obstack-zprintf-posix: Add tests.

* tests/test-obstack-zprintf-posix.c: New file, based on
tests/test-vazsprintf-posix.c.
* modules/obstack-zprintf-posix-tests: New file.

ChangeLog

@@ -1,5 +1,10 @@
 2024-06-24  Bruno Haible  <bruno@clisp.org>
 
+	obstack-zprintf-posix: Add tests.
+	* tests/test-obstack-zprintf-posix.c: New file, based on
+	tests/test-vazsprintf-posix.c.
+	* modules/obstack-zprintf-posix-tests: New file.
+
 	obstack-zprintf-posix: New module.
 	* modules/obstack-zprintf-posix: New file.
 

modules/obstack-zprintf-posix-tests

@@ -0,0 +1,14 @@
+Files:
+tests/test-obstack-zprintf-posix.c
+tests/infinity.h
+tests/macros.h
+
+Depends-on:
+nan
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-obstack-zprintf-posix
+check_PROGRAMS += test-obstack-zprintf-posix
+test_obstack_zprintf_posix_LDADD = $(LDADD) @LIBINTL@

tests/test-obstack-zprintf-posix.c

@@ -0,0 +1,262 @@
+/* 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;
+}