1 files changed, 176 insertions, 0 deletions
diff --git a/lldb/source/Utility/StructuredData.cpp b/lldb/source/Utility/StructuredData.cpp
new file mode 100644
index 000000000000..783a08082174
--- /dev/null
+++ b/lldb/source/Utility/StructuredData.cpp
@@ -0,0 +1,176 @@
+//===---------------------StructuredData.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 "lldb/Utility/StructuredData.h"
+#include "lldb/Utility/DataBuffer.h"
+#include "lldb/Utility/FileSpec.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StreamString.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <cerrno>
+#include <cstdlib>
+#include <inttypes.h>
+#include <limits>
+
+using namespace lldb_private;
+using namespace llvm;
+
+static StructuredData::ObjectSP ParseJSONValue(json::Value &value);
+static StructuredData::ObjectSP ParseJSONObject(json::Object *object);
+static StructuredData::ObjectSP ParseJSONArray(json::Array *array);
+
+StructuredData::ObjectSP StructuredData::ParseJSON(std::string json_text) {
+  llvm::Expected<json::Value> value = json::parse(json_text);
+  if (!value) {
+    llvm::consumeError(value.takeError());
+    return nullptr;
+  }
+  return ParseJSONValue(*value);
+}
+
+StructuredData::ObjectSP
+StructuredData::ParseJSONFromFile(const FileSpec &input_spec, Status &error) {
+  StructuredData::ObjectSP return_sp;
+
+  auto buffer_or_error = llvm::MemoryBuffer::getFile(input_spec.GetPath());
+  if (!buffer_or_error) {
+    error.SetErrorStringWithFormatv("could not open input file: {0} - {1}.",
+                                    input_spec.GetPath(),
+                                    buffer_or_error.getError().message());
+    return return_sp;
+  }
+  return ParseJSON(buffer_or_error.get()->getBuffer().str());
+}
+
+static StructuredData::ObjectSP ParseJSONValue(json::Value &value) {
+  if (json::Object *O = value.getAsObject())
+    return ParseJSONObject(O);
+
+  if (json::Array *A = value.getAsArray())
+    return ParseJSONArray(A);
+
+  std::string s;
+  if (json::fromJSON(value, s))
+    return std::make_shared<StructuredData::String>(s);
+
+  bool b;
+  if (json::fromJSON(value, b))
+    return std::make_shared<StructuredData::Boolean>(b);
+
+  int64_t i;
+  if (json::fromJSON(value, i))
+    return std::make_shared<StructuredData::Integer>(i);
+
+  double d;
+  if (json::fromJSON(value, d))
+    return std::make_shared<StructuredData::Float>(d);
+
+  return StructuredData::ObjectSP();
+}
+
+static StructuredData::ObjectSP ParseJSONObject(json::Object *object) {
+  auto dict_up = std::make_unique<StructuredData::Dictionary>();
+  for (auto &KV : *object) {
+    StringRef key = KV.first;
+    json::Value value = KV.second;
+    if (StructuredData::ObjectSP value_sp = ParseJSONValue(value))
+      dict_up->AddItem(key, value_sp);
+  }
+  return dict_up;
+}
+
+static StructuredData::ObjectSP ParseJSONArray(json::Array *array) {
+  auto array_up = std::make_unique<StructuredData::Array>();
+  for (json::Value &value : *array) {
+    if (StructuredData::ObjectSP value_sp = ParseJSONValue(value))
+      array_up->AddItem(value_sp);
+  }
+  return array_up;
+}
+
+StructuredData::ObjectSP
+StructuredData::Object::GetObjectForDotSeparatedPath(llvm::StringRef path) {
+  if (this->GetType() == lldb::eStructuredDataTypeDictionary) {
+    std::pair<llvm::StringRef, llvm::StringRef> match = path.split('.');
+    std::string key = match.first.str();
+    ObjectSP value = this->GetAsDictionary()->GetValueForKey(key);
+    if (value.get()) {
+      // Do we have additional words to descend?  If not, return the value
+      // we're at right now.
+      if (match.second.empty()) {
+        return value;
+      } else {
+        return value->GetObjectForDotSeparatedPath(match.second);
+      }
+    }
+    return ObjectSP();
+  }
+
+  if (this->GetType() == lldb::eStructuredDataTypeArray) {
+    std::pair<llvm::StringRef, llvm::StringRef> match = path.split('[');
+    if (match.second.empty()) {
+      return this->shared_from_this();
+    }
+    errno = 0;
+    uint64_t val = strtoul(match.second.str().c_str(), nullptr, 10);
+    if (errno == 0) {
+      return this->GetAsArray()->GetItemAtIndex(val);
+    }
+    return ObjectSP();
+  }
+
+  return this->shared_from_this();
+}
+
+void StructuredData::Object::DumpToStdout(bool pretty_print) const {
+  json::OStream stream(llvm::outs(), pretty_print ? 2 : 0);
+  Serialize(stream);
+}
+
+void StructuredData::Array::Serialize(json::OStream &s) const {
+  s.arrayBegin();
+  for (const auto &item_sp : m_items) {
+    item_sp->Serialize(s);
+  }
+  s.arrayEnd();
+}
+
+void StructuredData::Integer::Serialize(json::OStream &s) const {
+  s.value(static_cast<int64_t>(m_value));
+}
+
+void StructuredData::Float::Serialize(json::OStream &s) const {
+  s.value(m_value);
+}
+
+void StructuredData::Boolean::Serialize(json::OStream &s) const {
+  s.value(m_value);
+}
+
+void StructuredData::String::Serialize(json::OStream &s) const {
+  s.value(m_value);
+}
+
+void StructuredData::Dictionary::Serialize(json::OStream &s) const {
+  s.objectBegin();
+  for (const auto &pair : m_dict) {
+    s.attributeBegin(pair.first.AsCString());
+    pair.second->Serialize(s);
+    s.attributeEnd();
+  }
+  s.objectEnd();
+}
+
+void StructuredData::Null::Serialize(json::OStream &s) const {
+  s.value(nullptr);
+}
+
+void StructuredData::Generic::Serialize(json::OStream &s) const {
+  s.value(llvm::formatv("{0:X}", m_object));
+}