Protocol Buffer - Static array initialization.

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Hi All,

Our project is build using VC++(MFC) and few files have structures declared, few arrays of integers and char's and they are initialized statically. We have few static member variables initialized with data as below,

C++

char* class::m_psz[] = {
   "COL",
   "FAC",
   "MAS",
   "NOL",
   "SET"
};
 
TYPE_20 class::m_Defaults[] = {
    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0}
};

And have few typedefs as below,

C++

typedef unsigned char TYPE_20[20];

My requirement is to use Protocol Buffer concept and achieve the above. So How can i write the *.proto file (or the schema) to declare the static array of integers and initialize values to it. And finally i need to generate the *.cs (cshar file) out of it.

Below are my Basic knowladge on PB:
1) I created the classes, used "optional", "repeated" concepts.
2) created the code to declare 2d array.
3) how do I initialize the array at declaration time as it is done in C++?
Below is code of PB schema for 2d array without initialization(at static time)

repeated DefaultsForTYPE_20 m_DefaultsForTYPE_20 = 1;
message DefaultsForTYPE_20{
optional bytes m_DefaultsForTYPE_20 = 1;
}
but how can i initialize it here?

Please provide me your suggestions.

Thanks in Advance.

Posted 28-Jan-15 21:42pm

Nani22

Updated 28-Jan-15 21:51pm

CPallini

v4

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KarstenK · Answer 1 · 2015-01-29T01:49:00

your TYPE_20 is some memory with a char array of 20 chars. So you access it this way:

C++

void setDefaults( int v)
{
for(int i = 0; i < sizeof(TYPE_20); i++ )
{
m_Defaults[i] = v;//indexed access to the buffer
}
}

It is better to initialize data at runtime by calling such function.

Please read the Pointers Usage in C++ and try some code to better understand the inner conecept of C++. It is worth the time by saving you a lot of headaches. ;-)