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119 lines
3.1 KiB
C
119 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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LWCOMPOUND *
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lwcompound_deserialize(uchar *serialized)
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{
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LWCOMPOUND *result;
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LWGEOM_INSPECTED *insp;
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int type = lwgeom_getType(serialized[0]);
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int i;
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if (type != COMPOUNDTYPE)
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{
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lwerror("lwcompound_deserialize called on non compound: %d", type);
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return NULL;
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}
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insp = lwgeom_inspect(serialized);
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result = lwalloc(sizeof(LWCOMPOUND));
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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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result->geoms = lwalloc(sizeof(LWGEOM *)*insp->ngeometries);
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if (lwgeom_hasBBOX(serialized[0]))
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{
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result->bbox = lwalloc(sizeof(BOX2DFLOAT4));
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memcpy(result->bbox, serialized + 1, sizeof(BOX2DFLOAT4));
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}
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else result->bbox = NULL;
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for (i = 0; i < insp->ngeometries; i++)
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{
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if (lwgeom_getType(insp->sub_geoms[i][0]) == LINETYPE)
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result->geoms[i] = (LWGEOM *)lwline_deserialize(insp->sub_geoms[i]);
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else
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result->geoms[i] = (LWGEOM *)lwcircstring_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 (compound: %d, line/circularstring %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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lwfree(result);
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return NULL;
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}
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}
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return result;
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}
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/**
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* Add 'what' to this string at position 'where'
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* @param where if = 0 then prepend, if -1 then append
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* @param what an #LWGEOM object
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* @return a {@link #LWCOMPOUND} or a {@link #GEOMETRYCOLLECTION}
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*/
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LWGEOM *
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lwcompound_add(const LWCOMPOUND *to, uint32 where, const LWGEOM *what)
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{
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LWCOLLECTION *col;
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LWGEOM **geoms;
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int newtype;
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LWDEBUG(2, "lwcompound_add called.");
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if (where != -1 && where != 0)
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{
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lwerror("lwcompound_add only supports 0 or -1 as a second argument, not %d", where);
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return NULL;
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}
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/* dimensions compatibility are checked by caller */
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/* Construct geoms array */
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geoms = lwalloc(sizeof(LWGEOM *)*2);
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if (where == -1) /* append */
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{
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geoms[0] = lwgeom_clone((LWGEOM *)to);
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geoms[1] = lwgeom_clone(what);
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}
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else /* prepend */
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{
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geoms[0] = lwgeom_clone(what);
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geoms[1] = lwgeom_clone((LWGEOM *)to);
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}
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/* reset SRID and wantbbox flag from component types */
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geoms[0]->SRID = geoms[1]->SRID = -1;
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TYPE_SETHASSRID(geoms[0]->type, 0);
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TYPE_SETHASSRID(geoms[1]->type, 0);
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TYPE_SETHASBBOX(geoms[0]->type, 0);
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TYPE_SETHASBBOX(geoms[1]->type, 0);
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/* Find appropriate geom type */
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if (TYPE_GETTYPE(what->type) == LINETYPE || TYPE_GETTYPE(what->type) == CIRCSTRINGTYPE) newtype = COMPOUNDTYPE;
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else newtype = COLLECTIONTYPE;
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col = lwcollection_construct(newtype,
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to->SRID, NULL, 2, geoms);
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return (LWGEOM *)col;
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}
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