diff options
Diffstat (limited to 'src/libudev/libudev-util.c')
| -rw-r--r-- | src/libudev/libudev-util.c | 58 |
1 files changed, 2 insertions, 56 deletions
diff --git a/src/libudev/libudev-util.c b/src/libudev/libudev-util.c index 4d59980a70..2c31d5b1db 100644 --- a/src/libudev/libudev-util.c +++ b/src/libudev/libudev-util.c @@ -39,6 +39,7 @@ #include "libudev.h" #include "libudev-private.h" #include "utf8.h" +#include "MurmurHash2.h" /** * SECTION:libudev-util @@ -404,64 +405,9 @@ _public_ int udev_util_encode_string(const char *str, char *str_enc, size_t len) return encode_devnode_name(str, str_enc, len); } -/* - * http://sites.google.com/site/murmurhash/ - * - * All code is released to the public domain. For business purposes, - * Murmurhash is under the MIT license. - * - */ -static unsigned int murmur_hash2(const char *key, size_t len, unsigned int seed) -{ - /* - * 'm' and 'r' are mixing constants generated offline. - * They're not really 'magic', they just happen to work well. - */ - const unsigned int m = 0x5bd1e995; - const int r = 24; - - /* initialize the hash to a 'random' value */ - unsigned int h = seed ^ len; - - /* mix 4 bytes at a time into the hash */ - const unsigned char * data = (const unsigned char *)key; - - while(len >= sizeof(unsigned int)) { - unsigned int k; - - memcpy(&k, data, sizeof(k)); - k *= m; - k ^= k >> r; - k *= m; - h *= m; - h ^= k; - - data += sizeof(k); - len -= sizeof(k); - } - - /* handle the last few bytes of the input array */ - switch(len) { - case 3: - h ^= data[2] << 16; - case 2: - h ^= data[1] << 8; - case 1: - h ^= data[0]; - h *= m; - }; - - /* do a few final mixes of the hash to ensure the last few bytes are well-incorporated */ - h ^= h >> 13; - h *= m; - h ^= h >> 15; - - return h; -} - unsigned int util_string_hash32(const char *str) { - return murmur_hash2(str, strlen(str), 0); + return MurmurHash2(str, strlen(str), 0); } /* get a bunch of bit numbers out of the hash, and set the bits in our bit field */ |