Program Listing for File local_message_definition_source.hpp
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// Copyright 2022, Foxglove Technologies. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ROSBAG2_CPP__MESSAGE_DEFINITIONS__LOCAL_MESSAGE_DEFINITION_SOURCE_HPP_
#define ROSBAG2_CPP__MESSAGE_DEFINITIONS__LOCAL_MESSAGE_DEFINITION_SOURCE_HPP_
#ifndef ROSBAG2_CPP_LOCAL_MESSAGE_DEFINITION_SOURCE_MAX_RECURSION_DEPTH
#define ROSBAG2_CPP_LOCAL_MESSAGE_DEFINITION_SOURCE_MAX_RECURSION_DEPTH 50
#endif
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include "rosbag2_cpp/visibility_control.hpp"
#include "rosbag2_storage/message_definition.hpp"
// This is necessary because of using stl types here. It is completely safe, because
// a) the member is not accessible from the outside
// b) there are no inline functions.
#ifdef _WIN32
# pragma warning(push)
# pragma warning(disable:4251)
#endif
namespace rosbag2_cpp
{
class DefinitionNotFoundError : public std::exception
{
private:
std::string name_;
public:
explicit DefinitionNotFoundError(std::string name)
: name_(std::move(name))
{
}
const char * what() const noexcept override
{
return name_.c_str();
}
};
class ROSBAG2_CPP_PUBLIC LocalMessageDefinitionSource final
{
public:
rosbag2_storage::MessageDefinition get_full_text(const std::string & root_type);
enum struct Format
{
UNKNOWN = 0,
MSG = 1,
IDL = 2,
SRV = 3,
};
explicit LocalMessageDefinitionSource() = default;
LocalMessageDefinitionSource(const LocalMessageDefinitionSource &) = delete;
LocalMessageDefinitionSource(const LocalMessageDefinitionSource &&) = delete;
private:
struct MessageSpec
{
MessageSpec(Format format, std::string text, const std::string & package_context);
const std::set<std::string> dependencies;
const std::string text;
Format format{Format::UNKNOWN};
};
struct DefinitionIdentifier
{
DefinitionIdentifier() = delete;
DefinitionIdentifier(const std::string & topic_type, Format format)
: topic_type_(topic_type)
, format_(format)
{
size_t h1 = std::hash<Format>()(format_);
size_t h2 = std::hash<std::string>()(topic_type_);
hash_ = h1 ^ h2;
}
bool operator==(const DefinitionIdentifier & di) const
{
return (format_ == di.format_) && (topic_type_ == di.topic_type_);
}
size_t hash() const
{
return hash_;
}
Format format() const
{
return format_;
}
std::string topic_type() const
{
return topic_type_;
}
private:
std::string topic_type_;
Format format_;
size_t hash_;
};
struct DefinitionIdentifierHash
{
size_t operator()(const DefinitionIdentifier & di) const
{
return di.hash();
}
};
const MessageSpec & load_message_spec(const DefinitionIdentifier & definition_identifier);
static std::string delimiter(const DefinitionIdentifier & definition_identifier);
std::unordered_map<DefinitionIdentifier,
MessageSpec, DefinitionIdentifierHash> msg_specs_by_definition_identifier_;
};
ROSBAG2_CPP_PUBLIC
std::set<std::string> parse_definition_dependencies(
LocalMessageDefinitionSource::Format format,
const std::string & text,
const std::string & package_context);
} // namespace rosbag2_cpp
#ifdef _WIN32
# pragma warning(pop)
#endif
#endif // ROSBAG2_CPP__MESSAGE_DEFINITIONS__LOCAL_MESSAGE_DEFINITION_SOURCE_HPP_