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      1 /*
      2  * Copyright  2009  Red Hat, Inc.
      3  * Copyright  2011  Google, Inc.
      4  *
      5  *  This is part of HarfBuzz, a text shaping library.
      6  *
      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.
     12  *
     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
     17  * DAMAGE.
     18  *
     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.
     24  *
     25  * Red Hat Author(s): Behdad Esfahbod
     26  * Google Author(s): Behdad Esfahbod, Roozbeh Pournader
     27  */
     28 
     29 #include "hb-private.hh"
     30 
     31 
     32 /* hb_script_t */
     33 
     34 static hb_tag_t
     35 hb_ot_old_tag_from_script (hb_script_t script)
     36 {
     37   /* This seems to be accurate as of end of 2012. */
     38 
     39   switch ((hb_tag_t) script) {
     40     case HB_SCRIPT_INVALID:		return HB_OT_TAG_DEFAULT_SCRIPT;
     41 
     42     /* KATAKANA and HIRAGANA both map to 'kana' */
     43     case HB_SCRIPT_HIRAGANA:		return HB_TAG('k','a','n','a');
     44 
     45     /* Spaces at the end are preserved, unlike ISO 15924 */
     46     case HB_SCRIPT_LAO:			return HB_TAG('l','a','o',' ');
     47     case HB_SCRIPT_YI:			return HB_TAG('y','i',' ',' ');
     48     /* Unicode-5.0 additions */
     49     case HB_SCRIPT_NKO:			return HB_TAG('n','k','o',' ');
     50     /* Unicode-5.1 additions */
     51     case HB_SCRIPT_VAI:			return HB_TAG('v','a','i',' ');
     52     /* Unicode-5.2 additions */
     53     /* Unicode-6.0 additions */
     54   }
     55 
     56   /* Else, just change first char to lowercase and return */
     57   return ((hb_tag_t) script) | 0x20000000u;
     58 }
     59 
     60 static hb_script_t
     61 hb_ot_old_tag_to_script (hb_tag_t tag)
     62 {
     63   if (unlikely (tag == HB_OT_TAG_DEFAULT_SCRIPT))
     64     return HB_SCRIPT_INVALID;
     65 
     66   /* This side of the conversion is fully algorithmic. */
     67 
     68   /* Any spaces at the end of the tag are replaced by repeating the last
     69    * letter.  Eg 'nko ' -> 'Nkoo' */
     70   if (unlikely ((tag & 0x0000FF00u) == 0x00002000u))
     71     tag |= (tag >> 8) & 0x0000FF00u; /* Copy second letter to third */
     72   if (unlikely ((tag & 0x000000FFu) == 0x00000020u))
     73     tag |= (tag >> 8) & 0x000000FFu; /* Copy third letter to fourth */
     74 
     75   /* Change first char to uppercase and return */
     76   return (hb_script_t) (tag & ~0x20000000u);
     77 }
     78 
     79 static hb_tag_t
     80 hb_ot_new_tag_from_script (hb_script_t script)
     81 {
     82   switch ((hb_tag_t) script) {
     83     case HB_SCRIPT_BENGALI:		return HB_TAG('b','n','g','2');
     84     case HB_SCRIPT_DEVANAGARI:		return HB_TAG('d','e','v','2');
     85     case HB_SCRIPT_GUJARATI:		return HB_TAG('g','j','r','2');
     86     case HB_SCRIPT_GURMUKHI:		return HB_TAG('g','u','r','2');
     87     case HB_SCRIPT_KANNADA:		return HB_TAG('k','n','d','2');
     88     case HB_SCRIPT_MALAYALAM:		return HB_TAG('m','l','m','2');
     89     case HB_SCRIPT_ORIYA:		return HB_TAG('o','r','y','2');
     90     case HB_SCRIPT_TAMIL:		return HB_TAG('t','m','l','2');
     91     case HB_SCRIPT_TELUGU:		return HB_TAG('t','e','l','2');
     92     case HB_SCRIPT_MYANMAR:		return HB_TAG('m','y','m','2');
     93   }
     94 
     95   return HB_OT_TAG_DEFAULT_SCRIPT;
     96 }
     97 
     98 static hb_script_t
     99 hb_ot_new_tag_to_script (hb_tag_t tag)
    100 {
    101   switch (tag) {
    102     case HB_TAG('b','n','g','2'):	return HB_SCRIPT_BENGALI;
    103     case HB_TAG('d','e','v','2'):	return HB_SCRIPT_DEVANAGARI;
    104     case HB_TAG('g','j','r','2'):	return HB_SCRIPT_GUJARATI;
    105     case HB_TAG('g','u','r','2'):	return HB_SCRIPT_GURMUKHI;
    106     case HB_TAG('k','n','d','2'):	return HB_SCRIPT_KANNADA;
    107     case HB_TAG('m','l','m','2'):	return HB_SCRIPT_MALAYALAM;
    108     case HB_TAG('o','r','y','2'):	return HB_SCRIPT_ORIYA;
    109     case HB_TAG('t','m','l','2'):	return HB_SCRIPT_TAMIL;
    110     case HB_TAG('t','e','l','2'):	return HB_SCRIPT_TELUGU;
    111     case HB_TAG('m','y','m','2'):	return HB_SCRIPT_MYANMAR;
    112   }
    113 
    114   return HB_SCRIPT_UNKNOWN;
    115 }
    116 
    117 /*
    118  * Complete list at:
    119  * https://www.microsoft.com/typography/otspec/scripttags.htm
    120  * https://www.microsoft.com/typography/otspec160/scripttagsProposed.htm
    121  *
    122  * Most of the script tags are the same as the ISO 15924 tag but lowercased.
    123  * So we just do that, and handle the exceptional cases in a switch.
    124  */
    125 
    126 void
    127 hb_ot_tags_from_script (hb_script_t  script,
    128 			hb_tag_t    *script_tag_1,
    129 			hb_tag_t    *script_tag_2)
    130 {
    131   hb_tag_t new_tag;
    132 
    133   *script_tag_2 = HB_OT_TAG_DEFAULT_SCRIPT;
    134   *script_tag_1 = hb_ot_old_tag_from_script (script);
    135 
    136   new_tag = hb_ot_new_tag_from_script (script);
    137   if (unlikely (new_tag != HB_OT_TAG_DEFAULT_SCRIPT)) {
    138     *script_tag_2 = *script_tag_1;
    139     *script_tag_1 = new_tag;
    140   }
    141 }
    142 
    143 hb_script_t
    144 hb_ot_tag_to_script (hb_tag_t tag)
    145 {
    146   if (unlikely ((tag & 0x000000FFu) == '2'))
    147     return hb_ot_new_tag_to_script (tag);
    148 
    149   return hb_ot_old_tag_to_script (tag);
    150 }
    151 
    152 
    153 /* hb_language_t */
    154 
    155 typedef struct {
    156   char language[4];
    157   hb_tag_t tag;
    158 } LangTag;
    159 
    160 /*
    161  * Complete list at:
    162  * http://www.microsoft.com/typography/otspec/languagetags.htm
    163  *
    164  * Generated by intersecting the OpenType language tag list from
    165  * Draft OpenType 1.5 spec, with with the ISO 639-3 codes from
    166  * 2008-08-04, matching on name, and finally adjusted manually.
    167  *
    168  * Updated on 2012-12-07 with more research into remaining codes.
    169  *
    170  * Updated on 2013-11-23 based on usage in SIL and Microsoft fonts,
    171  * the new proposal from Microsoft, and latest ISO 639-3 names.
    172  *
    173  * Some items still missing.  Those are commented out at the end.
    174  * Keep sorted for bsearch.
