Hello together,

i have a question regarding the configfile.
I want to write some INT values in it, but the value should be a const char*.
I'm working with ALLEGRO 5.0.4.

I think there are two solutions for it,
1. convert int to const char* (not knowing)
2. there is a function to write a int value to the config file (not knowing)

Maybe anyone can explain me the "right" way with an short example?

With best regards

MacGyver

Write yourself a function

int write_int_to_config(int i)
{
   char s[30];
  

   // convert i to string - that's a tricky job but not too hard.


   // use al_write_to_config( (const char *)s, .... ) or whatever the function is
 

}

My solution

Is there a better solution for it?

Click on the links gnolam posted.

Hello Arthur Kalliokoski,

and what's wrong with my posted solution?

Greats MacGyver

For a C++ solution, use stringstreams.

[EDIT]

Two major things from a quick skim:

• Won't handle negative integers

• returnvalue goes out of scope, so the pointer that .c_str() returns becomes invalid as soon as that function returns.

I didn't check it at all, but reinventing the wheel is usually a waste of time and often leads to bugs.

Hello,

thanks for that quick response.

Won't handle negative integers
returnvalue goes out of scope, so the pointer that .c_str() returns becomes invalid as soon as that function returns.

Negative integers are not given, but i understand you.

I'm not so confirm with

snprintf()
strtol()

can anyone explane me with a little example?

Greats MacGyver

Those are C functions. Since you are using C++, you should use stringstreams as gnolam said.

something like:

#include <sstrream>
...
    stringstream str;
    str << int_value_I_want_to_convert;
    al_set_config_value(config_file, section, key, (str.str()).c_str());
    str.str("");

Ok works for me.
Thanks

Part of being a newb (I know this from experience) is that you find yourself doing things the hard way due to lack of experience. Then you're reluctant to do things the easy way because it means all your previous hard work was a waste of time.
Anyway, here's the easy way :

I should have posted what Gnolam posted.

Been there, done that.