freebsd-dev/contrib/libgmp/mpz/realloc.c
Mark Murray aa9bc17601 Clean import of libgmp 2.0.2, with only the non-x86 bits removed.
BMakefiles and other bits will follow.

Requested by:	Andrey Chernov
Made world by:	Chuck Robey
1996-10-20 08:49:26 +00:00

53 lines
1.6 KiB
C

/* _mpz_realloc -- make the mpz_t have NEW_SIZE digits allocated.
Copyright (C) 1991, 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "gmp.h"
#include "gmp-impl.h"
void *
#if __STDC__
_mpz_realloc (mpz_ptr m, mp_size_t new_size)
#else
_mpz_realloc (m, new_size)
mpz_ptr m;
mp_size_t new_size;
#endif
{
/* Never allocate zero space. */
if (new_size == 0)
new_size = 1;
m->_mp_d = (mp_ptr) (*_mp_reallocate_func) (m->_mp_d,
m->_mp_alloc * BYTES_PER_MP_LIMB,
new_size * BYTES_PER_MP_LIMB);
m->_mp_alloc = new_size;
#if 0
/* This might break some code that reads the size field after
reallocation, in the case the reallocated destination and a
source argument are identical. */
if (ABS (m->_mp_size) > new_size)
m->_mp_size = 0;
#endif
return (void *) m->_mp_d;
}