Using callback functions for error handling in C
- by Earlz
Hi, I have been thinking about the difficulty incurred with C error handling.. like who actually does
if(printf("hello world")==-1){exit(1);}
But you break common standards by not doing such verbose, and usually useless coding. Well what if you had a wrapper around the libc? like so you could do something like..
//main...
error_catchall(my_errors);
printf("hello world"); //this will automatically call my_errors on an error of printf
ignore=1; //this makes it so the function will return like normal and we can check error values ourself
if(fopen.... //we want to know if the file opened or not and handle it ourself.
}
int my_errors(){
if(ignore==0){
_exit(1); //exit if we aren't handling this error by flagging ignore
}
return 0;
//this is called when there is an error anywhere in the libc
}
...
I am considering making such a wrapper as I am synthesizing my own BSD licensed libc(so I already have to touch the untouchable..), but I would like to know what people think about it..
would this actually work in real life and be more useful than returning -1?
