[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
llvm-svn: 347823

1 files changed, 71 insertions, 0 deletions

diff --git a/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp b/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp
new file mode 100644
index 0000000..6e24cf5
--- /dev/null
+++ b/llvm/lib/TextAPI/MachO/ArchitectureSet.cpp
@@ -0,0 +1,71 @@
+//===- llvm/TextAPI/ArchitectureSet.cpp - Architecture Set ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Implements the architecture set.
+///
+//===----------------------------------------------------------------------===//
+
+#include "llvm/TextAPI/MachO/ArchitectureSet.h"
+
+namespace llvm {
+namespace MachO {
+
+ArchitectureSet::ArchitectureSet(const std::vector<Architecture> &Archs)
+    : ArchitectureSet() {
+  for (auto Arch : Archs) {
+    if (Arch == Architecture::unknown)
+      continue;
+    set(Arch);
+  }
+}
+
+size_t ArchitectureSet::count() const {
+  // popcnt
+  size_t Cnt = 0;
+  for (unsigned i = 0; i < sizeof(ArchSetType) * 8; ++i)
+    if (ArchSet & (1U << i))
+      ++Cnt;
+  return Cnt;
+}
+
+ArchitectureSet::operator std::string() const {
+  if (empty())
+    return "[(empty)]";
+
+  std::string result;
+  auto size = count();
+  for (auto arch : *this) {
+    result.append(getArchitectureName(arch));
+    size -= 1;
+    if (size)
+      result.append(" ");
+  }
+  return result;
+}
+
+ArchitectureSet::operator std::vector<Architecture>() const {
+  std::vector<Architecture> archs;
+  for (auto arch : *this) {
+    if (arch == Architecture::unknown)
+      continue;
+    archs.emplace_back(arch);
+  }
+  return archs;
+}
+
+void ArchitectureSet::print(raw_ostream &os) const { os << std::string(*this); }
+
+raw_ostream &operator<<(raw_ostream &os, ArchitectureSet set) {
+  set.print(os);
+  return os;
+}
+
+} // end namespace MachO.
+} // end namespace llvm.