Program Listing for File key_value.hpp
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// Copyright 2017 Open Source Robotics Foundation, Inc.
//
// 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 RMW__IMPL__CPP__KEY_VALUE_HPP_
#define RMW__IMPL__CPP__KEY_VALUE_HPP_
#include <map>
#include <string>
#include <vector>
namespace rmw
{
namespace impl
{
namespace cpp
{
// TODO(karsten1987): Implement based on
// https://github.com/PrismTech/opensplice/blob/master/docs/pdf/OpenSplice_refman_CPP.pdf
static std::map<std::string, std::vector<uint8_t>>
parse_key_value(const std::vector<uint8_t> & kv)
{
std::map<std::string, std::vector<uint8_t>> m;
bool keyfound = false;
std::string key;
std::vector<uint8_t> value;
uint8_t prev = '\0';
if (kv.size() == 0) {
goto not_valid;
}
for (uint8_t u8 : kv) {
if (keyfound) {
if ((u8 == ';') && (prev != ';')) {
prev = u8;
continue;
} else if ((u8 != ';') && (prev == ';')) {
if (value.size() == 0) {
goto not_valid;
}
m[key] = value;
key.clear();
value.clear();
keyfound = false;
} else {
value.push_back(u8);
}
}
if (!keyfound) {
if (u8 == '=') {
if (key.size() == 0) {
goto not_valid;
}
keyfound = true;
} else if (isalnum(u8)) {
key.push_back(u8);
} else if ((u8 == '\0') && (key.size() == 0) && (m.size() > 0)) {
break; // accept trailing '\0' characters
} else if ((prev != ';') || (key.size() > 0)) {
goto not_valid;
}
}
prev = u8;
}
if (keyfound) {
if (value.size() == 0) {
goto not_valid;
}
m[key] = value;
} else if (key.size() > 0) {
goto not_valid;
}
return m;
not_valid:
// This is not a failure this is something that can happen because the participant_qos userData
// is used. Other participants in the system not created by rmw could use userData for something
// else.
return std::map<std::string, std::vector<uint8_t>>();
}
} // namespace cpp
} // namespace impl
} // namespace rmw
#endif // RMW__IMPL__CPP__KEY_VALUE_HPP_