bootstrap: fix handling of various perl --version formats

[gnulib.git] / tests / test-vasprintf-posix.c

diff --git a/tests/test-vasprintf-posix.c b/tests/test-vasprintf-posix.c
index 806ce74..ee3e758 100644 (file)
--- a/tests/test-vasprintf-posix.c
+++ b/tests/test-vasprintf-posix.c
@@ -1,5 +1,5 @@
 /* Test of POSIX compatible vasprintf() and asprintf() 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
@@ -21,14 +21,14 @@
 #include <stdio.h>
 
 #include <float.h>
-#include <math.h>
 #include <stdarg.h>
 #include <stddef.h>
-#include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "nan.h"
+
 #define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
 #define ASSERT(expr) \
   do                                                                        \
@@ -36,6 +36,7 @@
       if (!(expr))                                                          \
         {                                                                   \
           fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);                                                  \
           abort ();                                                         \
         }                                                                   \
     }                                                                       \
@@ -46,10 +47,30 @@ 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.
+   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.  */
 #ifdef WORDS_BIGENDIAN
@@ -196,7 +217,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%a %d", -0.0, 33, 44, 55);
+      my_asprintf (&result, "%a %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
@@ -227,7 +248,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%a %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%a %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -460,7 +481,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%050a %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%050a %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     /* "0000000nan 33" is not a valid result; see
        <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
@@ -510,7 +531,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%La %d", -0.0L, 33, 44, 55);
+      my_asprintf (&result, "%La %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0x0p+0 33") == 0);
@@ -541,7 +562,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%La %d", 0.0L / 0.0L, 33, 44, 55);
+      my_asprintf (&result, "%La %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -876,7 +897,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%050La %d", 0.0L / 0.0L, 33, 44, 55);
+      my_asprintf (&result, "%050La %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     /* "0000000nan 33" is not a valid result; see
        <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
@@ -1023,7 +1044,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%f %d", -0.0, 33, 44, 55);
+      my_asprintf (&result, "%f %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1056,7 +1077,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%f %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%f %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -1149,7 +1170,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%050f %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%050f %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -1168,6 +1189,26 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2f %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2f %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     char *result;
     int retval =
@@ -1302,7 +1343,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%Lf %d", -0.0L, 33, 44, 55);
+      my_asprintf (&result, "%Lf %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1333,10 +1374,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%Lf %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%Lf %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -1528,10 +1568,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%050Lf %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%050Lf %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -1550,6 +1589,26 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2Lf %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2Lf %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
   /* Test the support of the %F format directive.  */
 
   { /* A positive number.  */
@@ -1595,7 +1654,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%F %d", -0.0, 33, 44, 55);
+      my_asprintf (&result, "%F %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1628,7 +1687,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%F %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%F %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 1)
@@ -1668,6 +1727,26 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2F %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2F %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     char *result;
     int retval =
@@ -1711,7 +1790,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%LF %d", -0.0L, 33, 44, 55);
+      my_asprintf (&result, "%LF %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000 33") == 0);
@@ -1742,10 +1821,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%LF %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%LF %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 1)
@@ -1785,6 +1863,26 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2LF %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.2LF %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000.00 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
   /* Test the support of the %e format directive.  */
 
   { /* A positive number.  */
@@ -1933,7 +2031,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%e %d", -0.0, 33, 44, 55);
+      my_asprintf (&result, "%e %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0.000000e+00 33") == 0
@@ -1967,7 +2065,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%e %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%e %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -2078,7 +2176,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%050e %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%050e %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -2098,12 +2196,35 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.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 (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.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 (retval == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     char *result;
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2113,7 +2234,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2202,8 +2324,16 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
        char *result;
        int retval =
          my_asprintf (&result, "%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 (retval == strlen (result));
        free (result);
       }
@@ -2214,7 +2344,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2224,7 +2355,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2232,10 +2364,11 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%Le %d", -0.0L, 33, 44, 55);
+      my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2263,10 +2396,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%Le %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%Le %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -2381,7 +2513,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2391,7 +2524,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%-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 (retval == strlen (result));
     free (result);
   }
@@ -2401,7 +2535,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%+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 (retval == strlen (result));
     free (result);
   }
@@ -2411,7 +2546,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "% 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 (retval == strlen (result));
     free (result);
   }
@@ -2421,7 +2557,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%#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 (retval == strlen (result));
     free (result);
   }
@@ -2431,7 +2568,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%#.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 (retval == strlen (result));
     free (result);
   }
@@ -2441,7 +2579,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%#.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 (retval == strlen (result));
     free (result);
   }
@@ -2451,7 +2590,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2468,10 +2608,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%050Le %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%050Le %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -2485,7 +2624,30 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%.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 (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.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 (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.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 (retval == strlen (result));
     free (result);
   }
@@ -2636,7 +2798,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%g %d", -0.0, 33, 44, 55);
+      my_asprintf (&result, "%g %d", -zerod, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
@@ -2669,7 +2831,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%g %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%g %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -2773,7 +2935,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%050g %d", NAN, 33, 44, 55);
+      my_asprintf (&result, "%050g %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -2793,6 +2955,26 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     free (result);
   }
 
