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jconf_t *read_jconf(const char *file){    static jconf_t conf;    // 清空数据    memset(&conf, 0, sizeof(jconf_t));    // 用于存储文件内容的字符串指针    char *buf;    // 解析文件内容后的json结构化数据    json_value *obj;    // 打开文件    FILE *f = fopen(file, "rb");    if (f == NULL) {        FATAL("Invalid config path.");    }    // 确定文件大小, 并将读取指针移回文件开始    fseek(f, 0, SEEK_END);    long pos = ftell(f);    fseek(f, 0, SEEK_SET);    if (pos < 0) {        FATAL("Invalid config path.");    }    if (pos >= MAX_CONF_SIZE) {        FATAL("Too large config file.");    }    // 根据文件大小申请内存空间, 注意这边要多申请1个字节用于存放'\0'    buf = ss_malloc(pos + 1);    if (buf == NULL) {        FATAL("No enough memory.");    }    // 读取文件内容至buff    int nread = fread(buf, pos, 1, f);    if (!nread) {        FATAL("Failed to read the config file.");    }    // 关闭文件    fclose(f);    // 关闭字符串结尾    buf[pos] = '\0'; // end of string    json_settings settings = { 0UL, 0, NULL, NULL, NULL };    char error_buf[512];    // 解析内容至结构化json数据    obj = json_parse_ex(&settings, buf, pos, error_buf);    if (obj == NULL) {        FATAL(error_buf);    }    if (obj->type == json_object) {        unsigned int i, j;        // 遍历json数据        for (i = 0; i < obj->u.object.length; i++) {            // 每一步, 都先读取键名, 然后根据value类型, 读取value内容            char *name        = obj->u.object.values[i].name;            json_value *value = obj->u.object.values[i].value;            if (strcmp(name, "server") == 0) {                if (value->type == json_array) {                    for (j = 0; j < value->u.array.length; j++) {                        if (j >= MAX_REMOTE_NUM) {                            break;                        }                        json_value *v = value->u.array.values[j];                        char *addr_str = to_string(v);                        parse_addr(addr_str, conf.remote_addr + j);                        ss_free(addr_str);                        conf.remote_num = j + 1;                    }                } else if (value->type == json_string) {                    conf.remote_addr[0].host = to_string(value);                    conf.remote_addr[0].port = NULL;                    conf.remote_num          = 1;                }            } else if (strcmp(name, "port_password") == 0) {                if (value->type == json_object) {                    for (j = 0; j < value->u.object.length; j++) {                        if (j >= MAX_PORT_NUM) {                            break;                        }                        json_value *v = value->u.object.values[j].value;                        if (v->type == json_string) {                            conf.port_password[j].port = ss_strndup(value->u.object.values[j].name,                                                                    value->u.object.values[j].name_length);                            conf.port_password[j].password = to_string(v);                            conf.port_password_num         = j + 1;                        }                    }                }            } else if (strcmp(name, "server_port") == 0) {                conf.remote_port = to_string(value);            }            // ...        }    } else {        FATAL("Invalid config file");    }    // 释放文件内容内存空间    do {        free(buf);        buf = NULL;    } while (0);    // 释放结构化json数据空间    json_value_free(obj);    return &conf;}void *ss_malloc(size_t size) {    void *tmp = malloc(size);    if (tmp == NULL)        exit(EXIT_FAILURE);    return tmp;}

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