diff options
| author | Markus Uhlin <markus@nifty-networks.net> | 2025-04-05 19:39:22 +0200 |
|---|---|---|
| committer | Markus Uhlin <markus@nifty-networks.net> | 2025-04-05 19:39:22 +0200 |
| commit | 8e33dc5eea79f5ee60c69d82a3a24e4d632f9e7d (patch) | |
| tree | 009775c886b28cfae9960e3fe49b15ef010c8a3e /FICS/ratings.c | |
| parent | f016d2b0dbdc6834bc298a4e4c89ff9b583ce940 (diff) | |
Added int_diff() which checks for overflow
Diffstat (limited to 'FICS/ratings.c')
| -rw-r--r-- | FICS/ratings.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/FICS/ratings.c b/FICS/ratings.c index 8fd683c..5f06ccc 100644 --- a/FICS/ratings.c +++ b/FICS/ratings.c @@ -1304,6 +1304,18 @@ com_statistics(int p, param_list param) return COM_OK; } +/* + * Return the difference of 'a - b' + */ +PUBLIC int +int_diff(const char *fn, const int a, const int b) +{ + if ((b > 0 && a < INT_MIN + b) || + (b < 0 && a > INT_MAX + b)) + errx(1, "%s: integer overflow (%d - %d)", fn, a, b); + return (a - b); +} + PUBLIC int com_fixrank(int p, param_list param) { |