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lwout_gml.c
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/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* PostGIS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright 2011 Sandro Santilli <strk@kbt.io>
* Copyright 2010-2012 Oslandia
* Copyright 2001-2003 Refractions Research Inc.
*
**********************************************************************/
/**
* @file GML output routines.
*
**********************************************************************/
#include <string.h>
#include "liblwgeom_internal.h"
static size_t asgml2_point_size(const LWPOINT *point, const char *srs, int precision, const char *prefix);
static char *asgml2_point(const LWPOINT *point, const char *srs, int precision, const char *prefix);
static size_t asgml2_line_size(const LWLINE *line, const char *srs, int precision, const char *prefix);
static char *asgml2_line(const LWLINE *line, const char *srs, int precision, const char *prefix);
static size_t asgml2_poly_size(const LWPOLY *poly, const char *srs, int precision, const char *prefix);
static char *asgml2_poly(const LWPOLY *poly, const char *srs, int precision, const char *prefix);
static size_t asgml2_multi_size(const LWCOLLECTION *col, const char *srs, int precision, const char *prefix);
static char *asgml2_multi(const LWCOLLECTION *col, const char *srs, int precision, const char *prefix);
static size_t asgml2_collection_size(const LWCOLLECTION *col, const char *srs, int precision, const char *prefix);
static char *asgml2_collection(const LWCOLLECTION *col, const char *srs, int precision, const char *prefix);
static size_t pointArray_toGML2(POINTARRAY *pa, char *buf, int precision);
static size_t asgml3_point_size(const LWPOINT *point, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_point(const LWPOINT *point, const char *srs, int precision, int opts, const char *prefix, const char *id);
static size_t asgml3_line_size(const LWLINE *line, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_line(const LWLINE *line, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_circstring( const LWCIRCSTRING *circ, const char *srs, int precision, int opts, const char *prefix, const char *id );
static size_t asgml3_poly_size(const LWPOLY *poly, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_poly(const LWPOLY *poly, const char *srs, int precision, int opts, int is_patch, const char *prefix, const char *id);
static char * asgml3_curvepoly(const LWCURVEPOLY* poly, const char *srs, int precision, int opts, const char *prefix, const char *id);
static size_t asgml3_triangle_size(const LWTRIANGLE *triangle, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_triangle(const LWTRIANGLE *triangle, const char *srs, int precision, int opts, const char *prefix, const char *id);
static size_t asgml3_multi_size(const LWCOLLECTION *col, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_multi(const LWCOLLECTION *col, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_psurface(const LWPSURFACE *psur, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_tin(const LWTIN *tin, const char *srs, int precision, int opts, const char *prefix, const char *id);
static size_t asgml3_collection_size(const LWCOLLECTION *col, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_collection(const LWCOLLECTION *col, const char *srs, int precision, int opts, const char *prefix, const char *id);
static char *asgml3_compound(const LWCOMPOUND *col, const char *srs, int precision, int opts, const char *prefix, const char *id );
static char *asgml3_multicurve( const LWMCURVE* cur, const char *srs, int precision, int opts, const char *prefix, const char *id );
static char *asgml3_multisurface(const LWMSURFACE *sur, const char *srs, int precision, int opts, const char *prefix, const char *id);
static size_t pointArray_toGML3(POINTARRAY *pa, char *buf, int precision, int opts);
static size_t pointArray_GMLsize(POINTARRAY *pa, int precision);
static char *
gbox_to_gml2(const GBOX *bbox, const char *srs, int precision, const char *prefix)
{
int size;
POINT4D pt;
POINTARRAY *pa;
char *ptr, *output;
size_t prefixlen = strlen(prefix);
if ( ! bbox )
{
size = ( sizeof("<Box>/") + (prefixlen*2) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
