1: /*
2: * Copyright (C) 1999-2001, 2005 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: * GB18030
23: */
24:
25: /*
26: * GB18030, as specified in the GB18030 standard, is an extension of GBK.
27: *
28: * In what follows, page numbers refer to the GB18030 standard (second
29: * printing).
30: *
31: *
32: * It consists of the following parts:
33: *
34: * One-byte range:
35: * ASCII p. 2 0x{00..7F}
36: *
37: * Two-byte range:
38: * GBK part 1 p. 10..12 0x{A1..A9}{A1..FE}
39: * GBK part 2 p. 13..36 0x{B0..F7}{A1..FE}
40: * GBK part 3 p. 37..52 0x{81..A0}{40..7E,80..FE}
41: * GBK part 4 p. 53..81 0x{AA..FE}{40..7E,80..A0}
42: * GBK part 5 p. 82 0x{A8..A9}{40..7E,80..A0}
43: * UDA part 1 p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
44: * UDA part 2 p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
45: * UDA part 3 p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
46: *
47: * Four-byte range:
48: * BMP rest p. 94..283 0x{81..84}{30..39}{81..FE}{30..39}
49: * rest of U+0080..U+FFFF
50: * Planes 1-16 p. 5 0x{90..FE}{30..39}{81..FE}{30..39}
51: * U+10000..U+10FFFF
52: *
53: * To GBK part 1 were added:
54: * 1. 0xA2E3, 0xA8BF.
55: * 2. Characters mapped to the Unicode PUA
56: * 0xA2AB..0xA2B0 U+E766..U+E76B
57: * 0xA2E4 U+E76D
58: * 0xA2EF..0xA2F0 U+E76E..U+E76F
59: * 0xA2FD..0xA2FE U+E770..U+E771
60: * 0xA4F4..0xA4FE U+E772..U+E77C
61: * 0xA5F7..0xA5FE U+E77D..U+E784
62: * 0xA6B9..0xA6C0 U+E785..U+E78C
63: * 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
64: * 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
65: * 0xA6F3 [glyphs here!!] U+E796
66: * 0xA6F6..0xA6FE U+E797..U+E79F
67: * 0xA7C2..0xA7D0 U+E7A0..U+E7AE
68: * 0xA7F2..0xA7FE U+E7AF..U+E7BB
69: * 0xA8BC [glyphs here!!] U+E7C7
70: * 0xA8C1..0xA8C4 U+E7C9..U+E7CC
71: * 0xA8EA..0xA8FE U+E7CD..U+E7E1
72: * 0xA9A1..0xA9A3 U+E7FE..U+E800
73: * 0xA9F0..0xA9FE U+E801..U+E80F
74: *
75: * To GBK part 2 were added:
76: * 3. Characters mapped to the Unicode PUA
77: * 0xD7FA..0xD7FE U+E810..0xE814
78: *
79: * To GBK part 3 nothing was added.
80: *
81: * To GBK part 4 were added:
82: * 4. 0xFE{50,54..58,5A..60,62..65,68..6B,6E..75,77..7D,80..8F,92..9F}.
83: * 5. Characters mapped to the Unicode PUA
84: * 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
85: * 0xFE59 [glyphs here!!] U+E81E
86: * 0xFE61 [glyphs here!!] U+E826
87: * 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
88: * 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
89: * 0xFE76 [glyphs here!!] U+E83B
90: * 0xFE7E [glyphs here!!] U+E843
91: * 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
92: * 0xFEA0 [glyphs here!!] U+E864
93: *
94: * To GBK part 5 were added:
95: * 6. 0xA98A..0xA995.
96: * 7. Characters mapped to the Unicode PUA
97: * 0xA896..0xA8A0 U+E7BC..U+E7C6
98: * 0xA958 U+E7E2
99: * 0xA95B U+E7E3
100: * 0xA95D..0xA95F U+E7E4..U+E7E6
101: * 0xA997..0xA9A0 U+E7F4..U+E7FD
102: *
103: * UDA part 1 contains the user-defined characters, mapped to the Unicode PUA
104: * U+E000..U+E233 in ascending order.
105: *
106: * UDA part 2 contains the user-defined characters, mapped to the Unicode PUA
107: * U+E234..U+E4C5 in ascending order.
108: *
109: * UDA part 3 contains the user-defined characters, mapped to the Unicode PUA
110: * U+E4C6..U+E765 in ascending order.
111: *
112: * The four-byte range 0x{81..84}{30..39}{81..FE}{30..39}
113: * contains the rest of the Unicode BMP in ascending order.
114: * Start: 0x81308130 = 0x0080
115: * End: 0x8431A439 = 0xFFFF
116: *
117: * The four-byte range 0x{90..E3}{30..39}{81..FE}{30..39}
118: * contains the remaining 16 Unicode planes in Unicode order.
119: * Start: 0x90308130 = 0x010000
120: * End: 0xE3329A35 = 0x10FFFF
121: *
122: *
123: * Unassigned Unicode characters are mapped. For example,
124: * U+173F = 0x8134BF35 (p. 120)
125: * U+2EFF = 0x81398B31 (p. 148)
126: * U+FFFE = 0x8431A438 (p. 283)
127: *
128: *
129: * The Unicode PUA (U+E000..U+F8FF) is mapped as follows:
130: * p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
131: * p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
132: * p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
133: * p. 10 0xA2AB..0xA2B0 U+E766..U+E76B
134: * p. 255 0x8336C739 U+E76C
135: * p. 10 0xA2E4 U+E76D
136: * p. 10 0xA2EF..0xA2F0 U+E76E..U+E76F
137: * p. 10 0xA2FD..0xA2FE U+E770..U+E771
138: * p. 11 0xA4F4..0xA4FE U+E772..U+E77C
139: * p. 11 0xA5F7..0xA5FE U+E77D..U+E784
140: * p. 11 0xA6B9..0xA6C0 U+E785..U+E78C
141: * p. 11 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
142: * p. 11 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
143: * p. 11 0xA6F3 [glyphs here!!] U+E796
144: * p. 11 0xA6F6..0xA6FE U+E797..U+E79F
145: * p. 12 0xA7C2..0xA7D0 U+E7A0..U+E7AE
146: * p. 12 0xA7F2..0xA7FE U+E7AF..U+E7BB
147: * p. 82 0xA896..0xA8A0 U+E7BC..U+E7C6
148: * p. 12 0xA8BC [glyphs here!!] U+E7C7
149: * p. 255 0x8336C830 U+E7C8
150: * p. 12 0xA8C1..0xA8C4 U+E7C9..U+E7CC
151: * p. 12 0xA8EA..0xA8FE U+E7CD..U+E7E1
152: * p. 82 0xA958 U+E7E2
153: * p. 82 0xA95B U+E7E3
154: * p. 82 0xA95D..0xA95F U+E7E4..U+E7E6
155: * p. 255 0x8336C831..0x8336C933 U+E7E7..U+E7F3
156: * p. 82 0xA997..0xA9A0 U+E7F4..U+E7FD
157: * p. 12 0xA9A1..0xA9A3 U+E7FE..U+E800
158: * p. 12 0xA9F0..0xA9FE U+E801..U+E80F
159: * p. 26 0xD7FA..0xD7FE U+E810..0xE814
160: * p. 255 0x8336C934 U+E815
161: * p. 81 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
162: * p. 255 0x8336C935..0x8336C939 U+E819..U+E81D
163: * p. 81 0xFE59 [glyphs here!!] U+E81E
164: * p. 255 0x8336CA30..0x8336CA36 U+E81F..U+E825
165: * p. 81 0xFE61 [glyphs here!!] U+E826
166: * p. 255 0x8336CA37..0x8336CB30 U+E827..U+E82A
167: * p. 81 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
168: * p. 255 0x8336CB31..0x8336CB34 U+E82D..U+E830
169: * p. 81 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
170: * p. 255 0x8336CB35..0x8336CC32 U+E833..U+E83A
171: * p. 81 0xFE76 [glyphs here!!] U+E83B
172: * p. 255 0x8336CC33..0x8336CC39 U+E83C..U+E842
173: * p. 81 0xFE7E [glyphs here!!] U+E843
174: * p. 255 0x8336CD30..0x8336CE35 U+E844..U+E853
175: * p. 81 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
176: * p. 255 0x8336CE36..0x8336CF39 U+E856..U+E863
177: * p. 81 0xFEA0 [glyphs here!!] U+E864
178: * p. 255..276 0x8336D030..0x84308130 U+E865..U+F8FF
