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[libiconv.git] / lib / cns11643_4.h
blob5aa04a05cfa70fc72ad0036f0774935f1c9eddaf
1 /*
2 * Copyright (C) 1999-2001, 2016 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either version 2.1
8 * of the License, or (at your option) any later version.
10 * The GNU LIBICONV Library is distributed in the hope that it will be
11 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, see <https://www.gnu.org/licenses/>.
21 * CNS 11643-1992 plane 4
25 * The table has been split into two parts. Each part's entries fit it 16 bits.
26 * But the combined table would need 17 bits per entry.
28 #include "cns11643_4a.h"
29 #include "cns11643_4b.h"
31 static int
32 cns11643_4_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
34 unsigned char c1 = s[0];
35 if ((c1 >= 0x21 && c1 <= 0x6e)) {
36 if (n >= 2) {
37 unsigned char c2 = s[1];
38 if (c2 >= 0x21 && c2 < 0x7f) {
39 unsigned int i = 94 * (c1 - 0x21) + (c2 - 0x21);
40 ucs4_t wc = 0xfffd;
41 unsigned short swc;
43 if (i < 2914)
44 swc = cns11643_4a_2uni_page21[i],
45 wc = cns11643_4a_2uni_upages[swc>>8] | (swc & 0xff);
46 else if (i < 7298)
47 swc = cns11643_4b_2uni_page40[i-2914],
48 wc = cns11643_4b_2uni_upages[swc>>8] | (swc & 0xff);
50 if (wc != 0xfffd) {
51 *pwc = wc;
52 return 2;
55 return RET_ILSEQ;
57 return RET_TOOFEW(0);
59 return RET_ILSEQ;