/usr/include/geos_c.h is in libgeos-dev 3.5.0-1ubuntu2.
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*
*
* C-Wrapper for GEOS library
*
* Copyright (C) 2010 2011 Sandro Santilli <strk@keybit.net>
* Copyright (C) 2005 Refractions Research Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
* Author: Sandro Santilli <strk@keybit.net>
*
***********************************************************************
*
* GENERAL NOTES:
*
* - Remember to call initGEOS() before any use of this library's
* functions, and call finishGEOS() when done.
*
* - Currently you have to explicitly GEOSGeom_destroy() all
* GEOSGeom objects to avoid memory leaks, and to GEOSFree()
* all returned char * (unless const).
*
* - Functions ending with _r are thread safe; see details in RFC 3
* http://trac.osgeo.org/geos/wiki/RFC3.
* To avoid using by accident non _r functions,
* define GEOS_USE_ONLY_R_API before including geos_c.h
*
***********************************************************************/
#ifndef GEOS_C_H_INCLUDED
#define GEOS_C_H_INCLUDED
#ifndef __cplusplus
# include <stddef.h> /* for size_t definition */
#else
# include <cstddef>
using std::size_t;
#endif
#ifdef __cplusplus
extern "C" {
#endif
/************************************************************************
*
* Version
*
***********************************************************************/
/*
* Following 'ifdef' hack fixes problem with generating geos_c.h on Windows,
* when building with Visual C++ compiler.
*
*/
#if defined(_MSC_VER)
#include <geos/version.h>
#define GEOS_CAPI_VERSION_MAJOR 1
#define GEOS_CAPI_VERSION_MINOR 9
#define GEOS_CAPI_VERSION_PATCH 0
#define GEOS_CAPI_VERSION "3.5.0-CAPI-1.9.0"
#else
#ifndef GEOS_VERSION_MAJOR
#define GEOS_VERSION_MAJOR 3
#endif
#ifndef GEOS_VERSION_MINOR
#define GEOS_VERSION_MINOR 5
#endif
#ifndef GEOS_VERSION_PATCH
#define GEOS_VERSION_PATCH 0
#endif
#ifndef GEOS_VERSION
#define GEOS_VERSION "3.5.0"
#endif
#ifndef GEOS_JTS_PORT
#define GEOS_JTS_PORT "1.13.0"
#endif
#define GEOS_CAPI_VERSION_MAJOR 1
#define GEOS_CAPI_VERSION_MINOR 9
#define GEOS_CAPI_VERSION_PATCH 0
#define GEOS_CAPI_VERSION "3.5.0-CAPI-1.9.0"
#endif
#define GEOS_CAPI_FIRST_INTERFACE GEOS_CAPI_VERSION_MAJOR
#define GEOS_CAPI_LAST_INTERFACE (GEOS_CAPI_VERSION_MAJOR+GEOS_CAPI_VERSION_MINOR)
/************************************************************************
*
* (Abstract) type definitions
*
************************************************************************/
typedef struct GEOSContextHandle_HS *GEOSContextHandle_t;
typedef void (*GEOSMessageHandler)(const char *fmt, ...);
/*
* A GEOS message handler function.
*
* @param message the message contents
* @param userdata the user data pointer that was passed to GEOS when registering this message handler.
*
*
* @see GEOSContext_setErrorMessageHandler
* @see GEOSContext_setNoticeMessageHandler
*/
typedef void (*GEOSMessageHandler_r)(const char *message, void *userdata);
/* When we're included by geos_c.cpp, those are #defined to the original
* JTS definitions via preprocessor. We don't touch them to allow the
* compiler to cross-check the declarations. However, for all "normal"
* C-API users, we need to define them as "opaque" struct pointers, as
* those clients don't have access to the original C++ headers, by design.
*/
#ifndef GEOSGeometry
typedef struct GEOSGeom_t GEOSGeometry;
typedef struct GEOSPrepGeom_t GEOSPreparedGeometry;
typedef struct GEOSCoordSeq_t GEOSCoordSequence;
typedef struct GEOSSTRtree_t GEOSSTRtree;
typedef struct GEOSBufParams_t GEOSBufferParams;
#endif
/* Those are compatibility definitions for source compatibility
* with GEOS 2.X clients relying on that type.
*/
typedef GEOSGeometry* GEOSGeom;
typedef GEOSCoordSequence* GEOSCoordSeq;
/* Supported geometry types
* This was renamed from GEOSGeomTypeId in GEOS 2.2.X, which might
* break compatibility, this issue is still under investigation.
*/
enum GEOSGeomTypes {
GEOS_POINT,
GEOS_LINESTRING,
GEOS_LINEARRING,
GEOS_POLYGON,
GEOS_MULTIPOINT,
GEOS_MULTILINESTRING,
GEOS_MULTIPOLYGON,
GEOS_GEOMETRYCOLLECTION
};
/* Byte oders exposed via the c api */
enum GEOSByteOrders {
GEOS_WKB_XDR = 0, /* Big Endian */
GEOS_WKB_NDR = 1 /* Little Endian */
};
typedef void (*GEOSQueryCallback)(void *item, void *userdata);
/************************************************************************
*
* Initialization, cleanup, version
*
***********************************************************************/
#include <geos/export.h>
/*
* Register an interruption checking callback
*
* The callback will be invoked _before_ checking for
* interruption, so can be used to request it.
*/
typedef void (GEOSInterruptCallback)();
extern GEOSInterruptCallback GEOS_DLL *GEOS_interruptRegisterCallback(GEOSInterruptCallback* cb);
/* Request safe interruption of operations */
extern void GEOS_DLL GEOS_interruptRequest();
/* Cancel a pending interruption request */
extern void GEOS_DLL GEOS_interruptCancel();
/*
* @deprecated in 3.5.0
* initialize using GEOS_init_r() and set the message handlers using
* GEOSContext_setNoticeHandler_r and/or GEOSContext_setErrorHandler_r
*/
extern GEOSContextHandle_t GEOS_DLL initGEOS_r(
GEOSMessageHandler notice_function,
GEOSMessageHandler error_function);
/*
* @deprecated in 3.5.0 replaced by GEOS_finish_r.
*/
extern void GEOS_DLL finishGEOS_r(GEOSContextHandle_t handle);
extern GEOSContextHandle_t GEOS_DLL GEOS_init_r();
extern void GEOS_DLL GEOS_finish_r(GEOSContextHandle_t handle);
extern GEOSMessageHandler GEOS_DLL GEOSContext_setNoticeHandler_r(GEOSContextHandle_t extHandle,
GEOSMessageHandler nf);
extern GEOSMessageHandler GEOS_DLL GEOSContext_setErrorHandler_r(GEOSContextHandle_t extHandle,
GEOSMessageHandler ef);
/*
* Sets a notice message handler on the given GEOS context.
*
* @param extHandle the GEOS context
* @param nf the message handler
* @param userData optional user data pointer that will be passed to the message handler
*
* @return the previously configured message handler or NULL if no message handler was configured
*/
extern GEOSMessageHandler_r GEOS_DLL GEOSContext_setNoticeMessageHandler_r(GEOSContextHandle_t extHandle,
GEOSMessageHandler_r nf,
void *userData);
/*
* Sets an error message handler on the given GEOS context.
