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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "orcus/sax_token_parser_thread.hpp"
#include "orcus/sax_token_parser.hpp"
#include "orcus/string_pool.hpp"
#include "orcus/detail/parser_token_buffer.hpp"
#include "orcus/tokens.hpp"
#include "orcus/xml_namespace.hpp"
#include <limits>
#include <iostream>
namespace orcus { namespace sax {
parse_token::parse_token() : type(parse_token_t::unknown) {}
parse_token::parse_token(std::string_view _characters) :
type(parse_token_t::characters),
value(_characters)
{
}
parse_token::parse_token(parse_token_t _type, const xml_token_element_t* _element) :
type(_type), value(_element)
{
}
parse_token::parse_token(std::string_view msg, std::ptrdiff_t offset) :
type(parse_token_t::parse_error),
value(parse_error_value_t{msg, offset})
{
}
parse_token::parse_token(const parse_token& other) :
type(other.type), value(other.value)
{
}
bool parse_token::operator== (const parse_token& other) const
{
return type == other.type && value == other.value;
}
bool parse_token::operator!= (const parse_token& other) const
{
return !operator==(other);
}
struct parser_thread::impl
{
orcus::detail::thread::parser_token_buffer<parse_tokens_t> m_token_buffer;
string_pool m_pool;
std::vector<std::unique_ptr<xml_token_element_t>> m_element_store;
parse_tokens_t m_parser_tokens; // token buffer for the parser thread.
const char* mp_char;
size_t m_size;
const tokens& m_tokens;
xmlns_context& m_ns_cxt;
impl(const char* p, size_t n, const tokens& tks, xmlns_context& ns_cxt, size_t min_token_size, size_t max_token_size) :
m_token_buffer(min_token_size, max_token_size),
mp_char(p), m_size(n), m_tokens(tks), m_ns_cxt(ns_cxt)
{
}
void check_and_notify()
{
m_token_buffer.check_and_notify(m_parser_tokens);
}
void notify_and_finish()
{
m_token_buffer.notify_and_finish(m_parser_tokens);
}
void abort()
{
m_token_buffer.abort();
}
void declaration(const orcus::xml_declaration_t& /*decl*/)
{
}
void start_element(const orcus::xml_token_element_t& elem)
{
m_element_store.emplace_back(std::make_unique<orcus::xml_token_element_t>(elem));
orcus::xml_token_element_t& this_elem = *m_element_store.back();
// Go through all attributes and intern transient strings.
std::for_each(this_elem.attrs.begin(), this_elem.attrs.end(),
[&](xml_token_attr_t& attr)
{
if (attr.transient)
{
attr.value = m_pool.intern(attr.value).first;
attr.transient = false;
}
}
);
m_parser_tokens.emplace_back(parse_token_t::start_element, m_element_store.back().get());
check_and_notify();
}
void end_element(const orcus::xml_token_element_t& elem)
{
assert(elem.attrs.empty());
m_element_store.emplace_back(std::make_unique<orcus::xml_token_element_t>(elem));
m_parser_tokens.emplace_back(parse_token_t::end_element, m_element_store.back().get());
check_and_notify();
}
void characters(std::string_view val, bool transient)
{
if (transient)
m_parser_tokens.emplace_back(m_pool.intern(val).first);
else
m_parser_tokens.emplace_back(val);
check_and_notify();
}
void start()
{
try
{
try
{
orcus::sax_token_parser<impl> parser({mp_char, m_size}, m_tokens, m_ns_cxt, *this);
parser.parse();
}
catch (const malformed_xml_error& e)
{
std::string_view s = m_pool.intern(e.what()).first;
m_parser_tokens.emplace_back(s, e.offset());
}
// TODO : add more exceptions that need to be tokenized and processed by the client thread.
notify_and_finish();
}
catch (const orcus::detail::parsing_aborted_error&)
{
// This is used only to abort the parsing thread prematurely.
}
}
bool next_tokens(parse_tokens_t& tokens)
{
return m_token_buffer.next_tokens(tokens);
}
void swap_string_pool(string_pool& pool)
{
m_pool.swap(pool);
}
};
parser_thread::parser_thread(
const char* p, size_t n, const orcus::tokens& tks, xmlns_context& ns_cxt, size_t min_token_size) :
mp_impl(std::make_unique<parser_thread::impl>(
p, n, tks, ns_cxt, min_token_size, std::numeric_limits<size_t>::max()/2)) {}
parser_thread::parser_thread(
const char* p, size_t n, const orcus::tokens& tks, xmlns_context& ns_cxt, size_t min_token_size, size_t max_token_size) :
mp_impl(std::make_unique<parser_thread::impl>(
p, n, tks, ns_cxt, min_token_size, max_token_size)) {}
parser_thread::~parser_thread()
{
}
void parser_thread::start()
{
mp_impl->start();
}
bool parser_thread::next_tokens(parse_tokens_t& tokens)
{
return mp_impl->next_tokens(tokens);
}
void parser_thread::swap_string_pool(string_pool& pool)
{
mp_impl->swap_string_pool(pool);
}
void parser_thread::abort()
{
mp_impl->abort();
}
}}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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