source: MondoRescue/branches/3.2/mindi-busybox/libbb/unicode.c

Last change on this file was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 30.8 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Unicode support routines.
4 *
5 * Copyright (C) 2009 Denys Vlasenko
6 *
7 * Licensed under GPLv2, see file LICENSE in this source tree.
8 */
9#include "libbb.h"
10#include "unicode.h"
11
12/* If it's not #defined as a constant in unicode.h... */
13#ifndef unicode_status
14uint8_t unicode_status;
15#endif
16
17/* This file is compiled only if UNICODE_SUPPORT is on.
18 * We check other options and decide whether to use libc support
19 * via locale, or use our own logic:
20 */
21
22#if ENABLE_UNICODE_USING_LOCALE
23
24/* Unicode support using libc locale support. */
25
26void FAST_FUNC reinit_unicode(const char *LANG)
27{
28 static const char unicode_0x394[] = { 0xce, 0x94, 0 };
29 size_t width;
30
31//TODO: avoid repeated calls by caching last string?
32 setlocale(LC_ALL, (LANG && LANG[0]) ? LANG : "C");
33
34 /* In unicode, this is a one character string */
35// can use unicode_strlen(string) too, but otherwise unicode_strlen() is unused
36 width = mbstowcs(NULL, unicode_0x394, INT_MAX);
37 unicode_status = (width == 1 ? UNICODE_ON : UNICODE_OFF);
38}
39
40void FAST_FUNC init_unicode(void)
41{
42 if (unicode_status == UNICODE_UNKNOWN)
43 reinit_unicode(getenv("LANG"));
44}
45
46#else
47
48/* Homegrown Unicode support. It knows only C and Unicode locales. */
49
50# if ENABLE_FEATURE_CHECK_UNICODE_IN_ENV
51void FAST_FUNC reinit_unicode(const char *LANG)
52{
53 unicode_status = UNICODE_OFF;
54 if (!LANG || !(strstr(LANG, ".utf") || strstr(LANG, ".UTF")))
55 return;
56 unicode_status = UNICODE_ON;
57}
58
59void FAST_FUNC init_unicode(void)
60{
61 if (unicode_status == UNICODE_UNKNOWN)
62 reinit_unicode(getenv("LANG"));
63}
64# endif
65
66static size_t wcrtomb_internal(char *s, wchar_t wc)
67{
68 int n, i;
69 uint32_t v = wc;
70
71 if (v <= 0x7f) {
72 *s = v;
73 return 1;
74 }
75
76 /* RFC 3629 says that Unicode ends at 10FFFF,
77 * but we cover entire 32 bits */
78
79 /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
80 /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
81 /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */
82 /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */
83 /* 80-7FF -> 110yyyxx 10xxxxxx */
84
85 /* How many bytes do we need? */
86 n = 2;
87 /* (0x80000000+ would result in n = 7, limiting n to 6) */
88 while (v >= 0x800 && n < 6) {
89 v >>= 5;
90 n++;
91 }
92 /* Fill bytes n-1..1 */
93 i = n;
94 while (--i) {
95 s[i] = (wc & 0x3f) | 0x80;
96 wc >>= 6;
97 }
98 /* Fill byte 0 */
99 s[0] = wc | (uint8_t)(0x3f00 >> n);
100 return n;
101}
102size_t FAST_FUNC wcrtomb(char *s, wchar_t wc, mbstate_t *ps UNUSED_PARAM)
103{
104 if (unicode_status != UNICODE_ON) {
105 *s = wc;
106 return 1;
107 }
108
109 return wcrtomb_internal(s, wc);
110}
111size_t FAST_FUNC wcstombs(char *dest, const wchar_t *src, size_t n)
112{
113 size_t org_n = n;
114
115 if (unicode_status != UNICODE_ON) {
116 while (n) {
117 wchar_t c = *src++;
118 *dest++ = c;
119 if (c == 0)
120 break;
121 n--;
122 }
123 return org_n - n;
124 }
125
126 while (n >= MB_CUR_MAX) {
127 wchar_t wc = *src++;
128 size_t len = wcrtomb_internal(dest, wc);
129
130 if (wc == L'\0')
131 return org_n - n;
132 dest += len;
133 n -= len;
134 }
135 while (n) {
136 char tbuf[MB_CUR_MAX];
137 wchar_t wc = *src++;
138 size_t len = wcrtomb_internal(tbuf, wc);
139
140 if (len > n)
141 break;
142 memcpy(dest, tbuf, len);
143 if (wc == L'\0')
144 return org_n - n;
145 dest += len;
146 n -= len;
147 }
148 return org_n - n;
149}
150
151# define ERROR_WCHAR (~(wchar_t)0)
152
153static const char *mbstowc_internal(wchar_t *res, const char *src)
154{
155 int bytes;
156 unsigned c = (unsigned char) *src++;
157
158 if (c <= 0x7f) {
159 *res = c;
160 return src;
161 }
162
163 /* 80-7FF -> 110yyyxx 10xxxxxx */
164 /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */
165 /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */
166 /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
167 /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
168 bytes = 0;
169 do {
170 c <<= 1;
171 bytes++;
172 } while ((c & 0x80) && bytes < 6);
173 if (bytes == 1) {
174 /* A bare "continuation" byte. Say, 80 */
175 *res = ERROR_WCHAR;
176 return src;
177 }
178 c = (uint8_t)(c) >> bytes;
179
180 while (--bytes) {
181 unsigned ch = (unsigned char) *src;
182 if ((ch & 0xc0) != 0x80) {
183 /* Missing "continuation" byte. Example: e0 80 */
184 *res = ERROR_WCHAR;
185 return src;
186 }
187 c = (c << 6) + (ch & 0x3f);
188 src++;
189 }
190
191 /* TODO */
192 /* Need to check that c isn't produced by overlong encoding */
193 /* Example: 11000000 10000000 converts to NUL */
194 /* 11110000 10000000 10000100 10000000 converts to 0x100 */
195 /* correct encoding: 11000100 10000000 */
196 if (c <= 0x7f) { /* crude check */
197 *res = ERROR_WCHAR;
198 return src;
199 }
200
201 *res = c;
202 return src;
203}
204size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n)
205{
206 size_t org_n = n;
207
208 if (unicode_status != UNICODE_ON) {
209 while (n) {
210 unsigned char c = *src++;
211
212 if (dest)
213 *dest++ = c;
214 if (c == 0)
215 break;
216 n--;
217 }
218 return org_n - n;
219 }
220
221 while (n) {
222 wchar_t wc;
223 src = mbstowc_internal(&wc, src);
224 if (wc == ERROR_WCHAR) /* error */
225 return (size_t) -1L;
226 if (dest)
227 *dest++ = wc;
228 if (wc == 0) /* end-of-string */
229 break;
230 n--;
231 }
232
233 return org_n - n;
234}
235
236int FAST_FUNC iswspace(wint_t wc)