ptr = output = lwalloc(size);
ptr += sprintf(ptr, "<%sBox", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
ptr += sprintf(ptr, "/>");
return output;
}
pa = ptarray_construct_empty(FLAGS_GET_Z(bbox->flags), 0, 2);
pt.x = bbox->xmin;
pt.y = bbox->ymin;
if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmin;
ptarray_append_point(pa, &pt, LW_TRUE);
pt.x = bbox->xmax;
pt.y = bbox->ymax;
if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmax;
ptarray_append_point(pa, &pt, LW_TRUE);
size = pointArray_GMLsize(pa, precision);
size += ( sizeof("<Box><coordinates>/") + (prefixlen*2) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
ptr = output = lwalloc(size);
if ( srs ) ptr += sprintf(ptr, "<%sBox srsName=\"%s\">", prefix, srs);
else ptr += sprintf(ptr, "<%sBox>", prefix);
ptr += sprintf(ptr, "<%scoordinates>", prefix);
ptr += pointArray_toGML2(pa, ptr, precision);
ptr += sprintf(ptr, "</%scoordinates></%sBox>", prefix, prefix);
ptarray_free(pa);
return output;
}
static char *
gbox_to_gml3(const GBOX *bbox, const char *srs, int precision, int opts, const char *prefix)
{
int size;
POINT4D pt;
POINTARRAY *pa;
char *ptr, *output;
size_t prefixlen = strlen(prefix);
int dimension = 2;
if ( ! bbox )
{
size = ( sizeof("<Envelope>/") + (prefixlen*2) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
ptr = output = lwalloc(size);
ptr += sprintf(ptr, "<%sEnvelope", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
ptr += sprintf(ptr, "/>");
return output;
}
if (FLAGS_GET_Z(bbox->flags)) dimension = 3;
pa = ptarray_construct_empty(FLAGS_GET_Z(bbox->flags), 0, 1);
pt.x = bbox->xmin;
pt.y = bbox->ymin;
if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmin;
ptarray_append_point(pa, &pt, LW_TRUE);
size = pointArray_GMLsize(pa, precision) * 2;
size += ( sizeof("<Envelope><lowerCorner><upperCorner>//") + (prefixlen*3) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
if ( IS_DIMS(opts) ) size += sizeof(" srsDimension=. .");
ptr = output = lwalloc(size);
ptr += sprintf(ptr, "<%sEnvelope", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if ( IS_DIMS(opts) ) ptr += sprintf(ptr, " srsDimension=\"%d\"", dimension);
ptr += sprintf(ptr, ">");
ptr += sprintf(ptr, "<%slowerCorner>", prefix);
ptr += pointArray_toGML3(pa, ptr, precision, opts);
ptr += sprintf(ptr, "</%slowerCorner>", prefix);
ptarray_remove_point(pa, 0);
pt.x = bbox->xmax;
pt.y = bbox->ymax;
if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmax;
ptarray_append_point(pa, &pt, LW_TRUE);
ptr += sprintf(ptr, "<%supperCorner>", prefix);
ptr += pointArray_toGML3(pa, ptr, precision, opts);
ptr += sprintf(ptr, "</%supperCorner>", prefix);
ptr += sprintf(ptr, "</%sEnvelope>", prefix);
ptarray_free(pa);
return output;
}
extern char *
lwgeom_extent_to_gml2(const LWGEOM *geom, const char *srs, int precision, const char *prefix)
{
const GBOX* bbox = lwgeom_get_bbox(geom);
/*
if ( ! bbox ) {
lwerror("lwgeom_extent_to_gml2: empty geometry doesn't have a bounding box");
return NULL;
}
*/
char *ret = gbox_to_gml2(bbox, srs, precision, prefix);
return ret;
}
extern char *
lwgeom_extent_to_gml3(const LWGEOM *geom, const char *srs, int precision, int opts, const char *prefix)
{
const GBOX* bbox = lwgeom_get_bbox(geom);
/*
if ( ! bbox ) {
lwerror("lwgeom_extent_to_gml3: empty geometry doesn't have a bounding box");
return NULL;
}
*/
return gbox_to_gml3(bbox, srs, precision, opts, prefix);
}
/**
* @brief VERSION GML 2
* takes a GEOMETRY and returns a GML2 representation
*/
extern char *
lwgeom_to_gml2(const LWGEOM *geom, const char *srs, int precision, const char* prefix)
{
int type = geom->type;
/* Return null for empty (#1377) */
if ( lwgeom_is_empty(geom) )
return NULL;
switch (type)
{
case POINTTYPE:
return asgml2_point((LWPOINT*)geom, srs, precision, prefix);
case LINETYPE:
return asgml2_line((LWLINE*)geom, srs, precision, prefix);
case POLYGONTYPE:
return asgml2_poly((LWPOLY*)geom, srs, precision, prefix);
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
return asgml2_multi((LWCOLLECTION*)geom, srs, precision, prefix);
case COLLECTIONTYPE:
return asgml2_collection((LWCOLLECTION*)geom, srs, precision, prefix);
case TRIANGLETYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
lwerror("Cannot convert %s to GML2. Try ST_AsGML(3, <geometry>) to generate GML3.", lwtype_name(type));
