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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* Copyright (c) 2020 Kohei Yoshida
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
************************************************************************/
#include <iostream>
#include <fstream>
#include <mdds/trie_map.hpp>
using std::cout;
using std::endl;
enum affiliated_party_t : uint8_t
{
unaffiliated = 0,
federalist,
democratic_republican,
democratic,
whig,
republican,
national_union,
republican_national_union,
};
struct us_president
{
uint16_t year;
affiliated_party_t party;
};
std::ostream& operator<< (std::ostream& os, affiliated_party_t v)
{
static const char* names[] = {
"Unaffiliated",
"Federalist",
"Democratic Republican",
"Democratic",
"Whig",
"Republican",
"National Union",
"Republican / National Union",
};
os << names[v];
return os;
}
bool operator== (const us_president& left, const us_president& right)
{
return left.year == right.year && left.party == right.party;
}
struct us_president_serializer
{
union bin_buffer
{
char buffer[2];
uint16_t i16;
affiliated_party_t party;
};
static constexpr bool variable_size = false;
static constexpr size_t value_size = 3;
static void write(std::ostream& os, const us_president& v)
{
bin_buffer buf;
// Write the year value first.
buf.i16 = v.year;
os.write(buf.buffer, 2);
// Write the affiliated party value.
buf.party = v.party;
os.write(buf.buffer, 1);
}
static void read(std::istream& is, size_t /*n*/, us_president& v)
{
// For a fixed-size value type, this should equal the defined value size.
assert(n == 3);
bin_buffer buf;
// Read the year value.
is.read(buf.buffer, 2);
v.year = buf.i16;
// Read the affiliated party value.
is.read(buf.buffer, 1);
v.party = buf.party;
}
};
int main() try
{
using map_type = mdds::packed_trie_map<mdds::trie::std_string_traits, us_president>;
// source: https://en.wikipedia.org/wiki/List_of_presidents_of_the_United_States
//
// The entries must be sorted by the keys.
std::vector<map_type::entry> entries =
{
{ MDDS_ASCII("Abraham Lincoln"), { 1861, republican_national_union } },
{ MDDS_ASCII("Andrew Jackson"), { 1829, democratic } },
{ MDDS_ASCII("Andrew Johnson"), { 1865, national_union } },
{ MDDS_ASCII("Barack Obama"), { 2009, democratic } },
{ MDDS_ASCII("Benjamin Harrison"), { 1889, republican } },
{ MDDS_ASCII("Bill Clinton"), { 1993, democratic } },
{ MDDS_ASCII("Calvin Coolidge"), { 1923, republican } },
{ MDDS_ASCII("Chester A. Arthur"), { 1881, republican } },
{ MDDS_ASCII("Donald Trump"), { 2017, republican } },
{ MDDS_ASCII("Dwight D. Eisenhower"), { 1953, republican } },
{ MDDS_ASCII("Franklin D. Roosevelt"), { 1933, democratic } },
{ MDDS_ASCII("Franklin Pierce"), { 1853, democratic } },
{ MDDS_ASCII("George H. W. Bush"), { 1989, republican } },
{ MDDS_ASCII("George W. Bush"), { 2001, republican } },
{ MDDS_ASCII("George Washington"), { 1789, unaffiliated } },
{ MDDS_ASCII("Gerald Ford"), { 1974, republican } },
{ MDDS_ASCII("Grover Cleveland 1"), { 1885, democratic } },
{ MDDS_ASCII("Grover Cleveland 2"), { 1893, democratic } },
{ MDDS_ASCII("Harry S. Truman"), { 1945, democratic } },
{ MDDS_ASCII("Herbert Hoover"), { 1929, republican } },
{ MDDS_ASCII("James A. Garfield"), { 1881, republican } },
{ MDDS_ASCII("James Buchanan"), { 1857, democratic } },
{ MDDS_ASCII("James K. Polk"), { 1845, democratic } },
{ MDDS_ASCII("James Madison"), { 1809, democratic_republican } },
{ MDDS_ASCII("James Monroe"), { 1817, democratic_republican } },
{ MDDS_ASCII("Jimmy Carter"), { 1977, democratic } },
{ MDDS_ASCII("John Adams"), { 1797, federalist } },
{ MDDS_ASCII("John F. Kennedy"), { 1961, democratic } },
{ MDDS_ASCII("John Quincy Adams"), { 1825, democratic_republican } },
{ MDDS_ASCII("John Tyler"), { 1841, whig } },
{ MDDS_ASCII("Lyndon B. Johnson"), { 1963, democratic } },
{ MDDS_ASCII("Martin Van Buren"), { 1837, democratic } },
{ MDDS_ASCII("Millard Fillmore"), { 1850, whig } },
{ MDDS_ASCII("Richard Nixon"), { 1969, republican } },
{ MDDS_ASCII("Ronald Reagan"), { 1981, republican } },
{ MDDS_ASCII("Rutherford B. Hayes"), { 1877, republican } },
{ MDDS_ASCII("Theodore Roosevelt"), { 1901, republican } },
{ MDDS_ASCII("Thomas Jefferson"), { 1801, democratic_republican } },
{ MDDS_ASCII("Ulysses S. Grant"), { 1869, republican } },
{ MDDS_ASCII("Warren G. Harding"), { 1921, republican } },
{ MDDS_ASCII("William Henry Harrison"), { 1841, whig } },
{ MDDS_ASCII("William Howard Taft"), { 1909, republican } },
{ MDDS_ASCII("William McKinley"), { 1897, republican } },
{ MDDS_ASCII("Woodrow Wilson"), { 1913, democratic } },
{ MDDS_ASCII("Zachary Taylor"), { 1849, whig } },
};
map_type us_presidents(entries.data(), entries.size());
cout << "Number of entries: " << us_presidents.size() << endl;
cout << endl;
{
std::ofstream outfile("us-presidents.bin", std::ios::binary);
us_presidents.save_state<us_president_serializer>(outfile);
}
map_type us_presidents_loaded;
{
std::ifstream infile("us-presidents.bin", std::ios::binary);
us_presidents_loaded.load_state<us_president_serializer>(infile);
}
std::ios_base::fmtflags origflags = cout.flags();
cout << "Equal to the original? " << std::boolalpha << (us_presidents == us_presidents_loaded) << endl;
cout.setf(origflags);
cout << endl;
cout << "Presidents whose first name is 'John':" << endl;
auto results = us_presidents_loaded.prefix_search("John");
for (const auto& entry : results)
cout << " * " << entry.first << " (" << entry.second.year << "; " << entry.second.party << ")" << endl;
return EXIT_SUCCESS;
}
catch (...)
{
return EXIT_FAILURE;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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