X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-vasnprintf-posix.c;h=0162196a0aa03a34fa0c79ab4f4d5b42263c52cd;hb=7da6c6f9a62e4a00ad88beb04f492b28fe517699;hp=db39fbe84e73f8cc098896a7ab1b08981c29f8bf;hpb=9064585003a902e1bb951b5380dd5ee4bc9c3148;p=gnulib.git

diff --git a/tests/test-vasnprintf-posix.c b/tests/test-vasnprintf-posix.c
index db39fbe84..0162196a0 100644
--- a/tests/test-vasnprintf-posix.c
+++ b/tests/test-vasnprintf-posix.c
@@ -1,10 +1,10 @@
 /* Test of POSIX compatible vasnprintf() and asnprintf() functions.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2009 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,17 +12,15 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include "vasnprintf.h"
 
+#include <float.h>
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdio.h>
@@ -30,6 +28,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "nan.h"
+
 #define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
 #define ASSERT(expr) \
   do									     \
@@ -37,32 +37,54 @@
       if (!(expr))							     \
         {								     \
           fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
           abort ();							     \
         }								     \
     }									     \
   while (0)
 
-/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0.  */
-#ifdef __DECC
-static double
-NaN ()
-{
-  static double zero = 0.0;
-  return zero / zero;
-}
-#else
-# define NaN() (0.0 / 0.0)
-#endif
-
 /* The SGI MIPS floating-point format does not distinguish 0.0 and -0.0.  */
 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
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+    { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
+      ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16),    \
+      (unsigned int) (mantlo) << 16                                        \
+    }
+#else
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+    { mantlo, manthi, exponent }
+#endif
+
 static int
 strmatch (const char *pattern, const char *string)
 {
@@ -74,6 +96,27 @@ strmatch (const char *pattern, const char *string)
   return 1;
 }
 
+/* Test whether string[start_index..end_index-1] is a valid textual
+   representation of NaN.  */
+static int
+strisnan (const char *string, size_t start_index, size_t end_index, int uppercase)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+	start_index++;
+      if (start_index + 3 <= end_index
+	  && memcmp (string + start_index, uppercase ? "NAN" : "nan", 3) == 0)
+	{
+	  start_index += 3;
+	  if (start_index == end_index
+	      || (string[start_index] == '(' && string[end_index - 1] == ')'))
+	    return 1;
+	}
+    }
+  return 0;
+}
+
 static void
 test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
 {
@@ -194,7 +237,7 @@ 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);
@@ -225,11 +268,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%a %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%a %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -459,13 +501,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020a %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%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> */
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -510,7 +551,7 @@ 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);
@@ -541,15 +582,115 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%La %d", 0.0L / 0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%La %d", NaNl (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
 
   { /* Rounding near the decimal point.  */
     size_t length;
@@ -776,13 +917,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020La %d", 0.0L / 0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%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> */
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -924,7 +1064,7 @@ 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);
@@ -957,11 +1097,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%f %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%f %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1051,11 +1190,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020f %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050f %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1071,6 +1209,26 @@ 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 =
@@ -1205,7 +1363,7 @@ 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);
@@ -1236,18 +1394,117 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Lf %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Lf %d", NaNl (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
 
