txtidx datatype for full text indexing with GiST.

From Oleg Bartunov and Teodor Sigaev.

1 files changed, 49 insertions, 0 deletions

diff --git a/contrib/tsearch/query.h b/contrib/tsearch/query.h
new file mode 100644
index 0000000000..96117e78c8
--- /dev/null
+++ b/contrib/tsearch/query.h
@@ -0,0 +1,49 @@
+#ifndef __QUERY_H__
+#define __QUERY_H__
+/*
+#define BS_DEBUG
+*/
+
+
+/*
+ * item in polish notation with back link
+ * to left operand
+ */
+typedef struct ITEM {
+	int2    type;
+	int2	left;
+	int4    val;
+	/* user-friendly value */
+	uint16	distance;
+	uint16	length;
+} ITEM;
+
+/*
+ *Storage:
+ *	(len)(size)(array of ITEM)(array of operand in user-friendly form)
+ */
+typedef struct {
+	int4	len;
+	int4	size;
+	char	data[1];
+} QUERYTYPE;
+
+#define HDRSIZEQT	( 2*sizeof(int4) )
+#define COMPUTESIZE(size,lenofoperand)	( HDRSIZEQT + size * sizeof(ITEM) + lenofoperand )
+#define GETQUERY(x)  (ITEM*)( (char*)(x)+HDRSIZEQT )
+#define GETOPERAND(x)   ( (char*)GETQUERY(x) + ((QUERYTYPE*)x)->size * sizeof(ITEM) )
+
+#define ISOPERATOR(x) ( (x)=='!' || (x)=='&' || (x)=='|' || (x)=='(' || (x)==')' )
+
+#define END             0
+#define ERR             1
+#define VAL             2
+#define OPR             3
+#define OPEN            4
+#define CLOSE           5  
+#define VALTRUE         6       /* for stop words */
+#define VALFALSE        7
+
+bool execute( ITEM* curitem, void *checkval, 
+	bool calcnot, bool (*chkcond)(void *checkval, ITEM* val ));
+#endif