73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
#include <cstring>
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include "grey.hpp"
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#include "huffman.hpp"
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std::vector<std::uint8_t> read_file(char *filename)
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{
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std::ifstream input_file{ filename, std::ios::binary | std::ios::in };
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input_file.exceptions(std::ios::badbit | std::ios::failbit);
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return std::vector<std::uint8_t>{ std::istreambuf_iterator<char>(input_file), {} };
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}
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int show_usage()
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{
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std::cerr << "Usage: grey (compress|decompress) input_file output_file." << std::endl;
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return 1;
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}
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enum class direction {
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compress,
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decompress
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};
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int main(int argc, char **argv)
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{
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direction operation;
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if (argc != 4)
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{
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return show_usage();
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}
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if (std::strcmp(argv[1], "compress") == 0)
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{
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operation = direction::compress;
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}
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else if (std::strcmp(argv[1], "decompress") == 0)
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{
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operation = direction::decompress;
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}
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else
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{
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return show_usage();
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}
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switch (operation)
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{
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case direction::compress:
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try {
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std::ofstream output_file{ argv[3], std::ios::binary | std::ios::out | std::ios::trunc };
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output_file.exceptions(std::ios::badbit | std::ios::failbit);
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auto rle_stream = to_rle(argv[2]);
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compress(rle_stream, output_file);
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break;
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}
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catch (const std::runtime_error& e)
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{
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std::cerr << "Error decoding \"" << argv[2] << "\": " << e.what() << '.' << std::endl;
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return 2;
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}
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case direction::decompress:
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{
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auto input = read_file(argv[2]);
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std::stringstream rle_stream;
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decompress(input, rle_stream);
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from_rle(rle_stream.str(), argv[3]);
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}
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break;
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}
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return 0;
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}
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