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ce6af3b1bc
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org> Signed-off-by: Hans Leidekker <hans@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org> wine commit id 6705b959d0cf7635bf2ab16ab89fefb409a0a9c8 by Michael Stefaniuc <mstefani@winehq.org>
270 lines
7.3 KiB
C
270 lines
7.3 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 "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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/*
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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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#define X(str) str, ARRAY_SIZE(str) - 1
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static const Keyword aKeywordTable[] = {
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{ X(L"ADD"), TK_ADD },
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{ X(L"ALTER"), TK_ALTER },
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{ X(L"AND"), TK_AND },
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{ X(L"BY"), TK_BY },
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{ X(L"CHAR"), TK_CHAR },
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{ X(L"CHARACTER"), TK_CHAR },
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{ X(L"CREATE"), TK_CREATE },
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{ X(L"DELETE"), TK_DELETE },
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{ X(L"DISTINCT"), TK_DISTINCT },
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{ X(L"DROP"), TK_DROP },
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{ X(L"FREE"), TK_FREE },
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{ X(L"FROM"), TK_FROM },
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{ X(L"HOLD"), TK_HOLD },
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{ X(L"INSERT"), TK_INSERT },
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{ X(L"INT"), TK_INT },
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{ X(L"INTEGER"), TK_INT },
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{ X(L"INTO"), TK_INTO },
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{ X(L"IS"), TK_IS },
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{ X(L"KEY"), TK_KEY },
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{ X(L"LIKE"), TK_LIKE },
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{ X(L"LOCALIZABLE"), TK_LOCALIZABLE },
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{ X(L"LONG"), TK_LONG },
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{ X(L"LONGCHAR"), TK_LONGCHAR },
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{ X(L"NOT"), TK_NOT },
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{ X(L"NULL"), TK_NULL },
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{ X(L"OBJECT"), TK_OBJECT },
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{ X(L"OR"), TK_OR },
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{ X(L"ORDER"), TK_ORDER },
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{ X(L"PRIMARY"), TK_PRIMARY },
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{ X(L"SELECT"), TK_SELECT },
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{ X(L"SET"), TK_SET },
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{ X(L"SHORT"), TK_SHORT },
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{ X(L"TABLE"), TK_TABLE },
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{ X(L"TEMPORARY"), TK_TEMPORARY },
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{ X(L"UPDATE"), TK_UPDATE },
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{ X(L"VALUES"), TK_VALUES },
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{ X(L"WHERE"), TK_WHERE },
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};
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#undef X
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/*
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** Comparison function for binary search.
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*/
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static int __cdecl 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 = wcsnicmp( 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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