harfbuzz: check in harfbuzz-ng, add gyp define to use it

third_party/harfbuzz-ng/src/hb-ot-tag.c

Index: third_party/harfbuzz-ng/src/hb-ot-tag.c
diff --git a/third_party/harfbuzz-ng/src/hb-ot-tag.c b/third_party/harfbuzz-ng/src/hb-ot-tag.c
new file mode 100644
index 0000000000000000000000000000000000000000..f3e0f1f472e1ca2799ee4dc63c89ec355435996f
--- /dev/null
+++ b/third_party/harfbuzz-ng/src/hb-ot-tag.c
@@ -0,0 +1,703 @@
+/*
+ * Copyright (C) 2009  Red Hat, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ */
+
+#include "hb-private.h"
+#include "hb-ot.h"
+
+#include <string.h>
+
+HB_BEGIN_DECLS
+
+
+/*
+ * Complete list at:
+ * http://www.microsoft.com/typography/otspec/scripttags.htm
+ */
+static const hb_tag_t ot_scripts[][3] = {
+  {HB_TAG('D','F','L','T')},	/* HB_SCRIPT_COMMON */
+  {HB_TAG('D','F','L','T')},	/* HB_SCRIPT_INHERITED */
+  {HB_TAG('a','r','a','b')},	/* HB_SCRIPT_ARABIC */
+  {HB_TAG('a','r','m','n')},	/* HB_SCRIPT_ARMENIAN */
+  {HB_TAG('b','n','g','2'), HB_TAG('b','e','n','g')},	/* HB_SCRIPT_BENGALI */
+  {HB_TAG('b','o','p','o')},	/* HB_SCRIPT_BOPOMOFO */
+  {HB_TAG('c','h','e','r')},	/* HB_SCRIPT_CHEROKEE */
+  {HB_TAG('c','o','p','t')},	/* HB_SCRIPT_COPTIC */
+  {HB_TAG('c','y','r','l')},	/* HB_SCRIPT_CYRILLIC */
+  {HB_TAG('d','s','r','t')},	/* HB_SCRIPT_DESERET */
+  {HB_TAG('d','e','v','2'), HB_TAG('d','e','v','a')},	/* HB_SCRIPT_DEVANAGARI */
+  {HB_TAG('e','t','h','i')},	/* HB_SCRIPT_ETHIOPIC */
+  {HB_TAG('g','e','o','r')},	/* HB_SCRIPT_GEORGIAN */
+  {HB_TAG('g','o','t','h')},	/* HB_SCRIPT_GOTHIC */
+  {HB_TAG('g','r','e','k')},	/* HB_SCRIPT_GREEK */
+  {HB_TAG('g','j','r','2'), HB_TAG('g','u','j','r')},	/* HB_SCRIPT_GUJARATI */
+  {HB_TAG('g','u','r','2'), HB_TAG('g','u','r','u')},	/* HB_SCRIPT_GURMUKHI */
+  {HB_TAG('h','a','n','i')},	/* HB_SCRIPT_HAN */
+  {HB_TAG('h','a','n','g')},	/* HB_SCRIPT_HANGUL */
+  {HB_TAG('h','e','b','r')},	/* HB_SCRIPT_HEBREW */
+  {HB_TAG('k','a','n','a')},	/* HB_SCRIPT_HIRAGANA */
+  {HB_TAG('k','n','d','2'), HB_TAG('k','n','d','a')},	/* HB_SCRIPT_KANNADA */
+  {HB_TAG('k','a','n','a')},	/* HB_SCRIPT_KATAKANA */
+  {HB_TAG('k','h','m','r')},	/* HB_SCRIPT_KHMER */
+  {HB_TAG('l','a','o',' ')},	/* HB_SCRIPT_LAO */
+  {HB_TAG('l','a','t','n')},	/* HB_SCRIPT_LATIN */
+  {HB_TAG('m','l','m','2'), HB_TAG('m','l','y','m')},	/* HB_SCRIPT_MALAYALAM */
+  {HB_TAG('m','o','n','g')},	/* HB_SCRIPT_MONGOLIAN */
+  {HB_TAG('m','y','m','r')},	/* HB_SCRIPT_MYANMAR */
+  {HB_TAG('o','g','a','m')},	/* HB_SCRIPT_OGHAM */
+  {HB_TAG('i','t','a','l')},	/* HB_SCRIPT_OLD_ITALIC */
+  {HB_TAG('o','r','y','2'), HB_TAG('o','r','y','a')},	/* HB_SCRIPT_ORIYA */
+  {HB_TAG('r','u','n','r')},	/* HB_SCRIPT_RUNIC */
+  {HB_TAG('s','i','n','h')},	/* HB_SCRIPT_SINHALA */
+  {HB_TAG('s','y','r','c')},	/* HB_SCRIPT_SYRIAC */
+  {HB_TAG('t','m','l','2'), HB_TAG('t','a','m','l')},	/* HB_SCRIPT_TAMIL */
+  {HB_TAG('t','e','l','2'), HB_TAG('t','e','l','u')},	/* HB_SCRIPT_TELUGU */
+  {HB_TAG('t','h','a','a')},	/* HB_SCRIPT_THAANA */
+  {HB_TAG('t','h','a','i')},	/* HB_SCRIPT_THAI */
+  {HB_TAG('t','i','b','t')},	/* HB_SCRIPT_TIBETAN */
+  {HB_TAG('c','a','n','s')},	/* HB_SCRIPT_CANADIAN_ABORIGINAL */
+  {HB_TAG('y','i',' ',' ')},	/* HB_SCRIPT_YI */
+  {HB_TAG('t','g','l','g')},	/* HB_SCRIPT_TAGALOG */
+  {HB_TAG('h','a','n','o')},	/* HB_SCRIPT_HANUNOO */
+  {HB_TAG('b','u','h','d')},	/* HB_SCRIPT_BUHID */
+  {HB_TAG('t','a','g','b')},	/* HB_SCRIPT_TAGBANWA */
+
+  /* Unicode-4.0 additions */
+  {HB_TAG('b','r','a','i')},	/* HB_SCRIPT_BRAILLE */
+  {HB_TAG('c','p','r','t')},	/* HB_SCRIPT_CYPRIOT */
+  {HB_TAG('l','i','m','b')},	/* HB_SCRIPT_LIMBU */
+  {HB_TAG('o','s','m','a')},	/* HB_SCRIPT_OSMANYA */
