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/*
Copyright (C) 2017 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.h"
#include "mpoly.h"
int mpoly_monomials_valid_test(ulong * exps, slong len,
flint_bitcnt_t bits, const mpoly_ctx_t mctx)
{
int ret = 1;
slong N, i, j;
fmpz * fields;
TMP_INIT;
if (!mctx->deg)
return ret;
TMP_START;
fields = TMP_ALLOC(mctx->nfields*sizeof(fmpz));
for (j = 0; j < mctx->nfields; j++)
fmpz_init(fields + j);
N = mpoly_words_per_exp(bits, mctx);
for (i = 0; i < len; i++)
{
mpoly_unpack_vec_fmpz(fields, exps + i*N, bits, mctx->nfields, 1);
for (j = 0; j < mctx->nvars; j++)
{
fmpz_sub(fields + mctx->nvars, fields + mctx->nvars, fields + j);
}
if (!fmpz_is_zero(fields + mctx->nvars))
{
ret = 0;
break;
}
}
for (j = 0; j < mctx->nfields; j++)
fmpz_clear(fields + j);
TMP_END;
return ret;
}