Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

Rev

Blame | Last modification | View Log | Download | RSS feed

  1. //===-- GlobPattern.h - glob pattern matcher implementation -*- 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. // This file implements a glob pattern matcher. The glob pattern is the
  10. // rule used by the shell.
  11. //
  12. //===----------------------------------------------------------------------===//
  13.  
  14. #ifndef LLVM_SUPPORT_GLOBPATTERN_H
  15. #define LLVM_SUPPORT_GLOBPATTERN_H
  16.  
  17. #include "llvm/ADT/BitVector.h"
  18. #include "llvm/Support/Error.h"
  19. #include <optional>
  20. #include <vector>
  21.  
  22. // This class represents a glob pattern. Supported metacharacters
  23. // are "*", "?", "\", "[<chars>]", "[^<chars>]", and "[!<chars>]".
  24. namespace llvm {
  25.  
  26. template <typename T> class ArrayRef;
  27. class StringRef;
  28.  
  29. class GlobPattern {
  30. public:
  31.   static Expected<GlobPattern> create(StringRef Pat);
  32.   bool match(StringRef S) const;
  33.  
  34.   // Returns true for glob pattern "*". Can be used to avoid expensive
  35.   // preparation/acquisition of the input for match().
  36.   bool isTrivialMatchAll() const {
  37.     if (Prefix && Prefix->empty()) {
  38.       assert(!Suffix);
  39.       return true;
  40.     }
  41.     return false;
  42.   }
  43.  
  44. private:
  45.   bool matchOne(ArrayRef<BitVector> Pat, StringRef S) const;
  46.  
  47.   // Parsed glob pattern.
  48.   std::vector<BitVector> Tokens;
  49.  
  50.   // The following members are for optimization.
  51.   std::optional<StringRef> Exact;
  52.   std::optional<StringRef> Prefix;
  53.   std::optional<StringRef> Suffix;
  54. };
  55. }
  56.  
  57. #endif // LLVM_SUPPORT_GLOBPATTERN_H
  58.