237{
238 return (unsigned)wc <= 0x7f && isspace(wc);
239}
240
241int FAST_FUNC iswalnum(wint_t wc)
242{
243 return (unsigned)wc <= 0x7f && isalnum(wc);
244}
245
246int FAST_FUNC iswpunct(wint_t wc)
247{
248 return (unsigned)wc <= 0x7f && ispunct(wc);
249}
250
251
252# if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
253struct interval {
254 uint16_t first;
255 uint16_t last;
256};
257
258/* auxiliary function for binary search in interval table */
259static int in_interval_table(unsigned ucs, const struct interval *table, unsigned max)
260{
261 unsigned min;
262 unsigned mid;
263
264 if (ucs < table[0].first || ucs > table[max].last)
265 return 0;
266
267 min = 0;
268 while (max >= min) {
269 mid = (min + max) / 2;
270 if (ucs > table[mid].last)
271 min = mid + 1;
272 else if (ucs < table[mid].first)
273 max = mid - 1;
274 else
275 return 1;
276 }
277 return 0;
278}
279
280static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max)
281{
282 unsigned min;
283 unsigned mid;
284 unsigned first, last;
285
286 first = table[0] >> 2;
287 last = first + (table[0] & 3);
288 if (ucs < first || ucs > last)
289 return 0;
290
291 min = 0;
292 while (max >= min) {
293 mid = (min + max) / 2;
294 first = table[mid] >> 2;
295 last = first + (table[mid] & 3);
296 if (ucs > last)
297 min = mid + 1;
298 else if (ucs < first)
299 max = mid - 1;
300 else
301 return 1;
302 }
303 return 0;
304}
305# endif
306
307
308/*
309 * This is an implementation of wcwidth() and wcswidth() (defined in
310 * IEEE Std 1002.1-2001) for Unicode.
311 *
312 * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
313 * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
314 *
315 * In fixed-width output devices, Latin characters all occupy a single
316 * "cell" position of equal width, whereas ideographic CJK characters
317 * occupy two such cells. Interoperability between terminal-line
318 * applications and (teletype-style) character terminals using the
319 * UTF-8 encoding requires agreement on which character should advance
320 * the cursor by how many cell positions. No established formal
321 * standards exist at present on which Unicode character shall occupy
322 * how many cell positions on character terminals. These routines are
323 * a first attempt of defining such behavior based on simple rules
324 * applied to data provided by the Unicode Consortium.
325 *
326 * For some graphical characters, the Unicode standard explicitly
327 * defines a character-cell width via the definition of the East Asian
328 * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
329 * In all these cases, there is no ambiguity about which width a
330 * terminal shall use. For characters in the East Asian Ambiguous (A)
331 * class, the width choice depends purely on a preference of backward
332 * compatibility with either historic CJK or Western practice.
333 * Choosing single-width for these characters is easy to justify as
334 * the appropriate long-term solution, as the CJK practice of
335 * displaying these characters as double-width comes from historic
336 * implementation simplicity (8-bit encoded characters were displayed
337 * single-width and 16-bit ones double-width, even for Greek,
338 * Cyrillic, etc.) and not any typographic considerations.
339 *
340 * Much less clear is the choice of width for the Not East Asian
341 * (Neutral) class. Existing practice does not dictate a width for any
342 * of these characters. It would nevertheless make sense
343 * typographically to allocate two character cells to characters such
344 * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
345 * represented adequately with a single-width glyph. The following
346 * routines at present merely assign a single-cell width to all
347 * neutral characters, in the interest of simplicity. This is not
348 * entirely satisfactory and should be reconsidered before
349 * establishing a formal standard in this area. At the moment, the
350 * decision which Not East Asian (Neutral) characters should be
351 * represented by double-width glyphs cannot yet be answered by
352 * applying a simple rule from the Unicode database content. Setting
353 * up a proper standard for the behavior of UTF-8 character terminals
354 * will require a careful analysis not only of each Unicode character,
355 * but also of each presentation form, something the author of these
356 * routines has avoided to do so far.
357 *
358 * http://www.unicode.org/unicode/reports/tr11/
359 *
360 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
361 *
362 * Permission to use, copy, modify, and distribute this software
363 * for any purpose and without fee is hereby granted. The author
364 * disclaims all warranties with regard to this software.
365 *
366 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
367 */
368
369/* Assigned Unicode character ranges:
370 * Plane Range
371 * 0 0000–FFFF Basic Multilingual Plane
372 * 1 10000–1FFFF Supplementary Multilingual Plane
373 * 2 20000–2FFFF Supplementary Ideographic Plane
374 * 3 30000-3FFFF Tertiary Ideographic Plane (no chars assigned yet)
375 * 4-13 40000–DFFFF currently unassigned
376 * 14 E0000–EFFFF Supplementary Special-purpose Plane
377 * 15 F0000–FFFFF Supplementary Private Use Area-A
378 * 16 100000–10FFFF Supplementary Private Use Area-B
379 *
380 * "Supplementary Special-purpose Plane currently contains non-graphical
381 * characters in two blocks of 128 and 240 characters. The first block
382 * is for language tag characters for use when language cannot be indicated
383 * through other protocols (such as the xml:lang attribute in XML).
