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  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.  
  19. namespace lld {
  20.  
  21. llvm::SmallVector<uint8_t, 0> parseHex(llvm::StringRef s);
  22. bool isValidCIdentifier(llvm::StringRef s);
  23.  
  24. // Write the contents of the a buffer to a file
  25. void 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.
  30. class SingleStringMatcher {
  31. public:
  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.  
  44. private:
  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.
  58. class StringMatcher {
  59. private:
  60.   // Patterns to match against.
  61.   std::vector<SingleStringMatcher> patterns;
  62.  
  63. public:
  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.