kc3-lang/angle/src/libANGLE/serializer/JsonSerializer.cpp

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• Hash : b3a8033d
  Author :
  Date : 2021-03-31T09:34:00
  

  JsonSerializer: use stubs when building without rapidjson
  
  Bug: angleproject:5805
  Change-Id: Ibf51b8b75c3feb6efdef969effb3f50e2474c6b3
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2795772
  Commit-Queue: Gert Wollny <gert.wollny@collabora.com>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/serializer/JsonSerializer.cpp

• //
  // Copyright 2021 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // JsonSerializer.cpp: Implementation of a JSON based serializer
  // Note that for binary blob data only a checksum is stored so that
  // a lossless  deserialization is not supported.
  
  #include "JsonSerializer.h"
  
  #include "common/debug.h"
  
  #include <anglebase/sha1.h>
  #include <rapidjson/document.h>
  #include <rapidjson/filewritestream.h>
  #include <rapidjson/ostreamwrapper.h>
  #include <rapidjson/prettywriter.h>
  
  namespace angle
  {
  
  namespace js = rapidjson;
  
  JsonSerializer::JsonSerializer() : mDoc(js::kObjectType), mAllocator(mDoc.GetAllocator()) {}
  
  JsonSerializer::~JsonSerializer() {}
  
  void JsonSerializer::startDocument(const std::string &name)
  {
      startGroup(name);
  }
  
  void JsonSerializer::startGroup(const std::string &name)
  {
      auto group = std::make_unique<js::Value>(js::kObjectType);
      mGroupValueStack.push(std::move(group));
      mGroupNameStack.push(name);
  }
  
  void JsonSerializer::endGroup()
  {
      ValuePointer group = std::move(mGroupValueStack.top());
      std::string name   = std::move(mGroupNameStack.top());
      mGroupValueStack.pop();
      mGroupNameStack.pop();
      rapidjson::Value name_value(name.c_str(), mAllocator);
      mGroupValueStack.top()->AddMember(name_value, *group, mAllocator);
  }
  
  void JsonSerializer::addBlob(const std::string &name, const uint8_t *blob, size_t length)
  {
      rapidjson::Value tag(name.c_str(), mAllocator);
      unsigned char hash[angle::base::kSHA1Length];
      angle::base::SHA1HashBytes(blob, length, hash);
      std::ostringstream os;
  
      // Since we don't want to de-serialize the data we just store a checksume
      // of the blob
      os << "SHA1:";
      static constexpr char kASCII[] = "0123456789ABCDEF";
      for (size_t i = 0; i < angle::base::kSHA1Length; ++i)
      {
          os << kASCII[hash[i] & 0xf] << kASCII[hash[i] >> 4];
      }
      addString(name, os.str());
  }
  
  void JsonSerializer::addCString(const std::string &name, const char *value)
  {
      rapidjson::Value tag(name.c_str(), mAllocator);
      rapidjson::Value val(value, mAllocator);
      mGroupValueStack.top()->AddMember(tag, val, mAllocator);
  }
  
  void JsonSerializer::addString(const std::string &name, const std::string &value)
  {
      addCString(name, value.c_str());
  }
  
  const char *JsonSerializer::data() const
  {
      return mResult.c_str();
  }
  
  std::vector<uint8_t> JsonSerializer::getData() const
  {
      return std::vector<uint8_t>(mResult.begin(), mResult.end());
  }
  
  void JsonSerializer::endDocument()
  {
      // finalize last group
      ASSERT(!mGroupValueStack.empty());
      ASSERT(!mGroupNameStack.empty());
  
      rapidjson::Value name_value(mGroupNameStack.top().c_str(), mAllocator);
      mDoc.AddMember(name_value, *mGroupValueStack.top(), mAllocator);
  
      mGroupValueStack.pop();
      mGroupNameStack.pop();
      ASSERT(mGroupValueStack.empty());
      ASSERT(mGroupNameStack.empty());
  
      std::stringstream os;
      js::OStreamWrapper osw(os);
      js::PrettyWriter<js::OStreamWrapper> pretty_os(osw);
      mDoc.Accept(pretty_os);
      mResult = os.str();
  }
  
  size_t JsonSerializer::length() const
  {
      return mResult.length();
  }
  
  }  // namespace angle
  

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