return NULL;
default:
lwerror("lwgeom_to_gml2: '%s' geometry type not supported", lwtype_name(type));
return NULL;
}
}
static size_t
asgml2_point_size(const LWPOINT *point, const char *srs, int precision, const char* prefix)
{
int size;
size_t prefixlen = strlen(prefix);
size = pointArray_GMLsize(point->point, precision);
size += ( sizeof("<point><coordinates>/") + (prefixlen*2) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
return size;
}
static size_t
asgml2_point_buf(const LWPOINT *point, const char *srs, char *output, int precision, const char* prefix)
{
char *ptr = output;
ptr += sprintf(ptr, "<%sPoint", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if ( lwpoint_is_empty(point) )
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
ptr += sprintf(ptr, "<%scoordinates>", prefix);
ptr += pointArray_toGML2(point->point, ptr, precision);
ptr += sprintf(ptr, "</%scoordinates></%sPoint>", prefix, prefix);
return (ptr-output);
}
static char *
asgml2_point(const LWPOINT *point, const char *srs, int precision, const char *prefix)
{
char *output;
int size;
size = asgml2_point_size(point, srs, precision, prefix);
output = lwalloc(size);
asgml2_point_buf(point, srs, output, precision, prefix);
return output;
}
static size_t
asgml2_line_size(const LWLINE *line, const char *srs, int precision, const char *prefix)
{
int size;
size_t prefixlen = strlen(prefix);
size = pointArray_GMLsize(line->points, precision);
size += ( sizeof("<linestring><coordinates>/") + (prefixlen*2) ) * 2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
return size;
}
static size_t
asgml2_line_buf(const LWLINE *line, const char *srs, char *output, int precision,
const char *prefix)
{
char *ptr=output;
ptr += sprintf(ptr, "<%sLineString", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if ( lwline_is_empty(line) )
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
ptr += sprintf(ptr, "<%scoordinates>", prefix);
ptr += pointArray_toGML2(line->points, ptr, precision);
ptr += sprintf(ptr, "</%scoordinates></%sLineString>", prefix, prefix);
return (ptr-output);
}
static char *
asgml2_line(const LWLINE *line, const char *srs, int precision, const char *prefix)
{
char *output;
int size;
size = asgml2_line_size(line, srs, precision, prefix);
output = lwalloc(size);
asgml2_line_buf(line, srs, output, precision, prefix);
return output;
}
static size_t
asgml2_poly_size(const LWPOLY *poly, const char *srs, int precision, const char *prefix)
{
size_t size;
int i;
size_t prefixlen = strlen(prefix);
size = sizeof("<polygon></polygon>") + prefixlen*2;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
if ( lwpoly_is_empty(poly) )
return size;
size += ( sizeof("<outerboundaryis><linearring><coordinates>/") + ( prefixlen*3) ) * 2;
size += ( sizeof("<innerboundaryis><linearring><coordinates>/") + ( prefixlen*2) ) * 2 * poly->nrings;
for (i=0; i<poly->nrings; i++)
size += pointArray_GMLsize(poly->rings[i], precision);
return size;
}
static size_t
asgml2_poly_buf(const LWPOLY *poly, const char *srs, char *output, int precision,
const char *prefix)
{
int i;
char *ptr=output;
ptr += sprintf(ptr, "<%sPolygon", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if ( lwpoly_is_empty(poly) )
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
ptr += sprintf(ptr, "<%souterBoundaryIs><%sLinearRing><%scoordinates>",
prefix, prefix, prefix);
ptr += pointArray_toGML2(poly->rings[0], ptr, precision);
ptr += sprintf(ptr, "</%scoordinates></%sLinearRing></%souterBoundaryIs>", prefix, prefix, prefix);
for (i=1; i<poly->nrings; i++)
{
ptr += sprintf(ptr, "<%sinnerBoundaryIs><%sLinearRing><%scoordinates>", prefix, prefix, prefix);
ptr += pointArray_toGML2(poly->rings[i], ptr, precision);
ptr += sprintf(ptr, "</%scoordinates></%sLinearRing></%sinnerBoundaryIs>", prefix, prefix, prefix);
}
ptr += sprintf(ptr, "</%sPolygon>", prefix);
return (ptr-output);
}
static char *
asgml2_poly(const LWPOLY *poly, const char *srs, int precision, const char *prefix)
{
char *output;
int size;
size = asgml2_poly_size(poly, srs, precision, prefix);
output = lwalloc(size);
asgml2_poly_buf(poly, srs, output, precision, prefix);
return output;
}
/*
* Compute max size required for GML version of this
* inspected geometry. Will recurse when needed.
