171 lines
4.7 KiB
C
171 lines
4.7 KiB
C
/*
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* Copyright (c) 2003-2004, Artem B. Bityuckiy
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* Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cesbi.h"
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#if defined (ICONV_TO_UCS_CES_UCS_2) \
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|| defined (ICONV_FROM_UCS_CES_UCS_2)
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#include <_ansi.h>
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#include <reent.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include "../lib/local.h"
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#include "../lib/ucsconv.h"
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#include "../lib/endian.h"
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/*
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* BOM isn't supported. UCS-2 is Big Endian. Bad codes are rejected.
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* Bad codes: 0xFFFF, 0xFFFE, 0xD800-0xDFFF.
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*/
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#define UCS_2_BIG_ENDIAN 0
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#define UCS_2_LITTLE_ENDIAN 1
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#define UCS_2 "ucs_2"
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#define UCS_2BE "ucs_2be"
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#define UCS_2LE "ucs_2le"
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static _VOID_PTR
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_DEFUN(ucs_2_init, (rptr, encoding),
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struct _reent *rptr,
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_CONST char *encoding)
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{
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int *data;
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if ((data = (int *) _malloc_r(rptr, sizeof (int))) == NULL)
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return (_VOID_PTR)NULL;
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if (strcmp (encoding, UCS_2LE) == 0)
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*data = UCS_2_LITTLE_ENDIAN;
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else
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*data = UCS_2_BIG_ENDIAN;
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return (_VOID_PTR)data;
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}
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static size_t
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_DEFUN(ucs_2_close, (rptr, data),
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struct _reent *rptr,
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_VOID_PTR data)
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{
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_free_r (rptr, data);
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return 0;
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}
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#if defined (ICONV_FROM_UCS_CES_UCS_2)
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static size_t
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_DEFUN(ucs_2_convert_from_ucs, (data, in, outbuf, outbytesleft),
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_VOID_PTR data,
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ucs4_t in,
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unsigned char **outbuf,
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size_t *outbytesleft)
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{
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if ((in >= 0x0000D800 && in <= 0x0000DFFF) /* Surrogate character */
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|| in >= 0x0000FFFE)
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return (size_t)ICONV_CES_INVALID_CHARACTER;
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if (*outbytesleft < sizeof (ucs2_t))
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return (size_t)ICONV_CES_NOSPACE;
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if (*((int *)data) == UCS_2_BIG_ENDIAN)
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*((ucs2_t *)(*outbuf)) = ICONV_HTOBES ((ucs2_t)in);
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else
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*((ucs2_t *)(*outbuf)) = ICONV_HTOLES ((ucs2_t)in);
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*outbuf += sizeof (ucs2_t);
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*outbytesleft -= sizeof (ucs2_t);
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return sizeof (ucs2_t);
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}
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#endif /* ICONV_FROM_UCS_CES_UCS_2 */
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#if defined (ICONV_TO_UCS_CES_UCS_2)
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static ucs4_t
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_DEFUN(ucs_2_convert_to_ucs, (data, inbuf, inbytesleft),
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_VOID_PTR data,
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_CONST unsigned char **inbuf,
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size_t *inbytesleft)
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{
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ucs4_t res;
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if (*inbytesleft < sizeof (ucs2_t))
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return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
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if (*((int *)data) == UCS_2_BIG_ENDIAN)
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res = (ucs4_t)ICONV_BETOHS (*((ucs2_t *)(*inbuf)));
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else
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res = (ucs4_t)ICONV_LETOHS (*((ucs2_t *)(*inbuf)));
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if ((res >= 0x0000D800 && res <= 0x0000DFFF) /* Surrogate character */
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|| res >= 0x0000FFFE)
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return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
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*inbytesleft -= sizeof (ucs2_t);
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*inbuf += sizeof (ucs2_t);
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return res;
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}
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#endif /* ICONV_TO_UCS_CES_UCS_2 */
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static int
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_DEFUN(ucs_2_get_mb_cur_max, (data),
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_VOID_PTR data)
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{
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return 2;
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}
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#if defined (ICONV_TO_UCS_CES_UCS_2)
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_CONST iconv_to_ucs_ces_handlers_t
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_iconv_to_ucs_ces_handlers_ucs_2 =
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{
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ucs_2_init,
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ucs_2_close,
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ucs_2_get_mb_cur_max,
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NULL,
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NULL,
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NULL,
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ucs_2_convert_to_ucs
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};
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#endif
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#if defined (ICONV_FROM_UCS_CES_UCS_2)
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_CONST iconv_from_ucs_ces_handlers_t
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_iconv_from_ucs_ces_handlers_ucs_2 =
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{
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ucs_2_init,
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ucs_2_close,
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ucs_2_get_mb_cur_max,
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NULL,
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NULL,
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NULL,
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ucs_2_convert_from_ucs
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};
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#endif
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#endif /* ICONV_TO_UCS_CES_UCS_2 || ICONV_FROM_UCS_CES_UCS_2 */
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