mirror of https://github.com/macssh/macssh.git
54 lines
1.4 KiB
C
Executable File
54 lines
1.4 KiB
C
Executable File
/* mpz_jacobi (op1, op2).
|
|
Contributed by Bennet Yee (bsy) at Carnegie-Mellon University
|
|
|
|
Copyright (C) 1991, 1996 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA. */
|
|
|
|
#include "gmp.h"
|
|
|
|
/* Precondition: both p and q are positive */
|
|
|
|
int
|
|
#if __STDC__
|
|
mpz_jacobi (mpz_srcptr pi, mpz_srcptr qi)
|
|
#else
|
|
mpz_jacobi (pi, qi)
|
|
mpz_srcptr pi, qi;
|
|
#endif
|
|
{
|
|
#if GCDCHECK
|
|
int retval;
|
|
mpz_t gcdval;
|
|
|
|
mpz_init (gcdval);
|
|
mpz_gcd (gcdval, pi, qi);
|
|
if (!mpz_cmp_ui (gcdval, 1L))
|
|
{
|
|
/* J(ab,cb) = J(ab,c)J(ab,b) = J(ab,c)J(0,b) = J(ab,c)*0 */
|
|
retval = 0;
|
|
}
|
|
else
|
|
retval = mpz_legendre (pi, qi);
|
|
mpz_clear (gcdval);
|
|
return retval;
|
|
#else
|
|
return mpz_legendre (pi, qi);
|
|
#endif
|
|
}
|