hyung-hwan/hcl
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

changed hcl_hash_bytes() to sdbm hash

Browse Source
This commit is contained in:
hyung-hwan 2019-03-01 07:51:53 +00:00
parent 2b14218a43
commit d75b34126e
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/utl.c
View File

@ -41,7 +41,13 @@ hcl_oow_t hcl_hash_bytes (const hcl_oob_t* ptr, hcl_oow_t len)
const hcl_uint8_t* bp, * be;
bp = ptr; be = bp + len;
while (bp < be) h = h * 31 + *bp++;
/* this hash doesn't produce good distribution */
/*while (bp < be) h = h * 31 + *bp++; */
/* SDBM hash is known to produce good overall distribution
* for many different data sets */
while (bp < be) h = (h << 6) + (h << 16) - h + *bp++;
/* constrain the hash value to be representable in a small integer
* for convenience sake */