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
14 uint8_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
reinit_unicode(const char * LANG)26 void FAST_FUNC reinit_unicode(const char *LANG)
27 {
28 static const char unicode_0x394[] ALIGN1 = { 0xce, 0x94, 0 };
29 size_t width;
30
31 /* We pass "" instead of "C" because some libc's have
32 * non-ASCII default locale for setlocale("") call
33 * (this allows users of such libc to have Unicoded
34 * system without having to mess with env).
35 *
36 * We set LC_CTYPE because (a) we may be called with $LC_CTYPE
37 * value in LANG, not with $LC_ALL, (b) internationalized
38 * LC_NUMERIC and LC_TIME are more PITA than benefit
39 * (for one, some utilities have hard time with comma
40 * used as a fractional separator).
41 */
42 //TODO: avoid repeated calls by caching last string?
43 setlocale(LC_CTYPE, LANG ? LANG : "");
44
45 /* In unicode, this is a one character string */
46 width = unicode_strlen(unicode_0x394);
47 unicode_status = (width == 1 ? UNICODE_ON : UNICODE_OFF);
48 }
49
init_unicode(void)50 void FAST_FUNC init_unicode(void)
51 {
52 /* Some people set only $LC_CTYPE, not $LC_ALL, because they want
53 * only Unicode to be activated on their system, not the whole
54 * shebang of wrong decimal points, strange date formats and so on.
55 */
56 if (unicode_status == UNICODE_UNKNOWN) {
57 char *s = getenv("LC_ALL");
58 if (!s) s = getenv("LC_CTYPE");
59 if (!s) s = getenv("LANG");
60 reinit_unicode(s);
61 }
62 }
63
64 #else
65
66 /* Homegrown Unicode support. It knows only C and Unicode locales. */
67
68 # if ENABLE_FEATURE_CHECK_UNICODE_IN_ENV
reinit_unicode(const char * LANG)69 void FAST_FUNC reinit_unicode(const char *LANG)
70 {
71 unicode_status = UNICODE_OFF;
72 if (!LANG || !(strstr(LANG, ".utf") || strstr(LANG, ".UTF")))
73 return;
74 unicode_status = UNICODE_ON;
75 }
76
init_unicode(void)77 void FAST_FUNC init_unicode(void)
78 {
79 if (unicode_status == UNICODE_UNKNOWN) {
80 char *s = getenv("LC_ALL");
81 if (!s) s = getenv("LC_CTYPE");
82 if (!s) s = getenv("LANG");
83 reinit_unicode(s);
84 }
85 }
86 # endif
87
wcrtomb_internal(char * s,wchar_t wc)88 static size_t wcrtomb_internal(char *s, wchar_t wc)
89 {
90 int n, i;
91 uint32_t v = wc;
92
93 if (v <= 0x7f) {
94 *s = v;
95 return 1;
96 }
97
98 /* RFC 3629 says that Unicode ends at 10FFFF,
99 * but we cover entire 32 bits */
100
101 /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
102 /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
103 /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */
104 /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */
105 /* 80-7FF -> 110yyyxx 10xxxxxx */
106
107 /* How many bytes do we need? */
108 n = 2;
109 /* (0x80000000+ would result in n = 7, limiting n to 6) */
110 while (v >= 0x800 && n < 6) {
111 v >>= 5;
112 n++;
113 }
114 /* Fill bytes n-1..1 */
115 i = n;
116 while (--i) {
117 s[i] = (wc & 0x3f) | 0x80;
118 wc >>= 6;
119 }
120 /* Fill byte 0 */
121 s[0] = wc | (uint8_t)(0x3f00 >> n);
122 return n;
123 }
wcrtomb(char * s,wchar_t wc,mbstate_t * ps UNUSED_PARAM)124 size_t FAST_FUNC wcrtomb(char *s, wchar_t wc, mbstate_t *ps UNUSED_PARAM)
125 {
126 if (unicode_status != UNICODE_ON) {
127 *s = wc;
128 return 1;
129 }
130
131 return wcrtomb_internal(s, wc);
132 }
wcstombs(char * dest,const wchar_t * src,size_t n)133 size_t FAST_FUNC wcstombs(char *dest, const wchar_t *src, size_t n)
134 {
135 size_t org_n = n;
136
137 if (unicode_status != UNICODE_ON) {
138 while (n) {
139 wchar_t c = *src++;
140 *dest++ = c;
141 if (c == 0)
142 break;
143 n--;
144 }
145 return org_n - n;
146 }
147
148 while (n >= MB_CUR_MAX) {
149 wchar_t wc = *src++;
150 size_t len = wcrtomb_internal(dest, wc);
151
152 if (wc == L'\0')
153 return org_n - n;
154 dest += len;
155 n -= len;
156 }
157 while (n) {
158 char tbuf[MB_CUR_MAX];
159 wchar_t wc = *src++;
160 size_t len = wcrtomb_internal(tbuf, wc);
161
162 if (len > n)
163 break;
164 memcpy(dest, tbuf, len);
165 if (wc == L'\0')
166 return org_n - n;
167 dest += len;
168 n -= len;
169 }
170 return org_n - n;
171 }
172
173 # define ERROR_WCHAR (~(wchar_t)0)
174
mbstowc_internal(wchar_t * res,const char * src)175 static const char *mbstowc_internal(wchar_t *res, const char *src)
176 {
177 int bytes;
178 unsigned c = (unsigned char) *src++;
179
180 if (c <= 0x7f) {
181 *res = c;
182 return src;
183 }
184
185 /* 80-7FF -> 110yyyxx 10xxxxxx */
186 /* 800-FFFF -> 1110yyyy 10yyyyxx 10xxxxxx */
187 /* 10000-1FFFFF -> 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx */
188 /* 200000-3FFFFFF -> 111110tt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
189 /* 4000000-FFFFFFFF -> 111111tt 10tttttt 10zzzzzz 10zzyyyy 10yyyyxx 10xxxxxx */
190 bytes = 0;
191 do {
192 c <<= 1;
193 bytes++;
194 } while ((c & 0x80) && bytes < 6);
195 if (bytes == 1) {
196 /* A bare "continuation" byte. Say, 80 */
197 *res = ERROR_WCHAR;
198 return src;
199 }
200 c = (uint8_t)(c) >> bytes;
201
202 while (--bytes) {
203 unsigned ch = (unsigned char) *src;
204 if ((ch & 0xc0) != 0x80) {
205 /* Missing "continuation" byte. Example: e0 80 */
206 *res = ERROR_WCHAR;
207 return src;
208 }
209 c = (c << 6) + (ch & 0x3f);
210 src++;
211 }
212
213 /* TODO */
214 /* Need to check that c isn't produced by overlong encoding */
215 /* Example: 11000000 10000000 converts to NUL */
216 /* 11110000 10000000 10000100 10000000 converts to 0x100 */
217 /* correct encoding: 11000100 10000000 */
