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1 office 1 /* guniprop.c - Unicode character properties.
2 *
3 * Copyright (C) 1999 Tom Tromey
4 * Copyright (C) 2000 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19  
20 #include "config.h"
21  
22 #include <stdlib.h>
23 #include <stddef.h>
24 #include <string.h>
25 #include <locale.h>
26  
27 #include "gmem.h"
28 #include "gstring.h"
29 #include "gtestutils.h"
30 #include "gtypes.h"
31 #include "gunicode.h"
32 #include "gunichartables.h"
33 #include "gmirroringtable.h"
34 #include "gscripttable.h"
35 #include "gunicodeprivate.h"
36 #ifdef G_OS_WIN32
37 #include "gwin32.h"
38 #endif
39  
40 #define ATTR_TABLE(Page) (((Page) <= G_UNICODE_LAST_PAGE_PART1) \
41 ? attr_table_part1[Page] \
42 : attr_table_part2[(Page) - 0xe00])
43  
44 #define ATTTABLE(Page, Char) \
45 ((ATTR_TABLE(Page) == G_UNICODE_MAX_TABLE_INDEX) ? 0 : (attr_data[ATTR_TABLE(Page)][Char]))
46  
47 #define TTYPE_PART1(Page, Char) \
48 ((type_table_part1[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
49 ? (type_table_part1[Page] - G_UNICODE_MAX_TABLE_INDEX) \
50 : (type_data[type_table_part1[Page]][Char]))
51  
52 #define TTYPE_PART2(Page, Char) \
53 ((type_table_part2[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
54 ? (type_table_part2[Page] - G_UNICODE_MAX_TABLE_INDEX) \
55 : (type_data[type_table_part2[Page]][Char]))
56  
57 #define TYPE(Char) \
58 (((Char) <= G_UNICODE_LAST_CHAR_PART1) \
59 ? TTYPE_PART1 ((Char) >> 8, (Char) & 0xff) \
60 : (((Char) >= 0xe0000 && (Char) <= G_UNICODE_LAST_CHAR) \
61 ? TTYPE_PART2 (((Char) - 0xe0000) >> 8, (Char) & 0xff) \
62 : G_UNICODE_UNASSIGNED))
63  
64  
65 #define IS(Type, Class) (((guint)1 << (Type)) & (Class))
66 #define OR(Type, Rest) (((guint)1 << (Type)) | (Rest))
67  
68  
69  
70 #define ISALPHA(Type) IS ((Type), \
71 OR (G_UNICODE_LOWERCASE_LETTER, \
72 OR (G_UNICODE_UPPERCASE_LETTER, \
73 OR (G_UNICODE_TITLECASE_LETTER, \
74 OR (G_UNICODE_MODIFIER_LETTER, \
75 OR (G_UNICODE_OTHER_LETTER, 0))))))
76  
77 #define ISALDIGIT(Type) IS ((Type), \
78 OR (G_UNICODE_DECIMAL_NUMBER, \
79 OR (G_UNICODE_LETTER_NUMBER, \
80 OR (G_UNICODE_OTHER_NUMBER, \
81 OR (G_UNICODE_LOWERCASE_LETTER, \
82 OR (G_UNICODE_UPPERCASE_LETTER, \
83 OR (G_UNICODE_TITLECASE_LETTER, \
84 OR (G_UNICODE_MODIFIER_LETTER, \
85 OR (G_UNICODE_OTHER_LETTER, 0)))))))))
86  
87 #define ISMARK(Type) IS ((Type), \
88 OR (G_UNICODE_NON_SPACING_MARK, \
89 OR (G_UNICODE_SPACING_MARK, \
90 OR (G_UNICODE_ENCLOSING_MARK, 0))))
91  
92 #define ISZEROWIDTHTYPE(Type) IS ((Type), \
93 OR (G_UNICODE_NON_SPACING_MARK, \
94 OR (G_UNICODE_ENCLOSING_MARK, \
95 OR (G_UNICODE_FORMAT, 0))))
96  
97 /**
98 * g_unichar_isalnum:
99 * @c: a Unicode character
100 *
101 * Determines whether a character is alphanumeric.
102 * Given some UTF-8 text, obtain a character value
103 * with g_utf8_get_char().
104 *
105 * Returns: %TRUE if @c is an alphanumeric character
106 **/
107 gboolean
108 g_unichar_isalnum (gunichar c)
109 {
110 return ISALDIGIT (TYPE (c)) ? TRUE : FALSE;
111 }
112  
113 /**
114 * g_unichar_isalpha:
115 * @c: a Unicode character
116 *
117 * Determines whether a character is alphabetic (i.e. a letter).
118 * Given some UTF-8 text, obtain a character value with
119 * g_utf8_get_char().
120 *
121 * Returns: %TRUE if @c is an alphabetic character
122 **/
123 gboolean
124 g_unichar_isalpha (gunichar c)
125 {
126 return ISALPHA (TYPE (c)) ? TRUE : FALSE;
127 }
128  
129  
130 /**
131 * g_unichar_iscntrl:
132 * @c: a Unicode character
133 *
134 * Determines whether a character is a control character.
135 * Given some UTF-8 text, obtain a character value with
136 * g_utf8_get_char().
137 *
138 * Returns: %TRUE if @c is a control character
139 **/
140 gboolean
141 g_unichar_iscntrl (gunichar c)
142 {
143 return TYPE (c) == G_UNICODE_CONTROL;
144 }
145  
146 /**
147 * g_unichar_isdigit:
148 * @c: a Unicode character
149 *
150 * Determines whether a character is numeric (i.e. a digit). This
151 * covers ASCII 0-9 and also digits in other languages/scripts. Given
152 * some UTF-8 text, obtain a character value with g_utf8_get_char().
153 *
154 * Returns: %TRUE if @c is a digit
155 **/
156 gboolean
157 g_unichar_isdigit (gunichar c)
158 {
159 return TYPE (c) == G_UNICODE_DECIMAL_NUMBER;
160 }
161  
162  
163 /**
164 * g_unichar_isgraph:
165 * @c: a Unicode character
166 *
167 * Determines whether a character is printable and not a space
168 * (returns %FALSE for control characters, format characters, and
169 * spaces). g_unichar_isprint() is similar, but returns %TRUE for
170 * spaces. Given some UTF-8 text, obtain a character value with
171 * g_utf8_get_char().
172 *
173 * Returns: %TRUE if @c is printable unless it's a space
174 **/
175 gboolean
176 g_unichar_isgraph (gunichar c)
177 {
178 return !IS (TYPE(c),
179 OR (G_UNICODE_CONTROL,
180 OR (G_UNICODE_FORMAT,
181 OR (G_UNICODE_UNASSIGNED,
182 OR (G_UNICODE_SURROGATE,
183 OR (G_UNICODE_SPACE_SEPARATOR,
184 0))))));
185 }
186  
187 /**
188 * g_unichar_islower:
189 * @c: a Unicode character
190 *
191 * Determines whether a character is a lowercase letter.
192 * Given some UTF-8 text, obtain a character value with
193 * g_utf8_get_char().
194 *
195 * Returns: %TRUE if @c is a lowercase letter
196 **/
197 gboolean
198 g_unichar_islower (gunichar c)
199 {
200 return TYPE (c) == G_UNICODE_LOWERCASE_LETTER;
201 }
202  
203  
204 /**
205 * g_unichar_isprint:
206 * @c: a Unicode character
207 *
208 * Determines whether a character is printable.
