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/SmallVector.h" 14#include "llvm/ADT/StringRef.h" 15#include "llvm/Support/GlobPattern.h" 16#include <string> 17#include <vector> 18 19namespace lld { 20 21llvm::SmallVector<uint8_t, 0> parseHex(llvm::StringRef s); 22bool isValidCIdentifier(llvm::StringRef s); 23 24// Write the contents of the a buffer to a file 25void saveBuffer(llvm::StringRef buffer, const llvm::Twine &path); 26 27// A single pattern to match against. A pattern can either be double-quoted 28// text that should be matched exactly after removing the quoting marks or a 29// glob pattern in the sense of GlobPattern. 30class SingleStringMatcher { 31public: 32 // Create a StringPattern from Pattern to be matched exactly regardless 33 // of globbing characters if ExactMatch is true. 34 SingleStringMatcher(llvm::StringRef Pattern); 35 36 // Match s against this pattern, exactly if ExactMatch is true. 37 bool match(llvm::StringRef s) const; 38 39 // Returns true for pattern "*" which will match all inputs. 40 bool isTrivialMatchAll() const { 41 return !ExactMatch && GlobPatternMatcher.isTrivialMatchAll(); 42 } 43 44private: 45 // Whether to do an exact match regardless of wildcard characters. 46 bool ExactMatch; 47 48 // GlobPattern object if not doing an exact match. 49 llvm::GlobPattern GlobPatternMatcher; 50 51 // StringRef to match exactly if doing an exact match. 52 llvm::StringRef ExactPattern; 53}; 54 55// This class represents multiple patterns to match against. A pattern can 56// either be a double-quoted text that should be matched exactly after removing 57// the quoted marks or a glob pattern. 58class StringMatcher { 59private: 60 // Patterns to match against. 61 std::vector<SingleStringMatcher> patterns; 62 63public: 64 StringMatcher() = default; 65 66 // Matcher for a single pattern. 67 StringMatcher(llvm::StringRef Pattern) 68 : patterns({SingleStringMatcher(Pattern)}) {} 69 70 // Add a new pattern to the existing ones to match against. 71 void addPattern(SingleStringMatcher Matcher) { patterns.push_back(Matcher); } 72 73 bool empty() const { return patterns.empty(); } 74 75 // Match s against the patterns. 76 bool match(llvm::StringRef s) const; 77}; 78 79} // namespace lld 80 81#endif 82