pqc/external/flint-2.4.3/fmpz_mod_poly/fread.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT 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.
FLINT 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 FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2007, David Howden.
Copyright (C) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include <stdio.h>
#include "flint.h"
#include "fmpz_mod_poly.h"
#include "fmpz.h"
int fmpz_mod_poly_fread(FILE * f, fmpz_mod_poly_t poly)
{
slong i, length;
fmpz_t coeff;
ulong res;
fmpz_init(coeff);
if (flint_fscanf(f, "%wd", &length) != 1) {
fmpz_clear(coeff);
return 0;
}
fmpz_fread(f,coeff);
fmpz_mod_poly_clear(poly);
fmpz_mod_poly_init(poly, coeff);
fmpz_mod_poly_fit_length(poly, length);
poly->length = length;
for (i = 0; i < length; i++)
{
res = fmpz_fread(f, coeff);
fmpz_mod_poly_set_coeff_fmpz(poly,i,coeff);
if (!res)
{
poly->length = i;
fmpz_clear(coeff);
return 0;
}
}
fmpz_clear(coeff);
_fmpz_mod_poly_normalise(poly);
return 1;
}