*
* @param extHandle the GEOS context
* @param ef the message handler
* @param userData optional user data pointer that will be passed to the message handler
*
* @return the previously configured message handler or NULL if no message handler was configured
*/
extern GEOSMessageHandler_r GEOS_DLL GEOSContext_setErrorMessageHandler_r(GEOSContextHandle_t extHandle,
GEOSMessageHandler_r ef,
void *userData);
extern const char GEOS_DLL *GEOSversion();
/************************************************************************
*
* NOTE - These functions are DEPRECATED. Please use the new Reader and
* writer APIS!
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKT_r(GEOSContextHandle_t handle,
const char *wkt);
extern char GEOS_DLL *GEOSGeomToWKT_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Specify whether output WKB should be 2d or 3d.
* Return previously set number of dimensions.
*/
extern int GEOS_DLL GEOS_getWKBOutputDims_r(GEOSContextHandle_t handle);
extern int GEOS_DLL GEOS_setWKBOutputDims_r(GEOSContextHandle_t handle,
int newDims);
/*
* Specify whether the WKB byte order is big or little endian.
* The return value is the previous byte order.
*/
extern int GEOS_DLL GEOS_getWKBByteOrder_r(GEOSContextHandle_t handle);
extern int GEOS_DLL GEOS_setWKBByteOrder_r(GEOSContextHandle_t handle,
int byteOrder);
extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKB_buf_r(GEOSContextHandle_t handle,
const unsigned char *wkb,
size_t size);
extern unsigned char GEOS_DLL *GEOSGeomToWKB_buf_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
size_t *size);
extern GEOSGeometry GEOS_DLL *GEOSGeomFromHEX_buf_r(GEOSContextHandle_t handle,
const unsigned char *hex,
size_t size);
extern unsigned char GEOS_DLL *GEOSGeomToHEX_buf_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
size_t *size);
/************************************************************************
*
* Coordinate Sequence functions
*
***********************************************************************/
/*
* Create a Coordinate sequence with ``size'' coordinates
* of ``dims'' dimensions.
* Return NULL on exception.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_create_r(
GEOSContextHandle_t handle,
unsigned int size,
unsigned int dims);
/*
* Clone a Coordinate Sequence.
* Return NULL on exception.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_clone_r(
GEOSContextHandle_t handle,
const GEOSCoordSequence* s);
/*
* Destroy a Coordinate Sequence.
*/
extern void GEOS_DLL GEOSCoordSeq_destroy_r(GEOSContextHandle_t handle,
GEOSCoordSequence* s);
/*
* Set ordinate values in a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_setX_r(GEOSContextHandle_t handle,
GEOSCoordSequence* s, unsigned int idx,
double val);
extern int GEOS_DLL GEOSCoordSeq_setY_r(GEOSContextHandle_t handle,
GEOSCoordSequence* s, unsigned int idx,
double val);
extern int GEOS_DLL GEOSCoordSeq_setZ_r(GEOSContextHandle_t handle,
GEOSCoordSequence* s, unsigned int idx,
double val);
extern int GEOS_DLL GEOSCoordSeq_setOrdinate_r(GEOSContextHandle_t handle,
GEOSCoordSequence* s,
unsigned int idx,
unsigned int dim, double val);
/*
* Get ordinate values from a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_getX_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getY_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getZ_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getOrdinate_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int idx,
unsigned int dim, double *val);
/*
* Get size and dimensions info from a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_getSize_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int *size);
extern int GEOS_DLL GEOSCoordSeq_getDimensions_r(GEOSContextHandle_t handle,
const GEOSCoordSequence* s,
unsigned int *dims);
/************************************************************************
*
* Linear referencing functions -- there are more, but these are
* probably sufficient for most purposes
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
/* Return distance of point 'p' projected on 'g' from origin
* of 'g'. Geometry 'g' must be a lineal geometry */
extern double GEOS_DLL GEOSProject_r(GEOSContextHandle_t handle,
const GEOSGeometry *g,
const GEOSGeometry *p);
/* Return closest point to given distance within geometry
* Geometry must be a LineString */
extern GEOSGeometry GEOS_DLL *GEOSInterpolate_r(GEOSContextHandle_t handle,
const GEOSGeometry *g,
double d);
extern double GEOS_DLL GEOSProjectNormalized_r(GEOSContextHandle_t handle,
const GEOSGeometry *g,
const GEOSGeometry *p);
extern GEOSGeometry GEOS_DLL *GEOSInterpolateNormalized_r(
GEOSContextHandle_t handle,
const GEOSGeometry *g,
double d);
/************************************************************************
*
* Buffer related functions
*
***********************************************************************/
/* @return NULL on exception */
extern GEOSGeometry GEOS_DLL *GEOSBuffer_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
double width, int quadsegs);
enum GEOSBufCapStyles {
GEOSBUF_CAP_ROUND=1,
GEOSBUF_CAP_FLAT=2,
GEOSBUF_CAP_SQUARE=3
};
enum GEOSBufJoinStyles {
GEOSBUF_JOIN_ROUND=1,
GEOSBUF_JOIN_MITRE=2,
GEOSBUF_JOIN_BEVEL=3
};
/* @return 0 on exception */
extern GEOSBufferParams GEOS_DLL *GEOSBufferParams_create_r(
GEOSContextHandle_t handle);
extern void GEOS_DLL GEOSBufferParams_destroy_r(
GEOSContextHandle_t handle,
GEOSBufferParams* parms);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setEndCapStyle_r(
GEOSContextHandle_t handle,
GEOSBufferParams* p,
int style);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setJoinStyle_r(
GEOSContextHandle_t handle,
GEOSBufferParams* p,
int joinStyle);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setMitreLimit_r(
GEOSContextHandle_t handle,
GEOSBufferParams* p,
double mitreLimit);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setQuadrantSegments_r(
GEOSContextHandle_t handle,
GEOSBufferParams* p,
int quadSegs);
/* @param singleSided: 1 for single sided, 0 otherwise */
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setSingleSided_r(
GEOSContextHandle_t handle,
GEOSBufferParams* p,
int singleSided);
/* @return NULL on exception */
extern GEOSGeometry GEOS_DLL *GEOSBufferWithParams_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g,
const GEOSBufferParams* p,
double width);
/* These functions return NULL on exception. */
extern GEOSGeometry GEOS_DLL *GEOSBufferWithStyle_r(GEOSContextHandle_t handle,
const GEOSGeometry* g, double width, int quadsegs, int endCapStyle,
int joinStyle, double mitreLimit);
/* These functions return NULL on exception. Only LINESTRINGs are accepted. */
/* @deprecated in 3.3.0: use GEOSOffsetCurve instead */
extern GEOSGeometry GEOS_DLL *GEOSSingleSidedBuffer_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g, double width, int quadsegs,
int joinStyle, double mitreLimit, int leftSide);
/*
* Only LINESTRINGs are accepted.
* @param width : offset distance.
* negative for right side offset.
* positive for left side offset.
* @return NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSOffsetCurve_r(GEOSContextHandle_t handle,
const GEOSGeometry* g, double width, int quadsegs,
int joinStyle, double mitreLimit);
/************************************************************************
*
* Geometry Constructors.
