C++ zip库对LZSS算法的实现

以下是一个简单的C++实现，使用LZSS算法来压缩和解压缩数据：

#include <iostream>
#include <string>
#include <vector>
#include <map>

// 压缩函数
std::string compressLZSS(const std::string& data) {
    std::string compressedData;
    std::map<std::string, int> dictionary;
    int dictSize = 256;

    for (int i = 0; i < 256; i++) {
        dictionary[std::string(1, i)] = i;
    }

    std::string current;
    for (char c : data) {
        std::string newStr = current + c;
        if (dictionary.find(newStr) != dictionary.end()) {
            current = newStr;
        } else {
            compressedData += std::to_string(dictionary[current]) + ",";
            dictionary[newStr] = dictSize++;
            current = c;
        }
    }

    if (!current.empty()) {
        compressedData += std::to_string(dictionary[current]);
    }

    return compressedData;
}

// 解压缩函数
std::string decompressLZSS(const std::string& compressedData) {
    std::vector<std::string> dictionary;
    int dictSize = 256;

    for (int i = 0; i < 256; i++) {
        dictionary.push_back(std::string(1, i));
    }

    std::string decompressedData;
    std::string current;
    for (char c : compressedData) {
        int code = std::stoi(std::string(1, c));
        std::string entry;
        if (code < dictSize) {
            entry = dictionary[code];
        } else if (code == dictSize) {
            entry = current + current[0];
        } else {
            throw "Invalid compressed data";
        }

        decompressedData += entry;

        if (!current.empty()) {
            dictionary.push_back(current + entry[0]);
        }

        current = entry;
    }

    return decompressedData;
}

int main() {
    std::string data = "hellohellohelloworld";
    
    // 压缩数据
    std::string compressedData = compressLZSS(data);
    std::cout << "Compressed data: " << compressedData << std::endl;
    
    // 解压缩数据
    std::string decompressedData = decompressLZSS(compressedData);
    std::cout << "Decompressed data: " << decompressedData << std::endl;

    return 0;
}

这个实现使用了一个简单的字典来存储已经出现过的字符串，并使用其编码来代替原始数据。压缩函数将输入数据压缩为一串逗号分隔的编码数字，而解压缩函数则将这些数字解码回原始数据。请注意，这个实现只是一个简单的示例，实际应用中可能需要更复杂的处理逻辑和错误处理。