在小缓冲区中显示当前文件的完整路径的函数

#include <iostream>
#include <filesystem>
#include <cstring>

std::string get_current_path_with_buffer_limit(char* buffer, size_t buffer_size) {
    std::filesystem::path current_path = std::filesystem::current_path();
    std::string path_str = current_path.string();

    if (path_str.length() >= buffer_size) {
        // 路径过长，返回错误信息
        return "";
    }

    std::strncpy(buffer, path_str.c_str(), buffer_size);
    buffer[buffer_size - 1] = '\0'; // 确保字符串以null结尾
    return buffer;
}

int main() {
    const size_t buffer_size = 256;
    char buffer[buffer_size];

    std::string result = get_current_path_with_buffer_limit(buffer, buffer_size);
    if (result.empty()) {
        std::cerr << "Error: Path too long for buffer." << std::endl;
    } else {
        std::cout << "Current path: " << buffer << std::endl;
    }

    return 0;
}