218 if (c <= 0x7f) { /* crude check */
219 *res = ERROR_WCHAR;
220 return src;
221 }
222
223 *res = c;
224 return src;
225 }
mbstowcs(wchar_t * dest,const char * src,size_t n)226 size_t FAST_FUNC mbstowcs(wchar_t *dest, const char *src, size_t n)
227 {
228 size_t org_n = n;
229
230 if (unicode_status != UNICODE_ON) {
231 while (n) {
232 unsigned char c = *src++;
233
234 if (dest)
235 *dest++ = c;
236 if (c == 0)
237 break;
238 n--;
239 }
240 return org_n - n;
241 }
242
243 while (n) {
244 wchar_t wc;
245 src = mbstowc_internal(&wc, src);
246 if (wc == ERROR_WCHAR) /* error */
247 return (size_t) -1L;
248 if (dest)
249 *dest++ = wc;
250 if (wc == 0) /* end-of-string */
251 break;
252 n--;
253 }
254
255 return org_n - n;
256 }
257
iswspace(wint_t wc)258 int FAST_FUNC iswspace(wint_t wc)
259 {
260 return (unsigned)wc <= 0x7f && isspace(wc);
261 }
262
iswalnum(wint_t wc)263 int FAST_FUNC iswalnum(wint_t wc)
264 {
265 return (unsigned)wc <= 0x7f && isalnum(wc);
266 }
267
iswpunct(wint_t wc)268 int FAST_FUNC iswpunct(wint_t wc)
269 {
270 return (unsigned)wc <= 0x7f && ispunct(wc);
271 }
272
273
274 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
275 struct interval {
276 uint16_t first;
277 uint16_t last;
278 };
279
280 /* auxiliary function for binary search in interval table */
in_interval_table(unsigned ucs,const struct interval * table,unsigned max)281 static int in_interval_table(unsigned ucs, const struct interval *table, unsigned max)
282 {
283 unsigned min;
284 unsigned mid;
285
286 if (ucs < table[0].first || ucs > table[max].last)
287 return 0;
288
289 min = 0;
290 while (max >= min) {
291 mid = (min + max) / 2;
292 if (ucs > table[mid].last)
293 min = mid + 1;
294 else if (ucs < table[mid].first)
295 max = mid - 1;
296 else
297 return 1;
298 }
299 return 0;
300 }
301
in_uint16_table(unsigned ucs,const uint16_t * table,unsigned max)302 static int in_uint16_table(unsigned ucs, const uint16_t *table, unsigned max)
303 {
304 unsigned min;
305 unsigned mid;
306 unsigned first, last;
307
308 first = table[0] >> 2;
309 if (ucs < first)
310 return 0;
311 last = (table[max] >> 2) + (table[max] & 3);
312 if (ucs > last)
313 return 0;
314
315 min = 0;
316 while (max >= min) {
317 mid = (min + max) / 2;
318 first = table[mid] >> 2;
319 last = first + (table[mid] & 3);
320 if (ucs > last)
321 min = mid + 1;
322 else if (ucs < first)
323 max = mid - 1;
324 else
325 return 1;
326 }
327 return 0;
328 }
329 # endif
330
331
332 /*
333 * This is an implementation of wcwidth() and wcswidth() (defined in
334 * IEEE Std 1002.1-2001) for Unicode.
335 *
336 * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
337 * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
338 *
339 * In fixed-width output devices, Latin characters all occupy a single
340 * "cell" position of equal width, whereas ideographic CJK characters
341 * occupy two such cells. Interoperability between terminal-line
342 * applications and (teletype-style) character terminals using the
343 * UTF-8 encoding requires agreement on which character should advance
344 * the cursor by how many cell positions. No established formal
345 * standards exist at present on which Unicode character shall occupy
346 * how many cell positions on character terminals. These routines are
347 * a first attempt of defining such behavior based on simple rules
348 * applied to data provided by the Unicode Consortium.
349 *
350 * For some graphical characters, the Unicode standard explicitly
351 * defines a character-cell width via the definition of the East Asian
352 * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
353 * In all these cases, there is no ambiguity about which width a
354 * terminal shall use. For characters in the East Asian Ambiguous (A)
355 * class, the width choice depends purely on a preference of backward
356 * compatibility with either historic CJK or Western practice.
357 * Choosing single-width for these characters is easy to justify as
358 * the appropriate long-term solution, as the CJK practice of
359 * displaying these characters as double-width comes from historic
360 * implementation simplicity (8-bit encoded characters were displayed
361 * single-width and 16-bit ones double-width, even for Greek,
362 * Cyrillic, etc.) and not any typographic considerations.
363 *
364 * Much less clear is the choice of width for the Not East Asian
365 * (Neutral) class. Existing practice does not dictate a width for any
366 * of these characters. It would nevertheless make sense
367 * typographically to allocate two character cells to characters such
368 * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
369 * represented adequately with a single-width glyph. The following
370 * routines at present merely assign a single-cell width to all
371 * neutral characters, in the interest of simplicity. This is not
372 * entirely satisfactory and should be reconsidered before
373 * establishing a formal standard in this area. At the moment, the
374 * decision which Not East Asian (Neutral) characters should be
375 * represented by double-width glyphs cannot yet be answered by
376 * applying a simple rule from the Unicode database content. Setting
377 * up a proper standard for the behavior of UTF-8 character terminals
378 * will require a careful analysis not only of each Unicode character,
379 * but also of each presentation form, something the author of these
380 * routines has avoided to do so far.
