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gml2ogrgeometry.cpp
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/******************************************************************************
*
* Project: GML Reader
* Purpose: Code to translate between GML and OGR geometry forms.
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 2002, Frank Warmerdam
* Copyright (c) 2009-2014, Even Rouault <even dot rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT
*****************************************************************************
*
* Independent Security Audit 2003/04/17 Andrey Kiselev:
* Completed audit of this module. All functions may be used without buffer
* overflows and stack corruptions with any kind of input data.
*
* Security Audit 2003/03/28 warmerda:
* Completed security audit. I believe that this module may be safely used
* to parse, arbitrary GML potentially provided by a hostile source without
* compromising the system.
*
*/
#include "cpl_port.h"
#include "ogr_api.h"
#include <algorithm>
#include <cassert>
#include <cctype>
#include <cmath>
#include <cstdlib>
#include <cstring>
#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_minixml.h"
#include "cpl_string.h"
#include "ogr_core.h"
#include "ogr_geometry.h"
#include "ogr_p.h"
#include "ogr_spatialref.h"
#include "ogr_srs_api.h"
#include "ogr_geo_utils.h"
constexpr double kdfD2R = M_PI / 180.0;
constexpr double kdf2PI = 2.0 * M_PI;
/************************************************************************/
/* GMLGetCoordTokenPos() */
/************************************************************************/
static const char *GMLGetCoordTokenPos(const char *pszStr,
const char **ppszNextToken)
{
char ch;
while (true)
{
// cppcheck-suppress nullPointerRedundantCheck
ch = *pszStr;
if (ch == '\0')
{
*ppszNextToken = pszStr;
return nullptr;
}
else if (!(ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ' ||
ch == ','))
break;
pszStr++;
}
const char *pszToken = pszStr;
while ((ch = *pszStr) != '\0')
{
if (ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ' || ch == ',')
{
*ppszNextToken = pszStr;
return pszToken;
}
pszStr++;
}
*ppszNextToken = pszStr;
return pszToken;
}
/************************************************************************/
/* BareGMLElement() */
/* */
/* Returns the passed string with any namespace prefix */
/* stripped off. */
/************************************************************************/
static const char *BareGMLElement(const char *pszInput)
{
const char *pszReturn = strchr(pszInput, ':');
if (pszReturn == nullptr)
pszReturn = pszInput;
else
pszReturn++;
return pszReturn;
}
/************************************************************************/
/* FindBareXMLChild() */
/* */
/* Find a child node with the indicated "bare" name, that is */
/* after any namespace qualifiers have been stripped off. */
/************************************************************************/
static const CPLXMLNode *FindBareXMLChild(const CPLXMLNode *psParent,
const char *pszBareName)
{
const CPLXMLNode *psCandidate = psParent->psChild;
while (psCandidate != nullptr)
{
if (psCandidate->eType == CXT_Element &&
EQUAL(BareGMLElement(psCandidate->pszValue), pszBareName))
return psCandidate;
psCandidate = psCandidate->psNext;
}
return nullptr;
}
/************************************************************************/
/* GetElementText() */
/************************************************************************/
static const char *GetElementText(const CPLXMLNode *psElement)
{
if (psElement == nullptr)
return nullptr;
const CPLXMLNode *psChild = psElement->psChild;
while (psChild != nullptr)
{
if (psChild->eType == CXT_Text)
return psChild->pszValue;
psChild = psChild->psNext;
}
return nullptr;
}
/************************************************************************/
/* GetChildElement() */
/************************************************************************/
static const CPLXMLNode *GetChildElement(const CPLXMLNode *psElement)
{
if (psElement == nullptr)
return nullptr;
const CPLXMLNode *psChild = psElement->psChild;
