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/*

 * Copyright (c) 2003-2004, Artem B. Bityuckiy

 * Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include "cesbi.h"

#if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL) \

 || defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)

#include <_ansi.h>

#include <reent.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include "../lib/local.h"

#include "../lib/ucsconv.h"

#include "../lib/endian.h"

/*

 * Internal 2-byte representation of UCS-2 codes without restrictions and

 * without BOM support.

 */

#if defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)

static size_t

_DEFUN(ucs_2_internal_convert_from_ucs, (data, in, outbuf, outbytesleft),

                                        _VOID_PTR data         _AND

                                        register ucs4_t in     _AND

                                        unsigned char **outbuf _AND

                                        size_t *outbytesleft)

{

  if (in > 0x0000FFFF)

    return (size_t)ICONV_CES_INVALID_CHARACTER;

  if (*outbytesleft < sizeof (ucs2_t))

    return (size_t)ICONV_CES_NOSPACE;

  *((ucs2_t *)(*outbuf)) = (ucs2_t)in;

  *outbuf += sizeof (ucs2_t);

  *outbytesleft -= sizeof (ucs2_t);

  return sizeof (ucs2_t);

}

#endif /* ICONV_FROM_UCS_CES_UCS_2_INTERNAL */

#if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL)

static ucs4_t

_DEFUN(ucs_2_internal_convert_to_ucs, (data, inbuf, inbytesleft),

                                      _VOID_PTR data               _AND

                                      _CONST unsigned char **inbuf _AND

                                      size_t *inbytesleft)

{

  register ucs4_t res;

  if (*inbytesleft < sizeof (ucs2_t))

    return (ucs4_t)ICONV_CES_BAD_SEQUENCE;

  res = (ucs4_t)*((ucs2_t *)(*inbuf));

  if (res > 0x0000FFFF)

    return (ucs4_t)ICONV_CES_INVALID_CHARACTER;

  *inbuf += sizeof (ucs2_t);

  *inbytesleft -= sizeof (ucs2_t);

  return res;

}

#endif /* ICONV_TO_UCS_CES_UCS_2_INTERNAL */

static int

_DEFUN(ucs_2_internal_get_mb_cur_max, (data),

                                      _VOID_PTR data)

{

  return 2;

}

#if defined (ICONV_TO_UCS_CES_UCS_2_INTERNAL)

_CONST iconv_to_ucs_ces_handlers_t

_iconv_to_ucs_ces_handlers_ucs_2_internal =

{

  NULL,

  NULL,

  ucs_2_internal_get_mb_cur_max,

  NULL,

  NULL,

  NULL,

  ucs_2_internal_convert_to_ucs

};

#endif

#if defined (ICONV_FROM_UCS_CES_UCS_2_INTERNAL)

_CONST iconv_from_ucs_ces_handlers_t

_iconv_from_ucs_ces_handlers_ucs_2_internal =

{

  NULL,

  NULL,

  ucs_2_internal_get_mb_cur_max,

  NULL,

  NULL,

  NULL,

  ucs_2_internal_convert_from_ucs

};

#endif

#endif /* ICONV_TO_UCS_CES_UCS_2_INTERNAL || ICONV_FROM_UCS_CES_UCS_2_INTERNAL */