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.5g %d", 999.951, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.5g %d", 999.996, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
   { /* A positive number.  */
     char *result;
     int retval =
@@ -2808,7 +2990,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%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 (retval == strlen (result));
     free (result);
   }
@@ -2897,8 +3080,17 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
        char *result;
        int retval =
          my_asprintf (&result, "%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 (retval == strlen (result));
        free (result);
       }
@@ -2927,7 +3119,7 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   { /* Negative zero.  */
     char *result;
     int retval =
-      my_asprintf (&result, "%Lg %d", -0.0L, 33, 44, 55);
+      my_asprintf (&result, "%Lg %d", minus_zerol, 33, 44, 55);
     ASSERT (result != NULL);
     if (have_minus_zero ())
       ASSERT (strcmp (result, "-0 33") == 0);
@@ -2958,10 +3150,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%Lg %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%Lg %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
            && strisnan (result, 0, strlen (result) - 3, 0)
@@ -3136,7 +3327,8 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%#.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 (retval == strlen (result));
     free (result);
   }
@@ -3163,10 +3355,9 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     char *result;
     int retval =
-      my_asprintf (&result, "%050Lg %d", zero / zero, 33, 44, 55);
+      my_asprintf (&result, "%050Lg %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) == 50 + 3
            && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
@@ -3180,7 +3371,28 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     int retval =
       my_asprintf (&result, "%.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 (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with no rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.5Lg %d", 999.951L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "999.95 33") == 0);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  { /* Precision with rounding.  */
+    char *result;
+    int retval =
+      my_asprintf (&result, "%.5Lg %d", 999.996L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1000 33") == 0);
     ASSERT (retval == strlen (result));
     free (result);
   }
@@ -3273,6 +3485,19 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
   {
     char *result;
     int retval =
+      my_asprintf (&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);
+    ASSERT (retval == strlen (result));
+    free (result);
+  }
+
+  {
+    char *result;
+    int retval =
       my_asprintf (&result, "%.4000d %d", -1234567, 99);
     size_t i;
     ASSERT (result != NULL);
@@ -3354,6 +3579,56 @@ test_function (int (*my_asprintf) (char **, const char *, ...))
     ASSERT (retval == strlen (result));
     free (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;
+       int retval;
+
+       block = (char *) malloc (i);
+       memcpy (block, "abcdefgh", i);
+       retval = my_asprintf (&result, "%.*s", (int) i, block);
+       ASSERT (result != NULL);
+       ASSERT (memcmp (result, block, i) == 0);
+       ASSERT (result[i] == '\0');
+       ASSERT (retval == strlen (result));
+       free (result);
+       free (block);
+      }
+  }
+#if HAVE_WCHAR_T
+  {
+    size_t i;
+
+    for (i = 1; i <= 8; i++)
+      {
+       wchar_t *block;
+       size_t j;
+       char *result;
+       int retval;
+
+       block = (wchar_t *) malloc (i * sizeof (wchar_t));
+       for (j = 0; j < i; j++)
+         block[j] = "abcdefgh"[j];
+       retval = my_asprintf (&result, "%.*ls", (int) i, block);
+       ASSERT (result != NULL);
+       ASSERT (memcmp (result, "abcdefgh", i) == 0);
+       ASSERT (result[i] == '\0');
+       ASSERT (retval == strlen (result));
+       free (result);
+       free (block);
+      }
+  }
+#endif
 }
 
 static int