384 * The other block contains glyph variation selectors to indicate
385 * an alternate glyph for a character that cannot be determined by context."
386 *
387 * In simpler terms: it is a tool to fix the "Han unification" mess
388 * created by Unicode committee, to select Chinese/Japanese/Korean/Taiwan
389 * version of a character. (They forgot that the whole purpose of the Unicode
390 * was to be able to write all chars in one charset without such tricks).
391 * Until East Asian users say it is actually necessary to support these
392 * code points in console applications like busybox
393 * (i.e. do these chars ever appear in filenames, hostnames, text files
394 * and such?), we are treating these code points as invalid.
395 *
396 * Tertiary Ideographic Plane is also ignored for now,
397 * until Unicode committee assigns something there.
398 */
399/* The following two functions define the column width of an ISO 10646
400 * character as follows:
401 *
402 * - The null character (U+0000) has a column width of 0.
403 *
404 * - Other C0/C1 control characters and DEL will lead to a return
405 * value of -1.
406 *
407 * - Non-spacing and enclosing combining characters (general
408 * category code Mn or Me in the Unicode database) have a
409 * column width of 0.
410 *
411 * - SOFT HYPHEN (U+00AD) has a column width of 1.
412 *
413 * - Other format characters (general category code Cf in the Unicode
414 * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
415 *
416 * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
417 * have a column width of 0.
418 *
419 * - Spacing characters in the East Asian Wide (W) or East Asian
420 * Full-width (F) category as defined in Unicode Technical
421 * Report #11 have a column width of 2.
422 *
423 * - All remaining characters (including all printable
424 * ISO 8859-1 and WGL4 characters, Unicode control characters,
425 * etc.) have a column width of 1.
426 *
427 * This implementation assumes that wchar_t characters are encoded
428 * in ISO 10646.
429 */
430int FAST_FUNC wcwidth(unsigned ucs)
431{
432# if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
433 /* sorted list of non-overlapping intervals of non-spacing characters */
434 /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
435# define BIG_(a,b) { a, b },
436# define PAIR(a,b)
437# define ARRAY /* PAIR if < 0x4000 and no more than 4 chars big */ \
438 BIG_(0x0300, 0x036F) \
439 PAIR(0x0483, 0x0486) \
440 PAIR(0x0488, 0x0489) \
441 BIG_(0x0591, 0x05BD) \
442 PAIR(0x05BF, 0x05BF) \
443 PAIR(0x05C1, 0x05C2) \
444 PAIR(0x05C4, 0x05C5) \
445 PAIR(0x05C7, 0x05C7) \
446 PAIR(0x0600, 0x0603) \
447 BIG_(0x0610, 0x0615) \
448 BIG_(0x064B, 0x065E) \
449 PAIR(0x0670, 0x0670) \
450 BIG_(0x06D6, 0x06E4) \
451 PAIR(0x06E7, 0x06E8) \
452 PAIR(0x06EA, 0x06ED) \
453 PAIR(0x070F, 0x070F) \
454 PAIR(0x0711, 0x0711) \
455 BIG_(0x0730, 0x074A) \
456 BIG_(0x07A6, 0x07B0) \
457 BIG_(0x07EB, 0x07F3) \
458 PAIR(0x0901, 0x0902) \
459 PAIR(0x093C, 0x093C) \
460 BIG_(0x0941, 0x0948) \
461 PAIR(0x094D, 0x094D) \
462 PAIR(0x0951, 0x0954) \
463 PAIR(0x0962, 0x0963) \
464 PAIR(0x0981, 0x0981) \
465 PAIR(0x09BC, 0x09BC) \
466 PAIR(0x09C1, 0x09C4) \
467 PAIR(0x09CD, 0x09CD) \
468 PAIR(0x09E2, 0x09E3) \
469 PAIR(0x0A01, 0x0A02) \
470 PAIR(0x0A3C, 0x0A3C) \
471 PAIR(0x0A41, 0x0A42) \
472 PAIR(0x0A47, 0x0A48) \
473 PAIR(0x0A4B, 0x0A4D) \
474 PAIR(0x0A70, 0x0A71) \
475 PAIR(0x0A81, 0x0A82) \
476 PAIR(0x0ABC, 0x0ABC) \
477 BIG_(0x0AC1, 0x0AC5) \
478 PAIR(0x0AC7, 0x0AC8) \
479 PAIR(0x0ACD, 0x0ACD) \
480 PAIR(0x0AE2, 0x0AE3) \
481 PAIR(0x0B01, 0x0B01) \
482 PAIR(0x0B3C, 0x0B3C) \
483 PAIR(0x0B3F, 0x0B3F) \
484 PAIR(0x0B41, 0x0B43) \
485 PAIR(0x0B4D, 0x0B4D) \
486 PAIR(0x0B56, 0x0B56) \
487 PAIR(0x0B82, 0x0B82) \
488 PAIR(0x0BC0, 0x0BC0) \
489 PAIR(0x0BCD, 0x0BCD) \
490 PAIR(0x0C3E, 0x0C40) \
491 PAIR(0x0C46, 0x0C48) \
492 PAIR(0x0C4A, 0x0C4D) \
493 PAIR(0x0C55, 0x0C56) \
494 PAIR(0x0CBC, 0x0CBC) \
495 PAIR(0x0CBF, 0x0CBF) \
496 PAIR(0x0CC6, 0x0CC6) \
497 PAIR(0x0CCC, 0x0CCD) \
498 PAIR(0x0CE2, 0x0CE3) \
499 PAIR(0x0D41, 0x0D43) \
500 PAIR(0x0D4D, 0x0D4D) \
501 PAIR(0x0DCA, 0x0DCA) \
502 PAIR(0x0DD2, 0x0DD4) \
503 PAIR(0x0DD6, 0x0DD6) \
504 PAIR(0x0E31, 0x0E31) \
505 BIG_(0x0E34, 0x0E3A) \
506 BIG_(0x0E47, 0x0E4E) \
507 PAIR(0x0EB1, 0x0EB1) \
508 BIG_(0x0EB4, 0x0EB9) \
509 PAIR(0x0EBB, 0x0EBC) \
510 BIG_(0x0EC8, 0x0ECD) \
511 PAIR(0x0F18, 0x0F19) \
512 PAIR(0x0F35, 0x0F35) \
513 PAIR(0x0F37, 0x0F37) \
