520 lines
17 KiB
C
520 lines
17 KiB
C
/*
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** 2001 September 15
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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** An tokenizer for SQL
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**
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** This file contains C code that splits an SQL input string up into
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** individual tokens and sends those tokens one-by-one over to the
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** parser for analysis.
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*/
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wine/unicode.h"
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#include "query.h"
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#include "sql.tab.h"
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/*
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** All the keywords of the SQL language are stored as in a hash
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** table composed of instances of the following structure.
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*/
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typedef struct Keyword Keyword;
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struct Keyword {
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const WCHAR *zName; /* The keyword name */
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int tokenType; /* The token value for this keyword */
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};
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#define MAX_TOKEN_LEN 11
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static const WCHAR ABORT_W[] = { 'A','B','O','R','T',0 };
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static const WCHAR AFTER_W[] = { 'A','F','T','E','R',0 };
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static const WCHAR ALTER_W[] = { 'A','L','T','E','R',0 };
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static const WCHAR ALL_W[] = { 'A','L','L',0 };
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static const WCHAR AND_W[] = { 'A','N','D',0 };
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static const WCHAR AS_W[] = { 'A','S',0 };
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static const WCHAR ASC_W[] = { 'A','S','C',0 };
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static const WCHAR BEFORE_W[] = { 'B','E','F','O','R','E',0 };
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static const WCHAR BEGIN_W[] = { 'B','E','G','I','N','W',0 };
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static const WCHAR BETWEEN_W[] = { 'B','E','T','W','E','E','N',0 };
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static const WCHAR BY_W[] = { 'B','Y',0 };
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static const WCHAR CASCADE_W[] = { 'C','A','S','C','A','D','E',0 };
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static const WCHAR CASE_W[] = { 'C','A','S','E',0 };
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static const WCHAR CHAR_W[] = { 'C','H','A','R',0 };
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static const WCHAR CHARACTER_W[] = { 'C','H','A','R','A','C','T','E','R',0 };
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static const WCHAR CHECK_W[] = { 'C','H','E','C','K',0 };
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static const WCHAR CLUSTER_W[] = { 'C','L','U','S','T','E','R',0 };
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static const WCHAR COLLATE_W[] = { 'C','O','L','L','A','T','E',0 };
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static const WCHAR COMMIT_W[] = { 'C','O','M','M','I','T',0 };
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static const WCHAR CONFLICT_W[] = { 'C','O','N','F','L','I','C','T',0 };
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static const WCHAR CONSTRAINT_W[] = { 'C','O','N','S','T','R','A','I','N','T',0 };
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static const WCHAR COPY_W[] = { 'C','O','P','Y',0 };
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static const WCHAR CREATE_W[] = { 'C','R','E','A','T','E',0 };
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static const WCHAR CROSS_W[] = { 'C','R','O','S','S',0 };
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static const WCHAR DEFAULT_W[] = { 'D','E','F','A','U','L','T',0 };
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static const WCHAR DEFERRED_W[] = { 'D','E','F','E','R','R','E','D',0 };
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static const WCHAR DEFERRABLE_W[] = { 'D','E','F','E','R','R','A','B','L','E',0 };
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static const WCHAR DELETE_W[] = { 'D','E','L','E','T','E',0 };
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static const WCHAR DELIMITERS_W[] = { 'D','E','L','I','M','I','T','E','R','S',0 };
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static const WCHAR DESC_W[] = { 'D','E','S','C',0 };
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static const WCHAR DISTINCT_W[] = { 'D','I','S','T','I','N','C','T',0 };
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static const WCHAR DROP_W[] = { 'D','R','O','P',0 };
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static const WCHAR END_W[] = { 'E','N','D',0 };
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static const WCHAR EACH_W[] = { 'E','A','C','H',0 };
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static const WCHAR ELSE_W[] = { 'E','L','S','E',0 };
