358 lines
10 KiB
C
358 lines
10 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 <_ansi.h>
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#include <reent.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "local.h"
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#include "conv.h"
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#include "ucsconv.h"
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static int fake_data;
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static int
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_EXFUN(find_encoding_name, (const char *searchee,
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const char **names));
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/*
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* UCS-based conversion interface functions implementation.
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*/
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static void *
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_DEFUN(ucs_based_conversion_open, (rptr, to, from),
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struct _reent *rptr,
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const char *to,
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const char *from)
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{
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iconv_ucs_conversion_t *uc;
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const iconv_to_ucs_ces_t *to_ucs_bices;
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const iconv_from_ucs_ces_t *from_ucs_bices;
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uc = (iconv_ucs_conversion_t *)
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_calloc_r (rptr, 1, sizeof (iconv_ucs_conversion_t));
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if (uc == NULL)
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return NULL;
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/*
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* Find CES converter for "from" encoding ("from" source encoding corresponds
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* to "to_ucs" CES converter).
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*/
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for (to_ucs_bices = &_iconv_to_ucs_ces[0];
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to_ucs_bices->names != NULL;
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to_ucs_bices++)
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{
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if (find_encoding_name (from, to_ucs_bices->names) == 0)
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break;
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}
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/*
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* Find CES converter for "to" encoding ("to" source encoding corresponds
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* to "from_ucs" CES converter).
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*/
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for (from_ucs_bices = &_iconv_from_ucs_ces[0];
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from_ucs_bices->names != NULL;
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from_ucs_bices++)
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{
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if (find_encoding_name (to, from_ucs_bices->names) == 0)
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break;
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}
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if (to_ucs_bices->names == NULL || from_ucs_bices->names == NULL)
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goto error;
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uc->to_ucs.handlers = to_ucs_bices->handlers;
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uc->from_ucs.handlers = from_ucs_bices->handlers;
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/* Initialize "to UCS" CES converter */
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if (to_ucs_bices->handlers->init != NULL)
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{
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uc->to_ucs.data = to_ucs_bices->handlers->init (rptr, from);
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if (uc->to_ucs.data == NULL)
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goto error;
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}
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else
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uc->to_ucs.data = (void *)&fake_data;
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/* Initialize "from UCS" CES converter */
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if (from_ucs_bices->handlers->init != NULL)
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{
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uc->from_ucs.data = from_ucs_bices->handlers->init (rptr, to);
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if (uc->from_ucs.data == NULL)
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goto error;
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}
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else
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uc->from_ucs.data = (void *)&fake_data;
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return uc;
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error:
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if (uc->to_ucs.data != NULL && uc->to_ucs.handlers->close != NULL)
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uc->to_ucs.handlers->close (rptr, uc->to_ucs.data);
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_free_r (rptr, (void *)uc);
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return NULL;
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}
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static size_t
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_DEFUN(ucs_based_conversion_close, (rptr, data),
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struct _reent *rptr,
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void *data)
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{
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iconv_ucs_conversion_t *uc;
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size_t res = 0;
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uc = (iconv_ucs_conversion_t *)data;
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if (uc->from_ucs.handlers->close != NULL)
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res = uc->from_ucs.handlers->close (rptr, uc->from_ucs.data);
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if (uc->to_ucs.handlers->close != NULL)
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res |= uc->to_ucs.handlers->close (rptr, uc->to_ucs.data);
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_free_r (rptr, (void *)data);
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return res;
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}
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static size_t
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_DEFUN(ucs_based_conversion_convert,
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(rptr, data, inbuf, inbytesleft, outbuf, outbytesleft, flags),
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struct _reent *rptr,
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void *data,
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const unsigned char **inbuf,
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size_t *inbytesleft,
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unsigned char **outbuf,
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size_t *outbytesleft,
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int flags)
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{
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unsigned char outbuf1[ICONV_MB_LEN_MAX];
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unsigned char *poutbuf1;
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size_t res = 0;
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iconv_ucs_conversion_t *uc = (iconv_ucs_conversion_t *)data;
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while (*inbytesleft > 0)
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{
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register size_t bytes;
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register ucs4_t ch;
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const unsigned char *inbuf_save = *inbuf;
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size_t inbyteslef_save = *inbytesleft;
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if (*outbytesleft == 0)
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{
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__errno_r (rptr) = E2BIG;
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return (size_t)-1;
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}
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ch = uc->to_ucs.handlers->convert_to_ucs (uc->to_ucs.data,
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inbuf, inbytesleft);
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if (ch == (ucs4_t)ICONV_CES_BAD_SEQUENCE)
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{
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__errno_r (rptr) = EINVAL;
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return (size_t)-1;
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}
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if (ch == (ucs4_t)ICONV_CES_INVALID_CHARACTER)
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{
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__errno_r (rptr) = EILSEQ;
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return (size_t)-1;
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}
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if (flags & ICONV_DONT_SAVE_BIT)
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{
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poutbuf1 = &outbuf1[0];
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outbuf = &poutbuf1;
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}
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bytes = uc->from_ucs.handlers->convert_from_ucs (uc->from_ucs.data, ch,
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outbuf, outbytesleft);
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if (bytes == (size_t)ICONV_CES_NOSPACE)
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{
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*inbuf = inbuf_save;
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*inbytesleft = inbyteslef_save;
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__errno_r (rptr) = E2BIG;
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return (size_t)-1;
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}
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else if (bytes == (size_t)ICONV_CES_INVALID_CHARACTER)
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{
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if (flags & ICONV_FAIL_BIT)
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{
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/* Generate error */
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__errno_r (rptr) = EILSEQ;
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return (size_t)-1;
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}
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/*
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* For this case SUSv3 stands: "if iconv() encounters a character in the
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* input buffer that is valid, but for which an identical character does
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* not exist in the target encoding, iconv() shall perform an
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* implementation-defined conversion on this character".