514 PAIR(0x0F39, 0x0F39) \
515 BIG_(0x0F71, 0x0F7E) \
516 BIG_(0x0F80, 0x0F84) \
517 PAIR(0x0F86, 0x0F87) \
518 PAIR(0x0FC6, 0x0FC6) \
519 BIG_(0x0F90, 0x0F97) \
520 BIG_(0x0F99, 0x0FBC) \
521 PAIR(0x102D, 0x1030) \
522 PAIR(0x1032, 0x1032) \
523 PAIR(0x1036, 0x1037) \
524 PAIR(0x1039, 0x1039) \
525 PAIR(0x1058, 0x1059) \
526 BIG_(0x1160, 0x11FF) \
527 PAIR(0x135F, 0x135F) \
528 PAIR(0x1712, 0x1714) \
529 PAIR(0x1732, 0x1734) \
530 PAIR(0x1752, 0x1753) \
531 PAIR(0x1772, 0x1773) \
532 PAIR(0x17B4, 0x17B5) \
533 BIG_(0x17B7, 0x17BD) \
534 PAIR(0x17C6, 0x17C6) \
535 BIG_(0x17C9, 0x17D3) \
536 PAIR(0x17DD, 0x17DD) \
537 PAIR(0x180B, 0x180D) \
538 PAIR(0x18A9, 0x18A9) \
539 PAIR(0x1920, 0x1922) \
540 PAIR(0x1927, 0x1928) \
541 PAIR(0x1932, 0x1932) \
542 PAIR(0x1939, 0x193B) \
543 PAIR(0x1A17, 0x1A18) \
544 PAIR(0x1B00, 0x1B03) \
545 PAIR(0x1B34, 0x1B34) \
546 BIG_(0x1B36, 0x1B3A) \
547 PAIR(0x1B3C, 0x1B3C) \
548 PAIR(0x1B42, 0x1B42) \
549 BIG_(0x1B6B, 0x1B73) \
550 BIG_(0x1DC0, 0x1DCA) \
551 PAIR(0x1DFE, 0x1DFF) \
552 BIG_(0x200B, 0x200F) \
553 BIG_(0x202A, 0x202E) \
554 PAIR(0x2060, 0x2063) \
555 BIG_(0x206A, 0x206F) \
556 BIG_(0x20D0, 0x20EF) \
557 BIG_(0x302A, 0x302F) \
558 PAIR(0x3099, 0x309A) \
559 /* Too big to be packed in PAIRs: */ \
560 BIG_(0xA806, 0xA806) \
561 BIG_(0xA80B, 0xA80B) \
562 BIG_(0xA825, 0xA826) \
563 BIG_(0xFB1E, 0xFB1E) \
564 BIG_(0xFE00, 0xFE0F) \
565 BIG_(0xFE20, 0xFE23) \
566 BIG_(0xFEFF, 0xFEFF) \
567 BIG_(0xFFF9, 0xFFFB)
568 static const struct interval combining[] = { ARRAY };
569# undef BIG_
570# undef PAIR
571# define BIG_(a,b)
572# define PAIR(a,b) (a << 2) | (b-a),
573 static const uint16_t combining1[] = { ARRAY };
574# undef BIG_
575# undef PAIR
576# define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
577# define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
578 struct CHECK { ARRAY };
579# undef BIG_
580# undef PAIR
581# undef ARRAY
582# endif
583
584 if (ucs == 0)
585 return 0;
586
587 /* Test for 8-bit control characters (00-1f, 80-9f, 7f) */
588 if ((ucs & ~0x80) < 0x20 || ucs == 0x7f)
589 return -1;
590 /* Quick abort if it is an obviously invalid char */
591 if (ucs > CONFIG_LAST_SUPPORTED_WCHAR)
592 return -1;
593
594 /* Optimization: no combining chars below 0x300 */
595 if (CONFIG_LAST_SUPPORTED_WCHAR < 0x300 || ucs < 0x300)
596 return 1;
597
598# if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
599 /* Binary search in table of non-spacing characters */
600 if (in_interval_table(ucs, combining, ARRAY_SIZE(combining) - 1))
601 return 0;
602 if (in_uint16_table(ucs, combining1, ARRAY_SIZE(combining1) - 1))
603 return 0;
604
605 /* Optimization: all chars below 0x1100 are not double-width */
606 if (CONFIG_LAST_SUPPORTED_WCHAR < 0x1100 || ucs < 0x1100)
607 return 1;
608
609# if CONFIG_LAST_SUPPORTED_WCHAR >= 0x1100
610 /* Invalid code points: */
611 /* High (d800..dbff) and low (dc00..dfff) surrogates (valid only in UTF16) */
612 /* Private Use Area (e000..f8ff) */
613 /* Noncharacters fdd0..fdef */
614 if ((CONFIG_LAST_SUPPORTED_WCHAR >= 0xd800 && ucs >= 0xd800 && ucs <= 0xf8ff)
615 || (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfdd0 && ucs >= 0xfdd0 && ucs <= 0xfdef)
616 ) {
617 return -1;
618 }
619 /* 0xfffe and 0xffff in every plane are invalid */
620 if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfffe && ((ucs & 0xfffe) == 0xfffe)) {
621 return -1;
622 }
623
624# if CONFIG_LAST_SUPPORTED_WCHAR >= 0x10000
625 if (ucs >= 0x10000) {
626 /* Combining chars in Supplementary Multilingual Plane 0x1xxxx */
627 static const struct interval combining0x10000[] = {
628 { 0x0A01, 0x0A03 }, { 0x0A05, 0x0A06 }, { 0x0A0C, 0x0A0F },
629 { 0x0A38, 0x0A3A }, { 0x0A3F, 0x0A3F }, { 0xD167, 0xD169 },
630 { 0xD173, 0xD182 }, { 0xD185, 0xD18B }, { 0xD1AA, 0xD1AD },
631 { 0xD242, 0xD244 }
632 };
633 /* Binary search in table of non-spacing characters in Supplementary Multilingual Plane */
634 if (in_interval_table(ucs ^ 0x10000, combining0x10000, ARRAY_SIZE(combining0x10000) - 1))
635 return 0;
636 /* Check a few non-spacing chars in Supplementary Special-purpose Plane 0xExxxx */
637 if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xE0001
638 && ( ucs == 0xE0001
639 || (ucs >= 0xE0020 && ucs <= 0xE007F)
640 || (ucs >= 0xE0100 && ucs <= 0xE01EF)
641 )
642 ) {
643 return 0;
644 }
645 }
646# endif
647
648 /* If we arrive here, ucs is not a combining or C0/C1 control character.
