51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
#include <iostream>
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#include <stdexcept>
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#include <string>
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#include <fstream>
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#include <filesystem>
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#include <iomanip>
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static std::string readFileData(const std::string &filepath) {
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if (filepath == "") { return ""; }
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std::ifstream file(filepath, std::ios::binary | std::ios::ate);
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if (!file) throw std::runtime_error("Cannot open file.");
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std::streamsize fileSize = file.tellg();
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file.seekg(0, std::ios::beg);
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std::string data(fileSize, '\0');
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if (!file.read(&data[0], fileSize)) throw std::runtime_error("Cannot read file data.");
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return data;
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}
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std::size_t hashFile(const std::string &filepath) {
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const std::string data = readFileData(filepath);
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if (data == "") { return 0; }
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return std::hash<std::string>{}(data);
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}
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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std::cerr << "Usage: " << argv[0] << " <file_path>" << std::endl;
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return 1;
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}
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std::string filepath = argv[1];
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try {
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if (!std::filesystem::exists(filepath)) {
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std::cerr << "Error: File does not exist." << std::endl;
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return 1;
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}
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std::size_t fileHash = hashFile(filepath);
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std::cout << "Hash of file '" << filepath << "': "
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<< fileHash << " :: "
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<< std::hex << std::uppercase << std::showbase << fileHash
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<< std::endl;
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} catch (const std::exception &e) {
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std::cerr << "Error: " << e.what() << std::endl;
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return 1;
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}
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return 0;
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}
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