[tests/tsprintf.c] Fixed/simplified code with incorrect strncpy

usage (bug detected by gcc-snapshot 20180107-1 under Debian with
-Werror=stringop-truncation).
(merged changesets r12084-12085 from the trunk)

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/branches/4.0@12086 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 3 insertions, 6 deletions

diff --git a/tests/tsprintf.c b/tests/tsprintf.c
index 30038a712..24fed1167 100644
--- a/tests/tsprintf.c
+++ b/tests/tsprintf.c
@@ -88,14 +88,11 @@ check_sprintf (const char *expected, const char *fmt, mpfr_srcptr x)
     }
   if (n0 != n1)
     {
-      char format[1024];
       printf ("Error in mpfr_snprintf (s, %d, \"%s\", x) return value\n",
               randsize, fmt);
-      printf ("expected: %d\ngot:      %d\n", n0, n1);
-      strncpy (format, "x='", 1024);
-      strncpy (format + 3, fmt, 1021);
-      strncpy (format + 3 + strlen (fmt), "'\n", 1021 - strlen (fmt));
-      mpfr_printf (format, x);
+      printf ("expected: %d\ngot:      %d\nx='", n0, n1);
+      mpfr_printf (fmt, x);
+      printf ("'\n");
       exit (1);
     }
   if ((randsize > 1 && strncmp (expected, buffer, randsize - 1) != 0)