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wine/dlls/msi/tokenize.c

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/*
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
*/
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wine/debug.h"
#include "winnls.h"
#include "query.h"
#include "sql.tab.h"
WINE_DEFAULT_DEBUG_CHANNEL(msi);
/*
** All the keywords of the SQL language are stored as in a hash
** table composed of instances of the following structure.
*/
typedef struct Keyword Keyword;
struct Keyword {
const char *zName; /* The keyword name */
int tokenType; /* The token value for this keyword */
};
/*
** These are the keywords
*/
static const Keyword aKeywordTable[] = {
{ "ABORT", TK_ABORT },
{ "AFTER", TK_AFTER },
{ "ALL", TK_ALL },
{ "AND", TK_AND },
{ "AS", TK_AS },
{ "ASC", TK_ASC },
{ "BEFORE", TK_BEFORE },
{ "BEGIN", TK_BEGIN },
{ "BETWEEN", TK_BETWEEN },
{ "BY", TK_BY },
{ "CASCADE", TK_CASCADE },
{ "CASE", TK_CASE },
{ "CHAR", TK_CHAR },
{ "CHARACTER", TK_CHAR },
{ "CHECK", TK_CHECK },
{ "CLUSTER", TK_CLUSTER },
{ "COLLATE", TK_COLLATE },
{ "COMMIT", TK_COMMIT },
{ "CONFLICT", TK_CONFLICT },
{ "CONSTRAINT", TK_CONSTRAINT },
{ "COPY", TK_COPY },
{ "CREATE", TK_CREATE },
{ "CROSS", TK_JOIN_KW },
{ "DEFAULT", TK_DEFAULT },
{ "DEFERRED", TK_DEFERRED },
{ "DEFERRABLE", TK_DEFERRABLE },
{ "DELETE", TK_DELETE },
{ "DELIMITERS", TK_DELIMITERS },
{ "DESC", TK_DESC },
{ "DISTINCT", TK_DISTINCT },
{ "DROP", TK_DROP },
{ "END", TK_END },
{ "EACH", TK_EACH },
{ "ELSE", TK_ELSE },
{ "EXCEPT", TK_EXCEPT },
{ "EXPLAIN", TK_EXPLAIN },
{ "FAIL", TK_FAIL },
{ "FOR", TK_FOR },
{ "FOREIGN", TK_FOREIGN },
{ "FROM", TK_FROM },
{ "FULL", TK_JOIN_KW },
{ "GLOB", TK_GLOB },
{ "GROUP", TK_GROUP },
{ "HAVING", TK_HAVING },
{ "HOLD", TK_HOLD },
{ "IGNORE", TK_IGNORE },
{ "IMMEDIATE", TK_IMMEDIATE },
{ "IN", TK_IN },
{ "INDEX", TK_INDEX },
{ "INITIALLY", TK_INITIALLY },
{ "INNER", TK_JOIN_KW },
{ "INSERT", TK_INSERT },
{ "INSTEAD", TK_INSTEAD },
{ "INT", TK_INT },
{ "INTERSECT", TK_INTERSECT },
{ "INTO", TK_INTO },
{ "IS", TK_IS },
{ "ISNULL", TK_ISNULL },
{ "JOIN", TK_JOIN },
{ "KEY", TK_KEY },
{ "LEFT", TK_JOIN_KW },
{ "LIKE", TK_LIKE },
{ "LIMIT", TK_LIMIT },
{ "LOCALIZABLE", TK_LOCALIZABLE },
{ "LONG", TK_LONG },
{ "LONGCHAR", TK_LONGCHAR },
{ "MATCH", TK_MATCH },
{ "NATURAL", TK_JOIN_KW },
{ "NOT", TK_NOT },
{ "NOTNULL", TK_NOTNULL },
{ "NULL", TK_NULL },
{ "OBJECT", TK_OBJECT },
{ "OF", TK_OF },
{ "OFFSET", TK_OFFSET },
{ "ON", TK_ON },
{ "OR", TK_OR },
{ "ORDER", TK_ORDER },
{ "OUTER", TK_JOIN_KW },
{ "PRAGMA", TK_PRAGMA },
{ "PRIMARY", TK_PRIMARY },
{ "RAISE", TK_RAISE },
{ "REFERENCES", TK_REFERENCES },
{ "REPLACE", TK_REPLACE },
{ "RESTRICT", TK_RESTRICT },
{ "RIGHT", TK_JOIN_KW },
{ "ROLLBACK", TK_ROLLBACK },
{ "ROW", TK_ROW },
{ "SELECT", TK_SELECT },
{ "SET", TK_SET },
{ "SHORT", TK_SHORT },
{ "STATEMENT", TK_STATEMENT },
{ "TABLE", TK_TABLE },
{ "TEMP", TK_TEMP },
{ "TEMPORARY", TK_TEMP },
{ "THEN", TK_THEN },
{ "TRANSACTION", TK_TRANSACTION },
{ "TRIGGER", TK_TRIGGER },
{ "UNION", TK_UNION },
{ "UNIQUE", TK_UNIQUE },
{ "UPDATE", TK_UPDATE },
{ "USING", TK_USING },
{ "VACUUM", TK_VACUUM },
{ "VALUES", TK_VALUES },
{ "VIEW", TK_VIEW },
{ "WHEN", TK_WHEN },
{ "WHERE", TK_WHERE },
};
#define KEYWORD_COUNT ( sizeof aKeywordTable/sizeof (Keyword) )
/*
** This function looks up an identifier to determine if it is a
** keyword. If it is a keyword, the token code of that keyword is
** returned. If the input is not a keyword, TK_ID is returned.
*/
static int sqliteKeywordCode(const WCHAR *z, int n){
UINT i, len;
char buffer[0x10];
len = WideCharToMultiByte( CP_ACP, 0, z, n, buffer, sizeof buffer, NULL, NULL );
for(i=0; i<len; i++)
buffer[i] = toupper(buffer[i]);
for(i=0; i<KEYWORD_COUNT; i++)
{
if(memcmp(buffer, aKeywordTable[i].zName, len))
continue;
if(strlen(aKeywordTable[i].zName) == len )
return aKeywordTable[i].tokenType;
}
return TK_ID;
}
/*
** If X is a character that can be used in an identifier then
** isIdChar[X] will be 1. Otherwise isIdChar[X] will be 0.
**
** In this implementation, an identifier can be a string of
** alphabetic characters, digits, and "_" plus any character
** with the high-order bit set. The latter rule means that
** any sequence of UTF-8 characters or characters taken from
** an extended ISO8859 character set can form an identifier.
*/
static const char isIdChar[] = {
/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 1x */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 2x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 3x */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 4x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, /* 5x */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 6x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, /* 7x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 8x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 9x */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Ax */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Bx */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Cx */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Dx */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Ex */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* Fx */
};
/*
** Return the length of the token that begins at z[0]. Return
** -1 if the token is (or might be) incomplete. Store the token
** type in *tokenType before returning.
*/
int sqliteGetToken(const WCHAR *z, int *tokenType){
int i;
switch( *z ){
case ' ': case '\t': case '\n': case '\f': case '\r': {
for(i=1; isspace(z[i]); i++){}
*tokenType = TK_SPACE;
return i;
}
case '-': {
if( z[1]==0 ) return -1;
if( z[1]=='-' ){
for(i=2; z[i] && z[i]!='\n'; i++){}
*tokenType = TK_COMMENT;
return i;
}
*tokenType = TK_MINUS;
return 1;
}
case '(': {
if( z[1]=='+' && z[2]==')' ){
*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;
}
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