flashdb 字符串类型的数据写入和读出的数据不一致

发布于 2022-08-12 11:15:55 浏览：748 订阅该版

```c
typedef struct
{
    uint32_t    startStamp;
    uint16_t    jumpTime;
    uint16_t    jumpCount;
    uint16_t    kCal;
    uint8_t 	mode;
    uint8_t     rate;
    uint16_t    stripTimes;
    uint16_t    stripTimer;
}trainingData_t;
void kvdb_type_string_sample(fdb_kvdb_t kvdb)
{
    rt_kprintf("==================== kvdb_type_string_sample ====================\n");
    char key[16]={0};
    trainingData_t wdata;
    memset(&wdata,0,sizeof(trainingData_t));
    for(int i=getCompileTimeStamp();i<getCompileTimeStamp()+10;i++)
    {
        sprintf(key,"%010d", i);
        wdata.startStamp = globleTimeStamp++;
        wdata.jumpCount = 1;
        wdata.jumpTime = 1;
        wdata.kCal = 1;
        wdata.mode = 1;
        wdata.rate = 1;
        wdata.stripTimer = 1;
        wdata.stripTimes = 1;
        fdb_kv_set(kvdb, key, (const char*)&wdata);
    }
    rt_kprintf("===========================================================\n");
}
```

遍历

```c
void kvdb_tarversal_sample(fdb_kvdb_t kvdb)
{
    struct fdb_kv_iterator iterator;
    fdb_kv_t cur_kv;
    struct fdb_blob blob;
    size_t data_size;
    uint8_t *data_buf;
    trainingData_t *rdata;
    fdb_kv_iterator_init(&iterator);
    rt_kprintf("==================== iterator start ====================\n");
    while (fdb_kv_iterate(kvdb, &iterator)) {
        cur_kv = &(iterator.curr_kv);
        data_size = (size_t) cur_kv->value_len;
        data_buf = (uint8_t *) malloc(data_size);
        if (data_buf == NULL) {
            rt_kprintf("Error: malloc failed.\n");
            break;
        }
        fdb_blob_read((fdb_db_t) kvdb, fdb_kv_to_blob(cur_kv, fdb_blob_make(&blob, data_buf, data_size)));
        /*
         * balabala do what ever you like with blob...
         */
        rdata = (trainingData_t*)data_buf;
        rt_kprintf("key:%s\n",cur_kv->name+1);//还有这里不加1的话，key直接不对
        rt_kprintf("startStamp: %10d\n",rdata->startStamp);
        rt_kprintf("jumpCount:  %10d\n",rdata->jumpCount);
        rt_kprintf("jumpTime:   %10d\n",rdata->jumpTime);
        rt_kprintf("kCal:       %10d\n",rdata->kCal);
        rt_kprintf("mode:       %10d\n",rdata->mode);
        rt_kprintf("rate:       %10d\n",rdata->rate);
        rt_kprintf("stripTimer: %10d\n",rdata->stripTimer);
        rt_kprintf("stripTimes: %10d\n",rdata->stripTimes);
        free(data_buf);
    }
    rt_kprintf("==================== iterator end ====================\n");
}
```

发现遍历的数据和之前写入的数据不一致；
如果用fdb_kv_set_blob这个接口写入，遍历是没问题的