1 //===- ScriptLexer.h --------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLD_ELF_SCRIPT_LEXER_H 10 #define LLD_ELF_SCRIPT_LEXER_H 11 12 #include "lld/Common/LLVM.h" 13 #include "llvm/ADT/StringRef.h" 14 #include "llvm/Support/MemoryBuffer.h" 15 #include <utility> 16 #include <vector> 17 18 namespace lld { 19 namespace elf { 20 21 class ScriptLexer { 22 public: 23 explicit ScriptLexer(MemoryBufferRef mb); 24 25 void setError(const Twine &msg); 26 void tokenize(MemoryBufferRef mb); 27 StringRef skipSpace(StringRef s); 28 bool atEOF(); 29 StringRef next(); 30 StringRef peek(); 31 StringRef peek2(); 32 void skip(); 33 bool consume(StringRef tok); 34 void expect(StringRef expect); 35 bool consumeLabel(StringRef tok); 36 std::string getCurrentLocation(); 37 38 std::vector<MemoryBufferRef> mbs; 39 std::vector<StringRef> tokens; 40 bool inExpr = false; 41 size_t pos = 0; 42 43 size_t lastLineNumber = 0; 44 size_t lastLineNumberOffset = 0; 45 46 protected: 47 MemoryBufferRef getCurrentMB(); 48 49 private: 50 void maybeSplitExpr(); 51 StringRef getLine(); 52 size_t getLineNumber(); 53 size_t getColumnNumber(); 54 }; 55 56 } // namespace elf 57 } // namespace lld 58 59 #endif 60