while (psChild != nullptr)
{
if (psChild->eType == CXT_Element)
return psChild;
psChild = psChild->psNext;
}
return nullptr;
}
/************************************************************************/
/* GetElementOrientation() */
/* Returns true for positive orientation. */
/************************************************************************/
static bool GetElementOrientation(const CPLXMLNode *psElement)
{
if (psElement == nullptr)
return true;
const CPLXMLNode *psChild = psElement->psChild;
while (psChild != nullptr)
{
if (psChild->eType == CXT_Attribute &&
EQUAL(psChild->pszValue, "orientation"))
return EQUAL(psChild->psChild->pszValue, "+");
psChild = psChild->psNext;
}
return true;
}
/************************************************************************/
/* AddPoint() */
/* */
/* Add a point to the passed geometry. */
/************************************************************************/
static bool AddPoint(OGRGeometry *poGeometry, double dfX, double dfY,
double dfZ, int nDimension)
{
const OGRwkbGeometryType eType = wkbFlatten(poGeometry->getGeometryType());
if (eType == wkbPoint)
{
OGRPoint *poPoint = poGeometry->toPoint();
if (!poPoint->IsEmpty())
{
CPLError(CE_Failure, CPLE_AppDefined,
"More than one coordinate for <Point> element.");
return false;
}
poPoint->setX(dfX);
poPoint->setY(dfY);
if (nDimension == 3)
poPoint->setZ(dfZ);
return true;
}
else if (eType == wkbLineString || eType == wkbCircularString)
{
OGRSimpleCurve *poCurve = poGeometry->toSimpleCurve();
if (nDimension == 3)
poCurve->addPoint(dfX, dfY, dfZ);
else
poCurve->addPoint(dfX, dfY);
return true;
}
CPLAssert(false);
return false;
}
/************************************************************************/
/* ParseGMLCoordinates() */
/************************************************************************/
static bool ParseGMLCoordinates(const CPLXMLNode *psGeomNode,
OGRGeometry *poGeometry, int nSRSDimension)
{
const CPLXMLNode *psCoordinates =
FindBareXMLChild(psGeomNode, "coordinates");
/* -------------------------------------------------------------------- */
/* Handle <coordinates> case. */
/* Note that we don't do a strict validation, so we accept and */
/* sometimes generate output whereas we should just reject it. */
/* -------------------------------------------------------------------- */
if (psCoordinates != nullptr)
{
const char *pszCoordString = GetElementText(psCoordinates);
const char *pszDecimal =
CPLGetXMLValue(psCoordinates, "decimal", nullptr);
char chDecimal = '.';
if (pszDecimal != nullptr)
{
if (strlen(pszDecimal) != 1 ||
(pszDecimal[0] >= '0' && pszDecimal[0] <= '9'))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Wrong value for decimal attribute");
return false;
}
chDecimal = pszDecimal[0];
}
const char *pszCS = CPLGetXMLValue(psCoordinates, "cs", nullptr);
char chCS = ',';
if (pszCS != nullptr)
{
if (strlen(pszCS) != 1 || (pszCS[0] >= '0' && pszCS[0] <= '9'))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Wrong value for cs attribute");
return false;
}
chCS = pszCS[0];
}
const char *pszTS = CPLGetXMLValue(psCoordinates, "ts", nullptr);
char chTS = ' ';
if (pszTS != nullptr)
{
if (strlen(pszTS) != 1 || (pszTS[0] >= '0' && pszTS[0] <= '9'))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Wrong value for ts attribute");
return false;
}
chTS = pszTS[0];
}
if (pszCoordString == nullptr)
{
poGeometry->empty();
return true;
}
// Skip leading whitespace. See
// https://github.com/OSGeo/gdal/issues/5494
while (*pszCoordString != '\0' &&
isspace(static_cast<unsigned char>(*pszCoordString)))
{
pszCoordString++;
}
int iCoord = 0;
const OGRwkbGeometryType eType =
wkbFlatten(poGeometry->getGeometryType());
OGRSimpleCurve *poCurve =
(eType == wkbLineString || eType == wkbCircularString)
? poGeometry->toSimpleCurve()
: nullptr;
for (int iter = (eType == wkbPoint ? 1 : 0); iter < 2; iter++)
{
const char *pszStr = pszCoordString;
double dfX = 0;
double dfY = 0;
iCoord = 0;
while (*pszStr != '\0')
{
int nDimension = 2;
// parse out 2 or 3 tuple.
if (iter == 1)
{
if (chDecimal == '.')