+  {HB_TAG('s','h','a','w')},	/* HB_SCRIPT_SHAVIAN */
+  {HB_TAG('l','i','n','b')},	/* HB_SCRIPT_LINEAR_B */
+  {HB_TAG('t','a','l','e')},	/* HB_SCRIPT_TAI_LE */
+  {HB_TAG('u','g','a','r')},	/* HB_SCRIPT_UGARITIC */
+
+  /* Unicode-4.1 additions */
+  {HB_TAG('t','a','l','u')},	/* HB_SCRIPT_NEW_TAI_LUE */
+  {HB_TAG('b','u','g','i')},	/* HB_SCRIPT_BUGINESE */
+  {HB_TAG('g','l','a','g')},	/* HB_SCRIPT_GLAGOLITIC */
+  {HB_TAG('t','f','n','g')},	/* HB_SCRIPT_TIFINAGH */
+  {HB_TAG('s','y','l','o')},	/* HB_SCRIPT_SYLOTI_NAGRI */
+  {HB_TAG('x','p','e','o')},	/* HB_SCRIPT_OLD_PERSIAN */
+  {HB_TAG('k','h','a','r')},	/* HB_SCRIPT_KHAROSHTHI */
+
+  /* Unicode-5.0 additions */
+  {HB_TAG('D','F','L','T')},	/* HB_SCRIPT_UNKNOWN */
+  {HB_TAG('b','a','l','i')},	/* HB_SCRIPT_BALINESE */
+  {HB_TAG('x','s','u','x')},	/* HB_SCRIPT_CUNEIFORM */
+  {HB_TAG('p','h','n','x')},	/* HB_SCRIPT_PHOENICIAN */
+  {HB_TAG('p','h','a','g')},	/* HB_SCRIPT_PHAGS_PA */
+  {HB_TAG('n','k','o',' ')},	/* HB_SCRIPT_NKO */
+
+  /* Unicode-5.1 additions */
+  {HB_TAG('k','a','l','i')},	/* HB_SCRIPT_KAYAH_LI */
+  {HB_TAG('l','e','p','c')},	/* HB_SCRIPT_LEPCHA */
+  {HB_TAG('r','j','n','g')},	/* HB_SCRIPT_REJANG */
+  {HB_TAG('s','u','n','d')},	/* HB_SCRIPT_SUNDANESE */
+  {HB_TAG('s','a','u','r')},	/* HB_SCRIPT_SAURASHTRA */
+  {HB_TAG('c','h','a','m')},	/* HB_SCRIPT_CHAM */
+  {HB_TAG('o','l','c','k')},	/* HB_SCRIPT_OL_CHIKI */
+  {HB_TAG('v','a','i',' ')},	/* HB_SCRIPT_VAI */
+  {HB_TAG('c','a','r','i')},	/* HB_SCRIPT_CARIAN */
+  {HB_TAG('l','y','c','i')},	/* HB_SCRIPT_LYCIAN */
+  {HB_TAG('l','y','d','i')},	/* HB_SCRIPT_LYDIAN */
+
+  /* Unicode-5.2 additions */
+  {HB_TAG('a','v','s','t')},	/* HB_SCRIPT_AVESTAN */
+  {HB_TAG('b','a','m','u')},	/* HB_SCRIPT_BAMUM */
+  {HB_TAG('e','g','y','p')},	/* HB_SCRIPT_EGYPTIAN_HIEROGLYPHS */
+  {HB_TAG('a','r','m','i')},	/* HB_SCRIPT_IMPERIAL_ARAMAIC */
+  {HB_TAG('p','h','l','i')},	/* HB_SCRIPT_INSCRIPTIONAL_PAHLAVI */
+  {HB_TAG('p','r','t','i')},	/* HB_SCRIPT_INSCRIPTIONAL_PARTHIAN */
+  {HB_TAG('j','a','v','a')},	/* HB_SCRIPT_JAVANESE */
+  {HB_TAG('k','t','h','i')},	/* HB_SCRIPT_KAITHI */
+  {HB_TAG('l','i','s','u')},	/* HB_SCRIPT_LISU */
+  {HB_TAG('m','y','e','i')},	/* HB_SCRIPT_MEETEI_MAYEK */
+  {HB_TAG('s','a','r','b')},	/* HB_SCRIPT_OLD_SOUTH_ARABIAN */
+  {HB_TAG('o','r','k','h')},	/* HB_SCRIPT_OLD_TURKIC */
+  {HB_TAG('s','a','m','r')},	/* HB_SCRIPT_SAMARITAN */
+  {HB_TAG('l','a','n','a')},	/* HB_SCRIPT_TAI_THAM */
+  {HB_TAG('t','a','v','t')},	/* HB_SCRIPT_TAI_VIET */
+
+  /* Unicode-6.0 additions */
+  {HB_TAG('b','a','t','k')},	/* HB_SCRIPT_BATAK */
+  {HB_TAG('b','r','a','h')},	/* HB_SCRIPT_BRAHMI */
+  {HB_TAG('m','a','n','d')} 	/* HB_SCRIPT_MANDAIC */
+};
+
+const hb_tag_t *
+hb_ot_tags_from_script (hb_script_t script)
+{
+  static const hb_tag_t def_tag[] = {HB_OT_TAG_DEFAULT_SCRIPT, HB_TAG_NONE};
+
+  if (unlikely ((unsigned int) script >= ARRAY_LENGTH (ot_scripts)))
+    return def_tag;
+
+  return ot_scripts[script];
+}
+
+hb_script_t
+hb_ot_tag_to_script (hb_tag_t tag)
+{
+  int i;
+
+  for (i = 0; i < ARRAY_LENGTH (ot_scripts); i++) {
+    const hb_tag_t *p;
+    for (p = ot_scripts[i]; *p; p++)
+      if (tag == *p)
+        return i;
+  }
+
+  return HB_SCRIPT_UNKNOWN;
+}
+
+typedef struct {
+  char language[6];
+  hb_tag_t tag;
+} LangTag;
+
+/*
+ * Complete list at:
+ * http://www.microsoft.com/typography/otspec/languagetags.htm
+ *
+ * Generated by intersecting the OpenType language tag list from
+ * Draft OpenType 1.5 spec, with with the ISO 639-3 codes from
+ * 2008/08/04, matching on name, and finally adjusted manually.
+ *
+ * Many items still missing.  Those are commented out at the end.
+ * Keep sorted for bsearch.
