1 /*
2 * Copyright 2015 INRIA Paris-Rocquencourt
3 *
4 * Use of this software is governed by the MIT license
5 *
6 * Written by Michael Kruse, INRIA Paris-Rocquencourt,
7 * Domaine de Voluceau, Rocquenqourt, B.P. 105,
8 * 78153 Le Chesnay Cedex France
9 */
10
11 #include <limits.h>
12 #include <assert.h>
13 #include <isl_imath.h>
14
15 /* This constant is not defined in limits.h, but IMath uses it */
16 #define ULONG_MIN 0ul
17
18 /* Test the IMath internals assumed by the imath implementation of isl_int.
19 *
20 * In particular, we test the ranges of IMath-defined types.
21 *
22 * Also, isl uses the existence and function of imath's struct
23 * fields. The digits are stored with less significant digits at lower array
24 * indices. Where they are stored (on the heap or in the field 'single') does
25 * not matter.
26 */
test_imath_internals()27 int test_imath_internals()
28 {
29 mpz_t val;
30 mp_result retval;
31
32 assert(sizeof(mp_small) == sizeof(long));
33 assert(MP_SMALL_MIN == LONG_MIN);
34 assert(MP_SMALL_MAX == LONG_MAX);
35
36 assert(sizeof(mp_usmall) == sizeof(unsigned long));
37 assert(MP_USMALL_MAX == ULONG_MAX);
38
39 retval = mp_int_init_value(&val, 0);
40 assert(retval == MP_OK);
41 assert(val.alloc >= val.used);
42 assert(val.used == 1);
43 assert(val.sign == MP_ZPOS);
44 assert(val.digits[0] == 0);
45
46 retval = mp_int_set_value(&val, -1);
47 assert(retval == MP_OK);
48 assert(val.alloc >= val.used);
49 assert(val.used == 1);
50 assert(val.sign == MP_NEG);
51 assert(val.digits[0] == 1);
52
53 retval = mp_int_set_value(&val, 1);
54 assert(retval == MP_OK);
55 assert(val.alloc >= val.used);
56 assert(val.used == 1);
57 assert(val.sign == MP_ZPOS);
58 assert(val.digits[0] == 1);
59
60 retval = mp_int_mul_pow2(&val, sizeof(mp_digit) * CHAR_BIT, &val);
61 assert(retval == MP_OK);
62 assert(val.alloc >= val.used);
63 assert(val.used == 2);
64 assert(val.sign == MP_ZPOS);
65 assert(val.digits[0] == 0);
66 assert(val.digits[1] == 1);
67
68 mp_int_clear(&val);
69 return 0;
70 }
71
main()72 int main()
73 {
74 if (test_imath_internals() < 0)
75 return -1;
76
77 return 0;
78 }
79