Add a real function for mpfr_sgn (not a call to mpfr_cmp_ui_2exp).

Add a test for mpfr_sgn.
Change the proto of mpfr_add1 and mpfr_sub1 by removing the last arg.
Simplify the logic of the sign in mpfr_sub1.
Tiny speed up for cmp/set/sqrt.
mpfr-impl auto include all the needed local header files (gmp, gmp-impl, mpfr).


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2534 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 129 insertions, 0 deletions

diff --git a/tests/tsgn.c b/tests/tsgn.c
new file mode 100644
index 000000000..dd64cf35b
--- /dev/null
+++ b/tests/tsgn.c
@@ -0,0 +1,129 @@
+/* tsgn -- Test for the sign of a floating point number.
+
+Copyright 2003 Free Software Foundation.
+Contributed by the Spaces project, INRIA Lorraine.
+
+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 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 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 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 <stdlib.h>
+#include <float.h>
+#include <time.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "mpfr.h"
+#include "mpfr-impl.h"
+#include "mpfr-test.h"
+
+static void
+check_special(void)
+{
+  mpfr_t x;
+  int ret = 0;
+
+  mpfr_init(x);
+  MPFR_SET_ZERO(x);
+  if (mpfr_sgn(x) != 0)
+    {
+      printf("Sgn error for 0.\n");
+      ret = 1;
+    }
+  MPFR_SET_NAN(x);
+  if (mpfr_sgn(x) != 0)
+    {
+      printf("Sgn error for NAN.\n");
+      ret = 1;
+    }
+  MPFR_SET_INF(x);
+  MPFR_SET_POS(x);
+  if (mpfr_sgn(x) != 1)
+    {
+      printf("Sgn error for +Inf.\n");
+      ret = 1;
+    }
+  MPFR_SET_INF(x);
+  MPFR_SET_NEG(x);
+  if (mpfr_sgn(x) != -1)
+    {
+      printf("Sgn error for -Inf.\n");
+      ret = 1;
+    }
+  mpfr_clear(x);
+  if (ret)
+    exit(ret);
+}
+
+static void
+check_sgn(void)
+{
+  mpfr_t x;
+  int i, s1, s2;
+
+  mpfr_init(x);
+  for(i = 0 ; i < 100 ; i++)
+    {
+      mpfr_random(x);
+      if (i&1)
+	{
+	  MPFR_SET_POS(x);
+	  s2 = 1;
+	}
+      else
+	{
+	  MPFR_SET_NEG(x);
+	  s2 = -1;
+	}
+      s1 = mpfr_sgn(x);
+      if (s1 < -1 || s1 > 1)
+	{
+	  printf("Error for sgn: out of range.\n");
+	  goto lexit;
+	}
+      else if (MPFR_IS_NAN(x) || MPFR_IS_ZERO(x))
+	{
+	  if (s1 != 0)
+	    {
+	      printf("Error for sgn: Nan or Zero should return 0.\n");
+	      goto lexit;
+	    }
+	}
+      else if (s1 != s2)
+	{
+	  printf("Error for sgn. Return %d instead of %d.\n", s1, s2);
+	  goto lexit;
+	}
+    }
+  mpfr_clear(x);
+  return;
+
+ lexit:
+  mpfr_clear(x);
+  exit(1);
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  check_special ();
+  check_sgn ();
+
+  tests_end_mpfr ();
+  return 0;
+}