Subversion Repositories openrisc_me

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

//

//      mbtowc_c.cxx

//

//      Internal __mbtowc_c() 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):     jjohnstn

// Contributors:  jjohnstn

// Date:          2000-11-24

// Purpose:       Provide internal use __mbtowc_c() routine

// Description:   C locale version of mbtowc()

// Usage:       

//

//####DESCRIPTIONEND####

//

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

//

// CONFIGURATION

#include <pkgconf/libc_i18n.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 <locale.h>

#include <stdlib.h>                // Header for this file

#include <string.h>                // strcmp definition

#include <stddef.h>                // size_t definition

#include "internal.h"              // internal __isxxxx macros

// TRACE

#if defined(CYGDBG_USE_TRACING) && defined(CYGNUM_LIBC_STDLIB_MBTOWC_TRACE_LEVEL)

static int mbtowc_trace = CYGNUM_LIBC_STDLIB_MBTOWC_TRACE_LEVEL;

# define TL1 (0 < mbtowc_trace)

#else

# define TL1 (0)

#endif

// STATICS

// FUNCTIONS

int

__mbtowc_c ( wchar_t *pwc, const char *s, size_t n, int *state )

{

  wchar_t dummy;

  unsigned char *t = (unsigned char *)s;

  int retval;

  CYG_REPORT_FUNCNAMETYPE( "__mbtowc_c", "returning %d" );

  CYG_REPORT_FUNCARG4( "pwc=%08x, s=%08x, n=%ud, state=%08x", pwc, s, n, state );

  if (pwc != NULL)

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

  if (s != NULL)

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

  if (pwc == NULL)

    pwc = &dummy;

  if (s != NULL && n == 0)

    {

      retval = -1;

      CYG_REPORT_RETVAL (retval);

      return retval;

    }

  if (s == NULL)

    retval = 0;  /* not state-dependent */

  else

    {

      if (pwc)

        *pwc = (wchar_t)*t;

      retval = (*t != '\0');

    }

  CYG_REPORT_RETVAL (retval);

  return retval;

} // __mbtowc_c()

// EOF mbtowc_c.cxx