1: /*
2: * Copyright (C) 1999-2001, 2004, 2016 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: * CP1258
22: */
23:
24: #include "flushwc.h"
25: #include "vietcomb.h"
26:
27: static const unsigned char cp1258_comb_table[] = {
28: 0xcc, 0xec, 0xde, 0xd2, 0xf2,
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, 0x00A8, 0x00C2, 0x00C5..0x00C7,
35: 0x00CA, 0x00CF, 0x00D3..0x00D4, 0x00D6, 0x00D8, 0x00DA, 0x00DC, 0x00E2,
36: 0x00E5..0x00E7, 0x00EA, 0x00EF, 0x00F3..0x00F4, 0x00F6, 0x00F8, 0x00FA,
37: 0x00FC, 0x0102..0x0103, 0x01A0..0x01A1, 0x01AF..0x01B0. */
38: static const unsigned int cp1258_comp_bases[] = {
39: 0x06fdfbbe, 0x06fdfbbe, 0x00000000, 0x00000120, 0x155884e4, 0x155884e4,
40: 0x0000000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00018003
41: };
42:
43: static const unsigned short cp1258_2uni[128] = {
44: /* 0x80 */
45: 0x20ac, 0xfffd, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021,
46: 0x02c6, 0x2030, 0xfffd, 0x2039, 0x0152, 0xfffd, 0xfffd, 0xfffd,
47: /* 0x90 */
48: 0xfffd, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
49: 0x02dc, 0x2122, 0xfffd, 0x203a, 0x0153, 0xfffd, 0xfffd, 0x0178,
50: /* 0xa0 */
51: 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
52: 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
53: /* 0xb0 */
54: 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
55: 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
56: /* 0xc0 */
57: 0x00c0, 0x00c1, 0x00c2, 0x0102, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
58: 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x0300, 0x00cd, 0x00ce, 0x00cf,
59: /* 0xd0 */
60: 0x0110, 0x00d1, 0x0309, 0x00d3, 0x00d4, 0x01a0, 0x00d6, 0x00d7,
61: 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x01af, 0x0303, 0x00df,
62: /* 0xe0 */
63: 0x00e0, 0x00e1, 0x00e2, 0x0103, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
64: 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x0301, 0x00ed, 0x00ee, 0x00ef,
65: /* 0xf0 */
66: 0x0111, 0x00f1, 0x0323, 0x00f3, 0x00f4, 0x01a1, 0x00f6, 0x00f7,
67: 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x01b0, 0x20ab, 0x00ff,
68: };
69:
70: /* In the CP1258 to Unicode direction, the state contains a buffered
71: character, or 0 if none. */
72:
73: static int
74: cp1258_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
75: {
76: unsigned char c = *s;
77: unsigned short wc;
78: unsigned short last_wc;
79: if (c < 0x80) {
80: wc = c;
81: } else {
82: wc = cp1258_2uni[c-0x80];
83: if (wc == 0xfffd)
84: return RET_ILSEQ;
85: }
86: last_wc = conv->istate;
87: if (last_wc) {
88: if (wc >= 0x0300 && wc < 0x0340) {
89: /* See whether last_wc and wc can be combined. */
90: unsigned int k;
91: unsigned int i1, i2;
92: switch (wc) {
93: case 0x0300: k = 0; break;
94: case 0x0301: k = 1; break;
95: case 0x0303: k = 2; break;
96: case 0x0309: k = 3; break;
97: case 0x0323: k = 4; break;
98: default: abort();
99: }
100: i1 = viet_comp_table[k].idx;
101: i2 = i1 + viet_comp_table[k].len-1;
102: if (last_wc >= viet_comp_table_data[i1].base
103: && last_wc <= viet_comp_table_data[i2].base) {
104: unsigned int i;
105: for (;;) {
106: i = (i1+i2)>>1;
107: if (last_wc == viet_comp_table_data[i].base)
108: break;
109: if (last_wc < viet_comp_table_data[i].base) {
110: if (i1 == i)
111: goto not_combining;
112: i2 = i;
113: } else {
114: if (i1 != i)
115: i1 = i;
116: else {
117: i = i2;
118: if (last_wc == viet_comp_table_data[i].base)
119: break;
120: goto not_combining;
121: }
122: }
123: }
124: last_wc = viet_comp_table_data[i].composed;
125: /* Output the combined character. */
126: conv->istate = 0;
127: *pwc = (ucs4_t) last_wc;
128: return 1;
129: }
130: }
131: not_combining:
132: /* Output the buffered character. */
133: conv->istate = 0;
134: *pwc = (ucs4_t) last_wc;
135: return 0; /* Don't advance the input pointer. */
136: }
137: if (wc >= 0x0041 && wc <= 0x01b0
138: && ((cp1258_comp_bases[(wc - 0x0040) >> 5] >> (wc & 0x1f)) & 1)) {
139: /* wc is a possible match in viet_comp_table_data. Buffer it. */
140: conv->istate = wc;
141: return RET_TOOFEW(1);
142: } else {
143: /* Output wc immediately. */
144: *pwc = (ucs4_t) wc;
145: return 1;
146: }
147: }
148:
149: #define cp1258_flushwc normal_flushwc
150:
151: static const unsigned char cp1258_page00[88] = {
152: 0xc0, 0xc1, 0xc2, 0x00, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
153: 0xc8, 0xc9, 0xca, 0xcb, 0x00, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
154: 0x00, 0xd1, 0x00, 0xd3, 0xd4, 0x00, 0xd6, 0xd7, /* 0xd0-0xd7 */
155: 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0x00, 0x00, 0xdf, /* 0xd8-0xdf */
156: 0xe0, 0xe1, 0xe2, 0x00, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
157: 0xe8, 0xe9, 0xea, 0xeb, 0x00, 0xed, 0xee, 0xef, /* 0xe8-0xef */
158: 0x00, 0xf1, 0x00, 0xf3, 0xf4, 0x00, 0xf6, 0xf7, /* 0xf0-0xf7 */
