128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/*-
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* Copyright (c) 1999,2000
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* 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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* iconv (Charset Conversion Library) v2.0
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*/
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#ifdef ENABLE_ICONV
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#include <_ansi.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <reent.h>
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#include "local.h"
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static int
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_DEFUN(table_init, (rptr, data, name, desc_data),
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struct _reent *rptr _AND
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_VOID_PTR *data _AND
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_CONST char *name _AND
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_CONST _VOID_PTR desc_data)
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{
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int res;
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struct iconv_ccs *ccs = _malloc_r(rptr, sizeof(struct iconv_ccs));
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if (ccs == NULL)
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return __errno_r(rptr);
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res = iconv_ccs_init(rptr, ccs, name);
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if (res)
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_free_r(rptr, ccs);
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else
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(struct iconv_ccs *)(*data) = ccs;
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return res;
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}
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static int
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_DEFUN(table_close, (rptr, data),
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struct _reent *rptr _AND
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_VOID_PTR data)
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{
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int res = 0;
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if (data != NULL)
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res = ((struct iconv_ccs *)data)->close(rptr, (struct iconv_ccs *)data);
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_free_r(rptr, data);
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return res;
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}
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static ssize_t
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_DEFUN(convert_from_ucs, (ces, in, outbuf, outbytesleft),
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struct iconv_ces *ces _AND
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ucs_t in _AND
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unsigned char **outbuf _AND
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size_t *outbytesleft)
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{
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ucs_t res;
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size_t bytes;
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if (in == UCS_CHAR_NONE)
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return 1; /* No state reinitialization for table charsets */
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if (iconv_char32bit(in))
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return -1;
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res = ICONV_CCS_CONVERT_FROM_UCS((struct iconv_ccs *)(ces->data), in);
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if (res == UCS_CHAR_INVALID)
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return -1; /* No character in output charset */
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bytes = res & 0xFF00 ? 2 : 1;
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if (*outbytesleft < bytes)
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return 0; /* No space in output buffer */
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if (bytes == 2)
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*(*outbuf)++ = (res >> 8) & 0xFF;
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*(*outbuf)++ = res & 0xFF;
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*outbytesleft -= bytes;
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return 1;
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}
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static ucs_t
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_DEFUN(convert_to_ucs, (ces, inbuf, inbytesleft),
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struct iconv_ces *ces _AND
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_CONST unsigned char **inbuf _AND
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size_t *inbytesleft)
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{
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struct iconv_ccs *ccsd = (struct iconv_ccs *)(ces->data);
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unsigned char byte = *(*inbuf);
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ucs_t res = ICONV_CCS_CONVERT_TO_UCS(ccsd, byte);
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size_t bytes = (res == UCS_CHAR_INVALID && ccsd->nbits > 8) ? 2 : 1;
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if (*inbytesleft < bytes)
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return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
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if (bytes == 2)
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res = ICONV_CCS_CONVERT_TO_UCS(ccsd, (byte << 8) | (* ++(*inbuf)));
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(*inbuf) ++;
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*inbytesleft -= bytes;
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return res;
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}
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_CONST struct iconv_ces_desc iconv_ces_table_driven = {
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table_init,
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table_close,
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iconv_ces_reset_null,
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convert_from_ucs,
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convert_to_ucs,
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NULL
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};
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#endif /* #ifdef ENABLE_ICONV */
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