1 /*
2 * Copyright (C) 1999-2001 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
4 *
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
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 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
18 * Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20
21 /*
22 * CP936 extensions
23 */
24
25 static const unsigned short cp936ext_2uni_pagea6[181-159] = {
26 /* 0xa6 */
27 0xfe35,
28 0xfe36, 0xfe39, 0xfe3a, 0xfe3f, 0xfe40, 0xfe3d, 0xfe3e, 0xfe41,
29 0xfe42, 0xfe43, 0xfe44, 0xfffd, 0xfffd, 0xfe3b, 0xfe3c, 0xfe37,
30 0xfe38, 0xfe31, 0xfffd, 0xfe33, 0xfe34,
31 };
32 static const unsigned short cp936ext_2uni_pagea8[128-122] = {
33 /* 0xa8 */
34 0x0251, 0xfffd, 0x0144, 0x0148, 0xfffd, 0x0261,
35 };
36
37 static int
cp936ext_mbtowc(conv_t conv,ucs4_t * pwc,const unsigned char * s,int n)38 cp936ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
39 {
40 unsigned char c1 = s[0];
41 if ((c1 == 0xa6) || (c1 == 0xa8)) {
42 if (n >= 2) {
43 unsigned char c2 = s[1];
44 if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xff)) {
45 unsigned int i = 190 * (c1 - 0x81) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40));
46 unsigned short wc = 0xfffd;
47 if (i < 7410) {
48 if (i >= 7189 && i < 7211)
49 wc = cp936ext_2uni_pagea6[i-7189];
50 } else {
51 if (i >= 7532 && i < 7538)
52 wc = cp936ext_2uni_pagea8[i-7532];
53 }
54 if (wc != 0xfffd) {
55 *pwc = (ucs4_t) wc;
56 return 2;
57 }
58 }
59 return RET_ILSEQ;
60 }
61 return RET_TOOFEW(0);
62 }
63 return RET_ILSEQ;
64 }
65
66 static const unsigned short cp936ext_page01[16] = {
67 0x0000, 0x0000, 0x0000, 0x0000, 0xa8bd, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/
68 0xa8be, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/
69 };
70 static const unsigned short cp936ext_page02[24] = {
71 0x0000, 0xa8bb, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/
72 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/
73 0x0000, 0xa8c0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/
74 };
75 static const unsigned short cp936ext_pagefe[24] = {
76 0x0000, 0xa6f2, 0x0000, 0xa6f4, 0xa6f5, 0xa6e0, 0xa6e1, 0xa6f0, /*0x30-0x37*/
77 0xa6f1, 0xa6e2, 0xa6e3, 0xa6ee, 0xa6ef, 0xa6e6, 0xa6e7, 0xa6e4, /*0x38-0x3f*/
78 0xa6e5, 0xa6e8, 0xa6e9, 0xa6ea, 0xa6eb, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/
79 };
80
81 static int
cp936ext_wctomb(conv_t conv,unsigned char * r,ucs4_t wc,int n)82 cp936ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
83 {
84 if (n >= 2) {
85 unsigned short c = 0;
86 if (wc >= 0x0140 && wc < 0x0150)
87 c = cp936ext_page01[wc-0x0140];
88 else if (wc >= 0x0250 && wc < 0x0268)
89 c = cp936ext_page02[wc-0x0250];
90 else if (wc >= 0xfe30 && wc < 0xfe48)
91 c = cp936ext_pagefe[wc-0xfe30];
92 if (c != 0) {
93 r[0] = (c >> 8); r[1] = (c & 0xff);
94 return 2;
95 }
96 return RET_ILUNI;
97 }
98 return RET_TOOSMALL;
99 }
100