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static const WCHAR EXCEPT_W[] = { 'E','X','C','E','P','T',0 };
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static const WCHAR EXPLAIN_W[] = { 'E','X','P','L','A','I','N',0 };
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static const WCHAR FAIL_W[] = { 'F','A','I','L',0 };
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static const WCHAR FOR_W[] = { 'F','O','R',0 };
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static const WCHAR FOREIGN_W[] = { 'F','O','R','E','I','G','N',0 };
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static const WCHAR FREE_W[] = { 'F','R','E','E',0 };
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static const WCHAR FROM_W[] = { 'F','R','O','M',0 };
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static const WCHAR FULL_W[] = { 'F','U','L','L',0 };
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static const WCHAR GLOB_W[] = { 'G','L','O','B',0 };
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static const WCHAR GROUP_W[] = { 'G','R','O','U','P',0 };
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static const WCHAR HAVING_W[] = { 'H','A','V','I','N','G',0 };
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static const WCHAR HOLD_W[] = { 'H','O','L','D',0 };
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static const WCHAR IGNORE_W[] = { 'I','G','N','O','R','E',0 };
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static const WCHAR IMMEDIATE_W[] = { 'I','M','M','E','D','I','A','T','E',0 };
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static const WCHAR IN_W[] = { 'I','N',0 };
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static const WCHAR INDEX_W[] = { 'I','N','D','E','X',0 };
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static const WCHAR INITIALLY_W[] = { 'I','N','I','T','I','A','L','L','Y',0 };
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static const WCHAR INNER_W[] = { 'I','N','N','E','R',0 };
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static const WCHAR INSERT_W[] = { 'I','N','S','E','R','T',0 };
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static const WCHAR INSTEAD_W[] = { 'I','N','S','T','E','A','D',0 };
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static const WCHAR INT_W[] = { 'I','N','T',0 };
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static const WCHAR INTEGER_W[] = { 'I','N','T','E','G','E','R',0 };
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static const WCHAR INTERSECT_W[] = { 'I','N','T','E','R','S','E','C','T',0 };
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static const WCHAR INTO_W[] = { 'I','N','T','O',0 };
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static const WCHAR IS_W[] = { 'I','S',0 };
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static const WCHAR ISNULL_W[] = { 'I','S','N','U','L','L',0 };
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static const WCHAR JOIN_W[] = { 'J','O','I','N',0 };
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static const WCHAR KEY_W[] = { 'K','E','Y',0 };
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static const WCHAR LEFT_W[] = { 'L','E','F','T',0 };
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static const WCHAR LIKE_W[] = { 'L','I','K','E',0 };
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static const WCHAR LIMIT_W[] = { 'L','I','M','I','T',0 };
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static const WCHAR LOCALIZABLE_W[] = { 'L','O','C','A','L','I','Z','A','B','L','E',0 };
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static const WCHAR LONG_W[] = { 'L','O','N','G',0 };
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static const WCHAR LONGCHAR_W[] = { 'L','O','N','G','C','H','A','R',0 };
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static const WCHAR MATCH_W[] = { 'M','A','T','C','H',0 };
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static const WCHAR NATURAL_W[] = { 'N','A','T','U','R','A','L',0 };
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static const WCHAR NOT_W[] = { 'N','O','T',0 };
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static const WCHAR NOTNULL_W[] = { 'N','O','T','N','U','L','L',0 };
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static const WCHAR NULL_W[] = { 'N','U','L','L',0 };
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static const WCHAR OBJECT_W[] = { 'O','B','J','E','C','T',0 };
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static const WCHAR OF_W[] = { 'O','F',0 };
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static const WCHAR OFFSET_W[] = { 'O','F','F','S','E','T',0 };
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static const WCHAR ON_W[] = { 'O','N',0 };
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static const WCHAR OR_W[] = { 'O','R',0 };
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static const WCHAR ORDER_W[] = { 'O','R','D','E','R',0 };
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static const WCHAR OUTER_W[] = { 'O','U','T','E','R',0 };
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static const WCHAR PRAGMA_W[] = { 'P','R','A','G','M','A',0 };
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static const WCHAR PRIMARY_W[] = { 'P','R','I','M','A','R','Y',0 };
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static const WCHAR RAISE_W[] = { 'R','A','I','S','E',0 };
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static const WCHAR REFERENCES_W[] = { 'R','E','F','E','R','E','N','C','E','S',0 };
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static const WCHAR REPLACE_W[] = { 'R','E','P','L','A','C','E',0 };
