[clang-tdiy] Add header file extension configuration support.

Summary: * Add a `HeaderFileExtensions` check option in misc-definitions-in-headers, google-build-namespaces and google-global-names-in-headers.

Reviewers: aaron.ballman, alexfh

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D16113

llvm-svn: 259879

1 files changed, 51 insertions, 0 deletions

diff --git a/clang-tools-extra/clang-tidy/utils/HeaderFileExtensionsUtils.h b/clang-tools-extra/clang-tidy/utils/HeaderFileExtensionsUtils.h
new file mode 100644
index 00000000000..4b0f3b552b6
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/utils/HeaderFileExtensionsUtils.h
@@ -0,0 +1,51 @@
+//===--- HeaderFileExtensionsUtils.h - clang-tidy----------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_FILE_EXTENSIONS_UTILS_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_FILE_EXTENSIONS_UTILS_H
+
+#include <string>
+
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/Support/Path.h"
+
+namespace clang {
+namespace tidy {
+namespace utils {
+
+typedef llvm::SmallSet<llvm::StringRef, 5> HeaderFileExtensionsSet;
+
+/// \brief Checks whether expansion location of Loc is in header file.
+bool isExpansionLocInHeaderFile(
+    SourceLocation Loc, const SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions);
+
+/// \brief Checks whether presumed location of Loc is in header file.
+bool isPresumedLocInHeaderFile(
+    SourceLocation Loc, SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions);
+
+/// \brief Checks whether spelling location of Loc is in header file.
+bool isSpellingLocInHeaderFile(
+    SourceLocation Loc, SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions);
+
+/// \brief Parses header file extensions from a semicolon-separated list.
+bool parseHeaderFileExtensions(StringRef AllHeaderFileExtensions,
+                               HeaderFileExtensionsSet &HeaderFileExtensions,
+                               char delimiter);
+
+} // namespace utils
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_FILE_EXTENSIONS_UTILS_H