dfX = OGRFastAtof(pszStr);
else
dfX = CPLAtofDelim(pszStr, chDecimal);
}
while (*pszStr != '\0' && *pszStr != chCS &&
!isspace(static_cast<unsigned char>(*pszStr)))
pszStr++;
if (*pszStr == '\0')
{
CPLError(CE_Failure, CPLE_AppDefined,
"Corrupt <coordinates> value.");
return false;
}
else if (chCS == ',' && pszCS == nullptr &&
isspace(static_cast<unsigned char>(*pszStr)))
{
// In theory, the coordinates inside a coordinate tuple
// should be separated by a comma. However it has been found
// in the wild that the coordinates are in rare cases
// separated by a space, and the tuples by a comma. See:
// https://52north.org/twiki/bin/view/Processing/WPS-IDWExtension-ObservationCollectionExample
// or
// http://agisdemo.faa.gov/aixmServices/getAllFeaturesByLocatorId?locatorId=DFW
chCS = ' ';
chTS = ',';
}
pszStr++;
if (iter == 1)
{
if (chDecimal == '.')
dfY = OGRFastAtof(pszStr);
else
dfY = CPLAtofDelim(pszStr, chDecimal);
}
while (*pszStr != '\0' && *pszStr != chCS && *pszStr != chTS &&
!isspace(static_cast<unsigned char>(*pszStr)))
pszStr++;
double dfZ = 0.0;
if (*pszStr == chCS)
{
pszStr++;
if (iter == 1)
{
if (chDecimal == '.')
dfZ = OGRFastAtof(pszStr);
else
dfZ = CPLAtofDelim(pszStr, chDecimal);
}
nDimension = 3;
while (*pszStr != '\0' && *pszStr != chCS &&
*pszStr != chTS &&
!isspace(static_cast<unsigned char>(*pszStr)))
pszStr++;
}
if (*pszStr == chTS)
{
pszStr++;
}
while (isspace(static_cast<unsigned char>(*pszStr)))
pszStr++;
if (iter == 1)
{
if (poCurve)
{
if (nDimension == 3)
poCurve->setPoint(iCoord, dfX, dfY, dfZ);
else
poCurve->setPoint(iCoord, dfX, dfY);
}
else if (!AddPoint(poGeometry, dfX, dfY, dfZ, nDimension))
return false;
}
iCoord++;
}
if (poCurve && iter == 0)
{
poCurve->setNumPoints(iCoord);
}
}
return iCoord > 0;
}
/* -------------------------------------------------------------------- */
/* Is this a "pos"? GML 3 construct. */
/* Parse if it exist a series of pos elements (this would allow */
/* the correct parsing of gml3.1.1 geometries such as linestring */
/* defined with pos elements. */
/* -------------------------------------------------------------------- */
bool bHasFoundPosElement = false;
for (const CPLXMLNode *psPos = psGeomNode->psChild; psPos != nullptr;
psPos = psPos->psNext)
{
if (psPos->eType != CXT_Element)
continue;
const char *pszSubElement = BareGMLElement(psPos->pszValue);
if (EQUAL(pszSubElement, "pointProperty"))
{
for (const CPLXMLNode *psPointPropertyIter = psPos->psChild;
psPointPropertyIter != nullptr;
psPointPropertyIter = psPointPropertyIter->psNext)
{
if (psPointPropertyIter->eType != CXT_Element)
continue;
const char *pszBareElement =
BareGMLElement(psPointPropertyIter->pszValue);
if (EQUAL(pszBareElement, "Point") ||
EQUAL(pszBareElement, "ElevatedPoint"))
{
OGRPoint oPoint;
if (ParseGMLCoordinates(psPointPropertyIter, &oPoint,
nSRSDimension))
{
const bool bSuccess = AddPoint(
poGeometry, oPoint.getX(), oPoint.getY(),
oPoint.getZ(), oPoint.getCoordinateDimension());
if (bSuccess)
bHasFoundPosElement = true;
else
return false;
}
}
}
if (psPos->psChild && psPos->psChild->eType == CXT_Attribute &&
psPos->psChild->psNext == nullptr &&
strcmp(psPos->psChild->pszValue, "xlink:href") == 0)
{
CPLError(CE_Warning, CPLE_AppDefined,
"Cannot resolve xlink:href='%s'. "
"Try setting GML_SKIP_RESOLVE_ELEMS=NONE",
psPos->psChild->psChild->pszValue);
}
continue;
}
if (!EQUAL(pszSubElement, "pos"))
continue;
const char *pszPos = GetElementText(psPos);
if (pszPos == nullptr)
{
poGeometry->empty();
return true;
}
const char *pszCur = pszPos;
const char *pszX = GMLGetCoordTokenPos(pszCur, &pszCur);
const char *pszY = (pszCur[0] != '\0')
? GMLGetCoordTokenPos(pszCur, &pszCur)
: nullptr;
const char *pszZ = (pszCur[0] != '\0')
? GMLGetCoordTokenPos(pszCur, &pszCur)
: nullptr;
if (pszY == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Did not get 2+ values in <gml:pos>%s</gml:pos> tuple.",
pszPos);
return false;
}
const double dfX = OGRFastAtof(pszX);
const double dfY = OGRFastAtof(pszY);
const double dfZ = (pszZ != nullptr) ? OGRFastAtof(pszZ) : 0.0;
const bool bSuccess =
AddPoint(poGeometry, dfX, dfY, dfZ, (pszZ != nullptr) ? 3 : 2);
if (bSuccess)
bHasFoundPosElement = true;
else
return false;
}
if (bHasFoundPosElement)
return true;
/* -------------------------------------------------------------------- */
/* Is this a "posList"? GML 3 construct (SF profile). */
/* -------------------------------------------------------------------- */
const CPLXMLNode *psPosList = FindBareXMLChild(psGeomNode, "posList");
if (psPosList != nullptr)
{
int nDimension = 2;
// Try to detect the presence of an srsDimension attribute
// This attribute is only available for gml3.1.1 but not
// available for gml3.1 SF.