* Don't call this with single-geoms inspected.
*/
static size_t
asgml2_multi_size(const LWCOLLECTION *col, const char *srs, int precision,
const char *prefix)
{
int i;
size_t size;
size_t prefixlen = strlen(prefix);
LWGEOM *subgeom;
/* the longest possible multi version */
size = sizeof("<MultiLineString></MultiLineString>");
size += 2*prefixlen;
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
for (i=0; i<col->ngeoms; i++)
{
subgeom = col->geoms[i];
if (subgeom->type == POINTTYPE)
{
size += ( sizeof("<pointMember>/") + prefixlen ) * 2;
size += asgml2_point_size((LWPOINT*)subgeom, 0, precision, prefix);
}
else if (subgeom->type == LINETYPE)
{
size += ( sizeof("<lineStringMember>/") + prefixlen ) * 2;
size += asgml2_line_size((LWLINE*)subgeom, 0, precision, prefix);
}
else if (subgeom->type == POLYGONTYPE)
{
size += ( sizeof("<polygonMember>/") + prefixlen ) * 2;
size += asgml2_poly_size((LWPOLY*)subgeom, 0, precision, prefix);
}
}
return size;
}
/*
* Don't call this with single-geoms inspected!
*/
static size_t
asgml2_multi_buf(const LWCOLLECTION *col, const char *srs, char *output,
int precision, const char *prefix)
{
int type = col->type;
char *ptr, *gmltype;
int i;
LWGEOM *subgeom;
ptr = output;
gmltype="";
if (type == MULTIPOINTTYPE) gmltype = "MultiPoint";
else if (type == MULTILINETYPE) gmltype = "MultiLineString";
else if (type == MULTIPOLYGONTYPE) gmltype = "MultiPolygon";
/* Open outmost tag */
ptr += sprintf(ptr, "<%s%s", prefix, gmltype);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if (!col->ngeoms)
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
for (i=0; i<col->ngeoms; i++)
{
subgeom = col->geoms[i];
if (subgeom->type == POINTTYPE)
{
ptr += sprintf(ptr, "<%spointMember>", prefix);
ptr += asgml2_point_buf((LWPOINT*)subgeom, 0, ptr, precision, prefix);
ptr += sprintf(ptr, "</%spointMember>", prefix);
}
else if (subgeom->type == LINETYPE)
{
ptr += sprintf(ptr, "<%slineStringMember>", prefix);
ptr += asgml2_line_buf((LWLINE*)subgeom, 0, ptr, precision, prefix);
ptr += sprintf(ptr, "</%slineStringMember>", prefix);
}
else if (subgeom->type == POLYGONTYPE)
{
ptr += sprintf(ptr, "<%spolygonMember>", prefix);
ptr += asgml2_poly_buf((LWPOLY*)subgeom, 0, ptr, precision, prefix);
ptr += sprintf(ptr, "</%spolygonMember>", prefix);
}
}
/* Close outmost tag */
ptr += sprintf(ptr, "</%s%s>", prefix, gmltype);
return (ptr-output);
}
/*
* Don't call this with single-geoms inspected!
*/
static char *
asgml2_multi(const LWCOLLECTION *col, const char *srs, int precision,
const char *prefix)
{
char *gml;
size_t size;
size = asgml2_multi_size(col, srs, precision, prefix);
gml = lwalloc(size);
asgml2_multi_buf(col, srs, gml, precision, prefix);
return gml;
}
/*
* Don't call this with single-geoms!
