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Diffstat (limited to 'lib/libsqlite3/ext/fts3/fts3_expr.c')
-rw-r--r--lib/libsqlite3/ext/fts3/fts3_expr.c205
1 files changed, 104 insertions, 101 deletions
diff --git a/lib/libsqlite3/ext/fts3/fts3_expr.c b/lib/libsqlite3/ext/fts3/fts3_expr.c
index 9c71f26ba1d..f5d28cbfcc7 100644
--- a/lib/libsqlite3/ext/fts3/fts3_expr.c
+++ b/lib/libsqlite3/ext/fts3/fts3_expr.c
@@ -185,40 +185,23 @@ static int getNextToken(
int rc;
sqlite3_tokenizer_cursor *pCursor;
Fts3Expr *pRet = 0;
- int nConsumed = 0;
+ int i = 0;
- rc = sqlite3Fts3OpenTokenizer(pTokenizer, pParse->iLangid, z, n, &pCursor);
+ /* Set variable i to the maximum number of bytes of input to tokenize. */
+ for(i=0; i<n; i++){
+ if( sqlite3_fts3_enable_parentheses && (z[i]=='(' || z[i]==')') ) break;
+ if( z[i]=='*' || z[i]=='"' ) break;
+ }
+
+ *pnConsumed = i;
+ rc = sqlite3Fts3OpenTokenizer(pTokenizer, pParse->iLangid, z, i, &pCursor);
if( rc==SQLITE_OK ){
const char *zToken;
int nToken = 0, iStart = 0, iEnd = 0, iPosition = 0;
int nByte; /* total space to allocate */
rc = pModule->xNext(pCursor, &zToken, &nToken, &iStart, &iEnd, &iPosition);
-
- if( (rc==SQLITE_OK || rc==SQLITE_DONE) && sqlite3_fts3_enable_parentheses ){
- int i;
- if( rc==SQLITE_DONE ) iStart = n;
- for(i=0; i<iStart; i++){
- if( z[i]=='(' ){
- pParse->nNest++;
- rc = fts3ExprParse(pParse, &z[i+1], n-i-1, &pRet, &nConsumed);
- if( rc==SQLITE_OK && !pRet ){
- rc = SQLITE_DONE;
- }
- nConsumed = (int)(i + 1 + nConsumed);
- break;
- }
-
- if( z[i]==')' ){
- rc = SQLITE_DONE;
- pParse->nNest--;
- nConsumed = i+1;
- break;
- }
- }
- }
-
- if( nConsumed==0 && rc==SQLITE_OK ){
+ if( rc==SQLITE_OK ){
nByte = sizeof(Fts3Expr) + sizeof(Fts3Phrase) + nToken;
pRet = (Fts3Expr *)fts3MallocZero(nByte);
if( !pRet ){
@@ -252,13 +235,14 @@ static int getNextToken(
}
}
- nConsumed = iEnd;
+ *pnConsumed = iEnd;
+ }else if( i && rc==SQLITE_DONE ){
+ rc = SQLITE_OK;
}
pModule->xClose(pCursor);
}
- *pnConsumed = nConsumed;
*ppExpr = pRet;
return rc;
}
@@ -508,6 +492,21 @@ static int getNextNode(
return getNextString(pParse, &zInput[1], ii-1, ppExpr);
}
+ if( sqlite3_fts3_enable_parentheses ){
+ if( *zInput=='(' ){
+ int nConsumed = 0;
+ pParse->nNest++;
+ rc = fts3ExprParse(pParse, zInput+1, nInput-1, ppExpr, &nConsumed);
+ if( rc==SQLITE_OK && !*ppExpr ){ rc = SQLITE_DONE; }
+ *pnConsumed = (int)(zInput - z) + 1 + nConsumed;
+ return rc;
+ }else if( *zInput==')' ){
+ pParse->nNest--;
+ *pnConsumed = (int)((zInput - z) + 1);
+ *ppExpr = 0;
+ return SQLITE_DONE;
+ }
+ }
/* If control flows to this point, this must be a regular token, or
** the end of the input. Read a regular token using the sqlite3_tokenizer
@@ -626,96 +625,100 @@ static int fts3ExprParse(
while( rc==SQLITE_OK ){
Fts3Expr *p = 0;
int nByte = 0;
+
rc = getNextNode(pParse, zIn, nIn, &p, &nByte);
+ assert( nByte>0 || (rc!=SQLITE_OK && p==0) );
if( rc==SQLITE_OK ){
- int isPhrase;
-
- if( !sqlite3_fts3_enable_parentheses
- && p->eType==FTSQUERY_PHRASE && pParse->isNot
- ){
- /* Create an implicit NOT operator. */
- Fts3Expr *pNot = fts3MallocZero(sizeof(Fts3Expr));
- if( !pNot ){
- sqlite3Fts3ExprFree(p);
- rc = SQLITE_NOMEM;
- goto exprparse_out;
- }
- pNot->eType = FTSQUERY_NOT;
- pNot->pRight = p;
- p->pParent = pNot;
- if( pNotBranch ){
- pNot->pLeft = pNotBranch;
- pNotBranch->pParent = pNot;
- }
- pNotBranch = pNot;
- p = pPrev;
- }else{
- int eType = p->eType;
- isPhrase = (eType==FTSQUERY_PHRASE || p->pLeft);
-
- /* The isRequirePhrase variable is set to true if a phrase or
- ** an expression contained in parenthesis is required. If a
- ** binary operator (AND, OR, NOT or NEAR) is encounted when
- ** isRequirePhrase is set, this is a syntax error.