const char *pszSRSDimension =
CPLGetXMLValue(psPosList, "srsDimension", nullptr);
// If not found at the posList level, try on the enclosing element.
if (pszSRSDimension == nullptr)
pszSRSDimension =
CPLGetXMLValue(psGeomNode, "srsDimension", nullptr);
if (pszSRSDimension != nullptr)
nDimension = atoi(pszSRSDimension);
else if (nSRSDimension != 0)
// Or use one coming from a still higher level element (#5606).
nDimension = nSRSDimension;
if (nDimension != 2 && nDimension != 3)
{
CPLError(CE_Failure, CPLE_AppDefined,
"srsDimension = %d not supported", nDimension);
return false;
}
const char *pszPosList = GetElementText(psPosList);
if (pszPosList == nullptr)
{
poGeometry->empty();
return true;
}
bool bSuccess = false;
const char *pszCur = pszPosList;
while (true)
{
const char *pszX = GMLGetCoordTokenPos(pszCur, &pszCur);
if (pszX == nullptr && bSuccess)
break;
const char *pszY = (pszCur[0] != '\0')
? GMLGetCoordTokenPos(pszCur, &pszCur)
: nullptr;
const char *pszZ = (nDimension == 3 && pszCur[0] != '\0')
? GMLGetCoordTokenPos(pszCur, &pszCur)
: nullptr;
if (pszY == nullptr || (nDimension == 3 && pszZ == nullptr))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Did not get at least %d values or invalid number of "
"set of coordinates <gml:posList>%s</gml:posList>",
nDimension, pszPosList);
return false;
}
double dfX = OGRFastAtof(pszX);
double dfY = OGRFastAtof(pszY);
double dfZ = (pszZ != nullptr) ? OGRFastAtof(pszZ) : 0.0;
bSuccess = AddPoint(poGeometry, dfX, dfY, dfZ, nDimension);
if (!bSuccess || pszCur == nullptr)
break;
}
return bSuccess;
}
/* -------------------------------------------------------------------- */
/* Handle form with a list of <coord> items each with an <X>, */
/* and <Y> element. */
/* -------------------------------------------------------------------- */
int iCoord = 0;
for (const CPLXMLNode *psCoordNode = psGeomNode->psChild;
psCoordNode != nullptr; psCoordNode = psCoordNode->psNext)
{
if (psCoordNode->eType != CXT_Element ||
!EQUAL(BareGMLElement(psCoordNode->pszValue), "coord"))
continue;
const CPLXMLNode *psXNode = FindBareXMLChild(psCoordNode, "X");
const CPLXMLNode *psYNode = FindBareXMLChild(psCoordNode, "Y");
const CPLXMLNode *psZNode = FindBareXMLChild(psCoordNode, "Z");
if (psXNode == nullptr || psYNode == nullptr ||
GetElementText(psXNode) == nullptr ||
GetElementText(psYNode) == nullptr ||
(psZNode != nullptr && GetElementText(psZNode) == nullptr))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Corrupt <coord> element, missing <X> or <Y> element?");
return false;
}
double dfX = OGRFastAtof(GetElementText(psXNode));
double dfY = OGRFastAtof(GetElementText(psYNode));
int nDimension = 2;
