69 lines
1.9 KiB
C
69 lines
1.9 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) 2012 Sebastian Pancratz
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******************************************************************************/
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#include "padic_poly.h"
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int _padic_poly_is_reduced(const fmpz *op, slong val, slong len, slong N,
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const padic_ctx_t ctx)
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{
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slong w;
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if (len == 0)
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{
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return (val == 0);
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}
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w = _fmpz_vec_ord_p(op, len, ctx->p);
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if (w != 0 || val >= N)
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{
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return 0;
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}
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{
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fmpz_t pow;
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int r, alloc;
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slong i;
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alloc = _padic_ctx_pow_ui(pow, N - val, ctx);
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r = 1;
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for (i = 0; (i < len) && (r); i++)
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if (fmpz_sgn(op + i) < 0 || fmpz_cmp(op + i, pow) >= 0)
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r = 0;
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if (alloc)
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fmpz_clear(pow);
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return r;
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}
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}
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int padic_poly_is_reduced(const padic_poly_t op, const padic_ctx_t ctx)
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{
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return _padic_poly_is_reduced(op->coeffs, op->val, op->length, op->N, ctx);
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}
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