- */
- if( !isPhrase && isRequirePhrase ){
- sqlite3Fts3ExprFree(p);
- rc = SQLITE_ERROR;
- goto exprparse_out;
- }
-
- if( isPhrase && !isRequirePhrase ){
- /* Insert an implicit AND operator. */
- Fts3Expr *pAnd;
- assert( pRet && pPrev );
- pAnd = fts3MallocZero(sizeof(Fts3Expr));
- if( !pAnd ){
+ if( p ){
+ int isPhrase;
+
+ if( !sqlite3_fts3_enable_parentheses
+ && p->eType==FTSQUERY_PHRASE && pParse->isNot
+ ){
+ /* Create an implicit NOT operator. */
+ Fts3Expr *pNot = fts3MallocZero(sizeof(Fts3Expr));
+ if( !pNot ){
sqlite3Fts3ExprFree(p);
rc = SQLITE_NOMEM;
goto exprparse_out;
}
- pAnd->eType = FTSQUERY_AND;
- insertBinaryOperator(&pRet, pPrev, pAnd);
- pPrev = pAnd;
- }
+ pNot->eType = FTSQUERY_NOT;
+ pNot->pRight = p;
+ p->pParent = pNot;
+ if( pNotBranch ){
+ pNot->pLeft = pNotBranch;
+ pNotBranch->pParent = pNot;
+ }
+ pNotBranch = pNot;
+ p = pPrev;
+ }else{
+ int eType = p->eType;
+ isPhrase = (eType==FTSQUERY_PHRASE || p->pLeft);
+
+ /* The isRequirePhrase variable is set to true if a phrase or
+ ** an expression contained in parenthesis is required. If a
+ ** binary operator (AND, OR, NOT or NEAR) is encounted when
+ ** isRequirePhrase is set, this is a syntax error.
+ */
+ if( !isPhrase && isRequirePhrase ){
+ sqlite3Fts3ExprFree(p);
+ rc = SQLITE_ERROR;
+ goto exprparse_out;
+ }
- /* This test catches attempts to make either operand of a NEAR
- ** operator something other than a phrase. For example, either of
- ** the following:
- **
- ** (bracketed expression) NEAR phrase
- ** phrase NEAR (bracketed expression)
- **
- ** Return an error in either case.
- */
- if( pPrev && (
+ if( isPhrase && !isRequirePhrase ){
+ /* Insert an implicit AND operator. */
+ Fts3Expr *pAnd;
+ assert( pRet && pPrev );
+ pAnd = fts3MallocZero(sizeof(Fts3Expr));
+ if( !pAnd ){
+ sqlite3Fts3ExprFree(p);
+ rc = SQLITE_NOMEM;
+ goto exprparse_out;
+ }
+ pAnd->eType = FTSQUERY_AND;
+ insertBinaryOperator(&pRet, pPrev, pAnd);
+ pPrev = pAnd;
+ }
+
+ /* This test catches attempts to make either operand of a NEAR
+ ** operator something other than a phrase. For example, either of
+ ** the following:
+ **
+ ** (bracketed expression) NEAR phrase
+ ** phrase NEAR (bracketed expression)
+ **
+ ** Return an error in either case.
+ */
+ if( pPrev && (
(eType==FTSQUERY_NEAR && !isPhrase && pPrev->eType!=FTSQUERY_PHRASE)
|| (eType!=FTSQUERY_PHRASE && isPhrase && pPrev->eType==FTSQUERY_NEAR)
- )){
- sqlite3Fts3ExprFree(p);
- rc = SQLITE_ERROR;
- goto exprparse_out;
- }
-
- if( isPhrase ){
- if( pRet ){
- assert( pPrev && pPrev->pLeft && pPrev->pRight==0 );
- pPrev->pRight = p;
- p->pParent = pPrev;
+ )){
+ sqlite3Fts3ExprFree(p);
+ rc = SQLITE_ERROR;
+ goto exprparse_out;
+ }
+
+ if( isPhrase ){
+ if( pRet ){
+ assert( pPrev && pPrev->pLeft && pPrev->pRight==0 );
+ pPrev->pRight = p;
+ p->pParent = pPrev;
+ }else{
+ pRet = p;
+ }
}else{
- pRet = p;
+ insertBinaryOperator(&pRet, pPrev, p);
}
- }else{
- insertBinaryOperator(&pRet, pPrev, p);
+ isRequirePhrase = !isPhrase;
}
- isRequirePhrase = !isPhrase;
+ pPrev = p;
}
assert( nByte>0 );
}
assert( rc!=SQLITE_OK || (nByte>0 && nByte<=nIn) );
nIn -= nByte;
zIn += nByte;
- pPrev = p;
}
if( rc==SQLITE_DONE && pRet && isRequirePhrase ){
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