Re: Goto considered dramafull

On August 29, 2014 11:06:38 PM Thomas Shinnick wrote:
> As a data point, I find "goto" used a number of times in FF already:
>     mainline  155
>     gdraw      11
>     gutils     74

Git blame will probably indicate I've authored quite a few of the ones 
listed above.

> as well as in of course GNUlib and other friends.
> 
> Y'all have an absolute aversion to "goto" ?

1) No aversion to goto inside the same function. Important!
2) Strong aversion to goto pointing outside of a function. Avoid long jump 
like the plague.

You need to understand how compilers and CPUs work, and having said that, 
then you understand that with 1 you're still within the same stack, but 
with 2 you're going to make a mess, because you leave you're stack non-
cleanly.

My suggestion:
When you do goto inside the same function, start from the top of the 
function, and the bottom of the function, and work your way towards the 
middle. You'll see that methodology in a few of the gutil routines I did.

Once again, don't do long jumps out of the same function into another 
location - you'll only find trouble later on.

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