1 files changed, 56 insertions, 0 deletions
diff --git a/clang-include-fixer/find-all-symbols/HeaderMapCollector.h b/clang-include-fixer/find-all-symbols/HeaderMapCollector.h
new file mode 100644
index 00000000..21358275
--- /dev/null
+++ b/clang-include-fixer/find-all-symbols/HeaderMapCollector.h
@@ -0,0 +1,56 @@
+//===-- HeaderMapCoolector.h - find all symbols------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_FIND_ALL_SYMBOLS_HEADER_MAP_COLLECTOR_H
+#define LLVM_CLANG_TOOLS_EXTRA_FIND_ALL_SYMBOLS_HEADER_MAP_COLLECTOR_H
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Support/Regex.h"
+#include <string>
+#include <vector>
+
+namespace clang {
+namespace find_all_symbols {
+
+/// \brief HeaderMappCollector collects all remapping header files. This maps
+/// complete header names or header name regex patterns to header names.
+class HeaderMapCollector {
+public:
+  typedef llvm::StringMap<std::string> HeaderMap;
+  typedef std::vector<std::pair<const char *, const char *>> RegexHeaderMap;
+
+  HeaderMapCollector() = default;
+  explicit HeaderMapCollector(const RegexHeaderMap *RegexHeaderMappingTable);
+
+  void addHeaderMapping(llvm::StringRef OrignalHeaderPath,
+                        llvm::StringRef MappingHeaderPath) {
+    HeaderMappingTable[OrignalHeaderPath] = MappingHeaderPath;
+  };
+
+  /// Check if there is a mapping from \p Header or a regex pattern that matches
+  /// it to another header name.
+  /// \param Header A header name.
+  /// \return \p Header itself if there is no mapping for it; otherwise, return
+  /// a mapped header name.
+  llvm::StringRef getMappedHeader(llvm::StringRef Header) const;
+
+private:
+  /// A string-to-string map saving the mapping relationship.
+  HeaderMap HeaderMappingTable;
+
+  // A map from header patterns to header names.
+  // The header names are not owned. This is only threadsafe because the regexes
+  // never fail.
+  mutable std::vector<std::pair<llvm::Regex, const char *>>
+      RegexHeaderMappingTable;
+};
+
+} // namespace find_all_symbols
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_FIND_ALL_SYMBOLS_HEADER_MAP_COLLECTOR_H