209 * Unlike g_unichar_isgraph(), returns %TRUE for spaces.
210 * Given some UTF-8 text, obtain a character value with
211 * g_utf8_get_char().
212 *
213 * Returns: %TRUE if @c is printable
214 **/
215 gboolean
216 g_unichar_isprint (gunichar c)
217 {
218 return !IS (TYPE(c),
219 OR (G_UNICODE_CONTROL,
220 OR (G_UNICODE_FORMAT,
221 OR (G_UNICODE_UNASSIGNED,
222 OR (G_UNICODE_SURROGATE,
223 0)))));
224 }
225  
226 /**
227 * g_unichar_ispunct:
228 * @c: a Unicode character
229 *
230 * Determines whether a character is punctuation or a symbol.
231 * Given some UTF-8 text, obtain a character value with
232 * g_utf8_get_char().
233 *
234 * Returns: %TRUE if @c is a punctuation or symbol character
235 **/
236 gboolean
237 g_unichar_ispunct (gunichar c)
238 {
239 return IS (TYPE(c),
240 OR (G_UNICODE_CONNECT_PUNCTUATION,
241 OR (G_UNICODE_DASH_PUNCTUATION,
242 OR (G_UNICODE_CLOSE_PUNCTUATION,
243 OR (G_UNICODE_FINAL_PUNCTUATION,
244 OR (G_UNICODE_INITIAL_PUNCTUATION,
245 OR (G_UNICODE_OTHER_PUNCTUATION,
246 OR (G_UNICODE_OPEN_PUNCTUATION,
247 OR (G_UNICODE_CURRENCY_SYMBOL,
248 OR (G_UNICODE_MODIFIER_SYMBOL,
249 OR (G_UNICODE_MATH_SYMBOL,
250 OR (G_UNICODE_OTHER_SYMBOL,
251 0)))))))))))) ? TRUE : FALSE;
252 }
253  
254 /**
255 * g_unichar_isspace:
256 * @c: a Unicode character
257 *
258 * Determines whether a character is a space, tab, or line separator
259 * (newline, carriage return, etc.). Given some UTF-8 text, obtain a
260 * character value with g_utf8_get_char().
261 *
262 * (Note: don't use this to do word breaking; you have to use
263 * Pango or equivalent to get word breaking right, the algorithm
264 * is fairly complex.)
265 *
266 * Returns: %TRUE if @c is a space character
267 **/
268 gboolean
269 g_unichar_isspace (gunichar c)
270 {
271 switch (c)
272 {
273 /* special-case these since Unicode thinks they are not spaces */
274 case '\t':
275 case '\n':
276 case '\r':
277 case '\f':
278 return TRUE;
279 break;
280  
281 default:
282 {
283 return IS (TYPE(c),
284 OR (G_UNICODE_SPACE_SEPARATOR,
285 OR (G_UNICODE_LINE_SEPARATOR,
286 OR (G_UNICODE_PARAGRAPH_SEPARATOR,
287 0)))) ? TRUE : FALSE;
288 }
289 break;
290 }
291 }
292  
293 /**
294 * g_unichar_ismark:
295 * @c: a Unicode character
296 *
297 * Determines whether a character is a mark (non-spacing mark,
298 * combining mark, or enclosing mark in Unicode speak).
299 * Given some UTF-8 text, obtain a character value
300 * with g_utf8_get_char().
301 *
302 * Note: in most cases where isalpha characters are allowed,
303 * ismark characters should be allowed to as they are essential
304 * for writing most European languages as well as many non-Latin
305 * scripts.
306 *
307 * Returns: %TRUE if @c is a mark character
308 *
309 * Since: 2.14
310 **/
311 gboolean
312 g_unichar_ismark (gunichar c)
313 {
314 return ISMARK (TYPE (c));
315 }
316  
317 /**
318 * g_unichar_isupper:
319 * @c: a Unicode character
320 *
321 * Determines if a character is uppercase.
322 *
323 * Returns: %TRUE if @c is an uppercase character
324 **/
325 gboolean
326 g_unichar_isupper (gunichar c)
327 {
328 return TYPE (c) == G_UNICODE_UPPERCASE_LETTER;
329 }
330  
331 /**
332 * g_unichar_istitle:
333 * @c: a Unicode character
334 *
335 * Determines if a character is titlecase. Some characters in
336 * Unicode which are composites, such as the DZ digraph
337 * have three case variants instead of just two. The titlecase
338 * form is used at the beginning of a word where only the
339 * first letter is capitalized. The titlecase form of the DZ
340 * digraph is U+01F2 LATIN CAPITAL LETTTER D WITH SMALL LETTER Z.
341 *
342 * Returns: %TRUE if the character is titlecase
343 **/
344 gboolean
345 g_unichar_istitle (gunichar c)
346 {
347 unsigned int i;
348 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
349 if (title_table[i][0] == c)
350 return TRUE;
351 return FALSE;
352 }
353  
354 /**
355 * g_unichar_isxdigit:
356 * @c: a Unicode character.
357 *
358 * Determines if a character is a hexidecimal digit.
359 *
360 * Returns: %TRUE if the character is a hexadecimal digit
361 **/
362 gboolean
363 g_unichar_isxdigit (gunichar c)
364 {
365 return ((c >= 'a' && c <= 'f')
366 || (c >= 'A' && c <= 'F')
367 || (TYPE (c) == G_UNICODE_DECIMAL_NUMBER));
368 }
369  
370 /**
371 * g_unichar_isdefined:
372 * @c: a Unicode character
373 *
374 * Determines if a given character is assigned in the Unicode
375 * standard.
376 *
377 * Returns: %TRUE if the character has an assigned value
378 **/
379 gboolean
380 g_unichar_isdefined (gunichar c)
381 {
382 return !IS (TYPE(c),
383 OR (G_UNICODE_UNASSIGNED,
384 OR (G_UNICODE_SURROGATE,
385 0)));
386 }
387  
388 /**
389 * g_unichar_iszerowidth:
390 * @c: a Unicode character
391 *
392 * Determines if a given character typically takes zero width when rendered.
393 * The return value is %TRUE for all non-spacing and enclosing marks
394 * (e.g., combining accents), format characters, zero-width
395 * space, but not U+00AD SOFT HYPHEN.
396 *
397 * A typical use of this function is with one of g_unichar_iswide() or
398 * g_unichar_iswide_cjk() to determine the number of cells a string occupies
399 * when displayed on a grid display (terminals). However, note that not all
400 * terminals support zero-width rendering of zero-width marks.
