package frenetic

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package frenetic
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Bit manipulation for integers

Though Std has bitwise and's, or's and shifting, Frenetic needs some more bit-specific primitives. Other libraries like bitv have them, but they require converting back and forth to abstract data types ... this approach is faster and less complex.

val clear_bit : int -> int32 -> int32

clear_bit n x sets bit n in integer x to 0

val set_bit : int -> int32 -> int32

set_bit n x sets bit n in integer x to 1

val bit : int32 -> int -> bool -> int32

bit x n set_bit sets bit n of integer x to 1 if set_bit=true, 0 otherwise.

val test_bit : int -> int32 -> bool

test_bit n x returns true if bit n in integer x is 1

val get_byte32 : int32 -> int -> int

get_byte32 x n returns the n'th byte of int32 x. The least significant byte is 0, the most is 3. Raises error if n is not in 0..3

val get_byte : int64 -> int -> int

get_byte x n returns the n'th byte of int64 x. The least significant byte is 0, the most is 7. Raises error if n is not in 0..7