2 * Copyright © 2009,2010 Red Hat, Inc.
3 * Copyright © 2011,2012 Google, Inc.
5 * This is part of HarfBuzz, a text shaping library.
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
29 #include "hb-private.hh"
31 #include "hb-mutex-private.hh"
32 #include "hb-object-private.hh"
39 hb_options_union_t _hb_options;
42 _hb_options_init (void)
46 u.opts.initialized = 1;
48 char *c = getenv ("HB_OPTIONS");
49 u.opts.uniscribe_bug_compatible = c && strstr (c, "uniscribe-bug-compatible");
51 /* This is idempotent and threadsafe. */
60 * @str: (array length=len) (element-type uint8_t):
70 hb_tag_from_string (const char *str, int len)
75 if (!str || !len || !*str)
78 if (len < 0 || len > 4)
80 for (i = 0; i < (unsigned) len && str[i]; i++)
85 return HB_TAG_CHAR4 (tag);
91 * @buf: (array fixed-size=4):
98 hb_tag_to_string (hb_tag_t tag, char *buf)
100 buf[0] = (char) (uint8_t) (tag >> 24);
101 buf[1] = (char) (uint8_t) (tag >> 16);
102 buf[2] = (char) (uint8_t) (tag >> 8);
103 buf[3] = (char) (uint8_t) (tag >> 0);
109 const char direction_strings[][4] = {
117 * hb_direction_from_string:
118 * @str: (array length=len) (element-type uint8_t):
128 hb_direction_from_string (const char *str, int len)
130 if (unlikely (!str || !len || !*str))
131 return HB_DIRECTION_INVALID;
133 /* Lets match loosely: just match the first letter, such that
134 * all of "ltr", "left-to-right", etc work!
136 char c = TOLOWER (str[0]);
137 for (unsigned int i = 0; i < ARRAY_LENGTH (direction_strings); i++)
138 if (c == direction_strings[i][0])
139 return (hb_direction_t) (HB_DIRECTION_LTR + i);
141 return HB_DIRECTION_INVALID;
145 * hb_direction_to_string:
150 * Return value: (transfer none):
155 hb_direction_to_string (hb_direction_t direction)
157 if (likely ((unsigned int) (direction - HB_DIRECTION_LTR)
158 < ARRAY_LENGTH (direction_strings)))
159 return direction_strings[direction - HB_DIRECTION_LTR];
167 struct hb_language_impl_t {
171 static const char canon_map[256] = {
172 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
173 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
174 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '-', 0, 0,
175 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 0, 0, 0, 0, 0, 0,
176 '-', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
177 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 0, 0, 0, 0, '-',
178 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
179 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 0, 0, 0, 0, 0
183 lang_equal (hb_language_t v1,
186 const unsigned char *p1 = (const unsigned char *) v1;
187 const unsigned char *p2 = (const unsigned char *) v2;
189 while (*p1 && *p1 == canon_map[*p2])
192 return *p1 == canon_map[*p2];
197 lang_hash (const void *key)
199 const unsigned char *p = key;
201 while (canon_map[*p])
203 h = (h << 5) - h + canon_map[*p];
212 struct hb_language_item_t {
214 struct hb_language_item_t *next;
217 inline bool operator == (const char *s) const {
218 return lang_equal (lang, s);
221 inline hb_language_item_t & operator = (const char *s) {
222 lang = (hb_language_t) strdup (s);
223 for (unsigned char *p = (unsigned char *) lang; *p; p++)
229 void finish (void) { free ((void *) lang); }
233 /* Thread-safe lock-free language list */
235 static hb_language_item_t *langs;
239 void free_langs (void)
242 hb_language_item_t *next = langs->next;
250 static hb_language_item_t *
251 lang_find_or_insert (const char *key)
254 hb_language_item_t *first_lang = (hb_language_item_t *) hb_atomic_ptr_get (&langs);
256 for (hb_language_item_t *lang = first_lang; lang; lang = lang->next)
260 /* Not found; allocate one. */
261 hb_language_item_t *lang = (hb_language_item_t *) calloc (1, sizeof (hb_language_item_t));
262 if (unlikely (!lang))
264 lang->next = first_lang;
267 if (!hb_atomic_ptr_cmpexch (&langs, first_lang, lang)) {
275 atexit (free_langs); /* First person registers atexit() callback. */
283 * hb_language_from_string:
284 * @str: (array length=len) (element-type uint8_t): a string representing
285 * ISO 639 language code
286 * @len: length of the @str, or -1 if it is %NULL-terminated.