179: *
180: *
181: * The Unicode surrogate area (U+D800..U+DFFF) is not mapped. (p. 255)
182: *
183: */
184:
185: #include "gb18030ext.h"
186: #include "gb18030uni.h"
187:
188: static int
189: gb18030_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
190: {
191: int ret;
192:
193: /* Code set 0 (ASCII) */
194: if (*s < 0x80)
195: return ascii_mbtowc(conv,pwc,s,n);
196:
197: /* Code set 1 (GBK extended) */
198: ret = gbk_mbtowc(conv,pwc,s,n);
199: if (ret != RET_ILSEQ)
200: return ret;
201:
202: ret = gb18030ext_mbtowc(conv,pwc,s,n);
203: if (ret != RET_ILSEQ)
204: return ret;
205:
206: /* Code set 2 (remainder of Unicode U+0000..U+FFFF), including
207: User-defined characters, two-byte part of range U+E766..U+E864 */
208: ret = gb18030uni_mbtowc(conv,pwc,s,n);
209: if (ret != RET_ILSEQ)
210: return ret;
211: /* User-defined characters range U+E000..U+E765 */
212: {
213: unsigned char c1 = s[0];
214: if ((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) {
215: if (n >= 2) {
216: unsigned char c2 = s[1];
217: if (c2 >= 0xa1 && c2 <= 0xfe) {
218: *pwc = 0xe000 + 94 * (c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c2 - 0xa1);
219: return 2;
220: }
221: } else
222: return RET_TOOFEW(0);
223: } else if (c1 >= 0xa1 && c1 <= 0xa7) {
224: if (n >= 2) {
225: unsigned char c2 = s[1];
226: if (c2 >= 0x40 && c2 <= 0xa1 && c2 != 0x7f) {
227: *pwc = 0xe4c6 + 96 * (c1 - 0xa1) + c2 - (c2 >= 0x80 ? 0x41 : 0x40);
228: return 2;
229: }
230: } else
231: return RET_TOOFEW(0);
232: }
233: }
234:
235: /* Code set 3 (Unicode U+10000..U+10FFFF) */
236: {
237: unsigned char c1 = s[0];
238: if (c1 >= 0x90 && c1 <= 0xe3) {
239: if (n >= 2) {
240: unsigned char c2 = s[1];
241: if (c2 >= 0x30 && c2 <= 0x39) {
242: if (n >= 3) {
243: unsigned char c3 = s[2];
244: if (c3 >= 0x81 && c3 <= 0xfe) {
245: if (n >= 4) {
246: unsigned char c4 = s[3];
247: if (c4 >= 0x30 && c4 <= 0x39) {
248: unsigned int i = (((c1 - 0x90) * 10 + (c2 - 0x30)) * 126 + (c3 - 0x81)) * 10 + (c4 - 0x30);
249: if (i >= 0 && i < 0x100000) {
250: *pwc = (ucs4_t) (0x10000 + i);
251: return 4;
252: }
253: }
254: return RET_ILSEQ;
255: }
256: return RET_TOOFEW(0);
257: }
258: return RET_ILSEQ;
259: }
260: return RET_TOOFEW(0);
261: }
262: return RET_ILSEQ;
263: }
264: return RET_TOOFEW(0);
265: }
266: return RET_ILSEQ;
267: }
268: }
269:
270: static const unsigned short gb18030_pua2charset[32*3] = {
271: /* Unicode range GB18030 range */
272: 0xe766, 0xe76b, 0xa2ab, /*.. 0xa2b0, */
273: 0xe76d, 0xe76d, 0xa2e4,
274: 0xe76e, 0xe76f, 0xa2ef, /*.. 0xa2f0, */
275: 0xe770, 0xe771, 0xa2fd, /*.. 0xa2fe, */
276: 0xe772, 0xe77c, 0xa4f4, /*.. 0xa4fe, */
277: 0xe77d, 0xe784, 0xa5f7, /*.. 0xa5fe, */
278: 0xe785, 0xe78c, 0xa6b9, /*.. 0xa6c0, */
279: 0xe78d, 0xe793, 0xa6d9, /*.. 0xa6df, */
280: 0xe794, 0xe795, 0xa6ec, /*.. 0xa6ed, */
281: 0xe796, 0xe796, 0xa6f3,
282: 0xe797, 0xe79f, 0xa6f6, /*.. 0xa6fe, */
283: 0xe7a0, 0xe7ae, 0xa7c2, /*.. 0xa7d0, */
