Annotation of embedaddon/libiconv/lib/tcvn.h, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 1999-2002, 2004 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: * TCVN-5712
23: */
24:
25: #include "flushwc.h"
26: #include "vietcomb.h"
27:
28: static const unsigned char tcvn_comb_table[] = {
29: 0xb0, 0xb3, 0xb2, 0xb1, 0xb4,
30: };
31:
32: /* The possible bases in viet_comp_table_data:
33: 0x0041..0x0045, 0x0047..0x0049, 0x004B..0x0050, 0x0052..0x0057,
34: 0x0059..0x005A, 0x0061..0x0065, 0x0067..0x0069, 0x006B..0x0070,
35: 0x0072..0x0077, 0x0079..0x007A, 0x00A5, 0x00C2, 0x00CA, 0x00D3..0x00D6,
36: 0x00DA, 0x00E2, 0x00EA, 0x00F3..0x00F6, 0x00FA, 0x0102..0x0103,
37: 0x0168..0x0169, 0x01A0..0x01A1, 0x01AF..0x01B0. */
38: static const unsigned int tcvn_comp_bases[] = {
39: 0x06fdfbbe, 0x06fdfbbe, 0x00000000, 0x00000020, 0x04780404, 0x04780404,
40: 0x0000000c, 0x00000000, 0x00000000, 0x00000300, 0x00000000, 0x00018003
41: };
42:
43: static const unsigned short tcvn_2uni_1[24] = {
44: /* 0x00 */
45: 0x0000, 0x00da, 0x1ee4, 0x0003, 0x1eea, 0x1eec, 0x1eee, 0x0007,
46: 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
47: /* 0x10 */
48: 0x0010, 0x1ee8, 0x1ef0, 0x1ef2, 0x1ef6, 0x1ef8, 0x00dd, 0x1ef4,
49: };
50: static const unsigned short tcvn_2uni_2[128] = {
51: /* 0x80 */
52: 0x00c0, 0x1ea2, 0x00c3, 0x00c1, 0x1ea0, 0x1eb6, 0x1eac, 0x00c8,
53: 0x1eba, 0x1ebc, 0x00c9, 0x1eb8, 0x1ec6, 0x00cc, 0x1ec8, 0x0128,
54: /* 0x90 */
55: 0x00cd, 0x1eca, 0x00d2, 0x1ece, 0x00d5, 0x00d3, 0x1ecc, 0x1ed8,
56: 0x1edc, 0x1ede, 0x1ee0, 0x1eda, 0x1ee2, 0x00d9, 0x1ee6, 0x0168,
57: /* 0xa0 */
58: 0x00a0, 0x0102, 0x00c2, 0x00ca, 0x00d4, 0x01a0, 0x01af, 0x0110,
59: 0x0103, 0x00e2, 0x00ea, 0x00f4, 0x01a1, 0x01b0, 0x0111, 0x1eb0,
60: /* 0xb0 */
61: 0x0300, 0x0309, 0x0303, 0x0301, 0x0323, 0x00e0, 0x1ea3, 0x00e3,
62: 0x00e1, 0x1ea1, 0x1eb2, 0x1eb1, 0x1eb3, 0x1eb5, 0x1eaf, 0x1eb4,
63: /* 0xc0 */
64: 0x1eae, 0x1ea6, 0x1ea8, 0x1eaa, 0x1ea4, 0x1ec0, 0x1eb7, 0x1ea7,
65: 0x1ea9, 0x1eab, 0x1ea5, 0x1ead, 0x00e8, 0x1ec2, 0x1ebb, 0x1ebd,
66: /* 0xd0 */
67: 0x00e9, 0x1eb9, 0x1ec1, 0x1ec3, 0x1ec5, 0x1ebf, 0x1ec7, 0x00ec,
68: 0x1ec9, 0x1ec4, 0x1ebe, 0x1ed2, 0x0129, 0x00ed, 0x1ecb, 0x00f2,
69: /* 0xe0 */
70: 0x1ed4, 0x1ecf, 0x00f5, 0x00f3, 0x1ecd, 0x1ed3, 0x1ed5, 0x1ed7,
71: 0x1ed1, 0x1ed9, 0x1edd, 0x1edf, 0x1ee1, 0x1edb, 0x1ee3, 0x00f9,
72: /* 0xf0 */
73: 0x1ed6, 0x1ee7, 0x0169, 0x00fa, 0x1ee5, 0x1eeb, 0x1eed, 0x1eef,
74: 0x1ee9, 0x1ef1, 0x1ef3, 0x1ef7, 0x1ef9, 0x00fd, 0x1ef5, 0x1ed0,
75: };
76:
77: /* In the TCVN to Unicode direction, the state contains a buffered
78: character, or 0 if none. */
79:
80: static int
81: tcvn_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
82: {
83: unsigned char c = *s;
84: unsigned short wc;
85: unsigned short last_wc;
86: if (c < 0x18)
87: wc = tcvn_2uni_1[c];
88: else if (c < 0x80)
89: wc = c;
90: else
91: wc = tcvn_2uni_2[c-0x80];
92: last_wc = conv->istate;
93: if (last_wc) {
94: if (wc >= 0x0300 && wc < 0x0340) {
95: /* See whether last_wc and wc can be combined. */
96: unsigned int k;
97: unsigned int i1, i2;
98: switch (wc) {
99: case 0x0300: k = 0; break;
100: case 0x0301: k = 1; break;
101: case 0x0303: k = 2; break;
102: case 0x0309: k = 3; break;
103: case 0x0323: k = 4; break;
104: default: abort();
105: }
106: i1 = viet_comp_table[k].idx;
107: i2 = i1 + viet_comp_table[k].len-1;
108: if (last_wc >= viet_comp_table_data[i1].base
109: && last_wc <= viet_comp_table_data[i2].base) {
110: unsigned int i;