+ */
+static const LangTag ot_languages[] = {
+  {"aa",	HB_TAG('A','F','R',' ')},	/* Afar */
+  {"ab",	HB_TAG('A','B','K',' ')},	/* Abkhazian */
+  {"abq",	HB_TAG('A','B','A',' ')},	/* Abaza */
+  {"ady",	HB_TAG('A','D','Y',' ')},	/* Adyghe */
+  {"af",	HB_TAG('A','F','K',' ')},	/* Afrikaans */
+  {"aiw",	HB_TAG('A','R','I',' ')},	/* Aari */
+  {"am",	HB_TAG('A','M','H',' ')},	/* Amharic */
+  {"ar",	HB_TAG('A','R','A',' ')},	/* Arabic */
+  {"arn",	HB_TAG('M','A','P',' ')},	/* Mapudungun */
+  {"as",	HB_TAG('A','S','M',' ')},	/* Assamese */
+  {"av",	HB_TAG('A','V','R',' ')},	/* Avaric */
+  {"awa",	HB_TAG('A','W','A',' ')},	/* Awadhi */
+  {"ay",	HB_TAG('A','Y','M',' ')},	/* Aymara */
+  {"az",	HB_TAG('A','Z','E',' ')},	/* Azerbaijani */
+  {"ba",	HB_TAG('B','S','H',' ')},	/* Bashkir */
+  {"bal",	HB_TAG('B','L','I',' ')},	/* Baluchi */
+  {"bcq",	HB_TAG('B','C','H',' ')},	/* Bench */
+  {"bem",	HB_TAG('B','E','M',' ')},	/* Bemba (Zambia) */
+  {"bfq",	HB_TAG('B','A','D',' ')},	/* Badaga */
+  {"bft",	HB_TAG('B','L','T',' ')},	/* Balti */
+  {"bg",	HB_TAG('B','G','R',' ')},	/* Bulgarian */
+  {"bhb",	HB_TAG('B','H','I',' ')},	/* Bhili */
+  {"bho",	HB_TAG('B','H','O',' ')},	/* Bhojpuri */
+  {"bik",	HB_TAG('B','I','K',' ')},	/* Bikol */
+  {"bin",	HB_TAG('E','D','O',' ')},	/* Bini */
+  {"bm",	HB_TAG('B','M','B',' ')},	/* Bambara */
+  {"bn",	HB_TAG('B','E','N',' ')},	/* Bengali */
+  {"bo",	HB_TAG('T','I','B',' ')},	/* Tibetan */
+  {"br",	HB_TAG('B','R','E',' ')},	/* Breton */
+  {"brh",	HB_TAG('B','R','H',' ')},	/* Brahui */
+  {"bs",	HB_TAG('B','O','S',' ')},	/* Bosnian */
+  {"btb",	HB_TAG('B','T','I',' ')},	/* Beti (Cameroon) */
+  {"ca",	HB_TAG('C','A','T',' ')},	/* Catalan */
+  {"ce",	HB_TAG('C','H','E',' ')},	/* Chechen */
+  {"ceb",	HB_TAG('C','E','B',' ')},	/* Cebuano */
+  {"chp",	HB_TAG('C','H','P',' ')},	/* Chipewyan */
+  {"chr",	HB_TAG('C','H','R',' ')},	/* Cherokee */
+  {"cop",	HB_TAG('C','O','P',' ')},	/* Coptic */
+  {"cr",	HB_TAG('C','R','E',' ')},	/* Cree */
+  {"crh",	HB_TAG('C','R','T',' ')},	/* Crimean Tatar */
+  {"crm",	HB_TAG('M','C','R',' ')},	/* Moose Cree */
+  {"crx",	HB_TAG('C','R','R',' ')},	/* Carrier */
+  {"cs",	HB_TAG('C','S','Y',' ')},	/* Czech */
+  {"cu",	HB_TAG('C','S','L',' ')},	/* Church Slavic */
+  {"cv",	HB_TAG('C','H','U',' ')},	/* Chuvash */
+  {"cwd",	HB_TAG('D','C','R',' ')},	/* Woods Cree */
+  {"cy",	HB_TAG('W','E','L',' ')},	/* Welsh */
+  {"da",	HB_TAG('D','A','N',' ')},	/* Danish */
+  {"dap",	HB_TAG('N','I','S',' ')},	/* Nisi (India) */
+  {"dar",	HB_TAG('D','A','R',' ')},	/* Dargwa */
+  {"de",	HB_TAG('D','E','U',' ')},	/* German */
+  {"din",	HB_TAG('D','N','K',' ')},	/* Dinka */
+  {"dng",	HB_TAG('D','U','N',' ')},	/* Dungan */
+  {"doi",	HB_TAG('D','G','R',' ')},	/* Dogri */
+  {"dsb",	HB_TAG('L','S','B',' ')},	/* Lower Sorbian */
+  {"dv",	HB_TAG('D','I','V',' ')},	/* Dhivehi */
+  {"dz",	HB_TAG('D','Z','N',' ')},	/* Dzongkha */
+  {"ee",	HB_TAG('E','W','E',' ')},	/* Ewe */
+  {"efi",	HB_TAG('E','F','I',' ')},	/* Efik */
+  {"el",	HB_TAG('E','L','L',' ')},	/* Modern Greek (1453-) */
+  {"en",	HB_TAG('E','N','G',' ')},	/* English */
+  {"eo",	HB_TAG('N','T','O',' ')},	/* Esperanto */
+  {"eot",	HB_TAG('B','T','I',' ')},	/* Beti (Côte d'Ivoire) */
+  {"es",	HB_TAG('E','S','P',' ')},	/* Spanish */
+  {"et",	HB_TAG('E','T','I',' ')},	/* Estonian */
+  {"eu",	HB_TAG('E','U','Q',' ')},	/* Basque */
+  {"eve",	HB_TAG('E','V','N',' ')},	/* Even */
+  {"evn",	HB_TAG('E','V','K',' ')},	/* Evenki */
+  {"fa",	HB_TAG('F','A','R',' ')},	/* Persian */
+  {"ff",	HB_TAG('F','U','L',' ')},	/* Fulah */
+  {"fi",	HB_TAG('F','I','N',' ')},	/* Finnish */
+  {"fil",	HB_TAG('P','I','L',' ')},	/* Filipino */
+  {"fj",	HB_TAG('F','J','I',' ')},	/* Fijian */
+  {"fo",	HB_TAG('F','O','S',' ')},	/* Faroese */
+  {"fon",	HB_TAG('F','O','N',' ')},	/* Fon */
+  {"fr",	HB_TAG('F','R','A',' ')},	/* French */
