1: /*
2: * Copyright (C) 1999-2002, 2004, 2016, 2019 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, see <https://www.gnu.org/licenses/>.
18: */
19:
20: /*
21: * TCVN-5712
22: */
23:
24: #include "flushwc.h"
25: #include "vietcomb.h"
26:
27: static const unsigned char tcvn_comb_table[] = {
28: 0xb0, 0xb3, 0xb2, 0xb1, 0xb4,
29: };
30:
31: /* The possible bases in viet_comp_table_data:
32: 0x0041..0x0045, 0x0047..0x0049, 0x004B..0x0050, 0x0052..0x0057,
33: 0x0059..0x005A, 0x0061..0x0065, 0x0067..0x0069, 0x006B..0x0070,
34: 0x0072..0x0077, 0x0079..0x007A, 0x00A5, 0x00C2, 0x00CA, 0x00D3..0x00D6,
35: 0x00DA, 0x00E2, 0x00EA, 0x00F3..0x00F6, 0x00FA, 0x0102..0x0103,
36: 0x0168..0x0169, 0x01A0..0x01A1, 0x01AF..0x01B0. */
37: static const unsigned int tcvn_comp_bases[] = {
38: 0x06fdfbbe, 0x06fdfbbe, 0x00000000, 0x00000020, 0x04780404, 0x04780404,
39: 0x0000000c, 0x00000000, 0x00000000, 0x00000300, 0x00000000, 0x00018003
40: };
41:
42: static const unsigned short tcvn_2uni_1[24] = {
43: /* 0x00 */
44: 0x0000, 0x00da, 0x1ee4, 0x0003, 0x1eea, 0x1eec, 0x1eee, 0x0007,
45: 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
46: /* 0x10 */
47: 0x0010, 0x1ee8, 0x1ef0, 0x1ef2, 0x1ef6, 0x1ef8, 0x00dd, 0x1ef4,
48: };
49: static const unsigned short tcvn_2uni_2[128] = {
50: /* 0x80 */
51: 0x00c0, 0x1ea2, 0x00c3, 0x00c1, 0x1ea0, 0x1eb6, 0x1eac, 0x00c8,
52: 0x1eba, 0x1ebc, 0x00c9, 0x1eb8, 0x1ec6, 0x00cc, 0x1ec8, 0x0128,
53: /* 0x90 */
54: 0x00cd, 0x1eca, 0x00d2, 0x1ece, 0x00d5, 0x00d3, 0x1ecc, 0x1ed8,
55: 0x1edc, 0x1ede, 0x1ee0, 0x1eda, 0x1ee2, 0x00d9, 0x1ee6, 0x0168,
56: /* 0xa0 */
57: 0x00a0, 0x0102, 0x00c2, 0x00ca, 0x00d4, 0x01a0, 0x01af, 0x0110,
58: 0x0103, 0x00e2, 0x00ea, 0x00f4, 0x01a1, 0x01b0, 0x0111, 0x1eb0,
59: /* 0xb0 */
60: 0x0300, 0x0309, 0x0303, 0x0301, 0x0323, 0x00e0, 0x1ea3, 0x00e3,
61: 0x00e1, 0x1ea1, 0x1eb2, 0x1eb1, 0x1eb3, 0x1eb5, 0x1eaf, 0x1eb4,
62: /* 0xc0 */
63: 0x1eae, 0x1ea6, 0x1ea8, 0x1eaa, 0x1ea4, 0x1ec0, 0x1eb7, 0x1ea7,
64: 0x1ea9, 0x1eab, 0x1ea5, 0x1ead, 0x00e8, 0x1ec2, 0x1ebb, 0x1ebd,
65: /* 0xd0 */
66: 0x00e9, 0x1eb9, 0x1ec1, 0x1ec3, 0x1ec5, 0x1ebf, 0x1ec7, 0x00ec,
67: 0x1ec9, 0x1ec4, 0x1ebe, 0x1ed2, 0x0129, 0x00ed, 0x1ecb, 0x00f2,
68: /* 0xe0 */
69: 0x1ed4, 0x1ecf, 0x00f5, 0x00f3, 0x1ecd, 0x1ed3, 0x1ed5, 0x1ed7,
70: 0x1ed1, 0x1ed9, 0x1edd, 0x1edf, 0x1ee1, 0x1edb, 0x1ee3, 0x00f9,
71: /* 0xf0 */
72: 0x1ed6, 0x1ee7, 0x0169, 0x00fa, 0x1ee5, 0x1eeb, 0x1eed, 0x1eef,
73: 0x1ee9, 0x1ef1, 0x1ef3, 0x1ef7, 0x1ef9, 0x00fd, 0x1ef5, 0x1ed0,
74: };
75:
76: /* In the TCVN to Unicode direction, the state contains a buffered
77: character, or 0 if none. */
78:
79: static int
80: tcvn_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
81: {
82: unsigned char c = *s;
83: unsigned short wc;
84: unsigned short last_wc;
85: if (c < 0x18)
86: wc = tcvn_2uni_1[c];
87: else if (c < 0x80)
88: wc = c;
89: else
90: wc = tcvn_2uni_2[c-0x80];
91: last_wc = conv->istate;
92: if (last_wc) {
93: if (wc >= 0x0300 && wc < 0x0340) {
94: /* See whether last_wc and wc can be combined. */
95: unsigned int k;
96: unsigned int i1, i2;
97: switch (wc) {
98: case 0x0300: k = 0; break;
99: case 0x0301: k = 1; break;
100: case 0x0303: k = 2; break;
101: case 0x0309: k = 3; break;
102: case 0x0323: k = 4; break;
103: default: abort();
104: }
105: i1 = viet_comp_table[k].idx;
106: i2 = i1 + viet_comp_table[k].len-1;
107: if (last_wc >= viet_comp_table_data[i1].base
108: && last_wc <= viet_comp_table_data[i2].base) {
109: unsigned int i;
