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: * CP950 extensions
23: */
24:
25: static const unsigned short cp950ext_2uni_pagef9[157-116] = {
26: /* 0xf9 */
27: 0x7881, 0x92b9, 0x88cf, 0x58bb,
28: 0x6052, 0x7ca7, 0x5afa, 0x2554, 0x2566, 0x2557, 0x2560, 0x256c,
29: 0x2563, 0x255a, 0x2569, 0x255d, 0x2552, 0x2564, 0x2555, 0x255e,
30: 0x256a, 0x2561, 0x2558, 0x2567, 0x255b, 0x2553, 0x2565, 0x2556,
31: 0x255f, 0x256b, 0x2562, 0x2559, 0x2568, 0x255c, 0x2551, 0x2550,
32: 0x256d, 0x256e, 0x2570, 0x256f, 0x2593,
33: };
34:
35: static int
36: cp950ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
37: {
38: unsigned char c1 = s[0];
39: if ((c1 == 0xf9)) {
40: if (n >= 2) {
41: unsigned char c2 = s[1];
42: if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {
43: unsigned int i = 157 * (c1 - 0xa1) + (c2 - (c2 >= 0xa1 ? 0x62 : 0x40));
44: unsigned short wc = 0xfffd;
45: {
46: if (i >= 13932 && i < 13973)
47: wc = cp950ext_2uni_pagef9[i-13932];
48: }
49: if (wc != 0xfffd) {
50: *pwc = (ucs4_t) wc;
51: return 2;
52: }
53: }
54: return RET_ILSEQ;
55: }
56: return RET_TOOFEW(0);
57: }
58: return RET_ILSEQ;
59: }
60:
61: static const unsigned short cp950ext_2charset[41] = {
62: 0xf9f9, 0xf9f8, 0xf9e6, 0xf9ef, 0xf9dd, 0xf9e8, 0xf9f1, 0xf9df,
63: 0xf9ec, 0xf9f5, 0xf9e3, 0xf9ee, 0xf9f7, 0xf9e5, 0xf9e9, 0xf9f2,
64: 0xf9e0, 0xf9eb, 0xf9f4, 0xf9e2, 0xf9e7, 0xf9f0, 0xf9de, 0xf9ed,
65: 0xf9f6, 0xf9e4, 0xf9ea, 0xf9f3, 0xf9e1, 0xf9fa, 0xf9fb, 0xf9fd,
66: 0xf9fc, 0xf9fe, 0xf9d9, 0xf9dc, 0xf9da, 0xf9d6, 0xf9db, 0xf9d8,
67: 0xf9d7,
68: };
69:
70: static const Summary16 cp950ext_uni2indx_page25[10] = {
71: /* 0x2500 */
72: { 0, 0x0000 }, { 0, 0x0000 }, { 0, 0x0000 }, { 0, 0x0000 },
73: { 0, 0x0000 }, { 0, 0xffff }, { 16, 0xffff }, { 32, 0x0001 },
74: { 33, 0x0000 }, { 33, 0x0008 },
75: };
76: static const Summary16 cp950ext_uni2indx_page58[12] = {
77: /* 0x5800 */
78: { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0000 },
79: { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0000 },
80: { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0000 }, { 34, 0x0800 },
81: };
82: static const Summary16 cp950ext_uni2indx_page5a[16] = {
83: /* 0x5a00 */
84: { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 },
85: { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 },
86: { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 },
87: { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0000 }, { 35, 0x0400 },
88: };
89: static const Summary16 cp950ext_uni2indx_page60[6] = {
90: /* 0x6000 */
91: { 36, 0x0000 }, { 36, 0x0000 }, { 36, 0x0000 }, { 36, 0x0000 },
92: { 36, 0x0000 }, { 36, 0x0004 },
93: };
94: static const Summary16 cp950ext_uni2indx_page78[9] = {
95: /* 0x7800 */
96: { 37, 0x0000 }, { 37, 0x0000 }, { 37, 0x0000 }, { 37, 0x0000 },
97: { 37, 0x0000 }, { 37, 0x0000 }, { 37, 0x0000 }, { 37, 0x0000 },
98: { 37, 0x0002 },
99: };
100: static const Summary16 cp950ext_uni2indx_page7c[11] = {
101: /* 0x7c00 */
102: { 38, 0x0000 }, { 38, 0x0000 }, { 38, 0x0000 }, { 38, 0x0000 },
103: { 38, 0x0000 }, { 38, 0x0000 }, { 38, 0x0000 }, { 38, 0x0000 },
104: { 38, 0x0000 }, { 38, 0x0000 }, { 38, 0x0080 },
105: };
106: static const Summary16 cp950ext_uni2indx_page88[13] = {
107: /* 0x8800 */
108: { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 },
109: { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 },
110: { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 }, { 39, 0x0000 },
111: { 39, 0x8000 },
112: };
113: static const Summary16 cp950ext_uni2indx_page92[12] = {
114: /* 0x9200 */
115: { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0000 },
116: { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0000 },
117: { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0000 }, { 40, 0x0200 },
118: };
119:
120: static int
121: cp950ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
122: {
123: if (n >= 2) {
124: const Summary16 *summary = NULL;
125: if (wc >= 0x2500 && wc < 0x25a0)
126: summary = &cp950ext_uni2indx_page25[(wc>>4)-0x250];
127: else if (wc >= 0x5800 && wc < 0x58c0)
128: summary = &cp950ext_uni2indx_page58[(wc>>4)-0x580];
129: else if (wc >= 0x5a00 && wc < 0x5b00)
130: summary = &cp950ext_uni2indx_page5a[(wc>>4)-0x5a0];
131: else if (wc >= 0x6000 && wc < 0x6060)
132: summary = &cp950ext_uni2indx_page60[(wc>>4)-0x600];
133: else if (wc >= 0x7800 && wc < 0x7890)
134: summary = &cp950ext_uni2indx_page78[(wc>>4)-0x780];
135: else if (wc >= 0x7c00 && wc < 0x7cb0)
136: summary = &cp950ext_uni2indx_page7c[(wc>>4)-0x7c0];
137: else if (wc >= 0x8800 && wc < 0x88d0)
138: summary = &cp950ext_uni2indx_page88[(wc>>4)-0x880];
139: else if (wc >= 0x9200 && wc < 0x92c0)
140: summary = &cp950ext_uni2indx_page92[(wc>>4)-0x920];
141: if (summary) {
142: unsigned short used = summary->used;
143: unsigned int i = wc & 0x0f;
144: if (used & ((unsigned short) 1 << i)) {
145: unsigned short c;
146: /* Keep in `used' only the bits 0..i-1. */
147: used &= ((unsigned short) 1 << i) - 1;
148: /* Add `summary->indx' and the number of bits set in `used'. */
149: used = (used & 0x5555) + ((used & 0xaaaa) >> 1);
150: used = (used & 0x3333) + ((used & 0xcccc) >> 2);
151: used = (used & 0x0f0f) + ((used & 0xf0f0) >> 4);
152: used = (used & 0x00ff) + (used >> 8);
153: c = cp950ext_2charset[summary->indx + used];
154: r[0] = (c >> 8); r[1] = (c & 0xff);
155: return 2;
156: }
157: }
158: return RET_ILUNI;
159: }
160: return RET_TOOSMALL;
161: }
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