401 *
402 * Returns: %TRUE if the character has zero width
403 *
404 * Since: 2.14
405 **/
406 gboolean
407 g_unichar_iszerowidth (gunichar c)
408 {
409 if (G_UNLIKELY (c == 0x00AD))
410 return FALSE;
411  
412 if (G_UNLIKELY (ISZEROWIDTHTYPE (TYPE (c))))
413 return TRUE;
414  
415 if (G_UNLIKELY ((c >= 0x1160 && c < 0x1200) ||
416 c == 0x200B))
417 return TRUE;
418  
419 return FALSE;
420 }
421  
422 static int
423 interval_compare (const void *key, const void *elt)
424 {
425 gunichar c = GPOINTER_TO_UINT (key);
426 struct Interval *interval = (struct Interval *)elt;
427  
428 if (c < interval->start)
429 return -1;
430 if (c > interval->end)
431 return +1;
432  
433 return 0;
434 }
435  
436 #define G_WIDTH_TABLE_MIDPOINT (G_N_ELEMENTS (g_unicode_width_table_wide) / 2)
437  
438 static inline gboolean
439 g_unichar_iswide_bsearch (gunichar ch)
440 {
441 int lower = 0;
442 int upper = G_N_ELEMENTS (g_unicode_width_table_wide) + 1;
443 static int saved_mid = G_WIDTH_TABLE_MIDPOINT;
444 int mid = saved_mid;
445  
446 do
447 {
448 if (ch < g_unicode_width_table_wide[mid].start)
449 upper = mid - 1;
450 else if (ch > g_unicode_width_table_wide[mid].end)
451 lower = mid + 1;
452 else
453 return TRUE;
454  
455 mid = (lower + upper) / 2;
456 }
457 while (lower <= upper);
458  
459 return FALSE;
460 }
461  
462 /**
463 * g_unichar_iswide:
464 * @c: a Unicode character
465 *
466 * Determines if a character is typically rendered in a double-width
467 * cell.
468 *
469 * Returns: %TRUE if the character is wide
470 **/
471 gboolean
472 g_unichar_iswide (gunichar c)
473 {
474 if (c < g_unicode_width_table_wide[0].start)
475 return FALSE;
476 else
477 return g_unichar_iswide_bsearch (c);
478 }
479  
480  
481 /**
482 * g_unichar_iswide_cjk:
483 * @c: a Unicode character
484 *
485 * Determines if a character is typically rendered in a double-width
486 * cell under legacy East Asian locales. If a character is wide according to
487 * g_unichar_iswide(), then it is also reported wide with this function, but
488 * the converse is not necessarily true. See the
489 * [Unicode Standard Annex #11](http://www.unicode.org/reports/tr11/)
490 * for details.
491 *
492 * If a character passes the g_unichar_iswide() test then it will also pass
493 * this test, but not the other way around. Note that some characters may
494 * pass both this test and g_unichar_iszerowidth().
495 *
496 * Returns: %TRUE if the character is wide in legacy East Asian locales
497 *
498 * Since: 2.12
499 */
500 gboolean
501 g_unichar_iswide_cjk (gunichar c)
502 {
503 if (g_unichar_iswide (c))
504 return TRUE;
505  
506 if (bsearch (GUINT_TO_POINTER (c),
507 g_unicode_width_table_ambiguous,
508 G_N_ELEMENTS (g_unicode_width_table_ambiguous),
509 sizeof g_unicode_width_table_ambiguous[0],
510 interval_compare))
511 return TRUE;
512  
513 return FALSE;
514 }
515  
516  
517 /**
518 * g_unichar_toupper:
519 * @c: a Unicode character
520 *
521 * Converts a character to uppercase.
522 *
523 * Returns: the result of converting @c to uppercase.
524 * If @c is not an lowercase or titlecase character,
525 * or has no upper case equivalent @c is returned unchanged.
526 **/
527 gunichar
528 g_unichar_toupper (gunichar c)
529 {
530 int t = TYPE (c);
531 if (t == G_UNICODE_LOWERCASE_LETTER)
532 {
533 gunichar val = ATTTABLE (c >> 8, c & 0xff);
534 if (val >= 0x1000000)
535 {
536 const gchar *p = special_case_table + val - 0x1000000;
537 val = g_utf8_get_char (p);
538 }
539 /* Some lowercase letters, e.g., U+000AA, FEMININE ORDINAL INDICATOR,
540 * do not have an uppercase equivalent, in which case val will be
541 * zero.
542 */
543 return val ? val : c;
544 }
545 else if (t == G_UNICODE_TITLECASE_LETTER)
546 {
547 unsigned int i;
548 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
549 {
550 if (title_table[i][0] == c)
551 return title_table[i][1] ? title_table[i][1] : c;
552 }
553 }
554 return c;
555 }
556  
557 /**
558 * g_unichar_tolower:
559 * @c: a Unicode character.
560 *
561 * Converts a character to lower case.
562 *
563 * Returns: the result of converting @c to lower case.
564 * If @c is not an upperlower or titlecase character,
565 * or has no lowercase equivalent @c is returned unchanged.
566 **/
567 gunichar
568 g_unichar_tolower (gunichar c)
569 {
570 int t = TYPE (c);
571 if (t == G_UNICODE_UPPERCASE_LETTER)
572 {
573 gunichar val = ATTTABLE (c >> 8, c & 0xff);
574 if (val >= 0x1000000)
575 {
576 const gchar *p = special_case_table + val - 0x1000000;
577 return g_utf8_get_char (p);
578 }
579 else
580 {
581 /* Not all uppercase letters are guaranteed to have a lowercase
582 * equivalent. If this is the case, val will be zero. */
583 return val ? val : c;
584 }
585 }
586 else if (t == G_UNICODE_TITLECASE_LETTER)
587 {
588 unsigned int i;
589 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
590 {
591 if (title_table[i][0] == c)
592 return title_table[i][2];
593 }
594 }
595 return c;
596 }
597  
598 /**
599 * g_unichar_totitle:
600 * @c: a Unicode character
601 *
602 * Converts a character to the titlecase.
603 *
604 * Returns: the result of converting @c to titlecase.
605 * If @c is not an uppercase or lowercase character,
606 * @c is returned unchanged.
607 **/
608 gunichar
609 g_unichar_totitle (gunichar c)
610 {
611 unsigned int i;
612 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
613 {
614 if (title_table[i][0] == c || title_table[i][1] == c
615 || title_table[i][2] == c)
616 return title_table[i][0];
617 }
618  
619 if (TYPE (c) == G_UNICODE_LOWERCASE_LETTER)
620 return g_unichar_toupper (c);
621  
622 return c;
623 }
624  
625 /**
626 * g_unichar_digit_value:
627 * @c: a Unicode character
628 *
629 * Determines the numeric value of a character as a decimal
630 * digit.
631 *
632 * Returns: If @c is a decimal digit (according to
633 * g_unichar_isdigit()), its numeric value. Otherwise, -1.
634 **/
635 int
636 g_unichar_digit_value (gunichar c)
637 {
638 if (TYPE (c) == G_UNICODE_DECIMAL_NUMBER)
639 return ATTTABLE (c >> 8, c & 0xff);
640 return -1;
641 }
642  
643 /**
644 * g_unichar_xdigit_value:
645 * @c: a Unicode character
646 *
647 * Determines the numeric value of a character as a hexidecimal
648 * digit.
649 *
650 * Returns: If @c is a hex digit (according to
651 * g_unichar_isxdigit()), its numeric value. Otherwise, -1.
652 **/
653 int
654 g_unichar_xdigit_value (gunichar c)
655 {
656 if (c >= 'A' && c <= 'F')
657 return c - 'A' + 10;
658 if (c >= 'a' && c <= 'f')
659 return c - 'a' + 10;
660 if (TYPE (c) == G_UNICODE_DECIMAL_NUMBER)
661 return ATTTABLE (c >> 8, c & 0xff);
662 return -1;
663 }
664  
665 /**
666 * g_unichar_type:
667 * @c: a Unicode character
668 *
669 * Classifies a Unicode character by type.
670 *
671 * Returns: the type of the character.
672 **/
673 GUnicodeType
674 g_unichar_type (gunichar c)
675 {
676 return TYPE (c);
677 }
678  
679 /*
680 * Case mapping functions
681 */
682  
683 typedef enum {
684 LOCALE_NORMAL,
685 LOCALE_TURKIC,
686 LOCALE_LITHUANIAN
687 } LocaleType;
688  
689 static LocaleType
690 get_locale_type (void)
691 {
692 #ifdef G_OS_WIN32
693 char *tem = g_win32_getlocale ();
694 char locale[2];
695  
696 locale[0] = tem[0];
697 locale[1] = tem[1];
698 g_free (tem);
699 #else
700 const char *locale = setlocale (LC_CTYPE, NULL);
701  
702 if (locale == NULL)
703 return LOCALE_NORMAL;
704 #endif
705  
706 switch (locale[0])
707 {
708 case 'a':
709 if (locale[1] == 'z')
710 return LOCALE_TURKIC;
711 break;
712 case 'l':
713 if (locale[1] == 't')
714 return LOCALE_LITHUANIAN;
715 break;
716 case 't':
717 if (locale[1] == 'r')
718 return LOCALE_TURKIC;
719 break;
720 }
721  
722 return LOCALE_NORMAL;
723 }
724  
725 static gint
726 output_marks (const char **p_inout,
727 char *out_buffer,
728 gboolean remove_dot)
729 {
730 const char *p = *p_inout;
731 gint len = 0;
732  
733 while (*p)
734 {
735 gunichar c = g_utf8_get_char (p);
736  
737 if (ISMARK (TYPE (c)))
738 {
739 if (!remove_dot || c != 0x307 /* COMBINING DOT ABOVE */)
740 len += g_unichar_to_utf8 (c, out_buffer ? out_buffer + len : NULL);
741 p = g_utf8_next_char (p);
742 }
743 else
744 break;
745 }
746  
747 *p_inout = p;
748 return len;
749 }
750  
751 static gint
752 output_special_case (gchar *out_buffer,
753 int offset,
754 int type,
755 int which)
756 {
757 const gchar *p = special_case_table + offset;
758 gint len;
759  
760 if (type != G_UNICODE_TITLECASE_LETTER)
761 p = g_utf8_next_char (p);
762  
763 if (which == 1)
764 p += strlen (p) + 1;
765  
766 len = strlen (p);
767 if (out_buffer)
768 memcpy (out_buffer, p, len);
769  
770 return len;
771 }
772  
773 static gsize
774 real_toupper (const gchar *str,
775 gssize max_len,
776 gchar *out_buffer,
777 LocaleType locale_type)
778 {
779 const gchar *p = str;
780 const char *last = NULL;
781 gsize len = 0;
782 gboolean last_was_i = FALSE;
783  
784 while ((max_len < 0 || p < str + max_len) && *p)
785 {
786 gunichar c = g_utf8_get_char (p);
787 int t = TYPE (c);
788 gunichar val;
789  
790 last = p;
791 p = g_utf8_next_char (p);
792  
793 if (locale_type == LOCALE_LITHUANIAN)
794 {
795 if (c == 'i')
796 last_was_i = TRUE;
797 else
798 {
799 if (last_was_i)
800 {
801 /* Nasty, need to remove any dot above. Though
802 * I think only E WITH DOT ABOVE occurs in practice
803 * which could simplify this considerably.
804 */
805 gsize decomp_len, i;
806 gunichar decomp[G_UNICHAR_MAX_DECOMPOSITION_LENGTH];
807  
808 decomp_len = g_unichar_fully_decompose (c, FALSE, decomp, G_N_ELEMENTS (decomp));
809 for (i=0; i < decomp_len; i++)
810 {
811 if (decomp[i] != 0x307 /* COMBINING DOT ABOVE */)
812 len += g_unichar_to_utf8 (g_unichar_toupper (decomp[i]), out_buffer ? out_buffer + len : NULL);
813 }
814  
815 len += output_marks (&p, out_buffer ? out_buffer + len : NULL, TRUE);
816  
817 continue;
818 }
819  
820 if (!ISMARK (t))
821 last_was_i = FALSE;
822 }
823 }
824  
825 if (locale_type == LOCALE_TURKIC && c == 'i')
826 {
827 /* i => LATIN CAPITAL LETTER I WITH DOT ABOVE */
828 len += g_unichar_to_utf8 (0x130, out_buffer ? out_buffer + len : NULL);
829 }
830 else if (c == 0x0345) /* COMBINING GREEK YPOGEGRAMMENI */
831 {
832 /* Nasty, need to move it after other combining marks .. this would go away if
833 * we normalized first.
834 */
835 len += output_marks (&p, out_buffer ? out_buffer + len : NULL, FALSE);
836  
837 /* And output as GREEK CAPITAL LETTER IOTA */
838 len += g_unichar_to_utf8 (0x399, out_buffer ? out_buffer + len : NULL);
839 }
840 else if (IS (t,
841 OR (G_UNICODE_LOWERCASE_LETTER,
842 OR (G_UNICODE_TITLECASE_LETTER,
843 0))))
844 {
845 val = ATTTABLE (c >> 8, c & 0xff);
846  
847 if (val >= 0x1000000)
848 {
849 len += output_special_case (out_buffer ? out_buffer + len : NULL, val - 0x1000000, t,
850 t == G_UNICODE_LOWERCASE_LETTER ? 0 : 1);
851 }
852 else
853 {
854 if (t == G_UNICODE_TITLECASE_LETTER)
855 {
856 unsigned int i;
857 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
858 {
859 if (title_table[i][0] == c)
860 {
861 val = title_table[i][1];
862 break;
863 }
864 }
865 }
866  
867 /* Some lowercase letters, e.g., U+000AA, FEMININE ORDINAL INDICATOR,
868 * do not have an uppercase equivalent, in which case val will be
869 * zero. */
870 len += g_unichar_to_utf8 (val ? val : c, out_buffer ? out_buffer + len : NULL);
871 }
872 }
873 else
874 {
875 gsize char_len = g_utf8_skip[*(guchar *)last];
876  
877 if (out_buffer)
878 memcpy (out_buffer + len, last, char_len);
879  
880 len += char_len;
881 }
882  
883 }
884  
885 return len;
886 }
887  
888 /**
889 * g_utf8_strup:
890 * @str: a UTF-8 encoded string
891 * @len: length of @str, in bytes, or -1 if @str is nul-terminated.
892 *
893 * Converts all Unicode characters in the string that have a case
894 * to uppercase. The exact manner that this is done depends
895 * on the current locale, and may result in the number of
896 * characters in the string increasing. (For instance, the
897 * German ess-zet will be changed to SS.)
898 *
899 * Returns: a newly allocated string, with all characters
900 * converted to uppercase.
