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authormarkm <markm@FreeBSD.org>1995-11-12 14:40:41 +0000
committermarkm <markm@FreeBSD.org>1995-11-12 14:40:41 +0000
commitd938bb78837327b46dc34873a6eb60c002605808 (patch)
treed720c213b0c2f268c17d14276e809e876bd37dc8 /gnu/lib/libgmp/mpz_div_ui.c
parent7e662b2efdf7b11bed05bdd944746d7b7d0e56af (diff)
downloadFreeBSD-src-d938bb78837327b46dc34873a6eb60c002605808.zip
FreeBSD-src-d938bb78837327b46dc34873a6eb60c002605808.tar.gz
GNU MP (Multiprecision) library. This is needed by secure RPC (being
done by Bill Paul) and various other BSD programs. Obtained from:FSF
Diffstat (limited to 'gnu/lib/libgmp/mpz_div_ui.c')
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1 files changed, 65 insertions, 0 deletions
diff --git a/gnu/lib/libgmp/mpz_div_ui.c b/gnu/lib/libgmp/mpz_div_ui.c
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+/* mpz_div_ui(quot, dividend, divisor_limb)
+ -- Divide DIVIDEND by DIVISOR_LIMB and store the result in QUOT.
+
+Copyright (C) 1991, 1992 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 General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+
+void
+#ifdef __STDC__
+mpz_div_ui (MP_INT *quot, const MP_INT *dividend, unsigned long int divisor_limb)
+#else
+mpz_div_ui (quot, dividend, divisor_limb)
+ MP_INT *quot;
+ const MP_INT *dividend;
+ unsigned long int divisor_limb;
+#endif
+{
+ mp_size sign_dividend;
+ mp_size dividend_size, quot_size;
+ mp_ptr dividend_ptr, quot_ptr;
+
+ sign_dividend = dividend->size;
+ dividend_size = ABS (dividend->size);
+
+ if (dividend_size == 0)
+ {
+ quot->size = 0;
+ return;
+ }
+
+ /* No need for temporary allocation and copying if QUOT == DIVIDEND as
+ the divisor is just one limb, and thus no intermediate remainders
+ need to be stored. */
+
+ if (quot->alloc < dividend_size)
+ _mpz_realloc (quot, dividend_size);
+
+ quot_ptr = quot->d;
+ dividend_ptr = dividend->d;
+
+ mpn_divmod_1 (quot_ptr, dividend_ptr, dividend_size, divisor_limb);
+
+ /* The quotient is DIVIDEND_SIZE limbs, but the most significant
+ might be zero. Set QUOT_SIZE properly. */
+ quot_size = dividend_size - (quot_ptr[dividend_size - 1] == 0);
+ quot->size = sign_dividend >= 0 ? quot_size : -quot_size;
+}
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