txtidx datatype for full text indexing with GiST.

From Oleg Bartunov and Teodor Sigaev.

1 files changed, 46 insertions, 0 deletions

diff --git a/contrib/tsearch/txtidx.h b/contrib/tsearch/txtidx.h
new file mode 100644
index 0000000000..9a586ce518
--- /dev/null
+++ b/contrib/tsearch/txtidx.h
@@ -0,0 +1,46 @@
+#ifndef __TXTIDX_H__
+#define __TXTIDX_H__
+
+/*
+#define TXTIDX_DEBUG
+*/
+
+#include "postgres.h"
+
+#include "access/gist.h"
+#include "access/itup.h"
+#include "utils/elog.h"
+#include "utils/palloc.h"
+#include "utils/builtins.h"
+#include "storage/bufpage.h"
+
+typedef struct {
+	uint16	len;
+	uint16	pos;
+} WordEntry;
+
+typedef struct {
+	int4	len;
+	int4	size;
+	char	data[1];
+} txtidx;
+
+#define DATAHDRSIZE	(sizeof(int4)*2)
+#define CALCDATASIZE(x, lenstr)	( x * sizeof(WordEntry) + DATAHDRSIZE + lenstr )
+#define ARRPTR(x)   ( (WordEntry*) ( (char*)x + DATAHDRSIZE ) )
+#define STRPTR(x)   ( (char*)x + DATAHDRSIZE + ( sizeof(WordEntry) * ((txtidx*)x)->size ) )
+#define STRSIZE(x)  ( ((txtidx*)x)->len - DATAHDRSIZE - ( sizeof(WordEntry) * ((txtidx*)x)->size ) )
+
+typedef struct {
+	char *prsbuf;
+	char *word;
+	char *curpos;
+	int4 len;
+	int4 state;
+	bool oprisdelim;
+} TI_IN_STATE;
+
+int4 gettoken_txtidx( TI_IN_STATE *state );
+
+#endif
+