c++使用zlib压缩文件夹

使用zlib库压缩文件夹需要进行以下步骤：

1. 遍历文件夹，将所有文件的路径存储在数组中。

2. 使用zlib库中的函数进行文件压缩。

下面是一个示例代码：

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#include <dirent.h>
#include <sys/stat.h>

#define CHUNK 16384

void compressFile(const char *fileName, const char *zipName) {
    int err;
    FILE *sourceFile = fopen(fileName, "rb");
    FILE *zipFile = fopen(zipName, "wb");
    if (sourceFile == NULL || zipFile == NULL) {
        std::cerr << "Failed to open file!" << std::endl;
        exit(1);
    }

    z_stream stream;
    stream.zalloc = Z_NULL;
    stream.zfree = Z_NULL;
    stream.opaque = Z_NULL;
    err = deflateInit(&stream, Z_DEFAULT_COMPRESSION);
    if (err != Z_OK) {
        std::cerr << "Failed to initialize zlib!" << std::endl;
        exit(1);
    }

    unsigned char in[CHUNK];
    unsigned char out[CHUNK];
    do {
        stream.avail_in = fread(in, 1, CHUNK, sourceFile);
        if (ferror(sourceFile)) {
            std::cerr << "Failed to read file!" << std::endl;
            deflateEnd(&stream);
            exit(1);
        }
        stream.next_in = in;

        do {
            stream.avail_out = CHUNK;
            stream.next_out = out;
            err = deflate(&stream, Z_FINISH);
            if (err == Z_STREAM_ERROR) {
                std::cerr << "Failed to compress file!" << std::endl;
                deflateEnd(&stream);
                exit(1);
            }
            fwrite(out, 1, CHUNK - stream.avail_out, zipFile);
        } while (stream.avail_out == 0);

    } while (err != Z_STREAM_END);

    deflateEnd(&stream);
    fclose(sourceFile);
    fclose(zipFile);
}

void compressFolder(const char *folderName, const char *zipName) {
    DIR *dir;
    struct dirent *ent;
    struct stat st;
    char path[1024];
    dir = opendir(folderName);
    if (dir == NULL) {
        std::cerr << "Failed to open folder!" << std::endl;
        exit(1);
    }
    while ((ent = readdir(dir)) != NULL) {
        if (ent->d_name[0] == '.') {
            continue;
        }
        snprintf(path, sizeof(path), "%s/%s", folderName, ent->d_name);
        if (lstat(path, &st) < 0) {
            std::cerr << "Failed to get file status!" << std::endl;
            exit(1);
        }
        if (S_ISREG(st.st_mode)) {
            compressFile(path, zipName);
        } else if (S_ISDIR(st.st_mode)) {
            compressFolder(path, zipName);
        }
    }
    closedir(dir);
}

int main(int argc, char **argv) {
    if (argc < 3) {
        std::cerr << "Usage: " << argv[0] << " [folder] [zip file]" << std::endl;
        return 1;
    }
    compressFolder(argv[1], argv[2]);
    return 0;
}

这个程序将压缩指定文件夹中的所有文件，并将它们保存到一个zip文件中。你可以根据需要进行修改。