1 #ifndef OSMIUM_IO_READER_HPP 2 #define OSMIUM_IO_READER_HPP 42 #include <system_error> 47 # include <sys/wait.h> 55 #include <osmium/io/detail/input_format.hpp> 56 #include <osmium/io/detail/read_thread.hpp> 57 #include <osmium/io/detail/read_write.hpp> 58 #include <osmium/io/detail/queue_util.hpp> 74 inline std::size_t get_input_queue_size() noexcept {
79 inline std::size_t get_osmdata_queue_size() noexcept {
98 detail::ParserFactory::create_parser_type
m_creator;
133 m_read_which_entities = value;
137 m_read_metadata = value;
142 const detail::ParserFactory::create_parser_type& creator,
143 detail::future_string_queue_type& input_queue,
144 detail::future_buffer_queue_type& osmdata_queue,
145 std::promise<osmium::io::Header>&& header_promise,
148 std::promise<osmium::io::Header> promise{std::move(header_promise)};
149 osmium::io::detail::parser_arguments args = {
157 creator(args)->parse();
172 static int execute(
const std::string& command,
const std::string& filename,
int* childpid) {
174 if (pipe(pipefd) < 0) {
175 throw std::system_error{errno, std::system_category(),
"opening pipe failed"};
177 const pid_t pid = fork();
179 throw std::system_error{errno, std::system_category(),
"fork failed"};
183 for (
int i = 0; i < 32; ++i) {
184 if (i != pipefd[1]) {
188 if (dup2(pipefd[1], 1) < 0) {
192 ::open(
"/dev/null", O_RDONLY);
193 ::open(
"/dev/null", O_WRONLY);
198 if (::execlp(command.c_str(), command.c_str(),
"-g", filename.c_str(),
nullptr) < 0) {
218 const std::string protocol{filename.substr(0, filename.find_first_of(
':'))};
219 if (protocol ==
"http" || protocol ==
"https" || protocol ==
"ftp" || protocol ==
"file") {
221 return execute(
"curl", filename, childpid);
223 throw io_error{
"Reading OSM files from the network currently not supported on Windows."};
226 return osmium::io::detail::open_for_reading(filename);
253 template <
typename... TArgs>
255 m_file(file.check()),
256 m_creator(
detail::ParserFactory::instance().get_creator_function(m_file)),
259 m_input_queue(
detail::get_input_queue_size(),
"raw_input"),
260 m_decompressor(m_file.buffer() ?
261 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), m_file.buffer(), m_file.buffer_size()) :
262 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), open_input_file_or_url(m_file.filename(), &m_childpid))),
263 m_read_thread_manager(*m_decompressor, m_input_queue),
264 m_osmdata_queue(
detail::get_osmdata_queue_size(),
"parser_results"),
265 m_osmdata_queue_wrapper(m_osmdata_queue),
269 m_file_size(m_decompressor->
file_size()) {
271 (void)std::initializer_list<int>{
272 (set_option(args), 0)...
279 std::promise<osmium::io::Header> header_promise;
280 m_header_future = header_promise.get_future();
281 m_thread =
osmium::thread::thread_handler{parser_thread, std::ref(*m_pool), std::ref(m_creator), std::ref(m_input_queue), std::ref(m_osmdata_queue), std::move(header_promise), m_read_which_entities, m_read_metadata};
284 template <
typename... TArgs>
285 explicit Reader(
const std::string& filename, TArgs&&... args) :
289 template <
typename... TArgs>
290 explicit Reader(
const char* filename, TArgs&&... args) :
317 m_status = status::closed;
319 m_read_thread_manager.stop();
321 m_osmdata_queue_wrapper.drain();
324 m_read_thread_manager.close();
332 const pid_t pid = ::waitpid(m_childpid, &status, 0);
333 #pragma GCC diagnostic push 334 #pragma GCC diagnostic ignored "-Wold-style-cast" 335 if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
336 throw std::system_error{errno, std::system_category(),
"subprocess returned error"};
338 #pragma GCC diagnostic pop 351 if (m_status == status::error) {
352 throw io_error{
"Can not get header from reader when in status 'error'"};
356 if (m_header_future.valid()) {
357 m_header = m_header_future.
