// Copyright 2013 Google Inc. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // // Author: dsites@google.com (Dick Sites) // #include "compact_lang_det_hint_code.h" #include // for abs() #include // for sprintf() #include // #include "lang_script.h" #include "port.h" using namespace std; namespace CLD2 { static const int kCLDPriorEncodingWeight = 4; // 100x more likely static const int kCLDPriorLanguageWeight = 8; // 10000x more likely // Tables to map lang="..." language code lists to actual languages. // based on scraping and hand-edits, dsites June 2011 // n = f(string, &a) gives list of n<=4 language pairs: primary, secondary // For close pairs like ms/id, more weight on TLD and lang= // Alternately, weaker boost but mark others of set as negative; // makes "neither" an easier result. // lang=en low weight 4 // tld=lu boost lu maaybe 4. but lang= alwyas overcomes tld and encoding // (except maybe en) // TLD to separate, e.g., burundi from rwanda // Encoding lookup: OneLangProb array // TLD lookup: tld OneLangProb pairs typedef struct { const char* const langtag; // Lowercased, hyphen only lookup key const char* const langcode; // Canonical language codes; two if ambiguous OneCLDLangPrior onelangprior1; OneCLDLangPrior onelangprior2; } LangTagLookup; typedef struct { const char* const tld; // Lowercased, hyphen only lookup key OneCLDLangPrior onelangprior1; OneCLDLangPrior onelangprior2; } TLDLookup; #define W2 (2 << 10) // 3**2 = 10x more likely #define W4 (4 << 10) // 3**4 = 100x more likely #define W6 (6 << 10) // 3**6 = 1000x more likely #define W8 (8 << 10) // 3**8 = 10K x more likely #define W10 (10 << 10) // 3**10 = 100K x more likely #define W12 (12 << 10) // 3**12 = 1M x more likely // TODO: more about ba hr sr sr-ME and sl // Temporary state of affairs: // BOSNIAN CROATIAN MONTENEGRIN SERBIAN detecting just CROATIAN SERBIAN // Eventually, we want to do all four, but it requires a CLD change to handle // up to six languages per quadgram. // Close pairs boost one of pair, demote other. // Statistically close pairs: // INDONESIAN/MALAY difficult to distinguish -- extra word-based lookups used // // INDONESIAN MALAY coef=0.4698 Problematic w/o extra words // TIBETAN DZONGKHA coef=0.4571 // CZECH SLOVAK coef=0.4273 // NORWEGIAN NORWEGIAN_N coef=0.4182 // // HINDI MARATHI coef=0.3795 // ZULU XHOSA coef=0.3716 // // DANISH NORWEGIAN coef=0.3672 Usually OK // BIHARI HINDI coef=0.3668 Usually OK // ICELANDIC FAROESE coef=0.3519 Usually OK // // Table to look up lang= tags longer than three characters // Overrides table below, which is truncated at first hyphen // In alphabetical order for binary search static const int kCLDTable1Size = 213; static const LangTagLookup kCLDLangTagsHintTable1[kCLDTable1Size] = { {"abkhazian", "ab", ABKHAZIAN + W10, 0}, {"afar", "aa", AFAR + W10, 0}, {"afrikaans", "af", AFRIKAANS + W10, 0}, {"akan", "ak", AKAN + W10, 0}, {"albanian", "sq", ALBANIAN + W10, 0}, {"am-am", "hy", ARMENIAN + W10, 0}, // 1:2 Armenian, not ambiguous {"amharic", "am", AMHARIC + W10, 0}, {"arabic", "ar", ARABIC + W10, 0}, {"argentina", "es", SPANISH + W10, 0}, {"armenian", "hy", ARMENIAN + W10, 0}, {"assamese", "as", ASSAMESE + W10, 0}, {"aymara", "ay", AYMARA + W10, 0}, {"azerbaijani", "az", AZERBAIJANI + W10, 0}, {"bangla", "bn", BENGALI + W10, 0}, {"bashkir", "ba", BASHKIR + W10, 0}, {"basque", "eu", BASQUE + W10, 0}, {"belarusian", "be", BELARUSIAN + W10, 0}, {"bengali", "bn", BENGALI + W10, 0}, {"bihari", "bh", BIHARI + W10, HINDI - W4}, {"bislama", "bi", BISLAMA + W10, 0}, {"bosnian", "bs", BOSNIAN + W10, 0}, // Bosnian => Bosnian {"br-br", "pt", PORTUGUESE + W10, 0}, // 1:2 Portuguese, not ambiguous {"br-fr", "br", BRETON + W10, 0}, // 1:2 Breton, not ambiguous {"breton", "br", BRETON + W10, 0}, {"bulgarian", "bg", BULGARIAN + W10, 0}, {"burmese", "my", BURMESE + W10, 0}, // Myanmar {"catalan", "ca", CATALAN + W10, 0}, {"cherokee", "chr", CHEROKEE + W10, 0}, {"chichewa", "ny", NYANJA + W10, 0}, {"chinese", "zh", CHINESE + W10, 0}, {"chinese-t", "zhT", CHINESE_T + W10, 0}, {"chineset", "zhT", CHINESE_T + W10, 0}, {"corsican", "co", CORSICAN + W10, 0}, {"cpf-hat", "ht", HAITIAN_CREOLE + W10, 0}, // Creole, French-based {"croatian", "hr", CROATIAN + W10, 0}, {"czech", "cs", CZECH + W10, SLOVAK - W4}, {"danish", "da", DANISH + W10, NORWEGIAN - W4}, {"deutsch", "de", GERMAN + W10, 0}, {"dhivehi", "dv", DHIVEHI + W10, 0}, {"dutch", "nl", DUTCH + W10, 0}, {"dzongkha", "dz", DZONGKHA + W10, TIBETAN - W4}, {"ell-gr", "el", GREEK + W10, 0}, {"english", "en", ENGLISH + W4, 0}, {"esperanto", "eo", ESPERANTO + W10, 0}, {"estonian", "et", ESTONIAN + W10, 0}, {"euc-jp", "ja", JAPANESE + W10, 0}, // Japanese encoding {"euc-kr", "ko", KOREAN + W10, 0}, // Korean encoding {"faroese", "fo", FAROESE + W10, ICELANDIC - W4}, {"fijian", "fj", FIJIAN + W10, 0}, {"finnish", "fi", FINNISH + W10, 0}, {"fran", "fr", FRENCH + W10, 0}, // Truncated at non-ASCII {"francais", "fr", FRENCH + W10, 0}, {"french", "fr", FRENCH + W10, 0}, {"frisian", "fy", FRISIAN + W10, 0}, {"ga-es", "gl", GALICIAN + W10, 0}, // 1:2 Galician, not ambiguous {"galician", "gl", GALICIAN + W10, 0}, {"ganda", "lg", GANDA + W10, 0}, {"georgian", "ka", GEORGIAN + W10, 0}, {"german", "de", GERMAN + W10, 0}, {"greek", "el", GREEK + W10, 0}, {"greenlandic", "kl", GREENLANDIC + W10, 0}, {"guarani", "gn", GUARANI + W10, 0}, {"gujarati", "gu", GUJARATI + W10, 0}, {"haitian_creole", "ht", HAITIAN_CREOLE + W10, 0}, {"hausa", "ha", HAUSA + W10, 0}, {"hawaiian", "haw", HAWAIIAN + W10, 0}, {"hebrew", "he", HEBREW + W10, 0}, {"hindi", "hi", HINDI + W10, MARATHI - W4}, {"hn-in", "hi", HINDI + W10, MARATHI - W4}, {"hungarian", "hu", HUNGARIAN + W10, 0}, {"icelandic", "is", ICELANDIC + W10, FAROESE - W4}, {"igbo", "ig", IGBO + W10, 0}, {"indonesian", "id", INDONESIAN + W10, MALAY - W4}, {"interlingua", "ia", INTERLINGUA + W10, 0}, {"interlingue", "ie", INTERLINGUE + W10, 0}, // 1:2 iu-Cans ik-Latn {"inuktitut", "iu,ik", INUKTITUT + W10, INUPIAK + W10}, // 1:2 {"inupiak", "ik,iu", INUPIAK + W10, INUKTITUT + W10}, // 1:2 {"ir-ie", "ga", IRISH + W10, 0}, // Irish {"irish", "ga", IRISH + W10, 0}, {"italian", "it", ITALIAN + W10, 0}, {"ja-euc", "ja", JAPANESE + W10, 0}, // Japanese encoding {"jan-jp", "ja", JAPANESE + W10, 0}, // Japanese encoding {"japanese", "ja", JAPANESE + W10, 0}, {"javanese", "jw", JAVANESE + W10, 0}, {"kannada", "kn", KANNADA + W10, 0}, {"kashmiri", "ks", KASHMIRI + W10, 0}, {"kazakh", "kk", KAZAKH + W10, 0}, {"khasi", "kha", KHASI + W10, 0}, {"khmer", "km", KHMER + W10, 0}, {"kinyarwanda", "rw", KINYARWANDA + W10, 0}, {"klingon", "tlh", X_KLINGON + W10, 0}, {"korean", "ko", KOREAN + W10, 0}, {"kurdish", "ku", KURDISH + W10, 0}, {"kyrgyz", "ky", KYRGYZ + W10, 0}, {"laothian", "lo", LAOTHIAN + W10, 0}, {"latin", "la", LATIN + W10, 0}, {"latvian", "lv", LATVIAN + W10, 0}, {"limbu", "sit", LIMBU + W10, 0}, {"lingala", "ln", LINGALA + W10, 0}, {"lithuanian", "lt", LITHUANIAN + W10, 0}, {"luxembourgish", "lb", LUXEMBOURGISH + W10, 0}, {"macedonian", "mk", MACEDONIAN + W10, 0}, {"malagasy", "mg", MALAGASY + W10, 0}, {"malay", "ms", MALAY + W10, INDONESIAN - W4}, {"malayalam", "ml", MALAYALAM + W10, 0}, {"maltese", "mt", MALTESE + W10, 0}, {"manx", "gv", MANX + W10, 0}, {"maori", "mi", MAORI + W10, 0}, {"marathi", "mr", MARATHI + W10, HINDI - W4}, {"mauritian_creole", "mfe", MAURITIAN_CREOLE + W10, 0}, {"moldavian", "mo", ROMANIAN + W10, 0}, {"mongolian", "mn", MONGOLIAN + W10, 0}, {"montenegrin", "sr-me", MONTENEGRIN + W10, 0}, {"myanmar", "my", BURMESE + W10, 0}, // Myanmar {"nauru", "na", NAURU + W10, 0}, {"ndebele", "nr", NDEBELE + W10, 0}, {"nepali", "ne", NEPALI + W10, 0}, {"no-bok", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, // Bokmaal {"no-bokmaal", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, {"no-nb", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, // Bokmaal {"no-no", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, {"no-nyn", "nn", NORWEGIAN_N + W10, NORWEGIAN - W4}, // Nynorsk {"no-nynorsk", "nn", NORWEGIAN_N + W10, NORWEGIAN - W4}, {"norwegian", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, {"norwegian_n", "nn", NORWEGIAN_N + W10, NORWEGIAN - W4}, {"nyanja", "ny", NYANJA + W10, 0}, {"occitan", "oc", OCCITAN + W10, 0}, {"oriya", "or", ORIYA + W10, 0}, {"oromo", "om", OROMO + W10, 0}, {"parsi", "fa", PERSIAN + W10, 0}, {"pashto", "ps", PASHTO + W10, 0}, {"pedi", "nso", PEDI + W10, 0}, {"persian", "fa", PERSIAN + W10, 0}, {"polish", "pl", POLISH + W10, 0}, {"polska", "pl", POLISH + W10, 0}, {"polski", "pl", POLISH + W10, 0}, {"portugu", "pt", PORTUGUESE + W10, 0}, // Truncated at non-ASCII {"portuguese", "pt", PORTUGUESE + W10, 0}, {"punjabi", "pa", PUNJABI + W10, 0}, {"quechua", "qu", QUECHUA + W10, 0}, {"rhaeto_romance", "rm", RHAETO_ROMANCE + W10, 0}, {"romanian", "ro", ROMANIAN + W10, 0}, {"rundi", "rn", RUNDI + W10, 0}, {"russian", "ru", RUSSIAN + W10, 0}, {"samoan", "sm", SAMOAN + W10, 0}, {"sango", "sg", SANGO + W10, 0}, {"sanskrit", "sa", SANSKRIT + W10, 0}, {"scots", "sco", SCOTS + W10, ENGLISH - W4}, {"scots_gaelic", "gd", SCOTS_GAELIC + W10, 0}, {"serbian", "sr", SERBIAN + W10, 0}, {"seselwa", "crs", SESELWA + W10, 0}, {"sesotho", "st", SESOTHO + W10, 0}, {"shift-jis", "ja", JAPANESE + W10, 0}, // Japanese encoding {"shift-js", "ja", JAPANESE + W10, 0}, // Japanese encoding {"shona", "sn", SHONA + W10, 0}, {"si-lk", "si", SINHALESE + W10, 0}, // 1:2 Sri Lanka, not ambiguous {"si-si", "sl", SLOVENIAN + W10, 0}, // 1:2 Slovenia, not ambiguous {"si-sl", "sl", SLOVENIAN + W10, 0}, // 1:2 Slovenia, not ambiguous {"sindhi", "sd", SINDHI + W10, 0}, {"sinhalese", "si", SINHALESE + W10, 0}, {"siswant", "ss", SISWANT + W10, 0}, {"sit-np", "sit", LIMBU + W10, 0}, {"slovak", "sk", SLOVAK + W10, CZECH - W4}, {"slovenian", "sl", SLOVENIAN + W10, 0}, {"somali", "so", SOMALI + W10, 0}, {"spanish", "es", SPANISH + W10, 0}, {"sr-me", "sr-me", MONTENEGRIN + W10, 0}, // Montenegrin => Montenegrin {"sundanese", "su", SUNDANESE + W10, 0}, {"suomi", "fi", FINNISH + W10, 0}, // Finnish {"swahili", "sw", SWAHILI + W10, 0}, {"swedish", "sv", SWEDISH + W10, 0}, {"syriac", "syr", SYRIAC + W10, 0}, {"tagalog", "tl", TAGALOG + W10, 0}, {"tajik", "tg", TAJIK + W10, 0}, {"tamil", "ta", TAMIL + W10, 0}, {"tatar", "tt", TATAR + W10, 0}, {"tb-tb", "bo", TIBETAN + W10, DZONGKHA - W4}, // Tibet {"tchinese", "zhT", CHINESE_T + W10, 0}, {"telugu", "te", TELUGU + W10, 0}, {"thai", "th", THAI + W10, 0}, {"tibetan", "bo", TIBETAN + W10, DZONGKHA - W4}, {"tigrinya", "ti", TIGRINYA + W10, 0}, {"tonga", "to", TONGA + W10, 0}, {"tsonga", "ts", TSONGA + W10, 0}, {"tswana", "tn", TSWANA + W10, 0}, {"tt-ru", "tt", TATAR + W10, 0}, {"tur-tr", "tr", TURKISH + W10, 0}, {"turkish", "tr", TURKISH + W10, 0}, {"turkmen", "tk", TURKMEN + W10, 0}, {"uighur", "ug", UIGHUR + W10, 0}, {"ukrainian", "uk", UKRAINIAN + W10, 0}, {"urdu", "ur", URDU + W10, 0}, {"uzbek", "uz", UZBEK + W10, 0}, {"venda", "ve", VENDA + W10, 0}, {"vietnam", "vi", VIETNAMESE + W10, 0}, {"vietnamese", "vi", VIETNAMESE + W10, 0}, {"volapuk", "vo", VOLAPUK + W10, 0}, {"welsh", "cy", WELSH + W10, 0}, {"wolof", "wo", WOLOF + W10, 0}, {"xhosa", "xh", XHOSA + W10, ZULU - W4}, {"yiddish", "yi", YIDDISH + W10, 0}, {"yoruba", "yo", YORUBA + W10, 0}, {"zh-classical", "zhT", CHINESE_T + W10, 0}, {"zh-cn", "zh", CHINESE + W10, 0}, {"zh-hans", "zh", CHINESE + W10, 0}, {"zh-hant", "zhT", CHINESE_T + W10, 0}, {"zh-hk", "zhT", CHINESE_T + W10, 0}, {"zh-min-nan", "zhT", CHINESE_T + W10, 0}, // Min Nan => ChineseT {"zh-sg", "zhT", CHINESE_T + W10, 0}, {"zh-tw", "zhT", CHINESE_T + W10, 0}, {"zh-yue", "zh", CHINESE + W10, 0}, // Yue (Cantonese) => Chinese {"zhuang", "za", ZHUANG + W10, 0}, {"zulu", "zu", ZULU + W10, XHOSA - W4}, }; // Table to look up lang= tags of two/three characters after truncate at hyphen // In alphabetical order for binary search static const int kCLDTable2Size = 257; static const LangTagLookup kCLDLangTagsHintTable2[kCLDTable2Size] = { {"aa", "aa", AFAR + W10, 0}, {"ab", "ab", ABKHAZIAN + W10, 0}, {"af", "af", AFRIKAANS + W10, 0}, {"ak", "ak", AKAN + W10, 0}, {"al", "sq", ALBANIAN + W10, 0}, // Albania {"am", "am,hy", AMHARIC + W10, ARMENIAN + W10}, // 1:2 Amharic Armenian {"ar", "ar", ARABIC + W10, 0}, {"ara", "ar", ARABIC + W10, 0}, {"arm", "hy", ARMENIAN + W10, 0}, // Armenia {"arz", "ar", ARABIC + W10, 0}, // Egyptian Arabic {"as", "as", ASSAMESE + W10, 0}, {"at", "de", GERMAN + W10, 0}, // Austria {"au", "de", GERMAN + W10, 0}, // Austria {"ay", "ay", AYMARA + W10, 0}, {"az", "az", AZERBAIJANI + W10, 0}, {"aze", "az", AZERBAIJANI + W10, 0}, {"ba", "ba,bs", BASHKIR + W10, BOSNIAN + W10}, // 1:2 Bashkir Bosnia {"be", "be", BELARUSIAN + W10, 0}, {"bel", "be", BELARUSIAN + W10, 0}, {"bg", "bg", BULGARIAN + W10, 0}, {"bh", "bh", BIHARI + W10, HINDI - W4}, {"bi", "bi", BISLAMA + W10, 0}, {"big", "zhT", CHINESE_T + W10, 0}, // Big5 encoding {"bm", "ms", MALAY + W10, INDONESIAN - W4}, // Bahasa Malaysia {"bn", "bn", BENGALI + W10, 0}, {"bo", "bo", TIBETAN + W10, DZONGKHA - W4}, // 1:2 Breton, Brazil country code, both Latn .br TLD enough for pt to win {"br", "br,pt", BRETON + W10, PORTUGUESE + W8}, // 1:2 Breton, Brazil {"bs", "bs", BOSNIAN + W10, 0}, // Bosnian => Bosnian {"ca", "ca", CATALAN + W10, 0}, {"cat", "ca", CATALAN + W10, 0}, {"ch", "de,fr", GERMAN + W10, FRENCH + W10}, // 1:2 Switzerland {"chn", "zh", CHINESE + W10, 0}, {"chr", "chr", CHEROKEE + W10, 0}, {"ckb", "ku", KURDISH + W10, 0}, // Central Kurdish {"cn", "zh,zhT", CHINESE + W6, CHINESE_T + W4}, // Ambiguous, so weaker. // Offset by 2 so that TLD=tw or // enc=big5 will put zhT ahead {"co", "co", CORSICAN + W10, 0}, {"cro", "hr", CROATIAN + W10, 0}, // Croatia {"crs", "crs", SESELWA + W10, 0}, {"cs", "cs", CZECH + W10, SLOVAK - W4}, {"ct", "ca", CATALAN + W10, 0}, {"cy", "cy", WELSH + W10, 0}, {"cym", "cy", WELSH + W10, 0}, {"cz", "cs", CZECH + W10, SLOVAK - W4}, {"da", "da", DANISH + W10, NORWEGIAN - W4}, {"dan", "da", DANISH + W10, NORWEGIAN - W4}, {"de", "de", GERMAN + W10, 0}, {"deu", "de", GERMAN + W10, 0}, {"div", "dv", DHIVEHI + W10, 0}, {"dk", "da", DANISH + W10, NORWEGIAN - W4}, // Denmark {"dut", "nl", DUTCH + W10, 0}, // Dutch {"dv", "dv", DHIVEHI + W10, 0}, {"dz", "dz", DZONGKHA + W10, TIBETAN - W4}, {"ee", "et", ESTONIAN + W10, 0}, // Estonia {"eg", "ar", ARABIC + W10, 0}, // Egypt {"el", "el", GREEK + W10, 0}, {"en", "en", ENGLISH + W4, 0}, {"eng", "en", ENGLISH + W4, 0}, {"eo", "eo", ESPERANTO + W10, 0}, {"er", "ur", URDU + W10, 0}, // "Erdu" {"es", "es", SPANISH + W10, 0}, {"esp", "es", SPANISH + W10, 0}, {"est", "et", ESTONIAN + W10, 0}, {"et", "et", ESTONIAN + W10, 0}, {"eu", "eu", BASQUE + W10, 0}, {"fa", "fa", PERSIAN + W10, 0}, {"far", "fa", PERSIAN + W10, 0}, {"fi", "fi", FINNISH + W10, 0}, {"fil", "tl", TAGALOG + W10, 0}, // Philippines {"fj", "fj", FIJIAN + W10, 0}, {"fo", "fo", FAROESE + W10, ICELANDIC - W4}, {"fr", "fr", FRENCH + W10, 0}, {"fra", "fr", FRENCH + W10, 0}, {"fre", "fr", FRENCH + W10, 0}, {"fy", "fy", FRISIAN + W10, 0}, {"ga", "ga,gl", IRISH + W10, GALICIAN + W10}, // 1:2 Irish, Galician {"gae", "gd,ga", SCOTS_GAELIC + W10, IRISH + W10}, // 1:2 Gaelic, either {"gal", "gl", GALICIAN + W10, 0}, {"gb", "zh", CHINESE + W10, 0}, // GB2312 encoding {"gbk", "zh", CHINESE + W10, 0}, // GBK encoding {"gd", "gd", SCOTS_GAELIC + W10, 0}, {"ge", "ka", GEORGIAN + W10, 0}, // Georgia {"geo", "ka", GEORGIAN + W10, 0}, {"ger", "de", GERMAN + W10, 0}, {"gl", "gl", GALICIAN + W10, 0}, // Also Greenland; hard to confuse {"gn", "gn", GUARANI + W10, 0}, {"gr", "el", GREEK + W10, 0}, // Greece {"gu", "gu", GUJARATI + W10, 0}, {"gv", "gv", MANX + W10, 0}, {"ha", "ha", HAUSA + W10, 0}, {"hat", "ht", HAITIAN_CREOLE + W10, 0}, // Haiti {"haw", "haw", HAWAIIAN + W10, 0}, {"hb", "he", HEBREW + W10, 0}, {"he", "he", HEBREW + W10, 0}, {"heb", "he", HEBREW + W10, 0}, {"hi", "hi", HINDI + W10, MARATHI - W4}, {"hk", "zhT", CHINESE_T + W10, 0}, // Hong Kong {"hr", "hr", CROATIAN + W10, 0}, {"ht", "ht", HAITIAN_CREOLE + W10, 0}, {"hu", "hu", HUNGARIAN + W10, 0}, {"hun", "hu", HUNGARIAN + W10, 0}, {"hy", "hy", ARMENIAN + W10, 0}, {"ia", "ia", INTERLINGUA + W10, 0}, {"ice", "is", ICELANDIC + W10, FAROESE - W4}, // Iceland {"id", "id", INDONESIAN + W10, MALAY - W4}, {"ids", "id", INDONESIAN + W10, MALAY - W4}, {"ie", "ie", INTERLINGUE + W10, 0}, {"ig", "ig", IGBO + W10, 0}, // 1:2 iu-Cans ik-Latn {"ik", "ik,iu", INUPIAK + W10, INUKTITUT + W10}, // 1:2 {"in", "id", INDONESIAN + W10, MALAY - W4}, {"ind", "id", INDONESIAN + W10, MALAY - W4}, // Indonesia {"inu", "iu,ik", INUKTITUT + W10, INUPIAK + W10}, // 1:2 {"is", "is", ICELANDIC + W10, FAROESE - W4}, {"it", "it", ITALIAN + W10, 0}, {"ita", "it", ITALIAN + W10, 0}, {"iu", "iu,ik", INUKTITUT + W10, INUPIAK + W10}, // 1:2 {"iw", "he", HEBREW + W10, 0}, {"ja", "ja", JAPANESE + W10, 0}, {"jp", "ja", JAPANESE + W10, 0}, // Japan {"jpn", "ja", JAPANESE + W10, 0}, {"jv", "jw", JAVANESE + W10, 0}, {"jw", "jw", JAVANESE + W10, 0}, {"ka", "ka", GEORGIAN + W10, 0}, {"kc", "qu", QUECHUA + W10, 0}, // (K)Quechua {"kg", "ky", KYRGYZ + W10, 0}, // Kyrgyzstan {"kh", "km", KHMER + W10, 0}, // Country code Khmer (Cambodia) {"kha", "kha", KHASI + W10, 0}, {"kk", "kk", KAZAKH + W10, 0}, // Kazakh {"kl", "kl", GREENLANDIC + W10, 0}, {"km", "km", KHMER + W10, 0}, {"kn", "kn", KANNADA + W10, 0}, {"ko", "ko", KOREAN + W10, 0}, {"kor", "ko", KOREAN + W10, 0}, {"kr", "ko", KOREAN + W10, 0}, // Country code Korea {"ks", "ks", KASHMIRI + W10, 0}, {"ksc", "ko", KOREAN + W10, 0}, // KSC encoding {"ku", "ku", KURDISH + W10, 0}, {"ky", "ky", KYRGYZ + W10, 0}, {"kz", "kk", KAZAKH + W10, 0}, // Kazakhstan {"la", "la", LATIN + W10, 0}, {"lao", "lo", LAOTHIAN + W10, 0}, // Laos {"lb", "lb", LUXEMBOURGISH + W10, 0}, {"lg", "lg", GANDA + W10, 0}, {"lit", "lt", LITHUANIAN + W10, 0}, {"ln", "ln", LINGALA + W10, 0}, {"lo", "lo", LAOTHIAN + W10, 0}, {"lt", "lt", LITHUANIAN + W10, 0}, {"ltu", "lt", LITHUANIAN + W10, 0}, {"lv", "lv", LATVIAN + W10, 0}, {"mfe", "mfe", MAURITIAN_CREOLE + W10, 0}, {"mg", "mg", MALAGASY + W10, 0}, {"mi", "mi", MAORI + W10, 0}, {"mk", "mk", MACEDONIAN + W10, 0}, {"ml", "ml", MALAYALAM + W10, 0}, {"mn", "mn", MONGOLIAN + W10, 0}, {"mo", "mo", ROMANIAN + W10, 0}, {"mon", "mn", MONGOLIAN + W10, 0}, // Mongolian {"mr", "mr", MARATHI + W10, HINDI - W4}, {"ms", "ms", MALAY + W10, INDONESIAN - W4}, {"mt", "mt", MALTESE + W10, 0}, {"mx", "es", SPANISH + W10, 0}, // Mexico {"my", "my,ms", BURMESE + W10, MALAY + W10}, // Myanmar, Malaysia {"na", "na", NAURU + W10, 0}, {"nb", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, {"ne", "ne", NEPALI + W10, 0}, {"nl", "nl", DUTCH + W10, 0}, {"nn", "nn", NORWEGIAN_N + W10, NORWEGIAN - W4}, {"no", "no", NORWEGIAN + W10, NORWEGIAN_N - W4}, {"nr", "nr", NDEBELE + W10, 0}, {"nso", "nso", PEDI + W10, 0}, {"ny", "ny", NYANJA + W10, 0}, {"oc", "oc", OCCITAN + W10, 0}, {"om", "om", OROMO + W10, 0}, {"or", "or", ORIYA + W10, 0}, {"pa", "pa,ps", PUNJABI + W10, PASHTO + W10}, // 1:2 pa-Guru ps-Arab {"per", "fa", PERSIAN + W10, 0}, {"ph", "tl", TAGALOG + W10, 0}, // Philippines {"pk", "ur", URDU + W10, 0}, // Pakistan {"pl", "pl", POLISH + W10, 0}, {"pnb", "pa", PUNJABI + W10, 0}, // Western Punjabi {"pol", "pl", POLISH + W10, 0}, {"por", "pt", PORTUGUESE + W10, 0}, {"ps", "ps", PASHTO + W10, 0}, {"pt", "pt", PORTUGUESE + W10, 0}, {"ptg", "pt", PORTUGUESE + W10, 0}, {"qc", "fr", FRENCH + W10, 0}, // Quebec "country" code {"qu", "qu", QUECHUA + W10, 0}, {"rm", "rm", RHAETO_ROMANCE + W10, 0}, {"rn", "rn", RUNDI + W10, 0}, {"ro", "ro", ROMANIAN + W10, 0}, {"rs", "sr", SERBIAN + W10, 0}, // Serbia country code {"ru", "ru", RUSSIAN + W10, 0}, {"rus", "ru", RUSSIAN + W10, 0}, {"rw", "rw", KINYARWANDA + W10, 0}, {"sa", "sa", SANSKRIT + W10, 0}, {"sco", "sco", SCOTS + W10, ENGLISH - W4}, {"sd", "sd", SINDHI + W10, 0}, {"se", "sv", SWEDISH + W10, 0}, {"sg", "sg", SANGO + W10, 0}, {"si", "si,sl", SINHALESE + W10, SLOVENIAN + W10}, // 1:2 Sinhalese, Slovinia {"sk", "sk", SLOVAK + W10, CZECH - W4}, {"sl", "sl", SLOVENIAN + W10, 0}, {"slo", "sl", SLOVENIAN + W10, 0}, {"sm", "sm", SAMOAN + W10, 0}, {"sn", "sn", SHONA + W10, 0}, {"so", "so", SOMALI + W10, 0}, {"sp", "es", SPANISH + W10, 0}, {"sq", "sq", ALBANIAN + W10, 0}, {"sr", "sr", SERBIAN + W10, 0}, {"srb", "sr", SERBIAN + W10, 0}, {"srl", "sr", SERBIAN + W10, 0}, // Serbian Latin {"srp", "sr", SERBIAN + W10, 0}, {"ss", "ss", SISWANT + W10, 0}, {"st", "st", SESOTHO + W10, 0}, {"su", "su", SUNDANESE + W10, 0}, {"sv", "sv", SWEDISH + W10, 0}, {"sve", "sv", SWEDISH + W10, 0}, {"sw", "sw", SWAHILI + W10, 0}, {"swe", "sv", SWEDISH + W10, 0}, {"sy", "syr", SYRIAC + W10, 0}, {"syr", "syr", SYRIAC + W10, 0}, {"ta", "ta", TAMIL + W10, 0}, {"te", "te", TELUGU + W10, 0}, {"tg", "tg", TAJIK + W10, 0}, {"th", "th", THAI + W10, 0}, {"ti", "ti,bo", TIGRINYA + W10, TIBETAN + W10}, // 1:2 Tigrinya, Tibet {"tj", "tg", TAJIK + W10, 0}, // Tajikistan {"tk", "tk", TURKMEN + W10, 0}, {"tl", "tl", TAGALOG + W10, 0}, {"tlh", "tlh", X_KLINGON + W10, 0}, {"tn", "tn", TSWANA + W10, 0}, {"to", "to", TONGA + W10, 0}, {"tr", "tr", TURKISH + W10, 0}, {"ts", "ts", TSONGA + W10, 0}, {"tt", "tt", TATAR + W10, 0}, {"tw", "ak,zhT", AKAN + W10, CHINESE_T + W10}, // 1:2 Twi => Akan, Taiwan {"twi", "ak", AKAN + W10, 0}, // Twi => Akan {"ua", "uk", UKRAINIAN + W10, 0}, // Ukraine {"ug", "ug", UIGHUR + W10, 0}, {"uk", "uk", UKRAINIAN + W10, 0}, {"ur", "ur", URDU + W10, 0}, {"uz", "uz", UZBEK + W10, 0}, {"va", "ca", CATALAN + W10, 0}, // Valencia => Catalan {"val", "ca", CATALAN + W10, 0}, // Valencia => Catalan {"ve", "ve", VENDA + W10, 0}, {"vi", "vi", VIETNAMESE + W10, 0}, {"vie", "vi", VIETNAMESE + W10, 0}, {"vn", "vi", VIETNAMESE + W10, 0}, {"vo", "vo", VOLAPUK + W10, 0}, {"wo", "wo", WOLOF + W10, 0}, {"xh", "xh", XHOSA + W10, ZULU - W4}, {"xho", "xh", XHOSA + W10, ZULU - W4}, {"yi", "yi", YIDDISH + W10, 0}, {"yo", "yo", YORUBA + W10, 0}, {"za", "za", ZHUANG + W10, 0}, {"zh", "zh", CHINESE + W10, 0}, {"zht", "zhT", CHINESE_T + W10, 0}, {"zu", "zu", ZULU + W10, XHOSA - W4}, }; // Possibly map to tl: // -LangTags tl-Latn /7val.com/ ,bcl 2 Central Bicolano // -LangTags tl-Latn /7val.com/ ,ceb 6 Cebuano // -LangTags tl-Latn /7val.com/ ,war 1 Waray // Table to look up country TLD (no general TLD) // In alphabetical order for binary search static const int kCLDTable3Size = 181; static const TLDLookup kCLDTLDHintTable[kCLDTable3Size] = { {"ac", JAPANESE + W2, 0}, {"ad", CATALAN + W4, 0}, {"ae", ARABIC + W4, 0}, {"af", PASHTO + W4, PERSIAN + W4}, {"ag", GERMAN + W2, 0}, // meager // {"ai", 0, 0}, // meager {"al", ALBANIAN + W4, 0}, {"am", ARMENIAN + W4, 0}, {"an", DUTCH + W4, 0}, // meager {"ao", PORTUGUESE + W4, 0}, // {"aq", 0, 0}, // meager {"ar", SPANISH + W4, 0}, // {"as", 0, 0}, {"at", GERMAN + W4, 0}, {"au", ENGLISH + W2, 0}, {"aw", DUTCH + W4, 0}, {"ax", SWEDISH + W4, 0}, {"az", AZERBAIJANI + W4, 0}, {"ba", BOSNIAN + W8, CROATIAN - W4}, // {"bb", 0, 0}, {"bd", BENGALI + W4, 0}, {"be", DUTCH + W4, FRENCH + W4}, {"bf", FRENCH + W4, 0}, {"bg", BULGARIAN + W4, 0}, {"bh", ARABIC + W4, 0}, {"bi", RUNDI + W4, FRENCH + W4}, {"bj", FRENCH + W4, 0}, {"bm", ENGLISH + W2, 0}, {"bn", MALAY + W4, INDONESIAN - W4}, {"bo", SPANISH + W4, AYMARA + W2}, // and GUARANI QUECHUA {"br", PORTUGUESE + W4, 0}, // {"bs", 0, 0}, {"bt", DZONGKHA + W10, TIBETAN - W10}, // Strong presumption of Dzongha {"bw", TSWANA + W4, 0}, {"by", BELARUSIAN + W4, 0}, // {"bz", 0, 0}, {"ca", FRENCH + W4, ENGLISH + W2}, {"cat", CATALAN + W4, 0}, {"cc", 0, 0}, {"cd", FRENCH + W4, 0}, {"cf", FRENCH + W4, 0}, {"cg", FRENCH + W4, 0}, {"ch", GERMAN + W4, FRENCH + W4}, {"ci", FRENCH + W4, 0}, // {"ck", 0, 0}, {"cl", SPANISH + W4, 0}, {"cm", FRENCH + W4, 0}, {"cn", CHINESE + W4, 0}, {"co", SPANISH + W4, 0}, {"cr", SPANISH + W4, 0}, {"cu", SPANISH + W4, 0}, {"cv", PORTUGUESE + W4, 0}, // {"cx", 0, 0}, {"cy", GREEK + W4, TURKISH + W4}, {"cz", CZECH + W4, SLOVAK - W4}, {"de", GERMAN + W4, 0}, {"dj", 0, 0}, {"dk", DANISH + W4, NORWEGIAN - W4}, {"dm", 0, 0}, {"do", SPANISH + W4, 0}, {"dz", FRENCH + W4, ARABIC + W4}, {"ec", SPANISH + W4, 0}, {"ee", ESTONIAN + W4, 0}, {"eg", ARABIC + W4, 0}, {"er", AFAR + W4, 0}, {"es", SPANISH + W4, 0}, {"et", AMHARIC + W4, AFAR + W4}, {"fi", FINNISH + W4, 0}, {"fj", FIJIAN + W4, 0}, // {"fk", 0, 0}, // {"fm", 0, 0}, {"fo", FAROESE + W4, ICELANDIC - W4}, {"fr", FRENCH + W4, 0}, {"ga", FRENCH + W4, 0}, {"gd", 0, 0}, {"ge", GEORGIAN + W4, 0}, {"gf", FRENCH + W4, 0}, // {"gg", 0, 0}, // {"gh", 0, 0}, // {"gi", 0, 0}, {"gl", GREENLANDIC + W4, DANISH + W4}, // {"gm", 0, 0}, {"gn", FRENCH + W4, 0}, // {"gp", 0, 0}, // {"gq", 0, 0}, {"gr", GREEK + W4, 0}, // {"gs", 0, 0}, {"gt", SPANISH + W4, 0}, // {"gu", 0, 0}, // {"gy", 0, 0}, {"hk", CHINESE_T + W4, 0}, // {"hm", 0, 0}, {"hn", SPANISH + W4, 0}, {"hr", CROATIAN + W8, BOSNIAN - W4}, {"ht", HAITIAN_CREOLE + W4, FRENCH + W4}, {"hu", HUNGARIAN + W4, 0}, {"id", INDONESIAN + W4, MALAY - W4}, {"ie", IRISH + W4, 0}, {"il", HEBREW + W4, 0}, {"im", MANX + W4, 0}, // {"in", 0, 0}, // {"io", 0, 0}, {"iq", ARABIC + W4, 0}, {"ir", PERSIAN + W4, 0}, {"is", ICELANDIC + W4, FAROESE - W4}, {"it", ITALIAN + W4, 0}, // {"je", 0, 0}, // {"jm", 0, 0}, {"jo", ARABIC + W4, 0}, {"jp", JAPANESE + W4, 0}, // {"ke", 0, 0}, {"kg", KYRGYZ + W4, 0}, {"kh", KHMER + W4, 0}, // {"ki", 0, 0}, {"km", FRENCH + W4, 0}, // {"kn", 0, 0}, {"kp", KOREAN + W4, 0}, {"kr", KOREAN + W4, 0}, {"kw", ARABIC + W4, 0}, // {"ky", 0, 0}, {"kz", KAZAKH + W4, 0}, {"la", LAOTHIAN + W4, 0}, {"lb", ARABIC + W4, FRENCH + W4}, // {"lc", 0, 0}, {"li", GERMAN + W4, 0}, {"lk", SINHALESE + W4, 0}, // {"lr", 0, 0}, {"ls", SESOTHO + W4, 0}, {"lt", LITHUANIAN + W4, 0}, {"lu", LUXEMBOURGISH + W4}, {"lv", LATVIAN + W4, 0}, {"ly", ARABIC + W4, 0}, {"ma", FRENCH + W4, 0}, {"mc", FRENCH + W4, 0}, {"md", ROMANIAN + W4, 0}, {"me", MONTENEGRIN + W8, SERBIAN - W4}, {"mg", FRENCH + W4, 0}, {"mk", MACEDONIAN + W4, 0}, {"ml", FRENCH + W4, 0}, {"mm", BURMESE + W4, 0}, {"mn", MONGOLIAN + W4, 0}, {"mo", CHINESE_T + W4, PORTUGUESE + W4}, // {"mp", 0, 0}, {"mq", FRENCH + W4, 0}, {"mr", FRENCH + W4, ARABIC + W4}, // {"ms", 0, 0}, {"mt", MALTESE + W4, 0}, // {"mu", 0, 0}, {"mv", DHIVEHI + W4, 0}, // {"mw", 0, 0}, {"mx", SPANISH + W4, 0}, {"my", MALAY + W4, INDONESIAN - W4}, {"mz", PORTUGUESE + W4, 0}, {"na", 0, 0}, // Namibia {"nc", FRENCH + W4, 0}, {"ne", FRENCH + W4, 0}, {"nf", FRENCH + W4, 0}, // {"ng", 0, 0}, {"ni", SPANISH + W4, 0}, {"nl", DUTCH + W4, 0}, {"no", NORWEGIAN + W4, NORWEGIAN_N + W2}, {"np", NEPALI + W4, 0}, {"nr", NAURU + W4, 0}, {"nu", SWEDISH + W4, 0}, {"nz", MAORI + W4, ENGLISH + W2}, {"om", ARABIC + W4, 0}, {"pa", SPANISH + W4, 0}, {"pe", SPANISH + W4, QUECHUA + W2}, // also AYMARA {"pf", FRENCH + W4, 0}, // {"pg", 0, 0}, {"ph", TAGALOG + W4, 0}, {"pk", URDU + W4, 0}, {"pl", POLISH + W4, 0}, // {"pn", 0, 0}, {"pr", SPANISH + W4, 0}, {"ps", ARABIC + W4, 0}, {"pt", PORTUGUESE + W4, 0}, {"py", SPANISH + W4, GUARANI + W2}, {"qa", ARABIC + W4, 0}, {"re", FRENCH + W4, 0}, {"ro", ROMANIAN + W4, 0}, {"rs", SERBIAN + W8, MONTENEGRIN - W4}, {"ru", RUSSIAN + W4, 0}, {"rw", KINYARWANDA + W4, FRENCH + W2}, {"sa", ARABIC + W4, 0}, // {"sb", 0, 0}, {"sc", SESELWA + W4, 0}, {"sd", ARABIC + W4, 0}, {"se", SWEDISH + W4, 0}, // {"sg", 0, 0}, // {"sh", 0, 0}, {"si", SLOVENIAN + W4, 0}, {"sk", SLOVAK + W4, CZECH - W4}, // {"sl", 0, 0}, {"sm", ITALIAN + W4, 0}, {"sn", FRENCH + W4, 0}, // {"sr", 0, 0}, {"ss", ARABIC + W4, 0}, // Presumed South Sudan TLD. dsites 2011.07.07 // {"st", 0, 0}, {"su", RUSSIAN + W4, 0}, {"sv", SPANISH + W4, 0}, {"sy", ARABIC + W4, 0}, // {"sz", 0, 0}, // {"tc", 0, 0}, {"td", FRENCH + W4, 0}, // {"tf", 0, 0}, {"tg", FRENCH + W4, 0}, {"th", THAI + W4, 0}, // Tibet has no country code (see .cn) {"tj", TAJIK + W4, 0}, // {"tk", 0, 0}, // {"tl", 0, 0}, {"tm", TURKISH + W4, 0}, {"tn", FRENCH + W4, ARABIC + W4}, // {"to", 0, 0}, {"tp", JAPANESE + W4, 0}, {"tr", TURKISH + W4, 0}, // {"tt", 0, 0}, // {"tv", 0, 0}, {"tw", CHINESE_T + W4, 0}, {"tz", SWAHILI + W4, AKAN + W4}, {"ua", UKRAINIAN + W4, 0}, {"ug", GANDA + W4, 0}, {"uk", ENGLISH + W2, 0}, {"us", ENGLISH + W2, 0}, {"uy", SPANISH + W4, 0}, {"uz", UZBEK + W4, 0}, {"va", ITALIAN + W4, LATIN + W2}, // {"vc", 0, 0}, {"ve", SPANISH + W4, 0}, // {"vg", 0, 0}, // {"vi", 0, 0}, {"vn", VIETNAMESE + W4, 0}, // {"vu", 0, 0}, {"wf", FRENCH + W4, 0}, // {"ws", 0, 0}, {"ye", ARABIC + W4, 0}, {"za", AFRIKAANS + W4, 0}, // {"zm", 0, 0}, // {"zw", 0, 0}, }; #undef W2 #undef W4 #undef W6 #undef W8 #undef W10 #undef W12 inline void SetCLDPriorWeight(int w, OneCLDLangPrior* olp) { *olp = (*olp & 0x3ff) + (w << 10); } inline void SetCLDPriorLang(Language lang, OneCLDLangPrior* olp) { *olp = (*olp & ~0x3ff) + lang; } OneCLDLangPrior PackCLDPriorLangWeight(Language