649 * Check whether it's 1 char or 2-shar wide.
650 */
651 return 1 +
652 ( (/*ucs >= 0x1100 &&*/ ucs <= 0x115f) /* Hangul Jamo init. consonants */
653 || ucs == 0x2329 /* left-pointing angle bracket; also CJK punct. char */
654 || ucs == 0x232a /* right-pointing angle bracket; also CJK punct. char */
655 || (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) /* CJK ... Yi */
656# if CONFIG_LAST_SUPPORTED_WCHAR >= 0xac00
657 || (ucs >= 0xac00 && ucs <= 0xd7a3) /* Hangul Syllables */
658 || (ucs >= 0xf900 && ucs <= 0xfaff) /* CJK Compatibility Ideographs */
659 || (ucs >= 0xfe10 && ucs <= 0xfe19) /* Vertical forms */
660 || (ucs >= 0xfe30 && ucs <= 0xfe6f) /* CJK Compatibility Forms */
661 || (ucs >= 0xff00 && ucs <= 0xff60) /* Fullwidth Forms */
662 || (ucs >= 0xffe0 && ucs <= 0xffe6)
663 || ((ucs >> 17) == (2 >> 1)) /* 20000..3ffff: Supplementary and Tertiary Ideographic Planes */
664# endif
665 );
666# endif /* >= 0x1100 */
667# endif /* >= 0x300 */
668}
669
670
671# if ENABLE_UNICODE_BIDI_SUPPORT
672int FAST_FUNC unicode_bidi_isrtl(wint_t wc)
673{
674 /* ranges taken from
675 * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt
676 * Bidi_Class=Left_To_Right | Bidi_Class=Arabic_Letter
677 */
678# define BIG_(a,b) { a, b },
679# define PAIR(a,b)
680# define ARRAY \
681 PAIR(0x0590, 0x0590) \
682 PAIR(0x05BE, 0x05BE) \
683 PAIR(0x05C0, 0x05C0) \
684 PAIR(0x05C3, 0x05C3) \
685 PAIR(0x05C6, 0x05C6) \
686 BIG_(0x05C8, 0x05FF) \
687 PAIR(0x0604, 0x0605) \
688 PAIR(0x0608, 0x0608) \
689 PAIR(0x060B, 0x060B) \
690 PAIR(0x060D, 0x060D) \
691 BIG_(0x061B, 0x064A) \
692 PAIR(0x065F, 0x065F) \
693 PAIR(0x066D, 0x066F) \
694 BIG_(0x0671, 0x06D5) \
695 PAIR(0x06E5, 0x06E6) \
696 PAIR(0x06EE, 0x06EF) \
697 BIG_(0x06FA, 0x070E) \
698 PAIR(0x0710, 0x0710) \
699 BIG_(0x0712, 0x072F) \
700 BIG_(0x074B, 0x07A5) \
701 BIG_(0x07B1, 0x07EA) \
702 PAIR(0x07F4, 0x07F5) \
703 BIG_(0x07FA, 0x0815) \
704 PAIR(0x081A, 0x081A) \
705 PAIR(0x0824, 0x0824) \
706 PAIR(0x0828, 0x0828) \
707 BIG_(0x082E, 0x08FF) \
708 PAIR(0x200F, 0x200F) \
709 PAIR(0x202B, 0x202B) \
710 PAIR(0x202E, 0x202E) \
711 BIG_(0xFB1D, 0xFB1D) \
712 BIG_(0xFB1F, 0xFB28) \
713 BIG_(0xFB2A, 0xFD3D) \
714 BIG_(0xFD40, 0xFDCF) \
715 BIG_(0xFDC8, 0xFDCF) \
716 BIG_(0xFDF0, 0xFDFC) \
717 BIG_(0xFDFE, 0xFDFF) \
718 BIG_(0xFE70, 0xFEFE)
719 /* Probably not necessary
720 {0x10800, 0x1091E},
721 {0x10920, 0x10A00},
722 {0x10A04, 0x10A04},
723 {0x10A07, 0x10A0B},
724 {0x10A10, 0x10A37},
725 {0x10A3B, 0x10A3E},
726 {0x10A40, 0x10A7F},
727 {0x10B36, 0x10B38},
728 {0x10B40, 0x10E5F},
729 {0x10E7F, 0x10FFF},
730 {0x1E800, 0x1EFFF}
731 */
732 static const struct interval rtl_b[] = { ARRAY };
733# undef BIG_
734# undef PAIR
735# define BIG_(a,b)
736# define PAIR(a,b) (a << 2) | (b-a),
737 static const uint16_t rtl_p[] = { ARRAY };
738# undef BIG_
739# undef PAIR
740# define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
741# define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
742 struct CHECK { ARRAY };
743# undef BIG_
744# undef PAIR
745# undef ARRAY
746
747 if (in_interval_table(wc, rtl_b, ARRAY_SIZE(rtl_b) - 1))
748 return 1;
749 if (in_uint16_table(wc, rtl_p, ARRAY_SIZE(rtl_p) - 1))
750 return 1;
751 return 0;
752}
753
754# if ENABLE_UNICODE_NEUTRAL_TABLE
755int FAST_FUNC unicode_bidi_is_neutral_wchar(wint_t wc)
756{
757 /* ranges taken from
758 * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt
759 * Bidi_Classes: Paragraph_Separator, Segment_Separator,
760 * White_Space, Other_Neutral, European_Number, European_Separator,
