基于libzzip,压缩多级文件的代码
时间: 2024-02-05 17:12:46 浏览: 26
以下是基于libzzip的压缩多级文件的代码示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <zzip/zzip.h>
int main(void) {
ZZIP_DIR *dir;
ZZIP_DIRENT *entry;
ZZIP_FILE *file;
char *filename = "test.zip";
char *dirname = "test";
char *filename_buf = NULL;
char *dirname_buf = NULL;
size_t filename_len, dirname_len;
int ret;
/* 打开目录 */
dir = zzip_dir_open(dirname, NULL);
if (!dir) {
fprintf(stderr, "Failed to open directory %s\n", dirname);
return EXIT_FAILURE;
}
/* 创建压缩文件 */
file = zzip_file_open(filename, ZZIP_O_WRONLY | ZZIP_O_CREAT);
if (!file) {
fprintf(stderr, "Failed to create archive file %s\n", filename);
zzip_dir_close(dir);
return EXIT_FAILURE;
}
/* 遍历目录中的文件和子目录 */
while ((entry = zzip_dir_read(dir))) {
/* 获取文件名和目录名的长度 */
filename_len = strlen(entry->d_name);
dirname_len = strlen(dirname);
/* 分配缓冲区 */
filename_buf = calloc(dirname_len + 1 + filename_len + 1, sizeof(char));
dirname_buf = calloc(dirname_len + 1, sizeof(char));
/* 构造文件名和目录名 */
sprintf(dirname_buf, "%s", dirname);
sprintf(filename_buf, "%s/%s", dirname, entry->d_name);
/* 判断是否为目录 */
if (entry->d_type == DT_DIR) {
/* 递归压缩子目录 */
ret = zzip_dir_compress(filename_buf, file);
if (ret != 0) {
fprintf(stderr, "Failed to compress directory %s\n", filename_buf);
free(filename_buf);
free(dirname_buf);
zzip_file_close(file);
zzip_dir_close(dir);
return EXIT_FAILURE;
}
} else if (entry->d_type == DT_REG) {
/* 压缩文件 */
ret = zzip_file_compress(filename_buf, file);
if (ret != 0) {
fprintf(stderr, "Failed to compress file %s\n", filename_buf);
free(filename_buf);
free(dirname_buf);
zzip_file_close(file);
zzip_dir_close(dir);
return EXIT_FAILURE;
}
}
/* 释放缓冲区 */
free(filename_buf);
free(dirname_buf);
}
/* 关闭压缩文件和目录 */
zzip_file_close(file);
zzip_dir_close(dir);
return EXIT_SUCCESS;
}
```
其中,`zzip_dir_compress`和`zzip_file_compress`函数分别用于压缩子目录和文件,它们的实现如下:
```c
int zzip_dir_compress(const char *dirname, ZZIP_FILE *file) {
ZZIP_DIR *dir;
ZZIP_DIRENT *entry;
char *filename_buf = NULL;
char *dirname_buf = NULL;
size_t filename_len, dirname_len;
int ret;
/* 打开目录 */
dir = zzip_dir_open(dirname, NULL);
if (!dir) {
fprintf(stderr, "Failed to open directory %s\n", dirname);
return -1;
}
/* 遍历目录中的文件和子目录 */
while ((entry = zzip_dir_read(dir))) {
/* 获取文件名和目录名的长度 */
filename_len = strlen(entry->d_name);
dirname_len = strlen(dirname);
/* 分配缓冲区 */
filename_buf = calloc(dirname_len + 1 + filename_len + 1, sizeof(char));
dirname_buf = calloc(dirname_len + 1, sizeof(char));
/* 构造文件名和目录名 */
sprintf(dirname_buf, "%s", dirname);
sprintf(filename_buf, "%s/%s", dirname, entry->d_name);
/* 判断是否为目录 */
if (entry->d_type == DT_DIR) {
/* 递归压缩子目录 */
ret = zzip_dir_compress(filename_buf, file);
if (ret != 0) {
fprintf(stderr, "Failed to compress directory %s\n", filename_buf);
free(filename_buf);
free(dirname_buf);
return ret;
}
} else if (entry->d_type == DT_REG) {
/* 压缩文件 */
ret = zzip_file_compress(filename_buf, file);
if (ret != 0) {
fprintf(stderr, "Failed to compress file %s\n", filename_buf);
free(filename_buf);
free(dirname_buf);
return ret;
}
}
/* 释放缓冲区 */
free(filename_buf);
free(dirname_buf);
}
/* 关闭目录 */
zzip_dir_close(dir);
return 0;
}
int zzip_file_compress(const char *filename, ZZIP_FILE *file) {
ZZIP_FILE *input;
void *buffer;
size_t size;
int ret;
/* 打开输入文件 */
input = zzip_file_open(filename, ZZIP_O_RDONLY);
if (!input) {
fprintf(stderr, "Failed to open file %s\n", filename);
return -1;
}
/* 获取文件大小 */
size = zzip_file_size(input);
/* 分配缓冲区 */
buffer = malloc(size);
if (!buffer) {
fprintf(stderr, "Failed to allocate buffer for file %s\n", filename);
zzip_file_close(input);
return -1;
}
/* 读取文件内容到缓冲区 */
ret = zzip_file_read(input, buffer, size);
if (ret != size) {
fprintf(stderr, "Failed to read file %s\n", filename);
free(buffer);
zzip_file_close(input);
return -1;
}
/* 写入压缩数据到压缩文件 */
ret = zzip_file_write(file, buffer, size);
if (ret != size) {
fprintf(stderr, "Failed to write compressed data for file %s\n", filename);
free(buffer);
zzip_file_close(input);
return -1;
}
/* 关闭输入文件 */
zzip_file_close(input);
return 0;
}
```
这里通过递归遍历目录,并通过`zzip_file_compress`函数压缩文件,通过`zzip_dir_compress`函数递归压缩子目录。压缩后的数据写入到压缩文件中。需要注意的是,每次压缩需要分配缓冲区,压缩完成后需要释放缓冲区。