lang, int w) { return (w << 10) + lang; } inline int MaxInt(int a, int b) { return (a >= b) ? a : b; } // Merge in another language prior, taking max if already there void MergeCLDLangPriorsMax(OneCLDLangPrior olp, CLDLangPriors* lps) { if (olp == 0) {return;} Language target_lang = GetCLDPriorLang(olp); for (int i = 0; i < lps->n; ++i) { if (GetCLDPriorLang(lps->prior[i]) == target_lang) { int new_weight = MaxInt(GetCLDPriorWeight(lps->prior[i]), GetCLDPriorWeight(olp)); SetCLDPriorWeight(new_weight, &lps->prior[i]); return; } } // Not found; add it if room if (lps->n >= kMaxOneCLDLangPrior) {return;} lps->prior[lps->n++] = olp; } // Merge in another language prior, boosting 10x if already there void MergeCLDLangPriorsBoost(OneCLDLangPrior olp, CLDLangPriors* lps) { if (olp == 0) {return;} Language target_lang = GetCLDPriorLang(olp); for (int i = 0; i < lps->n; ++i) { if (GetCLDPriorLang(lps->prior[i]) == target_lang) { int new_weight = GetCLDPriorWeight(lps->prior[i]) + 2; SetCLDPriorWeight(new_weight, &lps->prior[i]); return; } } // Not found; add it if room if (lps->n >= kMaxOneCLDLangPrior) {return;} lps->prior[lps->n++] = olp; } // Trim language priors to no more than max_entries, keeping largest abs weights void TrimCLDLangPriors(int max_entries, CLDLangPriors* lps) { if (lps->n <= max_entries) {return;} // Insertion sort in-place by abs(weight) for (int i = 0; i < lps->n; ++i) { OneCLDLangPrior temp_olp = lps->prior[i]; int w = abs(GetCLDPriorWeight(temp_olp)); int kk = i; for (; kk > 0; --kk) { if (abs(GetCLDPriorWeight(lps->prior[kk - 1])) < w) { // Move down and continue lps->prior[kk] = lps->prior[kk - 1]; } else { // abs(weight[kk - 1]) >= w, time to stop break; } } lps->prior[kk] = temp_olp; } lps->n = max_entries; } int CountCommas(const string& langtags) { int commas = 0; for (int i = 0; i < static_cast(langtags.size()); ++i) { if (langtags[i] == ',') {++commas;} } return commas; } // Binary lookup on language tag const LangTagLookup* DoLangTagLookup(const char* key, const LangTagLookup* tbl, int tbl_size) { // Key is always in range [lo..hi) int lo = 0; int hi = tbl_size; while (lo < hi) { int mid = (lo + hi) >> 1; int comp = strcmp(tbl[mid].langtag, key); if (comp < 0) { lo = mid + 1; } else if (comp > 0) { hi = mid; } else { return &tbl[mid]; } } return NULL; } // Binary lookup on tld const TLDLookup* DoTLDLookup(const char* key, const TLDLookup* tbl, int tbl_size) { // Key is always in range [lo..hi) int lo = 0; int hi = tbl_size; while (lo < hi) { int mid = (lo + hi) >> 1; int comp = strcmp(tbl[mid].tld, key); if (comp < 0) { lo = mid + 1; } else if (comp > 0) { hi = mid; } else { return &tbl[mid]; } } return NULL; } // Trim language tag string to canonical form for each language // Input is from GetLangTagsFromHtml(), already lowercased string TrimCLDLangTagsHint(const string& langtags) { string retval; if (langtags.empty()) {return retval;} int commas = CountCommas(langtags); if (commas > 4) {return retval;} // Ignore if too many language tags char temp[20]; int pos = 0; while (pos < static_cast(langtags.size())) { int comma = langtags.find(',', pos); if (comma == string::npos) {comma = langtags.size();} // fake trailing comma int len = comma - pos; if (len <= 16) { // Short enough to use memcpy(temp, &langtags[pos], len); temp[len] = '\0'; const LangTagLookup* entry = DoLangTagLookup(temp, kCLDLangTagsHintTable1, kCLDTable1Size); if (entry != NULL) { // First table hit retval.append(entry->langcode); // may be "code1,code2" retval.append(1, ','); } else { // Try second table with language code truncated at first hyphen char* hyphen = strchr(temp, '-'); if (hyphen != NULL) {*hyphen = '\0';} len = strlen(temp); if (len <= 3) { // Short enough to use entry = DoLangTagLookup(temp, kCLDLangTagsHintTable2, kCLDTable2Size); if (entry != NULL) { // Second table hit retval.append(entry->langcode); // may be "code1,code2" retval.append(1, ','); } } } } pos = comma + 1; } // Remove trainling comma, if any if (!retval.empty()) {retval.resize(retval.size() - 1);} return retval; } //============================================================================== // Little state machine to scan insides of language attribute quoted-string. // Each language code is lowercased and copied to the output string. Underscore // is mapped to minus. Space, tab, and comma are all mapped to comma, and // multiple consecutive commas are removed. // Each language code in the output list will be followed by a single comma. // There are three states, and we start in state 1: // State 0: After a letter. // Copy all letters/minus[0], copy comma[1]; all others copy comma and skip [2] // State 1: Just after a comma. // Copy letter [0], Ignore subsequent commas[1]. minus and all others skip [2] // State 2: Skipping. // All characters except comma skip and stay in [2]. comma goes to [1] // The thing that is copied is kLangCodeRemap[c] when going to state 0, // and always comma when going to state 1 or 2. The design depends on copying // a comma at the *beginning* of skipping, and in state 2 never doing a copy. // We pack all this into 8 bits: // +--+---+---+ // |78|654|321| // +--+---+---+ // // Shift byte right by 3*state, giving [0] 321, [1] 654, [2] .78 // where . is always zero // Of these 3 bits, low two are next state ss, high bit is copy bit C. // If C=1 and ss == 0, copy kLangCodeRemap[c], else copy a comma #define SKIP0 0 #define SKIP1 1 #define SKIP2 2 #define COPY0 4 // copy kLangCodeRemap[c] #define COPY1 5 // copy ',' #define COPY2 6 // copy ',' // These combined actions pack three states into one byte. // Ninth bit must be zero, so all state 2 values must be skips. // state[2] state[1] state[0] #define LTR ((SKIP2 << 6) + (COPY0 << 