```   1 ------------------------------------------------------------------------------
2 ------------------------------------------------------------------------------
3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
4 --                                                                          --
5 -- (C) 2017 Stanislav Datskovskiy ( www.loper-os.org )                      --
6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
7 --                                                                          --
8 -- You do not have, nor can you ever acquire the right to use, copy or      --
9 -- distribute this software ; Should you use this software for any purpose, --
10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
12 -- continue doing so for the indefinite future. In any case, please         --
13 -- always : read and understand any software ; verify any PGP signatures    --
14 -- that you use - for any purpose.                                          --
15 --                                                                          --
17 ------------------------------------------------------------------------------
18 ------------------------------------------------------------------------------
19
20 with Words; use Words;
21
22 -- Elementary Predicates on Words:
23 package W_Pred is
24
25    pragma Pure;
26
27    -- Return 1 if N is equal to 0; otherwise return 0.
28    function W_ZeroP(N : in Word) return WBool;
29    pragma Inline_Always(W_ZeroP);
30
31    -- Return 1 if N is unequal to 0; otherwise return 0.
32    function W_NZeroP(N : in Word) return WBool;
33    pragma Inline_Always(W_NZeroP);
34
35    -- Return WBool-complement of N.
36    function W_Not(N : in WBool) return WBool;
37    pragma Inline_Always(W_Not);
38
39    -- Return 1 if N is odd; otherwise return 0.
40    function W_OddP(N : in Word) return WBool;
41    pragma Inline_Always(W_OddP);
42
43    -- Return 1 if A is equal to B ; otherwise return 0.
44    function W_EqP(A : in Word; B : in Word) return WBool;
45    pragma Inline_Always(W_EqP);
46
47 end W_Pred;
```