X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-snprintf-posix.h;h=262cdda558ec96e06b3c0f8567061125648f13ac;hb=f6fe750d033c40b403688dc3eee9dbff468aa8f3;hp=43329300b8976da270b17ca8035f7bcdf45ebc3f;hpb=48f8accaa33dfce46b63cc225a88d9421e4d2dc8;p=gnulib.git

diff --git a/tests/test-snprintf-posix.h b/tests/test-snprintf-posix.h
index 43329300b..262cdda55 100644
--- a/tests/test-snprintf-posix.h
+++ b/tests/test-snprintf-posix.h
@@ -1,5 +1,5 @@
 /* Test of POSIX compatible vsnprintf() and snprintf() functions.
-   Copyright (C) 2007-2008 Free Software Foundation, Inc.
+   Copyright (C) 2007-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -28,12 +28,24 @@ have_minus_zero ()
 }
 
 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
-   So we use -zero instead.  */
+   So we use -zerod instead.  */
 double zerod = 0.0;
 
-/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
-   So we use -zero instead.  */
-long double zerol = 0.0L;
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zerol instead.
+   IRIX cc can't put -0.0L into .data, but can compute at runtime.
+   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
+static long double
+compute_minus_zerol (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zerol compute_minus_zerol ()
+#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.  */
@@ -444,7 +456,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%La %d", -zerol, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%La %d", minus_zerol, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
     ASSERT (retval == strlen (result));
@@ -927,7 +939,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%10f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "  1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -936,7 +947,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%-10f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "1.750000   33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -945,7 +955,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%+f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "+1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -954,7 +963,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "% f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, " 1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -963,7 +971,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -972,7 +979,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#.f %d", 1.75, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "2. 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1152,7 +1158,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%Lf %d", -zerol, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%Lf %d", minus_zerol, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (retval == strlen (result));
@@ -1277,7 +1283,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%10Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "  1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1286,7 +1291,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%-10Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "1.750000   33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1295,7 +1299,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%+Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "+1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1304,7 +1307,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "% Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, " 1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1313,7 +1315,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "1.750000 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1322,7 +1323,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#.Lf %d", 1.75L, 33, 44, 55);
-    ASSERT (result != NULL);
     ASSERT (strcmp (result, "2. 33") == 0);
     ASSERT (retval == strlen (result));
   }
@@ -1525,7 +1525,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%LF %d", -zerol, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%LF %d", minus_zerol, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (retval == strlen (result));
@@ -1705,7 +1705,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
 	int retval =
 	  my_snprintf (result, sizeof (result), "%e", data[k].value);
 	const char *expected = data[k].string;
-	ASSERT (result != NULL);
 	ASSERT (strcmp (result, expected) == 0
 		/* Some implementations produce exponents with 3 digits.  */
 		|| (strlen (result) == strlen (expected) + 1
@@ -1896,7 +1895,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%Le %d", 12.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.275000e+01 33") == 0);
+    ASSERT (strcmp (result, "1.275000e+01 33") == 0
+	    || strcmp (result, "1.275000e+001 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -1904,7 +1904,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%Le %d", 1234567.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.234567e+06 33") == 0);
+    ASSERT (strcmp (result, "1.234567e+06 33") == 0
+	    || strcmp (result, "1.234567e+006 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -1992,7 +1993,15 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
 	char result[100];
 	int retval =
 	  my_snprintf (result, sizeof (result), "%Le", data[k].value);
-	ASSERT (strcmp (result, data[k].string) == 0);
+	const char *expected = data[k].string;
+	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 (retval == strlen (result));
       }
   }
@@ -2001,7 +2010,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%Le %d", -0.03125L, 33, 44, 55);
-    ASSERT (strcmp (result, "-3.125000e-02 33") == 0);
+    ASSERT (strcmp (result, "-3.125000e-02 33") == 0
+	    || strcmp (result, "-3.125000e-002 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2009,16 +2019,18 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%Le %d", 0.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "0.000000e+00 33") == 0);
+    ASSERT (strcmp (result, "0.000000e+00 33") == 0
+	    || strcmp (result, "0.000000e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%Le %d", -zerol, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%Le %d", minus_zerol, 33, 44, 55);
     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 (retval == strlen (result));
   }
 
