--- a/engine/sqlite/src/tokenize.cpp Wed Apr 28 13:20:05 2010 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,462 +0,0 @@
-/*
-** 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.
-**
-** $Id: tokenize.cpp 1282 2008-11-13 09:31:33Z LarsPson $
-*/
-#include "sqliteInt.h"
-#include <ctype.h>
-#include <stdlib.h>
-
-/*
-** The charMap() macro maps alphabetic characters into their
-** lower-case ASCII equivalent. On ASCII machines, this is just
-** an upper-to-lower case map. On EBCDIC machines we also need
-** to adjust the encoding. Only alphabetic characters and underscores
-** need to be translated.
-*/
-#ifdef SQLITE_ASCII
-# define charMap(X) sqlite3UpperToLower[(unsigned char)X]
-#endif
-#ifdef SQLITE_EBCDIC
-# define charMap(X) ebcdicToAscii[(unsigned char)X]
-const unsigned char ebcdicToAscii[] = {
-/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
- 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 */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 3x */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 4x */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 5x */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 95, 0, 0, /* 6x */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 7x */
- 0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* 8x */
- 0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* 9x */
- 0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ax */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Bx */
- 0, 97, 98, 99,100,101,102,103,104,105, 0, 0, 0, 0, 0, 0, /* Cx */
- 0,106,107,108,109,110,111,112,113,114, 0, 0, 0, 0, 0, 0, /* Dx */
- 0, 0,115,116,117,118,119,120,121,122, 0, 0, 0, 0, 0, 0, /* Ex */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* Fx */
-};
-#endif
-
-/*
-** The sqlite3KeywordCode 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.
-**
-** The implementation of this routine was generated by a program,
-** mkkeywordhash.h, located in the tool subdirectory of the distribution.
-** The output of the mkkeywordhash.c program is written into a file
-** named keywordhash.h and then included into this source file by
-** the #include below.
-*/
-#include "keywordhash.h"
-
-
-
-
-/*
-** Return the length of the token that begins at z[0].
-** Store the token type in *tokenType before returning.
-*/
-static int getToken(const unsigned char *z, int *tokenType){
- int i, c;
- 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]=='-' ){
- for(i=2; (c=z[i])!=0 && c!='\n'; i++){}
- *tokenType = TK_COMMENT;
- return i;
- }
- *tokenType = TK_MINUS;
- return 1;
- }
- case '(': {
- *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, c=z[2]; (c!='*' || z[i]!='/') && (c=z[i])!=0; i++){}
- if( c ) i++;
- *tokenType = TK_COMMENT;
- return i;
- }
- case '%': {
- *tokenType = TK_REM;
- return 1;
- }
- case '=': {
- *tokenType = TK_EQ;
- return 1 + (z[1]=='=');
- }
- case '<': {
- if( (c=z[1])=='=' ){
- *tokenType = TK_LE;
- return 2;
- }else if( c=='>' ){
- *tokenType = TK_NE;
- return 2;
- }else if( c=='<' ){
- *tokenType = TK_LSHIFT;
