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#include <string>
#include <iostream>
#include <boost/optional.hpp>
#include <boost/program_options.hpp>
#include "line_accumulator.h"
boost::optional<boost::program_options::variables_map> input(
int argc, char* argv[]) {
boost::program_options::options_description optionDescription(
"Supported options"
);
optionDescription.add_options()
(
"length",
boost::program_options::value<int>(),
"Output line length"
)
(
"offset",
boost::program_options::value<int>(),
"Number of spaces to be prepended on each line"
)
(
"seed",
boost::program_options::value<std::uint32_t>(),
"Seed for pseudorandomly distributing missing spaces"
)
;
boost::program_options::variables_map variables;
try {
boost::program_options::store(
boost::program_options::parse_command_line(
argc, argv, optionDescription
),
variables
);
boost::program_options::notify(variables);
}
catch ( const std::exception& exception ) {
std::cerr << exception.what() << std::endl;
std::cout << optionDescription << std::endl;
return boost::optional<boost::program_options::variables_map>();
}
return boost::make_optional(variables);
}
bool process(const boost::program_options::variables_map& variables) {
std::cout.sync_with_stdio(false);
std::cin.sync_with_stdio(false);
std::uint8_t line_length = 60;
std::uint8_t line_offset = 0;
std::uint32_t seed = 3473018784;
if ( variables.count("length") ) {
const int user_length = variables["length"].as<int>();
if ( user_length > 1 && user_length < 256 ) {
line_length = user_length;
} else {
std::cerr << "Invalid line length.\n";
return false;
}
}
if ( variables.count("offset") ) {
const int user_offset = variables["offset"].as<int>();
if ( user_offset >= 0 && user_offset < 256 ) {
line_offset = user_offset;
} else {
std::cerr << "Invalid line offset.\n";
return false;
}
}
if ( variables.count("seed") ) {
seed = variables["seed"].as<std::uint32_t>();
}
justify::LineAccumulator acc{line_length, line_offset, seed};
std::string token;
while ( std::cin.good() ) {
if ( std::cin >> token ) {
acc(token);
} else {
return true;
}
}
return true;
}
int main(int argc, char* argv[]) {
if ( auto variables = input(argc, argv) ) {
if ( process(*variables) ) {
return 0;
} else {
return 1;
}
} else {
return 1;
}
}
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