196 lines
4.2 KiB
C
196 lines
4.2 KiB
C
/*=============================================================================
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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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#ifndef PERM_H
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#define PERM_H
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#undef ulong
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#define ulong ulongxx /* interferes with system includes */
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#include <stdlib.h>
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#include <stdio.h>
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#undef ulong
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#include <gmp.h>
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#define ulong mp_limb_t
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#include "flint.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Memory management *********************************************************/
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static __inline__ slong * _perm_init(slong n)
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{
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slong i, *vec;
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vec = (slong *) flint_malloc(n * sizeof(slong));
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if (!vec)
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{
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flint_printf("ERROR (_perm_init).\n\n");
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abort();
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}
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for (i = 0; i < n; i++)
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vec[i] = i;
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return vec;
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}
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static __inline__ void _perm_clear(slong * vec)
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{
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flint_free(vec);
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}
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/* Assignment ****************************************************************/
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static __inline__ slong _perm_equal(const slong *vec1, const slong *vec2, slong n)
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{
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slong i;
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for (i = 0; i < n; i++)
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if (vec1[i] != vec2[i])
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return 0;
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return 1;
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}
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static __inline__ void _perm_set(slong *res, const slong *vec, slong n)
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{
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slong i;
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for (i = 0; i < n; i++)
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res[i] = vec[i];
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}
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static __inline__ void _perm_set_one(slong *vec, slong n)
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{
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slong i;
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for (i = 0; i < n; i++)
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vec[i] = i;
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}
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static __inline__ void
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_perm_inv(slong *res, const slong *vec, slong n)
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{
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slong i;
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if (res == vec)
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{
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slong *t = (slong *) flint_malloc(n * sizeof(slong));
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if (!t)
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{
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flint_printf("ERROR (_perm_inv).\n\n");
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abort();
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}
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for (i = 0; i < n; i++)
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t[i] = vec[i];
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for (i = 0; i < n; i++)
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res[t[i]] = i;
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flint_free(t);
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}
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else
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{
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for (i = 0; i < n; i++)
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res[vec[i]] = i;
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}
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}
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/* Composition ***************************************************************/
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static __inline__ void
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_perm_compose(slong *res, const slong *vec1, const slong *vec2, slong n)
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{
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slong i;
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if (res == vec1)
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{
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slong *t = (slong *) flint_malloc(n * sizeof(slong));
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for (i = 0; i < n; i++)
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t[i] = vec1[i];
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for (i = 0; i < n; i++)
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res[i] = t[vec2[i]];
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flint_free(t);
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}
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else
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{
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for (i = 0; i < n; i++)
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res[i] = vec1[vec2[i]];
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}
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}
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/* Randomisation *************************************************************/
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int _perm_randtest(slong * vec, slong n, flint_rand_t state);
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/* Parity ********************************************************************/
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int _perm_parity(const slong * vec, slong n);
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/* Input and output **********************************************************/
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static __inline__ int _long_vec_print(const slong * vec, slong len)
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{
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slong i;
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flint_printf("%wd", len);
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if (len > 0)
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{
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flint_printf(" ");
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for (i = 0; i < len; i++)
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flint_printf(" %wd", vec[i]);
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}
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return 1;
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}
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static __inline__ int _perm_print(const slong * vec, slong n)
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{
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slong i;
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flint_printf("%wd", n);
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if (n > 0)
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{
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flint_printf(" ");
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for (i = 0; i < n; i++)
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flint_printf(" %wd", vec[i]);
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}
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return 1;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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