linux/lib/crypto/mpi/mpi-bit.c

/* mpi-bit.c  -  MPI bit level functions
 * Copyright (C) 1998, 1999 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG 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.
 *
 * GnuPG 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include "mpi-internal.h"
#include "longlong.h"

#define A_LIMB_1 …

/****************
 * Sometimes we have MSL (most significant limbs) which are 0;
 * this is for some reasons not good, so this function removes them.
 */
void mpi_normalize(MPI a)
{ … }
EXPORT_SYMBOL_GPL(…);

/****************
 * Return the number of bits in A.
 */
unsigned mpi_get_nbits(MPI a)
{ … }
EXPORT_SYMBOL_GPL(…);

/****************
 * Test whether bit N is set.
 */
int mpi_test_bit(MPI a, unsigned int n)
{ … }
EXPORT_SYMBOL_GPL(…);

/****************
 * Set bit N of A.
 */
void mpi_set_bit(MPI a, unsigned int n)
{ … }

/****************
 * Set bit N of A. and clear all bits above
 */
void mpi_set_highbit(MPI a, unsigned int n)
{ … }
EXPORT_SYMBOL_GPL(…);

/****************
 * clear bit N of A and all bits above
 */
void mpi_clear_highbit(MPI a, unsigned int n)
{ … }

/****************
 * Clear bit N of A.
 */
void mpi_clear_bit(MPI a, unsigned int n)
{ … }
EXPORT_SYMBOL_GPL(…);


/****************
 * Shift A by COUNT limbs to the right
 * This is used only within the MPI library
 */
void mpi_rshift_limbs(MPI a, unsigned int count)
{ … }

/*
 * Shift A by N bits to the right.
 */
void mpi_rshift(MPI x, MPI a, unsigned int n)
{ … }
EXPORT_SYMBOL_GPL(…);

/****************
 * Shift A by COUNT limbs to the left
 * This is used only within the MPI library
 */
void mpi_lshift_limbs(MPI a, unsigned int count)
{ … }

/*
 * Shift A by N bits to the left.
 */
void mpi_lshift(MPI x, MPI a, unsigned int n)
{ … }