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author | markm <markm@FreeBSD.org> | 1995-11-12 14:40:41 +0000 |
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committer | markm <markm@FreeBSD.org> | 1995-11-12 14:40:41 +0000 |
commit | d938bb78837327b46dc34873a6eb60c002605808 (patch) | |
tree | d720c213b0c2f268c17d14276e809e876bd37dc8 /gnu/lib/libgmp/mpq_set_ui.c | |
parent | 7e662b2efdf7b11bed05bdd944746d7b7d0e56af (diff) | |
download | FreeBSD-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/mpq_set_ui.c')
-rw-r--r-- | gnu/lib/libgmp/mpq_set_ui.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/gnu/lib/libgmp/mpq_set_ui.c b/gnu/lib/libgmp/mpq_set_ui.c new file mode 100644 index 0000000..54b69ee --- /dev/null +++ b/gnu/lib/libgmp/mpq_set_ui.c @@ -0,0 +1,73 @@ +/* mpq_set_ui(dest,ulong_num,ulong_den) -- Set DEST to the retional number + ULONG_NUM/ULONG_DEN. + +Copyright (C) 1991 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" + +static unsigned long int +gcd (x, y) + unsigned long int x, y; +{ + for (;;) + { + x = x % y; + if (x == 0) + return y; + y = y % x; + if (y == 0) + return x; + } +} + +void +#ifdef __STDC__ +mpq_set_ui (MP_RAT *dest, unsigned long int num, unsigned long int den) +#else +mpq_set_ui (dest, num, den) + MP_RAT *dest; + unsigned long int num; + unsigned long int den; +#endif +{ + unsigned long int g; + + if (num == 0) + { + /* Canonicalize 0/n to 0/1. */ + den = 1; + dest->num.size = 0; + } + else + { + /* Remove any common factor in NUM and DEN. */ + /* Pass DEN as the second argument to gcd, in order to make the + gcd function divide by zero if DEN is zero. */ + g = gcd (num, den); + num /= g; + den /= g; + + dest->num.d[0] = num; + dest->num.size = 1; + } + + dest->den.d[0] = den; + dest->den.size = 1; +} |