+  {"fur",	HB_TAG('F','R','L',' ')},	/* Friulian */
+  {"fy",	HB_TAG('F','R','I',' ')},	/* Western Frisian */
+  {"ga",	HB_TAG('I','R','I',' ')},	/* Irish */
+  {"gaa",	HB_TAG('G','A','D',' ')},	/* Ga */
+  {"gag",	HB_TAG('G','A','G',' ')},	/* Gagauz */
+  {"gbm",	HB_TAG('G','A','W',' ')},	/* Garhwali */
+  {"gd",	HB_TAG('G','A','E',' ')},	/* Scottish Gaelic */
+  {"gl",	HB_TAG('G','A','L',' ')},	/* Galician */
+  {"gld",	HB_TAG('N','A','N',' ')},	/* Nanai */
+  {"gn",	HB_TAG('G','U','A',' ')},	/* Guarani */
+  {"gon",	HB_TAG('G','O','N',' ')},	/* Gondi */
+  {"grt",	HB_TAG('G','R','O',' ')},	/* Garo */
+  {"gu",	HB_TAG('G','U','J',' ')},	/* Gujarati */
+  {"guk",	HB_TAG('G','M','Z',' ')},	/* Gumuz */
+  {"gv",	HB_TAG('M','N','X',' ')},	/* Manx Gaelic */
+  {"ha",	HB_TAG('H','A','U',' ')},	/* Hausa */
+  {"har",	HB_TAG('H','R','I',' ')},	/* Harari */
+  {"he",	HB_TAG('I','W','R',' ')},	/* Hebrew */
+  {"hi",	HB_TAG('H','I','N',' ')},	/* Hindi */
+  {"hil",	HB_TAG('H','I','L',' ')},	/* Hiligaynon */
+  {"hoc",	HB_TAG('H','O',' ',' ')},	/* Ho */
+  {"hr",	HB_TAG('H','R','V',' ')},	/* Croatian */
+  {"hsb",	HB_TAG('U','S','B',' ')},	/* Upper Sorbian */
+  {"ht",	HB_TAG('H','A','I',' ')},	/* Haitian */
+  {"hu",	HB_TAG('H','U','N',' ')},	/* Hungarian */
+  {"hy",	HB_TAG('H','Y','E',' ')},	/* Armenian */
+  {"id",	HB_TAG('I','N','D',' ')},	/* Indonesian */
+  {"ig",	HB_TAG('I','B','O',' ')},	/* Igbo */
+  {"igb",	HB_TAG('E','B','I',' ')},	/* Ebira */
+  {"inh",	HB_TAG('I','N','G',' ')},	/* Ingush */
+  {"is",	HB_TAG('I','S','L',' ')},	/* Icelandic */
+  {"it",	HB_TAG('I','T','A',' ')},	/* Italian */
+  {"iu",	HB_TAG('I','N','U',' ')},	/* Inuktitut */
+  {"ja",	HB_TAG('J','A','N',' ')},	/* Japanese */
+  {"jv",	HB_TAG('J','A','V',' ')},	/* Javanese */
+  {"ka",	HB_TAG('K','A','T',' ')},	/* Georgian */
+  {"kam",	HB_TAG('K','M','B',' ')},	/* Kamba (Kenya) */
+  {"kbd",	HB_TAG('K','A','B',' ')},	/* Kabardian */
+  {"kdr",	HB_TAG('K','R','M',' ')},	/* Karaim */
+  {"kdt",	HB_TAG('K','U','Y',' ')},	/* Kuy */
+  {"kfr",	HB_TAG('K','A','C',' ')},	/* Kachchi */
+  {"kfy",	HB_TAG('K','M','N',' ')},	/* Kumaoni */
+  {"kha",	HB_TAG('K','S','I',' ')},	/* Khasi */
+  {"khw",	HB_TAG('K','H','W',' ')},	/* Khowar */
+  {"ki",	HB_TAG('K','I','K',' ')},	/* Kikuyu */
+  {"kk",	HB_TAG('K','A','Z',' ')},	/* Kazakh */
+  {"kl",	HB_TAG('G','R','N',' ')},	/* Kalaallisut */
+  {"kln",	HB_TAG('K','A','L',' ')},	/* Kalenjin */
+  {"km",	HB_TAG('K','H','M',' ')},	/* Central Khmer */
+  {"kmw",	HB_TAG('K','M','O',' ')},	/* Komo (Democratic Republic of Congo) */
+  {"kn",	HB_TAG('K','A','N',' ')},	/* Kannada */
+  {"ko",	HB_TAG('K','O','R',' ')},	/* Korean */
+  {"koi",	HB_TAG('K','O','P',' ')},	/* Komi-Permyak */
+  {"kok",	HB_TAG('K','O','K',' ')},	/* Konkani */
+  {"kpe",	HB_TAG('K','P','L',' ')},	/* Kpelle */
+  {"kpv",	HB_TAG('K','O','Z',' ')},	/* Komi-Zyrian */
+  {"kpy",	HB_TAG('K','Y','K',' ')},	/* Koryak */
+  {"kqy",	HB_TAG('K','R','T',' ')},	/* Koorete */
+  {"kr",	HB_TAG('K','N','R',' ')},	/* Kanuri */
+  {"kri",	HB_TAG('K','R','I',' ')},	/* Krio */
+  {"krl",	HB_TAG('K','R','L',' ')},	/* Karelian */
+  {"kru",	HB_TAG('K','U','U',' ')},	/* Kurukh */
+  {"ks",	HB_TAG('K','S','H',' ')},	/* Kashmiri */
+  {"ku",	HB_TAG('K','U','R',' ')},	/* Kurdish */
+  {"kum",	HB_TAG('K','U','M',' ')},	/* Kumyk */
+  {"kvd",	HB_TAG('K','U','I',' ')},	/* Kui (Indonesia) */
+  {"kxu",	HB_TAG('K','U','I',' ')},	/* Kui (India) */
+  {"ky",	HB_TAG('K','I','R',' ')},	/* Kirghiz */
+  {"la",	HB_TAG('L','A','T',' ')},	/* Latin */
+  {"lad",	HB_TAG('J','U','D',' ')},	/* Ladino */
+  {"lb",	HB_TAG('L','T','Z',' ')},	/* Luxembourgish */
+  {"lbe",	HB_TAG('L','A','K',' ')},	/* Lak */
+  {"lbj",	HB_TAG('L','D','K',' ')},	/* Ladakhi */
+  {"lif",	HB_TAG('L','M','B',' ')},	/* Limbu */
+  {"lld",	HB_TAG('L','A','D',' ')},	/* Ladin */
+  {"ln",	HB_TAG('L','I','N',' ')},	/* Lingala */
+  {"lo",	HB_TAG('L','A','O',' ')},	/* Lao */
+  {"lt",	HB_TAG('L','T','H',' ')},	/* Lithuanian */
+  {"luo",	HB_TAG('L','U','O',' ')},	/* Luo (Kenya and Tanzania) */
+  {"luw",	HB_TAG('L','U','O',' ')},	/* Luo (Cameroon) */
+  {"lv",	HB_TAG('L','V','I',' ')},	/* Latvian */
+  {"lzz",	HB_TAG('L','A','Z',' ')},	/* Laz */
+  {"mai",	HB_TAG('M','T','H',' ')},	/* Maithili */
+  {"mdc",	HB_TAG('M','L','E',' ')},	/* Male (Papua New Guinea) */
+  {"mdf",	HB_TAG('M','O','K',' ')},	/* Moksha */
+  {"mdy",	HB_TAG('M','L','E',' ')},	/* Male (Ethiopia) */
+  {"men",	HB_TAG('M','D','E',' ')},	/* Mende (Sierra Leone) */
+  {"mg",	HB_TAG('M','L','G',' ')},	/* Malagasy */
+  {"mi",	HB_TAG('M','R','I',' ')},	/* Maori */
+  {"mk",	HB_TAG('M','K','D',' ')},	/* Macedonian */
+  {"ml",	HB_TAG('M','L','R',' ')},	/* Malayalam */
+  {"mn",	HB_TAG('M','N','G',' ')},	/* Mongolian */
+  {"mnc",	HB_TAG('M','C','H',' ')},	/* Manchu */
+  {"mni",	HB_TAG('M','N','I',' ')},	/* Manipuri */
+  {"mnk",	HB_TAG('M','N','D',' ')},	/* Mandinka */
+  {"mns",	HB_TAG('M','A','N',' ')},	/* Mansi */
+  {"mnw",	HB_TAG('M','O','N',' ')},	/* Mon */
+  {"mo",	HB_TAG('M','O','L',' ')},	/* Moldavian */
+  {"moh",	HB_TAG('M','O','H',' ')},	/* Mohawk */
+  {"mpe",	HB_TAG('M','A','J',' ')},	/* Majang */
+  {"mr",	HB_TAG('M','A','R',' ')},	/* Marathi */
+  {"ms",	HB_TAG('M','L','Y',' ')},	/* Malay */
+  {"mt",	HB_TAG('M','T','S',' ')},	/* Maltese */
+  {"mwr",	HB_TAG('M','A','W',' ')},	/* Marwari */
+  {"my",	HB_TAG('B','R','M',' ')},	/* Burmese */
+  {"mym",	HB_TAG('M','E','N',' ')},	/* Me'en */
+  {"myv",	HB_TAG('E','R','Z',' ')},	/* Erzya */
+  {"nb",	HB_TAG('N','O','R',' ')},	/* Norwegian Bokmål */
+  {"nco",	HB_TAG('S','I','B',' ')},	/* Sibe */
+  {"ne",	HB_TAG('N','E','P',' ')},	/* Nepali */
+  {"new",	HB_TAG('N','E','W',' ')},	/* Newari */
+  {"ng",	HB_TAG('N','D','G',' ')},	/* Ndonga */
+  {"ngl",	HB_TAG('L','M','W',' ')},	/* Lomwe */
+  {"niu",	HB_TAG('N','I','U',' ')},	/* Niuean */
+  {"niv",	HB_TAG('G','I','L',' ')},	/* Gilyak */
+  {"nl",	HB_TAG('N','L','D',' ')},	/* Dutch */
+  {"nn",	HB_TAG('N','Y','N',' ')},	/* Norwegian Nynorsk */
+  {"no",	HB_TAG('N','O','R',' ')},	/* Norwegian (deprecated) */
+  {"nog",	HB_TAG('N','O','G',' ')},	/* Nogai */
+  {"nqo",	HB_TAG('N','K','O',' ')},	/* N'Ko */
+  {"nsk",	HB_TAG('N','A','S',' ')},	/* Naskapi */
+  {"ny",	HB_TAG('C','H','I',' ')},	/* Nyanja */
+  {"oc",	HB_TAG('O','C','I',' ')},	/* Occitan (post 1500) */
+  {"oj",	HB_TAG('O','J','B',' ')},	/* Ojibwa */
+  {"om",	HB_TAG('O','R','O',' ')},	/* Oromo */
+  {"or",	HB_TAG('O','R','I',' ')},	/* Oriya */
+  {"os",	HB_TAG('O','S','S',' ')},	/* Ossetian */
+  {"pa",	HB_TAG('P','A','N',' ')},	/* Panjabi */
+  {"pi",	HB_TAG('P','A','L',' ')},	/* Pali */
+  {"pl",	HB_TAG('P','L','K',' ')},	/* Polish */
+  {"plp",	HB_TAG('P','A','P',' ')},	/* Palpa */
+  {"prs",	HB_TAG('D','R','I',' ')},	/* Dari */
+  {"ps",	HB_TAG('P','A','S',' ')},	/* Pushto */
+  {"pt",	HB_TAG('P','T','G',' ')},	/* Portuguese */
+  {"raj",	HB_TAG('R','A','J',' ')},	/* Rajasthani */
+  {"ria",	HB_TAG('R','I','A',' ')},	/* Riang (India) */
+  {"ril",	HB_TAG('R','I','A',' ')},	/* Riang (Myanmar) */
+  {"ro",	HB_TAG('R','O','M',' ')},	/* Romanian */
+  {"rom",	HB_TAG('R','O','Y',' ')},	/* Romany */
+  {"ru",	HB_TAG('R','U','S',' ')},	/* Russian */
+  {"rue",	HB_TAG('R','S','Y',' ')},	/* Rusyn */
+  {"sa",	HB_TAG('S','A','N',' ')},	/* Sanskrit */
+  {"sah",	HB_TAG('Y','A','K',' ')},	/* Yakut */
+  {"sat",	HB_TAG('S','A','T',' ')},	/* Santali */
+  {"sck",	HB_TAG('S','A','D',' ')},	/* Sadri */
+  {"sd",	HB_TAG('S','N','D',' ')},	/* Sindhi */
+  {"se",	HB_TAG('N','S','M',' ')},	/* Northern Sami */
+  {"seh",	HB_TAG('S','N','A',' ')},	/* Sena */
+  {"sel",	HB_TAG('S','E','L',' ')},	/* Selkup */
+  {"sg",	HB_TAG('S','G','O',' ')},	/* Sango */
+  {"shn",	HB_TAG('S','H','N',' ')},	/* Shan */
+  {"si",	HB_TAG('S','N','H',' ')},	/* Sinhala */
+  {"sid",	HB_TAG('S','I','D',' ')},	/* Sidamo */
