AG_Db * AG_DbNew (const char *backend)
int AG_DbOpen (AG_Db *db, const char *path, Uint flags)
void AG_DbClose (AG_Db *db)
int AG_DbExists (AG_Db *db, const AG_Dbt *key)
int AG_DbDel (AG_Db *db, const AG_Dbt *key)
int AG_DbGet (AG_Db *db, const AG_Dbt *key, AG_Dbt *val)
int AG_DbPut (AG_Db *db, const AG_Dbt *key, const AG_Dbt *val)
int AG_DbSync (AG_Db *db)
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The
AG_DbNew() function creates a new
AG_Db object instance.
The
backend argument specifies the database backend to use.
Available backends include:
| hash | Extended Linear Hashing (Berkeley DB)
| | btree | Sorted, Balanced Tree Structure (Berkeley DB)
| | mysql | MySQL database storage
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The
AG_DbOpen() function opens the database for further access.
The
path argument is backend-specific.
With "hash" and "btree, it may be a file name.
With "mysql", it may be set to a database name (or set to NULL to use the
default database settings).
The
AG_DbClose() function closes the database.
The
AG_DbExists() function returns 1 if the given key matches an entry in the database,
or 0 if no match was found.
The
AG_DbDel() function deletes the named entry associated with
key.
The
AG_DbGet() function retrieves the database entry referenced by the specified key.
The data is returned as newly-allocated memory in
val, and must be freed after use.
It is not necessary to initialize the supplied
val argument.
The
AG_DbPut() function writes the specified database entry.
AG_DbSync() synchronizes the actual contents of
db with any associated database files.
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