    175  *
    176  * Updated as of 2015-05-06: OT1.7 on MS website has some newer
    177  * items that we don't have here, eg. Zazaki.  This is the new
    178  * items in OpenType 1.7 (red items), most of which we have:
    179  * http://www.microsoft.com/typography/otspec170/languagetags.htm
    180  */
    181 
    182 static const LangTag ot_languages[] = {
    183   {"aa",	HB_TAG('A','F','R',' ')},	/* Afar */
    184   {"ab",	HB_TAG('A','B','K',' ')},	/* Abkhazian */
    185   {"abq",	HB_TAG('A','B','A',' ')},	/* Abaza */
    186   {"acf",	HB_TAG('F','A','N',' ')},	/* French Antillean */
    187   {"ach",	HB_TAG('A','C','H',' ')},	/* Acoli */
    188   {"acr",	HB_TAG('A','C','R',' ')},	/* Achi */
    189   {"ada",	HB_TAG('D','N','G',' ')},	/* Dangme */
    190   {"ady",	HB_TAG('A','D','Y',' ')},	/* Adyghe */
    191   {"af",	HB_TAG('A','F','K',' ')},	/* Afrikaans */
    192   {"ahg",	HB_TAG('A','G','W',' ')},	/* Agaw */
    193   {"aii",	HB_TAG('S','W','A',' ')},	/* Swadaya Aramaic */
    194   {"aio",	HB_TAG('A','I','O',' ')},	/* Aiton */
    195   {"aiw",	HB_TAG('A','R','I',' ')},	/* Aari */
    196   {"ak",	HB_TAG('T','W','I',' ')},	/* Akan [macrolanguage] */
    197   {"aka",	HB_TAG('A','K','A',' ')},	/* Akan */
    198   {"alt",	HB_TAG('A','L','T',' ')},	/* [Southern] Altai */
    199   {"am",	HB_TAG('A','M','H',' ')},	/* Amharic */
    200   {"amf",	HB_TAG('H','B','N',' ')},	/* Hammer-Banna */
    201   {"amw",	HB_TAG('S','Y','R',' ')},	/* Western Neo-Aramaic */
    202   {"an",	HB_TAG('A','R','G',' ')},	/* Aragonese */
    203   {"ang",	HB_TAG('A','N','G',' ')},	/* Old English (ca. 450-1100) */
    204   {"ar",	HB_TAG('A','R','A',' ')},	/* Arabic [macrolanguage] */
    205   {"arb",	HB_TAG('A','R','A',' ')},	/* Standard Arabic */
    206   {"arn",	HB_TAG('M','A','P',' ')},	/* Mapudungun */
    207   {"ary",	HB_TAG('M','O','R',' ')},	/* Moroccan Arabic */
    208   {"as",	HB_TAG('A','S','M',' ')},	/* Assamese */
    209   {"ast",	HB_TAG('A','S','T',' ')},	/* Asturian/Asturleonese/Bable/Leonese */
    210   {"ath",	HB_TAG('A','T','H',' ')},	/* Athapaskan [family] */
    211   {"atj",	HB_TAG('R','C','R',' ')},	/* R-Cree */
    212   {"atv",	HB_TAG('A','L','T',' ')},	/* [Northern] Altai */
    213   {"av",	HB_TAG('A','V','R',' ')},	/* Avaric */
    214   {"awa",	HB_TAG('A','W','A',' ')},	/* Awadhi */
    215   {"ay",	HB_TAG('A','Y','M',' ')},	/* Aymara [macrolanguage] */
    216   {"az",	HB_TAG('A','Z','E',' ')},	/* Azerbaijani [macrolanguage] */
    217   {"azb",	HB_TAG('A','Z','B',' ')},	/* South Azerbaijani */
    218   {"azj",	HB_TAG('A','Z','E',' ')},	/* North Azerbaijani */
    219   {"ba",	HB_TAG('B','S','H',' ')},	/* Bashkir */
    220   {"bad",	HB_TAG('B','A','D','0')},	/* Banda */
    221   {"bai",	HB_TAG('B','M','L',' ')},	/* Bamileke [family] */
    222   {"bal",	HB_TAG('B','L','I',' ')},	/* Baluchi [macrolangauge] */
    223   {"ban",	HB_TAG('B','A','N',' ')},	/* Balinese */
    224   {"bar",	HB_TAG('B','A','R',' ')},	/* Bavarian */
    225   {"bbc",	HB_TAG('B','B','C',' ')},	/* Batak Toba */
    226   {"bci",	HB_TAG('B','A','U',' ')},	/* Baoul */
    227   {"bcl",	HB_TAG('B','I','K',' ')},	/* Central Bikol */
    228   {"bcq",	HB_TAG('B','C','H',' ')},	/* Bench */
    229   {"bdy",	HB_TAG('B','D','Y',' ')},	/* Bandjalang */
    230   {"be",	HB_TAG('B','E','L',' ')},	/* Belarusian */
    231   {"bem",	HB_TAG('B','E','M',' ')},	/* Bemba (Zambia) */
    232   {"ber",	HB_TAG('B','E','R',' ')},	/* Berber [family] */
    233   {"bfq",	HB_TAG('B','A','D',' ')},	/* Badaga */
    234   {"bft",	HB_TAG('B','L','T',' ')},	/* Balti */
    235   {"bfu",	HB_TAG('L','A','H',' ')},	/* Lahuli */
    236   {"bfy",	HB_TAG('B','A','G',' ')},	/* Baghelkhandi */
    237   {"bg",	HB_TAG('B','G','R',' ')},	/* Bulgarian */
    238   {"bgc",	HB_TAG('B','G','C',' ')},	/* Haryanvi */
    239   {"bgq",	HB_TAG('B','G','Q',' ')},	/* Bagri */
    240   {"bgr",	HB_TAG('Q','I','N',' ')},	/* Bawm Chin */
    241   {"bhb",	HB_TAG('B','H','I',' ')},	/* Bhili */
    242   {"bhk",	HB_TAG('B','I','K',' ')},	/* Albay Bicolano (retired code) */
    243   {"bho",	HB_TAG('B','H','O',' ')},	/* Bhojpuri */
    244   {"bi",	HB_TAG('B','I','S',' ')},	/* Bislama */
    245   {"bik",	HB_TAG('B','I','K',' ')},	/* Bikol [macrolanguage] */
    246   {"bin",	HB_TAG('E','D','O',' ')},	/* Bini */
    247   {"bjj",	HB_TAG('B','J','J',' ')},	/* Kanauji */
    248   {"bjt",	HB_TAG('B','L','N',' ')},	/* Balanta-Ganja */
    249   {"bla",	HB_TAG('B','K','F',' ')},	/* Blackfoot */
    250   {"ble",	HB_TAG('B','L','N',' ')},	/* Balanta-Kentohe */
    251   {"blk",	HB_TAG('B','L','K',' ')},	/* Pa'O/Pa'o Karen */
    252   {"bln",	HB_TAG('B','I','K',' ')},	/* Southern Catanduanes Bikol */
    253   {"bm",	HB_TAG('B','M','B',' ')},	/* Bambara */
    254   {"bn",	HB_TAG('B','E','N',' ')},	/* Bengali */
    255   {"bo",	HB_TAG('T','I','B',' ')},	/* Tibetan */
    256   {"bpy",	HB_TAG('B','P','Y',' ')},	/* Bishnupriya */
    257   {"bqi",	HB_TAG('L','R','C',' ')},	/* Bakhtiari */
    258   {"br",	HB_TAG('B','R','E',' ')},	/* Breton */
    259   {"bra",	HB_TAG('B','R','I',' ')},	/* Braj Bhasha */
    260   {"brh",	HB_TAG('B','R','H',' ')},	/* Brahui */
    261   {"brx",	HB_TAG('B','R','X',' ')},	/* Bodo (India) */
    262   {"bs",	HB_TAG('B','O','S',' ')},	/* Bosnian */
    263   {"btb",	HB_TAG('B','T','I',' ')},	/* Beti (Cameroon) */
    264   {"bto",	HB_TAG('B','I','K',' ')},	/* Rinconada Bikol */
    265   {"bts",	HB_TAG('B','T','S',' ')},	/* Batak Simalungun */
    266   {"bug",	HB_TAG('B','U','G',' ')},	/* Buginese */
    267   {"bxr",	HB_TAG('R','B','U',' ')},	/* Russian Buriat */
    268   {"byn",	HB_TAG('B','I','L',' ')},	/* Bilen */
    269   {"ca",	HB_TAG('C','A','T',' ')},	/* Catalan */
    270   {"cak",	HB_TAG('C','A','K',' ')},	/* Kaqchikel */
    271   {"cbk",	HB_TAG('C','B','K',' ')},	/* Chavacano */
    272   {"cbl",	HB_TAG('Q','I','N',' ')},	/* Bualkhaw Chin */
    273   {"cco",	HB_TAG('C','C','H','N')},	/* Chinantec */
    274   {"ce",	HB_TAG('C','H','E',' ')},	/* Chechen */
    275   {"ceb",	HB_TAG('C','E','B',' ')},	/* Cebuano */
    276   {"cfm",	HB_TAG('H','A','L',' ')},	/* Halam/Falam Chin */
    277   {"cgg",	HB_TAG('C','G','G',' ')},	/* Chiga */
    278   {"ch",	HB_TAG('C','H','A',' ')},	/* Chamorro */
    279   {"chj",	HB_TAG('C','C','H','N')},	/* Chinantec */
    280   {"chk",	HB_TAG('C','H','K','0')},	/* Chuukese */
    281   {"cho",	HB_TAG('C','H','O',' ')},	/* Choctaw */
    282   {"chp",	HB_TAG('C','H','P',' ')},	/* Chipewyan */
    283   {"chq",	HB_TAG('C','C','H','N')},	/* Chinantec */
    284   {"chr",	HB_TAG('C','H','R',' ')},	/* Cherokee */
    285   {"chy",	HB_TAG('C','H','Y',' ')},	/* Cheyenne */
    286   {"chz",	HB_TAG('C','C','H','N')},	/* Chinantec */
    287   {"cja",	HB_TAG('C','J','A',' ')},	/* Western Cham */
    288   {"cjm",	HB_TAG('C','J','M',' ')},	/* Eastern Cham */
    289   {"cka",	HB_TAG('Q','I','N',' ')},	/* Khumi Awa Chin */
    290   {"ckb",	HB_TAG('K','U','R',' ')},	/* Central Kurdish (Sorani) */
    291   {"ckt",	HB_TAG('C','H','K',' ')},	/* Chukchi */
    292   {"cld",	HB_TAG('S','Y','R',' ')},	/* Chaldean Neo-Aramaic */
    293   {"cle",	HB_TAG('C','C','H','N')},	/* Chinantec */
