X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftest-vasnprintf-posix.c;h=bf125480ae58a86e97d0be59c86ce55e2406a5e8;hb=2c64312ecca19a60629cb929c1ae759109c772b5;hp=84da8b2b7cb3f15a899d8cbec9887652f669eb9c;hpb=e220635fc952c63b533873f2af39ec76aed4b4e3;p=gnulib.git

diff --git a/tests/test-vasnprintf-posix.c b/tests/test-vasnprintf-posix.c
index 84da8b2b7..bf125480a 100644
--- a/tests/test-vasnprintf-posix.c
+++ b/tests/test-vasnprintf-posix.c
@@ -48,10 +48,24 @@ static int
 have_minus_zero ()
 {
   static double plus_zero = 0.0;
-  static double minus_zero = -0.0;
+  double minus_zero = - plus_zero;
   return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
 }
 
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   So we use -zerod instead.  */
+double zerod = 0.0;
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zerol instead.
+   Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+   platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
+#if defined __hpux || defined __sgi
+long double minus_zerol = -LDBL_MIN * LDBL_MIN;
+#else
+long double minus_zerol = -0.0L;
+#endif
+
 /* Representation of an 80-bit 'long double' as an initializer for a sequence
    of 'unsigned int' words.  */
 #ifdef WORDS_BIGENDIAN
@@ -217,7 +231,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%a %d", -0.0, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%a %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
@@ -531,7 +545,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%La %d", -0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%La %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
@@ -1044,7 +1058,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%f %d", -0.0, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%f %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1189,6 +1203,26 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2f %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2f %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     size_t length;
     char *result =
@@ -1323,7 +1357,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Lf %d", -0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Lf %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1569,6 +1603,26 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2Lf %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2Lf %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   /* Test the support of the %F format directive.  */
 
   { /* A positive number.  */
@@ -1614,7 +1668,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%F %d", -0.0, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%F %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1687,6 +1741,26 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2F %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2F %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     size_t length;
     char *result =
@@ -1730,7 +1804,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%LF %d", -0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%LF %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1803,6 +1877,26 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2LF %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.2LF %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   /* Test the support of the %e format directive.  */
 
