pqc/external/flint-2.4.3/fq_poly_templates/get_str_pretty.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, 2011 Sebastian Pancratz
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
#include <string.h>
#include <math.h>
char *_TEMPLATE(T, poly_get_str_pretty) (const TEMPLATE(T, struct) * poly,
slong len, const char *x,
const TEMPLATE(T, ctx_t) ctx)
{
char *str, **coeffstrs;
size_t off;
slong i, bound, nz;
if (len == 0)
{
str = flint_malloc(2);
str[0] = '0';
str[1] = '\0';
return str;
}
if (len == 1)
{
return TEMPLATE(T, get_str_pretty) (poly, ctx);
}
coeffstrs = (char **)flint_malloc(len * sizeof(char *));
nz = 0;
bound = 1;
for (i = 0; i < len; i++)
if (!TEMPLATE(T, is_zero) (poly + i, ctx))
{
coeffstrs[i] = TEMPLATE(T, get_str_pretty) (poly + i, ctx);
bound += strlen(coeffstrs[i]);
nz++;
}
bound += nz * (5 + strlen(x) + (slong) (ceil(log10(len))));
str = flint_malloc(bound);
off = 0;
i = len - 1;
if (TEMPLATE(T, is_one) (poly + i, ctx))
{
}
else
off += flint_sprintf(str + off, "*(%s)", coeffstrs[i]);
if (i > 1)
off += flint_sprintf(str + off, "%s^%wd", x, i);
else
off += flint_sprintf(str + off, "%s", x);
for (--i; i > 0; --i)
{
if (TEMPLATE(T, is_zero) (poly + i, ctx))
continue;
if (!TEMPLATE(T, is_one) (poly + i, ctx))
{
off += flint_sprintf(str + off, "+(%s)", coeffstrs[i]);
}
else
{
off += flint_sprintf(str + off, "+");
}
if (i > 1)
off += flint_sprintf(str + off, "*%s^%wd", x, i);
else
off += flint_sprintf(str + off, "*%s", x);
}
if (!TEMPLATE(T, is_zero) (poly + i, ctx))
{
off += flint_sprintf(str + off, "+(%s)", coeffstrs[i]);
}
for (i = 0; i < len; i++)
if (!TEMPLATE(T, is_zero) (poly + i, ctx))
{
flint_free(coeffstrs[i]);
}
flint_free(coeffstrs);
return str;
}
char *TEMPLATE(T, poly_get_str_pretty) (const TEMPLATE(T, poly_t) poly,
const char *x,
const TEMPLATE(T, ctx_t) ctx)
{
return _TEMPLATE(T, poly_get_str_pretty) (poly->coeffs, poly->length, x,
ctx);
}
#endif