lwcollection_same()

char lwcollection_same	(	const LWCOLLECTION *	c1,
		const LWCOLLECTION *	c2
	)

check for same geometry composition

Definition at line 262 of file lwcollection.c.

References LWCOLLECTION::geoms, LW_FALSE, LW_TRUE, LWDEBUG, lwgeom_same(), LWCOLLECTION::ngeoms, and LWCOLLECTION::type.

Referenced by lwgeom_same().

{
        uint32_t i;

        LWDEBUG(2, "lwcollection_same called");

        if ( c1->type != c2->type ) return LW_FALSE;
        if ( c1->ngeoms != c2->ngeoms ) return LW_FALSE;

        for ( i = 0; i < c1->ngeoms; i++ )
        {
                if ( ! lwgeom_same(c1->geoms[i], c2->geoms[i]) )
                        return LW_FALSE;
        }

        /* Former method allowed out-of-order equality between collections

                hit = lwalloc(sizeof(uint32_t)*c1->ngeoms);
                memset(hit, 0, sizeof(uint32_t)*c1->ngeoms);

                for (i=0; i<c1->ngeoms; i++)
                {
                        char found=0;
                        for (j=0; j<c2->ngeoms; j++)
                        {
                                if ( hit[j] ) continue;
                                if ( lwgeom_same(c1->geoms[i], c2->geoms[j]) )
                                {
                                        hit[j] = 1;
                                        found=1;
                                        break;
                                }
                        }
                        if ( ! found ) return LW_FALSE;
                }
        */

        return LW_TRUE;
}

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