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diff --git a/mpfr/set_str.c b/mpfr/set_str.c
new file mode 100644
index 00000000..ff5eaace
--- /dev/null
+++ b/mpfr/set_str.c
@@ -0,0 +1,42 @@
+/* mpfr_set_str -- set a floating-point number from a string
+
+Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+int
+mpfr_set_str (mpfr_t x, const char *str, int base, mp_rnd_t rnd)
+{
+  char *p;
+
+  if (MPFR_UNLIKELY (*str == 0))
+    return -1;
+  mpfr_strtofr (x, str, &p, base, rnd);
+  return (*p == 0) ? 0 : -1;
+}
+
+
+int
+mpfr_init_set_str (mpfr_ptr x, const char *str, int base, mp_rnd_t rnd)
+{
+  mpfr_init (x);
+  return mpfr_set_str (x, str, base, rnd);
+}