结构的大小和添加的各个数据类型大小不匹配

Question

我有以下结构。当我使用sizeof（ipj_tag_operation_report）打印结构的大小时，我得到值480.但是当我尝试添加此结构中包含的每种数据类型的单个大小时，我只得到405.此外，如果我添加大小数据类型，＆＃34; rssi＆＃34;字段值以第165个字节出现。但是当我在JNA中获得这个结构时，当我遍历返回的内容时，它位于数组的第51个位置。为什么这些不匹配？我在这做错了什么？请指教。

以下是我的结构及其相关结构。我已经评论了数据类型的大小。这些是我在互联网上找到的价值观。

            typedef struct 
            {
                bool has_error; //1
                ipj_error error; //4
                bool has_tag; //1
                ipj_tag tag; //174
                bool has_tag_operation_type; //1
                ipj_tag_operation_type tag_operation_type; //4
                bool has_tag_operation_data; //1
                ipj_tag_operation_data_t tag_operation_data; //72
                bool has_retries; //1
                uint32_t retries; //4
                bool has_diagnostic; //1
                uint32_t diagnostic; //4
                bool has_timestamp; //1
                uint64_t timestamp; //8
                size_t lt_buffer_count; //8
                uint32_t lt_buffer[30]; //120
            } ipj_tag_operation_report;

 typedef uint32_t ipj_error;

            typedef struct 
            {
                bool has_epc; //1
                ipj_epc_t epc; //72
                bool has_tid; //1
                ipj_tid_t tid; //56
                bool has_pc; //1
                uint32_t pc; //4
                bool has_xpc; //1
                uint32_t xpc; //4
                bool has_crc; //1
                uint32_t crc; //4
                bool has_timestamp; //1
                uint64_t timestamp; //8
                bool has_rssi; //1
                int32_t rssi; //4
                bool has_phase; //1
                int32_t phase; //4
                bool has_channel; //1
                uint32_t channel; //4
                bool has_antenna; //1
                uint32_t antenna; //4
            } ipj_tag;

typedef uint32_t ipj_tag_operation_type;

            typedef struct 
            {
                size_t size;
                uint8_t bytes[64];
            } ipj_tag_operation_data_t;

 typedef unsigned __int64    size_t;