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(sctstr, shpstr, lndstr): Use short' instead of unsigned short' for

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item storage.  Rationale: Permitted values are 0..M, where M depends
on the container.  The largest M is ITEM_MAX (9999).  Benign
overflow/underflow occurs at those limits.  Catastrophic
overflow/underflow occurs at the limits of the underlying data type.
For `unsigned short', any underflow is catastrophic.  For `short',
benign undeflow happens long before catastrophic underflow.  Moreover,
unsigned arithmetic tends to trip up unwary programmers.
This commit is contained in:
Markus Armbruster 2004-03-05 07:56:50 +00:00
parent 58e93c0ea3
commit 9989c5b3ec
3 changed files with 5 additions and 5 deletions
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2
include/ship.h
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@ -93,7 +93,7 @@ struct shpstr {
short shp_lstart[TMAX]; /* How much do we pick up at the start */
short shp_lend[TMAX]; /* How much do we pick up at the end */
u_char shp_autonav; /* autonavigation flags */
u_short shp_item[I_MAX+1]; /* amount of items on board */
short shp_item[I_MAX+1]; /* amount of items on board */
u_short shp_pstage; /* plague stage */
u_short shp_ptime; /* how many etus remain in this stage */
time_t shp_access; /* Last time mob was updated (MOB_ACCESS) */