288 * Converts @str representing an ISO 639 language code to the corresponding
291 * Return value: (transfer none):
292 * The #hb_language_t corresponding to the ISO 639 language code.
297 hb_language_from_string (const char *str, int len)
299 if (!str || !len || !*str)
300 return HB_LANGUAGE_INVALID;
302 hb_language_item_t *item = NULL;
305 /* NUL-terminate it. */
307 len = MIN (len, (int) sizeof (strbuf) - 1);
308 memcpy (strbuf, str, len);
310 item = lang_find_or_insert (strbuf);
313 item = lang_find_or_insert (str);
315 return likely (item) ? item->lang : HB_LANGUAGE_INVALID;
319 * hb_language_to_string:
320 * @language: an #hb_language_t to convert.
322 * See hb_language_from_string().
324 * Return value: (transfer none):
325 * A %NULL-terminated string representing the @language. Must not be freed by
331 hb_language_to_string (hb_language_t language)
333 /* This is actually NULL-safe! */
338 * hb_language_get_default:
342 * Return value: (transfer none):
347 hb_language_get_default (void)
349 static hb_language_t default_language = HB_LANGUAGE_INVALID;
351 hb_language_t language = (hb_language_t) hb_atomic_ptr_get (&default_language);
352 if (unlikely (language == HB_LANGUAGE_INVALID)) {
353 language = hb_language_from_string (setlocale (LC_CTYPE, NULL), -1);
354 (void) hb_atomic_ptr_cmpexch (&default_language, HB_LANGUAGE_INVALID, language);
357 return default_language;
364 * hb_script_from_iso15924_tag:
365 * @tag: an #hb_tag_t representing an ISO 15924 tag.
367 * Converts an ISO 15924 script tag to a corresponding #hb_script_t.
370 * An #hb_script_t corresponding to the ISO 15924 tag.
375 hb_script_from_iso15924_tag (hb_tag_t tag)
377 if (unlikely (tag == HB_TAG_NONE))
378 return HB_SCRIPT_INVALID;
380 /* Be lenient, adjust case (one capital letter followed by three small letters) */
381 tag = (tag & 0xDFDFDFDFu) | 0x00202020u;
385 /* These graduated from the 'Q' private-area codes, but
386 * the old code is still aliased by Unicode, and the Qaai
387 * one in use by ICU. */
388 case HB_TAG('Q','a','a','i'): return HB_SCRIPT_INHERITED;
389 case HB_TAG('Q','a','a','c'): return HB_SCRIPT_COPTIC;
391 /* Script variants from http://unicode.org/iso15924/ */
392 case HB_TAG('C','y','r','s'): return HB_SCRIPT_CYRILLIC;
393 case HB_TAG('L','a','t','f'): return HB_SCRIPT_LATIN;
394 case HB_TAG('L','a','t','g'): return HB_SCRIPT_LATIN;
395 case HB_TAG('S','y','r','e'): return HB_SCRIPT_SYRIAC;
396 case HB_TAG('S','y','r','j'): return HB_SCRIPT_SYRIAC;
397 case HB_TAG('S','y','r','n'): return HB_SCRIPT_SYRIAC;
400 /* If it looks right, just use the tag as a script */
401 if (((uint32_t) tag & 0xE0E0E0E0u) == 0x40606060u)
402 return (hb_script_t) tag;
404 /* Otherwise, return unknown */
405 return HB_SCRIPT_UNKNOWN;
409 * hb_script_from_string:
410 * @str: (array length=len) (element-type uint8_t): a string representing an
412 * @len: length of the @str, or -1 if it is %NULL-terminated.
414 * Converts a string @str representing an ISO 15924 script tag to a
415 * corresponding #hb_script_t. Shorthand for hb_tag_from_string() then
416 * hb_script_from_iso15924_tag().
