65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2007, David Howden.
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Copyright (C) 2010 William Hart
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******************************************************************************/
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#include <gmp.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include "flint.h"
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#include "nmod_poly.h"
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char * nmod_poly_get_str(const nmod_poly_t poly)
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{
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slong i;
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char * buf, * ptr;
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/* estimate for the length, n and three spaces */
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#if FLINT64
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slong size = 21*2 + 1;
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#else
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slong size = 11*2 + 1;
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#endif
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for (i = 0; i < poly->length; i++)
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{
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if (poly->coeffs[i]) /* log(2)/log(10) < 0.30103, +1 for space/null */
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size += (ulong) ceil(0.30103*FLINT_BIT_COUNT(poly->coeffs[i])) + 1;
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else size += 2;
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}
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buf = (char *) flint_malloc(size);
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ptr = buf + flint_sprintf(buf, "%wd %wu", poly->length, poly->mod.n);
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if (poly->length)
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ptr += flint_sprintf(ptr, " ");
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for (i = 0; i < poly->length; i++)
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ptr += flint_sprintf(ptr, " %wu", poly->coeffs[i]);
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return buf;
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}
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