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/*-------------------------------------------------------------------------
*
* ts_type.h
* Definitions for the tsvector and tsquery types
*
* Copyright (c) 1998-2008, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/tsearch/ts_type.h,v 1.10 2008/01/01 19:45:59 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef _PG_TSTYPE_H_
#define _PG_TSTYPE_H_
#include "fmgr.h"
#include "utils/pg_crc.h"
/*
* TSVector type.
* Note, tsvectorsend/recv believe that sizeof(WordEntry) == 4
*/
typedef struct
{
uint32
haspos:1,
len:11, /* MAX 2Kb */
pos:20; /* MAX 1Mb */
} WordEntry;
#define MAXSTRLEN ( (1<<11) - 1)
#define MAXSTRPOS ( (1<<20) - 1)
/*
* Equivalent to
* typedef struct {
* uint16
* weight:2,
* pos:14;
* }
*/
typedef uint16 WordEntryPos;
typedef struct
{
uint16 npos;
WordEntryPos pos[1]; /* var length */
} WordEntryPosVector;
#define WEP_GETWEIGHT(x) ( (x) >> 14 )
#define WEP_GETPOS(x) ( (x) & 0x3fff )
#define WEP_SETWEIGHT(x,v) ( (x) = ( (v) << 14 ) | ( (x) & 0x3fff ) )
#define WEP_SETPOS(x,v) ( (x) = ( (x) & 0xc000 ) | ( (v) & 0x3fff ) )
#define MAXENTRYPOS (1<<14)
#define MAXNUMPOS (256)
#define LIMITPOS(x) ( ( (x) >= MAXENTRYPOS ) ? (MAXENTRYPOS-1) : (x) )
/*
* Structure of tsvector datatype:
* 1) standard varlena header
* 2) int4 size - number of lexemes or WordEntry array, which is the same
* 3) Array of WordEntry - sorted array, comparison based on word's length
* and strncmp(). WordEntry->pos points number of
* bytes from end of WordEntry array to start of
* corresponding lexeme.
* 4) Lexeme's storage:
* lexeme (without null-terminator)
* if haspos is true:
* padding byte if necessary to make the number of positions 2-byte aligned
* uint16 number of positions that follow.
* uint16[] positions
*
* The positions must be sorted.
*/
typedef struct
{
int32 vl_len_; /* varlena header (do not touch directly!) */
int32 size;
WordEntry entries[1]; /* var size */
/* lexemes follow */
} TSVectorData;
typedef TSVectorData *TSVector;
#define DATAHDRSIZE (offsetof(TSVectorData, entries))
#define CALCDATASIZE(x, lenstr) (DATAHDRSIZE + (x) * sizeof(WordEntry) + (lenstr) )
#define ARRPTR(x) ( (x)->entries )
/* returns a pointer to the beginning of lexemes */
#define STRPTR(x) ( (char *) &(x)->entries[x->size] )
#define _POSVECPTR(x, e) ((WordEntryPosVector *)(STRPTR(x) + SHORTALIGN((e)->pos + (e)->len)))
#define POSDATALEN(x,e) ( ( (e)->haspos ) ? (_POSVECPTR(x,e)->npos) : 0 )
#define POSDATAPTR(x,e) (_POSVECPTR(x,e)->pos)
/*
* fmgr interface macros
*/
#define DatumGetTSVector(X) ((TSVector) PG_DETOAST_DATUM(X))
#define DatumGetTSVectorCopy(X) ((TSVector) PG_DETOAST_DATUM_COPY(X))
#define TSVectorGetDatum(X) PointerGetDatum(X)
#define PG_GETARG_TSVECTOR(n) DatumGetTSVector(PG_GETARG_DATUM(n))
#define PG_GETARG_TSVECTOR_COPY(n) DatumGetTSVectorCopy(PG_GETARG_DATUM(n))
#define PG_RETURN_TSVECTOR(x) return TSVectorGetDatum(x)
/*
* I/O
*/
extern Datum tsvectorin(PG_FUNCTION_ARGS);
extern Datum tsvectorout(PG_FUNCTION_ARGS);
extern Datum tsvectorsend(PG_FUNCTION_ARGS);
extern Datum tsvectorrecv(PG_FUNCTION_ARGS);
/*
* operations with tsvector
*/
extern Datum tsvector_lt(PG_FUNCTION_ARGS);
extern Datum tsvector_le(PG_FUNCTION_ARGS);
extern Datum tsvector_eq(PG_FUNCTION_ARGS);
extern Datum tsvector_ne(PG_FUNCTION_ARGS);
extern Datum tsvector_ge(PG_FUNCTION_ARGS);
extern Datum tsvector_gt(PG_FUNCTION_ARGS);
extern Datum tsvector_cmp(PG_FUNCTION_ARGS);
extern Datum tsvector_length(PG_FUNCTION_ARGS);
extern Datum tsvector_strip(PG_FUNCTION_ARGS);
extern Datum tsvector_setweight(PG_FUNCTION_ARGS);
extern Datum tsvector_concat(PG_FUNCTION_ARGS);
extern Datum tsvector_update_trigger_byid(PG_FUNCTION_ARGS);
extern Datum tsvector_update_trigger_bycolumn(PG_FUNCTION_ARGS);
extern Datum ts_match_vq(PG_FUNCTION_ARGS);
extern Datum ts_match_qv(PG_FUNCTION_ARGS);
extern Datum ts_match_tt(PG_FUNCTION_ARGS);
extern Datum ts_match_tq(PG_FUNCTION_ARGS);
extern Datum ts_stat1(PG_FUNCTION_ARGS);
extern Datum ts_stat2(PG_FUNCTION_ARGS);
extern Datum ts_rank_tt(PG_FUNCTION_ARGS);
extern Datum ts_rank_wtt(PG_FUNCTION_ARGS);
extern Datum ts_rank_ttf(PG_FUNCTION_ARGS);
extern Datum ts_rank_wttf(PG_FUNCTION_ARGS);
extern Datum ts_rankcd_tt(PG_FUNCTION_ARGS);
extern Datum ts_rankcd_wtt(PG_FUNCTION_ARGS);
extern Datum ts_rankcd_ttf(PG_FUNCTION_ARGS);
extern Datum ts_rankcd_wttf(PG_FUNCTION_ARGS);
/*
* TSQuery
*
*
*/
typedef int8 QueryItemType;
/* Valid values for QueryItemType: */
#define QI_VAL 1
#define QI_OPR 2
#define QI_VALSTOP 3 /* This is only used in an intermediate stack
* representation in parse_tsquery. It's not a
* legal type elsewhere. */
/*
* QueryItem is one node in tsquery - operator or operand.
