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-rw-r--r--contrib/tsearch/rewrite.c278
1 files changed, 168 insertions, 110 deletions
diff --git a/contrib/tsearch/rewrite.c b/contrib/tsearch/rewrite.c
index 590b15e7ca..9ad7a0a86a 100644
--- a/contrib/tsearch/rewrite.c
+++ b/contrib/tsearch/rewrite.c
@@ -19,52 +19,63 @@
#include "query.h"
#include "rewrite.h"
-typedef struct NODE {
- struct NODE *left;
+typedef struct NODE
+{
+ struct NODE *left;
struct NODE *right;
- ITEM* valnode;
-} NODE;
+ ITEM *valnode;
+} NODE;
/*
* make query tree from plain view of query
*/
-static NODE*
-maketree(ITEM *in) {
- NODE *node = (NODE*)palloc(sizeof(NODE));
+static NODE *
+maketree(ITEM * in)
+{
+ NODE *node = (NODE *) palloc(sizeof(NODE));
+
node->valnode = in;
node->right = node->left = NULL;
- if ( in->type == OPR ) {
- node->right = maketree( in + 1 );
- if ( in->val != (int4)'!' )
- node->left = maketree( in + in->left );
+ if (in->type == OPR)
+ {
+ node->right = maketree(in + 1);
+ if (in->val != (int4) '!')
+ node->left = maketree(in + in->left);
}
return node;
}
-typedef struct {
- ITEM* ptr;
- int4 len;
- int4 cur;
-} PLAINTREE;
+typedef struct
+{
+ ITEM *ptr;
+ int4 len;
+ int4 cur;
+} PLAINTREE;
static void
-plainnode(PLAINTREE *state, NODE* node) {
- if ( state->cur == state->len ) {
+plainnode(PLAINTREE * state, NODE * node)
+{
+ if (state->cur == state->len)
+ {
state->len *= 2;
- state->ptr=(ITEM*)repalloc( (void*)state->ptr, state->len*sizeof(ITEM) );
+ state->ptr = (ITEM *) repalloc((void *) state->ptr, state->len * sizeof(ITEM));
}
- memcpy( (void*)&(state->ptr[state->cur]), (void*)node->valnode, sizeof(ITEM) );
- if ( node->valnode->type == VAL ) {
+ memcpy((void *) &(state->ptr[state->cur]), (void *) node->valnode, sizeof(ITEM));
+ if (node->valnode->type == VAL)
state->cur++;
- } else if ( node->valnode->val == (int4)'!' ) {
- state->ptr[state->cur].left=1;
+ else if (node->valnode->val == (int4) '!')
+ {
+ state->ptr[state->cur].left = 1;
state->cur++;
plainnode(state, node->right);
- } else {
- int4 cur = state->cur;
+ }
+ else
+ {
+ int4 cur = state->cur;
+
state->cur++;
plainnode(state, node->right);
- state->ptr[cur].left = state->cur - cur;
+ state->ptr[cur].left = state->cur - cur;
plainnode(state, node->left);
}
pfree(node);
@@ -73,75 +84,96 @@ plainnode(PLAINTREE *state, NODE* node) {
/*
* make plain view of tree from 'normal' view of tree
*/
-static ITEM*
-plaintree(NODE *root, int4 *len) {
+static ITEM *
+plaintree(NODE * root, int4 *len)
+{
PLAINTREE pl;
- pl.cur=0;
- pl.len=16;
- if ( root && (root->valnode->type == VAL || root->valnode->type == OPR) ) {
- pl.ptr = (ITEM*)palloc( pl.len*sizeof(ITEM) );
+
+ pl.cur = 0;
+ pl.len = 16;
+ if (root && (root->valnode->type == VAL || root->valnode->type == OPR))
+ {
+ pl.ptr = (ITEM *) palloc(pl.len * sizeof(ITEM));
plainnode(&pl, root);
- } else {
- pl.ptr = NULL;
}
+ else
+ pl.ptr = NULL;
*len = pl.cur;
- return pl.ptr;
+ return pl.ptr;
}
static void
-freetree(NODE *node) {
- if ( !node ) return;
- if ( node->left ) freetree(node->left);
- if ( node->right ) freetree(node->right);
- pfree( node );
+freetree(NODE * node)
+{
+ if (!node)
+ return;
+ if (node->left)
+ freetree(node->left);
+ if (node->right)
+ freetree(node->right);
+ pfree(node);
}
/*
* clean tree for ! operator.
- * It's usefull for debug, but in
+ * It's usefull for debug, but in
* other case, such view is used with search in index.
* Operator ! always return TRUE
*/
-static NODE*
-clean_NOT_intree( NODE* node ) {
- if ( node->valnode->type == VAL )
+static NODE *
+clean_NOT_intree(NODE * node)
+{
+ if (node->valnode->type == VAL)
return node;
- if ( node->valnode->val == (int4)'!' ) {
+ if (node->valnode->val == (int4) '!')
