Coverage Report

Created: 2024-11-21 07:03

/src/libgmp/mpz/mod.c
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/* mpz_mod -- The mathematical mod function.
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Copyright 1991, 1993-1996, 2001, 2002, 2005, 2010, 2012 Free Software
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Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of either:
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  * the GNU Lesser General Public License as published by the Free
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    Software Foundation; either version 3 of the License, or (at your
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    option) any later version.
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or
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  * the GNU General Public License as published by the Free Software
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    Foundation; either version 2 of the License, or (at your option) any
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    later version.
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or both in parallel, as here.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library.  If not,
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see https://www.gnu.org/licenses/.  */
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#include "gmp-impl.h"
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void
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mpz_mod (mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor)
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{
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  mp_size_t rn, bn;
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  mpz_t temp_divisor;
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  TMP_DECL;
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  TMP_MARK;
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  bn = ABSIZ(divisor);
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  /* We need the original value of the divisor after the remainder has been
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     preliminary calculated.  We have to copy it to temporary space if it's
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     the same variable as REM.  */
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  if (rem == divisor)
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    {
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      PTR(temp_divisor) = TMP_ALLOC_LIMBS (bn);
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      MPN_COPY (PTR(temp_divisor), PTR(divisor), bn);
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    }
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  else
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    {
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      PTR(temp_divisor) = PTR(divisor);
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    }
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  SIZ(temp_divisor) = bn;
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  divisor = temp_divisor;
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  mpz_tdiv_r (rem, dividend, divisor);
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  rn = SIZ (rem);
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  if (rn < 0)
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    mpz_add (rem, rem, divisor);
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  TMP_FREE;
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}