1 files changed, 88 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/InstallAPI/HeaderFile.cpp b/contrib/llvm-project/clang/lib/InstallAPI/HeaderFile.cpp
new file mode 100644
index 000000000000..0b7041ec8147
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/InstallAPI/HeaderFile.cpp
@@ -0,0 +1,88 @@
+//===- HeaderFile.cpp ------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/InstallAPI/HeaderFile.h"
+#include "llvm/TextAPI/Utils.h"
+
+using namespace llvm;
+namespace clang::installapi {
+
+llvm::Regex HeaderFile::getFrameworkIncludeRule() {
+  return llvm::Regex("/(.+)\\.framework/(.+)?Headers/(.+)");
+}
+
+std::optional<std::string> createIncludeHeaderName(const StringRef FullPath) {
+  // Headers in usr(/local)*/include.
+  std::string Pattern = "/include/";
+  auto PathPrefix = FullPath.find(Pattern);
+  if (PathPrefix != StringRef::npos) {
+    PathPrefix += Pattern.size();
+    return FullPath.drop_front(PathPrefix).str();
+  }
+
+  // Framework Headers.
+  SmallVector<StringRef, 4> Matches;
+  HeaderFile::getFrameworkIncludeRule().match(FullPath, &Matches);
+  // Returned matches are always in stable order.
+  if (Matches.size() != 4)
+    return std::nullopt;
+
+  return Matches[1].drop_front(Matches[1].rfind('/') + 1).str() + "/" +
+         Matches[3].str();
+}
+
+bool isHeaderFile(StringRef Path) {
+  return StringSwitch<bool>(sys::path::extension(Path))
+      .Cases(".h", ".H", ".hh", ".hpp", ".hxx", true)
+      .Default(false);
+}
+
+llvm::Expected<PathSeq> enumerateFiles(FileManager &FM, StringRef Directory) {
+  PathSeq Files;
+  std::error_code EC;
+  auto &FS = FM.getVirtualFileSystem();
+  for (llvm::vfs::recursive_directory_iterator i(FS, Directory, EC), ie;
+       i != ie; i.increment(EC)) {
+    if (EC)
+      return errorCodeToError(EC);
+
+    // Skip files that do not exist. This usually happens for broken symlinks.
+    if (FS.status(i->path()) == std::errc::no_such_file_or_directory)
+      continue;
+
+    StringRef Path = i->path();
+    if (isHeaderFile(Path))
+      Files.emplace_back(Path);
+  }
+
+  return Files;
+}
+
+HeaderGlob::HeaderGlob(StringRef GlobString, Regex &&Rule, HeaderType Type)
+    : GlobString(GlobString), Rule(std::move(Rule)), Type(Type) {}
+
+bool HeaderGlob::match(const HeaderFile &Header) {
+  if (Header.getType() != Type)
+    return false;
+
+  bool Match = Rule.match(Header.getPath());
+  if (Match)
+    FoundMatch = true;
+  return Match;
+}
+
+Expected<std::unique_ptr<HeaderGlob>> HeaderGlob::create(StringRef GlobString,
+                                                         HeaderType Type) {
+  auto Rule = MachO::createRegexFromGlob(GlobString);
+  if (!Rule)
+    return Rule.takeError();
+
+  return std::make_unique<HeaderGlob>(GlobString, std::move(*Rule), Type);
+}
+
+} // namespace clang::installapi