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static const WCHAR RESTRICT_W[] = { 'R','E','S','T','R','I','C','T',0 };
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static const WCHAR RIGHT_W[] = { 'R','I','G','H','T',0 };
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static const WCHAR ROLLBACK_W[] = { 'R','O','L','L','B','A','C','K',0 };
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static const WCHAR ROW_W[] = { 'R','O','W',0 };
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static const WCHAR SELECT_W[] = { 'S','E','L','E','C','T',0 };
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static const WCHAR SET_W[] = { 'S','E','T',0 };
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static const WCHAR SHORT_W[] = { 'S','H','O','R','T',0 };
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static const WCHAR STATEMENT_W[] = { 'S','T','A','T','E','M','E','N','T',0 };
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static const WCHAR TABLE_W[] = { 'T','A','B','L','E',0 };
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static const WCHAR TEMP_W[] = { 'T','E','M','P',0 };
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static const WCHAR TEMPORARY_W[] = { 'T','E','M','P','O','R','A','R','Y',0 };
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static const WCHAR THEN_W[] = { 'T','H','E','N',0 };
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static const WCHAR TRANSACTION_W[] = { 'T','R','A','N','S','A','C','T','I','O','N',0 };
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static const WCHAR TRIGGER_W[] = { 'T','R','I','G','G','E','R',0 };
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static const WCHAR UNION_W[] = { 'U','N','I','O','N',0 };
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static const WCHAR UNIQUE_W[] = { 'U','N','I','Q','U','E',0 };
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static const WCHAR UPDATE_W[] = { 'U','P','D','A','T','E',0 };
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static const WCHAR USING_W[] = { 'U','S','I','N','G',0 };
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static const WCHAR VACUUM_W[] = { 'V','A','C','U','U','M',0 };
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static const WCHAR VALUES_W[] = { 'V','A','L','U','E','S',0 };
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static const WCHAR VIEW_W[] = { 'V','I','E','W',0 };
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static const WCHAR WHEN_W[] = { 'W','H','E','N',0 };
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static const WCHAR WHERE_W[] = { 'W','H','E','R','E',0 };
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/*
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** These are the keywords
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*/
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static const Keyword aKeywordTable[] = {
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{ ABORT_W, TK_ABORT },
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{ AFTER_W, TK_AFTER },
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{ ALTER_W, TK_ALTER },
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{ ALL_W, TK_ALL },
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{ AND_W, TK_AND },
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{ AS_W, TK_AS },
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{ ASC_W, TK_ASC },
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{ BEFORE_W, TK_BEFORE },
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{ BEGIN_W, TK_BEGIN },
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{ BETWEEN_W, TK_BETWEEN },
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{ BY_W, TK_BY },
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{ CASCADE_W, TK_CASCADE },
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{ CASE_W, TK_CASE },
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{ CHAR_W, TK_CHAR },
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{ CHARACTER_W, TK_CHAR },
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{ CHECK_W, TK_CHECK },
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{ CLUSTER_W, TK_CLUSTER },
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{ COLLATE_W, TK_COLLATE },
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{ COMMIT_W, TK_COMMIT },
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{ CONFLICT_W, TK_CONFLICT },
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{ CONSTRAINT_W, TK_CONSTRAINT },
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{ COPY_W, TK_COPY },
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{ CREATE_W, TK_CREATE },
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{ CROSS_W, TK_JOIN_KW },
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{ DEFAULT_W, TK_DEFAULT },
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{ DEFERRED_W, TK_DEFERRED },
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{ DEFERRABLE_W, TK_DEFERRABLE },
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{ DELETE_W, TK_DELETE },
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{ DELIMITERS_W, TK_DELIMITERS },
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{ DESC_W, TK_DESC },
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{ DISTINCT_W, TK_DISTINCT },
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{ DROP_W, TK_DROP },
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{ END_W, TK_END },
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{ EACH_W, TK_EACH },
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{ ELSE_W, TK_ELSE },
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{ EXCEPT_W, TK_EXCEPT },
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{ EXPLAIN_W, TK_EXPLAIN },