@@ -2141,7 +2153,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%15Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "   1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "   1.750000e+00 33") == 0
+	    || strcmp (result, "  1.750000e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2149,7 +2162,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%-15Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.750000e+00    33") == 0);
+    ASSERT (strcmp (result, "1.750000e+00    33") == 0
+	    || strcmp (result, "1.750000e+000   33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2157,7 +2171,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%+Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "+1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "+1.750000e+00 33") == 0
+	    || strcmp (result, "+1.750000e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2165,7 +2180,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "% Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, " 1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, " 1.750000e+00 33") == 0
+	    || strcmp (result, " 1.750000e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2173,7 +2189,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.750000e+00 33") == 0);
+    ASSERT (strcmp (result, "1.750000e+00 33") == 0
+	    || strcmp (result, "1.750000e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2181,7 +2198,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#.Le %d", 1.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "2.e+00 33") == 0);
+    ASSERT (strcmp (result, "2.e+00 33") == 0
+	    || strcmp (result, "2.e+000 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2189,7 +2207,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#.Le %d", 9.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2197,7 +2216,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%015Le %d", 1234.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "0001.234000e+03 33") == 0);
+    ASSERT (strcmp (result, "0001.234000e+03 33") == 0
+	    || strcmp (result, "001.234000e+003 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2224,7 +2244,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%.Le %d", 1234.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2232,7 +2253,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%.4Le %d", 999.951L, 33, 44, 55);
-    ASSERT (strcmp (result, "9.9995e+02 33") == 0);
+    ASSERT (strcmp (result, "9.9995e+02 33") == 0
+	    || strcmp (result, "9.9995e+002 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2240,7 +2262,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%.4Le %d", 999.996L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.0000e+03 33") == 0);
+    ASSERT (strcmp (result, "1.0000e+03 33") == 0
+	    || strcmp (result, "1.0000e+003 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2535,7 +2558,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%Lg %d", 1234567.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.23457e+06 33") == 0);
+    ASSERT (strcmp (result, "1.23457e+06 33") == 0
+	    || strcmp (result, "1.23457e+006 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2623,7 +2647,16 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
 	char result[100];
 	int retval =
 	  my_snprintf (result, sizeof (result), "%Lg", data[k].value);
-	ASSERT (strcmp (result, data[k].string) == 0);
+	const char *expected = data[k].string;
+	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 (retval == strlen (result));
       }
   }
@@ -2647,7 +2680,7 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
   { /* Negative zero.  */
     char result[100];
     int retval =
-      my_snprintf (result, sizeof (result), "%Lg %d", -zerol, 33, 44, 55);
+      my_snprintf (result, sizeof (result), "%Lg %d", minus_zerol, 33, 44, 55);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
     ASSERT (retval == strlen (result));
@@ -2820,7 +2853,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%#.Lg %d", 9.75L, 33, 44, 55);
-    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2855,7 +2889,8 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     char result[100];
     int retval =
       my_snprintf (result, sizeof (result), "%.Lg %d", 1234.0L, 33, 44, 55);
-    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
     ASSERT (retval == strlen (result));
   }
 
@@ -2940,7 +2975,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.4000d %d", 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);
@@ -2952,7 +2986,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.*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);
@@ -2964,7 +2997,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.4000d %d", -1234567, 99);
     size_t i;
-    ASSERT (result != NULL);
     ASSERT (result[0] == '-');
     for (i = 0; i < 4000 - 7; i++)
       ASSERT (result[1 + i] == '0');
@@ -2977,7 +3009,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.4000u %d", 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);
@@ -2989,7 +3020,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.4000o %d", 1234567, 99);
     size_t i;
-    ASSERT (result != NULL);
     for (i = 0; i < 4000 - 7; i++)
       ASSERT (result[i] == '0');
     ASSERT (strcmp (result + 4000 - 7, "4553207 99") == 0);
@@ -3001,7 +3031,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%.4000x %d", 1234567, 99);
     size_t i;
-    ASSERT (result != NULL);
     for (i = 0; i < 4000 - 6; i++)
       ASSERT (result[i] == '0');
     ASSERT (strcmp (result + 4000 - 6, "12d687 99") == 0);
@@ -3013,7 +3042,6 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
     int retval =
       my_snprintf (result, sizeof (result), "%#.4000x %d", 1234567, 99);
     size_t i;
-    ASSERT (result != NULL);
     ASSERT (result[0] == '0');
     ASSERT (result[1] == 'x');
     for (i = 0; i < 4000 - 6; i++)
@@ -3032,9 +3060,54 @@ test_function (int (*my_snprintf) (char *, size_t, const char *, ...))
       input[i] = 'a' + ((1000000 / (i + 1)) % 26);
     input[i] = '\0';
     retval = my_snprintf (result, sizeof (result), "%.4000s %d", input, 99);
-    ASSERT (result != NULL);
     ASSERT (memcmp (result, input, 4000) == 0);
     ASSERT (strcmp (result + 4000, " 99") == 0);
     ASSERT (retval == strlen (result));
   }
+
+  /* Test the support of the %s format directive.  */
+
+  /* To verify that these tests succeed, it is necessary to run them under
+     a tool that checks against invalid memory accesses, such as ElectricFence
+     or "valgrind --tool=memcheck".  */
+  {
+    size_t i;
+
+    for (i = 1; i <= 8; i++)
+      {
+	char *block;
+	char result[5000];
+	int retval;
+
+	block = (char *) malloc (i);
+	memcpy (block, "abcdefgh", i);
+	retval = my_snprintf (result, sizeof (result), "%.*s", (int) i, block);
+	ASSERT (memcmp (result, block, i) == 0);
+	ASSERT (result[i] == '\0');
+	ASSERT (retval == strlen (result));
+	free (block);
+      }
+  }
+#if HAVE_WCHAR_T
+  {
+    size_t i;
+
+    for (i = 1; i <= 8; i++)
+      {
+	wchar_t *block;
+	size_t j;
+	char result[5000];
+	int retval;
+
+	block = (wchar_t *) malloc (i * sizeof (wchar_t));
+	for (j = 0; j < i; j++)
+	  block[j] = "abcdefgh"[j];
+	retval = my_snprintf (result, sizeof (result), "%.*ls", (int) i, block);
+	ASSERT (memcmp (result, "abcdefgh", i) == 0);
+	ASSERT (result[i] == '\0');
+	ASSERT (retval == strlen (result));
+	free (block);
+      }
+  }
+#endif
 }