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#include <cstring>
#include <fstream>
#include <vector>
#include <cstdint>
#include <iostream>
#include "huffman.hpp"
std::vector<std::uint8_t> read_file(char *filename)
{
std::ifstream input_file{ filename, std::ios::binary | std::ios::in };
input_file.exceptions(std::ios::badbit | std::ios::failbit);
return std::vector<std::uint8_t>{ std::istreambuf_iterator<char>(input_file), {} };
}
enum class direction {
compress,
decompress
};
int show_usage()
{
std::cerr << "Usage: huffman (compress|decompress) input_file output_file." << std::endl;
return 1;
}
int main(int argc, char **argv)
{
direction operation;
if (argc != 4)
{
return show_usage();
}
if (std::strcmp(argv[1], "compress") == 0)
{
operation = direction::compress;
}
else if (std::strcmp(argv[1], "decompress") == 0)
{
operation = direction::decompress;
}
else
{
return show_usage();
}
std::vector<std::uint8_t> input;
try
{
input = read_file(argv[2]);
}
catch (std::iostream::failure& exception)
{
std::cerr << "Error opening file \"" << argv[2] << "\" for reading." << std::endl;
return 2;
}
std::ofstream output_file{ argv[3], std::ios::binary | std::ios::out | std::ios::trunc };
output_file.exceptions(std::ios::badbit | std::ios::failbit);
switch (operation)
{
case direction::compress:
compress(input, output_file);
break;
case direction::decompress:
decompress(input, output_file);
break;
}
return 0;
}
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