diff options
Diffstat (limited to 'src/common/db.h')
| -rw-r--r-- | src/common/db.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/common/db.h b/src/common/db.h index c1b224bcd..d33b8ec2e 100644 --- a/src/common/db.h +++ b/src/common/db.h @@ -205,8 +205,6 @@ typedef int (*DBMatcher)(DBKey key, void* data, va_list args); /** * Format of the comparators used internally by the database system. * Compares key1 to key2. - * <code>maxlen</code> is the maximum number of character used in DB_STRING and - * DB_ISTRING databases. If 0, the maximum number of maxlen is used (64K). * Returns 0 is equal, negative if lower and positive is higher. * @param key1 Key being compared * @param key2 Key we are comparing to @@ -221,8 +219,6 @@ typedef int (*DBComparator)(DBKey key1, DBKey key2, unsigned short maxlen); /** * Format of the hashers used internally by the database system. * Creates the hash of the key. - * <code>maxlen</code> is the maximum number of character used in DB_STRING and - * DB_ISTRING databases. If 0, the maximum number of maxlen is used (64K). * @param key Key being hashed * @param maxlen Maximum number of characters used in DB_STRING and DB_ISTRING * databases. @@ -360,6 +356,15 @@ struct DBMap { DBIterator* (*iterator)(DBMap* self); /** + * Returns true if the entry exists. + * @param self Database + * @param key Key that identifies the entry + * @return true is the entry exists + * @protected + */ + bool (*exists)(DBMap* self, DBKey key); + + /** * Get the data of the entry identifid by the key. * @param self Database * @param key Key that identifies the entry @@ -580,6 +585,11 @@ struct DBMap { # define str2key(k) ((DBKey)(const char *)(k)) #endif /* not DB_MANUAL_CAST_TO_UNION */ +#define db_exists(db,k) ( (db)->exists((db),(k)) ) +#define idb_exists(db,k) ( (db)->exists((db),i2key(k)) ) +#define uidb_exists(db,k) ( (db)->exists((db),ui2key(k)) ) +#define strdb_exists(db,k) ( (db)->exists((db),str2key(k)) ) + #define db_get(db,k) ( (db)->get((db),(k)) ) #define idb_get(db,k) ( (db)->get((db),i2key(k)) ) #define uidb_get(db,k) ( (db)->get((db),ui2key(k)) ) @@ -707,7 +717,7 @@ DBReleaser db_custom_release(DBRelease which); * @param type Type of database * @param options Options of the database * @param maxlen Maximum length of the string to be used as key in string - * databases + * databases. If 0, the maximum number of maxlen is used (64K). * @return The interface of the database * @public * @see #DBType |