1 files changed, 73 insertions, 0 deletions
diff --git a/gnulib-tests/test-stdio.c b/gnulib-tests/test-stdio.c
new file mode 100644
index 0000000..9794f4d
--- /dev/null
+++ b/gnulib-tests/test-stdio.c
@@ -0,0 +1,73 @@
+/* Test of <stdio.h> substitute.
+   Copyright (C) 2007, 2009-2023 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>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that the _PRINTF_NAN_LEN_MAX macro is defined.  */
+int pnlm[] = { _PRINTF_NAN_LEN_MAX };
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+static_assert (sizeof NULL == sizeof (void *));
+
+/* Check that the types are all defined.  */
+fpos_t t1;
+off_t t2;
+size_t t3;
+ssize_t t4;
+va_list t5;
+
+#include <string.h>
+
+#include "nan.h"
+#include "macros.h"
+
+int
+main (void)
+{
+#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
+  /* Check the value of _PRINTF_NAN_LEN_MAX.  */
+  {
+    #define NWORDS \
+      ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+    typedef union { double value; unsigned int word[NWORDS]; } memory_double;
+
+    double value1;
+    memory_double value2;
+    char buf[64];
+
+    value1 = NaNd();
+    sprintf (buf, "%g", value1);
+    ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
+
+    value2.value = NaNd ();
+    #if DBL_EXPBIT0_BIT == 20
+    value2.word[DBL_EXPBIT0_WORD] ^= 0x54321;
+    #endif
+    sprintf (buf, "%g", value2.value);
+    ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
+  }
+#endif
+
+  return 0;
+}