new file mode 100644
--- /dev/null
+++ b/packages/language/c/libc/stdio/current/src/common/vsnprintf.cxx
@@ -0,0 +1,143 @@
+//===========================================================================
+//
+//      vsnprintf.cxx
+//
+//      ANSI Stdio vsnprintf() function
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc_stdio.h>   // Configuration header
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions
+#include <stddef.h>                 // NULL and size_t from compiler
+#include <stdio.h>                  // header for this file
+#include <errno.h>                  // error codes
+#include <cyg/io/devtab.h>          // Device table
+#include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
+
+#include <cyg/libc/stdio/io.inl>     // I/O system inlines
+
+#ifndef CYGPKG_LIBC_STDIO_FILEIO
+
+// FUNCTIONS
+
+static Cyg_ErrNo
+str_write(cyg_stdio_handle_t handle, const void *buf, cyg_uint32 *len)
+{
+    cyg_devtab_entry_t *dev = (cyg_devtab_entry_t *)handle;
+    cyg_uint8 **str_p = (cyg_uint8 **)dev->priv;
+    cyg_ucount32 i;
+
+    // I suspect most strings passed to vsnprintf will be relatively short,
+    // so we just take the simple approach rather than have the overhead
+    // of calling memcpy etc.
+
+    // simply copy string until we run out of user space
+
+    for (i = 0; i < *len; i++, (*str_p)++ )
+    {
+        **str_p = *((cyg_uint8 *)buf + i);
+    } // for
+
+    *len = i;
+
+    return ENOERR;
+    
+} // str_write()
+
+static DEVIO_TABLE(devio_table,
+                   str_write,       // write
+                   NULL,            // read
+                   NULL,            // select
+                   NULL,            // get_config
+                   NULL);           // set_config
+
+externC int
+vsnprintf( char *s, size_t size, const char *format, va_list arg )
+{
+    int rc;
+    // construct a fake device with the address of the string we've
+    // been passed as its private data. This way we can use the data
+    // directly
+    DEVTAB_ENTRY_NO_INIT(strdev,
+                         "strdev",       // Name
+                         NULL,           // Dependent name (layered device)
+                         &devio_table,   // I/O function table
+                         NULL,           // Init
+                         NULL,           // Lookup
+                         &s);            // private
+    Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_WRITE,
+                               false, false, _IONBF, 0, NULL );
+    
+    rc = vfnprintf( (FILE *)&my_stream, size, format, arg );
+
+    // Null-terminate it, but note that s has been changed by str_write(), so
+    // that it now points to the end of the string
+    s[0] = '\0';
+
+    return rc;
+
+} // vsnprintf()
+
+#else
+
+externC int
+vsnprintf( char *s, size_t size, const char *format, va_list arg )
+{
+    int rc;
+
+    Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_WRITE,
+                               size, (cyg_uint8 *)s );
+    
+    rc = vfnprintf( (FILE *)&my_stream, size, format, arg );
+
+    if( rc > 0 )
+        s[rc] = '\0';
+
+    return rc;
+
+} // vsnprintf()
+
+#endif
+
+// EOF vsnprintf.cxx