Function WindowsEnvironmentVectorFromMap

cpp-subprocess/subprocess.hpp:490–510

env_vector_t WindowsEnvironmentVectorFromMap(const env_map_t &source_map) Creates a vector buffer for the new environment string table Copies in the mapped variables Returns the vector

  // * Copies in the mapped variables
  // * Returns the vector
  inline env_vector_t WindowsEnvironmentVectorFromMap(const env_map_t &source_map)
  {
	// Make a new environment map buffer.
	env_vector_t environment_map_buffer;
	// Give it some space.
	environment_map_buffer.reserve(4096);

	// And fill'er up.
	for(auto kv: source_map){
	  // Create the line
	  platform_str_t current_line(kv.first); current_line += L"="; current_line += kv.second;
	  // Add the line to the buffer.
	  std::copy(current_line.begin(), current_line.end(), std::back_inserter(environment_map_buffer));
	  // Append a null
	  environment_map_buffer.push_back(0);
	}
	// Append one last null because of how Windows does it's environment maps.
	environment_map_buffer.push_back(0);

	return environment_map_buffer;
  }

  // env_vector_t CreateUpdatedWindowsEnvironmentVector(const env_map_t &changes_map)
  // * Merges host environment with new mapped variables