Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/clang-tidy/utils/HeaderFileExtensionsUtils.cpp

@@ -0,0 +1,71 @@
+//===--- HeaderFileExtensionsUtils.cpp - clang-tidy--------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "HeaderFileExtensionsUtils.h"
+#include "clang/Basic/CharInfo.h"
+#include "llvm/Support/Path.h"
+
+namespace clang {
+namespace tidy {
+namespace utils {
+
+bool isExpansionLocInHeaderFile(
+    SourceLocation Loc, const SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions) {
+  SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc);
+  return isHeaderFileExtension(SM.getFilename(ExpansionLoc),
+                               HeaderFileExtensions);
+}
+
+bool isPresumedLocInHeaderFile(
+    SourceLocation Loc, SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions) {
+  PresumedLoc PresumedLocation = SM.getPresumedLoc(Loc);
+  return isHeaderFileExtension(PresumedLocation.getFilename(),
+                               HeaderFileExtensions);
+}
+
+bool isSpellingLocInHeaderFile(
+    SourceLocation Loc, SourceManager &SM,
+    const HeaderFileExtensionsSet &HeaderFileExtensions) {
+  SourceLocation SpellingLoc = SM.getSpellingLoc(Loc);
+  return isHeaderFileExtension(SM.getFilename(SpellingLoc),
+                               HeaderFileExtensions);
+}
+
+bool parseHeaderFileExtensions(StringRef AllHeaderFileExtensions,
+                               HeaderFileExtensionsSet &HeaderFileExtensions,
+                               char delimiter) {
+  SmallVector<StringRef, 5> Suffixes;
+  AllHeaderFileExtensions.split(Suffixes, delimiter);
+  HeaderFileExtensions.clear();
+  for (StringRef Suffix : Suffixes) {
+    StringRef Extension = Suffix.trim();
+    for (StringRef::const_iterator it = Extension.begin();
+         it != Extension.end(); ++it) {
+      if (!isAlphanumeric(*it))
+        return false;
+    }
+    HeaderFileExtensions.insert(Extension);
+  }
+  return true;
+}
+
+bool isHeaderFileExtension(
+    StringRef FileName, const HeaderFileExtensionsSet &HeaderFileExtensions) {
+  StringRef extension = llvm::sys::path::extension(FileName);
+  if (extension.empty())
+    return false;
+  // Skip "." prefix.
+  return HeaderFileExtensions.count(extension.substr(1)) > 0;
+}
+
+} // namespace utils
+} // namespace tidy
+} // namespace clang