Imported gcc-4.4.3

[msp430-gcc.git] / mpfr / out_str.c

diff --git a/mpfr/out_str.c b/mpfr/out_str.c
new file mode 100644 (file)
index 0000000..570dff0
--- /dev/null
+++ b/mpfr/out_str.c
@@ -0,0 +1,100 @@
+/* mpfr_out_str -- output a floating-point number to a stream
+
+Copyright 1999, 2001, 2002, 2004, 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 <string.h>
+
+#include "mpfr-impl.h"
+
+size_t
+mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op,
+              mp_rnd_t rnd_mode)
+{
+  char *s, *s0;
+  size_t l;
+  mp_exp_t e;
+
+  MPFR_ASSERTN (base >= 2 && base <= 36);
+
+  /* when stream=NULL, output to stdout */
+  if (stream == NULL)
+    stream = stdout;
+
+  if (MPFR_IS_NAN(op))
+    {
+      fprintf (stream, "@NaN@");
+      return 3;
+    }
+
+  if (MPFR_IS_INF(op))
+    {
+      if (MPFR_SIGN(op) > 0)
+        {
+          fprintf (stream, "@Inf@");
+          return 3;
+        }
+      else
+        {
+          fprintf (stream, "-@Inf@");
+          return 4;
+        }
+    }
+
+  if (MPFR_IS_ZERO(op))
+    {
+      if (MPFR_SIGN(op) > 0)
+        {
+          fprintf(stream, "0");
+          return 1;
+        }
+      else
+        {
+          fprintf(stream, "-0");
+          return 2;
+        }
+    }
+
+  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? */
+  if (*s == '-')
+    fputc (*s++, stream);
+
+  /* outputs mantissa */
+  fputc (*s++, stream); e--; /* leading digit */
+  fputc ((unsigned char) MPFR_DECIMAL_POINT, stream);
+  fputs (s, stream);         /* rest of mantissa */
+  (*__gmp_free_func) (s0, l);
+
+  /* outputs exponent */
+  if (e)
+    {
+      MPFR_ASSERTN(e >= LONG_MIN);
+      MPFR_ASSERTN(e <= LONG_MAX);
+      l += fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), (long) e);
+    }
+
+  return l;
+}