381 *
382 * http://www.unicode.org/unicode/reports/tr11/
383 *
384 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
385 *
386 * Permission to use, copy, modify, and distribute this software
387 * for any purpose and without fee is hereby granted. The author
388 * disclaims all warranties with regard to this software.
389 *
390 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
391 */
392
393 /* Assigned Unicode character ranges:
394 * Plane Range
395 * 0 0000–FFFF Basic Multilingual Plane
396 * 1 10000–1FFFF Supplementary Multilingual Plane
397 * 2 20000–2FFFF Supplementary Ideographic Plane
398 * 3 30000-3FFFF Tertiary Ideographic Plane (no chars assigned yet)
399 * 4-13 40000–DFFFF currently unassigned
400 * 14 E0000–EFFFF Supplementary Special-purpose Plane
401 * 15 F0000–FFFFF Supplementary Private Use Area-A
402 * 16 100000–10FFFF Supplementary Private Use Area-B
403 *
404 * "Supplementary Special-purpose Plane currently contains non-graphical
405 * characters in two blocks of 128 and 240 characters. The first block
406 * is for language tag characters for use when language cannot be indicated
407 * through other protocols (such as the xml:lang attribute in XML).
408 * The other block contains glyph variation selectors to indicate
409 * an alternate glyph for a character that cannot be determined by context."
410 *
411 * In simpler terms: it is a tool to fix the "Han unification" mess
412 * created by Unicode committee, to select Chinese/Japanese/Korean/Taiwan
413 * version of a character. (They forgot that the whole purpose of the Unicode
414 * was to be able to write all chars in one charset without such tricks).
415 * Until East Asian users say it is actually necessary to support these
416 * code points in console applications like busybox
417 * (i.e. do these chars ever appear in filenames, hostnames, text files
418 * and such?), we are treating these code points as invalid.
419 *
420 * Tertiary Ideographic Plane is also ignored for now,
421 * until Unicode committee assigns something there.
422 */
423 /* The following two functions define the column width of an ISO 10646
424 * character as follows:
425 *
426 * - The null character (U+0000) has a column width of 0.
427 *
428 * - Other C0/C1 control characters and DEL will lead to a return
429 * value of -1.
430 *
431 * - Non-spacing and enclosing combining characters (general
432 * category code Mn or Me in the Unicode database) have a
433 * column width of 0.
434 *
435 * - SOFT HYPHEN (U+00AD) has a column width of 1.
436 *
437 * - Other format characters (general category code Cf in the Unicode
438 * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
439 *
440 * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
441 * have a column width of 0.
442 *
443 * - Spacing characters in the East Asian Wide (W) or East Asian
444 * Full-width (F) category as defined in Unicode Technical
445 * Report #11 have a column width of 2.
446 *
447 * - All remaining characters (including all printable
448 * ISO 8859-1 and WGL4 characters, Unicode control characters,
449 * etc.) have a column width of 1.
450 *
451 * This implementation assumes that wchar_t characters are encoded
452 * in ISO 10646.
453 */
wcwidth(unsigned ucs)454 int FAST_FUNC wcwidth(unsigned ucs)
455 {
456 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
457 /* sorted list of non-overlapping intervals of non-spacing characters */
458 /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
459 # define BIG_(a,b) { a, b },
460 # define PAIR(a,b)
461 # define ARRAY /* PAIR if < 0x4000 and no more than 4 chars big */ \
462 BIG_(0x0300, 0x036F) \
463 PAIR(0x0483, 0x0486) \
464 PAIR(0x0488, 0x0489) \
465 BIG_(0x0591, 0x05BD) \
466 PAIR(0x05BF, 0x05BF) \
467 PAIR(0x05C1, 0x05C2) \
468 PAIR(0x05C4, 0x05C5) \
469 PAIR(0x05C7, 0x05C7) \
470 PAIR(0x0600, 0x0603) \
471 BIG_(0x0610, 0x0615) \
472 BIG_(0x064B, 0x065E) \
473 PAIR(0x0670, 0x0670) \
474 BIG_(0x06D6, 0x06E4) \
475 PAIR(0x06E7, 0x06E8) \
476 PAIR(0x06EA, 0x06ED) \
477 PAIR(0x070F, 0x070F) \
478 PAIR(0x0711, 0x0711) \
479 BIG_(0x0730, 0x074A) \
480 BIG_(0x07A6, 0x07B0) \
481 BIG_(0x07EB, 0x07F3) \
482 PAIR(0x0901, 0x0902) \
483 PAIR(0x093C, 0x093C) \
484 BIG_(0x0941, 0x0948) \
485 PAIR(0x094D, 0x094D) \
486 PAIR(0x0951, 0x0954) \
487 PAIR(0x0962, 0x0963) \
488 PAIR(0x0981, 0x0981) \
489 PAIR(0x09BC, 0x09BC) \
490 PAIR(0x09C1, 0x09C4) \
491 PAIR(0x09CD, 0x09CD) \
492 PAIR(0x09E2, 0x09E3) \
493 PAIR(0x0A01, 0x0A02) \
494 PAIR(0x0A3C, 0x0A3C) \
495 PAIR(0x0A41, 0x0A42) \
496 PAIR(0x0A47, 0x0A48) \
497 PAIR(0x0A4B, 0x0A4D) \
498 PAIR(0x0A70, 0x0A71) \
499 PAIR(0x0A81, 0x0A82) \
500 PAIR(0x0ABC, 0x0ABC) \
501 BIG_(0x0AC1, 0x0AC5) \
502 PAIR(0x0AC7, 0x0AC8) \
503 PAIR(0x0ACD, 0x0ACD) \
504 PAIR(0x0AE2, 0x0AE3) \
505 PAIR(0x0B01, 0x0B01) \
506 PAIR(0x0B3C, 0x0B3C) \
507 PAIR(0x0B3F, 0x0B3F) \
508 PAIR(0x0B41, 0x0B43) \
509 PAIR(0x0B4D, 0x0B4D) \
510 PAIR(0x0B56, 0x0B56) \
511 PAIR(0x0B82, 0x0B82) \
512 PAIR(0x0BC0, 0x0BC0) \
513 PAIR(0x0BCD, 0x0BCD) \
514 PAIR(0x0C3E, 0x0C40) \
515 PAIR(0x0C46, 0x0C48) \
