Annotation of embedaddon/libiconv/lib/gb18030.h, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * Copyright (C) 1999-2001, 2005, 2012, 2016 Free Software Foundation, Inc.
1.1 misho 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.
1.1.1.2 ! misho 17: * If not, see <https://www.gnu.org/licenses/>.
1.1 misho 18: */
19:
20: /*
21: * GB18030
22: */
23:
24: /*
25: * GB18030, as specified in the GB18030 standard, is an extension of GBK.
26: *
27: * In what follows, page numbers refer to the GB18030 standard (second
28: * printing).
29: *
30: *
31: * It consists of the following parts:
32: *
33: * One-byte range:
34: * ASCII p. 2 0x{00..7F}
35: *
36: * Two-byte range:
37: * GBK part 1 p. 10..12 0x{A1..A9}{A1..FE}
38: * GBK part 2 p. 13..36 0x{B0..F7}{A1..FE}
39: * GBK part 3 p. 37..52 0x{81..A0}{40..7E,80..FE}
40: * GBK part 4 p. 53..81 0x{AA..FE}{40..7E,80..A0}
41: * GBK part 5 p. 82 0x{A8..A9}{40..7E,80..A0}
42: * UDA part 1 p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
43: * UDA part 2 p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
44: * UDA part 3 p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
45: *
46: * Four-byte range:
47: * BMP rest p. 94..283 0x{81..84}{30..39}{81..FE}{30..39}
48: * rest of U+0080..U+FFFF
49: * Planes 1-16 p. 5 0x{90..FE}{30..39}{81..FE}{30..39}
50: * U+10000..U+10FFFF
51: *
52: * To GBK part 1 were added:
53: * 1. 0xA2E3, 0xA8BF.
54: * 2. Characters mapped to the Unicode PUA
55: * 0xA2AB..0xA2B0 U+E766..U+E76B
56: * 0xA2E4 U+E76D
57: * 0xA2EF..0xA2F0 U+E76E..U+E76F
58: * 0xA2FD..0xA2FE U+E770..U+E771
59: * 0xA4F4..0xA4FE U+E772..U+E77C
60: * 0xA5F7..0xA5FE U+E77D..U+E784
61: * 0xA6B9..0xA6C0 U+E785..U+E78C
62: * 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
63: * 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
64: * 0xA6F3 [glyphs here!!] U+E796
65: * 0xA6F6..0xA6FE U+E797..U+E79F
66: * 0xA7C2..0xA7D0 U+E7A0..U+E7AE
67: * 0xA7F2..0xA7FE U+E7AF..U+E7BB
68: * 0xA8BC [glyphs here!!] U+E7C7
69: * 0xA8C1..0xA8C4 U+E7C9..U+E7CC
70: * 0xA8EA..0xA8FE U+E7CD..U+E7E1
71: * 0xA9A1..0xA9A3 U+E7FE..U+E800
72: * 0xA9F0..0xA9FE U+E801..U+E80F
73: *
74: * To GBK part 2 were added:
75: * 3. Characters mapped to the Unicode PUA
76: * 0xD7FA..0xD7FE U+E810..0xE814
77: *
78: * To GBK part 3 nothing was added.
79: *
80: * To GBK part 4 were added:
81: * 4. 0xFE{50,54..58,5A..60,62..65,68..6B,6E..75,77..7D,80..8F,92..9F}.
82: * 5. Characters mapped to the Unicode PUA
83: * 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
84: * 0xFE59 [glyphs here!!] U+E81E
85: * 0xFE61 [glyphs here!!] U+E826
86: * 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
87: * 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
88: * 0xFE76 [glyphs here!!] U+E83B
89: * 0xFE7E [glyphs here!!] U+E843
90: * 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
91: * 0xFEA0 [glyphs here!!] U+E864
92: *
93: * To GBK part 5 were added:
94: * 6. 0xA98A..0xA995.
95: * 7. Characters mapped to the Unicode PUA
96: * 0xA896..0xA8A0 U+E7BC..U+E7C6
97: * 0xA958 U+E7E2
98: * 0xA95B U+E7E3
99: * 0xA95D..0xA95F U+E7E4..U+E7E6
100: * 0xA997..0xA9A0 U+E7F4..U+E7FD
101: *
102: * UDA part 1 contains the user-defined characters, mapped to the Unicode PUA
103: * U+E000..U+E233 in ascending order.
104: *
105: * UDA part 2 contains the user-defined characters, mapped to the Unicode PUA
106: * U+E234..U+E4C5 in ascending order.
