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Insert #ifdefs that can optionally remove features at compiletime resulting

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in a database engine with a smaller footprint. (CVS 2034)

FossilOrigin-Name: be661acfa849bb0d5692797dd221f5a8a457f8ad
This commit is contained in:
drh
2004-10-31 02:22:47 +00:00
parent 27d258a3ec
commit b7f9164e98
28 changed files with 439 additions and 173 deletions
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103
src/tokenize.c
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@@ -15,7 +15,7 @@
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: tokenize.c,v 1.92 2004/10/23 05:10:18 drh Exp $
** $Id: tokenize.c,v 1.93 2004/10/31 02:22:49 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -287,6 +287,7 @@ static int sqliteGetToken(const unsigned char *z, int *tokenType){
case '5': case '6': case '7': case '8': case '9': {
*tokenType = TK_INTEGER;
for(i=1; isdigit(z[i]); i++){}
#ifndef SQLITE_OMIT_FLOATING_POINT
if( z[i]=='.' && isdigit(z[i+1]) ){
i += 2;
while( isdigit(z[i]) ){ i++; }
@@ -301,6 +302,7 @@ static int sqliteGetToken(const unsigned char *z, int *tokenType){
while( isdigit(z[i]) ){ i++; }
*tokenType = TK_FLOAT;
}
#endif
return i;
}
case '[': {
@@ -318,6 +320,7 @@ static int sqliteGetToken(const unsigned char *z, int *tokenType){
*tokenType = i>1 ? TK_VARIABLE : TK_ILLEGAL;
return i;
}
#ifndef SQLITE_OMIT_TCL_VARIABLE
case '$': {
*tokenType = TK_VARIABLE;
if( z[1]=='{' ){
@@ -354,7 +357,9 @@ static int sqliteGetToken(const unsigned char *z, int *tokenType){
if( n==0 ) *tokenType = TK_ILLEGAL;
}
return i;
}
}
#endif
#ifndef SQLITE_OMIT_BLOB_LITERAL
case 'x': case 'X': {
if( (c=z[1])=='\'' || c=='"' ){
int delim = c;
@@ -374,6 +379,7 @@ static int sqliteGetToken(const unsigned char *z, int *tokenType){
}
/* Otherwise fall through to the next case */
}
#endif
default: {
if( !IdChar(*z) ){
break;
@@ -502,14 +508,14 @@ abort_parse:
** Token types used by the sqlite3_complete() routine. See the header
** comments on that procedure for additional information.
*/
#define tkEXPLAIN 0
#define tkCREATE 1
#define tkTEMP 2
#define tkTRIGGER 3
#define tkEND 4
#define tkSEMI 5
#define tkWS 6
#define tkOTHER 7
#define tkSEMI 0
#define tkWS 1
#define tkOTHER 2
#define tkEXPLAIN 3
#define tkCREATE 4
#define tkTEMP 5
#define tkTRIGGER 6
#define tkEND 7
/*
** Return TRUE if the given SQL string ends in a semicolon.
@@ -524,16 +530,16 @@ abort_parse:
** returns 1 if it ends in the START state and 0 if it ends
** in any other state.
**
** (1) EXPLAIN The keyword EXPLAIN has been seen at the beginning of
** (1) NORMAL We are in the middle of statement which ends with a single
** semicolon.
**
** (2) EXPLAIN The keyword EXPLAIN has been seen at the beginning of
** a statement.
**
** (2) CREATE The keyword CREATE has been seen at the beginning of a
** (3) CREATE The keyword CREATE has been seen at the beginning of a
** statement, possibly preceeded by EXPLAIN and/or followed by
** TEMP or TEMPORARY
**
** (3) NORMAL We are in the middle of statement which ends with a single
** semicolon.
**
** (4) TRIGGER We are in the middle of a trigger definition that must be
** ended by a semicolon, the keyword END, and another semicolon.
**
@@ -546,36 +552,51 @@ abort_parse:
