1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
EXAMPLE osmium_read_with_progress
Reads the contents of the input file showing a progress bar.
DEMONSTRATES USE OF:
* file input
* ProgressBar utility function
SIMPLER EXAMPLES you might want to understand first:
* osmium_read
LICENSE
The code in this example file is released into the Public Domain.
*/
#include <exception>
#include <iostream> // for std::cerr
// Allow any format of input files (XML, PBF, ...)
#include <osmium/io/any_input.hpp>
// Get access to isatty utility function and progress bar utility class.
#include <osmium/util/file.hpp>
#include <osmium/util/progress_bar.hpp>
int main(int argc, char* argv[]) {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " OSMFILE\n";
return 1;
}
try {
// The Reader is initialized here with an osmium::io::File, but could
// also be directly initialized with a file name.
const osmium::io::File input_file{argv[1]};
osmium::io::Reader reader{input_file};
// Initialize progress bar, enable it only if STDERR is a TTY.
osmium::ProgressBar progress{reader.file_size(), osmium::isatty(2)};
// OSM data comes in buffers, read until there are no more.
while (const osmium::memory::Buffer buffer = reader.read()) {
// Update progress bar for each buffer.
progress.update(reader.offset());
}
// Progress bar is done.
progress.done();
// You do not have to close the Reader explicitly, but because the
// destructor can't throw, you will not see any errors otherwise.
reader.close();
} catch (const std::exception& e) {
// All exceptions used by the Osmium library derive from std::exception.
std::cerr << e.what() << '\n';
return 1;
}
}
|
