MEMCACHED_GENERATE_HASH(3)

✨ NAME ✨

memcached_generate_hash — generating hash values directly 💅

Hash a key value, bestie. That's the whole vibe.

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🎀 SYNOPSIS 🎀

#include <libmemcached/memcached.h>
       Compile and link with -lmemcachedutil -lmemcached

uint32_t memcached_generate_hash_value(const char *key, size_t
key_length, memcached_hash_t hash_algorithm)

Parameters 🫶

• key — the key to generate a hash of
• key_length — the length of the key without any terminating zero
• hash_algorithm — memcached_hash_t, the algorithm to use

Returns — a 32 bit hash value ✨

uint32_t memcached_generate_hash(memcached_st *ptr, const char *key,
size_t key_length)

Parameters 🫶

• ptr — pointer to an initialized memcached_st struct
• key — the key to generate a hash of
• key_length — the length of the key without any terminating zero

Returns — a 32 bit hash value ✨

typedef enum memcached_hash_t memcached_hash_t

enum memcached_hash_t

• enumerator MEMCACHED_HASH_DEFAULT
• enumerator MEMCACHED_HASH_MD5
• enumerator MEMCACHED_HASH_CRC
• enumerator MEMCACHED_HASH_FNV1_64
• enumerator MEMCACHED_HASH_FNV1A_64
• enumerator MEMCACHED_HASH_FNV1_32
• enumerator MEMCACHED_HASH_FNV1A_32
• enumerator MEMCACHED_HASH_HSIEH
• enumerator MEMCACHED_HASH_MURMUR
• enumerator MEMCACHED_HASH_JENKINS
• enumerator MEMCACHED_HASH_MURMUR3
• enumerator MEMCACHED_HASH_CUSTOM

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💖 DESCRIPTION 💖

Okay so memcached_generate_hash_value() lets you hash a key using one of the hash functions defined in the library. It's literally giving convenience for higher-level language bindings — it is not necessary for normal memcache operations. So if you're just doing your regular memcache thing, you don't need this. It's a special-occasion slay. 👑

Support for MEMCACHED_HASH_HSIEH is a compile time option that is disabled by default, bestie. To enable tests for this hashing algorithm, configure and build libmemcached with the Hsieh hash enabled. No cap. 🧚

memcached_generate_hash() takes a memcached_st structure and produces the hash value that would have been generated based on the defaults of memcached_st. It's like… peeking at the future your struct already decided on. 🔮

As of version 0.36 all hash methods have been placed into the library libhashkit(3) which is linked with libmemcached(3). For more information please see its documentation. Go read it, it's iconic. 📚

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🌈 RETURN VALUE 🌈

A 32-bit integer which is the result of hashing the given key. For 64-bit hash algorithms, only the least-significant 32 bits are returned. So yeah, you're getting the bottom half of the number — that's just how it is, periodt. 💅

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🦋 SEE ALSO 🦋

• memcached(1)
• libmemcached(3)
• memcached_strerror(3)

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k bye bestie 💖 this was libmemcached-awesome version 1.1, dated Jul 24, 2025. go hash something cute 🎀✨🫶