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camellia128-meta.c

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  • gmp-glue.c 6.84 KiB
    /* gmp-glue.c
    
       Copyright (C) 2013 Niels Möller
       Copyright (C) 2013 Red Hat
    
       This file is part of GNU Nettle.
    
       GNU Nettle is free software: you can redistribute it and/or
       modify it under the terms of either:
    
         * the GNU Lesser General Public License as published by the Free
           Software Foundation; either version 3 of the License, or (at your
           option) any later version.
    
       or
    
         * 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.
    
       or both in parallel, as here.
    
       GNU Nettle 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 copies of the GNU General Public License and
       the GNU Lesser General Public License along with this program.  If
       not, see http://www.gnu.org/licenses/.
    */
    
    #if HAVE_CONFIG_H
    # include "config.h"
    #endif
    
    #include <assert.h>
    #include <stdlib.h>
    
    #include "gmp-glue.h"
    
    #if !GMP_HAVE_mpz_limbs_read
    
    /* This implementation tries to make a minimal use of GMP internals.
       We access and _mp_size and _mp_d, but not _mp_alloc. */
    
    /* Use macros compatible with gmp-impl.h. */
    #define ABS(x) ((x) >= 0 ? (x) : -(x))
    #define PTR(x) ((x)->_mp_d)
    #define SIZ(x) ((x)->_mp_size)
    #define ABSIZ(x) ABS (SIZ (x))
    
    #define MPN_NORMALIZE(xp, xn) do {		\
        while ( (xn) > 0 && (xp)[xn-1] == 0)	\
          (xn)--;					\
      }  while (0)
    
    /* NOTE: Makes an unnecessary realloc if allocation is already large
       enough, but looking at _mp_alloc may break in future GMP
       versions. */
    #define MPZ_REALLOC(x, n) \
      (ABSIZ(x) >= (n) ? PTR(x) : (_mpz_realloc ((x),(n)), PTR (x)))
    
    #define MPZ_NEWALLOC MPZ_REALLOC
    
    /* Read access to mpz numbers. */
    
    /* Return limb pointer, for read-only operations. Use mpz_size to get
       the number of limbs. */
    const mp_limb_t *