Created
May 4, 2022 02:08
-
-
Save JeremyGrosser/acba8ef7c5493670a2b7cd4a4fc54c61 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
with Ada.Text_IO; use Ada.Text_IO; | |
procedure Test is | |
type UInt16 is mod 2 ** 16 | |
with Size => 16; | |
type UInt32 is mod 2 ** 32 | |
with Size => 32; | |
type Words is array (Positive range <>) of UInt16 | |
with Component_Size => 16; | |
function Checksum (Data : Words) | |
return UInt16 | |
is | |
Sum : UInt32 := 0; | |
begin | |
for D of Data loop | |
Sum := Sum + UInt32 (D); | |
if Sum > 16#FFFF# then | |
Sum := Sum - 16#FFFF#; | |
end if; | |
end loop; | |
return UInt16 (Sum); | |
end Checksum; | |
function Checksum (Data : String) | |
return UInt16 | |
is | |
D : Words (1 .. Data'Length / 2) | |
with Address => Data'Address; | |
begin | |
return Checksum (D); | |
end Checksum; | |
Sum : UInt16; | |
begin | |
Sum := Checksum ("Test"); | |
Put_Line (Sum'Image); | |
end Test; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment