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1 office 1 /*
2 * Copyright (C) 1999-2001, 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 * CP1255
23 */
24  
25 #include "flushwc.h"
26  
27 /* Combining characters used in Hebrew encoding CP1255. */
28  
29 /* Relevant combining characters:
30 0x05b4, 0x05b7, 0x05b8, 0x05b9, 0x05bc, 0x05bf, 0x05c1, 0x05c2. */
31  
32 /* Composition tables for each of the relevant combining characters. */
33 static const struct { unsigned short base; unsigned short composed; } cp1255_comp_table_data[] = {
34 #define cp1255_comp_table05b4_idx 0
35 #define cp1255_comp_table05b4_len 1
36 { 0x05D9, 0xFB1D },
37 #define cp1255_comp_table05b7_idx (cp1255_comp_table05b4_idx+cp1255_comp_table05b4_len)
38 #define cp1255_comp_table05b7_len 2
39 { 0x05D0, 0xFB2E },
40 { 0x05F2, 0xFB1F },
41 #define cp1255_comp_table05b8_idx (cp1255_comp_table05b7_idx+cp1255_comp_table05b7_len)
42 #define cp1255_comp_table05b8_len 1
43 { 0x05D0, 0xFB2F },
44 #define cp1255_comp_table05b9_idx (cp1255_comp_table05b8_idx+cp1255_comp_table05b8_len)
45 #define cp1255_comp_table05b9_len 1
46 { 0x05D5, 0xFB4B },
47 #define cp1255_comp_table05bc_idx (cp1255_comp_table05b9_idx+cp1255_comp_table05b9_len)
48 #define cp1255_comp_table05bc_len 24
49 { 0x05D0, 0xFB30 },
50 { 0x05D1, 0xFB31 },
51 { 0x05D2, 0xFB32 },
52 { 0x05D3, 0xFB33 },
53 { 0x05D4, 0xFB34 },
54 { 0x05D5, 0xFB35 },
55 { 0x05D6, 0xFB36 },
56 { 0x05D8, 0xFB38 },
57 { 0x05D9, 0xFB39 },
58 { 0x05DA, 0xFB3A },
59 { 0x05DB, 0xFB3B },
60 { 0x05DC, 0xFB3C },
61 { 0x05DE, 0xFB3E },
62 { 0x05E0, 0xFB40 },
63 { 0x05E1, 0xFB41 },
64 { 0x05E3, 0xFB43 },
65 { 0x05E4, 0xFB44 },
66 { 0x05E6, 0xFB46 },
67 { 0x05E7, 0xFB47 },
68 { 0x05E8, 0xFB48 },
69 { 0x05E9, 0xFB49 },
70 { 0x05EA, 0xFB4A },
71 { 0xFB2A, 0xFB2C },
72 { 0xFB2B, 0xFB2D },
73 #define cp1255_comp_table05bf_idx (cp1255_comp_table05bc_idx+cp1255_comp_table05bc_len)
74 #define cp1255_comp_table05bf_len 3
75 { 0x05D1, 0xFB4C },
76 { 0x05DB, 0xFB4D },
77 { 0x05E4, 0xFB4E },
78 #define cp1255_comp_table05c1_idx (cp1255_comp_table05bf_idx+cp1255_comp_table05bf_len)
79 #define cp1255_comp_table05c1_len 2
80 { 0x05E9, 0xFB2A },
81 { 0xFB49, 0xFB2C },
82 #define cp1255_comp_table05c2_idx (cp1255_comp_table05c1_idx+cp1255_comp_table05c1_len)
83 #define cp1255_comp_table05c2_len 2
84 { 0x05E9, 0xFB2B },
85 { 0xFB49, 0xFB2D },
86 };
87 static const struct { unsigned int len; unsigned int idx; } cp1255_comp_table[] = {
88 { cp1255_comp_table05b4_len, cp1255_comp_table05b4_idx },
89 { cp1255_comp_table05b7_len, cp1255_comp_table05b7_idx },
90 { cp1255_comp_table05b8_len, cp1255_comp_table05b8_idx },
91 { cp1255_comp_table05b9_len, cp1255_comp_table05b9_idx },
92 { cp1255_comp_table05bc_len, cp1255_comp_table05bc_idx },
93 { cp1255_comp_table05bf_len, cp1255_comp_table05bf_idx },
94 { cp1255_comp_table05c1_len, cp1255_comp_table05c1_idx },
95 { cp1255_comp_table05c2_len, cp1255_comp_table05c2_idx },
96 };
97  
98 /* Decomposition table for the relevant Unicode characters. */
99 struct cp1255_decomp { unsigned short composed; unsigned short base; int comb1 : 8; signed int comb2 : 8; };
100 static const struct cp1255_decomp cp1255_decomp_table[] = {
101 { 0xFB1D, 0x05D9, 0, -1 },
102 { 0xFB1F, 0x05F2, 1, -1 },
103 { 0xFB2A, 0x05E9, 6, -1 },
104 { 0xFB2B, 0x05E9, 7, -1 },
105 { 0xFB2C, 0x05E9, 4, 6 },
106 { 0xFB2D, 0x05E9, 4, 7 },
107 { 0xFB2E, 0x05D0, 1, -1 },
108 { 0xFB2F, 0x05D0, 2, -1 },
109 { 0xFB30, 0x05D0, 4, -1 },
110 { 0xFB31, 0x05D1, 4, -1 },
111 { 0xFB32, 0x05D2, 4, -1 },
112 { 0xFB33, 0x05D3, 4, -1 },
113 { 0xFB34, 0x05D4, 4, -1 },
114 { 0xFB35, 0x05D5, 4, -1 },
115 { 0xFB36, 0x05D6, 4, -1 },
116 { 0xFB38, 0x05D8, 4, -1 },
117 { 0xFB39, 0x05D9, 4, -1 },
118 { 0xFB3A, 0x05DA, 4, -1 },
119 { 0xFB3B, 0x05DB, 4, -1 },
120 { 0xFB3C, 0x05DC, 4, -1 },
121 { 0xFB3E, 0x05DE, 4, -1 },
122 { 0xFB40, 0x05E0, 4, -1 },
123 { 0xFB41, 0x05E1, 4, -1 },
124 { 0xFB43, 0x05E3, 4, -1 },
125 { 0xFB44, 0x05E4, 4, -1 },
126 { 0xFB46, 0x05E6, 4, -1 },
127 { 0xFB47, 0x05E7, 4, -1 },
128 { 0xFB48, 0x05E8, 4, -1 },
129 { 0xFB49, 0x05E9, 4, -1 },
130 { 0xFB4A, 0x05EA, 4, -1 },
131 { 0xFB4B, 0x05D5, 3, -1 },
132 { 0xFB4C, 0x05D1, 5, -1 },
133 { 0xFB4D, 0x05DB, 5, -1 },
134 { 0xFB4E, 0x05E4, 5, -1 },
135 };
136  
137 static const unsigned char cp1255_comb_table[] = {
138 0xc4, 0xc7, 0xc8, 0xc9, 0xcc, 0xcf, 0xd1, 0xd2,
139 };
140  
141 static const unsigned short cp1255_2uni[128] = {
142 /* 0x80 */
143 0x20ac, 0xfffd, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021,
144 0x02c6, 0x2030, 0xfffd, 0x2039, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
145 /* 0x90 */
146 0xfffd, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
147 0x02dc, 0x2122, 0xfffd, 0x203a, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
148 /* 0xa0 */
149 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x20aa, 0x00a5, 0x00a6, 0x00a7,
150 0x00a8, 0x00a9, 0x00d7, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
151 /* 0xb0 */
152 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
153 0x00b8, 0x00b9, 0x00f7, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
154 /* 0xc0 */
155 0x05b0, 0x05b1, 0x05b2, 0x05b3, 0x05b4, 0x05b5, 0x05b6, 0x05b7,
156 0x05b8, 0x05b9, 0xfffd, 0x05bb, 0x05bc, 0x05bd, 0x05be, 0x05bf,
157 /* 0xd0 */
158 0x05c0, 0x05c1, 0x05c2, 0x05c3, 0x05f0, 0x05f1, 0x05f2, 0x05f3,
159 0x05f4, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
160 /* 0xe0 */
161 0x05d0, 0x05d1, 0x05d2, 0x05d3, 0x05d4, 0x05d5, 0x05d6, 0x05d7,
162 0x05d8, 0x05d9, 0x05da, 0x05db, 0x05dc, 0x05dd, 0x05de, 0x05df,
163 /* 0xf0 */
164 0x05e0, 0x05e1, 0x05e2, 0x05e3, 0x05e4, 0x05e5, 0x05e6, 0x05e7,
165 0x05e8, 0x05e9, 0x05ea, 0xfffd, 0xfffd, 0x200e, 0x200f, 0xfffd,
166 };
167  
168 /* In the CP1255 to Unicode direction, the state contains a buffered
169 character, or 0 if none. */
170  
171 static int
172 cp1255_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
173 {
174 unsigned char c = *s;
175 unsigned short wc;
176 unsigned short last_wc;
177 if (c < 0x80) {
178 wc = c;
179 } else {
180 wc = cp1255_2uni[c-0x80];
181 if (wc == 0xfffd)
182 return RET_ILSEQ;
183 }
184 last_wc = conv->istate;
185 if (last_wc) {
186 if (wc >= 0x05b0 && wc < 0x05c5) {
187 /* See whether last_wc and wc can be combined. */
188 unsigned int k;
189 unsigned int i1, i2;
190 switch (wc) {
191 case 0x05b4: k = 0; break;
192 case 0x05b7: k = 1; break;
193 case 0x05b8: k = 2; break;
194 case 0x05b9: k = 3; break;
195 case 0x05bc: k = 4; break;
196 case 0x05bf: k = 5; break;
197 case 0x05c1: k = 6; break;
198 case 0x05c2: k = 7; break;
199 default: goto not_combining;
200 }
201 i1 = cp1255_comp_table[k].idx;
202 i2 = i1 + cp1255_comp_table[k].len-1;
203 if (last_wc >= cp1255_comp_table_data[i1].base
204 && last_wc <= cp1255_comp_table_data[i2].base) {
205 unsigned int i;
206 for (;;) {
207 i = (i1+i2)>>1;
208 if (last_wc == cp1255_comp_table_data[i].base)
209 break;
210 if (last_wc < cp1255_comp_table_data[i].base) {
211 if (i1 == i)
212 goto not_combining;
213 i2 = i;
214 } else {
215 if (i1 != i)
216 i1 = i;
217 else {
218 i = i2;
219 if (last_wc == cp1255_comp_table_data[i].base)
220 break;
221 goto not_combining;
222 }
223 }
224 }
225 last_wc = cp1255_comp_table_data[i].composed;
226 if (last_wc == 0xfb2a || last_wc == 0xfb2b || last_wc == 0xfb49) {
227 /* Buffer the combined character. */
228 conv->istate = last_wc;
229 return RET_TOOFEW(1);
230 } else {
231 /* Output the combined character. */
232 conv->istate = 0;
233 *pwc = (ucs4_t) last_wc;
234 return 1;
235 }
236 }
237 }
238 not_combining:
239 /* Output the buffered character. */
240 conv->istate = 0;
241 *pwc = (ucs4_t) last_wc;
242 return 0; /* Don't advance the input pointer. */
243 }
244 if ((wc >= 0x05d0 && wc <= 0x05ea && ((0x07db5f7f >> (wc - 0x05d0)) & 1))
245 || wc == 0x05f2) {
246 /* wc is a possible match in cp1255_comp_table_data. Buffer it. */
247 conv->istate = wc;
248 return RET_TOOFEW(1);
249 } else {
250 /* Output wc immediately. */
251 *pwc = (ucs4_t) wc;
252 return 1;
253 }
254 }
255  
256 #define cp1255_flushwc normal_flushwc
257  
258 static const unsigned char cp1255_page00[88] = {
259 0xa0, 0xa1, 0xa2, 0xa3, 0x00, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
260 0xa8, 0xa9, 0x00, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
261 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
262 0xb8, 0xb9, 0x00, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
263 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
264 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
265 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xaa, /* 0xd0-0xd7 */
266 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
267 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xe0-0xe7 */
268 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xe8-0xef */
269 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba, /* 0xf0-0xf7 */
270 };
271 static const unsigned char cp1255_page02[32] = {
272 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, /* 0xc0-0xc7 */
273 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
274 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
275 0x00, 0x00, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
276 };
277 static const unsigned char cp1255_page05[72] = {
278 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xb0-0xb7 */
279 0xc8, 0xc9, 0x00, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xb8-0xbf */
280 0xd0, 0xd1, 0xd2, 0xd3, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
281 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
282 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xd0-0xd7 */
283 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xd8-0xdf */
284 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xe0-0xe7 */
285 0xf8, 0xf9, 0xfa, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xe8-0xef */
286 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0x00, 0x00, 0x00, /* 0xf0-0xf7 */
287 };
288 static const unsigned char cp1255_page20[56] = {
289 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfd, 0xfe, /* 0x08-0x0f */
290 0x00, 0x00, 0x00, 0x96, 0x97, 0x00, 0x00, 0x00, /* 0x10-0x17 */
291 0x91, 0x92, 0x82, 0x00, 0x93, 0x94, 0x84, 0x00, /* 0x18-0x1f */
292 0x86, 0x87, 0x95, 0x00, 0x00, 0x00, 0x85, 0x00, /* 0x20-0x27 */
293 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
294 0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
295 0x00, 0x8b, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
296 };
297  
298 static int
299 cp1255_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
300 {
301 unsigned char c = 0;
302 if (wc < 0x0080) {
303 *r = wc;
304 return 1;
305 }
306 else if (wc >= 0x00a0 && wc < 0x00f8)
307 c = cp1255_page00[wc-0x00a0];
308 else if (wc == 0x0192)
309 c = 0x83;
310 else if (wc >= 0x02c0 && wc < 0x02e0)
311 c = cp1255_page02[wc-0x02c0];
312 else if (wc >= 0x05b0 && wc < 0x05f8)
313 c = cp1255_page05[wc-0x05b0];
314 else if (wc >= 0x2008 && wc < 0x2040)
315 c = cp1255_page20[wc-0x2008];
316 else if (wc == 0x20aa)
317 c = 0xa4;
318 else if (wc == 0x20ac)
319 c = 0x80;
320 else if (wc == 0x2122)
321 c = 0x99;
322 if (c != 0) {
323 *r = c;
324 return 1;
325 }
326 /* Try canonical decomposition. */
327 {
328 /* Binary search through cp1255_decomp_table. */
329 unsigned int i1 = 0;
330 unsigned int i2 = sizeof(cp1255_decomp_table)/sizeof(cp1255_decomp_table[0])-1;
331 if (wc >= cp1255_decomp_table[i1].composed
332 && wc <= cp1255_decomp_table[i2].composed) {
333 unsigned int i;
334 for (;;) {
335 /* Here i2 - i1 > 0. */
336 i = (i1+i2)>>1;
337 if (wc == cp1255_decomp_table[i].composed)
338 break;
339 if (wc < cp1255_decomp_table[i].composed) {
340 if (i1 == i)
341 return RET_ILUNI;
342 /* Here i1 < i < i2. */
343 i2 = i;
344 } else {
345 /* Here i1 <= i < i2. */
346 if (i1 != i)
347 i1 = i;
348 else {
349 /* Here i2 - i1 = 1. */
350 i = i2;
351 if (wc == cp1255_decomp_table[i].composed)
352 break;
353 else
354 return RET_ILUNI;
355 }
356 }
357 }
358 /* Found a canonical decomposition. */
359 wc = cp1255_decomp_table[i].base;
360 /* wc is one of 0x05d0..0x05d6, 0x05d8..0x05dc, 0x05de, 0x05e0..0x05e1,
361 0x05e3..0x05e4, 0x05e6..0x05ea, 0x05f2. */
362 c = cp1255_page05[wc-0x05b0];
363 if (cp1255_decomp_table[i].comb2 < 0) {
364 if (n < 2)
365 return RET_TOOSMALL;
366 r[0] = c;
367 r[1] = cp1255_comb_table[cp1255_decomp_table[i].comb1];
368 return 2;
369 } else {
370 if (n < 3)
371 return RET_TOOSMALL;
372 r[0] = c;
373 r[1] = cp1255_comb_table[cp1255_decomp_table[i].comb1];
374 r[2] = cp1255_comb_table[cp1255_decomp_table[i].comb2];
375 return 3;
376 }
377 }
378 }
379 return RET_ILUNI;
380 }