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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
*/
#ifdef ENABLE_ICONV
#include "../lib/deps.h"
#ifdef ICONV_CONVERTER_UTF_16
#include <_ansi.h>
#include <string.h>
#include "../lib/local.h"
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)
{
unsigned char *cp;
int *state;
int bytes;
if (in == UCS_CHAR_NONE)
return 1; /* No state reinitialization for table charsets */
if (in > 0x10FFFF)
return -1;
bytes = *(state = (int *)(ces->data)) ? 2 : 4;
if (in > 0xFFFF)
bytes += 2;
if (*outbytesleft < bytes)
return 0; /* No space in the output buffer */
cp = *outbuf;
if (*state == 0) {
*cp++ = 0xFE;
*cp++ = 0xFF;
*state = 1;
}
if (in > 0xFFFF) {
*cp++ = ((in -= 0x10000) >> 18) | 0xD8;
*cp++ = (in >> 10) & 0xFF;
*cp++ = ((in >> 8) & 3) | 0xDC;
} else
*cp++ = (in >> 8) & 0xFF;
*cp++ = in & 0xFF;
(*outbuf) += bytes;
*outbytesleft -= bytes;
return 1;
}
static __inline ucs_t
_DEFUN(msb, (buf), _CONST unsigned char *buf)
{
return (buf[0] << 8) | buf[1];
}
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, res2;
int *state, mark;
if (*inbytesleft < 2)
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:
if (*state == 0)
*state = 1;
mark = 1;
break;
case UCS_CHAR_INVALID:
if (*state == 0)
*state = 2;
mark = 1;
break;
default:
if (*state == 0)
*state = 1;
mark = 0;
}
if (mark) {
if (*inbytesleft < 4)
return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
*inbytesleft -= 2;
res = msb((*inbuf) += 2);
}
if (*state == 2) { /* LSB order */
res = (*(*inbuf) ++);
res |= (*(*inbuf) ++) << 8;
} else
*inbuf += 2;
*inbytesleft -= 2;
if ((res & 0xFC00) != 0xD800) /* Non-surrogate character */
return res;
if (*inbytesleft < 2)
return UCS_CHAR_NONE; /* Not enough bytes in the input buffer */
if (*state == 2) {
res2 = (*inbuf)[0];
res2 |= (*inbuf)[1] << 8;
} else
res2 = msb(*inbuf);
if ((res2 & 0xFC00) != 0xDC00) /* Broken surrogate pair */
return -1;
(*inbuf) += 2;
(*inbytesleft) -= 2;
return (((res & 0x3FF) << 10) | (res2 & 0x3FF)) + 0x10000;
}
ICONV_CES_STATEFUL_MODULE_DECL(utf_16);
#endif /* #ifdef ICONV_CONVERTER_UTF_16 */
#endif /* #ifdef ENABLE_ICONV */
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