mirror of
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87a8c78510
I need this for the following commits to be able to fix more compiler warnings
without having to introduce additional diff for better code from newer branches, that
also uses this macro. The older the branch, the less of duplication we have for this
macro.
picked from 0.4.11-dev-258-g 82faa151e5
307 lines
10 KiB
C
307 lines
10 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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** A 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 *name; /* The keyword name */
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unsigned int len;
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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 addW[] = {'A','D','D'};
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static const WCHAR alterW[] = {'A','L','T','E','R'};
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static const WCHAR andW[] = {'A','N','D'};
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static const WCHAR byW[] = {'B','Y'};
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static const WCHAR charW[] = {'C','H','A','R'};
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static const WCHAR characterW[] = {'C','H','A','R','A','C','T','E','R'};
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static const WCHAR createW[] = {'C','R','E','A','T','E'};
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static const WCHAR deleteW[] = {'D','E','L','E','T','E'};
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static const WCHAR distinctW[] = {'D','I','S','T','I','N','C','T'};
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static const WCHAR dropW[] = {'D','R','O','P'};
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static const WCHAR freeW[] = {'F','R','E','E'};
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static const WCHAR fromW[] = {'F','R','O','M'};
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static const WCHAR holdW[] = {'H','O','L','D'};
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static const WCHAR insertW[] = {'I','N','S','E','R','T'};
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static const WCHAR intW[] = {'I','N','T'};
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static const WCHAR integerW[] = {'I','N','T','E','G','E','R'};
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static const WCHAR intoW[] = {'I','N','T','O'};
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static const WCHAR isW[] = {'I','S'};
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static const WCHAR keyW[] = {'K','E','Y'};
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static const WCHAR likeW[] = {'L','I','K','E'};
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static const WCHAR localizableW[] = {'L','O','C','A','L','I','Z','A','B','L','E'};
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static const WCHAR longW[] = {'L','O','N','G'};
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static const WCHAR longcharW[] = {'L','O','N','G','C','H','A','R'};
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static const WCHAR notW[] = {'N','O','T'};
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static const WCHAR nullW[] = {'N','U','L','L'};
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static const WCHAR objectW[] = {'O','B','J','E','C','T'};
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static const WCHAR orW[] = {'O','R'};
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static const WCHAR orderW[] = {'O','R','D','E','R'};
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static const WCHAR primaryW[] = {'P','R','I','M','A','R','Y'};
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static const WCHAR selectW[] = {'S','E','L','E','C','T'};
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static const WCHAR setW[] = {'S','E','T'};
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static const WCHAR shortW[] = {'S','H','O','R','T'};
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static const WCHAR tableW[] = {'T','A','B','L','E'};
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static const WCHAR temporaryW[] = {'T','E','M','P','O','R','A','R','Y'};
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static const WCHAR updateW[] = {'U','P','D','A','T','E'};
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static const WCHAR valuesW[] = {'V','A','L','U','E','S'};
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static const WCHAR whereW[] = {'W','H','E','R','E'};
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/*
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** These are the keywords
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** They MUST be in alphabetical order
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*/
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static const Keyword aKeywordTable[] = {
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{ addW, ARRAY_SIZE(addW), TK_ADD },
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{ alterW, ARRAY_SIZE(alterW), TK_ALTER },
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{ andW, ARRAY_SIZE(andW), TK_AND },
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{ byW, ARRAY_SIZE(byW), TK_BY },
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{ charW, ARRAY_SIZE(charW), TK_CHAR },
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{ characterW, ARRAY_SIZE(characterW), TK_CHAR },
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{ createW, ARRAY_SIZE(createW), TK_CREATE },
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{ deleteW, ARRAY_SIZE(deleteW), TK_DELETE },
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{ distinctW, ARRAY_SIZE(distinctW), TK_DISTINCT },
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{ dropW, ARRAY_SIZE(dropW), TK_DROP },
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{ freeW, ARRAY_SIZE(freeW), TK_FREE },
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{ fromW, ARRAY_SIZE(fromW), TK_FROM },
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{ holdW, ARRAY_SIZE(holdW), TK_HOLD },
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{ insertW, ARRAY_SIZE(insertW), TK_INSERT },
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{ intW, ARRAY_SIZE(intW), TK_INT },
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{ integerW, ARRAY_SIZE(integerW), TK_INT },
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{ intoW, ARRAY_SIZE(intoW), TK_INTO },
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{ isW, ARRAY_SIZE(isW), TK_IS },
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{ keyW, ARRAY_SIZE(keyW), TK_KEY },
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{ likeW, ARRAY_SIZE(likeW), TK_LIKE },
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{ localizableW, ARRAY_SIZE(localizableW), TK_LOCALIZABLE },
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{ longW, ARRAY_SIZE(longW), TK_LONG },
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{ longcharW, ARRAY_SIZE(longcharW), TK_LONGCHAR },
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{ notW, ARRAY_SIZE(notW), TK_NOT },
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{ nullW, ARRAY_SIZE(nullW), TK_NULL },
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{ objectW, ARRAY_SIZE(objectW), TK_OBJECT },
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{ orW, ARRAY_SIZE(orW), TK_OR },
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{ orderW, ARRAY_SIZE(orderW), TK_ORDER },
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{ primaryW, ARRAY_SIZE(primaryW), TK_PRIMARY },
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{ selectW, ARRAY_SIZE(selectW), TK_SELECT },
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{ setW, ARRAY_SIZE(setW), TK_SET },
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{ shortW, ARRAY_SIZE(shortW), TK_SHORT },
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{ tableW, ARRAY_SIZE(tableW), TK_TABLE },
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{ temporaryW, ARRAY_SIZE(temporaryW), TK_TEMPORARY },
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{ updateW, ARRAY_SIZE(updateW), TK_UPDATE },
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{ valuesW, ARRAY_SIZE(valuesW), TK_VALUES },
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{ whereW, ARRAY_SIZE(whereW), TK_WHERE },
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};