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{ FAIL_W, TK_FAIL },
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{ FOR_W, TK_FOR },
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{ FOREIGN_W, TK_FOREIGN },
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{ FROM_W, TK_FROM },
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{ FULL_W, TK_JOIN_KW },
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{ GLOB_W, TK_GLOB },
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{ GROUP_W, TK_GROUP },
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{ HAVING_W, TK_HAVING },
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{ HOLD_W, TK_HOLD },
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{ IGNORE_W, TK_IGNORE },
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{ IMMEDIATE_W, TK_IMMEDIATE },
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{ IN_W, TK_IN },
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{ INDEX_W, TK_INDEX },
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{ INITIALLY_W, TK_INITIALLY },
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{ INNER_W, TK_JOIN_KW },
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{ INSERT_W, TK_INSERT },
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{ INSTEAD_W, TK_INSTEAD },
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{ INT_W, TK_INT },
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{ INTEGER_W, TK_INT },
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{ INTERSECT_W, TK_INTERSECT },
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{ INTO_W, TK_INTO },
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{ IS_W, TK_IS },
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{ ISNULL_W, TK_ISNULL },
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{ JOIN_W, TK_JOIN },
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{ KEY_W, TK_KEY },
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{ LEFT_W, TK_JOIN_KW },
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{ LIKE_W, TK_LIKE },
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{ LIMIT_W, TK_LIMIT },
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{ LOCALIZABLE_W, TK_LOCALIZABLE },
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{ LONG_W, TK_LONG },
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{ LONGCHAR_W, TK_LONGCHAR },
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{ MATCH_W, TK_MATCH },
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{ NATURAL_W, TK_JOIN_KW },
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{ NOT_W, TK_NOT },
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{ NOTNULL_W, TK_NOTNULL },
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{ NULL_W, TK_NULL },
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{ OBJECT_W, TK_OBJECT },
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{ OF_W, TK_OF },
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{ OFFSET_W, TK_OFFSET },
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{ ON_W, TK_ON },
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{ OR_W, TK_OR },
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{ ORDER_W, TK_ORDER },
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{ OUTER_W, TK_JOIN_KW },
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{ PRAGMA_W, TK_PRAGMA },
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{ PRIMARY_W, TK_PRIMARY },
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{ RAISE_W, TK_RAISE },
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{ REFERENCES_W, TK_REFERENCES },
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{ REPLACE_W, TK_REPLACE },
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{ RESTRICT_W, TK_RESTRICT },
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{ RIGHT_W, TK_JOIN_KW },
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{ ROLLBACK_W, TK_ROLLBACK },
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{ ROW_W, TK_ROW },
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{ SELECT_W, TK_SELECT },
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{ SET_W, TK_SET },
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{ SHORT_W, TK_SHORT },
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{ STATEMENT_W, TK_STATEMENT },
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{ TABLE_W, TK_TABLE },
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{ TEMPORARY_W, TK_TEMPORARY },
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{ THEN_W, TK_THEN },
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{ TRANSACTION_W, TK_TRANSACTION },
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{ TRIGGER_W, TK_TRIGGER },
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{ UNION_W, TK_UNION },
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{ UNIQUE_W, TK_UNIQUE },
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{ UPDATE_W, TK_UPDATE },
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{ USING_W, TK_USING },
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{ VACUUM_W, TK_VACUUM },
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{ VALUES_W, TK_VALUES },
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{ VIEW_W, TK_VIEW },
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{ WHEN_W, TK_WHEN },
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{ WHERE_W, TK_WHERE },
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};
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#define KEYWORD_COUNT ( sizeof aKeywordTable/sizeof (Keyword) )
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/*
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** Comparison function for binary search.
