SipHash v1.0.0 SipHash.Util

Utility module for minor masking and binary conversions.

Summary

Functions

Applies a 64 bit mask to the passed in number to force it to use only 64 bits. Any bits extending further than the 64th bit are zeroed and dropped

bytes_to_long(input)

Converts a binary input to an unsigned number using little endian

Functions

apply_mask64(input)

Specs

apply_mask64(number) :: number

Applies a 64 bit mask to the passed in number to force it to use only 64 bits. Any bits extending further than the 64th bit are zeroed and dropped.

Examples

iex> SipHash.Util.apply_mask64(9223372036854775808)
9223372036854775808

iex> SipHash.Util.apply_mask64(92233720368547758077)
18446744073709551613

iex> SipHash.Util.apply_mask64("test_string")
** (FunctionClauseError) no function clause matching in SipHash.Util.apply_mask64/1

bytes_to_long(input)

Specs

bytes_to_long(binary) :: number

Converts a binary input to an unsigned number using little endian.

Examples

iex> SipHash.Util.bytes_to_long(<<169,138,199>>)
13077161

iex> SipHash.Util.bytes_to_long("test_string")
125040764888893876906190196

iex> SipHash.Util.bytes_to_long(5)
** (FunctionClauseError) no function clause matching in SipHash.Util.bytes_to_long/1