* GEOSCoordSequence* arguments will become ownership of the returned object.
* All functions return NULL on exception.
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSGeom_createPoint_r(
GEOSContextHandle_t handle,
GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPoint_r(
GEOSContextHandle_t handle);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createLinearRing_r(
GEOSContextHandle_t handle,
GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createLineString_r(
GEOSContextHandle_t handle,
GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyLineString_r(
GEOSContextHandle_t handle);
/*
* Second argument is an array of GEOSGeometry* objects.
* The caller remains owner of the array, but pointed-to
* objects become ownership of the returned GEOSGeometry.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPolygon_r(
GEOSContextHandle_t handle);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createPolygon_r(
GEOSContextHandle_t handle,
GEOSGeometry* shell,
GEOSGeometry** holes,
unsigned int nholes);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createCollection_r(
GEOSContextHandle_t handle, int type,
GEOSGeometry* *geoms,
unsigned int ngeoms);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyCollection_r(
GEOSContextHandle_t handle, int type);
extern GEOSGeometry GEOS_DLL *GEOSGeom_clone_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/************************************************************************
*
* Memory management
*
***********************************************************************/
extern void GEOS_DLL GEOSGeom_destroy_r(GEOSContextHandle_t handle,
GEOSGeometry* g);
/************************************************************************
*
* Topology operations - return NULL on exception.
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSEnvelope_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSIntersection_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSConvexHull_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSDifference_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSSymDifference_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSBoundary_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSUnion_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSUnaryUnion_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* @deprecated in 3.3.0: use GEOSUnaryUnion_r instead */
extern GEOSGeometry GEOS_DLL *GEOSUnionCascaded_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSPointOnSurface_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSGetCentroid_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSNode_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Fast, non-robust intersection between an arbitrary geometry and
* a rectangle. The returned geometry may be invalid. */
extern GEOSGeometry GEOS_DLL *GEOSClipByRect_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
double xmin, double ymin,
double xmax, double ymax);
/*
* all arguments remain ownership of the caller
* (both Geometries and pointers)
*/
/*
* Polygonizes a set of Geometries which contain linework that
* represents the edges of a planar graph.
*
* Any dimension of Geometry is handled - the constituent linework
* is extracted to form the edges.
*
* The edges must be correctly noded; that is, they must only meet
* at their endpoints.
* The Polygonizer will still run on incorrectly noded input
* but will not form polygons from incorrectly noded edges.
*
* The Polygonizer reports the follow kinds of errors:
*
* - Dangles - edges which have one or both ends which are
* not incident on another edge endpoint
* - Cut Edges - edges which are connected at both ends but
* which do not form part of polygon
* - Invalid Ring Lines - edges which form rings which are invalid
* (e.g. the component lines contain a self-intersection)
*
* Errors are reported to output parameters "cuts", "dangles" and
* "invalid" (if not-null). Formed polygons are returned as a
* collection. NULL is returned on exception. All returned
* geometries must be destroyed by caller.
*
*/
extern GEOSGeometry GEOS_DLL *GEOSPolygonize_r(GEOSContextHandle_t handle,
const GEOSGeometry *const geoms[],
unsigned int ngeoms);
extern GEOSGeometry GEOS_DLL *GEOSPolygonizer_getCutEdges_r(
GEOSContextHandle_t handle,
const GEOSGeometry * const geoms[],
unsigned int ngeoms);
extern GEOSGeometry GEOS_DLL *GEOSPolygonize_full_r(GEOSContextHandle_t handle,
const GEOSGeometry* input, GEOSGeometry** cuts,
GEOSGeometry** dangles, GEOSGeometry** invalidRings);
extern GEOSGeometry GEOS_DLL *GEOSLineMerge_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSSimplify_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
double tolerance);
extern GEOSGeometry GEOS_DLL *GEOSTopologyPreserveSimplify_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g, double tolerance);
/*
* Return all distinct vertices of input geometry as a MULTIPOINT.
* Note that only 2 dimensions of the vertices are considered when
* testing for equality.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeom_extractUniquePoints_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Find paths shared between the two given lineal geometries.
*
* Returns a GEOMETRYCOLLECTION having two elements:
* - first element is a MULTILINESTRING containing shared paths
* having the _same_ direction on both inputs
* - second element is a MULTILINESTRING containing shared paths
* having the _opposite_ direction on the two inputs
*
* Returns NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSSharedPaths_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1, const GEOSGeometry* g2);
/*
* Snap first geometry on to second with given tolerance
* Returns a newly allocated geometry, or NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSSnap_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1, const GEOSGeometry* g2, double tolerance);
/*
* Return a Delaunay triangulation of the vertex of the given geometry
*
* @param g the input geometry whose vertex will be used as "sites"
* @param tolerance optional snapping tolerance to use for improved robustness
* @param onlyEdges if non-zero will return a MULTILINESTRING, otherwise it will
* return a GEOMETRYCOLLECTION containing triangular POLYGONs.
*
* @return a newly allocated geometry, or NULL on exception
*/
extern GEOSGeometry GEOS_DLL * GEOSDelaunayTriangulation_r(
GEOSContextHandle_t handle,
const GEOSGeometry *g,
double tolerance,
int onlyEdges);
/*
* Returns the Voronoi polygons of a set of Vertices given as input
*
* @param g the input geometry whose vertex will be used as sites.
* @param tolerance snapping tolerance to use for improved robustness
* @param onlyEdges whether to return only edges of the voronoi cells
* @param env clipping envelope for the returned diagram, automatically
* determined if NULL.
* The diagram will be clipped to the larger
* of this envelope or an envelope surrounding the sites.
*
* @return a newly allocated geometry, or NULL on exception.
