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/* SPDX-License-Identifier: BSD-2-Clause
*
* This file is part of pyosmium. (https://osmcode.org/pyosmium/)
*
* Copyright (C) 2024 Sarah Hoffmann <lonvia@denofr.de> and others.
* For a full list of authors see the git log.
*/
#ifndef PYOSMIUM_BUFFER_ITERATOR_H
#define PYOSMIUM_BUFFER_ITERATOR_H
#include <queue>
#include <pybind11/pybind11.h>
#include "osmium_module.h"
#include "osm_base_objects.h"
#include "handler_chain.h"
namespace pyosmium {
class BufferIterator
{
public:
BufferIterator(pybind11::args args)
: m_handler(args)
{}
void add_buffer(osmium::memory::Buffer &&buf)
{
if (m_buffers.empty()) {
m_current_it = buf.begin();
}
m_buffers.push(std::move(buf));
}
bool empty() const
{ return m_buffers.empty(); }
pybind11::object next()
{
m_current.emplace<bool>(false);
if (m_buffers.empty()) {
throw pybind11::stop_iteration();
}
while (true) {
while (m_current_it == m_buffers.front().end()) {
m_buffers.pop();
if (m_buffers.empty()) {
throw pybind11::stop_iteration();
}
m_current_it = m_buffers.front().begin();
}
osmium::OSMEntity *entity = &*m_current_it;
++m_current_it;
switch (entity->type()) {
case osmium::item_type::node:
{
auto &obj = m_current.emplace<PyOSMNode>(entity);
if (!m_handler.node(obj)) {
return obj.get_or_create_python_object();
}
break;
}
case osmium::item_type::way:
{
auto &obj = m_current.emplace<PyOSMWay>(entity);
if (!m_handler.way(obj)) {
return obj.get_or_create_python_object();
}
break;
}
case osmium::item_type::relation:
{
auto &obj = m_current.emplace<PyOSMRelation>(entity);
if (!m_handler.relation(obj)) {
return obj.get_or_create_python_object();
}
break;
}
case osmium::item_type::area:
{
auto &obj = m_current.emplace<PyOSMArea>(entity);
if (!m_handler.area(obj)) {
return obj.get_or_create_python_object();
}
break;
}
case osmium::item_type::changeset:
{
auto &obj = m_current.emplace<PyOSMChangeset>(entity);
if (!m_handler.changeset(obj)) {
return obj.get_or_create_python_object();
}
break;
}
default:
break;
}
}
return pybind11::object();
}
private:
HandlerChain m_handler;
std::queue<osmium::memory::Buffer> m_buffers;
osmium::memory::Buffer::iterator m_current_it;
PyOSMAny m_current = false;
};
} // namespace
#endif // PYOSMIUM_BUFFER_ITERATOR_H
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