761 * European_Terminator, Arabic_Number, Common_Separator
762 */
763# define BIG_(a,b) { a, b },
764# define PAIR(a,b)
765# define ARRAY \
766 BIG_(0x0009, 0x000D) \
767 BIG_(0x001C, 0x0040) \
768 BIG_(0x005B, 0x0060) \
769 PAIR(0x007B, 0x007E) \
770 PAIR(0x0085, 0x0085) \
771 BIG_(0x00A0, 0x00A9) \
772 PAIR(0x00AB, 0x00AC) \
773 BIG_(0x00AE, 0x00B4) \
774 PAIR(0x00B6, 0x00B9) \
775 BIG_(0x00BB, 0x00BF) \
776 PAIR(0x00D7, 0x00D7) \
777 PAIR(0x00F7, 0x00F7) \
778 PAIR(0x02B9, 0x02BA) \
779 BIG_(0x02C2, 0x02CF) \
780 BIG_(0x02D2, 0x02DF) \
781 BIG_(0x02E5, 0x02FF) \
782 PAIR(0x0374, 0x0375) \
783 PAIR(0x037E, 0x037E) \
784 PAIR(0x0384, 0x0385) \
785 PAIR(0x0387, 0x0387) \
786 PAIR(0x03F6, 0x03F6) \
787 PAIR(0x058A, 0x058A) \
788 PAIR(0x0600, 0x0603) \
789 PAIR(0x0606, 0x0607) \
790 PAIR(0x0609, 0x060A) \
791 PAIR(0x060C, 0x060C) \
792 PAIR(0x060E, 0x060F) \
793 BIG_(0x0660, 0x066C) \
794 PAIR(0x06DD, 0x06DD) \
795 PAIR(0x06E9, 0x06E9) \
796 BIG_(0x06F0, 0x06F9) \
797 PAIR(0x07F6, 0x07F9) \
798 PAIR(0x09F2, 0x09F3) \
799 PAIR(0x09FB, 0x09FB) \
800 PAIR(0x0AF1, 0x0AF1) \
801 BIG_(0x0BF3, 0x0BFA) \
802 BIG_(0x0C78, 0x0C7E) \
803 PAIR(0x0CF1, 0x0CF2) \
804 PAIR(0x0E3F, 0x0E3F) \
805 PAIR(0x0F3A, 0x0F3D) \
806 BIG_(0x1390, 0x1400) \
807 PAIR(0x1680, 0x1680) \
808 PAIR(0x169B, 0x169C) \
809 PAIR(0x17DB, 0x17DB) \
810 BIG_(0x17F0, 0x17F9) \
811 BIG_(0x1800, 0x180A) \
812 PAIR(0x180E, 0x180E) \
813 PAIR(0x1940, 0x1940) \
814 PAIR(0x1944, 0x1945) \
815 BIG_(0x19DE, 0x19FF) \
816 PAIR(0x1FBD, 0x1FBD) \
817 PAIR(0x1FBF, 0x1FC1) \
818 PAIR(0x1FCD, 0x1FCF) \
819 PAIR(0x1FDD, 0x1FDF) \
820 PAIR(0x1FED, 0x1FEF) \
821 PAIR(0x1FFD, 0x1FFE) \
822 BIG_(0x2000, 0x200A) \
823 BIG_(0x2010, 0x2029) \
824 BIG_(0x202F, 0x205F) \
825 PAIR(0x2070, 0x2070) \
826 BIG_(0x2074, 0x207E) \
827 BIG_(0x2080, 0x208E) \
828 BIG_(0x20A0, 0x20B8) \
829 PAIR(0x2100, 0x2101) \
830 PAIR(0x2103, 0x2106) \
831 PAIR(0x2108, 0x2109) \
832 PAIR(0x2114, 0x2114) \
833 PAIR(0x2116, 0x2118) \
834 BIG_(0x211E, 0x2123) \
835 PAIR(0x2125, 0x2125) \
836 PAIR(0x2127, 0x2127) \
837 PAIR(0x2129, 0x2129) \
838 PAIR(0x212E, 0x212E) \
839 PAIR(0x213A, 0x213B) \
840 BIG_(0x2140, 0x2144) \
841 PAIR(0x214A, 0x214D) \
842 BIG_(0x2150, 0x215F) \
843 PAIR(0x2189, 0x2189) \
844 BIG_(0x2190, 0x2335) \
845 BIG_(0x237B, 0x2394) \
846 BIG_(0x2396, 0x23E8) \
847 BIG_(0x2400, 0x2426) \
848 BIG_(0x2440, 0x244A) \
849 BIG_(0x2460, 0x249B) \
850 BIG_(0x24EA, 0x26AB) \
851 BIG_(0x26AD, 0x26CD) \
852 BIG_(0x26CF, 0x26E1) \
853 PAIR(0x26E3, 0x26E3) \
854 BIG_(0x26E8, 0x26FF) \
855 PAIR(0x2701, 0x2704) \
856 PAIR(0x2706, 0x2709) \
857 BIG_(0x270C, 0x2727) \
858 BIG_(0x2729, 0x274B) \
859 PAIR(0x274D, 0x274D) \
860 PAIR(0x274F, 0x2752) \
861 BIG_(0x2756, 0x275E) \
862 BIG_(0x2761, 0x2794) \
863 BIG_(0x2798, 0x27AF) \
864 BIG_(0x27B1, 0x27BE) \
865 BIG_(0x27C0, 0x27CA) \
866 PAIR(0x27CC, 0x27CC) \
867 BIG_(0x27D0, 0x27FF) \
868 BIG_(0x2900, 0x2B4C) \
869 BIG_(0x2B50, 0x2B59) \
870 BIG_(0x2CE5, 0x2CEA) \
871 BIG_(0x2CF9, 0x2CFF) \
872 BIG_(0x2E00, 0x2E99) \
873 BIG_(0x2E9B, 0x2EF3) \
874 BIG_(0x2F00, 0x2FD5) \
875 BIG_(0x2FF0, 0x2FFB) \
876 BIG_(0x3000, 0x3004) \
877 BIG_(0x3008, 0x3020) \
878 PAIR(0x3030, 0x3030) \
879 PAIR(0x3036, 0x3037) \
880 PAIR(0x303D, 0x303D) \
881 PAIR(0x303E, 0x303F) \
882 PAIR(0x309B, 0x309C) \
883 PAIR(0x30A0, 0x30A0) \
884 PAIR(0x30FB, 0x30FB) \
885 BIG_(0x31C0, 0x31E3) \
886 PAIR(0x321D, 0x321E) \
887 BIG_(0x3250, 0x325F) \
888 PAIR(0x327C, 0x327E) \
889 BIG_(0x32B1, 0x32BF) \
890 PAIR(0x32CC, 0x32CF) \
