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;
125 m_options.read_which_entities = value;
129 m_options.read_metadata = value;
133 static void parser_thread(
const detail::ParserFactory::create_parser_type& creator,
134 detail::future_string_queue_type& input_queue,
135 detail::future_buffer_queue_type& osmdata_queue,
136 std::promise<osmium::io::Header>&& header_promise,
137 osmium::io::detail::reader_options options) {
138 std::promise<osmium::io::Header> promise = std::move(header_promise);
139 const auto parser = creator(input_queue, osmdata_queue, promise, options);
155 static int execute(
const std::string& command,
const std::string& filename,
int* childpid) {
157 if (pipe(pipefd) < 0) {
158 throw std::system_error(errno, std::system_category(),
"opening pipe failed");
160 const pid_t pid = fork();
162 throw std::system_error(errno, std::system_category(),
"fork failed");
166 for (
int i = 0; i < 32; ++i) {
167 if (i != pipefd[1]) {
171 if (dup2(pipefd[1], 1) < 0) {
175 ::open(
"/dev/null", O_RDONLY);
176 ::open(
"/dev/null", O_WRONLY);
181 if (::execlp(command.c_str(), command.c_str(),
"-g", filename.c_str(),
nullptr) < 0) {
201 std::string protocol = filename.substr(0, filename.find_first_of(
':'));
202 if (protocol ==
"http" || protocol ==
"https" || protocol ==
"ftp" || protocol ==
"file") {
204 return execute(
"curl", filename, childpid);
206 throw io_error(
"Reading OSM files from the network currently not supported on Windows.");
209 return osmium::io::detail::open_for_reading(filename);
237 template <
typename... TArgs>
239 m_file(file.check()),
240 m_creator(
detail::ParserFactory::instance().get_creator_function(m_file)),
243 m_input_queue(
detail::get_input_queue_size(),
"raw_input"),
244 m_decompressor(m_file.buffer() ?
245 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), m_file.buffer(), m_file.buffer_size()) :
246 osmium::io::
CompressionFactory::instance().create_decompressor(file.compression(), open_input_file_or_url(m_file.filename(), &m_childpid))),
247 m_read_thread_manager(*m_decompressor, m_input_queue),
248 m_osmdata_queue(
detail::get_osmdata_queue_size(),
"parser_results"),
249 m_osmdata_queue_wrapper(m_osmdata_queue),
253 m_file_size(m_decompressor->
file_size()) {
255 (void)std::initializer_list<int>{
256 (set_option(args), 0)...
259 std::promise<osmium::io::Header> header_promise;
260 m_header_future = header_promise.get_future();
261 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_options};
264 template <
typename... TArgs>
265 explicit Reader(
const std::string& filename, TArgs&&... args) :
269 template <
typename... TArgs>
270 explicit Reader(
const char* filename, TArgs&&... args) :
297 m_status = status::closed;
299 m_read_thread_manager.stop();
301 m_osmdata_queue_wrapper.drain();
304 m_read_thread_manager.close();
312 const pid_t pid = ::waitpid(m_childpid, &status, 0);
313 #pragma GCC diagnostic push 314 #pragma GCC diagnostic ignored "-Wold-style-cast" 315 if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
316 throw std::system_error(errno, std::system_category(),
"subprocess returned error");
318 #pragma GCC diagnostic pop 331 if (m_status == status::error) {
332 throw io_error(
"Can not get header from reader when in status 'error'");
336 if (m_header_future.valid()) {
337 m_header = m_header_future.
get();
339 m_status = status::eof;
344 m_status = status::error;
363 if (m_status != status::okay ||
365 throw io_error(
"Can not read from reader when in status 'closed', 'eof', or 'error'");
374 buffer = m_osmdata_queue_wrapper.pop();
375 if (detail::at_end_of_data(buffer)) {
376 m_status = status::eof;
377 m_read_thread_manager.close();
386 m_status = status::error;
396 return m_status == status::eof || m_status == status::closed;
422 return m_decompressor->offset();
435 template <
typename... TArgs>
439 Reader reader(std::forward<TArgs>(args)...);
452 #endif // OSMIUM_IO_READER_HPP detail::queue_wrapper< osmium::memory::Buffer > m_osmdata_queue_wrapper
Definition: reader.hpp:113
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::io::detail::reader_options options)
Definition: reader.hpp:133
status
Definition: reader.hpp:97
osmium::memory::Buffer read()
Definition: reader.hpp:360
Reader(const osmium::io::File &file, TArgs &&... args)
Definition: reader.hpp:238
type
Definition: entity_bits.hpp:63
size_t file_size(int fd)
Definition: file.hpp:67
bool eof() const
Definition: reader.hpp:395
int m_childpid
Definition: reader.hpp:104
Reader(const char *filename, TArgs &&... args)
Definition: reader.hpp:270
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
detail::future_string_queue_type m_input_queue
Definition: reader.hpp:106
osmium::memory::Buffer read_file(TArgs &&... args)
Definition: reader.hpp:436
osmium::io::File m_file
Definition: reader.hpp:93
Namespace for everything in the Osmium library.
Definition: assembler.hpp:73
void set_option(osmium::osm_entity_bits::type value) noexcept
Definition: reader.hpp:124
void add_buffer(const Buffer &buffer)
Definition: buffer.hpp:509
osmium::io::detail::ReadThreadManager m_read_thread_manager
Definition: reader.hpp:110
size_t file_size() const noexcept
Definition: reader.hpp:403
static int execute(const std::string &command, const std::string &filename, int *childpid)
Definition: reader.hpp:155
Reader(const std::string &filename, TArgs &&... args)
Definition: reader.hpp:265
Definition: reader.hpp:91
~Reader() noexcept
Definition: reader.hpp:280
osmium::io::Header header()
Definition: reader.hpp:330
void set_option(osmium::io::read_meta value) noexcept
Definition: reader.hpp:128
size_t committed() const noexcept
Definition: buffer.hpp:268
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:200
detail::future_buffer_queue_type m_osmdata_queue
Definition: reader.hpp:112
osmium::io::detail::reader_options m_options
Definition: reader.hpp:122
osmium::io::Header m_header
Definition: reader.hpp:116
read_meta
Definition: file_format.hpp:52
Definition: entity_bits.hpp:67
Definition: compression.hpp:138
size_t offset() const noexcept
Definition: reader.hpp:421
std::string get(const std::string &key, const std::string &default_value="") const noexcept
Definition: options.hpp:125
detail::ParserFactory::create_parser_type m_creator
Definition: reader.hpp:95
void close()
Definition: reader.hpp:296
size_t commit()
Definition: buffer.hpp:363