/* Test for initial conversion state.
- Copyright (C) 2008-2016 Free Software Foundation, Inc.
+ Copyright (C) 2008-2020 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2008.
This program is free software: you can redistribute it and/or modify
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 <http://www.gnu.org/licenses/>. */
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "verify.h"
-#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
-
-/* On native Windows, 'mbstate_t' is defined as 'int'. */
-
-int
-mbsinit (const mbstate_t *ps)
-{
- return ps == NULL || *ps == 0;
-}
-
-#else
+#if GNULIB_defined_mbstate_t
/* Platforms that lack mbsinit() also lack mbrlen(), mbrtowc(), mbsrtowcs()
and wcrtomb(), wcsrtombs().
We define the meaning of mbstate_t as follows:
- In mb -> wc direction, mbstate_t's first byte contains the number of
buffered bytes (in the range 0..3), followed by up to 3 buffered bytes.
+ See mbrtowc.c.
- In wc -> mb direction, mbstate_t contains no information. In other
words, it is always in the initial state. */
return pstate == NULL || pstate[0] == 0;
}
+#else
+
+int
+mbsinit (const mbstate_t *ps)
+{
+# if defined _WIN32 && !defined __CYGWIN__
+ /* Native Windows. */
+ /* MSVC defines 'mbstate_t' as an 8-byte struct; the first 4 bytes matter.
+ On mingw, 'mbstate_t' is sometimes defined as 'int', sometimes defined as
+ an 8-byte struct, of which the first 4 bytes matter. */
+ return ps == NULL || *(const unsigned int *)ps == 0;
+# else
+ /* Minix, HP-UX 11.00, Solaris 2.6, Interix, ... */
+ /* Maybe this definition works, maybe not... */
+ return ps == NULL || *(const char *)ps == 0;
+# endif
+}
+
#endif