Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpz / set_f.c

diff --git a/rts/gmp/mpz/set_f.c b/rts/gmp/mpz/set_f.c
new file mode 100644 (file)
index 0000000..2273953
--- /dev/null
+++ b/rts/gmp/mpz/set_f.c
@@ -0,0 +1,64 @@
+/* mpz_set_f (dest_integer, src_float) -- Assign DEST_INTEGER from SRC_FLOAT.
+
+Copyright (C) 1996 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 Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP 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 "gmp.h"
+#include "gmp-impl.h"
+
+void
+#if __STDC__
+mpz_set_f (mpz_ptr w, mpf_srcptr u)
+#else
+mpz_set_f (w, u)
+     mpz_ptr w;
+     mpf_srcptr u;
+#endif
+{
+  mp_ptr wp, up;
+  mp_size_t usize, size;
+  mp_exp_t exp;
+
+  usize = SIZ (u);
+  size = ABS (usize);
+  exp = EXP (u);
+
+  if (w->_mp_alloc < exp)
+    _mpz_realloc (w, exp);
+
+  wp = w->_mp_d;
+  up = u->_mp_d;
+
+  if (exp <= 0)
+    {
+      SIZ (w) = 0;
+      return;
+    }
+  if (exp < size)
+    {
+      MPN_COPY (wp, up + size - exp, exp);
+    }
+  else
+    {
+      MPN_ZERO (wp, exp - size);
+      MPN_COPY (wp + exp - size, up, size);
+    }
+
+  w->_mp_size = usize >= 0 ? exp : -exp;
+}