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168 lines
4.5 KiB
C
168 lines
4.5 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_4) \
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|| defined (ICONV_FROM_UCS_CES_UCS_4)
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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-4 is Big Endian. Bad codes are rejected.
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* Bad codes: 0x0000FFFF, 0x0000FFFE, 0x0000D800-0x0000DFFF,
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* 0x7FFFFFFF-0xFFFFFFFF.
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*/
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#define UCS_4_BIG_ENDIAN 0
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#define UCS_4_LITTLE_ENDIAN 1
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#define UCS_4 "ucs_4"
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#define UCS_4BE "ucs_4be"
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#define UCS_4LE "ucs_4le"
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static void *
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ucs_4_init (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 *)NULL;
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if (strcmp (encoding, UCS_4LE) == 0)
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*data = UCS_4_LITTLE_ENDIAN;
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else
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*data = UCS_4_BIG_ENDIAN;
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return (void *)data;
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}
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static size_t
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ucs_4_close (struct _reent *rptr,
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void *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_4)
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static size_t
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ucs_4_convert_from_ucs (void *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 > 0x7FFFFFFF || in == 0x0000FFFF || in == 0x0000FFFE)
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return (size_t)ICONV_CES_INVALID_CHARACTER;
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if (*outbytesleft < sizeof (ucs4_t))
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return (size_t)ICONV_CES_NOSPACE;
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if (*((int *)data) == UCS_4_BIG_ENDIAN)
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*((ucs4_t *)(*outbuf)) = ICONV_HTOBEL (in);
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else
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*((ucs4_t *)(*outbuf)) = ICONV_HTOLEL (in);
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*outbuf += sizeof (ucs4_t);
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*outbytesleft -= sizeof (ucs4_t);
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return sizeof (ucs4_t);
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}
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#endif /* ICONV_FROM_UCS_CES_UCS_4 */
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#if defined (ICONV_TO_UCS_CES_UCS_4)
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static ucs4_t
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ucs_4_convert_to_ucs (void *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 (ucs4_t))
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return (ucs4_t)ICONV_CES_BAD_SEQUENCE;
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if (*((int *)data) == UCS_4_BIG_ENDIAN)
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res = ICONV_BETOHL (*((ucs4_t *)(*inbuf)));
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else
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res = ICONV_LETOHL (*((ucs4_t *)(*inbuf)));
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if ((res >= 0x0000D800 && res <= 0x0000DFFF) /* Surrogate character */
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|| res > 0x7FFFFFFF || res == 0x0000FFFF || res == 0x0000FFFE)
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return (ucs4_t)ICONV_CES_INVALID_CHARACTER;
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*inbytesleft -= sizeof (ucs4_t);
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*inbuf += sizeof(ucs4_t);
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return res;
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}
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#endif /* ICONV_TO_UCS_CES_UCS_4 */
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static int
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ucs_4_get_mb_cur_max (void *data)
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{
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return 4;
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}
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#if defined (ICONV_TO_UCS_CES_UCS_4)
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const iconv_to_ucs_ces_handlers_t
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_iconv_to_ucs_ces_handlers_ucs_4 =
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{
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ucs_4_init,
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ucs_4_close,
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ucs_4_get_mb_cur_max,
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NULL,
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NULL,
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NULL,
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ucs_4_convert_to_ucs
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};
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#endif
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#if defined (ICONV_FROM_UCS_CES_UCS_4)
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const iconv_from_ucs_ces_handlers_t
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_iconv_from_ucs_ces_handlers_ucs_4 =
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{
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ucs_4_init,
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ucs_4_close,
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ucs_4_get_mb_cur_max,
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NULL,
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NULL,
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NULL,
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ucs_4_convert_from_ucs
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};
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#endif
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#endif /* ICONV_TO_UCS_CES_UCS_4 || ICONV_FROM_UCS_CES_UCS_4 */
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