mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-27 10:02:01 +00:00
114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
#include <iostream>
|
|
#include <random>
|
|
|
|
#include <boost/program_options.hpp>
|
|
|
|
#include <IO/ReadBufferFromFileDescriptor.h>
|
|
#include <IO/WriteBufferFromFileDescriptor.h>
|
|
#include <IO/WriteBufferFromFile.h>
|
|
|
|
#include "MarkovModel.h"
|
|
|
|
using namespace DB;
|
|
|
|
|
|
int main(int argc, char ** argv)
|
|
try
|
|
{
|
|
boost::program_options::options_description desc("Allowed options");
|
|
desc.add_options()
|
|
("help,h", "produce help message")
|
|
("create", "create model")
|
|
("order", boost::program_options::value<unsigned>(), "order of model to create")
|
|
("noise", boost::program_options::value<double>(), "relative random noise to apply to created model")
|
|
("generate", "generate random strings with model")
|
|
("max-string-size", boost::program_options::value<UInt64>()->default_value(10000), "maximum size of generated string")
|
|
("limit", boost::program_options::value<UInt64>(), "stop after specified count of generated strings")
|
|
("seed", boost::program_options::value<UInt64>(), "seed passed to random number generator")
|
|
;
|
|
|
|
boost::program_options::variables_map options;
|
|
boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
|
|
|
|
auto show_usage = [&]
|
|
{
|
|
std::cout << "Usage: \n"
|
|
<< argv[0] << " --create --order=N < strings.tsv > model\n"
|
|
<< argv[0] << " --generate < model > strings.tsv\n\n";
|
|
std::cout << desc << std::endl;
|
|
};
|
|
|
|
if (options.count("help"))
|
|
{
|
|
show_usage();
|
|
return 1;
|
|
}
|
|
|
|
ReadBufferFromFileDescriptor in(STDIN_FILENO);
|
|
WriteBufferFromFileDescriptor out(STDOUT_FILENO);
|
|
|
|
std::mt19937 random;
|
|
|
|
if (options.count("seed"))
|
|
random.seed(options["seed"].as<UInt64>());
|
|
|
|
if (options.count("create"))
|
|
{
|
|
MarkovModel model(options["order"].as<unsigned>());
|
|
|
|
String s;
|
|
while (!in.eof())
|
|
{
|
|
readText(s, in);
|
|
assertChar('\n', in);
|
|
|
|
model.consume(s.data(), s.size());
|
|
}
|
|
|
|
if (options.count("noise"))
|
|
{
|
|
double noise = options["noise"].as<double>();
|
|
model.modifyCounts([&](UInt32 count)
|
|
{
|
|
double modified = std::normal_distribution<double>(count, count * noise)(random);
|
|
if (modified < 1)
|
|
modified = 1;
|
|
|
|
return std::round(modified);
|
|
});
|
|
}
|
|
|
|
model.write(out);
|
|
}
|
|
else if (options.count("generate"))
|
|
{
|
|
MarkovModel model;
|
|
model.read(in);
|
|
String s;
|
|
|
|
UInt64 limit = options.count("limit") ? options["limit"].as<UInt64>() : 0;
|
|
UInt64 max_string_size = options["max-string-size"].as<UInt64>();
|
|
|
|
for (size_t i = 0; limit == 0 || i < limit; ++i)
|
|
{
|
|
s.resize(max_string_size);
|
|
s.resize(model.generate(&s[0], s.size(), [&]{ return random(); }));
|
|
|
|
writeText(s, out);
|
|
writeChar('\n', out);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
show_usage();
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
catch (...)
|
|
{
|
|
std::cerr << getCurrentExceptionMessage(true) << '\n';
|
|
throw;
|
|
}
|