516 PAIR(0x0C4A, 0x0C4D) \
517 PAIR(0x0C55, 0x0C56) \
518 PAIR(0x0CBC, 0x0CBC) \
519 PAIR(0x0CBF, 0x0CBF) \
520 PAIR(0x0CC6, 0x0CC6) \
521 PAIR(0x0CCC, 0x0CCD) \
522 PAIR(0x0CE2, 0x0CE3) \
523 PAIR(0x0D41, 0x0D43) \
524 PAIR(0x0D4D, 0x0D4D) \
525 PAIR(0x0DCA, 0x0DCA) \
526 PAIR(0x0DD2, 0x0DD4) \
527 PAIR(0x0DD6, 0x0DD6) \
528 PAIR(0x0E31, 0x0E31) \
529 BIG_(0x0E34, 0x0E3A) \
530 BIG_(0x0E47, 0x0E4E) \
531 PAIR(0x0EB1, 0x0EB1) \
532 BIG_(0x0EB4, 0x0EB9) \
533 PAIR(0x0EBB, 0x0EBC) \
534 BIG_(0x0EC8, 0x0ECD) \
535 PAIR(0x0F18, 0x0F19) \
536 PAIR(0x0F35, 0x0F35) \
537 PAIR(0x0F37, 0x0F37) \
538 PAIR(0x0F39, 0x0F39) \
539 BIG_(0x0F71, 0x0F7E) \
540 BIG_(0x0F80, 0x0F84) \
541 PAIR(0x0F86, 0x0F87) \
542 PAIR(0x0FC6, 0x0FC6) \
543 BIG_(0x0F90, 0x0F97) \
544 BIG_(0x0F99, 0x0FBC) \
545 PAIR(0x102D, 0x1030) \
546 PAIR(0x1032, 0x1032) \
547 PAIR(0x1036, 0x1037) \
548 PAIR(0x1039, 0x1039) \
549 PAIR(0x1058, 0x1059) \
550 BIG_(0x1160, 0x11FF) \
551 PAIR(0x135F, 0x135F) \
552 PAIR(0x1712, 0x1714) \
553 PAIR(0x1732, 0x1734) \
554 PAIR(0x1752, 0x1753) \
555 PAIR(0x1772, 0x1773) \
556 PAIR(0x17B4, 0x17B5) \
557 BIG_(0x17B7, 0x17BD) \
558 PAIR(0x17C6, 0x17C6) \
559 BIG_(0x17C9, 0x17D3) \
560 PAIR(0x17DD, 0x17DD) \
561 PAIR(0x180B, 0x180D) \
562 PAIR(0x18A9, 0x18A9) \
563 PAIR(0x1920, 0x1922) \
564 PAIR(0x1927, 0x1928) \
565 PAIR(0x1932, 0x1932) \
566 PAIR(0x1939, 0x193B) \
567 PAIR(0x1A17, 0x1A18) \
568 PAIR(0x1B00, 0x1B03) \
569 PAIR(0x1B34, 0x1B34) \
570 BIG_(0x1B36, 0x1B3A) \
571 PAIR(0x1B3C, 0x1B3C) \
572 PAIR(0x1B42, 0x1B42) \
573 BIG_(0x1B6B, 0x1B73) \
574 BIG_(0x1DC0, 0x1DCA) \
575 PAIR(0x1DFE, 0x1DFF) \
576 BIG_(0x200B, 0x200F) \
577 BIG_(0x202A, 0x202E) \
578 PAIR(0x2060, 0x2063) \
579 BIG_(0x206A, 0x206F) \
580 BIG_(0x20D0, 0x20EF) \
581 BIG_(0x302A, 0x302F) \
582 PAIR(0x3099, 0x309A) \
583 /* Too big to be packed in PAIRs: */ \
584 BIG_(0xA806, 0xA806) \
585 BIG_(0xA80B, 0xA80B) \
586 BIG_(0xA825, 0xA826) \
587 BIG_(0xFB1E, 0xFB1E) \
588 BIG_(0xFE00, 0xFE0F) \
589 BIG_(0xFE20, 0xFE23) \
590 BIG_(0xFEFF, 0xFEFF) \
591 BIG_(0xFFF9, 0xFFFB)
592 static const struct interval combining[] ALIGN4 = { ARRAY };
593 # undef BIG_
594 # undef PAIR
595 # define BIG_(a,b)
596 # define PAIR(a,b) (a << 2) | (b-a),
597 static const uint16_t combining1[] ALIGN2 = { ARRAY };
598 # undef BIG_
599 # undef PAIR
600 # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
601 # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
602 struct CHECK { ARRAY };
603 # undef BIG_
604 # undef PAIR
605 # undef ARRAY
606 # endif
607
608 if (ucs == 0)
609 return 0;
610
611 /* Test for 8-bit control characters (00-1f, 80-9f, 7f) */
612 if ((ucs & ~0x80) < 0x20 || ucs == 0x7f)
613 return -1;
614 /* Quick abort if it is an obviously invalid char */
615 if (ucs > CONFIG_LAST_SUPPORTED_WCHAR)
616 return -1;
617
618 /* Optimization: no combining chars below 0x300 */
619 if (CONFIG_LAST_SUPPORTED_WCHAR < 0x300 || ucs < 0x300)
620 return 1;
621
622 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x300
623 /* Binary search in table of non-spacing characters */
624 if (in_interval_table(ucs, combining, ARRAY_SIZE(combining) - 1))
625 return 0;
626 if (in_uint16_table(ucs, combining1, ARRAY_SIZE(combining1) - 1))
627 return 0;
628
629 /* Optimization: all chars below 0x1100 are not double-width */
630 if (CONFIG_LAST_SUPPORTED_WCHAR < 0x1100 || ucs < 0x1100)
631 return 1;
632
633 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x1100
634 /* Invalid code points: */
635 /* High (d800..dbff) and low (dc00..dfff) surrogates (valid only in UTF16) */
636 /* Private Use Area (e000..f8ff) */
637 /* Noncharacters fdd0..fdef */
638 if ((CONFIG_LAST_SUPPORTED_WCHAR >= 0xd800 && ucs >= 0xd800 && ucs <= 0xf8ff)
639 || (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfdd0 && ucs >= 0xfdd0 && ucs <= 0xfdef)
640 ) {
641 return -1;
642 }
643 /* 0xfffe and 0xffff in every plane are invalid */
644 if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xfffe && ((ucs & 0xfffe) == 0xfffe)) {
645 return -1;
646 }
647
648 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x10000
649 if (ucs >= 0x10000) {
650 /* Combining chars in Supplementary Multilingual Plane 0x1xxxx */
651 static const struct interval combining0x10000[] ALIGN4 = {
652 { 0x0A01, 0x0A03 }, { 0x0A05, 0x0A06 }, { 0x0A0C, 0x0A0F },
653 { 0x0A38, 0x0A3A }, { 0x0A3F, 0x0A3F }, { 0xD167, 0xD169 },
654 { 0xD173, 0xD182 }, { 0xD185, 0xD18B }, { 0xD1AA, 0xD1AD },
655 { 0xD242, 0xD244 }
656 };
657 /* Binary search in table of non-spacing characters in Supplementary Multilingual Plane */
658 if (in_interval_table(ucs ^ 0x10000, combining0x10000, ARRAY_SIZE(combining0x10000) - 1))
659 return 0;
660 /* Check a few non-spacing chars in Supplementary Special-purpose Plane 0xExxxx */
661 if (CONFIG_LAST_SUPPORTED_WCHAR >= 0xE0001
662 && ( ucs == 0xE0001
663 || (ucs >= 0xE0020 && ucs <= 0xE007F)
664 || (ucs >= 0xE0100 && ucs <= 0xE01EF)
665 )
666 ) {
667 return 0;
668 }
669 }
670 # endif
671
672 /* If we arrive here, ucs is not a combining or C0/C1 control character.