*/
extern GEOSGeometry GEOS_DLL * GEOSVoronoiDiagram_r(
GEOSContextHandle_t extHandle,
const GEOSGeometry *g,
const GEOSGeometry *env,
double tolerance,
int onlyEdges);
/************************************************************************
*
* Binary predicates - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
extern char GEOS_DLL GEOSDisjoint_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSTouches_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSIntersects_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSCrosses_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSWithin_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSContains_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSOverlaps_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSEquals_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSEqualsExact_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2,
double tolerance);
extern char GEOS_DLL GEOSCovers_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSCoveredBy_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
/************************************************************************
*
* Prepared Geometry Binary predicates - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
extern const GEOSPreparedGeometry GEOS_DLL *GEOSPrepare_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern void GEOS_DLL GEOSPreparedGeom_destroy_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* g);
extern char GEOS_DLL GEOSPreparedContains_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedContainsProperly_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCoveredBy_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCovers_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCrosses_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedDisjoint_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedIntersects_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedOverlaps_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedTouches_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedWithin_r(GEOSContextHandle_t handle,
const GEOSPreparedGeometry* pg1,
const GEOSGeometry* g2);
/************************************************************************
*
* STRtree functions
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
extern GEOSSTRtree GEOS_DLL *GEOSSTRtree_create_r(
GEOSContextHandle_t handle,
size_t nodeCapacity);
extern void GEOS_DLL GEOSSTRtree_insert_r(GEOSContextHandle_t handle,
GEOSSTRtree *tree,
const GEOSGeometry *g,
void *item);
extern void GEOS_DLL GEOSSTRtree_query_r(GEOSContextHandle_t handle,
GEOSSTRtree *tree,
const GEOSGeometry *g,
GEOSQueryCallback callback,
void *userdata);
extern void GEOS_DLL GEOSSTRtree_iterate_r(GEOSContextHandle_t handle,
GEOSSTRtree *tree,
GEOSQueryCallback callback,
void *userdata);
extern char GEOS_DLL GEOSSTRtree_remove_r(GEOSContextHandle_t handle,
GEOSSTRtree *tree,
const GEOSGeometry *g,
void *item);
extern void GEOS_DLL GEOSSTRtree_destroy_r(GEOSContextHandle_t handle,
GEOSSTRtree *tree);
/************************************************************************
*
* Unary predicate - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
extern char GEOS_DLL GEOSisEmpty_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern char GEOS_DLL GEOSisSimple_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern char GEOS_DLL GEOSisRing_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern char GEOS_DLL GEOSHasZ_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern char GEOS_DLL GEOSisClosed_r(GEOSContextHandle_t handle,
const GEOSGeometry *g);
/************************************************************************
*
* Dimensionally Extended 9 Intersection Model related
*
***********************************************************************/
/* These are for use with GEOSRelateBoundaryNodeRule (flags param) */
enum GEOSRelateBoundaryNodeRules {
/* MOD2 and OGC are the same rule, and is the default
* used by GEOSRelatePattern
*/
GEOSRELATE_BNR_MOD2=1,
GEOSRELATE_BNR_OGC=1,
GEOSRELATE_BNR_ENDPOINT=2,
GEOSRELATE_BNR_MULTIVALENT_ENDPOINT=3,
GEOSRELATE_BNR_MONOVALENT_ENDPOINT=4
};
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSRelatePattern_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2,
const char *pat);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSRelate_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2);
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSRelatePatternMatch_r(GEOSContextHandle_t handle,
const char *mat,
const char *pat);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSRelateBoundaryNodeRule_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2,
int bnr);
/************************************************************************
*
* Validity checking
*
***********************************************************************/
/* These are for use with GEOSisValidDetail (flags param) */
enum GEOSValidFlags {
GEOSVALID_ALLOW_SELFTOUCHING_RING_FORMING_HOLE=1
};
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSisValid_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSisValidReason_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Caller has the responsibility to destroy 'reason' (GEOSFree)
* and 'location' (GEOSGeom_destroy) params
* return 2 on exception, 1 when valid, 0 when invalid
*/
extern char GEOS_DLL GEOSisValidDetail_r(GEOSContextHandle_t handle,
const GEOSGeometry* g,
int flags,
char** reason,
GEOSGeometry** location);
/************************************************************************
*
* Geometry info
*
***********************************************************************/
/* Return NULL on exception, result must be freed by caller. */
extern char GEOS_DLL *GEOSGeomType_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGeomTypeId_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Return 0 on exception */
extern int GEOS_DLL GEOSGetSRID_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
extern void GEOS_DLL GEOSSetSRID_r(GEOSContextHandle_t handle,
GEOSGeometry* g, int SRID);
/* May be called on all geometries in GEOS 3.x, returns -1 on error and 1
* for non-multi geometries. Older GEOS versions only accept
* GeometryCollections or Multi* geometries here, and are likely to crash
* when fed simple geometries, so beware if you need compatibility with
* old GEOS versions.
*/
extern int GEOS_DLL GEOSGetNumGeometries_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Return NULL on exception.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
* Up to GEOS 3.2.0 the input geometry must be a Collection, in
* later version it doesn't matter (getGeometryN(0) for a single will
* return the input).
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetGeometryN_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g, int n);
/* Return -1 on exception */
extern int GEOS_DLL GEOSNormalize_r(GEOSContextHandle_t handle,
GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGetNumInteriorRings_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Return -1 on exception, Geometry must be a LineString. */
extern int GEOS_DLL GEOSGeomGetNumPoints_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Return -1 on exception, Geometry must be a Point. */
extern int GEOS_DLL GEOSGeomGetX_r(GEOSContextHandle_t handle, const GEOSGeometry *g, double *x);
extern int GEOS_DLL GEOSGeomGetY_r(GEOSContextHandle_t handle, const GEOSGeometry *g, double *y);
/*
* Return NULL on exception, Geometry must be a Polygon.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetInteriorRingN_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g, int n);
/*
* Return NULL on exception, Geometry must be a Polygon.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetExteriorRing_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGetNumCoordinates_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Return NULL on exception.
* Geometry must be a LineString, LinearRing or Point.
*/
extern const GEOSCoordSequence GEOS_DLL *GEOSGeom_getCoordSeq_r(
GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Return 0 on exception (or empty geometry)
*/
extern int GEOS_DLL GEOSGeom_getDimensions_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Return 2 or 3.
*/
extern int GEOS_DLL GEOSGeom_getCoordinateDimension_r(GEOSContextHandle_t handle,
const GEOSGeometry* g);
/*
* Return NULL on exception.
* Must be LineString and must be freed by called.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeomGetPointN_r(GEOSContextHandle_t handle, const GEOSGeometry *g, int n);
extern GEOSGeometry GEOS_DLL *GEOSGeomGetStartPoint_r(GEOSContextHandle_t handle, const GEOSGeometry *g);
extern GEOSGeometry GEOS_DLL *GEOSGeomGetEndPoint_r(GEOSContextHandle_t handle, const GEOSGeometry *g);
/************************************************************************
*
* Misc functions
*
***********************************************************************/
/* Return 0 on exception, 1 otherwise */
extern int GEOS_DLL GEOSArea_r(GEOSContextHandle_t handle,
const GEOSGeometry* g, double *area);
extern int GEOS_DLL GEOSLength_r(GEOSContextHandle_t handle,
const GEOSGeometry* g, double *length);
extern int GEOS_DLL GEOSDistance_r(GEOSContextHandle_t handle,
const GEOSGeometry* g1,
const GEOSGeometry* g2, double *dist);
extern int GEOS_DLL GEOSHausdorffDistance_r(GEOSContextHandle_t handle,
const GEOSGeometry *g1,
const GEOSGeometry *g2,
double *dist);
extern int GEOS_DLL GEOSHausdorffDistanceDensify_r(GEOSContextHandle_t handle,
const GEOSGeometry *g1,
const GEOSGeometry *g2,
double densifyFrac, double *dist);
extern int GEOS_DLL GEOSGeomGetLength_r(GEOSContextHandle_t handle,
const GEOSGeometry *g, double *length);
/* Return 0 on exception, the closest points of the two geometries otherwise.
* The first point comes from g1 geometry and the second point comes from g2.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSNearestPoints_r(
GEOSContextHandle_t handle, const GEOSGeometry* g1, const GEOSGeometry* g2);
/************************************************************************
*
* Algorithms
*
***********************************************************************/
/* Walking from A to B:
* return -1 if reaching P takes a counter-clockwise (left) turn
* return 1 if reaching P takes a clockwise (right) turn
* return 0 if P is collinear with A-B
*
* On exceptions, return 2.