107: *
108: * UDA part 3 contains the user-defined characters, mapped to the Unicode PUA
109: * U+E4C6..U+E765 in ascending order.
110: *
111: * The four-byte range 0x{81..84}{30..39}{81..FE}{30..39}
112: * contains the rest of the Unicode BMP in ascending order.
113: * Start: 0x81308130 = 0x0080
114: * End: 0x8431A439 = 0xFFFF
115: *
116: * The four-byte range 0x{90..E3}{30..39}{81..FE}{30..39}
117: * contains the remaining 16 Unicode planes in Unicode order.
118: * Start: 0x90308130 = 0x010000
119: * End: 0xE3329A35 = 0x10FFFF
120: *
121: *
122: * Unassigned Unicode characters are mapped. For example,
123: * U+173F = 0x8134BF35 (p. 120)
124: * U+2EFF = 0x81398B31 (p. 148)
125: * U+FFFE = 0x8431A438 (p. 283)
126: *
127: *
128: * The Unicode PUA (U+E000..U+F8FF) is mapped as follows:
129: * p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
130: * p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
131: * p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
132: * p. 10 0xA2AB..0xA2B0 U+E766..U+E76B
133: * p. 255 0x8336C739 U+E76C
134: * p. 10 0xA2E4 U+E76D
135: * p. 10 0xA2EF..0xA2F0 U+E76E..U+E76F
136: * p. 10 0xA2FD..0xA2FE U+E770..U+E771
137: * p. 11 0xA4F4..0xA4FE U+E772..U+E77C
138: * p. 11 0xA5F7..0xA5FE U+E77D..U+E784
139: * p. 11 0xA6B9..0xA6C0 U+E785..U+E78C
140: * p. 11 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
141: * p. 11 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
142: * p. 11 0xA6F3 [glyphs here!!] U+E796
143: * p. 11 0xA6F6..0xA6FE U+E797..U+E79F
144: * p. 12 0xA7C2..0xA7D0 U+E7A0..U+E7AE
145: * p. 12 0xA7F2..0xA7FE U+E7AF..U+E7BB
146: * p. 82 0xA896..0xA8A0 U+E7BC..U+E7C6
1.1.1.2 ! misho 147: * p. 12 0x8135F437 U+E7C7
1.1 misho 148: * p. 255 0x8336C830 U+E7C8
149: * p. 12 0xA8C1..0xA8C4 U+E7C9..U+E7CC
150: * p. 12 0xA8EA..0xA8FE U+E7CD..U+E7E1
151: * p. 82 0xA958 U+E7E2
152: * p. 82 0xA95B U+E7E3
153: * p. 82 0xA95D..0xA95F U+E7E4..U+E7E6
154: * p. 255 0x8336C831..0x8336C933 U+E7E7..U+E7F3
155: * p. 82 0xA997..0xA9A0 U+E7F4..U+E7FD
156: * p. 12 0xA9A1..0xA9A3 U+E7FE..U+E800
157: * p. 12 0xA9F0..0xA9FE U+E801..U+E80F
158: * p. 26 0xD7FA..0xD7FE U+E810..0xE814
159: * p. 255 0x8336C934 U+E815
160: * p. 81 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
161: * p. 255 0x8336C935..0x8336C939 U+E819..U+E81D
162: * p. 81 0xFE59 [glyphs here!!] U+E81E
163: * p. 255 0x8336CA30..0x8336CA36 U+E81F..U+E825
164: * p. 81 0xFE61 [glyphs here!!] U+E826
165: * p. 255 0x8336CA37..0x8336CB30 U+E827..U+E82A
166: * p. 81 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
167: * p. 255 0x8336CB31..0x8336CB34 U+E82D..U+E830
168: * p. 81 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
169: * p. 255 0x8336CB35..0x8336CC32 U+E833..U+E83A
170: * p. 81 0xFE76 [glyphs here!!] U+E83B
171: * p. 255 0x8336CC33..0x8336CC39 U+E83C..U+E842
172: * p. 81 0xFE7E [glyphs here!!] U+E843
173: * p. 255 0x8336CD30..0x8336CE35 U+E844..U+E853
174: * p. 81 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
175: * p. 255 0x8336CE36..0x8336CF39 U+E856..U+E863