901 **/
902 gchar *
903 g_utf8_strup (const gchar *str,
904 gssize len)
905 {
906 gsize result_len;
907 LocaleType locale_type;
908 gchar *result;
909  
910 g_return_val_if_fail (str != NULL, NULL);
911  
912 locale_type = get_locale_type ();
913  
914 /*
915 * We use a two pass approach to keep memory management simple
916 */
917 result_len = real_toupper (str, len, NULL, locale_type);
918 result = g_malloc (result_len + 1);
919 real_toupper (str, len, result, locale_type);
920 result[result_len] = '\0';
921  
922 return result;
923 }
924  
925 /* traverses the string checking for characters with combining class == 230
926 * until a base character is found */
927 static gboolean
928 has_more_above (const gchar *str)
929 {
930 const gchar *p = str;
931 gint combining_class;
932  
933 while (*p)
934 {
935 combining_class = g_unichar_combining_class (g_utf8_get_char (p));
936 if (combining_class == 230)
937 return TRUE;
938 else if (combining_class == 0)
939 break;
940  
941 p = g_utf8_next_char (p);
942 }
943  
944 return FALSE;
945 }
946  
947 static gsize
948 real_tolower (const gchar *str,
949 gssize max_len,
950 gchar *out_buffer,
951 LocaleType locale_type)
952 {
953 const gchar *p = str;
954 const char *last = NULL;
955 gsize len = 0;
956  
957 while ((max_len < 0 || p < str + max_len) && *p)
958 {
959 gunichar c = g_utf8_get_char (p);
960 int t = TYPE (c);
961 gunichar val;
962  
963 last = p;
964 p = g_utf8_next_char (p);
965  
966 if (locale_type == LOCALE_TURKIC && c == 'I')
967 {
968 if (g_utf8_get_char (p) == 0x0307)
969 {
970 /* I + COMBINING DOT ABOVE => i (U+0069) */
971 len += g_unichar_to_utf8 (0x0069, out_buffer ? out_buffer + len : NULL);
972 p = g_utf8_next_char (p);
973 }
974 else
975 {
976 /* I => LATIN SMALL LETTER DOTLESS I */
977 len += g_unichar_to_utf8 (0x131, out_buffer ? out_buffer + len : NULL);
978 }
979 }
980 /* Introduce an explicit dot above when lowercasing capital I's and J's
981 * whenever there are more accents above. [SpecialCasing.txt] */
982 else if (locale_type == LOCALE_LITHUANIAN &&
983 (c == 0x00cc || c == 0x00cd || c == 0x0128))
984 {
985 len += g_unichar_to_utf8 (0x0069, out_buffer ? out_buffer + len : NULL);
986 len += g_unichar_to_utf8 (0x0307, out_buffer ? out_buffer + len : NULL);
987  
988 switch (c)
989 {
990 case 0x00cc:
991 len += g_unichar_to_utf8 (0x0300, out_buffer ? out_buffer + len : NULL);
992 break;
993 case 0x00cd:
994 len += g_unichar_to_utf8 (0x0301, out_buffer ? out_buffer + len : NULL);
995 break;
996 case 0x0128:
997 len += g_unichar_to_utf8 (0x0303, out_buffer ? out_buffer + len : NULL);
998 break;
999 }
1000 }
1001 else if (locale_type == LOCALE_LITHUANIAN &&
1002 (c == 'I' || c == 'J' || c == 0x012e) &&
1003 has_more_above (p))
1004 {
1005 len += g_unichar_to_utf8 (g_unichar_tolower (c), out_buffer ? out_buffer + len : NULL);
1006 len += g_unichar_to_utf8 (0x0307, out_buffer ? out_buffer + len : NULL);
1007 }
1008 else if (c == 0x03A3) /* GREEK CAPITAL LETTER SIGMA */
1009 {
1010 if ((max_len < 0 || p < str + max_len) && *p)
1011 {
1012 gunichar next_c = g_utf8_get_char (p);
1013 int next_type = TYPE(next_c);
1014  
1015 /* SIGMA mapps differently depending on whether it is
1016 * final or not. The following simplified test would
1017 * fail in the case of combining marks following the
1018 * sigma, but I don't think that occurs in real text.
1019 * The test here matches that in ICU.
1020 */
1021 if (ISALPHA (next_type)) /* Lu,Ll,Lt,Lm,Lo */
1022 val = 0x3c3; /* GREEK SMALL SIGMA */
1023 else
1024 val = 0x3c2; /* GREEK SMALL FINAL SIGMA */
1025 }
1026 else
1027 val = 0x3c2; /* GREEK SMALL FINAL SIGMA */
1028  
1029 len += g_unichar_to_utf8 (val, out_buffer ? out_buffer + len : NULL);
1030 }
1031 else if (IS (t,
1032 OR (G_UNICODE_UPPERCASE_LETTER,
1033 OR (G_UNICODE_TITLECASE_LETTER,
1034 0))))
1035 {
1036 val = ATTTABLE (c >> 8, c & 0xff);
1037  
1038 if (val >= 0x1000000)
1039 {
1040 len += output_special_case (out_buffer ? out_buffer + len : NULL, val - 0x1000000, t, 0);
1041 }
1042 else
1043 {
1044 if (t == G_UNICODE_TITLECASE_LETTER)
1045 {
1046 unsigned int i;
1047 for (i = 0; i < G_N_ELEMENTS (title_table); ++i)
1048 {
1049 if (title_table[i][0] == c)
1050 {
1051 val = title_table[i][2];
1052 break;
1053 }
1054 }
1055 }
1056  
1057 /* Not all uppercase letters are guaranteed to have a lowercase
1058 * equivalent. If this is the case, val will be zero. */
1059 len += g_unichar_to_utf8 (val ? val : c, out_buffer ? out_buffer + len : NULL);
1060 }
1061 }
1062 else
1063 {
1064 gsize char_len = g_utf8_skip[*(guchar *)last];
1065  
1066 if (out_buffer)
1067 memcpy (out_buffer + len, last, char_len);
1068  
1069 len += char_len;
1070 }
1071  
1072 }
1073  
1074 return len;
1075 }
1076  
1077 /**
1078 * g_utf8_strdown:
1079 * @str: a UTF-8 encoded string
1080 * @len: length of @str, in bytes, or -1 if @str is nul-terminated.
1081 *
1082 * Converts all Unicode characters in the string that have a case
1083 * to lowercase. The exact manner that this is done depends
1084 * on the current locale, and may result in the number of
1085 * characters in the string changing.
1086 *
1087 * Returns: a newly allocated string, with all characters
1088 * converted to lowercase.
1089 **/
1090 gchar *
1091 g_utf8_strdown (const gchar *str,
1092 gssize len)
1093 {
1094 gsize result_len;
1095 LocaleType locale_type;
1096 gchar *result;
1097  
1098 g_return_val_if_fail (str != NULL, NULL);
1099  
1100 locale_type = get_locale_type ();
1101  
1102 /*
1103 * We use a two pass approach to keep memory management simple
1104 */
1105 result_len = real_tolower (str, len, NULL, locale_type);
1106 result = g_malloc (result_len + 1);
1107 real_tolower (str, len, result, locale_type);
1108 result[result_len] = '\0';
1109  
1110 return result;
1111 }
1112  
1113 /**
1114 * g_utf8_casefold:
1115 * @str: a UTF-8 encoded string
1116 * @len: length of @str, in bytes, or -1 if @str is nul-terminated.
1117 *
1118 * Converts a string into a form that is independent of case. The
1119 * result will not correspond to any particular case, but can be
1120 * compared for equality or ordered with the results of calling
1121 * g_utf8_casefold() on other strings.
1122 *
1123 * Note that calling g_utf8_casefold() followed by g_utf8_collate() is
1124 * only an approximation to the correct linguistic case insensitive
1125 * ordering, though it is a fairly good one. Getting this exactly
1126 * right would require a more sophisticated collation function that
1127 * takes case sensitivity into account. GLib does not currently
1128 * provide such a function.
1129 *
1130 * Returns: a newly allocated string, that is a
1131 * case independent form of @str.