3) + COPY0) #define MINUS ((SKIP2 << 6) + (COPY2 << 3) + COPY0) #define COMMA ((SKIP1 << 6) + (SKIP1 << 3) + COPY1) #define Bad ((SKIP2 << 6) + (COPY2 << 3) + COPY2) // Treat as letter: a-z, A-Z // Treat as minus: 2D minus, 5F underscore // Treat as comma: 09 tab, 20 space, 2C comma static const unsigned char kLangCodeAction[256] = { Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,COMMA,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, COMMA,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,COMMA,MINUS,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,Bad,Bad,Bad,Bad,MINUS, Bad,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,LTR,LTR,LTR,LTR,LTR, LTR,LTR,LTR,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, Bad,Bad,Bad,Bad,Bad,Bad,Bad,Bad, }; // This does lowercasing, maps underscore to minus, and maps tab/space to comma static const unsigned char kLangCodeRemap[256] = { 0,0,0,0,0,0,0,0, 0,',',0,0,0,0,0,0, // 09 tab 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, ',',0,0,0,0,0,0,0, 0,0,0,0,',','-',0,0, // 20 space 2C comma 2D minus 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,'a','b','c','d','e','f','g', 'h','i','j','k','l','m','n','o', 'p','q','r','s','t','u','v','w', 'x','y','z',0,0,0,0,'-', // 5F underscore 0,'a','b','c','d','e','f','g', 'h','i','j','k','l','m','n','o', 'p','q','r','s','t','u','v','w', 'x','y','z',0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, }; #undef LTR #undef MINUS #undef COMMA #undef Bad #undef SKIP0 #undef SKIP1 #undef SKIP2 #undef COPY0 #undef COPY1 #undef COPY2 // Find opening '<' for HTML tag // Note: this is all somewhat insensitive to mismatched quotes int32 FindTagStart(const char* utf8_body, int32 pos, int32 max_pos) { int i = pos; // Advance i by 4 if none of the next 4 bytes are '<' for (i = pos; i < (max_pos - 3); i += 4) { // Fast check for any < const char* p = &utf8_body[i]; uint32 s0123 = UNALIGNED_LOAD32(p); uint32 temp = s0123 ^ 0x3c3c3c3c; // <<<< if (((temp - 0x01010101) & (~temp & 0x80808080)) != 0) { // At least one byte is '<' break; } } // Continue, advancing i by 1 for (; i < max_pos; ++i) { if (utf8_body[i] == '<') {return i;} } return -1; } // Find closing '>' for HTML tag. Also stop on < and & (simplistic parsing) int32 FindTagEnd(const char* utf8_body, int32 pos, int32 max_pos) { // Always outside quotes for (int i = pos; i < max_pos; ++i) { char c = utf8_body[i]; if (c == '>') {return i;} if (c == '<') {return i - 1;} if (c == '&') {return i - 1;} } return -1; // nothing found } // Find opening quote or apostrophe, skipping spaces // Note: this is all somewhat insensitive to mismatched quotes int32 FindQuoteStart(const char* utf8_body, int32 pos, int32 max_pos) { for (int i = pos; i < max_pos; ++i) { char c = utf8_body[i]; if (c == '"') {return i;} if (c == '\'') {return i;} if (c != ' ') {return -1;} } return -1; } // Find closing quot/apos. Also stop on = > < and & (simplistic parsing) int32 FindQuoteEnd(const char* utf8_body, int32 pos, int32 max_pos) { // Always outside quotes for (int i = pos; i < max_pos; ++i) { char c = utf8_body[i]; if (c == '"') {return i;} if (c == '\'') {return i;} if (c == '>') {return i - 1;} if (c == '=') {return i - 1;} if (c == '<') {return i - 1;} if (c == '&') {return i - 1;} } return -1; // nothing found } int32 FindEqualSign(const char* utf8_body, int32 pos, int32 max_pos) { // Outside quotes/apostrophes loop for (int i = pos; i < max_pos; ++i) { char c = utf8_body[i]; if (c == '=') { // Found bare equal sign inside tag return i; } else if (c == '"') { // Inside quotes loop int j; for (j = i + 1; j < max_pos; ++j) { if (utf8_body[j] == '"') { break; } else if (utf8_body[j] == '\\') { ++j; } } i = j; } else if (c == '\'') { // Inside apostrophes loop int j; for (j = i + 1; j < max_pos; ++j) { if (utf8_body[j] == '\'') { break; } else if (utf8_body[j] == '\\') { ++j; } } i = j; } } return -1; // nothing found } // Scan backwards for case-insensitive string s in [min_pos..pos) // Bytes of s must already be lowercase, i.e. in [20..3f] or [60..7f] // Cheap lowercase. Control codes will masquerade as 20..3f bool FindBefore(const char* utf8_body, int32 min_pos, int32 pos, const char* s) { int len = strlen(s); if ((pos - min_pos) < len) {return false;} // Too small to fit s // Skip trailing spaces int i = pos; while ((i > (min_pos + len)) && (utf8_body[i - 1] == ' ')) {--i;} i -= len; if (i < min_pos) {return false;} // pos - min_pos < len, so s can't be found const char* p = &utf8_body[i]; for (int j = 0; j < len; ++j) { if ((p[j] | 0x20) != s[j]) {return false;} // Unequal byte } return true; // All bytes equal at i } // Scan forwards for case-insensitive string s in [pos..max_pos) // Bytes of s must already be lowercase, i.e. in [20..3f] or [60..7f] // Cheap lowercase. Control codes will masquerade as 20..3f // Allows but does not require quoted/apostrophe string bool FindAfter(const char* utf8_body, int32 pos, int32 max_pos, const char* s) { int len = strlen(s); if ((max_pos - pos) < len) {return false;} // Too small to fit s // Skip leading spaces, quote, apostrophe int i = pos; while (i < (max_pos - len)) { unsigned char c = utf8_body[i]; if ((c == ' ') || (c == '"') || (c == '\'')) {++i;} else {break;} } const char* p = &utf8_body[i]; for (int j = 0; j < len; ++j) { if ((p[j] | 0x20) != s[j]) {return false;} // Unequal byte } return true; // All bytes equal } // Copy attribute value in [pos..max_pos) // pos is just after an opening quote/apostrophe and max_pos is the ending one // String must all be on a single line. // Return slightly-normalized language list, empty or ending in comma // Does lowercasing and removes excess punctuation/space string CopyOneQuotedString(const char* utf8_body, int32 pos, int32 