*/
static size_t
asgml2_collection_size(const LWCOLLECTION *col, const char *srs, int precision,
const char *prefix)
{
int i;
size_t size;
size_t prefixlen = strlen(prefix);
LWGEOM *subgeom;
size = sizeof("<MultiGeometry></MultiGeometry>");
size += (prefixlen * 2);
if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
for (i=0; i<col->ngeoms; i++)
{
subgeom = col->geoms[i];
size += ( sizeof("<geometryMember>/") + prefixlen ) * 2;
if ( subgeom->type == POINTTYPE)
{
size += asgml2_point_size((LWPOINT*)subgeom, 0, precision, prefix);
}
else if ( subgeom->type == LINETYPE)
{
size += asgml2_line_size((LWLINE*)subgeom, 0, precision, prefix);
}
else if ( subgeom->type == POLYGONTYPE)
{
size += asgml2_poly_size((LWPOLY*)subgeom, 0, precision, prefix);
}
else if ( lwgeom_is_collection(subgeom) )
{
size += asgml2_collection_size((LWCOLLECTION*)subgeom, 0, precision, prefix);
}
else
lwerror("asgml2_collection_size: Unable to process geometry type!");
}
return size;
}
/*
* Don't call this with single-geoms inspected!
*/
static size_t
asgml2_collection_buf(const LWCOLLECTION *col, const char *srs, char *output, int precision, const char *prefix)
{
char *ptr;
int i;
LWGEOM *subgeom;
ptr = output;
/* Open outmost tag */
ptr += sprintf(ptr, "<%sMultiGeometry", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if (!col->ngeoms)
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
for (i=0; i<col->ngeoms; i++)
{
subgeom = col->geoms[i];
ptr += sprintf(ptr, "<%sgeometryMember>", prefix);
if (subgeom->type == POINTTYPE)
{
ptr += asgml2_point_buf((LWPOINT*)subgeom, 0, ptr, precision, prefix);
}
else if (subgeom->type == LINETYPE)
{
ptr += asgml2_line_buf((LWLINE*)subgeom, 0, ptr, precision, prefix);
}
else if (subgeom->type == POLYGONTYPE)
{
ptr += asgml2_poly_buf((LWPOLY*)subgeom, 0, ptr, precision, prefix);
}
else if (lwgeom_is_collection(subgeom))
{
if (subgeom->type == COLLECTIONTYPE)
ptr += asgml2_collection_buf((LWCOLLECTION*)subgeom, 0, ptr, precision, prefix);
else
ptr += asgml2_multi_buf((LWCOLLECTION*)subgeom, 0, ptr, precision, prefix);
}
ptr += sprintf(ptr, "</%sgeometryMember>", prefix);
}
/* Close outmost tag */
ptr += sprintf(ptr, "</%sMultiGeometry>", prefix);
return (ptr-output);
}
/*
* Don't call this with single-geoms inspected!
*/
static char *
asgml2_collection(const LWCOLLECTION *col, const char *srs, int precision,
const char *prefix)
{
char *gml;
size_t size;
size = asgml2_collection_size(col, srs, precision, prefix);
gml = lwalloc(size);
asgml2_collection_buf(col, srs, gml, precision, prefix);
return gml;
}
static size_t
pointArray_toGML2(POINTARRAY *pa, char *output, int precision)
{
int i;
char *ptr;
char x[OUT_MAX_DIGS_DOUBLE+OUT_MAX_DOUBLE_PRECISION+1];
char y[OUT_MAX_DIGS_DOUBLE+OUT_MAX_DOUBLE_PRECISION+1];
char z[OUT_MAX_DIGS_DOUBLE+OUT_MAX_DOUBLE_PRECISION+1];
ptr = output;
if ( ! FLAGS_GET_Z(pa->flags) )
{
for (i=0; i<pa->npoints; i++)
{
const POINT2D *pt;
pt = getPoint2d_cp(pa, i);
if (fabs(pt->x) < OUT_MAX_DOUBLE)
sprintf(x, "%.*f", precision, pt->x);
else
sprintf(x, "%g", pt->x);
trim_trailing_zeros(x);
if (fabs(pt->y) < OUT_MAX_DOUBLE)
sprintf(y, "%.*f", precision, pt->y);
else
sprintf(y, "%g", pt->y);
trim_trailing_zeros(y);
if ( i ) ptr += sprintf(ptr, " ");
ptr += sprintf(ptr, "%s,%s", x, y);
}
}
else
{
for (i=0; i<pa->npoints; i++)
{
const POINT3DZ *pt;
pt = getPoint3dz_cp(pa, i);
if (fabs(pt->x) < OUT_MAX_DOUBLE)
sprintf(x, "%.*f", precision, pt->x);
else
sprintf(x, "%g", pt->x);
trim_trailing_zeros(x);
if (fabs(pt->y) < OUT_MAX_DOUBLE)
sprintf(y, "%.*f", precision, pt->y);
