added cast to "unsigned long" for ai = ABS(i)

moved mpfr_set_ui to separate file


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@989 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 68 insertions, 0 deletions

diff --git a/set_ui.c b/set_ui.c
new file mode 100644
index 000000000..9fd88dd98
--- /dev/null
+++ b/set_ui.c
@@ -0,0 +1,68 @@
+/* mpfr_set_ui -- set a MPFR number from a machine unsigned integer
+
+Copyright (C) 1999-2001 Free Software Foundation.
+
+This file is part of the MPFR Library.
+
+The MPFR 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 MPFR 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 MPFR 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 <stdio.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+#include "mpfr.h"
+#include "mpfr-impl.h"
+
+void
+#if __STDC__
+mpfr_set_ui (mpfr_ptr x, unsigned long int i, mp_rnd_t rnd_mode)
+#else
+mpfr_set_ui (x, i, rnd_mode)
+     mpfr_ptr x;
+     unsigned long int i;
+     mp_rnd_t rnd_mode;
+#endif  
+{
+  unsigned int xn, cnt; mp_limb_t *xp;
+
+  MPFR_CLEAR_FLAGS(x);
+  if (i==0) { MPFR_SET_ZERO(x); return; }
+  xn = (MPFR_PREC(x)-1)/BITS_PER_MP_LIMB;
+  count_leading_zeros(cnt, (mp_limb_t) i); 
+
+  xp = MPFR_MANT(x);
+  xp[xn] = ((mp_limb_t) i) << cnt; 
+  /* don't forget to put zero in lower limbs */
+  MPN_ZERO(xp, xn);
+
+  MPFR_EXP(x) = BITS_PER_MP_LIMB - cnt;
+
+  /* round if MPFR_PREC(x) smaller than length of i */
+  if (MPFR_PREC(x) < BITS_PER_MP_LIMB-cnt) {
+    cnt = mpfr_round_raw(xp+xn, xp+xn, BITS_PER_MP_LIMB-cnt, 0, MPFR_PREC(x), 
+			 rnd_mode);
+    if (cnt) { /* special case 1.000...000 */
+      MPFR_EXP(x)++;
+      xp[xn] = ((mp_limb_t) 1) << (BITS_PER_MP_LIMB-1);
+    }
+  }
+
+  /* warning: don't change the precision of x! */
+  if (MPFR_SIGN(x) < 0) MPFR_CHANGE_SIGN(x);
+
+  return; 
+}
+