1132 **/
1133 gchar *
1134 g_utf8_casefold (const gchar *str,
1135 gssize len)
1136 {
1137 GString *result;
1138 const char *p;
1139  
1140 g_return_val_if_fail (str != NULL, NULL);
1141  
1142 result = g_string_new (NULL);
1143 p = str;
1144 while ((len < 0 || p < str + len) && *p)
1145 {
1146 gunichar ch = g_utf8_get_char (p);
1147  
1148 int start = 0;
1149 int end = G_N_ELEMENTS (casefold_table);
1150  
1151 if (ch >= casefold_table[start].ch &&
1152 ch <= casefold_table[end - 1].ch)
1153 {
1154 while (TRUE)
1155 {
1156 int half = (start + end) / 2;
1157 if (ch == casefold_table[half].ch)
1158 {
1159 g_string_append (result, casefold_table[half].data);
1160 goto next;
1161 }
1162 else if (half == start)
1163 break;
1164 else if (ch > casefold_table[half].ch)
1165 start = half;
1166 else
1167 end = half;
1168 }
1169 }
1170  
1171 g_string_append_unichar (result, g_unichar_tolower (ch));
1172  
1173 next:
1174 p = g_utf8_next_char (p);
1175 }
1176  
1177 return g_string_free (result, FALSE);
1178 }
1179  
1180 /**
1181 * g_unichar_get_mirror_char:
1182 * @ch: a Unicode character
1183 * @mirrored_ch: location to store the mirrored character
1184 *
1185 * In Unicode, some characters are "mirrored". This means that their
1186 * images are mirrored horizontally in text that is laid out from right
1187 * to left. For instance, "(" would become its mirror image, ")", in
1188 * right-to-left text.
1189 *
1190 * If @ch has the Unicode mirrored property and there is another unicode
1191 * character that typically has a glyph that is the mirror image of @ch's
1192 * glyph and @mirrored_ch is set, it puts that character in the address
1193 * pointed to by @mirrored_ch. Otherwise the original character is put.
1194 *
1195 * Returns: %TRUE if @ch has a mirrored character, %FALSE otherwise
1196 *
1197 * Since: 2.4
1198 **/
1199 gboolean
1200 g_unichar_get_mirror_char (gunichar ch,
1201 gunichar *mirrored_ch)
1202 {
1203 gboolean found;
1204 gunichar mirrored;
1205  
1206 mirrored = GLIB_GET_MIRRORING(ch);
1207  
1208 found = ch != mirrored;
1209 if (mirrored_ch)
1210 *mirrored_ch = mirrored;
1211  
1212 return found;
1213  
1214 }
1215  
1216 #define G_SCRIPT_TABLE_MIDPOINT (G_N_ELEMENTS (g_script_table) / 2)
1217  
1218 static inline GUnicodeScript
1219 g_unichar_get_script_bsearch (gunichar ch)
1220 {
1221 int lower = 0;
1222 int upper = G_N_ELEMENTS (g_script_table) - 1;
1223 static int saved_mid = G_SCRIPT_TABLE_MIDPOINT;
1224 int mid = saved_mid;
1225  
1226  
1227 do
1228 {
1229 if (ch < g_script_table[mid].start)
1230 upper = mid - 1;
1231 else if (ch >= g_script_table[mid].start + g_script_table[mid].chars)
1232 lower = mid + 1;
1233 else
1234 return g_script_table[saved_mid = mid].script;
1235  
1236 mid = (lower + upper) / 2;
1237 }
1238 while (lower <= upper);
1239  
1240 return G_UNICODE_SCRIPT_UNKNOWN;
1241 }
1242  
1243 /**
1244 * g_unichar_get_script:
1245 * @ch: a Unicode character
1246 *
1247 * Looks up the #GUnicodeScript for a particular character (as defined
1248 * by Unicode Standard Annex \#24). No check is made for @ch being a
1249 * valid Unicode character; if you pass in invalid character, the
1250 * result is undefined.
1251 *
1252 * This function is equivalent to pango_script_for_unichar() and the
1253 * two are interchangeable.
1254 *
1255 * Returns: the #GUnicodeScript for the character.
1256 *
1257 * Since: 2.14
1258 */
1259 GUnicodeScript
1260 g_unichar_get_script (gunichar ch)
1261 {
1262 if (ch < G_EASY_SCRIPTS_RANGE)
1263 return g_script_easy_table[ch];
1264 else
1265 return g_unichar_get_script_bsearch (ch);
1266 }
1267  
1268  
1269 /* http://unicode.org/iso15924/ */
1270 static const guint32 iso15924_tags[] =
1271 {
1272 #define PACK(a,b,c,d) ((guint32)((((guint8)(a))<<24)|(((guint8)(b))<<16)|(((guint8)(c))<<8)|((guint8)(d))))
1273  
1274 PACK ('Z','y','y','y'), /* G_UNICODE_SCRIPT_COMMON */
1275 PACK ('Z','i','n','h'), /* G_UNICODE_SCRIPT_INHERITED */
1276 PACK ('A','r','a','b'), /* G_UNICODE_SCRIPT_ARABIC */
1277 PACK ('A','r','m','n'), /* G_UNICODE_SCRIPT_ARMENIAN */
1278 PACK ('B','e','n','g'), /* G_UNICODE_SCRIPT_BENGALI */
1279 PACK ('B','o','p','o'), /* G_UNICODE_SCRIPT_BOPOMOFO */
1280 PACK ('C','h','e','r'), /* G_UNICODE_SCRIPT_CHEROKEE */
1281 PACK ('C','o','p','t'), /* G_UNICODE_SCRIPT_COPTIC */
1282 PACK ('C','y','r','l'), /* G_UNICODE_SCRIPT_CYRILLIC */
1283 PACK ('D','s','r','t'), /* G_UNICODE_SCRIPT_DESERET */
1284 PACK ('D','e','v','a'), /* G_UNICODE_SCRIPT_DEVANAGARI */
1285 PACK ('E','t','h','i'), /* G_UNICODE_SCRIPT_ETHIOPIC */
1286 PACK ('G','e','o','r'), /* G_UNICODE_SCRIPT_GEORGIAN */
1287 PACK ('G','o','t','h'), /* G_UNICODE_SCRIPT_GOTHIC */
1288 PACK ('G','r','e','k'), /* G_UNICODE_SCRIPT_GREEK */
1289 PACK ('G','u','j','r'), /* G_UNICODE_SCRIPT_GUJARATI */
1290 PACK ('G','u','r','u'), /* G_UNICODE_SCRIPT_GURMUKHI */
1291 PACK ('H','a','n','i'), /* G_UNICODE_SCRIPT_HAN */
