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-rw-r--r--Build/source/libs/gmp/gmp-6.0.0/mpf/ceilfloor.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpf/ceilfloor.c b/Build/source/libs/gmp/gmp-6.0.0/mpf/ceilfloor.c
new file mode 100644
index 00000000000..302e2b8ae5a
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpf/ceilfloor.c
@@ -0,0 +1,126 @@
+/* mpf_ceil, mpf_floor -- round an mpf to an integer.
+
+Copyright 2001, 2004, 2012 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 either:
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your
+ option) any later version.
+
+or
+
+ * the GNU General Public License as published by the Free Software
+ Foundation; either version 2 of the License, or (at your option) any
+ later version.
+
+or both in parallel, as here.
+
+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 copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+
+/* dir==1 for ceil, dir==-1 for floor
+
+ Notice the use of prec+1 ensures mpf_ceil and mpf_floor are equivalent to
+ mpf_set if u is already an integer. */
+
+static void __gmpf_ceil_or_floor (REGPARM_2_1 (mpf_ptr, mpf_srcptr, int)) REGPARM_ATTR (1);
+#define mpf_ceil_or_floor(r,u,dir) __gmpf_ceil_or_floor (REGPARM_2_1 (r, u, dir))
+
+REGPARM_ATTR (1) static void
+mpf_ceil_or_floor (mpf_ptr r, mpf_srcptr u, int dir)
+{
+ mp_ptr rp, up, p;
+ mp_size_t size, asize, prec;
+ mp_exp_t exp;
+
+ size = SIZ(u);
+ if (size == 0)
+ {
+ zero:
+ SIZ(r) = 0;
+ EXP(r) = 0;
+ return;
+ }
+
+ rp = PTR(r);
+ exp = EXP(u);
+ if (exp <= 0)
+ {
+ /* u is only a fraction */
+ if ((size ^ dir) < 0)
+ goto zero;
+ rp[0] = 1;
+ EXP(r) = 1;
+ SIZ(r) = dir;
+ return;
+ }
+ EXP(r) = exp;
+
+ up = PTR(u);
+ asize = ABS (size);
+ up += asize;
+
+ /* skip fraction part of u */
+ asize = MIN (asize, exp);
+
+ /* don't lose precision in the copy */
+ prec = PREC (r) + 1;
+
+ /* skip excess over target precision */
+ asize = MIN (asize, prec);
+
+ up -= asize;
+
+ if ((size ^ dir) >= 0)
+ {
+ /* rounding direction matches sign, must increment if ignored part is
+ non-zero */
+ for (p = PTR(u); p != up; p++)
+ {
+ if (*p != 0)
+ {
+ if (mpn_add_1 (rp, up, asize, CNST_LIMB(1)))
+ {
+ /* was all 0xFF..FFs, which have become zeros, giving just
+ a carry */
+ rp[0] = 1;
+ asize = 1;
+ EXP(r)++;
+ }
+ SIZ(r) = (size >= 0 ? asize : -asize);
+ return;
+ }
+ }
+ }
+
+ SIZ(r) = (size >= 0 ? asize : -asize);
+ if (rp != up)
+ MPN_COPY_INCR (rp, up, asize);
+}
+
+
+void
+mpf_ceil (mpf_ptr r, mpf_srcptr u)
+{
+ mpf_ceil_or_floor (r, u, 1);
+}
+
+void
+mpf_floor (mpf_ptr r, mpf_srcptr u)
+{
+ mpf_ceil_or_floor (r, u, -1);
+}