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y ! /* SPDX-License-Identifier: GPL-2.0-or-later */
/* mpi.h - Multi Precision Integers
* Copyright (C) 1994, 1996, 1998, 1999,
* 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GNUPG.
*
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
* The GNU MP Library itself is published under the LGPL;
* however I decided to publish this code under the plain GPL.
*/
#ifndef G10_MPI_H
#define G10_MPI_H
#include
#include
#define BYTES_PER_MPI_LIMB (BITS_PER_LONG / 8)
#define BITS_PER_MPI_LIMB BITS_PER_LONG
typedef unsigned long int mpi_limb_t;
typedef signed long int mpi_limb_signed_t;
struct gcry_mpi {
int alloced; /* array size (# of allocated limbs) */
int nlimbs; /* number of valid limbs */
int nbits; /* the real number of valid bits (info only) */
int sign; /* indicates a negative number */
unsigned flags; /* bit 0: array must be allocated in secure memory space */
/* bit 1: not used */
/* bit 2: the limb is a pointer to some m_alloced data */
mpi_limb_t *d; /* array with the limbs */
};
typedef struct gcry_mpi *MPI;
#define mpi_get_nlimbs(a) ((a)->nlimbs)
#define mpi_has_sign(a) ((a)->sign)
/*-- mpiutil.c --*/
MPI mpi_alloc(unsigned nlimbs);
void mpi_clear(MPI a);
void mpi_free(MPI a);
int mpi_resize(MPI a, unsigned nlimbs);
static inline MPI mpi_new(unsigned int nbits)
{
return mpi_alloc((nbits + BITS_PER_MPI_LIMB - 1) / BITS_PER_MPI_LIMB);
}
MPI mpi_copy(MPI a);
MPI mpi_alloc_like(MPI a);
void mpi_snatch(MPI w, MPI u);
MPI mpi_set(MPI w,