[clang] [clang][ssaf] Add `StaticLibrary` data structure (PR #205946)

[Aviral Goel via cfe-commits]

================
@@ -0,0 +1,192 @@
+//===- StaticLibrary.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
+//
+//===----------------------------------------------------------------------===//
+
+#include "JSONFormatImpl.h"
+
+#include "clang/ScalableStaticAnalysis/Core/EntityLinker/StaticLibrary.h"
+#include "clang/ScalableStaticAnalysis/Core/EntityLinker/TUSummaryEncoding.h"
+#include "llvm/TargetParser/Triple.h"
+
+namespace clang::ssaf {
+
+//----------------------------------------------------------------------------
+// StaticLibrary
+//----------------------------------------------------------------------------
+
+llvm::Expected<StaticLibrary>
+JSONFormat::readStaticLibrary(llvm::StringRef Path) {
+  auto ExpectedJSON = readJSON(Path);
+  if (!ExpectedJSON) {
+    return ErrorBuilder::wrap(ExpectedJSON.takeError())
+        .context(ErrorMessages::ReadingFromFile, "StaticLibrary", Path)
+        .build();
+  }
+
+  Object *RootObjectPtr = ExpectedJSON->getAsObject();
+  if (!RootObjectPtr) {
+    return ErrorBuilder::create(std::errc::invalid_argument,
+                                ErrorMessages::FailedToReadObject,
+                                "StaticLibrary", "object")
+        .context(ErrorMessages::ReadingFromFile, "StaticLibrary", Path)
+        .build();
+  }
+
+  if (auto Err = checkSummaryType(*RootObjectPtr, JSONTypeValueStaticLibrary)) {
+    return ErrorBuilder::wrap(std::move(Err))
+        .context(ErrorMessages::ReadingFromFile, "StaticLibrary", Path)
+        .build();
+  }
+
+  auto ExpectedStaticLibrary = readStaticLibraryFromObject(*RootObjectPtr);
+  if (!ExpectedStaticLibrary) {
+    return ErrorBuilder::wrap(ExpectedStaticLibrary.takeError())
+        .context(ErrorMessages::ReadingFromFile, "StaticLibrary", Path)
+        .build();
+  }
+
+  return std::move(*ExpectedStaticLibrary);
+}
+
+llvm::Expected<StaticLibrary>
+JSONFormat::readStaticLibraryFromObject(const Object &RootObject) {
+  auto OptTargetTriple = RootObject.getString("target_triple");
----------------
aviralg wrote:

Good point. I will create a separate PR to address this since `target_triple` is being used in:
- Core/Serialization/JSONFormat/StaticLibrary.cpp
- Core/Serialization/JSONFormat/TUSummary.cpp
- Core/Serialization/JSONFormat/TUSummaryEncoding.cpp
- Core/Serialization/JSONFormat/LUSummary.cpp
- Core/Serialization/JSONFormat/LUSummaryEncoding.cpp

https://github.com/llvm/llvm-project/pull/205946