    294   {"cmr",	HB_TAG('Q','I','N',' ')},	/* Mro-Khimi Chin */
    295   {"cnb",	HB_TAG('Q','I','N',' ')},	/* Chinbon Chin */
    296   {"cnh",	HB_TAG('Q','I','N',' ')},	/* Hakha Chin */
    297   {"cnk",	HB_TAG('Q','I','N',' ')},	/* Khumi Chin */
    298   {"cnl",	HB_TAG('C','C','H','N')},	/* Chinantec */
    299   {"cnt",	HB_TAG('C','C','H','N')},	/* Chinantec */
    300   {"cnw",	HB_TAG('Q','I','N',' ')},	/* Ngawn Chin */
    301   {"cop",	HB_TAG('C','O','P',' ')},	/* Coptic */
    302   {"cpa",	HB_TAG('C','C','H','N')},	/* Chinantec */
    303   {"cpp",	HB_TAG('C','P','P',' ')},	/* Creoles */
    304   {"cr",	HB_TAG('C','R','E',' ')},	/* Cree */
    305   {"cre",	HB_TAG('Y','C','R',' ')},	/* Y-Cree */
    306   {"crh",	HB_TAG('C','R','T',' ')},	/* Crimean Tatar */
    307   {"crj",	HB_TAG('E','C','R',' ')},	/* [Southern] East Cree */
    308   {"crk",	HB_TAG('W','C','R',' ')},	/* West-Cree */
    309   {"crl",	HB_TAG('E','C','R',' ')},	/* [Northern] East Cree */
    310   {"crm",	HB_TAG('M','C','R',' ')},	/* Moose Cree */
    311   {"crx",	HB_TAG('C','R','R',' ')},	/* Carrier */
    312   {"cs",	HB_TAG('C','S','Y',' ')},	/* Czech */
    313   {"csa",	HB_TAG('C','C','H','N')},	/* Chinantec */
    314   {"csb",	HB_TAG('C','S','B',' ')},	/* Kashubian */
    315   {"csh",	HB_TAG('Q','I','N',' ')},	/* Asho Chin */
    316   {"cso",	HB_TAG('C','C','H','N')},	/* Chinantec */
    317   {"csy",	HB_TAG('Q','I','N',' ')},	/* Siyin Chin */
    318   {"ctd",	HB_TAG('Q','I','N',' ')},	/* Tedim Chin */
    319   {"cte",	HB_TAG('C','C','H','N')},	/* Chinantec */
    320   {"ctg",	HB_TAG('C','T','G',' ')},	/* Chittagonian */
    321   {"ctl",	HB_TAG('C','C','H','N')},	/* Chinantec */
    322   {"cts",	HB_TAG('B','I','K',' ')},	/* Northern Catanduanes Bikol */
    323   {"cu",	HB_TAG('C','S','L',' ')},	/* Church Slavic */
    324   {"cuc",	HB_TAG('C','C','H','N')},	/* Chinantec */
    325   {"cuk",	HB_TAG('C','U','K',' ')},	/* San Blas Kuna */
    326   {"cv",	HB_TAG('C','H','U',' ')},	/* Chuvash */
    327   {"cvn",	HB_TAG('C','C','H','N')},	/* Chinantec */
    328   {"cwd",	HB_TAG('D','C','R',' ')},	/* Woods Cree */
    329   {"cy",	HB_TAG('W','E','L',' ')},	/* Welsh */
    330   {"czt",	HB_TAG('Q','I','N',' ')},	/* Zotung Chin */
    331   {"da",	HB_TAG('D','A','N',' ')},	/* Danish */
    332   {"dao",	HB_TAG('Q','I','N',' ')},	/* Daai Chin */
    333   {"dap",	HB_TAG('N','I','S',' ')},	/* Nisi (India) */
    334   {"dar",	HB_TAG('D','A','R',' ')},	/* Dargwa */
    335   {"dax",	HB_TAG('D','A','X',' ')},	/* Dayi */
    336   {"de",	HB_TAG('D','E','U',' ')},	/* German */
    337   {"dgo",	HB_TAG('D','G','O',' ')},	/* Dogri */
    338   {"dhd",	HB_TAG('M','A','W',' ')},	/* Dhundari */
    339   {"dhg",	HB_TAG('D','H','G',' ')},	/* Dhangu */
    340   {"din",	HB_TAG('D','N','K',' ')},	/* Dinka [macrolanguage] */
    341   {"diq",	HB_TAG('D','I','Q',' ')},	/* Dimli */
    342   {"dje",	HB_TAG('D','J','R',' ')},	/* Zarma */
    343   {"djr",	HB_TAG('D','J','R','0')},	/* Djambarrpuyngu */
    344   {"dng",	HB_TAG('D','U','N',' ')},	/* Dungan */
    345   {"dnj",	HB_TAG('D','N','J',' ')},	/* Dan */
    346   {"doi",	HB_TAG('D','G','R',' ')},	/* Dogri [macrolanguage] */
    347   {"dsb",	HB_TAG('L','S','B',' ')},	/* Lower Sorbian */
    348   {"duj",	HB_TAG('D','U','J',' ')},	/* Dhuwal */
    349   {"dv",	HB_TAG('D','I','V',' ')},	/* Dhivehi/Divehi/Maldivian */
    350   {"dyu",	HB_TAG('J','U','L',' ')},	/* Jula */
    351   {"dz",	HB_TAG('D','Z','N',' ')},	/* Dzongkha */
    352   {"ee",	HB_TAG('E','W','E',' ')},	/* Ewe */
    353   {"efi",	HB_TAG('E','F','I',' ')},	/* Efik */
    354   {"ekk",	HB_TAG('E','T','I',' ')},	/* Standard Estonian */
    355   {"el",	HB_TAG('E','L','L',' ')},	/* Modern Greek (1453-) */
    356   {"emk",	HB_TAG('M','N','K',' ')},	/* Eastern Maninkakan */
    357   {"en",	HB_TAG('E','N','G',' ')},	/* English */
    358   {"enf",	HB_TAG('F','N','E',' ')},	/* Forest Nenets */
    359   {"enh",	HB_TAG('T','N','E',' ')},	/* Tundra Nenets */
    360   {"eo",	HB_TAG('N','T','O',' ')},	/* Esperanto */
    361   {"eot",	HB_TAG('B','T','I',' ')},	/* Beti (Cte d'Ivoire) */
    362   {"es",	HB_TAG('E','S','P',' ')},	/* Spanish */
    363   {"esu",	HB_TAG('E','S','U',' ')},	/* Central Yupik */
    364   {"et",	HB_TAG('E','T','I',' ')},	/* Estonian [macrolanguage] */
    365   {"eu",	HB_TAG('E','U','Q',' ')},	/* Basque */
    366   {"eve",	HB_TAG('E','V','N',' ')},	/* Even */
    367   {"evn",	HB_TAG('E','V','K',' ')},	/* Evenki */
    368   {"fa",	HB_TAG('F','A','R',' ')},	/* Persian [macrolanguage] */
    369   {"fan",	HB_TAG('F','A','N','0')},	/* Fang */
    370   {"fat",	HB_TAG('F','A','T',' ')},	/* Fanti */
    371   {"ff",	HB_TAG('F','U','L',' ')},	/* Fulah [macrolanguage] */
    372   {"fi",	HB_TAG('F','I','N',' ')},	/* Finnish */
    373   {"fil",	HB_TAG('P','I','L',' ')},	/* Filipino */
    374   {"fj",	HB_TAG('F','J','I',' ')},	/* Fijian */
    375   {"flm",	HB_TAG('H','A','L',' ')},	/* Halam/Falam Chin [retired ISO639 code] */
    376   {"fo",	HB_TAG('F','O','S',' ')},	/* Faroese */
    377   {"fon",	HB_TAG('F','O','N',' ')},	/* Fon */
    378   {"fr",	HB_TAG('F','R','A',' ')},	/* French */
    379   {"frc",	HB_TAG('F','R','C',' ')},	/* Cajun French */
    380   {"frp",	HB_TAG('F','R','P',' ')},	/* Arpitan/Francoprovenal */
    381   {"fuf",	HB_TAG('F','T','A',' ')},	/* Futa */
    382   {"fur",	HB_TAG('F','R','L',' ')},	/* Friulian */
    383   {"fuv",	HB_TAG('F','U','V',' ')},	/* Nigerian Fulfulde */
    384   {"fy",	HB_TAG('F','R','I',' ')},	/* Western Frisian */
    385   {"ga",	HB_TAG('I','R','I',' ')},	/* Irish */
    386   {"gaa",	HB_TAG('G','A','D',' ')},	/* Ga */
    387   {"gag",	HB_TAG('G','A','G',' ')},	/* Gagauz */
    388   {"gbm",	HB_TAG('G','A','W',' ')},	/* Garhwali */
    389   {"gd",	HB_TAG('G','A','E',' ')},	/* Scottish Gaelic */
    390   {"gez",	HB_TAG('G','E','Z',' ')},	/* Ge'ez */
    391   {"ggo",	HB_TAG('G','O','N',' ')},	/* Southern Gondi */
    392   {"gih",	HB_TAG('G','I','H',' ')},	/* Githabul */
    393   {"gil",	HB_TAG('G','I','L','0')},	/* Kiribati (Gilbertese) */
    394   {"gkp",	HB_TAG('G','K','P',' ')},	/* Kpelle (Guinea) */
    395   {"gl",	HB_TAG('G','A','L',' ')},	/* Galician */
    396   {"gld",	HB_TAG('N','A','N',' ')},	/* Nanai */
    397   {"glk",	HB_TAG('G','L','K',' ')},	/* Gilaki */
    398   {"gn",	HB_TAG('G','U','A',' ')},	/* Guarani [macrolanguage] */
    399   {"gnn",	HB_TAG('G','N','N',' ')},	/* Gumatj */
    400   {"gno",	HB_TAG('G','O','N',' ')},	/* Northern Gondi */
    401   {"gog",	HB_TAG('G','O','G',' ')},	/* Gogo */
    402   {"gon",	HB_TAG('G','O','N',' ')},	/* Gondi [macrolanguage] */
    403   {"grt",	HB_TAG('G','R','O',' ')},	/* Garo */
    404   {"gru",	HB_TAG('S','O','G',' ')},	/* Sodo Gurage */
    405   {"gsw",	HB_TAG('A','L','S',' ')},	/* Alsatian */
    406   {"gu",	HB_TAG('G','U','J',' ')},	/* Gujarati */
    407   {"guc",	HB_TAG('G','U','C',' ')},	/* Wayuu */
    408   {"guf",	HB_TAG('G','U','F',' ')},	/* Gupapuyngu */
    409   {"guk",	HB_TAG('G','M','Z',' ')},	/* Gumuz */
    410 /*{"guk",	HB_TAG('G','U','K',' ')},*/	/* Gumuz (in SIL fonts) */
    411   {"guz",	HB_TAG('G','U','Z',' ')},	/* Ekegusii/Gusii */
    412   {"gv",	HB_TAG('M','N','X',' ')},	/* Manx */
