pmt: initial 3.0.2 update

include/libgnulib/vasnwprintf.h

@@ -0,0 +1,63 @@
+/* vswprintf with automatic memory allocation.
+   Copyright (C) 2002-2024 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _VASNWPRINTF_H
+#define _VASNWPRINTF_H
+
+/* Get va_list.  */
+#include <stdarg.h>
+
+/* Get wchar_t, size_t.  */
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Write formatted output to a string dynamically allocated with malloc().
+   You can pass a preallocated buffer for the result in RESULTBUF and its
+   size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
+   If successful, return the address of the string (this may be = RESULTBUF
+   if no dynamic memory allocation was necessary) and set *LENGTHP to the
+   number of resulting bytes, excluding the trailing NUL.  Upon error, set
+   errno and return NULL.
+
+   When dynamic memory allocation occurs, the preallocated buffer is left
+   alone (with possibly modified contents).  This makes it possible to use
+   a statically allocated or stack-allocated buffer, like this:
+
+          wchar_t buf[100];
+          size_t len = sizeof (buf) / sizeof (wchar_t);
+          wchar_t *output = vasnwprintf (buf, &len, format, args);
+          if (output == NULL)
+            ... error handling ...;
+          else
+            {
+              ... use the output string ...;
+              if (output != buf)
+                free (output);
+            }
+  */
+extern wchar_t * asnwprintf (wchar_t *resultbuf, size_t *lengthp,
+                             const wchar_t *format, ...);
+extern wchar_t * vasnwprintf (wchar_t *resultbuf, size_t *lengthp,
+                              const wchar_t *format, va_list args);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _VASNWPRINTF_H */