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//===-- StructuredData.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 "lldb/Utility/StructuredData.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Status.h"
#include "llvm/Support/MemoryBuffer.h"
#include <cerrno>
#include <cinttypes>
#include <cstdlib>
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(const 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;
}
llvm::Expected<json::Value> value =
json::parse(buffer_or_error.get()->getBuffer().str());
if (value)
return ParseJSONValue(*value);
error.SetErrorString(toString(value.takeError()));
return StructuredData::ObjectSP();
}
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);
if (auto s = value.getAsString())
return std::make_shared<StructuredData::String>(*s);
if (auto b = value.getAsBoolean())
return std::make_shared<StructuredData::Boolean>(*b);
if (auto i = value.getAsInteger())
return std::make_shared<StructuredData::Integer>(*i);
if (auto d = value.getAsNumber())
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 std::move(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 std::move(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.GetStringRef());
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));
}
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