    413   {"ha",	HB_TAG('H','A','U',' ')},	/* Hausa */
    414   {"har",	HB_TAG('H','R','I',' ')},	/* Harari */
    415   {"haw",	HB_TAG('H','A','W',' ')},	/* Hawaiian */
    416   {"hay",	HB_TAG('H','A','Y',' ')},	/* Haya */
    417   {"haz",	HB_TAG('H','A','Z',' ')},	/* Hazaragi */
    418   {"he",	HB_TAG('I','W','R',' ')},	/* Hebrew */
    419   {"hi",	HB_TAG('H','I','N',' ')},	/* Hindi */
    420   {"hil",	HB_TAG('H','I','L',' ')},	/* Hiligaynon */
    421   {"hlt",	HB_TAG('Q','I','N',' ')},	/* Matu Chin */
    422   {"hmn",	HB_TAG('H','M','N',' ')},	/* Hmong */
    423   {"hnd",	HB_TAG('H','N','D',' ')},	/* [Southern] Hindko */
    424   {"hne",	HB_TAG('C','H','H',' ')},	/* Chattisgarhi */
    425   {"hno",	HB_TAG('H','N','D',' ')},	/* [Northern] Hindko */
    426   {"ho",	HB_TAG('H','M','O',' ')},	/* Hiri Motu */
    427   {"hoc",	HB_TAG('H','O',' ',' ')},	/* Ho */
    428   {"hoj",	HB_TAG('H','A','R',' ')},	/* Harauti */
    429   {"hr",	HB_TAG('H','R','V',' ')},	/* Croatian */
    430   {"hsb",	HB_TAG('U','S','B',' ')},	/* Upper Sorbian */
    431   {"ht",	HB_TAG('H','A','I',' ')},	/* Haitian/Haitian Creole */
    432   {"hu",	HB_TAG('H','U','N',' ')},	/* Hungarian */
    433   {"hy",	HB_TAG('H','Y','E',' ')},	/* Armenian */
    434   {"hz",	HB_TAG('H','E','R',' ')},	/* Herero */
    435   {"ia",	HB_TAG('I','N','A',' ')},	/* Interlingua (International Auxiliary Language Association) */
    436   {"iba",	HB_TAG('I','B','A',' ')},	/* Iban */
    437   {"ibb",	HB_TAG('I','B','B',' ')},	/* Ibibio */
    438   {"id",	HB_TAG('I','N','D',' ')},	/* Indonesian */
    439   {"ie",	HB_TAG('I','L','E',' ')},	/* Interlingue/Occidental */
    440   {"ig",	HB_TAG('I','B','O',' ')},	/* Igbo */
    441   {"igb",	HB_TAG('E','B','I',' ')},	/* Ebira */
    442   {"ii",	HB_TAG('Y','I','M',' ')},	/* Yi Modern */
    443   {"ijc",	HB_TAG('I','J','O',' ')},	/* Izon */
    444   {"ijo",	HB_TAG('I','J','O',' ')},	/* Ijo [family] */
    445   {"ik",	HB_TAG('I','P','K',' ')},	/* Inupiaq [macrolanguage] */
    446   {"ilo",	HB_TAG('I','L','O',' ')},	/* Ilokano */
    447   {"inh",	HB_TAG('I','N','G',' ')},	/* Ingush */
    448   {"io",	HB_TAG('I','D','O',' ')},	/* Ido */
    449   {"is",	HB_TAG('I','S','L',' ')},	/* Icelandic */
    450   {"it",	HB_TAG('I','T','A',' ')},	/* Italian */
    451   {"iu",	HB_TAG('I','N','U',' ')},	/* Inuktitut [macrolanguage] */
    452   {"ja",	HB_TAG('J','A','N',' ')},	/* Japanese */
    453   {"jam",	HB_TAG('J','A','M',' ')},	/* Jamaican Creole English */
    454   {"jbo",	HB_TAG('J','B','O',' ')},	/* Lojban */
    455   {"jv",	HB_TAG('J','A','V',' ')},	/* Javanese */
    456   {"ka",	HB_TAG('K','A','T',' ')},	/* Georgian */
    457   {"kaa",	HB_TAG('K','R','K',' ')},	/* Karakalpak */
    458   {"kab",	HB_TAG('K','A','B','0')},	/* Kabyle */
    459   {"kam",	HB_TAG('K','M','B',' ')},	/* Kamba (Kenya) */
    460   {"kar",	HB_TAG('K','R','N',' ')},	/* Karen [family] */
    461   {"kat",	HB_TAG('K','G','E',' ')},	/* Khutsuri Georgian */
    462   {"kbd",	HB_TAG('K','A','B',' ')},	/* Kabardian */
    463   {"kde",	HB_TAG('K','D','E',' ')},	/* Makonde */
    464   {"kdr",	HB_TAG('K','R','M',' ')},	/* Karaim */
    465   {"kdt",	HB_TAG('K','U','Y',' ')},	/* Kuy */
    466   {"kea",	HB_TAG('K','E','A',' ')},	/* Kabuverdianu (Crioulo) */
    467   {"kek",	HB_TAG('K','E','K',' ')},	/* Kekchi */
    468   {"kex",	HB_TAG('K','K','N',' ')},	/* Kokni */
    469   {"kfa",	HB_TAG('K','O','D',' ')},	/* Kodagu */
    470   {"kfr",	HB_TAG('K','A','C',' ')},	/* Kachchi */
    471   {"kfx",	HB_TAG('K','U','L',' ')},	/* Kulvi */
    472   {"kfy",	HB_TAG('K','M','N',' ')},	/* Kumaoni */
    473   {"kg",	HB_TAG('K','O','N',' ')},	/* Kongo [macrolanguage] */
    474   {"kha",	HB_TAG('K','S','I',' ')},	/* Khasi */
    475   {"khb",	HB_TAG('X','B','D',' ')},	/* L */
    476   {"kht",	HB_TAG('K','H','N',' ')},	/* Khamti (Microsoft fonts) */
    477 /*{"kht",	HB_TAG('K','H','T',' ')},*/	/* Khamti (OpenType spec and SIL fonts) */
    478   {"khw",	HB_TAG('K','H','W',' ')},	/* Khowar */
    479   {"ki",	HB_TAG('K','I','K',' ')},	/* Gikuyu/Kikuyu */
    480   {"kiu",	HB_TAG('K','I','U',' ')},	/* Kirmanjki */
    481   {"kj",	HB_TAG('K','U','A',' ')},	/* Kuanyama/Kwanyama */
    482   {"kjd",	HB_TAG('K','J','D',' ')},	/* Southern Kiwai */
    483   {"kjh",	HB_TAG('K','H','A',' ')},	/* Khakass */
    484   {"kjp",	HB_TAG('K','J','P',' ')},	/* Pwo Eastern Karen */
    485   {"kk",	HB_TAG('K','A','Z',' ')},	/* Kazakh */
    486   {"kl",	HB_TAG('G','R','N',' ')},	/* Kalaallisut */
    487   {"kln",	HB_TAG('K','A','L',' ')},	/* Kalenjin */
    488   {"km",	HB_TAG('K','H','M',' ')},	/* Central Khmer */
    489   {"kmb",	HB_TAG('M','B','N',' ')},	/* Kimbundu */
    490   {"kmw",	HB_TAG('K','M','O',' ')},	/* Komo (Democratic Republic of Congo) */
    491   {"kn",	HB_TAG('K','A','N',' ')},	/* Kannada */
    492   {"knn",	HB_TAG('K','O','K',' ')},	/* Konkani */
    493   {"ko",	HB_TAG('K','O','R',' ')},	/* Korean */
    494   {"koi",	HB_TAG('K','O','P',' ')},	/* Komi-Permyak */
    495   {"kok",	HB_TAG('K','O','K',' ')},	/* Konkani [macrolanguage] */
    496   {"kon",	HB_TAG('K','O','N','0')},	/* Kongo */
    497   {"kos",	HB_TAG('K','O','S',' ')},	/* Kosraean */
    498   {"kpe",	HB_TAG('K','P','L',' ')},	/* Kpelle [macrolanguage] */
    499   {"kpv",	HB_TAG('K','O','Z',' ')},	/* Komi-Zyrian */
    500   {"kpy",	HB_TAG('K','Y','K',' ')},	/* Koryak */
    501   {"kqy",	HB_TAG('K','R','T',' ')},	/* Koorete */
    502   {"kr",	HB_TAG('K','N','R',' ')},	/* Kanuri [macrolanguage] */
    503   {"kri",	HB_TAG('K','R','I',' ')},	/* Krio */
    504   {"krl",	HB_TAG('K','R','L',' ')},	/* Karelian */
    505   {"kru",	HB_TAG('K','U','U',' ')},	/* Kurukh */
    506   {"ks",	HB_TAG('K','S','H',' ')},	/* Kashmiri */
    507   {"ksh",	HB_TAG('K','S','H','0')},	/* Ripuarian, Klsch */
    508 /*{"ksw",	HB_TAG('K','R','N',' ')},*/	/* S'gaw Karen (Microsoft fonts?) */
    509   {"ksw",	HB_TAG('K','S','W',' ')},	/* S'gaw Karen (OpenType spec and SIL fonts) */
    510   {"ktb",	HB_TAG('K','E','B',' ')},	/* Kebena */
    511   {"ktu",	HB_TAG('K','O','N',' ')},	/* Kikongo */
    512   {"ku",	HB_TAG('K','U','R',' ')},	/* Kurdish [macrolanguage] */
    513   {"kum",	HB_TAG('K','U','M',' ')},	/* Kumyk */
    514   {"kv",	HB_TAG('K','O','M',' ')},	/* Komi [macrolanguage] */
    515   {"kvd",	HB_TAG('K','U','I',' ')},	/* Kui (Indonesia) */
    516   {"kw",	HB_TAG('C','O','R',' ')},	/* Cornish */
    517   {"kxc",	HB_TAG('K','M','S',' ')},	/* Komso */
    518   {"kxu",	HB_TAG('K','U','I',' ')},	/* Kui (India) */
    519   {"ky",	HB_TAG('K','I','R',' ')},	/* Kirghiz/Kyrgyz */
    520   {"kyu",	HB_TAG('K','Y','U',' ')},	/* Western Kayah */
    521   {"la",	HB_TAG('L','A','T',' ')},	/* Latin */
    522   {"lad",	HB_TAG('J','U','D',' ')},	/* Ladino */
    523   {"lb",	HB_TAG('L','T','Z',' ')},	/* Luxembourgish */
    524   {"lbe",	HB_TAG('L','A','K',' ')},	/* Lak */
    525   {"lbj",	HB_TAG('L','D','K',' ')},	/* Ladakhi */
    526   {"lez",	HB_TAG('L','E','Z',' ')},	/* Lezgi */
    527   {"lg",	HB_TAG('L','U','G',' ')},	/* Ganda */
    528   {"li",	HB_TAG('L','I','M',' ')},	/* Limburgan/Limburger/Limburgish */
    529   {"lif",	HB_TAG('L','M','B',' ')},	/* Limbu */
