include/linux/xxhash.h

2  * xxHash - Extremely Fast Hash algorithm
3  * Copyright (C) 2012-2016, Yann Collet.
5  * BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
32  * Free Software Foundation. This program is dual-licensed; you may select
37  * - xxHash homepage: https://cyan4973.github.io/xxHash/
38  * - xxHash source repository: https://github.com/Cyan4973/xxHash
61  * MD5-32          0.33 GB/s    10       Ronald L. Rivest
62  * SHA1-32         0.28 GB/s    10
68  * A 64-bits version, named xxh64 offers much better speed,
69  * but for 64-bits applications only.
80 /*-****************************
85  * xxh32() - calculate the 32-bit hash of the input with a given seed.
89  * @seed:   The seed can be used to alter the result predictably.
93  * Return:  The 32-bit hash of the data.
95 uint32_t xxh32(const void *input, size_t length, uint32_t seed);
98  * xxh64() - calculate the 64-bit hash of the input with a given seed.
102  * @seed:   The seed can be used to alter the result predictably.
104  * This function runs 2x faster on 64-bit systems, but slower on 32-bit systems.
106  * Return:  The 64-bit hash of the data.
108 uint64_t xxh64(const void *input, size_t length, uint64_t seed);
111  * xxhash() - calculate wordsize hash of the input with a given seed
114  * @seed:   The seed can be used to alter the result predictably.
124 				   uint64_t seed)  in xxhash()  argument
127        return xxh64(input, length, seed);  in xxhash()
129        return xxh32(input, length, seed);  in xxhash()
133 /*-****************************
144  * struct xxh32_state - private xxh32 state, do not use members directly
158  * struct xxh32_state - private xxh64 state, do not use members directly
171  * xxh32_reset() - reset the xxh32 state to start a new hashing operation
174  * @seed:  Initialize the hash state with this seed.
178 void xxh32_reset(struct xxh32_state *state, uint32_t seed);
181  * xxh32_update() - hash the data given and update the xxh32 state
194  * xxh32_digest() - produce the current xxh32 hash
207  * xxh64_reset() - reset the xxh64 state to start a new hashing operation
210  * @seed:  Initialize the hash state with this seed.
212 void xxh64_reset(struct xxh64_state *state, uint64_t seed);
215  * xxh64_update() - hash the data given and update the xxh64 state
227  * xxh64_digest() - produce the current xxh64 hash
239 /*-**************************
244  * xxh32_copy_state() - copy the source state into the destination state
252  * xxh64_copy_state() - copy the source state into the destination state