get();
361 m_status = status::error;
379 if (m_status != status::okay) {
380 throw io_error{
"Can not read from reader when in status 'closed', 'eof', or 'error'"};
384 m_status = status::eof;
394 buffer = m_osmdata_queue_wrapper.pop();
395 if (detail::at_end_of_data(buffer)) {
396 m_status = status::eof;
397 m_read_thread_manager.close();
406 m_status = status::error;
416 return m_status == status::eof || m_status == status::closed;
442 return m_decompressor->offset();
455 template <
typename... TArgs>
459 Reader reader{std::forward<TArgs>(args)...};
460 while (
auto read_buffer = reader.read()) {
461 buffer.add_buffer(read_buffer);
472 #endif // OSMIUM_IO_READER_HPP detail::queue_wrapper< osmium::memory::Buffer > m_osmdata_queue_wrapper
Definition: reader.hpp:116
status
Definition: reader.hpp:100
osmium::memory::Buffer read()
Definition: reader.hpp:376
Reader(const osmium::io::File &file, TArgs &&... args)
Definition: reader.hpp:254
type
Definition: entity_bits.hpp:63
std::size_t get_max_queue_size(const char *queue_name, std::size_t default_value) noexcept
Definition: config.hpp:71
std::size_t file_size(int fd)
Definition: file.hpp:109
std::size_t file_size() const noexcept
Definition: reader.hpp:423
bool eof() const
Definition: reader.hpp:415
int m_childpid
Definition: reader.hpp:107
static Pool & default_instance()
Definition: pool.hpp:169
Reader(const char *filename, TArgs &&... args)
Definition: reader.hpp:290
std::future< osmium::io::Header > m_header_future
Definition: reader.hpp:118
Definition: reader_iterator.hpp:39
std::unique_ptr< osmium::io::Decompressor > m_decompressor
Definition: reader.hpp:111
std::size_t committed() const noexcept
Definition: buffer.hpp:268
object or changeset
Definition: entity_bits.hpp:76
detail::future_string_queue_type m_input_queue
Definition: reader.hpp:109
osmium::memory::Buffer read_file(TArgs &&... args)
Definition: reader.hpp:456
osmium::io::File m_file
Definition: reader.hpp:94
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
void set_option(osmium::osm_entity_bits::type value) noexcept
Definition: reader.hpp:132
std::size_t m_file_size
Definition: reader.hpp:123
osmium::io::detail::ReadThreadManager m_read_thread_manager
Definition: reader.hpp:113
static int execute(const std::string &command, const std::string &filename, int *childpid)
Definition: reader.hpp:172
static void parser_thread(osmium::thread::Pool &pool, const detail::ParserFactory::create_parser_type &creator, detail::future_string_queue_type &input_queue, detail::future_buffer_queue_type &osmdata_queue, std::promise< osmium::io::Header > &&header_promise, osmium::osm_entity_bits::type read_which_entities, osmium::io::read_meta read_metadata)
Definition: reader.hpp:141
Reader(const std::string &filename, TArgs &&... args)
Definition: reader.hpp:285
Definition: reader.hpp:92
~Reader() noexcept
Definition: reader.hpp:300
std::size_t offset() const noexcept
Definition: reader.hpp:441
osmium::io::Header header()
Definition: reader.hpp:350
void set_option(osmium::io::read_meta value) noexcept
Definition: reader.hpp:136
void set_option(osmium::thread::Pool &pool) noexcept
Definition: reader.hpp:128
Definition: buffer.hpp:98
osmium::thread::thread_handler m_thread
Definition: reader.hpp:121
static int open_input_file_or_url(const std::string &filename, int *childpid)
Definition: reader.hpp:217
detail::future_buffer_queue_type m_osmdata_queue
Definition: reader.hpp:115
osmium::io::Header m_header
Definition: reader.hpp:119
read_meta
Definition: file_format.hpp:53
Definition: entity_bits.hpp:67
Definition: compression.hpp:135
std::string get(const std::string &key, const std::string &default_value="") const noexcept
Definition: options.hpp:124
detail::ParserFactory::create_parser_type m_creator
Definition: reader.hpp:98
void close()
Definition: reader.hpp:316