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/*-
* Copyright (c) 1999,2000
* Konstantin Chuguev. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* iconv (Charset Conversion Library) v2.0
*/
#include "../lib/deps.h"
#ifdef _ICONV_CONVERTER_ISO_10646_UCS_4
#include "../lib/local.h"
#define out_char(ptr, ch) \
do { \
*(*(ptr))++ = ((ch) >> 24) & 0xFF; \
*(*(ptr))++ = ((ch) >> 16) & 0xFF; \
*(*(ptr))++ = ((ch) >> 8) & 0xFF; \
*(*(ptr))++ = (ch) & 0xFF; \
} while (0)
static ssize_t
_DEFUN(convert_from_ucs, (ces, in, outbuf, outbytesleft),
struct iconv_ces *ces _AND
ucs_t in _AND
unsigned char **outbuf _AND
size_t *outbytesleft)
{
int *state, bytes;
if (in == UCS_CHAR_NONE)
return 1; /* No state reinitialization for table charsets */
bytes = *(state = (int *)(ces->data)) ? 4 : 8;
if (*outbytesleft < bytes)
return 0; /* No space in output buffer */
if (*state == 0) { /* First character in sequence is byte order */
out_char(outbuf, UCS_CHAR_ZERO_WIDTH_NBSP);
*state = 1;
}
out_char(outbuf, in);
*outbytesleft -= bytes;
return 1;
}
static __inline ucs_t
_DEFUN(msb, (buf), _CONST unsigned char *buf)
{
return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}
static ucs_t
_DEFUN(convert_to_ucs, (ces, inbuf, inbytesleft),
struct iconv_ces *ces _AND
_CONST unsigned char **inbuf _AND
size_t *inbytesleft)
{
ucs_t res;
int *state, mark;
if (*inbytesleft < 4)
return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
state = (int *)(ces->data);
res = msb(*inbuf);
switch (res) {
case UCS_CHAR_ZERO_WIDTH_NBSP:
*state = 1;
mark = 1;
break;
case UCS_CHAR_INVALID:
*state = 2;
mark = 1;
break;
default:
mark = 0;
}
if (mark) {
if (*inbytesleft < 8)
return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
*inbytesleft -= 4;
*inbuf += 4;
if (*state != 2)
res = msb(*inbuf);
}
if (*state == 2) {
res = (unsigned char)(*(*inbuf) ++);
res |= (unsigned char)(*(*inbuf) ++) << 8;
res |= (unsigned char)(*(*inbuf) ++) << 16;
res |= (unsigned char)(*(*inbuf) ++) << 24;
} else
*inbuf += 4;
*inbytesleft -= 4;
return res;
}
ICONV_CES_STATEFUL_MODULE_DECL(iso_10646_ucs_4);
#endif /* #ifdef _ICONV_CONVERTER_ISO_10646_UCS_4 */
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