pqc/external/flint-2.4.3/perm.h

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#ifndef PERM_H
#define PERM_H
#undef ulong
#define ulong ulongxx /* interferes with system includes */
#include <stdlib.h>
#include <stdio.h>
#undef ulong
#include <gmp.h>
#define ulong mp_limb_t
#include "flint.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Memory management *********************************************************/
static __inline__ slong * _perm_init(slong n)
{
slong i, *vec;
vec = (slong *) flint_malloc(n * sizeof(slong));
if (!vec)
{
flint_printf("ERROR (_perm_init).\n\n");
abort();
}
for (i = 0; i < n; i++)
vec[i] = i;
return vec;
}
static __inline__ void _perm_clear(slong * vec)
{
flint_free(vec);
}
/* Assignment ****************************************************************/
static __inline__ slong _perm_equal(const slong *vec1, const slong *vec2, slong n)
{
slong i;
for (i = 0; i < n; i++)
if (vec1[i] != vec2[i])
return 0;
return 1;
}
static __inline__ void _perm_set(slong *res, const slong *vec, slong n)
{
slong i;
for (i = 0; i < n; i++)
res[i] = vec[i];
}
static __inline__ void _perm_set_one(slong *vec, slong n)
{
slong i;
for (i = 0; i < n; i++)
vec[i] = i;
}
static __inline__ void
_perm_inv(slong *res, const slong *vec, slong n)
{
slong i;
if (res == vec)
{
slong *t = (slong *) flint_malloc(n * sizeof(slong));
if (!t)
{
flint_printf("ERROR (_perm_inv).\n\n");
abort();
}
for (i = 0; i < n; i++)
t[i] = vec[i];
for (i = 0; i < n; i++)
res[t[i]] = i;
flint_free(t);
}
else
{
for (i = 0; i < n; i++)
res[vec[i]] = i;
}
}
/* Composition ***************************************************************/
static __inline__ void
_perm_compose(slong *res, const slong *vec1, const slong *vec2, slong n)
{
slong i;
if (res == vec1)
{
slong *t = (slong *) flint_malloc(n * sizeof(slong));
for (i = 0; i < n; i++)
t[i] = vec1[i];
for (i = 0; i < n; i++)
res[i] = t[vec2[i]];
flint_free(t);
}
else
{
for (i = 0; i < n; i++)
res[i] = vec1[vec2[i]];
}
}
/* Randomisation *************************************************************/
int _perm_randtest(slong * vec, slong n, flint_rand_t state);
/* Parity ********************************************************************/
int _perm_parity(const slong * vec, slong n);
/* Input and output **********************************************************/
static __inline__ int _long_vec_print(const slong * vec, slong len)
{
slong i;
flint_printf("%wd", len);
if (len > 0)
{
flint_printf(" ");
for (i = 0; i < len; i++)
flint_printf(" %wd", vec[i]);
}
return 1;
}
static __inline__ int _perm_print(const slong * vec, slong n)
{
slong i;
flint_printf("%wd", n);
if (n > 0)
{
flint_printf(" ");
for (i = 0; i < n; i++)
flint_printf(" %wd", vec[i]);
}
return 1;
}
#ifdef __cplusplus
}
#endif
#endif