673 * Check whether it's 1 char or 2-shar wide.
674 */
675 return 1 +
676 ( (/*ucs >= 0x1100 &&*/ ucs <= 0x115f) /* Hangul Jamo init. consonants */
677 || ucs == 0x2329 /* left-pointing angle bracket; also CJK punct. char */
678 || ucs == 0x232a /* right-pointing angle bracket; also CJK punct. char */
679 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x2e80
680 || (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) /* CJK ... Yi */
681 # endif
682 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0xac00
683 || (ucs >= 0xac00 && ucs <= 0xd7a3) /* Hangul Syllables */
684 # endif
685 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0xf900
686 || (ucs >= 0xf900 && ucs <= 0xfaff) /* CJK Compatibility Ideographs */
687 || (ucs >= 0xfe10 && ucs <= 0xfe19) /* Vertical forms */
688 || (ucs >= 0xfe30 && ucs <= 0xfe6f) /* CJK Compatibility Forms */
689 || (ucs >= 0xff00 && ucs <= 0xff60) /* Fullwidth Forms */
690 || (ucs >= 0xffe0 && ucs <= 0xffe6)
691 # endif
692 # if CONFIG_LAST_SUPPORTED_WCHAR >= 0x20000
693 || ((ucs >> 17) == (2 >> 1)) /* 20000..3ffff: Supplementary and Tertiary Ideographic Planes */
694 # endif
695 );
696 # endif /* >= 0x1100 */
697 # endif /* >= 0x300 */
698 }
699
700
701 # if ENABLE_UNICODE_BIDI_SUPPORT
unicode_bidi_isrtl(wint_t wc)702 int FAST_FUNC unicode_bidi_isrtl(wint_t wc)
703 {
704 /* ranges taken from
705 * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt
706 * Bidi_Class=Left_To_Right | Bidi_Class=Arabic_Letter
707 */
708 # define BIG_(a,b) { a, b },
709 # define PAIR(a,b)
710 # define ARRAY \
711 PAIR(0x0590, 0x0590) \
712 PAIR(0x05BE, 0x05BE) \
713 PAIR(0x05C0, 0x05C0) \
714 PAIR(0x05C3, 0x05C3) \
715 PAIR(0x05C6, 0x05C6) \
716 BIG_(0x05C8, 0x05FF) \
717 PAIR(0x0604, 0x0605) \
718 PAIR(0x0608, 0x0608) \
719 PAIR(0x060B, 0x060B) \
720 PAIR(0x060D, 0x060D) \
721 BIG_(0x061B, 0x064A) \
722 PAIR(0x065F, 0x065F) \
723 PAIR(0x066D, 0x066F) \
724 BIG_(0x0671, 0x06D5) \
725 PAIR(0x06E5, 0x06E6) \
726 PAIR(0x06EE, 0x06EF) \
727 BIG_(0x06FA, 0x070E) \
728 PAIR(0x0710, 0x0710) \
729 BIG_(0x0712, 0x072F) \
730 BIG_(0x074B, 0x07A5) \
731 BIG_(0x07B1, 0x07EA) \
732 PAIR(0x07F4, 0x07F5) \
733 BIG_(0x07FA, 0x0815) \
734 PAIR(0x081A, 0x081A) \
735 PAIR(0x0824, 0x0824) \
736 PAIR(0x0828, 0x0828) \
737 BIG_(0x082E, 0x08FF) \
738 PAIR(0x200F, 0x200F) \
739 PAIR(0x202B, 0x202B) \
740 PAIR(0x202E, 0x202E) \
741 BIG_(0xFB1D, 0xFB1D) \
742 BIG_(0xFB1F, 0xFB28) \
743 BIG_(0xFB2A, 0xFD3D) \
744 BIG_(0xFD40, 0xFDCF) \
745 BIG_(0xFDC8, 0xFDCF) \
746 BIG_(0xFDF0, 0xFDFC) \
747 BIG_(0xFDFE, 0xFDFF) \
748 BIG_(0xFE70, 0xFEFE)
749 /* Probably not necessary
750 {0x10800, 0x1091E},
751 {0x10920, 0x10A00},
752 {0x10A04, 0x10A04},
753 {0x10A07, 0x10A0B},
754 {0x10A10, 0x10A37},
755 {0x10A3B, 0x10A3E},
756 {0x10A40, 0x10A7F},
757 {0x10B36, 0x10B38},
758 {0x10B40, 0x10E5F},
759 {0x10E7F, 0x10FFF},
760 {0x1E800, 0x1EFFF}
761 */
762 static const struct interval rtl_b[] ALIGN4 = { ARRAY };
763 # undef BIG_
764 # undef PAIR
765 # define BIG_(a,b)
766 # define PAIR(a,b) (a << 2) | (b-a),
767 static const uint16_t rtl_p[] ALIGN2 = { ARRAY };
768 # undef BIG_
769 # undef PAIR
770 # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
771 # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
772 struct CHECK { ARRAY };
773 # undef BIG_
774 # undef PAIR
775 # undef ARRAY
776
777 if (in_interval_table(wc, rtl_b, ARRAY_SIZE(rtl_b) - 1))
778 return 1;
779 if (in_uint16_table(wc, rtl_p, ARRAY_SIZE(rtl_p) - 1))
780 return 1;
781 return 0;
782 }
783
784 # if ENABLE_UNICODE_NEUTRAL_TABLE
unicode_bidi_is_neutral_wchar(wint_t wc)785 int FAST_FUNC unicode_bidi_is_neutral_wchar(wint_t wc)
786 {
787 /* ranges taken from
788 * http://www.unicode.org/Public/5.2.0/ucd/extracted/DerivedBidiClass.txt
