1 //===- Strings.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_STRINGS_H 10 #define LLD_STRINGS_H 11 12 #include "llvm/ADT/ArrayRef.h" 13 #include "llvm/ADT/Optional.h" 14 #include "llvm/ADT/StringRef.h" 15 #include "llvm/Support/GlobPattern.h" 16 #include <string> 17 #include <vector> 18 19 namespace lld { 20 // Returns a demangled C++ symbol name. If Name is not a mangled 21 // name, it returns name. 22 std::string demangleItanium(llvm::StringRef name); 23 24 std::vector<uint8_t> parseHex(llvm::StringRef s); 25 bool isValidCIdentifier(llvm::StringRef s); 26 27 // Write the contents of the a buffer to a file 28 void saveBuffer(llvm::StringRef buffer, const llvm::Twine &path); 29 30 // A single pattern to match against. A pattern can either be double-quoted 31 // text that should be matched exactly after removing the quoting marks or a 32 // glob pattern in the sense of GlobPattern. 33 class SingleStringMatcher { 34 public: 35 // Create a StringPattern from Pattern to be matched exactly regardless 36 // of globbing characters if ExactMatch is true. 37 SingleStringMatcher(llvm::StringRef Pattern); 38 39 // Match s against this pattern, exactly if ExactMatch is true. 40 bool match(llvm::StringRef s) const; 41 42 // Returns true for pattern "*" which will match all inputs. isTrivialMatchAll()43 bool isTrivialMatchAll() const { 44 return !ExactMatch && GlobPatternMatcher.isTrivialMatchAll(); 45 } 46 47 private: 48 // Whether to do an exact match regardless of wildcard characters. 49 bool ExactMatch; 50 51 // GlobPattern object if not doing an exact match. 52 llvm::GlobPattern GlobPatternMatcher; 53 54 // StringRef to match exactly if doing an exact match. 55 llvm::StringRef ExactPattern; 56 }; 57 58 // This class represents multiple patterns to match against. A pattern can 59 // either be a double-quoted text that should be matched exactly after removing 60 // the quoted marks or a glob pattern. 61 class StringMatcher { 62 private: 63 // Patterns to match against. 64 std::vector<SingleStringMatcher> patterns; 65 66 public: 67 StringMatcher() = default; 68 69 // Matcher for a single pattern. StringMatcher(llvm::StringRef Pattern)70 StringMatcher(llvm::StringRef Pattern) 71 : patterns({SingleStringMatcher(Pattern)}) {} 72 73 // Add a new pattern to the existing ones to match against. addPattern(SingleStringMatcher Matcher)74 void addPattern(SingleStringMatcher Matcher) { patterns.push_back(Matcher); } 75 empty()76 bool empty() const { return patterns.empty(); } 77 78 // Match s against the patterns. 79 bool match(llvm::StringRef s) const; 80 }; 81 82 } // namespace lld 83 84 #endif 85