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/*
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#include "langfunc.h"
#include <stdarg.h>
/* WIDE identity */
#define next_wchar_begin(ptr) ((char *)( ((wchar_t *)(ptr)) + 1 ))
unichar eh_decode_char__widewrapper(__constcharptr *src_begin_ptr, const char *src_buf_end, ...)
{
if (next_wchar_begin(src_begin_ptr[0]) > src_buf_end)
{
if (src_begin_ptr[0] > src_buf_end)
return UNICHAR_EOD;
return UNICHAR_NO_DATA;
}
else
{
const wchar_t *src_begin_wptr = (const wchar_t *)(src_begin_ptr[0]);
unsigned char prefetch[MAX_ENCODED_CHAR];
unsigned char *prefetch_tail = prefetch;
unsigned char *prefetch_end = prefetch;
size_t prefetch_ctr;
unichar res_uchar;
va_list tail;
encoding_handler_t *my_eh;
encoding_handler_t *inner_eh;
int *state_ptr;
va_start (tail, src_buf_end);
my_eh = va_arg (tail, encoding_handler_t *);
state_ptr = va_arg (tail, int *);
va_end (tail);
inner_eh = (encoding_handler_t *)(my_eh->eh_appdata);
for (prefetch_ctr = 0;
((prefetch_ctr < inner_eh->eh_maxsize) &&
next_wchar_begin (src_begin_wptr+prefetch_ctr) <= src_buf_end);
prefetch_ctr++ )
{
wchar_t wc = src_begin_wptr[prefetch_ctr];
if (wc & ~0xFF)
return UNICHAR_BAD_ENCODING;
(prefetch_end++)[0] = (unsigned char)wc;
}
res_uchar = inner_eh->eh_decode_char ((const char **)(&prefetch_tail), (char *)prefetch_end, inner_eh, state_ptr);
src_begin_ptr[0] = (char *)(((wchar_t *)(src_begin_ptr[0])) + (prefetch_tail-prefetch));
return res_uchar;
}
}
char *eh_encode_char__widewrapper (unichar char_to_put, char *tgt_buf, char *tgt_buf_end, ...)
{
if (char_to_put < 0)
return tgt_buf;
if (tgt_buf_end < next_wchar_begin(tgt_buf))
return (char *)UNICHAR_NO_ROOM;
((wchar_t *)(tgt_buf))[0] = (wchar_t)('?');
return next_wchar_begin(tgt_buf);
}
int eh_decode_buffer__widewrapper (unichar *tgt_buf, int tgt_buf_len, __constcharptr *src_begin_ptr, const char *src_buf_end, ...)
{
int res = 0;
const wchar_t *src_begin_wptr;
unsigned char prefetch[MAX_ENCODED_CHAR];
unsigned char *prefetch_tail;
unsigned char *prefetch_end;
size_t prefetch_ctr;
unichar res_uchar;
va_list tail;
encoding_handler_t *my_eh;
encoding_handler_t *inner_eh;
int *state_ptr;
va_start (tail, src_buf_end);
my_eh = va_arg (tail, encoding_handler_t *);
state_ptr = va_arg (tail, int *);
va_end (tail);
inner_eh = (encoding_handler_t *)(my_eh->eh_appdata);
while((tgt_buf_len>0) && (next_wchar_begin(src_begin_ptr[0]) <= src_buf_end))
{
src_begin_wptr = (const wchar_t *)(src_begin_ptr[0]);
prefetch_tail = prefetch;
prefetch_end = prefetch;
for (prefetch_ctr = 0;
((prefetch_ctr < inner_eh->eh_maxsize) &&
next_wchar_begin (src_begin_wptr+prefetch_ctr) <= src_buf_end);
prefetch_ctr++ )
{
wchar_t wc = src_begin_wptr[prefetch_ctr];
if (wc & ~0xFF)
return UNICHAR_BAD_ENCODING;
(prefetch_end++)[0] = (unsigned char)wc;
}
res_uchar = inner_eh->eh_decode_char ((const char **)(&prefetch_tail), (char *)prefetch_end, inner_eh, state_ptr);
switch (res_uchar)
{
case UNICHAR_BAD_ENCODING:
case UNICHAR_EOD:
return res_uchar;
case UNICHAR_NO_DATA:
src_begin_ptr[0] = (char *)(((wchar_t *)(src_begin_ptr[0])) + (prefetch_tail-prefetch));
return res;
default: /* nop */ ;
}
src_begin_ptr[0] = (char *)(((wchar_t *)(src_begin_ptr[0])) + (prefetch_tail-prefetch));
(tgt_buf++)[0] = res_uchar;
tgt_buf_len--;
res++;
}
if (src_begin_ptr[0] > src_buf_end)
return UNICHAR_EOD;
return res;
}
int eh_decode_buffer_to_wchar__widewrapper (wchar_t *tgt_buf, int tgt_buf_len, __constcharptr *src_begin_ptr, const char *src_buf_end, ...)
