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author | Haru <haru@dotalux.com> | 2015-12-28 15:14:22 +0100 |
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committer | Haru <haru@dotalux.com> | 2016-01-06 15:14:49 +0100 |
commit | aa574e36fea903b9aea31ea6f52855498d9476a9 (patch) | |
tree | 97ee413e965791ddeb0a37d488eee3871c18d81b /src/map/map.h | |
parent | a1b0dae953f0dde5f614f828710bcee78b5f2b78 (diff) | |
download | hercules-aa574e36fea903b9aea31ea6f52855498d9476a9.tar.gz hercules-aa574e36fea903b9aea31ea6f52855498d9476a9.tar.bz2 hercules-aa574e36fea903b9aea31ea6f52855498d9476a9.tar.xz hercules-aa574e36fea903b9aea31ea6f52855498d9476a9.zip |
Added const variants of BL_CAST/BL_UCAST: BL_CCAST/BL_UCCAST
Signed-off-by: Haru <haru@dotalux.com>
Diffstat (limited to 'src/map/map.h')
-rw-r--r-- | src/map/map.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/map/map.h b/src/map/map.h index f785ddc83..8a32cf361 100644 --- a/src/map/map.h +++ b/src/map/map.h @@ -843,6 +843,20 @@ typedef struct elemental_data TBL_ELEM; ( ((bl) == (struct block_list *)NULL || (bl)->type != (type_)) ? (T ## type_ *)NULL : (T ## type_ *)(bl) ) /** + * Casts a const block list to a specific type. + * + * @remark + * The `bl` argument may be evaluated more than once. + * + * @param type_ The block list type (using symbols from enum bl_type). + * @param bl The source block list to cast. + * @return The block list, cast to the correct type. + * @retval NULL if bl is the wrong type or NULL. + */ +#define BL_CCAST(type_, bl) \ + ( ((bl) == (const struct block_list *)NULL || (bl)->type != (type_)) ? (const T ## type_ *)NULL : (const T ## type_ *)(bl) ) + +/** * Helper function for `BL_UCAST`. * * @warning @@ -870,6 +884,34 @@ static inline struct block_list *BL_UCAST_(struct block_list *bl) #define BL_UCAST(type_, bl) \ ((T ## type_ *)BL_UCAST_(bl)) +/** + * Helper function for `BL_UCCAST`. + * + * @warning + * This function shouldn't be called on it own. + * + * The purpose of this function is to produce a compile-timer error if a non-bl + * object is passed to BL_UCAST. It's declared as static inline to let the + * compiler optimize out the function call overhead. + */ +static inline const struct block_list *BL_UCCAST_(const struct block_list *bl) +{ + return bl; +} + +/** + * Casts a const block list to a specific type, without performing any type checks. + * + * @remark + * The `bl` argument is guaranteed to be evaluated once and only once. + * + * @param type_ The block list type (using symbols from enum bl_type). + * @param bl The source block list to cast. + * @return The block list, cast to the correct type. + */ +#define BL_UCCAST(type_, bl) \ + ((const T ## type_ *)BL_UCCAST_(bl)) + struct charid_request { struct charid_request* next; int charid;// who want to be notified of the nick |