/src/gmp-6.2.1/mpz/cmp_ui.c
Line | Count | Source |
1 | | /* mpz_cmp_ui.c -- Compare an mpz_t a with an mp_limb_t b. Return positive, |
2 | | zero, or negative based on if a > b, a == b, or a < b. |
3 | | |
4 | | Copyright 1991, 1993-1996, 2001, 2002 Free Software Foundation, Inc. |
5 | | |
6 | | This file is part of the GNU MP Library. |
7 | | |
8 | | The GNU MP Library is free software; you can redistribute it and/or modify |
9 | | it under the terms of either: |
10 | | |
11 | | * the GNU Lesser General Public License as published by the Free |
12 | | Software Foundation; either version 3 of the License, or (at your |
13 | | option) any later version. |
14 | | |
15 | | or |
16 | | |
17 | | * the GNU General Public License as published by the Free Software |
18 | | Foundation; either version 2 of the License, or (at your option) any |
19 | | later version. |
20 | | |
21 | | or both in parallel, as here. |
22 | | |
23 | | The GNU MP Library is distributed in the hope that it will be useful, but |
24 | | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
25 | | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
26 | | for more details. |
27 | | |
28 | | You should have received copies of the GNU General Public License and the |
29 | | GNU Lesser General Public License along with the GNU MP Library. If not, |
30 | | see https://www.gnu.org/licenses/. */ |
31 | | |
32 | | #include "gmp-impl.h" |
33 | | |
34 | | int |
35 | | _mpz_cmp_ui (mpz_srcptr u, unsigned long int v_digit) __GMP_NOTHROW |
36 | 5.95M | { |
37 | 5.95M | mp_ptr up; |
38 | 5.95M | mp_size_t un; |
39 | 5.95M | mp_limb_t ul; |
40 | | |
41 | 5.95M | up = PTR(u); |
42 | 5.95M | un = SIZ(u); |
43 | | |
44 | 5.95M | if (un == 0) |
45 | 93 | return -(v_digit != 0); |
46 | | |
47 | 5.95M | if (un == 1) |
48 | 5.90M | { |
49 | 5.90M | ul = up[0]; |
50 | 5.90M | if (ul > v_digit) |
51 | 5.90M | return 1; |
52 | 1.22k | if (ul < v_digit) |
53 | 500 | return -1; |
54 | 727 | return 0; |
55 | 1.22k | } |
56 | | |
57 | | #if GMP_NAIL_BITS != 0 |
58 | | if (v_digit > GMP_NUMB_MAX) |
59 | | { |
60 | | if (un == 2) |
61 | | { |
62 | | ul = up[0] + (up[1] << GMP_NUMB_BITS); |
63 | | |
64 | | if ((up[1] >> GMP_NAIL_BITS) != 0) |
65 | | return 1; |
66 | | |
67 | | if (ul > v_digit) |
68 | | return 1; |
69 | | if (ul < v_digit) |
70 | | return -1; |
71 | | return 0; |
72 | | } |
73 | | } |
74 | | #endif |
75 | | |
76 | 44.1k | return un > 0 ? 1 : -1; |
77 | 5.95M | } |