1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef COMPILER_PREPROCESSOR_INPUT_H_ 16 #define COMPILER_PREPROCESSOR_INPUT_H_ 17 18 #include <cstddef> 19 #include <vector> 20 #include <climits> 21 22 namespace pp 23 { 24 25 // Holds and reads input for Lexer. 26 class Input 27 { 28 public: 29 Input(); 30 ~Input(); 31 Input(size_t count, const char *const string[], const int length[]); 32 33 size_t count() const { return mCount; } 34 const char *string(size_t index) const { return mString[index]; } 35 size_t length(size_t index) const { return mLength[index]; } 36 37 size_t read(char *buf, size_t maxSize, int *lineNo); 38 39 struct Location 40 { 41 size_t sIndex; // String index; 42 size_t cIndex; // Char index. 43 44 Location() : sIndex(0), cIndex(0) {} 45 }; 46 const Location &readLoc() const { return mReadLoc; } 47 48 private: 49 // Skip a character and return the next character after the one that was skipped. 50 // Return nullptr if data runs out. 51 const char *skipChar(); 52 53 // Input. 54 size_t mCount; 55 const char *const *mString; 56 std::vector<size_t> mLength; 57 58 Location mReadLoc; 59 }; 60 61 } // namespace pp 62 #endif // COMPILER_PREPROCESSOR_INPUT_H_ 63 64