891 PAIR(0x3377, 0x337A) \
892 PAIR(0x33DE, 0x33DF) \
893 PAIR(0x33FF, 0x33FF) \
894 BIG_(0x4DC0, 0x4DFF) \
895 BIG_(0xA490, 0xA4C6) \
896 BIG_(0xA60D, 0xA60F) \
897 BIG_(0xA673, 0xA673) \
898 BIG_(0xA67E, 0xA67F) \
899 BIG_(0xA700, 0xA721) \
900 BIG_(0xA788, 0xA788) \
901 BIG_(0xA828, 0xA82B) \
902 BIG_(0xA838, 0xA839) \
903 BIG_(0xA874, 0xA877) \
904 BIG_(0xFB29, 0xFB29) \
905 BIG_(0xFD3E, 0xFD3F) \
906 BIG_(0xFDFD, 0xFDFD) \
907 BIG_(0xFE10, 0xFE19) \
908 BIG_(0xFE30, 0xFE52) \
909 BIG_(0xFE54, 0xFE66) \
910 BIG_(0xFE68, 0xFE6B) \
911 BIG_(0xFF01, 0xFF20) \
912 BIG_(0xFF3B, 0xFF40) \
913 BIG_(0xFF5B, 0xFF65) \
914 BIG_(0xFFE0, 0xFFE6) \
915 BIG_(0xFFE8, 0xFFEE) \
916 BIG_(0xFFF9, 0xFFFD)
917 /*
918 {0x10101, 0x10101},
919 {0x10140, 0x1019B},
920 {0x1091F, 0x1091F},
921 {0x10B39, 0x10B3F},
922 {0x10E60, 0x10E7E},
923 {0x1D200, 0x1D241},
924 {0x1D245, 0x1D245},
925 {0x1D300, 0x1D356},
926 {0x1D6DB, 0x1D6DB},
927 {0x1D715, 0x1D715},
928 {0x1D74F, 0x1D74F},
929 {0x1D789, 0x1D789},
930 {0x1D7C3, 0x1D7C3},
931 {0x1D7CE, 0x1D7FF},
932 {0x1F000, 0x1F02B},
933 {0x1F030, 0x1F093},
934 {0x1F100, 0x1F10A}
935 */
936 static const struct interval neutral_b[] = { ARRAY };
937# undef BIG_
938# undef PAIR
939# define BIG_(a,b)
940# define PAIR(a,b) (a << 2) | (b-a),
941 static const uint16_t neutral_p[] = { ARRAY };
942# undef BIG_
943# undef PAIR
944# define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
945# define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
946 struct CHECK { ARRAY };
947# undef BIG_
948# undef PAIR
949# undef ARRAY
950
951 if (in_interval_table(wc, neutral_b, ARRAY_SIZE(neutral_b) - 1))
952 return 1;
953 if (in_uint16_table(wc, neutral_p, ARRAY_SIZE(neutral_p) - 1))
954 return 1;
955 return 0;
956}
957# endif
958
959# endif /* UNICODE_BIDI_SUPPORT */
960
961#endif /* Homegrown Unicode support */
962
963
964/* The rest is mostly same for libc and for "homegrown" support */
965
966#if 0 // UNUSED
967size_t FAST_FUNC unicode_strlen(const char *string)
968{
969 size_t width = mbstowcs(NULL, string, INT_MAX);
970 if (width == (size_t)-1L)
971 return strlen(string);
972 return width;
973}
974#endif
975
976size_t FAST_FUNC unicode_strwidth(const char *string)
977{
978 uni_stat_t uni_stat;
979 printable_string(&uni_stat, string);
980 return uni_stat.unicode_width;
981}
982
983static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags)
984{
985 char *dst;
986 unsigned dst_len;
987 unsigned uni_count;
988 unsigned uni_width;
989
990 if (unicode_status != UNICODE_ON) {
991 char *d;
992 if (flags & UNI_FLAG_PAD) {
993 d = dst = xmalloc(width + 1);
994 while ((int)--width >= 0) {
995 unsigned char c = *src;
996 if (c == '\0') {
997 do
998 *d++ = ' ';
999 while ((int)--width >= 0);
1000 break;
1001 }
1002 *d++ = (c >= ' ' && c < 0x7f) ? c : '?';
1003 src++;
1004 }
1005 *d = '\0';
1006 } else {
1007 d = dst = xstrndup(src, width);
1008 while (*d) {
1009 unsigned char c = *d;
1010 if (c < ' ' || c >= 0x7f)
1011 *d = '?';
1012 d++;
1013 }
1014 }
1015 if (stats) {
1016 stats->byte_count = (d - dst);
1017 stats->unicode_count = (d - dst);
1018 stats->unicode_width = (d - dst);
1019 }
1020 return dst;
1021 }
1022
1023 dst = NULL;
1024 uni_count = uni_width = 0;
1025 dst_len = 0;
1026 while (1) {
1027 int w;
1028 wchar_t wc;
1029
1030#if ENABLE_UNICODE_USING_LOCALE
1031 {
1032 mbstate_t mbst = { 0 };
1033 ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
1034 /* If invalid sequence is seen: -1 is returned,
1035 * src points to the invalid sequence, errno = EILSEQ.