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* Don't generate error, just write default character.
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*/
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bytes = uc->from_ucs.handlers->convert_from_ucs (
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uc->from_ucs.data,
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(ucs4_t)DEFAULT_CHARACTER,
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outbuf,
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outbytesleft);
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if ((__int32_t)bytes < 0)
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{
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__errno_r (rptr) = E2BIG;
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return (size_t)-1;
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}
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res += 1;
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}
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}
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return res;
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}
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static int
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_DEFUN(ucs_based_conversion_get_mb_cur_max, (data, direction),
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void *data,
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int direction)
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{
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iconv_ucs_conversion_t *uc = (iconv_ucs_conversion_t *)data;
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if (direction == 0)
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return uc->to_ucs.handlers->get_mb_cur_max (uc->to_ucs.data);
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else
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return uc->from_ucs.handlers->get_mb_cur_max (uc->from_ucs.data);
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}
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static void
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_DEFUN(ucs_based_conversion_get_state, (data, state, direction),
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void *data,
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mbstate_t *state,
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int direction)
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{
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iconv_ucs_conversion_t *uc = (iconv_ucs_conversion_t *)data;
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mbstate_t nullstate = ICONV_ZERO_MB_STATE_T;
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if (direction == 0)
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{
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if (uc->to_ucs.handlers->get_state != NULL)
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uc->to_ucs.handlers->get_state (uc->to_ucs.data, state);
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else
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*state = nullstate; /* internal copy */
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}
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else
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{
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if (uc->from_ucs.handlers->get_state != NULL)
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uc->from_ucs.handlers->get_state (uc->from_ucs.data, state);
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else
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*state = nullstate; /* internal copy */
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}
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return;
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}
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static int
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_DEFUN(ucs_based_conversion_set_state, (data, state, direction),
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void *data,
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mbstate_t *state,
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int direction)
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{
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iconv_ucs_conversion_t *uc = (iconv_ucs_conversion_t *)data;
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if (direction == 0)
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{
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if (uc->to_ucs.handlers->set_state != NULL)
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return uc->to_ucs.handlers->set_state (uc->to_ucs.data, state);
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}
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else
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{
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if (uc->from_ucs.handlers->set_state != NULL)
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return uc->from_ucs.handlers->set_state (uc->from_ucs.data, state);
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}
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return 0;
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}
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static int
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_DEFUN(ucs_based_conversion_is_stateful, (data, direction),
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void *data,
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int direction)
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{
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iconv_ucs_conversion_t *uc = (iconv_ucs_conversion_t *)data;
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if (direction == 0)
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{
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if (uc->to_ucs.handlers->is_stateful != NULL)
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return uc->to_ucs.handlers->is_stateful (uc->to_ucs.data);
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}
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else
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{
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if (uc->from_ucs.handlers->is_stateful != NULL)
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return uc->from_ucs.handlers->is_stateful (uc->from_ucs.data);
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}
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return 0;
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}
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/* UCS-based conversion definition object */
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const iconv_conversion_handlers_t
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_iconv_ucs_conversion_handlers =
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{
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ucs_based_conversion_open,
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ucs_based_conversion_close,
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ucs_based_conversion_convert,
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ucs_based_conversion_get_state,
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ucs_based_conversion_set_state,
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ucs_based_conversion_get_mb_cur_max,
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ucs_based_conversion_is_stateful
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};
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/*
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* Supplementary functions.
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*/
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static int
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_DEFUN(find_encoding_name, (searchee, names),
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const char *searchee,
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const char **names)
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{
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const char *p;
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for (p = *names; p != NULL; p = *(names++))
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if (strcmp (p, searchee) == 0)
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return 0;
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return -1;
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}
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