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/*
Copyright (C) 2018 Daniel Schultz
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz_mpoly.h"
int fmpz_mpoly_pow_ui(fmpz_mpoly_t A, const fmpz_mpoly_t B,
ulong k, const fmpz_mpoly_ctx_t ctx)
{
if (B->length == 0)
{
fmpz_mpoly_set_ui(A, k == 0, ctx);
return 1;
}
else if (k <= 2)
{
if (k == 2)
{
fmpz_mpoly_mul(A, B, B, ctx);
}
else if (k == 1)
{
fmpz_mpoly_set(A, B, ctx);
}
else
{
fmpz_mpoly_one(A, ctx);
}
return 1;
}
else
{
ulong limit = (ulong)(WORD_MAX)/(ulong)(2*sizeof(fmpz));
if (B->length > 1 && k > limit/(ulong)(B->length - 1))
return 0;
fmpz_mpoly_pow_fps(A, B, k, ctx);
return 1;
}
}