*
*/
extern int GEOS_DLL GEOSOrientationIndex_r(GEOSContextHandle_t handle,
double Ax, double Ay, double Bx, double By, double Px, double Py);
/************************************************************************
*
* Reader and Writer APIs
*
***********************************************************************/
typedef struct GEOSWKTReader_t GEOSWKTReader;
typedef struct GEOSWKTWriter_t GEOSWKTWriter;
typedef struct GEOSWKBReader_t GEOSWKBReader;
typedef struct GEOSWKBWriter_t GEOSWKBWriter;
/* WKT Reader */
extern GEOSWKTReader GEOS_DLL *GEOSWKTReader_create_r(
GEOSContextHandle_t handle);
extern void GEOS_DLL GEOSWKTReader_destroy_r(GEOSContextHandle_t handle,
GEOSWKTReader* reader);
extern GEOSGeometry GEOS_DLL *GEOSWKTReader_read_r(GEOSContextHandle_t handle,
GEOSWKTReader* reader,
const char *wkt);
/* WKT Writer */
extern GEOSWKTWriter GEOS_DLL *GEOSWKTWriter_create_r(
GEOSContextHandle_t handle);
extern void GEOS_DLL GEOSWKTWriter_destroy_r(GEOSContextHandle_t handle,
GEOSWKTWriter* writer);
extern char GEOS_DLL *GEOSWKTWriter_write_r(GEOSContextHandle_t handle,
GEOSWKTWriter* writer,
const GEOSGeometry* g);
extern void GEOS_DLL GEOSWKTWriter_setTrim_r(GEOSContextHandle_t handle,
GEOSWKTWriter *writer,
char trim);
extern void GEOS_DLL GEOSWKTWriter_setRoundingPrecision_r(GEOSContextHandle_t handle,
GEOSWKTWriter *writer,
int precision);
extern void GEOS_DLL GEOSWKTWriter_setOutputDimension_r(GEOSContextHandle_t handle,
GEOSWKTWriter *writer,
int dim);
extern int GEOS_DLL GEOSWKTWriter_getOutputDimension_r(GEOSContextHandle_t handle,
GEOSWKTWriter *writer);
extern void GEOS_DLL GEOSWKTWriter_setOld3D_r(GEOSContextHandle_t handle,
GEOSWKTWriter *writer,
int useOld3D);
/* WKB Reader */
extern GEOSWKBReader GEOS_DLL *GEOSWKBReader_create_r(
GEOSContextHandle_t handle);
extern void GEOS_DLL GEOSWKBReader_destroy_r(GEOSContextHandle_t handle,
GEOSWKBReader* reader);
extern GEOSGeometry GEOS_DLL *GEOSWKBReader_read_r(GEOSContextHandle_t handle,
GEOSWKBReader* reader,
const unsigned char *wkb,
size_t size);
extern GEOSGeometry GEOS_DLL *GEOSWKBReader_readHEX_r(
GEOSContextHandle_t handle,
GEOSWKBReader* reader,
const unsigned char *hex,
size_t size);
/* WKB Writer */
extern GEOSWKBWriter GEOS_DLL *GEOSWKBWriter_create_r(
GEOSContextHandle_t handle);
extern void GEOS_DLL GEOSWKBWriter_destroy_r(GEOSContextHandle_t handle,
GEOSWKBWriter* writer);
/* The caller owns the results for these two methods! */
extern unsigned char GEOS_DLL *GEOSWKBWriter_write_r(
GEOSContextHandle_t handle,
GEOSWKBWriter* writer,
const GEOSGeometry* g,
size_t *size);
extern unsigned char GEOS_DLL *GEOSWKBWriter_writeHEX_r(
GEOSContextHandle_t handle,
GEOSWKBWriter* writer,
const GEOSGeometry* g,
size_t *size);
/*
* Specify whether output WKB should be 2d or 3d.
* Return previously set number of dimensions.
*/
extern int GEOS_DLL GEOSWKBWriter_getOutputDimension_r(
GEOSContextHandle_t handle,
const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setOutputDimension_r(
GEOSContextHandle_t handle,
GEOSWKBWriter* writer, int newDimension);
/*
* Specify whether the WKB byte order is big or little endian.
* The return value is the previous byte order.
*/
extern int GEOS_DLL GEOSWKBWriter_getByteOrder_r(GEOSContextHandle_t handle,
const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setByteOrder_r(GEOSContextHandle_t handle,
GEOSWKBWriter* writer,
int byteOrder);
/*
* Specify whether SRID values should be output.
*/
extern char GEOS_DLL GEOSWKBWriter_getIncludeSRID_r(GEOSContextHandle_t handle,
const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setIncludeSRID_r(GEOSContextHandle_t handle,
GEOSWKBWriter* writer, const char writeSRID);
/*
* Free buffers returned by stuff like GEOSWKBWriter_write(),
* GEOSWKBWriter_writeHEX() and GEOSWKTWriter_write().
*/
extern void GEOS_DLL GEOSFree_r(GEOSContextHandle_t handle, void *buffer);
/* External code to GEOS can define GEOS_USE_ONLY_R_API to avoid the */
/* non _r API to be available */
#ifndef GEOS_USE_ONLY_R_API
/************************************************************************
*
* Initialization, cleanup, version
*
***********************************************************************/
extern void GEOS_DLL initGEOS(GEOSMessageHandler notice_function,
GEOSMessageHandler error_function);
extern void GEOS_DLL finishGEOS(void);
/************************************************************************
*
* NOTE - These functions are DEPRECATED. Please use the new Reader and
* writer APIS!
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKT(const char *wkt);
extern char GEOS_DLL *GEOSGeomToWKT(const GEOSGeometry* g);
/*
* Specify whether output WKB should be 2d or 3d.
* Return previously set number of dimensions.
*/
extern int GEOS_DLL GEOS_getWKBOutputDims();
extern int GEOS_DLL GEOS_setWKBOutputDims(int newDims);
/*
* Specify whether the WKB byte order is big or little endian.
* The return value is the previous byte order.
*/
extern int GEOS_DLL GEOS_getWKBByteOrder();
extern int GEOS_DLL GEOS_setWKBByteOrder(int byteOrder);
extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKB_buf(const unsigned char *wkb, size_t size);
extern unsigned char GEOS_DLL *GEOSGeomToWKB_buf(const GEOSGeometry* g, size_t *size);
extern GEOSGeometry GEOS_DLL *GEOSGeomFromHEX_buf(const unsigned char *hex, size_t size);
extern unsigned char GEOS_DLL *GEOSGeomToHEX_buf(const GEOSGeometry* g, size_t *size);
/************************************************************************
*
* Coordinate Sequence functions
*
***********************************************************************/
/*
* Create a Coordinate sequence with ``size'' coordinates
* of ``dims'' dimensions.
* Return NULL on exception.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_create(unsigned int size, unsigned int dims);
/*
* Clone a Coordinate Sequence.
* Return NULL on exception.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_clone(const GEOSCoordSequence* s);
/*
* Destroy a Coordinate Sequence.
