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101 lines
2.3 KiB
C
101 lines
2.3 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_internal.h"
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LWMSURFACE *
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lwmsurface_deserialize(uchar *srl)
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{
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LWMSURFACE *result;
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LWGEOM_INSPECTED *insp;
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int stype;
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int type = lwgeom_getType(srl[0]);
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int i;
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LWDEBUG(2, "lwmsurface_deserialize called");
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if (type != MULTISURFACETYPE)
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{
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lwerror("lwmsurface_deserialize called on a non-multisurface: %d - %s", 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(LWMSURFACE));
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result->type = type;
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FLAGS_SET_Z(result->flags, TYPE_HASZ(srl[0]));
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FLAGS_SET_M(result->flags, TYPE_HASM(srl[0]));
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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(LWPOLY *)*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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BOX2DFLOAT4 *box2df;
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FLAGS_SET_BBOX(result->flags, 1);
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box2df = lwalloc(sizeof(BOX2DFLOAT4));
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memcpy(box2df, srl + 1, sizeof(BOX2DFLOAT4));
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result->bbox = gbox_from_box2df(result->flags, box2df);
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lwfree(box2df);
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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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stype = lwgeom_getType(insp->sub_geoms[i][0]);
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if (stype == POLYGONTYPE)
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{
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result->geoms[i] = (LWGEOM *)lwpoly_deserialize(insp->sub_geoms[i]);
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}
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else if (stype == CURVEPOLYTYPE)
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{
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result->geoms[i] = (LWGEOM *)lwcurvepoly_deserialize(insp->sub_geoms[i]);
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}
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else
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{
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lwerror("Only Polygons and Curved Polygons are supported in a MultiSurface.");
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lwfree(result);
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lwfree(insp);
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return NULL;
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}
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if (FLAGS_NDIMS(result->geoms[i]->flags) != FLAGS_NDIMS(result->flags))
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{
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lwerror("Mixed dimensions (multisurface: %d, surface %d:%d",
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FLAGS_NDIMS(result->flags), i,
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FLAGS_NDIMS(result->geoms[i]->flags));
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lwfree(result);
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lwfree(insp);
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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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