--- /dev/null
+/* Test of POSIX compatible vazsprintf() and azsprintf() functions.
+ Copyright (C) 2007-2024 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
+ 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
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2024. */
+
+/* This test exercises only a few POSIX compliance problems that are still
+ visible on platforms relevant in 2024. For a much more complete test suite,
+ see test-vasprintf-posix.c. */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+#include "infinity.h"
+#include "nan.h"
+
+/* 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 (ptrdiff_t (*my_azsprintf) (char **, const char *, ...))
+{
+ char result[5000];
+
+ /* Test the support of the 'a' and 'A' conversion specifier for hexadecimal
+ output of floating-point numbers. */
+
+ { /* This test would fail on Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%a %d", 3.1416015625, 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "0x1.922p+1 33") == 0
+ || strcmp (result, "0x3.244p+0 33") == 0
+ || strcmp (result, "0x6.488p-1 33") == 0
+ || strcmp (result, "0xc.91p-2 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%A %d", -3.1416015625, 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "-0X1.922P+1 33") == 0
+ || strcmp (result, "-0X3.244P+0 33") == 0
+ || strcmp (result, "-0X6.488P-1 33") == 0
+ || strcmp (result, "-0XC.91P-2 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on FreeBSD 6.1, NetBSD 10.0. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%.2a %d", 1.51, 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "0x1.83p+0 33") == 0
+ || strcmp (result, "0x3.05p-1 33") == 0
+ || strcmp (result, "0x6.0ap-2 33") == 0
+ || strcmp (result, "0xc.14p-3 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on macOS 14, FreeBSD 14.0, OpenBSD 7.5, AIX 7.3,
+ Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%.0a %d", 1.51, 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "0x2p+0 33") == 0
+ || strcmp (result, "0x3p-1 33") == 0
+ || strcmp (result, "0x6p-2 33") == 0
+ || strcmp (result, "0xcp-3 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ /* Test the support of the %f format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%f %d", Infinityd (), 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "inf 33") == 0
+ || strcmp (result, "infinity 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%f %d", NaNd (), 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 (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%010f %d", Infinityd (), 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, " inf 33") == 0
+ || strcmp (result, " infinity 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ /* Test the support of the %e format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%e %d", Infinityd (), 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "inf 33") == 0
+ || strcmp (result, "infinity 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%e %d", NaNd (), 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 (retval == strlen (result));
+ free (result);
+ }
+
+ /* Test the support of the %g format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%g %d", Infinityd (), 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "inf 33") == 0
+ || strcmp (result, "infinity 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%g %d", NaNd (), 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 (retval == strlen (result));
+ free (result);
+ }
+
+ /* Test the support of large precision. */
+
+ { /* This test would fail on AIX 7.1. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%.4000d %d", 1234567, 99);
+ ASSERT (result != NULL);
+ size_t i;
+ 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);
+ }
+
+ /* Test the support of the 'b' conversion specifier for binary output of
+ integers. */
+
+ { /* This test would fail on glibc 2.34, musl libc, macOS 14,
+ FreeBSD 13.2, NetBSD 10.0, OpenBSD 7.5, AIX 7.3, Solaris 11.4. */
+ char *result;
+ ptrdiff_t retval =
+ my_azsprintf (&result, "%b %d", 12345, 33, 44, 55);
+ ASSERT (result != NULL);
+ ASSERT (strcmp (result, "11000000111001 33") == 0);
+ ASSERT (retval == strlen (result));
+ free (result);
+ }
+}
+
+static ptrdiff_t
+my_azsprintf (char **result, const char *format, ...)
+{
+ va_list args;
+ ptrdiff_t ret;
+
+ va_start (args, format);
+ ret = vazsprintf (result, format, args);
+ va_end (args);
+ return ret;
+}
+
+static void
+test_vazsprintf ()
+{
+ test_function (my_azsprintf);
+}
+
+static void
+test_azsprintf ()
+{
+ test_function (azsprintf);
+}
+
+int
+main (int argc, char *argv[])
+{
+ test_vazsprintf ();
+ test_azsprintf ();
+ return test_exit_status;
+}