pqc/external/flint-2.4.3/fmpz_poly/fread.c
2014-05-24 23:16:06 +02:00

68 lines
1.8 KiB
C

/*=============================================================================
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) 2010 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_poly.h"
int fmpz_poly_fread(FILE * file, fmpz_poly_t poly)
{
int r;
slong i, len;
mpz_t t;
mpz_init(t);
r = mpz_inp_str(t, file, 10);
if (r == 0)
{
mpz_clear(t);
return 0;
}
if (!mpz_fits_slong_p(t))
{
flint_printf("Exception (fmpz_poly_fread). Length does not fit into a slong.\n");
abort();
}
len = flint_mpz_get_si(t);
mpz_clear(t);
fmpz_poly_fit_length(poly, len);
for (i = 0; i < len; i++)
{
r = fmpz_fread(file, poly->coeffs + i);
if (r <= 0)
return r;
}
_fmpz_poly_set_length(poly, len);
_fmpz_poly_normalise(poly);
return 1;
}