aa9bc17601
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* mpz_cdiv_qr -- Division rounding the quotient towards +infinity. The
|
|
remainder gets the opposite sign as the denominator.
|
|
|
|
Copyright (C) 1994, 1995, 1996 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_cdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor)
|
|
#else
|
|
mpz_cdiv_qr (quot, rem, dividend, divisor)
|
|
mpz_ptr quot;
|
|
mpz_ptr rem;
|
|
mpz_srcptr dividend;
|
|
mpz_srcptr divisor;
|
|
#endif
|
|
{
|
|
mp_size_t divisor_size = divisor->_mp_size;
|
|
mpz_t temp_divisor; /* N.B.: lives until function returns! */
|
|
TMP_DECL (marker);
|
|
|
|
TMP_MARK (marker);
|
|
|
|
/* We need the original value of the divisor after the quotient and
|
|
remainder have been preliminary calculated. We have to copy it to
|
|
temporary space if it's the same variable as either QUOT or REM. */
|
|
if (quot == divisor || rem == divisor)
|
|
{
|
|
MPZ_TMP_INIT (temp_divisor, ABS (divisor_size));
|
|
mpz_set (temp_divisor, divisor);
|
|
divisor = temp_divisor;
|
|
}
|
|
|
|
mpz_tdiv_qr (quot, rem, dividend, divisor);
|
|
|
|
if ((divisor_size ^ dividend->_mp_size) >= 0 && rem->_mp_size != 0)
|
|
{
|
|
mpz_add_ui (quot, quot, 1L);
|
|
mpz_sub (rem, rem, divisor);
|
|
}
|
|
|
|
TMP_FREE (marker);
|
|
}
|