789 * Bidi_Classes: Paragraph_Separator, Segment_Separator,
790 * White_Space, Other_Neutral, European_Number, European_Separator,
791 * European_Terminator, Arabic_Number, Common_Separator
792 */
793 # define BIG_(a,b) { a, b },
794 # define PAIR(a,b)
795 # define ARRAY \
796 BIG_(0x0009, 0x000D) \
797 BIG_(0x001C, 0x0040) \
798 BIG_(0x005B, 0x0060) \
799 PAIR(0x007B, 0x007E) \
800 PAIR(0x0085, 0x0085) \
801 BIG_(0x00A0, 0x00A9) \
802 PAIR(0x00AB, 0x00AC) \
803 BIG_(0x00AE, 0x00B4) \
804 PAIR(0x00B6, 0x00B9) \
805 BIG_(0x00BB, 0x00BF) \
806 PAIR(0x00D7, 0x00D7) \
807 PAIR(0x00F7, 0x00F7) \
808 PAIR(0x02B9, 0x02BA) \
809 BIG_(0x02C2, 0x02CF) \
810 BIG_(0x02D2, 0x02DF) \
811 BIG_(0x02E5, 0x02FF) \
812 PAIR(0x0374, 0x0375) \
813 PAIR(0x037E, 0x037E) \
814 PAIR(0x0384, 0x0385) \
815 PAIR(0x0387, 0x0387) \
816 PAIR(0x03F6, 0x03F6) \
817 PAIR(0x058A, 0x058A) \
818 PAIR(0x0600, 0x0603) \
819 PAIR(0x0606, 0x0607) \
820 PAIR(0x0609, 0x060A) \
821 PAIR(0x060C, 0x060C) \
822 PAIR(0x060E, 0x060F) \
823 BIG_(0x0660, 0x066C) \
824 PAIR(0x06DD, 0x06DD) \
825 PAIR(0x06E9, 0x06E9) \
826 BIG_(0x06F0, 0x06F9) \
827 PAIR(0x07F6, 0x07F9) \
828 PAIR(0x09F2, 0x09F3) \
829 PAIR(0x09FB, 0x09FB) \
830 PAIR(0x0AF1, 0x0AF1) \
831 BIG_(0x0BF3, 0x0BFA) \
832 BIG_(0x0C78, 0x0C7E) \
833 PAIR(0x0CF1, 0x0CF2) \
834 PAIR(0x0E3F, 0x0E3F) \
835 PAIR(0x0F3A, 0x0F3D) \
836 BIG_(0x1390, 0x1400) \
837 PAIR(0x1680, 0x1680) \
838 PAIR(0x169B, 0x169C) \
839 PAIR(0x17DB, 0x17DB) \
840 BIG_(0x17F0, 0x17F9) \
841 BIG_(0x1800, 0x180A) \
842 PAIR(0x180E, 0x180E) \
843 PAIR(0x1940, 0x1940) \
844 PAIR(0x1944, 0x1945) \
845 BIG_(0x19DE, 0x19FF) \
846 PAIR(0x1FBD, 0x1FBD) \
847 PAIR(0x1FBF, 0x1FC1) \
848 PAIR(0x1FCD, 0x1FCF) \
849 PAIR(0x1FDD, 0x1FDF) \
850 PAIR(0x1FED, 0x1FEF) \
851 PAIR(0x1FFD, 0x1FFE) \
852 BIG_(0x2000, 0x200A) \
853 BIG_(0x2010, 0x2029) \
854 BIG_(0x202F, 0x205F) \
855 PAIR(0x2070, 0x2070) \
856 BIG_(0x2074, 0x207E) \
857 BIG_(0x2080, 0x208E) \
858 BIG_(0x20A0, 0x20B8) \
859 PAIR(0x2100, 0x2101) \
860 PAIR(0x2103, 0x2106) \
861 PAIR(0x2108, 0x2109) \
862 PAIR(0x2114, 0x2114) \
863 PAIR(0x2116, 0x2118) \
864 BIG_(0x211E, 0x2123) \
865 PAIR(0x2125, 0x2125) \
866 PAIR(0x2127, 0x2127) \
867 PAIR(0x2129, 0x2129) \
868 PAIR(0x212E, 0x212E) \
869 PAIR(0x213A, 0x213B) \
870 BIG_(0x2140, 0x2144) \
871 PAIR(0x214A, 0x214D) \
872 BIG_(0x2150, 0x215F) \
873 PAIR(0x2189, 0x2189) \
874 BIG_(0x2190, 0x2335) \
875 BIG_(0x237B, 0x2394) \
876 BIG_(0x2396, 0x23E8) \
877 BIG_(0x2400, 0x2426) \
878 BIG_(0x2440, 0x244A) \
879 BIG_(0x2460, 0x249B) \
880 BIG_(0x24EA, 0x26AB) \
881 BIG_(0x26AD, 0x26CD) \
882 BIG_(0x26CF, 0x26E1) \
883 PAIR(0x26E3, 0x26E3) \
884 BIG_(0x26E8, 0x26FF) \
885 PAIR(0x2701, 0x2704) \
886 PAIR(0x2706, 0x2709) \
887 BIG_(0x270C, 0x2727) \
888 BIG_(0x2729, 0x274B) \
889 PAIR(0x274D, 0x274D) \
890 PAIR(0x274F, 0x2752) \
891 BIG_(0x2756, 0x275E) \
892 BIG_(0x2761, 0x2794) \
893 BIG_(0x2798, 0x27AF) \
894 BIG_(0x27B1, 0x27BE) \
895 BIG_(0x27C0, 0x27CA) \
896 PAIR(0x27CC, 0x27CC) \
897 BIG_(0x27D0, 0x27FF) \
898 BIG_(0x2900, 0x2B4C) \
899 BIG_(0x2B50, 0x2B59) \
900 BIG_(0x2CE5, 0x2CEA) \
901 BIG_(0x2CF9, 0x2CFF) \
902 BIG_(0x2E00, 0x2E99) \
903 BIG_(0x2E9B, 0x2EF3) \
904 BIG_(0x2F00, 0x2FD5) \
905 BIG_(0x2FF0, 0x2FFB) \
906 BIG_(0x3000, 0x3004) \
907 BIG_(0x3008, 0x3020) \
908 PAIR(0x3030, 0x3030) \
909 PAIR(0x3036, 0x3037) \
910 PAIR(0x303D, 0x303D) \
911 PAIR(0x303E, 0x303F) \
912 PAIR(0x309B, 0x309C) \
913 PAIR(0x30A0, 0x30A0) \
914 PAIR(0x30FB, 0x30FB) \
915 BIG_(0x31C0, 0x31E3) \
916 PAIR(0x321D, 0x321E) \
917 BIG_(0x3250, 0x325F) \
918 PAIR(0x327C, 0x327E) \
919 BIG_(0x32B1, 0x32BF) \
920 PAIR(0x32CC, 0x32CF) \
921 PAIR(0x3377, 0x337A) \