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*/
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static int compKeyword(const void *m1, const void *m2){
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const Keyword *k1 = m1, *k2 = m2;
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return strcmpiW( k1->zName, k2->zName );
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}
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/*
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** This function looks up an identifier to determine if it is a
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** keyword. If it is a keyword, the token code of that keyword is
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** returned. If the input is not a keyword, TK_ID is returned.
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*/
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static int sqliteKeywordCode(const WCHAR *z, int n){
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WCHAR str[MAX_TOKEN_LEN+1];
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Keyword key, *r;
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if( n>MAX_TOKEN_LEN )
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return TK_ID;
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memcpy( str, z, n*sizeof (WCHAR) );
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str[n] = 0;
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key.tokenType = 0;
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key.zName = str;
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r = bsearch( &key, aKeywordTable, KEYWORD_COUNT, sizeof (Keyword), compKeyword );
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if( r )
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return r->tokenType;
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return TK_ID;
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}
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/*
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** If X is a character that can be used in an identifier then
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** isIdChar[X] will be 1. Otherwise isIdChar[X] will be 0.
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**
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** In this implementation, an identifier can be a string of
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** alphabetic characters, digits, and "_" plus any character
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** with the high-order bit set. The latter rule means that
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** any sequence of UTF-8 characters or characters taken from
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** an extended ISO8859 character set can form an identifier.
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*/
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static const char isIdChar[] = {
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/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 1x */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 2x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 3x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 4x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, /* 5x */
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 6x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, /* 7x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 8x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 9x */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Ax */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Bx */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Cx */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Dx */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Ex */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Fx */
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};
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/*
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** Return the length of the token that begins at z[0]. Return
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** -1 if the token is (or might be) incomplete. Store the token
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** type in *tokenType before returning.
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*/