+  {"sjd",	HB_TAG('K','S','M',' ')},	/* Kildin Sami */
+  {"sk",	HB_TAG('S','K','Y',' ')},	/* Slovak */
+  {"skr",	HB_TAG('S','R','K',' ')},	/* Seraiki */
+  {"sl",	HB_TAG('S','L','V',' ')},	/* Slovenian */
+  {"sm",	HB_TAG('S','M','O',' ')},	/* Samoan */
+  {"sma",	HB_TAG('S','S','M',' ')},	/* Southern Sami */
+  {"smj",	HB_TAG('L','S','M',' ')},	/* Lule Sami */
+  {"smn",	HB_TAG('I','S','M',' ')},	/* Inari Sami */
+  {"sms",	HB_TAG('S','K','S',' ')},	/* Skolt Sami */
+  {"snk",	HB_TAG('S','N','K',' ')},	/* Soninke */
+  {"so",	HB_TAG('S','M','L',' ')},	/* Somali */
+  {"sq",	HB_TAG('S','Q','I',' ')},	/* Albanian */
+  {"sr",	HB_TAG('S','R','B',' ')},	/* Serbian */
+  {"srr",	HB_TAG('S','R','R',' ')},	/* Serer */
+  {"suq",	HB_TAG('S','U','R',' ')},	/* Suri */
+  {"sv",	HB_TAG('S','V','E',' ')},	/* Swedish */
+  {"sva",	HB_TAG('S','V','A',' ')},	/* Svan */
+  {"sw",	HB_TAG('S','W','K',' ')},	/* Swahili */
+  {"swb",	HB_TAG('C','M','R',' ')},	/* Comorian */
+  {"syr",	HB_TAG('S','Y','R',' ')},	/* Syriac */
+  {"ta",	HB_TAG('T','A','M',' ')},	/* Tamil */
+  {"tcy",	HB_TAG('T','U','L',' ')},	/* Tulu */
+  {"te",	HB_TAG('T','E','L',' ')},	/* Telugu */
+  {"tg",	HB_TAG('T','A','J',' ')},	/* Tajik */
+  {"th",	HB_TAG('T','H','A',' ')},	/* Thai */
+  {"ti",	HB_TAG('T','G','Y',' ')},	/* Tigrinya */
+  {"tig",	HB_TAG('T','G','R',' ')},	/* Tigre */
+  {"tk",	HB_TAG('T','K','M',' ')},	/* Turkmen */
+  {"tn",	HB_TAG('T','N','A',' ')},	/* Tswana */
+  {"tnz",	HB_TAG('T','N','G',' ')},	/* Tonga (Thailand) */
+  {"to",	HB_TAG('T','N','G',' ')},	/* Tonga (Tonga Islands) */
+  {"tog",	HB_TAG('T','N','G',' ')},	/* Tonga (Nyasa) */
+  {"toi",	HB_TAG('T','N','G',' ')},	/* Tonga (Zambia) */
+  {"tr",	HB_TAG('T','R','K',' ')},	/* Turkish */
+  {"ts",	HB_TAG('T','S','G',' ')},	/* Tsonga */
+  {"tt",	HB_TAG('T','A','T',' ')},	/* Tatar */
+  {"tw",	HB_TAG('T','W','I',' ')},	/* Twi */
+  {"ty",	HB_TAG('T','H','T',' ')},	/* Tahitian */
+  {"udm",	HB_TAG('U','D','M',' ')},	/* Udmurt */
+  {"ug",	HB_TAG('U','Y','G',' ')},	/* Uighur */
+  {"uk",	HB_TAG('U','K','R',' ')},	/* Ukrainian */
+  {"unr",	HB_TAG('M','U','N',' ')},	/* Mundari */
+  {"ur",	HB_TAG('U','R','D',' ')},	/* Urdu */
+  {"uz",	HB_TAG('U','Z','B',' ')},	/* Uzbek */
+  {"ve",	HB_TAG('V','E','N',' ')},	/* Venda */
+  {"vi",	HB_TAG('V','I','T',' ')},	/* Vietnamese */
+  {"wbm",	HB_TAG('W','A',' ',' ')},	/* Wa */
+  {"wbr",	HB_TAG('W','A','G',' ')},	/* Wagdi */
+  {"wo",	HB_TAG('W','L','F',' ')},	/* Wolof */
+  {"xal",	HB_TAG('K','L','M',' ')},	/* Kalmyk */
+  {"xh",	HB_TAG('X','H','S',' ')},	/* Xhosa */
+  {"xom",	HB_TAG('K','M','O',' ')},	/* Komo (Sudan) */
+  {"xsl",	HB_TAG('S','S','L',' ')},	/* South Slavey */
+  {"yi",	HB_TAG('J','I','I',' ')},	/* Yiddish */
+  {"yo",	HB_TAG('Y','B','A',' ')},	/* Yoruba */
+  {"yso",	HB_TAG('N','I','S',' ')},	/* Nisi (China) */
+  {"zh-cn",	HB_TAG('Z','H','S',' ')},	/* Chinese (China) */
+  {"zh-hk",	HB_TAG('Z','H','H',' ')},	/* Chinese (Hong Kong) */
+  {"zh-mo",	HB_TAG('Z','H','T',' ')},	/* Chinese (Macao) */
+  {"zh-sg",	HB_TAG('Z','H','S',' ')},	/* Chinese (Singapore) */
+  {"zh-tw",	HB_TAG('Z','H','T',' ')},	/* Chinese (Taiwan) */
+  {"zne",	HB_TAG('Z','N','D',' ')},	/* Zande */
+  {"zu",	HB_TAG('Z','U','L',' ')} 	/* Zulu */
+
+  /* I couldn't find the language id for these */
+
+/*{"??",	HB_TAG('A','G','W',' ')},*/	/* Agaw */
+/*{"??",	HB_TAG('A','L','S',' ')},*/	/* Alsatian */
+/*{"??",	HB_TAG('A','L','T',' ')},*/	/* Altai */
+/*{"??",	HB_TAG('A','R','K',' ')},*/	/* Arakanese */
+/*{"??",	HB_TAG('A','T','H',' ')},*/	/* Athapaskan */
+/*{"??",	HB_TAG('B','A','G',' ')},*/	/* Baghelkhandi */
+/*{"??",	HB_TAG('B','A','L',' ')},*/	/* Balkar */
+/*{"??",	HB_TAG('B','A','U',' ')},*/	/* Baule */
+/*{"??",	HB_TAG('B','B','R',' ')},*/	/* Berber */
+/*{"??",	HB_TAG('B','C','R',' ')},*/	/* Bible Cree */
+/*{"??",	HB_TAG('B','E','L',' ')},*/	/* Belarussian */