*/
typedef struct
{
QueryItemType type; /* operand or kind of operator (ts_tokentype) */
uint8 weight; /* weights of operand to search. It's a
* bitmask of allowed weights. if it =0 then
* any weight are allowed. Weights and bit
* map: A: 1<<3 B: 1<<2 C: 1<<1 D: 1<<0 */
int32 valcrc; /* XXX: pg_crc32 would be a more appropriate
* data type, but we use comparisons to signed
* integers in the code. They would need to be
* changed as well. */
/* pointer to text value of operand, must correlate with WordEntry */
uint32
length:12,
distance:20;
} QueryOperand;
/* Legal values for QueryOperator.operator */
#define OP_NOT 1
#define OP_AND 2
#define OP_OR 3
typedef struct
{
QueryItemType type;
int8 oper; /* see above */
uint32 left; /* pointer to left operand. Right operand is
* item + 1, left operand is placed
* item+item->left */
} QueryOperator;
/*
* Note: TSQuery is 4-bytes aligned, so make sure there's no fields
* inside QueryItem requiring 8-byte alignment, like int64.
*/
typedef union
{
QueryItemType type;
QueryOperator operator;
QueryOperand operand;
} QueryItem;
/*
* Storage:
* (len)(size)(array of QueryItem)(operands as '\0'-terminated c-strings)
*/
typedef struct
{
int32 vl_len_; /* varlena header (do not touch directly!) */
int4 size; /* number of QueryItems */
char data[1];
} TSQueryData;
typedef TSQueryData *TSQuery;
#define HDRSIZETQ ( VARHDRSZ + sizeof(int4) )
/* Computes the size of header and all QueryItems. size is the number of
* QueryItems, and lenofoperand is the total length of all operands
*/
#define COMPUTESIZE(size, lenofoperand) ( HDRSIZETQ + (size) * sizeof(QueryItem) + (lenofoperand) )
/* Returns a pointer to the first QueryItem in a TSVector */
#define GETQUERY(x) ((QueryItem*)( (char*)(x)+HDRSIZETQ ))
/* Returns a pointer to the beginning of operands in a TSVector */
#define GETOPERAND(x) ( (char*)GETQUERY(x) + ((TSQuery)(x))->size * sizeof(QueryItem) )
/*
* fmgr interface macros
* Note, TSQuery type marked as plain storage, so it can't be toasted
* but PG_DETOAST_DATUM_COPY is used for simplicity
*/
#define DatumGetTSQuery(X) ((TSQuery) DatumGetPointer(X))
#define DatumGetTSQueryCopy(X) ((TSQuery) PG_DETOAST_DATUM_COPY(X))
#define TSQueryGetDatum(X) PointerGetDatum(X)
#define PG_GETARG_TSQUERY(n) DatumGetTSQuery(PG_GETARG_DATUM(n))
#define PG_GETARG_TSQUERY_COPY(n) DatumGetTSQueryCopy(PG_GETARG_DATUM(n))
#define PG_RETURN_TSQUERY(x) return TSQueryGetDatum(x)
/*
* I/O
*/
extern Datum tsqueryin(PG_FUNCTION_ARGS);
extern Datum tsqueryout(PG_FUNCTION_ARGS);
extern Datum tsquerysend(PG_FUNCTION_ARGS);
extern Datum tsqueryrecv(PG_FUNCTION_ARGS);
/*
* operations with tsquery
*/
extern Datum tsquery_lt(PG_FUNCTION_ARGS);
extern Datum tsquery_le(PG_FUNCTION_ARGS);
extern Datum tsquery_eq(PG_FUNCTION_ARGS);
extern Datum tsquery_ne(PG_FUNCTION_ARGS);
extern Datum tsquery_ge(PG_FUNCTION_ARGS);
extern Datum tsquery_gt(PG_FUNCTION_ARGS);
extern Datum tsquery_cmp(PG_FUNCTION_ARGS);
extern Datum tsquerytree(PG_FUNCTION_ARGS);
extern Datum tsquery_numnode(PG_FUNCTION_ARGS);
extern Datum tsquery_and(PG_FUNCTION_ARGS);
extern Datum tsquery_or(PG_FUNCTION_ARGS);
extern Datum tsquery_not(PG_FUNCTION_ARGS);
extern Datum tsquery_rewrite(PG_FUNCTION_ARGS);
extern Datum tsquery_rewrite_query(PG_FUNCTION_ARGS);
extern Datum tsq_mcontains(PG_FUNCTION_ARGS);
extern Datum tsq_mcontained(PG_FUNCTION_ARGS);
#endif /* _PG_TSTYPE_H_ */