mirror of
https://git.osgeo.org/gitea/postgis/postgis
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8c815339fb
git-svn-id: http://svn.osgeo.org/postgis/trunk@5824 b70326c6-7e19-0410-871a-916f4a2858ee
150 lines
3.1 KiB
C
150 lines
3.1 KiB
C
/**********************************************************************
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* $Id$
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.refractions.net
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* Copyright 2001-2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU General Public Licence. See the COPYING file.
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*
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**********************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "liblwgeom.h"
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void
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lwmpoint_release(LWMPOINT *lwmpoint)
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{
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lwgeom_release(lwmpoint_as_lwgeom(lwmpoint));
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}
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LWMPOINT *
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lwmpoint_construct_empty(int srid, char hasz, char hasm)
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{
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LWMPOINT *ret = (LWMPOINT*)lwcollection_construct_empty(srid, hasz, hasm);
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TYPE_SETTYPE(ret->type, MULTIPOINTTYPE);
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return ret;
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}
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LWMPOINT *
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lwmpoint_deserialize(uchar *srl)
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{
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LWMPOINT *result;
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LWGEOM_INSPECTED *insp;
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int type = lwgeom_getType(srl[0]);
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int i;
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if ( type != MULTIPOINTTYPE )
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{
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lwerror("lwmpoint_deserialize called on NON multipoint: %d - %s",
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type, lwtype_name(type));
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return NULL;
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}
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insp = lwgeom_inspect(srl);
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result = lwalloc(sizeof(LWMPOINT));
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result->type = insp->type;
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result->SRID = insp->SRID;
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result->ngeoms = insp->ngeometries;
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if ( insp->ngeometries )
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{
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result->geoms = lwalloc(sizeof(LWPOINT *)*insp->ngeometries);
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}
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else
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{
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result->geoms = NULL;
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}
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if (lwgeom_hasBBOX(srl[0]))
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{
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result->bbox = lwalloc(sizeof(BOX2DFLOAT4));
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memcpy(result->bbox, srl+1, sizeof(BOX2DFLOAT4));
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}
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else
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{
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result->bbox = NULL;
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}
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for (i=0; i<insp->ngeometries; i++)
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{
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result->geoms[i] = lwpoint_deserialize(insp->sub_geoms[i]);
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if ( TYPE_NDIMS(result->geoms[i]->type) != TYPE_NDIMS(result->type) )
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{
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lwerror("Mixed dimensions (multipoint:%d, point%d:%d)",
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TYPE_NDIMS(result->type), i,
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TYPE_NDIMS(result->geoms[i]->type)
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);
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return NULL;
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}
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}
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lwinspected_release(insp);
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return result;
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}
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LWMPOINT* lwmpoint_add_lwpoint(LWMPOINT *mobj, const LWPOINT *obj)
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{
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LWDEBUG(4, "Called");
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return (LWMPOINT*)lwcollection_add_lwgeom((LWCOLLECTION*)mobj, (LWGEOM*)obj);
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}
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void lwmpoint_free(LWMPOINT *mpt)
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{
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int i;
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if ( mpt->bbox )
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{
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lwfree(mpt->bbox);
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}
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for ( i = 0; i < mpt->ngeoms; i++ )
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{
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if ( mpt->geoms[i] )
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{
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lwpoint_free(mpt->geoms[i]);
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}
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}
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if ( mpt->geoms )
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{
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lwfree(mpt->geoms);
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}
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lwfree(mpt);
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}
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LWGEOM*
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lwmpoint_remove_repeated_points(LWMPOINT *mpoint)
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{
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uint32 nnewgeoms;
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uint32 i, j;
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LWGEOM **newgeoms;
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newgeoms = lwalloc(sizeof(LWGEOM *)*mpoint->ngeoms);
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nnewgeoms = 0;
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for (i=0; i<mpoint->ngeoms; ++i)
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{
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/* Brute force, may be optimized by building an index */
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int seen=0;
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for (j=0; j<nnewgeoms; ++j)
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{
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if ( lwpoint_same((LWPOINT*)newgeoms[j],
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(LWPOINT*)mpoint->geoms[i]) )
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{
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seen=1;
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break;
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}
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}
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if ( seen ) continue;
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newgeoms[nnewgeoms++] = (LWGEOM*)lwpoint_clone(mpoint->geoms[i]);
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}
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return (LWGEOM*)lwcollection_construct(mpoint->type,
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mpoint->SRID, mpoint->bbox ? box2d_clone(mpoint->bbox) : NULL,
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nnewgeoms, newgeoms);
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}
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