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#include <orcus/stream.hpp>
#include <orcus/json_parser.hpp>
#include <orcus/json_parser_thread.hpp>
#include <orcus/string_pool.hpp>
#include <vector>
#include <iostream>
#include <stdio.h>
#include <string>
#include <sys/time.h>
#define SIMULATE_PROCESSING_OVERHEAD 0
using namespace std;
using namespace orcus;
namespace {
class stack_printer
{
public:
explicit stack_printer(const char* msg) :
m_msg(msg)
{
fprintf(stdout, "%s: --begin\n", m_msg.c_str());
m_start_time = get_time();
}
~stack_printer()
{
double end_time = get_time();
fprintf(stdout, "%s: --end (duration: %g sec)\n", m_msg.c_str(), (end_time-m_start_time));
}
private:
double get_time() const
{
timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec + tv.tv_usec / 1000000.0;
}
::std::string m_msg;
double m_start_time;
};
}
class handler
{
string_pool m_pool;
json::parse_tokens_t m_tokens;
std::vector<double> m_results;
void do_work()
{
#if SIMULATE_PROCESSING_OVERHEAD
double f = m_results.empty() ? 0.0 : m_results.back();
for (size_t i = 0; i < 1000; ++i)
f += 0.1;
m_results.push_back(f);
#endif
}
public:
void begin_parse()
{
m_tokens.emplace_back(json::parse_token_t::begin_parse);
do_work();
}
void end_parse()
{
m_tokens.emplace_back(json::parse_token_t::end_parse);
do_work();
}
void begin_array()
{
m_tokens.emplace_back(json::parse_token_t::begin_array);
do_work();
}
void end_array()
{
m_tokens.emplace_back(json::parse_token_t::end_array);
do_work();
}
void begin_object()
{
m_tokens.emplace_back(json::parse_token_t::begin_object);
do_work();
}
void object_key(std::string_view s, bool transient)
{
if (transient)
s = m_pool.intern(s).first;
m_tokens.emplace_back(json::parse_token_t::object_key, s);
do_work();
}
void end_object()
{
m_tokens.emplace_back(json::parse_token_t::end_object);
do_work();
}
void boolean_true()
{
m_tokens.emplace_back(json::parse_token_t::boolean_true);
do_work();
}
void boolean_false()
{
m_tokens.emplace_back(json::parse_token_t::boolean_false);
do_work();
}
void null()
{
m_tokens.emplace_back(json::parse_token_t::null);
do_work();
}
void string(std::string_view s, bool transient)
{
if (transient)
s = m_pool.intern(s).first;
m_tokens.emplace_back(json::parse_token_t::string, s);
do_work();
}
void number(double val)
{
m_tokens.emplace_back(val);
do_work();
}
size_t token_size() const
{
return m_tokens.size();
}
double work_value() const
{
return m_results.back();
}
};
int main(int argc, char** argv) try
{
if (argc < 2)
return EXIT_FAILURE;
const char* filepath = argv[1];
orcus::file_content content(filepath);
cout << "file: " << filepath << endl;
handler hdl;
{
stack_printer __stack_printer__("parsing");
orcus::json_parser<handler> parser(content.str(), hdl);
parser.parse();
}
cout << "parsed token count: " << hdl.token_size() << endl;
#if SIMULATE_PROCESSING_OVERHEAD
cout << "work value: " << hdl.work_value() << endl;
#endif
return EXIT_SUCCESS;
}
catch (const std::exception& e)
{
cerr << e.what() << endl;
return EXIT_FAILURE;
}
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