159: 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0x00, 0x00, 0xff, /* 0xf8-0xff */
160: /* 0x0100 */
161: 0x00, 0x00, 0xc3, 0xe3, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
162: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
163: 0xd0, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
164: };
165: static const unsigned char cp1258_page01[104] = {
166: 0x00, 0x00, 0x8c, 0x9c, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
167: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
168: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
169: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
170: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
171: 0x9f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
172: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
173: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
174: 0x00, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
175: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
176: 0xd5, 0xf5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
177: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdd, /* 0xa8-0xaf */
178: 0xfd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
179: };
180: static const unsigned char cp1258_page02[32] = {
181: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, /* 0xc0-0xc7 */
182: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
183: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
184: 0x00, 0x00, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
185: };
186: static const unsigned char cp1258_page03[40] = {
187: 0xcc, 0xec, 0x00, 0xde, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
188: 0x00, 0xd2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
189: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
190: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
191: 0x00, 0x00, 0x00, 0xf2, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
192: };
193: static const unsigned char cp1258_page20[48] = {
194: 0x00, 0x00, 0x00, 0x96, 0x97, 0x00, 0x00, 0x00, /* 0x10-0x17 */
195: 0x91, 0x92, 0x82, 0x00, 0x93, 0x94, 0x84, 0x00, /* 0x18-0x1f */
196: 0x86, 0x87, 0x95, 0x00, 0x00, 0x00, 0x85, 0x00, /* 0x20-0x27 */
197: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
198: 0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
199: 0x00, 0x8b, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
200: };
201:
202: static int
203: cp1258_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
204: {
205: unsigned char c = 0;
206: if (wc < 0x0080) {
207: *r = wc;
208: return 1;
209: }
210: else if (wc >= 0x00a0 && wc < 0x00c0)
211: c = wc;
212: else if (wc >= 0x00c0 && wc < 0x0118)
213: c = cp1258_page00[wc-0x00c0];
214: else if (wc >= 0x0150 && wc < 0x01b8)
215: c = cp1258_page01[wc-0x0150];
216: else if (wc >= 0x02c0 && wc < 0x02e0)
217: c = cp1258_page02[wc-0x02c0];
218: else if (wc >= 0x0300 && wc < 0x0328)
219: c = cp1258_page03[wc-0x0300];
220: else if (wc >= 0x0340 && wc < 0x0342) /* deprecated Vietnamese tone marks */
221: c = cp1258_page03[wc-0x0340];
222: else if (wc >= 0x2010 && wc < 0x2040)
223: c = cp1258_page20[wc-0x2010];
224: else if (wc == 0x20ab)
225: c = 0xfe;
226: else if (wc == 0x20ac)
227: c = 0x80;
228: else if (wc == 0x2122)
229: c = 0x99;
230: if (c != 0) {
231: *r = c;
232: return 1;
233: }
234: /* Try canonical decomposition. */
235: {
236: /* Binary search through viet_decomp_table. */
237: unsigned int i1 = 0;
238: unsigned int i2 = sizeof(viet_decomp_table)/sizeof(viet_decomp_table[0])-1;
239: if (wc >= viet_decomp_table[i1].composed
240: && wc <= viet_decomp_table[i2].composed) {
241: unsigned int i;
242: for (;;) {
243: /* Here i2 - i1 > 0. */
244: i = (i1+i2)>>1;
245: if (wc == viet_decomp_table[i].composed)
246: break;
247: if (wc < viet_decomp_table[i].composed) {
248: if (i1 == i)
249: return RET_ILUNI;
250: /* Here i1 < i < i2. */
251: i2 = i;
252: } else {
253: /* Here i1 <= i < i2. */
254: if (i1 != i)
255: i1 = i;
256: else {
257: /* Here i2 - i1 = 1. */
258: i = i2;
259: if (wc == viet_decomp_table[i].composed)
260: break;
261: else
262: return RET_ILUNI;
263: }
264: }
265: }
266: /* Found a canonical decomposition. */
267: wc = viet_decomp_table[i].base;
268: /* wc is one of 0x0020, 0x0041..0x005a, 0x0061..0x007a, 0x00a5, 0x00a8,
269: 0x00c2, 0x00c5..0x00c7, 0x00ca, 0x00cf, 0x00d3, 0x00d4, 0x00d6,
270: 0x00d8, 0x00da, 0x00dc, 0x00e2, 0x00e5..0x00e7, 0x00ea, 0x00ef,
271: 0x00f3, 0x00f4, 0x00f6, 0x00f8, 0x00fc, 0x0102, 0x0103, 0x01a0,
272: 0x01a1, 0x01af, 0x01b0. */
273: if (wc < 0x0100)
274: c = wc;
275: else if (wc < 0x0118)
276: c = cp1258_page00[wc-0x00c0];
277: else
278: c = cp1258_page01[wc-0x0150];
279: if (n < 2)
280: return RET_TOOSMALL;
281: r[0] = c;
282: r[1] = cp1258_comb_table[viet_decomp_table[i].comb1];
283: return 2;
284: }
285: }
286: return RET_ILUNI;
287: }
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