ltxtquery_op.c File Reference

#include "postgres.h"
#include <ctype.h>
#include "ltree.h"
#include "miscadmin.h"

Include dependency graph for ltxtquery_op.c:

Go to the source code of this file.

Data Structures
struct	CHKVAL

Functions
	PG_FUNCTION_INFO_V1 (ltxtq_exec)
	PG_FUNCTION_INFO_V1 (ltxtq_rexec)
bool	ltree_execute (ITEM *curitem, void *checkval, bool calcnot, bool(*chkcond)(void *checkval, ITEM *val))
static bool	checkcondition_str (void *checkval, ITEM *val)
Datum	ltxtq_exec (PG_FUNCTION_ARGS)
Datum	ltxtq_rexec (PG_FUNCTION_ARGS)

Function Documentation

checkcondition_str()

static bool checkcondition_str ( void *  checkval, ITEM *  val  )

static

Definition at line 56 of file ltxtquery_op.c.

{
    ltree_level *level = LTREE_FIRST(((CHKVAL *) checkval)->node);
    int         tlen = ((CHKVAL *) checkval)->node->numlevel;
    char       *op = ((CHKVAL *) checkval)->operand + val->distance;
    int         (*cmpptr) (const char *, const char *, size_t);
 
    cmpptr = (val->flag & LVAR_INCASE) ? ltree_strncasecmp : strncmp;
    while (tlen > 0)
    {
        if (val->flag & LVAR_SUBLEXEME)
        {
            if (compare_subnode(level, op, val->length, cmpptr, (val->flag & LVAR_ANYEND)))
                return true;
        }
        else if ((val->length == level->len ||
                  (level->len > val->length && (val->flag & LVAR_ANYEND))) &&
                 (*cmpptr) (op, level->name, val->length) == 0)
            return true;
 
        tlen--;
        level = LEVEL_NEXT(level);
    }
 
    return false;
}

References compare_subnode(), ltree_level::len, LEVEL_NEXT, LTREE_FIRST, ltree_strncasecmp(), LVAR_ANYEND, LVAR_INCASE, LVAR_SUBLEXEME, ltree_level::name, and val.

Referenced by ltxtq_exec().

ltree_execute()

bool ltree_execute	(	ITEM *	curitem,
		void *	checkval,
		bool	calcnot,
		bool(*)(void *checkval, ITEM *val)	chkcond
	)

Definition at line 20 of file ltxtquery_op.c.

{
    /* since this function recurses, it could be driven to stack overflow */
    check_stack_depth();
 
    if (curitem->type == VAL)
        return (*chkcond) (checkval, curitem);
    else if (curitem->val == (int32) '!')
    {
        return calcnot ?
            ((ltree_execute(curitem + 1, checkval, calcnot, chkcond)) ? false : true)
            : true;
    }
    else if (curitem->val == (int32) '&')
    {
        if (ltree_execute(curitem + curitem->left, checkval, calcnot, chkcond))
            return ltree_execute(curitem + 1, checkval, calcnot, chkcond);
        else
            return false;
    }
    else
    {                           /* |-operator */
        if (ltree_execute(curitem + curitem->left, checkval, calcnot, chkcond))
            return true;
        else
            return ltree_execute(curitem + 1, checkval, calcnot, chkcond);
    }
}

References check_stack_depth(), ITEM::left, ltree_execute(), ITEM::type, ITEM::val, and VAL.

Referenced by gist_qtxt(), ltree_execute(), and ltxtq_exec().

ltxtq_exec()

Datum ltxtq_exec

(

PG_FUNCTION_ARGS

)

Definition at line 84 of file ltxtquery_op.c.

{
    ltree      *val = PG_GETARG_LTREE_P(0);
    ltxtquery  *query = PG_GETARG_LTXTQUERY_P(1);
    CHKVAL      chkval;
    bool        result;
 
    chkval.node = val;
    chkval.operand = GETOPERAND(query);
 
    result = ltree_execute(GETQUERY(query),
                           &chkval,
                           true,
                           checkcondition_str);
 
    PG_FREE_IF_COPY(val, 0);
    PG_FREE_IF_COPY(query, 1);
    PG_RETURN_BOOL(result);
}

References checkcondition_str(), GETOPERAND, GETQUERY, ltree_execute(), CHKVAL::node, CHKVAL::operand, PG_FREE_IF_COPY, PG_GETARG_LTREE_P, PG_GETARG_LTXTQUERY_P, PG_RETURN_BOOL, and val.

Referenced by _ltxtq_exec(), _ltxtq_extract_exec(), ltree_consistent(), and ltxtq_rexec().

ltxtq_rexec()

Datum ltxtq_rexec

(

PG_FUNCTION_ARGS

)

Definition at line 105 of file ltxtquery_op.c.

{
    PG_RETURN_DATUM(DirectFunctionCall2(ltxtq_exec,
                                        PG_GETARG_DATUM(1),
                                        PG_GETARG_DATUM(0)
                                        ));
}

References DirectFunctionCall2, ltxtq_exec(), PG_GETARG_DATUM, and PG_RETURN_DATUM.

PG_FUNCTION_INFO_V1() [1/2]

PG_FUNCTION_INFO_V1

(

ltxtq_exec

)

PG_FUNCTION_INFO_V1() [2/2]

PG_FUNCTION_INFO_V1

(

ltxtq_rexec

)