MEMCACHED_GENERATE_HASH_VALUE(3)

💖 MEMCACHED_GENERATE_HASH_VALUE — a.k.a. memcached_generate_hash_value 💖

okay bestie so you're in the libmemcached-awesome manual, section 3, and today's main character is memcached_generate_hash_value ✨ buckle up, it's giving hash-core 🦋

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✨ NAME ✨

memcached_generate_hash_value — generating hash values directly, bestie. like, hashing a key value yourself, on purpose, with your whole chest 💅

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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 — the receipts 📋

• key — the key you wanna generate a hash of, no cap
• key_length — the length of the key, and note it's without any terminating zero 🫶
• hash_algorithm — a memcached_hash_t, aka which algorithm you're picking, choose wisely ✨

Returns — a 32 bit hash value 🎀

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

Parameters — round two, keep up 💅

• ptr — pointer to an initialized memcached_st struct, initialized being the key word bestie 👀
• key — the key to generate a hash of (yes again, iconic)
• key_length — the length of the key, again without any terminating zero

Returns — a 32 bit hash value 🌈

typedef enum memcached_hash_t memcached_hash_t

enum memcached_hash_t

The whole roster, in order, no skips 🎀:

• 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 🦋

so memcached_generate_hash_value() lets you hash a key using one of the hash functions defined in the library 💖 It's literally there for the convenience of higher-level language bindings — it is not necessary for normal memcache operations, so don't come for me if you never touch it, it's fine, live your life 💅

🚨 heads up bestie: support for MEMCACHED_HASH_HSIEH is a compile time option that is disabled by default. To enable tests for this hashing algorithm, configure and build libmemcached with the Hsieh hash enabled. it's giving "opt-in only" energy ✨

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 — like, it's not inventing anything new, it's matching the vibe of your struct 🫶

and a lil history moment for you: 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. slay, they got their own house 🏠✨

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👑 RETURN VALUE 👑

A 32-bit integer which is the result of hashing the given key. and here's the fine print, don't skip it 🙈 — for 64-bit hash algorithms, only the least-significant 32 bits are returned. so if you were expecting all 64, you're getting the bottom half, periodt 💅

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🔥 SEE ALSO 🔥

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

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and that's the whole page bestie, you ate that 🍓 this was libmemcached-awesome, version 1.1, dated Jul 24, 2025 — go forth and hash responsibly, mwah 💜🧚