    530   {"lij",	HB_TAG('L','I','J',' ')},	/* Ligurian */
    531   {"lis",	HB_TAG('L','I','S',' ')},	/* Lisu */
    532   {"ljp",	HB_TAG('L','J','P',' ')},	/* Lampung Api */
    533   {"lki",	HB_TAG('L','K','I',' ')},	/* Laki */
    534   {"lld",	HB_TAG('L','A','D',' ')},	/* Ladin */
    535   {"lmn",	HB_TAG('L','A','M',' ')},	/* Lambani */
    536   {"lmo",	HB_TAG('L','M','O',' ')},	/* Lombard */
    537   {"ln",	HB_TAG('L','I','N',' ')},	/* Lingala */
    538   {"lo",	HB_TAG('L','A','O',' ')},	/* Lao */
    539   {"lom",	HB_TAG('L','O','M',' ')},	/* Loma */
    540   {"lrc",	HB_TAG('L','R','C',' ')},	/* Northern Luri */
    541   {"lt",	HB_TAG('L','T','H',' ')},	/* Lithuanian */
    542   {"lu",	HB_TAG('L','U','B',' ')},	/* Luba-Katanga */
    543   {"lua",	HB_TAG('L','U','B',' ')},	/* Luba-Kasai */
    544   {"luo",	HB_TAG('L','U','O',' ')},	/* Luo (Kenya and Tanzania) */
    545   {"lus",	HB_TAG('M','I','Z',' ')},	/* Mizo */
    546   {"luy",	HB_TAG('L','U','H',' ')},	/* Luyia/Oluluyia [macrolanguage] */
    547   {"luz",	HB_TAG('L','R','C',' ')},	/* Southern Luri */
    548   {"lv",	HB_TAG('L','V','I',' ')},	/* Latvian */
    549   {"lzz",	HB_TAG('L','A','Z',' ')},	/* Laz */
    550   {"mad",	HB_TAG('M','A','D',' ')},	/* Madurese */
    551   {"mag",	HB_TAG('M','A','G',' ')},	/* Magahi */
    552   {"mai",	HB_TAG('M','T','H',' ')},	/* Maithili */
    553   {"mak",	HB_TAG('M','K','R',' ')},	/* Makasar */
    554   {"mam",	HB_TAG('M','A','M',' ')},	/* Mam */
    555   {"man",	HB_TAG('M','N','K',' ')},	/* Manding/Mandingo [macrolanguage] */
    556   {"mdc",	HB_TAG('M','L','E',' ')},	/* Male (Papua New Guinea) */
    557   {"mdf",	HB_TAG('M','O','K',' ')},	/* Moksha */
    558   {"mdr",	HB_TAG('M','D','R',' ')},	/* Mandar */
    559   {"mdy",	HB_TAG('M','L','E',' ')},	/* Male (Ethiopia) */
    560   {"men",	HB_TAG('M','D','E',' ')},	/* Mende (Sierra Leone) */
    561   {"mer",	HB_TAG('M','E','R',' ')},	/* Meru */
    562   {"mfe",	HB_TAG('M','F','E',' ')},	/* Morisyen */
    563   {"mg",	HB_TAG('M','L','G',' ')},	/* Malagasy [macrolanguage] */
    564   {"mh",	HB_TAG('M','A','H',' ')},	/* Marshallese */
    565   {"mhr",	HB_TAG('L','M','A',' ')},	/* Low Mari */
    566   {"mi",	HB_TAG('M','R','I',' ')},	/* Maori */
    567   {"min",	HB_TAG('M','I','N',' ')},	/* Minangkabau */
    568   {"mk",	HB_TAG('M','K','D',' ')},	/* Macedonian */
    569   {"mku",	HB_TAG('M','N','K',' ')},	/* Konyanka Maninka */
    570   {"mkw",	HB_TAG('M','K','W',' ')},	/* Kituba (Congo) */
    571   {"ml",	HB_TAG('M','L','R',' ')},	/* Malayalam */
    572   {"mlq",	HB_TAG('M','N','K',' ')},	/* Western Maninkakan */
    573   {"mn",	HB_TAG('M','N','G',' ')},	/* Mongolian [macrolanguage] */
    574   {"mnc",	HB_TAG('M','C','H',' ')},	/* Manchu */
    575   {"mni",	HB_TAG('M','N','I',' ')},	/* Manipuri */
    576   {"mnk",	HB_TAG('M','N','D',' ')},	/* Mandinka */
    577   {"mns",	HB_TAG('M','A','N',' ')},	/* Mansi */
    578   {"mnw",	HB_TAG('M','O','N',' ')},	/* Mon */
    579   {"mo",	HB_TAG('M','O','L',' ')},	/* Moldavian */
    580   {"moh",	HB_TAG('M','O','H',' ')},	/* Mohawk */
    581   {"mos",	HB_TAG('M','O','S',' ')},	/* Mossi */
    582   {"mpe",	HB_TAG('M','A','J',' ')},	/* Majang */
    583   {"mr",	HB_TAG('M','A','R',' ')},	/* Marathi */
    584   {"mrh",	HB_TAG('Q','I','N',' ')},	/* Mara Chin */
    585   {"mrj",	HB_TAG('H','M','A',' ')},	/* High Mari */
    586   {"ms",	HB_TAG('M','L','Y',' ')},	/* Malay [macrolanguage] */
    587   {"msc",	HB_TAG('M','N','K',' ')},	/* Sankaran Maninka */
    588   {"mt",	HB_TAG('M','T','S',' ')},	/* Maltese */
    589   {"mtr",	HB_TAG('M','A','W',' ')},	/* Mewari */
    590   {"mus",	HB_TAG('M','U','S',' ')},	/* Creek */
    591   {"mve",	HB_TAG('M','A','W',' ')},	/* Marwari (Pakistan) */
    592   {"mwk",	HB_TAG('M','N','K',' ')},	/* Kita Maninkakan */
    593   {"mwl",	HB_TAG('M','W','L',' ')},	/* Mirandese */
    594   {"mwr",	HB_TAG('M','A','W',' ')},	/* Marwari [macrolanguage] */
    595   {"mww",	HB_TAG('M','W','W',' ')},	/* Hmong Daw */
    596   {"my",	HB_TAG('B','R','M',' ')},	/* Burmese */
    597   {"mym",	HB_TAG('M','E','N',' ')},	/* Me'en */
    598   {"myn",	HB_TAG('M','Y','N',' ')},	/* Mayan */
    599   {"myq",	HB_TAG('M','N','K',' ')},	/* Forest Maninka (retired code) */
    600   {"myv",	HB_TAG('E','R','Z',' ')},	/* Erzya */
    601   {"mzn",	HB_TAG('M','Z','N',' ')},	/* Mazanderani */
    602   {"na",	HB_TAG('N','A','U',' ')},	/* Nauru */
    603   {"nag",	HB_TAG('N','A','G',' ')},	/* Naga-Assamese */
    604   {"nah",	HB_TAG('N','A','H',' ')},	/* Nahuatl [family] */
    605   {"nap",	HB_TAG('N','A','P',' ')},	/* Neapolitan */
    606   {"nb",	HB_TAG('N','O','R',' ')},	/* Norwegian Bokml */
    607   {"nco",	HB_TAG('S','I','B',' ')},	/* Sibe */
    608   {"nd",	HB_TAG('N','D','B',' ')},	/* [North] Ndebele */
    609   {"ndc",	HB_TAG('N','D','C',' ')},	/* Ndau */
    610   {"nds",	HB_TAG('N','D','S',' ')},	/* Low German/Low Saxon */
    611   {"ne",	HB_TAG('N','E','P',' ')},	/* Nepali */
    612   {"new",	HB_TAG('N','E','W',' ')},	/* Newari */
    613   {"ng",	HB_TAG('N','D','G',' ')},	/* Ndonga */
    614   {"nga",	HB_TAG('N','G','A',' ')},	/* Ngabaka */
    615   {"ngl",	HB_TAG('L','M','W',' ')},	/* Lomwe */
    616   {"ngo",	HB_TAG('S','X','T',' ')},	/* Sutu */
    617   {"niu",	HB_TAG('N','I','U',' ')},	/* Niuean */
    618   {"niv",	HB_TAG('G','I','L',' ')},	/* Gilyak */
    619   {"nl",	HB_TAG('N','L','D',' ')},	/* Dutch */
    620   {"nn",	HB_TAG('N','Y','N',' ')},	/* Norwegian Nynorsk */
    621   {"no",	HB_TAG('N','O','R',' ')},	/* Norwegian [macrolanguage] */
    622   {"nod",	HB_TAG('N','T','A',' ')},	/* Northern Thai */
    623   {"noe",	HB_TAG('N','O','E',' ')},	/* Nimadi */
    624   {"nog",	HB_TAG('N','O','G',' ')},	/* Nogai */
    625   {"nov",	HB_TAG('N','O','V',' ')},	/* Novial */
    626   {"nqo",	HB_TAG('N','K','O',' ')},	/* N'Ko */
    627   {"nr",	HB_TAG('N','D','B',' ')},	/* [South] Ndebele */
    628   {"nsk",	HB_TAG('N','A','S',' ')},	/* Naskapi */
    629   {"nso",	HB_TAG('S','O','T',' ')},	/* [Northern] Sotho */
    630   {"nv",	HB_TAG('N','A','V',' ')},	/* Navajo */
    631   {"ny",	HB_TAG('C','H','I',' ')},	/* Chewa/Chichwa/Nyanja */
    632   {"nym",	HB_TAG('N','Y','M',' ')},	/* Nyamwezi */
    633   {"nyn",	HB_TAG('N','K','L',' ')},	/* Nyankole */
    634   {"oc",	HB_TAG('O','C','I',' ')},	/* Occitan (post 1500) */
    635   {"oj",	HB_TAG('O','J','B',' ')},	/* Ojibwa [macrolanguage] */
    636   {"ojs",	HB_TAG('O','C','R',' ')},	/* Oji-Cree */
    637   {"okm",	HB_TAG('K','O','H',' ')},	/* Korean Old Hangul */
    638   {"om",	HB_TAG('O','R','O',' ')},	/* Oromo [macrolanguage] */
    639   {"or",	HB_TAG('O','R','I',' ')},	/* Oriya */
    640   {"os",	HB_TAG('O','S','S',' ')},	/* Ossetian */
    641   {"pa",	HB_TAG('P','A','N',' ')},	/* Panjabi */
    642   {"pag",	HB_TAG('P','A','G',' ')},	/* Pangasinan */
    643   {"pam",	HB_TAG('P','A','M',' ')},	/* Kapampangan/Pampanga */
    644   {"pap",	HB_TAG('P','A','P','0')},	/* Papiamento */
    645   {"pau",	HB_TAG('P','A','U',' ')},	/* Palauan */
    646   {"pcc",	HB_TAG('P','C','C',' ')},	/* Bouyei */
    647   {"pcd",	HB_TAG('P','C','D',' ')},	/* Picard */
