70 lines
2.3 KiB
C
70 lines
2.3 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 Sebastian Pancratz
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******************************************************************************/
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#include "fmpz_mat.h"
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#include "padic_mat.h"
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void padic_mat_set_entry_padic(padic_mat_t rop, slong i, slong j,
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const padic_t op, const padic_ctx_t ctx)
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{
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if (padic_is_zero(op))
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{
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fmpz_zero(padic_mat_entry(rop, i, j));
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_padic_mat_canonicalise(rop, ctx);
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return;
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}
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if (padic_mat_val(rop) == padic_val(op))
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{
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fmpz_set(padic_mat_entry(rop, i, j), padic_unit(op));
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}
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else if (padic_mat_val(rop) < padic_val(op))
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{
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fmpz_t t;
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fmpz_init(t);
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fmpz_pow_ui(t, ctx->p, padic_val(op) - padic_mat_val(rop));
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fmpz_mul(padic_mat_entry(rop, i, j), padic_unit(op), t);
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fmpz_clear(t);
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_padic_mat_canonicalise(rop, ctx);
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}
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else /* rop->val > op->val */
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{
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fmpz_t pow;
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fmpz_init(pow);
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fmpz_pow_ui(pow, ctx->p, padic_mat_val(rop) - padic_val(op));
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_fmpz_vec_scalar_mul_fmpz(padic_mat(rop)->entries,
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padic_mat(rop)->entries,
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padic_mat(rop)->r * padic_mat(rop)->c, pow);
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fmpz_clear(pow);
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fmpz_set(padic_mat_entry(rop, i, j), padic_unit(op));
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padic_mat_val(rop) = padic_val(op);
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}
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}
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