*/
extern void GEOS_DLL GEOSCoordSeq_destroy(GEOSCoordSequence* s);
/*
* Set ordinate values in a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_setX(GEOSCoordSequence* s,
unsigned int idx, double val);
extern int GEOS_DLL GEOSCoordSeq_setY(GEOSCoordSequence* s,
unsigned int idx, double val);
extern int GEOS_DLL GEOSCoordSeq_setZ(GEOSCoordSequence* s,
unsigned int idx, double val);
extern int GEOS_DLL GEOSCoordSeq_setOrdinate(GEOSCoordSequence* s,
unsigned int idx, unsigned int dim, double val);
/*
* Get ordinate values from a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_getX(const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getY(const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getZ(const GEOSCoordSequence* s,
unsigned int idx, double *val);
extern int GEOS_DLL GEOSCoordSeq_getOrdinate(const GEOSCoordSequence* s,
unsigned int idx, unsigned int dim, double *val);
/*
* Get size and dimensions info from a Coordinate Sequence.
* Return 0 on exception.
*/
extern int GEOS_DLL GEOSCoordSeq_getSize(const GEOSCoordSequence* s,
unsigned int *size);
extern int GEOS_DLL GEOSCoordSeq_getDimensions(const GEOSCoordSequence* s,
unsigned int *dims);
/************************************************************************
*
* Linear referencing functions -- there are more, but these are
* probably sufficient for most purposes
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
/* Return distance of point 'p' projected on 'g' from origin
* of 'g'. Geometry 'g' must be a lineal geometry */
extern double GEOS_DLL GEOSProject(const GEOSGeometry *g,
const GEOSGeometry* p);
/* Return closest point to given distance within geometry
* Geometry must be a LineString */
extern GEOSGeometry GEOS_DLL *GEOSInterpolate(const GEOSGeometry *g,
double d);
extern double GEOS_DLL GEOSProjectNormalized(const GEOSGeometry *g,
const GEOSGeometry* p);
extern GEOSGeometry GEOS_DLL *GEOSInterpolateNormalized(const GEOSGeometry *g,
double d);
/************************************************************************
*
* Buffer related functions
*
***********************************************************************/
/* @return NULL on exception */
extern GEOSGeometry GEOS_DLL *GEOSBuffer(const GEOSGeometry* g,
double width, int quadsegs);
/* @return 0 on exception */
extern GEOSBufferParams GEOS_DLL *GEOSBufferParams_create();
extern void GEOS_DLL GEOSBufferParams_destroy(GEOSBufferParams* parms);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setEndCapStyle(
GEOSBufferParams* p,
int style);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setJoinStyle(
GEOSBufferParams* p,
int joinStyle);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setMitreLimit(
GEOSBufferParams* p,
double mitreLimit);
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setQuadrantSegments(
GEOSBufferParams* p,
int quadSegs);
/* @param singleSided: 1 for single sided, 0 otherwise */
/* @return 0 on exception */
extern int GEOS_DLL GEOSBufferParams_setSingleSided(
GEOSBufferParams* p,
int singleSided);
/* @return NULL on exception */
extern GEOSGeometry GEOS_DLL *GEOSBufferWithParams(
const GEOSGeometry* g,
const GEOSBufferParams* p,
double width);
/* These functions return NULL on exception. */
extern GEOSGeometry GEOS_DLL *GEOSBufferWithStyle(const GEOSGeometry* g,
double width, int quadsegs, int endCapStyle, int joinStyle,
double mitreLimit);
/* These functions return NULL on exception. Only LINESTRINGs are accepted. */
/* @deprecated in 3.3.0: use GEOSOffsetCurve instead */
extern GEOSGeometry GEOS_DLL *GEOSSingleSidedBuffer(const GEOSGeometry* g,
double width, int quadsegs, int joinStyle, double mitreLimit,
int leftSide);
/*
* Only LINESTRINGs are accepted.
* @param width : offset distance.
* negative for right side offset.
* positive for left side offset.
* @return NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSOffsetCurve(const GEOSGeometry* g,
double width, int quadsegs, int joinStyle, double mitreLimit);
/************************************************************************
*
* Geometry Constructors.
* GEOSCoordSequence* arguments will become ownership of the returned object.
* All functions return NULL on exception.
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSGeom_createPoint(GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPoint();
extern GEOSGeometry GEOS_DLL *GEOSGeom_createLinearRing(GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createLineString(GEOSCoordSequence* s);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyLineString();
/*
* Second argument is an array of GEOSGeometry* objects.
* The caller remains owner of the array, but pointed-to
* objects become ownership of the returned GEOSGeometry.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPolygon();
extern GEOSGeometry GEOS_DLL *GEOSGeom_createPolygon(GEOSGeometry* shell,
GEOSGeometry** holes, unsigned int nholes);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createCollection(int type,
GEOSGeometry* *geoms, unsigned int ngeoms);
extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyCollection(int type);
extern GEOSGeometry GEOS_DLL *GEOSGeom_clone(const GEOSGeometry* g);
/************************************************************************
*
* Memory management
*
***********************************************************************/
extern void GEOS_DLL GEOSGeom_destroy(GEOSGeometry* g);
/************************************************************************
*
* Topology operations - return NULL on exception.
*
***********************************************************************/
extern GEOSGeometry GEOS_DLL *GEOSEnvelope(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSIntersection(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSConvexHull(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSDifference(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSSymDifference(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSBoundary(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSUnion(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern GEOSGeometry GEOS_DLL *GEOSUnaryUnion(const GEOSGeometry* g);
/* @deprecated in 3.3.0: use GEOSUnaryUnion instead */
extern GEOSGeometry GEOS_DLL *GEOSUnionCascaded(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSPointOnSurface(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSGetCentroid(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSNode(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSClipByRect(const GEOSGeometry* g, double xmin, double ymin, double xmax, double ymax);
/*
* all arguments remain ownership of the caller
* (both Geometries and pointers)
*/
extern GEOSGeometry GEOS_DLL *GEOSPolygonize(const GEOSGeometry * const geoms[], unsigned int ngeoms);
extern GEOSGeometry GEOS_DLL *GEOSPolygonizer_getCutEdges(const GEOSGeometry * const geoms[], unsigned int ngeoms);
/*
* Polygonizes a set of Geometries which contain linework that
* represents the edges of a planar graph.
*
* Any dimension of Geometry is handled - the constituent linework
* is extracted to form the edges.
*
* The edges must be correctly noded; that is, they must only meet
* at their endpoints.
* The Polygonizer will still run on incorrectly noded input
* but will not form polygons from incorrectly noded edges.
*
* The Polygonizer reports the follow kinds of errors:
*
* - Dangles - edges which have one or both ends which are
* not incident on another edge endpoint
* - Cut Edges - edges which are connected at both ends but
* which do not form part of polygon
* - Invalid Ring Lines - edges which form rings which are invalid
* (e.g. the component lines contain a self-intersection)
*
* Errors are reported to output parameters "cuts", "dangles" and
* "invalid" (if not-null). Formed polygons are returned as a
* collection. NULL is returned on exception. All returned
* geometries must be destroyed by caller.
*
*/
extern GEOSGeometry GEOS_DLL *GEOSPolygonize_full(const GEOSGeometry* input,
GEOSGeometry** cuts, GEOSGeometry** dangles, GEOSGeometry** invalid);
extern GEOSGeometry GEOS_DLL *GEOSLineMerge(const GEOSGeometry* g);
extern GEOSGeometry GEOS_DLL *GEOSSimplify(const GEOSGeometry* g, double tolerance);
extern GEOSGeometry GEOS_DLL *GEOSTopologyPreserveSimplify(const GEOSGeometry* g,
double tolerance);
/*
* Return all distinct vertices of input geometry as a MULTIPOINT.
