h" 20 #include "TriState.h" 21 #include <cstddef> 22 #include <vector> 23 24 namespace HidUtil { 25 26 // A set of local states that parser has to keep track during parsing. 27 // They are all specified in HID spec v1.11 section 6.2.2.8 28 struct HidLocal { 29 // add a token to change local states, return value indicates if operation is successful 30 bool append(const HidItem &i); 31 // clear all local states. This need to be done after each main tag 32 void clear(); 33 34 // multiple usage, designator or strings may exist for single input/output/feature report 35 uint32_t getUsage(size_t index) const; 36 uint32_t getDesignator(size_t index) const; 37 uint32_t getString(size_t index) const; 38 39 std::vector<uint32_t> usage; 40 // keep track of usage min when expecting a usage max 41 tri_uint usageMin; 42 43 std::vector<uint32_t> designator; 44 // keep track of designator min when expecting designator max 45 tri_uint designatorMin; 46 47 std::vector<uint32_t> string; 48 // keep track of string min when expecting string max 49 tri_uint stringMin; 50 51 tri_uint delimeter; 52 }; 53 } // namespace HidUtil 54 55 #endif // HIDUTIL_HIDLOCAL_H_ 56