euc_tw.h
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/*
* Copyright (C) 1999-2001, 2016 Free Software Foundation, Inc.
* This file is part of the GNU LIBICONV Library.
*
* The GNU LIBICONV Library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* The GNU LIBICONV Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
* If not, see <http://www.gnu.org/licenses/>.
*/
/*
* EUC-TW
*/
static int
euc_tw_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
{
unsigned char c = *s;
/* Code set 0 (ASCII) */
if (c < 0x80)
return ascii_mbtowc(conv,pwc,s,n);
/* Code set 1 (CNS 11643-1992 Plane 1) */
if (c >= 0xa1 && c < 0xff) {
if (n < 2)
return RET_TOOFEW(0);
{
unsigned char c2 = s[1];
if (c2 >= 0xa1 && c2 < 0xff) {
unsigned char buf[2];
buf[0] = c-0x80; buf[1] = c2-0x80;
return cns11643_1_mbtowc(conv,pwc,buf,2);
} else
return RET_ILSEQ;
}
}
/* Code set 2 (CNS 11643-1992 Planes 1-16) */
if (c == 0x8e) {
if (n < 4)
return RET_TOOFEW(0);
{
unsigned char c2 = s[1];
if (c2 >= 0xa1 && c2 <= 0xb0) {
unsigned char c3 = s[2];
unsigned char c4 = s[3];
if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
unsigned char buf[2];
int ret;
buf[0] = c3-0x80; buf[1] = c4-0x80;
switch (c2-0xa0) {
case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break;
case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break;
case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break;
case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break;
case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break;
default: return RET_ILSEQ;
}
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 2) abort();
return 4;
}
}
}
}
return RET_ILSEQ;
}
static int
euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
{
unsigned char buf[3];
int ret;
/* Code set 0 (ASCII) */
ret = ascii_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
ret = cns11643_wctomb(conv,buf,wc,3);
if (ret != RET_ILUNI) {
if (ret != 3) abort();
/* Code set 1 (CNS 11643-1992 Plane 1) */
if (buf[0] == 1) {
if (n < 2)
return RET_TOOSMALL;
r[0] = buf[1]+0x80;
r[1] = buf[2]+0x80;
return 2;
}
/* Code set 2 (CNS 11643-1992 Planes 1-16) */
if (n < 4)
return RET_TOOSMALL;
r[0] = 0x8e;
r[1] = buf[0]+0xa0;
r[2] = buf[1]+0x80;
r[3] = buf[2]+0x80;
return 4;
}
return RET_ILUNI;
}