128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
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/*=============================================================================
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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) 2010, 2011 Sebastian Pancratz
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Copyright (C) 2013 Mike Hansen
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******************************************************************************/
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#ifdef T
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#include "templates.h"
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#include <string.h>
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#include <math.h>
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char *_TEMPLATE(T, poly_get_str_pretty) (const TEMPLATE(T, struct) * poly,
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slong len, const char *x,
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const TEMPLATE(T, ctx_t) ctx)
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{
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char *str, **coeffstrs;
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size_t off;
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slong i, bound, nz;
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if (len == 0)
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{
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str = flint_malloc(2);
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str[0] = '0';
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str[1] = '\0';
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return str;
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}
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if (len == 1)
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{
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return TEMPLATE(T, get_str_pretty) (poly, ctx);
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}
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coeffstrs = (char **)flint_malloc(len * sizeof(char *));
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nz = 0;
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bound = 1;
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for (i = 0; i < len; i++)
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if (!TEMPLATE(T, is_zero) (poly + i, ctx))
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{
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coeffstrs[i] = TEMPLATE(T, get_str_pretty) (poly + i, ctx);
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bound += strlen(coeffstrs[i]);
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nz++;
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}
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bound += nz * (5 + strlen(x) + (slong) (ceil(log10(len))));
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str = flint_malloc(bound);
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off = 0;
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i = len - 1;
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if (TEMPLATE(T, is_one) (poly + i, ctx))
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{
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}
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else
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off += flint_sprintf(str + off, "*(%s)", coeffstrs[i]);
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if (i > 1)
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off += flint_sprintf(str + off, "%s^%wd", x, i);
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else
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off += flint_sprintf(str + off, "%s", x);
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for (--i; i > 0; --i)
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{
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if (TEMPLATE(T, is_zero) (poly + i, ctx))
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continue;
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if (!TEMPLATE(T, is_one) (poly + i, ctx))
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{
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off += flint_sprintf(str + off, "+(%s)", coeffstrs[i]);
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}
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else
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{
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off += flint_sprintf(str + off, "+");
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}
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if (i > 1)
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off += flint_sprintf(str + off, "*%s^%wd", x, i);
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else
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off += flint_sprintf(str + off, "*%s", x);
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}
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if (!TEMPLATE(T, is_zero) (poly + i, ctx))
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{
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off += flint_sprintf(str + off, "+(%s)", coeffstrs[i]);
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}
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for (i = 0; i < len; i++)
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if (!TEMPLATE(T, is_zero) (poly + i, ctx))
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{
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flint_free(coeffstrs[i]);
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}
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flint_free(coeffstrs);
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return str;
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}
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char *TEMPLATE(T, poly_get_str_pretty) (const TEMPLATE(T, poly_t) poly,
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const char *x,
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const TEMPLATE(T, ctx_t) ctx)
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{
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return _TEMPLATE(T, poly_get_str_pretty) (poly->coeffs, poly->length, x,
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ctx);
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}
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#endif
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