110: for (;;) {
111: i = (i1+i2)>>1;
112: if (last_wc == viet_comp_table_data[i].base)
113: break;
114: if (last_wc < viet_comp_table_data[i].base) {
115: if (i1 == i)
116: goto not_combining;
117: i2 = i;
118: } else {
119: if (i1 != i)
120: i1 = i;
121: else {
122: i = i2;
123: if (last_wc == viet_comp_table_data[i].base)
124: break;
125: goto not_combining;
126: }
127: }
128: }
129: last_wc = viet_comp_table_data[i].composed;
130: /* Output the combined character. */
131: conv->istate = 0;
132: *pwc = (ucs4_t) last_wc;
133: return 1;
134: }
135: }
136: not_combining:
137: /* Output the buffered character. */
138: conv->istate = 0;
139: *pwc = (ucs4_t) last_wc;
140: return 0; /* Don't advance the input pointer. */
141: }
142: if (wc >= 0x0041 && wc <= 0x01b0
143: && ((tcvn_comp_bases[(wc - 0x0040) >> 5] >> (wc & 0x1f)) & 1)) {
144: /* wc is a possible match in viet_comp_table_data. Buffer it. */
145: conv->istate = wc;
146: return RET_TOOFEW(1);
147: } else {
148: /* Output wc immediately. */
149: *pwc = (ucs4_t) wc;
150: return 1;
151: }
152: }
153:
154: #define tcvn_flushwc normal_flushwc
155:
156: static const unsigned char tcvn_page00[96+184] = {
157: 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
158: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
159: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
160: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
161: 0x80, 0x83, 0xa2, 0x82, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
162: 0x87, 0x8a, 0xa3, 0x00, 0x8d, 0x90, 0x00, 0x00, /* 0xc8-0xcf */
163: 0x00, 0x00, 0x92, 0x95, 0xa4, 0x94, 0x00, 0x00, /* 0xd0-0xd7 */
164: 0x00, 0x9d, 0x01, 0x00, 0x00, 0x16, 0x00, 0x00, /* 0xd8-0xdf */
165: 0xb5, 0xb8, 0xa9, 0xb7, 0x00, 0x00, 0x00, 0x00, /* 0xe0-0xe7 */
166: 0xcc, 0xd0, 0xaa, 0x00, 0xd7, 0xdd, 0x00, 0x00, /* 0xe8-0xef */
167: 0x00, 0x00, 0xdf, 0xe3, 0xab, 0xe2, 0x00, 0x00, /* 0xf0-0xf7 */
168: 0x00, 0xef, 0xf3, 0x00, 0x00, 0xfd, 0x00, 0x00, /* 0xf8-0xff */
169: /* 0x0100 */
170: 0x00, 0x00, 0xa1, 0xa8, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
171: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
172: 0xa7, 0xae, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
173: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
174: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
175: 0x8f, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
176: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
177: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
178: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
179: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
180: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
181: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
182: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
183: 0x9f, 0xf2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
184: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
185: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
186: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
187: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
188: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
189: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
190: 0xa5, 0xac, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
191: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa6, /* 0xa8-0xaf */
192: 0xad, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
193: };
194: static const unsigned char tcvn_page03[40] = {
