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-   -   [Include] Inline file loading (https://forum.sa-mp.com/showthread.php?t=497670)

Emmet_ 28/02/2014 06:03 AM

Inline file loading
 
Inline file loading

Introduction
This is just a quick experimental include that I've came up with, that allows you to load files and save the data in local variables.

How does it work?
Imagine we have this file (test.ini):

Code:

// test.ini

Level = 5
Money = 50000
Score = 100

We can simply use this code to fetch the data:

pawn Code:
public OnFilterScriptInit()
{
    import File("test.ini", level, money, score)
    {
        printf("Level: %d", level);
        printf("Money: %d", money);
        printf("Score: %d", score);
    }
    return 1;
}

And the specifiers are automatically assumed. The variables are then destroyed after the code block ends.

It works for strings, too:

pawn Code:
public OnGameModeInit()
{
    import File("mysql.ini", host[32], user[32], database[32], password[32])
    {
        mysql_connect(host, user, database, password);
    }
    return 1;
}

Basically, you can have as many parameters as you would like! Do not exceed 128 parameters, though, since that is a PAWN limitation and I have no control over it.

Searching method
First, the file is opened and a common non-alphanumeric delimiter is searched for:

Code:

1000|2000|This|is|my|file
If there is no line after that one, then it is automatically assumed the only line in the file, and uses '|' as the delimiter. I figured it would fit in since most people save files using this method (don't ask me why, it's confusing!).

After that, it detects if sscanf2 is included, and if so, forwards the parameters and the specifiers over to the native function. This also works without sscanf, but it's recommended that you use it for more reliability.

If no delimiter is found, the file is automatically assumed to be an INI file.

Specifiers
The specifier system is very clever, and has been built to be reliable as much as possible. Say we have this file:

Code:

1000|2000|This|is|my|string|3000|4000
We can simply do this to fetch the entire string:

pawn Code:
import File("file.ini", str[64])
{
    // ...
}

Outputs:

Code:

1000|2000|This|is|my|string|3000|4000
This code:

pawn Code:
import File("file.ini", str[64], str2[64])
{
    // ...
}

Outputs:

Code:

1000
2000|This|is|my|string|3000|4000

This code:

pawn Code:
import File("file.ini", str[64], str2[64], str3[64])
{
    // ...
}

Outputs:

Code:

1000
2000
This|is|my|string|3000|4000

When the last parameter is a string, it will try to append any remaining file data into that string, depending if the size is sufficient or not.

Exporting
You can also use the "export" keyword, which is exactly the same as "import" but saves the values inside global variables, instead of creating and saving them locally:

pawn Code:
new
    a,
    Float:b,
    c[32];

public OnFilterScriptInit()
{
    export File("file.ini", a, Float:b, c[32])
    {
        printf("%d, %.4f, %s", a, b, c);
    }
    return 1;
}

Parsing notes
The delimiter search is not always that reliable. For example, we could have this file:

Code:

1000|2000|This|is|my|string|3000|4000
But what if the highlighted characters are PART of the string, and not delimiters? We can simply workaround this by escaping them:

Code:

1000|2000|This\|is\|my\|string|3000|4000
However, if you are using sscanf2 with this system then this is not a problem:

pawn Code:
#include <sscanf2>
#include <file-import>

Credits
******: Macro used to determine parameter types, and sscanf2 (took me 2 days of tweaking to write the "import" macro lol).
Pastebin: FOR KILLING MY INDENTATION >:(

Downloads
Pastebin

Gnabry 28/02/2014 06:06 AM

Re: Inline file loading
 
amazing man...
U r just a genious

Lordzy 28/02/2014 06:08 AM

Re: Inline file loading
 
Looks great! I'll give it a try when I get home, nice work EMMAT.

ARamsey 28/02/2014 06:10 AM

Re: Inline file loading
 
this wll save loads of my time

Sky™ 28/02/2014 11:16 AM

Re: Inline file loading
 
Congratulations for the work

Quote:

Originally Posted by Emmet_ (Post 2933093)
FOR KILLING MY INDENTATION >:(

is good anyway :mrgreen:

iZN 28/02/2014 12:34 PM

Re: Inline file loading
 
Great work as always Emmet :p

CriticalRP 28/02/2014 02:02 PM

Re: Inline file loading
 
It seem not working. Am I doing something wrong by testing it out with your test.ini's sample?

PT 28/02/2014 02:19 PM

Re: Inline file loading
 
Very, very usefull nice job.

Whitetiger 28/02/2014 02:27 PM

Re: Inline file loading
 
I can do all these things BETTER with sscanf!

Emmet_ 28/02/2014 05:51 PM

Re: Inline file loading
 
Thanks guys.

Quote:

Originally Posted by CriticalRP (Post 2933579)
It seem not working. Am I doing something wrong by testing it out with your test.ini's sample?

Works fine for me, what code are you trying to use?

Quote:

Originally Posted by Whitetiger (Post 2933594)
I can do all these things BETTER with sscanf!

As I said, this is an experimental include, just to test out if the concept would actually work. I was thinking about adding support for sscanf2, but I would need to pass referenced parameters to a native function, but for some reason I can't get it working!


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