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/* vim:set et ts=4 sts=4:
*
* ibus-pinyin - The Chinese PinYin engine for IBus
*
* Copyright (c) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
* Copyright (c) 2010 BYVoid <byvoid1@gmail.com>
*
* This program 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; either version 2, or (at your option)
* any later version.
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "PYSimpTradConverter.h"
#ifdef HAVE_OPENCC
# include <opencc.h>
#else
# include <cstring>
# include <cstdlib>
#endif
#include "PYTypes.h"
#include "PYString.h"
namespace PY {
#ifdef HAVE_OPENCC
class opencc {
static const int BUFFER_SIZE = 64;
public:
opencc (void)
{
m_od = opencc_open (OPENCC_DEFAULT_CONFIG_SIMP_TO_TRAD);
g_assert (m_od != NULL);
}
~opencc (void)
{
opencc_close(m_od);
}
void convert (const gchar *in, String &out)
{
glong n_char;
gunichar *in_ucs4 = g_utf8_to_ucs4_fast (in, -1, &n_char);
ucs4_t *pinbuf = (ucs4_t *)in_ucs4;
size_t inbuf_left = n_char;
while (inbuf_left != 0) {
ucs4_t *poutbuf = (ucs4_t *)m_buffer;
size_t outbuf_left = BUFFER_SIZE;
size_t retval = opencc_convert(m_od, &pinbuf, &inbuf_left, &poutbuf, &outbuf_left);
if (retval == (size_t) -1) {
/* append left chars in pinbuf */
g_warning ("opencc_convert return failed");
out << (gunichar *) pinbuf;
break;
}
*poutbuf = L'\0';
out << m_buffer;
}
g_free (in_ucs4);
}
private:
opencc_t m_od;
gunichar m_buffer[BUFFER_SIZE + 1];
};
void
SimpTradConverter::simpToTrad (const gchar *in, String &out)
{
static opencc opencc;
opencc.convert (in, out);
}
#else
static gint _xcmp (const gchar *p1, const gchar *p2, const gchar *str)
{
for (;;) {
// both reach end
if (p1 == p2 && *str == '\0')
return 0;
// p1 reaches end
if (p1 == p2)
return -1;
// str reaches end
if (*str == '\0')
return 1;
if (*p1 < *str)
return -1;
if (*p1 > *str)
return 1;
p1 ++; str ++;
};
}
static gint _cmp (gconstpointer p1, gconstpointer p2)
{
const gchar **pp = (const gchar **) p1;
const gchar **s2 = (const gchar **) p2;
return _xcmp (pp[0], pp[1], s2[0]);
}
#include "PYSimpTradConverterTable.h"
void
SimpTradConverter::simpToTrad (const gchar *in, String &out)
{
const gchar *pend;
const gchar *pp[2];
glong len;
glong begin;
if (!g_utf8_validate (in, -1 , NULL)) {
g_warning ("\%s\" is not an utf8 string!", in);
g_assert_not_reached ();
}
begin = 0;
pend = in + std::strlen (in);
len = g_utf8_strlen (in, -1); // length in charactoers
pp[0] = in;
while (pp[0] != pend) {
glong slen = std::min (len - begin, (glong) SIMP_TO_TRAD_MAX_LEN); // the length of sub string in character
pp[1] = g_utf8_offset_to_pointer (pp[0], slen); // the end of sub string
for (;;) {
const gchar **result;
result = (const gchar **) std::bsearch (pp, simp_to_trad,
G_N_ELEMENTS (simp_to_trad), sizeof (simp_to_trad[0]),
_cmp);
if (result != NULL) {
// found item in table,
// append the trad to out and adjust pointers
out << result[1];
pp[0] = pp[1];
begin += slen;
break;
}
if (slen == 1) {
// if only one character left,
// append origin character to out and adjust pointers
out.append (pp[0], pp[1] - pp[0]);
pp[0] = pp[1];
begin += 1;
break;
}
// if more than on characters left,
// adjust pp[1] to previous character
pp[1] = g_utf8_prev_char (pp[1]);
slen--;
}
}
}
#endif
}
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