195: 0xb0, 0xb3, 0x00, 0xb2, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
196: 0x00, 0xb1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
197: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
198: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
199: 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
200: };
201: static const unsigned char tcvn_page1e[96] = {
202: 0x84, 0xb9, 0x81, 0xb6, 0xc4, 0xca, 0xc1, 0xc7, /* 0xa0-0xa7 */
203: 0xc2, 0xc8, 0xc3, 0xc9, 0x86, 0xcb, 0xc0, 0xbe, /* 0xa8-0xaf */
204: 0xaf, 0xbb, 0xba, 0xbc, 0xbf, 0xbd, 0x85, 0xc6, /* 0xb0-0xb7 */
205: 0x8b, 0xd1, 0x88, 0xce, 0x89, 0xcf, 0xda, 0xd5, /* 0xb8-0xbf */
206: 0xc5, 0xd2, 0xcd, 0xd3, 0xd9, 0xd4, 0x8c, 0xd6, /* 0xc0-0xc7 */
207: 0x8e, 0xd8, 0x91, 0xde, 0x96, 0xe4, 0x93, 0xe1, /* 0xc8-0xcf */
208: 0xff, 0xe8, 0xdb, 0xe5, 0xe0, 0xe6, 0xf0, 0xe7, /* 0xd0-0xd7 */
209: 0x97, 0xe9, 0x9b, 0xed, 0x98, 0xea, 0x99, 0xeb, /* 0xd8-0xdf */
210: 0x9a, 0xec, 0x9c, 0xee, 0x02, 0xf4, 0x9e, 0xf1, /* 0xe0-0xe7 */
211: 0x11, 0xf8, 0x04, 0xf5, 0x05, 0xf6, 0x06, 0xf7, /* 0xe8-0xef */
212: 0x12, 0xf9, 0x13, 0xfa, 0x17, 0xfe, 0x14, 0xfb, /* 0xf0-0xf7 */
213: 0x15, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xf8-0xff */
214: };
215:
216: static int
217: tcvn_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
218: {
219: unsigned char c = 0;
220: if (wc < 0x0080 && (wc >= 0x0020 || (0x00fe0076U & (1U << wc)) == 0)) {
221: *r = wc;
222: return 1;
223: }
224: else if (wc >= 0x00a0 && wc < 0x01b8)
225: c = tcvn_page00[wc-0x00a0];
226: else if (wc >= 0x0300 && wc < 0x0328)
227: c = tcvn_page03[wc-0x0300];
228: else if (wc >= 0x0340 && wc < 0x0342) /* deprecated Vietnamese tone marks */
229: c = tcvn_page03[wc-0x0340];
230: else if (wc >= 0x1ea0 && wc < 0x1f00)
231: c = tcvn_page1e[wc-0x1ea0];
232: if (c != 0) {
233: *r = c;
234: return 1;
235: }
236: /* Try compatibility or canonical decomposition. */
237: {
238: /* Binary search through viet_decomp_table. */
239: unsigned int i1 = 0;
240: unsigned int i2 = sizeof(viet_decomp_table)/sizeof(viet_decomp_table[0])-1;
241: if (wc >= viet_decomp_table[i1].composed
242: && wc <= viet_decomp_table[i2].composed) {
243: unsigned int i;
244: for (;;) {
245: /* Here i2 - i1 > 0. */
246: i = (i1+i2)>>1;
247: if (wc == viet_decomp_table[i].composed)
248: break;
249: if (wc < viet_decomp_table[i].composed) {
250: if (i1 == i)
251: return RET_ILUNI;
252: /* Here i1 < i < i2. */
253: i2 = i;
254: } else {
255: /* Here i1 <= i < i2. */
256: if (i1 != i)
257: i1 = i;
258: else {
259: /* Here i2 - i1 = 1. */
260: i = i2;
261: if (wc == viet_decomp_table[i].composed)
262: break;
263: else
264: return RET_ILUNI;
265: }
266: }
267: }
268: /* Found a compatibility or canonical decomposition. */
269: wc = viet_decomp_table[i].base;
270: /* wc is one of 0x0020, 0x0041..0x005a, 0x0061..0x007a, 0x00a5, 0x00a8,
271: 0x00c2, 0x00c5..0x00c7, 0x00ca, 0x00cf, 0x00d3, 0x00d4, 0x00d6,
272: 0x00d8, 0x00da, 0x00dc, 0x00e2, 0x00e5..0x00e7, 0x00ea, 0x00ef,
273: 0x00f3, 0x00f4, 0x00f6, 0x00f8, 0x00fc, 0x0102, 0x0103, 0x01a0,
274: 0x01a1, 0x01af, 0x01b0. */
275: if (wc < 0x0080)
276: c = wc;
277: else {
278: c = tcvn_page00[wc-0x00a0];
279: if (c == 0)
280: return RET_ILUNI;
281: }
282: if (n < 2)
283: return RET_TOOSMALL;
284: r[0] = c;
285: r[1] = tcvn_comb_table[viet_decomp_table[i].comb1];
286: return 2;
287: }
288: }
289: return RET_ILUNI;
290: }
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