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1 /***** This file contains automatically generated code ****** |
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2 ** |
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3 ** The code in this file has been automatically generated by |
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4 ** |
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5 ** $Header: /sqlite/sqlite/tool/mkkeywordhash.c,v 1.31 2007/07/30 18:26:20 rse Exp $ |
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6 ** |
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7 ** The code in this file implements a function that determines whether |
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8 ** or not a given identifier is really an SQL keyword. The same thing |
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9 ** might be implemented more directly using a hand-written hash table. |
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10 ** But by using this automatically generated code, the size of the code |
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11 ** is substantially reduced. This is important for embedded applications |
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12 ** on platforms with limited memory. |
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13 */ |
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14 /* Hash score: 165 */ |
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15 static int keywordCode(const char *z, int n){ |
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16 /* zText[] encodes 775 bytes of keywords in 526 bytes */ |
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17 static const char zText[526] = |
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18 "BEFOREIGNOREGEXPLAINSTEADDESCAPEACHECKEYCONSTRAINTERSECTABLEFT" |
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19 "HENDATABASELECTRANSACTIONATURALTERAISELSEXCEPTRIGGEREFERENCES" |
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20 "UNIQUERYATTACHAVINGROUPDATEMPORARYBEGINNEREINDEXCLUSIVEXISTSBETWEEN" |
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21 "OTNULLIKECASCADEFERRABLECASECOLLATECREATECURRENT_DATEDELETEDETACH" |
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22 "IMMEDIATEJOINSERTMATCHPLANALYZEPRAGMABORTVALUESVIRTUALIMITWHEN" |
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23 "WHERENAMEAFTEREPLACEANDEFAULTAUTOINCREMENTCASTCOLUMNCOMMITCONFLICT" |
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24 "CROSSCURRENT_TIMESTAMPRIMARYDEFERREDISTINCTDROPFAILFROMFULLGLOB" |
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25 "YIFINTOFFSETISNULLORDERESTRICTOUTERIGHTROLLBACKROWUNIONUSINGVACUUM" |
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26 "VIEWINITIALLY"; |
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27 static const unsigned char aHash[127] = { |
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28 63, 92, 109, 61, 0, 38, 0, 0, 69, 0, 64, 0, 0, |
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29 102, 4, 65, 7, 0, 108, 72, 103, 99, 0, 22, 0, 0, |
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30 113, 0, 111, 106, 0, 18, 80, 0, 1, 0, 0, 56, 57, |
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31 0, 55, 11, 0, 33, 77, 89, 0, 110, 88, 0, 0, 45, |
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32 0, 90, 54, 0, 20, 0, 114, 34, 19, 0, 10, 97, 28, |
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33 83, 0, 0, 116, 93, 47, 115, 41, 12, 44, 0, 78, 0, |
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34 87, 29, 0, 86, 0, 0, 0, 82, 79, 84, 75, 96, 6, |
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35 14, 95, 0, 68, 0, 21, 76, 98, 27, 0, 112, 67, 104, |
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36 49, 40, 71, 0, 0, 81, 100, 0, 107, 0, 15, 0, 0, |
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37 24, 0, 73, 42, 50, 0, 16, 48, 0, 37, |
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38 }; |
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39 static const unsigned char aNext[116] = { |
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40 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, |
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41 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, |
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42 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, |
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43 17, 0, 0, 0, 36, 39, 0, 0, 25, 0, 0, 31, 0, |
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44 0, 0, 43, 52, 0, 0, 0, 53, 0, 0, 0, 0, 0, |
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45 0, 0, 0, 0, 51, 0, 0, 0, 0, 26, 0, 8, 46, |
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46 2, 0, 0, 0, 0, 0, 0, 0, 3, 58, 66, 0, 13, |
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47 0, 91, 85, 0, 94, 0, 74, 0, 0, 62, 0, 35, 101, |
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48 0, 0, 105, 23, 30, 60, 70, 0, 0, 59, 0, 0, |
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49 }; |
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50 static const unsigned char aLen[116] = { |
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51 6, 7, 3, 6, 6, 7, 7, 3, 4, 6, 4, 5, 3, |
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52 10, 9, 5, 4, 4, 3, 8, 2, 6, 11, 2, 7, 5, |
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53 5, 4, 6, 7, 10, 6, 5, 6, 6, 5, 6, 4, 9, |
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54 2, 5, 5, 7, 5, 9, 6, 7, 7, 3, 4, 4, 7, |
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55 3, 10, 4, 7, 6, 12, 6, 6, 9, 4, 6, 5, 4, |