176: * p. 81 0xFEA0 [glyphs here!!] U+E864
177: * p. 255..276 0x8336D030..0x84308130 U+E865..U+F8FF
178: *
179: *
180: * The Unicode surrogate area (U+D800..U+DFFF) is not mapped. (p. 255)
181: *
182: */
183:
184: #include "gb18030ext.h"
185: #include "gb18030uni.h"
186:
187: static int
1.1.1.2 ! misho 188: gb18030_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
1.1 misho 189: {
190: int ret;
191:
192: /* Code set 0 (ASCII) */
193: if (*s < 0x80)
194: return ascii_mbtowc(conv,pwc,s,n);
195:
196: /* Code set 1 (GBK extended) */
197: ret = gbk_mbtowc(conv,pwc,s,n);
198: if (ret != RET_ILSEQ)
199: return ret;
200:
201: ret = gb18030ext_mbtowc(conv,pwc,s,n);
202: if (ret != RET_ILSEQ)
203: return ret;
204:
205: /* Code set 2 (remainder of Unicode U+0000..U+FFFF), including
206: User-defined characters, two-byte part of range U+E766..U+E864 */
207: ret = gb18030uni_mbtowc(conv,pwc,s,n);
208: if (ret != RET_ILSEQ)
209: return ret;
210: /* User-defined characters range U+E000..U+E765 */
211: {
212: unsigned char c1 = s[0];
213: if ((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) {
214: if (n >= 2) {
215: unsigned char c2 = s[1];
216: if (c2 >= 0xa1 && c2 <= 0xfe) {
217: *pwc = 0xe000 + 94 * (c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c2 - 0xa1);
218: return 2;
219: }
220: } else
221: return RET_TOOFEW(0);
222: } else if (c1 >= 0xa1 && c1 <= 0xa7) {
223: if (n >= 2) {
224: unsigned char c2 = s[1];
225: if (c2 >= 0x40 && c2 <= 0xa1 && c2 != 0x7f) {
226: *pwc = 0xe4c6 + 96 * (c1 - 0xa1) + c2 - (c2 >= 0x80 ? 0x41 : 0x40);
227: return 2;
228: }
229: } else
230: return RET_TOOFEW(0);
231: }
232: }
233:
234: /* Code set 3 (Unicode U+10000..U+10FFFF) */
235: {
236: unsigned char c1 = s[0];
237: if (c1 >= 0x90 && c1 <= 0xe3) {
238: if (n >= 2) {
239: unsigned char c2 = s[1];
240: if (c2 >= 0x30 && c2 <= 0x39) {
241: if (n >= 3) {
242: unsigned char c3 = s[2];
243: if (c3 >= 0x81 && c3 <= 0xfe) {
244: if (n >= 4) {
245: unsigned char c4 = s[3];
246: if (c4 >= 0x30 && c4 <= 0x39) {
247: unsigned int i = (((c1 - 0x90) * 10 + (c2 - 0x30)) * 126 + (c3 - 0x81)) * 10 + (c4 - 0x30);
248: if (i >= 0 && i < 0x100000) {
249: *pwc = (ucs4_t) (0x10000 + i);
250: return 4;
251: }
252: }
253: return RET_ILSEQ;
254: }
255: return RET_TOOFEW(0);
256: }
257: return RET_ILSEQ;
258: }
259: return RET_TOOFEW(0);
260: }
261: return RET_ILSEQ;
262: }
263: return RET_TOOFEW(0);
264: }
265: return RET_ILSEQ;
266: }
267: }
268:
1.1.1.2 ! misho 269: static const unsigned short gb18030_pua2charset[31*3] = {
1.1 misho 270: /* Unicode range GB18030 range */
271: 0xe766, 0xe76b, 0xa2ab, /*.. 0xa2b0, */
272: 0xe76d, 0xe76d, 0xa2e4,
273: 0xe76e, 0xe76f, 0xa2ef, /*.. 0xa2f0, */
274: 0xe770, 0xe771, 0xa2fd, /*.. 0xa2fe, */
275: 0xe772, 0xe77c, 0xa4f4, /*.. 0xa4fe, */
276: 0xe77d, 0xe784, 0xa5f7, /*.. 0xa5fe, */
277: 0xe785, 0xe78c, 0xa6b9, /*.. 0xa6c0, */
278: 0xe78d, 0xe793, 0xa6d9, /*.. 0xa6df, */
279: 0xe794, 0xe795, 0xa6ec, /*.. 0xa6ed, */
280: 0xe796, 0xe796, 0xa6f3,
281: 0xe797, 0xe79f, 0xa6f6, /*.. 0xa6fe, */
282: 0xe7a0, 0xe7ae, 0xa7c2, /*.. 0xa7d0, */
283: 0xe7af, 0xe7bb, 0xa7f2, /*.. 0xa7fe, */
284: 0xe7bc, 0xe7c6, 0xa896, /*.. 0xa8a0, */
285: 0xe7c9, 0xe7cc, 0xa8c1, /*.. 0xa8c4, */
286: 0xe7cd, 0xe7e1, 0xa8ea, /*.. 0xa8fe, */
287: 0xe7e2, 0xe7e2, 0xa958,
288: 0xe7e3, 0xe7e3, 0xa95b,
289: 0xe7e4, 0xe7e6, 0xa95d, /*.. 0xa95f, */
290: 0xe7f4, 0xe800, 0xa997, /*.. 0xa9a3, */
291: 0xe801, 0xe80f, 0xa9f0, /*.. 0xa9fe, */
292: 0xe810, 0xe814, 0xd7fa, /*.. 0xd7fe, */
293: 0xe816, 0xe818, 0xfe51, /*.. 0xfe53, */
294: 0xe81e, 0xe81e, 0xfe59,
295: 0xe826, 0xe826, 0xfe61,
296: 0xe82b, 0xe82c, 0xfe66, /*.. 0xfe67, */
297: 0xe831, 0xe832, 0xfe6c, /*.. 0xfe6d, */
298: 0xe83b, 0xe83b, 0xfe76,
299: 0xe843, 0xe843, 0xfe7e,
300: 0xe854, 0xe855, 0xfe90, /*.. 0xfe91, */
301: 0xe864, 0xe864, 0xfea0,
302: };
303:
304: static int
1.1.1.2 ! misho 305: gb18030_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1 misho 306: {
307: int ret;
308:
309: /* Code set 0 (ASCII) */
310: ret = ascii_wctomb(conv,r,wc,n);
311: if (ret != RET_ILUNI)
312: return ret;
313:
314: /* Code set 1 (GBK extended) */
315: ret = gbk_wctomb(conv,r,wc,n);
316: if (ret != RET_ILUNI)
317: return ret;
318:
319: ret = gb18030ext_wctomb(conv,r,wc,n);
320: if (ret != RET_ILUNI)
321: return ret;
322:
323: /* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
324: if (wc >= 0xe000 && wc <= 0xe864) {
325: if (n >= 2) {
326: if (wc < 0xe766) {
327: /* User-defined characters range U+E000..U+E765 */
328: if (wc < 0xe4c6) {
329: unsigned int i = wc - 0xe000;
330: r[1] = (i % 94) + 0xa1; i = i / 94;
331: r[0] = (i < 6 ? i + 0xaa : i + 0xf2);
332: return 2;
333: } else {
334: unsigned int i = wc - 0xe4c6;
335: r[0] = (i / 96) + 0xa1; i = i % 96;
336: r[1] = i + (i >= 0x3f ? 0x41 : 0x40);
337: return 2;
338: }
339: } else {
340: /* User-defined characters, two-byte part of range U+E766..U+E864 */
341: unsigned int k1 = 0;
1.1.1.2 ! misho 342: unsigned int k2 = 31;
1.1 misho 343: /* Invariant: We know that if wc occurs in Unicode interval in
344: gb18030_pua2charset, it does so at a k with k1 <= k < k2. */
345: while (k1 < k2) {
346: unsigned int k = (k1 + k2) / 2;
347: if (wc < gb18030_pua2charset[k*3+0])
348: k2 = k;
349: else if (wc > gb18030_pua2charset[k*3+1])
350: k1 = k + 1;
351: else {
352: unsigned short c =
353: gb18030_pua2charset[k*3+2] + (wc - gb18030_pua2charset[k*3+0]);
354: r[0] = (c >> 8);
355: r[1] = (c & 0xff);
356: return 2;
357: }
358: }
359: }
360: } else
361: return RET_TOOSMALL;
362: }
363: ret = gb18030uni_wctomb(conv,r,wc,n);
364: if (ret != RET_ILUNI)
365: return ret;
366:
367: /* Code set 3 (Unicode U+10000..U+10FFFF) */
368: if (n >= 4) {
369: if (wc >= 0x10000 && wc < 0x110000) {
370: unsigned int i = wc - 0x10000;
371: r[3] = (i % 10) + 0x30; i = i / 10;
372: r[2] = (i % 126) + 0x81; i = i / 126;
373: r[1] = (i % 10) + 0x30; i = i / 10;
374: r[0] = i + 0x90;
375: return 4;
376: }
377: return RET_ILUNI;
378: }
379: return RET_TOOSMALL;
380: }
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