帮我写一个reids工具类

好的，我可以回答这个问题。Redis 是一个开源的内存数据结构存储系统，可以用作数据库、缓存和消息中间件。为了使用 Redis，我们需要使用 Redis 客户端库。以下是一个 Redis 工具类的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <hiredis/hiredis.h>

typedef struct RedisClient {
    redisContext *context;
    redisReply *reply;
} RedisClient;

RedisClient *redis_connect(const char *host, int port) {
    RedisClient *client = (RedisClient *) malloc(sizeof(RedisClient));
    client->context = redisConnect(host, port);
    if (client->context == NULL || client->context->err) {
        printf("Error: %s\n", client->context->errstr);
        exit(EXIT_FAILURE);
    }
    return client;
}

void redis_disconnect(RedisClient *client) {
    redisFree(client->context);
    free(client);
}

void redis_set(RedisClient *client, const char *key, const char *value) {
    client->reply = redisCommand(client->context, "SET %s %s", key, value);
    freeReplyObject(client->reply);
}

char *redis_get(RedisClient *client, const char *key) {
    client->reply = redisCommand(client->context, "GET %s", key);
    char *value = strdup(client->reply->str);
    freeReplyObject(client->reply);
    return value;
}

int main() {
    RedisClient *client = redis_connect("localhost", 6379);
    redis_set(client, "name", "Tom");
    char *name = redis_get(client, "name");
    printf("Name: %s\n", name);
    free(name);
    redis_disconnect(client);
    return 0;
}

这个 Redis 工具类包含了连接 Redis 服务器、设置键值对、获取键值对和断开连接等基本操作。我们可以根据自己的需求进行扩展。