gdbm

GNU dbm is a library of database functions that use extensible
hashing and work similar to the standard UNIX dbm. These routines are
provided to a programmer needing to create and manipulate a hashed
database.
The basic use of GDBM is to store key/data pairs in a data file. Each
key must be unique and each key is paired with only one data item.
The library provides primitives for storing key/data pairs, searching
and retrieving the data by its key and deleting a key along with its
data. It also supports sequential iteration over all key/data pairs in
a database.

          

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License: GPL-3.0-or-later
URL: https://www.gnu.org/software/gdbm/