else
sprintf(y, "%g", pt->y);
trim_trailing_zeros(y);
if (fabs(pt->z) < OUT_MAX_DOUBLE)
sprintf(z, "%.*f", precision, pt->z);
else
sprintf(z, "%g", pt->z);
trim_trailing_zeros(z);
if ( i ) ptr += sprintf(ptr, " ");
ptr += sprintf(ptr, "%s,%s,%s", x, y, z);
}
}
return ptr-output;
}
/*
* VERSION GML 3.1.1
*/
/* takes a GEOMETRY and returns a GML representation */
extern char *
lwgeom_to_gml3(const LWGEOM *geom, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
int type = geom->type;
/* Return null for empty (#1377) */
if ( lwgeom_is_empty(geom) )
return NULL;
switch (type)
{
case POINTTYPE:
return asgml3_point((LWPOINT*)geom, srs, precision, opts, prefix, id);
case LINETYPE:
return asgml3_line((LWLINE*)geom, srs, precision, opts, prefix, id);
case CIRCSTRINGTYPE:
return asgml3_circstring((LWCIRCSTRING*)geom, srs, precision, opts, prefix, id );
case POLYGONTYPE:
return asgml3_poly((LWPOLY*)geom, srs, precision, opts, 0, prefix, id);
case CURVEPOLYTYPE:
return asgml3_curvepoly((LWCURVEPOLY*)geom, srs, precision, opts, prefix, id);
case TRIANGLETYPE:
return asgml3_triangle((LWTRIANGLE*)geom, srs, precision, opts, prefix, id);
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
return asgml3_multi((LWCOLLECTION*)geom, srs, precision, opts, prefix, id);
case POLYHEDRALSURFACETYPE:
return asgml3_psurface((LWPSURFACE*)geom, srs, precision, opts, prefix, id);
case TINTYPE:
return asgml3_tin((LWTIN*)geom, srs, precision, opts, prefix, id);
case COLLECTIONTYPE:
return asgml3_collection((LWCOLLECTION*)geom, srs, precision, opts, prefix, id);
case COMPOUNDTYPE:
return asgml3_compound( (LWCOMPOUND*)geom, srs, precision, opts, prefix, id );
case MULTICURVETYPE:
return asgml3_multicurve( (LWMCURVE*)geom, srs, precision, opts, prefix, id );
case MULTISURFACETYPE:
return asgml3_multisurface( (LWMSURFACE*)geom, srs, precision, opts, prefix, id );
default:
lwerror("lwgeom_to_gml3: '%s' geometry type not supported", lwtype_name(type));
return NULL;
}
}
static size_t
asgml3_point_size(const LWPOINT *point, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
int size;
size_t prefixlen = strlen(prefix);
size = pointArray_GMLsize(point->point, precision);
size += ( sizeof("<point><pos>/") + (prefixlen*2) ) * 2;
if (srs) size += strlen(srs) + sizeof(" srsName=..");
if (id) size += strlen(id) + strlen(prefix) + sizeof(" id=..");
if (IS_DIMS(opts)) size += sizeof(" srsDimension='x'");
return size;
}
static size_t
asgml3_point_buf(const LWPOINT *point, const char *srs, char *output, int precision, int opts, const char *prefix, const char *id)
{
char *ptr = output;
int dimension=2;
if (FLAGS_GET_Z(point->flags)) dimension = 3;
ptr += sprintf(ptr, "<%sPoint", prefix);
if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if ( id ) ptr += sprintf(ptr, " %sid=\"%s\"", prefix, id);
if ( lwpoint_is_empty(point) )
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
if (IS_DIMS(opts)) ptr += sprintf(ptr, "<%spos srsDimension=\"%d\">", prefix, dimension);
else ptr += sprintf(ptr, "<%spos>", prefix);
ptr += pointArray_toGML3(point->point, ptr, precision, opts);
ptr += sprintf(ptr, "</%spos></%sPoint>", prefix, prefix);
return (ptr-output);
}
static char *
asgml3_point(const LWPOINT *point, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
char *output;
int size;
size = asgml3_point_size(point, srs, precision, opts, prefix, id);
output = lwalloc(size);
asgml3_point_buf(point, srs, output, precision, opts, prefix, id);
return output;
}
static size_t
asgml3_line_size(const LWLINE *line, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