    648   {"pce",	HB_TAG('P','L','G',' ')},	/* [Ruching] Palaung */
    649   {"pck",	HB_TAG('Q','I','N',' ')},	/* Paite Chin */
    650   {"pdc",	HB_TAG('P','D','C',' ')},	/* Pennsylvania German */
    651   {"pes",	HB_TAG('F','A','R',' ')},	/* Iranian Persian */
    652   {"phk",	HB_TAG('P','H','K',' ')},	/* Phake */
    653   {"pi",	HB_TAG('P','A','L',' ')},	/* Pali */
    654   {"pih",	HB_TAG('P','I','H',' ')},	/* Pitcairn-Norfolk */
    655   {"pl",	HB_TAG('P','L','K',' ')},	/* Polish */
    656   {"pll",	HB_TAG('P','L','G',' ')},	/* [Shwe] Palaung */
    657   {"plp",	HB_TAG('P','A','P',' ')},	/* Palpa */
    658   {"pms",	HB_TAG('P','M','S',' ')},	/* Piemontese */
    659   {"pnb",	HB_TAG('P','N','B',' ')},	/* Western Panjabi */
    660   {"poh",	HB_TAG('P','O','H',' ')},	/* Pocomchi */
    661   {"pon",	HB_TAG('P','O','N',' ')},	/* Pohnpeian */
    662   {"prs",	HB_TAG('D','R','I',' ')},	/* Afghan Persian/Dari */
    663   {"ps",	HB_TAG('P','A','S',' ')},	/* Pashto/Pushto [macrolanguage] */
    664   {"pt",	HB_TAG('P','T','G',' ')},	/* Portuguese */
    665   {"pwo",	HB_TAG('P','W','O',' ')},	/* Pwo Western Karen */
    666   {"qu",	HB_TAG('Q','U','Z',' ')},	/* Quechua [macrolanguage] */
    667   {"quc",	HB_TAG('Q','U','C',' ')},	/* K'iche'/Quich */
    668   {"quh",	HB_TAG('Q','U','H',' ')},	/* Quechua (Bolivia) */
    669   {"quz",	HB_TAG('Q','U','Z',' ')},	/* Cusco Quechua */
    670   {"qvi",	HB_TAG('Q','V','I',' ')},	/* Quechua (Ecuador) */
    671   {"qwh",	HB_TAG('Q','W','H',' ')},	/* Quechua (Peru) */
    672   {"raj",	HB_TAG('R','A','J',' ')},	/* Rajasthani [macrolanguage] */
    673   {"rar",	HB_TAG('R','A','R',' ')},	/* Rarotongan */
    674   {"rbb",	HB_TAG('P','L','G',' ')},	/* Rumai Palaung */
    675   {"rej",	HB_TAG('R','E','J',' ')},	/* Rejang */
    676   {"ria",	HB_TAG('R','I','A',' ')},	/* Riang (India) */
    677   {"rif",	HB_TAG('R','I','F',' ')},	/* Tarifit */
    678   {"ril",	HB_TAG('R','I','A',' ')},	/* Riang (Myanmar) */
    679   {"rit",	HB_TAG('R','I','T',' ')},	/* Ritarungo */
    680   {"rki",	HB_TAG('A','R','K',' ')},	/* Rakhine */
    681   {"rkw",	HB_TAG('R','K','W',' ')},	/* Arakwal */
    682   {"rm",	HB_TAG('R','M','S',' ')},	/* Romansh */
    683   {"rmy",	HB_TAG('R','M','Y',' ')},	/* Vlax Romani */
    684   {"rn",	HB_TAG('R','U','N',' ')},	/* Rundi */
    685   {"ro",	HB_TAG('R','O','M',' ')},	/* Romanian */
    686   {"rom",	HB_TAG('R','O','Y',' ')},	/* Romany [macrolanguage] */
    687   {"rtm",	HB_TAG('R','T','M',' ')},	/* Rotuman */
    688   {"ru",	HB_TAG('R','U','S',' ')},	/* Russian */
    689   {"rue",	HB_TAG('R','S','Y',' ')},	/* Rusyn */
    690   {"rup",	HB_TAG('R','U','P',' ')},	/* Aromanian/Arumanian/Macedo-Romanian */
    691   {"rw",	HB_TAG('R','U','A',' ')},	/* Kinyarwanda */
    692   {"rwr",	HB_TAG('M','A','W',' ')},	/* Marwari (India) */
    693   {"sa",	HB_TAG('S','A','N',' ')},	/* Sanskrit */
    694   {"sah",	HB_TAG('Y','A','K',' ')},	/* Yakut */
    695   {"sam",	HB_TAG('P','A','A',' ')},	/* Palestinian Aramaic */
    696   {"sas",	HB_TAG('S','A','S',' ')},	/* Sasak */
    697   {"sat",	HB_TAG('S','A','T',' ')},	/* Santali */
    698   {"sc",	HB_TAG('S','R','D',' ')},	/* Sardinian [macrolanguage] */
    699   {"sck",	HB_TAG('S','A','D',' ')},	/* Sadri */
    700   {"scn",	HB_TAG('S','C','N',' ')},	/* Sicilian */
    701   {"sco",	HB_TAG('S','C','O',' ')},	/* Scots */
    702   {"scs",	HB_TAG('S','L','A',' ')},	/* [North] Slavey */
    703   {"sd",	HB_TAG('S','N','D',' ')},	/* Sindhi */
    704   {"se",	HB_TAG('N','S','M',' ')},	/* Northern Sami */
    705   {"seh",	HB_TAG('S','N','A',' ')},	/* Sena */
    706   {"sel",	HB_TAG('S','E','L',' ')},	/* Selkup */
    707   {"sez",	HB_TAG('Q','I','N',' ')},	/* Senthang Chin */
    708   {"sg",	HB_TAG('S','G','O',' ')},	/* Sango */
    709   {"sga",	HB_TAG('S','G','A',' ')},	/* Old Irish (to 900) */
    710   {"sgs",	HB_TAG('S','G','S',' ')},	/* Samogitian */
    711   {"sgw",	HB_TAG('C','H','G',' ')},	/* Sebat Bet Gurage */
    712 /*{"sgw",	HB_TAG('S','G','W',' ')},*/	/* Sebat Bet Gurage (in SIL fonts) */
    713   {"shi",	HB_TAG('S','H','I',' ')},	/* Tachelhit */
    714   {"shn",	HB_TAG('S','H','N',' ')},	/* Shan */
    715   {"si",	HB_TAG('S','N','H',' ')},	/* Sinhala */
    716   {"sid",	HB_TAG('S','I','D',' ')},	/* Sidamo */
    717   {"sjd",	HB_TAG('K','S','M',' ')},	/* Kildin Sami */
    718   {"sk",	HB_TAG('S','K','Y',' ')},	/* Slovak */
    719   {"skr",	HB_TAG('S','R','K',' ')},	/* Seraiki */
    720   {"sl",	HB_TAG('S','L','V',' ')},	/* Slovenian */
    721   {"sm",	HB_TAG('S','M','O',' ')},	/* Samoan */
    722   {"sma",	HB_TAG('S','S','M',' ')},	/* Southern Sami */
    723   {"smj",	HB_TAG('L','S','M',' ')},	/* Lule Sami */
    724   {"smn",	HB_TAG('I','S','M',' ')},	/* Inari Sami */
    725   {"sms",	HB_TAG('S','K','S',' ')},	/* Skolt Sami */
    726   {"sn",	HB_TAG('S','N','A','0')},	/* Shona */
    727   {"snk",	HB_TAG('S','N','K',' ')},	/* Soninke */
    728   {"so",	HB_TAG('S','M','L',' ')},	/* Somali */
    729   {"sop",	HB_TAG('S','O','P',' ')},	/* Songe */
    730   {"sq",	HB_TAG('S','Q','I',' ')},	/* Albanian [macrolanguage] */
    731   {"sr",	HB_TAG('S','R','B',' ')},	/* Serbian */
    732   {"srr",	HB_TAG('S','R','R',' ')},	/* Serer */
    733   {"ss",	HB_TAG('S','W','Z',' ')},	/* Swati */
    734   {"st",	HB_TAG('S','O','T',' ')},	/* [Southern] Sotho */
    735   {"stq",	HB_TAG('S','T','Q',' ')},	/* Saterfriesisch */
    736   {"stv",	HB_TAG('S','I','G',' ')},	/* Silt'e */
    737   {"su",	HB_TAG('S','U','N',' ')},	/* Sundanese */
    738   {"suk",	HB_TAG('S','U','K',' ')},	/* Sukama */
    739   {"suq",	HB_TAG('S','U','R',' ')},	/* Suri */
    740   {"sv",	HB_TAG('S','V','E',' ')},	/* Swedish */
    741   {"sva",	HB_TAG('S','V','A',' ')},	/* Svan */
    742   {"sw",	HB_TAG('S','W','K',' ')},	/* Swahili [macrolanguage] */
    743   {"swb",	HB_TAG('C','M','R',' ')},	/* Comorian */
    744   {"swh",	HB_TAG('S','W','K',' ')},	/* Kiswahili/Swahili */
    745   {"swv",	HB_TAG('M','A','W',' ')},	/* Shekhawati */
    746   {"sxu",	HB_TAG('S','X','U',' ')},	/* Upper Saxon */
    747   {"syc",	HB_TAG('S','Y','R',' ')},	/* Classical Syriac */
    748   {"syl",	HB_TAG('S','Y','L',' ')},	/* Sylheti */
    749   {"syr",	HB_TAG('S','Y','R',' ')},	/* Syriac [macrolanguage] */
    750   {"szl",	HB_TAG('S','Z','L',' ')},	/* Silesian */
    751   {"ta",	HB_TAG('T','A','M',' ')},	/* Tamil */
    752   {"tab",	HB_TAG('T','A','B',' ')},	/* Tabasaran */
    753   {"tcp",	HB_TAG('Q','I','N',' ')},	/* Tawr Chin */
    754   {"tcy",	HB_TAG('T','U','L',' ')},	/* Tulu */
    755   {"tcz",	HB_TAG('Q','I','N',' ')},	/* Thado Chin */
    756   {"tdd",	HB_TAG('T','D','D',' ')},	/* Tai Na */
    757   {"te",	HB_TAG('T','E','L',' ')},	/* Telugu */
    758   {"tem",	HB_TAG('T','M','N',' ')},	/* Temne */
    759   {"tet",	HB_TAG('T','E','T',' ')},	/* Tetum */
    760   {"tg",	HB_TAG('T','A','J',' ')},	/* Tajik */
    761   {"th",	HB_TAG('T','H','A',' ')},	/* Thai */
    762   {"ti",	HB_TAG('T','G','Y',' ')},	/* Tigrinya */
    763   {"tig",	HB_TAG('T','G','R',' ')},	/* Tigre */
    764   {"tiv",	HB_TAG('T','I','V',' ')},	/* Tiv */
    765   {"tk",	HB_TAG('T','K','M',' ')},	/* Turkmen */
    766   {"tl",	HB_TAG('T','G','L',' ')},	/* Tagalog */
