Is there a glibc hash function?

Question

I'm looking to do a custom hash table implementation in C. Is there an MD5/SHA1 hash function already in the GNU library or do I have to use an external library for this?

Here's kinda what I'm looking for:

int hashValue;

hashValue = MD5_HASH(valToHash);

Answer 1

You can take a look at Bob Jenkin's survey and analysis of many hash functions:

• http://www.burtleburtle.net/bob/hash/doobs.html

Or just drop his lookup3 routines (which he's put into the public domain) into your project:

• http://www.burtleburtle.net/bob/c/lookup3.c