115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
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/*
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* Copyright (C) 2001, 2005, 2016 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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* DEC-HANYU
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*/
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static int
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dec_hanyu_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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unsigned char c = *s;
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/* Code set 0 (ASCII) */
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if (c < 0x80)
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return ascii_mbtowc(conv,pwc,s,n);
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/* Code set 1 (CNS 11643-1992 Plane 1),
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Code set 2 (CNS 11643-1992 Plane 2),
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Code set 3 (CNS 11643-1992 Plane 3) */
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if (c >= 0xa1 && c < 0xff) {
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if (n < 2)
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return RET_TOOFEW(0);
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{
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unsigned char c2 = s[1];
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if (c == 0xc2 && c2 == 0xcb) {
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if (n < 4)
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return RET_TOOFEW(0);
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if (s[2] >= 0xa1 && s[2] < 0xff && s[3] >= 0xa1 && s[3] < 0xff) {
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unsigned char buf[2];
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int ret;
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buf[0] = s[2]-0x80; buf[1] = s[3]-0x80;
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ret = cns11643_3_mbtowc(conv,pwc,buf,2);
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if (ret != RET_ILSEQ) {
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if (ret != 2) abort();
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return 4;
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}
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}
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} else if (c2 >= 0xa1 && c2 < 0xff) {
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if (c != 0xc2 || c2 < 0xc2) {
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unsigned char buf[2];
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buf[0] = c-0x80; buf[1] = c2-0x80;
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return cns11643_1_mbtowc(conv,pwc,buf,2);
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}
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} else if (c2 >= 0x21 && c2 < 0x7f) {
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unsigned char buf[2];
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buf[0] = c-0x80; buf[1] = c2;
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return cns11643_2_mbtowc(conv,pwc,buf,2);
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}
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}
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}
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return RET_ILSEQ;
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}
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static int
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dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
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{
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unsigned char buf[3];
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int ret;
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/* Code set 0 (ASCII) */
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ret = ascii_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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ret = cns11643_wctomb(conv,buf,wc,3);
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if (ret != RET_ILUNI) {
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if (ret != 3) abort();
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/* Code set 1 (CNS 11643-1992 Plane 1) */
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if (buf[0] == 1 && (buf[1] != 0x42 || buf[2] < 0x42)) {
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if (n < 2)
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return RET_TOOSMALL;
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r[0] = buf[1]+0x80;
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r[1] = buf[2]+0x80;
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return 2;
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}
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/* Code set 2 (CNS 11643-1992 Plane 2) */
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if (buf[0] == 2) {
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if (n < 2)
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return RET_TOOSMALL;
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r[0] = buf[1]+0x80;
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r[1] = buf[2];
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return 2;
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}
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/* Code set 3 (CNS 11643-1992 Plane 3) */
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if (buf[0] == 3) {
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if (n < 4)
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return RET_TOOSMALL;
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r[0] = 0xc2;
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r[1] = 0xcb;
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r[2] = buf[1]+0x80;
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r[3] = buf[2]+0x80;
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return 4;
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}
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}
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return RET_ILUNI;
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}
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