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int sqliteGetToken(const WCHAR *z, int *tokenType){
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int i;
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switch( *z ){
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case ' ': case '\t': case '\n': case '\f': case '\r': {
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for(i=1; isspace(z[i]); i++){}
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*tokenType = TK_SPACE;
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return i;
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}
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case '-': {
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if( z[1]==0 ) return -1;
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if( z[1]=='-' ){
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for(i=2; z[i] && z[i]!='\n'; i++){}
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*tokenType = TK_COMMENT;
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return i;
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}
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*tokenType = TK_MINUS;
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return 1;
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}
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case '(': {
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if( z[1]=='+' && z[2]==')' ){
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*tokenType = TK_ORACLE_OUTER_JOIN;
|
|
return 3;
|
|
}else{
|
|
*tokenType = TK_LP;
|
|
return 1;
|
|
}
|
|
}
|
|
case ')': {
|
|
*tokenType = TK_RP;
|
|
return 1;
|
|
}
|
|
case ';': {
|
|
*tokenType = TK_SEMI;
|
|
return 1;
|
|
}
|
|
case '+': {
|
|
*tokenType = TK_PLUS;
|
|
return 1;
|
|
}
|
|
case '*': {
|
|
*tokenType = TK_STAR;
|
|
return 1;
|
|
}
|
|
case '/': {
|
|
if( z[1]!='*' || z[2]==0 ){
|
|
*tokenType = TK_SLASH;
|
|
return 1;
|
|
}
|
|
for(i=3; z[i] && (z[i]!='/' || z[i-1]!='*'); i++){}
|
|
if( z[i] ) i++;
|
|
*tokenType = TK_COMMENT;
|
|
return i;
|
|
}
|
|
case '%': {
|
|
*tokenType = TK_REM;
|
|
return 1;
|
|
}
|
|
case '=': {
|
|
*tokenType = TK_EQ;
|
|
return 1 + (z[1]=='=');
|
|
}
|
|
case '<': {
|
|
if( z[1]=='=' ){
|
|
*tokenType = TK_LE;
|
|
return 2;
|
|
}else if( z[1]=='>' ){
|
|
*tokenType = TK_NE;
|
|
return 2;
|
|
}else if( z[1]=='<' ){
|
|
*tokenType = TK_LSHIFT;
|
|
return 2;
|
|
}else{
|
|
*tokenType = TK_LT;
|
|
return 1;
|
|
}
|
|
}
|
|
case '>': {
|
|
if( z[1]=='=' ){
|
|
*tokenType = TK_GE;
|
|
return 2;
|
|
}else if( z[1]=='>' ){
|
|
*tokenType = TK_RSHIFT;
|
|
return 2;
|
|
}else{
|
|
*tokenType = TK_GT;
|
|
return 1;
|
|
}
|
|
}
|
|
case '!': {
|
|
if( z[1]!='=' ){
|
|
*tokenType = TK_ILLEGAL;
|
|
return 2;
|
|
}else{
|
|
*tokenType = TK_NE;
|
|
return 2;
|
|
}
|
|
}
|
|
case '|': {
|
|
if( z[1]!='|' ){
|
|
*tokenType = TK_BITOR;
|
|
return 1;
|
|
}else{
|
|
*tokenType = TK_CONCAT;
|
|
return 2;
|
|
}
|
|
}
|
|
case '?': {
|
|
*tokenType = TK_WILDCARD;
|
|
return 1;
|
|
}
|
|
case ',': {
|
|
*tokenType = TK_COMMA;
|
|
return 1;
|
|
}
|
|
case '&': {
|
|
*tokenType = TK_BITAND;
|
|
return 1;
|
|
}
|
|
case '~': {
|
|
*tokenType = TK_BITNOT;
|
|
return 1;
|
|
}
|
|
case '`': case '\'': case '"': {
|
|
int delim = z[0];
|
|
for(i=1; z[i]; i++){
|
|
if( z[i]==delim ){
|
|
if( z[i+1]==delim ){
|
|
i++;
|
|
}else{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if( z[i] ) i++;
|
|
if( delim == '`' )
|
|
*tokenType = TK_ID;
|
|
else
|
|
*tokenType = TK_STRING;
|
|
return i;
|
|
}
|
|
case '.': {
|
|
if( !isdigit(z[1]) ){
|
|
*tokenType = TK_DOT;
|
|
return 1;
|
|
}
|
|
/* Fall thru into the next case */
|
|
}
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9': {
|
|
*tokenType = TK_INTEGER;
|
|
for(i=1; isdigit(z[i]); i++){}
|
|
if( z[i]=='.' ){
|
|
i++;
|
|
while( isdigit(z[i]) ){ i++; }
|
|
*tokenType = TK_FLOAT;
|
|
}
|
|
if( (z[i]=='e' || z[i]=='E') &&
|
|
( isdigit(z[i+1])
|
|
|| ((z[i+1]=='+' || z[i+1]=='-') && isdigit(z[i+2]))
|
|
)
|
|
){
|
|
i += 2;
|
|
while( isdigit(z[i]) ){ i++; }
|
|
*tokenType = TK_FLOAT;
|
|
}else if( z[0]=='.' ){
|
|
*tokenType = TK_FLOAT;
|
|
}
|
|
return i;
|
|
}
|
|
case '[': {
|
|
for(i=1; z[i] && z[i-1]!=']'; i++){}
|
|
*tokenType = TK_ID;
|
|
return i;
|
|
}
|
|
default: {
|
|
if( !isIdChar[*z] ){
|
|
break;
|
|
}
|
|
for(i=1; isIdChar[z[i]]; i++){}
|
|
*tokenType = sqliteKeywordCode(z, i);
|
|
return i;
|
|
}
|
|
}
|
|
*tokenType = TK_ILLEGAL;
|
|
return 1;
|
|
}
|