111: for (;;) {
112: i = (i1+i2)>>1;
113: if (last_wc == viet_comp_table_data[i].base)
114: break;
115: if (last_wc < viet_comp_table_data[i].base) {
116: if (i1 == i)
117: goto not_combining;
118: i2 = i;
119: } else {
120: if (i1 != i)
121: i1 = i;
122: else {
123: i = i2;
124: if (last_wc == viet_comp_table_data[i].base)
125: break;
126: goto not_combining;
127: }
128: }
129: }
130: last_wc = viet_comp_table_data[i].composed;
131: /* Output the combined character. */
132: conv->istate = 0;
133: *pwc = (ucs4_t) last_wc;
134: return 1;
135: }
136: }
137: not_combining:
138: /* Output the buffered character. */
139: conv->istate = 0;
140: *pwc = (ucs4_t) last_wc;
141: return 0; /* Don't advance the input pointer. */
142: }
143: if (wc >= 0x0041 && wc <= 0x01b0
144: && ((tcvn_comp_bases[(wc - 0x0040) >> 5] >> (wc & 0x1f)) & 1)) {
145: /* wc is a possible match in viet_comp_table_data. Buffer it. */
146: conv->istate = wc;
147: return RET_TOOFEW(1);
148: } else {
149: /* Output wc immediately. */
150: *pwc = (ucs4_t) wc;
151: return 1;
152: }
153: }
154:
155: #define tcvn_flushwc normal_flushwc
156:
157: static const unsigned char tcvn_page00[96+184] = {
158: 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
159: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
160: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
161: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
162: 0x80, 0x83, 0xa2, 0x82, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
163: 0x87, 0x8a, 0xa3, 0x00, 0x8d, 0x90, 0x00, 0x00, /* 0xc8-0xcf */
164: 0x00, 0x00, 0x92, 0x95, 0xa4, 0x94, 0x00, 0x00, /* 0xd0-0xd7 */
165: 0x00, 0x9d, 0x01, 0x00, 0x00, 0x16, 0x00, 0x00, /* 0xd8-0xdf */
166: 0xb5, 0xb8, 0xa9, 0xb7, 0x00, 0x00, 0x00, 0x00, /* 0xe0-0xe7 */
167: 0xcc, 0xd0, 0xaa, 0x00, 0xd7, 0xdd, 0x00, 0x00, /* 0xe8-0xef */
168: 0x00, 0x00, 0xdf, 0xe3, 0xab, 0xe2, 0x00, 0x00, /* 0xf0-0xf7 */
169: 0x00, 0xef, 0xf3, 0x00, 0x00, 0xfd, 0x00, 0x00, /* 0xf8-0xff */
170: /* 0x0100 */
171: 0x00, 0x00, 0xa1, 0xa8, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
172: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
173: 0xa7, 0xae, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
174: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
175: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
176: 0x8f, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
177: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
178: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
179: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
180: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
181: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
182: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
183: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
184: 0x9f, 0xf2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
185: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
186: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
187: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
188: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
189: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
190: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
191: 0xa5, 0xac, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
192: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa6, /* 0xa8-0xaf */
193: 0xad, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
194: };
195: static const unsigned char tcvn_page03[40] = {