* Note that only 2 dimensions of the vertices are considered when
* testing for equality.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeom_extractUniquePoints(
const GEOSGeometry* g);
/*
* Find paths shared between the two given lineal geometries.
*
* Returns a GEOMETRYCOLLECTION having two elements:
* - first element is a MULTILINESTRING containing shared paths
* having the _same_ direction on both inputs
* - second element is a MULTILINESTRING containing shared paths
* having the _opposite_ direction on the two inputs
*
* Returns NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSSharedPaths(const GEOSGeometry* g1,
const GEOSGeometry* g2);
/*
* Snap first geometry on to second with given tolerance
* Returns a newly allocated geometry, or NULL on exception
*/
extern GEOSGeometry GEOS_DLL *GEOSSnap(const GEOSGeometry* g1,
const GEOSGeometry* g2, double tolerance);
/*
* Return a Delaunay triangulation of the vertex of the given geometry
*
* @param g the input geometry whose vertex will be used as "sites"
* @param tolerance optional snapping tolerance to use for improved robustness
* @param onlyEdges if non-zero will return a MULTILINESTRING, otherwise it will
* return a GEOMETRYCOLLECTION containing triangular POLYGONs.
*
* @return a newly allocated geometry, or NULL on exception
*/
extern GEOSGeometry GEOS_DLL * GEOSDelaunayTriangulation(
const GEOSGeometry *g,
double tolerance,
int onlyEdges);
/*
* Returns the Voronoi polygons of a set of Vertices given as input
*
* @param g the input geometry whose vertex will be used as sites.
* @param tolerance snapping tolerance to use for improved robustness
* @param onlyEdges whether to return only edges of the voronoi cells
* @param env clipping envelope for the returned diagram, automatically
* determined if NULL.
* The diagram will be clipped to the larger
* of this envelope or an envelope surrounding the sites.
*
* @return a newly allocated geometry, or NULL on exception.
*/
extern GEOSGeometry GEOS_DLL * GEOSVoronoiDiagram(
const GEOSGeometry *g,
const GEOSGeometry *env,
double tolerance,
int onlyEdges);
/************************************************************************
*
* Binary predicates - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
extern char GEOS_DLL GEOSDisjoint(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSTouches(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSIntersects(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSCrosses(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSWithin(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSContains(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSOverlaps(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSEquals(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSEqualsExact(const GEOSGeometry* g1, const GEOSGeometry* g2, double tolerance);
extern char GEOS_DLL GEOSCovers(const GEOSGeometry* g1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSCoveredBy(const GEOSGeometry* g1, const GEOSGeometry* g2);
/************************************************************************
*
* Prepared Geometry Binary predicates - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
extern const GEOSPreparedGeometry GEOS_DLL *GEOSPrepare(const GEOSGeometry* g);
extern void GEOS_DLL GEOSPreparedGeom_destroy(const GEOSPreparedGeometry* g);
extern char GEOS_DLL GEOSPreparedContains(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedContainsProperly(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCoveredBy(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCovers(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedCrosses(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedDisjoint(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedIntersects(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedOverlaps(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedTouches(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
extern char GEOS_DLL GEOSPreparedWithin(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
/************************************************************************
*
* STRtree functions
*
***********************************************************************/
/*
* GEOSGeometry ownership is retained by caller
*/
extern GEOSSTRtree GEOS_DLL *GEOSSTRtree_create(size_t nodeCapacity);
extern void GEOS_DLL GEOSSTRtree_insert(GEOSSTRtree *tree,
const GEOSGeometry *g,
void *item);
extern void GEOS_DLL GEOSSTRtree_query(GEOSSTRtree *tree,
const GEOSGeometry *g,
GEOSQueryCallback callback,
void *userdata);
extern void GEOS_DLL GEOSSTRtree_iterate(GEOSSTRtree *tree,
GEOSQueryCallback callback,
void *userdata);
extern char GEOS_DLL GEOSSTRtree_remove(GEOSSTRtree *tree,
const GEOSGeometry *g,
void *item);
extern void GEOS_DLL GEOSSTRtree_destroy(GEOSSTRtree *tree);
/************************************************************************
*
* Unary predicate - return 2 on exception, 1 on true, 0 on false
*
***********************************************************************/
extern char GEOS_DLL GEOSisEmpty(const GEOSGeometry* g);
extern char GEOS_DLL GEOSisSimple(const GEOSGeometry* g);
extern char GEOS_DLL GEOSisRing(const GEOSGeometry* g);
extern char GEOS_DLL GEOSHasZ(const GEOSGeometry* g);
extern char GEOS_DLL GEOSisClosed(const GEOSGeometry *g);
/************************************************************************
*
* Dimensionally Extended 9 Intersection Model related
*
***********************************************************************/
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSRelatePattern(const GEOSGeometry* g1, const GEOSGeometry* g2, const char *pat);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSRelate(const GEOSGeometry* g1, const GEOSGeometry* g2);
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSRelatePatternMatch(const char *mat, const char *pat);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSRelateBoundaryNodeRule(const GEOSGeometry* g1,
const GEOSGeometry* g2,
int bnr);
/************************************************************************
*
* Validity checking
*
***********************************************************************/
/* return 2 on exception, 1 on true, 0 on false */
extern char GEOS_DLL GEOSisValid(const GEOSGeometry* g);
/* return NULL on exception, a string to GEOSFree otherwise */
extern char GEOS_DLL *GEOSisValidReason(const GEOSGeometry *g);
/*
* Caller has the responsibility to destroy 'reason' (GEOSFree)
* and 'location' (GEOSGeom_destroy) params
* return 2 on exception, 1 when valid, 0 when invalid
* Use enum GEOSValidFlags values for the flags param.
*/
extern char GEOS_DLL GEOSisValidDetail(const GEOSGeometry* g,
int flags,
char** reason, GEOSGeometry** location);
/************************************************************************
*
* Geometry info
*
***********************************************************************/
/* Return NULL on exception, result must be freed by caller. */
extern char GEOS_DLL *GEOSGeomType(const GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGeomTypeId(const GEOSGeometry* g);
/* Return 0 on exception */
extern int GEOS_DLL GEOSGetSRID(const GEOSGeometry* g);
extern void GEOS_DLL GEOSSetSRID(GEOSGeometry* g, int SRID);
/* May be called on all geometries in GEOS 3.x, returns -1 on error and 1
* for non-multi geometries. Older GEOS versions only accept
* GeometryCollections or Multi* geometries here, and are likely to crash
* when fed simple geometries, so beware if you need compatibility with
* old GEOS versions.
*/
extern int GEOS_DLL GEOSGetNumGeometries(const GEOSGeometry* g);
/*
* Return NULL on exception.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
* Up to GEOS 3.2.0 the input geometry must be a Collection, in
* later version it doesn't matter (getGeometryN(0) for a single will
* return the input).
