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#include <iostream>
#include <cstdlib>
#include <array>
#include "utf8.h"
#include "context.hpp"
#include "utf8/checked.h"
static
context_model process_input()
{
std::array<char, 4096> buffer;
std::ptrdiff_t left_over{ 0 };
context_model context;
while (!std::cin.eof())
{
std::cin.read(buffer.data() + left_over, buffer.size() - left_over);
std::array<char, 4096>::iterator octet_iterator = std::begin(buffer);
std::array<char, 4096>::iterator start_iterator = octet_iterator;
std::array<char, 4096>::iterator end_iterator = octet_iterator + std::cin.gcount() + left_over;
try
{
while (start_iterator != end_iterator)
{
utf8::utfchar32_t character = utf8::next(start_iterator, end_iterator);
context.add(character);
octet_iterator = start_iterator;
}
left_over = 0;
}
catch (const utf8::not_enough_room&)
{
std::copy(octet_iterator, end_iterator, std::begin(buffer));
left_over = std::distance(octet_iterator, end_iterator);
}
}
return context;
}
/*
* Reads a UTF-8 file from stdin, analyzes it and prints context information.
*/
int main(int argc, char **argv)
{
context_model context = process_input();
std::size_t i{ 0 };
for (auto [context_characters, occurrence]: context)
{
++i;
std::cout << i << ". " << context_characters << ": ";
for (auto [character, count]: occurrence)
{
std::string character_bytes;
utf8::append(character, character_bytes);
std::cout << character_bytes << " - " << count << "; ";
}
std::cout << std::endl;
}
return EXIT_SUCCESS;
}
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