pqc/external/flint-2.4.3/fmpz_poly/get_str.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) 2010 Sebastian Pancratz
******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_poly.h"
char *
_fmpz_poly_get_str(const fmpz * poly, slong len)
{
slong i, bound;
char *str, *strbase;
if (len == 0)
{
str = (char *) flint_malloc(2 * sizeof(char));
str[0] = '0';
str[1] = '\0';
return str;
}
bound = (slong) (ceil(log10((double) (len + 1))));
for (i = 0; i < len; i++)
bound += fmpz_sizeinbase(poly + i, 10) + 1;
bound += len + 2;
strbase = (char *) flint_malloc(bound * sizeof(char));
str = strbase;
str += flint_sprintf(str, "%wd ", len);
do
{
if (!COEFF_IS_MPZ(*poly))
str += flint_sprintf(str, " %wd", *poly);
else
str += gmp_sprintf(str, " %Zd", COEFF_TO_PTR(*poly));
} while (poly++, --len);
return strbase;
}
char *
fmpz_poly_get_str(const fmpz_poly_t poly)
{
return _fmpz_poly_get_str(poly->coeffs, poly->length);
}