+/*{"??",	HB_TAG('B','I','L',' ')},*/	/* Bilen */
+/*{"??",	HB_TAG('B','K','F',' ')},*/	/* Blackfoot */
+/*{"??",	HB_TAG('B','L','N',' ')},*/	/* Balante */
+/*{"??",	HB_TAG('B','M','L',' ')},*/	/* Bamileke */
+/*{"??",	HB_TAG('B','R','I',' ')},*/	/* Braj Bhasha */
+/*{"??",	HB_TAG('C','H','G',' ')},*/	/* Chaha Gurage */
+/*{"??",	HB_TAG('C','H','H',' ')},*/	/* Chattisgarhi */
+/*{"??",	HB_TAG('C','H','K',' ')},*/	/* Chukchi */
+/*{"??",	HB_TAG('D','J','R',' ')},*/	/* Djerma */
+/*{"??",	HB_TAG('D','N','G',' ')},*/	/* Dangme */
+/*{"??",	HB_TAG('E','C','R',' ')},*/	/* Eastern Cree */
+/*{"??",	HB_TAG('F','A','N',' ')},*/	/* French Antillean */
+/*{"??",	HB_TAG('F','L','E',' ')},*/	/* Flemish */
+/*{"??",	HB_TAG('F','N','E',' ')},*/	/* Forest Nenets */
+/*{"??",	HB_TAG('F','T','A',' ')},*/	/* Futa */
+/*{"??",	HB_TAG('G','A','R',' ')},*/	/* Garshuni */
+/*{"??",	HB_TAG('G','E','Z',' ')},*/	/* Ge'ez */
+/*{"??",	HB_TAG('H','A','L',' ')},*/	/* Halam */
+/*{"??",	HB_TAG('H','A','R',' ')},*/	/* Harauti */
+/*{"??",	HB_TAG('H','A','W',' ')},*/	/* Hawaiin */
+/*{"??",	HB_TAG('H','B','N',' ')},*/	/* Hammer-Banna */
+/*{"??",	HB_TAG('H','M','A',' ')},*/	/* High Mari */
+/*{"??",	HB_TAG('H','N','D',' ')},*/	/* Hindko */
+/*{"??",	HB_TAG('I','J','O',' ')},*/	/* Ijo */
+/*{"??",	HB_TAG('I','L','O',' ')},*/	/* Ilokano */
+/*{"??",	HB_TAG('I','R','T',' ')},*/	/* Irish Traditional */
+/*{"??",	HB_TAG('J','U','L',' ')},*/	/* Jula */
+/*{"??",	HB_TAG('K','A','R',' ')},*/	/* Karachay */
+/*{"??",	HB_TAG('K','E','B',' ')},*/	/* Kebena */
+/*{"??",	HB_TAG('K','G','E',' ')},*/	/* Khutsuri Georgian */
+/*{"??",	HB_TAG('K','H','A',' ')},*/	/* Khakass */
+/*{"??",	HB_TAG('K','H','K',' ')},*/	/* Khanty-Kazim */
+/*{"??",	HB_TAG('K','H','S',' ')},*/	/* Khanty-Shurishkar */
+/*{"??",	HB_TAG('K','H','V',' ')},*/	/* Khanty-Vakhi */
+/*{"??",	HB_TAG('K','I','S',' ')},*/	/* Kisii */
+/*{"??",	HB_TAG('K','K','N',' ')},*/	/* Kokni */
+/*{"??",	HB_TAG('K','M','S',' ')},*/	/* Komso */
+/*{"??",	HB_TAG('K','O','D',' ')},*/	/* Kodagu */
+/*{"??",	HB_TAG('K','O','H',' ')},*/	/* Korean Old Hangul */
+/*{"??",	HB_TAG('K','O','N',' ')},*/	/* Kikongo */
+/*{"??",	HB_TAG('K','R','K',' ')},*/	/* Karakalpak */
+/*{"??",	HB_TAG('K','R','N',' ')},*/	/* Karen */
+/*{"??",	HB_TAG('K','U','L',' ')},*/	/* Kulvi */
+/*{"??",	HB_TAG('L','A','H',' ')},*/	/* Lahuli */
+/*{"??",	HB_TAG('L','A','M',' ')},*/	/* Lambani */
+/*{"??",	HB_TAG('L','C','R',' ')},*/	/* L-Cree */
+/*{"??",	HB_TAG('L','E','Z',' ')},*/	/* Lezgi */
+/*{"??",	HB_TAG('L','M','A',' ')},*/	/* Low Mari */
+/*{"??",	HB_TAG('L','U','B',' ')},*/	/* Luba */
+/*{"??",	HB_TAG('L','U','G',' ')},*/	/* Luganda */
+/*{"??",	HB_TAG('L','U','H',' ')},*/	/* Luhya */
+/*{"??",	HB_TAG('M','A','K',' ')},*/	/* Makua */
+/*{"??",	HB_TAG('M','A','L',' ')},*/	/* Malayalam Traditional */
+/*{"??",	HB_TAG('M','B','N',' ')},*/	/* Mbundu */
+/*{"??",	HB_TAG('M','I','Z',' ')},*/	/* Mizo */
+/*{"??",	HB_TAG('M','L','N',' ')},*/	/* Malinke */
+/*{"??",	HB_TAG('M','N','K',' ')},*/	/* Maninka */
+/*{"??",	HB_TAG('M','O','R',' ')},*/	/* Moroccan */
+/*{"??",	HB_TAG('N','A','G',' ')},*/	/* Naga-Assamese */
+/*{"??",	HB_TAG('N','C','R',' ')},*/	/* N-Cree */
+/*{"??",	HB_TAG('N','D','B',' ')},*/	/* Ndebele */
+/*{"??",	HB_TAG('N','G','R',' ')},*/	/* Nagari */
+/*{"??",	HB_TAG('N','H','C',' ')},*/	/* Norway House Cree */
+/*{"??",	HB_TAG('N','K','L',' ')},*/	/* Nkole */
+/*{"??",	HB_TAG('N','T','A',' ')},*/	/* Northern Tai */
+/*{"??",	HB_TAG('O','C','R',' ')},*/	/* Oji-Cree */
+/*{"??",	HB_TAG('P','A','A',' ')},*/	/* Palestinian Aramaic */
+/*{"??",	HB_TAG('P','G','R',' ')},*/	/* Polytonic Greek */
+/*{"??",	HB_TAG('P','L','G',' ')},*/	/* Palaung */
+/*{"??",	HB_TAG('Q','I','N',' ')},*/	/* Chin */
+/*{"??",	HB_TAG('R','B','U',' ')},*/	/* Russian Buriat */
+/*{"??",	HB_TAG('R','C','R',' ')},*/	/* R-Cree */
+/*{"??",	HB_TAG('R','M','S',' ')},*/	/* Rhaeto-Romanic */
+/*{"??",	HB_TAG('R','U','A',' ')},*/	/* Ruanda */