{
int res = 0;
const wchar_t *src_begin_wptr;
unsigned char prefetch[MAX_ENCODED_CHAR];
unsigned char *prefetch_tail;
unsigned char *prefetch_end;
size_t prefetch_ctr;
unichar res_uchar;
va_list tail;
encoding_handler_t *my_eh;
encoding_handler_t *inner_eh;
int *state_ptr;
va_start (tail, src_buf_end);
my_eh = va_arg (tail, encoding_handler_t *);
state_ptr = va_arg (tail, int *);
va_end (tail);
inner_eh = (encoding_handler_t *)(my_eh->eh_appdata);
while((tgt_buf_len>0) && (next_wchar_begin(src_begin_ptr[0]) <= src_buf_end))
{
src_begin_wptr = (const wchar_t *)(src_begin_ptr[0]);
prefetch_tail = prefetch;
prefetch_end = prefetch;
for (prefetch_ctr = 0;
((prefetch_ctr < inner_eh->eh_maxsize) &&
next_wchar_begin (src_begin_wptr+prefetch_ctr) <= src_buf_end);
prefetch_ctr++ )
{
wchar_t wc = src_begin_wptr[prefetch_ctr];
if (wc & ~0xFF)
return UNICHAR_BAD_ENCODING;
(prefetch_end++)[0] = (unsigned char)wc;
}
res_uchar = inner_eh->eh_decode_char ((const char **)(&prefetch_tail), (char *)prefetch_end, inner_eh, state_ptr);
switch (res_uchar)
{
case UNICHAR_BAD_ENCODING:
case UNICHAR_EOD:
return res_uchar;
case UNICHAR_NO_DATA:
src_begin_ptr[0] = (char *)(((wchar_t *)(src_begin_ptr[0])) + (prefetch_tail-prefetch));
return res;
default:
if (res & ~0xffffl)
return UNICHAR_OUT_OF_WCHAR;
}
src_begin_ptr[0] = (char *)(((wchar_t *)(src_begin_ptr[0])) + (prefetch_tail-prefetch));
(tgt_buf++)[0] = res_uchar;
tgt_buf_len--;
res++;
}
if (src_begin_ptr[0] > src_buf_end)
return UNICHAR_EOD;
return res;
}
char *eh_encode_buffer__widewrapper (const unichar *src_buf, const unichar *src_buf_end, char *tgt_buf, char *tgt_buf_end, ...)
{
unichar char_to_put;
if ((((wchar_t *)tgt_buf_end) - ((wchar_t *)tgt_buf)) < (src_buf_end-src_buf))
return (char *)UNICHAR_NO_ROOM;
while (src_buf < src_buf_end)
{
char_to_put = (src_buf++)[0];
((wchar_t *)(tgt_buf))[0] = (wchar_t)('?');
tgt_buf = next_wchar_begin(tgt_buf);
}
return tgt_buf;
}
char *eh_encode_wchar_buffer__widewrapper (const wchar_t *src_buf, const wchar_t *src_buf_end, char *tgt_buf, char *tgt_buf_end, ...)
{
unichar char_to_put;
if ((((wchar_t *)tgt_buf_end) - ((wchar_t *)tgt_buf)) < (src_buf_end-src_buf))
return (char *)UNICHAR_NO_ROOM;
while (src_buf < src_buf_end)
{
char_to_put = (src_buf++)[0];
((wchar_t *)(tgt_buf))[0] = (wchar_t)('?');
tgt_buf = next_wchar_begin(tgt_buf);
}
return tgt_buf;
}
encoding_handler_t *eh_wide_from_narrow (encoding_handler_t *eh_narrow)
{
encoding_handler_t *res = NULL;
#ifndef __NO_LIBDK
static dk_mutex_t *mtx = NULL;
static dk_hash_t *cache = NULL;
if (NULL == mtx)
{
mtx = mutex_allocate();
cache = hash_table_allocate(31);
}
mutex_enter (mtx);
res = (encoding_handler_t *) gethash (eh_narrow, cache);
if (NULL != res)
goto res_is_prepared;
#endif
res = (encoding_handler_t *)dk_alloc(sizeof(encoding_handler_t));
memcpy (res, eh_narrow, sizeof(encoding_handler_t));
res->eh_minsize *= sizeof (wchar_t);
res->eh_maxsize *= sizeof (wchar_t);
res->eh_byteorder = 0;
res->eh_encodedlangs = NULL;
res->eh_appdata = eh_narrow;
res->eh_decode_char = eh_decode_char__widewrapper;
res->eh_decode_buffer = eh_decode_buffer__widewrapper;
res->eh_decode_buffer_to_wchar = eh_decode_buffer_to_wchar__widewrapper;
res->eh_encode_char = eh_encode_char__widewrapper;
res->eh_encode_buffer = eh_encode_buffer__widewrapper;
res->eh_encode_wchar_buffer = eh_encode_wchar_buffer__widewrapper;
#ifndef __NO_LIBDK
sethash (eh_narrow, cache, res);
res_is_prepared:
mutex_leave (mtx);
#endif
return res;
}
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