Serializable Base Object


Environment: VC5, NT4 SP5

Since a started programming, I have used CodeGuru4s articles to learm how to write more efficient code. Now, it's my turn to make a contribution. Please keep in mind that I am beginner so if I have done something wrong or you know a better way to do this, please feel free to teach me.

I tried to define a generic base class that has generic code for serializing data. This class can be used for comunicating over a network or writing the object4s member variables to disk without you having to implemet serialization code in each of the base class' derived classes.

The class defines an internal type (BS_SIZE) that holds each member4s size. You can change this as you need. This class was made to work in both 16 and 32-bit environments, In fact, I use BS_SIZE.because many of my remote clients are running on older XT machines.

Here are the steps that you need to do in order to use the class.

  1. Define your class ID
  2. Enumerate your members
  3. Derive your class from this base class
  4. Modify the constructor to add your members
  5. Define your Set and Get Methods
Here is a quick example of how to use the class. You will find a more verbose example in the downloadable demo project at the bottom of this article.
// in this case
// member1  = int
// member 2 = char *

#define MY_ID 0x25

// members access order
enum {	member1, member2 };

class MyClass : public _BS_OBJ_
 // constructor 
  // set the object ID

  // add members
  // you will alway access member in order

 // set methods
 bool SetMember1(int & i) { return SetMemberData(member1, &i, sizeof(int)); }
 bool SetMember2(char * str) { return SetMemberData(member2, &i, strlen(str) + 1); }

 // get methods
 int    GetMember1() 
  int * i = (int *)GetMemberData(member1);
  return *i; 

 char * GetMember2() 
  return (char *)GetMemberData(member1); 

6. ready to use

int main()
 // vars to be used
 int     i      = 250;
 char *  pch    = "string for test !"; 
 void *  buffer = NULL;

 // internal _BS_OBJ_ type (unsigned long)
 BS_SIZE size   = 0; 

 // objects
 MyClass my1, my2;

 // set data on first object

 //serialize it
 size = my1.Serialize(&buffer);

 // get it on secong object

 // just to teste process
 if(my1.GetMember1() == my2.GetMember1())

 return 0;

I am currently working on a Dynamic Object and would apreciate any help .


Download demo project - 8 Kb


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