    767   {"tmh",	HB_TAG('T','M','H',' ')},	/* Tamashek */
    768   {"tn",	HB_TAG('T','N','A',' ')},	/* Tswana */
    769   {"to",	HB_TAG('T','G','N',' ')},	/* Tonga (Tonga Islands) */
    770   {"tod",	HB_TAG('T','O','D','0')},	/* Toma */
    771   {"toi",	HB_TAG('T','N','G',' ')},	/* Tonga */
    772   {"tpi",	HB_TAG('T','P','I',' ')},	/* Tok Pisin */
    773   {"tr",	HB_TAG('T','R','K',' ')},	/* Turkish */
    774   {"tru",	HB_TAG('T','U','A',' ')},	/* Turoyo Aramaic */
    775   {"ts",	HB_TAG('T','S','G',' ')},	/* Tsonga */
    776   {"tt",	HB_TAG('T','A','T',' ')},	/* Tatar */
    777   {"tum",	HB_TAG('T','U','M',' ')},	/* Tumbuka */
    778   {"tvl",	HB_TAG('T','V','L',' ')},	/* Tuvalu */
    779   {"tw",	HB_TAG('T','W','I',' ')},	/* Twi */
    780   {"ty",	HB_TAG('T','H','T',' ')},	/* Tahitian */
    781   {"tyv",	HB_TAG('T','U','V',' ')},	/* Tuvin */
    782   {"tyz",	HB_TAG('T','Y','Z',' ')},	/* Ty */
    783   {"tzm",	HB_TAG('T','Z','M',' ')},	/* Central Atlas Tamazight */
    784   {"tzo",	HB_TAG('T','Z','O',' ')},	/* Tzotzil */
    785   {"udm",	HB_TAG('U','D','M',' ')},	/* Udmurt */
    786   {"ug",	HB_TAG('U','Y','G',' ')},	/* Uighur */
    787   {"uk",	HB_TAG('U','K','R',' ')},	/* Ukrainian */
    788   {"umb",	HB_TAG('U','M','B',' ')},	/* Umbundu */
    789   {"unr",	HB_TAG('M','U','N',' ')},	/* Mundari */
    790   {"ur",	HB_TAG('U','R','D',' ')},	/* Urdu */
    791   {"uz",	HB_TAG('U','Z','B',' ')},	/* Uzbek [macrolanguage] */
    792   {"uzn",	HB_TAG('U','Z','B',' ')},	/* Northern Uzbek */
    793   {"uzs",	HB_TAG('U','Z','B',' ')},	/* Southern Uzbek */
    794   {"ve",	HB_TAG('V','E','N',' ')},	/* Venda */
    795   {"vec",	HB_TAG('V','E','C',' ')},	/* Venetian */
    796   {"vi",	HB_TAG('V','I','T',' ')},	/* Vietnamese */
    797   {"vls",	HB_TAG('F','L','E',' ')},	/* Vlaams */
    798   {"vmw",	HB_TAG('M','A','K',' ')},	/* Makhuwa */
    799   {"vo",	HB_TAG('V','O','L',' ')},	/* Volapk */
    800   {"vro",	HB_TAG('V','R','O',' ')},	/* Vro */
    801   {"wa",	HB_TAG('W','L','N',' ')},	/* Walloon */
    802   {"war",	HB_TAG('W','A','R',' ')},	/* Waray (Philippines) */
    803   {"wbm",	HB_TAG('W','A',' ',' ')},	/* Wa */
    804   {"wbr",	HB_TAG('W','A','G',' ')},	/* Wagdi */
    805   {"wle",	HB_TAG('S','I','G',' ')},	/* Wolane */
    806   {"wo",	HB_TAG('W','L','F',' ')},	/* Wolof */
    807   {"wry",	HB_TAG('M','A','W',' ')},	/* Merwari */
    808   {"wtm",	HB_TAG('W','T','M',' ')},	/* Mewati */
    809   {"xal",	HB_TAG('K','L','M',' ')},	/* Kalmyk */
    810   {"xan",	HB_TAG('S','E','K',' ')},	/* Sekota */
    811   {"xh",	HB_TAG('X','H','S',' ')},	/* Xhosa */
    812   {"xjb",	HB_TAG('X','J','B',' ')},	/* Minjangbal */
    813   {"xog",	HB_TAG('X','O','G',' ')},	/* Soga */
    814   {"xom",	HB_TAG('K','M','O',' ')},	/* Komo (Sudan) */
    815   {"xpe",	HB_TAG('X','P','E',' ')},	/* Kpelle (Liberia) */
    816   {"xsl",	HB_TAG('S','S','L',' ')},	/* South Slavey */
    817   {"xst",	HB_TAG('S','I','G',' ')},	/* Silt'e (retired code) */
    818   {"xwo",	HB_TAG('T','O','D',' ')},	/* Written Oirat (Todo) */
    819   {"yao",	HB_TAG('Y','A','O',' ')},	/* Yao */
    820   {"yap",	HB_TAG('Y','A','P',' ')},	/* Yapese */
    821   {"yi",	HB_TAG('J','I','I',' ')},	/* Yiddish [macrolanguage] */
    822   {"yo",	HB_TAG('Y','B','A',' ')},	/* Yoruba */
    823   {"yos",	HB_TAG('Q','I','N',' ')},	/* Yos, deprecated by IANA in favor of Zou [zom] */
    824   {"yso",	HB_TAG('N','I','S',' ')},	/* Nisi (China) */
    825   {"za",	HB_TAG('Z','H','A',' ')},	/* Chuang/Zhuang [macrolanguage] */
    826   {"zea",	HB_TAG('Z','E','A',' ')},	/* Zeeuws */
    827   {"zgh",	HB_TAG('Z','G','H',' ')},	/* Standard Morrocan Tamazigh */
    828   {"zne",	HB_TAG('Z','N','D',' ')},	/* Zande */
    829   {"zom",	HB_TAG('Q','I','N',' ')},	/* Zou */
    830   {"zu",	HB_TAG('Z','U','L',' ')}, 	/* Zulu */
    831   {"zum",	HB_TAG('L','R','C',' ')},	/* Kumzari */
    832   {"zza",	HB_TAG('Z','Z','A',' ')},	/* Zazaki */
    833 
    834   /* The corresponding languages IDs for the following IDs are unclear,
    835    * overlap, or are architecturally weird. Needs more research. */
    836 
    837 /*{"chp",	HB_TAG('S','A','Y',' ')},*/	/* Sayisi */
    838 /*{"cwd",	HB_TAG('T','C','R',' ')},*/	/* TH-Cree */
    839 /*{"emk",	HB_TAG('E','M','K',' ')},*/	/* Eastern Maninkakan */
    840 /*{"krc",	HB_TAG('B','A','L',' ')},*/	/* Balkar */
    841 /*{"??",	HB_TAG('B','C','R',' ')},*/	/* Bible Cree */
    842 /*{"zh?",	HB_TAG('C','H','N',' ')},*/	/* Chinese (seen in Microsoft fonts) */
    843 /*{"ar-Syrc?",	HB_TAG('G','A','R',' ')},*/	/* Garshuni */
    844 /*{"hy?",	HB_TAG('H','Y','E','0')},*/	/* Armenian East (ISO 639-3 hye according to Microsoft, but thats equivalent to ISO 639-1 hy) */
    845 /*{"ga-Latg?/"	HB_TAG('I','R','T',' ')},*/	/* Irish Traditional */
    846 /*{"krc",	HB_TAG('K','A','R',' ')},*/	/* Karachay */
    847 /*{"ka-Geok?",	HB_TAG('K','G','E',' ')},*/	/* Khutsuri Georgian */
    848 /*{"kca",	HB_TAG('K','H','K',' ')},*/	/* Khanty-Kazim */
    849 /*{"kca",	HB_TAG('K','H','S',' ')},*/	/* Khanty-Shurishkar */
    850 /*{"kca",	HB_TAG('K','H','V',' ')},*/	/* Khanty-Vakhi */
    851 /*{"kqs, kss",	HB_TAG('K','I','S',' ')},*/	/* Kisii */
    852 /*{"lua",	HB_TAG('L','U','A',' ')},*/	/* Luba-Lulua */
    853 /*{"mlq",	HB_TAG('M','L','N',' ')},*/	/* Malinke */
    854 /*{"nso",	HB_TAG('N','S','O',' ')},*/	/* Sotho, Northern */
    855 /*{"??",	HB_TAG('M','A','L',' ')},*/	/* Malayalam Traditional */
    856 /*{"csw",	HB_TAG('N','C','R',' ')},*/	/* N-Cree */
    857 /*{"csw",	HB_TAG('N','H','C',' ')},*/	/* Norway House Cree */
    858 /*{"el-polyton",	HB_TAG('P','G','R',' ')},*/	/* Polytonic Greek */
    859 /*{"bgr, cnh, cnw, czt, sez, tcp, csy, ctd, flm, pck, tcz, zom, cmr, dao, hlt, cka, cnk, mrh, mwg, cbl, cnb, csh",	HB_TAG('Q','I','N',' ')},*/	/* Chin */
    860 /*{"??",	HB_TAG('Y','I','C',' ')},*/	/* Yi Classic */
    861 /*{"zh-Latn-pinyin",	HB_TAG('Z','H','P',' ')},*/	/* Chinese Phonetic */
    862 };
    863 
    864 typedef struct {
    865   char language[11];
    866   hb_tag_t tag;
    867 } LangTagLong;
    868 static const LangTagLong ot_languages_zh[] = {
    869   /* Store longest-first, if one is a prefix of another. */
    870   {"zh-cn",	HB_TAG('Z','H','S',' ')},	/* Chinese (China) */
    871   {"zh-hk",	HB_TAG('Z','H','H',' ')},	/* Chinese (Hong Kong) */
    872   {"zh-mo",	HB_TAG('Z','H','H',' ')},	/* Chinese (Macao) */
    873   {"zh-sg",	HB_TAG('Z','H','S',' ')},	/* Chinese (Singapore) */
    874   {"zh-tw",	HB_TAG('Z','H','T',' ')},	/* Chinese (Taiwan) */
    875   {"zh-hans",	HB_TAG('Z','H','S',' ')},	/* Chinese (Simplified) */
    876   {"zh-hant-hk",HB_TAG('Z','H','H',' ')},	/* Chinese (Hong Kong) */
    877   {"zh-hant-mo",HB_TAG('Z','H','H',' ')},	/* Chinese (Macao) */
    878   {"zh-hant",	HB_TAG('Z','H','T',' ')},	/* Chinese (Traditional) */
    879 };
    880 
    881 static int
    882 lang_compare_first_component (const void *pa,
    883 			      const void *pb)
    884 {
    885   const char *a = (const char *) pa;
    886   const char *b = (const char *) pb;
    887   unsigned int da, db;
    888   const char *p;
    889 
    890   p = strchr (a, '-');
    891   da = p ? (unsigned int) (p - a) : strlen (a);
