118 lines
3.9 KiB
C
118 lines
3.9 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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#include "../lib/deps.h"
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#ifdef _ICONV_CONVERTER_ISO_10646_UCS_4
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#include "../lib/local.h"
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#define out_char(ptr, ch) \
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do { \
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*(*(ptr))++ = ((ch) >> 24) & 0xFF; \
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*(*(ptr))++ = ((ch) >> 16) & 0xFF; \
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*(*(ptr))++ = ((ch) >> 8) & 0xFF; \
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*(*(ptr))++ = (ch) & 0xFF; \
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} while (0)
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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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int *state, 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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bytes = *(state = (int *)(ces->data)) ? 4 : 8;
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if (*outbytesleft < bytes)
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return 0; /* No space in output buffer */
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if (*state == 0) { /* First character in sequence is byte order */
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out_char(outbuf, UCS_CHAR_ZERO_WIDTH_NBSP);
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*state = 1;
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}
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out_char(outbuf, in);
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*outbytesleft -= bytes;
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return 1;
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}
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static __inline ucs_t
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_DEFUN(msb, (buf), _CONST unsigned char *buf)
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{
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return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
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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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ucs_t res;
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int *state, mark;
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if (*inbytesleft < 4)
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return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
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state = (int *)(ces->data);
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res = msb(*inbuf);
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switch (res) {
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case UCS_CHAR_ZERO_WIDTH_NBSP:
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*state = 1;
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mark = 1;
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break;
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case UCS_CHAR_INVALID:
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*state = 2;
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mark = 1;
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break;
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default:
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mark = 0;
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}
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if (mark) {
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if (*inbytesleft < 8)
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return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
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*inbytesleft -= 4;
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*inbuf += 4;
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if (*state != 2)
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res = msb(*inbuf);
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}
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if (*state == 2) {
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res = (unsigned char)(*(*inbuf) ++);
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res |= (unsigned char)(*(*inbuf) ++) << 8;
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res |= (unsigned char)(*(*inbuf) ++) << 16;
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res |= (unsigned char)(*(*inbuf) ++) << 24;
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} else
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*inbuf += 4;
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*inbytesleft -= 4;
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return res;
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}
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ICONV_CES_STATEFUL_MODULE_DECL(iso_10646_ucs_4);
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#endif /* #ifdef _ICONV_CONVERTER_ISO_10646_UCS_4 */
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