Click here to Skip to main content
13,297,321 members (57,581 online)
Click here to Skip to main content
Add your own
alternative version


4 bookmarked
Posted 5 May 2012

Simple C Hashtable

, 5 May 2012
Rate this:
Please Sign up or sign in to vote.
A simple key value-pair hashtable written in C


This is a simple key-value pair hashtable written in C, uses FNV-1 as default hash algorithm. 

Using the code 

You can see an extended example of how to use this hashtable in the file main.c. 


// First, declare the hashtable
hashtable_t tbl;

// Then, call hashtable_init with the hash function and the len function
// In this example we will use strings as key
hashtable_init(&tbl, hashtable_hash_fnv, (hashtable_len_function)strlen); 

Adding elements 

// The key and the value can be of any type(int, string, structures...)
hashtable_set(&tbl, "key", "value"); 

Removing elements 

hashtable_remove(&tbl, "key"); 

Clearing the table 


Finally, destroy the table(actually, this just call hashtable_clear


Points of Interest 

This hashtable favors neither search neither insertion. If you want a search favored hashtable you must sort the elements. 


05/05/2012 - First version. 


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Jonathan Lima
Brazil Brazil
No Biography provided

You may also be interested in...

Comments and Discussions

QuestionWrong Implementation Pin
andyxxx19-Jan-13 23:04
memberandyxxx19-Jan-13 23:04 
QuestionERROR: Undefined symbols for architecture x86_64: Pin
LindaDib9-Jan-13 1:55
memberLindaDib9-Jan-13 1:55 
GeneralHashtable? Pin
Member 962913325-Nov-12 8:09
memberMember 962913325-Nov-12 8:09 
GeneralMy vote of 4 Pin
umlcat8-Jun-12 9:20
memberumlcat8-Jun-12 9:20 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

Permalink | Advertise | Privacy | Terms of Use | Mobile
Web04 | 2.8.171207.1 | Last Updated 5 May 2012
Article Copyright 2012 by Jonathan Lima
Everything else Copyright © CodeProject, 1999-2017
Layout: fixed | fluid