922 PAIR(0x33DE, 0x33DF) \
923 PAIR(0x33FF, 0x33FF) \
924 BIG_(0x4DC0, 0x4DFF) \
925 BIG_(0xA490, 0xA4C6) \
926 BIG_(0xA60D, 0xA60F) \
927 BIG_(0xA673, 0xA673) \
928 BIG_(0xA67E, 0xA67F) \
929 BIG_(0xA700, 0xA721) \
930 BIG_(0xA788, 0xA788) \
931 BIG_(0xA828, 0xA82B) \
932 BIG_(0xA838, 0xA839) \
933 BIG_(0xA874, 0xA877) \
934 BIG_(0xFB29, 0xFB29) \
935 BIG_(0xFD3E, 0xFD3F) \
936 BIG_(0xFDFD, 0xFDFD) \
937 BIG_(0xFE10, 0xFE19) \
938 BIG_(0xFE30, 0xFE52) \
939 BIG_(0xFE54, 0xFE66) \
940 BIG_(0xFE68, 0xFE6B) \
941 BIG_(0xFF01, 0xFF20) \
942 BIG_(0xFF3B, 0xFF40) \
943 BIG_(0xFF5B, 0xFF65) \
944 BIG_(0xFFE0, 0xFFE6) \
945 BIG_(0xFFE8, 0xFFEE) \
946 BIG_(0xFFF9, 0xFFFD)
947 /*
948 {0x10101, 0x10101},
949 {0x10140, 0x1019B},
950 {0x1091F, 0x1091F},
951 {0x10B39, 0x10B3F},
952 {0x10E60, 0x10E7E},
953 {0x1D200, 0x1D241},
954 {0x1D245, 0x1D245},
955 {0x1D300, 0x1D356},
956 {0x1D6DB, 0x1D6DB},
957 {0x1D715, 0x1D715},
958 {0x1D74F, 0x1D74F},
959 {0x1D789, 0x1D789},
960 {0x1D7C3, 0x1D7C3},
961 {0x1D7CE, 0x1D7FF},
962 {0x1F000, 0x1F02B},
963 {0x1F030, 0x1F093},
964 {0x1F100, 0x1F10A}
965 */
966 static const struct interval neutral_b[] ALIGN4 = { ARRAY };
967 # undef BIG_
968 # undef PAIR
969 # define BIG_(a,b)
970 # define PAIR(a,b) (a << 2) | (b-a),
971 static const uint16_t neutral_p[] ALIGN2 = { ARRAY };
972 # undef BIG_
973 # undef PAIR
974 # define BIG_(a,b) char big_##a[b < 0x4000 && b-a <= 3 ? -1 : 1];
975 # define PAIR(a,b) char pair##a[b >= 0x4000 || b-a > 3 ? -1 : 1];
976 struct CHECK { ARRAY };
977 # undef BIG_
978 # undef PAIR
979 # undef ARRAY
980
981 if (in_interval_table(wc, neutral_b, ARRAY_SIZE(neutral_b) - 1))
982 return 1;
983 if (in_uint16_table(wc, neutral_p, ARRAY_SIZE(neutral_p) - 1))
984 return 1;
985 return 0;
986 }
987 # endif
988
989 # endif /* UNICODE_BIDI_SUPPORT */
990
991 #endif /* Homegrown Unicode support */
992
993
994 /* The rest is mostly same for libc and for "homegrown" support */
995
unicode_strlen(const char * string)996 size_t FAST_FUNC unicode_strlen(const char *string)
997 {
998 size_t width = mbstowcs(NULL, string, INT_MAX);
999 if (width == (size_t)-1L)
1000 return strlen(string);
1001 return width;
1002 }
1003
unicode_strwidth(const char * string)1004 size_t FAST_FUNC unicode_strwidth(const char *string)
1005 {
1006 uni_stat_t uni_stat;
1007 printable_string2(&uni_stat, string);
1008 return uni_stat.unicode_width;
1009 }
1010
unicode_conv_to_printable2(uni_stat_t * stats,const char * src,unsigned width,int flags)1011 static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags)
1012 {
1013 char *dst;
1014 unsigned dst_len;
1015 unsigned uni_count;
1016 unsigned uni_width;
1017
1018 if (unicode_status != UNICODE_ON) {
1019 char *d;
1020 if (flags & UNI_FLAG_PAD) {
1021 d = dst = xmalloc(width + 1);
1022 while ((int)--width >= 0) {
1023 unsigned char c = *src;
1024 if (c == '\0') {
1025 do
1026 *d++ = ' ';
1027 while ((int)--width >= 0);
1028 break;
1029 }
1030 *d++ = (c >= ' ' && c < 0x7f) ? c : '?';
1031 src++;
1032 }
1033 *d = '\0';
1034 } else {
1035 d = dst = xstrndup(src, width);
1036 while (*d) {
1037 unsigned char c = *d;
1038 if (c < ' ' || c >= 0x7f)
1039 *d = '?';
1040 d++;
1041 }
1042 }
1043 if (stats) {
1044 stats->byte_count = (d - dst);
1045 stats->unicode_count = (d - dst);
1046 stats->unicode_width = (d - dst);
1047 }
1048 return dst;
1049 }
1050
1051 dst = NULL;
1052 uni_count = uni_width = 0;
1053 dst_len = 0;
1054 while (1) {
1055 int w;
1056 wchar_t wc;
1057
1058 #if ENABLE_UNICODE_USING_LOCALE
1059 {
1060 mbstate_t mbst = { 0 };
1061 ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
1062 /* If invalid sequence is seen: -1 is returned,
1063 * src points to the invalid sequence, errno = EILSEQ.
