Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpz/jacobi.c, Revision 1.1.1.1
1.1 maekawa 1: /* mpz_jacobi (op1, op2).
2: Contributed by Bennet Yee (bsy) at Carnegie-Mellon University
3:
4: Copyright (C) 1991, 1996 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 Library General Public License as published by
10: the Free Software Foundation; either version 2 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 Library General Public
16: License for more details.
17:
18: You should have received a copy of the GNU Library 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 "gmp.h"
24:
25: /* Precondition: both p and q are positive */
26:
27: int
28: #if __STDC__
29: mpz_jacobi (mpz_srcptr pi, mpz_srcptr qi)
30: #else
31: mpz_jacobi (pi, qi)
32: mpz_srcptr pi, qi;
33: #endif
34: {
35: #if GCDCHECK
36: int retval;
37: mpz_t gcdval;
38:
39: mpz_init (gcdval);
40: mpz_gcd (gcdval, pi, qi);
41: if (!mpz_cmp_ui (gcdval, 1L))
42: {
43: /* J(ab,cb) = J(ab,c)J(ab,b) = J(ab,c)J(0,b) = J(ab,c)*0 */
44: retval = 0;
45: }
46: else
47: retval = mpz_legendre (pi, qi);
48: mpz_clear (gcdval);
49: return retval;
50: #else
51: return mpz_legendre (pi, qi);
52: #endif
53: }
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