- return 2;
- }else{
- *tokenType = TK_LT;
- return 1;
- }
- }
- case '>': {
- if( (c=z[1])=='=' ){
- *tokenType = TK_GE;
- return 2;
- }else if( c=='>' ){
- *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_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; (c=z[i])!=0; i++){
- if( c==delim ){
- if( z[i+1]==delim ){
- i++;
- }else{
- break;
- }
- }
- }
- if( c ){
- *tokenType = TK_STRING;
- return i+1;
- }else{
- *tokenType = TK_ILLEGAL;
- return i;
- }
- }
- case '.': {
-#ifndef SQLITE_OMIT_FLOATING_POINT
- if( !isdigit(z[1]) )
-#endif
- {
- *tokenType = TK_DOT;
- return 1;
- }
- /* If the next character is a digit, this is a floating point
- ** number that begins with ".". 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=0; isdigit(z[i]); i++){}
-#ifndef SQLITE_OMIT_FLOATING_POINT
- 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;
- }
-#endif
- while( IdChar(z[i]) ){
- *tokenType = TK_ILLEGAL;
- i++;
- }
- return i;
- }
- case '[': {
- for(i=1, c=z[0]; c!=']' && (c=z[i])!=0; i++){}
- *tokenType = TK_ID;
- return i;
- }
- case '?': {
- *tokenType = TK_VARIABLE;
- for(i=1; isdigit(z[i]); i++){}
- return i;
- }
- case '#': {
- for(i=1; isdigit(z[i]); i++){}
- if( i>1 ){
- /* Parameters of the form #NNN (where NNN is a number) are used
- ** internally by sqlite3NestedParse. */
- *tokenType = TK_REGISTER;
- return i;
- }
- /* Fall through into the next case if the '#' is not followed by
- ** a digit. Try to match #AAAA where AAAA is a parameter name. */
- }
-#ifndef SQLITE_OMIT_TCL_VARIABLE
- case '$':
-#endif
- case '@': /* For compatibility with MS SQL Server */
- case ':': {
- int n = 0;
- *tokenType = TK_VARIABLE;
- for(i=1; (c=z[i])!=0; i++){
- if( IdChar(c) ){
- n++;
-#ifndef SQLITE_OMIT_TCL_VARIABLE
- }else if( c=='(' && n>0 ){
- do{
- i++;
- }while( (c=z[i])!=0 && !isspace(c) && c!=')' );
- if( c==')' ){
- i++;
- }else{
- *tokenType = TK_ILLEGAL;
- }
- break;
- }else if( c==':' && z[i+1]==':' ){
- i++;
-#endif
- }else{
- break;
- }
- }
- if( n==0 ) *tokenType = TK_ILLEGAL;
- return i;
- }
-#ifndef SQLITE_OMIT_BLOB_LITERAL
- case 'x': case 'X': {
- if( (c=z[1])=='\'' || c=='"' ){
- int delim = c;
- *tokenType = TK_BLOB;
- for(i=2; (c=z[i])!=0; i++){
- if( c==delim ){
- if( i%2 ) *tokenType = TK_ILLEGAL;
- break;
- }
- if( !isxdigit(c) ){
- *tokenType = TK_ILLEGAL;
- return i;
- }
- }
- if( c ) i++;
- return i;
- }
- /* Otherwise fall through to the next case */
- }
-#endif
- default: {
- if( !IdChar(*z) ){
- break;
- }
- for(i=1; IdChar(z[i]); i++){}
- *tokenType = keywordCode((char*)z, i);
- return i;
- }
- }
- *tokenType = TK_ILLEGAL;
- return 1;
-}
-int sqlite3GetToken(const unsigned char *z, int *tokenType){
- return getToken(z, tokenType);
-}
-
-/*
-** Run the parser on the given SQL string. The parser structure is
-** passed in. An SQLITE_ status code is returned. If an error occurs
-** and pzErrMsg!=NULL then an error message might be written into
-** memory obtained from sqlite3_malloc() and *pzErrMsg made to point to that
-** error message. Or maybe not.