1064 * Else number of wchars (excluding terminating L'\0')
1065 * written to dest is returned.
1066 * If len (here: 1) non-L'\0' wchars stored at dest,
1067 * src points to the next char to be converted.
1068 * If string is completely converted: src = NULL.
1069 */
1070 if (rc == 0) /* end-of-string */
1071 break;
1072 if (rc < 0) { /* error */
1073 src++;
1074 goto subst;
1075 }
1076 if (!iswprint(wc))
1077 goto subst;
1078 }
1079 #else
1080 src = mbstowc_internal(&wc, src);
1081 /* src is advanced to next mb char
1082 * wc == ERROR_WCHAR: invalid sequence is seen
1083 * else: wc is set
1084 */
1085 if (wc == ERROR_WCHAR) /* error */
1086 goto subst;
1087 if (wc == 0) /* end-of-string */
1088 break;
1089 #endif
1090 if (CONFIG_LAST_SUPPORTED_WCHAR && wc > CONFIG_LAST_SUPPORTED_WCHAR)
1091 goto subst;
1092 w = wcwidth(wc);
1093 if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0) /* non-printable wchar */
1094 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
1095 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
1096 ) {
1097 subst:
1098 wc = CONFIG_SUBST_WCHAR;
1099 w = 1;
1100 }
1101 width -= w;
1102 /* Note: if width == 0, we still may add more chars,
1103 * they may be zero-width or combining ones */
1104 if ((int)width < 0) {
1105 /* can't add this wc, string would become longer than width */
1106 width += w;
1107 break;
1108 }
1109
1110 uni_count++;
1111 uni_width += w;
1112 dst = xrealloc(dst, dst_len + MB_CUR_MAX);
1113 #if ENABLE_UNICODE_USING_LOCALE
1114 {
1115 mbstate_t mbst = { 0 };
1116 dst_len += wcrtomb(&dst[dst_len], wc, &mbst);
1117 }
1118 #else
1119 dst_len += wcrtomb_internal(&dst[dst_len], wc);
1120 #endif
1121 }
1122
1123 /* Pad to remaining width */
1124 if (flags & UNI_FLAG_PAD) {
1125 dst = xrealloc(dst, dst_len + width + 1);
1126 uni_count += width;
1127 uni_width += width;
1128 while ((int)--width >= 0) {
1129 dst[dst_len++] = ' ';
1130 }
1131 }
1132 if (!dst) /* for example, if input was "" */
1133 dst = xzalloc(1);
1134 dst[dst_len] = '\0';
1135 if (stats) {
1136 stats->byte_count = dst_len;
1137 stats->unicode_count = uni_count;
1138 stats->unicode_width = uni_width;
1139 }
1140
1141 return dst;
1142 }
unicode_conv_to_printable(uni_stat_t * stats,const char * src)1143 char* FAST_FUNC unicode_conv_to_printable(uni_stat_t *stats, const char *src)
1144 {
1145 return unicode_conv_to_printable2(stats, src, INT_MAX, 0);
1146 }
unicode_conv_to_printable_fixedwidth(const char * src,unsigned width)1147 char* FAST_FUNC unicode_conv_to_printable_fixedwidth(/*uni_stat_t *stats,*/ const char *src, unsigned width)
1148 {
1149 return unicode_conv_to_printable2(/*stats:*/ NULL, src, width, UNI_FLAG_PAD);
1150 }
1151
1152 #ifdef UNUSED
unicode_conv_to_printable_maxwidth(uni_stat_t * stats,const char * src,unsigned maxwidth)1153 char* FAST_FUNC unicode_conv_to_printable_maxwidth(uni_stat_t *stats, const char *src, unsigned maxwidth)
1154 {
1155 return unicode_conv_to_printable2(stats, src, maxwidth, 0);
1156 }
1157
unicode_padding_to_width(unsigned width,const char * src)1158 unsigned FAST_FUNC unicode_padding_to_width(unsigned width, const char *src)
1159 {
1160 if (unicode_status != UNICODE_ON) {
1161 return width - strnlen(src, width);
1162 }
1163
1164 while (1) {
1165 int w;
1166 wchar_t wc;
1167
1168 #if ENABLE_UNICODE_USING_LOCALE
1169 {
1170 mbstate_t mbst = { 0 };
1171 ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
1172 if (rc <= 0) /* error, or end-of-string */
1173 return width;
1174 }
1175 #else
1176 src = mbstowc_internal(&wc, src);
1177 if (wc == ERROR_WCHAR || wc == 0) /* error, or end-of-string */
1178 return width;
1179 #endif
1180 w = wcwidth(wc);
1181 if (w < 0) /* non-printable wchar */
1182 return width;
1183 width -= w;
1184 if ((int)width <= 0) /* string is longer than width */
1185 return 0;
1186 }
1187 }
1188 #endif
1189