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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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int ret, len = min( k1->len, k2->len );
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if ((ret = memicmpW( k1->name, k2->name, len ))) return ret;
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if (k1->len < k2->len) return -1;
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else if (k1->len > k2->len) return 1;
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return 0;
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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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Keyword key, *r;
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if( n>MAX_TOKEN_LEN )
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return TK_ID;
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key.tokenType = 0;
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key.name = z;
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key.len = n;
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r = bsearch( &key, aKeywordTable, ARRAY_SIZE(aKeywordTable), 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, 1, 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, 1, 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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** WCHAR safe version of isdigit()
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*/
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static inline int isDigit(WCHAR c)
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{
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return c >= '0' && c <= '9';
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}
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/*
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** WCHAR safe version of isspace(), except '\r'
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*/
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static inline int isSpace(WCHAR c)
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{
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return c == ' ' || c == '\t' || c == '\n' || c == '\f';
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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, int *skip){
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int i;
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*skip = 0;
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switch( *z ){
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case ' ': case '\t': case '\n': case '\f':
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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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case '-':
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if( z[1]==0 ) return -1;
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*tokenType = TK_MINUS;
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return 1;
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case '(':
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*tokenType = TK_LP;
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return 1;
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case ')':
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*tokenType = TK_RP;
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return 1;
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case '*':
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*tokenType = TK_STAR;
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return 1;
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case '=':
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*tokenType = TK_EQ;
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return 1;
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case '<':
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if( z[1]=='=' ){
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*tokenType = TK_LE;
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return 2;
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}else if( z[1]=='>' ){
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*tokenType = TK_NE;
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return 2;
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}else{
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*tokenType = TK_LT;
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return 1;
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}
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case '>':
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if( z[1]=='=' ){
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*tokenType = TK_GE;
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return 2;
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}else{
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*tokenType = TK_GT;
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return 1;
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}
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case '!':
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if( z[1]!='=' ){
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*tokenType = TK_ILLEGAL;
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return 2;
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}else{
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*tokenType = TK_NE;
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return 2;
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}
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case '?':
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*tokenType = TK_WILDCARD;
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return 1;
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case ',':
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*tokenType = TK_COMMA;
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return 1;
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case '`': case '\'': {
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int delim = z[0];
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for(i=1; z[i]; i++){
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if( z[i]==delim )
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break;
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}
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if( z[i] ) i++;
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if( delim == '`' )
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*tokenType = TK_ID;
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else
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*tokenType = TK_STRING;
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return i;
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}
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case '.':
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if( !isDigit(z[1]) ){
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*tokenType = TK_DOT;
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return 1;
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}
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/* Fall through */
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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*tokenType = TK_INTEGER;
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for(i=1; isDigit(z[i]); i++){}
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return i;
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case '[':
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for(i=1; z[i] && z[i-1]!=']'; i++){}
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*tokenType = TK_ID;
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return i;
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default:
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if( !isIdChar[*z] ){
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break;
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}
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for(i=1; isIdChar[z[i]]; i++){}
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*tokenType = sqliteKeywordCode(z, i);
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if( *tokenType == TK_ID && z[i] == '`' ) *skip = 1;
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return i;
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}
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*tokenType = TK_ILLEGAL;
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return 1;
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}
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