UnrealXR/raylib
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Warning on GetRandomValue range limit (#2800)

Browse source 
Added a comment explaining the range limitations of GetRandomValue.
Added a run-time warning TRACELOG when GetRandomValue is called with an invalid range.
This commit is contained in:
Pere001 2022-11-15 12:29:19 +01:00 • committed by GitHub
parent 2604b9f72b
commit c8fd93d356
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

7
src/rcore.c
View file

@ -2817,6 +2817,13 @@ int GetRandomValue(int min, int max)
min = tmp;
}
// WARNING: Ranges higher than RAND_MAX will return invalid results. More specifically, if (max - min) > INT_MAX there will
// be an overflow, and otherwise if (max - min) > RAND_MAX the random value will incorrectly never exceed a certain threshold.
if ((unsigned int)(max - min) > (unsigned int)RAND_MAX)
{
TRACELOG(LOG_WARNING, "Invalid GetRandomValue arguments. Range should not be higher than %i.", RAND_MAX);
}
return (rand()%(abs(max - min) + 1) + min);
}