new file mode 100644
--- /dev/null
+++ b/packages/language/c/libc/current/src/string/memchr.cxx
@@ -0,0 +1,168 @@
+//===========================================================================
+//
+//      memchr.cxx
+//
+//      ANSI standard memchr() routine
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// 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 Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+// Include the C library?
+#ifdef CYGPKG_LIBC     
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions
+#include <cyg/infra/cyg_trac.h>    // Tracing support
+#include <cyg/infra/cyg_ass.h>     // Assertion support
+#include <string.h>                // Header for this file
+#include <stddef.h>           // Compiler definitions such as size_t, NULL etc.
+#include "clibincl/stringsupp.hxx" // Useful string function support and
+                                   // prototypes
+
+// EXPORTED SYMBOLS
+
+externC void *
+memchr( const void *s, int c, size_t n ) CYGPRI_LIBC_WEAK_ALIAS("_memchr");
+
+// FUNCTIONS
+
+void *
+_memchr( const void *s, int c, size_t n )
+{
+    CYG_REPORT_FUNCNAMETYPE( "_memchr", "returning addr %08x" );
+    CYG_REPORT_FUNCARG3( "s=%08x, c=%d, n=%d", s, c, n );
+
+    CYG_CHECK_DATA_PTR( s, "s is not a valid pointer!" );
+
+#if defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) || defined(__OPTIMIZE_SIZE__)
+    const unsigned char *src = (const unsigned char *) s;
+    
+    while (n--)
+    {
+        if (*src == c)
+        {
+            CYG_REPORT_RETVAL( src );
+            return (void *) src;
+        } // if
+        src++;
+    }
+    CYG_REPORT_RETVAL( NULL );
+    return NULL;
+#else
+    const unsigned char *src = (const unsigned char *) s;
+    CYG_WORD *aligned_src;
+    CYG_WORD buffer;
+    CYG_WORD mask;
+    cyg_ucount8 i;
+    
+    // If the size is small, or src is unaligned, then 
+    // use the bytewise loop.  We can hope this is rare.
+    if (CYG_LIBC_STR_OPT_TOO_SMALL (n) || CYG_LIBC_STR_UNALIGNED (src)) 
+    {
+        while (n--)
+        {
+            if (*src == c)
+            {
+                CYG_REPORT_RETVAL( src );
+                return (void *) src;
+            } // if
+            src++;
+        }
+        CYG_REPORT_RETVAL( NULL );
+        return NULL;
+    }
+    
+    // The fast code reads the ASCII one word at a time and only 
+    // performs the bytewise search on word-sized segments if they
+    // contain the search character, which is detected by XORing 
+    // the word-sized segment with a word-sized block of the search
+    // character and then detecting for the presence of NULL in the
+    // result.
+
+    aligned_src = (CYG_WORD *) src;
+    mask = 0;
+    for (i = 0; i < CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE; i++)
+        mask = (mask << 8) + c;
+    
+    while (n > CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE)
+    {
+        buffer = *aligned_src;
+        buffer ^=  mask;
+        if (CYG_LIBC_STR_DETECTNULL (buffer))
+        {
+            src = (unsigned char*) aligned_src;
+            for ( i = 0; i < CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE; i++ )
+            {
+                if (*src == c)
+                {
+                    CYG_REPORT_RETVAL( src );
+                    return (void *) src;
+                } // if
+                src++;
+            }
+        }
+        n -= CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE;
+        aligned_src++;
+    }
+    
+    // If there are fewer than CYG_LIBC_STR_OPT_LITTLEBLOCKSIZE characters
+    // left, then we resort to the bytewise loop.
+    
+    src = (const unsigned char *) aligned_src;
+    while (n--)
+    {
+        if (*src == c)
+        {
+            CYG_REPORT_RETVAL( src );
+            return (void *) src;
+        } // if
+        src++;
+    } 
+
+    CYG_REPORT_RETVAL( NULL );
+    return NULL;
+#endif // not defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) ||
+       //     defined(__OPTIMIZE_SIZE__)
+} // _memchr()
+
+#endif // ifdef CYGPKG_LIBC     
+
+// EOF memchr.cxx