double dfZ = 0.0;
if (psZNode != nullptr && GetElementText(psZNode) != nullptr)
{
dfZ = OGRFastAtof(GetElementText(psZNode));
nDimension = 3;
}
if (!AddPoint(poGeometry, dfX, dfY, dfZ, nDimension))
return false;
iCoord++;
}
return iCoord > 0;
}
#ifdef HAVE_GEOS
/************************************************************************/
/* GML2FaceExtRing() */
/* */
/* Identifies the "good" Polygon within the collection returned */
/* by GEOSPolygonize() */
/* short rationale: GEOSPolygonize() will possibly return a */
/* collection of many Polygons; only one is the "good" one, */
/* (including both exterior- and interior-rings) */
/* any other simply represents a single "hole", and should be */
/* consequently ignored at all. */
/************************************************************************/
static std::unique_ptr<OGRPolygon> GML2FaceExtRing(const OGRGeometry *poGeom)
{
const OGRGeometryCollection *poColl =
dynamic_cast<const OGRGeometryCollection *>(poGeom);
if (poColl == nullptr)
{
CPLError(CE_Fatal, CPLE_AppDefined,
"dynamic_cast failed. Expected OGRGeometryCollection.");
return nullptr;
}
const OGRPolygon *poPolygonExterior = nullptr;
const OGRPolygon *poPolygonInterior = nullptr;
int iExterior = 0;
int iInterior = 0;
for (const auto *poChild : *poColl)
{
// A collection of Polygons is expected to be found.
if (wkbFlatten(poChild->getGeometryType()) == wkbPolygon)
{
const OGRPolygon *poPoly = poChild->toPolygon();
if (poPoly->getNumInteriorRings() > 0)
{
poPolygonExterior = poPoly;
iExterior++;
}
else
{
poPolygonInterior = poPoly;
iInterior++;
}
}
else
{
return nullptr;
}
}
if (poPolygonInterior && iExterior == 0 && iInterior == 1)
{
// There is a single Polygon within the collection.
return std::unique_ptr<OGRPolygon>(poPolygonInterior->clone());
}
else if (poPolygonExterior && iExterior == 1 &&
iInterior == poColl->getNumGeometries() - 1)
{
// Return the unique Polygon containing holes.
return std::unique_ptr<OGRPolygon>(poPolygonExterior->clone());
}
return nullptr;
}
#endif
/************************************************************************/
/* GML2OGRGeometry_AddToCompositeCurve() */
/************************************************************************/
static bool
GML2OGRGeometry_AddToCompositeCurve(OGRCompoundCurve *poCC,
std::unique_ptr<OGRGeometry> poGeom,
bool &bChildrenAreAllLineString)
{
if (poGeom == nullptr || !OGR_GT_IsCurve(poGeom->getGeometryType()))
{
CPLError(CE_Failure, CPLE_AppDefined,
"CompositeCurve: Got %.500s geometry as Member instead of a "
"curve.",
poGeom ? poGeom->getGeometryName() : "NULL");
return false;
}
// Crazy but allowed by GML: composite in composite.
