arb/dirichlet/char_index.c

40 lines
1.3 KiB
C

/*=============================================================================
This file is part of ARB.
ARB is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
ARB 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with ARB; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2016 Pascal Molin
******************************************************************************/
#include "dirichlet.h"
void
dirichlet_char_index(dirichlet_char_t x, const dirichlet_group_t G, ulong j)
{
slong k;
for (k = G->num - 1; k >= 0; k--)
{
x->log[k] = j % G->P[k].phi.n;
j = j / G->P[k].phi.n;
}
_dirichlet_char_exp(x, G);
}