forked from OSchip/llvm-project
287 lines
8.1 KiB
C++
287 lines
8.1 KiB
C++
//===---------------------StructuredData.cpp ---------------------*- C++-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/StructuredData.h"
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#include "lldb/Utility/DataBuffer.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/JSON.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/Stream.h" // for Stream
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#include "lldb/Utility/StreamString.h"
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#include "llvm/ADT/STLExtras.h" // for make_unique
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#include <cerrno>
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#include <cstdlib>
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#include <inttypes.h>
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#include <limits> // for numeric_limits
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using namespace lldb_private;
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//----------------------------------------------------------------------
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// Functions that use a JSONParser to parse JSON into StructuredData
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//----------------------------------------------------------------------
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static StructuredData::ObjectSP ParseJSONValue(JSONParser &json_parser);
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static StructuredData::ObjectSP ParseJSONObject(JSONParser &json_parser);
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static StructuredData::ObjectSP ParseJSONArray(JSONParser &json_parser);
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StructuredData::ObjectSP
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StructuredData::ParseJSONFromFile(const FileSpec &input_spec, Status &error) {
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StructuredData::ObjectSP return_sp;
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if (!input_spec.Exists()) {
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error.SetErrorStringWithFormatv("input file {0} does not exist.",
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input_spec);
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return return_sp;
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}
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auto buffer_or_error = llvm::MemoryBuffer::getFile(input_spec.GetPath());
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if (!buffer_or_error) {
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error.SetErrorStringWithFormatv("could not open input file: {0} - {1}.",
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input_spec.GetPath(),
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buffer_or_error.getError().message());
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return return_sp;
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}
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JSONParser json_parser(buffer_or_error.get()->getBuffer());
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return_sp = ParseJSONValue(json_parser);
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return return_sp;
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}
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static StructuredData::ObjectSP ParseJSONObject(JSONParser &json_parser) {
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// The "JSONParser::Token::ObjectStart" token should have already been
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// consumed by the time this function is called
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auto dict_up = llvm::make_unique<StructuredData::Dictionary>();
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std::string value;
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std::string key;
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while (1) {
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JSONParser::Token token = json_parser.GetToken(value);
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if (token == JSONParser::Token::String) {
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key.swap(value);
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token = json_parser.GetToken(value);
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if (token == JSONParser::Token::Colon) {
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StructuredData::ObjectSP value_sp = ParseJSONValue(json_parser);
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if (value_sp)
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dict_up->AddItem(key, value_sp);
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else
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break;
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}
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} else if (token == JSONParser::Token::ObjectEnd) {
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return StructuredData::ObjectSP(dict_up.release());
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} else if (token == JSONParser::Token::Comma) {
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continue;
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} else {
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break;
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}
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}
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return StructuredData::ObjectSP();
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}
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static StructuredData::ObjectSP ParseJSONArray(JSONParser &json_parser) {
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// The "JSONParser::Token::ObjectStart" token should have already been
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// consumed
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// by the time this function is called
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auto array_up = llvm::make_unique<StructuredData::Array>();
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std::string value;
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std::string key;
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while (1) {
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StructuredData::ObjectSP value_sp = ParseJSONValue(json_parser);
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if (value_sp)
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array_up->AddItem(value_sp);
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else
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break;
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JSONParser::Token token = json_parser.GetToken(value);
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if (token == JSONParser::Token::Comma) {
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continue;
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} else if (token == JSONParser::Token::ArrayEnd) {
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return StructuredData::ObjectSP(array_up.release());
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} else {
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break;
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}
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}
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return StructuredData::ObjectSP();
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}
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static StructuredData::ObjectSP ParseJSONValue(JSONParser &json_parser) {
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std::string value;
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const JSONParser::Token token = json_parser.GetToken(value);
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switch (token) {
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case JSONParser::Token::ObjectStart:
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return ParseJSONObject(json_parser);
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case JSONParser::Token::ArrayStart:
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return ParseJSONArray(json_parser);
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case JSONParser::Token::Integer: {
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uint64_t uval;
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if (llvm::to_integer(value, uval, 0))
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return std::make_shared<StructuredData::Integer>(uval);
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} break;
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case JSONParser::Token::Float: {
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double val;
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if (llvm::to_float(value, val))
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return std::make_shared<StructuredData::Float>(val);
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} break;
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case JSONParser::Token::String:
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return std::make_shared<StructuredData::String>(value);
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case JSONParser::Token::True:
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case JSONParser::Token::False:
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return std::make_shared<StructuredData::Boolean>(token ==
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JSONParser::Token::True);
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case JSONParser::Token::Null:
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return std::make_shared<StructuredData::Null>();
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default:
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break;
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}
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return StructuredData::ObjectSP();
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}
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StructuredData::ObjectSP StructuredData::ParseJSON(std::string json_text) {
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JSONParser json_parser(json_text.c_str());
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StructuredData::ObjectSP object_sp = ParseJSONValue(json_parser);
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return object_sp;
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}
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StructuredData::ObjectSP
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StructuredData::Object::GetObjectForDotSeparatedPath(llvm::StringRef path) {
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if (this->GetType() == lldb::eStructuredDataTypeDictionary) {
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std::pair<llvm::StringRef, llvm::StringRef> match = path.split('.');
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std::string key = match.first.str();
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ObjectSP value = this->GetAsDictionary()->GetValueForKey(key);
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if (value.get()) {
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// Do we have additional words to descend? If not, return the
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// value we're at right now.