+ {
freetree(node);
return NULL;
}
/* operator & or | */
- if ( node->valnode->val == (int4)'|' ) {
- if ( (node->left=clean_NOT_intree(node->left)) == NULL ||
- (node->right=clean_NOT_intree(node->right)) == NULL ) {
+ if (node->valnode->val == (int4) '|')
+ {
+ if ((node->left = clean_NOT_intree(node->left)) == NULL ||
+ (node->right = clean_NOT_intree(node->right)) == NULL)
+ {
freetree(node);
return NULL;
}
- } else {
- NODE *res = node;
- node->left=clean_NOT_intree(node->left);
- node->right=clean_NOT_intree(node->right);
- if ( node->left == NULL && node->right == NULL ) {
+ }
+ else
+ {
+ NODE *res = node;
+
+ node->left = clean_NOT_intree(node->left);
+ node->right = clean_NOT_intree(node->right);
+ if (node->left == NULL && node->right == NULL)
+ {
pfree(node);
res = NULL;
- } else if ( node->left == NULL ) {
+ }
+ else if (node->left == NULL)
+ {
res = node->right;
pfree(node);
- } else if ( node->right == NULL ) {
+ }
+ else if (node->right == NULL)
+ {
res = node->left;
pfree(node);
- }
+ }
return res;
}
- return node;
+ return node;
}
-ITEM*
-clean_NOT(ITEM* ptr, int4 *len) {
- NODE *root = maketree( ptr );
- return plaintree(clean_NOT_intree(root), len);
+ITEM *
+clean_NOT(ITEM * ptr, int4 *len)
+{
+ NODE *root = maketree(ptr);
+
+ return plaintree(clean_NOT_intree(root), len);
}
#define V_UNKNOWN 0
@@ -149,86 +181,112 @@ clean_NOT(ITEM* ptr, int4 *len) {
#define V_FALSE 2
/*
- * Clean query tree from values which is always in
+ * Clean query tree from values which is always in
* text (stopword)
- */
-static NODE*
-clean_fakeval_intree( NODE* node, char *result ) {
- char lresult = V_UNKNOWN, rresult = V_UNKNOWN;
- if ( node->valnode->type == VAL )
+ */
+static NODE *
+clean_fakeval_intree(NODE * node, char *result)
+{
+ char lresult = V_UNKNOWN,
+ rresult = V_UNKNOWN;
+
+ if (node->valnode->type == VAL)
return node;
- else if ( node->valnode->type == VALTRUE ) {
- pfree( node );
+ else if (node->valnode->type == VALTRUE)
+ {
+ pfree(node);
*result = V_TRUE;
return NULL;
- }
-
+ }
+
- if ( node->valnode->val == (int4)'!' ) {
- node->right = clean_fakeval_intree( node->right, &rresult );
- if ( ! node->right ) {
- *result = ( rresult == V_TRUE ) ? V_FALSE : V_TRUE;
+ if (node->valnode->val == (int4) '!')
+ {
+ node->right = clean_fakeval_intree(node->right, &rresult);
+ if (!node->right)
+ {
+ *result = (rresult == V_TRUE) ? V_FALSE : V_TRUE;
freetree(node);
return NULL;
}
- } else if ( node->valnode->val == (int4)'|' ) {
- NODE *res = node;
- node->left =clean_fakeval_intree(node->left, &lresult);
- node->right=clean_fakeval_intree(node->right,&rresult);
- if ( lresult == V_TRUE || rresult == V_TRUE ) {
+ }
+ else if (node->valnode->val == (int4) '|')
+ {
+ NODE *res = node;
+
+ node->left = clean_fakeval_intree(node->left, &lresult);
+ node->right = clean_fakeval_intree(node->right, &rresult);
+ if (lresult == V_TRUE || rresult == V_TRUE)
+ {
freetree(node);
- *result=V_TRUE;
+ *result = V_TRUE;
return NULL;
- } else if ( lresult == V_FALSE && rresult == V_FALSE ) {
+ }
+ else if (lresult == V_FALSE && rresult == V_FALSE)
+ {
freetree(node);
- *result=V_FALSE;
+ *result = V_FALSE;
return NULL;
- } else if ( lresult == V_FALSE ) {
+ }
+ else if (lresult == V_FALSE)
+ {
res = node->right;
pfree(node);
- } else if ( rresult == V_FALSE ) {
+ }
+ else if (rresult == V_FALSE)
+ {
res = node->left;
pfree(node);
}
- return res;
- } else {
- NODE *res = node;
- node->left =clean_fakeval_intree(node->left, &lresult);
- node->right=clean_fakeval_intree(node->right,&rresult);
- if ( lresult == V_FALSE || rresult == V_FALSE ) {
+ return res;
+ }
+ else
+ {
+ NODE *res = node;
+
+ node->left = clean_fakeval_intree(node->left, &lresult);
+ node->right = clean_fakeval_intree(node->right, &rresult);
+ if (lresult == V_FALSE || rresult == V_FALSE)
+ {
freetree(node);
- *result=V_FALSE;
+ *result = V_FALSE;
return NULL;
- } else if ( lresult == V_TRUE && rresult == V_TRUE ) {
+ }
+ else if (lresult == V_TRUE && rresult == V_TRUE)
+ {
freetree(node);
- *result=V_TRUE;
+ *result = V_TRUE;
return NULL;
- } else if ( lresult == V_TRUE ) {
+ }
+ else if (lresult == V_TRUE)
+ {
res = node->right;
pfree(node);
- } else if ( rresult == V_TRUE ) {
+ }
+ else if (rresult == V_TRUE)
+ {
res = node->left;
pfree(node);
}
- return res;
+ return res;
}
- return node;
+ return node;
}
-ITEM*
-clean_fakeval(ITEM* ptr, int4 *len) {
- NODE *root = maketree( ptr );
- char result = V_UNKNOWN;
- NODE *resroot;
-
+ITEM *
+clean_fakeval(ITEM * ptr, int4 *len)
+{
+ NODE *root = maketree(ptr);
+ char result = V_UNKNOWN;
+ NODE *resroot;
+
resroot = clean_fakeval_intree(root, &result);
- if ( result != V_UNKNOWN ) {
- elog(ERROR,"Your query contained only stopword(s), ignored");
+ if (result != V_UNKNOWN)
+ {
+ elog(ERROR, "Your query contained only stopword(s), ignored");
*len = 0;
return NULL;
}
-
- return plaintree(resroot, len);
-}
-
+ return plaintree(resroot, len);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-23 01:31:05 +0000