[Fixed] Too much XP resets to negative number

vittu · **Author**

Tested on:
Windows XP
Amxmodx 1.01
Metamod 1.17.4
SuperHero Mod 1.18CVS
Vault Saving

Regaurdless of my tests specs, this will happen on all amx/x and shmod versions.

Bug:
If a user is to surpass 2147483647xp, their xp will be changed to a negative number starting from -2147483648 and they will lose all their levels. A check is needed to limit xp gain to no more then 2147483647xp. Because that is the integer limit Small can handle.

Tassadarmaster · 04-21-2005 , 00:59

how do you fix that?

guy · 04-21-2005 , 01:18

im just wondering whos server has THAT much xp
2 billion honestly.
and if some of their kill xp is like 10k they should divide everything by two or something.
did someone confront you with this bug or were you just testing?

vittu · 04-21-2005 , 12:41

Quote:

Originally Posted by guy

im just wondering whos server has THAT much xp

you'd be suprised...

This came about because of this post where Iconoclast set his level ammounts too high... (his max was 24,879,640,000... and you thought 2 billion was excessive)

guy · 04-21-2005 , 13:09

jesus do people even level on his server?!
also is there any specific reason that its that integer that small cant handle it or was it just random?
*curious george*
new shmod server people should be aware of this until its fixed.
im so surprised because i played on a 60 lvls server and the lvl 60's only went up to 10 mill...
edit
thats crazy.
the more you know

vittu · 04-21-2005 , 14:00

It's a Mersenne prime that is used in for 32 bit coding languages for signed integers (signed meaning + -). because code is binary 2 numbers, 2^#

Quote:

M31 = 2^31 - 1 = 0x7FFFFFFF. It also happens to be the largest signed 32-bit integer (available in many programing languages, i.e., C/C++ int on 32-bit platforms).

Quote:

most computers use 32 "bits" to store integer numbers. The largest number you can fit inside 32 bits is 4,294,967,295. However, in order to have "signed" integers (which means that you can have negative numbers) you need to give up one of those bits. So you really only have 31 bits to store your numbers. The largest number you can fit inside 31 bits is 2,147,483,647.

jtp10181 · 05-03-2005 , 21:05

fixed in CVS