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56 7, 6, 5, 6, 7, 5, 4, 5, 6, 5, 7, 3, 7, |
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57 13, 2, 2, 4, 6, 6, 8, 5, 17, 12, 7, 8, 8, |
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58 2, 4, 4, 4, 4, 4, 2, 2, 4, 6, 2, 3, 6, |
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59 5, 8, 5, 5, 8, 3, 5, 5, 6, 4, 9, 3, |
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60 }; |
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61 static const unsigned short int aOffset[116] = { |
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62 0, 2, 2, 6, 10, 13, 18, 23, 25, 26, 31, 33, 37, |
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63 40, 47, 55, 58, 61, 63, 65, 70, 71, 76, 85, 86, 91, |
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64 95, 99, 102, 107, 113, 123, 126, 131, 136, 141, 144, 148, 148, |
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65 152, 157, 160, 164, 166, 169, 177, 183, 189, 189, 192, 195, 199, |
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66 200, 204, 214, 218, 225, 231, 243, 249, 255, 264, 266, 272, 277, |
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67 279, 286, 291, 296, 302, 308, 313, 317, 320, 326, 330, 337, 339, |
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68 346, 348, 350, 359, 363, 369, 375, 383, 388, 388, 404, 411, 418, |
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69 419, 426, 430, 434, 438, 442, 445, 447, 449, 452, 452, 455, 458, |
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70 464, 468, 476, 480, 485, 493, 496, 501, 506, 512, 516, 521, |
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71 }; |
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72 static const unsigned char aCode[116] = { |
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73 TK_BEFORE, TK_FOREIGN, TK_FOR, TK_IGNORE, TK_LIKE_KW, |
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74 TK_EXPLAIN, TK_INSTEAD, TK_ADD, TK_DESC, TK_ESCAPE, |
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75 TK_EACH, TK_CHECK, TK_KEY, TK_CONSTRAINT, TK_INTERSECT, |
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76 TK_TABLE, TK_JOIN_KW, TK_THEN, TK_END, TK_DATABASE, |
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77 TK_AS, TK_SELECT, TK_TRANSACTION,TK_ON, TK_JOIN_KW, |
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78 TK_ALTER, TK_RAISE, TK_ELSE, TK_EXCEPT, TK_TRIGGER, |
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79 TK_REFERENCES, TK_UNIQUE, TK_QUERY, TK_ATTACH, TK_HAVING, |
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80 TK_GROUP, TK_UPDATE, TK_TEMP, TK_TEMP, TK_OR, |
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81 TK_BEGIN, TK_JOIN_KW, TK_REINDEX, TK_INDEX, TK_EXCLUSIVE, |
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82 TK_EXISTS, TK_BETWEEN, TK_NOTNULL, TK_NOT, TK_NULL, |
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83 TK_LIKE_KW, TK_CASCADE, TK_ASC, TK_DEFERRABLE, TK_CASE, |
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84 TK_COLLATE, TK_CREATE, TK_CTIME_KW, TK_DELETE, TK_DETACH, |
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85 TK_IMMEDIATE, TK_JOIN, TK_INSERT, TK_MATCH, TK_PLAN, |
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86 TK_ANALYZE, TK_PRAGMA, TK_ABORT, TK_VALUES, TK_VIRTUAL, |
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87 TK_LIMIT, TK_WHEN, TK_WHERE, TK_RENAME, TK_AFTER, |
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88 TK_REPLACE, TK_AND, TK_DEFAULT, TK_AUTOINCR, TK_TO, |
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89 TK_IN, TK_CAST, TK_COLUMNKW, TK_COMMIT, TK_CONFLICT, |
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90 TK_JOIN_KW, TK_CTIME_KW, TK_CTIME_KW, TK_PRIMARY, TK_DEFERRED, |
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91 TK_DISTINCT, TK_IS, TK_DROP, TK_FAIL, TK_FROM, |
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92 TK_JOIN_KW, TK_LIKE_KW, TK_BY, TK_IF, TK_INTO, |
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93 TK_OFFSET, TK_OF, TK_SET, TK_ISNULL, TK_ORDER, |
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94 TK_RESTRICT, TK_JOIN_KW, TK_JOIN_KW, TK_ROLLBACK, TK_ROW, |
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95 TK_UNION, TK_USING, TK_VACUUM, TK_VIEW, TK_INITIALLY, |
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96 TK_ALL, |
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97 }; |
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98 int h, i; |
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99 if( n<2 ) return TK_ID; |
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100 h = ((charMap(z[0])*4) ^ |
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101 (charMap(z[n-1])*3) ^ |
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102 n) % 127; |
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103 for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){ |
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104 if( aLen[i]==n && sqlite3StrNICmp(&zText[aOffset[i]],z,n)==0 ){ |
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105 return aCode[i]; |
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106 } |
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107 } |
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108 return TK_ID; |
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109 } |
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110 int sqlite3KeywordCode(const unsigned char *z, int n){ |
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111 return keywordCode((char*)z, n); |
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112 } |