** Transitions between states above are determined by tokens extracted
** from the input. The following tokens are significant:
**
** (0) tkEXPLAIN The "explain" keyword.
** (1) tkCREATE The "create" keyword.
** (2) tkTEMP The "temp" or "temporary" keyword.
** (3) tkTRIGGER The "trigger" keyword.
** (4) tkEND The "end" keyword.
** (5) tkSEMI A semicolon.
** (6) tkWS Whitespace
** (7) tkOTHER Any other SQL token.
** (0) tkSEMI A semicolon.
** (1) tkWS Whitespace
** (2) tkOTHER Any other SQL token.
** (3) tkEXPLAIN The "explain" keyword.
** (4) tkCREATE The "create" keyword.
** (5) tkTEMP The "temp" or "temporary" keyword.
** (6) tkTRIGGER The "trigger" keyword.
** (7) tkEND The "end" keyword.
**
** Whitespace never causes a state transition and is always ignored.
**
** If we compile with SQLITE_OMIT_TRIGGER, all of the computation needed
** to recognize the end of a trigger can be omitted. All we have to do
** is look for a semicolon that is not part of an string or comment.
*/
int sqlite3_complete(const char *zSql){
u8 state = 0; /* Current state, using numbers defined in header comment */
u8 token; /* Value of the next token */
/* The following matrix defines the transition from one state to another
** according to what token is seen. trans[state][token] returns the
** next state.
#ifndef SQLITE_OMIT_TRIGGER
/* A complex statement machine used to detect the end of a CREATE TRIGGER
** statement. This is the normal case.
*/
static const u8 trans[7][8] = {
/* Token: */
/* State: ** EXPLAIN CREATE TEMP TRIGGER END SEMI WS OTHER */
/* 0 START: */ { 1, 2, 3, 3, 3, 0, 0, 3, },
/* 1 EXPLAIN: */ { 3, 2, 3, 3, 3, 0, 1, 3, },
/* 2 CREATE: */ { 3, 3, 2, 4, 3, 0, 2, 3, },
/* 3 NORMAL: */ { 3, 3, 3, 3, 3, 0, 3, 3, },
/* 4 TRIGGER: */ { 4, 4, 4, 4, 4, 5, 4, 4, },
/* 5 SEMI: */ { 4, 4, 4, 4, 6, 5, 5, 4, },
/* 6 END: */ { 4, 4, 4, 4, 4, 0, 6, 4, },
/* State: ** SEMI WS OTHER EXPLAIN CREATE TEMP TRIGGER END */
/* 0 START: */ { 0, 0, 1, 2, 3, 1, 1, 1, },
/* 1 NORMAL: */ { 0, 1, 1, 1, 1, 1, 1, 1, },
/* 2 EXPLAIN: */ { 0, 2, 1, 1, 3, 1, 1, 1, },
/* 3 CREATE: */ { 0, 3, 1, 1, 1, 3, 4, 1, },
/* 4 TRIGGER: */ { 5, 4, 4, 4, 4, 4, 4, 4, },
/* 5 SEMI: */ { 5, 5, 4, 4, 4, 4, 4, 6, },
/* 6 END: */ { 0, 6, 4, 4, 4, 4, 4, 4, },
};
#else
/* If triggers are not suppored by this compile then the statement machine
** used to detect the end of a statement is much simplier
*/
static const u8 trans[2][3] = {
/* Token: */
/* State: ** SEMI WS OTHER */
/* 0 START: */ { 0, 0, 1, },
/* 1 NORMAL: */ { 0, 1, 1, },
};
#endif /* SQLITE_OMIT_TRIGGER */
while( *zSql ){
switch( *zSql ){
@@ -635,6 +656,9 @@ int sqlite3_complete(const char *zSql){
/* Keywords and unquoted identifiers */
int nId;
for(nId=1; IdChar(zSql[nId]); nId++){}
#ifdef SQLITE_OMIT_TRIGGER
token = tkOTHER;
#else
switch( *zSql ){
case 'c': case 'C': {
if( nId==6 && sqlite3StrNICmp(zSql, "create", 6)==0 ){
@@ -659,9 +683,13 @@ int sqlite3_complete(const char *zSql){
case 'e': case 'E': {
if( nId==3 && sqlite3StrNICmp(zSql, "end", 3)==0 ){
token = tkEND;
}else if( nId==7 && sqlite3StrNICmp(zSql, "explain", 7)==0 ){
}else
#ifndef SQLITE_OMIT_EXPLAIN
if( nId==7 && sqlite3StrNICmp(zSql, "explain", 7)==0 ){
token = tkEXPLAIN;
}else{
}else
#endif
{
token = tkOTHER;
}
break;
@@ -671,6 +699,7 @@ int sqlite3_complete(const char *zSql){
break;
}
}
#endif /* SQLITE_OMIT_TRIGGER */
zSql += nId-1;
}else{
/* Operators and special symbols */
@@ -685,6 +714,7 @@ int sqlite3_complete(const char *zSql){
return state==0;
}
#ifndef SQLITE_OMIT_UTF16
/*
** This routine is the same as the sqlite3_complete() routine described
** above, except that the parameter is required to be UTF-16 encoded, not
@@ -704,3 +734,4 @@ int sqlite3_complete16(const void *zSql){
sqlite3ValueFree(pVal);
return rc;
}
#endif /* SQLITE_OMIT_UTF16 */