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

65 lines
2.0 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) 2007, David Howden.
Copyright (C) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include <stdio.h>
#include <string.h>
#include "flint.h"
#include "nmod_poly.h"
int nmod_poly_set_str(nmod_poly_t poly, const char * s)
{
const char * whitespace = " \t\n\r";
slong i, length;
mp_limb_t n;
if (flint_sscanf(s, "%wd %wu", &length, &n) != 2)
return 0;
/* jump past length (n will be skipped in first loop iter) */
s += strcspn(s, whitespace);
s += strspn(s, whitespace);
nmod_poly_fit_length(poly, length);
poly->length = length;
for (i = 0; i < length; i++)
{
s += strcspn(s, whitespace); /* jump to next whitespace */
s += strspn(s, whitespace); /* skip whitespace */
if (!flint_sscanf(s, "%wu", &poly->coeffs[i]))
{
poly->length = i;
return 0;
}
}
_nmod_poly_normalise(poly);
return 1;
}