    892 
    893   p = strchr (b, '-');
    894   db = p ? (unsigned int) (p - b) : strlen (b);
    895 
    896   return strncmp (a, b, MAX (da, db));
    897 }
    898 
    899 static hb_bool_t
    900 lang_matches (const char *lang_str, const char *spec)
    901 {
    902   unsigned int len = strlen (spec);
    903 
    904   return strncmp (lang_str, spec, len) == 0 &&
    905 	 (lang_str[len] == '\0' || lang_str[len] == '-');
    906 }
    907 
    908 hb_tag_t
    909 hb_ot_tag_from_language (hb_language_t language)
    910 {
    911   const char *lang_str, *s;
    912 
    913   if (language == HB_LANGUAGE_INVALID)
    914     return HB_OT_TAG_DEFAULT_LANGUAGE;
    915 
    916   lang_str = hb_language_to_string (language);
    917 
    918   s = strstr (lang_str, "x-hbot");
    919   if (s) {
    920     char tag[4];
    921     int i;
    922     s += 6;
    923     for (i = 0; i < 4 && ISALNUM (s[i]); i++)
    924       tag[i] = TOUPPER (s[i]);
    925     if (i) {
    926       for (; i < 4; i++)
    927 	tag[i] = ' ';
    928       return HB_TAG (tag[0], tag[1], tag[2], tag[3]);
    929     }
    930   }
    931 
    932   /*
    933    * "fonipa" is a variant tag in BCP-47, meaning the International Phonetic Alphabet.
    934    * It can be applied to any language.
    935    */
    936   if (strstr (lang_str, "-fonipa")) {
    937     return HB_TAG('I','P','P','H');  /* Phonetic transcriptionIPA conventions */
    938   }
    939 
    940   /*
    941    * "fonnapa" is a variant tag in BCP-47, meaning the North American Phonetic Alphabet
    942    * also known as Americanist Phonetic Notation.  It can be applied to any language.
    943    */
    944   if (strstr (lang_str, "-fonnapa")) {
    945     return HB_TAG('A','P','P','H');  /* Phonetic transcriptionAmericanist conventions */
    946   }
    947 
    948   /*
    949    * "Syre" is a BCP-47 script tag, meaning the Estrangela variant of the Syriac script.
    950    * It can be applied to any language.
    951    */
    952   if (strstr (lang_str, "-syre")) {
    953     return HB_TAG('S','Y','R','E');  /* Estrangela Syriac */
    954   }
    955 
    956   /*
    957    * "Syrj" is a BCP-47 script tag, meaning the Western variant of the Syriac script.
    958    * It can be applied to any language.
    959    */
    960   if (strstr (lang_str, "-syrj")) {
    961     return HB_TAG('S','Y','R','J');  /* Western Syriac */
    962   }
    963 
    964   /*
    965    * "Syrn" is a BCP-47 script tag, meaning the Eastern variant of the Syriac script.
    966    * It can be applied to any language.
    967    */
    968   if (strstr (lang_str, "-syrn")) {
    969     return HB_TAG('S','Y','R','N');  /* Eastern Syriac */
    970   }
    971 
    972   /* Find a language matching in the first component */
    973   {
    974     const LangTag *lang_tag;
    975     lang_tag = (LangTag *) bsearch (lang_str, ot_languages,
    976 				    ARRAY_LENGTH (ot_languages), sizeof (LangTag),
    977 				    lang_compare_first_component);
    978     if (lang_tag)
    979       return lang_tag->tag;
    980   }
    981 
    982   /* Otherwise, check the Chinese ones */
    983   if (0 == lang_compare_first_component (lang_str, "zh"))
    984   {
    985     unsigned int i;
    986 
    987     for (i = 0; i < ARRAY_LENGTH (ot_languages_zh); i++)
    988     {
    989       const LangTagLong *lang_tag;
    990       lang_tag = &ot_languages_zh[i];
    991       if (lang_matches (lang_str, lang_tag->language))
    992 	return lang_tag->tag;
    993     }
    994 
    995     /* Otherwise just return 'ZHS ' */
    996     return HB_TAG('Z','H','S',' ');
    997   }
    998 
    999   s = strchr (lang_str, '-');
   1000   if (!s)
   1001     s = lang_str + strlen (lang_str);
   1002   if (s - lang_str == 3) {
   1003     /* Assume it's ISO-639-3 and upper-case and use it. */
   1004     return hb_tag_from_string (lang_str, s - lang_str) & ~0x20202000u;
   1005   }
   1006 
   1007   return HB_OT_TAG_DEFAULT_LANGUAGE;
   1008 }
   1009 
   1010 /**
   1011  * hb_ot_tag_to_language:
   1012  *
   1013  *
   1014  *
   1015  * Return value: (transfer none):
   1016  *
   1017  * Since: 0.9.2
   1018  **/
   1019 hb_language_t
   1020 hb_ot_tag_to_language (hb_tag_t tag)
   1021 {
   1022   unsigned int i;
   1023 
   1024   if (tag == HB_OT_TAG_DEFAULT_LANGUAGE)
   1025     return nullptr;
   1026 
   1027   /* struct LangTag has only room for 3-letter language tags. */
   1028   switch (tag) {
   1029   case HB_TAG('A','P','P','H'):  /* Phonetic transcriptionAmericanist conventions */
   1030     return hb_language_from_string ("und-fonnapa", -1);
   1031   case HB_TAG('I','P','P','H'):  /* Phonetic transcriptionIPA conventions */
   1032     return hb_language_from_string ("und-fonipa", -1);
   1033   case HB_TAG('S','Y','R',' '):  /* Syriac [macrolanguage] */
   1034     return hb_language_from_string ("syr", -1);
   1035   case HB_TAG('S','Y','R','E'):  /* Estrangela Syriac */
   1036     return hb_language_from_string ("und-Syre", -1);
   1037   case HB_TAG('S','Y','R','J'):  /* Western Syriac */
   1038     return hb_language_from_string ("und-Syrj", -1);
   1039   case HB_TAG('S','Y','R','N'):  /* Eastern Syriac */
   1040     return hb_language_from_string ("und-Syrn", -1);
   1041   }
   1042 
   1043   for (i = 0; i < ARRAY_LENGTH (ot_languages); i++)
   1044     if (ot_languages[i].tag == tag)
   1045       return hb_language_from_string (ot_languages[i].language, -1);
   1046 
   1047   /* If tag starts with ZH, it's Chinese */
   1048   if ((tag & 0xFFFF0000u)  == 0x5A480000u) {
   1049     switch (tag) {
   1050       case HB_TAG('Z','H','H',' '): return hb_language_from_string ("zh-hk", -1); /* Hong Kong */
   1051       case HB_TAG('Z','H','S',' '): return hb_language_from_string ("zh-Hans", -1); /* Simplified */
   1052       case HB_TAG('Z','H','T',' '): return hb_language_from_string ("zh-Hant", -1); /* Traditional */
   1053       default: break; /* Fall through */
   1054     }
   1055   }
   1056 
   1057   /* Else return a custom language in the form of "x-hbotABCD" */
   1058   {
   1059     unsigned char buf[11] = "x-hbot";
   1060     buf[6] = tag >> 24;
   1061     buf[7] = (tag >> 16) & 0xFF;
   1062     buf[8] = (tag >> 8) & 0xFF;
   1063     buf[9] = tag & 0xFF;
   1064     if (buf[9] == 0x20)
   1065       buf[9] = '\0';
   1066     buf[10] = '\0';
   1067     return hb_language_from_string ((char *) buf, -1);
   1068   }
   1069 }
   1070 
   1071 #ifdef MAIN
   1072 static inline void
   1073 test_langs_sorted (void)
   1074 {
   1075   for (unsigned int i = 1; i < ARRAY_LENGTH (ot_languages); i++)
   1076   {
   1077     int c = lang_compare_first_component (ot_languages[i-1].language, ot_languages[i].language);
   1078     if (c >= 0)
   1079     {
   1080       fprintf (stderr, "ot_languages not sorted at index %d: %s %d %s\n",
   1081 	       i, ot_languages[i-1].language, c, ot_languages[i].language);
   1082       abort();
   1083     }
   1084   }
   1085 }
   1086 
   1087 int
   1088 main (void)
   1089 {
   1090   test_langs_sorted ();
   1091   return 0;
   1092 }
   1093 
   1094 #endif
   1095