1 files changed, 98 insertions, 0 deletions
diff --git a/mpfr/src/out_str.c b/mpfr/src/out_str.c
new file mode 100644
index 0000000000..c32dbe2b88
--- /dev/null
+++ b/mpfr/src/out_str.c
@@ -0,0 +1,98 @@
+/* mpfr_out_str -- output a floating-point number to a stream
+
+Copyright 1999, 2001, 2002, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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 3 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.LESSER.  If not, see
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+/* Warning! S should not contain "%". */
+#define OUT_STR_RET(S)                          \
+  do                                            \
+    {                                           \
+      int r;                                    \
+      r = fprintf (stream, (S));                \
+      return r < 0 ? 0 : r;                     \
+    }                                           \
+  while (0)
+
+size_t
+mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op,
+              mpfr_rnd_t rnd_mode)
+{
+  char *s, *s0;
+  size_t l;
+  mpfr_exp_t e;
+  int err;
+
+  MPFR_ASSERTN (base >= 2 && base <= 62);
+
+  /* when stream=NULL, output to stdout */
+  if (stream == NULL)
+    stream = stdout;
+
+  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (op)))
+    {
+      if (MPFR_IS_NAN (op))
+        OUT_STR_RET ("@NaN@");
+      else if (MPFR_IS_INF (op))
+        OUT_STR_RET (MPFR_IS_POS (op) ? "@Inf@" : "-@Inf@");
+      else
+        {
+          MPFR_ASSERTD (MPFR_IS_ZERO (op));
+          OUT_STR_RET (MPFR_IS_POS (op) ? "0" : "-0");
+        }
+    }
+
+  s = mpfr_get_str (NULL, &e, base, n_digits, op, rnd_mode);
+
+  s0 = s;
+  /* for op=3.1416 we have s = "31416" and e = 1 */
+
+  l = strlen (s) + 1; /* size of allocated block returned by mpfr_get_str
+                         - may be incorrect, as only an upper bound? */
+
+  /* outputs possible sign and significand */
+  err = (*s == '-' && fputc (*s++, stream) == EOF)
+    || fputc (*s++, stream) == EOF  /* leading digit */
+    || fputc ((unsigned char) MPFR_DECIMAL_POINT, stream) == EOF
+    || fputs (s, stream) == EOF;     /* trailing significand */
+  (*__gmp_free_func) (s0, l);
+  if (MPFR_UNLIKELY (err))
+    return 0;
+
+  e--;  /* due to the leading digit */
+
+  /* outputs exponent */
+  if (e)
+    {
+      int r;
+
+      MPFR_ASSERTN(e >= LONG_MIN);
+      MPFR_ASSERTN(e <= LONG_MAX);
+
+      r = fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), (long) e);
+      if (MPFR_UNLIKELY (r < 0))
+        return 0;
+
+      l += r;
+    }
+
+  return l;
+}