-*/
-int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){
- int nErr = 0;
- int i;
- void *pEngine;
- int tokenType;
- int lastTokenParsed = -1;
- sqlite3 *db = pParse->db;
-
- if( db->activeVdbeCnt==0 ){
- db->u1.isInterrupted = 0;
- }
- pParse->rc = SQLITE_OK;
- i = 0;
- pEngine = sqlite3ParserAlloc((void*(*)(size_t))sqlite3_malloc);
- if( pEngine==0 ){
- db->mallocFailed = 1;
- return SQLITE_NOMEM;
- }
- assert( pParse->sLastToken.dyn==0 );
- assert( pParse->pNewTable==0 );
- assert( pParse->pNewTrigger==0 );
- assert( pParse->nVar==0 );
- assert( pParse->nVarExpr==0 );
- assert( pParse->nVarExprAlloc==0 );
- assert( pParse->apVarExpr==0 );
- pParse->zTail = pParse->zSql = zSql;
- while( !db->mallocFailed && zSql[i]!=0 ){
- assert( i>=0 );
- pParse->sLastToken.z = (u8*)&zSql[i];
- assert( pParse->sLastToken.dyn==0 );
- pParse->sLastToken.n = getToken((unsigned char*)&zSql[i],&tokenType);
- i += pParse->sLastToken.n;
- if( i>SQLITE_MAX_SQL_LENGTH ){
- pParse->rc = SQLITE_TOOBIG;
- break;
- }
- switch( tokenType ){
- case TK_SPACE:
- case TK_COMMENT: {
- if( db->u1.isInterrupted ){
- pParse->rc = SQLITE_INTERRUPT;
- sqlite3SetString(pzErrMsg, "interrupt", (char*)0);
- goto abort_parse;
- }
- break;
- }
- case TK_ILLEGAL: {
- if( pzErrMsg ){
- sqlite3_free(*pzErrMsg);
- *pzErrMsg = sqlite3MPrintf(db, "unrecognized token: \"%T\"",
- &pParse->sLastToken);
- }
- nErr++;
- goto abort_parse;
- }
- case TK_SEMI: {
- pParse->zTail = &zSql[i];
- /* Fall thru into the default case */
- }
- default: {
- sqlite3Parser(pEngine, tokenType, pParse->sLastToken, pParse);
- lastTokenParsed = tokenType;
- if( pParse->rc!=SQLITE_OK ){
- goto abort_parse;
- }
- break;
- }
- }
- }
-abort_parse:
- if( zSql[i]==0 && nErr==0 && pParse->rc==SQLITE_OK ){
- if( lastTokenParsed!=TK_SEMI ){
- sqlite3Parser(pEngine, TK_SEMI, pParse->sLastToken, pParse);
- pParse->zTail = &zSql[i];
- }
- sqlite3Parser(pEngine, 0, pParse->sLastToken, pParse);
- }
- sqlite3ParserFree(pEngine, sqlite3_free);
- if( db->mallocFailed ){
- pParse->rc = SQLITE_NOMEM;
- }
- if( pParse->rc!=SQLITE_OK && pParse->rc!=SQLITE_DONE && pParse->zErrMsg==0 ){
- sqlite3SetString(&pParse->zErrMsg, sqlite3ErrStr(pParse->rc), (char*)0);
- }
- if( pParse->zErrMsg ){
- if( pzErrMsg && *pzErrMsg==0 ){
- *pzErrMsg = pParse->zErrMsg;
- }else{
- sqlite3_free(pParse->zErrMsg);
- }
- pParse->zErrMsg = 0;
- if( !nErr ) nErr++;
- }
- if( pParse->pVdbe && pParse->nErr>0 && pParse->nested==0 ){
- sqlite3VdbeDelete(pParse->pVdbe);
- pParse->pVdbe = 0;
- }
-#ifndef SQLITE_OMIT_SHARED_CACHE
- if( pParse->nested==0 ){
- sqlite3_free(pParse->aTableLock);
- pParse->aTableLock = 0;
- pParse->nTableLock = 0;
- }
-#endif
-
- if( !IN_DECLARE_VTAB ){
- /* If the pParse->declareVtab flag is set, do not delete any table
- ** structure built up in pParse->pNewTable. The calling code (see vtab.c)
- ** will take responsibility for freeing the Table structure.
- */
- sqlite3DeleteTable(pParse->pNewTable);
- }
-
- sqlite3DeleteTrigger(pParse->pNewTrigger);
- sqlite3_free(pParse->apVarExpr);
- if( nErr>0 && (pParse->rc==SQLITE_OK || pParse->rc==SQLITE_DONE) ){
- pParse->rc = SQLITE_ERROR;
- }
- return nErr;
-}