   { /* A positive number.  */
@@ -1951,7 +2045,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%e %d", -0.0, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%e %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000e+00 33") == 0
@@ -2116,12 +2210,35 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.4e %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "9.9995e+02 33") == 0
+	    || strcmp (result, "9.9995e+002 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.4e %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.0000e+03 33") == 0
+	    || strcmp (result, "1.0000e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     size_t length;
     char *result =
       my_asnprintf (NULL, &length, "%Le %d", 12.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.275000e+01 33") == 0);
+    ASSERT (strcmp (result, "1.275000e+01 33") == 0
+	    || strcmp (result, "1.275000e+001 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2131,7 +2248,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Le %d", 1234567.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.234567e+06 33") == 0);
+    ASSERT (strcmp (result, "1.234567e+06 33") == 0
+	    || strcmp (result, "1.234567e+006 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2220,8 +2338,16 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
 	size_t length;
 	char *result =
 	  my_asnprintf (NULL, &length, "%Le", data[k].value);
+	const char *expected = data[k].string;
 	ASSERT (result != NULL);
-	ASSERT (strcmp (result, data[k].string) == 0);
+	ASSERT (strcmp (result, expected) == 0
+		/* Some implementations produce exponents with 3 digits.  */
+		|| (strlen (result) == strlen (expected) + 1
+		    && memcmp (result, expected, strlen (expected) - 2) == 0
+		    && result[strlen (expected) - 2] == '0'
+		    && strcmp (result + strlen (expected) - 1,
+			       expected + strlen (expected) - 2)
+		       == 0));
 	ASSERT (length == strlen (result));
 	free (result);
       }
@@ -2232,7 +2358,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Le %d", -0.03125L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-3.125000e-02 33") == 0);
+    ASSERT (strcmp (result, "-3.125000e-02 33") == 0
+	    || strcmp (result, "-3.125000e-002 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2242,7 +2369,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Le %d", 0.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "0.000000e+00 33") == 0);
+    ASSERT (strcmp (result, "0.000000e+00 33") == 0
+	    || strcmp (result, "0.000000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2250,10 +2378,11 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Le %d", -0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
-      ASSERT (strcmp (result, "-0.000000e+00 33") == 0);
+      ASSERT (strcmp (result, "-0.000000e+00 33") == 0
+	      || strcmp (result, "-0.000000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2398,7 +2527,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%15Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "   1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "   1.750000e+00 33") == 0
+	    || strcmp (result, "  1.750000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2408,7 +2538,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%-15Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.750000e+00    33") == 0);
+    ASSERT (strcmp (result, "1.750000e+00    33") == 0
+	    || strcmp (result, "1.750000e+000   33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2418,7 +2549,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%+Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "+1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "+1.750000e+00 33") == 0
+	    || strcmp (result, "+1.750000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2428,7 +2560,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "% Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, " 1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, " 1.750000e+00 33") == 0
+	    || strcmp (result, " 1.750000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2438,7 +2571,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%#Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "1.750000e+00 33") == 0
+	    || strcmp (result, "1.750000e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2448,7 +2582,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%#.Le %d", 1.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "2.e+00 33") == 0);
+    ASSERT (strcmp (result, "2.e+00 33") == 0
+	    || strcmp (result, "2.e+000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2458,7 +2593,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%#.Le %d", 9.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2468,7 +2604,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%015Le %d", 1234.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "0001.234000e+03 33") == 0);
+    ASSERT (strcmp (result, "0001.234000e+03 33") == 0
+	    || strcmp (result, "001.234000e+003 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2501,7 +2638,30 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%.Le %d", 1234.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.4Le %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "9.9995e+02 33") == 0
+	    || strcmp (result, "9.9995e+002 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.4Le %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.0000e+03 33") == 0
+	    || strcmp (result, "1.0000e+003 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2652,7 +2812,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%g %d", -0.0, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%g %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
@@ -2809,6 +2969,26 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.5g %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.5g %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     size_t length;
     char *result =
@@ -2824,7 +3004,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Lg %d", 1234567.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.23457e+06 33") == 0);
+    ASSERT (strcmp (result, "1.23457e+06 33") == 0
+	    || strcmp (result, "1.23457e+006 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -2913,8 +3094,17 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
 	size_t length;
 	char *result =
 	  my_asnprintf (NULL, &length, "%Lg", data[k].value);
+	const char *expected = data[k].string;
 	ASSERT (result != NULL);
-	ASSERT (strcmp (result, data[k].string) == 0);
+	ASSERT (strcmp (result, expected) == 0
+		/* Some implementations produce exponents with 3 digits.  */
+		|| (expected[strlen (expected) - 4] == 'e'
+		    && strlen (result) == strlen (expected) + 1
+		    && memcmp (result, expected, strlen (expected) - 2) == 0
+		    && result[strlen (expected) - 2] == '0'
+		    && strcmp (result + strlen (expected) - 1,
+			       expected + strlen (expected) - 2)
+		       == 0));
 	ASSERT (length == strlen (result));
 	free (result);
       }
@@ -2943,7 +3133,7 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* Negative zero.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Lg %d", -0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Lg %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
@@ -3151,7 +3341,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%#.Lg %d", 9.75L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -3194,7 +3385,28 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%.Lg %d", 1234.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with no rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.5Lg %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.5Lg %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -3287,6 +3499,19 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   {
     size_t length;
     char *result =
+      my_asnprintf (NULL, &length, "%.*d %d", 4000, 1234567, 99);
+    size_t i;
+    ASSERT (result != NULL);
+    for (i = 0; i < 4000 - 7; i++)
+      ASSERT (result[i] == '0');
+    ASSERT (strcmp (result + 4000 - 7, "1234567 99") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
       my_asnprintf (NULL, &length, "%.4000d %d", -1234567, 99);
     size_t i;
     ASSERT (result != NULL);