diff options
author | Lennart Poettering <lennart@poettering.net> | 2016-01-08 01:10:45 +0100 |
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committer | Sven Eden <yamakuzure@gmx.net> | 2017-05-17 15:22:15 +0200 |
commit | f7e8917981217e60a6b6071c2a1ae6367890eea0 (patch) | |
tree | a3fe28b1402478d8169da7d7ffa1e27680468e3f /src/basic/hash-funcs.c | |
parent | 07de3e94bec7f426258007c4a790a78589d2fee3 (diff) |
basic: split hash functions into their own header files
The hash operations are not really that specific to hashmaps, hence split them into a .c module of their own.
Diffstat (limited to 'src/basic/hash-funcs.c')
-rw-r--r-- | src/basic/hash-funcs.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/basic/hash-funcs.c b/src/basic/hash-funcs.c new file mode 100644 index 000000000..8d39915ba --- /dev/null +++ b/src/basic/hash-funcs.c @@ -0,0 +1,83 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of elogind. + + Copyright 2010 Lennart Poettering + Copyright 2014 Michal Schmidt + + elogind is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + elogind is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with elogind; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include "hash-funcs.h" + +void string_hash_func(const void *p, struct siphash *state) { + siphash24_compress(p, strlen(p) + 1, state); +} + +int string_compare_func(const void *a, const void *b) { + return strcmp(a, b); +} + +const struct hash_ops string_hash_ops = { + .hash = string_hash_func, + .compare = string_compare_func +}; + +void trivial_hash_func(const void *p, struct siphash *state) { + siphash24_compress(&p, sizeof(p), state); +} + +int trivial_compare_func(const void *a, const void *b) { + return a < b ? -1 : (a > b ? 1 : 0); +} + +const struct hash_ops trivial_hash_ops = { + .hash = trivial_hash_func, + .compare = trivial_compare_func +}; + +void uint64_hash_func(const void *p, struct siphash *state) { + siphash24_compress(p, sizeof(uint64_t), state); +} + +int uint64_compare_func(const void *_a, const void *_b) { + uint64_t a, b; + a = *(const uint64_t*) _a; + b = *(const uint64_t*) _b; + return a < b ? -1 : (a > b ? 1 : 0); +} + +const struct hash_ops uint64_hash_ops = { + .hash = uint64_hash_func, + .compare = uint64_compare_func +}; + +#if SIZEOF_DEV_T != 8 +void devt_hash_func(const void *p, struct siphash *state) { + siphash24_compress(p, sizeof(dev_t), state); +} + +int devt_compare_func(const void *_a, const void *_b) { + dev_t a, b; + a = *(const dev_t*) _a; + b = *(const dev_t*) _b; + return a < b ? -1 : (a > b ? 1 : 0); +} + +const struct hash_ops devt_hash_ops = { + .hash = devt_hash_func, + .compare = devt_compare_func +}; +#endif |