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 */
27int 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
72int main()
73{
74	if (test_imath_internals() < 0)
75		return -1;
76
77	return 0;
78}
79