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if (match.second.empty()) {
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return value;
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} else {
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return value->GetObjectForDotSeparatedPath(match.second);
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}
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}
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return ObjectSP();
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}
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if (this->GetType() == lldb::eStructuredDataTypeArray) {
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std::pair<llvm::StringRef, llvm::StringRef> match = path.split('[');
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if (match.second.size() == 0) {
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return this->shared_from_this();
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}
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errno = 0;
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uint64_t val = strtoul(match.second.str().c_str(), NULL, 10);
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if (errno == 0) {
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return this->GetAsArray()->GetItemAtIndex(val);
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}
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return ObjectSP();
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}
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return this->shared_from_this();
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}
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void StructuredData::Object::DumpToStdout(bool pretty_print) const {
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StreamString stream;
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Dump(stream, pretty_print);
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llvm::outs() << stream.GetString();
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}
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void StructuredData::Array::Dump(Stream &s, bool pretty_print) const {
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bool first = true;
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s << "[";
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if (pretty_print) {
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s << "\n";
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s.IndentMore();
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}
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for (const auto &item_sp : m_items) {
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if (first) {
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first = false;
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} else {
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s << ",";
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if (pretty_print)
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s << "\n";
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}
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if (pretty_print)
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s.Indent();
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item_sp->Dump(s, pretty_print);
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}
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if (pretty_print) {
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s.IndentLess();
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s.EOL();
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s.Indent();
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}
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s << "]";
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}
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void StructuredData::Integer::Dump(Stream &s, bool pretty_print) const {
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s.Printf("%" PRIu64, m_value);
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}
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void StructuredData::Float::Dump(Stream &s, bool pretty_print) const {
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s.Printf("%lg", m_value);
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}
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void StructuredData::Boolean::Dump(Stream &s, bool pretty_print) const {
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if (m_value == true)
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s.PutCString("true");
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else
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s.PutCString("false");
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}
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void StructuredData::String::Dump(Stream &s, bool pretty_print) const {
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std::string quoted;
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const size_t strsize = m_value.size();
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for (size_t i = 0; i < strsize; ++i) {
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char ch = m_value[i];
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if (ch == '"' || ch == '\\')
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quoted.push_back('\\');
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quoted.push_back(ch);
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}
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s.Printf("\"%s\"", quoted.c_str());
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}
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void StructuredData::Dictionary::Dump(Stream &s, bool pretty_print) const {
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bool first = true;
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s << "{";
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if (pretty_print) {
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s << "\n";
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s.IndentMore();
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}
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for (const auto &pair : m_dict) {
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if (first)
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first = false;
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else {
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s << ",";
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if (pretty_print)
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s << "\n";
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}
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if (pretty_print)
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s.Indent();
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s << "\"" << pair.first.AsCString() << "\" : ";
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pair.second->Dump(s, pretty_print);
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}
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if (pretty_print) {
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s.IndentLess();
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s.EOL();
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s.Indent();
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}
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s << "}";
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}
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void StructuredData::Null::Dump(Stream &s, bool pretty_print) const {
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s << "null";
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}
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void StructuredData::Generic::Dump(Stream &s, bool pretty_print) const {
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s << "0x" << m_object;
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}
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