1036 * Else number of wchars (excluding terminating L'\0')
1037 * written to dest is returned.
1038 * If len (here: 1) non-L'\0' wchars stored at dest,
1039 * src points to the next char to be converted.
1040 * If string is completely converted: src = NULL.
1041 */
1042 if (rc == 0) /* end-of-string */
1043 break;
1044 if (rc < 0) { /* error */
1045 src++;
1046 goto subst;
1047 }
1048 if (!iswprint(wc))
1049 goto subst;
1050 }
1051#else
1052 src = mbstowc_internal(&wc, src);
1053 /* src is advanced to next mb char
1054 * wc == ERROR_WCHAR: invalid sequence is seen
1055 * else: wc is set
1056 */
1057 if (wc == ERROR_WCHAR) /* error */
1058 goto subst;
1059 if (wc == 0) /* end-of-string */
1060 break;
1061#endif
1062 if (CONFIG_LAST_SUPPORTED_WCHAR && wc > CONFIG_LAST_SUPPORTED_WCHAR)
1063 goto subst;
1064 w = wcwidth(wc);
1065 if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0) /* non-printable wchar */
1066 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
1067 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
1068 ) {
1069 subst:
1070 wc = CONFIG_SUBST_WCHAR;
1071 w = 1;
1072 }
1073 width -= w;
1074 /* Note: if width == 0, we still may add more chars,
1075 * they may be zero-width or combining ones */
1076 if ((int)width < 0) {
1077 /* can't add this wc, string would become longer than width */
1078 width += w;
1079 break;
1080 }
1081
1082 uni_count++;
1083 uni_width += w;
1084 dst = xrealloc(dst, dst_len + MB_CUR_MAX);
1085#if ENABLE_UNICODE_USING_LOCALE
1086 {
1087 mbstate_t mbst = { 0 };
1088 dst_len += wcrtomb(&dst[dst_len], wc, &mbst);
1089 }
1090#else
1091 dst_len += wcrtomb_internal(&dst[dst_len], wc);
1092#endif
1093 }
1094
1095 /* Pad to remaining width */
1096 if (flags & UNI_FLAG_PAD) {
1097 dst = xrealloc(dst, dst_len + width + 1);
1098 uni_count += width;
1099 uni_width += width;
1100 while ((int)--width >= 0) {
1101 dst[dst_len++] = ' ';
1102 }
1103 }
1104 dst[dst_len] = '\0';
1105 if (stats) {
1106 stats->byte_count = dst_len;
1107 stats->unicode_count = uni_count;
1108 stats->unicode_width = uni_width;
1109 }
1110
1111 return dst;
1112}
1113char* FAST_FUNC unicode_conv_to_printable(uni_stat_t *stats, const char *src)
1114{
1115 return unicode_conv_to_printable2(stats, src, INT_MAX, 0);
1116}
1117char* FAST_FUNC unicode_conv_to_printable_fixedwidth(/*uni_stat_t *stats,*/ const char *src, unsigned width)
1118{
1119 return unicode_conv_to_printable2(/*stats:*/ NULL, src, width, UNI_FLAG_PAD);
1120}
1121
1122#ifdef UNUSED
1123char* FAST_FUNC unicode_conv_to_printable_maxwidth(uni_stat_t *stats, const char *src, unsigned maxwidth)
1124{
1125 return unicode_conv_to_printable2(stats, src, maxwidth, 0);
1126}
1127
1128unsigned FAST_FUNC unicode_padding_to_width(unsigned width, const char *src)
1129{
1130 if (unicode_status != UNICODE_ON) {
1131 return width - strnlen(src, width);
1132 }
1133
1134 while (1) {
1135 int w;
1136 wchar_t wc;
1137
1138#if ENABLE_UNICODE_USING_LOCALE
1139 {
1140 mbstate_t mbst = { 0 };
1141 ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
1142 if (rc <= 0) /* error, or end-of-string */
1143 return width;
1144 }
1145#else
1146 src = mbstowc_internal(&wc, src);
1147 if (wc == ERROR_WCHAR || wc == 0) /* error, or end-of-string */
1148 return width;
1149#endif
1150 w = wcwidth(wc);
1151 if (w < 0) /* non-printable wchar */
1152 return width;
1153 width -= w;
1154 if ((int)width <= 0) /* string is longer than width */
1155 return 0;
1156 }
1157}
1158#endif
Note: See TracBrowser for help on using the repository browser.