284: 0xe7af, 0xe7bb, 0xa7f2, /*.. 0xa7fe, */
285: 0xe7bc, 0xe7c6, 0xa896, /*.. 0xa8a0, */
286: 0xe7c7, 0xe7c7, 0xa8bc,
287: 0xe7c9, 0xe7cc, 0xa8c1, /*.. 0xa8c4, */
288: 0xe7cd, 0xe7e1, 0xa8ea, /*.. 0xa8fe, */
289: 0xe7e2, 0xe7e2, 0xa958,
290: 0xe7e3, 0xe7e3, 0xa95b,
291: 0xe7e4, 0xe7e6, 0xa95d, /*.. 0xa95f, */
292: 0xe7f4, 0xe800, 0xa997, /*.. 0xa9a3, */
293: 0xe801, 0xe80f, 0xa9f0, /*.. 0xa9fe, */
294: 0xe810, 0xe814, 0xd7fa, /*.. 0xd7fe, */
295: 0xe816, 0xe818, 0xfe51, /*.. 0xfe53, */
296: 0xe81e, 0xe81e, 0xfe59,
297: 0xe826, 0xe826, 0xfe61,
298: 0xe82b, 0xe82c, 0xfe66, /*.. 0xfe67, */
299: 0xe831, 0xe832, 0xfe6c, /*.. 0xfe6d, */
300: 0xe83b, 0xe83b, 0xfe76,
301: 0xe843, 0xe843, 0xfe7e,
302: 0xe854, 0xe855, 0xfe90, /*.. 0xfe91, */
303: 0xe864, 0xe864, 0xfea0,
304: };
305:
306: static int
307: gb18030_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
308: {
309: int ret;
310:
311: /* Code set 0 (ASCII) */
312: ret = ascii_wctomb(conv,r,wc,n);
313: if (ret != RET_ILUNI)
314: return ret;
315:
316: /* Code set 1 (GBK extended) */
317: ret = gbk_wctomb(conv,r,wc,n);
318: if (ret != RET_ILUNI)
319: return ret;
320:
321: ret = gb18030ext_wctomb(conv,r,wc,n);
322: if (ret != RET_ILUNI)
323: return ret;
324:
325: /* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
326: if (wc >= 0xe000 && wc <= 0xe864) {
327: if (n >= 2) {
328: if (wc < 0xe766) {
329: /* User-defined characters range U+E000..U+E765 */
330: if (wc < 0xe4c6) {
331: unsigned int i = wc - 0xe000;
332: r[1] = (i % 94) + 0xa1; i = i / 94;
333: r[0] = (i < 6 ? i + 0xaa : i + 0xf2);
334: return 2;
335: } else {
336: unsigned int i = wc - 0xe4c6;
337: r[0] = (i / 96) + 0xa1; i = i % 96;
338: r[1] = i + (i >= 0x3f ? 0x41 : 0x40);
339: return 2;
340: }
341: } else {
342: /* User-defined characters, two-byte part of range U+E766..U+E864 */
343: unsigned int k1 = 0;
344: unsigned int k2 = 32;
345: /* Invariant: We know that if wc occurs in Unicode interval in
346: gb18030_pua2charset, it does so at a k with k1 <= k < k2. */
347: while (k1 < k2) {
348: unsigned int k = (k1 + k2) / 2;
349: if (wc < gb18030_pua2charset[k*3+0])
350: k2 = k;
351: else if (wc > gb18030_pua2charset[k*3+1])
352: k1 = k + 1;
353: else {
354: unsigned short c =
355: gb18030_pua2charset[k*3+2] + (wc - gb18030_pua2charset[k*3+0]);
356: r[0] = (c >> 8);
357: r[1] = (c & 0xff);
358: return 2;
359: }
360: }
361: }
362: } else
363: return RET_TOOSMALL;
364: }
365: ret = gb18030uni_wctomb(conv,r,wc,n);
366: if (ret != RET_ILUNI)
367: return ret;
368:
369: /* Code set 3 (Unicode U+10000..U+10FFFF) */
370: if (n >= 4) {
371: if (wc >= 0x10000 && wc < 0x110000) {
372: unsigned int i = wc - 0x10000;
373: r[3] = (i % 10) + 0x30; i = i / 10;
374: r[2] = (i % 126) + 0x81; i = i / 126;
375: r[1] = (i % 10) + 0x30; i = i / 10;
376: r[0] = i + 0x90;
377: return 4;
378: }
379: return RET_ILUNI;
380: }
381: return RET_TOOSMALL;
382: }
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