419 * An #hb_script_t corresponding to the ISO 15924 tag.
424 hb_script_from_string (const char *str, int len)
426 return hb_script_from_iso15924_tag (hb_tag_from_string (str, len));
430 * hb_script_to_iso15924_tag:
431 * @script: an #hb_script_ to convert.
433 * See hb_script_from_iso15924_tag().
436 * An #hb_tag_t representing an ISO 15924 script tag.
441 hb_script_to_iso15924_tag (hb_script_t script)
443 return (hb_tag_t) script;
447 * hb_script_get_horizontal_direction:
457 hb_script_get_horizontal_direction (hb_script_t script)
459 /* http://goo.gl/x9ilM */
460 switch ((hb_tag_t) script)
462 /* Unicode-1.1 additions */
463 case HB_SCRIPT_ARABIC:
464 case HB_SCRIPT_HEBREW:
466 /* Unicode-3.0 additions */
467 case HB_SCRIPT_SYRIAC:
468 case HB_SCRIPT_THAANA:
470 /* Unicode-4.0 additions */
471 case HB_SCRIPT_CYPRIOT:
473 /* Unicode-4.1 additions */
474 case HB_SCRIPT_KHAROSHTHI:
476 /* Unicode-5.0 additions */
477 case HB_SCRIPT_PHOENICIAN:
480 /* Unicode-5.1 additions */
481 case HB_SCRIPT_LYDIAN:
483 /* Unicode-5.2 additions */
484 case HB_SCRIPT_AVESTAN:
485 case HB_SCRIPT_IMPERIAL_ARAMAIC:
486 case HB_SCRIPT_INSCRIPTIONAL_PAHLAVI:
487 case HB_SCRIPT_INSCRIPTIONAL_PARTHIAN:
488 case HB_SCRIPT_OLD_SOUTH_ARABIAN:
489 case HB_SCRIPT_OLD_TURKIC:
490 case HB_SCRIPT_SAMARITAN:
492 /* Unicode-6.0 additions */
493 case HB_SCRIPT_MANDAIC:
495 /* Unicode-6.1 additions */
496 case HB_SCRIPT_MEROITIC_CURSIVE:
497 case HB_SCRIPT_MEROITIC_HIEROGLYPHS:
499 /* Unicode-7.0 additions */
500 case HB_SCRIPT_MANICHAEAN:
501 case HB_SCRIPT_MENDE_KIKAKUI:
502 case HB_SCRIPT_NABATAEAN:
503 case HB_SCRIPT_OLD_NORTH_ARABIAN:
504 case HB_SCRIPT_PALMYRENE:
505 case HB_SCRIPT_PSALTER_PAHLAVI:
507 /* Unicode-8.0 additions */
508 case HB_SCRIPT_OLD_HUNGARIAN:
510 return HB_DIRECTION_RTL;
513 return HB_DIRECTION_LTR;
517 /* hb_user_data_array_t */
520 hb_user_data_array_t::set (hb_user_data_key_t *key,
522 hb_destroy_func_t destroy,
529 if (!data && !destroy) {
530 items.remove (key, lock);
534 hb_user_data_item_t item = {key, data, destroy};
535 bool ret = !!items.replace_or_insert (item, lock, (bool) replace);
541 hb_user_data_array_t::get (hb_user_data_key_t *key)
543 hb_user_data_item_t item = {NULL, NULL, NULL};
545 return items.find (key, &item, lock) ? item.data : NULL;
553 * @major: (out): Library major version component.
554 * @minor: (out): Library minor version component.
555 * @micro: (out): Library micro version component.
557 * Returns library version as three integer components.
562 hb_version (unsigned int *major,
566 *major = HB_VERSION_MAJOR;
567 *minor = HB_VERSION_MINOR;
568 *micro = HB_VERSION_MICRO;
574 * Returns library version as a string with three components.
576 * Return value: library version string.
581 hb_version_string (void)
583 return HB_VERSION_STRING;
587 * hb_version_atleast:
599 hb_version_atleast (unsigned int major,
603 return HB_VERSION_ATLEAST (major, minor, micro);