1292 PACK ('H','a','n','g'), /* G_UNICODE_SCRIPT_HANGUL */
1293 PACK ('H','e','b','r'), /* G_UNICODE_SCRIPT_HEBREW */
1294 PACK ('H','i','r','a'), /* G_UNICODE_SCRIPT_HIRAGANA */
1295 PACK ('K','n','d','a'), /* G_UNICODE_SCRIPT_KANNADA */
1296 PACK ('K','a','n','a'), /* G_UNICODE_SCRIPT_KATAKANA */
1297 PACK ('K','h','m','r'), /* G_UNICODE_SCRIPT_KHMER */
1298 PACK ('L','a','o','o'), /* G_UNICODE_SCRIPT_LAO */
1299 PACK ('L','a','t','n'), /* G_UNICODE_SCRIPT_LATIN */
1300 PACK ('M','l','y','m'), /* G_UNICODE_SCRIPT_MALAYALAM */
1301 PACK ('M','o','n','g'), /* G_UNICODE_SCRIPT_MONGOLIAN */
1302 PACK ('M','y','m','r'), /* G_UNICODE_SCRIPT_MYANMAR */
1303 PACK ('O','g','a','m'), /* G_UNICODE_SCRIPT_OGHAM */
1304 PACK ('I','t','a','l'), /* G_UNICODE_SCRIPT_OLD_ITALIC */
1305 PACK ('O','r','y','a'), /* G_UNICODE_SCRIPT_ORIYA */
1306 PACK ('R','u','n','r'), /* G_UNICODE_SCRIPT_RUNIC */
1307 PACK ('S','i','n','h'), /* G_UNICODE_SCRIPT_SINHALA */
1308 PACK ('S','y','r','c'), /* G_UNICODE_SCRIPT_SYRIAC */
1309 PACK ('T','a','m','l'), /* G_UNICODE_SCRIPT_TAMIL */
1310 PACK ('T','e','l','u'), /* G_UNICODE_SCRIPT_TELUGU */
1311 PACK ('T','h','a','a'), /* G_UNICODE_SCRIPT_THAANA */
1312 PACK ('T','h','a','i'), /* G_UNICODE_SCRIPT_THAI */
1313 PACK ('T','i','b','t'), /* G_UNICODE_SCRIPT_TIBETAN */
1314 PACK ('C','a','n','s'), /* G_UNICODE_SCRIPT_CANADIAN_ABORIGINAL */
1315 PACK ('Y','i','i','i'), /* G_UNICODE_SCRIPT_YI */
1316 PACK ('T','g','l','g'), /* G_UNICODE_SCRIPT_TAGALOG */
1317 PACK ('H','a','n','o'), /* G_UNICODE_SCRIPT_HANUNOO */
1318 PACK ('B','u','h','d'), /* G_UNICODE_SCRIPT_BUHID */
1319 PACK ('T','a','g','b'), /* G_UNICODE_SCRIPT_TAGBANWA */
1320  
1321 /* Unicode-4.0 additions */
1322 PACK ('B','r','a','i'), /* G_UNICODE_SCRIPT_BRAILLE */
1323 PACK ('C','p','r','t'), /* G_UNICODE_SCRIPT_CYPRIOT */
1324 PACK ('L','i','m','b'), /* G_UNICODE_SCRIPT_LIMBU */
1325 PACK ('O','s','m','a'), /* G_UNICODE_SCRIPT_OSMANYA */
1326 PACK ('S','h','a','w'), /* G_UNICODE_SCRIPT_SHAVIAN */
1327 PACK ('L','i','n','b'), /* G_UNICODE_SCRIPT_LINEAR_B */
1328 PACK ('T','a','l','e'), /* G_UNICODE_SCRIPT_TAI_LE */
1329 PACK ('U','g','a','r'), /* G_UNICODE_SCRIPT_UGARITIC */
1330  
1331 /* Unicode-4.1 additions */
1332 PACK ('T','a','l','u'), /* G_UNICODE_SCRIPT_NEW_TAI_LUE */
1333 PACK ('B','u','g','i'), /* G_UNICODE_SCRIPT_BUGINESE */
1334 PACK ('G','l','a','g'), /* G_UNICODE_SCRIPT_GLAGOLITIC */
1335 PACK ('T','f','n','g'), /* G_UNICODE_SCRIPT_TIFINAGH */
1336 PACK ('S','y','l','o'), /* G_UNICODE_SCRIPT_SYLOTI_NAGRI */
1337 PACK ('X','p','e','o'), /* G_UNICODE_SCRIPT_OLD_PERSIAN */
1338 PACK ('K','h','a','r'), /* G_UNICODE_SCRIPT_KHAROSHTHI */
1339  
1340 /* Unicode-5.0 additions */
1341 PACK ('Z','z','z','z'), /* G_UNICODE_SCRIPT_UNKNOWN */
1342 PACK ('B','a','l','i'), /* G_UNICODE_SCRIPT_BALINESE */
1343 PACK ('X','s','u','x'), /* G_UNICODE_SCRIPT_CUNEIFORM */
1344 PACK ('P','h','n','x'), /* G_UNICODE_SCRIPT_PHOENICIAN */
1345 PACK ('P','h','a','g'), /* G_UNICODE_SCRIPT_PHAGS_PA */
1346 PACK ('N','k','o','o'), /* G_UNICODE_SCRIPT_NKO */
1347  
1348 /* Unicode-5.1 additions */
1349 PACK ('K','a','l','i'), /* G_UNICODE_SCRIPT_KAYAH_LI */
1350 PACK ('L','e','p','c'), /* G_UNICODE_SCRIPT_LEPCHA */
1351 PACK ('R','j','n','g'), /* G_UNICODE_SCRIPT_REJANG */
1352 PACK ('S','u','n','d'), /* G_UNICODE_SCRIPT_SUNDANESE */
1353 PACK ('S','a','u','r'), /* G_UNICODE_SCRIPT_SAURASHTRA */
1354 PACK ('C','h','a','m'), /* G_UNICODE_SCRIPT_CHAM */
1355 PACK ('O','l','c','k'), /* G_UNICODE_SCRIPT_OL_CHIKI */
1356 PACK ('V','a','i','i'), /* G_UNICODE_SCRIPT_VAI */
1357 PACK ('C','a','r','i'), /* G_UNICODE_SCRIPT_CARIAN */
1358 PACK ('L','y','c','i'), /* G_UNICODE_SCRIPT_LYCIAN */
1359 PACK ('L','y','d','i'), /* G_UNICODE_SCRIPT_LYDIAN */
1360  
1361 /* Unicode-5.2 additions */
1362 PACK ('A','v','s','t'), /* G_UNICODE_SCRIPT_AVESTAN */
1363 PACK ('B','a','m','u'), /* G_UNICODE_SCRIPT_BAMUM */
1364 PACK ('E','g','y','p'), /* G_UNICODE_SCRIPT_EGYPTIAN_HIEROGLYPHS */
1365 PACK ('A','r','m','i'), /* G_UNICODE_SCRIPT_IMPERIAL_ARAMAIC */
1366 PACK ('P','h','l','i'), /* G_UNICODE_SCRIPT_INSCRIPTIONAL_PAHLAVI */
1367 PACK ('P','r','t','i'), /* G_UNICODE_SCRIPT_INSCRIPTIONAL_PARTHIAN */
1368 PACK ('J','a','v','a'), /* G_UNICODE_SCRIPT_JAVANESE */
1369 PACK ('K','t','h','i'), /* G_UNICODE_SCRIPT_KAITHI */
1370 PACK ('L','i','s','u'), /* G_UNICODE_SCRIPT_LISU */
1371 PACK ('M','t','e','i'), /* G_UNICODE_SCRIPT_MEETEI_MAYEK */
1372 PACK ('S','a','r','b'), /* G_UNICODE_SCRIPT_OLD_SOUTH_ARABIAN */
1373 PACK ('O','r','k','h'), /* G_UNICODE_SCRIPT_OLD_TURKIC */
1374 PACK ('S','a','m','r'), /* G_UNICODE_SCRIPT_SAMARITAN */
1375 PACK ('L','a','n','a'), /* G_UNICODE_SCRIPT_TAI_THAM */
1376 PACK ('T','a','v','t'), /* G_UNICODE_SCRIPT_TAI_VIET */
1377  
1378 /* Unicode-6.0 additions */
1379 PACK ('B','a','t','k'), /* G_UNICODE_SCRIPT_BATAK */
