PROTOBUF INT64 检查先前输入的数据 c++

Question

message HealthOccurrenceCount
{
    required int64 HealthID=1; 
    required int32 OccCount=2; 
    optional bytes wci=3;
}

我想根据HealthID添加数据；如果 HealthID 已经输入，那么程序应该只增加现有条目的 OccCount，而不是添加新条目。

HealthOccurrenceCount objHelthOccCount;
if(objHelthOccCount.healthid() == healthID) // Is this right or do I need to iterate all the nodes?
{
    occCount++;  
    objHelthOccCount.set_occcount(occCount);  
}
else       
    occCount = 1;

此代码是否正确，或者我应该将 HealthID 转换为字符串？

生成的代码：

// required int64 HealthID = 1;
inline bool has_healthid() const;
inline void clear_healthid();
static const int kHealthIDFieldNumber = 1;
inline ::google::protobuf::int64 healthid() const;
inline void set_healthid(::google::protobuf::int64 value);

Answer 1

根据 doc，每个单数（必填或可选）字段都有一个 has_ 方法，如果已设置该字段，则 return 为真。

您的代码将类似于：

        HealthOccurrenceCount objHelthOccCount;
        if(objHelthOccCount.has_healthid())
        {
            occCount++;  
            objHelthOccCount.set_occcount(occCount);  
        }
        else       
            occCount = 1;

PROTOBUF INT64 检查先前输入的数据 c++

PROTOBUFF INT64 check aganist previously entered data c++

c++

protocol-buffers

protobuf-net

protobuf-c