1 files changed, 62 insertions, 0 deletions
diff --git a/mpfr/set_prec.c b/mpfr/set_prec.c
new file mode 100644
index 000000000..d85eac3c3
--- /dev/null
+++ b/mpfr/set_prec.c
@@ -0,0 +1,62 @@
+/* mpfr_set_prec -- reset the precision of a floating-point number
+
+Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
+
+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 "mpfr.h"
+
+void
+#if __STDC__
+mpfr_set_prec (mpfr_t x, unsigned long int p)
+#else
+mpfr_set_prec (x, p)
+     mpfr_t x;
+     unsigned long int p;
+#endif
+{
+  unsigned long xsize;
+
+  if (p==0) {
+    printf("*** cannot set precision to 0 bits\n"); exit(1);
+  }
+
+  xsize = (p - 1)/BITS_PER_MP_LIMB + 1; /* new limb size */
+
+  if (xsize > ABSSIZE(x)) {
+    x -> _mp_d = (mp_ptr) (*_mp_reallocate_func) 
+      (x -> _mp_d, ABSSIZE(x)*BYTES_PER_MP_LIMB, xsize * BYTES_PER_MP_LIMB);
+    SIZE(x) = xsize; /* new number of allocated limbs */
+  }
+
+  x -> _mp_prec = p;
+}
+
+unsigned long int
+#if __STDC__
+mpfr_get_prec (mpfr_t x)
+#else
+mpfr_get_prec (x)
+     mpfr_t x;
+#endif
+{
+  return x -> _mp_prec;
+}