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104 lines
2.4 KiB
C
104 lines
2.4 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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LWMCURVE *
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lwmcurve_deserialize(uchar *srl)
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{
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LWMCURVE *result;
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LWGEOM_INSPECTED *insp;
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int stype;
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uchar type = (uchar)srl[0];
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int geomtype = lwgeom_getType(type);
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int i;
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if (geomtype != MULTICURVETYPE)
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{
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lwerror("lwmcurve_deserialize called on NON multicurve: %d - %s", geomtype, lwtype_name(geomtype));
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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(LWMCURVE));
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result->type = MULTICURVETYPE;
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result->flags = gflags(TYPE_HASZ(type), TYPE_HASM(type), 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(LWGEOM *)*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(type))
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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 == CIRCSTRINGTYPE)
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{
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result->geoms[i] = (LWGEOM *)lwcircstring_deserialize(insp->sub_geoms[i]);
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}
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else if (stype == LINETYPE)
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{
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result->geoms[i] = (LWGEOM *)lwline_deserialize(insp->sub_geoms[i]);
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}
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else if (stype == COMPOUNDTYPE)
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{
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result->geoms[i] = (LWGEOM *)lwcompound_deserialize(insp->sub_geoms[i]);
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}
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else
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{
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lwerror("Only Circular strings, Line strings or Compound curves are permitted in a MultiCurve.");
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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 (multicurve: %d, curve %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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