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetGeometryN(const GEOSGeometry* g, int n);
/* Return -1 on exception */
extern int GEOS_DLL GEOSNormalize(GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGetNumInteriorRings(const GEOSGeometry* g);
/* Return -1 on exception, Geometry must be a LineString. */
extern int GEOS_DLL GEOSGeomGetNumPoints(const GEOSGeometry* g);
/* Return -1 on exception, Geometry must be a Point. */
extern int GEOS_DLL GEOSGeomGetX(const GEOSGeometry *g, double *x);
extern int GEOS_DLL GEOSGeomGetY(const GEOSGeometry *g, double *y);
/*
* Return NULL on exception, Geometry must be a Polygon.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetInteriorRingN(const GEOSGeometry* g, int n);
/*
* Return NULL on exception, Geometry must be a Polygon.
* Returned object is a pointer to internal storage:
* it must NOT be destroyed directly.
*/
extern const GEOSGeometry GEOS_DLL *GEOSGetExteriorRing(const GEOSGeometry* g);
/* Return -1 on exception */
extern int GEOS_DLL GEOSGetNumCoordinates(const GEOSGeometry* g);
/*
* Return NULL on exception.
* Geometry must be a LineString, LinearRing or Point.
*/
extern const GEOSCoordSequence GEOS_DLL *GEOSGeom_getCoordSeq(const GEOSGeometry* g);
/*
* Return 0 on exception (or empty geometry)
*/
extern int GEOS_DLL GEOSGeom_getDimensions(const GEOSGeometry* g);
/*
* Return 2 or 3.
*/
extern int GEOS_DLL GEOSGeom_getCoordinateDimension(const GEOSGeometry* g);
/*
* Return NULL on exception.
* Must be LineString and must be freed by called.
*/
extern GEOSGeometry GEOS_DLL *GEOSGeomGetPointN(const GEOSGeometry *g, int n);
extern GEOSGeometry GEOS_DLL *GEOSGeomGetStartPoint(const GEOSGeometry *g);
extern GEOSGeometry GEOS_DLL *GEOSGeomGetEndPoint(const GEOSGeometry *g);
/************************************************************************
*
* Misc functions
*
***********************************************************************/
/* Return 0 on exception, 1 otherwise */
extern int GEOS_DLL GEOSArea(const GEOSGeometry* g, double *area);
extern int GEOS_DLL GEOSLength(const GEOSGeometry* g, double *length);
extern int GEOS_DLL GEOSDistance(const GEOSGeometry* g1, const GEOSGeometry* g2,
double *dist);
extern int GEOS_DLL GEOSHausdorffDistance(const GEOSGeometry *g1,
const GEOSGeometry *g2, double *dist);
extern int GEOS_DLL GEOSHausdorffDistanceDensify(const GEOSGeometry *g1,
const GEOSGeometry *g2, double densifyFrac, double *dist);
extern int GEOS_DLL GEOSGeomGetLength(const GEOSGeometry *g, double *length);
/* Return 0 on exception, the closest points of the two geometries otherwise.
* The first point comes from g1 geometry and the second point comes from g2.
*/
extern GEOSCoordSequence GEOS_DLL *GEOSNearestPoints(
const GEOSGeometry* g1, const GEOSGeometry* g2);
/************************************************************************
*
* Algorithms
*
***********************************************************************/
/* Walking from A to B:
* return -1 if reaching P takes a counter-clockwise (left) turn
* return 1 if reaching P takes a clockwise (right) turn
* return 0 if P is collinear with A-B
*
* On exceptions, return 2.
*
*/
extern int GEOS_DLL GEOSOrientationIndex(double Ax, double Ay, double Bx, double By,
double Px, double Py);
/************************************************************************
*
* Reader and Writer APIs
*
***********************************************************************/
/* WKT Reader */
extern GEOSWKTReader GEOS_DLL *GEOSWKTReader_create();
extern void GEOS_DLL GEOSWKTReader_destroy(GEOSWKTReader* reader);
extern GEOSGeometry GEOS_DLL *GEOSWKTReader_read(GEOSWKTReader* reader, const char *wkt);
/* WKT Writer */
extern GEOSWKTWriter GEOS_DLL *GEOSWKTWriter_create();
extern void GEOS_DLL GEOSWKTWriter_destroy(GEOSWKTWriter* writer);
extern char GEOS_DLL *GEOSWKTWriter_write(GEOSWKTWriter* writer, const GEOSGeometry* g);
extern void GEOS_DLL GEOSWKTWriter_setTrim(GEOSWKTWriter *writer, char trim);
extern void GEOS_DLL GEOSWKTWriter_setRoundingPrecision(GEOSWKTWriter *writer, int precision);
extern void GEOS_DLL GEOSWKTWriter_setOutputDimension(GEOSWKTWriter *writer, int dim);
extern int GEOS_DLL GEOSWKTWriter_getOutputDimension(GEOSWKTWriter *writer);
extern void GEOS_DLL GEOSWKTWriter_setOld3D(GEOSWKTWriter *writer, int useOld3D);
/* WKB Reader */
extern GEOSWKBReader GEOS_DLL *GEOSWKBReader_create();
extern void GEOS_DLL GEOSWKBReader_destroy(GEOSWKBReader* reader);
extern GEOSGeometry GEOS_DLL *GEOSWKBReader_read(GEOSWKBReader* reader, const unsigned char *wkb, size_t size);
extern GEOSGeometry GEOS_DLL *GEOSWKBReader_readHEX(GEOSWKBReader* reader, const unsigned char *hex, size_t size);
/* WKB Writer */
extern GEOSWKBWriter GEOS_DLL *GEOSWKBWriter_create();
extern void GEOS_DLL GEOSWKBWriter_destroy(GEOSWKBWriter* writer);
/* The caller owns the results for these two methods! */
extern unsigned char GEOS_DLL *GEOSWKBWriter_write(GEOSWKBWriter* writer, const GEOSGeometry* g, size_t *size);
extern unsigned char GEOS_DLL *GEOSWKBWriter_writeHEX(GEOSWKBWriter* writer, const GEOSGeometry* g, size_t *size);
/*
* Specify whether output WKB should be 2d or 3d.
* Return previously set number of dimensions.
*/
extern int GEOS_DLL GEOSWKBWriter_getOutputDimension(const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setOutputDimension(GEOSWKBWriter* writer, int newDimension);
/*
* Specify whether the WKB byte order is big or little endian.
* The return value is the previous byte order.
*/
extern int GEOS_DLL GEOSWKBWriter_getByteOrder(const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setByteOrder(GEOSWKBWriter* writer, int byteOrder);
/*
* Specify whether SRID values should be output.
*/
extern char GEOS_DLL GEOSWKBWriter_getIncludeSRID(const GEOSWKBWriter* writer);
extern void GEOS_DLL GEOSWKBWriter_setIncludeSRID(GEOSWKBWriter* writer, const char writeSRID);
/*
* Free buffers returned by stuff like GEOSWKBWriter_write(),
* GEOSWKBWriter_writeHEX() and GEOSWKTWriter_write().
*/
extern void GEOS_DLL GEOSFree(void *buffer);
#endif /* #ifndef GEOS_USE_ONLY_R_API */
#ifdef __cplusplus
} // extern "C"
#endif
#endif /* #ifndef GEOS_C_H_INCLUDED */
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