196: 0xb0, 0xb3, 0x00, 0xb2, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
197: 0x00, 0xb1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
198: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
199: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
200: 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
201: };
202: static const unsigned char tcvn_page1e[96] = {
203: 0x84, 0xb9, 0x81, 0xb6, 0xc4, 0xca, 0xc1, 0xc7, /* 0xa0-0xa7 */
204: 0xc2, 0xc8, 0xc3, 0xc9, 0x86, 0xcb, 0xc0, 0xbe, /* 0xa8-0xaf */
205: 0xaf, 0xbb, 0xba, 0xbc, 0xbf, 0xbd, 0x85, 0xc6, /* 0xb0-0xb7 */
206: 0x8b, 0xd1, 0x88, 0xce, 0x89, 0xcf, 0xda, 0xd5, /* 0xb8-0xbf */
207: 0xc5, 0xd2, 0xcd, 0xd3, 0xd9, 0xd4, 0x8c, 0xd6, /* 0xc0-0xc7 */
208: 0x8e, 0xd8, 0x91, 0xde, 0x96, 0xe4, 0x93, 0xe1, /* 0xc8-0xcf */
209: 0xff, 0xe8, 0xdb, 0xe5, 0xe0, 0xe6, 0xf0, 0xe7, /* 0xd0-0xd7 */
210: 0x97, 0xe9, 0x9b, 0xed, 0x98, 0xea, 0x99, 0xeb, /* 0xd8-0xdf */
211: 0x9a, 0xec, 0x9c, 0xee, 0x02, 0xf4, 0x9e, 0xf1, /* 0xe0-0xe7 */
212: 0x11, 0xf8, 0x04, 0xf5, 0x05, 0xf6, 0x06, 0xf7, /* 0xe8-0xef */
213: 0x12, 0xf9, 0x13, 0xfa, 0x17, 0xfe, 0x14, 0xfb, /* 0xf0-0xf7 */
214: 0x15, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xf8-0xff */
215: };
216:
217: static int
218: tcvn_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
219: {
220: unsigned char c = 0;
221: if (wc < 0x0080 && (wc >= 0x0020 || (0x00fe0076 & (1 << wc)) == 0)) {
222: *r = wc;
223: return 1;
224: }
225: else if (wc >= 0x00a0 && wc < 0x01b8)
226: c = tcvn_page00[wc-0x00a0];
227: else if (wc >= 0x0300 && wc < 0x0328)
228: c = tcvn_page03[wc-0x0300];
229: else if (wc >= 0x0340 && wc < 0x0342) /* deprecated Vietnamese tone marks */
230: c = tcvn_page03[wc-0x0340];
231: else if (wc >= 0x1ea0 && wc < 0x1f00)
232: c = tcvn_page1e[wc-0x1ea0];
233: if (c != 0) {
234: *r = c;
235: return 1;
236: }
237: /* Try compatibility or canonical decomposition. */
238: {
239: /* Binary search through viet_decomp_table. */
240: unsigned int i1 = 0;
241: unsigned int i2 = sizeof(viet_decomp_table)/sizeof(viet_decomp_table[0])-1;
242: if (wc >= viet_decomp_table[i1].composed
243: && wc <= viet_decomp_table[i2].composed) {
244: unsigned int i;
245: for (;;) {
246: /* Here i2 - i1 > 0. */
247: i = (i1+i2)>>1;
248: if (wc == viet_decomp_table[i].composed)
249: break;
250: if (wc < viet_decomp_table[i].composed) {
251: if (i1 == i)
252: return RET_ILUNI;
253: /* Here i1 < i < i2. */
254: i2 = i;
255: } else {
256: /* Here i1 <= i < i2. */
257: if (i1 != i)
258: i1 = i;
259: else {
260: /* Here i2 - i1 = 1. */
261: i = i2;
262: if (wc == viet_decomp_table[i].composed)
263: break;
264: else
265: return RET_ILUNI;
266: }
267: }
268: }
269: /* Found a compatibility or canonical decomposition. */
270: wc = viet_decomp_table[i].base;
271: /* wc is one of 0x0020, 0x0041..0x005a, 0x0061..0x007a, 0x00a5, 0x00a8,
272: 0x00c2, 0x00c5..0x00c7, 0x00ca, 0x00cf, 0x00d3, 0x00d4, 0x00d6,
273: 0x00d8, 0x00da, 0x00dc, 0x00e2, 0x00e5..0x00e7, 0x00ea, 0x00ef,
274: 0x00f3, 0x00f4, 0x00f6, 0x00f8, 0x00fc, 0x0102, 0x0103, 0x01a0,
275: 0x01a1, 0x01af, 0x01b0. */
276: if (wc < 0x0080)
277: c = wc;
278: else {
279: c = tcvn_page00[wc-0x00a0];
280: if (c == 0)
281: return RET_ILUNI;
282: }
283: if (n < 2)
284: return RET_TOOSMALL;
285: r[0] = c;
286: r[1] = tcvn_comb_table[viet_decomp_table[i].comb1];
287: return 2;
288: }
289: }
290: return RET_ILUNI;
291: }
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