[TextAPI] TBD Reader/Writer

Add basic infrastructure for reading and writting TBD files (version 1 - 3).

The TextAPI library is not used by anything yet (besides the unit tests). Tool
support will be added in a separate commit.

The TBD format is currently documented in the implementation file (TextStub.cpp).

https://reviews.llvm.org/D53945

Update: This contains changes to fix issues discovered by the bots:
 - add parentheses to silence warnings.
 - rename variables
 - use PlatformType from BinaryFormat
 - Trying if switching from a vector to an array will appeas the bots.
 - Replace the tuple with a struct to work around an explicit constructor bug.
 - This fixes an issue where we were leaking the YAML document if there was a
   parsing error.

Updated the license information in all files.

llvm-svn: 356820

1 files changed, 84 insertions, 0 deletions

diff --git a/llvm/lib/TextAPI/MachO/InterfaceFile.cpp b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
new file mode 100644
index 00000000000..323f1b61fcd
--- /dev/null
+++ b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
@@ -0,0 +1,84 @@
+//===- InterfaceFile.cpp --------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the Interface File.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/TextAPI/MachO/InterfaceFile.h"
+#include <iomanip>
+#include <sstream>
+
+using namespace llvm::MachO;
+
+namespace llvm {
+namespace MachO {
+namespace detail {
+template <typename C>
+typename C::iterator addEntry(C &Container, StringRef InstallName) {
+  auto I =
+      std::lower_bound(std::begin(Container), std::end(Container), InstallName,
+                       [](const InterfaceFileRef &LHS, const StringRef &RHS) {
+                         return LHS.getInstallName() < RHS;
+                       });
+  if ((I != std::end(Container)) && !(InstallName < I->getInstallName()))
+    return I;
+
+  return Container.emplace(I, InstallName);
+}
+} // end namespace detail.
+
+void InterfaceFile::addAllowableClient(StringRef Name,
+                                       ArchitectureSet Architectures) {
+  auto Client = detail::addEntry(AllowableClients, Name);
+  Client->addArchitectures(Architectures);
+}
+
+void InterfaceFile::addReexportedLibrary(StringRef InstallName,
+                                         ArchitectureSet Architectures) {
+  auto Lib = detail::addEntry(ReexportedLibraries, InstallName);
+  Lib->addArchitectures(Architectures);
+}
+
+void InterfaceFile::addUUID(Architecture Arch, StringRef UUID) {
+  auto I = std::lower_bound(UUIDs.begin(), UUIDs.end(), Arch,
+                            [](const std::pair<Architecture, std::string> &LHS,
+                               Architecture RHS) { return LHS.first < RHS; });
+
+  if ((I != UUIDs.end()) && !(Arch < I->first)) {
+    I->second = UUID;
+    return;
+  }
+
+  UUIDs.emplace(I, Arch, UUID);
+  return;
+}
+
+void InterfaceFile::addUUID(Architecture Arch, uint8_t UUID[16]) {
+  std::stringstream Stream;
+  for (unsigned i = 0; i < 16; ++i) {
+    if (i == 4 || i == 6 || i == 8 || i == 10)
+      Stream << '-';
+    Stream << std::setfill('0') << std::setw(2) << std::uppercase << std::hex
+           << static_cast<int>(UUID[i]);
+  }
+  addUUID(Arch, Stream.str());
+}
+
+void InterfaceFile::addSymbol(SymbolKind Kind, StringRef Name,
+                              ArchitectureSet Archs, SymbolFlags Flags) {
+  Name = copyString(Name);
+  auto result = Symbols.try_emplace(SymbolsMapKey{Kind, Name}, nullptr);
+  if (result.second)
+    result.first->second = new (Allocator) Symbol{Kind, Name, Archs, Flags};
+  else
+    result.first->second->addArchitectures(Archs);
+}
+
+} // end namespace MachO.
+} // end namespace llvm.