--- /dev/null
+/* Test of POSIX compatible obstack_[v]zprintf() 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. */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "obstack.h"
+
+#include "macros.h"
+#include "infinity.h"
+#include "nan.h"
+
+#define obstack_chunk_alloc malloc
+#define obstack_chunk_free free
+
+/* 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_obstack_zprintf) (struct obstack *, const char *, ...))
+{
+ struct obstack obs;
+ obstack_init (&obs);
+
+ #define RESULT_EQ(expected) \
+ (len == strlen (expected) && memcmp (result, expected, len) == 0)
+
+ /* 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. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%a %d", 3.1416015625, 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("0x1.922p+1 33")
+ || RESULT_EQ ("0x3.244p+0 33")
+ || RESULT_EQ ("0x6.488p-1 33")
+ || RESULT_EQ ("0xc.91p-2 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%A %d", -3.1416015625, 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("-0X1.922P+1 33")
+ || RESULT_EQ ("-0X3.244P+0 33")
+ || RESULT_EQ ("-0X6.488P-1 33")
+ || RESULT_EQ ("-0XC.91P-2 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on FreeBSD 6.1, NetBSD 10.0. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%.2a %d", 1.51, 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("0x1.83p+0 33")
+ || RESULT_EQ ("0x3.05p-1 33")
+ || RESULT_EQ ("0x6.0ap-2 33")
+ || RESULT_EQ ("0xc.14p-3 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on macOS 14, FreeBSD 14.0, OpenBSD 7.5, AIX 7.3,
+ Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%.0a %d", 1.51, 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("0x2p+0 33")
+ || RESULT_EQ ("0x3p-1 33")
+ || RESULT_EQ ("0x6p-2 33")
+ || RESULT_EQ ("0xcp-3 33"));
+ obstack_free (&obs, result);
+ }
+
+ /* Test the support of the %f format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%f %d", Infinityd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("inf 33")
+ || RESULT_EQ ("infinity 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%f %d", NaNd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (len >= 3 + 3
+ && strisnan (result, 0, len - 3, 0)
+ && memcmp (result + len - 3, " 33", 3) == 0);
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%010f %d", Infinityd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ (" inf 33")
+ || RESULT_EQ (" infinity 33"));
+ obstack_free (&obs, result);
+ }
+
+ /* Test the support of the %e format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%e %d", Infinityd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("inf 33")
+ || RESULT_EQ ("infinity 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%e %d", NaNd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (len >= 3 + 3
+ && strisnan (result, 0, len - 3, 0)
+ && memcmp (result + len - 3, " 33", 3) == 0);
+ obstack_free (&obs, result);
+ }
+
+ /* Test the support of the %g format directive. */
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%g %d", Infinityd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("inf 33")
+ || RESULT_EQ ("infinity 33"));
+ obstack_free (&obs, result);
+ }
+
+ { /* This test would fail on AIX 7.3, Solaris 11.4. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%g %d", NaNd (), 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (len >= 3 + 3
+ && strisnan (result, 0, len - 3, 0)
+ && memcmp (result + len - 3, " 33", 3) == 0);
+ obstack_free (&obs, result);
+ }
+
+ /* Test the support of large precision. */
+
+ { /* This test would fail on AIX 7.1. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%.4000d %d", 1234567, 99);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (len == 4000 + 3);
+ size_t i;
+ for (i = 0; i < 4000 - 7; i++)
+ ASSERT (result[i] == '0');
+ ASSERT (memcmp (result + 4000 - 7, "1234567 99", 7 + 3) == 0);
+ obstack_free (&obs, 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. */
+ ptrdiff_t len =
+ my_obstack_zprintf (&obs, "%b %d", 12345, 33, 44, 55);
+ ASSERT (len >= 0);
+ char *result = obstack_finish (&obs);
+ ASSERT (RESULT_EQ ("11000000111001 33"));
+ obstack_free (&obs, result);
+ }
+
+ obstack_free (&obs, NULL);
+}
+
+static ptrdiff_t
+my_obstack_zprintf (struct obstack *obs, const char *format, ...)
+{
+ va_list args;
+ ptrdiff_t ret;
+
+ va_start (args, format);
+ ret = obstack_vzprintf (obs, format, args);
+ va_end (args);
+ return ret;
+}
+
+static void
+test_obstack_vzprintf ()
+{
+ test_function (my_obstack_zprintf);
+}
+
+static void
+test_obstack_zprintf ()
+{
+ test_function (obstack_zprintf);
+}
+
+int
+main (int argc, char *argv[])
+{
+ test_obstack_vzprintf ();
+ test_obstack_zprintf ();
+ return test_exit_status;
+}