+/*{"??",	HB_TAG('S','A','Y',' ')},*/	/* Sayisi */
+/*{"??",	HB_TAG('S','E','K',' ')},*/	/* Sekota */
+/*{"??",	HB_TAG('S','I','G',' ')},*/	/* Silte Gurage */
+/*{"??",	HB_TAG('S','L','A',' ')},*/	/* Slavey */
+/*{"??",	HB_TAG('S','O','G',' ')},*/	/* Sodo Gurage */
+/*{"??",	HB_TAG('S','O','T',' ')},*/	/* Sotho */
+/*{"??",	HB_TAG('S','W','A',' ')},*/	/* Swadaya Aramaic */
+/*{"??",	HB_TAG('S','W','Z',' ')},*/	/* Swazi */
+/*{"??",	HB_TAG('S','X','T',' ')},*/	/* Sutu */
+/*{"??",	HB_TAG('T','A','B',' ')},*/	/* Tabasaran */
+/*{"??",	HB_TAG('T','C','R',' ')},*/	/* TH-Cree */
+/*{"??",	HB_TAG('T','G','N',' ')},*/	/* Tongan */
+/*{"??",	HB_TAG('T','M','N',' ')},*/	/* Temne */
+/*{"??",	HB_TAG('T','N','E',' ')},*/	/* Tundra Nenets */
+/*{"??",	HB_TAG('T','O','D',' ')},*/	/* Todo */
+/*{"??",	HB_TAG('T','U','A',' ')},*/	/* Turoyo Aramaic */
+/*{"??",	HB_TAG('T','U','V',' ')},*/	/* Tuvin */
+/*{"??",	HB_TAG('W','C','R',' ')},*/	/* West-Cree */
+/*{"??",	HB_TAG('X','B','D',' ')},*/	/* Tai Lue */
+/*{"??",	HB_TAG('Y','C','R',' ')},*/	/* Y-Cree */
+/*{"??",	HB_TAG('Y','I','C',' ')},*/	/* Yi Classic */
+/*{"??",	HB_TAG('Y','I','M',' ')},*/	/* Yi Modern */
+/*{"??",	HB_TAG('Z','H','P',' ')},*/	/* Chinese Phonetic */
+};
+
+static int
+lang_compare_first_component (const char *a,
+			      const char *b)
+{
+  unsigned int da, db;
+  const char *p;
+
+  p = strstr (a, "-");
+  da = p ? (unsigned int) (p - a) : strlen (a);
+
+  p = strstr (b, "-");
+  db = p ? (unsigned int) (p - b) : strlen (b);
+
+  return strncmp (a, b, MAX (da, db));
+}
+
+static hb_bool_t
+lang_matches (const char *lang_str, const char *spec)
+{
+  unsigned int len = strlen (spec);
+
+  return lang_str && strncmp (lang_str, spec, len) == 0 &&
+	 (lang_str[len] == '\0' || lang_str[len] == '-');
+}
+
+hb_tag_t
+hb_ot_tag_from_language (hb_language_t language)
+{
+  const char *lang_str;
+  LangTag *lang_tag;
+
+  if (language == NULL)
+    return HB_OT_TAG_DEFAULT_LANGUAGE;
+
+  lang_str = hb_language_to_string (language);
+
+  if (0 == strcmp (lang_str, "x-hbot")) {
+    char tag[4];
+    int i;
+    lang_str += 6;
+#define IS_LETTER(c) (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
+#define TO_UPPER(c) (((c) >= 'a' && (c) <= 'z') ? (c) + 'A' - 'a' : (c))
+    for (i = 0; i < 4 && IS_LETTER (lang_str[i]); i++)
+      tag[i] = TO_UPPER (lang_str[i]);
+    for (; i < 4; i++)
+      tag[i] = ' ';
+    return HB_TAG_STR (tag);
+  }
+
+  /* find a language matching in the first component */
+  lang_tag = bsearch (lang_str, ot_languages,
+		      ARRAY_LENGTH (ot_languages), sizeof (LangTag),
+		      (hb_compare_func_t) lang_compare_first_component);
+
+  /* we now need to find the best language matching */
+  if (lang_tag)
+  {
+    hb_bool_t found = FALSE;
+
+    /* go to the final one matching in the first component */
+    while (lang_tag + 1 < ot_languages + ARRAY_LENGTH (ot_languages) &&
+	   lang_compare_first_component (lang_str, (lang_tag + 1)->language) == 0)
+      lang_tag++;
+
+    /* go back, find which one matches completely */
+    while (lang_tag >= ot_languages &&
+	   lang_compare_first_component (lang_str, lang_tag->language) == 0)
+    {
+      if (lang_matches (lang_str, lang_tag->language)) {
+	found = TRUE;
+	break;
+      }
+
+      lang_tag--;
+    }
+
+    if (!found)
+      lang_tag = NULL;
+  }
+
+  if (lang_tag)
+    return lang_tag->tag;
+
+  return HB_OT_TAG_DEFAULT_LANGUAGE;
+}
+
+hb_language_t
+hb_ot_tag_to_language (hb_tag_t tag)
+{
+  unsigned int i;
+  unsigned char buf[11] = "x-hbot";
+
+  for (i = 0; i < ARRAY_LENGTH (ot_languages); i++)
+    if (ot_languages[i].tag == tag)
+      return hb_language_from_string (ot_languages[i].language);
+
+  buf[6] = tag >> 24;
+  buf[7] = (tag >> 16) & 0xFF;
+  buf[8] = (tag >> 8) & 0xFF;
+  buf[9] = tag & 0xFF;
+  buf[10] = '\0';
+  return hb_language_from_string ((char *) buf);
+}
+
+
+HB_END_DECLS