Chars? floats? Saving games?

[Zasisem]

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How does saving work on PSP? Or any platform? Do they save certain chars? Floats? What kind of information does it save? basically how does saving work? Do they save certain variables or something? Like say you have in a game:

You start with:

Spoiler

Coins: 0
Health: 500
Level: 1

Later in the game your with:

Spoiler

Coins: 1000
Health: 375
Level: 54

I'm guessing the the local variables would be:

Code: Select all

int Coins = 0,
     Health = 500,
     Level = 1;


I sense incorrect statements already.. Lol but I am asking a question.

[NightStar3]

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Take a look at some online code samples and look at the psputility_savedata.h file
for more information

[Zasisem]

Take a look at some online code samples and look at the psputility_savedata.h file
for more information

They don't explain how they can save certain data into "gibirish code" that we cant read then load back again later though... I'll take a look though

[codestation]

The data that needs to be saved depends entirely of you and how much you want to reconstruct of the game when the user loads the savedata. For example, if you make a 2d side scrolling game like sonic, then you only need to save the rings number, level, score, emeralds, lives and optionally the checkpoint number in the level (of course, if you want to save only the level and drop everything else its fine too).

If you game is simple enough then yu can save simple data types, else you could save the structs, or if you are using objects then you can serialize them to the savedata so you can load the exact state later.

If you are asking how then it can be as simple as:

Code: Select all

typedef struct {
   int level;
   int score;
} savedata;
........
savedata data;
.........
data.level = current_level;
data.score = current_score;
fwrite(&data, sizeof(data), 1, fd); //if you are managing the file yourself
// or just call the savedata_utility and give them the struct pointer
..........


Also you don't need to worry about that "gibirish code/data", just read it in the same way that you are saving it and you will be fine.

[m0skit0]

TL;DR: each game/developer has his own way to store information on the savegame. This depends on what you want to save and how you want to save it. Usually, it's binary (to load fast) and with no standard format (not that there's any anyway...).