Subversion Repositories openrisc

//===========================================================================

//

//      strxfrm.cxx

//

//      ANSI standard strxfrm() routine

//

//===========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos 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 General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//===========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    jlarmour

// Contributors: 

// Date:         2000-04-14

// Purpose:     

// Description: 

// Usage:       

//

//####DESCRIPTIONEND####

//

//===========================================================================

// CONFIGURATION

#include <pkgconf/libc_string.h>   // Configuration header

// 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 <cyg/libc/string/stringsupp.hxx> // Useful string function support and

                                          // prototypes

// EXPORTED SYMBOLS

externC size_t

strxfrm( char *s1, const char *s2, size_t n ) \

    CYGBLD_ATTRIB_WEAK_ALIAS(__strxfrm);

// FUNCTIONS

size_t

__strxfrm( char *s1, const char *s2, size_t n )

{

    size_t res = 0;

    CYG_REPORT_FUNCNAMETYPE( "__strxfrm", "returning size %d" );

    CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, n=%d", s1, s2, n );

    if (n)

    {

        CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );

    }

    CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );

    while (n-- > 0)

    {

        if ((*s1++ = *s2++) != '\0')

            ++res;

        else

        {

            CYG_REPORT_RETVAL( res );

            return res;

        } // else

    } // while

    while (*s2)

    {

        ++s2;

        ++res;

    } // while

    CYG_REPORT_RETVAL( res );

    return res;

} // __strxfrm()

// EOF strxfrm.cxx