if (wkbFlatten(poGeom->getGeometryType()) == wkbCompoundCurve)
{
auto poCCChild = std::unique_ptr<OGRCompoundCurve>(
poGeom.release()->toCompoundCurve());
while (poCCChild->getNumCurves() != 0)
{
auto poCurve = std::unique_ptr<OGRCurve>(poCCChild->stealCurve(0));
if (wkbFlatten(poCurve->getGeometryType()) != wkbLineString)
bChildrenAreAllLineString = false;
if (poCC->addCurve(std::move(poCurve)) != OGRERR_NONE)
{
return false;
}
}
}
else
{
if (wkbFlatten(poGeom->getGeometryType()) != wkbLineString)
bChildrenAreAllLineString = false;
auto poCurve = std::unique_ptr<OGRCurve>(poGeom.release()->toCurve());
if (poCC->addCurve(std::move(poCurve)) != OGRERR_NONE)
{
return false;
}
}
return true;
}
/************************************************************************/
/* GML2OGRGeometry_AddToMultiSurface() */
/************************************************************************/
static bool GML2OGRGeometry_AddToMultiSurface(
OGRMultiSurface *poMS, std::unique_ptr<OGRGeometry> poGeom,
const char *pszMemberElement, bool &bChildrenAreAllPolygons)
{
if (poGeom == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "Invalid %s", pszMemberElement);
return false;
}
OGRwkbGeometryType eType = wkbFlatten(poGeom->getGeometryType());
if (eType == wkbPolygon || eType == wkbCurvePolygon)
{
if (eType != wkbPolygon)
bChildrenAreAllPolygons = false;
if (poMS->addGeometry(std::move(poGeom)) != OGRERR_NONE)
{
return false;
}
}
else if (eType == wkbMultiPolygon || eType == wkbMultiSurface)
{
OGRMultiSurface *poMS2 = poGeom->toMultiSurface();
for (int i = 0; i < poMS2->getNumGeometries(); i++)
{
if (wkbFlatten(poMS2->getGeometryRef(i)->getGeometryType()) !=
wkbPolygon)
bChildrenAreAllPolygons = false;
if (poMS->addGeometry(poMS2->getGeometryRef(i)) != OGRERR_NONE)
{
return false;
}
}
}
else
{
CPLError(CE_Failure, CPLE_AppDefined, "Got %.500s geometry as %s.",
poGeom->getGeometryName(), pszMemberElement);
return false;
}
return true;
}
/************************************************************************/
/* GetDistanceInMetre() */
/************************************************************************/
static double GetDistanceInMetre(double dfDistance, const char *pszUnits)
{
if (EQUAL(pszUnits, "m"))
return dfDistance;
if (EQUAL(pszUnits, "km"))
return dfDistance * 1000;
if (EQUAL(pszUnits, "nm") || EQUAL(pszUnits, "[nmi_i]"))
return dfDistance * CPLAtof(SRS_UL_INTL_NAUT_MILE_CONV);
if (EQUAL(pszUnits, "mi"))
return dfDistance * CPLAtof(SRS_UL_INTL_STAT_MILE_CONV);
if (EQUAL(pszUnits, "ft"))
return dfDistance * CPLAtof(SRS_UL_INTL_FOOT_CONV);
CPLDebug("GML2OGRGeometry", "Unhandled unit: %s", pszUnits);
return -1;
}
/************************************************************************/
/* GetSemiMajor() */
/************************************************************************/
static double GetSemiMajor(const OGRSpatialReference *poSRS)
{
double dfSemiMajor = poSRS->GetSemiMajor();
// Standardize on OGR_GREATCIRCLE_DEFAULT_RADIUS for Earth ellipsoids.
if (std::fabs(dfSemiMajor - OGR_GREATCIRCLE_DEFAULT_RADIUS) <
0.05 * OGR_GREATCIRCLE_DEFAULT_RADIUS)
dfSemiMajor = OGR_GREATCIRCLE_DEFAULT_RADIUS;
return dfSemiMajor;
}
/************************************************************************/
/* GML2OGRGeometry_XMLNode() */
/* */
/* Translates the passed XMLnode and its children into an */
/* OGRGeometry. This is used recursively for geometry */
/* collections. */
/************************************************************************/
static std::unique_ptr<OGRGeometry> GML2OGRGeometry_XMLNode_Internal(
const CPLXMLNode *psNode, int nPseudoBoolGetSecondaryGeometryOption,
int nRecLevel, int nSRSDimension, const char *pszSRSName,
bool bIgnoreGSG = false, bool bOrientation = true,
bool bFaceHoleNegative = false);
OGRGeometry *GML2OGRGeometry_XMLNode(const CPLXMLNode *psNode,
int nPseudoBoolGetSecondaryGeometryOption,
int nRecLevel, int nSRSDimension,
bool bIgnoreGSG, bool bOrientation,
bool bFaceHoleNegative)
{
return GML2OGRGeometry_XMLNode_Internal(
psNode, nPseudoBoolGetSecondaryGeometryOption, nRecLevel,
nSRSDimension, nullptr, bIgnoreGSG, bOrientation,
bFaceHoleNegative)
.release();
}
static std::unique_ptr<OGRGeometry> GML2OGRGeometry_XMLNode_Internal(
const CPLXMLNode *psNode, int nPseudoBoolGetSecondaryGeometryOption,
int nRecLevel, int nSRSDimension, const char *pszSRSName, bool bIgnoreGSG,
bool bOrientation, bool bFaceHoleNegative)
{
// constexpr bool bCastToLinearTypeIfPossible = true; // Hard-coded for
// now.
