Saving Classes/Structs

[willg101]

Is it possible in GE to save a class(or struct) to a .sav file?

For instance, if you had the code:

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struct playerCodes
{
         char playerName[50];
         int state;
         int type;
         int level;
         float health;
};

playerCodes strPlayerCodes[50];

Could I save this entire class to a file using the built in saveVars()? Or can you only save variables declared through the script editor menu?

[morcior]

You can save whatever you like using the c file handling methods.

See fopen, fwrite, fread and fclose.

Heres some example code of how to load and save the player actors position. You can see how you can adapt it to save the variables in a struct, even an array of them.

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int saveGame()
{
    int i;
    FILE *fil = fopen("save.gal", "wb"); // open file for binary write
 
    if(!fil) return false;


    // size_t fwrite(const void *buf, size_t size, size_t count, FILE *stream);

    fwrite(&player.loc.x, sizeof(double), 1, fil);
    fwrite(&player.loc.y, sizeof(double), 1, fil);
 
    fclose(fil);
    return 1;
}

int loadGame()
{
    int tmp_i, i;
    double tmp_d;
 
    FILE *fil = fopen("save.gal", "rb"); // open for binary read
 
    if(!fil || feof(fil)) { fclose(fil); return 0; }
 
    // size_t fread(void *buf, size_t size, size_t count, FILE * stream);
 
    fread(&tmp_d, sizeof(double), 1, fil);    player.loc.x = tmp_d;
    fread(&tmp_d, sizeof(double), 1, fil);    player.loc.y = tmp_d;

    fclose(fil);
}




[Game A Gogo]

umm, for the two int, isn't it supose to be void?

[willg101]

You mean for the function definition? or the parenthesis?
Functions can be any type (integer, float, double, long, void, etc) and in the parenthesis, you put the arguments. If there are none, you don't have to put anything in them.

Correct me here if I'm wrong, I'm still new to C\C++.

[morcior]

You're right. The functions return int data type to indicated if the load/save operation was sucessful. 0=error, 1=ok!

That way in other code you can write:

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if (loadgame())
  // load sucessful
else
  // load failed


By the way, the code is edited from another much longer piece of code I made and the load fucntion I posted is actually missing a return 1; at the end if you want it to work correctly!

[willg101]

Thank you very much, morcior!!