HASH(9) | Kernel Developer's Manual | HASH(9) |
hash
, hash32_buf
,
hash32_str
, hash32_strn
—
#include <sys/types.h>
#include <sys/hash.h>
uint32_t
hash32_buf
(const
void *buf, size_t
len, uint32_t
ihash);
uint32_t
hash32_str
(const
void *buf, uint32_t
ihash);
uint32_t
hash32_strn
(const
void *buf, size_t
len, uint32_t
ihash);
hash
functions returns a hash of the given buffer.
The hash32_buf
() function returns a 32 bit
hash of buf, which is len bytes
long, seeded with an initial hash of ihash (which is
usually HASH32_BUF_INIT
). This function may use a
different algorithm to hash32_str
() and
hash32_strn
().
The hash32_str
() function returns a 32 bit
hash of buf, which is a NUL
terminated ASCII string, seeded with an initial hash of
ihash (which is usually
HASH32_STR_INIT
). This function must use the same
algorithm as hash32_strn
(), so that the same data
returns the same hash.
The hash32_strn
() function returns a 32
bit hash of buf, which is a
NUL
terminated ASCII string, up to a maximum of
len bytes, seeded with an initial hash of
ihash (which is usually
HASH32_STR_INIT
). This function must use the same
algorithm as hash32_str
(), so that the same data
returns the same hash.
The ihash parameter is provided to allow for incremental hashing by allowing successive calls to use a previous hash value.
December 5, 2001 | NetBSD 9.0 |