   { /* Width.  */
     size_t length;
@@ -1331,14 +1588,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020Lf %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050Lf %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1354,6 +1609,26 @@ 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.  */
@@ -1399,7 +1674,7 @@ 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);
@@ -1432,11 +1707,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%F %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%F %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "NAN", 3) == 0
-		|| memcmp (result, "-NAN", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 1)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1473,6 +1747,26 @@ 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 =
@@ -1516,7 +1810,7 @@ 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);
@@ -1547,14 +1841,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%LF %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%LF %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "NAN", 3) == 0
-		|| memcmp (result, "-NAN", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 1)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1591,6 +1883,26 @@ 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.  */
@@ -1739,7 +2051,7 @@ 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
@@ -1773,11 +2085,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%e %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%e %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1885,11 +2196,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020e %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050e %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -1906,12 +2216,35 @@ 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);
   }
@@ -1921,7 +2254,8 @@ 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);
   }
@@ -2010,8 +2344,16 @@ 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);
       }
@@ -2022,7 +2364,8 @@ 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);
   }
@@ -2032,7 +2375,8 @@ 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);
   }
@@ -2040,10 +2384,11 @@ 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);
   }
@@ -2071,75 +2416,180 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Le %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* Width.  */
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%15Le %d", 1.75L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "   1.750000e+00 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* FLAG_LEFT.  */
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%-15Le %d", 1.75L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.750000e+00    33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* FLAG_SHOWSIGN.  */
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%+Le %d", 1.75L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "+1.750000e+00 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* FLAG_SPACE.  */
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "% Le %d", 1.75L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, " 1.750000e+00 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* FLAG_ALT.  */
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%#Le %d", 1.75L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "1.750000e+00 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
-
-  { /* FLAG_ALT.  */
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
+
+  { /* Width.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%15Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "   1.750000e+00 33") == 0
+	    || strcmp (result, "  1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_LEFT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%-15Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00    33") == 0
+	    || strcmp (result, "1.750000e+000   33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SHOWSIGN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%+Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "+1.750000e+00 33") == 0
+	    || strcmp (result, "+1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SPACE.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "% Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, " 1.750000e+00 33") == 0
+	    || strcmp (result, " 1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00 33") == 0
+	    || strcmp (result, "1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
     size_t length;
     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);
   }
@@ -2149,7 +2599,8 @@ 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);
   }
@@ -2159,7 +2610,8 @@ 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);
   }
@@ -2176,14 +2628,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020Le %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050Le %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -2194,7 +2644,30 @@ 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);
   }
@@ -2345,7 +2818,7 @@ 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);
@@ -2378,11 +2851,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%g %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%g %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -2483,11 +2955,10 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020g %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050g %d", NaNd (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -2504,6 +2975,26 @@ 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 =
@@ -2519,7 +3010,8 @@ 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);
   }
@@ -2608,8 +3100,17 @@ 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);
       }
@@ -2638,7 +3139,7 @@ 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);
@@ -2669,18 +3170,117 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%Lg %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%Lg %d", NaNl (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
     ASSERT (result != NULL);
     ASSERT (strlen (result) >= 3 + 3
-	    && (memcmp (result, "nan", 3) == 0
-		|| memcmp (result, "-nan", 4) == 0)
+	    && strisnan (result, 0, strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
 
   { /* Width.  */
     size_t length;
@@ -2747,7 +3347,8 @@ 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);
   }
@@ -2774,14 +3375,12 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   }
 
   { /* FLAG_ZERO with NaN.  */
-    static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%020Lg %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050Lg %d", NaNl (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strlen (result) == 20 + 3
-	    && (memcmp (result + strspn (result, " "), "nan", 3) == 0
-		|| memcmp (result + strspn (result, " "), "-nan", 4) == 0)
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
 	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
@@ -2792,7 +3391,28 @@ 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);
   }
@@ -2834,6 +3454,201 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     ASSERT (length == strlen (result));
     free (result);
   }
+
+  /* Test the support of the left-adjust flag.  */
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "a%*sc", -3, "b");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "ab  c") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "a%-*sc", 3, "b");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "ab  c") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "a%-*sc", -3, "b");
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "ab  c") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  /* Test the support of large precision.  */
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.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);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    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);
+    ASSERT (result[0] == '-');
+    for (i = 0; i < 4000 - 7; i++)
+      ASSERT (result[1 + i] == '0');
+    ASSERT (strcmp (result + 1 + 4000 - 7, "1234567 99") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.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);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.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);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.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);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.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++)
+      ASSERT (result[2 + i] == '0');
+    ASSERT (strcmp (result + 2 + 4000 - 6, "12d687 99") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  {
+    char input[5000];
+    size_t length;
+    char *result;
+    size_t i;
+
+    for (i = 0; i < sizeof (input) - 1; i++)
+      input[i] = 'a' + ((1000000 / (i + 1)) % 26);
+    input[i] = '\0';
+    result = my_asnprintf (NULL, &length, "%.4000s %d", input, 99);
+    ASSERT (result != NULL);
+    ASSERT (memcmp (result, input, 4000) == 0);
+    ASSERT (strcmp (result + 4000, " 99") == 0);
+    ASSERT (length == 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;
+	size_t length;
+	char *result;
+
+	block = (char *) malloc (i);
+	memcpy (block, "abcdefgh", i);
+	result = my_asnprintf (NULL, &length, "%.*s", (int) i, block);
+	ASSERT (result != NULL);
+	ASSERT (memcmp (result, block, i) == 0);
+	ASSERT (result[i] == '\0');
+	ASSERT (length == 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;
+	size_t length;
+	char *result;
+
+	block = (wchar_t *) malloc (i * sizeof (wchar_t));
+	for (j = 0; j < i; j++)
+	  block[j] = "abcdefgh"[j];
+	result = my_asnprintf (NULL, &length, "%.*ls", (int) i, block);
+	ASSERT (result != NULL);
+	ASSERT (memcmp (result, "abcdefgh", i) == 0);
+	ASSERT (result[i] == '\0');
+	ASSERT (length == strlen (result));
+	free (result);
+	free (block);
+      }
+  }
+#endif
 }
 
 static char *