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> 73 inline size_t get_input_queue_size() noexcept {
78 inline size_t get_osmdata_queue_size() noexcept {
95 detail::ParserFactory::create_parser_type
m_creator;
126 m_read_which_entities = value;
130 m_read_metadata = value;
134 static void parser_thread(
const detail::ParserFactory::create_parser_type& creator,
135 detail::future_string_queue_type& input_queue,
136 detail::future_buffer_queue_type& osmdata_queue,
137 std::promise<osmium::io::Header>&& header_promise,
140 std::promise<osmium::io::Header> promise = std::move(header_promise);
141 osmium::io::detail::parser_arguments args = {
148 creator(args)->parse();
163 static int execute(
const std::string& command,
const std::string& filename,
int* childpid) {
165 if (pipe(pipefd) < 0) {
166 throw std::system_error{errno, std::system_category(),
"opening pipe failed"};
168 const pid_t pid = fork();
170 throw std::system_error{errno, std::system_category(),
"fork failed"};
174 for (
int i = 0; i < 32; ++i) {
175 if (i != pipefd[1]) {
179 if (dup2(pipefd[1], 1) < 0) {
183 ::open(
"/dev/null", O_RDONLY);
184 ::open(
"/dev/null", O_WRONLY);
189 if (::execlp(command.c_str(), command.c_str(),
"-g", filename.c_str(),
nullptr) < 0) {
209 std::string protocol = filename.substr(0, filename.find_first_of(
':'));
210 if (protocol ==
"http" || protocol ==
"https" || protocol ==
"ftp" || protocol ==
"file") {
212 return execute(
"curl", filename, childpid);
214 throw io_error{
"Reading OSM files from the network currently not supported on Windows."};
217 return osmium::io::detail::open_for_reading(filename);
245 template <
typename... TArgs>
247 m_file(file.check()),
248 m_creator(
detail::ParserFactory::instance().get_creator_function(m_file)),
251 m_input_queue(
detail::get_input_queue_size(),
"raw_input"),
252 m_decompressor(m_file.buffer() ?
253 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), m_file.buffer(), m_file.buffer_size()) :
254 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), open_input_file_or_url(m_file.filename(), &m_childpid))),
255 m_read_thread_manager(*m_decompressor, m_input_queue),
256 m_osmdata_queue(
detail::get_osmdata_queue_size(),
"parser_results"),
257 m_osmdata_queue_wrapper(m_osmdata_queue),
261 m_file_size(m_decompressor->
file_size()) {
263 (void)std::initializer_list<int>{
264 (set_option(args), 0)...
267 std::promise<osmium::io::Header> header_promise;
268 m_header_future = header_promise.get_future();
269 m_thread =
osmium::thread::thread_handler{parser_thread, 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};
272 template <
typename... TArgs>
273 explicit Reader(
const std::string& filename, TArgs&&... args) :
277 template <
typename... TArgs>
278 explicit Reader(
const char* filename, TArgs&&... args) :
305 m_status = status::closed;
307 m_read_thread_manager.stop();
309 m_osmdata_queue_wrapper.drain();
312 m_read_thread_manager.close();
320 const pid_t pid = ::waitpid(m_childpid, &status, 0);
321 #pragma GCC diagnostic push 322 #pragma GCC diagnostic ignored "-Wold-style-cast" 323 if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
324 throw std::system_error{errno, std::system_category(),
"subprocess returned error"};
326 #pragma GCC diagnostic pop 339 if (m_status == status::error) {
340 throw io_error{
"Can not get header from reader when in status 'error'"};
344 if (m_header_future.valid()) {
345 m_header = m_header_future.
get();
349 m_status = status::error;
367 if (m_status != status::okay) {
368 throw io_error{
"Can not read from reader when in status 'closed', 'eof', or 'error'"};
372 m_status = status::eof;
382 buffer = m_osmdata_queue_wrapper.pop();
383 if (detail::at_end_of_data(buffer)) {
384 m_status = status::eof;
385 m_read_thread_manager.close();
394 m_status = status::error;
404 return m_status == status::eof || m_status == status::closed;
430 return m_decompressor->offset();
443 template <
typename... TArgs>
447 Reader reader(std::forward<TArgs>(args)...);
460 #endif // OSMIUM_IO_READER_HPP detail::queue_wrapper< osmium::memory::Buffer > m_osmdata_queue_wrapper
Definition: reader.hpp:113
status
Definition: reader.hpp:97
osmium::memory::Buffer read()
Definition: reader.hpp:364
Reader(const osmium::io::File &file, TArgs &&... args)
Definition: reader.hpp:246
type
Definition: entity_bits.hpp:63
size_t file_size(int fd)
Definition: file.hpp:70
bool eof() const
Definition: reader.hpp:403
int m_childpid
Definition: reader.hpp:104
Reader(const char *filename, TArgs &&... args)
Definition: reader.hpp:278
std::future< osmium::io::Header > m_header_future
Definition: reader.hpp:115
Definition: reader_iterator.hpp:39
std::unique_ptr< osmium::io::Decompressor > m_decompressor
Definition: reader.hpp:108
object or changeset
Definition: entity_bits.hpp:76
detail::future_string_queue_type m_input_queue
Definition: reader.hpp:106
osmium::memory::Buffer read_file(TArgs &&... args)
Definition: reader.hpp:444
osmium::io::File m_file
Definition: reader.hpp:93
Namespace for everything in the Osmium library.
Definition: assembler.hpp:63
void set_option(osmium::osm_entity_bits::type value) noexcept
Definition: reader.hpp:125
void add_buffer(const Buffer &buffer)
Definition: buffer.hpp:504
osmium::io::detail::ReadThreadManager m_read_thread_manager
Definition: reader.hpp:110
size_t file_size() const noexcept
Definition: reader.hpp:411
static int execute(const std::string &command, const std::string &filename, int *childpid)
Definition: reader.hpp:163
Reader(const std::string &filename, TArgs &&... args)
Definition: reader.hpp:273
Definition: reader.hpp:91
~Reader() noexcept
Definition: reader.hpp:288
osmium::io::Header header()
Definition: reader.hpp:338
void set_option(osmium::io::read_meta value) noexcept
Definition: reader.hpp:129
size_t committed() const noexcept
Definition: buffer.hpp:263
size_t get_max_queue_size(const char *queue_name, size_t default_value) noexcept
Definition: config.hpp:69
Definition: buffer.hpp:97
size_t m_file_size
Definition: reader.hpp:120
osmium::thread::thread_handler m_thread
Definition: reader.hpp:118
static int open_input_file_or_url(const std::string &filename, int *childpid)
Definition: reader.hpp:208
detail::future_buffer_queue_type m_osmdata_queue
Definition: reader.hpp:112
osmium::io::Header m_header
Definition: reader.hpp:116
read_meta
Definition: file_format.hpp:52
Definition: entity_bits.hpp:67
static void parser_thread(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:134
Definition: compression.hpp:138
size_t offset() const noexcept
Definition: reader.hpp:429
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:95
void close()
Definition: reader.hpp:304
size_t commit()
Definition: buffer.hpp:358