1380 PACK ('B','r','a','h'), /* G_UNICODE_SCRIPT_BRAHMI */
1381 PACK ('M','a','n','d'), /* G_UNICODE_SCRIPT_MANDAIC */
1382  
1383 /* Unicode-6.1 additions */
1384 PACK ('C','a','k','m'), /* G_UNICODE_SCRIPT_CHAKMA */
1385 PACK ('M','e','r','c'), /* G_UNICODE_SCRIPT_MEROITIC_CURSIVE */
1386 PACK ('M','e','r','o'), /* G_UNICODE_SCRIPT_MEROITIC_HIEROGLYPHS */
1387 PACK ('P','l','r','d'), /* G_UNICODE_SCRIPT_MIAO */
1388 PACK ('S','h','r','d'), /* G_UNICODE_SCRIPT_SHARADA */
1389 PACK ('S','o','r','a'), /* G_UNICODE_SCRIPT_SORA_SOMPENG */
1390 PACK ('T','a','k','r'), /* G_UNICODE_SCRIPT_TAKRI */
1391  
1392 /* Unicode 7.0 additions */
1393 PACK ('B','a','s','s'), /* G_UNICODE_SCRIPT_BASSA_VAH */
1394 PACK ('A','g','h','b'), /* G_UNICODE_SCRIPT_CAUCASIAN_ALBANIAN */
1395 PACK ('D','u','p','l'), /* G_UNICODE_SCRIPT_DUPLOYAN */
1396 PACK ('E','l','b','a'), /* G_UNICODE_SCRIPT_ELBASAN */
1397 PACK ('G','r','a','n'), /* G_UNICODE_SCRIPT_GRANTHA */
1398 PACK ('K','h','o','j'), /* G_UNICODE_SCRIPT_KHOJKI*/
1399 PACK ('S','i','n','d'), /* G_UNICODE_SCRIPT_KHUDAWADI */
1400 PACK ('L','i','n','a'), /* G_UNICODE_SCRIPT_LINEAR_A */
1401 PACK ('M','a','h','j'), /* G_UNICODE_SCRIPT_MAHAJANI */
1402 PACK ('M','a','n','u'), /* G_UNICODE_SCRIPT_MANICHAEAN */
1403 PACK ('M','e','n','d'), /* G_UNICODE_SCRIPT_MENDE_KIKAKUI */
1404 PACK ('M','o','d','i'), /* G_UNICODE_SCRIPT_MODI */
1405 PACK ('M','r','o','o'), /* G_UNICODE_SCRIPT_MRO */
1406 PACK ('N','b','a','t'), /* G_UNICODE_SCRIPT_NABATAEAN */
1407 PACK ('N','a','r','b'), /* G_UNICODE_SCRIPT_OLD_NORTH_ARABIAN */
1408 PACK ('P','e','r','m'), /* G_UNICODE_SCRIPT_OLD_PERMIC */
1409 PACK ('H','m','n','g'), /* G_UNICODE_SCRIPT_PAHAWH_HMONG */
1410 PACK ('P','a','l','m'), /* G_UNICODE_SCRIPT_PALMYRENE */
1411 PACK ('P','a','u','c'), /* G_UNICODE_SCRIPT_PAU_CIN_HAU */
1412 PACK ('P','h','l','p'), /* G_UNICODE_SCRIPT_PSALTER_PAHLAVI */
1413 PACK ('S','i','d','d'), /* G_UNICODE_SCRIPT_SIDDHAM */
1414 PACK ('T','i','r','h'), /* G_UNICODE_SCRIPT_TIRHUTA */
1415 PACK ('W','a','r','a'), /* G_UNICODE_SCRIPT_WARANG_CITI */
1416  
1417 /* Unicode 8.0 additions */
1418 PACK ('A','h','o','m'), /* G_UNICODE_SCRIPT_AHOM */
1419 PACK ('H','l','u','w'), /* G_UNICODE_SCRIPT_ANATOLIAN_HIEROGLYPHS */
1420 PACK ('H','a','t','r'), /* G_UNICODE_SCRIPT_HATRAN */
1421 PACK ('M','u','l','t'), /* G_UNICODE_SCRIPT_MULTANI */
1422 PACK ('H','u','n','g'), /* G_UNICODE_SCRIPT_OLD_HUNGARIAN */
1423 PACK ('S','g','n','w'), /* G_UNICODE_SCRIPT_SIGNWRITING */
1424 #undef PACK
1425 };
1426  
1427 /**
1428 * g_unicode_script_to_iso15924:
1429 * @script: a Unicode script
1430 *
1431 * Looks up the ISO 15924 code for @script. ISO 15924 assigns four-letter
1432 * codes to scripts. For example, the code for Arabic is 'Arab'. The
1433 * four letter codes are encoded as a @guint32 by this function in a
1434 * big-endian fashion. That is, the code returned for Arabic is
1435 * 0x41726162 (0x41 is ASCII code for 'A', 0x72 is ASCII code for 'r', etc).
1436 *
1437 * See
1438 * [Codes for the representation of names of scripts](http://unicode.org/iso15924/codelists.html)
1439 * for details.
1440 *
1441 * Returns: the ISO 15924 code for @script, encoded as an integer,
1442 * of zero if @script is %G_UNICODE_SCRIPT_INVALID_CODE or
1443 * ISO 15924 code 'Zzzz' (script code for UNKNOWN) if @script is not understood.
1444 *
1445 * Since: 2.30
1446 */
1447 guint32
1448 g_unicode_script_to_iso15924 (GUnicodeScript script)
1449 {
1450 if (G_UNLIKELY (script == G_UNICODE_SCRIPT_INVALID_CODE))
1451 return 0;
1452  
1453 if (G_UNLIKELY (script < 0 || script >= (int) G_N_ELEMENTS (iso15924_tags)))
1454 return 0x5A7A7A7A;
1455  
1456 return iso15924_tags[script];
1457 }
1458  
1459 /**
1460 * g_unicode_script_from_iso15924:
1461 * @iso15924: a Unicode script
1462 *
1463 * Looks up the Unicode script for @iso15924. ISO 15924 assigns four-letter
1464 * codes to scripts. For example, the code for Arabic is 'Arab'.
1465 * This function accepts four letter codes encoded as a @guint32 in a
1466 * big-endian fashion. That is, the code expected for Arabic is
1467 * 0x41726162 (0x41 is ASCII code for 'A', 0x72 is ASCII code for 'r', etc).
1468 *
1469 * See
1470 * [Codes for the representation of names of scripts](http://unicode.org/iso15924/codelists.html)
1471 * for details.
1472 *
1473 * Returns: the Unicode script for @iso15924, or
1474 * of %G_UNICODE_SCRIPT_INVALID_CODE if @iso15924 is zero and
1475 * %G_UNICODE_SCRIPT_UNKNOWN if @iso15924 is unknown.
1476 *
1477 * Since: 2.30
1478 */
1479 GUnicodeScript
1480 g_unicode_script_from_iso15924 (guint32 iso15924)
1481 {
1482 unsigned int i;
1483  
1484 if (!iso15924)
1485 return G_UNICODE_SCRIPT_INVALID_CODE;
1486  
1487 for (i = 0; i < G_N_ELEMENTS (iso15924_tags); i++)
1488 if (iso15924_tags[i] == iso15924)
1489 return (GUnicodeScript) i;
1490  
1491 return G_UNICODE_SCRIPT_UNKNOWN;
1492 }