// We need this nRecLevel == 0 check, otherwise this could result in
// multiple revist of the same node, and exponential complexity.
if (nRecLevel == 0 && psNode != nullptr &&
strcmp(psNode->pszValue, "?xml") == 0)
psNode = psNode->psNext;
while (psNode != nullptr && psNode->eType == CXT_Comment)
psNode = psNode->psNext;
if (psNode == nullptr)
return nullptr;
const char *pszSRSDimension =
CPLGetXMLValue(psNode, "srsDimension", nullptr);
if (pszSRSDimension != nullptr)
nSRSDimension = atoi(pszSRSDimension);
if (pszSRSName == nullptr)
pszSRSName = CPLGetXMLValue(psNode, "srsName", nullptr);
const char *pszBaseGeometry = BareGMLElement(psNode->pszValue);
if (nPseudoBoolGetSecondaryGeometryOption < 0)
nPseudoBoolGetSecondaryGeometryOption =
CPLTestBool(CPLGetConfigOption("GML_GET_SECONDARY_GEOM", "NO"));
bool bGetSecondaryGeometry =
bIgnoreGSG ? false : CPL_TO_BOOL(nPseudoBoolGetSecondaryGeometryOption);
// Arbitrary value, but certainly large enough for reasonable usages.
if (nRecLevel == 32)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Too many recursion levels (%d) while parsing GML geometry.",
nRecLevel);
return nullptr;
}
if (bGetSecondaryGeometry)
if (!(EQUAL(pszBaseGeometry, "directedEdge") ||
EQUAL(pszBaseGeometry, "TopoCurve")))
return nullptr;
/* -------------------------------------------------------------------- */
/* Polygon / PolygonPatch / Rectangle */
/* -------------------------------------------------------------------- */
if (EQUAL(pszBaseGeometry, "Polygon") ||
EQUAL(pszBaseGeometry, "PolygonPatch") ||
EQUAL(pszBaseGeometry, "Rectangle"))
{
// Find outer ring.
const CPLXMLNode *psChild = FindBareXMLChild(psNode, "outerBoundaryIs");
if (psChild == nullptr)
psChild = FindBareXMLChild(psNode, "exterior");
psChild = GetChildElement(psChild);
if (psChild == nullptr)
{
// <gml:Polygon/> is invalid GML2, but valid GML3, so be tolerant.
return std::make_unique<OGRPolygon>();
}
// Translate outer ring and add to polygon.
auto poGeom = GML2OGRGeometry_XMLNode_Internal(
psChild, nPseudoBoolGetSecondaryGeometryOption, nRecLevel + 1,
nSRSDimension, pszSRSName);
if (poGeom == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "Invalid exterior ring");
return nullptr;
}
if (!OGR_GT_IsCurve(poGeom->getGeometryType()))
{
CPLError(CE_Failure, CPLE_AppDefined,
"%s: Got %.500s geometry as outerBoundaryIs.",
pszBaseGeometry, poGeom->getGeometryName());
return nullptr;
}
if (wkbFlatten(poGeom->getGeometryType()) == wkbLineString &&
!EQUAL(poGeom->getGeometryName(), "LINEARRING"))
{
OGRCurve *poCurve = poGeom.release()->toCurve();
auto poLinearRing = OGRCurve::CastToLinearRing(poCurve);
if (!poLinearRing)
return nullptr;
poGeom.reset(poLinearRing);
}
std::unique_ptr<OGRCurvePolygon> poCP;
bool bIsPolygon = false;
assert(poGeom); // to please cppcheck
if (EQUAL(poGeom->getGeometryName(), "LINEARRING"))
{
poCP = std::make_unique<OGRPolygon>();
bIsPolygon = true;
}
else
{
poCP = std::make_unique<OGRCurvePolygon>();
bIsPolygon = false;
}
{
auto poCurve =
std::unique_ptr<OGRCurve>(poGeom.release()->toCurve());
if (poCP->addRing(std::move(poCurve)) != OGRERR_NONE)
{
return nullptr;
}
}
// Find all inner rings
for (psChild = psNode->psChild; psChild != nullptr;
psChild = psChild->psNext)
{