64 lines
1.9 KiB
C
64 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) 2011, 2012 Sebastian Pancratz
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******************************************************************************/
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#include "padic.h"
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void padic_ctx_init(padic_ctx_t ctx, const fmpz_t p, slong min, slong max,
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enum padic_print_mode mode)
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{
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if (!(0 <= min && min <= max))
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{
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flint_printf("Exception (padic_ctx_init). Require 0 <= min <= max.");
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abort();
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}
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fmpz_init_set(ctx->p, p);
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ctx->min = min;
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ctx->max = max;
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ctx->pinv = (!COEFF_IS_MPZ(*p)) ? n_precompute_inverse(fmpz_get_ui(p)) : 0;
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if (max - min > 0)
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{
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slong i, len = max - min;
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ctx->pow = _fmpz_vec_init(len);
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fmpz_pow_ui(ctx->pow, p, ctx->min);
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for (i = 1; i < len; i++)
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fmpz_mul(ctx->pow + i, ctx->pow + (i - 1), p);
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}
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else
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{
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ctx->min = 0;
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ctx->max = 0;
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ctx->pow = NULL;
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}
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ctx->mode = mode;
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}
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