| 1 | //===- Strings.h ------------------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLD_STRINGS_H |
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| 10 | #define LLD_STRINGS_H |
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| 11 | |
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| 12 | #include "llvm/ADT/ArrayRef.h" |
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| 13 | #include "llvm/ADT/SmallVector.h" |
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| 14 | #include "llvm/ADT/StringRef.h" |
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| 15 | #include "llvm/Support/GlobPattern.h" |
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| 16 | #include <string> |
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| 17 | #include <vector> |
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| 18 | |
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| 19 | namespace lld { |
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| 20 | |
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| 21 | llvm::SmallVector<uint8_t, 0> parseHex(llvm::StringRef s); |
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| 22 | bool isValidCIdentifier(llvm::StringRef s); |
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| 23 | |
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| 24 | // Write the contents of the a buffer to a file |
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| 25 | void saveBuffer(llvm::StringRef buffer, const llvm::Twine &path); |
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| 26 | |
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| 27 | // A single pattern to match against. A pattern can either be double-quoted |
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| 28 | // text that should be matched exactly after removing the quoting marks or a |
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| 29 | // glob pattern in the sense of GlobPattern. |
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| 30 | class SingleStringMatcher { |
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| 31 | public: |
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| 32 | // Create a StringPattern from Pattern to be matched exactly regardless |
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| 33 | // of globbing characters if ExactMatch is true. |
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| 34 | SingleStringMatcher(llvm::StringRef Pattern); |
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| 35 | |
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| 36 | // Match s against this pattern, exactly if ExactMatch is true. |
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| 37 | bool match(llvm::StringRef s) const; |
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| 38 | |
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| 39 | // Returns true for pattern "*" which will match all inputs. |
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| 40 | bool isTrivialMatchAll() const { |
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| 41 | return !ExactMatch && GlobPatternMatcher.isTrivialMatchAll(); |
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| 42 | } |
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| 43 | |
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| 44 | private: |
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| 45 | // Whether to do an exact match regardless of wildcard characters. |
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| 46 | bool ExactMatch; |
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| 47 | |
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| 48 | // GlobPattern object if not doing an exact match. |
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| 49 | llvm::GlobPattern GlobPatternMatcher; |
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| 50 | |
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| 51 | // StringRef to match exactly if doing an exact match. |
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| 52 | llvm::StringRef ExactPattern; |
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| 53 | }; |
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| 54 | |
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| 55 | // This class represents multiple patterns to match against. A pattern can |
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| 56 | // either be a double-quoted text that should be matched exactly after removing |
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| 57 | // the quoted marks or a glob pattern. |
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| 58 | class StringMatcher { |
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| 59 | private: |
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| 60 | // Patterns to match against. |
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| 61 | std::vector<SingleStringMatcher> patterns; |
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| 62 | |
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| 63 | public: |
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| 64 | StringMatcher() = default; |
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| 65 | |
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| 66 | // Matcher for a single pattern. |
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| 67 | StringMatcher(llvm::StringRef Pattern) |
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| 68 | : patterns({SingleStringMatcher(Pattern)}) {} |
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| 69 | |
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| 70 | // Add a new pattern to the existing ones to match against. |
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| 71 | void addPattern(SingleStringMatcher Matcher) { patterns.push_back(x: Matcher); } |
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| 72 | |
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| 73 | bool empty() const { return patterns.empty(); } |
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| 74 | |
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| 75 | // Match s against the patterns. |
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| 76 | bool match(llvm::StringRef s) const; |
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| 77 | }; |
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| 78 | |
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| 79 | } // namespace lld |
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| 80 | |
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| 81 | #endif |
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| 82 | |
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