int size;
size_t prefixlen = strlen(prefix);
size = pointArray_GMLsize(line->points, precision);
if ( opts & LW_GML_SHORTLINE )
{
size += (
sizeof("<LineString><posList>/") +
( prefixlen * 2 )
) * 2;
}
else
{
size += (
sizeof("<Curve><segments><LineStringSegment><posList>/") +
( prefixlen * 4 )
) * 2;
}
if (srs) size += strlen(srs) + sizeof(" srsName=..");
if (id) size += strlen(id) + strlen(prefix) + sizeof(" id=..");
if (IS_DIMS(opts)) size += sizeof(" srsDimension='x'");
return size;
}
static size_t
asgml3_line_buf(const LWLINE *line, const char *srs, char *output, int precision, int opts, const char *prefix, const char *id)
{
char *ptr=output;
int dimension=2;
int shortline = ( opts & LW_GML_SHORTLINE );
if (FLAGS_GET_Z(line->flags)) dimension = 3;
if ( shortline )
{
ptr += sprintf(ptr, "<%sLineString", prefix);
}
else
{
ptr += sprintf(ptr, "<%sCurve", prefix);
}
if (srs) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
if (id) ptr += sprintf(ptr, " %sid=\"%s\"", prefix, id);
if ( lwline_is_empty(line) )
{
ptr += sprintf(ptr, "/>");
return (ptr-output);
}
ptr += sprintf(ptr, ">");
if ( ! shortline )
{
ptr += sprintf(ptr, "<%ssegments>", prefix);
ptr += sprintf(ptr, "<%sLineStringSegment>", prefix);
}
if (IS_DIMS(opts))
{
ptr += sprintf(ptr, "<%sposList srsDimension=\"%d\">",
prefix, dimension);
}
else
{
ptr += sprintf(ptr, "<%sposList>", prefix);
}
ptr += pointArray_toGML3(line->points, ptr, precision, opts);
ptr += sprintf(ptr, "</%sposList>", prefix);
if ( shortline )
{
ptr += sprintf(ptr, "</%sLineString>", prefix);
}
else
{
ptr += sprintf(ptr, "</%sLineStringSegment>", prefix);
ptr += sprintf(ptr, "</%ssegments>", prefix);
ptr += sprintf(ptr, "</%sCurve>", prefix);
}
return (ptr-output);
}
static char *
asgml3_line(const LWLINE *line, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
char *output;
int size;
size = asgml3_line_size(line, srs, precision, opts, prefix, id);
output = lwalloc(size);
asgml3_line_buf(line, srs, output, precision, opts, prefix, id);
return output;
}
static size_t
asgml3_circstring_size(const LWCIRCSTRING *circ, const char *srs, int precision, int opts, const char *prefix, const char *id)
{
int size = pointArray_GMLsize( circ->points, precision );
size_t prefixlen = strlen(prefix);
size += 2 * ( sizeof( "<Curve><segments>/" ) + 2 * prefixlen );
size += 2 * ( sizeof( "<ArcString><posList>/" ) + 2 * prefixlen );
if (srs) size += strlen(srs) + sizeof(" srsName=..");
if (id) size += strlen(id) + strlen(prefix) + sizeof(" id=..");
if (IS_DIMS(opts)) size += sizeof(" srsDimension='x'");
return size;
}
static size_t
asgml3_circstring_buf(const LWCIRCSTRING *circ, const char *srs, char *output, int precision, int opts, const char *prefix, const char *id)
{
char* ptr = output;
int dimension=2;
if (FLAGS_GET_Z(circ->flags))
{
dimension = 3;
}
ptr += sprintf(ptr, "<%sCurve", prefix);
if (srs)
{
ptr += sprintf(ptr, " srsName=\"%s\"", srs);
}
if (id)
{
ptr += sprintf(ptr, " %sid=\"%s\"", prefix, id);
}
ptr += sprintf(ptr, ">");
ptr += sprintf(ptr, "<%ssegments>", prefix);
ptr += sprintf(ptr, "<%sArcString>", prefix);
ptr += sprintf(ptr, "<%sposList", prefix);
if (IS_DIMS(opts))
{
ptr += sprintf(ptr, " srsDimension=\"%d\"", dimension);
}
ptr += sprintf(ptr, ">");
ptr += pointArray_toGML3(circ->points, ptr, precision, opts);
ptr += sprintf(ptr, "</%sposList>", prefix);
ptr += sprintf(ptr, "</%sArcString>", prefix);
ptr += sprintf(ptr, "</%ssegments>", prefix);
ptr += sprintf(ptr, "</%sCurve>", prefix);
return (ptr-output);
}
static char *