Annotation of OpenXM_contrib/gmp/tests/mpz/t-fdiv_ui.c, Revision 1.1.1.1
1.1 ohara 1: /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr_ui, mpz_fdiv_q_ui,
2: mpz_fdiv_r_ui, mpz_fdiv_ui, mpz_mul_ui.
3:
4: Copyright 1993, 1994, 1996, 2000, 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 the GNU Lesser General Public License as published by
10: the Free Software Foundation; either version 2.1 of the License, or (at your
11: option) any later version.
12:
13: The GNU MP Library is distributed in the hope that it will be useful, but
14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16: License for more details.
17:
18: You should have received a copy of the GNU Lesser General Public License
19: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21: MA 02111-1307, USA. */
22:
23: #include <stdio.h>
24: #include <stdlib.h>
25:
26: #include "gmp.h"
27: #include "gmp-impl.h"
28: #include "tests.h"
29:
30: void dump_abort _PROTO ((char *, mpz_t, unsigned long));
31: void debug_mp _PROTO ((mpz_t, int));
32:
33: int
34: main (int argc, char **argv)
35: {
36: mpz_t dividend;
37: mpz_t quotient, remainder;
38: mpz_t quotient2, remainder2;
39: mpz_t temp;
40: mp_size_t dividend_size;
41: unsigned long divisor;
42: int i;
43: int reps = 10000;
44: gmp_randstate_ptr rands;
45: mpz_t bs;
46: unsigned long bsi, size_range;
47: unsigned long r_rq, r_q, r_r, r;
48:
49: tests_start ();
50: rands = RANDS;
51:
52: mpz_init (bs);
53:
54: if (argc == 2)
55: reps = atoi (argv[1]);
56:
57: mpz_init (dividend);
58: mpz_init (quotient);
59: mpz_init (remainder);
60: mpz_init (quotient2);
61: mpz_init (remainder2);
62: mpz_init (temp);
63:
64: for (i = 0; i < reps; i++)
65: {
66: mpz_urandomb (bs, rands, 32);
67: size_range = mpz_get_ui (bs) % 10 + 2; /* 0..2047 bit operands */
68:
69: do
70: {
71: mpz_rrandomb (bs, rands, 64);
72: divisor = mpz_get_ui (bs);
73: }
74: while (divisor == 0);
75:
76: mpz_urandomb (bs, rands, size_range);
77: dividend_size = mpz_get_ui (bs);
78: mpz_rrandomb (dividend, rands, dividend_size);
79:
80: mpz_urandomb (bs, rands, 2);
81: bsi = mpz_get_ui (bs);
82: if ((bsi & 1) != 0)
83: mpz_neg (dividend, dividend);
84:
85: /* printf ("%ld\n", SIZ (dividend)); */
86:
87: r_rq = mpz_fdiv_qr_ui (quotient, remainder, dividend, divisor);
88: r_q = mpz_fdiv_q_ui (quotient2, dividend, divisor);
89: r_r = mpz_fdiv_r_ui (remainder2, dividend, divisor);
90: r = mpz_fdiv_ui (dividend, divisor);
91:
92: /* First determine that the quotients and remainders computed
93: with different functions are equal. */
94: if (mpz_cmp (quotient, quotient2) != 0)
95: dump_abort ("quotients from mpz_fdiv_qr_ui and mpz_fdiv_q_ui differ",
96: dividend, divisor);
97: if (mpz_cmp (remainder, remainder2) != 0)
98: dump_abort ("remainders from mpz_fdiv_qr_ui and mpz_fdiv_r_ui differ",
99: dividend, divisor);
100:
101: /* Check if the sign of the quotient is correct. */
102: if (mpz_cmp_ui (quotient, 0) != 0)
103: if ((mpz_cmp_ui (quotient, 0) < 0)
104: != (mpz_cmp_ui (dividend, 0) < 0))
105: dump_abort ("quotient sign wrong", dividend, divisor);
106:
107: /* Check if the remainder has the same sign as the (positive) divisor
108: (quotient rounded towards minus infinity). */
109: if (mpz_cmp_ui (remainder, 0) != 0)
110: if (mpz_cmp_ui (remainder, 0) < 0)
111: dump_abort ("remainder sign wrong", dividend, divisor);
112:
113: mpz_mul_ui (temp, quotient, divisor);
114: mpz_add (temp, temp, remainder);
115: if (mpz_cmp (temp, dividend) != 0)
116: dump_abort ("n mod d != n - [n/d]*d", dividend, divisor);
117:
118: mpz_abs (remainder, remainder);
119: if (mpz_cmp_ui (remainder, divisor) >= 0)
120: dump_abort ("remainder greater than divisor", dividend, divisor);
121:
122: if (mpz_cmp_ui (remainder, r_rq) != 0)
123: dump_abort ("remainder returned from mpz_fdiv_qr_ui is wrong",
124: dividend, divisor);
125: if (mpz_cmp_ui (remainder, r_q) != 0)
126: dump_abort ("remainder returned from mpz_fdiv_q_ui is wrong",
127: dividend, divisor);
128: if (mpz_cmp_ui (remainder, r_r) != 0)
129: dump_abort ("remainder returned from mpz_fdiv_r_ui is wrong",
130: dividend, divisor);
131: if (mpz_cmp_ui (remainder, r) != 0)
132: dump_abort ("remainder returned from mpz_fdiv_ui is wrong",
133: dividend, divisor);
134: }
135:
136: mpz_clear (bs);
137: mpz_clear (dividend);
138: mpz_clear (quotient);
139: mpz_clear (remainder);
140: mpz_clear (quotient2);
141: mpz_clear (remainder2);
142: mpz_clear (temp);
143:
144: tests_end ();
145: exit (0);
146: }
147:
148: void
149: dump_abort (char *str, mpz_t dividend, unsigned long divisor)
150: {
151: fprintf (stderr, "ERROR: %s\n", str);
152: fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
153: fprintf (stderr, "divisor = %lX\n", divisor);
154: abort();
155: }
156:
157: void
158: debug_mp (mpz_t x, int base)
159: {
160: mpz_out_str (stderr, base, x); fputc ('\n', stderr);
161: }
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