1 files changed, 55 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/stdio/vsnprintf.c b/winsup/mingw/mingwex/stdio/vsnprintf.c
new file mode 100644
index 000000000..a9722c235
--- /dev/null
+++ b/winsup/mingw/mingwex/stdio/vsnprintf.c
@@ -0,0 +1,55 @@
+/* vsnprintf.c
+ *
+ * $Id$
+ *
+ * Provides an implementation of the "vsnprintf" function, conforming
+ * generally to C99 and SUSv3/POSIX specifications, with extensions
+ * to support Microsoft's non-standard format specifications.  This
+ * is included in libmingwex.a, replacing the redirection through
+ * libmoldnames.a, to the MSVCRT standard "_vsnprintf" function; (the
+ * standard MSVCRT function remains available, and may  be invoked
+ * directly, using this fully qualified form of its name).
+ *
+ * Written by Keith Marshall <keithmarshall@users.sourceforge.net>
+ *
+ * This is free software.  You may redistribute and/or modify it as you
+ * see fit, without restriction of copyright.
+ *
+ * This software is provided "as is", in the hope that it may be useful,
+ * but WITHOUT WARRANTY OF ANY KIND, not even any implied warranty of
+ * MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE.  At no
+ * time will the author accept any form of liability for any damages,
+ * however caused, resulting from the use of this software.
+ *
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "pformat.h"
+
+int __cdecl __vsnprintf (char *, size_t, const char *fmt, va_list) __MINGW_NOTHROW;
+int __cdecl __mingw_alias(vsnprintf) (char *, size_t, const char *, va_list) __MINGW_NOTHROW;
+
+int __cdecl __vsnprintf( char *buf, size_t length, const char *fmt, va_list argv )
+{
+  register int retval;
+
+  if( length == (size_t)(0) )
+    /*
+     * No buffer; simply compute and return the size required,
+     * without actually emitting any data.
+     */
+    return __pformat( 0, buf, 0, fmt, argv );
+
+  /* If we get to here, then we have a buffer...
+   * Emit data up to the limit of buffer length less one,
+   * then add the requisite NUL terminator.
+   */
+  retval = __pformat( 0, buf, --length, fmt, argv );
+  buf[retval < length ? retval : length] = '\0';
+
+  return retval;
+}
+
+/* $RCSfile$Revision$: end of file */