max_pos) { string s; int state = 1; // Front is logically just after a comma for (int i = pos; i < max_pos; ++i) { unsigned char c = utf8_body[i]; int e = kLangCodeAction[c] >> (3 * state); state = e & 3; // Update to next state if ((e & 4) != 0) { // Copy a remapped byte if going to state 0, else copy a comma if (state == 0) { s.append(1, kLangCodeRemap[c]); } else { s.append(1, ','); } } } // Add final comma if needed if (state == 0) { s.append(1, ','); } return s; } // Find and copy attribute value: quoted string in [pos..max_pos) // Return slightly-normalized language list, empty or ending in comma string CopyQuotedString(const char* utf8_body, int32 pos, int32 max_pos) { int32 start_quote = FindQuoteStart(utf8_body, pos, max_pos); if (start_quote < 0) {return string("");} int32 end_quote = FindQuoteEnd(utf8_body, start_quote + 1, max_pos); if (end_quote < 0) {return string("");} return CopyOneQuotedString(utf8_body, start_quote + 1, end_quote); } // Add hints to vector of langpriors // Input is from GetLangTagsFromHtml(), already lowercased void SetCLDLangTagsHint(const string& langtags, CLDLangPriors* langpriors) { if (langtags.empty()) {return;} int commas = CountCommas(langtags); if (commas > 4) {return;} // Ignore if too many language tags char temp[20]; int pos = 0; while (pos < static_cast(langtags.size())) { int comma = langtags.find(',', pos); if (comma == string::npos) {comma = langtags.size();} // fake trailing comma int len = comma - pos; if (len <= 16) { // Short enough to use memcpy(temp, &langtags[pos], len); temp[len] = '\0'; const LangTagLookup* entry = DoLangTagLookup(temp, kCLDLangTagsHintTable1, kCLDTable1Size); if (entry != NULL) { // First table hit MergeCLDLangPriorsMax(entry->onelangprior1, langpriors); MergeCLDLangPriorsMax(entry->onelangprior2, langpriors); } else { // Try second table with language code truncated at first hyphen char* hyphen = strchr(temp, '-'); if (hyphen != NULL) {*hyphen = '\0';} len = strlen(temp); if (len <= 3) { // Short enough to use entry = DoLangTagLookup(temp, kCLDLangTagsHintTable2, kCLDTable2Size); if (entry != NULL) { // Second table hit MergeCLDLangPriorsMax(entry->onelangprior1, langpriors); MergeCLDLangPriorsMax(entry->onelangprior2, langpriors); } } } } pos = comma + 1; } } // Add hints to vector of langpriors // Input is string after HTTP header Content-Language: void SetCLDContentLangHint(const char* contentlang, CLDLangPriors* langpriors) { string langtags = CopyOneQuotedString(contentlang, 0, strlen(contentlang)); SetCLDLangTagsHint(langtags, langpriors); } // Add hints to vector of langpriors // Input is last element of hostname (no dot), e.g. from GetTLD() void SetCLDTLDHint(const char* tld, CLDLangPriors* langpriors) { int len = strlen(tld); if (len > 3) {return;} // Ignore if more than three letters char local_tld[4]; strncpy(local_tld, tld, 4); local_tld[3] = '\0'; // Safety move // Lowercase for (int i = 0; i < len; ++i) {local_tld[i] |= 0x20;} const TLDLookup* entry = DoTLDLookup(local_tld, kCLDTLDHintTable, kCLDTable3Size); if (entry != NULL) { // Table hit MergeCLDLangPriorsBoost(entry->onelangprior1, langpriors); MergeCLDLangPriorsBoost(entry->onelangprior2, langpriors); } } // Add hints to vector of langpriors // Input is from DetectEncoding() void SetCLDEncodingHint(Encoding enc, CLDLangPriors* langpriors) { OneCLDLangPrior olp; switch (enc) { case CHINESE_GB: case GBK: case GB18030: case ISO_2022_CN: case HZ_GB_2312: olp = PackCLDPriorLangWeight(CHINESE, kCLDPriorEncodingWeight); MergeCLDLangPriorsBoost(olp, langpriors); break; case CHINESE_BIG5: case CHINESE_BIG5_CP950: case BIG5_HKSCS: olp = PackCLDPriorLangWeight(CHINESE_T, kCLDPriorEncodingWeight); MergeCLDLangPriorsBoost(olp, langpriors); break; case JAPANESE_EUC_JP: case JAPANESE_SHIFT_JIS: case JAPANESE_CP932: case JAPANESE_JIS: // ISO-2022-JP olp = PackCLDPriorLangWeight(JAPANESE, kCLDPriorEncodingWeight); MergeCLDLangPriorsBoost(olp, langpriors); break; case KOREAN_EUC_KR: case ISO_2022_KR: olp = PackCLDPriorLangWeight(KOREAN, kCLDPriorEncodingWeight); MergeCLDLangPriorsBoost(olp, langpriors); break; default: break; } } // Add hints to vector of langpriors // Input is from random source void SetCLDLanguageHint(Language lang, CLDLangPriors* langpriors) { OneCLDLangPrior olp = PackCLDPriorLangWeight(lang, kCLDPriorLanguageWeight); MergeCLDLangPriorsBoost(olp, langpriors); } // Make printable string of priors string DumpCLDLangPriors(const CLDLangPriors* langpriors) { string retval; for (int i = 0; i < langpriors->n; ++i) { char temp[64]; sprintf(temp, "%s.%d ", LanguageCode(GetCLDPriorLang(langpriors->prior[i])), GetCLDPriorWeight(langpriors->prior[i])); retval.append(temp); } return retval; } // Look for // // // // // // // // // Do not trigger on // // // // // // Stop fairly quickly on mismatched quotes // // Allowed language characters // a-z A-Z -_ , space\t // Think about: GB2312, big5, shift-jis, euc-jp, ksc euc-kr // zh-hans zh-TW cmn-Hani zh_cn.gb18030_CN zh-min-nan zh-yue // de-x-mtfrom-en zh-tw-x-mtfrom-en (machine translation) // GB2312 => gb // Big5 => big // zh_CN.gb18030_C => zh-cn // // Remove duplicates and extra spaces as we go // Lowercase as we go. // Get language tag hints from HTML body // Normalize: remove spaces and make lowercase comma list string GetLangTagsFromHtml(const char* utf8_body, int32 utf8_body_len, int32 max_scan_bytes) { string retval; if (max_scan_bytes > utf8_body_len) { max_scan_bytes = utf8_body_len; } int32 k = 0; while (k < max_scan_bytes) { int32 start_tag = FindTagStart(utf8_body, k, max_scan_bytes); if (start_tag < 0) {break;} int32 end_tag = FindTagEnd(utf8_body, start_tag + 1, max_scan_bytes); // FindTagEnd exits on < > & if (end_tag < 0) {break;} // Skip